This now uses the values in `InitialValues`, which is not ideal, but
it's better to have our defaults defined in two places, than in 3.
The default for `border-colors` is `currentcolor`, so we shortcut that
here and just grab the value of the `color` property. As noted, this is
not perfect, but it's somewhat better.
- The `text-decoration-foo` values now match the spec.
- Added values for `border-foo` since those are needed soon.
- Make `color`'s initial value be `-libweb-palette-base-text`.
This was specifically causing the string "0" to be parsed as an invalid
Dimension token with no units, instead of as a Number. That then caused
out generated `property_initial_value()` function to fail for those
values.
Shorthand properties were only checking for `ColorStyleValue`s, which
excludes identifier colors. Now they accept them too, including the
various `-libweb-foo` colors. :^)
The `currentcolor` identifier represents the current value of the
`color` property. This is the default value for `border-color` and
`text-decoration-color`, and is generally useful to have. :^)
This prevents flickering by ensuring that WebContent is only ever
painting into the back buffer bitmap. Without this change, it was
possible for WebContent to paint into the front buffer bitmap.
In the spec, `fill` and `stroke` are supposed to be a shorthands for
various properties. But since the spec is still a working draft, and
neither Firefox or Chrome support the `fill-color` or `stroke-color`
properties, we'll stick with `fill` and `stroke` as simple colors for
now.
Also, note that SVG expects things in "user units", and we are assuming
that 1px = 1 user unit for now.
In the past, the base class implementation of this was used to descend
into subtrees and paint children. That is now taken care of by
StackingContext::paint_descendants() instead, and nothing used this.
Computing the absolute rect of a box requires walking the chain of
containing blocks and apply any offsets encountered. This can be slow in
deeply nested box trees, so let's at least avoid doing it multiple times
when once is enough.
There are a whole bunch of SVG attributes, and we shouldn't mix them in
with the HTML attributes. This patch adds some of them to the new
namespace, but there are more to be added. :^)
Rather than destroying and rebuilding the entire document layout tree in
every call to `ComputedCSSStyleDeclaration::property()`, we now just
make sure that the layout tree exists.
This speeds up the DOM Inspector significantly, from taking several
seconds to select an element, to almost instant. :^)
The previous implementation was about a half implementation and was
tied to Element::innerHTML. This separates it and puts it into
HTMLDocumentParser, as this is in the parsing section of the spec.
This provides a near finished HTML fragment serialisation algorithm,
bar namespaces in attributes and the `is` value.
