1// Copyright (c) 2012 The Chromium Authors. All rights reserved. 2// Use of this source code is governed by a BSD-style license that can be 3// found in the LICENSE file. 4 5package org.chromium.content.browser; 6 7import android.content.ActivityNotFoundException; 8import android.content.Context; 9import android.content.Intent; 10import android.graphics.RectF; 11import android.util.Log; 12import android.view.ActionMode; 13import android.view.KeyEvent; 14 15import org.chromium.content.browser.SelectActionModeCallback.ActionHandler; 16 17import java.net.URISyntaxException; 18 19/** 20 * Main callback class used by ContentView. 21 * 22 * This contains the superset of callbacks required to implement the browser UI and the callbacks 23 * required to implement the WebView API. 24 * The memory and reference ownership of this class is unusual - see the .cc file and ContentView 25 * for more details. 26 * 27 * TODO(mkosiba): Rid this guy of default implementations. This class is used by both WebView and 28 * the browser and we don't want a the browser-specific default implementation to accidentally leak 29 * over to WebView. 30 */ 31public class ContentViewClient { 32 // Tag used for logging. 33 private static final String TAG = "ContentViewClient"; 34 35 public void onUpdateTitle(String title) { 36 } 37 38 /** 39 * Called whenever the background color of the page changes as notified by WebKit. 40 * @param color The new ARGB color of the page background. 41 */ 42 public void onBackgroundColorChanged(int color) { 43 } 44 45 /** 46 * Notifies the client that the position of the top controls has changed. 47 * @param topControlsOffsetYPix The Y offset of the top controls in physical pixels. 48 * @param contentOffsetYPix The Y offset of the content in physical pixels. 49 * @param overdrawBottomHeightPix The overdraw height. 50 */ 51 public void onOffsetsForFullscreenChanged( 52 float topControlsOffsetYPix, float contentOffsetYPix, float overdrawBottomHeightPix) { 53 } 54 55 /** 56 * Notifies the client that the renderer backing the ContentView has crashed. 57 * @param crashedWhileOomProtected True iff the renderer died while being bound with a high 58 * priority binding, which indicates that it was probably an actual crash (as opposed to the 59 * renderer being killed by the OS out-of-memory killer). 60 */ 61 public void onRendererCrash(boolean processWasOomProtected) { 62 } 63 64 public boolean shouldOverrideKeyEvent(KeyEvent event) { 65 int keyCode = event.getKeyCode(); 66 // We need to send almost every key to WebKit. However: 67 // 1. We don't want to block the device on the renderer for 68 // some keys like menu, home, call. 69 // 2. There are no WebKit equivalents for some of these keys 70 // (see app/keyboard_codes_win.h) 71 // Note that these are not the same set as KeyEvent.isSystemKey: 72 // for instance, AKEYCODE_MEDIA_* will be dispatched to webkit. 73 if (keyCode == KeyEvent.KEYCODE_MENU || 74 keyCode == KeyEvent.KEYCODE_HOME || 75 keyCode == KeyEvent.KEYCODE_BACK || 76 keyCode == KeyEvent.KEYCODE_CALL || 77 keyCode == KeyEvent.KEYCODE_ENDCALL || 78 keyCode == KeyEvent.KEYCODE_POWER || 79 keyCode == KeyEvent.KEYCODE_HEADSETHOOK || 80 keyCode == KeyEvent.KEYCODE_CAMERA || 81 keyCode == KeyEvent.KEYCODE_FOCUS || 82 keyCode == KeyEvent.KEYCODE_VOLUME_DOWN || 83 keyCode == KeyEvent.KEYCODE_VOLUME_MUTE || 84 keyCode == KeyEvent.KEYCODE_VOLUME_UP) { 85 return true; 86 } 87 88 // We also have to intercept some shortcuts before we send them to the ContentView. 89 if (event.isCtrlPressed() && ( 90 keyCode == KeyEvent.KEYCODE_TAB || 91 keyCode == KeyEvent.KEYCODE_W || 92 keyCode == KeyEvent.KEYCODE_F4)) { 93 return true; 94 } 95 96 return false; 97 } 98 99 // Called when an ImeEvent is sent to the page. Can be used to know when some text is entered 100 // in a page. 101 public void onImeEvent() { 102 } 103 104 /** 105 * Notified when a change to the IME was requested. 106 * 107 * @param requestShow Whether the IME was requested to be shown (may already be showing 108 * though). 109 */ 110 public void onImeStateChangeRequested(boolean requestShow) { 111 } 112 113 // TODO (dtrainor): Should expose getScrollX/Y from ContentView or make 114 // computeHorizontalScrollOffset()/computeVerticalScrollOffset() public. 115 /** 116 * Gives the UI the chance to override each scroll event. 117 * @param dx The amount scrolled in the X direction (in physical pixels). 118 * @param dy The amount scrolled in the Y direction (in physical pixels). 119 * @param scrollX The current X scroll offset (in physical pixels). 120 * @param scrollY The current Y scroll offset (in physical pixels). 121 * @return Whether or not the UI consumed and handled this event. 122 */ 123 public boolean shouldOverrideScroll(float dx, float dy, float scrollX, float scrollY) { 124 return false; 125 } 126 127 /** 128 * Returns an ActionMode.Callback for in-page selection. 129 */ 130 public ActionMode.Callback getSelectActionModeCallback( 131 Context context, ActionHandler actionHandler, boolean incognito) { 132 return new SelectActionModeCallback(context, actionHandler, incognito); 133 } 134 135 /** 136 * Called when the contextual ActionBar is shown. 137 */ 138 public void onContextualActionBarShown() { 139 } 140 141 /** 142 * Called when the contextual ActionBar is hidden. 143 */ 144 public void onContextualActionBarHidden() { 145 } 146 147 /** 148 * Called when a new content intent is requested to be started. 149 */ 150 public void onStartContentIntent(Context context, String intentUrl) { 151 Intent intent; 152 // Perform generic parsing of the URI to turn it into an Intent. 153 try { 154 intent = Intent.parseUri(intentUrl, Intent.URI_INTENT_SCHEME); 155 } catch (URISyntaxException ex) { 156 Log.w(TAG, "Bad URI " + intentUrl + ": " + ex.getMessage()); 157 return; 158 } 159 160 try { 161 context.startActivity(intent); 162 } catch (ActivityNotFoundException ex) { 163 Log.w(TAG, "No application can handle " + intentUrl); 164 } 165 } 166 167 public void onExternalVideoSurfaceRequested(int playerId) { 168 } 169 170 public void onGeometryChanged(int playerId, RectF rect) { 171 } 172 173 public ContentVideoViewClient getContentVideoViewClient() { 174 return null; 175 } 176} 177