X-Git-Url: http://git.phpeclipse.com

diff --git a/net.sourceforge.phpeclipse.ui/src/net/sourceforge/phpeclipse/phpeditor/php/PHPDoubleClickSelector.java b/net.sourceforge.phpeclipse.ui/src/net/sourceforge/phpeclipse/phpeditor/php/PHPDoubleClickSelector.java
new file mode 100644
index 0000000..9a38d3b
--- /dev/null
+++ b/net.sourceforge.phpeclipse.ui/src/net/sourceforge/phpeclipse/phpeditor/php/PHPDoubleClickSelector.java
@@ -0,0 +1,261 @@
+/**********************************************************************
+ 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);
+		}
+	}
+}