summaryrefslogtreecommitdiffstats
path: root/src/com/android/launcher3/allapps/AllAppsGridAdapter.java
blob: 1f95133d49a3fccaf7a6cc4d72d7482703836667 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
/*
 * 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;

import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.content.pm.ResolveInfo;
import android.content.res.Resources;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.PointF;
import android.graphics.Rect;
import android.graphics.drawable.Drawable;
import android.support.v4.view.accessibility.AccessibilityRecordCompat;
import android.support.v4.view.accessibility.AccessibilityEventCompat;
import android.net.Uri;
import android.support.v7.widget.GridLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewConfiguration;
import android.view.ViewGroup;
import android.view.accessibility.AccessibilityEvent;
import android.widget.TextView;
import com.android.launcher3.AppInfo;
import com.android.launcher3.BubbleTextView;
import com.android.launcher3.Launcher;
import com.android.launcher3.R;
import com.android.launcher3.Utilities;
import com.android.launcher3.util.Thunk;

import java.util.HashMap;
import java.util.List;


/**
 * The grid view adapter of all the apps.
 */
public class AllAppsGridAdapter extends RecyclerView.Adapter<AllAppsGridAdapter.ViewHolder> {

    public static final String TAG = "AppsGridAdapter";
    private static final boolean DEBUG = false;

    // A section break in the grid
    public static final int SECTION_BREAK_VIEW_TYPE = 0;
    // A normal icon
    public static final int ICON_VIEW_TYPE = 1;
    // A prediction icon
    public static final int PREDICTION_ICON_VIEW_TYPE = 2;
    // The message shown when there are no filtered results
    public static final int EMPTY_SEARCH_VIEW_TYPE = 3;
    // A divider that separates the apps list and the search market button
    public static final int SEARCH_MARKET_DIVIDER_VIEW_TYPE = 4;
    // The message to continue to a market search when there are no filtered results
    public static final int SEARCH_MARKET_VIEW_TYPE = 5;

    /**
     * ViewHolder for each icon.
     */
    public static class ViewHolder extends RecyclerView.ViewHolder {
        public View mContent;

        public ViewHolder(View v) {
            super(v);
            mContent = v;
        }
    }

    /**
     * A subclass of GridLayoutManager that overrides accessibility values during app search.
     */
    public class AppsGridLayoutManager extends GridLayoutManager {

        public AppsGridLayoutManager(Context context) {
            super(context, 1, GridLayoutManager.VERTICAL, false);
        }

        @Override
        public void onInitializeAccessibilityEvent(AccessibilityEvent event) {
            super.onInitializeAccessibilityEvent(event);

            // Ensure that we only report the number apps for accessibility not including other
            // adapter views
            final AccessibilityRecordCompat record = AccessibilityEventCompat
                    .asRecord(event);
            record.setItemCount(mApps.getNumFilteredApps());
        }

        @Override
        public int getRowCountForAccessibility(RecyclerView.Recycler recycler,
                RecyclerView.State state) {
            if (mApps.hasNoFilteredResults()) {
                // Disregard the no-search-results text as a list item for accessibility
                return 0;
            } else {
                return super.getRowCountForAccessibility(recycler, state);
            }
        }
    }

    /**
     * Helper class to size the grid items.
     */
    public class GridSpanSizer extends GridLayoutManager.SpanSizeLookup {

        public GridSpanSizer() {
            super();
            setSpanIndexCacheEnabled(true);
        }

        @Override
        public int getSpanSize(int position) {
            switch (mApps.getAdapterItems().get(position).viewType) {
                case AllAppsGridAdapter.ICON_VIEW_TYPE:
                case AllAppsGridAdapter.PREDICTION_ICON_VIEW_TYPE:
                    return 1;
                default:
                    // Section breaks span the full width
                    return mAppsPerRow;
            }
        }
    }

    /**
     * Helper class to draw the section headers
     */
    public class GridItemDecoration extends RecyclerView.ItemDecoration {

        private static final boolean DEBUG_SECTION_MARGIN = false;
        private static final boolean FADE_OUT_SECTIONS = false;

        private HashMap<String, PointF> mCachedSectionBounds = new HashMap<>();
        private Rect mTmpBounds = new Rect();

        @Override
        public void onDraw(Canvas c, RecyclerView parent, RecyclerView.State state) {
            if (mApps.hasFilter() || mAppsPerRow == 0) {
                return;
            }

            if (DEBUG_SECTION_MARGIN) {
                Paint p = new Paint();
                p.setColor(0x33ff0000);
                c.drawRect(mBackgroundPadding.left, 0, mBackgroundPadding.left + mSectionNamesMargin,
                        parent.getMeasuredHeight(), p);
            }

            List<AlphabeticalAppsList.AdapterItem> items = mApps.getAdapterItems();
            boolean hasDrawnPredictedAppsDivider = false;
            boolean showSectionNames = mSectionNamesMargin > 0;
            int childCount = parent.getChildCount();
            int lastSectionTop = 0;
            int lastSectionHeight = 0;
            for (int i = 0; i < childCount; i++) {
                View child = parent.getChildAt(i);
                ViewHolder holder = (ViewHolder) parent.getChildViewHolder(child);
                if (!isValidHolderAndChild(holder, child, items)) {
                    continue;
                }

                if (shouldDrawItemDivider(holder, items) && !hasDrawnPredictedAppsDivider) {
                    // Draw the divider under the predicted apps
                    int top = child.getTop() + child.getHeight() + mPredictionBarDividerOffset;
                    c.drawLine(mBackgroundPadding.left, top,
                            parent.getWidth() - mBackgroundPadding.right, top,
                            mPredictedAppsDividerPaint);
                    hasDrawnPredictedAppsDivider = true;

                } else if (showSectionNames && shouldDrawItemSection(holder, i, items)) {
                    // At this point, we only draw sections for each section break;
                    int viewTopOffset = (2 * child.getPaddingTop());
                    int pos = holder.getPosition();
                    AlphabeticalAppsList.AdapterItem item = items.get(pos);
                    AlphabeticalAppsList.SectionInfo sectionInfo = item.sectionInfo;

                    // Draw all the sections for this index
                    String lastSectionName = item.sectionName;
                    for (int j = item.sectionAppIndex; j < sectionInfo.numApps; j++, pos++) {
                        AlphabeticalAppsList.AdapterItem nextItem = items.get(pos);
                        String sectionName = nextItem.sectionName;
                        if (nextItem.sectionInfo != sectionInfo) {
                            break;
                        }
                        if (j > item.sectionAppIndex && sectionName.equals(lastSectionName)) {
                            continue;
                        }


                        // Find the section name bounds
                        PointF sectionBounds = getAndCacheSectionBounds(sectionName);

                        // Calculate where to draw the section
                        int sectionBaseline = (int) (viewTopOffset + sectionBounds.y);
                        int x = mIsRtl ?
                                parent.getWidth() - mBackgroundPadding.left - mSectionNamesMargin :
                                        mBackgroundPadding.left;
                        x += (int) ((mSectionNamesMargin - sectionBounds.x) / 2f);
                        int y = child.getTop() + sectionBaseline;

                        // Determine whether this is the last row with apps in that section, if
                        // so, then fix the section to the row allowing it to scroll past the
                        // baseline, otherwise, bound it to the baseline so it's in the viewport
                        int appIndexInSection = items.get(pos).sectionAppIndex;
                        int nextRowPos = Math.min(items.size() - 1,
                                pos + mAppsPerRow - (appIndexInSection % mAppsPerRow));
                        AlphabeticalAppsList.AdapterItem nextRowItem = items.get(nextRowPos);
                        boolean fixedToRow = !sectionName.equals(nextRowItem.sectionName);
                        if (!fixedToRow) {
                            y = Math.max(sectionBaseline, y);
                        }

                        // In addition, if it overlaps with the last section that was drawn, then
                        // offset it so that it does not overlap
                        if (lastSectionHeight > 0 && y <= (lastSectionTop + lastSectionHeight)) {
                            y += lastSectionTop - y + lastSectionHeight;
                        }

                        // Draw the section header
                        if (FADE_OUT_SECTIONS) {
                            int alpha = 255;
                            if (fixedToRow) {
                                alpha = Math.min(255,
                                        (int) (255 * (Math.max(0, y) / (float) sectionBaseline)));
                            }
                            mSectionTextPaint.setAlpha(alpha);
                        }
                        c.drawText(sectionName, x, y, mSectionTextPaint);

                        lastSectionTop = y;
                        lastSectionHeight = (int) (sectionBounds.y + mSectionHeaderOffset);
                        lastSectionName = sectionName;
                    }
                    i += (sectionInfo.numApps - item.sectionAppIndex);
                }
            }
        }

        @Override
        public void getItemOffsets(Rect outRect, View view, RecyclerView parent,
                RecyclerView.State state) {
            // Do nothing
        }

        /**
         * Given a section name, return the bounds of the given section name.
         */
        private PointF getAndCacheSectionBounds(String sectionName) {
            PointF bounds = mCachedSectionBounds.get(sectionName);
            if (bounds == null) {
                mSectionTextPaint.getTextBounds(sectionName, 0, sectionName.length(), mTmpBounds);
                bounds = new PointF(mSectionTextPaint.measureText(sectionName), mTmpBounds.height());
                mCachedSectionBounds.put(sectionName, bounds);
            }
            return bounds;
        }

        /**
         * Returns whether we consider this a valid view holder for us to draw a divider or section for.
         */
        private boolean isValidHolderAndChild(ViewHolder holder, View child,
                List<AlphabeticalAppsList.AdapterItem> items) {
            // Ensure item is not already removed
            GridLayoutManager.LayoutParams lp = (GridLayoutManager.LayoutParams)
                    child.getLayoutParams();
            if (lp.isItemRemoved()) {
                return false;
            }
            // Ensure we have a valid holder
            if (holder == null) {
                return false;
            }
            // Ensure we have a holder position
            int pos = holder.getPosition();
            if (pos < 0 || pos >= items.size()) {
                return false;
            }
            return true;
        }

        /**
         * Returns whether to draw the divider for a given child.
         */
        private boolean shouldDrawItemDivider(ViewHolder holder,
                List<AlphabeticalAppsList.AdapterItem> items) {
            int pos = holder.getPosition();
            return items.get(pos).viewType == AllAppsGridAdapter.PREDICTION_ICON_VIEW_TYPE;
        }

        /**
         * Returns whether to draw the section for the given child.
         */
        private boolean shouldDrawItemSection(ViewHolder holder, int childIndex,
                List<AlphabeticalAppsList.AdapterItem> items) {
            int pos = holder.getPosition();
            AlphabeticalAppsList.AdapterItem item = items.get(pos);

            // Ensure it's an icon
            if (item.viewType != AllAppsGridAdapter.ICON_VIEW_TYPE) {
                return false;
            }
            // Draw the section header for the first item in each section
            return (childIndex == 0) ||
                    (items.get(pos - 1).viewType == AllAppsGridAdapter.SECTION_BREAK_VIEW_TYPE);
        }
    }

    private Launcher mLauncher;
    private LayoutInflater mLayoutInflater;
    @Thunk AlphabeticalAppsList mApps;
    private GridLayoutManager mGridLayoutMgr;
    private GridSpanSizer mGridSizer;
    private GridItemDecoration mItemDecoration;
    private View.OnTouchListener mTouchListener;
    private View.OnClickListener mIconClickListener;
    private View.OnLongClickListener mIconLongClickListener;
    @Thunk final Rect mBackgroundPadding = new Rect();
    @Thunk int mPredictionBarDividerOffset;
    @Thunk int mAppsPerRow;
    @Thunk boolean mIsRtl;

    // The text to show when there are no search results and no market search handler.
    private String mEmptySearchMessage;
    // The name of the market app which handles searches, to be used in the format str
    // below when updating the search-market view.  Only needs to be loaded once.
    private String mMarketAppName;
    // The text to show when there is a market app which can handle a specific query, updated
    // each time the search query changes.
    private String mMarketSearchMessage;
    // The intent to send off to the market app, updated each time the search query changes.
    private Intent mMarketSearchIntent;
    // The last query that the user entered into the search field
    private String mLastSearchQuery;

    // Section drawing
    @Thunk int mSectionNamesMargin;
    @Thunk int mSectionHeaderOffset;
    @Thunk Paint mSectionTextPaint;
    @Thunk Paint mPredictedAppsDividerPaint;

    public AllAppsGridAdapter(Launcher launcher, AlphabeticalAppsList apps,
            View.OnTouchListener touchListener, View.OnClickListener iconClickListener,
            View.OnLongClickListener iconLongClickListener) {
        Resources res = launcher.getResources();
        mLauncher = launcher;
        mApps = apps;
        mEmptySearchMessage = res.getString(R.string.all_apps_loading_message);
        mGridSizer = new GridSpanSizer();
        mGridLayoutMgr = new AppsGridLayoutManager(launcher);
        mGridLayoutMgr.setSpanSizeLookup(mGridSizer);
        mItemDecoration = new GridItemDecoration();
        mLayoutInflater = LayoutInflater.from(launcher);
        mTouchListener = touchListener;
        mIconClickListener = iconClickListener;
        mIconLongClickListener = iconLongClickListener;
        mSectionNamesMargin = res.getDimensionPixelSize(R.dimen.all_apps_grid_view_start_margin);
        mSectionHeaderOffset = res.getDimensionPixelSize(R.dimen.all_apps_grid_section_y_offset);

        mSectionTextPaint = new Paint();
        mSectionTextPaint.setTextSize(res.getDimensionPixelSize(
                R.dimen.all_apps_grid_section_text_size));
        mSectionTextPaint.setColor(res.getColor(R.color.all_apps_grid_section_text_color));
        mSectionTextPaint.setAntiAlias(true);

        mPredictedAppsDividerPaint = new Paint();
        mPredictedAppsDividerPaint.setStrokeWidth(Utilities.pxFromDp(1f, res.getDisplayMetrics()));
        mPredictedAppsDividerPaint.setColor(0x1E000000);
        mPredictedAppsDividerPaint.setAntiAlias(true);
        mPredictionBarDividerOffset =
                (-res.getDimensionPixelSize(R.dimen.all_apps_prediction_icon_bottom_padding) +
                        res.getDimensionPixelSize(R.dimen.all_apps_icon_top_bottom_padding)) / 2;

        // Resolve the market app handling additional searches
        PackageManager pm = launcher.getPackageManager();
        ResolveInfo marketInfo = pm.resolveActivity(createMarketSearchIntent(""),
                PackageManager.MATCH_DEFAULT_ONLY);
        if (marketInfo != null) {
            mMarketAppName = marketInfo.loadLabel(pm).toString();
        }
    }

    /**
     * Sets the number of apps per row.
     */
    public void setNumAppsPerRow(int appsPerRow) {
        mAppsPerRow = appsPerRow;
        mGridLayoutMgr.setSpanCount(appsPerRow);
    }

    /**
     * Sets whether we are in RTL mode.
     */
    public void setRtl(boolean rtl) {
        mIsRtl = rtl;
    }

    /**
     * Sets the last search query that was made, used to show when there are no results and to also
     * seed the intent for searching the market.
     */
    public void setLastSearchQuery(String query) {
        Resources res = mLauncher.getResources();
        String formatStr = res.getString(R.string.all_apps_no_search_results);
        mLastSearchQuery = query;
        mEmptySearchMessage = String.format(formatStr, query);
        if (mMarketAppName != null) {
            mMarketSearchMessage = String.format(res.getString(R.string.all_apps_search_market_message),
                    mMarketAppName);
            mMarketSearchIntent = createMarketSearchIntent(query);
        }
    }

    /**
     * Notifies the adapter of the background padding so that it can draw things correctly in the
     * item decorator.
     */
    public void updateBackgroundPadding(Rect padding) {
        mBackgroundPadding.set(padding);
    }

    /**
     * Returns the grid layout manager.
     */
    public GridLayoutManager getLayoutManager() {
        return mGridLayoutMgr;
    }

    /**
     * Returns the item decoration for the recycler view.
     */
    public RecyclerView.ItemDecoration getItemDecoration() {
        // We don't draw any headers when we are uncomfortably dense
        return mItemDecoration;
    }

    @Override
    public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        switch (viewType) {
            case SECTION_BREAK_VIEW_TYPE:
                return new ViewHolder(new View(parent.getContext()));
            case ICON_VIEW_TYPE: {
                BubbleTextView icon = (BubbleTextView) mLayoutInflater.inflate(
                        R.layout.all_apps_icon, parent, false);
                icon.setOnTouchListener(mTouchListener);
                icon.setOnClickListener(mIconClickListener);
                icon.setOnLongClickListener(mIconLongClickListener);
                icon.setLongPressTimeout(ViewConfiguration.get(parent.getContext())
                        .getLongPressTimeout());
                icon.setFocusable(true);
                return new ViewHolder(icon);
            }
            case PREDICTION_ICON_VIEW_TYPE: {
                BubbleTextView icon = (BubbleTextView) mLayoutInflater.inflate(
                        R.layout.all_apps_prediction_bar_icon, parent, false);
                icon.setOnTouchListener(mTouchListener);
                icon.setOnClickListener(mIconClickListener);
                icon.setOnLongClickListener(mIconLongClickListener);
                icon.setLongPressTimeout(ViewConfiguration.get(parent.getContext())
                        .getLongPressTimeout());
                icon.setFocusable(true);
                return new ViewHolder(icon);
            }
            case EMPTY_SEARCH_VIEW_TYPE:
                return new ViewHolder(mLayoutInflater.inflate(R.layout.all_apps_empty_search,
                        parent, false));
            case SEARCH_MARKET_DIVIDER_VIEW_TYPE:
                return new ViewHolder(mLayoutInflater.inflate(R.layout.all_apps_search_market_divider,
                        parent, false));
            case SEARCH_MARKET_VIEW_TYPE:
                View searchMarketView = mLayoutInflater.inflate(R.layout.all_apps_search_market,
                        parent, false);
                searchMarketView.setOnClickListener(new View.OnClickListener() {
                    @Override
                    public void onClick(View v) {
                        mLauncher.startSearchFromAllApps(v, mMarketSearchIntent, mLastSearchQuery);
                    }
                });
                return new ViewHolder(searchMarketView);
            default:
                throw new RuntimeException("Unexpected view type");
        }
    }

    @Override
    public void onBindViewHolder(ViewHolder holder, int position) {
        switch (holder.getItemViewType()) {
            case ICON_VIEW_TYPE: {
                AppInfo info = mApps.getAdapterItems().get(position).appInfo;
                BubbleTextView icon = (BubbleTextView) holder.mContent;
                icon.applyFromApplicationInfo(info);
                break;
            }
            case PREDICTION_ICON_VIEW_TYPE: {
                AppInfo info = mApps.getAdapterItems().get(position).appInfo;
                BubbleTextView icon = (BubbleTextView) holder.mContent;
                icon.applyFromApplicationInfo(info);
                break;
            }
            case EMPTY_SEARCH_VIEW_TYPE:
                TextView emptyViewText = (TextView) holder.mContent;
                emptyViewText.setText(mEmptySearchMessage);
                emptyViewText.setGravity(mApps.hasNoFilteredResults() ? Gravity.CENTER :
                        Gravity.START | Gravity.CENTER_VERTICAL);
                break;
            case SEARCH_MARKET_VIEW_TYPE:
                TextView searchView = (TextView) holder.mContent;
                if (mMarketSearchIntent != null) {
                    searchView.setVisibility(View.VISIBLE);
                    searchView.setContentDescription(mMarketSearchMessage);
                    searchView.setGravity(mApps.hasNoFilteredResults() ? Gravity.CENTER :
                            Gravity.START | Gravity.CENTER_VERTICAL);
                    searchView.setText(mMarketSearchMessage);
                } else {
                    searchView.setVisibility(View.GONE);
                }
                break;
        }
    }

    @Override
    public int getItemCount() {
        return mApps.getAdapterItems().size();
    }

    @Override
    public int getItemViewType(int position) {
        AlphabeticalAppsList.AdapterItem item = mApps.getAdapterItems().get(position);
        return item.viewType;
    }

    /**
     * Creates a new market search intent.
     */
    private Intent createMarketSearchIntent(String query) {
        Uri marketSearchUri = Uri.parse("market://search")
                .buildUpon()
                .appendQueryParameter("q", query)
                .build();
        Intent marketSearchIntent = new Intent(Intent.ACTION_VIEW);
        marketSearchIntent.setData(marketSearchUri);
        return marketSearchIntent;
    }
}