Originally, the input was named `tokens`, and we later created a
`tokens_without_whitespace` from the filtered contents of `tokens`.
Since `tokens_without_whitespace` is what we actually want to use while
parsing, let's rename `tokens` -> `unprocessed_tokens` and use the
`tokens` name for the processed ones.
There were two bugs here, one of which hid the other:
- Only one offset would have a value, but we dereferenced both.
- We consumed a token whether it was a valid offset or not.
This removes a performance problem where we'd convert the style sheet's
default namespace from DeprecatedFlyString to FlyString once per rule
during selector matching.
The conversion now happens once, during CSS parse. It should eventually
be removed from there as well, but one step at a time. :^)
Implemented by adding the extra 3-value syntax as its own case and only
running it when parsing background-position. I'm sure it could be
implemented in a smarter way but this is still a bunch less code than
before. :^)
This means `object-position` will no longer incorrectly accept the
3-value background-position syntax.
Remove the now-ambiguous and unused `position` enum while we're at it.
(This enum only existed as a hack.)
Having two ways that `<position>` is represented is awkward and
unnecessary. So, let's combine the two paths together. This first step
copies and modifies the `parse_position()` code to produce a
`PositionStyleValue`.
Apart from returning a StyleValue, this also makes use of automatic enum
parsing instead of manually comparing identifier strings.
Instead of a StringView. This allows us to preserve the nice O(1) string
compare property of FlyString, and not needing to allocate when one is
needed.
Ideally all other places in Token should have similar changes done, but
to prevent a huge amount of churn, just change ident for now.
Now, the 'object-position' property gets properly parsed and is
provided to the rest of the ecosystem.
In the parser we use the same parsing as for the background-position,
which is not entirely correct but almost a <position>.
Passing a value of a type different than number or length-percentage
to transform-origin returned a null pointer, and we didn't take care
of that path before.
This patch fixes a crash caused by an incorrect CSS declaration, such as
`transform-origin: "center"`.
Fixes#21609
When parsing these, <number> is allowed anywhere that would usually
allow a <length>, <length-percentage>, or <angle>. The spec is not
clear on exactly how this should work
(see https://github.com/w3c/svgwg/issues/792 ) so I'm using some
artistic license until things are clearer:
- If we expected a <length>, treat the <number> as pixels.
- If we expected an <angle>, treat the <number> as degrees.
- Only allow direct <number> tokens, not calc() or other functions.
From what I can tell this is what the spec *intended* but I may be very
wrong. In any case, telling the ParsingContext whether we're parsing
one of these attributes is a cleaner approach and more correct than
temporarily enabling quirks mode, which we did previously.
