/*******************************************************************************
* 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.php.internal.core.util.text.TextSequence;
/**
* This context represents the state when staying in a function parameter. <br/>
* Examples:
*
* <pre>
* 1. function foo(A|) {}
* 2. function foo(A $|) {}
* 3. function foo($a, |) {}
* etc...
* </pre>
*
* @author michael
*/
public abstract class FunctionParameterContext extends FunctionDeclarationContext {
/**
* Scans the function parameters from the end to the beginning, and looks
* for the special character that determines what kind of code assist should
* we invoke:
* <ul>
* <li>'$' means: variable code assist</li>
* <li>'=' means: variable initializer code assist</li>
* <li>',' or '(' means: variable type code assist</li>
* </ul>
*
* @return
*/
protected char getTriggerChar() {
TextSequence statementText = getStatementText();
int functionEnd = getFunctionEnd();
// are we inside parameters part in function declaration statement
for (int i = statementText.length() - 1; i >= functionEnd; i--) {
if (statementText.charAt(i) == '(') {
int j = statementText.length() - 1;
for (; j > i; j--) {
char charAt = statementText.charAt(j);
char charAtBefore = 0;
if (j > i + 1) {
charAtBefore = statementText.charAt(j);
}
if (charAt == '$' || charAt == '=' || charAt == ',' || (charAt == ':' && charAtBefore == ':')) {
return charAt;
}
}
return statementText.charAt(i);
}
}
return 0;
}
}