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
17package com.android.browser.preferences;
18
19import android.content.Context;
20import android.text.TextUtils;
21import android.util.AttributeSet;
22import android.webkit.WebSettingsClassic;
23import android.webkit.WebViewClassic;
24
25import com.android.browser.BrowserSettings;
26import com.android.browser.BrowserWebView;
27import com.android.browser.WebViewProperties;
28
29public class InvertedContrastPreview extends WebViewPreview {
30
31    static final String IMG_ROOT = "content://com.android.browser.home/res/raw/";
32    static final String[] THUMBS = new String[] {
33        "thumb_google",
34        "thumb_amazon",
35        "thumb_cnn",
36        "thumb_espn",
37        "", // break
38        "thumb_bbc",
39        "thumb_nytimes",
40        "thumb_weatherchannel",
41        "thumb_picasa",
42    };
43
44    String mHtml;
45
46    public InvertedContrastPreview(
47            Context context, AttributeSet attrs, int defStyle) {
48        super(context, attrs, defStyle);
49    }
50
51    public InvertedContrastPreview(Context context, AttributeSet attrs) {
52        super(context, attrs);
53    }
54
55    public InvertedContrastPreview(Context context) {
56        super(context);
57    }
58
59    @Override
60    protected void init(Context context) {
61        super.init(context);
62        StringBuilder builder = new StringBuilder("<html><body style=\"width: 1000px\">");
63        for (String thumb : THUMBS) {
64            if (TextUtils.isEmpty(thumb)) {
65                builder.append("<br />");
66                continue;
67            }
68            builder.append("<img src=\"");
69            builder.append(IMG_ROOT);
70            builder.append(thumb);
71            builder.append("\" />&nbsp;");
72        }
73        builder.append("</body></html>");
74        mHtml = builder.toString();
75    }
76
77    @Override
78    protected void updatePreview(boolean forceReload) {
79        if (mWebView == null || !BrowserWebView.isClassic()) return;
80
81        WebSettingsClassic ws = WebViewClassic.fromWebView(mWebView).getSettings();
82        BrowserSettings bs = BrowserSettings.getInstance();
83        ws.setProperty(WebViewProperties.gfxInvertedScreen,
84                bs.useInvertedRendering() ? "true" : "false");
85        ws.setProperty(WebViewProperties.gfxInvertedScreenContrast,
86                Float.toString(bs.getInvertedContrast()));
87        if (forceReload) {
88            mWebView.loadData(mHtml, "text/html", null);
89        }
90    }
91
92}
93