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/* 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.SnackbarBuilder;
import org.mozilla.gecko.icons.IconCallback;
import org.mozilla.gecko.icons.IconDescriptor;
import org.mozilla.gecko.icons.IconResponse;
import org.mozilla.gecko.icons.Icons;
import org.mozilla.gecko.widget.FaviconView;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.drawable.BitmapDrawable;
import android.support.design.widget.Snackbar;
import android.text.SpannableString;
import android.util.Log;
import android.view.View;
/**
* 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 final Object bitmapLock = new Object();
private FaviconView mFaviconView;
// Search engine identifier specified by the gecko search service. This will be "other"
// for engines that are not shipped with the app.
private String mIdentifier;
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);
// We synchronise to avoid a race condition between this and the favicon loading callback in
// setSearchEngineFromJSON.
synchronized (bitmapLock) {
// Set the icon in the FaviconView.
mFaviconView = ((FaviconView) view.findViewById(R.id.search_engine_icon));
if (mIconBitmap != null) {
mFaviconView.updateAndScaleImage(IconResponse.create(mIconBitmap));
}
}
}
@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) {
Activity activity = (Activity) getContext();
SnackbarBuilder.builder(activity)
.message(R.string.pref_search_last_toast)
.duration(Snackbar.LENGTH_LONG)
.buildAndShow();
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;
}
}
/**
* @return Identifier of built-in search engine, or "other" if engine is not built-in.
*/
public String getIdentifier() {
return mIdentifier;
}
/**
* 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 {
mIdentifier = geckoEngineJSON.getString("identifier");
// A null JS value gets converted into a string.
if (mIdentifier.equals("null")) {
mIdentifier = "other";
}
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 {
Icons.with(getContext())
.pageUrl(mIdentifier)
.icon(IconDescriptor.createGenericIcon(iconURI))
.privileged(true)
.build()
.execute(new IconCallback() {
@Override
public void onIconResponse(IconResponse response) {
mIconBitmap = response.getBitmap();
if (mFaviconView != null) {
mFaviconView.updateAndScaleImage(response);
}
}
});
} 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);
}
}
}
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