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Auto merge of #12813 - emilio:hit-test, r=notriddle

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dom: getElementsFromPoint does the hit testing on viewport coordinates.

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---
<!-- Thank you for contributing to Servo! Please replace each `[ ]` by `[X]` when the step is complete, and replace `__` with appropriate data: -->
- [x] `./mach build -d` does not report any errors
- [x] `./mach test-tidy` does not report any errors

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- [x] There are tests for these changes OR

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We got this wrong (I think it wasn't my fault actually), I was just writing a test for #12777 when I found this.

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This commit is contained in:
bors-servo 2016-08-11 05:34:27 -05:00 • committed by GitHub
commit 4cefbcc949
4 changed files with 56 additions and 6 deletions
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4
components/layout/query.rs
View file

@ -148,7 +148,9 @@ impl LayoutRPC for LayoutRPCImpl {
let result = match rw_data.display_list {
None => panic!("Tried to hit test without a DisplayList"),
Some(ref display_list) => {
display_list.hit_test(&page_point, &client_point, &rw_data.stacking_context_scroll_offsets)
display_list.hit_test(&page_point,
&client_point,
&rw_data.stacking_context_scroll_offsets)
}
};

10
components/script/dom/document.rs
View file

@ -1583,12 +1583,12 @@ impl Document {
self.browsing_context.is_none() || !url_has_network_scheme(&self.url)
}
pub fn nodes_from_point(&self, page_point: &Point2D<f32>) -> Vec<UntrustedNodeAddress> {
let client_point =
Point2D::new(page_point.x - self.window.PageXOffset() as f32,
page_point.y - self.window.PageYOffset() as f32);
pub fn nodes_from_point(&self, client_point: &Point2D<f32>) -> Vec<UntrustedNodeAddress> {
let page_point =
Point2D::new(client_point.x + self.window.PageXOffset() as f32,
client_point.y + self.window.PageYOffset() as f32);
self.window.layout().nodes_from_point(*page_point, client_point)
self.window.layout().nodes_from_point(page_point, *client_point)
}
}

6
tests/wpt/mozilla/meta/MANIFEST.json
View file

@ -6660,6 +6660,12 @@
"url": "/_mozilla/mozilla/global.html"
}
],
"mozilla/hit_test_pos_fixed.html": [
{
"path": "mozilla/hit_test_pos_fixed.html",
"url": "/_mozilla/mozilla/hit_test_pos_fixed.html"
}
],
"mozilla/htmlcollection.html": [
{
"path": "mozilla/htmlcollection.html",

42
tests/wpt/mozilla/tests/mozilla/hit_test_pos_fixed.html Normal file
View file

@ -0,0 +1,42 @@
<!doctype html>
<meta charset="utf-8">
<title>Hit-test of an element with position: fixed should discard scroll offset</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<style>
html, body { margin: 0; padding: 0; }
.hitme {
position: fixed;
left: 0;
top: 0;
width: 100px;
height: 100px;
background: blue;
}
.hitme:hover { background: green }
.container {
width: 100%;
background: red;
/* Ensure we can scroll */
height: 2000px;
/* FIXME: Uncomment when servo supports this properly
height: calc(100vh + 200px); */
}
</style>
<div class="container">
<div class="hitme"></div>
</div>
<script>
async_test(function(t) {
window.onload = t.step_func(function() {
window.scrollTo(0, 200);
var elements = document.elementsFromPoint(10, 10);
assert_true(elements.length > 0, "Should be elements");
assert_true(elements[0].className == "hitme",
"should be able to hit the fixed-positioned element");
t.done();
});
});
</script>