This reverts commit a73cd88f0c.
Emitting SaveLayer for each paintable made rasterization a lot slower
on every website because now Skia has to allocate enormous amounts of
temporary surfaces. Let's revert it for now and figure how to implement
it with less aggressive SaveLayer usage.
Whenever we generate line boxes, we might end up with a residual
vertical float clearance by way of having a `<br>` with `clear: ..` set.
Set the Y offset of the next block level box to place by this vertical
clearance.
Relates to #4058.
We were introducing a line break and applying vertical clearance to the
inline formatting context, but that vertical clearance only applied to
new floating boxes. We should move the current block offset to the
vertical clearance to make sure the next line box starts beyond the
cleared floats.
There was a layout test for `<br>` with `clear: ..` set, but that test
did not actually do anything - removing the `clear` property would
result in the same layout. Replace that test with something that
actually tests float clearing.
Relates to #4058.
Our recent change to get rid of the "move 1px at a time" algorithm in
the float positioning logic introduced the issue that potentially
intersecting float boxes were not evaluated in order anymore. This could
result in float boxes being pushed down further than strictly necessary.
By finding the highest point we can move the floating box to and
repeating the process until we're no longer intersecting any floating
box, we also solve some edge cases like intersecting with very long
floating boxes whose edges lay outside the current box' edges.
This is by no means the most efficient solution, but it is more correct
than what we had until now.
Fixes#4110.
We used to always clear the side data after encountering a box with
`clear: ..`, but this is not the right thing to do if that same box also
has `float: ..` set. For example, with `clear: right` and `float: left`
it might be that the next box still wants to clear the right side, and
since the previous box is floating it did not push the next box down far
enough to justify clearing the side data at that point.
This changes the logic to only clear the float side if the clearing box
itself is not floating. We also no longer clear the opposite side after
placing a floating box; that doesn't seem to be necessary anymore.
Fixes#4102.
When generating line boxes, we place floats simultaneously with the
other items on the same line. The CSS text spec requires us to trim the
whitespace at the end of each line, but we only did so after laying out
all the line boxes.
This changes the way we calculate the current line box width for floats
by subtracting the amount of pixels that the current trailing whitespace
is using.
Fixes#4050.
Allows us to avoid DOM node lookup whenever we need to query natural
size of a box during layout.
Makes 3-4% of `Box::preferred_aspect_ratio()` go away from profiles on
www.nyan.cat
It's safe to remove this pointer because intrinsic layout should never
look up a box's state beyond its containing block.
This change affects the expectations of two layout tests, but both
already differ slightly from other browsers, and the difference between
expectations is less than 5px.
The upcoming generated types will match those for pseudo-classes: A
PseudoElementSelector type, that then holds a PseudoElement enum
defining what it is. That enum will be at the top level in the Web::CSS
namespace.
In order to keep the diffs clearer, this commit renames and moves the
types, and then a following one will replace the handwritten enum with
a generated one.
...boxes with non-auto height.
We know for sure that by the time we layout abspos boxes, their
containing block has definite height, so it's possible to resolve
non-auto heights and mark it as definite before doing inner layout.
Big step towards having reasonable performance on
https://demo.immich.app/photos because now we avoid a bunch of work
initiated by mistakenly invoked intersection observer callbacks.
Co-Authored-By: Andreas Kling <andreas@ladybird.org>
It was annoying to maintain two separate but almost identical functions
that gradually accumulated small differences over time. This change
replaces them with a single function that resolves either width or
height, depending on the specified dimension.
With this change we no longer stretch "width: auto" for replaced
elements and also use "width calculation rules for block-level replaced
elements", like suggested by the spec.
positioned element is a descendant of inline-block
Sets inline block offsets in InlineFormattingContext.cpp, but this is
not enough. When static position rect is calculated during layout,
not all ancestors of abspos box may have their offsets calculated yet
(more info here: https://github.com/LadybirdBrowser/ladybird/pull/2583#issuecomment-2507140272).
So now static position rect is calculated relative to static containing
block during layout and calculation relative to actual containing block
is done later in
FormattingContext::layout_absolutely_positioned_element.
Fixes wpt/css/CSS2/abspos/static-inside-inline-block.html
Fixes underinvalidation caused by resolving text-decoration-thickness
during layout commit, while this property can be invalidated
independently of layout.
Instead of directly invoking `to_px()`,
`calculate_min_content_contribution()` needs to use
`calculate_inner_width()` and `calculate_inner_height()`, which are
aware of how to correctly handle `min-content` and `max-content` values.
Fixes https://github.com/LadybirdBrowser/ladybird/issues/3469
Height resolution assumes that when available space is definite, it
matches the size of non-anonymous containing block. With this change, we
correctly maintain this assumption when box is wrapped in anonymous
node.
Fixes https://github.com/LadybirdBrowser/ladybird/issues/3422
Before this change, the layout tree for slots was only updated after
creating a layout node for the slot itself. This was not enough to
account for partial layout tree rebuilds when the slot content changed.
With this change, we always recurse into the slot content.
Fixes expanding and collapsing of nodes in DOM tree inspector broken in
9b26f7eb0f
12c6ac78e2 with fixed mistake when cache
slot is copied instead of being referenced:
```cpp
auto cache =
box.cached_intrinsic_sizes().min_content_height.ensure(width);
```
while it should've been:
```cpp
auto& cache =
box.cached_intrinsic_sizes().min_content_height.ensure(width);
```
This change moves intrinsic sizes cache from
LayoutState, which is local to current layout run,
to layout nodes, so it could be reused between
layout runs. This optimization is possible because
we can guarantee that these measurements will
remain unchanged unless the style of the element
or any of its descendants changes.
For now, invalidation is implemented simply by
resetting cache on whole ancestors chain once we
figured that element needs layout update.
The case when layout is invalidated by DOM's
structural changes is covered by layout tree
invalidation that drops intrinsic sizes cache
along with layout nodes.
I measured improvement on couple websites:
- Mail list on GMail 28ms -> 6ms
- GitHub large code page 47ms -> 36ms
- Discord chat history 15ms -> 8ms
(Time does not include `commit()`)
We don't need to perform inside layout of flex and grid formatting
contexts when one of their ancestors is undergoing intrinsic size
measurement. This is because the parent formatting context will have
already sized the flex/grid container, and thus inside layout is
completely redundant work.
We already have a check to skip the layout of descendants if the
available size is intrinsic, but this is not sufficient in nested
intrinsic layout cases, where the available size might be definite even
though we are in intrinsic layout mode.
We already have a check to skip the layout of descendants if the
available size is intrinsic, but this is not sufficient in nested
intrinsic layout cases, where the available size might be definite even
though we are in intrinsic layout mode.
Before this change, an element masked with 'mask-image: url(...)' would
show the mask, but 'mask: url(...)' would not. On e.g. dialogic.nl it
would show white boxes instead of the actual images in the top
navigation bar. We still do not support many of the other mask
properties, but with this change at least the masks show up in both
cases.
