mirror of https://github.com/moparisthebest/k-9
119 lines
4.1 KiB
Java
119 lines
4.1 KiB
Java
package com.fsck.k9.view;
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import android.content.Context;
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import android.os.Build;
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import android.util.AttributeSet;
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import android.util.Log;
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import android.view.KeyEvent;
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import android.webkit.WebSettings;
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import android.webkit.WebView;
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import android.widget.Toast;
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import com.fsck.k9.K9;
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import com.fsck.k9.R;
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import java.lang.reflect.Method;
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public class MessageWebView extends WebView {
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/**
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* We use WebSettings.getBlockNetworkLoads() to prevent the WebView that displays email
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* bodies from loading external resources over the network. Unfortunately this method
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* isn't exposed via the official Android API. That's why we use reflection to be able
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* to call the method.
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*/
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public static final Method mGetBlockNetworkLoads = K9.getMethod(WebSettings.class, "setBlockNetworkLoads");
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public MessageWebView(Context context) {
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super(context);
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}
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public MessageWebView(Context context, AttributeSet attrs) {
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super(context, attrs);
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}
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public MessageWebView(Context context, AttributeSet attrs, int defStyle) {
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super(context, attrs, defStyle);
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}
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/**
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* Configure a web view to load or not load network data. A <b>true</b> setting here means that
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* network data will be blocked.
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* @param shouldBlockNetworkData True if network data should be blocked, false to allow network data.
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*/
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public void blockNetworkData(final boolean shouldBlockNetworkData) {
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// Sanity check to make sure we don't blow up.
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if (getSettings() == null) {
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return;
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}
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// Block network loads.
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if (mGetBlockNetworkLoads != null) {
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try {
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mGetBlockNetworkLoads.invoke(getSettings(), shouldBlockNetworkData);
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} catch (Exception e) {
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Log.e(K9.LOG_TAG, "Error on invoking WebSettings.setBlockNetworkLoads()", e);
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}
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}
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// Block network images.
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getSettings().setBlockNetworkImage(shouldBlockNetworkData);
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}
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/**
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* Configure a {@link android.webkit.WebView} to display a Message. This method takes into account a user's
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* preferences when configuring the view. This message is used to view a message and to display a message being
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* replied to.
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*/
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public void configure() {
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this.setVerticalScrollBarEnabled(true);
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this.setVerticalScrollbarOverlay(true);
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this.setScrollBarStyle(SCROLLBARS_INSIDE_OVERLAY);
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final WebSettings webSettings = this.getSettings();
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webSettings.setCacheMode(WebSettings.LOAD_NO_CACHE);
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webSettings.setSupportZoom(true);
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webSettings.setJavaScriptEnabled(false);
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webSettings.setLoadsImagesAutomatically(true);
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webSettings.setRenderPriority(WebSettings.RenderPriority.HIGH);
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if (K9.zoomControlsEnabled()) {
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webSettings.setBuiltInZoomControls(true);
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}
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// SINGLE_COLUMN layout was broken on Android < 2.2, so we
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// administratively disable it
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if (
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(Integer.parseInt(Build.VERSION.SDK) > 7)
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&& K9.mobileOptimizedLayout()) {
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webSettings.setLayoutAlgorithm(WebSettings.LayoutAlgorithm.SINGLE_COLUMN);
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} else {
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webSettings.setLayoutAlgorithm(WebSettings.LayoutAlgorithm.NARROW_COLUMNS);
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}
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webSettings.setTextSize(K9.getFontSizes().getMessageViewContent());
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// Disable network images by default. This is overriden by preferences.
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blockNetworkData(true);
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}
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/*
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* Emulate the shift key being pressed to trigger the text selection mode
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* of a WebView.
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*/
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@Override
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public void emulateShiftHeld() {
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try {
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KeyEvent shiftPressEvent = new KeyEvent(0, 0, KeyEvent.ACTION_DOWN,
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KeyEvent.KEYCODE_SHIFT_LEFT, 0, 0);
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shiftPressEvent.dispatch(this);
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Toast.makeText(getContext() , R.string.select_text_now, Toast.LENGTH_SHORT).show();
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} catch (Exception e) {
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Log.e(K9.LOG_TAG, "Exception in emulateShiftHeld()", e);
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}
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}
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}
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