blob: ff7d5c5f5659fb604d436d51c78212c3c567bdc5 (
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
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
|
/*******************************************************************************
* Copyright (c) 2002, 2006 QNX Software Systems 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:
* QNX Software Systems - Initial API and implementation
*******************************************************************************/
package org.eclipse.cdt.internal.ui.text.c.hover;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import org.eclipse.cdt.ui.CUIPlugin;
import org.eclipse.cdt.ui.PreferenceConstants;
import org.eclipse.cdt.ui.text.c.hover.ICEditorTextHover;
import org.eclipse.jface.text.IInformationControlCreator;
import org.eclipse.jface.text.IRegion;
import org.eclipse.jface.text.ITextHover;
import org.eclipse.jface.text.ITextHoverExtension;
import org.eclipse.jface.text.ITextViewer;
import org.eclipse.jface.text.information.IInformationProviderExtension2;
import org.eclipse.ui.IEditorPart;
/**
* BestMatchHover
*/
public class BestMatchHover extends AbstractCEditorTextHover implements ITextHoverExtension, IInformationProviderExtension2 {
private List fTextHoverSpecifications;
private List fInstantiatedTextHovers;
private ITextHover fBestHover;
public BestMatchHover() {
installTextHovers();
}
public BestMatchHover(IEditorPart editor) {
this();
setEditor(editor);
}
/**
* Installs all text hovers.
*/
private void installTextHovers() {
// initialize lists - indicates that the initialization happened
fTextHoverSpecifications= new ArrayList(2);
fInstantiatedTextHovers= new ArrayList(2);
// populate list
CEditorTextHoverDescriptor[] hoverDescs= CUIPlugin.getDefault().getCEditorTextHoverDescriptors();
for (int i= 0; i < hoverDescs.length; i++) {
// ensure that we don't add ourselves to the list
if (!PreferenceConstants.ID_BESTMATCH_HOVER.equals(hoverDescs[i].getId()))
fTextHoverSpecifications.add(hoverDescs[i]);
}
}
private void checkTextHovers() {
if (fTextHoverSpecifications.size() == 0)
return;
for (Iterator iterator= new ArrayList(fTextHoverSpecifications).iterator(); iterator.hasNext(); ) {
CEditorTextHoverDescriptor spec= (CEditorTextHoverDescriptor) iterator.next();
ICEditorTextHover hover= spec.createTextHover();
if (hover != null) {
hover.setEditor(getEditor());
addTextHover(hover);
fTextHoverSpecifications.remove(spec);
}
}
}
protected void addTextHover(ITextHover hover) {
if (!fInstantiatedTextHovers.contains(hover))
fInstantiatedTextHovers.add(hover);
}
/*
* @see ITextHover#getHoverInfo(ITextViewer, IRegion)
*/
public String getHoverInfo(ITextViewer textViewer, IRegion hoverRegion) {
checkTextHovers();
fBestHover= null;
if (fInstantiatedTextHovers == null)
return null;
for (Iterator iterator= fInstantiatedTextHovers.iterator(); iterator.hasNext(); ) {
ITextHover hover= (ITextHover)iterator.next();
String s= hover.getHoverInfo(textViewer, hoverRegion);
if (s != null && s.trim().length() > 0) {
fBestHover= hover;
return s;
}
}
return null;
}
/*
* @see org.eclipse.jface.text.ITextHoverExtension#getHoverControlCreator()
* @since 3.0
*/
public IInformationControlCreator getHoverControlCreator() {
if (fBestHover instanceof ITextHoverExtension)
return ((ITextHoverExtension)fBestHover).getHoverControlCreator();
return null;
}
/*
* @see org.eclipse.jface.text.information.IInformationProviderExtension2#getInformationPresenterControlCreator()
* @since 3.0
*/
public IInformationControlCreator getInformationPresenterControlCreator() {
if (fBestHover instanceof IInformationProviderExtension2)
return ((IInformationProviderExtension2)fBestHover).getInformationPresenterControlCreator();
return null;
}
}
|
