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.WebView; 24 25 import java.util.Map; 26 27 /** 28 * Manage WebView scroll events 29 */ 30 public class BrowserWebView extends WebView { 31 32 public interface OnScrollChangedListener { onScrollChanged(int l, int t, int oldl, int oldt)33 void onScrollChanged(int l, int t, int oldl, int oldt); 34 } 35 36 private boolean mBackgroundRemoved = false; 37 private TitleBar mTitleBar; 38 private OnScrollChangedListener mOnScrollChangedListener; 39 40 /** 41 * @param context 42 * @param attrs 43 * @param defStyle 44 * @param javascriptInterfaces 45 */ BrowserWebView(Context context, AttributeSet attrs, int defStyle, Map<String, Object> javascriptInterfaces, boolean privateBrowsing)46 public BrowserWebView(Context context, AttributeSet attrs, int defStyle, 47 Map<String, Object> javascriptInterfaces, boolean privateBrowsing) { 48 super(context, attrs, defStyle, javascriptInterfaces, privateBrowsing); 49 } 50 51 /** 52 * @param context 53 * @param attrs 54 * @param defStyle 55 */ BrowserWebView( Context context, AttributeSet attrs, int defStyle, boolean privateBrowsing)56 public BrowserWebView( 57 Context context, AttributeSet attrs, int defStyle, boolean privateBrowsing) { 58 super(context, attrs, defStyle, privateBrowsing); 59 } 60 61 /** 62 * @param context 63 * @param attrs 64 */ BrowserWebView(Context context, AttributeSet attrs)65 public BrowserWebView(Context context, AttributeSet attrs) { 66 super(context, attrs); 67 } 68 69 /** 70 * @param context 71 */ BrowserWebView(Context context)72 public BrowserWebView(Context context) { 73 super(context); 74 } 75 76 @Override getTitleHeight()77 protected int getTitleHeight() { 78 return (mTitleBar != null) ? mTitleBar.getEmbeddedHeight() : 0; 79 } 80 hideEmbeddedTitleBar()81 void hideEmbeddedTitleBar() { 82 scrollBy(0, getVisibleTitleHeight()); 83 } 84 85 @Override setEmbeddedTitleBar(final View title)86 public void setEmbeddedTitleBar(final View title) { 87 super.setEmbeddedTitleBar(title); 88 mTitleBar = (TitleBar) title; 89 } 90 hasTitleBar()91 public boolean hasTitleBar() { 92 return (mTitleBar != null); 93 } 94 95 @Override onDraw(Canvas c)96 protected void onDraw(Canvas c) { 97 super.onDraw(c); 98 if (!mBackgroundRemoved && getRootView().getBackground() != null) { 99 mBackgroundRemoved = true; 100 post(new Runnable() { 101 public void run() { 102 getRootView().setBackgroundDrawable(null); 103 } 104 }); 105 } 106 } 107 drawContent(Canvas c)108 public void drawContent(Canvas c) { 109 onDraw(c); 110 } 111 112 @Override onScrollChanged(int l, int t, int oldl, int oldt)113 protected void onScrollChanged(int l, int t, int oldl, int oldt) { 114 super.onScrollChanged(l, t, oldl, oldt); 115 if (mOnScrollChangedListener != null) { 116 mOnScrollChangedListener.onScrollChanged(l, t, oldl, oldt); 117 } 118 } 119 setOnScrollChangedListener(OnScrollChangedListener listener)120 public void setOnScrollChangedListener(OnScrollChangedListener listener) { 121 mOnScrollChangedListener = listener; 122 } 123 124 @Override showContextMenuForChild(View originalView)125 public boolean showContextMenuForChild(View originalView) { 126 return false; 127 } 128 129 } 130