Autosize should use documentRect height instead of scrollHeight

https://bugs.webkit.org/show_bug.cgi?id=112770

Reviewed by David Levin.

Autosizing fails to compute the correct height if the root element is very
small but the document has significant overflow.

No new tests; autosizing is not currently exposed in a testable way on Mac.

* page/FrameView.cpp:
(WebCore::FrameView::autoSizeIfEnabled):


Canonical link: https://commits.webkit.org/131160@main
git-svn-id: https://svn.webkit.org/repository/webkit/trunk@146373 268f45cc-cd09-0410-ab3c-d52691b4dbfc

Source/WebCore/ChangeLog

@@ -1,3 +1,18 @@
+2013-03-20  Tim Horton  <timothy_horton@apple.com>
+
+        Autosize should use documentRect height instead of scrollHeight
+        https://bugs.webkit.org/show_bug.cgi?id=112770
+
+        Reviewed by David Levin.
+
+        Autosizing fails to compute the correct height if the root element is very
+        small but the document has significant overflow.
+
+        No new tests; autosizing is not currently exposed in a testable way on Mac.
+
+        * page/FrameView.cpp:
+        (WebCore::FrameView::autoSizeIfEnabled):
+
 2013-03-20  Julien Chaffraix  <jchaffraix@webkit.org>
 
         [CSS Grid Layout] Improper repainting when grid item change their position

Source/WebCore/page/FrameView.cpp

@@ -2723,10 +2723,6 @@ void FrameView::autoSizeIfEnabled()
     if (!documentView || !documentElement)
         return;
 
-    RenderBox* documentRenderBox = documentElement->renderBox();
-    if (!documentRenderBox)
-        return;
-
     // If this is the first time we run autosize, start from small height and
     // allow it to grow.
     if (!m_didRunAutosize)
@@ -2740,7 +2736,7 @@ void FrameView::autoSizeIfEnabled()
         // Update various sizes including contentsSize, scrollHeight, etc.
         document->updateLayoutIgnorePendingStylesheets();
         int width = documentView->minPreferredLogicalWidth();
-        int height = documentRenderBox->scrollHeight();
+        int height = documentView->documentRect().height();
         IntSize newSize(width, height);
 
         // Check to see if a scrollbar is needed for a given dimension and