Otherwise, the load event will block the original document until GC
runs.
Without this, media-load-task-after-adoption.html would wait for the
idle timeout to trigger a garbage collection, which could sometimes
cause the test to time out entirely.
Move the layout tree from GC allocation to refcounted ownership so
removed layout and paint subtrees are destroyed synchronously instead
of waiting for the next GC sweep. This dramatically reduces GC memory
usage peaks after layout tree churn and makes it easier for memory use
to fall back after large document updates.
Update layout factories, tree traversal, SVG layout node creation,
paintable back-pointers, and pseudo-element layout links to use RefPtr
ownership.
Make display: contents follow the same shape as Blink and WebKit: the
element itself does not create a layout node, and its children are
flattened into the nearest layout parent. Wrap direct non-whitespace
text in an anonymous inline node when the boxless element contributes
inherited style to that text.
Use an internal inline wrapper for display: contents pseudo-elements
so generated content can still participate in layout, painting, hit
testing, and pseudo-element queries. Keep CSSOM reporting the computed
display value from the pseudo style, not the internal wrapper.
Remove the retained out-of-tree layout node list and its testing hook,
since the flattened model does not need a side owner for boxless
elements. Add coverage for inherited text style, dynamic insertion
order, pseudo-element hit testing, and computed style queries.
Move ComputedProperties and CascadedProperties out of the GC. They no
longer contain strong references to GC-managed data.
Keep computed styles alive from DOM elements and animation updates with
RefPtr. Pass style into layout constructors by reference, since layout
only copies the values it needs while building nodes.
Use GC::Weak for cascade source links, so entries no longer keep the
style declaration or shadow root alive.
Replacing the text node's contents with the normalized value after each
keystroke made it impossible to type some inputs. For example, `1e`
would cause the text node to be emptied, making it impossible to type
`1e2`. Also, `time`, `date`, and other time-related input types had no
intermediate valid values, so it was genuinely impossible to type in
them.
Additionally, typed numbers weren't being parsed as floats before
normalization, so even just typing `1.` would clear the text node, so
it was impossible to type a fractional number.
Represent WebIDL C++ types with a single CppType model that tracks
nullability, optional presence, and contained storage.
GC-like values now use GC::Ref/GC::Ptr directly, while containers choose
"plain", "Root", or "Conservative" container types depending on what
they contain. For example, sequence<Element> becomes a RootVector of
GC::Ref values, while sequence<SomeDictionary> becomes a
ConservativeVector only when the dictionary contains GC-like values.
This moves the generated bindings away from wrapping GC values in
GC::Root by default.
This has broad fallout as the types passed to interfaces for GC
objects changes almost fully across the board.
DecodedImageFrame only wraps a ref-counted Bitmap and color-space
metadata. The frame object itself does not provide shared mutable
state or lifetime ownership beyond those members, so ref-counting it
adds an unnecessary layer of indirection.
DecodedImageFrame now owns decoded bitmap pixels directly, so the
separate ImmutableBitmap wrapper no longer carries useful semantics.
Remove the class and pass decoded image frames or bitmaps at the
boundaries where pixels are actually required.
The Skia image cache now keys off DecodedImageFrame, matching the
display-list commands that paint decoded images. Video frames stay
owned by LibMedia, with the explicit YUV-to-bitmap conversion living
at HTMLVideoElement's decoded-frame entry point for canvas and WebGL
callers.
Previously, presentational hints bypassed the regular cascade pipeline
and wrote directly into `CascadedProperties` under
`CascadeOrigin::Author`. That meant `var()` substitution and the
invalid-at-computed-value-time fallback had to be duplicated in a
separate per-element pass, which in practice missed the IACVT step and
could leave a `GuaranteedInvalidStyleValue` in the cascaded
properties. This caused a crash in downstream code that assumed the
value had been resolved.
This introduces an `AuthorPresentationalHint` cascade origin and feeds
them through the cascade as normal declarations. This means that
`var()` resolution now happens in only one place.
Add `ECMAScriptRegex`, LibRegex's C++ facade for ECMAScript regexes.
The facade owns compilation, execution, captures, named groups, and
error translation for the Rust backend, which lets callers stop
depending on the legacy parser and matcher types directly. Use it in the
remaining non-LibJS callers: URLPattern, HTML input pattern handling,
and the places in LibHTTP that only needed token validation.
Where a full regex engine was unnecessary, replace those call sites with
direct character checks. Also update focused LibURL, LibHTTP, and WPT
coverage for the migrated callers and corrected surrogate handling.
We were conflating elements being the active element and elements being
activated. The :active pseudo class is supposed to be based on whether
an element will have its activation behavior run upon a button being
released.
Store whether an element is being activated as a flag that is set/reset
by EventHandler.
Doing this allows label elements to visually activate their control
without doing a weird paintable hack, so the Labelable classes have
been yeeted.
When editing or changing the selection inside an <input> or <textarea>,
we should scroll the container so the cursor is always visible. Note
that currently the cursor might still become invisible at the end of the
container since we do not reserve enough space for it to be made
visible.
The spec says:
> For the purpose of this specification, they all have the same effect
as auto. However, the host language may also take these values into
account when defining the native appearance of the element.
https://drafts.csswg.org/css-ui/#typedef-appearance-compat-special
Firefox at least hides the stepper buttons when this is set.
Prevents observably calling Trusted Types, which can run arbitrary JS,
cause crashes due to use of MUST and allow arbitrary JS to modify
internal elements.
Currently, ImageProvider::current_image_bitmap takes a Gfx::IntSize
argument which determines the size of the returned bitmap. The default
value of this argument is 0x0 which causes the function to return
nullptr. This behavior is evidently unintuitive enough that it has lead
to incorrect usage in multiple places. For example, the 2D canvas
drawImage method will never actually draw anything because it calls
current_image_bitmap with no arguments. And the naturalWidth and
naturalHeight of an image will always return 0 (even after the image has
loaded) for the same reason.
To correct this and hopefully avoid similar issues in the future,
ImageProvider::current_image_bitmap will be renamed to
current_image_bitmap_sized, and the default value for the size argument
will be removed. For consistency, a similar change will be made to
SVGImageElement::default_image_bitmap.
The existing current_image_bitmap function will no longer take a size
argument. Instead it will always return a bitmap of the image's
intrinsic size. This seems to be what most existing callers had already
assumed was the function's behavior.
This function was implemented in a few classes but is a common element
in all form associated elements and the functionality should be there.
With these minimal changes we get to implement 4 idl functions for free.
This suits the spec a bit better, and exposes the fact that we were
allowing `::ImageButton` to use the button layout although it is never
specified that it should do so. Tests were rebaselined for this.
This adapts the implementation of `is_mutable` to align more closely
with the spec. Specifically, it is now also taken into account whether
the element is enabled.
This porting effort makes it pretty clear we will want a UTF-16-aware
GenericLexer. But for now, we can actually make ASCII assumptions about
what we are parsing, and act accordingly.
For example, button inputs shouldn't have a cursor
displayed in their text since they're not editable,
and are not meant to be editable.
Fixes#4140
Co-authored-by: Sam Atkins <sam@ladybird.org>
We were unnecessarily discarding the shadow trees of various elements
when they were removed or detached from the DOM.
This especially caused a *lot* of churn when creating input elements via
setting .innerHTML on something. We ended up building each input
element's shadow tree 3 times instead of 1.
The original issue that we were trying to solve by discarding shadow
trees appears to have been solved elsewhere, and nothing else seems to
break by just allowing them to remain in place.
1.05x speedup on Speedometer's TodoMVC-jQuery.
Type changes are now signaled to radio buttons. This causes other radio
buttons in the group to be unchecked if the input element is a checked
radio button after the type change.
This change implements the requirements for the “suffering from an
overflow” and “suffering from an underflow” algorithms for
HTMLInputElement constraint validation.
