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LibWeb/Layout: Simplified margin collapsing

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Rather than accumulating margins into a vector, and then looping through
them when resolving the margin, it's much simpler to just update two
fields, and sum them when resolving.
This commit is contained in:
Jeremia Dominguez
2024-10-20 15:03:00 -05:00
committed by Alexander Kalenik
parent 6f52064c4f
commit eafa70331d
2 changed files with 10 additions and 26 deletions
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12
Libraries/LibWeb/Layout/BlockFormattingContext.h
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@@ -126,13 +126,18 @@ private:
};
struct BlockMarginState {
Vector<CSSPixels> current_collapsible_margins;
CSSPixels current_positive_collapsible_margin;
CSSPixels current_negative_collapsible_margin;
Function<void(CSSPixels)> block_container_y_position_update_callback;
bool box_last_in_flow_child_margin_bottom_collapsed { false };
void add_margin(CSSPixels margin)
{
current_collapsible_margins.append(margin);
if (margin < 0) {
current_negative_collapsible_margin = min(margin, current_negative_collapsible_margin);
} else {
current_positive_collapsible_margin = max(margin, current_positive_collapsible_margin);
}
}
void register_block_container_y_position_update_callback(ESCAPING Function<void(CSSPixels)> callback)
@@ -158,7 +163,8 @@ private:
void reset()
{
block_container_y_position_update_callback = {};
current_collapsible_margins.clear();
current_negative_collapsible_margin = 0;
current_positive_collapsible_margin = 0;
}
};