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LibWeb: Clip overflowing inline children when overflow != "visible"

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We now apply a paint-time clip to the padding rect of a BlockBox before
painting its inline-level children. This covers some of the behavior
we want from "overflow: hidden" etc but is far from a complete solution.
This commit is contained in:
Andreas Kling 2021-02-22 19:19:11 +01:00
parent be2b45b215
commit 53081226e9
2 changed files with 17 additions and 0 deletions
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15
Userland/Libraries/LibWeb/Layout/BlockBox.cpp
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@ -49,6 +49,11 @@ BlockBox::~BlockBox()
{
}
bool BlockBox::should_clip_overflow() const
{
return computed_values().overflow_x() != CSS::Overflow::Visible && computed_values().overflow_y() != CSS::Overflow::Visible;
}
void BlockBox::paint(PaintContext& context, PaintPhase phase)
{
if (!is_visible())
@ -59,6 +64,12 @@ void BlockBox::paint(PaintContext& context, PaintPhase phase)
if (!children_are_inline())
return;
if (should_clip_overflow()) {
context.painter().save();
// FIXME: Handle overflow-x and overflow-y being different values.
context.painter().add_clip_rect(enclosing_int_rect(padded_rect()));
}
for (auto& line_box : m_line_boxes) {
for (auto& fragment : line_box.fragments()) {
if (context.should_show_line_box_borders())
@ -67,6 +78,10 @@ void BlockBox::paint(PaintContext& context, PaintPhase phase)
}
}
if (should_clip_overflow()) {
context.painter().restore();
}
// FIXME: Merge this loop with the above somehow..
if (phase == PaintPhase::FocusOutline) {
for (auto& line_box : m_line_boxes) {