/*
* 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 org.cfeclipse.cfml.editors.actions;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.cfeclipse.cfml.editors.codefolding.CodeFoldingSetter;
import org.eclipse.jface.action.IAction;
import org.eclipse.jface.text.IDocument;
import org.eclipse.jface.text.IRewriteTarget;
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.IWorkbenchWindow;
import org.eclipse.ui.IWorkbenchWindowActionDelegate;
import org.eclipse.ui.texteditor.ITextEditor;
/**
* @author Stephen Milligan
*/
public class RTrimAction implements IWorkbenchWindowActionDelegate,IEditorActionDelegate {
ITextEditor editor = null;
CodeFoldingSetter foldingSetter = null;
/**
*
*/
public RTrimAction() {
super();
}
public void setActiveEditor(IAction action, IEditorPart targetEditor) {
if (targetEditor instanceof ITextEditor) {
editor = (ITextEditor) targetEditor;
foldingSetter = new CodeFoldingSetter(editor);
}
}
/**
* this gets called for every action
*/
public void run(IAction action) {
IDocument doc = editor.getDocumentProvider().getDocument(editor.getEditorInput());
ITextSelection sel = (ITextSelection) editor.getSelectionProvider().getSelection();
// Get the current cursor position / selection so we can keep it in place
int cursorOffset = sel.getOffset();
int selectionLength = sel.getLength();
// Compile the rTrim regex and create a matcher to perform the replacement
Pattern trimPattern = Pattern.compile("[\\t ]+$", Pattern.CANON_EQ);
Matcher trimmer = trimPattern.matcher("");
String oldText;
String newText;
//We only try this if we can!
if(editor != null && editor.isEditable()){
try {
// foldingSetter.takeSnapshot();
// Loop over each line, performing the right trim
IRewriteTarget target= (IRewriteTarget)editor.getAdapter(IRewriteTarget.class);
if (target != null)
target.beginCompoundChange();
int currentLine = 0;
while (currentLine < doc.getNumberOfLines()) {
int offset = doc.getLineOffset(currentLine);
int length = doc.getLineLength(currentLine);
oldText = doc.get(offset, length);
trimmer.reset(oldText);
newText = trimmer.replaceAll("");
// Replace the old line if the length is different
if (newText.length() != length) {
doc.replace(offset, length, newText);
// Update the cursor offset for the characters removed
if (offset < cursorOffset) {
cursorOffset -= (length - newText.length());
}
}
currentLine++;
}
TextSelection selection = new TextSelection(doc, cursorOffset, selectionLength);
editor.getSelectionProvider().setSelection(selection);
if (target != null)
target.endCompoundChange();
// foldingSetter.restoreSnapshot();
} catch (Exception blx) {
blx.printStackTrace();
}
}
}
public void selectionChanged(IAction action, ISelection selection){
//not setting active editor anymore
}
public void dispose() {
// TODO Auto-generated method stub
}
public void init(IWorkbenchWindow window) {
IEditorPart activeEditor = window.getActivePage().getActiveEditor();
if(activeEditor instanceof ITextEditor){
editor = (ITextEditor)activeEditor;
}
}
}