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LibWeb: Start working on supporting fixed table layouts

Sometimes people make tables with a specific width. In those cases,
we can't just use the auto-sizing algorithm, but instead have to
respect whatever width the content specifies.

This is a bit rickety right now, since we don't implement generation
of anonymous table boxes.

The basic mechanism here is that block layout (which table-cell uses)
now has a virtual way of asking for the width of the logical containing
block. This is necessary as table-row does not produce a block-level
element and so was previously unable to provide a containing block
width for table-cell layout.

If the table has a non-auto specified width, we now interpret that as
a request to use fixed table layout. This will evolve over time. :^)
This commit is contained in:
Andreas Kling 2020-06-28 15:11:08 +02:00
parent daa88448e1
commit 7fc988b919
5 changed files with 45 additions and 13 deletions

View file

@ -26,6 +26,7 @@
#include <LibWeb/DOM/Element.h>
#include <LibWeb/Layout/LayoutTableCell.h>
#include <LibWeb/Layout/LayoutTableRow.h>
namespace Web {
@ -44,4 +45,11 @@ size_t LayoutTableCell::colspan() const
return to<Element>(*node()).attribute(HTML::AttributeNames::colspan).to_uint().value_or(1);
}
float LayoutTableCell::width_of_logical_containing_block() const
{
if (auto* row = first_ancestor_of_type<LayoutTableRow>())
return row->width();
return 0;
}
}