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.app.ActivityManager;
20import android.app.AlertDialog;
21import android.content.ContentUris;
22import android.content.Context;
23import android.content.DialogInterface;
24import android.content.Intent;
25import android.content.res.Resources;
26import android.graphics.Bitmap;
27import android.graphics.Canvas;
28import android.graphics.Color;
29import android.graphics.Paint;
30import android.graphics.Path;
31import android.graphics.PorterDuff;
32import android.graphics.PorterDuffXfermode;
33import android.graphics.Rect;
34import android.graphics.RectF;
35import android.graphics.drawable.BitmapDrawable;
36import android.graphics.drawable.Drawable;
37import android.graphics.drawable.PaintDrawable;
38import android.net.Uri;
39import android.os.Message;
40import android.provider.Browser;
41import android.provider.BrowserContract;
42
43public class BookmarkUtils {
44    private final static String LOGTAG = "BookmarkUtils";
45
46    // XXX: There is no public string defining this intent so if Home changes the value, we
47    // have to update this string.
48    private static final String INSTALL_SHORTCUT = "com.android.launcher.action.INSTALL_SHORTCUT";
49
50    enum BookmarkIconType {
51        ICON_INSTALLABLE_WEB_APP, // Icon for an installable web app (launches WebAppRuntime).
52        ICON_HOME_SHORTCUT,        // Icon for a shortcut on the home screen (launches Browser).
53        ICON_WIDGET,
54    }
55
56    /**
57     * Creates an icon to be associated with this bookmark. If available, the apple touch icon
58     * will be used, else we draw our own depending on the type of "bookmark" being created.
59     */
60    static Bitmap createIcon(Context context, Bitmap touchIcon, Bitmap favicon,
61            BookmarkIconType type) {
62        final ActivityManager am = (ActivityManager) context
63                .getSystemService(Context.ACTIVITY_SERVICE);
64        final int iconDimension = am.getLauncherLargeIconSize();
65        final int iconDensity = am.getLauncherLargeIconDensity();
66        return createIcon(context, touchIcon, favicon, type, iconDimension, iconDensity);
67    }
68
69    static Drawable createListFaviconBackground(Context context) {
70        PaintDrawable faviconBackground = new PaintDrawable();
71        Resources res = context.getResources();
72        int padding = res.getDimensionPixelSize(R.dimen.list_favicon_padding);
73        faviconBackground.setPadding(padding, padding, padding, padding);
74        faviconBackground.getPaint().setColor(context.getResources()
75                .getColor(R.color.bookmarkListFaviconBackground));
76        faviconBackground.setCornerRadius(
77                res.getDimension(R.dimen.list_favicon_corner_radius));
78        return faviconBackground;
79    }
80
81    private static Bitmap createIcon(Context context, Bitmap touchIcon,
82            Bitmap favicon, BookmarkIconType type, int iconDimension, int iconDensity) {
83        Bitmap bm = Bitmap.createBitmap(iconDimension, iconDimension, Bitmap.Config.ARGB_8888);
84        Canvas canvas = new Canvas(bm);
85        Rect iconBounds = new Rect(0, 0, bm.getWidth(), bm.getHeight());
86
87        // Use the apple-touch-icon if available
88        if (touchIcon != null) {
89            drawTouchIconToCanvas(touchIcon, canvas, iconBounds);
90        } else {
91            // No touch icon so create our own.
92            // Set the background based on the type of shortcut (either webapp or home shortcut).
93            Bitmap icon = getIconBackground(context, type, iconDensity);
94
95            if (icon != null) {
96                // Now draw the correct icon background into our new bitmap.
97                Paint p = new Paint(Paint.ANTI_ALIAS_FLAG | Paint.FILTER_BITMAP_FLAG);
98                canvas.drawBitmap(icon, null, iconBounds, p);
99            }
100
101            // If we have a favicon, overlay it in a nice rounded white box on top of the
102            // background.
103            if (favicon != null) {
104                drawFaviconToCanvas(context, favicon, canvas, iconBounds, type);
105            }
106        }
107        canvas.setBitmap(null);
108        return bm;
109    }
110
111    /**
112     * Convenience method for creating an intent that will add a shortcut to the home screen.
113     */
114    static Intent createAddToHomeIntent(Context context, String url, String title,
115            Bitmap touchIcon, Bitmap favicon) {
116        Intent i = new Intent(INSTALL_SHORTCUT);
117        Intent shortcutIntent = createShortcutIntent(url);
118        i.putExtra(Intent.EXTRA_SHORTCUT_INTENT, shortcutIntent);
119        i.putExtra(Intent.EXTRA_SHORTCUT_NAME, title);
120        i.putExtra(Intent.EXTRA_SHORTCUT_ICON, createIcon(context, touchIcon, favicon,
121                BookmarkIconType.ICON_HOME_SHORTCUT));
122
123        // Do not allow duplicate items
124        i.putExtra("duplicate", false);
125        return i;
126    }
127
128    static Intent createShortcutIntent(String url) {
129        Intent shortcutIntent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
130        long urlHash = url.hashCode();
131        long uniqueId = (urlHash << 32) | shortcutIntent.hashCode();
132        shortcutIntent.putExtra(Browser.EXTRA_APPLICATION_ID, Long.toString(uniqueId));
133        return shortcutIntent;
134    }
135
136    private static Bitmap getIconBackground(Context context, BookmarkIconType type, int density) {
137        if (type == BookmarkIconType.ICON_HOME_SHORTCUT) {
138            // Want to create a shortcut icon on the homescreen, so the icon
139            // background is the red bookmark.
140            Drawable drawable = context.getResources().getDrawableForDensity(
141                    R.mipmap.ic_launcher_shortcut_browser_bookmark, density);
142            if (drawable instanceof BitmapDrawable) {
143                BitmapDrawable bd = (BitmapDrawable) drawable;
144                return bd.getBitmap();
145            }
146        } else if (type == BookmarkIconType.ICON_INSTALLABLE_WEB_APP) {
147            // Use the web browser icon as the background for the icon for an installable
148            // web app.
149            Drawable drawable = context.getResources().getDrawableForDensity(
150                    R.mipmap.ic_launcher_browser, density);
151            if (drawable instanceof BitmapDrawable) {
152                BitmapDrawable bd = (BitmapDrawable) drawable;
153                return bd.getBitmap();
154            }
155        }
156        return null;
157    }
158
159    private static void drawTouchIconToCanvas(Bitmap touchIcon, Canvas canvas, Rect iconBounds) {
160        Rect src = new Rect(0, 0, touchIcon.getWidth(), touchIcon.getHeight());
161
162        // Paint used for scaling the bitmap and drawing the rounded rect.
163        Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG);
164        paint.setFilterBitmap(true);
165        canvas.drawBitmap(touchIcon, src, iconBounds, paint);
166
167        // Construct a path from a round rect. This will allow drawing with
168        // an inverse fill so we can punch a hole using the round rect.
169        Path path = new Path();
170        path.setFillType(Path.FillType.INVERSE_WINDING);
171        RectF rect = new RectF(iconBounds);
172        rect.inset(1, 1);
173        path.addRoundRect(rect, 8f, 8f, Path.Direction.CW);
174
175        // Reuse the paint and clear the outside of the rectangle.
176        paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.CLEAR));
177        canvas.drawPath(path, paint);
178    }
179
180    private static void drawFaviconToCanvas(Context context, Bitmap favicon,
181            Canvas canvas, Rect iconBounds, BookmarkIconType type) {
182        // Make a Paint for the white background rectangle and for
183        // filtering the favicon.
184        Paint p = new Paint(Paint.ANTI_ALIAS_FLAG | Paint.FILTER_BITMAP_FLAG);
185        p.setStyle(Paint.Style.FILL_AND_STROKE);
186        if (type == BookmarkIconType.ICON_WIDGET) {
187            p.setColor(context.getResources()
188                    .getColor(R.color.bookmarkWidgetFaviconBackground));
189        } else {
190            p.setColor(Color.WHITE);
191        }
192
193        // Create a rectangle that is slightly wider than the favicon
194        int faviconDimension = context.getResources().getDimensionPixelSize(R.dimen.favicon_size);
195        int faviconPaddedRectDimension;
196        if (type == BookmarkIconType.ICON_WIDGET) {
197            faviconPaddedRectDimension = canvas.getWidth();
198        } else {
199            faviconPaddedRectDimension = context.getResources().getDimensionPixelSize(
200                    R.dimen.favicon_padded_size);
201        }
202        float padding = (faviconPaddedRectDimension - faviconDimension) / 2;
203        final float x = iconBounds.exactCenterX() - (faviconPaddedRectDimension / 2);
204        float y = iconBounds.exactCenterY() - (faviconPaddedRectDimension / 2);
205        if (type != BookmarkIconType.ICON_WIDGET) {
206            // Note: Subtract from the y position since the box is
207            // slightly higher than center. Use padding since it is already
208            // device independent.
209            y -= padding;
210        }
211        RectF r = new RectF(x, y, x + faviconPaddedRectDimension, y + faviconPaddedRectDimension);
212        // Draw a white rounded rectangle behind the favicon
213        canvas.drawRoundRect(r, 3, 3, p);
214
215        // Draw the favicon in the same rectangle as the rounded
216        // rectangle but inset by the padding
217        // (results in a 16x16 favicon).
218        r.inset(padding, padding);
219        canvas.drawBitmap(favicon, null, r, null);
220    }
221
222    /* package */ static Uri getBookmarksUri(Context context) {
223        return BrowserContract.Bookmarks.CONTENT_URI;
224    }
225
226    /**
227     * Show a confirmation dialog to remove a bookmark.
228     * @param id Id of the bookmark to remove
229     * @param title Title of the bookmark, to be displayed in the confirmation method.
230     * @param context Package Context for strings, dialog, ContentResolver
231     * @param msg Message to send if the bookmark is deleted.
232     */
233    static void displayRemoveBookmarkDialog( final long id, final String title,
234            final Context context, final Message msg) {
235
236        new AlertDialog.Builder(context)
237                .setIconAttribute(android.R.attr.alertDialogIcon)
238                .setMessage(context.getString(R.string.delete_bookmark_warning,
239                        title))
240                .setPositiveButton(R.string.ok,
241                        new DialogInterface.OnClickListener() {
242                            @Override
243                            public void onClick(DialogInterface dialog, int whichButton) {
244                                if (msg != null) {
245                                    msg.sendToTarget();
246                                }
247                                Runnable runnable = new Runnable(){
248                                    @Override
249                                    public void run() {
250                                        Uri uri = ContentUris.withAppendedId(
251                                                BrowserContract.Bookmarks.CONTENT_URI,
252                                                id);
253                                        context.getContentResolver().delete(uri, null, null);
254                                    }
255                                };
256                                new Thread(runnable).start();
257                            }
258                        })
259                .setNegativeButton(R.string.cancel, null)
260                .show();
261    }
262}
263