You can still run the old parser with "br -O", but the new one is good
enough to be the default parser now. We'll fix issues as we go and
eventually remove the old one completely. :^)
This patch adds two script lists to Document:
- Scripts to execute when parsing has finished
- Scripts to execute as soon as possible
Since we don't actually load scripts asynchronously yet (we just do a
synchronous load when parsing the <script> element for simplicity),
these are already loaded by the time we get to "The end" of parsing.
If we have an <a> element on the list of active formatting elements
when hitting another "a" start tag, that's a parse error. Recover by
using the AAA.
I've been using this in the new HTML parser and it makes it much easier
to understand the state of unfinished code branches.
TODO() is for places where it's okay to end up but we need to implement
something there.
ASSERT_NOT_REACHED() is for places where it's not okay to end up, and
something has gone wrong.
We still don't handle non-ASCII input correctly, but at least now we'll
convert e.g ISO-8859-1 to UTF-8 before starting to tokenize.
This patch also makes "view source" work with the new parser. :^)
This is enough to parse the Google front page! (Note: I did have to
hack the tokenizer while parsing Google, in order to avoid named
character references screwing everything up. We'll fix that too soon
enough!)
While we're still supporting both the old and the new parser, we have
to deal with the way they load inline stylesheet (and scripts) a bit
differently.
The old parser loads all the text content up front, and then notifies
the containing element. The new parser creates the containing element
up front and appends text inside it afterwards.
For now, we simply do an empty "children_changed" notification when
first inserting a text node inside an element. This at least prevents
the CSS parser from choking on a single-character stylesheet.
The AAA is a somewhat daunting algorithm you have to run for certain
tag when inserted inside the <body> element. The purpose of it is to
resolve issues with mismatched tags.
This patch implements the first half of the AAA. We also move the
"list of active formatting elements" to its own class, since it kept
accumulating little behaviors. "Marker" entries are now signified by
null Element pointers in the list.
In step 4 of the "renstruct the active formatting elements" algorithm it
says:
Rewind: If there are no entries before entry in the list of active
formatting elements, then jump to the step labeled create.
Prior to this patch, the implementation accorded to the spec only for
the first loop iteration.
Unless otherwise stated, we shouldn't stop parsing just because there's
a parse error, so let's allow ourselves to continue.
With this change, we can now tokenize and parse the ACID1 test. :^)
