FIX: added missing org.eclipse.pde.runtime_3.1.1.jar reference
[phpeclipse.git] / net.sourceforge.phpeclipse / src / net / sourceforge / phpeclipse / phpeditor / ToggleCommentAction.java
index 0ca710d..506df17 100644 (file)
@@ -8,9 +8,10 @@
  * Contributors:
  *     IBM Corporation - initial API and implementation
  *******************************************************************************/
-
 package net.sourceforge.phpeclipse.phpeditor;
 
+import java.util.HashMap;
+import java.util.Map;
 import java.util.ResourceBundle;
 
 import net.sourceforge.phpeclipse.PHPeclipsePlugin;
@@ -18,8 +19,14 @@ import net.sourceforge.phpeclipse.PHPeclipsePlugin;
 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;
@@ -31,7 +38,7 @@ import org.eclipse.ui.texteditor.TextEditorAction;
 
 
 /**
- * An action which toggles the single line comment prefixes on the selected lines.
+ * An action which toggles comment prefixes on the selected lines.
  * 
  * @since 3.0
  */
@@ -39,8 +46,10 @@ public final class ToggleCommentAction extends TextEditorAction {
        
        /** The text operation target */
        private ITextOperationTarget fOperationTarget;
+       /** The document partitioning */
+       private String fDocumentPartitioning;
        /** The comment prefixes */
-       private String[] fCommentPrefixes;
+       private Map fPrefixesMap;
        
        /**
         * Creates and initializes the action for the given text editor. The action
@@ -51,23 +60,22 @@ public final class ToggleCommentAction extends TextEditorAction {
         *   (described in <code>ResourceAction</code> constructor), or 
         *   <code>null</code> if none
         * @param editor the text editor
-        * @see ResourceAction#ResourceAction
+        * @see ResourceAction#ResourceAction(ResourceBundle, String, int)
         */
-       public ToggleCommentAction(ResourceBundle bundle, String prefix, ITextEditor editor, String[] commentPrefixes) {
+       public ToggleCommentAction(ResourceBundle bundle, String prefix, ITextEditor editor) {
                super(bundle, prefix, editor);
-               fCommentPrefixes= commentPrefixes;
        }
        
        /**
         * Implementation of the <code>IAction</code> prototype. Checks if the selected
-        * lines are all commented or not and uncomment/comments them respectively.
+        * lines are all commented or not and uncomments/comments them respectively.
         */
        public void run() {
-               if (fOperationTarget == null)
+               if (fOperationTarget == null || fDocumentPartitioning == null || fPrefixesMap == null)
                        return;
                        
                ITextEditor editor= getTextEditor();
-               if (!(editor instanceof PHPEditor))
+               if (editor == null)
                        return;
 
                if (!validateEditorInputState())
@@ -101,37 +109,153 @@ public final class ToggleCommentAction extends TextEditorAction {
         * Is the given selection single-line commented?
         *
         * @param selection Selection to check
-        * @return <code>true</code> iff all selected lines are single-line commented
+        * @return <code>true</code> iff all selected lines are commented
         */
        private boolean isSelectionCommented(ISelection selection) {
                if (!(selection instanceof ITextSelection))
                        return false;
                        
-               ITextSelection ts= (ITextSelection) selection;
-               if (ts.getStartLine() < 0 || ts.getEndLine() < 0)
+               ITextSelection textSelection= (ITextSelection) selection;
+               if (textSelection.getStartLine() < 0 || textSelection.getEndLine() < 0)
                        return false;
                
                IDocument document= getTextEditor().getDocumentProvider().getDocument(getTextEditor().getEditorInput());
-               OUTER: for (int i= ts.getStartLine(); i <= ts.getEndLine(); i++) {
-                       for (int j= 0; j < fCommentPrefixes.length; j++) {
-                               try {
-                                       if (fCommentPrefixes[j].length() == 0)
-                                               continue;
-                                       String s= document.get(document.getLineOffset(i), document.getLineLength(i));
-                                       int index= s.indexOf(fCommentPrefixes[j]);
-                                       if (index >= 0 && s.substring(0, index).trim().length() == 0)
-                                               continue OUTER;
-                               } catch (BadLocationException e) {
-                                       // should not happen
-                                       PHPeclipsePlugin.log(e);
-                               }
+               
+               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 (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--;
+                               lines[j + 1]= (lines[j] == -1 ? -1 : document.getLineOfOffset(offset));
+                               lineCount += lines[j + 1] - lines[j] + 1;
                        }
-                       return false;
+
+                       // 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
+                       PHPeclipsePlugin.log(x);
                }
-               return true;
+               
+               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
+                       PHPeclipsePlugin.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
+                       PHPeclipsePlugin.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
+                       PHPeclipsePlugin.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
@@ -160,4 +284,37 @@ public final class ToggleCommentAction extends TextEditorAction {
                super.setEditor(editor);
                fOperationTarget= null;
        }
+       
+       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;
+       }
 }