src/com/android/globalsearch/SearchSettings.java - platform/packages/apps/GlobalSearch - Git at Google

 /*
  * 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.globalsearch;

 import android.app.AlertDialog;
 import android.app.Dialog;
 import android.app.SearchManager;
 import android.content.ComponentName;
 import android.content.Context;
 import android.content.DialogInterface;
 import android.content.Intent;
 import android.content.pm.ActivityInfo;
 import android.content.pm.PackageManager;
 import android.content.pm.ResolveInfo;
 import android.content.res.Resources;
 import android.os.Bundle;
 import android.preference.CheckBoxPreference;
 import android.preference.ListPreference;
 import android.preference.Preference;
 import android.preference.PreferenceActivity;
 import android.preference.PreferenceGroup;
 import android.preference.PreferenceScreen;
 import android.preference.Preference.OnPreferenceChangeListener;
 import android.preference.Preference.OnPreferenceClickListener;
 import android.provider.Settings;
 import android.provider.Settings.SettingNotFoundException;
 import android.server.search.SearchableInfo;
 import android.server.search.Searchables;
 import android.util.Log;

 import java.util.ArrayList;
 import java.util.List;

 /**
  * Activity for setting global search preferences. Changes to search preferences trigger a broadcast
  * intent that causes all SuggestionSources objects to be updated.
  */
 public class SearchSettings extends PreferenceActivity
         implements OnPreferenceClickListener, OnPreferenceChangeListener {

     private static final boolean DBG = false;
     private static final String TAG = "SearchSettings";

     // Only used to find the preferences after inflating
     private static final String CLEAR_SHORTCUTS_PREF = "clear_shortcuts";
     private static final String SEARCH_ENGINE_SETTINGS_PREF = "search_engine_settings";
     private static final String SEARCH_SOURCES_PREF = "search_sources";

     private SearchManager mSearchManager;

     // These instances are not shared with SuggestionProvider
     private SuggestionSources mSources;
     private ShortcutRepository mShortcuts;

     // References to the top-level preference objects
     private Preference mClearShortcutsPreference;
     private PreferenceScreen mSearchEngineSettingsPreference;
     private PreferenceGroup mSourcePreferences;

     // Dialog ids
     private static final int CLEAR_SHORTCUTS_CONFIRM_DIALOG = 0;

     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);

         mSearchManager = (SearchManager) getSystemService(Context.SEARCH_SERVICE);

         mSources = new SuggestionSources(this);
         mSources.load();
         mShortcuts = ShortcutRepositoryImplLog.create(this);
         getPreferenceManager().setSharedPreferencesName(SuggestionSources.PREFERENCES_NAME);

         addPreferencesFromResource(R.xml.preferences);

         PreferenceScreen preferenceScreen = getPreferenceScreen();
         mClearShortcutsPreference = preferenceScreen.findPreference(CLEAR_SHORTCUTS_PREF);
         mSearchEngineSettingsPreference = (PreferenceScreen) preferenceScreen.findPreference(
                 SEARCH_ENGINE_SETTINGS_PREF);
         mSourcePreferences = (PreferenceGroup) getPreferenceScreen().findPreference(
                 SEARCH_SOURCES_PREF);

         mClearShortcutsPreference.setOnPreferenceClickListener(this);

         updateClearShortcutsPreference();
         populateSourcePreference();
         populateSearchEnginePreference();
     }

     @Override
     protected void onDestroy() {
         mSources.close();
         mShortcuts.close();
         super.onDestroy();
     }

     /**
      * Enables/disables the "Clear search shortcuts" preference depending
      * on whether there is any search history.
      */
     private void updateClearShortcutsPreference() {
         boolean hasHistory = mShortcuts.hasHistory();
         if (DBG) Log.d(TAG, "hasHistory()=" + hasHistory);
         mClearShortcutsPreference.setEnabled(hasHistory);
     }

     /**
      * Populates the preference item for the web search engine, which links to further
      * search settings.
      */
     private void populateSearchEnginePreference() {
         PackageManager pm = getPackageManager();

         // Try to find EnhancedGoogleSearch if installed.
         ComponentName webSearchComponent;
         try {
             webSearchComponent = ComponentName.unflattenFromString(
                     Searchables.ENHANCED_GOOGLE_SEARCH_COMPONENT_NAME);
             pm.getActivityInfo(webSearchComponent, 0);
         } catch (PackageManager.NameNotFoundException e1) {
             // EnhancedGoogleSearch is not installed. Try to get GoogleSearch.
             try {
                 webSearchComponent = ComponentName.unflattenFromString(
                         Searchables.GOOGLE_SEARCH_COMPONENT_NAME);
                 pm.getActivityInfo(webSearchComponent, 0);
             } catch (PackageManager.NameNotFoundException e2) {
                 throw new RuntimeException("could not find a web search provider");
             }
         }

         ResolveInfo matchedInfo = findWebSearchSettingsActivity(webSearchComponent);
         if (matchedInfo == null) {
             throw new RuntimeException("could not find settings for web search provider");
         }

         Intent intent = createWebSearchSettingsIntent(matchedInfo);
         String searchEngineSettingsLabel =
                 matchedInfo.activityInfo.loadLabel(pm).toString();
         mSearchEngineSettingsPreference.setTitle(searchEngineSettingsLabel);

         mSearchEngineSettingsPreference.setIntent(intent);
     }

     /**
      * Returns the activity in the provided package that satisfies the
      * {@link SearchManager#INTENT_ACTION_WEB_SEARCH_SETTINGS} intent, or null
      * if none.
      */
     private ResolveInfo findWebSearchSettingsActivity(ComponentName component) {
         // Get all the activities which satisfy the WEB_SEARCH_SETTINGS intent.
         PackageManager pm = getPackageManager();
         Intent intent = new Intent(SearchManager.INTENT_ACTION_WEB_SEARCH_SETTINGS);
         List<ResolveInfo> activitiesWithWebSearchSettings = pm.queryIntentActivities(intent, 0);

         String packageName = component.getPackageName();
         String name = component.getClassName();

         // Iterate through them and see if any of them are the activity we're looking for.
         for (ResolveInfo resolveInfo : activitiesWithWebSearchSettings) {
             if (packageName.equals(resolveInfo.activityInfo.packageName)
                     && name.equals(resolveInfo.activityInfo.name)) {
                 return resolveInfo;
             }
         }

         // If there is no exact match, look for one in the right package
         for (ResolveInfo resolveInfo : activitiesWithWebSearchSettings) {
             if (packageName.equals(resolveInfo.activityInfo.packageName)) {
                 return resolveInfo;
             }
         }

         return null;
     }

     /**
      * Creates an intent for accessing the web search settings from the provided ResolveInfo
      * representing an activity.
      */
     private Intent createWebSearchSettingsIntent(ResolveInfo info) {
         Intent intent = new Intent(SearchManager.INTENT_ACTION_WEB_SEARCH_SETTINGS);
         intent.setComponent(
                 new ComponentName(info.activityInfo.packageName, info.activityInfo.name));
         return intent;
     }

     /**
      * Fills the suggestion source list.
      */
     private void populateSourcePreference() {
         for (SuggestionSource source : mSources.getSuggestionSources()) {
             Preference pref = createSourcePreference(source);
             if (pref != null) {
                 if (DBG) Log.d(TAG, "Adding search source: " + source);
                 mSourcePreferences.addPreference(pref);
             }
         }
     }

     /**
      * Adds a suggestion source to the list of suggestion source checkbox preferences.
      */
     private Preference createSourcePreference(SuggestionSource source) {
         CheckBoxPreference sourcePref = new CheckBoxPreference(this);
         sourcePref.setKey(mSources.getSourceEnabledPreference(source));
         sourcePref.setDefaultValue(mSources.isSourceDefaultEnabled(source));
         sourcePref.setOnPreferenceChangeListener(this);
         String label = source.getLabel();
         sourcePref.setTitle(label);
         sourcePref.setSummaryOn(source.getSettingsDescription());
         sourcePref.setSummaryOff(source.getSettingsDescription());
         return sourcePref;
     }

     /**
      * Handles clicks on the "Clear search shortcuts" preference.
      */
     public synchronized boolean onPreferenceClick(Preference preference) {
         if (preference == mClearShortcutsPreference) {
             showDialog(CLEAR_SHORTCUTS_CONFIRM_DIALOG);
             return true;
         }
         return false;
     }

     @Override
     protected Dialog onCreateDialog(int id) {
         switch (id) {
             case CLEAR_SHORTCUTS_CONFIRM_DIALOG:
                 return new AlertDialog.Builder(this)
                         .setTitle(R.string.clear_shortcuts)
                         .setMessage(R.string.clear_shortcuts_prompt)
                         .setPositiveButton(R.string.agree, new DialogInterface.OnClickListener() {
                             public void onClick(DialogInterface dialog, int whichButton) {
                                 if (DBG) Log.d(TAG, "Clearing history...");
                                 mShortcuts.clearHistory();
                                 updateClearShortcutsPreference();
                             }
                         })
                         .setNegativeButton(R.string.disagree, null).create();
             default:
                 Log.e(TAG, "unknown dialog" + id);
                 return null;
         }
     }

     /**
      * Informs our listeners (SuggestionSources objects) about the updated settings data.
      */
     private void broadcastSettingsChanged() {
         // We use a message broadcast since the listeners could be in multiple processes.
         Intent intent = new Intent(SearchManager.INTENT_ACTION_SEARCH_SETTINGS_CHANGED);
         Log.i(TAG, "Broadcasting: " + intent);
         sendBroadcast(intent);
     }

     public synchronized boolean onPreferenceChange(Preference preference, Object newValue) {
         broadcastSettingsChanged();
         return true;
     }

 }
	/*
	* 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.globalsearch;

	import android.app.AlertDialog;
	import android.app.Dialog;
	import android.app.SearchManager;
	import android.content.ComponentName;
	import android.content.Context;
	import android.content.DialogInterface;
	import android.content.Intent;
	import android.content.pm.ActivityInfo;
	import android.content.pm.PackageManager;
	import android.content.pm.ResolveInfo;
	import android.content.res.Resources;
	import android.os.Bundle;
	import android.preference.CheckBoxPreference;
	import android.preference.ListPreference;
	import android.preference.Preference;
	import android.preference.PreferenceActivity;
	import android.preference.PreferenceGroup;
	import android.preference.PreferenceScreen;
	import android.preference.Preference.OnPreferenceChangeListener;
	import android.preference.Preference.OnPreferenceClickListener;
	import android.provider.Settings;
	import android.provider.Settings.SettingNotFoundException;
	import android.server.search.SearchableInfo;
	import android.server.search.Searchables;
	import android.util.Log;

	import java.util.ArrayList;
	import java.util.List;

	/**
	* Activity for setting global search preferences. Changes to search preferences trigger a broadcast
	* intent that causes all SuggestionSources objects to be updated.
	*/
	public class SearchSettings extends PreferenceActivity
	implements OnPreferenceClickListener, OnPreferenceChangeListener {

	private static final boolean DBG = false;
	private static final String TAG = "SearchSettings";

	// Only used to find the preferences after inflating
	private static final String CLEAR_SHORTCUTS_PREF = "clear_shortcuts";
	private static final String SEARCH_ENGINE_SETTINGS_PREF = "search_engine_settings";
	private static final String SEARCH_SOURCES_PREF = "search_sources";

	private SearchManager mSearchManager;

	// These instances are not shared with SuggestionProvider
	private SuggestionSources mSources;
	private ShortcutRepository mShortcuts;

	// References to the top-level preference objects
	private Preference mClearShortcutsPreference;
	private PreferenceScreen mSearchEngineSettingsPreference;
	private PreferenceGroup mSourcePreferences;

	// Dialog ids
	private static final int CLEAR_SHORTCUTS_CONFIRM_DIALOG = 0;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
	super.onCreate(savedInstanceState);

	mSearchManager = (SearchManager) getSystemService(Context.SEARCH_SERVICE);

	mSources = new SuggestionSources(this);
	mSources.load();
	mShortcuts = ShortcutRepositoryImplLog.create(this);
	getPreferenceManager().setSharedPreferencesName(SuggestionSources.PREFERENCES_NAME);

	addPreferencesFromResource(R.xml.preferences);

	PreferenceScreen preferenceScreen = getPreferenceScreen();
	mClearShortcutsPreference = preferenceScreen.findPreference(CLEAR_SHORTCUTS_PREF);
	mSearchEngineSettingsPreference = (PreferenceScreen) preferenceScreen.findPreference(
	SEARCH_ENGINE_SETTINGS_PREF);
	mSourcePreferences = (PreferenceGroup) getPreferenceScreen().findPreference(
	SEARCH_SOURCES_PREF);

	mClearShortcutsPreference.setOnPreferenceClickListener(this);

	updateClearShortcutsPreference();
	populateSourcePreference();
	populateSearchEnginePreference();
	}

	@Override
	protected void onDestroy() {
	mSources.close();
	mShortcuts.close();
	super.onDestroy();
	}

	/**
	* Enables/disables the "Clear search shortcuts" preference depending
	* on whether there is any search history.
	*/
	private void updateClearShortcutsPreference() {
	boolean hasHistory = mShortcuts.hasHistory();
	if (DBG) Log.d(TAG, "hasHistory()=" + hasHistory);
	mClearShortcutsPreference.setEnabled(hasHistory);
	}

	/**
	* Populates the preference item for the web search engine, which links to further
	* search settings.
	*/
	private void populateSearchEnginePreference() {
	PackageManager pm = getPackageManager();

	// Try to find EnhancedGoogleSearch if installed.
	ComponentName webSearchComponent;
	try {
	webSearchComponent = ComponentName.unflattenFromString(
	Searchables.ENHANCED_GOOGLE_SEARCH_COMPONENT_NAME);
	pm.getActivityInfo(webSearchComponent, 0);
	} catch (PackageManager.NameNotFoundException e1) {
	// EnhancedGoogleSearch is not installed. Try to get GoogleSearch.
	try {
	webSearchComponent = ComponentName.unflattenFromString(
	Searchables.GOOGLE_SEARCH_COMPONENT_NAME);
	pm.getActivityInfo(webSearchComponent, 0);
	} catch (PackageManager.NameNotFoundException e2) {
	throw new RuntimeException("could not find a web search provider");
	}
	}

	ResolveInfo matchedInfo = findWebSearchSettingsActivity(webSearchComponent);
	if (matchedInfo == null) {
	throw new RuntimeException("could not find settings for web search provider");
	}

	Intent intent = createWebSearchSettingsIntent(matchedInfo);
	String searchEngineSettingsLabel =
	matchedInfo.activityInfo.loadLabel(pm).toString();
	mSearchEngineSettingsPreference.setTitle(searchEngineSettingsLabel);

	mSearchEngineSettingsPreference.setIntent(intent);
	}

	/**
	* Returns the activity in the provided package that satisfies the
	* {@link SearchManager#INTENT_ACTION_WEB_SEARCH_SETTINGS} intent, or null
	* if none.
	*/
	private ResolveInfo findWebSearchSettingsActivity(ComponentName component) {
	// Get all the activities which satisfy the WEB_SEARCH_SETTINGS intent.
	PackageManager pm = getPackageManager();
	Intent intent = new Intent(SearchManager.INTENT_ACTION_WEB_SEARCH_SETTINGS);
	List<ResolveInfo> activitiesWithWebSearchSettings = pm.queryIntentActivities(intent, 0);

	String packageName = component.getPackageName();
	String name = component.getClassName();

	// Iterate through them and see if any of them are the activity we're looking for.
	for (ResolveInfo resolveInfo : activitiesWithWebSearchSettings) {
	if (packageName.equals(resolveInfo.activityInfo.packageName)
	&& name.equals(resolveInfo.activityInfo.name)) {
	return resolveInfo;
	}
	}

	// If there is no exact match, look for one in the right package
	for (ResolveInfo resolveInfo : activitiesWithWebSearchSettings) {
	if (packageName.equals(resolveInfo.activityInfo.packageName)) {
	return resolveInfo;
	}
	}

	return null;
	}

	/**
	* Creates an intent for accessing the web search settings from the provided ResolveInfo
	* representing an activity.
	*/
	private Intent createWebSearchSettingsIntent(ResolveInfo info) {
	Intent intent = new Intent(SearchManager.INTENT_ACTION_WEB_SEARCH_SETTINGS);
	intent.setComponent(
	new ComponentName(info.activityInfo.packageName, info.activityInfo.name));
	return intent;
	}

	/**
	* Fills the suggestion source list.
	*/
	private void populateSourcePreference() {
	for (SuggestionSource source : mSources.getSuggestionSources()) {
	Preference pref = createSourcePreference(source);
	if (pref != null) {
	if (DBG) Log.d(TAG, "Adding search source: " + source);
	mSourcePreferences.addPreference(pref);
	}
	}
	}

	/**
	* Adds a suggestion source to the list of suggestion source checkbox preferences.
	*/
	private Preference createSourcePreference(SuggestionSource source) {
	CheckBoxPreference sourcePref = new CheckBoxPreference(this);
	sourcePref.setKey(mSources.getSourceEnabledPreference(source));
	sourcePref.setDefaultValue(mSources.isSourceDefaultEnabled(source));
	sourcePref.setOnPreferenceChangeListener(this);
	String label = source.getLabel();
	sourcePref.setTitle(label);
	sourcePref.setSummaryOn(source.getSettingsDescription());
	sourcePref.setSummaryOff(source.getSettingsDescription());
	return sourcePref;
	}

	/**
	* Handles clicks on the "Clear search shortcuts" preference.
	*/
	public synchronized boolean onPreferenceClick(Preference preference) {
	if (preference == mClearShortcutsPreference) {
	showDialog(CLEAR_SHORTCUTS_CONFIRM_DIALOG);
	return true;
	}
	return false;
	}

	@Override
	protected Dialog onCreateDialog(int id) {
	switch (id) {
	case CLEAR_SHORTCUTS_CONFIRM_DIALOG:
	return new AlertDialog.Builder(this)
	.setTitle(R.string.clear_shortcuts)
	.setMessage(R.string.clear_shortcuts_prompt)
	.setPositiveButton(R.string.agree, new DialogInterface.OnClickListener() {
	public void onClick(DialogInterface dialog, int whichButton) {
	if (DBG) Log.d(TAG, "Clearing history...");
	mShortcuts.clearHistory();
	updateClearShortcutsPreference();
	}
	})
	.setNegativeButton(R.string.disagree, null).create();
	default:
	Log.e(TAG, "unknown dialog" + id);
	return null;
	}
	}

	/**
	* Informs our listeners (SuggestionSources objects) about the updated settings data.
	*/
	private void broadcastSettingsChanged() {
	// We use a message broadcast since the listeners could be in multiple processes.
	Intent intent = new Intent(SearchManager.INTENT_ACTION_SEARCH_SETTINGS_CHANGED);
	Log.i(TAG, "Broadcasting: " + intent);
	sendBroadcast(intent);
	}

	public synchronized boolean onPreferenceChange(Preference preference, Object newValue) {
	broadcastSettingsChanged();
	return true;
	}

	}