Action borrowed from cfeclipse: "remove trailing spaces at end of file"

[phpeclipse.git] / net.sourceforge.phpeclipse / src / net / sourceforge / phpeclipse / phpeditor / actions / RTrimAction.java

diff --git a/net.sourceforge.phpeclipse/src/net/sourceforge/phpeclipse/phpeditor/actions/RTrimAction.java b/net.sourceforge.phpeclipse/src/net/sourceforge/phpeclipse/phpeditor/actions/RTrimAction.java
new file mode 100644 (file)
index 0000000..154b992
--- /dev/null
+++ b/net.sourceforge.phpeclipse/src/net/sourceforge/phpeclipse/phpeditor/actions/RTrimAction.java
@@ -0,0 +1,114 @@
+/*
+ * Created on Oct 15, 2004
+ *
+ * The MIT License
+ * Copyright (c) 2004 Stephen Milligan
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a 
+ * copy of this software and associated documentation files (the "Software"), 
+ * to deal in the Software without restriction, including without limitation 
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense, 
+ * and/or sell copies of the Software, and to permit persons to whom the Software 
+ * is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in 
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 
+ * SOFTWARE.
+ */
+package net.sourceforge.phpeclipse.phpeditor.actions;
+
+import org.eclipse.jface.action.IAction;
+import org.eclipse.jface.text.IDocument;
+import org.eclipse.jface.text.ITextSelection;
+import org.eclipse.jface.text.TextSelection;
+import org.eclipse.jface.viewers.ISelection;
+import org.eclipse.ui.IEditorActionDelegate;
+import org.eclipse.ui.IEditorPart;
+import org.eclipse.ui.texteditor.ITextEditor;
+
+/**
+ * @author Stephen Milligan
+ */
+public class RTrimAction implements IEditorActionDelegate {
+
+       ITextEditor editor = null;
+
+       /**
+        *  
+        */
+       public RTrimAction() {
+               super();
+       }
+
+       public void setActiveEditor(IAction action, IEditorPart targetEditor) {
+
+               if (targetEditor instanceof ITextEditor) {
+                       editor = (ITextEditor) targetEditor;
+               }
+       }
+
+       /**
+        * this gets called for every action
+        */
+       public void run(IAction action) {
+               IDocument doc = editor.getDocumentProvider().getDocument(editor.getEditorInput());
+               ITextSelection sel = (ITextSelection) editor.getSelectionProvider().getSelection();
+
+               int currentLine = 0;
+               int originalCursorOffset = sel.getOffset();
+               int cursorOffset = originalCursorOffset;
+               int originalSelectionLength = sel.getLength();
+               int selectionLength = originalSelectionLength;
+               String oldText;
+               int     lineEnd;
+               
+               try {
+
+                       while (currentLine < doc.getNumberOfLines()) {
+                               int offset = doc.getLineOffset(currentLine);
+                               int length = doc.getLineLength(currentLine);
+                               oldText = doc.get(offset, length);
+                               
+                               //-- Starts at the end of the line, looking for the first non-first 'white space'
+                               //-- it then breaks out. No point in carrying on, as we have found our true line end
+                               for (lineEnd=oldText.length(); lineEnd > 0; --lineEnd ){
+                                       if ( oldText.charAt(lineEnd-1) != '\t' && oldText.charAt(lineEnd-1) != ' ' ){
+                                               break;
+                                       }
+                               }
+                               
+                               //-- Only replace the line if the lengths are different
+                               if ( lineEnd != oldText.length() ) {
+                                       String newText = oldText.substring(0, lineEnd);
+                                       doc.replace(offset, length, newText);
+
+                                       if (offset + length <= cursorOffset) {
+                                               if (oldText.length() != newText.length()) {
+                                                       cursorOffset -= oldText.length() - newText.length();
+                                               }
+                                       } else if (offset <= cursorOffset + selectionLength     && selectionLength > 0) {
+                                               selectionLength -= oldText.length() - newText.length();
+                                       }       else if (offset + length == cursorOffset + 2) { // Check if the cursor is at the end of the line.
+                                               cursorOffset -= 2;
+                                       }
+                               }
+                               currentLine++;
+                       }
+
+                       TextSelection selection = new TextSelection(doc, cursorOffset, selectionLength);
+                       editor.getSelectionProvider().setSelection(selection);
+               } catch (Exception blx) {
+                       blx.printStackTrace();
+               }
+       }
+
+       public void selectionChanged(IAction action, ISelection selection) {
+       }
+}
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