content: /*
   * Copyright (C) 2015 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.launcher3.allapps.search;
  
  import android.content.Intent;
  import android.text.Editable;
  import android.text.TextUtils;
  import android.text.TextWatcher;
  import android.view.KeyEvent;
  import android.view.View;
  import android.view.View.OnFocusChangeListener;
  import android.view.inputmethod.EditorInfo;
  import android.widget.TextView;
  import android.widget.TextView.OnEditorActionListener;
  
  import com.android.launcher3.AppInfo;
  import com.android.launcher3.ExtendedEditText;
  import com.android.launcher3.Launcher;
  import com.android.launcher3.Utilities;
  import com.android.launcher3.allapps.AlphabeticalAppsList;
  import com.android.launcher3.model.AppLaunchTracker;
  import com.android.launcher3.util.ComponentKey;
  import com.android.launcher3.util.PackageManagerHelper;
  
  import java.util.ArrayList;
  
  /**
   * An interface to a search box that AllApps can command.
   */
  public class AllAppsSearchBarController
          implements TextWatcher, OnEditorActionListener, ExtendedEditText.OnBackKeyListener,
          OnFocusChangeListener {
  
      protected Launcher mLauncher;
      protected Callbacks mCb;
      protected ExtendedEditText mInput;
      protected String mQuery;
  
      protected SearchAlgorithm mSearchAlgorithm;
  
      public void setVisibility(int visibility) {
          mInput.setVisibility(visibility);
      }
      /**
       * Sets the references to the apps model and the search result callback.
       */
      public final void initialize(
              SearchAlgorithm searchAlgorithm, ExtendedEditText input,
              Launcher launcher, Callbacks cb) {
          mCb = cb;
          mLauncher = launcher;
  
          mInput = input;
          mInput.addTextChangedListener(this);
          mInput.setOnEditorActionListener(this);
          mInput.setOnBackKeyListener(this);
          mInput.setOnFocusChangeListener(this);
          mSearchAlgorithm = searchAlgorithm;
      }
  
      @Override
      public void beforeTextChanged(CharSequence s, int start, int count, int after) {
          // Do nothing
      }
  
      @Override
      public void onTextChanged(CharSequence s, int start, int before, int count) {
          // Do nothing
      }
  
      @Override
      public void afterTextChanged(final Editable s) {
          mQuery = s.toString();
          if (mQuery.isEmpty()) {
              mSearchAlgorithm.cancel(true);
              mCb.clearSearchResult();
          } else {
              mSearchAlgorithm.cancel(false);
              mSearchAlgorithm.doSearch(mQuery, mCb);
          }
      }
  
      public void refreshSearchResult() {
          if (TextUtils.isEmpty(mQuery)) {
              return;
          }
          // If play store continues auto updating an app, we want to show partial result.
          mSearchAlgorithm.cancel(false);
          mSearchAlgorithm.doSearch(mQuery, mCb);
      }
  
      @Override
      public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
          // Skip if it's not the right action
          if (actionId != EditorInfo.IME_ACTION_SEARCH) {
              return false;
          }
  
          // Skip if the query is empty
          String query = v.getText().toString();
          if (query.isEmpty()) {
              return false;
          }
  
          AlphabeticalAppsList list = mLauncher.getAppsView().getApps();
  
          AppInfo itemInfo;
          Intent intent;
          if (list.hasNoFilteredResults()) {
              itemInfo = null;
              intent = PackageManagerHelper.getMarketSearchIntent(mLauncher, query);
          } else {
              itemInfo = list.getFilteredApps().get(0);
              intent = itemInfo.getIntent();
          }
  
          return mLauncher.startActivitySafely(v,
                  intent, itemInfo,
                  AppLaunchTracker.CONTAINER_SEARCH);
  
      }
  
      @Override
      public boolean onBackKey() {
          // Only hide the search field if there is no query
          String query = Utilities.trim(mInput.getEditableText().toString());
          if (query.isEmpty()) {
              reset();
              return true;
          }
          return false;
      }
  
      @Override
      public void onFocusChange(View view, boolean hasFocus) {
          if (!hasFocus) {
              mInput.hideKeyboard();
          }
      }
  
      /**
       * Resets the search bar state.
       */
      public void reset() {
          mQuery = null;
          mCb.clearSearchResult();
          mInput.reset();
      }
  
      /**
       * Focuses the search field to handle key events.
       */
      public void focusSearchField() {
          mInput.showKeyboard();
      }
  
      /**
       * Returns whether the search field is focused.
       */
      public boolean isSearchFieldFocused() {
          return mInput.isFocused();
      }
  
      public String searchQuery(){
          return mQuery;
      }
  
      /**
       * Callback for getting search results.
       */
      public interface Callbacks {
  
          /**
           * Called when the search is complete.
           *
           * @param apps sorted list of matching components or null if in case of failure.
           */
          void onSearchResult(String query, ArrayList<ComponentKey> apps);
  
          /**
           * Called when the search results should be cleared.
           */
          void clearSearchResult();
      }
  
  }