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Arduino/app/EditorListener.java
2005-08-25 21:06:28 +00:00

173 lines
5.0 KiB
Java

/* -*- mode: jde; c-basic-offset: 2; indent-tabs-mode: nil -*- */
/*
Part of the Processing project - http://processing.org
Copyright (c) 2004-05 Ben Fry and Casey Reas
Copyright (c) 2001-04 Massachusetts Institute of Technology
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software Foundation,
Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
package processing.app;
import processing.app.syntax.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.text.*;
import javax.swing.event.*;
/**
* Filters key events for tab expansion/indent/etc.
*/
public class EditorListener {
Editor editor;
JEditTextArea textarea;
boolean externalEditor;
boolean expandTabs;
String tabString;
boolean autoIndent;
int selectionStart, selectionEnd;
int position;
public EditorListener(Editor editor, JEditTextArea textarea) {
this.editor = editor;
this.textarea = textarea;
// let him know that i'm leechin'
textarea.editorListener = this;
applyPreferences();
}
public void applyPreferences() {
expandTabs = Preferences.getBoolean("editor.tabs.expand");
int tabSize = Preferences.getInteger("editor.tabs.size");
tabString = Editor.EMPTY.substring(0, tabSize);
autoIndent = Preferences.getBoolean("editor.indent");
externalEditor = Preferences.getBoolean("editor.external");
}
//public void setExternalEditor(boolean externalEditor) {
//this.externalEditor = externalEditor;
//}
// called by JEditTextArea inside processKeyEvent
public boolean keyPressed(KeyEvent event) {
// don't do things if the textarea isn't editable
if (externalEditor) return false;
//deselect(); // this is for paren balancing
char c = event.getKeyChar();
int code = event.getKeyCode();
//System.out.println(c + " " + code + " " + event);
//System.out.println();
if ((event.getModifiers() & KeyEvent.META_MASK) != 0) {
//event.consume(); // does nothing
return false;
}
// TODO i don't like these accessors. clean em up later.
if (!editor.sketch.current.modified) {
if ((code == KeyEvent.VK_BACK_SPACE) || (code == KeyEvent.VK_TAB) ||
(code == KeyEvent.VK_ENTER) || ((c >= 32) && (c < 128))) {
editor.sketch.setModified();
}
}
switch ((int) c) {
case 9: // expand tabs
if (expandTabs) {
//tc.replaceSelection(tabString);
textarea.setSelectedText(tabString);
event.consume();
return true;
}
break;
case 10: // auto-indent
case 13:
if (autoIndent) {
char contents[] = textarea.getText().toCharArray();
// this is the position of the caret, if the textarea
// only used a single kind of line ending
int origIndex = textarea.getCaretPosition() - 1;
// walk through the array to the current caret position,
// and count how many weirdo windows line endings there are,
// which would be throwing off the caret position number
int offset = 0;
int realIndex = origIndex;
for (int i = 0; i < realIndex-1; i++) {
if ((contents[i] == 13) && (contents[i+1] == 10)) {
offset++;
realIndex++;
}
}
// back up until \r \r\n or \n.. @#($* cross platform
//System.out.println(origIndex + " offset = " + offset);
origIndex += offset; // ARGH!#(* WINDOWS#@($*
int index = origIndex;
int spaceCount = 0;
boolean finished = false;
while ((index != -1) && (!finished)) {
if ((contents[index] == 10) ||
(contents[index] == 13)) {
finished = true;
index++; // maybe ?
} else {
index--; // new
}
}
while ((index < contents.length) && (index >= 0) &&
(contents[index++] == ' ')) {
spaceCount++;
}
// seems that \r is being inserted anyway
// so no need to insert the platform's line separator
String insertion = "\n" + Editor.EMPTY.substring(0, spaceCount);
//tc.replaceSelection(insertion);
textarea.setSelectedText(insertion);
// microsoft vm version:
//tc.setCaretPosition(oldCarrot + insertion.length() - 1);
// sun vm version:
// tc.setCaretPosition(oldCarrot + insertion.length());
event.consume();
return true;
}
break;
}
return false;
}
}