BookmarkUtils.java revision 3dff1cedc22620ab56fbd39f3703f19bb552ca34 
1/*
2 * Copyright (C) 2010 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;
18
19import android.content.Context;
20import android.content.Intent;
21import android.content.SharedPreferences;
22import android.graphics.Bitmap;
23import android.graphics.BitmapFactory;
24import android.graphics.Canvas;
25import android.graphics.Color;
26import android.graphics.Paint;
27import android.graphics.Path;
28import android.graphics.PorterDuff;
29import android.graphics.PorterDuffXfermode;
30import android.graphics.Rect;
31import android.graphics.RectF;
32import android.net.Uri;
33import android.preference.PreferenceManager;
34import android.provider.Browser;
35import android.provider.BrowserContract;
36import android.text.TextUtils;
37
38class BookmarkUtils {
39    private final static String LOGTAG = "BookmarkUtils";
40
41    // XXX: There is no public string defining this intent so if Home changes the value, we
42    // have to update this string.
43    private static final String INSTALL_SHORTCUT = "com.android.launcher.action.INSTALL_SHORTCUT";
44
45    enum BookmarkIconType {
46        ICON_INSTALLABLE_WEB_APP, // Icon for an installable web app (launches WebAppRuntime).
47        ICON_HOME_SHORTCUT        // Icon for a shortcut on the home screen (launches Browser).
48    };
49
50    /**
51     * Creates an icon to be associated with this bookmark. If available, the apple touch icon
52     * will be used, else we draw our own depending on the type of "bookmark" being created.
53     */
54    static Bitmap createIcon(Context context, Bitmap touchIcon, Bitmap favicon,
55            BookmarkIconType type) {
56        int iconDimension = context.getResources().getDimensionPixelSize(
57                android.R.dimen.app_icon_size);
58
59        Bitmap bm = Bitmap.createBitmap(iconDimension, iconDimension, Bitmap.Config.ARGB_8888);
60        Canvas canvas = new Canvas(bm);
61        Rect iconBounds = new Rect(0, 0, bm.getWidth(), bm.getHeight());
62
63        // Use the apple-touch-icon if available
64        if (touchIcon != null) {
65            drawTouchIconToCanvas(touchIcon, canvas, iconBounds);
66        } else {
67            // No touch icon so create our own.
68            // Set the background based on the type of shortcut (either webapp or home shortcut).
69            Bitmap icon = getIconBackground(context, type);
70
71            if (icon != null) {
72                // Now draw the correct icon background into our new bitmap.
73                Paint p = new Paint(Paint.ANTI_ALIAS_FLAG | Paint.FILTER_BITMAP_FLAG);
74                canvas.drawBitmap(icon, null, iconBounds, p);
75            }
76
77            // If we have a favicon, overlay it in a nice rounded white box on top of the
78            // background.
79            if (favicon != null) {
80                drawFaviconToCanvas(context, favicon, canvas, iconBounds);
81            }
82        }
83        return bm;
84    }
85
86    /**
87     * Convenience method for creating an intent that will add a shortcut to the home screen.
88     */
89    static Intent createAddToHomeIntent(Context context, String url, String title,
90            Bitmap touchIcon, Bitmap favicon) {
91        Intent i = new Intent(INSTALL_SHORTCUT);
92        Intent shortcutIntent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
93        long urlHash = url.hashCode();
94        long uniqueId = (urlHash << 32) | shortcutIntent.hashCode();
95        shortcutIntent.putExtra(Browser.EXTRA_APPLICATION_ID, Long.toString(uniqueId));
96        i.putExtra(Intent.EXTRA_SHORTCUT_INTENT, shortcutIntent);
97        i.putExtra(Intent.EXTRA_SHORTCUT_NAME, title);
98        i.putExtra(Intent.EXTRA_SHORTCUT_ICON, createIcon(context, touchIcon, favicon,
99                BookmarkIconType.ICON_HOME_SHORTCUT));
100
101        // Do not allow duplicate items
102        i.putExtra("duplicate", false);
103        return i;
104    }
105
106    private static Bitmap getIconBackground(Context context, BookmarkIconType type) {
107        if (type == BookmarkIconType.ICON_HOME_SHORTCUT) {
108            // Want to create a shortcut icon on the homescreen, so the icon
109            // background is the red bookmark.
110            return BitmapFactory.decodeResource(context.getResources(),
111                    R.mipmap.ic_launcher_shortcut_browser_bookmark);
112        } else if (type == BookmarkIconType.ICON_INSTALLABLE_WEB_APP) {
113            // Use the web browser icon as the background for the icon for an installable
114            // web app.
115            return BitmapFactory.decodeResource(context.getResources(),
116                    R.mipmap.ic_launcher_browser);
117        }
118        return null;
119    }
120
121    private static void drawTouchIconToCanvas(Bitmap touchIcon, Canvas canvas, Rect iconBounds) {
122        Rect src = new Rect(0, 0, touchIcon.getWidth(), touchIcon.getHeight());
123
124        // Paint used for scaling the bitmap and drawing the rounded rect.
125        Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG);
126        paint.setFilterBitmap(true);
127        canvas.drawBitmap(touchIcon, src, iconBounds, paint);
128
129        // Construct a path from a round rect. This will allow drawing with
130        // an inverse fill so we can punch a hole using the round rect.
131        Path path = new Path();
132        path.setFillType(Path.FillType.INVERSE_WINDING);
133        RectF rect = new RectF(iconBounds);
134        rect.inset(1, 1);
135        path.addRoundRect(rect, 8f, 8f, Path.Direction.CW);
136
137        // Reuse the paint and clear the outside of the rectangle.
138        paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.CLEAR));
139        canvas.drawPath(path, paint);
140    }
141
142    private static void drawFaviconToCanvas(Context context, Bitmap favicon, Canvas canvas,
143            Rect iconBounds) {
144        // Make a Paint for the white background rectangle and for
145        // filtering the favicon.
146        Paint p = new Paint(Paint.ANTI_ALIAS_FLAG | Paint.FILTER_BITMAP_FLAG);
147        p.setStyle(Paint.Style.FILL_AND_STROKE);
148        p.setColor(Color.WHITE);
149
150        // Create a rectangle that is slightly wider than the favicon
151        int faviconDimension = context.getResources().getDimensionPixelSize(R.dimen.favicon_size);
152        int faviconPaddedRectDimension = context.getResources().getDimensionPixelSize(
153                R.dimen.favicon_padded_size);
154        float padding = (faviconPaddedRectDimension - faviconDimension) / 2;
155        final float x = iconBounds.exactCenterX() - (faviconPaddedRectDimension / 2);
156        // Note: Subtract from the y position since the box is
157        // slightly higher than center. Use padding since it is already
158        // device independent.
159        final float y = iconBounds.exactCenterY() - (faviconPaddedRectDimension / 2) - padding;
160        RectF r = new RectF(x, y, x + faviconPaddedRectDimension, y + faviconPaddedRectDimension);
161
162        // Draw a white rounded rectangle behind the favicon
163        canvas.drawRoundRect(r, 2, 2, p);
164
165        // Draw the favicon in the same rectangle as the rounded
166        // rectangle but inset by the padding
167        // (results in a 16x16 favicon).
168        r.inset(padding, padding);
169        canvas.drawBitmap(favicon, null, r, null);
170    }
171
172    /* package */ static Uri getBookmarksUri(Context context) {
173        return addAccountInfo(context,
174                BrowserContract.Bookmarks.CONTENT_URI.buildUpon()).build();
175    }
176
177    /* package */ static Uri.Builder addAccountInfo(Context context, Uri.Builder ub) {
178        Uri uri = BrowserContract.Bookmarks.CONTENT_URI;
179        SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
180        String accountType = prefs.getString(BrowserBookmarksPage.PREF_ACCOUNT_TYPE, null);
181        String accountName = prefs.getString(BrowserBookmarksPage.PREF_ACCOUNT_NAME, null);
182        if (!TextUtils.isEmpty(accountName) && !TextUtils.isEmpty(accountType)) {
183            ub.appendQueryParameter(
184                    BrowserContract.Bookmarks.PARAM_ACCOUNT_NAME,accountName);
185            ub.appendQueryParameter(
186                    BrowserContract.Bookmarks.PARAM_ACCOUNT_TYPE, accountType);
187        }
188        return ub;
189    }
190}
191