[webkit-changes] [WebKit/WebKit] 0ef637: [css-contain-intrinsic-size] Introduce last rememb...

[cathiechen]

  Branch: refs/heads/main
  Home:   https://github.com/WebKit/WebKit
  Commit: 0ef6378c4923a62d3ea1cf172308b9a8ffd2431e
      https://github.com/WebKit/WebKit/commit/0ef6378c4923a62d3ea1cf172308b9a8ffd2431e
  Author: Cathie Chen <cathiechen at igalia.com>
  Date:   2022-12-21 (Wed, 21 Dec 2022)

  Changed paths:
    M Source/WebCore/dom/Element.cpp
    M Source/WebCore/dom/Element.h
    M Source/WebCore/dom/ElementRareData.cpp
    M Source/WebCore/dom/ElementRareData.h
    M Source/WebCore/rendering/RenderBox.cpp

  Log Message:
  -----------
  [css-contain-intrinsic-size] Introduce last remembered size to Element
https://bugs.webkit.org/show_bug.cgi?id=248998

Reviewed by Cameron McCormack.

Per[1], when contain-intrinsic-size is with the auto-length value, the last remembered size could be its explicit intrinsic inner size.
This patch introduce last remembered size to Element, and the work related to ResizeObserver will be done in the follow-up patches.

[1] https://w3c.github.io/csswg-drafts/css-sizing-4/#valdef-contain-intrinsic-width-auto-length

* Source/WebCore/dom/Element.cpp:
(WebCore::Element::lastRememberedSize const):
(WebCore::Element::setLastRememberedSize):
(WebCore::Element::clearLastRememberedSize):
* Source/WebCore/dom/Element.h:
* Source/WebCore/dom/ElementRareData.cpp:
* Source/WebCore/dom/ElementRareData.h:
(WebCore::ElementRareData::lastRememberedSize const): The lastRememberedSize is a RefPtr of ResizeObserverSize, and is stored it in ElementRareData.
(WebCore::ElementRareData::setLastRememberedSize):
(WebCore::ElementRareData::clearLastRememberedSize):
(WebCore::ElementRareData::useTypes const):
* Source/WebCore/rendering/RenderBox.cpp:
(WebCore::RenderBox::explicitIntrinsicInnerWidth const): Handle AutoAndLength and use lastRememberedSize if exist.
(WebCore::RenderBox::explicitIntrinsicInnerHeight const):

Canonical link: https://commits.webkit.org/258183@main