When we create a WebDriverConnection object, we currently hand it the
page client for which it was opened, and perform all actions on that
client. However, some WebDriver endpoints change the browsing context
(and therefore page client) on which future commands should be executed.
For example, the switch-frame endpoint will switch the current browsing
context to a frame/iframe context.
This patch implements the current browsing context (and current top-
level browsing context) concepts. They are initialized to that of the
original page. Most of this patch is making sure we execute actions on
the correct context.
We currently spin the platform event loop while awaiting scripts to
complete. This causes WebContent to hang if another component is also
spinning the event loop. The particular example that instigated this
patch was the navigable's navigation loop (which spins until the fetch
process is complete), triggered by a form submission to an iframe.
So instead of spinning, we now return immediately from the script
executors, after setting up listeners for either the script's promise to
be resolved or for a timeout. The HTTP request to WebDriver must finish
synchronously though, so now the WebDriver process spins its event loop
until WebContent signals that the script completed. This should be ok -
the WebDriver process isn't expected to be doing anything else in the
meantime.
Also, as a consequence of these changes, we now actually handle time
outs. We were previously creating the timeout timer, but not starting
it.
UI event handlers currently return a boolean where false means the event
was cancelled by a script on the page, or otherwise dropped. It has been
a point of confusion for some time now, as it's not particularly clear
what should be returned in some special cases, or how the UI process
should handle the response.
This adds an enumeration with a few states that indicate exactly how the
WebContent process handled the event. This should remove all ambiguity,
and let us properly handle these states going forward.
There should be no behavior change with this patch. It's meant to only
introduce the enum, not change any of our decisions based on the result.
Added the following Routes, IPC definitions, and boilerplates for the
missing endpoints:
- Switch To Frame
- Switch To Parent Frame
- Element Clear
- Element Send Keys
You can now build with STYLE_INVALIDATION_DEBUG and get a debug stream
of reasons why style invalidations are happening and where.
I've rewritten this code many times, so instead of throwing it away once
again, I figured we should at least have it behind a flag.
This change updates `ExecuteScript::execute_script()` and
`ExecuteScript::execute_script()` to bring their behavior in line with
each other and the current specification text.
Instances of the variable `timeout` have also been renamed to
`timeout_ms`, for clarity.
Even though the underlying time zone is already cached by LibUnicode, JS
performs additional expensive lookups with that time zone. There's no
need to do those lookups again until the system time zone has changed.
Choosing options from the `<select>` will load and display that style
sheet's source text, with some checks to make sure that the text that
just loaded is the one we currently want.
The UI is a little goofy when scrolling, as it uses `position: sticky`
which we don't implement yet. But that's just more motivation to
implement it! :^)
This will be used by the inspector, for showing style sheet contents.
Identifying a specific style sheet is a bit tricky. Depending on where
it came from, a style sheet may have a URL, it might be associated with
a DOM element, both, or neither. This varied information is wrapped in
a new StyleSheetIdentifier struct.
This creates a TimeZoneWatcher in the UI process to inform all open
WebContent processes when the time zone changes. The WebContent process
will clear its time zone cache to retrieve a fresh zone the next time
it is asked for one.
- Expose table from console object
- Add new Table log level
- Create a JS object that represents table rows and columns
- Print table as HTML using WebContentConsoleClient
When working on the Inspector's HTML, it's often kind of tricky to debug
when an element is styled / positioned incorrectly. We don't have a way
to inspect the Inspector itself.
This adds a button to the Inspector to export its HTML/CSS/JS contents
to the downloads directory. This allows for more easily testing changes,
especially by opening the exported HTML in another browser's dev tools.
We will ultimately likely remove this button (or make it hidden) by the
time we are production-ready. But it's quite useful for now.
We use instances of `Gfx::Bitmap` to move pixel data all the way from
raw image bytes up to the Skia renderer. A vital piece of information
for correct blending of bitmaps is the alpha type, i.e. are we dealing
with premultiplied or unpremultiplied color values?
Premultiplied means that the RGB colors have been multiplied with the
associated alpha value, i.e. RGB(255, 255, 255) with an alpha of 2% is
stored as RGBA(5, 5, 5, 2%).
Unpremultiplied means that the original RGB colors are stored,
regardless of the alpha value. I.e. RGB(255, 255, 255) with an alpha of
2% is stored as RGBA(255, 255, 255, 2%).
It is important to know how the color data is stored in a
`Gfx::Bitmap`, because correct blending depends on knowing the alpha
type: premultiplied blending uses `S + (1 - A) * D`, while
unpremultiplied blending uses `A * S + (1 - A) * D`.
This adds the alpha type information to `Gfx::Bitmap` across the board.
It isn't used anywhere yet.
We don't want to set the intrinsic Console object's client to non-top-
level clients, created for e.g. subframes. We also want to make sure the
Console client is updated if the top-level document has changed.
We explicitly stopped visting the map of documents to console clients in
commit 44659f2f2a to avoid keeping the
document alive. However, if nothing else visits the console clients, we
may set the top-level console client to a client that has been garbage
collected.
So instead of storing this map, just store the console client on the
document itself. This will allow the document to visit its client.
That usually happens in "exceptional" states when the client exits
unexpectedly (crash, force quit mid-load, etc), leading to the job flush
timer firing and attempting to write to a nonexistent object (the
client).
This commit makes RS simply cancel such jobs; cancelled jobs in this
state simply go away instead of sending notifications around.
This removes some ambiguity about what the return value should be if
the index is out of range.
Previously, we would sometimes return a JS null, and other times a JS
undefined.
It will also let us fold together the checks for whether an index is a
supported property index, followed by getting the value just afterwards.
