1 /* 2 * Copyright (C) 2015 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 package com.android.launcher3.allapps.search; 17 18 import android.text.Editable; 19 import android.text.SpannableStringBuilder; 20 import android.text.TextUtils; 21 import android.text.TextWatcher; 22 import android.text.style.SuggestionSpan; 23 import android.util.Log; 24 import android.view.KeyEvent; 25 import android.view.inputmethod.EditorInfo; 26 import android.widget.TextView; 27 import android.widget.TextView.OnEditorActionListener; 28 29 import com.android.launcher3.ExtendedEditText; 30 import com.android.launcher3.Utilities; 31 import com.android.launcher3.allapps.BaseAllAppsAdapter.AdapterItem; 32 import com.android.launcher3.search.SearchAlgorithm; 33 import com.android.launcher3.search.SearchCallback; 34 import com.android.launcher3.views.ActivityContext; 35 36 /** 37 * An interface to a search box that AllApps can command. 38 */ 39 public class AllAppsSearchBarController 40 implements TextWatcher, OnEditorActionListener, ExtendedEditText.OnBackKeyListener { 41 42 private static final String TAG = "AllAppsSearchBarController"; 43 protected ActivityContext mLauncher; 44 protected SearchCallback<AdapterItem> mCallback; 45 protected ExtendedEditText mInput; 46 protected String mQuery; 47 private String[] mTextConversions; 48 49 protected SearchAlgorithm<AdapterItem> mSearchAlgorithm; 50 setVisibility(int visibility)51 public void setVisibility(int visibility) { 52 mInput.setVisibility(visibility); 53 } 54 55 /** 56 * Sets the references to the apps model and the search result callback. 57 */ initialize( SearchAlgorithm<AdapterItem> searchAlgorithm, ExtendedEditText input, ActivityContext launcher, SearchCallback<AdapterItem> callback)58 public final void initialize( 59 SearchAlgorithm<AdapterItem> searchAlgorithm, ExtendedEditText input, 60 ActivityContext launcher, SearchCallback<AdapterItem> callback) { 61 mCallback = callback; 62 mLauncher = launcher; 63 64 mInput = input; 65 mInput.addTextChangedListener(this); 66 mInput.setOnEditorActionListener(this); 67 mInput.setOnBackKeyListener(this); 68 mSearchAlgorithm = searchAlgorithm; 69 } 70 71 @Override beforeTextChanged(CharSequence charSequence, int i, int i1, int i2)72 public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) { 73 // Do nothing 74 } 75 76 @Override onTextChanged(CharSequence s, int start, int before, int count)77 public void onTextChanged(CharSequence s, int start, int before, int count) { 78 mTextConversions = extractTextConversions(s); 79 } 80 81 /** 82 * Extract text conversions from composing text and send them for search. 83 */ extractTextConversions(CharSequence text)84 public static String[] extractTextConversions(CharSequence text) { 85 if (text instanceof SpannableStringBuilder) { 86 SpannableStringBuilder spanned = (SpannableStringBuilder) text; 87 SuggestionSpan[] suggestionSpans = 88 spanned.getSpans(0, text.length(), SuggestionSpan.class); 89 if (suggestionSpans != null && suggestionSpans.length > 0) { 90 spanned.removeSpan(suggestionSpans[0]); 91 return suggestionSpans[0].getSuggestions(); 92 } 93 } 94 return null; 95 } 96 97 @Override afterTextChanged(final Editable s)98 public void afterTextChanged(final Editable s) { 99 mQuery = s.toString(); 100 if (mQuery.isEmpty()) { 101 mSearchAlgorithm.cancel(true); 102 mCallback.clearSearchResult(); 103 } else { 104 mSearchAlgorithm.cancel(false); 105 mSearchAlgorithm.doSearch(mQuery, mTextConversions, mCallback); 106 } 107 } 108 refreshSearchResult()109 public void refreshSearchResult() { 110 if (TextUtils.isEmpty(mQuery)) { 111 return; 112 } 113 // If play store continues auto updating an app, we want to show partial result. 114 mSearchAlgorithm.cancel(false); 115 mSearchAlgorithm.doSearch(mQuery, mCallback); 116 } 117 118 @Override onEditorAction(TextView v, int actionId, KeyEvent event)119 public boolean onEditorAction(TextView v, int actionId, KeyEvent event) { 120 121 if (actionId == EditorInfo.IME_ACTION_SEARCH || actionId == EditorInfo.IME_ACTION_GO || ( 122 actionId == EditorInfo.IME_NULL && event != null 123 && event.getAction() == KeyEvent.ACTION_DOWN)) { 124 if (actionId == EditorInfo.IME_NULL) { 125 Log.i(TAG, "User pressed ENTER key"); 126 } else { 127 Log.i(TAG, "User tapped ime search button"); 128 } 129 // selectFocusedView should return SearchTargetEvent that is passed onto onClick 130 return mLauncher.getAppsView().getMainAdapterProvider().launchHighlightedItem(); 131 } 132 return false; 133 } 134 135 @Override onBackKey()136 public boolean onBackKey() { 137 // Only hide the search field if there is no query 138 String query = Utilities.trim(mInput.getEditableText().toString()); 139 if (query.isEmpty()) { 140 reset(); 141 return true; 142 } 143 return false; 144 } 145 146 /** 147 * Resets the search bar state. 148 */ reset()149 public void reset() { 150 mCallback.clearSearchResult(); 151 mInput.reset(); 152 mInput.clearFocus(); 153 mInput.hideKeyboard(); 154 mQuery = null; 155 } 156 157 /** 158 * Focuses the search field to handle key events. 159 */ focusSearchField()160 public void focusSearchField() { 161 mInput.showKeyboard(); 162 } 163 164 /** 165 * Returns whether the search field is focused. 166 */ isSearchFieldFocused()167 public boolean isSearchFieldFocused() { 168 return mInput.isFocused(); 169 } 170 } 171