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avoid unnecessary text layout cache resets on scrolling

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Dmitry Batrak
2017-08-29 16:40:29 +03:00
parent 31cdb5f7fd
commit 25d48f3e57
1 changed files with 10 additions and 1 deletions
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platform/platform-impl/src/com/intellij/openapi/editor/impl/view/EditorView.java
+10 -1
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@@ -524,12 +524,21 @@ public class EditorView implements TextDrawingCallback, Disposable, Dumpable, Hi
private void checkFontRenderContext(FontRenderContext context) {
FontRenderContext oldContext = myFontRenderContext;
setFontRenderContext(context);
if (!myFontRenderContext.equals(oldContext)) {
if (!areEqualContexts(myFontRenderContext, oldContext)) {
myTextLayoutCache.resetToDocumentSize(false);
invalidateFoldRegionLayouts();
}
}
private static boolean areEqualContexts(FontRenderContext c1, FontRenderContext c2) {
if (c1 == c2) return true;
if (c1 == null || c2 == null) return false;
// We ignore fractional metrics aspect of contexts, because we assume it's not changing during editor's lifecycle.
// And it has different values for component graphics (OFF) and component's font metrics (DEFAULT), causing
// unnecessary layout cache resets.
return c1.getTransform().equals(c2.getTransform()) && c1.getAntiAliasingHint().equals(c2.getAntiAliasingHint());
}
LineLayout getFoldRegionLayout(FoldRegion foldRegion) {
LineLayout layout = foldRegion.getUserData(FOLD_REGION_TEXT_LAYOUT);
if (layout == null) {