1 /* 2 * Copyright (C) 2010 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); you may not 5 * use this file except in compliance with the License. You may obtain a copy of 6 * the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT 12 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the 13 * License for the specific language governing permissions and limitations under 14 * the License. 15 */ 16 17 package com.android.browser; 18 19 import android.content.Context; 20 import android.graphics.Canvas; 21 import android.util.AttributeSet; 22 import android.view.View; 23 import android.webkit.WebChromeClient; 24 import android.webkit.WebStorage; 25 import android.webkit.WebStorageClassic; 26 import android.webkit.WebView; 27 import android.webkit.WebViewClassic; 28 import android.webkit.WebViewClient; 29 30 import java.util.Map; 31 32 /** 33 * Manage WebView scroll events 34 */ 35 public class BrowserWebView extends WebView implements WebViewClassic.TitleBarDelegate { 36 37 public interface OnScrollChangedListener { onScrollChanged(int l, int t, int oldl, int oldt)38 void onScrollChanged(int l, int t, int oldl, int oldt); 39 } 40 41 private boolean mBackgroundRemoved = false; 42 private TitleBar mTitleBar; 43 private OnScrollChangedListener mOnScrollChangedListener; 44 private WebChromeClient mWebChromeClient; 45 private WebViewClient mWebViewClient; 46 47 /** 48 * @param context 49 * @param attrs 50 * @param defStyle 51 * @param javascriptInterfaces 52 */ BrowserWebView(Context context, AttributeSet attrs, int defStyle, Map<String, Object> javascriptInterfaces, boolean privateBrowsing)53 public BrowserWebView(Context context, AttributeSet attrs, int defStyle, 54 Map<String, Object> javascriptInterfaces, boolean privateBrowsing) { 55 super(context, attrs, defStyle, javascriptInterfaces, privateBrowsing); 56 } 57 58 /** 59 * @param context 60 * @param attrs 61 * @param defStyle 62 */ BrowserWebView( Context context, AttributeSet attrs, int defStyle, boolean privateBrowsing)63 public BrowserWebView( 64 Context context, AttributeSet attrs, int defStyle, boolean privateBrowsing) { 65 super(context, attrs, defStyle, privateBrowsing); 66 } 67 68 /** 69 * @param context 70 * @param attrs 71 */ BrowserWebView(Context context, AttributeSet attrs)72 public BrowserWebView(Context context, AttributeSet attrs) { 73 super(context, attrs); 74 } 75 76 /** 77 * @param context 78 */ BrowserWebView(Context context)79 public BrowserWebView(Context context) { 80 super(context); 81 } 82 isClassic()83 public static boolean isClassic() { 84 // Using WebStorage for convenience of access in a static method. 85 return WebStorage.getInstance() instanceof WebStorageClassic; 86 } 87 88 @Override setWebChromeClient(WebChromeClient client)89 public void setWebChromeClient(WebChromeClient client) { 90 mWebChromeClient = client; 91 super.setWebChromeClient(client); 92 } 93 getWebChromeClient()94 public WebChromeClient getWebChromeClient() { 95 return mWebChromeClient; 96 } 97 98 @Override setWebViewClient(WebViewClient client)99 public void setWebViewClient(WebViewClient client) { 100 mWebViewClient = client; 101 super.setWebViewClient(client); 102 } 103 getWebViewClient()104 public WebViewClient getWebViewClient() { 105 return mWebViewClient; 106 } 107 setTitleBar(TitleBar title)108 public void setTitleBar(TitleBar title) { 109 mTitleBar = title; 110 } 111 112 // From TitleBarDelegate 113 @Override getTitleHeight()114 public int getTitleHeight() { 115 return (mTitleBar != null) ? mTitleBar.getEmbeddedHeight() : 0; 116 } 117 118 // From TitleBarDelegate 119 @Override onSetEmbeddedTitleBar(final View title)120 public void onSetEmbeddedTitleBar(final View title) { 121 // TODO: Remove this method; it is never invoked. 122 } 123 hasTitleBar()124 public boolean hasTitleBar() { 125 return (mTitleBar != null); 126 } 127 128 @Override onDraw(Canvas c)129 protected void onDraw(Canvas c) { 130 super.onDraw(c); 131 if (!mBackgroundRemoved && getRootView().getBackground() != null) { 132 mBackgroundRemoved = true; 133 post(new Runnable() { 134 public void run() { 135 getRootView().setBackgroundDrawable(null); 136 } 137 }); 138 } 139 } 140 drawContent(Canvas c)141 public void drawContent(Canvas c) { 142 onDraw(c); 143 } 144 145 @Override onScrollChanged(int l, int t, int oldl, int oldt)146 protected void onScrollChanged(int l, int t, int oldl, int oldt) { 147 super.onScrollChanged(l, t, oldl, oldt); 148 if (mTitleBar != null) { 149 mTitleBar.onScrollChanged(); 150 } 151 if (mOnScrollChangedListener != null) { 152 mOnScrollChangedListener.onScrollChanged(l, t, oldl, oldt); 153 } 154 } 155 setOnScrollChangedListener(OnScrollChangedListener listener)156 public void setOnScrollChangedListener(OnScrollChangedListener listener) { 157 mOnScrollChangedListener = listener; 158 } 159 160 @Override showContextMenuForChild(View originalView)161 public boolean showContextMenuForChild(View originalView) { 162 return false; 163 } 164 165 @Override destroy()166 public void destroy() { 167 BrowserSettings.getInstance().stopManagingSettings(getSettings()); 168 super.destroy(); 169 } 170 171 } 172