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LibWeb: Implement HTMLImageElement x() and y() getters

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These attributes get the image's top left border edge  relative to the
root element's origin.

These methods ignore any transforms.
This commit is contained in:
Tim Ledbetter
2026-01-10 00:06:19 +00:00
committed by Jelle Raaijmakers
parent 52781cc2fd
commit 79a427e1ef
Notes: github-actions[bot] 2026-01-10 23:34:04 +00:00 
Author: https://github.com/tcl3
Commit: https://github.com/LadybirdBrowser/ladybird/commit/79a427e1ef9
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/7408
Reviewed-by: https://github.com/gmta ✅
9 changed files with 142 additions and 8 deletions
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38
Libraries/LibWeb/HTML/HTMLImageElement.cpp
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@@ -305,6 +305,44 @@ unsigned HTMLImageElement::natural_height() const
return 0;
}
// https://drafts.csswg.org/cssom-view/#dom-htmlimageelement-x
int HTMLImageElement::x() const
{
// The x attribute, on getting, must return the scaled x-coordinate of the left border edge of the first box
// associated with the element, relative to the initial containing block origin, ignoring any transforms that apply
// to the element and its ancestors, or zero if there is no box.
const_cast<DOM::Document&>(document()).update_layout(DOM::UpdateLayoutReason::HTMLImageElementX);
auto const* paintable_box = this->paintable_box();
if (!paintable_box)
return 0;
CSSPixels scroll_offset_x = 0;
if (auto enclosing_scroll = paintable_box->enclosing_scroll_frame(); enclosing_scroll)
scroll_offset_x = enclosing_scroll->cumulative_offset().x();
return (paintable_box->absolute_border_box_rect().x() - scroll_offset_x).to_int();
}
// https://drafts.csswg.org/cssom-view/#dom-htmlimageelement-y
int HTMLImageElement::y() const
{
// The y attribute, on getting, must return the scaled y-coordinate of the top border edge of the first box
// associated with the element, relative to the initial containing block origin, ignoring any transforms that apply
// to the element and its ancestors, or zero if there is no box.
const_cast<DOM::Document&>(document()).update_layout(DOM::UpdateLayoutReason::HTMLImageElementY);
auto const* paintable_box = this->paintable_box();
if (!paintable_box)
return 0;
CSSPixels scroll_offset_y = 0;
if (auto enclosing_scroll = paintable_box->enclosing_scroll_frame(); enclosing_scroll)
scroll_offset_y = enclosing_scroll->cumulative_offset().y();
return (paintable_box->absolute_border_box_rect().y() - scroll_offset_y).to_int();
}
// https://html.spec.whatwg.org/multipage/embedded-content.html#dom-img-complete
bool HTMLImageElement::complete() const
{