This change implements following paragraph from placement algorithm in
the spec:
"If the largest column span among all the items without a definite
column position is larger than the width of the implicit grid, add
columns to the end of the implicit grid to accommodate that column
span."
There were places in the grid implementation code with copies of this
text, but those were completely unrelated to the code where they were
being pasted so I removed them.
Instead of hard-coding a check for "calc", we now call out to
parse_dynamic_value() which allows use of other functions like min(),
max(), clamp(), etc.
Adds a second pass to resolve percentage paddings and margins of grid
items after track sizes are known. If resolving percentage paddings
or margins affects tracks sizes then second pass to re-resolve track
sizes might also be needed but I cannot come up with an example to
reproduce that so we can leave it to improve in the future :)
This fixes the issue when functions that distribute base_size
or growth_limit to tracks only considered *affected* spanned tracks
while calculating left extra that is available for distribution while
indeed it should be just *all* spanned track by specific item that
extra space size.
This fixes the issue that currently we use "auto" as initial value for
grid-template-column and grid-template-rows although spec says it
should be "none". This makes a lot of difference for these properties
because currently we represent "auto" as a list with one auto-sized
track which means initial value for grid-template-column defines one
"explicit" track while it should define none of them.
This change makes grid-auto-columns/rows be applied to the correct
tracks when initial values is used for grid-template-column/rows.
This changes grid items position storage type from unsigned to signed
integer so it can represent negative offsets and also updates placement
for grid items with specified column to correctly handle negative
offsets.
Use contains_percentage() that works for calc() values instead of
is_percentage().
This fixes issue when tracks with calc() that has percentages where
considered as "fixed" tracks with resolvable size which led to
incorrectly resolved infinite final track sizes.
From spec https://drafts.csswg.org/css-grid/#grid-items:
"Each in-flow child of a grid container becomes a grid item, and each
child text sequence is wrapped in an anonymous block container grid
item."
Fixes the problem that text sequences inside grid containers are
ignored and not displayed.
Fixes the bug that currently we always consider tracks with percentage
size as ones with "fixed" length even when available size is not
definite. With this change tracks with percentage size when available
size is not definite will be considered as "intrinsic" sized.
Introduces incomplete parsing of grid shorthand property. Only
<grid-template> part of syntax is supported for now but it is enough
to significantly improve rendering of websites that use this shorthand
to define grid :)
Implements more parts of sizing algorithm for tracks with spanning
items to archive parity with implementation for sizing of tracks
with non-spanning items.
Adds support for grid items with fixed size paddings. Supporting
percentage paddings will probably require to do second pass of tracks
layout: second pass is needed to recalculate tracks sizes when final
items sizes are known when percentage paddings are already resolved.
This change addresses the incorrect assumption that the available width
inside a grid item is equal to the width of the track it belongs to.
For instance, if a grid item has a width of 200px, the available width
inside that item is also 200px regardless of its column(s) base size.
To solve this issue, it was necessary to move the final resolution of
grid items to occur immediately after the final column track sizes are
determined. By doing so, it becomes possible to obtain correct
available width inside grid items while resolving the row track sizes.
item_incurred_increase should be reset before every next distirbution
because otherwise it will accumulate increases from previous
distributions which is not supposed to happen.
Previously, the width and height of grid items were set to match the
size of the grid area they belonged to. With this change, if a grid
item has preferred width or height specified to not "auto" value it
will be resolved using grid area as containing block and used instead.
1. Stop using -1 to indicate infinity value of growth limit. Just use
INFINITY for that.
2. More complete implementation of "Expand Flexible Tracks" step.
3. Return AvailableSize from get_free_space: spec says that this
function can return indefinite size and it is ok.
The file gap.html, which previously had multiple grid tests, has now
been divided into smaller files, each containing only one grid test.
It is going to make it easier to identify what inputs have been
affected by changes in layout code.
The file template-areas.html, which previously had multiple grid tests,
has now been divided into smaller files, each containing only one grid
test. It is going to make it easier to identify what inputs have been
affected by changes in layout code.
Also this change removes parts of template-areas.html that we can't
layout correctly yet.
This fixes a bug that was seen when a combination of the grid having
been floated with `float: left` and a `minmax()` column size were used.
The issue was that a grid track size should be considered intrinsically
sized if both the min and max sizes are intrinsic, not just one of them.
