mirror of https://github.com/M66B/FairEmail.git
345 lines
12 KiB
Java
345 lines
12 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 2018-2021 by Marcel Bokhorst (M66B)
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*/
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import android.content.Context;
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import android.content.SharedPreferences;
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import android.graphics.Bitmap;
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import android.net.Uri;
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import android.os.Build;
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import android.util.Pair;
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import android.view.InputDevice;
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import android.view.MotionEvent;
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import android.view.View;
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import android.webkit.DownloadListener;
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import android.webkit.RenderProcessGoneDetail;
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import android.webkit.WebSettings;
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import android.webkit.WebView;
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import android.webkit.WebViewClient;
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import androidx.preference.PreferenceManager;
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import androidx.webkit.WebSettingsCompat;
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import androidx.webkit.WebViewFeature;
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import static androidx.webkit.WebSettingsCompat.FORCE_DARK_OFF;
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import static androidx.webkit.WebSettingsCompat.FORCE_DARK_ON;
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public class WebViewEx extends WebView implements DownloadListener, View.OnLongClickListener {
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private int height;
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private IWebView intf;
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private Runnable onPageLoaded;
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private static final long PAGE_LOADED_FALLBACK_DELAY = 1500L; // milliseconds
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public WebViewEx(Context context) {
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super(context);
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SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
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boolean overview_mode = prefs.getBoolean("overview_mode", false);
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boolean safe_browsing = prefs.getBoolean("safe_browsing", false);
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boolean confirm_html = prefs.getBoolean("confirm_html", true);
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boolean html_dark = prefs.getBoolean("html_dark", confirm_html);
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setVerticalScrollBarEnabled(false);
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setHorizontalScrollBarEnabled(false);
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setOverScrollMode(View.OVER_SCROLL_NEVER);
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setDownloadListener(this);
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setOnLongClickListener(this);
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WebSettings settings = getSettings();
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settings.setUseWideViewPort(true);
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settings.setLoadWithOverviewMode(overview_mode);
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settings.setBuiltInZoomControls(true);
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settings.setDisplayZoomControls(false);
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settings.setLayoutAlgorithm(WebSettings.LayoutAlgorithm.TEXT_AUTOSIZING);
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settings.setAllowFileAccess(false);
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settings.setCacheMode(WebSettings.LOAD_CACHE_ELSE_NETWORK);
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settings.setMixedContentMode(WebSettings.MIXED_CONTENT_ALWAYS_ALLOW);
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if (WebViewEx.isFeatureSupported(WebViewFeature.SAFE_BROWSING_ENABLE))
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WebSettingsCompat.setSafeBrowsingEnabled(settings, safe_browsing);
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if (html_dark &&
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WebViewEx.isFeatureSupported(WebViewFeature.FORCE_DARK))
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WebSettingsCompat.setForceDark(settings,
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Helper.isDarkTheme(context) ? FORCE_DARK_ON : FORCE_DARK_OFF);
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}
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void init(int height, float size, Pair<Integer, Integer> position, IWebView intf) {
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Log.i("Init height=" + height + " size=" + size);
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this.height = (height == 0 ? getMinimumHeight() : height);
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setInitialScale(size == 0 ? 0 : Math.round(size * 100));
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if (position != null) {
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setScrollX(position.first);
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setScrollY(position.second);
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}
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this.intf = intf;
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setWebViewClient(new WebViewClient() {
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@Override
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public void onPageStarted(WebView view, String url, Bitmap favicon) {
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Log.i("Started url=" + url);
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}
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@Override
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public void onPageFinished(WebView view, String url) {
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Log.i("Finished url=" + url);
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}
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@Override
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public void onPageCommitVisible(WebView view, String url) {
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Log.i("Commit url=" + url + " runnable=" + (onPageLoaded != null));
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if (onPageLoaded != null) {
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ApplicationEx.getMainHandler().post(onPageLoaded);
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onPageLoaded = null;
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}
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}
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@Override
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public boolean onRenderProcessGone(WebView view, RenderProcessGoneDetail detail) {
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Log.e("Render process gone");
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if (onPageLoaded != null) {
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ApplicationEx.getMainHandler().post(onPageLoaded);
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onPageLoaded = null;
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}
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return super.onRenderProcessGone(view, detail);
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}
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public boolean shouldOverrideUrlLoading(WebView view, String url) {
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Log.i("Open url=" + url);
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return intf.onOpenLink(url);
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}
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@Override
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public void onScaleChanged(WebView view, float oldScale, float newScale) {
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Log.i("Changed scale=" + newScale);
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intf.onScaleChanged(newScale);
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}
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});
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if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M)
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setOnScrollChangeListener(new View.OnScrollChangeListener() {
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@Override
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public void onScrollChange(View v, int scrollX, int scrollY, int oldScrollX, int oldScrollY) {
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Log.i("Scroll (x,y)=" + scrollX + "," + scrollY);
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intf.onScrollChange(scrollX, scrollY);
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}
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});
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}
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void setOnPageLoaded(Runnable runnable) {
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Log.i("Set on page finished");
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onPageLoaded = runnable;
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ApplicationEx.getMainHandler().postDelayed(new Runnable() {
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@Override
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public void run() {
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try {
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if (onPageLoaded != null) {
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Log.i("Page loaded fallback");
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onPageLoaded.run();
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onPageLoaded = null;
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}
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} catch (Throwable ex) {
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Log.e(ex);
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}
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}
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}, PAGE_LOADED_FALLBACK_DELAY);
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}
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void setImages(boolean show_images, boolean inline) {
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WebSettings settings = getSettings();
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settings.setLoadsImagesAutomatically(show_images || inline);
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settings.setBlockNetworkLoads(!show_images);
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settings.setBlockNetworkImage(!show_images);
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}
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@Override
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protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
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if (height > getMinimumHeight())
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super.onMeasure(widthMeasureSpec, MeasureSpec.makeMeasureSpec(height, MeasureSpec.AT_MOST));
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else
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super.onMeasure(widthMeasureSpec, heightMeasureSpec); // Unspecified
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int mh = getMeasuredHeight();
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Log.i("Measured height=" + mh + " last=" + height);
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if (mh == 0)
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setMeasuredDimension(getMeasuredWidth(), height);
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}
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@Override
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protected void onSizeChanged(int w, int h, int ow, int oh) {
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super.onSizeChanged(w, h, ow, oh);
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Log.i("Size changed height=" + h);
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this.intf.onSizeChanged(w, h, ow, oh);
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}
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@Override
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protected boolean overScrollBy(int deltaX, int deltaY, int scrollX, int scrollY, int scrollRangeX, int scrollRangeY, int maxOverScrollX, int maxOverScrollY, boolean isTouchEvent) {
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final int overScrollMode = getOverScrollMode();
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final boolean canScrollHorizontal =
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computeHorizontalScrollRange() > computeHorizontalScrollExtent();
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final boolean canScrollVertical =
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computeVerticalScrollRange() > computeVerticalScrollExtent();
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final boolean overScrollHorizontal = overScrollMode == OVER_SCROLL_ALWAYS ||
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(overScrollMode == OVER_SCROLL_IF_CONTENT_SCROLLS && canScrollHorizontal);
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final boolean overScrollVertical = overScrollMode == OVER_SCROLL_ALWAYS ||
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(overScrollMode == OVER_SCROLL_IF_CONTENT_SCROLLS && canScrollVertical);
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int newScrollX = scrollX + deltaX;
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if (!overScrollHorizontal) {
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maxOverScrollX = 0;
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}
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int newScrollY = scrollY + deltaY;
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if (!overScrollVertical) {
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maxOverScrollY = 0;
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}
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// Clamp values if at the limits and record
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final int left = -maxOverScrollX;
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final int right = maxOverScrollX + scrollRangeX;
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final int top = -maxOverScrollY;
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final int bottom = maxOverScrollY + scrollRangeY;
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boolean clampedX = false;
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if (newScrollX > right) {
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newScrollX = right;
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clampedX = true;
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} else if (newScrollX < left) {
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newScrollX = left;
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clampedX = true;
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}
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boolean clampedY = false;
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if (newScrollY > bottom) {
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newScrollY = bottom;
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clampedY = true;
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} else if (newScrollY < top) {
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newScrollY = top;
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clampedY = true;
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}
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Log.i("onOverScrolled clamped=" + clampedY + " new=" + newScrollY + " dy=" + deltaY);
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intf.onOverScrolled(scrollX, scrollY, deltaX, deltaY, clampedX, clampedY);
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return super.overScrollBy(deltaX, deltaY, scrollX, scrollY, scrollRangeX, scrollRangeY, maxOverScrollX, maxOverScrollY, isTouchEvent);
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}
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@Override
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public void onDownloadStart(
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String url, String userAgent, String contentDisposition, String mimetype, long contentLength) {
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Log.i("Download url=" + url + " mime type=" + mimetype);
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Uri uri = Uri.parse(url);
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if ("cid".equals(uri.getScheme()) || "data".equals(uri.getScheme()))
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return;
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Helper.view(getContext(), uri, true);
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}
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@Override
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public boolean onLongClick(View view) {
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WebView.HitTestResult result = ((WebView) view).getHitTestResult();
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if (result.getType() == WebView.HitTestResult.IMAGE_TYPE ||
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result.getType() == WebView.HitTestResult.SRC_IMAGE_ANCHOR_TYPE) {
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Log.i("Long press url=" + result.getExtra());
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Uri uri = Uri.parse(result.getExtra());
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if ("cid".equals(uri.getScheme()) || "data".equals(uri.getScheme()))
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return false;
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Helper.view(getContext(), uri, true);
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return true;
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}
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return false;
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}
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@Override
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public boolean onGenericMotionEvent(MotionEvent event) {
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if (event.getAction() == MotionEvent.ACTION_SCROLL &&
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(event.getSource() & InputDevice.SOURCE_MOUSE) != 0)
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return false;
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return super.onGenericMotionEvent(event);
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}
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public boolean isZoomedX() {
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int xtend = computeHorizontalScrollExtent();
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if (xtend != 0) {
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float xscale = computeHorizontalScrollRange() / (float) xtend;
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if (xscale > 1.2)
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return true;
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}
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return false;
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}
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public boolean isZoomedY() {
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int ytend = computeVerticalScrollExtent();
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if (ytend != 0) {
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float yscale = computeVerticalScrollRange() / (float) ytend;
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if (yscale > 1.2)
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return true;
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}
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return false;
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}
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public static boolean isFeatureSupported(String feature) {
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try {
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return WebViewFeature.isFeatureSupported(feature);
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} catch (Throwable ex) {
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/*
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java.lang.ExceptionInInitializerError
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at androidx.webkit.internal.WebViewGlueCommunicator.getFactory(SourceFile:1)
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at androidx.webkit.internal.WebViewFeatureInternal$LAZY_HOLDER.<clinit>(SourceFile:2)
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at androidx.webkit.internal.WebViewFeatureInternal.isSupportedByWebView(SourceFile:1)
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at androidx.webkit.internal.WebViewFeatureInternal.isSupported(SourceFile:13)
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at androidx.webkit.internal.WebViewFeatureInternal.isSupported(SourceFile:11)
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at androidx.webkit.internal.WebViewFeatureInternal.isSupported(SourceFile:4)
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at androidx.webkit.WebViewFeature.isFeatureSupported(SourceFile:1)
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*/
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Log.w(ex);
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return false;
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}
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}
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interface IWebView {
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void onSizeChanged(int w, int h, int ow, int oh);
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void onScaleChanged(float newScale);
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void onScrollChange(int scrollX, int scrollY);
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void onOverScrolled(int scrollX, int scrollY, int dx, int dy, boolean clampedX, boolean clampedY);
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boolean onOpenLink(String url);
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}
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}
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