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 
17 package com.android.browser;
18 
19 import android.app.ActivityManager;
20 import android.app.AlertDialog;
21 import android.content.ContentUris;
22 import android.content.Context;
23 import android.content.DialogInterface;
24 import android.content.Intent;
25 import android.content.res.Resources;
26 import android.graphics.Bitmap;
27 import android.graphics.Canvas;
28 import android.graphics.Color;
29 import android.graphics.Paint;
30 import android.graphics.Path;
31 import android.graphics.PorterDuff;
32 import android.graphics.PorterDuffXfermode;
33 import android.graphics.Rect;
34 import android.graphics.RectF;
35 import android.graphics.drawable.BitmapDrawable;
36 import android.graphics.drawable.Drawable;
37 import android.graphics.drawable.PaintDrawable;
38 import android.net.Uri;
39 import android.os.Message;
40 import android.provider.Browser;
41 import android.provider.BrowserContract;
42 
43 public 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      */
createIcon(Context context, Bitmap touchIcon, Bitmap favicon, BookmarkIconType type)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 
createListFaviconBackground(Context context)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 
createIcon(Context context, Bitmap touchIcon, Bitmap favicon, BookmarkIconType type, int iconDimension, int iconDensity)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      */
createAddToHomeIntent(Context context, String url, String title, Bitmap touchIcon, Bitmap favicon)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 
createShortcutIntent(String url)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 
getIconBackground(Context context, BookmarkIconType type, int density)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 
drawTouchIconToCanvas(Bitmap touchIcon, Canvas canvas, Rect iconBounds)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 
drawFaviconToCanvas(Context context, Bitmap favicon, Canvas canvas, Rect iconBounds, BookmarkIconType type)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 
getBookmarksUri(Context context)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      */
displayRemoveBookmarkDialog( final long id, final String title, final Context context, final Message msg)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