This generally means that methods are more efficient, as we
don't need to encode to UTF16 on-the-fly to have correct indices.
This also fix some bugs:
- charCode now properly handle surrogate pairs
- calling lastIndexOf with the empty pattern and an OoB index now
properly returns the string length
Still missing is AVM2's String.match
This also necessitated removing the `impl_display_object` family of macros, as you cannot name a field of a field in a macro expression. I tried. So instead I've reverted to standard default method inheritance, in the same way we did with AVM2 objects.
Since `TextFormat.color` should preserve the alpha value, and the AVM1
getter/setter no longer reset it, we need to reset it in other places:
* `TextField.textColor` setter.
* `EditText` SWF tag handling.
* HTML parsing.
And to set it explicitly to 255 in `LayoutBox::as_renderable_text`.
`TextFormat` objects differ from regular objects in that
`TextField.setTextFormat` and `TextField.setNewTextFormat` accept
only the former, and ignore the latter.
Also, `TextFormat.prototype` has native accessors that coerce the
values on get/set.
For example, `tellTarget("bogus!!!") { var n = 2; gotoAndPlay(n); }`
should cause the _root clip to go to frame 2.
Fixes the character freezing in Steppenwolf 3-1 mentioned in #4585.
`tellTarget` to other clips should fail if the current base clip
has been removed. All properties of the clip return `undefined`
at this point, so traversing the target path should fail.
Fixes soft-lock in Steppenwolf 2-1 as mentioned in #4452.
Use prototype depths instead. Most calls passed `base_proto = None`,
which is equivalent to `depth = 0`, and is now the default.
The few other cases were adapted to use `Executable::exec` directly,
where `depth` can be specified manually.
* Change `AudioBackend::get_sound_position` to return `f64` to
match `AudioBackend::get_sound_duration`.
* Wire up `AudioBackend::get_sound_position` to `Sound.position`.
* Remove unimplmeneted warning from `Sound.position`.
This is a temporary hack to calculate depth from `base_proto` and
`this`, so that changing `this.__proto__` will affect `super`.
In the future, `depth` should be passed instead of `base_proto`.
Moulins