Use a grid view for bookmarks page.

The BrowserProvider now stores another blob
for a screenshot of the page.  If the current
page is a bookmark, store a screenshot.  When
viewing bookmarks, show a gridview of screenshots
of the bookmarks.

Requires a change to framework to add THUMBNAIL
to Browser.BookmarkColumns and to the HISTORY_PROJECTION

1 files changed, 243 insertions, 0 deletions

diff --git a/src/com/android/browser/BookmarkGridPage.java b/src/com/android/browser/BookmarkGridPage.java
new file mode 100644
index 000000000..a9db7ac06
--- /dev/null
+++ b/src/com/android/browser/BookmarkGridPage.java
@@ -0,0 +1,243 @@
+/*
+ * Copyright (C) 2009 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.browser;
+
+import android.app.Activity;
+import android.content.Context;
+import android.content.Intent;
+import android.database.Cursor;
+import android.database.ContentObserver;
+import android.database.DataSetObserver;
+import android.graphics.BitmapFactory;
+import android.os.Bundle;
+import android.os.Handler;
+import android.provider.Browser;
+import android.provider.Browser.BookmarkColumns;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.AdapterView;
+import android.widget.GridView;
+import android.widget.ImageView;
+import android.widget.ListAdapter;
+import android.widget.TextView;
+
+import java.util.ArrayList;
+
+public class BookmarkGridPage extends Activity {
+    private final static int SPACING = 10;
+    private BookmarkGrid mGridView;
+    private BookmarkGridAdapter mAdapter;
+
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+        mGridView = new BookmarkGrid(this);
+        mGridView.setNumColumns(3);
+        mAdapter = new BookmarkGridAdapter(this);
+        mGridView.setAdapter(mAdapter);
+        mGridView.setFocusable(true);
+        mGridView.setFocusableInTouchMode(true);
+        mGridView.setSelector(android.R.drawable.gallery_thumb);
+        mGridView.setVerticalSpacing(SPACING);
+        mGridView.setHorizontalSpacing(SPACING);
+        setContentView(mGridView);
+        mGridView.requestFocus();
+    }
+
+    private class BookmarkGrid extends GridView {
+        public BookmarkGrid(Context context) {
+            super(context);
+        }
+        @Override
+        protected void onSizeChanged(int w, int h, int oldw, int oldh) {
+            int thumbHeight = (h - 2 * (SPACING + getListPaddingTop()
+                    + getListPaddingBottom())) / 3;
+            mAdapter.heightChanged(thumbHeight);
+            super.onSizeChanged(w, h, oldw, oldh);
+        }
+    }
+
+    private class BookmarkGridAdapter implements ListAdapter {
+        private ArrayList<DataSetObserver> mDataObservers;
+        private Context mContext;  // Context to use to inflate views
+        private Cursor  mCursor;
+        private int mThumbHeight;
+
+        public BookmarkGridAdapter(Context context) {
+            mContext = context;
+            mDataObservers = new ArrayList<DataSetObserver>();
+            String whereClause = Browser.BookmarkColumns.BOOKMARK + " != 0";
+            String orderBy = Browser.BookmarkColumns.VISITS + " DESC";
+            mCursor = managedQuery(Browser.BOOKMARKS_URI,
+                    Browser.HISTORY_PROJECTION, whereClause, null, orderBy);
+            mCursor.registerContentObserver(new ChangeObserver());
+            mGridView.setOnItemClickListener(
+                    new AdapterView.OnItemClickListener() {
+                public void onItemClick(AdapterView parent, View v,
+                        int position, long id) {
+                    mCursor.moveToPosition(position);
+                    String url = mCursor.getString(
+                            Browser.HISTORY_PROJECTION_URL_INDEX);
+                    Intent intent = (new Intent()).setAction(url);
+                    getParent().setResult(RESULT_OK, intent);
+                    finish();
+                }});
+        }
+
+        void heightChanged(int newHeight) {
+            mThumbHeight = newHeight;
+        }
+
+        private class ChangeObserver extends ContentObserver {
+            public ChangeObserver() {
+                super(new Handler());
+            }
+
+            @Override
+            public boolean deliverSelfNotifications() {
+                return true;
+            }
+
+            @Override
+            public void onChange(boolean selfChange) {
+                BookmarkGridAdapter.this.refreshData();
+            }
+        }
+
+        void refreshData() {
+            mCursor.requery();
+            for (DataSetObserver o : mDataObservers) {
+                o.onChanged();
+            }
+        }
+
+        /* (non-Javadoc)
+         * @see android.widget.ListAdapter#areAllItemsSelectable()
+         */
+        public boolean areAllItemsEnabled() {
+            return true;
+        }
+
+        /* (non-Javadoc)
+         * @see android.widget.ListAdapter#isSelectable(int)
+         */
+        public boolean isEnabled(int position) {
+            if (position >= 0 && position < mCursor.getCount()) {
+                return true;
+            }
+            return false;
+        }
+
+        /* (non-Javadoc)
+         * @see android.widget.Adapter#getCount()
+         */
+        public int getCount() {
+            return mCursor.getCount();
+        }
+
+        /* (non-Javadoc)
+         * @see android.widget.Adapter#getItem(int)
+         */
+        public Object getItem(int position) {
+            return null;
+        }
+
+        /* (non-Javadoc)
+         * @see android.widget.Adapter#getItemId(int)
+         */
+        public long getItemId(int position) {
+            return position;
+        }
+
+        /* (non-Javadoc)
+         * @see android.widget.Adapter#getView(int, android.view.View, android.view.ViewGroup)
+         */
+        public View getView(int position, View convertView, ViewGroup parent) {
+            View v = null;
+            if (convertView != null) {
+                v = convertView;
+            } else {
+                LayoutInflater factory = LayoutInflater.from(mContext);
+                v = factory.inflate(R.layout.bookmark_thumbnail, null);
+            }
+            ImageView thumb = (ImageView) v.findViewById(R.id.thumb);
+            TextView tv = (TextView) v.findViewById(R.id.label);
+
+            mCursor.moveToPosition(position);
+            tv.setText(mCursor.getString(
+                    Browser.HISTORY_PROJECTION_TITLE_INDEX));
+            byte[] data = mCursor.getBlob(
+                    Browser.HISTORY_PROJECTION_THUMBNAIL_INDEX);
+            if (data == null) {
+                // Backup is to show the favicon
+                data = mCursor.getBlob(
+                        Browser.HISTORY_PROJECTION_FAVICON_INDEX);
+                thumb.setScaleType(ImageView.ScaleType.CENTER);
+            } else {
+                thumb.setScaleType(ImageView.ScaleType.FIT_XY);
+            }
+            if (data != null) {
+                thumb.setImageBitmap(
+                        BitmapFactory.decodeByteArray(data, 0, data.length));
+            } else {
+                thumb.setImageResource(R.drawable.app_web_browser_sm);
+                thumb.setScaleType(ImageView.ScaleType.CENTER);
+            }
+            ViewGroup.LayoutParams lp = thumb.getLayoutParams();
+            if (lp.height != mThumbHeight) {
+                lp.height = mThumbHeight;
+                thumb.requestLayout();
+            }
+            return v;
+        }
+
+        /* (non-Javadoc)
+         * @see android.widget.Adapter#registerDataSetObserver(android.database.DataSetObserver)
+         */
+        public void registerDataSetObserver(DataSetObserver observer) {
+            mDataObservers.add(observer);
+        }
+
+        /* (non-Javadoc)
+         * @see android.widget.Adapter#hasStableIds()
+         */
+        public boolean hasStableIds() {
+            return true;
+        }
+
+        /* (non-Javadoc)
+         * @see android.widget.Adapter#unregisterDataSetObserver(android.database.DataSetObserver)
+         */
+        public void unregisterDataSetObserver(DataSetObserver observer) {
+            mDataObservers.remove(observer);
+        }
+
+        public int getItemViewType(int position) {
+            return 0;
+        }
+
+        public int getViewTypeCount() {
+            return 1;
+        }
+
+        public boolean isEmpty() {
+            return getCount() == 0;
+        }
+    }
+}