/jEdit/tags/jedit-4-3-pre5/org/gjt/sp/jedit/textarea/Anchor.java
Java | 94 lines | 57 code | 8 blank | 29 comment | 8 complexity | 07e17acfadaf4e03dec61f1933d7bbf6 MD5 | raw file
Possible License(s): BSD-3-Clause, AGPL-1.0, Apache-2.0, LGPL-2.0, LGPL-3.0, GPL-2.0, CC-BY-SA-3.0, LGPL-2.1, GPL-3.0, MPL-2.0-no-copyleft-exception, IPL-1.0
- /*
- * Anchor.java - A base point for physical line <-> screen line conversion
- * :tabSize=8:indentSize=8:noTabs=false:
- * :folding=explicit:collapseFolds=1:
- *
- * Copyright (C) 2005 Slava Pestov
- *
- * 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 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 org.gjt.sp.jedit.textarea;
- /**
- * A base point for physical line/screen line conversion.
- */
- abstract class Anchor
- {
- DisplayManager displayManager;
- JEditTextArea textArea;
- int physicalLine;
- int scrollLine;
- boolean callChanged;
- boolean callReset;
- //{{{ Anchor constructor
- Anchor(DisplayManager displayManager,
- JEditTextArea textArea)
- {
- this.displayManager = displayManager;
- this.textArea = textArea;
- } //}}}
- abstract void reset();
- abstract void changed();
- //{{{ toString() method
- public String toString()
- {
- return getClass().getName() + "[" + physicalLine + ","
- + scrollLine + "]";
- } //}}}
- //{{{ contentInserted() method
- void contentInserted(int startLine, int numLines)
- {
- if(this.physicalLine >= startLine)
- {
- if(this.physicalLine != startLine)
- this.physicalLine += numLines;
- this.callChanged = true;
- }
- } //}}}
- //{{{ preContentRemoved() method
- void preContentRemoved(int startLine, int numLines)
- {
- if(this.physicalLine >= startLine)
- {
- if(this.physicalLine == startLine)
- this.callChanged = true;
- else
- {
- int end = Math.min(startLine + numLines,
- this.physicalLine);
- for(int i = startLine + 1; i <= end; i++)
- {
- //XXX
- if(displayManager.isLineVisible(i - 1))
- {
- this.scrollLine -=
- displayManager
- .screenLineMgr
- .getScreenLineCount(i);
- }
- }
- this.physicalLine -= (end - startLine);
- this.callChanged = true;
- }
- }
- } //}}}
- }