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1 // Copyright 2016 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 import android.view.View; | |
14 | |
15 import java.util.List; | |
16 | |
17 /** | |
18 * Holds onto a View that displays information about a picker bitmap. | |
19 */ | |
20 public class PickerBitmapViewHolder extends ViewHolder { | |
21 // Our parent category. | |
22 private PickerCategoryView mCategoryView; | |
23 | |
24 // The bitmap view we are holding on to. | |
25 private final PickerBitmapView mItemView; | |
26 | |
27 // The request we are showing the bitmap for. | |
28 private PickerBitmap mRequest; | |
29 | |
30 /** | |
31 * The PickerBitmapViewHolder. | |
32 * @param itemView The PickerBitmap view for showing the image. | |
33 */ | |
34 public PickerBitmapViewHolder(View itemView) { | |
35 super(itemView); | |
36 | |
37 assert itemView instanceof PickerBitmapView; | |
38 mItemView = (PickerBitmapView) itemView; | |
39 } | |
40 | |
41 public void imageDecodedCallback(String filePath, Bitmap bitmap) { | |
Theresa
2017/03/31 18:05:56
nit: JavaDoc
Finnur
2017/04/03 17:30:30
Done.
| |
42 if (bitmap == null || bitmap.getWidth() == 0 || bitmap.getHeight() == 0) { | |
43 return; | |
44 } | |
45 | |
46 if (!TextUtils.equals(mRequest.getFilePath(), filePath)) { | |
47 return; | |
48 } | |
49 | |
50 mItemView.setThumbnailBitmap(bitmap); | |
51 } | |
52 | |
53 /** | |
54 * Display a single item from |position| in the PickerCategoryView. | |
55 * @param categoryView The PickerCategoryView to use to fetch the image. | |
56 * @param position The position of the item to fetch. | |
57 */ | |
58 public void displayItem(PickerCategoryView categoryView, int position) { | |
59 mCategoryView = categoryView; | |
60 | |
61 List<PickerBitmap> pickerBitmaps = mCategoryView.getPickerBitmaps(); | |
62 mRequest = pickerBitmaps.get(position); | |
63 | |
64 String filePath = mRequest.getFilePath(); | |
65 if (mRequest.type() == PickerBitmap.TileTypes.CAMERA | |
66 || mRequest.type() == PickerBitmap.TileTypes.GALLERY) { | |
67 mItemView.initialize(mRequest, null, false); | |
68 mItemView.initializeSpecialTile(); | |
Theresa
2017/03/31 18:05:56
Can PickerBitmapView call initializeSpecialTile di
Finnur
2017/04/03 17:30:29
When I went to make that change I realized initial
| |
69 return; | |
70 } | |
71 | |
72 // TODO(finnur): Use cached image, if available. | |
73 | |
74 // TODO(finnur): Use decoder instead. | |
75 int size = mCategoryView.getImageSize(); | |
76 imageDecodedCallback(mRequest.getFilePath(), createPlaceholderBitmap(siz e, size)); | |
77 } | |
78 | |
79 /** | |
80 * Creates a placeholder bitmap. | |
81 * @param width The requested width of the resulting bitmap. | |
82 * @param height The requested height of the resulting bitmap. | |
83 * @return Placeholder bitmap. | |
84 */ | |
85 // TODO(finnur): Remove once the decoder is in place. | |
86 private Bitmap createPlaceholderBitmap(int width, int height) { | |
87 Bitmap placeholder = Bitmap.createBitmap(width, height, Bitmap.Config.AR GB_8888); | |
88 Canvas canvas = new Canvas(placeholder); | |
89 Paint paint = new Paint(); | |
90 paint.setColor(Color.GRAY); | |
91 canvas.drawRect(0, 0, (float) width, (float) height, paint); | |
92 return placeholder; | |
93 } | |
94 | |
95 /** | |
96 * Returns the file path of the current request. | |
97 */ | |
98 public String getFilePath() { | |
99 return mRequest == null ? null : mRequest.getFilePath(); | |
100 } | |
101 } | |
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