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LibWeb: Adjust border widths for tables using collapsing borders

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When using the collapsing border model, cells on either side of the edge
get half the specified width of the border for their box model.
This commit is contained in:
Andi Gallo 2023-07-07 05:31:54 +00:00 • committed by Andreas Kling
parent 8b6450842e
commit 4c81d39483
5 changed files with 67 additions and 53 deletions
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16
Userland/Libraries/LibWeb/Painting/PaintableBox.h
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@ -64,10 +64,16 @@ public:
{
auto padded_rect = this->absolute_padding_box_rect();
CSSPixelRect rect;
rect.set_x(padded_rect.x() - box_model().border.left);
rect.set_width(padded_rect.width() + box_model().border.left + box_model().border.right);
rect.set_y(padded_rect.y() - box_model().border.top);
rect.set_height(padded_rect.height() + box_model().border.top + box_model().border.bottom);
auto use_collapsing_borders_model = override_borders_data().has_value();
// Implement the collapsing border model https://www.w3.org/TR/CSS22/tables.html#collapsing-borders.
auto border_top = use_collapsing_borders_model ? round(box_model().border.top / 2) : box_model().border.top;
auto border_bottom = use_collapsing_borders_model ? round(box_model().border.bottom / 2) : box_model().border.bottom;
auto border_left = use_collapsing_borders_model ? round(box_model().border.left / 2) : box_model().border.left;
auto border_right = use_collapsing_borders_model ? round(box_model().border.right / 2) : box_model().border.right;
rect.set_x(padded_rect.x() - border_left);
rect.set_width(padded_rect.width() + border_left + border_right);
rect.set_y(padded_rect.y() - border_top);
rect.set_height(padded_rect.height() + border_top + border_bottom);
return rect;
}
@ -124,7 +130,7 @@ public:
bool is_out_of_view(PaintContext&) const;
void set_override_borders_data(BordersData const& override_borders_data) { m_override_borders_data = override_borders_data; }
auto const& override_borders_data() const { return m_override_borders_data; }
Optional<BordersData> const& override_borders_data() const { return m_override_borders_data; }
struct TableCellCoordinates {
size_t row_index;