1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
|
/*
* Copyright (C) 2011 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package android.view;
import com.android.tools.layoutlib.annotations.LayoutlibDelegate;
import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlPullParserException;
import android.content.res.TypedArray;
import android.content.res.XmlResourceParser;
import android.util.AttributeSet;
import android.util.Xml;
import java.io.IOException;
/**
* Delegate used to provide new implementation of a select few methods of {@link LayoutInflater}
*
* Through the layoutlib_create tool, the original methods of LayoutInflater have been replaced
* by calls to methods of the same name in this delegate class.
*
*/
public class LayoutInflater_Delegate {
private static final String TAG_MERGE = "merge";
public static boolean sIsInInclude = false;
/**
* Recursive method used to descend down the xml hierarchy and instantiate
* views, instantiate their children, and then call onFinishInflate().
*
* This implementation just records the merge status before calling the default implementation.
*/
@LayoutlibDelegate
/*package*/ static void rInflate(LayoutInflater thisInflater,
XmlPullParser parser, View parent, final AttributeSet attrs,
boolean finishInflate) throws XmlPullParserException, IOException {
if (finishInflate == false) {
// this is a merge rInflate!
if (thisInflater instanceof BridgeInflater) {
((BridgeInflater) thisInflater).setIsInMerge(true);
}
}
// ---- START DEFAULT IMPLEMENTATION.
thisInflater.rInflate_Original(parser, parent, attrs, finishInflate);
// ---- END DEFAULT IMPLEMENTATION.
if (finishInflate == false) {
// this is a merge rInflate!
if (thisInflater instanceof BridgeInflater) {
((BridgeInflater) thisInflater).setIsInMerge(false);
}
}
}
@LayoutlibDelegate
public static void parseInclude(
LayoutInflater thisInflater,
XmlPullParser parser, View parent, AttributeSet attrs)
throws XmlPullParserException, IOException {
int type;
if (parent instanceof ViewGroup) {
final int layout = attrs.getAttributeResourceValue(null, "layout", 0);
if (layout == 0) {
final String value = attrs.getAttributeValue(null, "layout");
if (value == null) {
throw new InflateException("You must specifiy a layout in the"
+ " include tag: <include layout=\"@layout/layoutID\" />");
} else {
throw new InflateException("You must specifiy a valid layout "
+ "reference. The layout ID " + value + " is not valid.");
}
} else {
final XmlResourceParser childParser =
thisInflater.getContext().getResources().getLayout(layout);
try {
final AttributeSet childAttrs = Xml.asAttributeSet(childParser);
while ((type = childParser.next()) != XmlPullParser.START_TAG &&
type != XmlPullParser.END_DOCUMENT) {
// Empty.
}
if (type != XmlPullParser.START_TAG) {
throw new InflateException(childParser.getPositionDescription() +
": No start tag found!");
}
final String childName = childParser.getName();
if (TAG_MERGE.equals(childName)) {
// Inflate all children.
thisInflater.rInflate(childParser, parent, childAttrs, false);
} else {
final View view = thisInflater.createViewFromTag(parent, childName, childAttrs);
final ViewGroup group = (ViewGroup) parent;
// We try to load the layout params set in the <include /> tag. If
// they don't exist, we will rely on the layout params set in the
// included XML file.
// During a layoutparams generation, a runtime exception is thrown
// if either layout_width or layout_height is missing. We catch
// this exception and set localParams accordingly: true means we
// successfully loaded layout params from the <include /> tag,
// false means we need to rely on the included layout params.
ViewGroup.LayoutParams params = null;
try {
// ---- START CHANGES
sIsInInclude = true;
// ---- END CHANGES
params = group.generateLayoutParams(attrs);
} catch (RuntimeException e) {
// ---- START CHANGES
sIsInInclude = false;
// ---- END CHANGES
params = group.generateLayoutParams(childAttrs);
} finally {
// ---- START CHANGES
sIsInInclude = false;
// ---- END CHANGES
if (params != null) {
view.setLayoutParams(params);
}
}
// Inflate all children.
thisInflater.rInflate(childParser, view, childAttrs, true);
// Attempt to override the included layout's android:id with the
// one set on the <include /> tag itself.
TypedArray a = thisInflater.mContext.obtainStyledAttributes(attrs,
com.android.internal.R.styleable.View, 0, 0);
int id = a.getResourceId(com.android.internal.R.styleable.View_id, View.NO_ID);
// While we're at it, let's try to override android:visibility.
int visibility = a.getInt(com.android.internal.R.styleable.View_visibility, -1);
a.recycle();
if (id != View.NO_ID) {
view.setId(id);
}
switch (visibility) {
case 0:
view.setVisibility(View.VISIBLE);
break;
case 1:
view.setVisibility(View.INVISIBLE);
break;
case 2:
view.setVisibility(View.GONE);
break;
}
group.addView(view);
}
} finally {
childParser.close();
}
}
} else {
throw new InflateException("<include /> can only be used inside of a ViewGroup");
}
final int currentDepth = parser.getDepth();
while (((type = parser.next()) != XmlPullParser.END_TAG ||
parser.getDepth() > currentDepth) && type != XmlPullParser.END_DOCUMENT) {
// Empty
}
}
}
|
