1 /* 2 * Copyright (C) 2011 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 package com.android.browser.preferences; 18 19 import android.content.Context; 20 import android.text.TextUtils; 21 import android.util.AttributeSet; 22 import android.webkit.WebSettings; 23 24 import com.android.browser.BrowserSettings; 25 import com.android.browser.WebViewProperties; 26 27 public class InvertedContrastPreview extends WebViewPreview { 28 29 static final String IMG_ROOT = "content://com.android.browser.home/res/raw/"; 30 static final String[] THUMBS = new String[] { 31 "thumb_google", 32 "thumb_amazon", 33 "thumb_cnn", 34 "thumb_espn", 35 "", // break 36 "thumb_bbc", 37 "thumb_nytimes", 38 "thumb_weatherchannel", 39 "thumb_picasa", 40 }; 41 42 String mHtml; 43 InvertedContrastPreview( Context context, AttributeSet attrs, int defStyle)44 public InvertedContrastPreview( 45 Context context, AttributeSet attrs, int defStyle) { 46 super(context, attrs, defStyle); 47 } 48 InvertedContrastPreview(Context context, AttributeSet attrs)49 public InvertedContrastPreview(Context context, AttributeSet attrs) { 50 super(context, attrs); 51 } 52 InvertedContrastPreview(Context context)53 public InvertedContrastPreview(Context context) { 54 super(context); 55 } 56 57 @Override init(Context context)58 protected void init(Context context) { 59 super.init(context); 60 StringBuilder builder = new StringBuilder("<html><body style=\"width: 1000px\">"); 61 for (String thumb : THUMBS) { 62 if (TextUtils.isEmpty(thumb)) { 63 builder.append("<br />"); 64 continue; 65 } 66 builder.append("<img src=\""); 67 builder.append(IMG_ROOT); 68 builder.append(thumb); 69 builder.append("\" /> "); 70 } 71 builder.append("</body></html>"); 72 mHtml = builder.toString(); 73 } 74 75 @Override updatePreview()76 protected void updatePreview() { 77 if (mWebView == null) return; 78 79 WebSettings ws = mWebView.getSettings(); 80 BrowserSettings bs = BrowserSettings.getInstance(); 81 ws.setProperty(WebViewProperties.gfxInvertedScreen, 82 bs.useInvertedRendering() ? "true" : "false"); 83 ws.setProperty(WebViewProperties.gfxInvertedScreenContrast, 84 Float.toString(bs.getInvertedContrast())); 85 mWebView.loadData(mHtml, "text/html", "utf-8"); 86 } 87 88 } 89