1 /*
2  * Copyright (C) 2017 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 static android.view.View.MeasureSpec.EXACTLY;
19 import static android.view.View.MeasureSpec.getSize;
20 import static android.view.View.MeasureSpec.makeMeasureSpec;
21 
22 import static com.android.launcher3.Utilities.prefixTextWithIcon;
23 import static com.android.launcher3.icons.IconNormalizer.ICON_VISIBLE_AREA_FACTOR;
24 
25 import android.content.Context;
26 import android.graphics.Rect;
27 import android.text.Selection;
28 import android.text.SpannableStringBuilder;
29 import android.text.method.TextKeyListener;
30 import android.util.AttributeSet;
31 import android.view.KeyEvent;
32 import android.view.View;
33 import android.view.ViewGroup.MarginLayoutParams;
34 
35 import com.android.launcher3.DeviceProfile;
36 import com.android.launcher3.ExtendedEditText;
37 import com.android.launcher3.Insettable;
38 import com.android.launcher3.R;
39 import com.android.launcher3.allapps.ActivityAllAppsContainerView;
40 import com.android.launcher3.allapps.AllAppsStore;
41 import com.android.launcher3.allapps.BaseAllAppsAdapter.AdapterItem;
42 import com.android.launcher3.allapps.SearchUiManager;
43 import com.android.launcher3.search.SearchCallback;
44 import com.android.launcher3.views.ActivityContext;
45 
46 import java.util.ArrayList;
47 
48 /**
49  * Layout to contain the All-apps search UI.
50  */
51 public class AppsSearchContainerLayout extends ExtendedEditText
52         implements SearchUiManager, SearchCallback<AdapterItem>,
53         AllAppsStore.OnUpdateListener, Insettable {
54 
55     private final ActivityContext mLauncher;
56     private final AllAppsSearchBarController mSearchBarController;
57     private final SpannableStringBuilder mSearchQueryBuilder;
58 
59     private ActivityAllAppsContainerView<?> mAppsView;
60 
61     // The amount of pixels to shift down and overlap with the rest of the content.
62     private final int mContentOverlap;
63 
AppsSearchContainerLayout(Context context)64     public AppsSearchContainerLayout(Context context) {
65         this(context, null);
66     }
67 
AppsSearchContainerLayout(Context context, AttributeSet attrs)68     public AppsSearchContainerLayout(Context context, AttributeSet attrs) {
69         this(context, attrs, 0);
70     }
71 
AppsSearchContainerLayout(Context context, AttributeSet attrs, int defStyleAttr)72     public AppsSearchContainerLayout(Context context, AttributeSet attrs, int defStyleAttr) {
73         super(context, attrs, defStyleAttr);
74 
75         mLauncher = ActivityContext.lookupContext(context);
76         mSearchBarController = new AllAppsSearchBarController();
77 
78         mSearchQueryBuilder = new SpannableStringBuilder();
79         Selection.setSelection(mSearchQueryBuilder, 0);
80         setHint(prefixTextWithIcon(getContext(), R.drawable.ic_allapps_search, getHint()));
81 
82         mContentOverlap =
83                 getResources().getDimensionPixelSize(R.dimen.all_apps_search_bar_content_overlap);
84     }
85 
86     @Override
onAttachedToWindow()87     protected void onAttachedToWindow() {
88         super.onAttachedToWindow();
89         mAppsView.getAppsStore().addUpdateListener(this);
90     }
91 
92     @Override
onDetachedFromWindow()93     protected void onDetachedFromWindow() {
94         super.onDetachedFromWindow();
95         mAppsView.getAppsStore().removeUpdateListener(this);
96     }
97 
98     @Override
onMeasure(int widthMeasureSpec, int heightMeasureSpec)99     protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
100         // Update the width to match the grid padding
101         DeviceProfile dp = mLauncher.getDeviceProfile();
102         int myRequestedWidth = getSize(widthMeasureSpec);
103         int rowWidth = myRequestedWidth - mAppsView.getActiveRecyclerView().getPaddingLeft()
104                 - mAppsView.getActiveRecyclerView().getPaddingRight();
105 
106         int cellWidth = DeviceProfile.calculateCellWidth(rowWidth,
107                 dp.cellLayoutBorderSpacePx.x, dp.numShownHotseatIcons);
108         int iconVisibleSize = Math.round(ICON_VISIBLE_AREA_FACTOR * dp.iconSizePx);
109         int iconPadding = cellWidth - iconVisibleSize;
110 
111         int myWidth = rowWidth - iconPadding + getPaddingLeft() + getPaddingRight();
112         super.onMeasure(makeMeasureSpec(myWidth, EXACTLY), heightMeasureSpec);
113     }
114 
115     @Override
onLayout(boolean changed, int left, int top, int right, int bottom)116     protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
117         super.onLayout(changed, left, top, right, bottom);
118 
119         // Shift the widget horizontally so that its centered in the parent (b/63428078)
120         View parent = (View) getParent();
121         int availableWidth = parent.getWidth() - parent.getPaddingLeft() - parent.getPaddingRight();
122         int myWidth = right - left;
123         int expectedLeft = parent.getPaddingLeft() + (availableWidth - myWidth) / 2;
124         int shift = expectedLeft - left;
125         setTranslationX(shift);
126 
127         offsetTopAndBottom(mContentOverlap);
128     }
129 
130     @Override
initializeSearch(ActivityAllAppsContainerView<?> appsView)131     public void initializeSearch(ActivityAllAppsContainerView<?> appsView) {
132         mAppsView = appsView;
133         mSearchBarController.initialize(
134                 new DefaultAppSearchAlgorithm(getContext(), true),
135                 this, mLauncher, this);
136     }
137 
138     @Override
onAppsUpdated()139     public void onAppsUpdated() {
140         mSearchBarController.refreshSearchResult();
141     }
142 
143     @Override
resetSearch()144     public void resetSearch() {
145         mSearchBarController.reset();
146     }
147 
148     @Override
preDispatchKeyEvent(KeyEvent event)149     public void preDispatchKeyEvent(KeyEvent event) {
150         // Determine if the key event was actual text, if so, focus the search bar and then dispatch
151         // the key normally so that it can process this key event
152         if (!mSearchBarController.isSearchFieldFocused() &&
153                 event.getAction() == KeyEvent.ACTION_DOWN) {
154             final int unicodeChar = event.getUnicodeChar();
155             final boolean isKeyNotWhitespace = unicodeChar > 0 &&
156                     !Character.isWhitespace(unicodeChar) && !Character.isSpaceChar(unicodeChar);
157             if (isKeyNotWhitespace) {
158                 boolean gotKey = TextKeyListener.getInstance().onKeyDown(this, mSearchQueryBuilder,
159                         event.getKeyCode(), event);
160                 if (gotKey && mSearchQueryBuilder.length() > 0) {
161                     mSearchBarController.focusSearchField();
162                 }
163             }
164         }
165     }
166 
167     @Override
onSearchResult(String query, ArrayList<AdapterItem> items)168     public void onSearchResult(String query, ArrayList<AdapterItem> items) {
169         if (items != null) {
170             mAppsView.setSearchResults(items);
171         }
172     }
173 
174     @Override
clearSearchResult()175     public void clearSearchResult() {
176         // Clear the search query
177         mSearchQueryBuilder.clear();
178         mSearchQueryBuilder.clearSpans();
179         Selection.setSelection(mSearchQueryBuilder, 0);
180         mAppsView.onClearSearchResult();
181     }
182 
183     @Override
setInsets(Rect insets)184     public void setInsets(Rect insets) {
185         MarginLayoutParams mlp = (MarginLayoutParams) getLayoutParams();
186         mlp.topMargin = insets.top;
187         requestLayout();
188     }
189 
190     @Override
getEditText()191     public ExtendedEditText getEditText() {
192         return this;
193     }
194 }
195