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1 // Copyright 2017 The Chromium Authors. All rights reserved. | 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 | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 package org.chromium.chrome.browser.photo_picker; | 5 package org.chromium.chrome.browser.photo_picker; |
6 | 6 |
7 import android.graphics.Bitmap; | 7 import android.graphics.Bitmap; |
8 import android.os.AsyncTask; | |
8 import android.support.v7.widget.RecyclerView.ViewHolder; | 9 import android.support.v7.widget.RecyclerView.ViewHolder; |
9 import android.text.TextUtils; | 10 import android.text.TextUtils; |
10 | 11 |
11 import java.util.List; | 12 import java.util.List; |
12 | 13 |
13 /** | 14 /** |
14 * Holds on to a {@link PickerBitmapView} that displays information about a pick er bitmap. | 15 * Holds on to a {@link PickerBitmapView} that displays information about a pick er bitmap. |
15 */ | 16 */ |
16 public class PickerBitmapViewHolder | 17 public class PickerBitmapViewHolder |
17 extends ViewHolder implements DecoderServiceHost.ImageDecodedCallback { | 18 extends ViewHolder implements DecoderServiceHost.ImageDecodedCallback { |
19 // The size (in dp) of the low-res thumbnails. | |
20 private static final int GRAINY_THUMBNAIL_SIZE_DP = 12; | |
Theresa
2017/05/08 19:34:42
Nit: Put this in dimens.xml and use Resources.getD
Finnur
2017/05/09 11:53:56
Done.
| |
21 | |
18 // Our parent category. | 22 // Our parent category. |
19 private PickerCategoryView mCategoryView; | 23 private PickerCategoryView mCategoryView; |
20 | 24 |
21 // The bitmap view we are holding on to. | 25 // The bitmap view we are holding on to. |
22 private final PickerBitmapView mItemView; | 26 private final PickerBitmapView mItemView; |
23 | 27 |
28 // The screen density. | |
29 private final float mDensity; | |
30 | |
24 // The request we are showing the bitmap for. | 31 // The request we are showing the bitmap for. |
25 private PickerBitmap mBitmapDetails; | 32 private PickerBitmap mBitmapDetails; |
26 | 33 |
27 /** | 34 /** |
28 * The PickerBitmapViewHolder. | 35 * The PickerBitmapViewHolder. |
29 * @param itemView The {@link PickerBitmapView} view for showing the image. | 36 * @param itemView The {@link PickerBitmapView} view for showing the image. |
30 */ | 37 */ |
31 public PickerBitmapViewHolder(PickerBitmapView itemView) { | 38 public PickerBitmapViewHolder(PickerBitmapView itemView) { |
32 super(itemView); | 39 super(itemView); |
33 mItemView = itemView; | 40 mItemView = itemView; |
41 mDensity = itemView.getContext().getResources().getDisplayMetrics().dens ity; | |
34 } | 42 } |
35 | 43 |
36 // DecoderServiceHost.ImageDecodedCallback | 44 // DecoderServiceHost.ImageDecodedCallback |
37 | 45 |
38 @Override | 46 @Override |
39 public void imageDecodedCallback(String filePath, Bitmap bitmap) { | 47 public void imageDecodedCallback(String filePath, Bitmap bitmap) { |
40 if (bitmap == null || bitmap.getWidth() == 0 || bitmap.getHeight() == 0) { | 48 if (bitmap == null || bitmap.getWidth() == 0 || bitmap.getHeight() == 0) { |
41 return; | 49 return; |
42 } | 50 } |
43 | 51 |
52 if (mCategoryView.getHighResBitmaps().get(filePath) == null) { | |
53 mCategoryView.getHighResBitmaps().put(filePath, bitmap); | |
54 } | |
55 | |
56 if (mCategoryView.getLowResBitmaps().get(filePath) == null) { | |
57 new BitmapScalerTask(mCategoryView.getLowResBitmaps(), filePath, | |
58 (int) (GRAINY_THUMBNAIL_SIZE_DP * mDensity)) | |
59 .executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR, bitmap); | |
60 } | |
61 | |
44 if (!TextUtils.equals(mBitmapDetails.getFilePath(), filePath)) { | 62 if (!TextUtils.equals(mBitmapDetails.getFilePath(), filePath)) { |
45 return; | 63 return; |
46 } | 64 } |
47 | 65 |
48 mItemView.setThumbnailBitmap(bitmap); | 66 mItemView.setThumbnailBitmap(bitmap); |
49 } | 67 } |
50 | 68 |
51 /** | 69 /** |
52 * Display a single item from |position| in the PickerCategoryView. | 70 * Display a single item from |position| in the PickerCategoryView. |
53 * @param categoryView The PickerCategoryView to use to fetch the image. | 71 * @param categoryView The PickerCategoryView to use to fetch the image. |
54 * @param position The position of the item to fetch. | 72 * @param position The position of the item to fetch. |
55 */ | 73 */ |
56 public void displayItem(PickerCategoryView categoryView, int position) { | 74 public void displayItem(PickerCategoryView categoryView, int position) { |
57 mCategoryView = categoryView; | 75 mCategoryView = categoryView; |
58 | 76 |
59 List<PickerBitmap> pickerBitmaps = mCategoryView.getPickerBitmaps(); | 77 List<PickerBitmap> pickerBitmaps = mCategoryView.getPickerBitmaps(); |
60 mBitmapDetails = pickerBitmaps.get(position); | 78 mBitmapDetails = pickerBitmaps.get(position); |
61 | 79 |
62 if (mBitmapDetails.type() == PickerBitmap.CAMERA | 80 if (mBitmapDetails.type() == PickerBitmap.CAMERA |
63 || mBitmapDetails.type() == PickerBitmap.GALLERY) { | 81 || mBitmapDetails.type() == PickerBitmap.GALLERY) { |
64 mItemView.initialize(mBitmapDetails, null, false); | 82 mItemView.initialize(mBitmapDetails, null, false); |
65 return; | 83 return; |
66 } | 84 } |
67 | 85 |
68 // TODO(finnur): Use cached image, if available. | 86 String filePath = mBitmapDetails.getFilePath(); |
69 | 87 Bitmap original = mCategoryView.getHighResBitmaps().get(filePath); |
70 mItemView.initialize(mBitmapDetails, null, true); | 88 if (original != null) { |
89 mItemView.initialize(mBitmapDetails, original, false); | |
90 return; | |
91 } | |
71 | 92 |
72 int size = mCategoryView.getImageSize(); | 93 int size = mCategoryView.getImageSize(); |
73 mCategoryView.getDecoderServiceHost().decodeImage(mBitmapDetails.getFile Path(), size, this); | 94 Bitmap placeholder = mCategoryView.getLowResBitmaps().get(filePath); |
95 if (placeholder != null) { | |
96 // Scaling the image up takes between 3-4 ms on average (Nexus 6 pho ne debug build). | |
Theresa
2017/05/08 19:34:42
nit: This type of information is likely to get out
Finnur
2017/05/09 11:53:56
Done.
| |
97 placeholder = BitmapUtils.scale(placeholder, size, false); | |
98 mItemView.initialize(mBitmapDetails, placeholder, true); | |
99 } else { | |
100 mItemView.initialize(mBitmapDetails, null, true); | |
101 } | |
102 | |
103 mCategoryView.getDecoderServiceHost().decodeImage(filePath, size, this); | |
74 } | 104 } |
75 | 105 |
76 /** | 106 /** |
77 * Returns the file path of the current request. | 107 * Returns the file path of the current request. |
78 */ | 108 */ |
79 public String getFilePath() { | 109 public String getFilePath() { |
80 return mBitmapDetails == null ? null : mBitmapDetails.getFilePath(); | 110 return mBitmapDetails == null ? null : mBitmapDetails.getFilePath(); |
81 } | 111 } |
82 } | 112 } |
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