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/*******************************************************************************
* Copyright (c) 2011, 2017 Red Hat, Inc.
* 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:
* Red Hat Incorporated - initial API and implementation
*******************************************************************************/
package org.eclipse.linuxtools.internal.cdt.libhover.devhelp.preferences;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectOutputStream;
import java.util.Collection;
import org.eclipse.core.runtime.IPath;
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.jface.dialogs.IDialogConstants;
import org.eclipse.jface.preference.DirectoryFieldEditor;
import org.eclipse.jface.preference.FieldEditorPreferencePage;
import org.eclipse.jface.preference.IPreferenceStore;
import org.eclipse.linuxtools.cdt.libhover.LibHoverInfo;
import org.eclipse.linuxtools.cdt.libhover.LibhoverPlugin;
import org.eclipse.linuxtools.internal.cdt.libhover.LibHover;
import org.eclipse.linuxtools.internal.cdt.libhover.LibHoverLibrary;
import org.eclipse.linuxtools.internal.cdt.libhover.devhelp.DevHelpPlugin;
import org.eclipse.linuxtools.internal.cdt.libhover.devhelp.ParseDevHelp;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionListener;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Display;
import org.eclipse.ui.IWorkbench;
import org.eclipse.ui.IWorkbenchPreferencePage;
/**
* This class represents a preference page that
* is contributed to the Preferences dialog. By
* subclassing <samp>FieldEditorPreferencePage</samp>, we
* can use the field support built into JFace that allows
* us to create a page that is small and knows how to
* save, restore and apply itself.
* <p>
* This page is used to modify preferences only. They
* are stored in the preference store that belongs to
* the main plug-in class. That way, preferences can
* be accessed directly via the preference store.
*/
public class LibHoverPreferencePage extends FieldEditorPreferencePage implements
IWorkbenchPreferencePage {
private final static String DEVHELP_DIR = "Libhover.Devhelp.Directory"; //$NON-NLS-1$
private final static String GENERATE = "Libhover.Devhelp.Generate.lbl"; //$NON-NLS-1$
private final static String REGENERATE_MSG = "Libhover.Devhelp.Regenerate.msg"; //$NON-NLS-1$
private final static String TITLE = "Libhover.Devhelp.Preference.title"; //$NON-NLS-1$
private Button generateButton;
public LibHoverPreferencePage() {
super(GRID);
setPreferenceStore(DevHelpPlugin.getDefault().getPreferenceStore());
}
private static class DevhelpStringFieldEditor extends DirectoryFieldEditor {
public DevhelpStringFieldEditor(String name, String labelText,
Composite parent) {
super(name, labelText, parent);
setFilterPath(new File(DevHelpPlugin.getDefault().getPreferenceStore().getString(name)));
}
}
private synchronized void regenerate() {
generateButton.setEnabled(false);
Job k = new Job(LibHoverMessages.getString(REGENERATE_MSG)) {
@Override
protected IStatus run(IProgressMonitor monitor) {
IPreferenceStore ps = DevHelpPlugin.getDefault().getPreferenceStore();
ParseDevHelp.DevHelpParser p =
new ParseDevHelp.DevHelpParser(ps.getString(PreferenceConstants.DEVHELP_DIRECTORY));
LibHoverInfo hover = p.parse(monitor);
// Update the devhelp library info if it is on library list
Collection<LibHoverLibrary> libs = LibHover.getLibraries();
for (LibHoverLibrary l : libs) {
if (l.getName().equals("devhelp")) { //$NON-NLS-1$
l.setHoverinfo(hover);
break;
}
}
try {
// Now, output the LibHoverInfo for caching later
IPath location = LibhoverPlugin.getDefault().getStateLocation().append("C"); //$NON-NLS-1$
File ldir = new File(location.toOSString());
ldir.mkdir();
location = location.append("devhelp.libhover"); //$NON-NLS-1$
try (FileOutputStream f = new FileOutputStream(
location.toOSString());
ObjectOutputStream out = new ObjectOutputStream(f)) {
out.writeObject(hover);
}
monitor.done();
} catch(IOException e) {
monitor.done();
return new Status(IStatus.ERROR, DevHelpPlugin.PLUGIN_ID, e.getLocalizedMessage(), e);
}
return Status.OK_STATUS;
}
};
k.setUser(true);
k.addJobChangeListener(new JobChangeAdapter() {
@Override
public void done(IJobChangeEvent event) {
Display.getDefault().syncExec(() -> {
if (generateButton != null)
generateButton.setEnabled(true);
});
}
});
k.schedule();
}
@Override
protected void contributeButtons(Composite parent) {
((GridLayout) parent.getLayout()).numColumns++;
generateButton = new Button(parent, SWT.NONE);
generateButton.setFont(parent.getFont());
generateButton.setText(LibHoverMessages.getString(GENERATE));
generateButton.addSelectionListener(SelectionListener.widgetSelectedAdapter(e -> regenerate()));
generateButton.addDisposeListener(event -> generateButton = null);
GridData gd = new GridData();
gd.horizontalAlignment = GridData.FILL;
int widthHint = convertHorizontalDLUsToPixels(
IDialogConstants.BUTTON_WIDTH);
gd.widthHint = Math.max(widthHint, generateButton.computeSize(
SWT.DEFAULT, SWT.DEFAULT, true).x);
generateButton.setLayoutData(gd);
}
/**
* Creates the field editors. Field editors are abstractions of
* the common GUI blocks needed to manipulate various types
* of preferences. Each field editor knows how to save and
* restore itself.
*/
@Override
public void createFieldEditors() {
addField(
new LabelFieldEditor(
getFieldEditorParent(),
LibHoverMessages.getString(TITLE)));
addField(
new DevhelpStringFieldEditor(
PreferenceConstants.DEVHELP_DIRECTORY,
LibHoverMessages.getString(DEVHELP_DIR),
getFieldEditorParent()));
}
@Override
public void init(IWorkbench workbench) {
}
}
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