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Auto merge of #15047 - emilio:click-regression, r=notriddle,emilio

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gfx: Don't mutate the same point multiple times while translating it …

…to other stacking context space.

I don't know how neither review or a test caught this.

r? @pcwalton  or @notriddle

Fixes #15015

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This commit is contained in:
bors-servo 2017-01-16 15:46:05 -08:00 • committed by GitHub
commit a4551d0cee
4 changed files with 51 additions and 15 deletions
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29
components/gfx/display_list/mod.rs
View file

@ -55,11 +55,10 @@ impl DisplayList {
scroll_offsets: &ScrollOffsetMap)
-> Option<usize> {
let mut result = Vec::new();
let mut translated_point = client_point.clone();
let mut traversal = DisplayListTraversal::new(self);
self.text_index_contents(node,
&mut traversal,
&mut translated_point,
client_point,
client_point,
scroll_offsets,
&mut result);
@ -69,30 +68,32 @@ impl DisplayList {
pub fn text_index_contents<'a>(&self,
node: OpaqueNode,
traversal: &mut DisplayListTraversal<'a>,
translated_point: &mut Point2D<Au>,
translated_point: &Point2D<Au>,
client_point: &Point2D<Au>,
scroll_offsets: &ScrollOffsetMap,
result: &mut Vec<usize>) {
while let Some(item) = traversal.next() {
match item {
&DisplayItem::PushStackingContext(ref stacking_context_item) => {
let mut point = *translated_point;
DisplayList::translate_point(&stacking_context_item.stacking_context,
translated_point,
&mut point,
client_point);
self.text_index_contents(node,
traversal,
translated_point,
&point,
client_point,
scroll_offsets,
result);
}
&DisplayItem::PushScrollRoot(ref item) => {
let mut point = *translated_point;
DisplayList::scroll_root(&item.scroll_root,
translated_point,
&mut point,
scroll_offsets);
self.text_index_contents(node,
traversal,
translated_point,
&point,
client_point,
scroll_offsets,
result);
@ -115,7 +116,7 @@ impl DisplayList {
// Return all nodes containing the point of interest, bottommost first, and
// respecting the `pointer-events` CSS property.
pub fn hit_test(&self,
translated_point: &mut Point2D<Au>,
translated_point: &Point2D<Au>,
client_point: &Point2D<Au>,
scroll_offsets: &ScrollOffsetMap)
-> Vec<DisplayItemMetadata> {
@ -131,28 +132,30 @@ impl DisplayList {
pub fn hit_test_contents<'a>(&self,
traversal: &mut DisplayListTraversal<'a>,
translated_point: &mut Point2D<Au>,
translated_point: &Point2D<Au>,
client_point: &Point2D<Au>,
scroll_offsets: &ScrollOffsetMap,
result: &mut Vec<DisplayItemMetadata>) {
while let Some(item) = traversal.next() {
match item {
&DisplayItem::PushStackingContext(ref stacking_context_item) => {
let mut point = *translated_point;
DisplayList::translate_point(&stacking_context_item.stacking_context,
translated_point,
&mut point,
client_point);
self.hit_test_contents(traversal,
translated_point,
&point,
client_point,
scroll_offsets,
result);
}
&DisplayItem::PushScrollRoot(ref item) => {
let mut point = *translated_point;
DisplayList::scroll_root(&item.scroll_root,
translated_point,
&mut point,
scroll_offsets);
self.hit_test_contents(traversal,
translated_point,
&point,
client_point,
scroll_offsets,
result);

4
components/layout/query.rs
View file

@ -141,7 +141,7 @@ impl LayoutRPC for LayoutRPCImpl {
fn nodes_from_point(&self,
page_point: Point2D<f32>,
client_point: Point2D<f32>) -> Vec<UntrustedNodeAddress> {
let mut page_point = Point2D::new(Au::from_f32_px(page_point.x),
let page_point = Point2D::new(Au::from_f32_px(page_point.x),
Au::from_f32_px(page_point.y));
let client_point = Point2D::new(Au::from_f32_px(client_point.x),
Au::from_f32_px(client_point.y));
@ -152,7 +152,7 @@ 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(&mut page_point,
display_list.hit_test(&page_point,
&client_point,
&rw_data.stacking_context_scroll_offsets)
}

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

@ -8432,6 +8432,12 @@
"url": "/_mozilla/mozilla/globals/entry.worker.html"
}
],
"mozilla/hit_test_multiple_sc.html": [
{
"path": "mozilla/hit_test_multiple_sc.html",
"url": "/_mozilla/mozilla/hit_test_multiple_sc.html"
}
],
"mozilla/hit_test_nested_sc.html": [
{
"path": "mozilla/hit_test_nested_sc.html",

27
tests/wpt/mozilla/tests/mozilla/hit_test_multiple_sc.html Normal file
View file

@ -0,0 +1,27 @@
<!doctype html>
<meta charset="utf-8">
<title>Hit testing works for following stacking contexts</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<style>
.stacking-context {
z-index: 100;
opacity: 0.99;
width: 100px;
height: 100px;
background: green;
}
</style>
<div class="stacking-context"></div>
<div class="stacking-context" id="second-sc"></div>
<script>
async_test(function(t) {
window.onload = t.step_func(function() {
var points = document.elementsFromPoint(50, 150);
assert_true(points.length > 0, "Should report at least one element");
assert_true(points[0].id === "second-sc",
"Should be the second stacking context");
t.done();
})
});
</script>