michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: package org.mozilla.gecko.preferences;
michael@0: 
michael@0: import org.json.JSONException;
michael@0: import org.json.JSONObject;
michael@0: import org.mozilla.gecko.R;
michael@0: import org.mozilla.gecko.favicons.Favicons;
michael@0: import org.mozilla.gecko.favicons.decoders.FaviconDecoder;
michael@0: import org.mozilla.gecko.util.ThreadUtils;
michael@0: import org.mozilla.gecko.widget.FaviconView;
michael@0: 
michael@0: import android.app.AlertDialog;
michael@0: import android.content.Context;
michael@0: import android.graphics.Bitmap;
michael@0: import android.graphics.drawable.BitmapDrawable;
michael@0: import android.text.SpannableString;
michael@0: import android.util.Log;
michael@0: import android.view.View;
michael@0: import android.widget.Toast;
michael@0: 
michael@0: /**
michael@0:  * Represents an element in the list of search engines on the preferences menu.
michael@0:  */
michael@0: public class SearchEnginePreference extends CustomListPreference {
michael@0:     protected String LOGTAG = "SearchEnginePreference";
michael@0: 
michael@0:     protected static final int INDEX_REMOVE_BUTTON = 1;
michael@0: 
michael@0:     // The icon to display in the prompt when clicked.
michael@0:     private BitmapDrawable mPromptIcon;
michael@0: 
michael@0:     // The bitmap backing the drawable above - needed separately for the FaviconView.
michael@0:     private Bitmap mIconBitmap;
michael@0: 
michael@0:     private FaviconView mFaviconView;
michael@0: 
michael@0:     public SearchEnginePreference(Context context, SearchPreferenceCategory parentCategory) {
michael@0:         super(context, parentCategory);
michael@0:     }
michael@0: 
michael@0:     /**
michael@0:      * Called by Android when we're bound to the custom view. Allows us to set the custom properties
michael@0:      * of our custom view elements as we desire (We can now use findViewById on them).
michael@0:      *
michael@0:      * @param view The view instance for this Preference object.
michael@0:      */
michael@0:     @Override
michael@0:     protected void onBindView(View view) {
michael@0:         super.onBindView(view);
michael@0: 
michael@0:         // Set the icon in the FaviconView.
michael@0:         mFaviconView = ((FaviconView) view.findViewById(R.id.search_engine_icon));
michael@0:         mFaviconView.updateAndScaleImage(mIconBitmap, getTitle().toString());
michael@0:     }
michael@0: 
michael@0:     @Override
michael@0:     protected int getPreferenceLayoutResource() {
michael@0:         return R.layout.preference_search_engine;
michael@0:     }
michael@0: 
michael@0:     /**
michael@0:      * Returns the strings to be displayed in the dialog.
michael@0:      */
michael@0:     @Override
michael@0:     protected String[] createDialogItems() {
michael@0:         return new String[] { LABEL_SET_AS_DEFAULT,
michael@0:                               LABEL_REMOVE };
michael@0:     }
michael@0: 
michael@0:     @Override
michael@0:     public void showDialog() {
michael@0:         // If this is the last engine, then we are the default, and none of the options
michael@0:         // on this menu can do anything.
michael@0:         if (mParentCategory.getPreferenceCount() == 1) {
michael@0:             ThreadUtils.postToUiThread(new Runnable() {
michael@0:                 @Override
michael@0:                 public void run() {
michael@0:                     Toast.makeText(getContext(), R.string.pref_search_last_toast, Toast.LENGTH_SHORT).show();
michael@0:                 }
michael@0:             });
michael@0:             return;
michael@0:         }
michael@0: 
michael@0:         super.showDialog();
michael@0:     }
michael@0: 
michael@0:     @Override
michael@0:     protected void configureDialogBuilder(AlertDialog.Builder builder) {
michael@0:         // Copy the icon from this object to the prompt we produce. We lazily create the drawable,
michael@0:         // as the user may not ever actually tap this object.
michael@0:         if (mPromptIcon == null && mIconBitmap != null) {
michael@0:             mPromptIcon = new BitmapDrawable(getContext().getResources(), mFaviconView.getBitmap());
michael@0:         }
michael@0: 
michael@0:         builder.setIcon(mPromptIcon);
michael@0:     }
michael@0: 
michael@0:     @Override
michael@0:     protected void onDialogIndexClicked(int index) {
michael@0:         switch (index) {
michael@0:             case INDEX_SET_DEFAULT_BUTTON:
michael@0:                 mParentCategory.setDefault(this);
michael@0:                 break;
michael@0: 
michael@0:             case INDEX_REMOVE_BUTTON:
michael@0:                 mParentCategory.uninstall(this);
michael@0:                 break;
michael@0: 
michael@0:             default:
michael@0:                 Log.w(LOGTAG, "Selected index out of range.");
michael@0:                 break;
michael@0:         }
michael@0:      }
michael@0: 
michael@0:     /**
michael@0:      * Configure this Preference object from the Gecko search engine JSON object.
michael@0:      * @param geckoEngineJSON The Gecko-formatted JSON object representing the search engine.
michael@0:      * @throws JSONException If the JSONObject is invalid.
michael@0:      */
michael@0:     public void setSearchEngineFromJSON(JSONObject geckoEngineJSON) throws JSONException {
michael@0:         final String engineName = geckoEngineJSON.getString("name");
michael@0:         final SpannableString titleSpannable = new SpannableString(engineName);
michael@0: 
michael@0:         setTitle(titleSpannable);
michael@0: 
michael@0:         final String iconURI = geckoEngineJSON.getString("iconURI");
michael@0:         // Keep a reference to the bitmap - we'll need it later in onBindView.
michael@0:         try {
michael@0:             final int desiredWidth;
michael@0:             if (mFaviconView != null) {
michael@0:                 desiredWidth = mFaviconView.getWidth();
michael@0:             } else {
michael@0:                 // largestFaviconSize is initialized when Favicons is attached to a
michael@0:                 // context, which occurs during GeckoApp.onCreate. That might not
michael@0:                 // ever happen (leaving it at 0), so we fall back.
michael@0:                 if (Favicons.largestFaviconSize == 0) {
michael@0:                     desiredWidth = 128;
michael@0:                 } else {
michael@0:                     desiredWidth = Favicons.largestFaviconSize;
michael@0:                 }
michael@0:             }
michael@0: 
michael@0:             // TODO: use the cache. Bug 961600.
michael@0:             mIconBitmap = FaviconDecoder.getMostSuitableBitmapFromDataURI(iconURI, desiredWidth);
michael@0: 
michael@0:         } catch (IllegalArgumentException e) {
michael@0:             Log.e(LOGTAG, "IllegalArgumentException creating Bitmap. Most likely a zero-length bitmap.", e);
michael@0:         } catch (NullPointerException e) {
michael@0:             Log.e(LOGTAG, "NullPointerException creating Bitmap. Most likely a zero-length bitmap.", e);
michael@0:         }
michael@0:     }
michael@0: }