Skip to content

[css-view-transitions-1] Display live image when element is outside the snapshot containing block in old state #10587

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Closed
wants to merge 5 commits into from
Closed

[css-view-transitions-1] Display live image when element is outside the snapshot containing block in old state #10587

Changes from all commits
Commits
Show all changes
5 commits
Select commit Hold shift + click to select a range
dd73e32
[css-view-transitions-1] Display live image when old content is outsi…
noamr Jul 17, 2024
5574fd5
Account for null
noamr Jul 17, 2024
0070f5e
Use bounding box
noamr Jul 17, 2024
a17eee8
Refactor to use boolean instead of variant
noamr Jul 17, 2024
cab151d
Apply nit
noamr Jul 19, 2024
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
42 changes: 31 additions & 11 deletions css-view-transitions-1/Overview.bs
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -1172,7 +1172,10 @@ urlPrefix: https://wicg.github.io/navigation-api/; type: interface;

<dl dfn-for="captured element">
: <dfn>old image</dfn>
:: an 2D bitmap or null. Initially null.
:: a 2D bitmap, or null. Initially null.

: <dfn>should generate old pseudo</dfn>
:: a boolean, initially false.

: <dfn>old width</dfn>
: <dfn>old height</dfn>
Expand Down Expand Up @@ -1368,11 +1371,13 @@ urlPrefix: https://wicg.github.io/navigation-api/; type: interface;

1. Let |capture| be a new [=captured element=] struct.

1. Set |capture|'s [=old image=] to the result of [=capturing the image=] of |element|.
1. Set |capture|'s [=should generate old pseudo=] to true.

1. Let |originalRect| be [=snapshot containing block=] if |element| is the [=document element=],
otherwise, the element|'s [=border box=].

1. If |element|'s [=ink overflow rectangle=] intersects with [=snapshot containing block=], then set |capture|'s [=old image=] to the result of [=capturing the image=] of |element|.

1. Set |capture|'s [=captured element/old width=] to |originalRect|'s {{DOMRect/width}}.

1. Set |capture|'s [=captured element/old height=] to |originalRect|'s {{DOMRect/height}}.
Expand Down Expand Up @@ -1466,12 +1471,14 @@ urlPrefix: https://wicg.github.io/navigation-api/; type: interface;

1. Append |imagePair| to |group|.

1. If |capturedElement|'s [=captured element/old image=] is not null, then:
1. If |capturedElement|'s [=should generate old pseudo=] is true, then:

1. Let |old| be a new ''::view-transition-old()'',
with its [=view transition name=] set to |transitionName|,
displaying |capturedElement|'s [=captured element/old image=]
as its [=replaced element|replaced=] content.
with its [=view transition name=] set to |transitionName|.

1. If |capturedElement|'s [=captured element/old image=] is not null, then
set |old|'s [=replaced element|replaced=] content to |capturedElement|'s
[=captured element/old image=].

1. Append |old| to |imagePair|.

Expand All @@ -1484,7 +1491,7 @@ urlPrefix: https://wicg.github.io/navigation-api/; type: interface;

1. Append |new| to |imagePair|.

1. If |capturedElement|'s [=captured element/old image=] is null, then:
1. If |capturedElement|'s [=should generate old pseudo=] is false, then:
1. [=Assert=]: |capturedElement|'s [=captured element/new element=] is not null.

1. Set |capturedElement|'s [=captured element/image animation name rule=] to a new {{CSSStyleRule}} representing the following CSS,
Expand All @@ -1500,7 +1507,7 @@ urlPrefix: https://wicg.github.io/navigation-api/; type: interface;
Note: The above code example contains variables to be replaced.

1. If |capturedElement|'s [=captured element/new element=] is null, then:
1. [=Assert=]: |capturedElement|'s [=captured element/old image=] is not null.
1. [=Assert=]: |capturedElement|'s [=should generate old pseudo=] is true.

1. Set |capturedElement|'s [=captured element/image animation name rule=] to a new {{CSSStyleRule}} representing the following CSS,
and append it to |document|'s [=document/dynamic view transition style sheet=]:
Expand All @@ -1514,8 +1521,8 @@ urlPrefix: https://wicg.github.io/navigation-api/; type: interface;

Note: The above code example contains variables to be replaced.

1. If both of |capturedElement|'s [=captured element/old image=] and [=captured element/new element=]
are not null, then:
1. If [=should generate old pseudo=] is true and [=captured element/new element=]
is not null, then:

1. Let |transform| be |capturedElement|'s [=captured element/old transform=].

Expand Down Expand Up @@ -1903,11 +1910,23 @@ urlPrefix: https://wicg.github.io/navigation-api/; type: interface;

Note: The above code example contains variables to be replaced.

1. Let |liveSnapshot| be null.

1. If |capturedElement|'s [=new element=] is not null, then:

1. Let |new| be the ''::view-transition-new()'' with the [=view transition name=] |transitionName|.

1. Set |new|'s [=replaced element=] content to the result of [=capturing the image=] of |capturedElement|'s [=new element=].
1. Set |liveSnapshot| to the result of [=capturing the image=] of |capturedElement|'s [=new element=].

1. Set |new|'s [=replaced element=] content to |liveSnapshot|.

1. If |capturedElement|'s [=old image=] is null, and |capturedElement|'s [=should generate old pseudo=] is true, then:

1. Let |old| be the ''::view-transition-old()'' with the [=view transition name=] |transitionName|.

1. Set |old|'s [=replaced element=] content to |liveSnapshot|.

Note: In case of an exit transition of an offscreen element, the group would have no content.

This algorithm must be executed to update styles in [=user-agent origin=] if its effects can be observed by a web API.

Expand Down Expand Up @@ -1979,6 +1998,7 @@ Changes from <a href="https://www.w3.org/TR/2023/WD-css-view-transitions-1-20230
* Fix algorithm for dispatching updateDOMCallback promise.
* Scope view transition names to matching tree context. See <a href="https://github.com/w3c/csswg-drafts/issues/10145">issue 10145</a>.
* Fix scoping to match name instead of element. See <a href="https://github.com/w3c/csswg-drafts/issues/10145">issue 10145</a>.
* Show live contents if the old element is captured when outside the viewport. See <a href="https://github.com/w3c/csswg-drafts/issues/8282">issue 8282</a>.

<h3 id="changes-since-2022-05-25">
Changes from <a href="https://www.w3.org/TR/2023/WD-css-view-transitions-1-20230525/">2022-05-25 Working Draft</a>
Expand Down