/*******************************************************************************
* Copyright (c) 2000, 2004 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Common Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/cpl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package net.sourceforge.phpdt.internal.ui.text.template.contentassist;
import java.util.ArrayList;
import net.sourceforge.phpdt.core.ICompilationUnit;
//incastrix
//import net.sourceforge.phpdt.internal.corext.Assert;
import org.eclipse.core.runtime.Assert;
import net.sourceforge.phpdt.internal.corext.template.php.CompilationUnitContext;
import net.sourceforge.phpdt.internal.corext.template.php.CompilationUnitContextType;
import net.sourceforge.phpdt.internal.ui.PHPUiImages;
import net.sourceforge.phpeclipse.PHPeclipsePlugin;
import org.eclipse.jface.text.BadLocationException;
import org.eclipse.jface.text.IDocument;
import org.eclipse.jface.text.IRegion;
import org.eclipse.jface.text.ITextViewer;
import org.eclipse.jface.text.Region;
import org.eclipse.jface.text.templates.GlobalTemplateVariables;
import org.eclipse.jface.text.templates.Template;
import org.eclipse.jface.text.templates.TemplateContextType;
import org.eclipse.swt.graphics.Point;
public class TemplateEngine {
private static final String $_LINE_SELECTION = "${" + GlobalTemplateVariables.LineSelection.NAME + "}"; //$NON-NLS-1$ //$NON-NLS-2$
private static final String $_WORD_SELECTION = "${" + GlobalTemplateVariables.WordSelection.NAME + "}"; //$NON-NLS-1$ //$NON-NLS-2$
/** The context type. */
private TemplateContextType fContextType;
/** The result proposals. */
private ArrayList fProposals = new ArrayList();
/**
* Creates the template engine for a particular context type. See
* TemplateContext
for supported context types.
*/
public TemplateEngine(TemplateContextType contextType) {
Assert.isNotNull(contextType);
fContextType = contextType;
}
/**
* Empties the collector.
*/
public void reset() {
fProposals.clear();
}
/**
* Returns the array of matching templates.
*/
public TemplateProposal[] getResults() {
return (TemplateProposal[]) fProposals
.toArray(new TemplateProposal[fProposals.size()]);
}
/**
* Inspects the context of the compilation unit around
* completionPosition
and feeds the collector with proposals.
*
* @param viewer
* the text viewer
* @param completionPosition
* the context position in the document of the text viewer
* @param compilationUnit
* the compilation unit (may be null
)
*/
public void complete(ITextViewer viewer, int completionPosition,
ICompilationUnit compilationUnit) {
IDocument document = viewer.getDocument();
if (!(fContextType instanceof CompilationUnitContextType))
return;
Point selection = viewer.getSelectedRange();
// remember selected text
String selectedText = null;
if (selection.y != 0) {
try {
selectedText = document.get(selection.x, selection.y);
} catch (BadLocationException e) {
}
}
CompilationUnitContext context = ((CompilationUnitContextType) fContextType)
.createContext(document, completionPosition, selection.y,
compilationUnit);
context.setVariable("selection", selectedText); //$NON-NLS-1$
int start = context.getStart();
int end = context.getEnd();
IRegion region = new Region(start, end - start);
Template[] templates = PHPeclipsePlugin.getDefault().getTemplateStore()
.getTemplates();
if (selection.y == 0) {
for (int i = 0; i != templates.length; i++)
if (context.canEvaluate(templates[i]))
fProposals.add(new TemplateProposal(templates[i], context,
region, PHPUiImages
.get(PHPUiImages.IMG_OBJS_TEMPLATE)));
} else {
if (context.getKey().length() == 0)
context.setForceEvaluation(true);
boolean multipleLinesSelected = areMultipleLinesSelected(viewer);
for (int i = 0; i != templates.length; i++) {
Template template = templates[i];
if (context.canEvaluate(template)
&& template.getContextTypeId().equals(
context.getContextType().getId())
&& (!multipleLinesSelected
&& template.getPattern().indexOf(
$_WORD_SELECTION) != -1 || (multipleLinesSelected && template
.getPattern().indexOf($_LINE_SELECTION) != -1))) {
fProposals.add(new TemplateProposal(templates[i], context,
region, PHPUiImages
.get(PHPUiImages.IMG_OBJS_TEMPLATE)));
}
}
}
}
/**
* Returns true
if one line is completely selected or if
* multiple lines are selected. Being completely selected means that all
* characters except the new line characters are selected.
*
* @return true
if one or multiple lines are selected
* @since 2.1
*/
private boolean areMultipleLinesSelected(ITextViewer viewer) {
if (viewer == null)
return false;
Point s = viewer.getSelectedRange();
if (s.y == 0)
return false;
try {
IDocument document = viewer.getDocument();
int startLine = document.getLineOfOffset(s.x);
int endLine = document.getLineOfOffset(s.x + s.y);
IRegion line = document.getLineInformation(startLine);
return startLine != endLine
|| (s.x == line.getOffset() && s.y == line.getLength());
} catch (BadLocationException x) {
return false;
}
}
}