This patch just adds the new root paintable and updates the tests
expectations. The next patch will move painting logic from the layout
viewport to the paint viewport.
Changing `calculate_min_content_heigh()` and
`calculate_min_content_heigh()` to accept width as `CSSPixels`, instead
of `AvailableSize` that might be indefinite, makes it more explicit
that width is supposed to be known by the time height is measured.
This change has a bit of collateral damage which is rows height
calculation regression in `table/inline-table-width` that worked before
by accident.
Using avilable space directly while resolving table container width
allows to avoid assigning it to table wrapper box content width which
sometimes involves infinite (saturated) values.
Also this allows to get rid of set_max_content_width() which is a hack
that allows to bypass set_content_width() to assign infinite
(saturated) width to a box.
Closes https://github.com/SerenityOS/serenity/issues/19521
Replicate the more conservative way it's done for other nodes, for
which we verify whether they have a paintable before doing
painting-related operations with it.
Fixes crash on https://www.haiku-os.org/.
Use the max-width of percentage cells instead of min-width as the
reference to be used to compute the total table width. The specification
only suggests that the UA should try to satisfy percentage constraints
and this behavior is more consistent with other browsers.
For malformed tables which only have cells with span greater than 1, the
content sizes for row and column aren't initialized to non-zero values.
Avoid undefined behavior in such cases, which sometimes show up on
Wikipedia.
Using fixed-point saturated arithmetics for CSSPixels allows to avoid
accumulating floating-point errors.
This implementation is not complete yet: currently saturated
arithmetics implemented only for addition. But it is enough to not
regress any of layout tests we have :)
See https://github.com/SerenityOS/serenity/issues/18566
Follow the computing column measures section of the specification, which
gives an algorithm for setting intrinsic percentage widths when spanning
columns are involved.
Change how we store type of columns. It was used where the specification
only distinguishes between percent and everything else, so it makes more
sense to store and use it as a boolean.
The specification says we should distribute excess width proportionally
to the width of the cell, not to the preferred increment. Doing the
latter leads to distributing all excess width to just the cells which
demand some increment, even if it's very modest. Moreover, there's code
which partially implements the correct criteria just below the one we
remove here.
As it turns out, Layout::TreeBuilder never managed to wrap text within
table boxes in anonymous wrapper boxes, since it relied on checking
text_for_rendering(), and that was never initialized during that early
stage of tree building.
This patch fixes the issue by making text_for_rendering() compute the
(potentially collapsed) text lazily when called.
Note that the test included with this patch is still totally wrong,
but that is now a TFC problem rather than a TreeBuilder problem. :^)
Cell percentage widths are relative to table width, not containing
block width. If the table width is auto, there isn't a normative
specification, only a brief mention that the user agent should try to
meet it.
As a starting point, we increase the width of the table such that it's
sufficient to cover min-width of cells with a percentage width. This
matches the behavior of other browsers, at least for simple cases.
This ensures that min-content contributions from cells with no content
are computed using their calculated values, which are never considered
for min-content before then. The specification diverges from column
measures algorithm, which doesn't use specified width of cells anywhere.
The used width is already a content width, which doesn't include
borders. Border widths should be subtracted from the specified width
instead, since that initially specifies the total width including
borders, for consistent comparison. Also handle table box padding as an
additional fix.
On style update, we have to preserve the invariant established when we
built the layout tree - some properties are applied to the table wrapper
and the table box values are reset to their initial values.
This also ensures that the containing block of a table box is always a
table wrapper, which isn't the case if we set absolute position on the
box instead of the wrapper.
Fixes#19452.
Adding undistributable space right before setting the content width is
incorrect when it's a percentage. Follow the specification and add it to
GRIDMIN and GRIDMAX instead.
The shortcut we put in place didn't resolve percentage widths and
ignored border spacing. We can still return early after we compute the
width per the specifications.
Compute the contributions to a spanning cell width from each cell in the
span. This better handles uneven column widths, since each cell
contribution is proportional with its own width as opposed to the own
width of the first cell in the span.
This better matches the behavior of other browsers and further aligns
with the specification.
With multi-line text cells, we don't reliably know the height would stay
the same as the one set by the independent format context run. In such
situations, we can end up with a table box which is sized inconsistently
with the grid boxes of the table due to differences in line breaks.
In compute_table_box_width_inside_table_wrapper, we should only consider
available_width when it's valid. Values which come from {min,
max}-content constraints aren't meaningful and shouldn't be considered
for the cap.
