mirror of https://github.com/M66B/FairEmail.git
3947 lines
169 KiB
Java
3947 lines
169 KiB
Java
package eu.faircode.email;
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/*
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This file is part of FairEmail.
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FairEmail is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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FairEmail is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with FairEmail. If not, see <http://www.gnu.org/licenses/>.
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Copyright 2018-2023 by Marcel Bokhorst (M66B)
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*/
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import static androidx.core.text.HtmlCompat.TO_HTML_PARAGRAPH_LINES_INDIVIDUAL;
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import static org.w3c.css.sac.Condition.SAC_CLASS_CONDITION;
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import android.app.ActivityManager;
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import android.content.Context;
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import android.content.SharedPreferences;
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import android.content.res.TypedArray;
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import android.graphics.Bitmap;
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import android.graphics.Canvas;
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import android.graphics.Color;
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import android.graphics.Typeface;
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import android.graphics.drawable.Drawable;
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import android.net.Uri;
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import android.os.Build;
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import android.text.Html;
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import android.text.Layout;
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import android.text.Spannable;
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import android.text.SpannableStringBuilder;
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import android.text.Spanned;
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import android.text.TextDirectionHeuristics;
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import android.text.TextUtils;
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import android.text.format.DateUtils;
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import android.text.style.AbsoluteSizeSpan;
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import android.text.style.AlignmentSpan;
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import android.text.style.BackgroundColorSpan;
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import android.text.style.BulletSpan;
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import android.text.style.CharacterStyle;
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import android.text.style.ClickableSpan;
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import android.text.style.ForegroundColorSpan;
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import android.text.style.ImageSpan;
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import android.text.style.QuoteSpan;
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import android.text.style.RelativeSizeSpan;
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import android.text.style.StrikethroughSpan;
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import android.text.style.StyleSpan;
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import android.text.style.TypefaceSpan;
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import android.text.style.URLSpan;
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import android.text.style.UnderlineSpan;
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import android.util.Base64;
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import android.util.Patterns;
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import android.view.View;
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import androidx.annotation.NonNull;
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import androidx.annotation.Nullable;
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import androidx.core.content.ContextCompat;
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import androidx.core.content.FileProvider;
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import androidx.core.content.res.ResourcesCompat;
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import androidx.core.graphics.ColorUtils;
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import androidx.core.util.PatternsCompat;
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import androidx.preference.PreferenceManager;
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import com.steadystate.css.dom.CSSMediaRuleImpl;
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import com.steadystate.css.dom.CSSStyleRuleImpl;
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import com.steadystate.css.dom.MediaListImpl;
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import com.steadystate.css.parser.CSSOMParser;
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import com.steadystate.css.parser.SACParserCSS3;
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import com.steadystate.css.parser.selectors.ClassConditionImpl;
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import com.steadystate.css.parser.selectors.ConditionalSelectorImpl;
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import com.steadystate.css.parser.selectors.ElementSelectorImpl;
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import org.jsoup.nodes.Attribute;
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import org.jsoup.nodes.Comment;
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import org.jsoup.nodes.Document;
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import org.jsoup.nodes.Element;
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import org.jsoup.nodes.Node;
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import org.jsoup.nodes.TextNode;
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import org.jsoup.safety.Cleaner;
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import org.jsoup.safety.Safelist;
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import org.jsoup.select.Elements;
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import org.jsoup.select.NodeFilter;
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import org.jsoup.select.NodeTraversor;
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import org.jsoup.select.NodeVisitor;
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import org.w3c.css.sac.CSSException;
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import org.w3c.css.sac.CSSParseException;
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import org.w3c.css.sac.ErrorHandler;
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import org.w3c.css.sac.InputSource;
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import org.w3c.css.sac.Selector;
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import org.w3c.dom.css.CSSRule;
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import org.w3c.dom.css.CSSRuleList;
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import org.w3c.dom.css.CSSStyleSheet;
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import org.w3c.dom.stylesheets.MediaList;
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import java.io.ByteArrayInputStream;
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import java.io.ByteArrayOutputStream;
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import java.io.File;
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import java.io.FileInputStream;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.StringReader;
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import java.net.URI;
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import java.text.DateFormat;
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import java.text.ParseException;
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import java.text.ParsePosition;
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import java.util.ArrayList;
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import java.util.Arrays;
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import java.util.Collections;
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import java.util.Date;
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import java.util.HashMap;
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import java.util.LinkedHashMap;
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import java.util.List;
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import java.util.Locale;
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import java.util.Map;
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import java.util.regex.Matcher;
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import java.util.regex.Pattern;
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import javax.mail.internet.InternetHeaders;
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import javax.mail.internet.MailDateFormat;
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import javax.mail.internet.MimeUtility;
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public class HtmlHelper {
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static final int PREVIEW_SIZE = 500; // characters
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// https://drafts.csswg.org/css-fonts/#absolute-size-mapping
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static final float FONT_XSMALL = 0.6f; // 10px=0.625
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static final float FONT_SMALL = 0.8f; // 13px=0.8125
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// 16 px
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static final float FONT_LARGE = 1.25f; // 20px=1.2
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static final float FONT_XLARGE = 1.50f; // 24px=1.5
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static final int MAX_FULL_TEXT_SIZE = 1024 * 1024; // characters
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static final int MAX_SHARE_TEXT_SIZE = 50 * 1024; // characters
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static final int MAX_TRANSLATABLE_TEXT_SIZE = 50 * 1024; // characters
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private static final int DEFAULT_FONT_SIZE = 16; // pixels
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private static final int DEFAULT_FONT_SIZE_PT = 12; // points
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private static final int GRAY_THRESHOLD = Math.round(255 * 0.2f);
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private static final int COLOR_THRESHOLD = Math.round(255 * 0.1f);
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private static final float MIN_LUMINANCE_VIEW = 0.7f;
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private static final float MIN_LUMINANCE_COMPOSE = 0.85f;
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private static final int TAB_SIZE = 4;
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private static final int MAX_ALT = 250;
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private static final int MAX_AUTO_LINK = 250;
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private static final int MAX_FORMAT_TEXT_SIZE = 100 * 1024; // characters
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private static final int SMALL_IMAGE_SIZE = 5; // pixels
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private static final int TRACKING_PIXEL_SURFACE = 25; // pixels
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private static final float[] HEADING_SIZES = {1.5f, 1.4f, 1.3f, 1.2f, 1.1f, 1f};
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private static final String LINE = "----------------------------------------";
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private static final String W3NS = /* http/https */ "://www.w3.org/";
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private static final HashMap<String, Integer> x11ColorMap = new HashMap<>();
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// https://www.w3.org/TR/CSS21/propidx.html
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private static final List<String> STYLE_NO_INHERIT = Collections.unmodifiableList(Arrays.asList(
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"background-attachment", "background-color", "background-image", "background-position", "background-repeat", "background",
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"border-color", "border-style", "border-top", "border-right", "border-bottom", "border-left",
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"border-top-color", "border-right-color", "border-bottom-color", "border-left-color",
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"border-top-style", "border-right-style", "border-bottom-style", "border-left-style",
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"border-top-width", "border-right-width", "border-bottom-width", "border-left-width",
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"border-width", "border",
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"bottom",
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"clear",
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"clip",
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"content",
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"counter-increment", "counter-reset",
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"cue-after", "cue-before", "cue",
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"display",
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"float",
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"height",
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"left",
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"margin-right", "margin-left", "margin-top", "margin-bottom", "margin",
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"max-height", "max-width", "min-height", "min-width",
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"outline-color", "outline-style", "outline-width", "outline",
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"overflow",
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"padding-top", "padding-right", "padding-bottom", "padding-left",
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"padding", "page-break-after", "page-break-before", "page-break-inside",
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"pause-after", "pause-before", "pause",
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"play-during",
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"position",
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"right",
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"table-layout",
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"text-decoration",
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"top",
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"unicode-bidi",
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"vertical-align",
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"width",
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"z-index"
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));
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static {
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// https://www.w3.org/TR/css-color-3/
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x11ColorMap.put("aliceblue", 0xF0F8FF);
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x11ColorMap.put("antiquewhite", 0xFAEBD7);
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x11ColorMap.put("aqua", 0x00FFFF);
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x11ColorMap.put("aquamarine", 0x7FFFD4);
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x11ColorMap.put("azure", 0xF0FFFF);
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x11ColorMap.put("beige", 0xF5F5DC);
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x11ColorMap.put("bisque", 0xFFE4C4);
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x11ColorMap.put("black", 0x000000);
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x11ColorMap.put("blanchedalmond", 0xFFEBCD);
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x11ColorMap.put("blue", 0x0000FF);
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x11ColorMap.put("blueviolet", 0x8A2BE2);
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x11ColorMap.put("brown", 0xA52A2A);
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x11ColorMap.put("burlywood", 0xDEB887);
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x11ColorMap.put("cadetblue", 0x5F9EA0);
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x11ColorMap.put("chartreuse", 0x7FFF00);
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x11ColorMap.put("chocolate", 0xD2691E);
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x11ColorMap.put("coral", 0xFF7F50);
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x11ColorMap.put("cornflowerblue", 0x6495ED);
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x11ColorMap.put("cornsilk", 0xFFF8DC);
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x11ColorMap.put("crimson", 0xDC143C);
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x11ColorMap.put("cyan", 0x00FFFF);
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x11ColorMap.put("darkblue", 0x00008B);
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x11ColorMap.put("darkcyan", 0x008B8B);
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x11ColorMap.put("darkgoldenrod", 0xB8860B);
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x11ColorMap.put("darkgray", 0xA9A9A9);
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x11ColorMap.put("darkgreen", 0x006400);
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x11ColorMap.put("darkgrey", 0xA9A9A9);
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x11ColorMap.put("darkkhaki", 0xBDB76B);
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x11ColorMap.put("darkmagenta", 0x8B008B);
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x11ColorMap.put("darkolivegreen", 0x556B2F);
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x11ColorMap.put("darkorange", 0xFF8C00);
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x11ColorMap.put("darkorchid", 0x9932CC);
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x11ColorMap.put("darkred", 0x8B0000);
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x11ColorMap.put("darksalmon", 0xE9967A);
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x11ColorMap.put("darkseagreen", 0x8FBC8F);
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x11ColorMap.put("darkslateblue", 0x483D8B);
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x11ColorMap.put("darkslategray", 0x2F4F4F);
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x11ColorMap.put("darkslategrey", 0x2F4F4F);
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x11ColorMap.put("darkturquoise", 0x00CED1);
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x11ColorMap.put("darkviolet", 0x9400D3);
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x11ColorMap.put("deeppink", 0xFF1493);
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x11ColorMap.put("deepskyblue", 0x00BFFF);
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x11ColorMap.put("dimgray", 0x696969);
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x11ColorMap.put("dimgrey", 0x696969);
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x11ColorMap.put("dodgerblue", 0x1E90FF);
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x11ColorMap.put("firebrick", 0xB22222);
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x11ColorMap.put("floralwhite", 0xFFFAF0);
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x11ColorMap.put("forestgreen", 0x228B22);
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x11ColorMap.put("fuchsia", 0xFF00FF);
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x11ColorMap.put("gainsboro", 0xDCDCDC);
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x11ColorMap.put("ghostwhite", 0xF8F8FF);
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x11ColorMap.put("gold", 0xFFD700);
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x11ColorMap.put("goldenrod", 0xDAA520);
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x11ColorMap.put("gray", 0x808080);
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x11ColorMap.put("green", 0x008000);
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x11ColorMap.put("greenyellow", 0xADFF2F);
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x11ColorMap.put("grey", 0x808080);
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x11ColorMap.put("honeydew", 0xF0FFF0);
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x11ColorMap.put("hotpink", 0xFF69B4);
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x11ColorMap.put("indianred", 0xCD5C5C);
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x11ColorMap.put("indigo", 0x4B0082);
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x11ColorMap.put("ivory", 0xFFFFF0);
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x11ColorMap.put("khaki", 0xF0E68C);
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x11ColorMap.put("lavender", 0xE6E6FA);
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x11ColorMap.put("lavenderblush", 0xFFF0F5);
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x11ColorMap.put("lawngreen", 0x7CFC00);
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x11ColorMap.put("lemonchiffon", 0xFFFACD);
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x11ColorMap.put("lightblue", 0xADD8E6);
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x11ColorMap.put("lightcoral", 0xF08080);
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x11ColorMap.put("lightcyan", 0xE0FFFF);
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x11ColorMap.put("lightgoldenrodyellow", 0xFAFAD2);
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x11ColorMap.put("lightgray", 0xD3D3D3);
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x11ColorMap.put("lightgreen", 0x90EE90);
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x11ColorMap.put("lightgrey", 0xD3D3D3);
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x11ColorMap.put("lightpink", 0xFFB6C1);
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x11ColorMap.put("lightsalmon", 0xFFA07A);
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x11ColorMap.put("lightseagreen", 0x20B2AA);
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x11ColorMap.put("lightskyblue", 0x87CEFA);
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x11ColorMap.put("lightslategray", 0x778899);
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x11ColorMap.put("lightslategrey", 0x778899);
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x11ColorMap.put("lightsteelblue", 0xB0C4DE);
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x11ColorMap.put("lightyellow", 0xFFFFE0);
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x11ColorMap.put("lime", 0x00FF00);
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x11ColorMap.put("limegreen", 0x32CD32);
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x11ColorMap.put("linen", 0xFAF0E6);
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x11ColorMap.put("magenta", 0xFF00FF);
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x11ColorMap.put("maroon", 0x800000);
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x11ColorMap.put("mediumaquamarine", 0x66CDAA);
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x11ColorMap.put("mediumblue", 0x0000CD);
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x11ColorMap.put("mediumorchid", 0xBA55D3);
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x11ColorMap.put("mediumpurple", 0x9370DB);
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x11ColorMap.put("mediumseagreen", 0x3CB371);
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x11ColorMap.put("mediumslateblue", 0x7B68EE);
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x11ColorMap.put("mediumspringgreen", 0x00FA9A);
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x11ColorMap.put("mediumturquoise", 0x48D1CC);
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x11ColorMap.put("mediumvioletred", 0xC71585);
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x11ColorMap.put("midnightblue", 0x191970);
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x11ColorMap.put("mintcream", 0xF5FFFA);
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x11ColorMap.put("mistyrose", 0xFFE4E1);
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x11ColorMap.put("moccasin", 0xFFE4B5);
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x11ColorMap.put("navajowhite", 0xFFDEAD);
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x11ColorMap.put("navy", 0x000080);
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x11ColorMap.put("oldlace", 0xFDF5E6);
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x11ColorMap.put("olive", 0x808000);
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x11ColorMap.put("olivedrab", 0x6B8E23);
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x11ColorMap.put("orange", 0xFFA500);
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x11ColorMap.put("orangered", 0xFF4500);
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x11ColorMap.put("orchid", 0xDA70D6);
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x11ColorMap.put("palegoldenrod", 0xEEE8AA);
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x11ColorMap.put("palegreen", 0x98FB98);
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x11ColorMap.put("paleturquoise", 0xAFEEEE);
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x11ColorMap.put("palevioletred", 0xDB7093);
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x11ColorMap.put("papayawhip", 0xFFEFD5);
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x11ColorMap.put("peachpuff", 0xFFDAB9);
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x11ColorMap.put("peru", 0xCD853F);
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x11ColorMap.put("pink", 0xFFC0CB);
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x11ColorMap.put("plum", 0xDDA0DD);
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x11ColorMap.put("powderblue", 0xB0E0E6);
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x11ColorMap.put("purple", 0x800080);
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x11ColorMap.put("red", 0xFF0000);
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x11ColorMap.put("rosybrown", 0xBC8F8F);
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x11ColorMap.put("royalblue", 0x4169E1);
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x11ColorMap.put("saddlebrown", 0x8B4513);
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x11ColorMap.put("salmon", 0xFA8072);
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x11ColorMap.put("sandybrown", 0xF4A460);
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x11ColorMap.put("seagreen", 0x2E8B57);
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x11ColorMap.put("seashell", 0xFFF5EE);
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x11ColorMap.put("sienna", 0xA0522D);
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x11ColorMap.put("silver", 0xC0C0C0);
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x11ColorMap.put("skyblue", 0x87CEEB);
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x11ColorMap.put("slateblue", 0x6A5ACD);
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x11ColorMap.put("slategray", 0x708090);
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x11ColorMap.put("slategrey", 0x708090);
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x11ColorMap.put("snow", 0xFFFAFA);
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x11ColorMap.put("springgreen", 0x00FF7F);
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x11ColorMap.put("steelblue", 0x4682B4);
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x11ColorMap.put("tan", 0xD2B48C);
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x11ColorMap.put("teal", 0x008080);
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x11ColorMap.put("thistle", 0xD8BFD8);
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x11ColorMap.put("tomato", 0xFF6347);
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x11ColorMap.put("turquoise", 0x40E0D0);
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x11ColorMap.put("violet", 0xEE82EE);
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x11ColorMap.put("wheat", 0xF5DEB3);
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x11ColorMap.put("white", 0xFFFFFF);
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x11ColorMap.put("whitesmoke", 0xF5F5F5);
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x11ColorMap.put("yellow", 0xFFFF00);
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x11ColorMap.put("yellowgreen", 0x9ACD32);
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}
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private static final List<String> TRACKING_HOSTS = Collections.unmodifiableList(Arrays.asList(
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"www.google-analytics.com"
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));
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static Map<Integer, Integer> MAP_WINGDINGS;
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static {
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// http://www.alanwood.net/demos/wingdings.html
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// https://unicode.org/L2/L2011/11052r-wingding.pdf
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Map<Integer, Integer> map = new HashMap<>();
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map.put(37, 0x1F514); // Bell
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map.put(39, 0x1F56F); // Candle
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map.put(44, 0x1F4EA); // Closed mailbox with lowered flag
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map.put(45, 0x1F4EB); // Closed mailbox with raised flag
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map.put(46, 0x1F4EC); // Open mailbox with raised flag
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map.put(47, 0x1F4ED); // Open mailbox with lowered flag
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map.put(48, 0x1F4C1); // Folder
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map.put(49, 0x1F4C2); // Open folder
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map.put(53, 0x1F5C4); // File cabinet
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map.put(54, 0x231B); // Hourglass
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map.put(57, 0x1F5B2); // Trackball
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map.put(58, 0x1F5A5); // Computer
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map.put(65, 0x270C); // Victory hand
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map.put(66, 0x1F44C); // OK hand
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map.put(67, 0x1F44D); // Thumb up
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map.put(68, 0x1F44E); // Thumb down
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map.put(69, 0x1F448); // Pointing left
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map.put(70, 0x1F449); // Pointing right
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map.put(71, 0x261D); // Pointing up
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map.put(72, 0x1F447); // Pointing down
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map.put(73, 0x1F590); // Raised hand
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map.put(74, 0x1F642); // Smiling face
|
|
map.put(75, 0x1F610); // Neutral face
|
|
map.put(76, 0x1F641); // Frowning face
|
|
map.put(77, 0x1F4A3); // Bomb
|
|
map.put(83, 0x1F4A7); // Droplet
|
|
map.put(84, 0x2744); // Snowflake
|
|
map.put(94, 0x2648); // Aries
|
|
map.put(95, 0x2649); // Taurus
|
|
map.put(96, 0x264A); // Gemini
|
|
map.put(97, 0x264B); // Cancer
|
|
map.put(98, 0x264C); // Leo
|
|
map.put(99, 0x264D); // Virgo
|
|
map.put(100, 0x264E); // Libra
|
|
map.put(101, 0x264F); // Scorpio
|
|
map.put(102, 0x2650); // Sagittarius
|
|
map.put(103, 0x2651); // Capricorn
|
|
map.put(104, 0x2652); // Aquarius
|
|
map.put(105, 0x2653); // Pisces
|
|
map.put(183, 0x1F550); // Clock 1
|
|
map.put(184, 0x1F551); // Clock 2
|
|
map.put(185, 0x1F552); // Clock 3
|
|
map.put(186, 0x1F553); // Clock 4
|
|
map.put(187, 0x1F554); // Clock 5
|
|
map.put(188, 0x1F555); // Clock 6
|
|
map.put(189, 0x1F556); // Clock 7
|
|
map.put(190, 0x1F557); // Clock 8
|
|
map.put(191, 0x1F558); // Clock 9
|
|
map.put(192, 0x1F559); // Clock 10
|
|
map.put(193, 0x1F55A); // Clock 11
|
|
map.put(194, 0x1F55B); // Clock 12
|
|
map.put(251, 0x274C); // Red cross
|
|
map.put(252, 0x2705); // Green check
|
|
MAP_WINGDINGS = Collections.unmodifiableMap(map);
|
|
}
|
|
|
|
static Document sanitizeCompose(Context context, String html, boolean show_images) {
|
|
return sanitizeCompose(context, JsoupEx.parse(html), show_images);
|
|
}
|
|
|
|
static Document sanitizeCompose(Context context, Document parsed, boolean show_images) {
|
|
try {
|
|
return sanitize(context, parsed, false, show_images);
|
|
} catch (Throwable ex) {
|
|
// OutOfMemoryError
|
|
Log.e(ex);
|
|
Document document = Document.createShell("");
|
|
Element strong = document.createElement("strong");
|
|
strong.text(android.util.Log.getStackTraceString(ex));
|
|
document.body().appendChild(strong);
|
|
return document;
|
|
}
|
|
}
|
|
|
|
static Document sanitizeView(Context context, Document parsed, boolean show_images) {
|
|
try {
|
|
return sanitize(context, parsed, true, show_images);
|
|
} catch (Throwable ex) {
|
|
// OutOfMemoryError
|
|
Log.e(ex);
|
|
Document document = Document.createShell("");
|
|
Element strong = document.createElement("strong");
|
|
strong.text(android.util.Log.getStackTraceString(ex));
|
|
document.body().appendChild(strong);
|
|
return document;
|
|
}
|
|
}
|
|
|
|
private static int getMaxFormatTextSize(Context context) {
|
|
ActivityManager am = Helper.getSystemService(context, ActivityManager.class);
|
|
int mc = am.getMemoryClass();
|
|
if (mc >= 256)
|
|
return MAX_FORMAT_TEXT_SIZE;
|
|
else
|
|
return mc * MAX_FORMAT_TEXT_SIZE / 256;
|
|
}
|
|
|
|
private static Document sanitize(Context context, Document parsed, boolean view, boolean show_images) {
|
|
SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
|
|
String theme = prefs.getString("theme", "blue_orange_system");
|
|
boolean bw = "black_and_white".equals(theme);
|
|
boolean background_color = (!view || (!bw && prefs.getBoolean("background_color", false)));
|
|
boolean text_color = (!view || (!bw && prefs.getBoolean("text_color", true)));
|
|
boolean text_size = (!view || prefs.getBoolean("text_size", true));
|
|
boolean text_font = (!view || prefs.getBoolean("text_font", true));
|
|
boolean text_align = prefs.getBoolean("text_align", true);
|
|
boolean text_titles = prefs.getBoolean("text_titles", false);
|
|
boolean display_hidden = prefs.getBoolean("display_hidden", false);
|
|
boolean disable_tracking = prefs.getBoolean("disable_tracking", true);
|
|
boolean parse_classes = prefs.getBoolean("parse_classes", true);
|
|
boolean inline_images = prefs.getBoolean("inline_images", false);
|
|
boolean text_separators = prefs.getBoolean("text_separators", true);
|
|
boolean image_placeholders = prefs.getBoolean("image_placeholders", true);
|
|
|
|
boolean dark = Helper.isDarkTheme(context);
|
|
int textColorPrimary = Helper.resolveColor(context, android.R.attr.textColorPrimary);
|
|
int textColorPrimaryInverse = Helper.resolveColor(context, android.R.attr.textColorPrimaryInverse);
|
|
|
|
int textSizeSmall;
|
|
TypedArray ta = context.obtainStyledAttributes(
|
|
R.style.TextAppearance_AppCompat_Small, new int[]{android.R.attr.textSize});
|
|
if (ta == null)
|
|
textSizeSmall = Helper.dp2pixels(context, 6);
|
|
else {
|
|
textSizeSmall = ta.getDimensionPixelSize(0, 0);
|
|
ta.recycle();
|
|
}
|
|
|
|
// https://chromium.googlesource.com/chromium/blink/+/master/Source/core/css/html.css
|
|
|
|
// <!--[if ...]><!--> ... <!--<![endif]-->
|
|
// https://docs.microsoft.com/en-us/previous-versions/windows/internet-explorer/ie-developer/compatibility/hh801214(v=vs.85)
|
|
if (!display_hidden && false)
|
|
parsed.filter(new NodeFilter() {
|
|
private boolean remove = false;
|
|
|
|
@Override
|
|
public FilterResult head(Node node, int depth) {
|
|
if (node instanceof Comment) {
|
|
String data = ((Comment) node).getData().trim();
|
|
if (data.startsWith("[if") && !data.endsWith("endif]")) {
|
|
remove = true;
|
|
return FilterResult.REMOVE;
|
|
} else if (remove && data.endsWith("endif]")) {
|
|
remove = false;
|
|
return FilterResult.REMOVE;
|
|
}
|
|
}
|
|
return (remove ? FilterResult.REMOVE : FilterResult.CONTINUE);
|
|
}
|
|
|
|
@Override
|
|
public FilterResult tail(Node node, int depth) {
|
|
return FilterResult.CONTINUE;
|
|
}
|
|
});
|
|
|
|
// Fix Microsoft namespaces
|
|
normalizeNamespaces(parsed, display_hidden);
|
|
|
|
// Limit length
|
|
if (view && truncate(parsed, getMaxFormatTextSize(context))) {
|
|
parsed.body()
|
|
.appendElement("p")
|
|
.appendElement("em")
|
|
.text(context.getString(R.string.title_too_large));
|
|
parsed.body()
|
|
.appendElement("p")
|
|
.appendElement("big")
|
|
.appendElement("a")
|
|
.attr("href", "full:")
|
|
.text(context.getString(R.string.title_show_full));
|
|
}
|
|
|
|
// https://developer.mozilla.org/en-US/docs/Web/HTML/Element/style
|
|
List<CSSStyleSheet> sheets = new ArrayList<>();
|
|
if (parse_classes)
|
|
sheets = parseStyles(parsed.head().select("style"));
|
|
|
|
Safelist safelist = Safelist.relaxed()
|
|
.addTags("hr", "abbr", "big", "font", "dfn", "del", "s", "tt", "mark")
|
|
.addAttributes(":all", "class")
|
|
.addAttributes(":all", "style")
|
|
.addAttributes("span", "dir")
|
|
.addAttributes("li", "dir")
|
|
.addAttributes("div", "x-plain")
|
|
.removeTags("col", "colgroup")
|
|
.removeTags("thead", "tbody", "tfoot")
|
|
.addAttributes("td", "width")
|
|
.addAttributes("td", "height")
|
|
.addAttributes("tr", "width")
|
|
.addAttributes("tr", "height")
|
|
.addAttributes(":all", "title")
|
|
.addAttributes("blockquote", "type")
|
|
.removeAttributes("td", "colspan", "rowspan", "width")
|
|
.removeAttributes("th", "colspan", "rowspan", "width")
|
|
.addProtocols("img", "src", "cid")
|
|
.addProtocols("img", "src", "data")
|
|
.removeTags("a").addAttributes("a", "href", "title");
|
|
if (text_color)
|
|
safelist.addAttributes("font", "color");
|
|
if (text_size)
|
|
safelist.addAttributes("font", "size");
|
|
if (text_font)
|
|
safelist.addAttributes("font", "face");
|
|
if (text_align)
|
|
safelist.addTags("center").addAttributes(":all", "align");
|
|
if (!view)
|
|
safelist.addProtocols("img", "src", "content");
|
|
|
|
final Document document = new Cleaner(safelist).clean(parsed);
|
|
|
|
// Remove tracking pixels
|
|
if (disable_tracking)
|
|
removeTrackingPixels(context, document);
|
|
|
|
// https://developer.mozilla.org/en-US/docs/Web/HTML/Element/font
|
|
for (Element font : document.select("font")) {
|
|
String style = font.attr("style");
|
|
String color = font.attr("color").trim();
|
|
String size = font.attr("size").trim();
|
|
String face = font.attr("face").trim();
|
|
|
|
style = style.trim();
|
|
if (!TextUtils.isEmpty(style) && !style.endsWith(";"))
|
|
style += ";";
|
|
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N)
|
|
font.removeAttr("color");
|
|
font.removeAttr("size");
|
|
font.removeAttr("face");
|
|
|
|
StringBuilder sb = new StringBuilder(style);
|
|
|
|
if (!TextUtils.isEmpty(color))
|
|
sb.append("color:").append(color).append(";");
|
|
|
|
if (!TextUtils.isEmpty(size))
|
|
try {
|
|
int s = Integer.parseInt(size);
|
|
if (size.startsWith("-")) {
|
|
if (s < 0)
|
|
size = "smaller";
|
|
else
|
|
throw new NumberFormatException("size=" + size);
|
|
} else if (size.startsWith("+")) {
|
|
if (s > 0)
|
|
size = "larger";
|
|
else
|
|
throw new NumberFormatException("size=" + size);
|
|
} else {
|
|
if (s < 2)
|
|
size = "x-small";
|
|
else if (s < 3)
|
|
size = "small";
|
|
else if (s > 4)
|
|
size = "x-large";
|
|
else if (s > 3)
|
|
size = "large";
|
|
else
|
|
size = "medium";
|
|
}
|
|
sb.append("font-size:").append(size).append(";");
|
|
} catch (NumberFormatException ex) {
|
|
Log.i(ex);
|
|
}
|
|
|
|
if (!TextUtils.isEmpty(face)) {
|
|
sb.append("font-family:");
|
|
String[] faces = face.split(",");
|
|
for (int i = 0; i < faces.length; i++) {
|
|
if (i > 0)
|
|
sb.append(',');
|
|
String f = faces[i].trim();
|
|
if (f.contains(" ") && !f.startsWith("\"") && !f.endsWith("\""))
|
|
sb.append('"').append(f).append('"');
|
|
else
|
|
sb.append(f);
|
|
}
|
|
sb.append(";");
|
|
}
|
|
|
|
font.attr("style", sb.toString());
|
|
|
|
font.tagName("span");
|
|
}
|
|
|
|
// Sanitize styles
|
|
for (Element element : document.select("*")) {
|
|
// Class style
|
|
String tag = element.tagName();
|
|
String clazz = element.className();
|
|
String style = processStyles(tag, clazz, null, sheets);
|
|
|
|
// Element style
|
|
style = mergeElementStyles(style, element.attr("style"));
|
|
|
|
if ("fairemail_debug_info".equals(clazz))
|
|
style = mergeStyles(style, "font-size: smaller");
|
|
|
|
if (text_align) {
|
|
// https://developer.mozilla.org/en-US/docs/Web/HTML/Element/center
|
|
if ("center".equals(element.tagName())) {
|
|
style = mergeStyles(style, "text-align:center");
|
|
element.tagName("div");
|
|
} else if ("table".equals(element.tagName()))
|
|
style = mergeStyles(style, "text-align:left");
|
|
else {
|
|
// https://developer.mozilla.org/en-US/docs/Web/HTML/Attributes
|
|
String align = element.attr("align");
|
|
if (!TextUtils.isEmpty(align))
|
|
style = mergeStyles(style, "text-align:" + align);
|
|
}
|
|
}
|
|
|
|
// Process style
|
|
if (!TextUtils.isEmpty(style)) {
|
|
boolean block = false;
|
|
StringBuilder sb = new StringBuilder();
|
|
if (!view &&
|
|
"span".equals(element.tagName()) &&
|
|
"rtl".equals(element.attr("dir")))
|
|
block = true;
|
|
|
|
Map<String, String> kv = new LinkedHashMap<>();
|
|
String[] params = style.split(";");
|
|
for (String param : params) {
|
|
int colon = param.indexOf(':');
|
|
if (colon <= 0)
|
|
continue;
|
|
String key = param.substring(0, colon)
|
|
.trim()
|
|
.toLowerCase(Locale.ROOT);
|
|
String value = param.substring(colon + 1)
|
|
.trim()
|
|
.toLowerCase(Locale.ROOT)
|
|
.replace("!important", "")
|
|
.replaceAll("\\s+", " ");
|
|
kv.put(key, value);
|
|
}
|
|
|
|
List<String> keys = new ArrayList<>(kv.keySet());
|
|
Collections.sort(keys); // background-color first
|
|
|
|
for (String key : keys) {
|
|
String value = kv.get(key);
|
|
switch (key) {
|
|
case "background-image":
|
|
// https://developer.mozilla.org/en-US/docs/Web/CSS/background-image
|
|
String url = value.replace(" ", "");
|
|
int us = url.indexOf("url(");
|
|
int ue = url.indexOf(')', us + 4);
|
|
if (us >= 0 && ue > us) {
|
|
url = url.substring(us + 4, ue);
|
|
if ((url.startsWith("'") && url.endsWith("'")) ||
|
|
(url.startsWith("\"") && url.endsWith("\"")))
|
|
url = url.substring(1, url.length() - 1);
|
|
Element img = document.createElement("img")
|
|
.attr("src", url);
|
|
element.prependElement("br");
|
|
element.prependChild(img);
|
|
}
|
|
break;
|
|
case "color":
|
|
case "background":
|
|
case "background-color":
|
|
// https://developer.mozilla.org/en-US/docs/Web/CSS/color
|
|
// https://developer.mozilla.org/en-US/docs/Web/CSS/background
|
|
// https://developer.mozilla.org/en-US/docs/Web/CSS/background-color
|
|
if ("color".equals(key)) {
|
|
if (!text_color)
|
|
continue;
|
|
} else {
|
|
if (!background_color)
|
|
continue;
|
|
}
|
|
|
|
Integer color = parseColor(value);
|
|
|
|
if (color != null && color == Color.TRANSPARENT) {
|
|
if ("color".equals(key) && BuildConfig.DEBUG)
|
|
if (display_hidden)
|
|
sb.append("text-decoration:line-through;");
|
|
else if (false) {
|
|
Log.i("Removing color transparent " + element.tagName());
|
|
element.remove();
|
|
continue;
|
|
}
|
|
color = null;
|
|
}
|
|
|
|
if ("color".equals(key)) {
|
|
Integer bg = null;
|
|
if (background_color) {
|
|
Element e = element;
|
|
while (e != null && bg == null)
|
|
if (e.hasAttr("x-background"))
|
|
bg = parseWebColor(e.attr("x-background"));
|
|
else
|
|
e = e.parent();
|
|
}
|
|
|
|
if (!view &&
|
|
color != null && (bg == null || bg == Color.TRANSPARENT)) {
|
|
// Special case:
|
|
// external draft: very dark/light font
|
|
double lum = ColorUtils.calculateLuminance(color);
|
|
if (lum < 1 - MIN_LUMINANCE_COMPOSE || lum > MIN_LUMINANCE_COMPOSE)
|
|
color = null;
|
|
}
|
|
|
|
if (bg == null) {
|
|
if (color != null && view)
|
|
color = adjustColor(dark, textColorPrimary, color);
|
|
} else if (bg == Color.TRANSPARENT) {
|
|
// Background color was suppressed because "no color"
|
|
if (color != null) {
|
|
double lum = ColorUtils.calculateLuminance(color);
|
|
if (dark ? lum < 1 - MIN_LUMINANCE_VIEW : lum > MIN_LUMINANCE_VIEW)
|
|
color = textColorPrimary;
|
|
}
|
|
}
|
|
|
|
if (color != null)
|
|
element.attr("x-color", "true");
|
|
} else /* background */ {
|
|
if (color != null && !hasColor(color))
|
|
color = Color.TRANSPARENT;
|
|
|
|
if (color != null)
|
|
element.attr("x-background", encodeWebColor(color));
|
|
|
|
if (color != null && dark) {
|
|
boolean fg = false;
|
|
if (text_color) {
|
|
fg = (parseColor(kv.get("color")) != null);
|
|
Element e = element;
|
|
while (e != null && !fg)
|
|
if (e.hasAttr("x-color"))
|
|
fg = true;
|
|
else
|
|
e = e.parent();
|
|
}
|
|
|
|
// Dark theme, background color with no text color:
|
|
// force (inverse) text color
|
|
if (!fg) {
|
|
double lum = (color == Color.TRANSPARENT ? 0 : ColorUtils.calculateLuminance(color));
|
|
int c = (lum < 0.5 ? textColorPrimary : textColorPrimaryInverse);
|
|
sb.append("color")
|
|
.append(':')
|
|
.append(encodeWebColor(c))
|
|
.append(";");
|
|
}
|
|
}
|
|
}
|
|
|
|
if (color == null) {
|
|
element.removeAttr(key);
|
|
continue;
|
|
}
|
|
|
|
String c = encodeWebColor(color);
|
|
sb.append(key).append(':').append(c).append(";");
|
|
if (Build.VERSION.SDK_INT < Build.VERSION_CODES.N)
|
|
element.attr(key, c);
|
|
break;
|
|
|
|
case "font-size":
|
|
// https://developer.mozilla.org/en-US/docs/Web/CSS/font-size
|
|
if (!text_size)
|
|
continue;
|
|
|
|
float current;
|
|
if (tag.length() == 2 &&
|
|
tag.charAt(0) == 'h' &&
|
|
Character.isDigit(tag.charAt(1)))
|
|
current = HEADING_SIZES[tag.charAt(1) - '1'];
|
|
else
|
|
current = 1.0f;
|
|
|
|
Element parent = element.parent();
|
|
while (parent != null) {
|
|
String xFontSize = parent.attr("x-font-size");
|
|
if (!TextUtils.isEmpty(xFontSize)) {
|
|
current = Float.parseFloat(xFontSize);
|
|
break;
|
|
}
|
|
parent = parent.parent();
|
|
}
|
|
|
|
Float fsize = getFontSize(value, current);
|
|
if (fsize != null)
|
|
if (fsize == 0) {
|
|
if (BuildConfig.DEBUG)
|
|
if (display_hidden && false)
|
|
sb.append("text-decoration:line-through;");
|
|
else if (false) {
|
|
Log.i("Removing font size zero " + element.tagName());
|
|
element.remove();
|
|
}
|
|
} else {
|
|
if (!view) {
|
|
if (fsize < 1)
|
|
fsize = (fsize < FONT_SMALL ? FONT_XSMALL : FONT_SMALL);
|
|
else if (fsize > 1)
|
|
fsize = (fsize > FONT_LARGE ? FONT_XLARGE : FONT_LARGE);
|
|
}
|
|
element.attr("x-font-size", Float.toString(fsize));
|
|
element.attr("x-font-size-rel", Float.toString(fsize / current));
|
|
}
|
|
break;
|
|
|
|
case "font-weight":
|
|
if (element.parent() != null) {
|
|
Integer fweight = getFontWeight(value);
|
|
if (fweight != null && fweight >= 600) {
|
|
Element strong = new Element("strong");
|
|
for (Node child : new ArrayList<>(element.childNodes())) {
|
|
child.remove();
|
|
strong.appendChild(child);
|
|
}
|
|
element.appendChild(strong);
|
|
}
|
|
}
|
|
break;
|
|
|
|
case "font-family":
|
|
if (!text_font)
|
|
continue;
|
|
|
|
// https://developer.mozilla.org/en-US/docs/Web/CSS/font-family
|
|
sb.append(key).append(":").append(value).append(";");
|
|
break;
|
|
|
|
case "font-style":
|
|
// https://developer.mozilla.org/en-US/docs/Web/CSS/font-style
|
|
if (value.contains("italic") || value.contains("oblique"))
|
|
sb.append(key).append(":").append("italic").append(";");
|
|
break;
|
|
|
|
case "text-decoration":
|
|
case "text-decoration-line":
|
|
// https://developer.mozilla.org/en-US/docs/Web/CSS/text-decoration
|
|
// https://developer.mozilla.org/en-US/docs/Web/CSS/text-decoration-line
|
|
if (value.contains("line-through"))
|
|
sb.append("text-decoration:line-through;");
|
|
else if (value.contains("underline"))
|
|
sb.append("text-decoration:underline;");
|
|
break;
|
|
|
|
case "text-transform":
|
|
// https://developer.mozilla.org/en-US/docs/Web/CSS/text-transform
|
|
NodeTraversor.traverse(new NodeVisitor() {
|
|
@Override
|
|
public void head(Node node, int depth) {
|
|
if (node instanceof TextNode) {
|
|
TextNode tnode = (TextNode) node;
|
|
String text = tnode.getWholeText();
|
|
switch (value) {
|
|
case "capitalize":
|
|
// TODO: capitalize
|
|
break;
|
|
case "uppercase":
|
|
tnode.text(text.toUpperCase(Locale.ROOT));
|
|
break;
|
|
case "lowercase":
|
|
tnode.text(text.toLowerCase(Locale.ROOT));
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
@Override
|
|
public void tail(Node node, int depth) {
|
|
// Do nothing
|
|
}
|
|
}, element);
|
|
break;
|
|
|
|
case "display":
|
|
// https://developer.mozilla.org/en-US/docs/Web/CSS/display
|
|
if (element.parent() != null && "none".equals(value)) {
|
|
if (display_hidden)
|
|
sb.append("text-decoration:line-through;");
|
|
else {
|
|
Log.i("Removing display none " + element.tagName());
|
|
element.remove();
|
|
}
|
|
}
|
|
|
|
if ("block".equals(value) || "inline-block".equals(value))
|
|
element.attr("x-block", "true");
|
|
|
|
if ("inline".equals(value) || "inline-block".equals(value)) {
|
|
if (element.nextSibling() != null)
|
|
element.attr("x-inline", "true");
|
|
}
|
|
break;
|
|
/*
|
|
case "height":
|
|
case "width":
|
|
//case "font-size":
|
|
//case "line-height":
|
|
if (element.parent() != null && !display_hidden) {
|
|
Float s = getFontSize(value, 1.0f);
|
|
if (s != null && s == 0) {
|
|
if (!"table".equals(element.tagName())) {
|
|
Log.i("Removing no height/width " + element.tagName());
|
|
element.remove();
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
*/
|
|
case "margin":
|
|
case "padding":
|
|
case "margin-top":
|
|
case "margin-bottom":
|
|
case "padding-top":
|
|
case "padding-bottom":
|
|
// https://developer.mozilla.org/en-US/docs/Web/CSS/margin
|
|
// https://developer.mozilla.org/en-US/docs/Web/CSS/padding
|
|
if (element.isBlock()) {
|
|
Float[] p = new Float[4];
|
|
|
|
String[] v = value.split(" ");
|
|
for (int i = 0; i < v.length && i < p.length; i++)
|
|
p[i] = getFontSize(v[i], 1.0f);
|
|
|
|
if (v.length == 1) {
|
|
p[1] = p[0];
|
|
p[2] = p[0];
|
|
p[3] = p[0];
|
|
} else if (v.length == 2) {
|
|
p[2] = p[0];
|
|
p[3] = p[1];
|
|
}
|
|
|
|
if (key.endsWith("top"))
|
|
p[2] = null;
|
|
else if (key.endsWith("bottom"))
|
|
p[0] = null;
|
|
|
|
if (p[0] != null)
|
|
if (p[0] == 0)
|
|
element.attr("x-line-before", "false");
|
|
else if (p[0] > 0.5)
|
|
element.attr("x-line-before", "true");
|
|
if (p[2] != null)
|
|
if (p[2] == 0)
|
|
element.attr("x-line-after", "false");
|
|
else if (p[2] > 0.5)
|
|
element.attr("x-line-after", "true");
|
|
}
|
|
break;
|
|
|
|
case "text-align":
|
|
// https://developer.mozilla.org/en-US/docs/Web/CSS/text-align
|
|
if (text_align) {
|
|
if (!element.isBlock())
|
|
block = true;
|
|
element.attr("x-align", value);
|
|
sb.append(key).append(':').append(value).append(';');
|
|
}
|
|
break;
|
|
|
|
case "border-left":
|
|
case "border-right":
|
|
if (value != null) {
|
|
// 1px solid rgb(204,204,204)
|
|
Float border = getFontSize(value.trim().split("\\s+")[0], 1.0f);
|
|
if (border != null && border > 0) {
|
|
element.attr("x-border", "true");
|
|
if (!view) {
|
|
sb.append("border-left").append(':').append("3px solid #ccc").append(';');
|
|
sb.append("padding-left").append(':').append("3px").append(';');
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
|
|
case "list-style-type":
|
|
// https://developer.mozilla.org/en-US/docs/Web/CSS/list-style-type
|
|
element.attr("x-list-style", value);
|
|
if (!view)
|
|
sb.append(key).append(':').append(value).append(';');
|
|
break;
|
|
|
|
case "visibility":
|
|
// https://developer.mozilla.org/en-US/docs/Web/CSS/visibility
|
|
if (element.parent() != null &&
|
|
("hidden".equals(value) || "collapse".equals(value)))
|
|
if (display_hidden)
|
|
sb.append("text-decoration:line-through;");
|
|
else
|
|
sb.append(key).append(':').append("hidden").append(';');
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (block) {
|
|
sb.append("display:block;");
|
|
Element next = element.nextElementSibling();
|
|
if (next != null && "br".equals(next.tagName()))
|
|
next.remove();
|
|
}
|
|
|
|
if (sb.length() == 0)
|
|
element.removeAttr("style");
|
|
else {
|
|
element.attr("style", sb.toString());
|
|
if (BuildConfig.DEBUG)
|
|
Log.i("Style=" + sb);
|
|
}
|
|
}
|
|
|
|
if (element.isBlock() &&
|
|
!"true".equals(element.attr("x-inline")))
|
|
element.attr("x-block", "true");
|
|
}
|
|
|
|
// Insert titles
|
|
if (text_titles)
|
|
for (Element e : document.select("[title]")) {
|
|
String title = e.attr("title");
|
|
if (TextUtils.isEmpty(title))
|
|
continue;
|
|
if ("img".equals(e.tagName()) &&
|
|
title.equals(e.attr("alt")))
|
|
continue;
|
|
e.prependChild(document.createElement("span").text("{" + title + "}"));
|
|
}
|
|
|
|
// Replace headings
|
|
Elements hs = document.select("h1,h2,h3,h4,h5,h6");
|
|
hs.attr("x-line-before", "true");
|
|
if (text_size) {
|
|
if (text_separators && view)
|
|
for (Element h : hs)
|
|
h.appendElement("hr")
|
|
.attr("x-block", "true");
|
|
else
|
|
hs.attr("x-line-after", "true");
|
|
} else {
|
|
hs.tagName("strong");
|
|
hs.attr("x-line-after", "true");
|
|
}
|
|
|
|
// Paragraphs
|
|
for (Element p : document.select("p")) {
|
|
p.tagName("div");
|
|
if (p.childNodeSize() != 0) {
|
|
if (p.childNodeSize() == 1) {
|
|
Node lonely = p.childNode(0);
|
|
if (lonely instanceof TextNode &&
|
|
"\u00a0".equals(((TextNode) lonely).getWholeText()))
|
|
continue;
|
|
}
|
|
p.attr("x-paragraph", "true");
|
|
}
|
|
}
|
|
|
|
// Short inline quotes
|
|
// https://developer.mozilla.org/en-US/docs/Web/HTML/Element/q
|
|
for (Element q : document.select("q")) {
|
|
q.tagName("a");
|
|
String cite = q.attr("cite");
|
|
if (!TextUtils.isEmpty(cite) && !cite.trim().startsWith("#"))
|
|
q.attr("href", cite);
|
|
q.removeAttr("cite");
|
|
}
|
|
|
|
// Citation
|
|
// https://developer.mozilla.org/en-US/docs/Web/HTML/Element/cite
|
|
for (Element cite : document.select("cite")) {
|
|
cite.prependText("\"");
|
|
cite.appendText("\"");
|
|
cite.tagName("em");
|
|
}
|
|
|
|
// Definition
|
|
// https://developer.mozilla.org/en-US/docs/Web/HTML/Element/dfn
|
|
for (Element dfn : document.select("dfn"))
|
|
dfn.tagName("em");
|
|
|
|
// Pre formatted text
|
|
// https://developer.mozilla.org/en-US/docs/Web/HTML/Element/pre
|
|
for (Element pre : document.select("pre")) {
|
|
NodeTraversor.traverse(new NodeVisitor() {
|
|
private int index = 0;
|
|
private boolean inElement = false;
|
|
|
|
@Override
|
|
public void head(Node node, int depth) {
|
|
if (node instanceof Element)
|
|
inElement = true;
|
|
else if (node instanceof TextNode) {
|
|
if (inElement) {
|
|
TextNode tnode = (TextNode) node;
|
|
StringBuilder sb = new StringBuilder();
|
|
for (Character c : tnode.getWholeText().toCharArray()) {
|
|
if (c == '\t')
|
|
do {
|
|
index++;
|
|
sb.append(' ');
|
|
}
|
|
while ((index % TAB_SIZE) != 0);
|
|
else {
|
|
if (c == '\n')
|
|
index = 0;
|
|
else
|
|
index++;
|
|
sb.append(c);
|
|
}
|
|
}
|
|
tnode.text(sb.toString());
|
|
}
|
|
}
|
|
}
|
|
|
|
@Override
|
|
public void tail(Node node, int depth) {
|
|
if (node instanceof Element)
|
|
inElement = false;
|
|
}
|
|
}, pre);
|
|
|
|
pre.tagName("div");
|
|
pre.attr("x-plain", "true");
|
|
}
|
|
|
|
// Code
|
|
// https://developer.mozilla.org/en-US/docs/Web/HTML/Element/code
|
|
document.select("code").tagName("strong");
|
|
|
|
// Lines
|
|
// https://developer.mozilla.org/en-US/docs/Web/HTML/Element/hr
|
|
for (Element hr : document.select("hr"))
|
|
hr.attr("x-keep-line", "true");
|
|
|
|
// Descriptions
|
|
// https://developer.mozilla.org/en-US/docs/Web/HTML/Element/dl
|
|
document.select("dl").tagName("div");
|
|
for (Element dt : document.select("dt"))
|
|
dt.tagName("strong");
|
|
for (Element dd : document.select("dd")) {
|
|
dd.tagName("em");
|
|
dd.attr("x-line-after", "true");
|
|
}
|
|
|
|
// Abbreviations
|
|
// https://developer.mozilla.org/en-US/docs/Web/HTML/Element/abbr
|
|
document.select("abbr").tagName("u");
|
|
|
|
// Tables
|
|
// https://developer.mozilla.org/en-US/docs/Web/HTML/Element/table
|
|
for (Element table : document.select("table")) {
|
|
table.tagName("div");
|
|
// Ignore summary attribute
|
|
for (Element row : table.children()) {
|
|
row.tagName("div");
|
|
|
|
Element separate = null;
|
|
List<Node> merge = new ArrayList<>();
|
|
for (Element col : row.children()) {
|
|
Element next = col.nextElementSibling();
|
|
|
|
// Get nodes with content
|
|
List<Node> nodes = new ArrayList<>(col.childNodes());
|
|
while (nodes.size() > 0) {
|
|
Node first = nodes.get(0);
|
|
if (first instanceof TextNode && ((TextNode) first).isBlank()) {
|
|
nodes.remove(0);
|
|
continue;
|
|
}
|
|
|
|
Node last = nodes.get(nodes.size() - 1);
|
|
if (last instanceof TextNode && ((TextNode) last).isBlank()) {
|
|
nodes.remove(nodes.size() - 1);
|
|
continue;
|
|
}
|
|
|
|
break;
|
|
}
|
|
|
|
// Merge single images into next column
|
|
if (nodes.size() == 1) {
|
|
Node lonely = nodes.get(0);
|
|
|
|
// prevent extra newlines
|
|
lonely.removeAttr("x-paragraph");
|
|
|
|
if (next == null ||
|
|
next.attr("x-align")
|
|
.equals(col.attr("x-align"))) {
|
|
if (lonely instanceof Element &&
|
|
"img".equals(lonely.nodeName())) {
|
|
lonely.remove();
|
|
lonely.removeAttr("x-block");
|
|
merge.add(lonely);
|
|
if (next != null)
|
|
continue;
|
|
}
|
|
}
|
|
|
|
if (lonely instanceof TextNode &&
|
|
"\u00a0".equals(((TextNode) lonely).getWholeText()))
|
|
lonely.remove(); // -> column separator
|
|
}
|
|
|
|
if (merge.size() > 0) {
|
|
for (int m = merge.size() - 1; m >= 0; m--)
|
|
col.prependChild(merge.get(m));
|
|
merge.clear();
|
|
}
|
|
|
|
if ("th".equals(col.tagName())) {
|
|
Element strong = new Element("strong");
|
|
for (Node child : new ArrayList<>(col.childNodes())) {
|
|
child.remove();
|
|
strong.appendChild(child);
|
|
}
|
|
col.appendChild(strong);
|
|
}
|
|
|
|
// Flow not / left aligned columns
|
|
String align = col.attr("x-align");
|
|
//if (next == null && row.childrenSize() == 2) {
|
|
// align = "end";
|
|
// String style = col.attr("style");
|
|
// col.attr("style",
|
|
// mergeStyles(style, "text-align:" + align));
|
|
//}
|
|
if (TextUtils.isEmpty(align) ||
|
|
"left".equals(align) ||
|
|
"start".equals(align)) {
|
|
col.removeAttr("x-block");
|
|
if (separate != null)
|
|
separate.attr("x-column", "true");
|
|
separate = col;
|
|
} else {
|
|
separate = null;
|
|
if ("true".equals(col.attr("x-line-before")))
|
|
col.removeAttr("x-line-before");
|
|
}
|
|
|
|
col.tagName("div");
|
|
}
|
|
|
|
if (merge.size() != 0)
|
|
throw new AssertionError("merge");
|
|
|
|
if (text_separators && view)
|
|
row.appendElement("hr")
|
|
.attr("x-block", "true")
|
|
.attr("x-dashed", "true");
|
|
}
|
|
}
|
|
|
|
// Fix dangling table elements
|
|
document.select("tr,th,td").tagName("div");
|
|
|
|
// Lists
|
|
for (Element e : document.select("ol,ul,blockquote")) {
|
|
Element parent = e.parent();
|
|
if (view) {
|
|
if ("blockquote".equals(e.tagName()) || parent == null ||
|
|
!("li".equals(parent.tagName()) ||
|
|
"ol".equals(parent.tagName()) ||
|
|
"ul".equals(parent.tagName()))) {
|
|
if (!"false".equals(e.attr("x-line-before")))
|
|
e.attr("x-line-before", "true");
|
|
if (!"false".equals(e.attr("x-line-after")))
|
|
e.attr("x-line-after", "true");
|
|
}
|
|
|
|
// Unflatten list for viewing
|
|
if ((parent != null && "li".equals(parent.tagName())) &&
|
|
("ol".equals(e.tagName()) || "ul".equals(e.tagName())))
|
|
e.attr("x-list-level", "false");
|
|
} else {
|
|
if (!BuildConfig.DEBUG) {
|
|
String style = e.attr("style");
|
|
e.attr("style",
|
|
mergeStyles(style, "margin-top:0;margin-bottom:0"));
|
|
|
|
int ltr = 0;
|
|
int rtl = 0;
|
|
for (Element li : e.children()) {
|
|
if ("rtl".equals(li.attr("dir")))
|
|
rtl++;
|
|
else
|
|
ltr++;
|
|
li.removeAttr("dir");
|
|
}
|
|
e.attr("dir", rtl > ltr ? "rtl" : "ltr");
|
|
}
|
|
|
|
// Flatten list for editor
|
|
if (parent != null && "li".equals(parent.tagName())) {
|
|
List<Node> children = parent.childNodes();
|
|
for (Node child : children) {
|
|
child.remove();
|
|
if (child instanceof Element &&
|
|
"ol".equals(child.nodeName()) || "ul".equals(child.nodeName()))
|
|
parent.before(child);
|
|
else
|
|
parent.before(parent.shallowClone().appendChild(child));
|
|
}
|
|
parent.remove();
|
|
}
|
|
}
|
|
}
|
|
|
|
// Images
|
|
// https://developer.mozilla.org/en-US/docs/Web/HTML/Element/img
|
|
for (Element img : document.select("img")) {
|
|
String alt = img.attr("alt");
|
|
String src = img.attr("src");
|
|
String tracking = img.attr("x-tracking");
|
|
boolean isInline = src.startsWith("cid:");
|
|
|
|
if (TextUtils.isEmpty(src)) {
|
|
Log.i("Removing empty image");
|
|
img.remove();
|
|
continue;
|
|
}
|
|
|
|
if (!show_images && !(inline_images && isInline) && !image_placeholders) {
|
|
Log.i("Removing placeholder");
|
|
img.removeAttr("src");
|
|
continue;
|
|
}
|
|
|
|
// Remove spacer, etc
|
|
if (!show_images && !(inline_images && isInline) &&
|
|
TextUtils.isEmpty(img.attr("x-tracking"))) {
|
|
Log.i("Removing small image");
|
|
Integer width = Helper.parseInt(img.attr("width").trim());
|
|
Integer height = Helper.parseInt(img.attr("height").trim());
|
|
if (width != null && height != null) {
|
|
if (width == 0 && height != 0)
|
|
width = height;
|
|
if (width != 0 && height == 0)
|
|
height = width;
|
|
}
|
|
if ((width != null && width <= SMALL_IMAGE_SIZE) ||
|
|
(height != null && height <= SMALL_IMAGE_SIZE)) {
|
|
img.remove();
|
|
continue;
|
|
}
|
|
}
|
|
|
|
if (alt.length() > MAX_ALT)
|
|
alt = alt.substring(0, MAX_ALT) + "…";
|
|
|
|
if (!show_images && !(inline_images && isInline))
|
|
if (TextUtils.isEmpty(tracking)) {
|
|
if (TextUtils.isEmpty(alt)) {
|
|
boolean linked = false;
|
|
Element p = img.parent();
|
|
while (p != null && !linked)
|
|
if ("a".equals(p.tagName())) {
|
|
String href = p.attr("href");
|
|
if (TextUtils.isEmpty(href))
|
|
break;
|
|
if (!TextUtils.isEmpty(p.text()))
|
|
break;
|
|
linked = true;
|
|
} else
|
|
p = p.parent();
|
|
if (linked)
|
|
alt = context.getString(R.string.title_image_link);
|
|
}
|
|
if (!TextUtils.isEmpty(alt)) {
|
|
Element span = document.createElement("span")
|
|
.text("[" + alt + "]")
|
|
.attr("x-font-size-abs", Integer.toString(textSizeSmall));
|
|
img.appendChild(span);
|
|
}
|
|
} else if (!TextUtils.isEmpty(alt)) {
|
|
Element a = document.createElement("a")
|
|
.attr("href", tracking)
|
|
.text("[" + alt + "]")
|
|
.attr("x-font-size-abs", Integer.toString(textSizeSmall));
|
|
img.appendChild(a);
|
|
}
|
|
}
|
|
|
|
// Selective new lines
|
|
for (Element div : document.select("div"))
|
|
div.tagName("span");
|
|
|
|
if (Build.VERSION.SDK_INT < Build.VERSION_CODES.N)
|
|
for (Element span : document.select("span"))
|
|
if (!TextUtils.isEmpty(span.attr("color")))
|
|
span.tagName("font");
|
|
|
|
if (document.body() == null) {
|
|
Log.e("Sanitize without body");
|
|
document.normalise();
|
|
}
|
|
|
|
return document;
|
|
}
|
|
|
|
static void removeRelativeLinks(Document document) {
|
|
// https://developer.mozilla.org/en-US/docs/Web/HTML/Element/base
|
|
Elements b = document.select("base");
|
|
String base = (b.size() > 0 ? b.get(0).attr("href") : null);
|
|
for (Element e : document.select("a,img")) {
|
|
String attr = ("a".equals(e.tagName()) ? "href" : "src");
|
|
String link = e.attr(attr);
|
|
|
|
if (!TextUtils.isEmpty(base))
|
|
try {
|
|
// https://developer.android.com/reference/java/net/URI
|
|
link = URI.create(base).resolve(link.replace(" ", "%20")).toString();
|
|
e.attr(attr, link);
|
|
} catch (Throwable ex) {
|
|
Log.w(ex);
|
|
}
|
|
|
|
if ("a".equals(e.tagName()) &&
|
|
link.trim().startsWith("#")) {
|
|
e.tagName("span");
|
|
e.removeAttr(attr);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void autoLink(Document document) {
|
|
autoLink(document, false);
|
|
}
|
|
|
|
static void autoLink(Document document, boolean outbound) {
|
|
// https://en.wikipedia.org/wiki/List_of_URI_schemes
|
|
// xmpp:[<user>]@<host>[:<port>]/[<resource>][?<query>]
|
|
// geo:<lat>,<lon>[,<alt>][;u=<uncertainty>]
|
|
// tel:<phonenumber>
|
|
final Pattern GPA_PATTERN = Pattern.compile("GPA\\.\\d{4}-\\d{4}-\\d{4}-\\d{5}");
|
|
final String BOUNDARY = "(?:\\b|$|^)";
|
|
final Pattern pattern = Pattern.compile(
|
|
"(" + BOUNDARY + "((?i:mailto):)?" + Helper.EMAIL_ADDRESS + "(\\?[^\\s]*)?" + BOUNDARY + ")" +
|
|
"|" +
|
|
PatternsCompat.AUTOLINK_WEB_URL.pattern()
|
|
.replace("(?i:http|https|rtsp)://",
|
|
"(((?i:http|https)://)|((?i:xmpp):))") +
|
|
"|" +
|
|
"(?i:geo:\\d+,\\d+(,\\d+)?(;u=\\d+)?)" +
|
|
"|" +
|
|
"(?i:tel:" + Patterns.PHONE.pattern() + ")" +
|
|
(BuildConfig.DEBUG ? "|(" + GPA_PATTERN + ")" : ""));
|
|
|
|
NodeTraversor.traverse(new NodeVisitor() {
|
|
private int links = 0;
|
|
|
|
@Override
|
|
public void head(Node node, int depth) {
|
|
if (links < MAX_AUTO_LINK && node instanceof TextNode) {
|
|
TextNode tnode = (TextNode) node;
|
|
String text = tnode.getWholeText();
|
|
|
|
if (BuildConfig.DEBUG && node.parentNode() instanceof Element) {
|
|
Element parent = (Element) node.parentNode();
|
|
if ("faircode_txn_id".equals(parent.className())) {
|
|
Element a = document.createElement("a");
|
|
a.attr("href", BuildConfig.TX_URI + text.trim());
|
|
a.text(text);
|
|
tnode.before(a);
|
|
tnode.text("");
|
|
return;
|
|
}
|
|
}
|
|
|
|
Matcher matcher = pattern.matcher(text);
|
|
if (matcher.find()) {
|
|
Element span = document.createElement("span");
|
|
|
|
int pos = 0;
|
|
do {
|
|
boolean linked = false;
|
|
Node parent = tnode.parent();
|
|
while (parent != null) {
|
|
if ("a".equals(parent.nodeName())) {
|
|
linked = true;
|
|
break;
|
|
}
|
|
parent = parent.parent();
|
|
}
|
|
|
|
String group = matcher.group();
|
|
int start = matcher.start();
|
|
int end = matcher.end();
|
|
|
|
// Workarounds
|
|
if (group.endsWith(".")) {
|
|
end--;
|
|
group = group.substring(0, group.length() - 1);
|
|
}
|
|
if (group.startsWith("(")) {
|
|
start++;
|
|
group = group.substring(1);
|
|
}
|
|
if (group.endsWith(")")) {
|
|
end--;
|
|
group = group.substring(0, group.length() - 1);
|
|
}
|
|
|
|
boolean email = group.contains("@") && !group.contains(":");
|
|
Log.i("Web url=" + group + " " + start + "..." + end + "/" + text.length() +
|
|
" linked=" + linked + " email=" + email + " count=" + links);
|
|
|
|
if (linked)
|
|
span.appendText(text.substring(pos, end));
|
|
else {
|
|
span.appendText(text.substring(pos, start));
|
|
|
|
Element a = document.createElement("a");
|
|
if (BuildConfig.DEBUG && GPA_PATTERN.matcher(group).matches())
|
|
a.attr("href", BuildConfig.GPA_URI + group);
|
|
else {
|
|
String url = (email ? "mailto:" : "") + group;
|
|
if (outbound)
|
|
try {
|
|
Uri uri = UriHelper.guessScheme(Uri.parse(url));
|
|
a.attr("href", uri.toString());
|
|
} catch (Throwable ex) {
|
|
Log.e(ex);
|
|
a.attr("href", url);
|
|
}
|
|
else
|
|
a.attr("href", url);
|
|
}
|
|
a.text(group);
|
|
span.appendChild(a);
|
|
|
|
links++;
|
|
}
|
|
|
|
pos = end;
|
|
} while (links < MAX_AUTO_LINK && matcher.find());
|
|
|
|
span.appendText(text.substring(pos));
|
|
|
|
tnode.before(span);
|
|
tnode.text("");
|
|
}
|
|
}
|
|
}
|
|
|
|
@Override
|
|
public void tail(Node node, int depth) {
|
|
}
|
|
}, document);
|
|
}
|
|
|
|
static void guessSchemes(Document document) {
|
|
for (Element e : document.select("a,img"))
|
|
try {
|
|
String attr = ("a".equals(e.tagName()) ? "href" : "src");
|
|
String url = e.attr(attr);
|
|
if (TextUtils.isEmpty(url))
|
|
continue;
|
|
Uri uri = UriHelper.guessScheme(Uri.parse(url));
|
|
e.attr(attr, uri.toString());
|
|
} catch (Throwable ex) {
|
|
Log.e(ex);
|
|
}
|
|
}
|
|
|
|
static void normalizeNamespaces(Document parsed, boolean display_hidden) {
|
|
// <html xmlns:v="urn:schemas-microsoft-com:vml"
|
|
// xmlns:o="urn:schemas-microsoft-com:office:office"
|
|
// xmlns:w="urn:schemas-microsoft-com:office:word"
|
|
// xmlns:m="http://schemas.microsoft.com/office/2004/12/omml"
|
|
// xmlns="http://www.w3.org/TR/REC-html40">
|
|
|
|
// <o:p> </o:p></span>
|
|
// <w:Sdt DocPart="0C3EDB8F875B40C899499DE56A431990" ...
|
|
|
|
// Default XHTML namespace: http://www.w3.org/1999/xhtml
|
|
// https://developer.mozilla.org/en-US/docs/Related/IMSC/Namespaces
|
|
|
|
String ns = null;
|
|
for (Element h : parsed.select("html"))
|
|
for (Attribute a : h.attributes()) {
|
|
String key = a.getKey();
|
|
String value = a.getValue().toLowerCase(Locale.ROOT);
|
|
if ("xmlns".equals(key) && value.contains(W3NS)) {
|
|
ns = key;
|
|
break;
|
|
} else if (key.startsWith("xmlns:") && value.contains(W3NS)) {
|
|
ns = key.split(":")[1];
|
|
break;
|
|
}
|
|
}
|
|
|
|
for (Element e : parsed.select("*")) {
|
|
String tag = e.tagName();
|
|
if (tag.contains(":")) {
|
|
boolean show = (ns == null || tag.startsWith(ns) ||
|
|
tag.startsWith("html:") || tag.startsWith("body:") || tag.startsWith("w:"));
|
|
if (display_hidden || show) {
|
|
String[] nstag = tag.split(":");
|
|
String t = nstag[nstag.length > 1 ? 1 : 0];
|
|
if (!TextUtils.isEmpty(t)) {
|
|
e.tagName(t);
|
|
Log.i("Updated tag=" + tag + " to=" + t);
|
|
}
|
|
|
|
if (!show) {
|
|
String style = e.attr("style");
|
|
e.attr("style", mergeStyles(style, "text-decoration:line-through;"));
|
|
}
|
|
} else {
|
|
e.remove();
|
|
Log.i("Removed tag=" + tag + " ns=" + ns + " content=" + e.text());
|
|
}
|
|
} else if (!"html".equals(tag) && !"body".equals(tag) && !"w".equals(tag)) {
|
|
String xmlns = e.attr("xmlns").toLowerCase(Locale.ROOT);
|
|
if (!TextUtils.isEmpty(xmlns) && !xmlns.contains(W3NS)) {
|
|
if (display_hidden) {
|
|
String style = e.attr("style");
|
|
e.attr("style", mergeStyles(style, "text-decoration:line-through;"));
|
|
} else {
|
|
e.remove();
|
|
Log.i("Removed tag=" + tag + " ns=" + ns + " xmlns=" + xmlns + " content=" + e.text());
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static List<CSSStyleSheet> parseStyles(Elements styles) {
|
|
List<CSSStyleSheet> sheets = new ArrayList<>();
|
|
for (Element style : styles) {
|
|
if (BuildConfig.DEBUG)
|
|
Log.i("Style=" + style.data());
|
|
try {
|
|
InputSource source = new InputSource(new StringReader(style.data()));
|
|
String media = style.attr("media");
|
|
if (!TextUtils.isEmpty(media))
|
|
source.setMedia(media);
|
|
|
|
CSSOMParser parser = new CSSOMParser(new SACParserCSS3());
|
|
parser.setErrorHandler(new ErrorHandler() {
|
|
@Override
|
|
public void warning(CSSParseException ex) throws CSSException {
|
|
Log.i("CSS warning=" + ex.getMessage());
|
|
}
|
|
|
|
@Override
|
|
public void error(CSSParseException ex) throws CSSException {
|
|
Log.i("CSS error=" + ex.getMessage());
|
|
}
|
|
|
|
@Override
|
|
public void fatalError(CSSParseException ex) throws CSSException {
|
|
Log.w(ex);
|
|
}
|
|
});
|
|
|
|
long start = new Date().getTime();
|
|
sheets.add(parser.parseStyleSheet(source, null, null));
|
|
long elapsed = new Date().getTime() - start;
|
|
Log.i("Style parse=" + elapsed + " ms");
|
|
} catch (Throwable ex) {
|
|
Log.w(ex);
|
|
}
|
|
}
|
|
return sheets;
|
|
}
|
|
|
|
static String processStyles(String tag, String clazz, String style, List<CSSStyleSheet> sheets) {
|
|
for (CSSStyleSheet sheet : sheets)
|
|
if (isScreenMedia(sheet.getMedia())) {
|
|
style = processStyles(null, clazz, style, sheet.getCssRules(), Selector.SAC_ELEMENT_NODE_SELECTOR);
|
|
style = processStyles(tag, clazz, style, sheet.getCssRules(), Selector.SAC_ELEMENT_NODE_SELECTOR);
|
|
style = processStyles(tag, clazz, style, sheet.getCssRules(), Selector.SAC_CONDITIONAL_SELECTOR);
|
|
}
|
|
return style;
|
|
}
|
|
|
|
private static String processStyles(String tag, String clazz, String style, CSSRuleList rules, int stype) {
|
|
for (int i = 0; rules != null && i < rules.getLength(); i++) {
|
|
CSSRule rule = rules.item(i);
|
|
switch (rule.getType()) {
|
|
case CSSRule.STYLE_RULE:
|
|
CSSStyleRuleImpl srule = (CSSStyleRuleImpl) rule;
|
|
for (int j = 0; j < srule.getSelectors().getLength(); j++) {
|
|
Selector selector = srule.getSelectors().item(j);
|
|
if (selector.getSelectorType() != stype)
|
|
continue;
|
|
switch (selector.getSelectorType()) {
|
|
case Selector.SAC_ELEMENT_NODE_SELECTOR:
|
|
ElementSelectorImpl eselector = (ElementSelectorImpl) selector;
|
|
if (tag == null
|
|
? eselector.getLocalName() == null
|
|
: tag.equals(eselector.getLocalName()))
|
|
style = mergeStyles(style, srule.getStyle().getCssText());
|
|
break;
|
|
case Selector.SAC_CONDITIONAL_SELECTOR:
|
|
ConditionalSelectorImpl cselector = (ConditionalSelectorImpl) selector;
|
|
if (cselector.getCondition().getConditionType() == SAC_CLASS_CONDITION) {
|
|
ClassConditionImpl ccondition = (ClassConditionImpl) cselector.getCondition();
|
|
if (clazz.equals(ccondition.getValue()))
|
|
style = mergeStyles(style, srule.getStyle().getCssText());
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
break;
|
|
|
|
case CSSRule.MEDIA_RULE:
|
|
CSSMediaRuleImpl mrule = (CSSMediaRuleImpl) rule;
|
|
if (isScreenMedia(mrule.getMedia()))
|
|
style = processStyles(tag, clazz, style, mrule.getCssRules(), stype);
|
|
break;
|
|
}
|
|
}
|
|
return style;
|
|
}
|
|
|
|
private static boolean isScreenMedia(MediaList media) {
|
|
// https://developer.mozilla.org/en-US/docs/Web/CSS/Media_Queries/Using_media_queries
|
|
// https://developers.google.com/gmail/design/reference/supported_css#supported_types
|
|
if (media instanceof MediaListImpl) {
|
|
MediaListImpl _media = (MediaListImpl) media;
|
|
for (int i = 0; i < _media.getLength(); i++) {
|
|
String query = _media.mediaQuery(i).getCssText(null);
|
|
if ("all".equals(query) ||
|
|
"screen".equals(query) || "only screen".equals(query))
|
|
return true;
|
|
}
|
|
} else
|
|
Log.e("Media class=" + media.getClass().getName());
|
|
return false;
|
|
}
|
|
|
|
static String mergeStyles(String base, String style) {
|
|
return mergeStyles(base, style, false);
|
|
}
|
|
|
|
static String mergeElementStyles(String base, String style) {
|
|
return mergeStyles(base, style, true);
|
|
}
|
|
|
|
private static String mergeStyles(String base, String style, boolean element) {
|
|
Map<String, String> result = new HashMap<>();
|
|
|
|
// Base style
|
|
Map<String, String> baseParams = new HashMap<>();
|
|
if (!TextUtils.isEmpty(base))
|
|
for (String param : base.split(";")) {
|
|
int colon = param.indexOf(':');
|
|
if (colon < 0) {
|
|
Log.w("CSS invalid=" + param);
|
|
continue;
|
|
}
|
|
|
|
String key = param.substring(0, colon).trim().toLowerCase(Locale.ROOT);
|
|
baseParams.put(key, param);
|
|
}
|
|
|
|
// Element style
|
|
if (!TextUtils.isEmpty(style))
|
|
for (String param : style.split(";")) {
|
|
int colon = param.indexOf(':');
|
|
if (colon < 0) {
|
|
Log.w("CSS invalid=" + param);
|
|
continue;
|
|
}
|
|
|
|
String key = param.substring(0, colon).trim().toLowerCase(Locale.ROOT);
|
|
String value = param.substring(colon + 1).trim().toUpperCase(Locale.ROOT);
|
|
|
|
//https://developer.mozilla.org/en-US/docs/Learn/CSS/Building_blocks/Cascade_and_inheritance#controlling_inheritance
|
|
boolean initial = false; // no value
|
|
boolean inherit = false; // parent value
|
|
if (element)
|
|
switch (value) {
|
|
case "inherit":
|
|
inherit = true;
|
|
break;
|
|
case "initial":
|
|
initial = true;
|
|
break;
|
|
case "unset":
|
|
case "revert":
|
|
inherit = !STYLE_NO_INHERIT.contains(key);
|
|
break;
|
|
}
|
|
|
|
if (initial || inherit)
|
|
Log.i("CSS " + value + "=" + key);
|
|
|
|
if (inherit) {
|
|
param = baseParams.get(key);
|
|
if (param != null)
|
|
result.put(key, param);
|
|
} else if (!initial)
|
|
result.put(key, param);
|
|
|
|
baseParams.remove(key);
|
|
}
|
|
|
|
for (String key : baseParams.keySet())
|
|
if (!STYLE_NO_INHERIT.contains(key))
|
|
result.put(key, baseParams.get(key));
|
|
|
|
return TextUtils.join(";", result.values());
|
|
}
|
|
|
|
private static Integer getFontWeight(String value) {
|
|
// https://developer.mozilla.org/en-US/docs/Web/CSS/font-weight
|
|
if (TextUtils.isEmpty(value))
|
|
return null;
|
|
|
|
value = value.toLowerCase(Locale.ROOT).trim();
|
|
|
|
switch (value) {
|
|
case "thin":
|
|
return 100;
|
|
case "light":
|
|
case "lighter":
|
|
return 300;
|
|
case "normal":
|
|
case "regular":
|
|
return 400;
|
|
case "bolder":
|
|
case "strong":
|
|
return 600;
|
|
case "bold":
|
|
return 700;
|
|
case "heavy":
|
|
return 900;
|
|
case "none":
|
|
case "auto":
|
|
case "unset":
|
|
case "initial":
|
|
case "inherit":
|
|
return null;
|
|
}
|
|
|
|
try {
|
|
return Integer.parseInt(value);
|
|
} catch (NumberFormatException ex) {
|
|
Log.i(ex);
|
|
}
|
|
|
|
return null;
|
|
}
|
|
|
|
private static Float getFontSize(String value, float current) {
|
|
// https://developer.mozilla.org/en-US/docs/Web/CSS/font-size
|
|
if (TextUtils.isEmpty(value))
|
|
return null;
|
|
|
|
if (value.contains("calc") ||
|
|
"none".equals(value) ||
|
|
"auto".equals(value) ||
|
|
"unset".equals(value) ||
|
|
"initial".equals(value) ||
|
|
"inherit".equals(value))
|
|
return null;
|
|
|
|
// Absolute
|
|
switch (value) {
|
|
case "xx-small":
|
|
case "x-small":
|
|
return FONT_XSMALL;
|
|
case "small":
|
|
return FONT_SMALL;
|
|
case "medium":
|
|
return 1.0f;
|
|
case "large":
|
|
return FONT_LARGE;
|
|
case "x-large":
|
|
case "xx-large":
|
|
case "xxx-large":
|
|
return FONT_XLARGE;
|
|
}
|
|
|
|
// Relative
|
|
switch (value) {
|
|
case "smaller":
|
|
return FONT_SMALL * current;
|
|
case "larger":
|
|
return FONT_LARGE * current;
|
|
}
|
|
|
|
try {
|
|
if (value.endsWith("%"))
|
|
return Float.parseFloat(value.substring(0, value.length() - 1).trim()) / 100 * current;
|
|
if (value.endsWith("rem"))
|
|
return Float.parseFloat(value.substring(0, value.length() - 3).trim());
|
|
if (value.endsWith("em"))
|
|
return Float.parseFloat(value.substring(0, value.length() - 2).trim()) * current;
|
|
if (value.endsWith("ex")) // 1 ex = 0.5 em
|
|
return Float.parseFloat(value.substring(0, value.length() - 2).trim()) / 2 * current;
|
|
if (value.endsWith("pt"))
|
|
return Float.parseFloat(value.substring(0, value.length() - 2).trim()) / DEFAULT_FONT_SIZE_PT;
|
|
if (value.endsWith("px"))
|
|
return Float.parseFloat(value.substring(0, value.length() - 2).trim()) / DEFAULT_FONT_SIZE;
|
|
|
|
// https://www.w3.org/Style/Examples/007/units.en.html
|
|
if (value.endsWith("pc")) // 6 pc = 72 pt
|
|
return Float.parseFloat(value.substring(0, value.length() - 2).trim()) / 12 / DEFAULT_FONT_SIZE_PT;
|
|
if (value.endsWith("cm")) // 1 inch = 2.54 cm
|
|
return Float.parseFloat(value.substring(0, value.length() - 2).trim()) / 2.54f * 72 / DEFAULT_FONT_SIZE_PT;
|
|
if (value.endsWith("mm")) // 1 inch = 25.4 mm
|
|
return Float.parseFloat(value.substring(0, value.length() - 2).trim()) / 25.4f * 72 / DEFAULT_FONT_SIZE_PT;
|
|
if (value.endsWith("in")) // 1 inch = 72pt
|
|
return Float.parseFloat(value.substring(0, value.length() - 2).trim()) * 72 / DEFAULT_FONT_SIZE_PT;
|
|
return Float.parseFloat(value.trim()) / DEFAULT_FONT_SIZE;
|
|
} catch (NumberFormatException ex) {
|
|
Log.i(ex);
|
|
return null;
|
|
}
|
|
}
|
|
|
|
private static Integer parseColor(String value) {
|
|
if (TextUtils.isEmpty(value))
|
|
return null;
|
|
|
|
if ("transparent".equals(value))
|
|
return Color.TRANSPARENT;
|
|
|
|
// https://developer.mozilla.org/en-US/docs/Web/CSS/color_value
|
|
String c = value
|
|
.replace("null", "")
|
|
.replace("none", "")
|
|
.replace("unset", "")
|
|
.replace("auto", "")
|
|
.replace("inherit", "")
|
|
.replace("initial", "")
|
|
.replace("windowtext", "")
|
|
.replace("currentcolor", "")
|
|
.replace("transparent", "")
|
|
.replaceAll("[^a-z0-9(),.%#]", "")
|
|
.replaceAll("#+", "#");
|
|
|
|
Integer color = null;
|
|
boolean hasAlpha = false;
|
|
try {
|
|
if (TextUtils.isEmpty(c))
|
|
return null;
|
|
else if (c.startsWith("#")) {
|
|
if (c.length() > 1) {
|
|
String code = c.substring(1);
|
|
if (x11ColorMap.containsKey(code)) // workaround
|
|
color = x11ColorMap.get(code);
|
|
else {
|
|
color = parseWebColor(c);
|
|
hasAlpha = true;
|
|
}
|
|
}
|
|
} else if (c.startsWith("rgb") || c.startsWith("hsl")) {
|
|
int s = c.indexOf("(");
|
|
int e = c.indexOf(")");
|
|
if (s > 0 && e > s) {
|
|
String[] component = c.substring(s + 1, e).split(",");
|
|
|
|
for (int i = 0; i < component.length; i++)
|
|
if (component[i].endsWith("%"))
|
|
if (c.startsWith("rgb")) {
|
|
int percent = Integer.parseInt(component[i].replace("%", ""));
|
|
component[i] = Integer.toString(Math.round(255 * (percent / 100f)));
|
|
} else
|
|
component[i] = component[i].replace("%", "");
|
|
|
|
if (c.startsWith("rgb") && component.length >= 3)
|
|
color = Color.rgb(
|
|
Integer.parseInt(component[0]),
|
|
Integer.parseInt(component[1]),
|
|
Integer.parseInt(component[2]));
|
|
else if (c.startsWith("hsl") && component.length >= 3)
|
|
color = ColorUtils.HSLToColor(new float[]{
|
|
Float.parseFloat(component[0]),
|
|
Integer.parseInt(component[1]) / 100f,
|
|
Integer.parseInt(component[2]) / 100f});
|
|
|
|
if (color != null && component.length >= 4) {
|
|
int alpha = Math.round(Float.parseFloat(component[3]) * 255);
|
|
color = ColorUtils.setAlphaComponent(color, alpha);
|
|
hasAlpha = true;
|
|
}
|
|
}
|
|
} else if (x11ColorMap.containsKey(c))
|
|
color = x11ColorMap.get(c);
|
|
else {
|
|
color = parseWebColor(c);
|
|
hasAlpha = true;
|
|
}
|
|
|
|
if (color != null && !hasAlpha)
|
|
color = ColorUtils.setAlphaComponent(color, 255);
|
|
|
|
if (BuildConfig.DEBUG)
|
|
Log.i("Color " + c + "=" + (color == null ? null : encodeWebColor(color)));
|
|
|
|
} catch (Throwable ex) {
|
|
Log.i("Color=" + c + ": " + ex);
|
|
}
|
|
|
|
return color;
|
|
}
|
|
|
|
private static int parseWebColor(@NonNull String value) {
|
|
if (value.startsWith("#"))
|
|
value = value.substring(1);
|
|
|
|
if (value.length() == 3)
|
|
value = "FF" +
|
|
value.charAt(0) + value.charAt(0) +
|
|
value.charAt(1) + value.charAt(1) +
|
|
value.charAt(2) + value.charAt(2);
|
|
else if (value.length() == 6)
|
|
value = "FF" + value;
|
|
else if (value.length() == 8)
|
|
value = value.substring(6, 8) + value.substring(0, 6);
|
|
else
|
|
throw new IllegalArgumentException("Unknown color=" + value);
|
|
|
|
return (int) Long.parseLong(value, 16);
|
|
}
|
|
|
|
static String encodeWebColor(int color) {
|
|
int alpha = Color.alpha(color);
|
|
int rgb = 0xFFFFFF & color;
|
|
if (alpha == 255)
|
|
return String.format("#%06X", rgb);
|
|
else
|
|
return String.format("#%06X%02X", rgb, alpha);
|
|
}
|
|
|
|
private static Integer adjustColor(boolean dark, int textColorPrimary, Integer color) {
|
|
// Special case:
|
|
// shades of gray
|
|
int r = Color.red(color);
|
|
int g = Color.green(color);
|
|
int b = Color.blue(color);
|
|
float a = Color.alpha(color) / 255f;
|
|
if (r == g && r == b && (dark ? 255 - r : r) * a < GRAY_THRESHOLD)
|
|
color = textColorPrimary;
|
|
|
|
return adjustLuminance(color, dark, MIN_LUMINANCE_VIEW);
|
|
}
|
|
|
|
static int adjustLuminance(int color, boolean dark, float min) {
|
|
int c = ColorUtils.compositeColors(color, dark ? Color.BLACK : Color.WHITE);
|
|
float lum = (float) ColorUtils.calculateLuminance(c);
|
|
if (dark ? lum < min : lum > 1 - min)
|
|
color = ColorUtils.blendARGB(color,
|
|
dark ? Color.WHITE : Color.BLACK,
|
|
dark ? min - lum : lum - (1 - min));
|
|
return color;
|
|
}
|
|
|
|
private static boolean hasColor(int color) {
|
|
int r = Color.red(color);
|
|
int g = Color.green(color);
|
|
int b = Color.blue(color);
|
|
return (Math.abs(r - g) >= COLOR_THRESHOLD ||
|
|
Math.abs(r - b) >= COLOR_THRESHOLD);
|
|
}
|
|
|
|
// https://tools.ietf.org/html/rfc3676
|
|
static String flow(String text, boolean delsp) {
|
|
boolean inquote = false;
|
|
boolean continuation = false;
|
|
StringBuilder flowed = new StringBuilder();
|
|
String[] lines = text.split("\\r?\\n");
|
|
for (int l = 0; l < lines.length; l++) {
|
|
String line = lines[l];
|
|
lines[l] = null;
|
|
|
|
if (delsp && line.endsWith(" "))
|
|
line = line.substring(0, line.length() - 1);
|
|
|
|
boolean q = line.startsWith(">");
|
|
if (q != inquote) {
|
|
int len = flowed.length();
|
|
if (len > 0 && flowed.charAt(len - 1) != '\n')
|
|
flowed.append("\n");
|
|
continuation = false;
|
|
}
|
|
inquote = q;
|
|
|
|
if (continuation)
|
|
while (line.startsWith(">")) {
|
|
line = line.substring(1);
|
|
if (line.startsWith(" "))
|
|
line = line.substring(1);
|
|
}
|
|
|
|
continuation = (line.endsWith(" ") && !"-- ".equals(line));
|
|
|
|
flowed.append(line);
|
|
|
|
if (!continuation)
|
|
flowed.append("\n");
|
|
}
|
|
|
|
return flowed.toString();
|
|
}
|
|
|
|
static String formatPlainText(String text) {
|
|
return formatPlainText(text, true);
|
|
}
|
|
|
|
static String formatPlainText(String text, boolean view) {
|
|
int level = 0;
|
|
StringBuilder sb = new StringBuilder();
|
|
String[] lines = text
|
|
.replaceAll("\\r(?!\\n)", "\n")
|
|
.split("\\r?\\n");
|
|
for (int l = 0; l < lines.length; l++) {
|
|
String line = lines[l];
|
|
lines[l] = null;
|
|
|
|
// Opening quotes
|
|
// https://tools.ietf.org/html/rfc3676#section-4.5
|
|
if (view) {
|
|
int tlevel = 0;
|
|
while (line.startsWith(">")) {
|
|
tlevel++;
|
|
if (tlevel > level)
|
|
sb.append("<blockquote style=\"")
|
|
.append(getQuoteStyle(line, 0, line.length()))
|
|
.append("\">");
|
|
|
|
line = line.substring(1); // >
|
|
|
|
if (line.startsWith(" >"))
|
|
line = line.substring(1);
|
|
}
|
|
if (tlevel > 0)
|
|
if (line.length() > 0 && line.charAt(0) == ' ')
|
|
line = line.substring(1);
|
|
|
|
// Closing quotes
|
|
for (int i = 0; i < level - tlevel; i++)
|
|
sb.append("</blockquote>");
|
|
level = tlevel;
|
|
}
|
|
|
|
// Tabs characters
|
|
StringBuilder sbl = new StringBuilder();
|
|
for (int j = 0; j < line.length(); j++) {
|
|
char kar = line.charAt(j);
|
|
if (kar == '\t') {
|
|
sbl.append(' ');
|
|
while (sbl.length() % TAB_SIZE != 0)
|
|
sbl.append(' ');
|
|
} else
|
|
sbl.append(kar);
|
|
}
|
|
line = sbl.toString();
|
|
|
|
// Html characters
|
|
// This will handle spaces / word wrapping as well
|
|
line = Html.escapeHtml(line);
|
|
|
|
sb.append(line);
|
|
if (view ||
|
|
l + 1 < lines.length ||
|
|
text.endsWith("\n"))
|
|
sb.append("<br>");
|
|
}
|
|
|
|
// Closing quotes
|
|
for (int i = 0; i < level; i++)
|
|
sb.append("</blockquote>");
|
|
|
|
return sb.toString();
|
|
}
|
|
|
|
static void restorePre(Document document) {
|
|
document.select("div[x-plain=true]")
|
|
.tagName("pre")
|
|
.removeAttr("x-plain");
|
|
}
|
|
|
|
static void removeTrackingPixels(Context context, Document document) {
|
|
SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
|
|
boolean disconnect_images = (prefs.getBoolean("disconnect_images", false) && BuildConfig.DEBUG);
|
|
|
|
Drawable d = ContextCompat.getDrawable(context, R.drawable.twotone_my_location_24);
|
|
d.setTint(Helper.resolveColor(context, R.attr.colorWarning));
|
|
|
|
Bitmap bm = Bitmap.createBitmap(d.getIntrinsicWidth(), d.getIntrinsicHeight(), Bitmap.Config.ARGB_8888);
|
|
Canvas c = new Canvas(bm);
|
|
d.setBounds(0, 0, c.getWidth(), c.getHeight());
|
|
d.draw(c);
|
|
|
|
ByteArrayOutputStream bos = new ByteArrayOutputStream();
|
|
bm.compress(Bitmap.CompressFormat.PNG, 100, bos);
|
|
|
|
StringBuilder sb = new StringBuilder();
|
|
sb.append("data:image/png;base64,");
|
|
sb.append(Base64.encodeToString(bos.toByteArray(), Base64.NO_WRAP));
|
|
|
|
// Build list of allowed hosts
|
|
List<String> hosts = new ArrayList<>();
|
|
for (Element img : document.select("img")) {
|
|
String src = img.attr("src");
|
|
if (!TextUtils.isEmpty(src) && !isTrackingPixel(img)) {
|
|
Uri uri = Uri.parse(img.attr("src"));
|
|
String host = uri.getHost();
|
|
if (host != null && !hosts.contains(host) &&
|
|
!isTrackingHost(host, disconnect_images))
|
|
hosts.add(host);
|
|
}
|
|
}
|
|
|
|
// Images
|
|
for (Element img : document.select("img")) {
|
|
img.removeAttr("x-tracking");
|
|
|
|
String src = img.attr("src");
|
|
if (TextUtils.isEmpty(src))
|
|
continue;
|
|
|
|
Uri uri = Uri.parse(src);
|
|
String host = uri.getHost();
|
|
if (host == null || hosts.contains(host))
|
|
continue;
|
|
|
|
if (isTrackingPixel(img) || isTrackingHost(host, disconnect_images)) {
|
|
img.attr("src", sb.toString());
|
|
img.attr("alt", context.getString(R.string.title_legend_tracking_pixel));
|
|
img.attr("height", "24");
|
|
img.attr("width", "24");
|
|
img.attr("style", "display:block !important; width:24px !important; height:24px !important;");
|
|
img.attr("x-tracking", src);
|
|
}
|
|
}
|
|
}
|
|
|
|
private static boolean isTrackingPixel(Element img) {
|
|
// Newton mail
|
|
if ("cloudmagic-smart-beacon".equals(img.className()))
|
|
return true;
|
|
|
|
String width = img.attr("width").trim();
|
|
String height = img.attr("height").trim();
|
|
|
|
if (TextUtils.isEmpty(width) || TextUtils.isEmpty(height))
|
|
return false;
|
|
|
|
try {
|
|
int w = Integer.parseInt(width);
|
|
int h = Integer.parseInt(height);
|
|
if (w == 0 && h != 0)
|
|
w = h;
|
|
if (w != 0 && h == 0)
|
|
h = w;
|
|
return (w * h <= TRACKING_PIXEL_SURFACE);
|
|
} catch (NumberFormatException ignored) {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
private static boolean isTrackingHost(String host, boolean disconnect_images) {
|
|
if (TRACKING_HOSTS.contains(host))
|
|
return true;
|
|
if (disconnect_images && DisconnectBlacklist.isTracking(host))
|
|
return true;
|
|
return false;
|
|
}
|
|
|
|
static void embedInlineImages(Context context, long id, Document document, boolean local) throws IOException {
|
|
DB db = DB.getInstance(context);
|
|
for (Element img : document.select("img")) {
|
|
String src = img.attr("src");
|
|
if (src.startsWith("cid:")) {
|
|
String cid = '<' + src.substring(4) + '>';
|
|
EntityAttachment attachment = db.attachment().getAttachment(id, cid);
|
|
if (attachment != null && attachment.available) {
|
|
File file = attachment.getFile(context);
|
|
if (local) {
|
|
Uri uri = FileProvider.getUriForFile(context, BuildConfig.APPLICATION_ID, file);
|
|
img.attr("src", uri.toString());
|
|
Log.i("Inline image uri=" + uri);
|
|
} else {
|
|
try (InputStream is = new FileInputStream(file)) {
|
|
byte[] bytes = new byte[(int) file.length()];
|
|
if (is.read(bytes) != bytes.length)
|
|
throw new IOException("length");
|
|
|
|
StringBuilder sb = new StringBuilder();
|
|
sb.append("data:");
|
|
sb.append(attachment.type);
|
|
sb.append(";base64,");
|
|
sb.append(Base64.encodeToString(bytes, Base64.NO_WRAP));
|
|
|
|
img.attr("src", sb.toString());
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static void setViewport(Document document, boolean overview) {
|
|
// https://developer.mozilla.org/en-US/docs/Mozilla/Mobile/Viewport_meta_tag
|
|
// https://drafts.csswg.org/css-device-adapt/#viewport-meta
|
|
Elements meta = document.select("meta").select("[name=viewport]");
|
|
// Note that the browser will recognize meta elements in the body too
|
|
if (overview) {
|
|
// fit width
|
|
meta.remove();
|
|
document.head().prependElement("meta")
|
|
.attr("name", "viewport")
|
|
.attr("content", "width=device-width");
|
|
} else {
|
|
if (meta.size() == 1) {
|
|
String content = meta.attr("content");
|
|
String[] param = content.split("[;,]");
|
|
for (int i = 0; i < param.length; i++) {
|
|
String[] kv = param[i].split("=");
|
|
if (kv.length == 2) {
|
|
String key = kv[0]
|
|
.replaceAll("\\s+", "")
|
|
.toLowerCase(Locale.ROOT);
|
|
switch (key) {
|
|
case "user-scalable":
|
|
kv[1] = "yes";
|
|
param[i] = TextUtils.join("=", kv);
|
|
break;
|
|
case "minimum-scale":
|
|
case "maximum-scale":
|
|
kv[0] = "disabled-scaling";
|
|
param[i] = TextUtils.join("=", kv);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
meta.attr("content", TextUtils.join(",", param));
|
|
} else {
|
|
meta.remove();
|
|
document.head().prependElement("meta")
|
|
.attr("name", "viewport")
|
|
.attr("content", "width=device-width, initial-scale=1.0");
|
|
}
|
|
}
|
|
|
|
if (BuildConfig.DEBUG)
|
|
Log.i(document.head().html());
|
|
}
|
|
|
|
static void overrideWidth(Document document) {
|
|
List<String> tags = new ArrayList<>();
|
|
for (Element e : document.select("*")) {
|
|
String tag = e.tagName();
|
|
if ("img".equals(tag))
|
|
continue;
|
|
if (tags.contains(tag))
|
|
continue;
|
|
tags.add(tag);
|
|
}
|
|
|
|
StringBuilder sb = new StringBuilder();
|
|
sb.append("<style type=\"text/css\">");
|
|
for (String tag : tags)
|
|
sb.append(tag).append("{width: auto !important; min-width: 0 !important; max-width: 100% !important; overflow: auto !important;}");
|
|
sb.append("</style>");
|
|
|
|
document.select("head").append(sb.toString());
|
|
}
|
|
|
|
static boolean hasColorScheme(Document document, String name) {
|
|
List<CSSStyleSheet> sheets = parseStyles(document.head().select("style"));
|
|
for (CSSStyleSheet sheet : sheets)
|
|
if (sheet.getCssRules() != null) {
|
|
for (int i = 0; i < sheet.getCssRules().getLength(); i++) {
|
|
CSSRule rule = sheet.getCssRules().item(i);
|
|
if (rule instanceof CSSMediaRuleImpl) {
|
|
MediaList list = ((CSSMediaRuleImpl) rule).getMedia();
|
|
String media = (list == null ? null : list.getMediaText());
|
|
if (media != null &&
|
|
media.toLowerCase(Locale.ROOT).contains("prefers-color-scheme") &&
|
|
media.toLowerCase(Locale.ROOT).contains(name)) {
|
|
Log.i("@media=" + media);
|
|
return true;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
static void fakeDark(Document document) {
|
|
// https://issuetracker.google.com/issues/237785596
|
|
// https://developer.mozilla.org/en-US/docs/Web/CSS/filter-function/invert
|
|
// https://developer.mozilla.org/en-US/docs/Web/CSS/filter-function/hue-rotate
|
|
// https://developer.mozilla.org/en-US/docs/Web/CSS/@media/prefers-color-scheme
|
|
// https://developer.android.com/reference/android/webkit/WebSettings#setAlgorithmicDarkeningAllowed(boolean)
|
|
|
|
if (true || hasColorScheme(document, "dark"))
|
|
return;
|
|
|
|
document.head().appendElement("style").html(
|
|
"body { filter: invert(100%) hue-rotate(180deg) !important; background: black !important; }" +
|
|
"img { filter: invert(100%) hue-rotate(180deg) !important; }");
|
|
}
|
|
|
|
static String getLanguage(Context context, String subject, String text) {
|
|
try {
|
|
SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
|
|
boolean language_detection = prefs.getBoolean("language_detection", false);
|
|
if (!language_detection)
|
|
return null;
|
|
|
|
StringBuilder sb = new StringBuilder();
|
|
if (!TextUtils.isEmpty(subject))
|
|
sb.append(subject).append('\n');
|
|
if (!TextUtils.isEmpty(text))
|
|
sb.append(text);
|
|
if (sb.length() == 0)
|
|
return null;
|
|
|
|
Locale locale = TextHelper.detectLanguage(context, sb.toString());
|
|
return (locale == null ? null : locale.getLanguage());
|
|
} catch (Throwable ex) {
|
|
Log.e(ex);
|
|
return null;
|
|
}
|
|
}
|
|
|
|
static String getPreview(String text) {
|
|
if (text == null)
|
|
return null;
|
|
|
|
String preview = text
|
|
.replace("\u200C", "") // Zero-width non-joiner
|
|
.replaceAll("\\s+", " ");
|
|
return truncate(preview, PREVIEW_SIZE);
|
|
}
|
|
|
|
static String getFullText(String body) {
|
|
try {
|
|
if (body == null)
|
|
return null;
|
|
Document d = JsoupEx.parse(body);
|
|
return _getText(d);
|
|
} catch (OutOfMemoryError ex) {
|
|
Log.e(ex);
|
|
return null;
|
|
}
|
|
}
|
|
|
|
static String getFullText(File file) throws IOException {
|
|
try {
|
|
Document d = JsoupEx.parse(file);
|
|
return _getText(d);
|
|
} catch (OutOfMemoryError ex) {
|
|
Log.e(ex);
|
|
return null;
|
|
}
|
|
}
|
|
|
|
private static String _getText(Document d) {
|
|
truncate(d, MAX_FULL_TEXT_SIZE);
|
|
|
|
for (Element bq : d.select("blockquote"))
|
|
bq.prependChild(new TextNode("> "));
|
|
|
|
return d.body().text();
|
|
}
|
|
|
|
static String getQuoteStyle(Element e) {
|
|
CharSequence text = e.text();
|
|
return getQuoteStyle(text, 0, text.length());
|
|
}
|
|
|
|
static String getQuoteStyle(CharSequence quoted, int start, int end) {
|
|
String dir = "left";
|
|
try {
|
|
int count = end - start;
|
|
if (TextDirectionHeuristics.FIRSTSTRONG_LTR.isRtl(quoted, start, count))
|
|
dir = "right";
|
|
} catch (Throwable ex) {
|
|
Log.e(new Throwable("getQuoteStyle " + start + "..." + end, ex));
|
|
}
|
|
return "border-" + dir + ":3px solid #ccc; padding-" + dir + ":10px;margin:0;";
|
|
}
|
|
|
|
static String getIndentStyle(CharSequence quoted, int start, int end) {
|
|
return "margin-top:0; margin-bottom:0;";
|
|
}
|
|
|
|
static boolean hasBorder(Element e) {
|
|
if ("true".equals(e.attr("x-border")))
|
|
return true;
|
|
|
|
// https://groups.google.com/g/mozilla.support.thunderbird/c/rwLNk3MU3Gs?pli=1
|
|
if ("cite".equals(e.attr("type")))
|
|
return true;
|
|
|
|
String style = e.attr("style");
|
|
String[] params = style.split(";");
|
|
for (String param : params) {
|
|
int colon = param.indexOf(':');
|
|
if (colon < 0)
|
|
continue;
|
|
String key = param.substring(0, colon).trim().toLowerCase(Locale.ROOT);
|
|
String value = param.substring(colon + 1);
|
|
if ("border-left".equals(key) || "border-right".equals(key)) {
|
|
Float border = getFontSize(value.trim().split("\\s+")[0], 1.0f);
|
|
if (border != null && border > 0)
|
|
return true;
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
static boolean isStyled(Document d) {
|
|
ObjectHolder<Boolean> result = new ObjectHolder<>(false);
|
|
|
|
d.body().filter(new NodeFilter() {
|
|
private final List<String> STRUCTURE = Collections.unmodifiableList(Arrays.asList(
|
|
"body", "div", "p", "span", "br",
|
|
"strong", "b", "em", "i", "blockquote", "hr"
|
|
));
|
|
|
|
@Override
|
|
public FilterResult head(Node node, int depth) {
|
|
if (node instanceof Element) {
|
|
Element e = (Element) node;
|
|
|
|
String style = e.attr("style");
|
|
if (!TextUtils.isEmpty(style)) {
|
|
String[] params = style.split(";");
|
|
for (String param : params) {
|
|
int colon = param.indexOf(':');
|
|
if (colon <= 0)
|
|
continue;
|
|
String key = param.substring(0, colon).trim();
|
|
if ("color".equalsIgnoreCase(key) ||
|
|
"background-color".equalsIgnoreCase(key) ||
|
|
"font-family".equalsIgnoreCase(key) ||
|
|
"font-size".equalsIgnoreCase(key) ||
|
|
"text-align".equalsIgnoreCase(key) ||
|
|
"text-decoration".equalsIgnoreCase(key) /* line-through */) {
|
|
Log.i("Style element=" + node + " style=" + style);
|
|
result.value = true;
|
|
return FilterResult.STOP;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (STRUCTURE.contains(e.tagName()))
|
|
return FilterResult.CONTINUE;
|
|
|
|
if (!TextUtils.isEmpty(e.attr("fairemail")))
|
|
return FilterResult.CONTINUE;
|
|
|
|
//Element p = e.parent();
|
|
//if ("blockquote".equals(e.tagName()) &&
|
|
// p != null &&
|
|
// !TextUtils.isEmpty(p.attr("fairemail")))
|
|
// return FilterResult.CONTINUE;
|
|
|
|
Log.i("Style element=" + node);
|
|
result.value = true;
|
|
return FilterResult.STOP;
|
|
|
|
} else
|
|
return FilterResult.CONTINUE;
|
|
}
|
|
|
|
@Override
|
|
public FilterResult tail(Node node, int depth) {
|
|
return FilterResult.CONTINUE;
|
|
}
|
|
});
|
|
|
|
return result.value;
|
|
}
|
|
|
|
static void collapseQuotes(Document document) {
|
|
document.body().filter(new NodeFilter() {
|
|
private int level = 0;
|
|
|
|
@Override
|
|
public FilterResult head(Node node, int depth) {
|
|
if (level > 0)
|
|
return FilterResult.REMOVE;
|
|
|
|
if (node instanceof Element) {
|
|
Element element = (Element) node;
|
|
if ("blockquote".equals(element.tagName()) && hasBorder(element)) {
|
|
Element prev = element.previousElementSibling();
|
|
if (prev != null &&
|
|
"blockquote".equals(prev.tagName()) && hasBorder(prev))
|
|
return FilterResult.REMOVE;
|
|
else {
|
|
level++;
|
|
element.html("…");
|
|
}
|
|
}
|
|
}
|
|
|
|
return FilterResult.CONTINUE;
|
|
}
|
|
|
|
@Override
|
|
public FilterResult tail(Node node, int depth) {
|
|
if ("blockquote".equals(node.nodeName()))
|
|
level--;
|
|
|
|
return FilterResult.CONTINUE;
|
|
}
|
|
});
|
|
}
|
|
|
|
static void removeSignatures(Document d) {
|
|
d.body().filter(new NodeFilter() {
|
|
private boolean remove = false;
|
|
private boolean noremove = false;
|
|
|
|
@Override
|
|
public FilterResult head(Node node, int depth) {
|
|
if (node instanceof TextNode) {
|
|
TextNode tnode = (TextNode) node;
|
|
String text = tnode.getWholeText()
|
|
.replaceAll("[\r\n]+$", "")
|
|
.replaceAll("^[\r\n]+", "");
|
|
if ("-- ".equals(text)) {
|
|
if (tnode.getWholeText().endsWith("\n"))
|
|
remove = true;
|
|
else {
|
|
Node next = node.nextSibling();
|
|
if (next == null) {
|
|
Node parent = node.parent();
|
|
if (parent != null)
|
|
next = parent.nextSibling();
|
|
}
|
|
if (next != null && "br".equals(next.nodeName()))
|
|
remove = true;
|
|
}
|
|
}
|
|
} else if (node instanceof Element) {
|
|
Element element = (Element) node;
|
|
if (remove && "blockquote".equals(element.tagName()))
|
|
noremove = true;
|
|
}
|
|
|
|
return (remove && !noremove
|
|
? FilterResult.REMOVE : FilterResult.CONTINUE);
|
|
}
|
|
|
|
@Override
|
|
public FilterResult tail(Node node, int depth) {
|
|
return FilterResult.CONTINUE;
|
|
}
|
|
});
|
|
}
|
|
|
|
static String truncate(String text, int at) {
|
|
if (text.length() < at)
|
|
return text;
|
|
|
|
String preview = text.substring(0, at);
|
|
int space = preview.lastIndexOf(' ');
|
|
if (space > 0)
|
|
preview = preview.substring(0, space + 1);
|
|
return preview + "…";
|
|
}
|
|
|
|
@NonNull
|
|
static String getText(Context context, String html) {
|
|
Document d = sanitizeCompose(context, html, false);
|
|
|
|
truncate(d, getMaxFormatTextSize(context));
|
|
|
|
SpannableStringBuilder ssb = fromDocument(context, d, null, null);
|
|
|
|
for (StyleSpan span : ssb.getSpans(0, ssb.length(), StyleSpan.class)) {
|
|
int start = ssb.getSpanStart(span);
|
|
int end = ssb.getSpanEnd(span);
|
|
if (span.getStyle() == Typeface.ITALIC) {
|
|
ssb.insert(end, "/");
|
|
ssb.insert(start, "/");
|
|
} else if (span.getStyle() == Typeface.BOLD) {
|
|
ssb.insert(end, "*");
|
|
ssb.insert(start, "*");
|
|
}
|
|
}
|
|
|
|
for (UnderlineSpan span : ssb.getSpans(0, ssb.length(), UnderlineSpan.class)) {
|
|
int start = ssb.getSpanStart(span);
|
|
int end = ssb.getSpanEnd(span);
|
|
ssb.insert(end, "_");
|
|
ssb.insert(start, "_");
|
|
}
|
|
|
|
for (URLSpan span : ssb.getSpans(0, ssb.length(), URLSpan.class)) {
|
|
String url = span.getURL();
|
|
if (TextUtils.isEmpty(url))
|
|
continue;
|
|
|
|
if (url.toLowerCase(Locale.ROOT).startsWith("mailto:"))
|
|
url = url.substring("mailto:".length());
|
|
|
|
int start = ssb.getSpanStart(span);
|
|
int end = ssb.getSpanEnd(span);
|
|
String text = ssb.subSequence(start, end).toString();
|
|
if (!text.contains(url))
|
|
ssb.insert(end, "[" + url + "]");
|
|
}
|
|
|
|
for (ImageSpan span : ssb.getSpans(0, ssb.length(), ImageSpan.class)) {
|
|
String source = span.getSource();
|
|
if (TextUtils.isEmpty(source))
|
|
continue;
|
|
|
|
int start = ssb.getSpanStart(span);
|
|
int end = ssb.getSpanEnd(span);
|
|
|
|
if (!source.toLowerCase(Locale.ROOT).startsWith("data:"))
|
|
ssb.insert(end, "[" + source + "]");
|
|
|
|
for (int i = start; i < end; i++)
|
|
if (ssb.charAt(i) == '\uFFFC') {
|
|
ssb.delete(i, i + 1);
|
|
end--;
|
|
}
|
|
}
|
|
|
|
// https://tools.ietf.org/html/rfc3676#section-4.5
|
|
for (QuoteSpan span : ssb.getSpans(0, ssb.length(), QuoteSpan.class)) {
|
|
int start = ssb.getSpanStart(span);
|
|
int end = ssb.getSpanEnd(span);
|
|
|
|
for (int i = end - 2; i >= start; i--)
|
|
if (ssb.charAt(i) == '\n')
|
|
if (i + 1 < ssb.length() && ssb.charAt(i + 1) == '>')
|
|
ssb.insert(i + 1, ">");
|
|
else
|
|
ssb.insert(i + 1, "> ");
|
|
|
|
if (start < ssb.length())
|
|
ssb.insert(start, ssb.charAt(start) == '>' ? ">" : "> ");
|
|
}
|
|
|
|
for (BulletSpan span : ssb.getSpans(0, ssb.length(), BulletSpan.class)) {
|
|
int start = ssb.getSpanStart(span);
|
|
if (span instanceof NumberSpan) {
|
|
NumberSpan ns = (NumberSpan) span;
|
|
ssb.insert(start, ns.getIndex() + ". ");
|
|
int level = ns.getLevel();
|
|
for (int l = 1; l <= level; l++)
|
|
ssb.insert(start, " ");
|
|
} else {
|
|
if (span instanceof BulletSpanEx) {
|
|
BulletSpanEx bs = (BulletSpanEx) span;
|
|
|
|
if (!"none".equals(bs.getLType()))
|
|
ssb.insert(start, "* ");
|
|
|
|
int level = bs.getLevel();
|
|
for (int l = 1; l <= level; l++)
|
|
ssb.insert(start, " ");
|
|
} else
|
|
ssb.insert(start, "* ");
|
|
}
|
|
}
|
|
|
|
for (LineSpan span : ssb.getSpans(0, ssb.length(), LineSpan.class)) {
|
|
int start = ssb.getSpanStart(span);
|
|
int end = ssb.getSpanEnd(span);
|
|
ssb.replace(start, end, LINE);
|
|
}
|
|
|
|
return ssb.toString();
|
|
}
|
|
|
|
static Spanned highlightHeaders(Context context, String headers, boolean blocklist) {
|
|
SpannableStringBuilder ssb = new SpannableStringBuilderEx(headers);
|
|
int textColorLink = Helper.resolveColor(context, android.R.attr.textColorLink);
|
|
int colorVerified = Helper.resolveColor(context, R.attr.colorVerified);
|
|
int colorWarning = Helper.resolveColor(context, R.attr.colorWarning);
|
|
|
|
int index = 0;
|
|
for (String line : headers.split("\n")) {
|
|
if (line.length() > 0 && !Character.isWhitespace(line.charAt(0))) {
|
|
int colon = line.indexOf(':');
|
|
if (colon > 0)
|
|
ssb.setSpan(new ForegroundColorSpan(textColorLink), index, index + colon, 0);
|
|
}
|
|
index += line.length() + 1;
|
|
}
|
|
|
|
try {
|
|
// https://datatracker.ietf.org/doc/html/rfc2821#section-4.4
|
|
final DateFormat DTF = Helper.getDateTimeInstance(context, DateFormat.SHORT, DateFormat.MEDIUM);
|
|
|
|
MailDateFormat mdf = new MailDateFormat();
|
|
ByteArrayInputStream bis = new ByteArrayInputStream(headers.getBytes());
|
|
InternetHeaders iheaders = new InternetHeaders(bis, true);
|
|
|
|
String dh = iheaders.getHeader("Date", null);
|
|
Date tx = null;
|
|
try {
|
|
if (dh != null)
|
|
tx = mdf.parse(dh);
|
|
} catch (ParseException ex) {
|
|
Log.w(ex);
|
|
}
|
|
|
|
String[] received = iheaders.getHeader("Received");
|
|
if (received != null && received.length > 0) {
|
|
for (int i = received.length - 1; i >= 0; i--) {
|
|
ssb.append('\n');
|
|
String h = MimeUtility.unfold(received[i]);
|
|
|
|
int semi = h.lastIndexOf(';');
|
|
Date rx = null;
|
|
if (semi > 0) {
|
|
rx = mdf.parse(h, new ParsePosition(semi + 1));
|
|
h = h.substring(0, semi);
|
|
}
|
|
|
|
int s = ssb.length();
|
|
ssb.append('#').append(Integer.toString(received.length - i));
|
|
if (rx != null) {
|
|
ssb.append(' ').append(DTF.format(rx));
|
|
if (tx != null) {
|
|
long ms = rx.getTime() - tx.getTime();
|
|
ssb.append(" \u0394").append(DateUtils.formatElapsedTime(ms / 1000));
|
|
}
|
|
}
|
|
ssb.setSpan(new StyleSpan(Typeface.BOLD), s, ssb.length(), 0);
|
|
|
|
if (blocklist && i == received.length - 1) {
|
|
Drawable d = ContextCompat.getDrawable(context, R.drawable.twotone_flag_24);
|
|
|
|
int iconSize = context.getResources().getDimensionPixelSize(R.dimen.menu_item_icon_size);
|
|
d.setBounds(0, 0, iconSize, iconSize);
|
|
d.setTint(colorWarning);
|
|
|
|
ssb.append(" \uFFFC"); // Object replacement character
|
|
ssb.setSpan(new ImageSpan(d), ssb.length() - 1, ssb.length(), 0);
|
|
|
|
if (!TextUtils.isEmpty(BuildConfig.MXTOOLBOX_URI)) {
|
|
final String header = received[i];
|
|
ClickableSpan click = new ClickableSpan() {
|
|
@Override
|
|
public void onClick(@NonNull View widget) {
|
|
DnsBlockList.show(widget.getContext(), header);
|
|
}
|
|
};
|
|
ssb.setSpan(click, ssb.length() - 1, ssb.length(), 0);
|
|
}
|
|
}
|
|
|
|
ssb.append('\n');
|
|
|
|
int j = 0;
|
|
boolean p = false;
|
|
String[] w = h.split("\\s+");
|
|
while (j < w.length) {
|
|
if (w[j].startsWith("("))
|
|
p = true;
|
|
|
|
if (j > 0)
|
|
ssb.append(' ');
|
|
|
|
s = ssb.length();
|
|
ssb.append(w[j]);
|
|
if (!p && MessageHelper.RECEIVED_WORDS.contains(w[j].toLowerCase(Locale.ROOT)))
|
|
ssb.setSpan(new ForegroundColorSpan(textColorLink), s, ssb.length(), 0);
|
|
|
|
if (w[j].endsWith(")"))
|
|
p = false;
|
|
|
|
j++;
|
|
}
|
|
|
|
Boolean tls = MessageHelper.isTLS(h, i == received.length - 1);
|
|
ssb.append(" TLS=");
|
|
int t = ssb.length();
|
|
ssb.append(tls == null ? "?" : Boolean.toString(tls));
|
|
if (tls != null)
|
|
ssb.setSpan(new ForegroundColorSpan(tls ? colorVerified : colorWarning), t, ssb.length(), 0);
|
|
|
|
ssb.append("\n");
|
|
}
|
|
}
|
|
} catch (Throwable ex) {
|
|
Log.w(ex);
|
|
}
|
|
|
|
return ssb;
|
|
}
|
|
|
|
static void highlightSearched(Context context, Document document, String query) {
|
|
try {
|
|
int color = Helper.resolveColor(context, R.attr.colorHighlight);
|
|
|
|
StringBuilder sb = new StringBuilder();
|
|
for (String word : query.trim().split("\\s+")) {
|
|
if (word.startsWith("+") || word.startsWith("-"))
|
|
continue;
|
|
for (String w : Fts4DbHelper.breakText(word).split("\\s+")) {
|
|
if (sb.length() > 0)
|
|
sb.append("\\s*");
|
|
sb.append(Pattern.quote(w));
|
|
}
|
|
}
|
|
sb.insert(0, ".*?\\b(");
|
|
sb.append(")\\b.*?");
|
|
|
|
Pattern p = Pattern.compile(sb.toString(), Pattern.DOTALL);
|
|
|
|
NodeTraversor.traverse(new NodeVisitor() {
|
|
@Override
|
|
public void head(Node node, int depth) {
|
|
if (node instanceof TextNode)
|
|
try {
|
|
TextNode tnode = (TextNode) node;
|
|
String text = Fts4DbHelper.preprocessText(tnode.getWholeText());
|
|
|
|
Matcher result = p.matcher(text);
|
|
|
|
int prev = 0;
|
|
Element holder = document.createElement("span");
|
|
while (result.find()) {
|
|
int start = result.start(1);
|
|
int end = result.end(1);
|
|
|
|
holder.appendText(text.substring(prev, start));
|
|
|
|
Element span = document.createElement("span");
|
|
span.attr("style", mergeStyles(
|
|
span.attr("style"),
|
|
"font-size:larger; background-color:" + encodeWebColor(color)
|
|
));
|
|
span.text(text.substring(start, end));
|
|
holder.appendChild(span);
|
|
|
|
prev = end;
|
|
}
|
|
|
|
if (prev == 0) // No matches
|
|
return;
|
|
|
|
if (prev < text.length())
|
|
holder.appendText(text.substring(prev));
|
|
|
|
tnode.before(holder);
|
|
tnode.text("");
|
|
} catch (Throwable ex) {
|
|
Log.e(ex);
|
|
}
|
|
}
|
|
|
|
@Override
|
|
public void tail(Node node, int depth) {
|
|
}
|
|
}, document);
|
|
} catch (Throwable ex) {
|
|
Log.e(ex);
|
|
}
|
|
}
|
|
|
|
static Document markText(Document document) {
|
|
for (Element mark : document.select("mark")) {
|
|
String style = mark.attr("style");
|
|
mark.attr("style", mergeStyles(style, "font-style: italic;"));
|
|
}
|
|
|
|
return document;
|
|
}
|
|
|
|
static void cleanup(Document d) {
|
|
// https://www.chromestatus.com/feature/5756335865987072
|
|
// Some messages contain 100 thousands of Apple spaces
|
|
for (Element aspace : d.select(".Apple-converted-space")) {
|
|
Node next = aspace.nextSibling();
|
|
if (next instanceof TextNode) {
|
|
TextNode tnode = (TextNode) next;
|
|
tnode.text(" " + tnode.text());
|
|
aspace.remove();
|
|
} else
|
|
aspace.replaceWith(new TextNode(" "));
|
|
}
|
|
}
|
|
|
|
static void quoteLimit(Document d, int maxLevel) {
|
|
for (Element bq : d.select("blockquote")) {
|
|
int level = 1;
|
|
Element parent = bq.parent();
|
|
while (parent != null) {
|
|
if ("blockquote".equals(parent.tagName())) // TODO: indentation
|
|
level++;
|
|
parent = parent.parent();
|
|
}
|
|
if (level >= maxLevel)
|
|
bq.html("…");
|
|
}
|
|
}
|
|
|
|
static boolean truncate(Document d, int max) {
|
|
final int[] length = new int[1];
|
|
|
|
NodeTraversor.filter(new NodeFilter() {
|
|
@Override
|
|
public FilterResult head(Node node, int depth) {
|
|
if (length[0] >= max)
|
|
return FilterResult.REMOVE;
|
|
else if (node instanceof TextNode) {
|
|
TextNode tnode = ((TextNode) node);
|
|
String text = tnode.getWholeText();
|
|
if (length[0] + text.length() >= max) {
|
|
text = text.substring(0, max - length[0]) + " ...";
|
|
tnode.text(text);
|
|
length[0] += text.length();
|
|
return FilterResult.SKIP_ENTIRELY;
|
|
} else
|
|
length[0] += text.length();
|
|
}
|
|
return FilterResult.CONTINUE;
|
|
}
|
|
|
|
@Override
|
|
public FilterResult tail(Node node, int depth) {
|
|
return FilterResult.CONTINUE;
|
|
}
|
|
}, d.body());
|
|
|
|
Log.i("Message size=" + length[0]);
|
|
return (length[0] > max);
|
|
}
|
|
|
|
static boolean contains(Document d, String[] texts) {
|
|
Map<String, Boolean> condition = new HashMap<>();
|
|
for (String t : texts)
|
|
condition.put(t, false);
|
|
|
|
for (Element elm : d.body().select("*"))
|
|
for (Node child : elm.childNodes()) {
|
|
if (child instanceof TextNode) {
|
|
TextNode tnode = ((TextNode) child);
|
|
String text = tnode.getWholeText();
|
|
for (String t : texts)
|
|
if (!condition.get(t) && text.contains(t)) {
|
|
condition.put(t, true);
|
|
|
|
boolean found = true;
|
|
for (String c : texts)
|
|
if (!condition.get(c)) {
|
|
found = false;
|
|
break;
|
|
}
|
|
|
|
if (found)
|
|
return true;
|
|
}
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
static SpannableStringBuilder fromDocument(
|
|
Context context, @NonNull Document document,
|
|
@Nullable ImageGetterEx imageGetter, @Nullable Html.TagHandler tagHandler) {
|
|
SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
|
|
boolean debug = prefs.getBoolean("debug", false);
|
|
boolean monospaced_pre = prefs.getBoolean("monospaced_pre", false);
|
|
|
|
final int colorPrimary = Helper.resolveColor(context, R.attr.colorPrimary);
|
|
final int colorAccent = Helper.resolveColor(context, R.attr.colorAccent);
|
|
final int colorBlockquote = Helper.resolveColor(context, R.attr.colorBlockquote, colorPrimary);
|
|
final int colorSeparator = Helper.resolveColor(context, R.attr.colorSeparator);
|
|
int bulletGap = context.getResources().getDimensionPixelSize(R.dimen.bullet_gap_size);
|
|
int bulletRadius = context.getResources().getDimensionPixelSize(R.dimen.bullet_radius_size);
|
|
int bulletIndent = context.getResources().getDimensionPixelSize(R.dimen.bullet_indent_size);
|
|
int intentSize = context.getResources().getDimensionPixelSize(R.dimen.indent_size);
|
|
int quoteGap = context.getResources().getDimensionPixelSize(R.dimen.quote_gap_size);
|
|
int quoteStripe = context.getResources().getDimensionPixelSize(R.dimen.quote_stripe_width);
|
|
int line_dash_length = context.getResources().getDimensionPixelSize(R.dimen.line_dash_length);
|
|
|
|
int message_zoom = prefs.getInt("message_zoom", 100);
|
|
float textSize = Helper.getTextSize(context, 0) * message_zoom / 100f;
|
|
|
|
// https://developer.mozilla.org/en-US/docs/Web/HTML/Block-level_elements
|
|
NodeTraversor.traverse(new NodeVisitor() {
|
|
private Element element;
|
|
private int plain = 0;
|
|
private List<TextNode> block = new ArrayList<>();
|
|
|
|
private final Pattern FOLD_WHITESPACE = Pattern.compile("[ \t\f\r\n]+");
|
|
|
|
// https://developer.mozilla.org/en-US/docs/Web/HTML/Block-level_elements
|
|
|
|
@Override
|
|
public void head(Node node, int depth) {
|
|
if (node instanceof TextNode) {
|
|
if (plain == 0)
|
|
block.add((TextNode) node);
|
|
} else if (node instanceof Element) {
|
|
element = (Element) node;
|
|
if ("true".equals(element.attr("x-plain")))
|
|
plain++;
|
|
if (element.isBlock() /* x-block is never false */ ||
|
|
"true".equals(element.attr("x-block"))) {
|
|
normalizeText(block);
|
|
block.clear();
|
|
}
|
|
}
|
|
}
|
|
|
|
@Override
|
|
public void tail(Node node, int depth) {
|
|
if (node instanceof Element) {
|
|
element = (Element) node;
|
|
if ("true".equals(element.attr("x-plain")))
|
|
plain--;
|
|
if (element.isBlock() /* x-block is never false */ ||
|
|
"true".equals(element.attr("x-block")) ||
|
|
"br".equals(element.tagName())) {
|
|
normalizeText(block);
|
|
block.clear();
|
|
}
|
|
}
|
|
}
|
|
|
|
private void normalizeText(List<TextNode> block) {
|
|
// https://developer.mozilla.org/en-US/docs/Web/API/Document_Object_Model/Whitespace
|
|
TextNode tnode;
|
|
String text;
|
|
for (int i = 0; i < block.size(); ) {
|
|
tnode = block.get(i);
|
|
text = tnode.getWholeText();
|
|
|
|
if ("-- ".equals(text)) {
|
|
tnode.text(text);
|
|
i++;
|
|
continue;
|
|
}
|
|
|
|
// Fold white space
|
|
text = FOLD_WHITESPACE.matcher(text).replaceAll(" ");
|
|
|
|
// Conditionally remove leading whitespace
|
|
if (isSpace(text, 0) &&
|
|
(i == 0 || endsWithSpace(block.get(i - 1).text())))
|
|
text = text.substring(1);
|
|
|
|
// Soft hyphen
|
|
if (text.trim().equals("\u00ad"))
|
|
text = "";
|
|
|
|
tnode.text(text);
|
|
|
|
if (TextUtils.isEmpty(text))
|
|
block.remove(i);
|
|
else
|
|
i++;
|
|
}
|
|
|
|
// Remove trailing whitespace
|
|
while (block.size() > 0) {
|
|
tnode = block.get(block.size() - 1);
|
|
text = tnode.getWholeText();
|
|
if (endsWithSpace(text) && !"-- ".equals(text)) {
|
|
text = text.substring(0, text.length() - 1);
|
|
tnode.text(text);
|
|
}
|
|
if (TextUtils.isEmpty(text))
|
|
block.remove(block.size() - 1);
|
|
else
|
|
break;
|
|
}
|
|
|
|
// Remove all blank blocks
|
|
boolean blank = true;
|
|
for (int i = 0; i < block.size(); i++) {
|
|
text = block.get(i).getWholeText();
|
|
for (int j = 0; j < text.length(); j++) {
|
|
char kar = text.charAt(j);
|
|
if (kar != ' ') {
|
|
blank = false;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
if (blank)
|
|
for (int i = 0; i < block.size(); i++)
|
|
block.get(i).text("");
|
|
|
|
if (debug) {
|
|
if (block.size() > 0) {
|
|
TextNode first = block.get(0);
|
|
TextNode last = block.get(block.size() - 1);
|
|
first.text("(" + first.getWholeText());
|
|
last.text(last.getWholeText() + ")");
|
|
}
|
|
}
|
|
}
|
|
|
|
boolean isSpace(String text, int index) {
|
|
if (index < 0 || index >= text.length())
|
|
return false;
|
|
return (text.charAt(index) == ' ');
|
|
}
|
|
|
|
boolean endsWithSpace(String text) {
|
|
return isSpace(text, text.length() - 1);
|
|
}
|
|
}, document.body());
|
|
|
|
// https://developer.android.com/guide/topics/text/spans
|
|
SpannableStringBuilder ssb = new SpannableStringBuilderEx();
|
|
|
|
NodeTraversor.traverse(new NodeVisitor() {
|
|
private Element element;
|
|
private TextNode tnode;
|
|
private Typeface wingdings = null;
|
|
|
|
@Override
|
|
public void head(Node node, int depth) {
|
|
if (node instanceof Element) {
|
|
element = (Element) node;
|
|
Element prev = element.previousElementSibling();
|
|
|
|
if ("true".equals(element.attr("x-block")))
|
|
if (ssb.length() > 0 && ssb.charAt(ssb.length() - 1) != '\n')
|
|
ssb.append('\n');
|
|
|
|
if ("true".equals(element.attr("x-paragraph")) &&
|
|
!"false".equals(element.attr("x-line-before")))
|
|
if (ssb.length() > 1 &&
|
|
(ssb.charAt(ssb.length() - 2) != '\n' ||
|
|
ssb.charAt(ssb.length() - 1) != '\n'))
|
|
ssb.append('\n');
|
|
|
|
if ("true".equals(element.attr("x-line-before")) &&
|
|
(prev == null || !"true".equals(prev.attr("x-line-after"))) &&
|
|
ssb.length() > 0 && ssb.charAt(ssb.length() - 1) == '\n')
|
|
ssb.append('\n');
|
|
|
|
element.attr("start-index", Integer.toString(ssb.length()));
|
|
|
|
if (debug)
|
|
ssb.append("[" + element.tagName() + "/" + element.className() +
|
|
":" + "bl=" + element.attr("x-block") +
|
|
":" + "pa=" + element.attr("x-paragraph") +
|
|
":" + "fo=" + element.attr("x-line-before") +
|
|
":" + "af=" + element.attr("x-line-after") +
|
|
":" + element.attr("style") + "]");
|
|
} else if (node instanceof TextNode) {
|
|
tnode = (TextNode) node;
|
|
String text = tnode.getWholeText();
|
|
ssb.append(text);
|
|
}
|
|
}
|
|
|
|
@Override
|
|
public void tail(Node node, int depth) {
|
|
if (node instanceof Element) {
|
|
element = (Element) node;
|
|
int start = Integer.parseInt(element.attr("start-index"));
|
|
|
|
// Apply style
|
|
String style = element.attr("style");
|
|
if (!TextUtils.isEmpty(style)) {
|
|
String[] params = style.split(";");
|
|
for (String param : params) {
|
|
int semi = param.indexOf(":");
|
|
if (semi < 0)
|
|
continue;
|
|
String key = param.substring(0, semi);
|
|
String value = param.substring(semi + 1);
|
|
switch (key) {
|
|
case "color":
|
|
case "background":
|
|
case "background-color":
|
|
if (!TextUtils.isEmpty(value))
|
|
try {
|
|
int color = parseWebColor(value);
|
|
CharacterStyle span;
|
|
if ("color".equals(key))
|
|
span = new ForegroundColorSpan(color);
|
|
else
|
|
span = new BackgroundColorSpan(color);
|
|
setSpan(ssb, span, start, ssb.length());
|
|
} catch (Throwable ex) {
|
|
Log.i(ex);
|
|
}
|
|
break;
|
|
case "font-family":
|
|
if ("wingdings".equalsIgnoreCase(value)) {
|
|
if (wingdings == null)
|
|
wingdings = ResourcesCompat.getFont(context.getApplicationContext(), R.font.wingdings);
|
|
|
|
int from = start;
|
|
for (int i = start; i < ssb.length(); i++) {
|
|
int kar = ssb.charAt(i);
|
|
if (MAP_WINGDINGS.containsKey(kar)) {
|
|
if (from < i) {
|
|
TypefaceSpan span = new CustomTypefaceSpan("wingdings", wingdings);
|
|
setSpan(ssb, span, from, i);
|
|
}
|
|
int codepoint = MAP_WINGDINGS.get(kar);
|
|
String replacement = new String(Character.toChars(codepoint));
|
|
ssb.replace(i, i + 1, replacement);
|
|
i += replacement.length() - 1;
|
|
from = i + 1;
|
|
}
|
|
}
|
|
|
|
if (from < ssb.length()) {
|
|
TypefaceSpan span = new CustomTypefaceSpan("wingdings", wingdings);
|
|
setSpan(ssb, span, from, ssb.length());
|
|
}
|
|
} else
|
|
setSpan(ssb, StyleHelper.getTypefaceSpan(value, context), start, ssb.length());
|
|
break;
|
|
case "font-style":
|
|
if ("italic".equals(value))
|
|
setSpan(ssb, new StyleSpan(Typeface.ITALIC), start, ssb.length());
|
|
break;
|
|
case "text-decoration":
|
|
if ("line-through".equals(value))
|
|
setSpan(ssb, new StrikethroughSpan(), start, ssb.length());
|
|
else if ("underline".equals(value))
|
|
setSpan(ssb, new UnderlineSpan(), start, ssb.length());
|
|
break;
|
|
case "text-align":
|
|
// https://developer.mozilla.org/en-US/docs/Web/CSS/text-align
|
|
Layout.Alignment alignment = null;
|
|
boolean rtl;
|
|
try {
|
|
rtl = TextDirectionHeuristics.FIRSTSTRONG_LTR.isRtl(ssb, start, ssb.length() - start);
|
|
} catch (Throwable ex) {
|
|
// IllegalArgumentException
|
|
Log.e(ex);
|
|
rtl = false;
|
|
}
|
|
switch (value) {
|
|
case "left":
|
|
case "start":
|
|
alignment = (rtl ? Layout.Alignment.ALIGN_OPPOSITE : Layout.Alignment.ALIGN_NORMAL);
|
|
break;
|
|
case "center":
|
|
alignment = Layout.Alignment.ALIGN_CENTER;
|
|
break;
|
|
case "right":
|
|
case "end":
|
|
alignment = (rtl ? Layout.Alignment.ALIGN_NORMAL : Layout.Alignment.ALIGN_OPPOSITE);
|
|
break;
|
|
case "justify":
|
|
// Not supported by Android
|
|
break;
|
|
}
|
|
if (alignment != null)
|
|
setSpan(ssb, new AlignmentSpan.Standard(alignment), start, ssb.length());
|
|
break;
|
|
case "visibility":
|
|
if ("hidden".equals(value)) {
|
|
for (ForegroundColorSpan span : ssb.getSpans(start, ssb.length(), ForegroundColorSpan.class))
|
|
ssb.removeSpan(span);
|
|
for (BackgroundColorSpan span : ssb.getSpans(start, ssb.length(), BackgroundColorSpan.class))
|
|
ssb.removeSpan(span);
|
|
setSpan(ssb, new ForegroundColorSpan(Color.TRANSPARENT), start, ssb.length());
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Apply calculated font size
|
|
String xFontSizeAbs = element.attr("x-font-size-abs");
|
|
if (TextUtils.isEmpty(xFontSizeAbs)) {
|
|
String xFontSizeRel = element.attr("x-font-size-rel");
|
|
if (!TextUtils.isEmpty(xFontSizeRel)) {
|
|
float fsize = Float.parseFloat(xFontSizeRel);
|
|
if (fsize != 1.0f)
|
|
setSpan(ssb, new RelativeSizeSpan(fsize), start, ssb.length());
|
|
}
|
|
} else {
|
|
int px = Integer.parseInt(xFontSizeAbs);
|
|
setSpan(ssb, new AbsoluteSizeSpan(px), start, ssb.length());
|
|
}
|
|
|
|
// Apply element
|
|
try {
|
|
String tag = element.tagName();
|
|
int semi = tag.indexOf(':');
|
|
if (semi >= 0)
|
|
tag = tag.substring(semi + 1);
|
|
|
|
switch (tag) {
|
|
case "a":
|
|
String href = element.attr("href");
|
|
if (!TextUtils.isEmpty(href)) {
|
|
if (false && BuildConfig.DEBUG) {
|
|
Uri uri = UriHelper.guessScheme(Uri.parse(href));
|
|
if (UriHelper.isHyperLink(uri))
|
|
ssb.append("\uD83D\uDD17"); // 🔗
|
|
// Unicode 6.0, supported since Android 4.1
|
|
// https://developer.android.com/guide/topics/resources/internationalization
|
|
}
|
|
setSpan(ssb, new URLSpan(href), start, ssb.length());
|
|
}
|
|
break;
|
|
case "big":
|
|
setSpan(ssb, new RelativeSizeSpan(FONT_LARGE), start, ssb.length());
|
|
break;
|
|
case "blockquote":
|
|
if (start == 0 || ssb.charAt(start - 1) != '\n')
|
|
ssb.insert(start++, "\n");
|
|
if (start == ssb.length())
|
|
ssb.append(' ');
|
|
if (ssb.length() == 0 || ssb.charAt(ssb.length() - 1) != '\n')
|
|
ssb.append("\n");
|
|
|
|
if (hasBorder(element)) {
|
|
if (Build.VERSION.SDK_INT < Build.VERSION_CODES.P)
|
|
setSpan(ssb, new QuoteSpan(colorBlockquote), start, ssb.length(), Spanned.SPAN_INCLUSIVE_EXCLUSIVE);
|
|
else
|
|
setSpan(ssb, new QuoteSpan(colorBlockquote, quoteStripe, quoteGap), start, ssb.length(), Spanned.SPAN_INCLUSIVE_EXCLUSIVE);
|
|
} else
|
|
setSpan(ssb, new IndentSpan(intentSize), start, ssb.length(), Spanned.SPAN_INCLUSIVE_EXCLUSIVE);
|
|
break;
|
|
case "br":
|
|
ssb.append('\n');
|
|
|
|
int l = ssb.length() - 1;
|
|
List<Object> spans = new ArrayList<>();
|
|
spans.addAll(Arrays.asList(ssb.getSpans(l, l, AbsoluteSizeSpan.class)));
|
|
spans.addAll(Arrays.asList(ssb.getSpans(l, l, RelativeSizeSpan.class)));
|
|
for (Object span : spans) {
|
|
int s = ssb.getSpanStart(span);
|
|
int e = ssb.getSpanEnd(span);
|
|
int f = ssb.getSpanFlags(span);
|
|
if (e == l) {
|
|
ssb.removeSpan(span);
|
|
if (span instanceof AbsoluteSizeSpan) {
|
|
int size = ((AbsoluteSizeSpan) span).getSize();
|
|
setSpan(ssb, new AbsoluteSizeSpan(size), s, e + 1, f);
|
|
} else if (span instanceof RelativeSizeSpan) {
|
|
float size = ((RelativeSizeSpan) span).getSizeChange();
|
|
setSpan(ssb, new RelativeSizeSpan(size), s, e + 1, f);
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
case "body":
|
|
// Do nothing
|
|
break;
|
|
case "div": // signature
|
|
// Do nothing
|
|
break;
|
|
case "i":
|
|
case "em":
|
|
setSpan(ssb, new StyleSpan(Typeface.ITALIC), start, ssb.length());
|
|
break;
|
|
case "font":
|
|
String face = element.attr("face");
|
|
if (!TextUtils.isEmpty(face))
|
|
setSpan(ssb, StyleHelper.getTypefaceSpan(face, context), start, ssb.length());
|
|
break;
|
|
case "h1":
|
|
case "h2":
|
|
case "h3":
|
|
case "h4":
|
|
case "h5":
|
|
case "h6":
|
|
// Font size is already set
|
|
setSpan(ssb, new StyleSpan(Typeface.BOLD), start, ssb.length());
|
|
break;
|
|
case "hr":
|
|
// Suppress successive lines
|
|
if (!"true".equals(element.attr("x-keep-line"))) {
|
|
LineSpan[] lines = ssb.getSpans(0, ssb.length(), LineSpan.class);
|
|
int last = -1;
|
|
if (lines != null)
|
|
for (LineSpan line : lines) {
|
|
int e = ssb.getSpanEnd(line);
|
|
if (e > last)
|
|
last = e;
|
|
}
|
|
if (last >= 0) {
|
|
boolean blank = true;
|
|
for (int i = last; i < ssb.length(); i++) {
|
|
char kar = ssb.charAt(i);
|
|
if (kar != ' ' && kar != '\n' && kar != '\u00a0') {
|
|
blank = false;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (blank)
|
|
break;
|
|
}
|
|
}
|
|
|
|
boolean dashed = "true".equals(element.attr("x-dashed"));
|
|
float stroke = context.getResources().getDisplayMetrics().density;
|
|
float dash = (dashed ? line_dash_length : 0f);
|
|
ssb.append("\uFFFC"); // Object replacement character
|
|
setSpan(ssb, new LineSpan(colorSeparator, stroke, dash), start, ssb.length());
|
|
break;
|
|
case "img":
|
|
String src = element.attr("src");
|
|
if (!TextUtils.isEmpty(src)) {
|
|
Drawable d = (imageGetter == null
|
|
? ContextCompat.getDrawable(context, R.drawable.twotone_broken_image_24)
|
|
: imageGetter.getDrawable(element));
|
|
ssb.insert(start, "\uFFFC"); // Object replacement character
|
|
setSpan(ssb, new ImageSpanEx(d, element), start, start + 1);
|
|
}
|
|
break;
|
|
case "li":
|
|
if (start == 0 || ssb.charAt(start - 1) != '\n')
|
|
ssb.insert(start++, "\n");
|
|
if (ssb.length() == 0 || ssb.charAt(ssb.length() - 1) != '\n')
|
|
ssb.append("\n");
|
|
|
|
int level = 0;
|
|
Element list = null;
|
|
String ltype = element.attr("type");
|
|
if (TextUtils.isEmpty(ltype))
|
|
ltype = element.attr("x-list-style");
|
|
Element parent = element.parent();
|
|
while (parent != null) {
|
|
if ("ol".equals(parent.tagName()) || "ul".equals(parent.tagName())) {
|
|
if (!"false".equals(parent.attr("x-list-level")))
|
|
level++;
|
|
if (list == null)
|
|
list = parent;
|
|
if (TextUtils.isEmpty(ltype))
|
|
ltype = parent.attr("type");
|
|
if (TextUtils.isEmpty(ltype))
|
|
ltype = parent.attr("x-list-style");
|
|
}
|
|
parent = parent.parent();
|
|
}
|
|
if (level > 0)
|
|
level--;
|
|
|
|
if (list == null ||
|
|
("ul".equals(list.tagName()) &&
|
|
!NumberSpan.isSupportedType(ltype))) {
|
|
// https://developer.mozilla.org/en-US/docs/Web/HTML/Element/ul
|
|
Object ul;
|
|
if (Build.VERSION.SDK_INT < Build.VERSION_CODES.P)
|
|
ul = new BulletSpanEx(bulletIndent, bulletGap, colorAccent, level, ltype);
|
|
else
|
|
ul = new BulletSpanEx(bulletIndent, bulletGap, colorAccent, bulletRadius, level, ltype);
|
|
setSpan(ssb, ul, start, ssb.length());
|
|
} else {
|
|
// https://developer.mozilla.org/en-US/docs/Web/HTML/Element/ol
|
|
int index = 0;
|
|
String s = list.attr("start");
|
|
if (!TextUtils.isEmpty(s) && TextUtils.isDigitsOnly(s))
|
|
index = Integer.parseInt(s) - 1;
|
|
for (Node child : list.childNodes()) {
|
|
if (child instanceof Element &&
|
|
child.nodeName().equals(element.tagName())) {
|
|
index++;
|
|
if (child == element)
|
|
break;
|
|
}
|
|
}
|
|
|
|
setSpan(ssb, new NumberSpan(bulletIndent, bulletGap, colorAccent, textSize, level, index, ltype), start, ssb.length());
|
|
}
|
|
|
|
break;
|
|
case "mark":
|
|
setSpan(ssb, new StyleHelper.MarkSpan(), start, ssb.length());
|
|
break;
|
|
case "pre":
|
|
case "tt":
|
|
// Signature
|
|
setSpan(ssb, StyleHelper.getTypefaceSpan("Cousine", context), start, ssb.length());
|
|
break;
|
|
case "style":
|
|
// signatures
|
|
break;
|
|
case "ol":
|
|
case "ul":
|
|
break;
|
|
case "meta":
|
|
// Signature
|
|
break;
|
|
case "p":
|
|
// Signature
|
|
break;
|
|
case "small":
|
|
setSpan(ssb, new RelativeSizeSpan(FONT_SMALL), start, ssb.length());
|
|
break;
|
|
case "span":
|
|
// Do nothing
|
|
break;
|
|
case "sub":
|
|
setSpan(ssb, new SubscriptSpanEx(), start, ssb.length());
|
|
break;
|
|
case "sup":
|
|
setSpan(ssb, new SuperscriptSpanEx(), start, ssb.length());
|
|
break;
|
|
case "table":
|
|
case "thead":
|
|
case "tbody":
|
|
case "tfoot":
|
|
case "tr":
|
|
case "th":
|
|
case "td":
|
|
// Signature
|
|
break;
|
|
case "b":
|
|
case "code": // Signature
|
|
case "strong":
|
|
setSpan(ssb, new StyleSpan(Typeface.BOLD), start, ssb.length());
|
|
break;
|
|
case "s":
|
|
case "del":
|
|
case "strike":
|
|
setSpan(ssb, new StrikethroughSpan(), start, ssb.length());
|
|
break;
|
|
case "title":
|
|
// Signature, etc
|
|
break;
|
|
case "u":
|
|
setSpan(ssb, new UnderlineSpan(), start, ssb.length());
|
|
break;
|
|
default:
|
|
Log.w("Unknown tag=" + element.tagName());
|
|
}
|
|
|
|
if (monospaced_pre &&
|
|
"true".equals(element.attr("x-plain")))
|
|
setSpan(ssb, StyleHelper.getTypefaceSpan("Cousine", context), start, ssb.length());
|
|
} catch (Throwable ex) {
|
|
Log.e(ex);
|
|
if (BuildConfig.DEBUG || debug) {
|
|
int s = ssb.length();
|
|
ssb.append(ex.toString()).append('\n')
|
|
.append(android.util.Log.getStackTraceString(ex)).append('\n');
|
|
setSpan(ssb, StyleHelper.getTypefaceSpan("Cousine", context), s, ssb.length());
|
|
setSpan(ssb, new RelativeSizeSpan(HtmlHelper.FONT_SMALL), s, ssb.length());
|
|
int colorWarning = Helper.resolveColor(context, R.attr.colorWarning);
|
|
setSpan(ssb, new ForegroundColorSpan(colorWarning), s, ssb.length());
|
|
}
|
|
}
|
|
|
|
if ("true".equals(element.attr("x-block")))
|
|
if (ssb.length() > 0 && ssb.charAt(ssb.length() - 1) != '\n')
|
|
ssb.append('\n');
|
|
|
|
if ("true".equals(element.attr("x-paragraph")) &&
|
|
!"false".equals(element.attr("x-line-after")))
|
|
if (ssb.length() > 1 &&
|
|
(ssb.charAt(ssb.length() - 2) != '\n' ||
|
|
ssb.charAt(ssb.length() - 1) != '\n'))
|
|
ssb.append('\n');
|
|
|
|
if ("true".equals(element.attr("x-line-after")) &&
|
|
ssb.length() > 0 && ssb.charAt(ssb.length() - 1) == '\n')
|
|
ssb.append('\n');
|
|
|
|
if ("true".equals(element.attr("x-column")) &&
|
|
ssb.length() > 1 &&
|
|
ssb.charAt(ssb.length() - 1) != '\n' &&
|
|
ssb.charAt(ssb.length() - 1) != '\u00a0' &&
|
|
ssb.charAt(ssb.length() - 1) != '\u2002')
|
|
ssb.append('\u2002'); // ensp
|
|
|
|
if (debug)
|
|
ssb.append("[/" + element.tagName() + "]");
|
|
}
|
|
}
|
|
|
|
private void setSpan(SpannableStringBuilder ssb, Object span, int start, int end) {
|
|
setSpan(ssb, span, start, end, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
|
|
}
|
|
|
|
private void setSpan(SpannableStringBuilder ssb, Object span, int start, int end, int flags) {
|
|
if (start == end)
|
|
return;
|
|
int len = ssb.length();
|
|
if (start >= 0 && start < len && end <= len)
|
|
ssb.setSpan(span, start, end, flags);
|
|
else
|
|
Log.e("Invalid span " + start + "..." + end + " len=" + len + " type=" + span.getClass().getName());
|
|
}
|
|
}, document.body());
|
|
|
|
for (LineSpan line : ssb.getSpans(0, ssb.length(), LineSpan.class)) {
|
|
int end = ssb.getSpanEnd(line);
|
|
if (end < ssb.length() && ssb.charAt(end) != '\n')
|
|
ssb.insert(end, "\n");
|
|
}
|
|
|
|
if (debug)
|
|
for (int i = ssb.length() - 1; i >= 0; i--) {
|
|
char kar = ssb.charAt(i);
|
|
if (kar == '\n')
|
|
ssb.insert(i, "|");
|
|
else if (kar == ' ')
|
|
ssb.replace(i, i + 1, "_");
|
|
else if (kar == '\u00A0')
|
|
ssb.replace(i, i + 1, "•");
|
|
else if (!Helper.isPrintableChar(kar))
|
|
ssb.replace(i, i + 1, "{" + Integer.toHexString(kar) + "}");
|
|
}
|
|
|
|
Object[] spans = ssb.getSpans(0, ssb.length(), Object.class);
|
|
Map<Object, Integer> start = new HashMap<>();
|
|
Map<Object, Integer> end = new HashMap<>();
|
|
Map<Object, Integer> flags = new HashMap<>();
|
|
for (Object span : spans) {
|
|
start.put(span, ssb.getSpanStart(span));
|
|
end.put(span, ssb.getSpanEnd(span));
|
|
flags.put(span, ssb.getSpanFlags(span));
|
|
ssb.removeSpan(span);
|
|
}
|
|
for (int i = spans.length - 1; i >= 0; i--) {
|
|
int s = start.get(spans[i]);
|
|
int e = end.get(spans[i]);
|
|
int f = flags.get(spans[i]);
|
|
if (spans[i] instanceof AlignmentSpan ||
|
|
spans[i] instanceof BulletSpan ||
|
|
spans[i] instanceof NumberSpan) {
|
|
if (spans[i] instanceof AlignmentSpan &&
|
|
!(e > 0 && ssb.charAt(e - 1) == '\n') &&
|
|
e < ssb.length() && ssb.charAt(e) == '\n')
|
|
e++;
|
|
if (s > 0 && ssb.charAt(s - 1) == '\n' &&
|
|
e > 0 && ssb.charAt(e - 1) == '\n')
|
|
f |= Spanned.SPAN_PARAGRAPH;
|
|
}
|
|
ssb.setSpan(spans[i], s, e, f);
|
|
}
|
|
|
|
return ssb;
|
|
}
|
|
|
|
static void clearAnnotations(Document d) {
|
|
d.select("*")
|
|
.removeAttr("x-background")
|
|
.removeAttr("x-color")
|
|
.removeAttr("x-block")
|
|
.removeAttr("x-inline")
|
|
.removeAttr("x-paragraph")
|
|
.removeAttr("x-font-size")
|
|
.removeAttr("x-font-size-rel")
|
|
.removeAttr("x-font-size-abs")
|
|
.removeAttr("x-line-before")
|
|
.removeAttr("x-line-after")
|
|
.removeAttr("x-align")
|
|
.removeAttr("x-column")
|
|
.removeAttr("x-dashed")
|
|
.removeAttr("x-tracking")
|
|
.removeAttr("x-border")
|
|
.removeAttr("x-list-style")
|
|
.removeAttr("x-list-level")
|
|
.removeAttr("x-plain")
|
|
.remove("x-keep-line");
|
|
}
|
|
|
|
static Spanned fromHtml(@NonNull String html, Context context) {
|
|
Document document = JsoupEx.parse(html);
|
|
return fromDocument(context, document, null, null);
|
|
}
|
|
|
|
static String toHtml(Spanned spanned, Context context) {
|
|
HtmlEx converter = new HtmlEx(context);
|
|
String html = converter.toHtml(spanned, TO_HTML_PARAGRAPH_LINES_INDIVIDUAL);
|
|
|
|
Document doc = JsoupEx.parse(html);
|
|
|
|
if (doc.head().select("meta[name=viewport]").first() == null)
|
|
doc.head().prependElement("meta")
|
|
.attr("name", "viewport")
|
|
.attr("content", "width=device-width, initial-scale=1.0");
|
|
|
|
for (Element span : doc.select("span")) {
|
|
if (span.attr("dir").equals("rtl")) {
|
|
Element next = span.nextElementSibling();
|
|
if (next != null && next.tagName().equals("br")) {
|
|
span.tagName("div");
|
|
span.appendElement("br");
|
|
next.remove();
|
|
}
|
|
}
|
|
|
|
String style = span.attr("style");
|
|
if (TextUtils.isEmpty(style))
|
|
continue;
|
|
|
|
StringBuilder sb = new StringBuilder();
|
|
|
|
String[] params = style.split(";");
|
|
for (String param : params) {
|
|
int semi = param.indexOf(":");
|
|
if (semi < 0) {
|
|
sb.append(param).append(';');
|
|
continue;
|
|
}
|
|
|
|
String key = param.substring(0, semi).trim();
|
|
String value = param.substring(semi + 1).trim();
|
|
|
|
switch (key) {
|
|
case "text-align":
|
|
sb.append(" display:block;");
|
|
// fall through
|
|
default:
|
|
sb.append(param).append(';');
|
|
}
|
|
|
|
if (sb.length() == 0)
|
|
span.removeAttr("style");
|
|
else
|
|
span.attr("style", sb.toString());
|
|
}
|
|
}
|
|
|
|
for (Element e : doc.select("ol,ul")) {
|
|
int ltr = 0;
|
|
int rtl = 0;
|
|
for (Element li : e.children()) {
|
|
if ("rtl".equals(li.attr("dir")))
|
|
rtl++;
|
|
else
|
|
ltr++;
|
|
li.removeAttr("dir");
|
|
}
|
|
e.attr("dir", rtl > ltr ? "rtl" : "ltr");
|
|
|
|
Element parent = e.parent();
|
|
Element prev = e.previousElementSibling();
|
|
if (parent != null && !"li".equals(parent.tagName()) &&
|
|
prev != null && "li".equals(prev.tagName())) {
|
|
e.remove();
|
|
prev.appendChild(e);
|
|
}
|
|
}
|
|
|
|
for (Element quote : doc.select("blockquote")) {
|
|
Element prev = quote.previousElementSibling();
|
|
if (prev != null && "br".equals(prev.tagName()))
|
|
prev.remove();
|
|
|
|
Element last = quote.children().last();
|
|
if (last != null && "br".equals(last.tagName()))
|
|
last.remove();
|
|
}
|
|
|
|
for (Element line : doc.select("hr")) {
|
|
Element next = line.nextElementSibling();
|
|
if (next != null && "br".equals(next.tagName()))
|
|
next.remove();
|
|
}
|
|
|
|
return doc.html();
|
|
}
|
|
|
|
private static Spanned reverseSpans(Spanned spanned) {
|
|
Object[] spans = spanned.getSpans(0, spanned.length(), Object.class);
|
|
Spannable reverse = Spannable.Factory.getInstance().newSpannable(spanned.toString());
|
|
if (spans != null && spans.length > 0)
|
|
for (int i = spans.length - 1; i >= 0; i--)
|
|
reverse.setSpan(
|
|
spans[i],
|
|
spanned.getSpanStart(spans[i]),
|
|
spanned.getSpanEnd(spans[i]),
|
|
spanned.getSpanFlags(spans[i]));
|
|
return reverse;
|
|
}
|
|
|
|
interface ImageGetterEx {
|
|
Drawable getDrawable(Element element);
|
|
}
|
|
}
|