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1 // Copyright 2017 The Chromium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 package org.chromium.chrome.browser.photo_picker; | |
6 | |
7 import android.graphics.Bitmap; | |
8 import android.graphics.Canvas; | |
9 import android.graphics.Color; | |
10 import android.graphics.Paint; | |
11 import android.support.v7.widget.RecyclerView.ViewHolder; | |
12 import android.text.TextUtils; | |
13 | |
14 import java.util.List; | |
15 | |
16 /** | |
17 * Holds on to a {@link PickerBitmapView} that displays information about a pick er bitmap. | |
18 */ | |
19 public class PickerBitmapViewHolder extends ViewHolder { | |
20 // Our parent category. | |
21 private PickerCategoryView mCategoryView; | |
22 | |
23 // The bitmap view we are holding on to. | |
24 private final PickerBitmapView mItemView; | |
25 | |
26 // The request we are showing the bitmap for. | |
27 private PickerBitmap mBitmapDetails; | |
28 | |
29 /** | |
30 * The PickerBitmapViewHolder. | |
31 * @param itemView The {@link PickerBitmapView} view for showing the image. | |
32 */ | |
33 public PickerBitmapViewHolder(PickerBitmapView itemView) { | |
34 super(itemView); | |
35 mItemView = itemView; | |
36 } | |
37 | |
38 /** | |
39 * The notification handler for when an image has been decoded. | |
40 * @param filePath The file path for the newly decoded image. | |
41 * @param bitmap The results of the decoding (or placeholder image, if faile d). | |
42 */ | |
43 public void imageDecodedCallback(String filePath, Bitmap bitmap) { | |
44 if (bitmap == null || bitmap.getWidth() == 0 || bitmap.getHeight() == 0) { | |
45 return; | |
46 } | |
47 | |
48 if (!TextUtils.equals(mBitmapDetails.getFilePath(), filePath)) { | |
49 return; | |
50 } | |
51 | |
52 mItemView.setThumbnailBitmap(bitmap); | |
53 } | |
54 | |
55 /** | |
56 * Display a single item from |position| in the PickerCategoryView. | |
57 * @param categoryView The PickerCategoryView to use to fetch the image. | |
58 * @param position The position of the item to fetch. | |
59 */ | |
60 public void displayItem(PickerCategoryView categoryView, int position) { | |
61 mCategoryView = categoryView; | |
62 | |
63 List<PickerBitmap> pickerBitmaps = mCategoryView.getPickerBitmaps(); | |
64 mBitmapDetails = pickerBitmaps.get(position); | |
65 | |
66 String filePath = mBitmapDetails.getFilePath(); | |
Theresa
2017/04/06 15:15:29
nit: findbugs reported a deadstore for this variab
Finnur
2017/04/06 15:46:47
Done.
| |
67 if (mBitmapDetails.type() == PickerBitmap.TileTypes.CAMERA | |
68 || mBitmapDetails.type() == PickerBitmap.TileTypes.GALLERY) { | |
69 mItemView.initializeSpecialTile(mBitmapDetails); | |
70 return; | |
71 } | |
72 | |
73 // TODO(finnur): Use cached image, if available. | |
74 | |
75 // TODO(finnur): Use decoder instead. | |
76 int size = mCategoryView.getImageSize(); | |
77 imageDecodedCallback(mBitmapDetails.getFilePath(), createPlaceholderBitm ap(size, size)); | |
78 } | |
79 | |
80 /** | |
81 * Creates a placeholder bitmap. | |
82 * @param width The requested width of the resulting bitmap. | |
83 * @param height The requested height of the resulting bitmap. | |
84 * @return Placeholder bitmap. | |
85 */ | |
86 // TODO(finnur): Remove once the decoder is in place. | |
87 private Bitmap createPlaceholderBitmap(int width, int height) { | |
88 Bitmap placeholder = Bitmap.createBitmap(width, height, Bitmap.Config.AR GB_8888); | |
89 Canvas canvas = new Canvas(placeholder); | |
90 Paint paint = new Paint(); | |
91 paint.setColor(Color.GRAY); | |
92 canvas.drawRect(0, 0, (float) width, (float) height, paint); | |
93 return placeholder; | |
94 } | |
95 | |
96 /** | |
97 * Returns the file path of the current request. | |
98 */ | |
99 public String getFilePath() { | |
100 return mBitmapDetails == null ? null : mBitmapDetails.getFilePath(); | |
101 } | |
102 } | |
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