src/com/android/browser/BrowserBookmarksAdapter.java

/*
 * Copyright (C) 2006 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.content.Context;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.graphics.drawable.BitmapDrawable;
import android.provider.BrowserContract.Bookmarks;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.ImageView.ScaleType;
import android.widget.TextView;

import com.android.browser.util.ThreadedCursorAdapter;
import com.android.browser.view.BookmarkContainer;

public class BrowserBookmarksAdapter extends
        ThreadedCursorAdapter<BrowserBookmarksAdapterItem> {

    LayoutInflater mInflater;
    int mCurrentView;
    Context mContext;

    /**
     *  Create a new BrowserBookmarksAdapter.
     */
    public BrowserBookmarksAdapter(Context context, int defaultView) {
        // Make sure to tell the CursorAdapter to avoid the observer and auto-requery
        // since the Loader will do that for us.
        super(context, null);
        mInflater = LayoutInflater.from(context);
        mContext = context;
        selectView(defaultView);
    }

    @Override
    public View newView(Context context, ViewGroup parent) {
        if (mCurrentView == BrowserBookmarksPage.VIEW_LIST) {
            return mInflater.inflate(R.layout.bookmark_list, parent, false);
        } else {
            return mInflater.inflate(R.layout.bookmark_thumbnail, parent, false);
        }
    }

    @Override
    public void bindView(View view, BrowserBookmarksAdapterItem object) {
        BookmarkContainer container = (BookmarkContainer) view;
        container.setIgnoreRequestLayout(true);
        if (mCurrentView == BrowserBookmarksPage.VIEW_LIST) {
            bindListView(view, mContext, object);
        } else {
            bindGridView(view, mContext, object);
        }
        container.setIgnoreRequestLayout(false);
    }

    void clearView(View view) {
        if (mCurrentView == BrowserBookmarksPage.VIEW_LIST) {
            ImageView favicon = (ImageView) view.findViewById(R.id.favicon);
            favicon.setImageBitmap(null);
        } else {
            ImageView thumb = (ImageView) view.findViewById(R.id.thumb);
            thumb.setImageBitmap(null);
        }
    }

    CharSequence getTitle(Cursor cursor) {
        int type = cursor.getInt(BookmarksLoader.COLUMN_INDEX_TYPE);
        switch (type) {
        case Bookmarks.BOOKMARK_TYPE_OTHER_FOLDER:
            return mContext.getText(R.string.other_bookmarks);
        }
        return cursor.getString(BookmarksLoader.COLUMN_INDEX_TITLE);
    }

    void bindGridView(View view, Context context, BrowserBookmarksAdapterItem item) {
        // We need to set this to handle rotation and other configuration change
        // events. If the padding didn't change, this is a no op.
        int padding = context.getResources()
                .getDimensionPixelSize(R.dimen.combo_horizontalSpacing);
        view.setPadding(padding, view.getPaddingTop(),
                padding, view.getPaddingBottom());
        ImageView thumb = (ImageView) view.findViewById(R.id.thumb);
        TextView tv = (TextView) view.findViewById(R.id.label);

        tv.setText(item.title);
        if (item.is_folder) {
            // folder
            thumb.setImageResource(R.drawable.thumb_bookmark_widget_folder_holo);
            thumb.setScaleType(ScaleType.FIT_END);
            thumb.setBackground(null);
        } else {
            thumb.setScaleType(ScaleType.CENTER_CROP);
            if (item.thumbnail == null) {
                thumb.setImageResource(R.drawable.browser_thumbnail);
            } else {
                thumb.setImageDrawable(item.thumbnail);
            }
            thumb.setBackgroundResource(R.drawable.border_thumb_bookmarks_widget_holo);
        }
    }

    void bindListView(View view, Context context, BrowserBookmarksAdapterItem item) {
        ImageView favicon = (ImageView) view.findViewById(R.id.favicon);
        TextView tv = (TextView) view.findViewById(R.id.label);

        tv.setText(item.title);
        if (item.is_folder) {
            // folder
            favicon.setImageResource(R.drawable.ic_folder_holo_dark);
            favicon.setBackground(null);
        } else {
            if (item.favicon == null) {
                favicon.setImageResource(R.drawable.app_web_browser_sm);
            } else {
                favicon.setImageDrawable(item.favicon);
            }
            favicon.setBackgroundResource(R.drawable.bookmark_list_favicon_bg);
        }
    }

    public void selectView(int view) {
        if (view != BrowserBookmarksPage.VIEW_LIST
                && view != BrowserBookmarksPage.VIEW_THUMBNAILS) {
            throw new IllegalArgumentException("Unknown view specified: " + view);
        }
        mCurrentView = view;
    }

    public int getViewMode() {
        return mCurrentView;
    }

    @Override
    public BrowserBookmarksAdapterItem getRowObject(Cursor c,
            BrowserBookmarksAdapterItem item) {
        if (item == null) {
            item = new BrowserBookmarksAdapterItem();
        }
        Bitmap favicon = item.favicon != null ? item.favicon.getBitmap() : null;
        Bitmap thumbnail = item.thumbnail != null ? item.thumbnail.getBitmap() : null;
        favicon = BrowserBookmarksPage.getBitmap(c,
                BookmarksLoader.COLUMN_INDEX_FAVICON, favicon);
        thumbnail = BrowserBookmarksPage.getBitmap(c,
                BookmarksLoader.COLUMN_INDEX_THUMBNAIL, thumbnail);
        if (favicon != null
                && (item.favicon == null || item.favicon.getBitmap() != favicon)) {
            item.favicon = new BitmapDrawable(mContext.getResources(), favicon);
        }
        if (thumbnail != null
                && (item.thumbnail == null || item.thumbnail.getBitmap() != thumbnail)) {
            item.thumbnail = new BitmapDrawable(mContext.getResources(), thumbnail);
        }
        item.is_folder = c.getInt(BookmarksLoader.COLUMN_INDEX_IS_FOLDER) != 0;
        item.title = getTitle(c);
        item.url = c.getString(BookmarksLoader.COLUMN_INDEX_URL);
        return item;
    }

    @Override
    public BrowserBookmarksAdapterItem getLoadingObject() {
        BrowserBookmarksAdapterItem item = new BrowserBookmarksAdapterItem();
        return item;
    }
}