blob: 88e4825f66cc3b755b7034baae63d5c20db2c817 (
plain) (
blame)
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
|
/*******************************************************************************
* Copyright (c) 2016 Red Hat Inc. and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* - Mickael Istria (Red Hat Inc.)
*******************************************************************************/
package org.eclipse.ui.internal.genericeditor;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IConfigurationElement;
import org.eclipse.core.runtime.IRegistryChangeEvent;
import org.eclipse.core.runtime.IRegistryChangeListener;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Platform;
import org.eclipse.core.runtime.Status;
import org.eclipse.core.runtime.content.IContentType;
import org.eclipse.jface.preference.IPreferenceStore;
import org.eclipse.jface.text.ITextHover;
import org.eclipse.jface.text.source.ISourceViewer;
/**
* Text hover registry that manages the detectors
* contributed by the <code>org.eclipse.ui.workbench.texteditor.hoverProvider</code> extension point for
* targets contributed by the <code>org.eclipse.ui.workbench.texteditor.hyperlinkDetectorTargets</code> extension point.
*
* @since 1.0
*/
public final class TextHoverRegistry {
private static final String EXTENSION_POINT_ID = GenericEditorPlugin.BUNDLE_ID + ".hoverProviders"; //$NON-NLS-1$
private Map<IConfigurationElement, TextHoverExtension> extensions = new HashMap<>();
private boolean outOfSync = true;
private static class TextHoverExtension {
private static final String CONTENT_TYPE_ATTRIBUTE = "contentType"; //$NON-NLS-1$
private static final String CLASS_ATTRIBUTE = "class"; //$NON-NLS-1$
private IConfigurationElement extension;
private IContentType targetContentType;
private ITextHover delegate;
public TextHoverExtension(IConfigurationElement extension) throws Exception {
this.extension = extension;
this.targetContentType = Platform.getContentTypeManager().getContentType(extension.getAttribute(CONTENT_TYPE_ATTRIBUTE));
}
private ITextHover getDelegate() {
if (this.delegate == null) {
try {
this.delegate = (ITextHover) extension.createExecutableExtension(CLASS_ATTRIBUTE);
} catch (CoreException e) {
e.printStackTrace();
}
}
return delegate;
}
}
public TextHoverRegistry(IPreferenceStore preferenceStore) {
Platform.getExtensionRegistry().addRegistryChangeListener(new IRegistryChangeListener() {
@Override
public void registryChanged(IRegistryChangeEvent event) {
outOfSync = true;
}
}, EXTENSION_POINT_ID);
}
public ITextHover getAvailableHover(ISourceViewer sourceViewer, Set<IContentType> contentTypes) {
if (this.outOfSync) {
sync();
}
// TODO rather that returning the 1st active hover, consider
// supporting compound/aggregated hovers.
for (TextHoverExtension ext : this.extensions.values()) {
if (contentTypes.contains(ext.targetContentType)) {
return ext.getDelegate();
}
}
return null;
}
private void sync() {
Set<IConfigurationElement> toRemoveExtensions = new HashSet<>(this.extensions.keySet());
for (IConfigurationElement extension : Platform.getExtensionRegistry().getConfigurationElementsFor(EXTENSION_POINT_ID)) {
toRemoveExtensions.remove(extension);
if (!this.extensions.containsKey(extension)) {
try {
this.extensions.put(extension, new TextHoverExtension(extension));
} catch (Exception ex) {
GenericEditorPlugin.getDefault().getLog().log(new Status(IStatus.ERROR, GenericEditorPlugin.BUNDLE_ID, ex.getMessage(), ex));
}
}
}
for (IConfigurationElement toRemove : toRemoveExtensions) {
this.extensions.remove(toRemove);
}
this.outOfSync = false;
}
}
|
