This partially implements CSS-Animations-1 (though there are references
to CSS-Animations-2).
Current limitations:
- Multi-selector keyframes are not supported.
- Most animation properties are ignored.
- Timing functions are not applied.
- Non-absolute values are not interpolated unless the target is also of
the same non-absolute type (e.g. 10% -> 25%, but not 10% -> 20px).
- The JavaScript interface is left as an exercise for the next poor soul
looking at this code.
With those said, this commit implements:
- Interpolation for most common types
- Proper keyframe resolution (including the synthetic from-keyframe
containing the initial state)
- Properly driven animations, and proper style invalidation
Co-Authored-By: Andreas Kling <kling@serenityos.org>
Previously, `Heap` would store serialized data in blocks of 1024 bytes
regardless of the actual length. Data longer than 1024 bytes was
silently truncated causing database corruption.
This changes the heap storage to prefix every block with two new fields:
the total data size in bytes, and the next block to retrieve if the data
is longer than what can be stored inside a single block. By chaining
blocks together, we can store arbitrary amounts of data without needing
to change anything of the logic in the rest of LibSQL.
As part of these changes, the "free list" is also removed from the heap
awaiting an actual implementation: it was never used.
Note that this bumps the database version from 3 to 4, and as such
invalidates (deletes) any database opened with LibSQL that is not
version 4.
This is to allow testing autoplay, poster images, etc. without having to
stash local changes to the page. This also changes the URLs used on the
page to be relative to the page itself, to allow the page to load both
on Serenity and Lagom.
VALUES-4 defines the internal representation of `calc()` as a tree of
calculation nodes. ( https://www.w3.org/TR/css-values-4/#calc-internal )
VALUES-3 lacked any definition here, so we had our own ad-hoc
implementation based around the spec grammar. This commit replaces that
with CalculationNodes representing each possible node in the tree.
There are no intended functional changes, though we do now support
nested calc() which previously did not work. For example:
`width: calc( 42 * calc(3 + 7) );`
I have added an example of this to our test page.
A couple of the layout tests that used `calc()` now return values that
are 0.5px different from before. There's no visual difference, so I
have updated the tests to use the new results.
This fixes a bug in the CSS Grid when there is a column and/or row gap,
as previously it would take the index of the incorrect column when
finding the `AvailableSize`.
There is a mild complication in the GridFormattingContext as the
OccupationGrid does not take into account the gap columns and rows that
later appear in the `Vector<TemporaryTrack>` columns and rows. The
PositionedBoxes are kind of a connection between the two, and so it's
now more explicit whether you would like to refer to a column by its
position taking into the gap columns/rows or not.
Implement collapsing of a box margin-top and first in-flow
child margin-top by saving function that updates y position
of containing block inside BlockMarginState and then for
every child until "non-collapsed through" child is reached
y position of containing block is updated by calling
update_box_waiting_fox_final_y_position_callback.
Fixes a bug where when you had spans that that were bigger than the
grid, would create enough tracks to accomodate them. When a fixed
position is given, there should be at a minimum a row/column available
for the track. The span will be truncated if there is no space for it
later.
A bug was found where grid items were being drawn outside of the grid if
the item had a large span and the grid was defined as having gaps
between the rows/columns.
This was caused by an erroneous calculation of the
{row,column}_{start,span} properties.
This adds support for parsing the ::placeholder pseudo-element and
injecting an anonymous layout node with that element when the input
element's data is empty.
The window prototypes alert, confirm, and prompt must "pause" execution
until a response is received from the user. This test page is meant to
ensure that a timeout queued before a prompt is not executed until after
that prompt is closed.
This adds a test of a conic-gradient() with just a center position
and no starting angle.
This also adds a gradient that gives each quadrant a different color,
this is very sensitive to the center position being correct.
When a flex item has a specific preferred size, that size should be its
contribution to the containers intrinsic sizes.
This fixes an issue on Patreon where the logo would cover the entire
viewport since the SVG had a large intrinsic size but the flex item
containing it had a small specified size in CSS.
Add ability to use values passed to grid-template-columns and
grid-template-rows for CSS Grid layout within a repeat() function.
E.g. grid-template-columns: repeat(2, 50px); means to have two columns
of 50px width each.
When the indicated column-span is greater than the implicit grid (like
in cases when the grid has the default size of 1x1, and the column is
supposed to span any number greater than that), then previously were
crashing.
Ensure that when a grid item is passed with a span and a fixed end
position, that if the resulting start of this item is less than 0 then
it won't throw. This is a temporary measure until the correct
functionality is implemented.
Implement span correctly when indicated in the grid-column-start,
grid-row-start, etc. CSS properties. Previously it had been implemented
as if span was something that went alongside the position property, but
actually it seems like if you do 'span 3' in the grid-column-start
property, for example, this means it literally spans 3 blocks, and the
3 has nothing to do with position.
Layout box offset coordinates are always relative to their containing
block. Therefore, the functions that convert between coordinate spaces
should only visit containing blocks and apply their offsets, not *every*
box in the parent chain.
This fixes an issue where some floating boxes were unexpectedly far away
from their containing block.
This patch combines a number of techniques to make inline content flow
more correctly around floats:
- During inline layout, BFC now lets LineBuilder decide the Y coordinate
when inserting a new float. LineBuilder has more information about the
currently accumulated line, and can make better breaking decisions.
- When inserting a float on one side, and the top of the newly inserted
float is below the bottommost float on the opposite side, we now reset
the opposite side back to the start of that edge. This improves
breaking behavior between opposite-side floats.
- After inserting a float during inline layout, we now recalculate the
available space on the line, but don't adjust X offsets of already
existing fragments. This is handled by update_last_line() anyway,
so it was pointless busywork.
- When measuring whether a line can fit at a given Y coordinate, we now
consider both the top and bottom Y values of the line. This fixes an
issue where the bottom part of a line would bleed over other content
(since we had only checked that the top Y coordinate of that line
would fit.)
There are some pretty brain-dead algorithms in here that we need to make
smarter, but I didn't want to complicate this any further so I've left
FIXMEs about them instead.
- Use the border box of the floated element when testing if something
needs to flow around it.
- Take the floated element's containing block size into account (instead
of the BFC root) when calculating available space on a line where a
right-side float intrudes.
Also added a local test for ensuring this behavior since it is unique to
browsers. Since we don't actually use WindowProxy anywhere yet we just
test on location for now.
Neither of the tests here actually passes properly right now. It's a
little more aspirational...
In the first one, the circle draws in the wrong place due apparently to
existing bugs in `CanvasRenderingContext2D::ellipse()`.
In the second, I just haven't yet implemented creating a Path2D from an
SVG path string, because that's going to take a fair bit of untangling
first.
The previous demo didn't work that well, not due to any LibWeb
issue (same in other browsers), it just was a broken demo.
This demo shows the neat tricks you can do with linear-gradient()s
much better.
See: https://css-tricks.com/html5-progress-element/ this is a neat
demo of a pure CSS progress bar that makes use of linear-gradients,
background-repeat, and background-size. All of which now work :^)
* A border-radius + a border on a <img> tag
- The border-radius on the <img> should shrink to line up with
the border.
* A border-radius + a border on a div with overflow: hidden
- The clipping border-radius should shrink (same as the image).
