--- /dev/null
+/**********************************************************************
+ Copyright (c) 2000, 2002 IBM Corp. 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 implementation
+ www.phpeclipse.de
+ **********************************************************************/
+package net.sourceforge.phpeclipse.phpeditor.php;
+
+import net.sourceforge.phpdt.internal.compiler.parser.Scanner;
+
+import org.eclipse.jface.text.BadLocationException;
+import org.eclipse.jface.text.IDocument;
+import org.eclipse.jface.text.ITextDoubleClickStrategy;
+import org.eclipse.jface.text.ITextViewer;
+
+/**
+ * Double click strategy aware of PHP identifier syntax rules.
+ */
+public class PHPDoubleClickSelector implements ITextDoubleClickStrategy {
+
+ protected ITextViewer fText;
+
+ protected int fPos;
+
+ protected int fStartPos;
+
+ protected int fEndPos;
+
+ protected static char[] fgBrackets = { '{', '}', '(', ')', '[', ']', '"',
+ '"' };
+
+ /*
+ * Create a PHPDoubleClickSelector.
+ */
+ public PHPDoubleClickSelector() {
+ super();
+ }
+
+ /*
+ * (non-Javadoc) Method declared on ITextDoubleClickStrategy
+ */
+ public void doubleClicked(ITextViewer text) {
+
+ fPos = text.getSelectedRange().x;
+
+ if (fPos < 0)
+ return;
+
+ fText = text;
+
+ if (!selectBracketBlock())
+ selectWord();
+ }
+
+ /**
+ * Match the brackets at the current selection. Return true if successful,
+ * false otherwise.
+ */
+ protected boolean matchBracketsAt() {
+
+ char prevChar, nextChar;
+
+ int i;
+ int bracketIndex1 = fgBrackets.length;
+ int bracketIndex2 = fgBrackets.length;
+
+ fStartPos = -1;
+ fEndPos = -1;
+
+ // get the chars preceding and following the start position
+ try {
+
+ IDocument doc = fText.getDocument();
+
+ prevChar = doc.getChar(fPos - 1);
+ nextChar = doc.getChar(fPos);
+
+ // is the char either an open or close bracket?
+ for (i = 0; i < fgBrackets.length; i = i + 2) {
+ if (prevChar == fgBrackets[i]) {
+ fStartPos = fPos - 1;
+ bracketIndex1 = i;
+ }
+ }
+ for (i = 1; i < fgBrackets.length; i = i + 2) {
+ if (nextChar == fgBrackets[i]) {
+ fEndPos = fPos;
+ bracketIndex2 = i;
+ }
+ }
+
+ if (fStartPos > -1 && bracketIndex1 < bracketIndex2) {
+ fEndPos = searchForClosingBracket(fStartPos, prevChar,
+ fgBrackets[bracketIndex1 + 1], doc);
+ if (fEndPos > -1)
+ return true;
+ else
+ fStartPos = -1;
+ } else if (fEndPos > -1) {
+ fStartPos = searchForOpenBracket(fEndPos,
+ fgBrackets[bracketIndex2 - 1], nextChar, doc);
+ if (fStartPos > -1)
+ return true;
+ else
+ fEndPos = -1;
+ }
+
+ } catch (BadLocationException x) {
+ }
+
+ return false;
+ }
+
+ /**
+ * Select the word at the current selection. Return true if successful,
+ * false otherwise.
+ */
+ protected boolean matchWord() {
+
+ IDocument doc = fText.getDocument();
+
+ try {
+
+ int pos = fPos;
+ char c;
+
+ while (pos >= 0) {
+ c = doc.getChar(pos);
+ if (!Scanner.isPHPIdentifierPart(c) && (c != '$')) {
+ break;
+ }
+ --pos;
+ }
+
+ fStartPos = pos;
+
+ pos = fPos;
+ int length = doc.getLength();
+
+ while (pos < length) {
+ c = doc.getChar(pos);
+ if (!Scanner.isPHPIdentifierPart(c) && (c != '$'))
+ break;
+ ++pos;
+ }
+
+ fEndPos = pos;
+
+ return true;
+
+ } catch (BadLocationException x) {
+ }
+
+ return false;
+ }
+
+ /**
+ * Returns the position of the closing bracket after startPosition.
+ *
+ * @returns the location of the closing bracket.
+ * @param startPosition -
+ * the beginning position
+ * @param openBracket -
+ * the character that represents the open bracket
+ * @param closeBracket -
+ * the character that represents the close bracket
+ * @param document -
+ * the document being searched
+ */
+ protected int searchForClosingBracket(int startPosition, char openBracket,
+ char closeBracket, IDocument document) throws BadLocationException {
+ int stack = 1;
+ int closePosition = startPosition + 1;
+ int length = document.getLength();
+ char nextChar;
+
+ while (closePosition < length && stack > 0) {
+ nextChar = document.getChar(closePosition);
+ if (nextChar == openBracket && nextChar != closeBracket)
+ stack++;
+ else if (nextChar == closeBracket)
+ stack--;
+ closePosition++;
+ }
+
+ if (stack == 0)
+ return closePosition - 1;
+ else
+ return -1;
+
+ }
+
+ /**
+ * Returns the position of the open bracket before startPosition.
+ *
+ * @returns the location of the starting bracket.
+ * @param startPosition -
+ * the beginning position
+ * @param openBracket -
+ * the character that represents the open bracket
+ * @param closeBracket -
+ * the character that represents the close bracket
+ * @param document -
+ * the document being searched
+ */
+ protected int searchForOpenBracket(int startPosition, char openBracket,
+ char closeBracket, IDocument document) throws BadLocationException {
+ int stack = 1;
+ int openPos = startPosition - 1;
+ char nextChar;
+
+ while (openPos >= 0 && stack > 0) {
+ nextChar = document.getChar(openPos);
+ if (nextChar == closeBracket && nextChar != openBracket)
+ stack++;
+ else if (nextChar == openBracket)
+ stack--;
+ openPos--;
+ }
+
+ if (stack == 0)
+ return openPos + 1;
+ else
+ return -1;
+ }
+
+ /**
+ * Select the area between the selected bracket and the closing bracket.
+ * Return true if successful.
+ */
+ protected boolean selectBracketBlock() {
+ if (matchBracketsAt()) {
+
+ if (fStartPos == fEndPos)
+ fText.setSelectedRange(fStartPos, 0);
+ else
+ fText.setSelectedRange(fStartPos + 1, fEndPos - fStartPos - 1);
+
+ return true;
+ }
+ return false;
+ }
+
+ /**
+ * Select the word at the current selection.
+ */
+ protected void selectWord() {
+ if (matchWord()) {
+
+ if (fStartPos == fEndPos)
+ fText.setSelectedRange(fStartPos, 0);
+ else
+ fText.setSelectedRange(fStartPos + 1, fEndPos - fStartPos - 1);
+ }
+ }
+}
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