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LibWeb: Don't include children of overflow:hidden in scrollable overflow

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This fixes an issue where Google Maps was getting page scrollbars
when it shouldn't have.
This commit is contained in:
Andreas Kling 2022-04-10 20:01:35 +02:00
parent 89c4e011e4
commit 20c65e4298
1 changed files with 19 additions and 9 deletions
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28
Userland/Libraries/LibWeb/Layout/BlockFormattingContext.cpp
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@ -559,6 +559,24 @@ void BlockFormattingContext::place_block_level_element_in_normal_flow_horizontal
box_state.offset = Gfx::FloatPoint { x, box_state.offset.y() };
}
static void measure_scrollable_overflow(FormattingState const& state, Box const& box, float& bottom_edge, float& right_edge)
{
auto const& child_state = state.get(box);
auto child_rect = absolute_content_rect(box, state);
child_rect.inflate(child_state.border_box_top(), child_state.border_box_right(), child_state.border_box_bottom(), child_state.border_box_left());
bottom_edge = max(bottom_edge, child_rect.bottom());
right_edge = max(right_edge, child_rect.right());
if (box.computed_values().overflow_x() == CSS::Overflow::Hidden && box.computed_values().overflow_y() == CSS::Overflow::Hidden)
return;
box.for_each_child_of_type<Box>([&](Box const& child) {
measure_scrollable_overflow(state, child, bottom_edge, right_edge);
return IterationDecision::Continue;
});
}
void BlockFormattingContext::layout_initial_containing_block(LayoutMode layout_mode)
{
auto viewport_rect = root().browsing_context().viewport_rect();
@ -571,17 +589,9 @@ void BlockFormattingContext::layout_initial_containing_block(LayoutMode layout_m
else
layout_block_level_children(root(), layout_mode);
// Compute scrollable overflow.
float bottom_edge = 0;
float right_edge = 0;
icb.for_each_in_subtree_of_type<Box>([&](Box const& child) {
auto const& child_state = m_state.get(child);
auto child_rect = absolute_content_rect(child, m_state);
child_rect.inflate(child_state.border_box_top(), child_state.border_box_right(), child_state.border_box_bottom(), child_state.border_box_left());
bottom_edge = max(bottom_edge, child_rect.bottom());
right_edge = max(right_edge, child_rect.right());
return IterationDecision::Continue;
});
measure_scrollable_overflow(m_state, icb, bottom_edge, right_edge);
if (bottom_edge >= viewport_rect.height() || right_edge >= viewport_rect.width()) {
// FIXME: Move overflow data to FormattingState!