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1 // Copyright 2015 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.ntp; | |
6 | |
7 import android.content.Context; | |
8 import android.content.res.Resources; | |
9 import android.content.res.TypedArray; | |
10 import android.graphics.Color; | |
11 import android.graphics.Rect; | |
12 import android.graphics.drawable.BitmapDrawable; | |
13 import android.graphics.drawable.Drawable; | |
14 import android.os.AsyncTask; | |
15 import android.support.v4.graphics.drawable.RoundedBitmapDrawable; | |
16 import android.support.v4.graphics.drawable.RoundedBitmapDrawableFactory; | |
17 import android.support.v7.widget.AppCompatTextView; | |
18 import android.text.TextUtils; | |
19 import android.util.LruCache; | |
20 import android.util.TypedValue; | |
21 import android.view.Gravity; | |
22 import android.view.View; | |
23 import android.view.View.OnClickListener; | |
24 | |
25 import org.chromium.base.Log; | |
26 import org.chromium.chrome.R; | |
27 import org.chromium.chrome.browser.ntp.InterestsPage.InterestsClickListener; | |
28 import org.chromium.chrome.browser.ntp.InterestsService.Interest; | |
29 import org.chromium.chrome.browser.widget.RoundedIconGenerator; | |
30 | |
31 import java.io.IOException; | |
32 import java.io.InputStream; | |
33 import java.net.URL; | |
34 | |
35 /** | |
36 * Displays the interest name along with an image of it. This item can be clicke d. | |
37 */ | |
38 class InterestsItemView extends AppCompatTextView implements OnClickListener { | |
39 | |
40 private static final String TAG = "interests_item_view"; | |
knn
2015/12/02 14:18:59
CamelCase
PEConn
2015/12/08 17:27:49
Done.
| |
41 | |
42 /** | |
43 * Drawing-related values that can be shared between instances of InterestsI temView. | |
44 */ | |
45 static final class DrawingData { | |
46 | |
47 private final int mPadding; | |
48 private final int mMinHeight; | |
49 private final int mImageSize; | |
50 private final int mTextSize; | |
51 private final int mImageTextSize; | |
52 | |
53 /** | |
54 * Initialize shared values used for drawing the image. | |
55 * | |
56 * @param context The view context in which the InterestsItemView will b e drawn. | |
57 */ | |
58 DrawingData(Context context) { | |
59 Resources res = context.getResources(); | |
60 mPadding = res.getDimensionPixelOffset(R.dimen.ntp_list_item_padding ); | |
61 mMinHeight = res.getDimensionPixelSize(R.dimen.ntp_interest_item_min _height); | |
62 mTextSize = res.getDimensionPixelSize(R.dimen.ntp_interest_item_text _size); | |
63 mImageSize = res.getDimensionPixelSize(R.dimen.ntp_interest_item_ima ge_size); | |
64 mImageTextSize = res.getDimensionPixelSize(R.dimen.ntp_interest_item _image_text_size); | |
65 } | |
66 } | |
67 | |
68 private Interest mInterest; | |
69 private DownloadImageTask mDownloadTask; | |
70 | |
71 private final Context mContext; | |
72 private final DrawingData mDrawingData; | |
73 private final LruCache<String, Drawable> mImageCache; | |
74 private final InterestsClickListener mListener; | |
75 private final RoundedIconGenerator mIconGenerator; | |
76 | |
77 /** | |
78 * @param context The view context in which this item will be shown. | |
79 * @param interest The interest to display. | |
80 * @param listener Callback object for when a view is pressed. | |
81 * @param imageCache A cache to store downloaded images. | |
82 * @param drawingData Information about the view size. | |
83 */ | |
84 InterestsItemView(Context context, Interest interest, InterestsClickListener listener, | |
85 LruCache<String, Drawable> imageCache, DrawingData drawingData) { | |
86 super(context); | |
87 | |
88 mContext = context; | |
89 mListener = listener; | |
90 mImageCache = imageCache; | |
91 mDrawingData = drawingData; | |
92 | |
93 setTextSize(TypedValue.COMPLEX_UNIT_PX, mDrawingData.mTextSize); | |
94 setMinimumHeight(mDrawingData.mMinHeight); | |
95 setGravity(Gravity.CENTER); | |
96 setTextAlignment(View.TEXT_ALIGNMENT_CENTER); | |
97 | |
98 mIconGenerator = new RoundedIconGenerator( | |
99 mDrawingData.mImageSize, | |
100 mDrawingData.mImageSize, | |
101 mDrawingData.mImageSize / 2, | |
102 Color.GRAY, | |
103 mDrawingData.mImageTextSize); | |
104 | |
105 setOnClickListener(this); | |
106 | |
107 reset(interest); | |
108 } | |
109 | |
110 /** | |
111 * Resets the view contents so that it can be reused in the grid view. | |
112 * | |
113 * @param interest The interest to display. | |
114 */ | |
115 public void reset(Interest interest) { | |
116 // Reset Drawable state so ripples don't continue when the View is reuse d. | |
117 jumpDrawablesToCurrentState(); | |
118 | |
119 // Exit early if this View is already displaying the Interest given. | |
120 if (mInterest != null | |
121 && TextUtils.equals(interest.getName(), mInterest.getName()) | |
122 && TextUtils.equals(interest.getImageUrl(), mInterest.getImageUr l())) { | |
123 mInterest = interest; | |
124 return; | |
125 } | |
126 | |
127 mInterest = interest; | |
128 | |
129 setText(mInterest.getName()); | |
130 | |
131 Drawable image = mImageCache.get(mInterest.getImageUrl()); | |
132 if (image == null) { | |
133 // Cache miss, download the image and use a temporary in the meantim e. | |
Bernhard Bauer
2015/12/02 14:09:47
Hm... if we are called for the same interest sever
Bernhard Bauer
2015/12/02 14:10:39
(I suspect this will eventually boil down to somet
PEConn
2015/12/08 17:27:49
Done.
| |
134 mDownloadTask = new DownloadImageTask(mInterest.getImageUrl()); | |
135 mDownloadTask.execute(); | |
136 | |
137 mIconGenerator.setBackgroundColor(getTileColor(mInterest.getName())) ; | |
138 image = new BitmapDrawable(mContext.getResources(), | |
139 mIconGenerator.generateIconForText(mInter est.getName())); | |
140 } | |
141 setImage(image); | |
142 } | |
143 | |
144 /** | |
145 * @return The image URL for the interest. | |
146 */ | |
147 public String getImageUrl() { | |
148 return mInterest.getImageUrl(); | |
149 } | |
150 | |
151 /** | |
152 * @return The name of the interest. | |
153 */ | |
154 public String getName() { | |
155 return mInterest.getName(); | |
156 } | |
157 | |
158 private void setImage(Drawable image) { | |
159 image.setBounds(new Rect(0, 0, mDrawingData.mImageSize, mDrawingData.mIm ageSize)); | |
160 setCompoundDrawables(null, image, null, null); | |
161 } | |
162 | |
163 private int getTileColor(String str) { | |
164 // Rough copy of LetterTileDrawable.pickColor. | |
165 // TODO(peconn): Move this to a more general class. | |
166 TypedArray colors = mContext.getResources().obtainTypedArray(R.array.let ter_tile_colors); | |
167 return colors.getColor(Math.abs(str.hashCode() % colors.length()), Color .DKGRAY); | |
168 } | |
169 | |
170 @Override | |
171 public void onClick(View v) { | |
172 mListener.onInterestClicked(getName()); | |
173 } | |
174 | |
175 private void onImageDownloaded(Drawable image, String url) { | |
176 if (image == null) { | |
177 return; | |
178 } | |
179 | |
180 mImageCache.put(url, image); | |
181 | |
182 // If the Interest this View is displaying has changed while downloading , do not update | |
183 // the image. | |
184 if (url == mInterest.getImageUrl()) { | |
185 setImage(image); | |
186 } | |
187 } | |
188 | |
189 private class DownloadImageTask extends AsyncTask<Void, Void, Drawable> { | |
190 | |
191 private final String mUrl; | |
192 | |
193 public DownloadImageTask(String url) { | |
194 mUrl = url; | |
195 } | |
196 | |
197 @Override | |
198 protected Drawable doInBackground(Void... voids) { | |
199 // This is run on a background thread. | |
200 try { | |
201 // TODO(peconn): Replace this with something from the C++ Chrome stack. | |
202 URL imageUrl = new URL(mUrl); | |
203 InputStream in = imageUrl.openStream(); | |
204 RoundedBitmapDrawable img = | |
205 RoundedBitmapDrawableFactory.create(getResources(), in); | |
206 | |
207 // TODO(peconn): Modify image so it does not get stretched. | |
208 img.setCircular(true); | |
209 return img; | |
210 } catch (IOException e) { | |
211 Log.e(TAG, "Error downloading image: " + e.toString()); | |
212 } | |
213 return null; | |
214 } | |
215 | |
216 @Override | |
217 protected void onPostExecute(Drawable image) { | |
218 // This is run on the main thread. | |
219 onImageDownloaded(image, mUrl); | |
220 } | |
221 } | |
222 } | |
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