diff options
| -rw-r--r-- | org.eclipse.jface.text/src/org/eclipse/jface/text/source/LineNumberRulerColumn.java | 45 |
1 files changed, 27 insertions, 18 deletions
diff --git a/org.eclipse.jface.text/src/org/eclipse/jface/text/source/LineNumberRulerColumn.java b/org.eclipse.jface.text/src/org/eclipse/jface/text/source/LineNumberRulerColumn.java index a35bcd88a8e..808fdbcfe17 100644 --- a/org.eclipse.jface.text/src/org/eclipse/jface/text/source/LineNumberRulerColumn.java +++ b/org.eclipse.jface.text/src/org/eclipse/jface/text/source/LineNumberRulerColumn.java @@ -719,10 +719,7 @@ public class LineNumberRulerColumn implements IVerticalRulerColumn { fBuffer= new Image(fCanvas.getDisplay(), size.x, size.y); } GC bufferGC= new GC(fBuffer); - if (fForeground != null) { - bufferGC.setForeground(fForeground); - } - bufferGC.setBackground(getBackground(fCanvas.getDisplay())); + Image newBuffer= null; try { int topPixel= fCachedTextWidget.getTopPixel(); int bufferY= 0; @@ -766,7 +763,7 @@ public class LineNumberRulerColumn implements IVerticalRulerColumn { * For higher zoom levels (200%), we manually scale the font and drawing coordinates, * and then use getImageData(100) to extract the high-resolution image data. */ ILineRange lines= visibleLines; - Image zoomedBuffer= new Image(fCanvas.getDisplay(), (ImageDataProvider) zoom -> { + newBuffer= new Image(fCanvas.getDisplay(), (ImageDataProvider) zoom -> { fZoom= zoom; internalSetZoom(zoom); int width= size.x * zoom / 100; @@ -786,14 +783,8 @@ public class LineNumberRulerColumn implements IVerticalRulerColumn { fLastZoomedFont= font; } } - gc.setFont(font); - if (fForeground != null) { - gc.setForeground(fForeground); - } try { - gc.setBackground(getBackground(fCanvas.getDisplay())); - gc.fillRectangle(0, 0, width, height); - + initializeGC(gc, font, 0, 0, width, height); doPaint(gc, lines); } finally { gc.dispose(); @@ -804,24 +795,42 @@ public class LineNumberRulerColumn implements IVerticalRulerColumn { gcImage.dispose(); return imageData; }); + bufferGC.drawImage(newBuffer, 0, bufferY, size.x, bufferH, 0, bufferY, size.x, bufferH); + } else if (dy != 0) { + // Some rulers may paint outside the line region. Let them paint in a new image, + // the copy the wanted bits. + newBuffer= new Image(fCanvas.getDisplay(), size.x, size.y); + GC localGC= new GC(newBuffer); try { - bufferGC.drawImage(zoomedBuffer, 0, bufferY, size.x, bufferH, 0, bufferY, size.x, bufferH); + initializeGC(localGC, fCanvas.getFont(), 0, bufferY, size.x, bufferH); + doPaint(localGC, visibleLines); } finally { - zoomedBuffer.dispose(); + localGC.dispose(); } + bufferGC.drawImage(newBuffer, 0, bufferY, size.x, bufferH, 0, bufferY, size.x, bufferH); } else { - // Draw directly into the buffer - bufferGC.setFont(fCanvas.getFont()); - bufferGC.fillRectangle(0, bufferY, size.x, bufferH); - + // We redraw everything; paint directly into the buffer + initializeGC(bufferGC, fCanvas.getFont(), 0, 0, size.x, size.y); doPaint(bufferGC, visibleLines); } } finally { bufferGC.dispose(); + if (newBuffer != null) { + newBuffer.dispose(); + } } dest.drawImage(fBuffer, 0, 0); } + private void initializeGC(GC gc, Font font, int x, int y, int width, int height) { + gc.setFont(font); + if (fForeground != null) { + gc.setForeground(fForeground); + } + gc.setBackground(getBackground(fCanvas.getDisplay())); + gc.fillRectangle(x, y, width, height); + } + /** * This method is not API and it is expected to disappear in Eclipse 4.8. * Subclasses that want to take advantage of the unsupported workaround for bug 516258 |