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Merge 1921bba601 into 001df24935

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Psychpsyo 2024-11-21 14:29:44 +01:00 committed by GitHub
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3 changed files with 58 additions and 4 deletions
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39
Libraries/LibWeb/Page/EventHandler.cpp
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@ -136,13 +136,44 @@ static Gfx::StandardCursor cursor_css_to_gfx(Optional<CSS::Cursor> cursor)
}
}
// https://drafts.csswg.org/cssom-view/#dom-mouseevent-offsetx
static CSSPixelPoint compute_mouse_event_offset(CSSPixelPoint position, Layout::Node const& layout_node)
{
auto top_left_of_layout_node = layout_node.first_paintable()->box_type_agnostic_position();
return {
position.x() - top_left_of_layout_node.x(),
position.y() - top_left_of_layout_node.y()
// If the event’s dispatch flag is set,
// FIXME: Is this guaranteed to be dispatched?
// return the x-coordinate of the position where the event occurred,
Gfx::Point<float> precision_offset = {
position.x().to_double(),
position.y().to_double()
};
// ignoring the transforms that apply to the element and its ancestors,
if (layout_node.has_css_transform()) {
auto const& paintable_box = layout_node.dom_node()->paintable_box();
auto const affine_transform = Gfx::extract_2d_affine_transform(paintable_box->transform().inverse());
auto const& origin = paintable_box->transform_origin();
Gfx::Point<float> const precision_origin = {
origin.x().to_double(),
origin.y().to_double()
};
precision_offset.translate_by(-precision_origin);
precision_offset.transform_by(affine_transform);
precision_offset.translate_by(precision_origin);
}
// relative to the origin of the padding edge of the target node
auto const top_left_of_layout_node = layout_node.first_paintable()->box_type_agnostic_position();
CSSPixelPoint offset = {
CSSPixels(precision_offset.x()),
CSSPixels(precision_offset.y())
};
offset -= top_left_of_layout_node;
// and terminate these steps.
return offset;
}
EventHandler::EventHandler(Badge<HTML::Navigable>, HTML::Navigable& navigable)

2
Tests/LibWeb/Text/expected/CSSOMView/mouse-event-offset-values.txt Normal file
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@ -0,0 +1,2 @@
offsetX: 45.75
offsetY: 57.078125

21
Tests/LibWeb/Text/input/CSSOMView/mouse-event-offset-values.html Normal file
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@ -0,0 +1,21 @@
<!DOCTYPE html>
<style>
div {
width: 100px;
height: 100px;
background-color: gray;
transform: rotate(45deg);
}
</style>
<div onClick="
println(`offsetX: ${event.offsetX}`);
println(`offsetY: ${event.offsetY}`);
"></div>
<script src="../include.js"></script>
<script>
test(() => {
internals.click(50, 60);
});
</script>