1 /* 2 * Copyright (C) 2008 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of 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, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 18 package com.android.browser; 19 20 import android.content.Context; 21 import android.graphics.Canvas; 22 import android.graphics.Color; 23 import android.graphics.Picture; 24 import android.util.AttributeSet; 25 import android.view.View; 26 import android.webkit.WebView; 27 import android.widget.ImageView; 28 29 import android.util.Log; 30 31 /** 32 * This class is used by ImageAdapter to draw a representation of each tab. It 33 * overrides ImageView so it can be used for the new tab image as well. 34 */ 35 public class FakeWebView extends ImageView { 36 private TabControl.PickerData mPickerData; 37 private boolean mUsesResource; 38 FakeWebView(Context context)39 public FakeWebView(Context context) { 40 this(context, null); 41 } 42 FakeWebView(Context context, AttributeSet attrs)43 public FakeWebView(Context context, AttributeSet attrs) { 44 this(context, attrs, 0); 45 } 46 FakeWebView(Context context, AttributeSet attrs, int defStyle)47 public FakeWebView(Context context, AttributeSet attrs, int defStyle) { 48 super(context, attrs, defStyle); 49 } 50 51 @Override onDraw(Canvas canvas)52 protected void onDraw(Canvas canvas) { 53 if (mUsesResource) { 54 super.onDraw(canvas); 55 } else { 56 // Always draw white behind the picture just in case the picture 57 // draws nothing. 58 // FIXME: We used to draw white only when the WebView was null but 59 // sometimes the picture was empty. So now we always draw white. It 60 // would be nice to know if the picture is empty so we can avoid 61 // drawing white. 62 canvas.drawColor(Color.WHITE); 63 if (mPickerData != null) { 64 final Picture p = mPickerData.mPicture; 65 if (p != null) { 66 canvas.save(); 67 float scale = getWidth() * mPickerData.mScale 68 / mPickerData.mWidth; 69 // Check for NaN and infinity. 70 if (Float.isNaN(scale) || Float.isInfinite(scale)) { 71 scale = 1.0f; 72 } 73 canvas.scale(scale, scale); 74 canvas.translate(-mPickerData.mScrollX, 75 -mPickerData.mScrollY); 76 canvas.drawPicture(p); 77 canvas.restore(); 78 } 79 } 80 } 81 } 82 83 @Override setImageResource(int resId)84 public void setImageResource(int resId) { 85 mUsesResource = true; 86 mPickerData = null; 87 super.setImageResource(resId); 88 } 89 90 /** 91 * Set a WebView for this FakeWebView to represent. 92 * @param t The tab whose picture and other data will be used in onDraw. 93 */ setTab(TabControl.Tab t)94 public void setTab(TabControl.Tab t) { 95 mUsesResource = false; 96 if (mPickerData != null) { 97 // Clear the old tab's view first 98 mPickerData.mFakeWebView = null; 99 } 100 mPickerData = null; 101 if (t != null && t.getPickerData() != null) { 102 mPickerData = t.getPickerData(); 103 mPickerData.mFakeWebView = this; 104 } 105 } 106 } 107