### Eclipse Workspace Patch 1.0
#P org.eclipse.ui.workbench.texteditor
Index: src/org/eclipse/ui/texteditor/FindNextAction.java
===================================================================
RCS file: /cvsroot/eclipse/org.eclipse.ui.workbench.texteditor/src/org/eclipse/ui/texteditor/FindNextAction.java,v
retrieving revision 1.22
diff -u -r1.22 FindNextAction.java
--- src/org/eclipse/ui/texteditor/FindNextAction.java	10 Jul 2006 09:56:52 -0000	1.22
+++ src/org/eclipse/ui/texteditor/FindNextAction.java	15 Jun 2007 14:41:46 -0000
@@ -124,12 +124,16 @@
 	 * @return the find string
 	 */
 	private String getFindString() {
-		String string= getSelectionString();
-
-		if ((string == null || fRegExSearch && string.equals(fSelection)) && !fFindHistory.isEmpty())
-			string= (String) fFindHistory.get(0);
-
-		return string;
+		String fullSelection= fTarget.getSelectionText();
+		if (fullSelection == null) // workaround for https://bugs.eclipse.org/bugs/show_bug.cgi?id=192837
+			fullSelection= ""; //$NON-NLS-1$
+		String firstLine= getFirstLine(fullSelection);
+		if ((firstLine.length() == 0 || fRegExSearch && fullSelection.equals(fSelection)) && !fFindHistory.isEmpty())
+			return (String) fFindHistory.get(0);
+		else if (fRegExSearch && fullSelection.length() > 0)
+			return FindReplaceDialog.escapeForRegExPattern(fullSelection);
+		else
+			return firstLine;
 	}
 
 	/**
@@ -389,24 +393,19 @@
 	}
 
 	/**
-	 * Returns the actual selection of the find replace target.
-	 *
-	 * @return the actual selection of the find replace target
+	 * Returns the first line of the given selection.
+	 * 
+	 * @param selection the selection
+	 * @return the first line of the selection
 	 */
-	private String getSelectionString() {
-
-		/*
-		 * 1GF86V3: ITPUI:WINNT - Internal errors using Find/Replace Dialog
-		 * Now uses TextUtilities rather than focusing on '\n'
-		 */
-		String selection= fTarget.getSelectionText();
-		if (selection != null && selection.length() > 0) {
+	private String getFirstLine(String selection) {
+		if (selection.length() > 0) {
 			int[] info= TextUtilities.indexOf(TextUtilities.DELIMITERS, selection, 0);
 			if (info[0] > 0)
 				return selection.substring(0, info[0]);
 			else if (info[0] == -1)
 				return selection;
 		}
-		return null;
+		return selection;
 	}
 }
Index: src/org/eclipse/ui/texteditor/FindReplaceDialog.java
===================================================================
RCS file: /cvsroot/eclipse/org.eclipse.ui.workbench.texteditor/src/org/eclipse/ui/texteditor/FindReplaceDialog.java,v
retrieving revision 1.66
diff -u -r1.66 FindReplaceDialog.java
--- src/org/eclipse/ui/texteditor/FindReplaceDialog.java	4 Jun 2007 16:19:56 -0000	1.66
+++ src/org/eclipse/ui/texteditor/FindReplaceDialog.java	15 Jun 2007 14:41:46 -0000
@@ -918,19 +918,20 @@
 	// ------- init / close ---------------------------------------
 
 	/**
-	 * Returns the actual selection of the find replace target.
-	 * @return the selection of the target
+	 * Returns the first line of the given selection.
+	 * 
+	 * @param selection the selection
+	 * @return the first line of the selection
 	 */
-	private String getSelectionString() {
-		String selection= fTarget.getSelectionText();
-		if (selection != null && selection.length() > 0) {
+	private String getFirstLine(String selection) {
+		if (selection.length() > 0) {
 			int[] info= TextUtilities.indexOf(TextUtilities.DELIMITERS, selection, 0);
 			if (info[0] > 0)
 				return selection.substring(0, info[0]);
 			else if (info[0] == -1)
 				return selection;
 		}
-		return null;
+		return selection;
 	}
 
 	/**
@@ -1008,11 +1009,17 @@
 	 */
 	private void initFindStringFromSelection() {
 		if (fTarget != null && okToUse(fFindField)) {
-			String selection= getSelectionString();
+			String fullSelection= fTarget.getSelectionText();
+			if (fullSelection == null) // workaround for https://bugs.eclipse.org/bugs/show_bug.cgi?id=192837
+				fullSelection= ""; //$NON-NLS-1$
+			String firstLine= getFirstLine(fullSelection);
+			boolean isRegEx= isRegExSearchAvailableAndChecked();
 			fFindField.removeModifyListener(fFindModifyListener);
-			if (selection != null) {
-				fFindField.setText(selection);
-				if (!selection.equals(fTarget.getSelectionText())) {
+			if (firstLine.length() > 0 || (isRegEx && fullSelection.length() > 0)) {
+				String pattern= isRegEx ? escapeForRegExPattern(fullSelection) : firstLine;
+				fFindField.setText(pattern);
+				if (!firstLine.equals(fullSelection)) {
+					// multiple lines selected
 					useSelectedLines(true);
 					fGlobalRadioButton.setSelection(false);
 					fSelectedRangeRadioButton.setSelection(true);
@@ -1032,6 +1039,71 @@
 	}
 
 	/**
+	 * Escapes special characters in the string, such that the resulting pattern
+	 * matches the given string.
+	 * 
+	 * @param string the string to escape
+	 * @return a regex pattern that matches the given string
+	 */
+	public static String escapeForRegExPattern(String string) {
+		//implements https://bugs.eclipse.org/bugs/show_bug.cgi?id=44422
+
+		StringBuffer pattern= new StringBuffer(string.length() + 16);
+		int length= string.length();
+		if (length > 0 && string.charAt(0) == '^')
+			pattern.append('\\');
+		for (int i= 0; i < length; i++) {
+			char ch= string.charAt(i);
+			switch (ch) {
+				case '\\':
+				case '(':
+				case ')':
+				case '[':
+				case ']':
+				case '{':
+				case '}':
+				case '.':
+				case '?':
+				case '*':
+				case '+':
+				case '|':
+					pattern.append('\\').append(ch);
+					break;
+					
+				case '\n':
+					pattern.append("\\n"); //$NON-NLS-1$
+					break;
+				case '\r':
+					pattern.append("\\r"); //$NON-NLS-1$
+					break;
+				case '\t':
+					pattern.append("\\t"); //$NON-NLS-1$
+					break;
+				case '\f':
+					pattern.append("\\f"); //$NON-NLS-1$
+					break;
+				case 0x07:
+					pattern.append("\\a"); //$NON-NLS-1$
+					break;
+				case 0x1B:
+					pattern.append("\\e"); //$NON-NLS-1$
+					break;
+
+				default:
+					if (0 <= ch && ch < 0x20) {
+						pattern.append("\\x"); //$NON-NLS-1$
+						pattern.append(Integer.toHexString(ch).toUpperCase());
+					} else {
+						pattern.append(ch);
+					}
+			}
+		}
+		if (length > 0 && string.charAt(length - 1) == '$')
+			pattern.insert(pattern.length() - 1, '\\');
+		return pattern.toString();
+	}
+
+	/**
 	 * Initializes the anchor used as starting point for incremental searching.
 	 * @since 2.0
 	 */