Title: [166394] trunk/Source/WebCore
Revision
166394
Author
benja...@webkit.org
Date
2014-03-27 20:50:48 -0700 (Thu, 27 Mar 2014)

Log Message

[iOS][WK2] Adjust the tile coverage on the scrollview's edges
https://bugs.webkit.org/show_bug.cgi?id=130884

Patch by Benjamin Poulain <bpoul...@apple.com> on 2014-03-27
Reviewed by Dan Bernstein.

* platform/ios/ScrollViewIOS.mm:
(WebCore::ScrollView::computeCoverageRect):
Pull back the future rect inside the contentRect if it goes outside.
There is no point in retiling for rubberbanding and the extra tiles should be always be
on the opposite side to the edges.

Modified Paths

Diff

Modified: trunk/Source/WebCore/ChangeLog (166393 => 166394)


--- trunk/Source/WebCore/ChangeLog	2014-03-28 02:46:06 UTC (rev 166393)
+++ trunk/Source/WebCore/ChangeLog	2014-03-28 03:50:48 UTC (rev 166394)
@@ -1,3 +1,16 @@
+2014-03-27  Benjamin Poulain  <bpoul...@apple.com>
+
+        [iOS][WK2] Adjust the tile coverage on the scrollview's edges
+        https://bugs.webkit.org/show_bug.cgi?id=130884
+
+        Reviewed by Dan Bernstein.
+
+        * platform/ios/ScrollViewIOS.mm:
+        (WebCore::ScrollView::computeCoverageRect):
+        Pull back the future rect inside the contentRect if it goes outside.
+        There is no point in retiling for rubberbanding and the extra tiles should be always be
+        on the opposite side to the edges.
+
 2014-03-27  Joseph Pecoraro  <pecor...@apple.com>
 
         Remove unused LocaleMac::create method

Modified: trunk/Source/WebCore/platform/ios/ScrollViewIOS.mm (166393 => 166394)


--- trunk/Source/WebCore/platform/ios/ScrollViewIOS.mm	2014-03-28 02:46:06 UTC (rev 166393)
+++ trunk/Source/WebCore/platform/ios/ScrollViewIOS.mm	2014-03-28 03:50:48 UTC (rev 166394)
@@ -140,22 +140,32 @@
     if (m_horizontalVelocity) {
         futureRect.setWidth(futureRect.width() + horizontalMargin);
         if (m_horizontalVelocity < 0)
-            futureRect.setX(std::max(futureRect.x() - horizontalMargin, 0.));
+            futureRect.setX(futureRect.x() - horizontalMargin);
     }
 
     if (m_verticalVelocity) {
         futureRect.setHeight(futureRect.height() + verticalMargin);
         if (m_verticalVelocity < 0)
-            futureRect.setY(std::max(futureRect.y() - verticalMargin, 0.));
+            futureRect.setY(futureRect.y() - verticalMargin);
     }
 
     if (m_scaleChangeRate <= 0 && !m_horizontalVelocity && !m_verticalVelocity) {
         futureRect.setWidth(futureRect.width() + horizontalMargin);
         futureRect.setHeight(futureRect.height() + verticalMargin);
-        futureRect.setX(std::max(futureRect.x() - horizontalMargin / 2, 0.));
-        futureRect.setY(std::max(futureRect.y() - verticalMargin / 2, 0.));
+        futureRect.setX(futureRect.x() - horizontalMargin / 2);
+        futureRect.setY(futureRect.y() - verticalMargin / 2);
     }
 
+    IntSize contentSize = contentsSize();
+    if (futureRect.maxX() > contentSize.width())
+        futureRect.setX(contentSize.width() - futureRect.width());
+    if (futureRect.maxY() > contentSize.height())
+        futureRect.setY(contentSize.height() - futureRect.height());
+    if (futureRect.x() < 0)
+        futureRect.setX(0);
+    if (futureRect.y() < 0)
+        futureRect.setY(0);
+
     return futureRect;
 }
 
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