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
|
/*******************************************************************************
* Copyright (c) 2004, 2012 Tasktop Technologies 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:
* Tasktop Technologies - initial API and implementation
* Xiaoyang Guan - browser preview
*******************************************************************************/
package org.eclipse.mylyn.internal.tasks.ui.editors;
import org.eclipse.core.runtime.Assert;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.core.runtime.jobs.IJobChangeEvent;
import org.eclipse.core.runtime.jobs.Job;
import org.eclipse.core.runtime.jobs.JobChangeAdapter;
import org.eclipse.mylyn.commons.workbench.browser.BrowserUtil;
import org.eclipse.mylyn.internal.tasks.ui.TasksUiPlugin;
import org.eclipse.mylyn.internal.tasks.ui.util.TasksUiInternal;
import org.eclipse.mylyn.tasks.core.RepositoryStatus;
import org.eclipse.mylyn.tasks.core.TaskRepository;
import org.eclipse.mylyn.tasks.ui.editors.AbstractRenderingEngine;
import org.eclipse.swt.SWT;
import org.eclipse.swt.browser.Browser;
import org.eclipse.swt.browser.LocationAdapter;
import org.eclipse.swt.browser.LocationEvent;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.ui.forms.widgets.FormToolkit;
/**
* @author Steffen Pingel
* @author Xiaoyang Guan
*/
public class BrowserPreviewViewer {
private Browser browser;
private boolean ignoreLocationEvents;
private final AbstractRenderingEngine renderingEngine;
private final TaskRepository taskRepository;
public BrowserPreviewViewer(TaskRepository taskRepository, AbstractRenderingEngine renderingEngine) {
Assert.isNotNull(taskRepository);
Assert.isNotNull(renderingEngine);
this.taskRepository = taskRepository;
this.renderingEngine = renderingEngine;
}
public void createControl(Composite parent, FormToolkit toolkit) {
browser = new Browser(parent, SWT.NONE);
// intercept links to open tasks in rich editor and urls in separate browser
browser.addLocationListener(new LocationAdapter() {
@Override
public void changing(LocationEvent event) {
// ignore events that are caused by manually setting the contents of the browser
if (ignoreLocationEvents) {
return;
}
if (event.location != null && !event.location.startsWith("about")) { //$NON-NLS-1$
event.doit = false;
BrowserUtil.openUrl(event.location);
}
}
});
}
public Browser getControl() {
return browser;
}
private void previewWiki(final Browser browser, String sourceText) {
final class PreviewWikiJob extends Job {
private String htmlText;
private IStatus jobStatus;
private final String sourceText;
public PreviewWikiJob(String sourceText) {
super(Messages.BrowserPreviewViewer_Formatting_Wiki_Text);
if (sourceText == null) {
throw new IllegalArgumentException("source text must not be null"); //$NON-NLS-1$
}
this.sourceText = sourceText;
}
public String getHtmlText() {
return htmlText;
}
public IStatus getStatus() {
return jobStatus;
}
@Override
protected IStatus run(IProgressMonitor monitor) {
if (renderingEngine == null) {
jobStatus = new RepositoryStatus(taskRepository, IStatus.INFO, TasksUiPlugin.ID_PLUGIN,
RepositoryStatus.ERROR_INTERNAL,
Messages.BrowserPreviewViewer_The_repository_does_not_support_HTML_preview);
return Status.OK_STATUS;
}
jobStatus = Status.OK_STATUS;
try {
htmlText = renderingEngine.renderAsHtml(taskRepository, sourceText, monitor);
} catch (CoreException e) {
jobStatus = e.getStatus();
}
return Status.OK_STATUS;
}
}
final PreviewWikiJob job = new PreviewWikiJob(sourceText);
job.addJobChangeListener(new JobChangeAdapter() {
@Override
public void done(final IJobChangeEvent event) {
if (!browser.isDisposed()) {
if (job.getStatus().isOK()) {
browser.getDisplay().asyncExec(new Runnable() {
public void run() {
setText(browser, job.getHtmlText());
// TODO 3.5 error handling
//getAttributeEditorManager().setMessage(null, IMessageProvider.NONE);
}
});
} else {
browser.getDisplay().asyncExec(new Runnable() {
public void run() {
TasksUiInternal.displayStatus(Messages.BrowserPreviewViewer_Error, job.getStatus());
// TODO 3.5 error handling
//getAttributeEditorManager().setMessage(job.getStatus().getMessage(), IMessageProvider.ERROR);
}
});
}
}
super.done(event);
}
});
job.setUser(true);
job.schedule();
}
private void setText(Browser browser, String html) {
try {
ignoreLocationEvents = true;
browser.setText((html != null) ? html : ""); //$NON-NLS-1$
} finally {
ignoreLocationEvents = false;
}
}
public void update(String value) {
setText(browser, Messages.BrowserPreviewViewer_Loading_preview_);
previewWiki(browser, value);
}
}
|
