The Tor Browser / file revision

 /* This Source Code Form is subject to the terms of the Mozilla Public

  * License, v. 2.0. If a copy of the MPL was not distributed with this

  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

 package org.mozilla.gecko.preferences;

 import org.json.JSONException;

 import org.json.JSONObject;

 import org.mozilla.gecko.R;

 import org.mozilla.gecko.favicons.Favicons;

 import org.mozilla.gecko.favicons.decoders.FaviconDecoder;

 import org.mozilla.gecko.util.ThreadUtils;

 import org.mozilla.gecko.widget.FaviconView;

 import android.app.AlertDialog;

 import android.content.Context;

 import android.graphics.Bitmap;

 import android.graphics.drawable.BitmapDrawable;

 import android.text.SpannableString;

 import android.util.Log;

 import android.view.View;

 import android.widget.Toast;

 /**

  * Represents an element in the list of search engines on the preferences menu.

  */

 public class SearchEnginePreference extends CustomListPreference {

     protected String LOGTAG = "SearchEnginePreference";

     protected static final int INDEX_REMOVE_BUTTON = 1;

     // The icon to display in the prompt when clicked.

     private BitmapDrawable mPromptIcon;

     // The bitmap backing the drawable above - needed separately for the FaviconView.

     private Bitmap mIconBitmap;

     private FaviconView mFaviconView;

     public SearchEnginePreference(Context context, SearchPreferenceCategory parentCategory) {

         super(context, parentCategory);

     }

     /**

      * Called by Android when we're bound to the custom view. Allows us to set the custom properties

      * of our custom view elements as we desire (We can now use findViewById on them).

      *

      * @param view The view instance for this Preference object.

      */

     @Override

     protected void onBindView(View view) {

         super.onBindView(view);

         // Set the icon in the FaviconView.

         mFaviconView = ((FaviconView) view.findViewById(R.id.search_engine_icon));

         mFaviconView.updateAndScaleImage(mIconBitmap, getTitle().toString());

     }

     @Override

     protected int getPreferenceLayoutResource() {

         return R.layout.preference_search_engine;

     }

     /**

      * Returns the strings to be displayed in the dialog.

      */

     @Override

     protected String[] createDialogItems() {

         return new String[] { LABEL_SET_AS_DEFAULT,

                               LABEL_REMOVE };

     }

     @Override

     public void showDialog() {

         // If this is the last engine, then we are the default, and none of the options

         // on this menu can do anything.

         if (mParentCategory.getPreferenceCount() == 1) {

             ThreadUtils.postToUiThread(new Runnable() {

                 @Override

                 public void run() {

                     Toast.makeText(getContext(), R.string.pref_search_last_toast, Toast.LENGTH_SHORT).show();

                 }

             });

             return;

         }

         super.showDialog();

     }

     @Override

     protected void configureDialogBuilder(AlertDialog.Builder builder) {

         // Copy the icon from this object to the prompt we produce. We lazily create the drawable,

         // as the user may not ever actually tap this object.

         if (mPromptIcon == null && mIconBitmap != null) {

             mPromptIcon = new BitmapDrawable(getContext().getResources(), mFaviconView.getBitmap());

         }

         builder.setIcon(mPromptIcon);

     }

     @Override

     protected void onDialogIndexClicked(int index) {

         switch (index) {

             case INDEX_SET_DEFAULT_BUTTON:

                 mParentCategory.setDefault(this);

                 break;

             case INDEX_REMOVE_BUTTON:

                 mParentCategory.uninstall(this);

                 break;

             default:

                 Log.w(LOGTAG, "Selected index out of range.");

                 break;

         }

      }

     /**

      * Configure this Preference object from the Gecko search engine JSON object.

      * @param geckoEngineJSON The Gecko-formatted JSON object representing the search engine.

      * @throws JSONException If the JSONObject is invalid.

      */

     public void setSearchEngineFromJSON(JSONObject geckoEngineJSON) throws JSONException {

         final String engineName = geckoEngineJSON.getString("name");

         final SpannableString titleSpannable = new SpannableString(engineName);

         setTitle(titleSpannable);

         final String iconURI = geckoEngineJSON.getString("iconURI");

         // Keep a reference to the bitmap - we'll need it later in onBindView.

         try {

             final int desiredWidth;

             if (mFaviconView != null) {

                 desiredWidth = mFaviconView.getWidth();

             } else {

                 // largestFaviconSize is initialized when Favicons is attached to a

                 // context, which occurs during GeckoApp.onCreate. That might not

                 // ever happen (leaving it at 0), so we fall back.

                 if (Favicons.largestFaviconSize == 0) {

                     desiredWidth = 128;

                 } else {

                     desiredWidth = Favicons.largestFaviconSize;

                 }

             }

             // TODO: use the cache. Bug 961600.

             mIconBitmap = FaviconDecoder.getMostSuitableBitmapFromDataURI(iconURI, desiredWidth);

         } catch (IllegalArgumentException e) {

             Log.e(LOGTAG, "IllegalArgumentException creating Bitmap. Most likely a zero-length bitmap.", e);

         } catch (NullPointerException e) {

             Log.e(LOGTAG, "NullPointerException creating Bitmap. Most likely a zero-length bitmap.", e);

         }

     }

 }