patch for 143453 by Vivian Kong

core/org.eclipse.cdt.ui/plugin.properties

@@ -24,6 +24,8 @@ perspective.name=C/C++
 viewsCategory.name=&C/C++
 CView.name=C/C++ Projects
 
+ToggleCommentAction.label= Togg&le Comment
+
 AddBlockCommentAction.label= Add &Block Comment
 
 RemoveBlockCommentAction.label= Remove Bloc&k Comment
@@ -84,6 +86,9 @@ ActionDefinition.comment.description= Turn the selected lines into // style comm
 ActionDefinition.uncomment.name= Uncomment
 ActionDefinition.uncomment.description= Uncomment the selected // style comment lines
 
+ActionDefinition.toggleComment.name= Toggle Comment
+ActionDefinition.toggleComment.description= Toggle comment the selected lines
+
 ActionDefinition.opendecl.name= Open Declaration
 ActionDefinition.opendecl.description= Open an editor on the selected element's declaration(s)
 

core/org.eclipse.cdt.ui/plugin.xml

@@ -857,12 +857,7 @@
             sequence="M1+/"
             schemeId="org.eclipse.ui.defaultAcceleratorConfiguration"
             contextId="org.eclipse.cdt.ui.cEditorScope"
-            commandId="org.eclipse.cdt.ui.edit.text.c.comment"/>
+            commandId="org.eclipse.cdt.ui.edit.text.c.toggle.comment"/>
-     <key
-            sequence="M1+\"
-            contextId="org.eclipse.cdt.ui.cEditorScope"
-            commandId="org.eclipse.cdt.ui.edit.text.c.uncomment"
-            schemeId="org.eclipse.ui.defaultAcceleratorConfiguration"/>    
      <key
             sequence="M1+M2+/"
             contextId="org.eclipse.cdt.ui.cEditorScope"
@@ -960,16 +955,10 @@
             id="org.eclipse.cdt.ui.edit.text.c.format">
       </command>
       <command
-            name="%ActionDefinition.comment.name"
+            name="%ActionDefinition.toggleComment.name"
+            description="%ActionDefinition.toggleComment.description"
             categoryId="org.eclipse.cdt.ui.category.source"
-            description="%ActionDefinition.comment.description"
+            id="org.eclipse.cdt.ui.edit.text.c.toggle.comment">
-            id="org.eclipse.cdt.ui.edit.text.c.comment">
-      </command>
-      <command
-            name="%ActionDefinition.uncomment.name"
-            categoryId="org.eclipse.cdt.ui.category.source"
-            description="%ActionDefinition.uncomment.description"
-            id="org.eclipse.cdt.ui.edit.text.c.uncomment">
       </command>
       <command
             name="%ActionDefinition.addBlockComment.name"

core/org.eclipse.cdt.ui/src/org/eclipse/cdt/internal/ui/actions/AddBlockCommentAction.java

@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2000, 2005 IBM Corporation and others.
+ * Copyright (c) 2000, 2006 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
@@ -53,7 +53,7 @@ public class AddBlockCommentAction extends BlockCommentAction {
 		int selectionOffset= selection.getOffset();
 		int selectionEndOffset= selectionOffset + selection.getLength();
 		List edits= new LinkedList();
-		ITypedRegion partition= docExtension.getPartition(IDocumentExtension3.DEFAULT_PARTITIONING, selectionOffset, false);
+		ITypedRegion partition= docExtension.getPartition(ICPartitions.C_PARTITIONING, selectionOffset, false);
 
 		handleFirstPartition(partition, edits, factory, selectionOffset);
 
@@ -116,7 +116,7 @@ public class AddBlockCommentAction extends BlockCommentAction {
 		}
 
 		// advance to next partition
-		partition= docExtension.getPartition(IDocumentExtension3.DEFAULT_PARTITIONING, partEndOffset, false);
+		partition= docExtension.getPartition(ICPartitions.C_PARTITIONING, partEndOffset, false);
 		partType= partition.getType();
 
 		// start of next partition		

core/org.eclipse.cdt.ui/src/org/eclipse/cdt/internal/ui/actions/RemoveBlockCommentAction.java

@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2000, 2005 IBM Corporation and others.
+ * Copyright (c) 2000, 2006 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
@@ -54,7 +54,7 @@ public class RemoveBlockCommentAction extends BlockCommentAction {
 		int offset= selection.getOffset();
 		int endOffset= offset + selection.getLength();
 
-		ITypedRegion partition= docExtension.getPartition(IDocumentExtension3.DEFAULT_PARTITIONING, offset, false);
+		ITypedRegion partition= docExtension.getPartition(ICPartitions.C_PARTITIONING, offset, false);
 		int partOffset= partition.getOffset();
 		int partEndOffset= partOffset + partition.getLength();
 		
@@ -65,7 +65,7 @@ public class RemoveBlockCommentAction extends BlockCommentAction {
 				edits.add(factory.createEdit(partEndOffset - tokenLength, tokenLength, "")); //$NON-NLS-1$
 			}
 			
-			partition= docExtension.getPartition(IDocumentExtension3.DEFAULT_PARTITIONING, partEndOffset, false);
+			partition= docExtension.getPartition(ICPartitions.C_PARTITIONING, partEndOffset, false);
 			partOffset= partition.getOffset();
 			partEndOffset= partOffset + partition.getLength();
 		}

core/org.eclipse.cdt.ui/src/org/eclipse/cdt/internal/ui/editor/CEditor.java

@@ -1022,15 +1022,11 @@ public class CEditor extends TextEditor implements ISelectionChangedListener, IS
 		action.setActionDefinitionId(ICEditorActionDefinitionIds.JOIN_LINES);
 		setAction("Join Lines", action); //$NON-NLS-1$
 		
-		action = new TextOperationAction(CEditorMessages.getResourceBundle(), "Comment.", this, ITextOperationTarget.PREFIX); //$NON-NLS-1$
+		action= new ToggleCommentAction(CEditorMessages.getResourceBundle(), "ToggleComment.", this); //$NON-NLS-1$
-		action.setActionDefinitionId(ICEditorActionDefinitionIds.COMMENT);
+		action.setActionDefinitionId(ICEditorActionDefinitionIds.TOGGLE_COMMENT);
-		setAction("Comment", action); //$NON-NLS-1$
+		setAction("ToggleComment", action); //$NON-NLS-1$
-		markAsStateDependentAction("Comment", true); //$NON-NLS-1$
+		markAsStateDependentAction("ToggleComment", true); //$NON-NLS-1$
-
+		configureToggleCommentAction();
-		action = new TextOperationAction(CEditorMessages.getResourceBundle(), "Uncomment.", this, ITextOperationTarget.STRIP_PREFIX); //$NON-NLS-1$
-		action.setActionDefinitionId(ICEditorActionDefinitionIds.UNCOMMENT);
-		setAction("Uncomment", action); //$NON-NLS-1$
-		markAsStateDependentAction("Uncomment", true); //$NON-NLS-1$
 		
 		action= new AddBlockCommentAction(CEditorMessages.getResourceBundle(), "AddBlockComment.", this);  //$NON-NLS-1$
 		action.setActionDefinitionId(ICEditorActionDefinitionIds.ADD_BLOCK_COMMENT);		
@@ -1372,6 +1368,20 @@ public class CEditor extends TextEditor implements ISelectionChangedListener, IS
 		return null;
 	}
 	
+	/**
+	 * Configures the toggle comment action
+	 *
+	 * @since 4.0.0
+	 */
+	private void configureToggleCommentAction() {
+		IAction action= getAction("ToggleComment"); //$NON-NLS-1$
+		if (action instanceof ToggleCommentAction) {
+			ISourceViewer sourceViewer= getSourceViewer();
+			SourceViewerConfiguration configuration= getSourceViewerConfiguration();
+			((ToggleCommentAction)action).configure(sourceViewer, configuration);
+		}
+	}
+
 	private void configureTabConverter() {
 		if (fTabConverter != null) {
 			IDocumentProvider provider= getDocumentProvider();

core/org.eclipse.cdt.ui/src/org/eclipse/cdt/internal/ui/editor/CEditorMessages.properties

@@ -136,6 +136,10 @@ Uncomment.label=Uncommen&t
 Uncomment.tooltip=Uncomment the Selected C // comment Lines
 Uncomment.description=Uncomment the selected C // comment lines
 
+ToggleComment.label=Togg&le Comment
+ToggleComment.tooltip=Toggle Comment For the Selected Lines
+ToggleComment.description=Toggle comment for the selected lines
+
 AddBlockComment.label=Add &Block Comment
 AddBlockComment.tooltip=Enclose the Selection in a Block Comment
 AddBlockComment.description=Encloses the selection with block comment markers
@@ -194,3 +198,6 @@ GotoPrevMember.label=Go to &previous member
 GotoPrevMember.tooltip=Goes to previous member.
 
 ShowToolTip.label=Show T&ooltip Description
+
+ToggleComment_error_title=Toggle Comment
+ToggleComment_error_message=An error occurred while toggling comments.

core/org.eclipse.cdt.ui/src/org/eclipse/cdt/internal/ui/editor/ICEditorActionDefinitionIds.java

@@ -26,16 +26,12 @@ import org.eclipse.ui.texteditor.ITextEditorActionDefinitionIds;
 public interface ICEditorActionDefinitionIds extends ITextEditorActionDefinitionIds {
 
 	/**
-	 * Action definition ID of the source -> comment action
+	 * Action definition ID of the source -> toggle comment action
-	 * (value <code>"org.eclipse.cdt.ui.edit.text.c.comment"</code>).
+	 * (value <code>"org.eclipse.cdt.ui.edit.text.c.toggle.comment"</code>).
+	 * @since 4.0.0
 	 */
-	public static final String COMMENT = "org.eclipse.cdt.ui.edit.text.c.comment"; //$NON-NLS-1$
+	public static final String TOGGLE_COMMENT= "org.eclipse.cdt.ui.edit.text.c.toggle.comment"; //$NON-NLS-1$
 	
-	/**
-	 * Action definition ID of the source -> uncomment action
-	 * (value <code>"org.eclipse.cdt.ui.edit.text.c.uncomment"</code>).
-	 */
-	public static final String UNCOMMENT = "org.eclipse.cdt.ui.edit.text.c.uncomment"; //$NON-NLS-1$
 	
 	/**
 	 * Action definition ID of the source -> add block comment action

core/org.eclipse.cdt.ui/src/org/eclipse/cdt/internal/ui/editor/ToggleCommentAction.java

@@ -0,0 +1,336 @@
+/*******************************************************************************
+ * Copyright (c) 2000, 2006 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
+ *******************************************************************************/
+
+package org.eclipse.cdt.internal.ui.editor;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.ResourceBundle;
+
+import org.eclipse.jface.dialogs.MessageDialog;
+import org.eclipse.jface.text.BadLocationException;
+import org.eclipse.jface.text.IDocument;
+import org.eclipse.jface.text.IRegion;
+import org.eclipse.jface.text.ITextOperationTarget;
+import org.eclipse.jface.text.ITextSelection;
+import org.eclipse.jface.text.ITypedRegion;
+import org.eclipse.jface.text.Region;
+import org.eclipse.jface.text.TextUtilities;
+import org.eclipse.jface.text.source.ISourceViewer;
+import org.eclipse.jface.text.source.SourceViewerConfiguration;
+import org.eclipse.jface.viewers.ISelection;
+import org.eclipse.swt.custom.BusyIndicator;
+import org.eclipse.swt.widgets.Display;
+import org.eclipse.swt.widgets.Shell;
+import org.eclipse.ui.texteditor.ITextEditor;
+import org.eclipse.ui.texteditor.ResourceAction;
+import org.eclipse.ui.texteditor.TextEditorAction;
+
+import org.eclipse.cdt.ui.CUIPlugin;
+
+/**
+ * An action which toggles comment prefixes on the selected lines.
+ *
+ * @since 4.0.0
+ */
+public final class ToggleCommentAction extends TextEditorAction {
+
+	/** The text operation target */
+	private ITextOperationTarget fOperationTarget;
+	/** The document partitioning */
+	private String fDocumentPartitioning;
+	/** The comment prefixes */
+	private Map fPrefixesMap;
+
+	/**
+	 * Creates and initializes the action for the given text editor. The action
+	 * configures its visual representation from the given resource bundle.
+	 *
+	 * @param bundle the resource bundle
+	 * @param prefix a prefix to be prepended to the various resource keys
+	 *   (described in <code>ResourceAction</code> constructor), or
+	 *   <code>null</code> if none
+	 * @param editor the text editor
+	 * @see ResourceAction#ResourceAction(ResourceBundle, String, int)
+	 */
+	public ToggleCommentAction(ResourceBundle bundle, String prefix, ITextEditor editor) {
+		super(bundle, prefix, editor);
+	}
+
+	/**
+	 * Implementation of the <code>IAction</code> prototype. Checks if the selected
+	 * lines are all commented or not and uncomments/comments them respectively.
+	 */
+	public void run() {
+		if (fOperationTarget == null || fDocumentPartitioning == null || fPrefixesMap == null)
+			return;
+
+		ITextEditor editor= getTextEditor();
+		if (editor == null)
+			return;
+
+		if (!validateEditorInputState())
+			return;
+
+		final int operationCode;
+		if (isSelectionCommented(editor.getSelectionProvider().getSelection()))
+			operationCode= ITextOperationTarget.STRIP_PREFIX;
+		else
+			operationCode= ITextOperationTarget.PREFIX;
+
+		Shell shell= editor.getSite().getShell();
+		if (!fOperationTarget.canDoOperation(operationCode)) {
+			if (shell != null)
+				MessageDialog.openError(shell, CEditorMessages.getString("ToggleComment_error_title"), CEditorMessages.getString("ToggleComment_error_message"));
+			return;
+		}
+
+		Display display= null;
+		if (shell != null && !shell.isDisposed())
+			display= shell.getDisplay();
+
+		BusyIndicator.showWhile(display, new Runnable() {
+			public void run() {
+				fOperationTarget.doOperation(operationCode);
+			}
+		});
+	}
+
+	/**
+	 * Is the given selection single-line commented?
+	 *
+	 * @param selection Selection to check
+	 * @return <code>true</code> iff all selected lines are commented
+	 */
+	private boolean isSelectionCommented(ISelection selection) {
+		if (!(selection instanceof ITextSelection))
+			return false;
+
+		ITextSelection textSelection= (ITextSelection) selection;
+		if (textSelection.getStartLine() < 0 || textSelection.getEndLine() < 0)
+			return false;
+
+		IDocument document= getTextEditor().getDocumentProvider().getDocument(getTextEditor().getEditorInput());
+
+		try {
+
+			IRegion block= getTextBlockFromSelection(textSelection, document);
+			ITypedRegion[] regions= TextUtilities.computePartitioning(document, fDocumentPartitioning, block.getOffset(), block.getLength(), false);
+
+			int lineCount= 0;
+			int[] lines= new int[regions.length * 2]; // [startline, endline, startline, endline, ...]
+			
+			//For each partition in the text selection, figure out what are the startlines and endlines for
+			//each partition.  Count the number of lines that are selected.
+			for (int i = 0, j = 0; i < regions.length; i++, j+= 2) {
+				// start line of region
+				lines[j]= getFirstCompleteLineOfRegion(regions[i], document);
+				// end line of region
+				int length= regions[i].getLength();
+				int offset= regions[i].getOffset() + length;
+				if (length > 0)
+					offset--;
+				
+				//if there is no startline for this region (startline = -1)
+				//then there is no endline
+				//otherwise, get the line number of the endline and store it in the array
+				lines[j + 1]= (lines[j] == -1 ? -1 : document.getLineOfOffset(offset));
+				
+				//count the number of lines that are selected in this region
+				lineCount += lines[j + 1] - lines[j] + 1;
+				
+				assert i < regions.length;
+				assert j < regions.length * 2;
+			}
+				
+			// Perform the check
+			for (int i = 0, j = 0; i < regions.length; i++, j += 2) {
+				String[] prefixes= (String[]) fPrefixesMap.get(regions[i].getType());
+				if (prefixes != null && prefixes.length > 0 && lines[j] >= 0 && lines[j + 1] >= 0)
+					if (!isBlockCommented(lines[j], lines[j + 1], prefixes, document))
+						return false;
+			}
+
+			return true;
+
+		} catch (BadLocationException x) {
+			// should not happen
+			CUIPlugin.getDefault().log(x);
+		}
+
+		return false;
+	}
+
+	/**
+	 * Creates a region describing the text block (something that starts at
+	 * the beginning of a line) completely containing the current selection.
+	 *
+	 * @param selection The selection to use
+	 * @param document The document
+	 * @return the region describing the text block comprising the given selection
+	 */
+	private IRegion getTextBlockFromSelection(ITextSelection selection, IDocument document) {
+
+		try {
+			IRegion line= document.getLineInformationOfOffset(selection.getOffset());
+			int length= selection.getLength() == 0 ? line.getLength() : selection.getLength() + (selection.getOffset() - line.getOffset());
+			return new Region(line.getOffset(), length);
+
+		} catch (BadLocationException x) {
+			// should not happen
+			CUIPlugin.getDefault().log(x);
+		}
+
+		return null;
+	}
+
+	/**
+	 * Returns the index of the first line whose start offset is in the given text range.
+	 *
+	 * @param region the text range in characters where to find the line
+	 * @param document The document
+	 * @return the first line whose start index is in the given range, -1 if there is no such line
+	 */
+	private int getFirstCompleteLineOfRegion(IRegion region, IDocument document) {
+
+		try {
+
+			int startLine= document.getLineOfOffset(region.getOffset());
+
+			int offset= document.getLineOffset(startLine);
+			if (offset >= region.getOffset())
+				return startLine;
+
+			offset= document.getLineOffset(startLine + 1);
+			return (offset > region.getOffset() + region.getLength() ? -1 : startLine + 1);
+
+		} catch (BadLocationException x) {
+			// should not happen
+			CUIPlugin.getDefault().log(x);
+		}
+
+		return -1;
+	}
+
+	/**
+	 * Determines whether each line is prefixed by one of the prefixes.
+	 *
+	 * @param startLine Start line in document
+	 * @param endLine End line in document
+	 * @param prefixes Possible comment prefixes
+	 * @param document The document
+	 * @return <code>true</code> iff each line from <code>startLine</code>
+	 *             to and including <code>endLine</code> is prepended by one
+	 *             of the <code>prefixes</code>, ignoring whitespace at the
+	 *             begin of line
+	 */
+	private boolean isBlockCommented(int startLine, int endLine, String[] prefixes, IDocument document) {
+
+		try {
+
+			// check for occurrences of prefixes in the given lines
+			for (int i= startLine; i <= endLine; i++) {
+
+				IRegion line= document.getLineInformation(i);
+				String text= document.get(line.getOffset(), line.getLength());
+
+				int[] found= TextUtilities.indexOf(prefixes, text, 0);
+
+				if (found[0] == -1)
+					// found a line which is not commented
+					return false;
+
+				String s= document.get(line.getOffset(), found[0]);
+				s= s.trim();
+				if (s.length() != 0)
+					// found a line which is not commented
+					return false;
+
+			}
+
+			return true;
+
+		} catch (BadLocationException x) {
+			// should not happen
+			CUIPlugin.getDefault().log(x);
+		}
+
+		return false;
+	}
+
+	/**
+	 * Implementation of the <code>IUpdate</code> prototype method discovers
+	 * the operation through the current editor's
+	 * <code>ITextOperationTarget</code> adapter, and sets the enabled state
+	 * accordingly.
+	 */
+	public void update() {
+		super.update();
+
+		if (!canModifyEditor()) {
+			setEnabled(false);
+			return;
+		}
+
+		ITextEditor editor= getTextEditor();
+		if (fOperationTarget == null && editor != null)
+			fOperationTarget= (ITextOperationTarget) editor.getAdapter(ITextOperationTarget.class);
+
+		boolean isEnabled= (fOperationTarget != null && fOperationTarget.canDoOperation(ITextOperationTarget.PREFIX) && fOperationTarget.canDoOperation(ITextOperationTarget.STRIP_PREFIX));
+		setEnabled(isEnabled);
+	}
+
+	/*
+	 * @see TextEditorAction#setEditor(ITextEditor)
+	 */
+	public void setEditor(ITextEditor editor) {
+		super.setEditor(editor);
+		fOperationTarget= null;
+	}
+	
+	/**
+	 * For the different content types, get its default comment prefix and store the prefixes.
+	 * @param sourceViewer
+	 * @param configuration
+	 */
+	public void configure(ISourceViewer sourceViewer, SourceViewerConfiguration configuration) {
+		fPrefixesMap= null;
+
+		String[] types= configuration.getConfiguredContentTypes(sourceViewer);
+		Map prefixesMap= new HashMap(types.length);
+		for (int i= 0; i < types.length; i++) {
+			String type= types[i];
+			String[] prefixes= configuration.getDefaultPrefixes(sourceViewer, type);
+			if (prefixes != null && prefixes.length > 0) {
+				int emptyPrefixes= 0;
+				for (int j= 0; j < prefixes.length; j++)
+					if (prefixes[j].length() == 0)
+						emptyPrefixes++;
+
+				if (emptyPrefixes > 0) {
+					String[] nonemptyPrefixes= new String[prefixes.length - emptyPrefixes];
+					for (int j= 0, k= 0; j < prefixes.length; j++) {
+						String prefix= prefixes[j];
+						if (prefix.length() != 0) {
+							nonemptyPrefixes[k]= prefix;
+							k++;
+						}
+					}
+					prefixes= nonemptyPrefixes;
+				}
+
+				prefixesMap.put(type, prefixes);
+			}
+		}
+		fDocumentPartitioning= configuration.getConfiguredDocumentPartitioning(sourceViewer);
+		fPrefixesMap= prefixesMap;
+	}
+}