Bug 1067728 - Part 3 - Expose FindNearestCommonAncestorFrame. r=roc

dothq · Dec 10, 2014 · 9ce9133 · 9ce9133
1 parent 048aed1
commit 9ce9133
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Showing 2 changed files with 9 additions and 2 deletions.
diff --git a/layout/base/nsLayoutUtils.cpp b/layout/base/nsLayoutUtils.cpp
@@ -2295,8 +2295,8 @@ nsLayoutUtils::GetTransformToAncestorScale(nsIFrame* aFrame)
 }
 
 
-static nsIFrame*
-FindNearestCommonAncestorFrame(nsIFrame* aFrame1, nsIFrame* aFrame2)
+nsIFrame*
+nsLayoutUtils::FindNearestCommonAncestorFrame(nsIFrame* aFrame1, nsIFrame* aFrame2)
 {
   nsAutoTArray<nsIFrame*,100> ancestors1;
   nsAutoTArray<nsIFrame*,100> ancestors2;

diff --git a/layout/base/nsLayoutUtils.h b/layout/base/nsLayoutUtils.h
@@ -794,6 +794,13 @@ class nsLayoutUtils
    */
   static gfxSize GetTransformToAncestorScale(nsIFrame* aFrame);
 
+  /**
+   * Find the nearest common ancestor frame for aFrame1 and aFrame2. The
+   * ancestor frame could be cross-doc.
+   */
+  static nsIFrame* FindNearestCommonAncestorFrame(nsIFrame* aFrame1,
+                                                  nsIFrame* aFrame2);
+
   /**
    * Transforms a list of CSSPoints from aFromFrame to aToFrame, taking into
    * account all relevant transformations on the frames up to (but excluding)