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LibWeb: Layout inline elements respective of writing-mode

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Use the `writing-mode` property to determine what values should be used
for computing each element's rect on the screen. If it is a vertical
mode, swap the inline and block, lengths and offsets.

This only lays out whole inline formatting contexts vertically, and does
not currently support mixing the two orientations in a single context.
This commit is contained in:
BenJilks 2024-10-29 11:32:59 +00:00 • committed by Alexander Kalenik
commit 80e7e6dd7d
Notes: github-actions[bot] 2024-11-03 16:03:04 +00:00
9 changed files with 65 additions and 12 deletions
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7
Userland/Libraries/LibWeb/Layout/LineBoxFragment.cpp
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@ -13,7 +13,7 @@
namespace Web::Layout {
LineBoxFragment::LineBoxFragment(Node const& layout_node, int start, int length, CSSPixels inline_offset, CSSPixels block_offset, CSSPixels inline_length, CSSPixels block_length, CSSPixels border_box_top, CSS::Direction direction, RefPtr<Gfx::GlyphRun> glyph_run)
LineBoxFragment::LineBoxFragment(Node const& layout_node, int start, int length, CSSPixels inline_offset, CSSPixels block_offset, CSSPixels inline_length, CSSPixels block_length, CSSPixels border_box_top, CSS::Direction direction, CSS::WritingMode writing_mode, RefPtr<Gfx::GlyphRun> glyph_run)
: m_layout_node(layout_node)
, m_start(start)
, m_length(length)
@ -23,6 +23,7 @@ LineBoxFragment::LineBoxFragment(Node const& layout_node, int start, int length,
, m_block_length(block_length)
, m_border_box_top(border_box_top)
, m_direction(direction)
, m_writing_mode(writing_mode)
, m_glyph_run(move(glyph_run))
{
if (m_glyph_run) {
@ -34,11 +35,15 @@ LineBoxFragment::LineBoxFragment(Node const& layout_node, int start, int length,
CSSPixelPoint LineBoxFragment::offset() const
{
if (m_writing_mode != CSS::WritingMode::HorizontalTb)
return { m_block_offset, m_inline_offset };
return { m_inline_offset, m_block_offset };
}
CSSPixelSize LineBoxFragment::size() const
{
if (m_writing_mode != CSS::WritingMode::HorizontalTb)
return { m_block_length, m_inline_length };
return { m_inline_length, m_block_length };
}