package eu.faircode.email;
/*
This file is part of FairEmail.
FairEmail is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
FairEmail is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with FairEmail. If not, see .
Copyright 2018-2021 by Marcel Bokhorst (M66B)
*/
import android.app.Activity;
import android.content.Context;
import android.content.DialogInterface;
import android.content.SharedPreferences;
import android.graphics.Typeface;
import android.os.Build;
import android.text.Editable;
import android.text.Layout;
import android.text.SpannableString;
import android.text.SpannableStringBuilder;
import android.text.Spanned;
import android.text.TextUtils;
import android.text.style.AlignmentSpan;
import android.text.style.BulletSpan;
import android.text.style.CharacterStyle;
import android.text.style.ForegroundColorSpan;
import android.text.style.ImageSpan;
import android.text.style.ParagraphStyle;
import android.text.style.QuoteSpan;
import android.text.style.RelativeSizeSpan;
import android.text.style.StrikethroughSpan;
import android.text.style.StyleSpan;
import android.text.style.TypefaceSpan;
import android.text.style.URLSpan;
import android.text.style.UnderlineSpan;
import android.util.Pair;
import android.view.MenuItem;
import android.view.SubMenu;
import android.view.View;
import android.view.inputmethod.InputMethodManager;
import android.widget.EditText;
import androidx.appcompat.widget.PopupMenu;
import androidx.lifecycle.LifecycleOwner;
import androidx.preference.PreferenceManager;
import com.flask.colorpicker.ColorPickerView;
import com.flask.colorpicker.builder.ColorPickerClickListener;
import com.flask.colorpicker.builder.ColorPickerDialogBuilder;
import java.util.ArrayList;
import java.util.List;
import java.util.Locale;
public class StyleHelper {
static boolean apply(int action, LifecycleOwner owner, View anchor, EditText etBody, Object... args) {
Log.i("Style action=" + action);
try {
int start = etBody.getSelectionStart();
int end = etBody.getSelectionEnd();
if (start < 0)
start = 0;
if (end < 0)
end = 0;
if (start > end) {
int tmp = start;
start = end;
end = tmp;
}
SpannableString ss = new SpannableString(etBody.getText());
if (action == R.id.menu_bold || action == R.id.menu_italic) {
int style = (action == R.id.menu_bold ? Typeface.BOLD : Typeface.ITALIC);
boolean has = false;
for (StyleSpan span : ss.getSpans(start, end, StyleSpan.class))
if (span.getStyle() == style) {
has = true;
ss.removeSpan(span);
}
if (!has)
ss.setSpan(new StyleSpan(style), start, end, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
etBody.setText(ss);
etBody.setSelection(start, end);
return true;
} else if (action == R.id.menu_underline) {
boolean has = false;
for (UnderlineSpan span : ss.getSpans(start, end, UnderlineSpan.class)) {
has = true;
ss.removeSpan(span);
}
if (!has)
ss.setSpan(new UnderlineSpan(), start, end, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
etBody.setText(ss);
etBody.setSelection(start, end);
return true;
} else if (action == R.id.menu_style) {
final int s = start;
final int e = end;
final SpannableStringBuilder t = new SpannableStringBuilder(ss);
PopupMenuLifecycle popupMenu = new PopupMenuLifecycle(anchor.getContext(), owner, anchor);
popupMenu.inflate(R.menu.popup_style);
String[] fontNames = anchor.getResources().getStringArray(R.array.fontNameNames);
SubMenu smenu = popupMenu.getMenu().findItem(R.id.menu_style_font).getSubMenu();
for (int i = 0; i < fontNames.length; i++)
smenu.add(R.id.group_style_font, i, 0, fontNames[i]);
smenu.add(R.id.group_style_font, fontNames.length, 0, R.string.title_style_font_default);
popupMenu.setOnMenuItemClickListener(new PopupMenu.OnMenuItemClickListener() {
@Override
public boolean onMenuItemClick(MenuItem item) {
try {
int groupId = item.getGroupId();
if (groupId == R.id.group_style_size) {
return setSize(item);
} else if (groupId == R.id.group_style_color) {
return setColor(item);
} else if (groupId == R.id.group_style_align) {
return setAlignment(item);
} else if (groupId == R.id.group_style_list) {
return setList(item);
} else if (groupId == R.id.group_style_font) {
return setFont(item);
} else if (groupId == R.id.group_style_blockquote) {
return setBlockQuote(item);
} else if (groupId == R.id.group_style_strikethrough) {
return setStrikeThrough(item);
} else if (groupId == R.id.group_style_clear) {
return clear(item);
}
return false;
} catch (Throwable ex) {
Log.e(ex);
return false;
}
}
private boolean setSize(MenuItem item) {
RelativeSizeSpan[] spans = t.getSpans(s, e, RelativeSizeSpan.class);
for (RelativeSizeSpan span : spans)
t.removeSpan(span);
Float size;
if (item.getItemId() == R.id.menu_style_size_small)
size = 0.8f;
else if (item.getItemId() == R.id.menu_style_size_large)
size = 1.25f;
else
size = null;
if (size != null)
t.setSpan(new RelativeSizeSpan(size), s, e, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
etBody.setText(t);
etBody.setSelection(s, e);
return true;
}
private boolean setColor(MenuItem item) {
InputMethodManager imm = (InputMethodManager) etBody.getContext().getSystemService(Activity.INPUT_METHOD_SERVICE);
if (imm != null)
imm.hideSoftInputFromWindow(etBody.getWindowToken(), 0);
Context context = etBody.getContext();
int editTextColor = Helper.resolveColor(context, android.R.attr.editTextColor);
ColorPickerDialogBuilder builder = ColorPickerDialogBuilder
.with(context)
.setTitle(R.string.title_color)
.showColorEdit(true)
.setColorEditTextColor(editTextColor)
.wheelType(ColorPickerView.WHEEL_TYPE.FLOWER)
.density(6)
.lightnessSliderOnly()
.setPositiveButton(android.R.string.ok, new ColorPickerClickListener() {
@Override
public void onClick(DialogInterface dialog, int selectedColor, Integer[] allColors) {
_setColor(selectedColor);
}
})
.setNegativeButton(R.string.title_reset, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
_setColor(null);
}
});
builder.build().show();
return true;
}
private void _setColor(Integer color) {
for (ForegroundColorSpan span : t.getSpans(s, e, ForegroundColorSpan.class))
t.removeSpan(span);
if (color != null)
t.setSpan(new ForegroundColorSpan(color), s, e, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
etBody.setText(t);
etBody.setSelection(s, e);
}
private boolean setAlignment(MenuItem item) {
Pair paragraph = ensureParagraph(t, s, e);
int start = paragraph.first;
int end = paragraph.second;
AlignmentSpan[] spans = t.getSpans(start, end, AlignmentSpan.class);
for (AlignmentSpan span : spans)
t.removeSpan(span);
Layout.Alignment alignment = null;
boolean ltr = (TextUtils.getLayoutDirectionFromLocale(Locale.getDefault()) == View.LAYOUT_DIRECTION_LTR);
int itemId = item.getItemId();
if (itemId == R.id.menu_style_align_start) {
alignment = (ltr ? Layout.Alignment.ALIGN_NORMAL : Layout.Alignment.ALIGN_OPPOSITE);
} else if (itemId == R.id.menu_style_align_center) {
alignment = Layout.Alignment.ALIGN_CENTER;
} else if (itemId == R.id.menu_style_align_end) {
alignment = (ltr ? Layout.Alignment.ALIGN_OPPOSITE : Layout.Alignment.ALIGN_NORMAL);
}
if (alignment != null)
t.setSpan(new AlignmentSpan.Standard(alignment),
start, end, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE | Spanned.SPAN_PARAGRAPH);
etBody.setText(t);
etBody.setSelection(start, end);
return true;
}
private boolean setList(MenuItem item) {
Context context = etBody.getContext();
int colorAccent = Helper.resolveColor(context, R.attr.colorAccent);
int dp3 = Helper.dp2pixels(context, 3);
int dp6 = Helper.dp2pixels(context, 6);
SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
int message_zoom = prefs.getInt("message_zoom", 100);
float textSize = Helper.getTextSize(context, 0) * message_zoom / 100f;
Pair paragraph = ensureParagraph(t, s, e);
int start = paragraph.first;
int end = paragraph.second;
// Remove existing bullets
BulletSpan[] spans = t.getSpans(start, end, BulletSpan.class);
for (BulletSpan span : spans)
t.removeSpan(span);
int i = start;
int j = start + 1;
int index = 1;
while (j < end) {
if (i > 0 && t.charAt(i - 1) == '\n' && t.charAt(j) == '\n') {
Log.i("Insert " + i + "..." + (j + 1) + " size=" + end);
if (item.getItemId() == R.id.menu_style_list_bullets)
if (Build.VERSION.SDK_INT < Build.VERSION_CODES.P)
t.setSpan(new BulletSpan(dp6, colorAccent), i, j + 1, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE | Spanned.SPAN_PARAGRAPH);
else
t.setSpan(new BulletSpan(dp6, colorAccent, dp3), i, j + 1, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE | Spanned.SPAN_PARAGRAPH);
else
t.setSpan(new NumberSpan(dp6, colorAccent, textSize, index++), i, j + 1, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE | Spanned.SPAN_PARAGRAPH);
i = j + 1;
}
j++;
}
etBody.setText(t);
etBody.setSelection(start, end);
return true;
}
private boolean setFont(MenuItem item) {
TypefaceSpan[] spans = t.getSpans(s, e, TypefaceSpan.class);
for (TypefaceSpan span : spans)
t.removeSpan(span);
int id = item.getItemId();
String[] names = anchor.getResources().getStringArray(R.array.fontNameValues);
String face = (id < names.length ? names[id] : null);
if (face != null)
t.setSpan(new TypefaceSpan(face), s, e, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
etBody.setText(t);
etBody.setSelection(s, e);
return true;
}
private boolean setBlockQuote(MenuItem item) {
Context context = etBody.getContext();
int colorPrimary = Helper.resolveColor(context, R.attr.colorPrimary);
int dp3 = Helper.dp2pixels(context, 3);
int dp6 = Helper.dp2pixels(context, 6);
Pair paragraph = ensureParagraph(t, s, e);
int start = paragraph.first;
int end = paragraph.second;
QuoteSpan[] spans = t.getSpans(s, e, QuoteSpan.class);
for (QuoteSpan span : spans)
t.removeSpan(span);
QuoteSpan q;
if (Build.VERSION.SDK_INT < Build.VERSION_CODES.P)
q = new QuoteSpan(colorPrimary);
else
q = new QuoteSpan(colorPrimary, dp3, dp6);
t.setSpan(q, start, end, Spanned.SPAN_INCLUSIVE_EXCLUSIVE);
etBody.setText(t);
etBody.setSelection(start, end);
return true;
}
private boolean setStrikeThrough(MenuItem item) {
boolean has = false;
for (StrikethroughSpan span : t.getSpans(s, e, StrikethroughSpan.class)) {
has = true;
t.removeSpan(span);
}
if (!has)
t.setSpan(new StrikethroughSpan(), s, e, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
etBody.setText(t);
etBody.setSelection(s, e);
return true;
}
private boolean clear(MenuItem item) {
int start = s;
int end = e;
// Expand to paragraph (block quotes)
if (end + 1 < t.length() && t.charAt(end) == '\n')
end++;
for (Object span : t.getSpans(start, end, Object.class))
if (!(span instanceof ImageSpan)) {
int sstart = t.getSpanStart(span);
int send = t.getSpanEnd(span);
int flags = t.getSpanFlags(span);
if (sstart < start && send > start)
setSpan(t, span, sstart, start, flags, etBody.getContext());
if (sstart < end && send > end)
setSpan(t, span, end, send, flags, etBody.getContext());
t.removeSpan(span);
}
etBody.setText(t);
etBody.setSelection(s, e);
return true;
}
});
popupMenu.show();
return true;
} else if (action == R.id.menu_link) {
String url = (String) args[0];
List