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
|
// Copyright (C) 2009 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 com.google.gwtexpui.css.rebind;
import com.google.gwt.core.ext.LinkerContext;
import com.google.gwt.core.ext.TreeLogger;
import com.google.gwt.core.ext.UnableToCompleteException;
import com.google.gwt.core.ext.linker.AbstractLinker;
import com.google.gwt.core.ext.linker.Artifact;
import com.google.gwt.core.ext.linker.ArtifactSet;
import com.google.gwt.core.ext.linker.LinkerOrder;
import com.google.gwt.core.ext.linker.PublicResource;
import com.google.gwt.core.ext.linker.impl.StandardLinkerContext;
import com.google.gwt.core.ext.linker.impl.StandardStylesheetReference;
import com.google.gwt.dev.util.Util;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.HashMap;
@LinkerOrder(LinkerOrder.Order.PRE)
public class CssLinker extends AbstractLinker {
@Override
public String getDescription() {
return "CssLinker";
}
@Override
public ArtifactSet link(final TreeLogger logger, LinkerContext context, ArtifactSet artifacts)
throws UnableToCompleteException {
final ArtifactSet returnTo = new ArtifactSet();
int index = 0;
final HashMap<String, PublicResource> css = new HashMap<>();
for (StandardStylesheetReference ssr :
artifacts.<StandardStylesheetReference>find(StandardStylesheetReference.class)) {
css.put(ssr.getSrc(), null);
}
for (PublicResource pr : artifacts.<PublicResource>find(PublicResource.class)) {
if (css.containsKey(pr.getPartialPath())) {
css.put(pr.getPartialPath(), new CssPubRsrc(name(logger, pr), pr));
}
}
for (Artifact<?> a : artifacts) {
if (a instanceof PublicResource) {
final PublicResource r = (PublicResource) a;
if (css.containsKey(r.getPartialPath())) {
a = css.get(r.getPartialPath());
}
} else if (a instanceof StandardStylesheetReference) {
final StandardStylesheetReference r = (StandardStylesheetReference) a;
final PublicResource p = css.get(r.getSrc());
a = new StandardStylesheetReference(p.getPartialPath(), index);
}
returnTo.add(a);
index++;
}
return returnTo;
}
private String name(TreeLogger logger, PublicResource r) throws UnableToCompleteException {
byte[] out;
try (ByteArrayOutputStream tmp = new ByteArrayOutputStream();
InputStream in = r.getContents(logger)) {
final byte[] buf = new byte[2048];
int n;
while ((n = in.read(buf)) >= 0) {
tmp.write(buf, 0, n);
}
out = tmp.toByteArray();
} catch (IOException e) {
final UnableToCompleteException ute = new UnableToCompleteException();
ute.initCause(e);
throw ute;
}
String base = r.getPartialPath();
final int s = base.lastIndexOf('/');
if (0 < s) {
base = base.substring(0, s + 1);
} else {
base = "";
}
return base + Util.computeStrongName(out) + ".cache.css";
}
private static class CssPubRsrc extends PublicResource {
private static final long serialVersionUID = 1L;
private final PublicResource src;
CssPubRsrc(String partialPath, PublicResource r) {
super(StandardLinkerContext.class, partialPath);
src = r;
}
@Override
public InputStream getContents(TreeLogger logger) throws UnableToCompleteException {
return src.getContents(logger);
}
@Override
public long getLastModified() {
return src.getLastModified();
}
}
}
|
