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| author | wolfbeast <mcwerewolf@gmail.com> | 2018-12-22 06:30:39 +0100 |
|---|---|---|
| committer | wolfbeast <mcwerewolf@gmail.com> | 2018-12-22 06:30:39 +0100 |
| commit | 107a68cb1d12aa6ed74e4ca414e5f05e4a92c963 (patch) | |
| tree | f734be34f47e6bd927cd49b25cf72514761e4cea /dom/base/DOMIntersectionObserver.cpp | |
| parent | c9d920e9c630fd8b99b863e034742fd3b38e12d3 (diff) | |
| download | UXP-107a68cb1d12aa6ed74e4ca414e5f05e4a92c963.tar UXP-107a68cb1d12aa6ed74e4ca414e5f05e4a92c963.tar.gz UXP-107a68cb1d12aa6ed74e4ca414e5f05e4a92c963.tar.lz UXP-107a68cb1d12aa6ed74e4ca414e5f05e4a92c963.tar.xz UXP-107a68cb1d12aa6ed74e4ca414e5f05e4a92c963.zip | |
Intersection ratio should be 1.0 for zero-area intersections.
Tag #249
Diffstat (limited to 'dom/base/DOMIntersectionObserver.cpp')
| -rw-r--r-- | dom/base/DOMIntersectionObserver.cpp | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/dom/base/DOMIntersectionObserver.cpp b/dom/base/DOMIntersectionObserver.cpp index cb624fb17..0834bc05c 100644 --- a/dom/base/DOMIntersectionObserver.cpp +++ b/dom/base/DOMIntersectionObserver.cpp @@ -411,7 +411,13 @@ DOMIntersectionObserver::Update(nsIDocument* aDocument, DOMHighResTimeStamp time double targetArea = targetRect.width * targetRect.height; double intersectionArea = !intersectionRect ? 0 : intersectionRect->width * intersectionRect->height; - double intersectionRatio = targetArea > 0.0 ? intersectionArea / targetArea : 0.0; + + double intersectionRatio; + if (targetArea > 0.0) { + intersectionRatio = intersectionArea / targetArea; + } else { + intersectionRatio = intersectionRect.isSome() ? 1.0 : 0.0; + } size_t threshold = -1; if (intersectionRatio > 0.0) { |