[Skim-app-commit] SF.net SVN: skim-app:[15237] trunk/SKPresentationView.m

[hofman--- via Skim-app-commit]

Revision: 15237
          http://sourceforge.net/p/skim-app/code/15237
Author:   hofman
Date:     2025-05-19 14:38:57 +0000 (Mon, 19 May 2025)
Log Message:
-----------
Always remove predrawn image when page needs display, redisplay when 
invalidating next page

Modified Paths:
--------------
    trunk/SKPresentationView.m

Modified: trunk/SKPresentationView.m
===================================================================
--- trunk/SKPresentationView.m  2025-05-19 13:57:32 UTC (rev 15236)
+++ trunk/SKPresentationView.m  2025-05-19 14:38:57 UTC (rev 15237)
@@ -464,10 +464,13 @@
 }
 
 - (void)setNeedsDisplayForPage:(PDFPage *)aPage {
+    [self removePredrawnImageAtIndex:[aPage pageIndex]];
     if (page == aPage) {
-        [self removePredrawnImageAtIndex:[aPage pageIndex]];
         [[self class] cancelPreviousPerformRequestsWithTarget:self 
selector:@selector(displayCurrentPage:) object:nil];
         [self performSelector:@selector(displayCurrentPage:) withObject:nil 
afterDelay:0.0];
+    } else if (page && [page pageIndex] + 1 == [aPage pageIndex]) {
+        [[self class] cancelPreviousPerformRequestsWithTarget:self 
selector:@selector(predisplayNextPage) object:nil];
+        [self performSelector:@selector(predisplayNextPage) withObject:nil 
afterDelay:0.0];
     }
 }
 
@@ -498,9 +501,7 @@
     }
 }
 
-- (void)displayCurrentPage:(void (^)(void))completionHandler {
-    [super displayCurrentPage:completionHandler];
-    
+- (void)predisplayNextPage {
     if (page == nil)
         return;
     
@@ -545,6 +546,11 @@
     
 }
 
+- (void)displayCurrentPage:(void (^)(void))completionHandler {
+    [super displayCurrentPage:completionHandler];
+    [self predisplayNextPage];
+}
+
 #pragma mark Accessors
 
 - (BOOL)canBecomeKeyView {

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