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gfx: Add a test to account the transform in nested stacking contexts.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,72 @@ | ||
| <!doctype html> | ||
| <meta charset="utf-8"> | ||
| <title>Test: Hit testing works well with nested stacking contexts</title> | ||
| <script src="/resources/testharness.js"></script> | ||
| <script src="/resources/testharnessreport.js"></script> | ||
| <style> | ||
| .outer-sc { | ||
| transform: translate(-50px, -50px); | ||
| position: absolute; | ||
| width: 250px; | ||
| height: 250px; | ||
| top: 250px; | ||
| left: 250px; | ||
| background: blue; | ||
| } | ||
|
|
||
| .outer-sc:hover { | ||
| background: red; | ||
| } | ||
|
|
||
| .inner-sc { | ||
| transform: translate(50px, 50px); | ||
| position: absolute; | ||
| width: 250px; | ||
| height: 250px; | ||
| top: 250px; | ||
| left: 250px; | ||
| background: green; | ||
| } | ||
|
|
||
| .inner-sc:hover { | ||
| background: yellow; | ||
| } | ||
|
|
||
| html, body { margin: 0; padding: 0; } | ||
| </style> | ||
| <div class="outer-sc"> | ||
| <div class="inner-sc"> | ||
| </div> | ||
| </div> | ||
| <script> | ||
| async_test(function(t) { | ||
| window.onload = t.step_func(function() { | ||
| // This should be in the middle of the squares: | ||
| // +-------------+ | ||
| // | | | ||
| // | | | ||
| // | | | ||
| // | | | ||
| // | | | ||
| // +-------------+ | ||
| // . <-- here | ||
| // +-------------+ | ||
| // | | | ||
| // | | | ||
| // | | | ||
| // | | | ||
| // | | | ||
| // +-------------+ | ||
| // | ||
| // If we have forgotten to take into account the nested transformations, | ||
| // then it will report that the inner stacking context is at that point | ||
| // (but obviously shouldn't). | ||
| var points = document.elementsFromPoint(450 + 25, 450 + 25); | ||
| assert_true(points.length > 0, | ||
| "Should report at least one element"); | ||
| assert_true(points[0].className !== "inner-sc", | ||
| "Should not be the inner stacking context"); | ||
| t.done(); | ||
| }) | ||
| }) | ||
| </script> |