/*******************************************************************************
* Copyright (c) 2009 IBM Corporation 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:
* IBM Corporation - initial API and implementation
* Zend Technologies
*******************************************************************************/
package org.eclipse.php.internal.core.codeassist.contexts;
import org.eclipse.dltk.core.*;
import org.eclipse.jface.text.BadLocationException;
import org.eclipse.php.internal.core.PHPVersion;
import org.eclipse.php.internal.core.documentModel.parser.regions.IPhpScriptRegion;
import org.eclipse.php.internal.core.documentModel.parser.regions.PHPRegionTypes;
import org.eclipse.php.internal.core.typeinference.PHPModelUtils;
import org.eclipse.php.internal.core.util.text.PHPTextSequenceUtilities;
import org.eclipse.php.internal.core.util.text.TextSequence;
import org.eclipse.wst.sse.core.internal.provisional.text.ITextRegion;
/**
* This context represents state when staying in a namespace member completion. <br/>
* Examples:
*
* <pre>
* 1. A\B\|
* 2. A\fo|
* 3. \fo|
* etc...
* </pre>
*
* @author michael
*/
public class NamespaceMemberContext extends StatementContext {
private IType[] namespaces;
private int elementStart;
private boolean isGlobal;
public boolean isValid(ISourceModule sourceModule, int offset,
CompletionRequestor requestor) {
if (!super.isValid(sourceModule, offset, requestor)) {
return false;
}
if (getPhpVersion().isLessThan(PHPVersion.PHP5_3)) {
return false;
}
TextSequence statementText = getStatementText();
int totalLength = statementText.length();
int endPosition = PHPTextSequenceUtilities.readBackwardSpaces(
statementText, totalLength); // read whitespace
elementStart = PHPTextSequenceUtilities.readIdentifierStartIndex(
statementText, endPosition, true);
elementStart = PHPTextSequenceUtilities.readBackwardSpaces(
statementText, elementStart);
if (elementStart < 1) { // there's no trigger of length less than 1
// characters
return false;
}
String triggerText = statementText.subSequence(elementStart - 1,
elementStart).toString();
if (!triggerText.equals("\\")) { //$NON-NLS-1$
return false;
}
isGlobal = false;
if (elementStart == 1) {
isGlobal = true;
return true;
}
int endNamespace = PHPTextSequenceUtilities.readBackwardSpaces(
statementText, elementStart - 1);
int nsNameStart = PHPTextSequenceUtilities.readNamespaceStartIndex(
statementText, endNamespace, false);
String nsName = statementText.subSequence(nsNameStart, elementStart)
.toString();
if (nsName.equals("\\")) { //$NON-NLS-1$
isGlobal = true;
return true;
}
try {
namespaces = PHPModelUtils.getNamespaceOf(nsName, sourceModule,
offset, null, null);
} catch (ModelException e) {
if (DLTKCore.DEBUG) {
e.printStackTrace();
}
}
return true;
}
/**
* Returns the start position of class/object element relative to the text
* sequence.
*
* @see #getStatementText()
*/
public int getElementStart() {
return elementStart;
}
/**
* Returns the left hand side possible namespace elements.
*/
public IType[] getNamespaces() {
return namespaces;
}
/**
* Returns whether the namespace is global (only the '\' presents in the
* left side)
*/
public boolean isGlobal() {
return isGlobal;
}
public String getPrefix() throws BadLocationException {
if (hasWhitespaceBeforeCursor()) {
return ""; //$NON-NLS-1$
}
TextSequence statementText = getStatementText();
int statementLength = statementText.length();
int prefixEnd = PHPTextSequenceUtilities.readBackwardSpaces(
statementText, statementLength); // read whitespace
int prefixStart = PHPTextSequenceUtilities.readIdentifierStartIndex(
statementText, prefixEnd, true);
return statementText.subSequence(prefixStart, prefixEnd).toString();
}
public int getPrefixEnd() throws BadLocationException {
ITextRegion phpToken = getPHPToken();
if (phpToken.getType() == PHPRegionTypes.PHP_NS_SEPARATOR) {
IPhpScriptRegion phpScriptRegion = getPhpScriptRegion();
ITextRegion nextRegion = phpScriptRegion.getPhpToken(phpToken
.getEnd());
return getRegionCollection().getStartOffset()
+ phpScriptRegion.getStart() + nextRegion.getTextEnd();
}
return super.getPrefixEnd();
}
}