diff options
Diffstat (limited to 'javax/swing/text/PlainView.java')
| -rw-r--r-- | javax/swing/text/PlainView.java | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/javax/swing/text/PlainView.java b/javax/swing/text/PlainView.java index 5d0ce4a37..e048d5f71 100644 --- a/javax/swing/text/PlainView.java +++ b/javax/swing/text/PlainView.java @@ -280,7 +280,6 @@ public class PlainView extends View implements TabExpander // FIXME: Text may be scrolled. Document document = textComponent.getDocument(); Element root = getElement(); - int y = rect.y + metrics.getAscent(); int height = metrics.getHeight(); // For layered highlighters we need to paint the layered highlights @@ -292,7 +291,16 @@ public class PlainView extends View implements TabExpander int count = root.getElementCount(); - for (int i = 0; i < count; i++) + // Determine first and last line inside the clip. + Rectangle clip = g.getClipBounds(); + SwingUtilities.computeIntersection(rect.x, rect.y, rect.width, rect.height, + clip); + int line0 = (clip.y - rect.y) / height; + line0 = Math.max(0, Math.min(line0, count - 1)); + int line1 = (clip.y + clip.height - rect.y) / height; + line1 = Math.max(0, Math.min(line1, count - 1)); + int y = rect.y + metrics.getAscent() + height * line0; + for (int i = line0; i <= line1; i++) { if (hl != null) { |