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      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.graphics.IconNormalizer.ICON_VISIBLE_AREA_FACTOR;
     23 
     24 import android.content.Context;
     25 import android.graphics.Rect;
     26 import android.text.Selection;
     27 import android.text.Spannable;
     28 import android.text.SpannableString;
     29 import android.text.SpannableStringBuilder;
     30 import android.text.method.TextKeyListener;
     31 import android.util.AttributeSet;
     32 import android.view.KeyEvent;
     33 import android.view.View;
     34 import android.view.ViewGroup.MarginLayoutParams;
     35 
     36 import com.android.launcher3.DeviceProfile;
     37 import com.android.launcher3.ExtendedEditText;
     38 import com.android.launcher3.Insettable;
     39 import com.android.launcher3.Launcher;
     40 import com.android.launcher3.R;
     41 import com.android.launcher3.allapps.AllAppsContainerView;
     42 import com.android.launcher3.allapps.AllAppsStore;
     43 import com.android.launcher3.allapps.AlphabeticalAppsList;
     44 import com.android.launcher3.allapps.SearchUiManager;
     45 import com.android.launcher3.graphics.TintedDrawableSpan;
     46 import com.android.launcher3.util.ComponentKey;
     47 
     48 import java.util.ArrayList;
     49 
     50 /**
     51  * Layout to contain the All-apps search UI.
     52  */
     53 public class AppsSearchContainerLayout extends ExtendedEditText
     54         implements SearchUiManager, AllAppsSearchBarController.Callbacks,
     55         AllAppsStore.OnUpdateListener, Insettable {
     56 
     57 
     58     private final Launcher mLauncher;
     59     private final AllAppsSearchBarController mSearchBarController;
     60     private final SpannableStringBuilder mSearchQueryBuilder;
     61 
     62     private AlphabeticalAppsList mApps;
     63     private AllAppsContainerView mAppsView;
     64 
     65     // This value was used to position the QSB. We store it here for translationY animations.
     66     private final float mFixedTranslationY;
     67     private final float mMarginTopAdjusting;
     68 
     69     public AppsSearchContainerLayout(Context context) {
     70         this(context, null);
     71     }
     72 
     73     public AppsSearchContainerLayout(Context context, AttributeSet attrs) {
     74         this(context, attrs, 0);
     75     }
     76 
     77     public AppsSearchContainerLayout(Context context, AttributeSet attrs, int defStyleAttr) {
     78         super(context, attrs, defStyleAttr);
     79 
     80         mLauncher = Launcher.getLauncher(context);
     81         mSearchBarController = new AllAppsSearchBarController();
     82 
     83         mSearchQueryBuilder = new SpannableStringBuilder();
     84         Selection.setSelection(mSearchQueryBuilder, 0);
     85 
     86         mFixedTranslationY = getTranslationY();
     87         mMarginTopAdjusting = mFixedTranslationY - getPaddingTop();
     88 
     89         // Update the hint to contain the icon.
     90         // Prefix the original hint with two spaces. The first space gets replaced by the icon
     91         // using span. The second space is used for a singe space character between the hint
     92         // and the icon.
     93         SpannableString spanned = new SpannableString("  " + getHint());
     94         spanned.setSpan(new TintedDrawableSpan(getContext(), R.drawable.ic_allapps_search),
     95                 0, 1, Spannable.SPAN_EXCLUSIVE_INCLUSIVE);
     96         setHint(spanned);
     97     }
     98 
     99     @Override
    100     protected void onAttachedToWindow() {
    101         super.onAttachedToWindow();
    102         mLauncher.getAppsView().getAppsStore().addUpdateListener(this);
    103     }
    104 
    105     @Override
    106     protected void onDetachedFromWindow() {
    107         super.onDetachedFromWindow();
    108         mLauncher.getAppsView().getAppsStore().removeUpdateListener(this);
    109     }
    110 
    111     @Override
    112     protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
    113         // Update the width to match the grid padding
    114         DeviceProfile dp = mLauncher.getDeviceProfile();
    115         int myRequestedWidth = getSize(widthMeasureSpec);
    116         int rowWidth = myRequestedWidth - mAppsView.getActiveRecyclerView().getPaddingLeft()
    117                 - mAppsView.getActiveRecyclerView().getPaddingRight();
    118 
    119         int cellWidth = DeviceProfile.calculateCellWidth(rowWidth, dp.inv.numHotseatIcons);
    120         int iconVisibleSize = Math.round(ICON_VISIBLE_AREA_FACTOR * dp.iconSizePx);
    121         int iconPadding = cellWidth - iconVisibleSize;
    122 
    123         int myWidth = rowWidth - iconPadding + getPaddingLeft() + getPaddingRight();
    124         super.onMeasure(makeMeasureSpec(myWidth, EXACTLY), heightMeasureSpec);
    125     }
    126 
    127     @Override
    128     protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
    129         super.onLayout(changed, left, top, right, bottom);
    130 
    131         // Shift the widget horizontally so that its centered in the parent (b/63428078)
    132         View parent = (View) getParent();
    133         int availableWidth = parent.getWidth() - parent.getPaddingLeft() - parent.getPaddingRight();
    134         int myWidth = right - left;
    135         int expectedLeft = parent.getPaddingLeft() + (availableWidth - myWidth) / 2;
    136         int shift = expectedLeft - left;
    137         setTranslationX(shift);
    138     }
    139 
    140     @Override
    141     public void initialize(AllAppsContainerView appsView) {
    142         mApps = appsView.getApps();
    143         mAppsView = appsView;
    144         mSearchBarController.initialize(
    145                 new DefaultAppSearchAlgorithm(mApps.getApps()), this, mLauncher, this);
    146     }
    147 
    148     @Override
    149     public void onAppsUpdated() {
    150         mSearchBarController.refreshSearchResult();
    151     }
    152 
    153     @Override
    154     public void resetSearch() {
    155         mSearchBarController.reset();
    156     }
    157 
    158     @Override
    159     public void preDispatchKeyEvent(KeyEvent event) {
    160         // Determine if the key event was actual text, if so, focus the search bar and then dispatch
    161         // the key normally so that it can process this key event
    162         if (!mSearchBarController.isSearchFieldFocused() &&
    163                 event.getAction() == KeyEvent.ACTION_DOWN) {
    164             final int unicodeChar = event.getUnicodeChar();
    165             final boolean isKeyNotWhitespace = unicodeChar > 0 &&
    166                     !Character.isWhitespace(unicodeChar) && !Character.isSpaceChar(unicodeChar);
    167             if (isKeyNotWhitespace) {
    168                 boolean gotKey = TextKeyListener.getInstance().onKeyDown(this, mSearchQueryBuilder,
    169                         event.getKeyCode(), event);
    170                 if (gotKey && mSearchQueryBuilder.length() > 0) {
    171                     mSearchBarController.focusSearchField();
    172                 }
    173             }
    174         }
    175     }
    176 
    177     @Override
    178     public void onSearchResult(String query, ArrayList<ComponentKey> apps) {
    179         if (apps != null) {
    180             mApps.setOrderedFilter(apps);
    181             notifyResultChanged();
    182             mAppsView.setLastSearchQuery(query);
    183         }
    184     }
    185 
    186     @Override
    187     public void clearSearchResult() {
    188         if (mApps.setOrderedFilter(null)) {
    189             notifyResultChanged();
    190         }
    191 
    192         // Clear the search query
    193         mSearchQueryBuilder.clear();
    194         mSearchQueryBuilder.clearSpans();
    195         Selection.setSelection(mSearchQueryBuilder, 0);
    196         mAppsView.onClearSearchResult();
    197     }
    198 
    199     private void notifyResultChanged() {
    200         mAppsView.onSearchResultsChanged();
    201     }
    202 
    203     @Override
    204     public void setInsets(Rect insets) {
    205         MarginLayoutParams mlp = (MarginLayoutParams) getLayoutParams();
    206         mlp.topMargin = Math.round(Math.max(-mFixedTranslationY, insets.top - mMarginTopAdjusting));
    207         requestLayout();
    208 
    209         DeviceProfile dp = mLauncher.getDeviceProfile();
    210         if (dp.isVerticalBarLayout()) {
    211             mLauncher.getAllAppsController().setScrollRangeDelta(0);
    212         } else {
    213             mLauncher.getAllAppsController().setScrollRangeDelta(
    214                     insets.bottom + mlp.topMargin + mFixedTranslationY);
    215         }
    216     }
    217 }
    218