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LibWeb: Create "empty" line box fragments for inline elements

In order for inline elements (e.g <span>) to contribute padding etc.
to line boxes, we now create special "leading" and "trailing" fragments
for Layout::InlineNode and size them according to the horizontal
padding values.

The height of these fragments is taken from the tallest fragment on the
line. (Perhaps we should stop having per-fragment heights and just keep
a single height per line box, but that's a separate issue.)

In order to make things look nice, we now also adjust the height of all
fragments on a line so that nobody is shorter than the CSS line-height.
This commit is contained in:
Andreas Kling 2020-12-03 19:21:33 +01:00
parent 311e1039b5
commit d59ec3ab85
7 changed files with 56 additions and 4 deletions

View file

@ -33,7 +33,7 @@
namespace Web::Layout {
void LineBox::add_fragment(const Node& layout_node, int start, int length, int width, int height)
void LineBox::add_fragment(const Node& layout_node, int start, int length, int width, int height, LineBoxFragment::Type fragment_type)
{
bool text_align_is_justify = layout_node.style().text_align() == CSS::TextAlign::Justify;
if (!text_align_is_justify && !m_fragments.is_empty() && &m_fragments.last().layout_node() == &layout_node) {
@ -42,7 +42,7 @@ void LineBox::add_fragment(const Node& layout_node, int start, int length, int w
m_fragments.last().m_length = (start - m_fragments.last().m_start) + length;
m_fragments.last().set_width(m_fragments.last().width() + width);
} else {
m_fragments.append(make<LineBoxFragment>(layout_node, start, length, Gfx::FloatPoint(m_width, 0.0f), Gfx::FloatSize(width, height)));
m_fragments.append(make<LineBoxFragment>(layout_node, start, length, Gfx::FloatPoint(m_width, 0.0f), Gfx::FloatSize(width, height), fragment_type));
}
m_width += width;