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

diff --git a/net.sourceforge.phpeclipse/src/net/sourceforge/phpeclipse/phpeditor/ToggleCommentAction.java b/net.sourceforge.phpeclipse/src/net/sourceforge/phpeclipse/phpeditor/ToggleCommentAction.java
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index 0000000..0ca710d
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@@ -0,0 +1,163 @@
+/*******************************************************************************
+ * Copyright (c) 2000, 2004 IBM Corporation 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 API and implementation
+ *******************************************************************************/
+
+package net.sourceforge.phpeclipse.phpeditor;
+
+import java.util.ResourceBundle;
+
+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.ITextOperationTarget;
+import org.eclipse.jface.text.ITextSelection;
+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;
+
+
+
+/**
+ * An action which toggles the single line comment prefixes on the selected lines.
+ * 
+ * @since 3.0
+ */
+public final class ToggleCommentAction extends TextEditorAction {
+	
+	/** The text operation target */
+	private ITextOperationTarget fOperationTarget;
+	/** The comment prefixes */
+	private String[] fCommentPrefixes;
+	
+	/**
+	 * 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
+	 */
+	public ToggleCommentAction(ResourceBundle bundle, String prefix, ITextEditor editor, String[] commentPrefixes) {
+		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.
+	 */
+	public void run() {
+		if (fOperationTarget == null)
+			return;
+			
+		ITextEditor editor= getTextEditor();
+		if (!(editor instanceof PHPEditor))
+			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, PHPEditorMessages.getString("ToggleComment.error.title"), PHPEditorMessages.getString("ToggleComment.error.message")); //$NON-NLS-1$ //$NON-NLS-2$
+			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 single-line commented
+	 */
+	private boolean isSelectionCommented(ISelection selection) {
+		if (!(selection instanceof ITextSelection))
+			return false;
+			
+		ITextSelection ts= (ITextSelection) selection;
+		if (ts.getStartLine() < 0 || ts.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);
+				}
+			}
+			return false;
+		}
+		return true;
+	}
+
+	/**
+	 * 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;
+	}
+}