Added patch for #1589521 "3 character function names invalid?"
[phpeclipse.git] / net.sourceforge.phpeclipse / src / net / sourceforge / phpeclipse / phpeditor / actions / RTrimAction.java
1 /*
2  * Created on Oct 15, 2004
3  *
4  * The MIT License
5  * Copyright (c) 2004 Stephen Milligan
6  *
7  * Permission is hereby granted, free of charge, to any person obtaining a 
8  * copy of this software and associated documentation files (the "Software"), 
9  * to deal in the Software without restriction, including without limitation 
10  * the rights to use, copy, modify, merge, publish, distribute, sublicense, 
11  * and/or sell copies of the Software, and to permit persons to whom the Software 
12  * is furnished to do so, subject to the following conditions:
13  *
14  * The above copyright notice and this permission notice shall be included in 
15  * all copies or substantial portions of the Software.
16  *
17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 
18  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 
20  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
21  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 
22  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 
23  * SOFTWARE.
24  */
25 package net.sourceforge.phpeclipse.phpeditor.actions;
26
27 import org.eclipse.jface.action.IAction;
28 import org.eclipse.jface.text.IDocument;
29 import org.eclipse.jface.text.ITextSelection;
30 import org.eclipse.jface.text.TextSelection;
31 import org.eclipse.jface.viewers.ISelection;
32 import org.eclipse.ui.IEditorActionDelegate;
33 import org.eclipse.ui.IEditorPart;
34 import org.eclipse.ui.texteditor.ITextEditor;
35
36 /**
37  * @author Stephen Milligan
38  */
39 public class RTrimAction implements IEditorActionDelegate {
40
41         ITextEditor editor = null;
42
43         /**
44          * 
45          */
46         public RTrimAction() {
47                 super();
48         }
49
50         public void setActiveEditor(IAction action, IEditorPart targetEditor) {
51
52                 if (targetEditor instanceof ITextEditor) {
53                         editor = (ITextEditor) targetEditor;
54                 }
55         }
56
57         /**
58          * this gets called for every action
59          */
60         public void run(IAction action) {
61                 IDocument doc = editor.getDocumentProvider().getDocument(
62                                 editor.getEditorInput());
63                 ITextSelection sel = (ITextSelection) editor.getSelectionProvider()
64                                 .getSelection();
65
66                 int currentLine = 0;
67                 int originalCursorOffset = sel.getOffset();
68                 int cursorOffset = originalCursorOffset;
69                 int originalSelectionLength = sel.getLength();
70                 int selectionLength = originalSelectionLength;
71                 String oldText;
72                 int lineEnd;
73
74                 try {
75
76                         while (currentLine < doc.getNumberOfLines()) {
77                                 int offset = doc.getLineOffset(currentLine);
78                                 int length = doc.getLineLength(currentLine);
79                                 oldText = doc.get(offset, length);
80
81                                 // -- Starts at the end of the line, looking for the first
82                                 // non-first 'white space'
83                                 // -- it then breaks out. No point in carrying on, as we have
84                                 // found our true line end
85                                 for (lineEnd = oldText.length(); lineEnd > 0; --lineEnd) {
86                                         if (oldText.charAt(lineEnd - 1) != '\t'
87                                                         && oldText.charAt(lineEnd - 1) != ' ') {
88                                                 break;
89                                         }
90                                 }
91
92                                 // -- Only replace the line if the lengths are different
93                                 if (lineEnd != oldText.length()) {
94                                         String newText = oldText.substring(0, lineEnd);
95                                         doc.replace(offset, length, newText);
96
97                                         if (offset + length <= cursorOffset) {
98                                                 if (oldText.length() != newText.length()) {
99                                                         cursorOffset -= oldText.length() - newText.length();
100                                                 }
101                                         } else if (offset <= cursorOffset + selectionLength
102                                                         && selectionLength > 0) {
103                                                 selectionLength -= oldText.length() - newText.length();
104                                         } else if (offset + length == cursorOffset + 2) { // Check
105                                                                                                                                                 // if
106                                                                                                                                                 // the
107                                                                                                                                                 // cursor
108                                                                                                                                                 // is at
109                                                                                                                                                 // the
110                                                                                                                                                 // end
111                                                                                                                                                 // of
112                                                                                                                                                 // the
113                                                                                                                                                 // line.
114                                                 cursorOffset -= 2;
115                                         }
116                                 }
117                                 currentLine++;
118                         }
119
120                         TextSelection selection = new TextSelection(doc, cursorOffset,
121                                         selectionLength);
122                         editor.getSelectionProvider().setSelection(selection);
123                 } catch (Exception blx) {
124                         blx.printStackTrace();
125                 }
126         }
127
128         public void selectionChanged(IAction action, ISelection selection) {
129         }
130 }