CustomBar.java revision b1484862e2367d87d3ccbd0fd0a6d2598ed5918a 
1/*
2 * Copyright (C) 2011 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.android.layoutlib.bridge.bars;
18
19import com.android.ide.common.rendering.api.RenderResources;
20import com.android.ide.common.rendering.api.ResourceValue;
21import com.android.ide.common.rendering.api.StyleResourceValue;
22import com.android.layoutlib.bridge.Bridge;
23import com.android.layoutlib.bridge.android.BridgeContext;
24import com.android.layoutlib.bridge.android.BridgeXmlBlockParser;
25import com.android.layoutlib.bridge.impl.ParserFactory;
26import com.android.layoutlib.bridge.impl.ResourceHelper;
27import com.android.resources.Density;
28import com.android.resources.LayoutDirection;
29import com.android.resources.ResourceType;
30
31import org.xmlpull.v1.XmlPullParser;
32import org.xmlpull.v1.XmlPullParserException;
33
34import android.annotation.NonNull;
35import android.content.Context;
36import android.content.res.ColorStateList;
37import android.graphics.Bitmap;
38import android.graphics.Bitmap_Delegate;
39import android.graphics.drawable.BitmapDrawable;
40import android.graphics.drawable.Drawable;
41import android.util.TypedValue;
42import android.view.Gravity;
43import android.view.LayoutInflater;
44import android.view.View;
45import android.widget.ImageView;
46import android.widget.LinearLayout;
47import android.widget.TextView;
48
49import java.io.IOException;
50import java.io.InputStream;
51
52import static android.os.Build.VERSION_CODES.LOLLIPOP;
53
54/**
55 * Base "bar" class for the window decor around the the edited layout.
56 * This is basically an horizontal layout that loads a given layout on creation (it is read
57 * through {@link Class#getResourceAsStream(String)}).
58 *
59 * The given layout should be a merge layout so that all the children belong to this class directly.
60 *
61 * It also provides a few utility methods to configure the content of the layout.
62 */
63abstract class CustomBar extends LinearLayout {
64
65
66    private final int mSimulatedPlatformVersion;
67
68    protected abstract TextView getStyleableTextView();
69
70    protected CustomBar(BridgeContext context, int orientation, String layoutPath,
71            String name, int simulatedPlatformVersion) {
72        super(context);
73        mSimulatedPlatformVersion = simulatedPlatformVersion;
74        setOrientation(orientation);
75        if (orientation == LinearLayout.HORIZONTAL) {
76            setGravity(Gravity.CENTER_VERTICAL);
77        } else {
78            setGravity(Gravity.CENTER_HORIZONTAL);
79        }
80
81        LayoutInflater inflater = (LayoutInflater) getContext().getSystemService(
82                Context.LAYOUT_INFLATER_SERVICE);
83
84        XmlPullParser parser;
85        try {
86            parser = ParserFactory.create(getClass().getResourceAsStream(layoutPath), name);
87        } catch (XmlPullParserException e) {
88            // Should not happen as the resource is bundled with the jar, and  ParserFactory should
89            // have been initialized.
90            throw new AssertionError(e);
91        }
92
93        BridgeXmlBlockParser bridgeParser = new BridgeXmlBlockParser(parser, context, false);
94
95        try {
96            inflater.inflate(bridgeParser, this, true);
97        } finally {
98            bridgeParser.ensurePopped();
99        }
100    }
101
102    protected void loadIcon(int index, String iconName, Density density) {
103        loadIcon(index, iconName, density, false);
104    }
105
106    protected void loadIcon(int index, String iconName, Density density, boolean isRtl) {
107        View child = getChildAt(index);
108        if (child instanceof ImageView) {
109            ImageView imageView = (ImageView) child;
110
111            LayoutDirection dir = isRtl ? LayoutDirection.RTL : null;
112            IconLoader iconLoader = new IconLoader(iconName, density, mSimulatedPlatformVersion,
113                    dir);
114            InputStream stream = iconLoader.getIcon();
115
116            if (stream != null) {
117                density = iconLoader.getDensity();
118                String path = iconLoader.getPath();
119                // look for a cached bitmap
120                Bitmap bitmap = Bridge.getCachedBitmap(path, true /*isFramework*/);
121                if (bitmap == null) {
122                    try {
123                        bitmap = Bitmap_Delegate.createBitmap(stream, false /*isMutable*/, density);
124                        Bridge.setCachedBitmap(path, bitmap, true /*isFramework*/);
125                    } catch (IOException e) {
126                        return;
127                    }
128                }
129
130                if (bitmap != null) {
131                    BitmapDrawable drawable = new BitmapDrawable(getContext().getResources(),
132                            bitmap);
133                    imageView.setImageDrawable(drawable);
134                }
135            }
136        }
137    }
138
139    protected TextView setText(int index, String string, boolean reference) {
140        View child = getChildAt(index);
141        if (child instanceof TextView) {
142            TextView textView = (TextView) child;
143            setText(textView, string, reference);
144            return textView;
145        }
146
147        return null;
148    }
149
150    private void setText(TextView textView, String string, boolean reference) {
151        if (reference) {
152            ResourceValue value = getResourceValue(string);
153            if (value != null) {
154                string = value.getValue();
155            }
156        }
157        textView.setText(string);
158    }
159
160    protected void setStyle(String themeEntryName) {
161
162        BridgeContext bridgeContext = (BridgeContext) mContext;
163        RenderResources res = bridgeContext.getRenderResources();
164
165        ResourceValue value = res.findItemInTheme(themeEntryName, true /*isFrameworkAttr*/);
166        value = res.resolveResValue(value);
167
168        if (!(value instanceof StyleResourceValue)) {
169            return;
170        }
171
172        StyleResourceValue style = (StyleResourceValue) value;
173
174        // get the background
175        ResourceValue backgroundValue = res.findItemInStyle(style, "background",
176                true /*isFrameworkAttr*/);
177        backgroundValue = res.resolveResValue(backgroundValue);
178        if (backgroundValue != null) {
179            Drawable d = ResourceHelper.getDrawable(backgroundValue, bridgeContext);
180            if (d != null) {
181                setBackground(d);
182            }
183        }
184
185        TextView textView = getStyleableTextView();
186        if (textView != null) {
187            // get the text style
188            ResourceValue textStyleValue = res.findItemInStyle(style, "titleTextStyle",
189                    true /*isFrameworkAttr*/);
190            textStyleValue = res.resolveResValue(textStyleValue);
191            if (textStyleValue instanceof StyleResourceValue) {
192                StyleResourceValue textStyle = (StyleResourceValue) textStyleValue;
193
194                ResourceValue textSize = res.findItemInStyle(textStyle, "textSize",
195                        true /*isFrameworkAttr*/);
196                textSize = res.resolveResValue(textSize);
197
198                if (textSize != null) {
199                    TypedValue out = new TypedValue();
200                    if (ResourceHelper.parseFloatAttribute("textSize", textSize.getValue(), out,
201                            true /*requireUnit*/)) {
202                        textView.setTextSize(TypedValue.COMPLEX_UNIT_PX,
203                                out.getDimension(bridgeContext.getResources().getDisplayMetrics()));
204                    }
205                }
206
207
208                ResourceValue textColor = res.findItemInStyle(textStyle, "textColor",
209                        true);
210                textColor = res.resolveResValue(textColor);
211                if (textColor != null) {
212                    ColorStateList stateList = ResourceHelper.getColorStateList(
213                            textColor, bridgeContext);
214                    if (stateList != null) {
215                        textView.setTextColor(stateList);
216                    }
217                }
218            }
219        }
220    }
221
222    /**
223     * Given a theme attribute name, get the color referenced by it. The theme attribute may be
224     * used in a layout like "?attr/foo".
225     * <p/>
226     * Returns 0 if not found.
227     *
228     * @throws NumberFormatException if color resolved to an invalid string.
229     */
230    protected int getThemeAttrColor(@NonNull String attrName, boolean isFramework) {
231        if (!Config.isGreaterOrEqual(mSimulatedPlatformVersion, LOLLIPOP)) {
232            return 0;
233        }
234        assert mContext instanceof BridgeContext;
235        BridgeContext context = ((BridgeContext) mContext);
236        RenderResources renderResources = context.getRenderResources();
237        // From ?attr/foo to @color/bar. This is most likely an ItemResourceValue.
238        ResourceValue resource = renderResources.findItemInTheme(attrName, isFramework);
239        if (resource != null) {
240            // Form @color/bar to the #AARRGGBB
241            resource = renderResources.resolveResValue(resource);
242        }
243        if (resource != null && ResourceType.COLOR.equals(resource.getResourceType())) {
244            return ResourceHelper.getColor(resource.getValue());
245        }
246        return 0;
247    }
248
249    private ResourceValue getResourceValue(String reference) {
250        BridgeContext bridgeContext = (BridgeContext) mContext;
251        RenderResources res = bridgeContext.getRenderResources();
252
253        // find the resource
254        ResourceValue value = res.findResValue(reference, false);
255
256        // resolve it if needed
257        return res.resolveResValue(value);
258    }
259}
260