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Define content clip #386

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merged 3 commits into from
Apr 1, 2022
Merged

Define content clip #386

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b46da08
Define overflow clip
szager-chromium Sep 18, 2019
e89f811
s/overflow clip/content clip/
szager-chromium Sep 2, 2020
062c459
Merge branch 'main' into overflow-clip-dfn
szager-chromium Apr 1, 2022
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8 changes: 6 additions & 2 deletions index.bs
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Expand Up @@ -60,6 +60,8 @@ urlPrefix: https://drafts.csswg.org/cssom-view-1/
url: #pinch-zoom; type:dfn; text: pinch zoom
urlPrefix: https://drafts.csswg.org/css2/visuren.html
url: #viewport; type:dfn; text: viewport
urlPrefix: https://drafts.csswg.org/css-overflow-3/
url: #overflow-properties; type:dfn; text: overflow properties
</pre>

<pre class="link-defaults">
Expand Down Expand Up @@ -305,6 +307,8 @@ or else the <a>top-level browsing context</a>'s {{document}} node
(referred to as the <dfn for="IntersectionObserver">implicit root</dfn>) if
the {{IntersectionObserver/root}} attribute is <code>null</code>.

An {{Element}} is defined as having a <dfn for="IntersectionObserver">content clip</dfn> if its computed style has <a>overflow properties</a> that cause its content to be clipped to the element's padding edge.
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The <dfn for=IntersectionObserver>root intersection rectangle</dfn>
for an {{IntersectionObserver}}
is the rectangle we'll use to check against the targets.
Expand All @@ -316,7 +320,7 @@ is the rectangle we'll use to check against the targets.
<dt>If the <a>intersection root</a> is a {{document}},
<dd>it's the size of the {{document}}'s <a>viewport</a> (note that this processing step can only be reached if the {{document}} is <a>fully active</a>).

<dt>Otherwise, if the <a>intersection root</a> has an overflow clip,
<dt>Otherwise, if the <a>intersection root</a> has a <a>content clip</a>,
<dd>it's the element's <a>content area</a>.

<dt>Otherwise,
Expand Down Expand Up @@ -592,7 +596,7 @@ run these steps:
of the {{document}}, and update |container| to be
the <a>browsing context container</a> of |container|.
2. Map |intersectionRect| to the coordinate space of |container|.
3. If |container| has overflow clipping or a css <a>clip-path</a> property,
3. If |container| has a <a>content clip</a> or a css <a>clip-path</a> property,
update |intersectionRect| by applying |container|'s clip.
4. If |container| is the root element of a <a>browsing context</a>,
update |container| to be the <a>browsing context</a>'s {{document}};
Expand Down