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LibWeb: Update layout in HTMLElement.offset{Width,Height}

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If we don't do this, we may be returning stale values.
This commit is contained in:
Andreas Kling 2022-04-10 20:38:16 +02:00
parent bb17f74fb1
commit 60ec006265
1 changed files with 22 additions and 6 deletions
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28
Userland/Libraries/LibWeb/HTML/HTMLElement.cpp
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@ -149,17 +149,33 @@ int HTMLElement::offset_left() const
// https://drafts.csswg.org/cssom-view/#dom-htmlelement-offsetwidth
int HTMLElement::offset_width() const
{
if (auto* paint_box = this->paint_box())
return paint_box->border_box_width();
return 0;
// NOTE: Ensure that layout is up-to-date before looking at metrics.
const_cast<DOM::Document&>(document()).update_layout();
// 1. If the element does not have any associated CSS layout box return zero and terminate this algorithm.
if (!paint_box())
return 0;
// 2. Return the width of the axis-aligned bounding box of the border boxes of all fragments generated by the element’s principal box,
// ignoring any transforms that apply to the element and its ancestors.
// FIXME: Account for inline boxes.
return paint_box()->border_box_width();
}
// https://drafts.csswg.org/cssom-view/#dom-htmlelement-offsetheight
int HTMLElement::offset_height() const
{
if (auto* paint_box = this->paint_box())
return paint_box->border_box_height();
return 0;
// NOTE: Ensure that layout is up-to-date before looking at metrics.
const_cast<DOM::Document&>(document()).update_layout();
// 1. If the element does not have any associated CSS layout box return zero and terminate this algorithm.
if (!paint_box())
return 0;
// 2. Return the height of the axis-aligned bounding box of the border boxes of all fragments generated by the element’s principal box,
// ignoring any transforms that apply to the element and its ancestors.
// FIXME: Account for inline boxes.
return paint_box()->border_box_height();
}
bool HTMLElement::cannot_navigate() const