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LibWeb: Follow the spec more precisely in Element::getClientRects()

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Now, `Element::getBoundingClientRect()` implementation depends on
`Element::getClientRects()`, as defined in the specification.
This commit is contained in:
Aliaksandr Kalenik 2024-01-30 11:36:28 +01:00 • committed by Andreas Kling
parent 16f1962f10
commit 768b8415f2
Notes: sideshowbarker 2024-07-18 00:41:35 +09:00
3 changed files with 78 additions and 31 deletions
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85
Userland/Libraries/LibWeb/DOM/Element.cpp
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@ -849,30 +849,36 @@ bool Element::serializes_as_void() const
// https://drafts.csswg.org/cssom-view/#dom-element-getboundingclientrect
JS::NonnullGCPtr<Geometry::DOMRect> Element::get_bounding_client_rect() const
{
// // NOTE: Ensure that layout is up-to-date before looking at metrics.
const_cast<Document&>(document()).update_layout();
VERIFY(document().navigable());
auto viewport_offset = document().navigable()->viewport_scroll_offset();
// 1. Let list be the result of invoking getClientRects() on element.
auto list = get_client_rects();
if (auto const* paintable_box = this->paintable_box()) {
auto absolute_rect = paintable_box->absolute_border_box_rect();
absolute_rect.translate_by(-viewport_offset.x(), -viewport_offset.y());
return Geometry::DOMRect::create(realm(), absolute_rect.to_type<float>());
// 2. If the list is empty return a DOMRect object whose x, y, width and height members are zero.
if (list->length() == 0)
return Geometry::DOMRect::construct_impl(realm(), 0, 0, 0, 0).release_value_but_fixme_should_propagate_errors();
// 3. If all rectangles in list have zero width or height, return the first rectangle in list.
auto all_rectangle_has_zero_width_or_height = true;
for (auto i = 0u; i < list->length(); ++i) {
auto const& rect = list->item(i);
if (rect->width() != 0 && rect->height() != 0) {
all_rectangle_has_zero_width_or_height = false;
break;
}
}
if (all_rectangle_has_zero_width_or_height)
return JS::NonnullGCPtr { *const_cast<Geometry::DOMRect*>(list->item(0)) };
auto const* paintable = this->paintable();
if (paintable && is<Painting::InlinePaintable>(*paintable)) {
auto const& inline_paintable = static_cast<Painting::InlinePaintable const&>(*paintable);
auto absolute_rect = inline_paintable.bounding_rect();
absolute_rect.translate_by(-viewport_offset.x(), -viewport_offset.y());
return Geometry::DOMRect::create(realm(), absolute_rect.to_type<float>());
// 4. Otherwise, return a DOMRect object describing the smallest rectangle that includes all of the rectangles in
// list of which the height or width is not zero.
auto const* first_rect = list->item(0);
auto bounding_rect = Gfx::Rect { first_rect->x(), first_rect->y(), first_rect->width(), first_rect->height() };
for (auto i = 1u; i < list->length(); ++i) {
auto const& rect = list->item(i);
if (rect->width() == 0 || rect->height() == 0)
continue;
bounding_rect = bounding_rect.united({ rect->x(), rect->y(), rect->width(), rect->height() });
}
if (paintable) {
dbgln("FIXME: Failed to get bounding client rect for element ({})", debug_description());
}
return Geometry::DOMRect::construct_impl(realm(), 0, 0, 0, 0).release_value_but_fixme_should_propagate_errors();
return Geometry::DOMRect::create(realm(), bounding_rect.to_type<float>());
}
// https://drafts.csswg.org/cssom-view/#dom-element-getclientrects
@ -883,22 +889,39 @@ JS::NonnullGCPtr<Geometry::DOMRectList> Element::get_client_rects() const
// NOTE: Ensure that layout is up-to-date before looking at metrics.
const_cast<Document&>(document()).update_layout();
// 1. If the element on which it was invoked does not have an associated layout box return an empty DOMRectList object and stop this algorithm.
if (!layout_node() || !layout_node()->is_box())
// 1. If the element on which it was invoked does not have an associated layout box return an empty DOMRectList
// object and stop this algorithm.
if (!layout_node())
return Geometry::DOMRectList::create(realm(), move(rects));
// FIXME: 2. If the element has an associated SVG layout box return a DOMRectList object containing a single DOMRect object that describes
// the bounding box of the element as defined by the SVG specification, applying the transforms that apply to the element and its ancestors.
// FIXME: 2. If the element has an associated SVG layout box return a DOMRectList object containing a single
// DOMRect object that describes the bounding box of the element as defined by the SVG specification,
// applying the transforms that apply to the element and its ancestors.
// FIXME: 3. Return a DOMRectList object containing DOMRect objects in content order, one for each box fragment,
// 3. Return a DOMRectList object containing DOMRect objects in content order, one for each box fragment,
// describing its border area (including those with a height or width of zero) with the following constraints:
// - Apply the transforms that apply to the element and its ancestors.
// - If the element on which the method was invoked has a computed value for the display property of table
// or inline-table include both the table box and the caption box, if any, but not the anonymous container box.
// - Replace each anonymous block box with its child box(es) and repeat this until no anonymous block boxes are left in the final list.
// FIXME: - Apply the transforms that apply to the element and its ancestors.
// FIXME: - If the element on which the method was invoked has a computed value for the display property of table
// or inline-table include both the table box and the caption box, if any, but not the anonymous container box.
// FIXME: - Replace each anonymous block box with its child box(es) and repeat this until no anonymous block boxes
// are left in the final list.
const_cast<Document&>(document()).update_layout();
VERIFY(document().navigable());
auto viewport_offset = document().navigable()->viewport_scroll_offset();
auto const* paintable = this->paintable();
if (auto const* paintable_box = this->paintable_box()) {
auto absolute_rect = paintable_box->absolute_border_box_rect();
absolute_rect.translate_by(-viewport_offset.x(), -viewport_offset.y());
rects.append(Geometry::DOMRect::create(realm(), absolute_rect.to_type<float>()));
} else if (paintable && is<Painting::InlinePaintable>(*paintable)) {
auto const& inline_paintable = static_cast<Painting::InlinePaintable const&>(*paintable);
auto absolute_rect = inline_paintable.bounding_rect();
absolute_rect.translate_by(-viewport_offset.x(), -viewport_offset.y());
rects.append(Geometry::DOMRect::create(realm(), absolute_rect.to_type<float>()));
} else if (paintable) {
dbgln("FIXME: Failed to get client rects for element ({})", debug_description());
}
auto bounding_rect = get_bounding_client_rect();
rects.append(*bounding_rect);
return Geometry::DOMRectList::create(realm(), move(rects));
}