+++ /dev/null
-package net.sourceforge.phpeclipse.phpeditor;
-
-/*
- * (c) Copyright IBM Corp. 2000, 2001.
- * All Rights Reserved.
- */
-
-import org.eclipse.jface.text.BadLocationException;
-import org.eclipse.jface.text.IDocument;
-import org.eclipse.jface.text.Position;
-import org.eclipse.jface.text.source.ISourceViewer;
-import org.eclipse.swt.custom.LineBackgroundEvent;
-import org.eclipse.swt.custom.LineBackgroundListener;
-import org.eclipse.swt.custom.StyledText;
-import org.eclipse.swt.graphics.Color;
-import org.eclipse.swt.graphics.Point;
-
-public class LinePainter implements IPainter, LineBackgroundListener {
-
- private final ISourceViewer fViewer;
- private Color fHighlightColor;
- private IPositionManager fPositionManager;
-
- // positions to keep track of beginning and end of line to be painted or cleared
- private Position fCurrentLine= new Position(0, 0);
- private Position fLastLine= new Position(0, 0);
- // used to keep track of the last line painted
- private int fLastLineNumber= -1;
- private boolean fIsActive;
-
- public LinePainter(ISourceViewer sourceViewer) {
- fViewer= sourceViewer;
- }
-
- public void setHighlightColor(Color highlightColor) {
- fHighlightColor= highlightColor;
- }
-
- /*
- * @see LineBackgroundListener#lineGetBackground(LineBackgroundEvent)
- */
- public void lineGetBackground(LineBackgroundEvent event) {
- // don't use cached line information because of asynch painting
-
- StyledText textWidget= fViewer.getTextWidget();
- if (textWidget != null) {
-
- int caret= textWidget.getCaretOffset();
- int length= event.lineText.length();
-
- if (event.lineOffset <= caret && caret <= event.lineOffset + length)
- event.lineBackground= fHighlightColor;
- else
- event.lineBackground= textWidget.getBackground();
- }
- }
-
- private boolean updateHighlightLine() {
- try {
-
- IDocument document= fViewer.getDocument();
-
- int offset= fViewer.getTextWidget().getCaretOffset() + fViewer.getVisibleRegion().getOffset();
- int lineNumber= document.getLineOfOffset(offset);
-
- // redraw if the current line number is different from the last line number we painted
- // initially fLastLineNumber is -1
- if (lineNumber != fLastLineNumber) {
-
- fLastLine.offset= fCurrentLine.offset;
- fLastLine.length= fCurrentLine.length;
- fLastLine.isDeleted= fCurrentLine.isDeleted;
-
- fCurrentLine.isDeleted= false;
- fCurrentLine.offset= document.getLineOffset(lineNumber);
- if (lineNumber == document.getNumberOfLines() - 1)
- fCurrentLine.length= document.getLength() - fCurrentLine.offset;
- else
- fCurrentLine.length= document.getLineOffset(lineNumber + 1) - fCurrentLine.offset;
-
- fLastLineNumber= lineNumber;
- return true;
-
- }
-
- } catch (BadLocationException e) {
- }
-
- return false;
- }
-
- private void drawHighlightLine(Position position, int visibleOffset) {
- StyledText textWidget= fViewer.getTextWidget();
-
- // if the position that is about to be drawn was deleted then we can't
- if (position.isDeleted())
- return;
-
- int delta= position.offset - visibleOffset;
- if (0 <= delta && delta <= fViewer.getVisibleRegion().getLength()) {
- Point upperLeft= textWidget.getLocationAtOffset(delta);
- int width= textWidget.getClientArea().width + textWidget.getHorizontalPixel();
- int height= textWidget.getLineHeight();
- textWidget.redraw(upperLeft.x, upperLeft.y, width, height, false);
- }
- }
-
- /*
- * @see IPainter#deactivate(boolean)
- */
- public void deactivate(boolean redraw) {
- if (fIsActive) {
- fIsActive= false;
-
- /* on turning off the feature one has to paint the currently
- * highlighted line with the standard background color
- */
- if (redraw)
- drawHighlightLine(fCurrentLine, fViewer.getVisibleRegion().getOffset());
-
- fViewer.getTextWidget().removeLineBackgroundListener(this);
-
- if (fPositionManager != null)
- fPositionManager.removeManagedPosition(fCurrentLine);
-
- fLastLineNumber= -1;
- }
- }
-
- /*
- * @see IPainter#dispose()
- */
- public void dispose() {
- }
-
- /*
- * @see IPainter#paint(int)
- */
- public void paint(int reason) {
-
- // check selection
- Point selection= fViewer.getTextWidget().getSelectionRange();
- if (selection.y > 0) {
- deactivate(true);
- return;
- }
-
- // initialization
- if (!fIsActive) {
- fViewer.getTextWidget().addLineBackgroundListener(this);
- fPositionManager.addManagedPosition(fCurrentLine);
- fIsActive= true;
- }
-
- //redraw line highlight only if it hasn't been drawn yet on the respective line
- if (updateHighlightLine()) {
- // used to handle segmented view of source files
- int visibleRegionOffset= fViewer.getVisibleRegion().getOffset();
- // clear last line
- drawHighlightLine(fLastLine, visibleRegionOffset);
- // draw new line
- drawHighlightLine(fCurrentLine, visibleRegionOffset);
- }
- }
-
- /*
- * @see IPainter#setPositionManager(IPositionManager)
- */
- public void setPositionManager(IPositionManager manager) {
- fPositionManager = manager;
- }
-}
\ No newline at end of file
git://secure.phpeclipse.com / phpeclipse.git / blobdiff