Calling loadMovieNum with a variable parameter compiles into a
GetURL2 call with a `_level` window target parameter. Previously
this triggered Ruffle to try to navigate to the SWF. Now it
properly loads the SWF inside the current movie.
During the raising process, we maintain a list of pointers to the lowest-most `textformat`, `p`, `font`, `a`, `b`, `i`, and `u` in the document that we are appending to. When we get a new one of any of those elements, we clear the rest off the stack. This forces us to add HTML in the same order Flash does.
LIs are not yet supported because they require us to process text line-by-line which doesn't mesh with this model.
There's also a test but the XML DOM generates HTML strings with the wrong attribute order, so the test fails spuriously.
This necessitated a change to edittext_bullet, which turns out is accidentally an entity test, too. It now no longer uses entities so that it won't spuriously fail due to an entity related problem.
This also replaces the `edittext_html_defaults` test with a more robust test that checks the default format and global format of SWF-based, text, and HTML test vectors.
This test is currently inaccurate by up to 5 pixels, this is due to some behavior with really, really wide tabstops and word breaks that I don't entirely get yet.
This is an approximate text with a 1-pixel tolerance because our height is currently off by one and I cannot explain why. Previous attempts to fix the bug have resulted in cascading errors that resulted in off-by-one errors in the opposite direction. This is still better than nothing and I need to check other tests in.
`EditText` supports two different forms of leading:
1. Font-provided leading, specified relative to the EM square and scaled with font size
2. User-specificed leading, specified in pixels
Notably, the former appears to apply to the first line in the text and pushes it down. This showed up in the `edittext_font_size` test, and according to that test result the leading is rounded *up* to the nearest pixel, plus one.
That last bit seems possibly wrong and is subject to further change, but it matches the tests at multiple scales.
Mike Welsh