Previously it was possible to have following sequence of calls
while destroying a session:
1. `WebContentConnection::die()` calls `Client::close_session()`
2. `Client::close_session()` removes a session from active sessions
map which causes session destructor call.
3. Session destructor calls `Client::close_session()` to remove a
session from active sessions.
With `stop()` method inlined into destructor `close_session()` need
to be called just once while destroying a session.
The spec states to only try to close the session *if* it exists. This
situation can occur when closing a session after a Close Window command,
as the session will be closed automatically if it was the last window.
These steps now have more than one caller; specifically, they may be
called from the Delete Session and Close Window endpoints. The session
was only removed from the active session map for the former endpoint.
Instead, let's more accurately handle removing the session where the
spec tells us to, so that all callers properly perform this step.
When some WebDriver spec steps are implemented a bit more literally, we
will end up in a situation where we remove a session from its client's
active session map, but still have more steps to perform. Currently,
when we remove the session, it is immediately destroyed because it is
stored in an OwnPtr. Instead, we can store it as a RefPtr, which will
let the caller to such steps keep the session alive until the subsequent
steps are complete.
While here, this also changes the storage of active sessions to a
HashMap, as all lookups into it are currently a linear search.
WebDriver::Session::close_window may invoke Session::stop, which needs
the WebContent connection to still exist. Do not remove the window's
handle (thus destroying the connection) until it is no longer needed.
With current architecture every window has its own WebContent process
and there is one WebDriver process that is responsible for talking to
all opened windows. It thus make sense to manage open windows from
WebDriver process instead of WebContent process that is not supposed
to know about all other opened WebContent processes.
This mostly reverts 826d5f8f9a but also
adds `web_content_connection` to window structure and window id
generation (currently out of spec).
With these changes `get_window_handles`, `switch_to_window` and
`close_window` start to actually switch, close and returned handles
of currently opened windows.
This changes the parameters parsed from a WebDriver HTTP request to
String for transferring over IPC. Conveniently, most locations these
were ultimately passed to only need a StringView.
This moves the actual launching of browser windows to the WebDriver main
file. This will allow Ladybird to specify its own callback and re-use
Serenity's Session class.
We have a new, improved string type coming up in AK (OOM aware, no null
state), and while it's going to use UTF-8, the name UTF8String is a
mouthful - so let's free up the String name by renaming the existing
class.
Making the old one have an annoying name will hopefully also help with
quick adoption :^)
These lambdas were marked mutable as they captured a Ptr wrapper
class by value, which then only returned const-qualified references
to the value they point from the previous const pointer operators.
Nothing is actually mutating in the lambdas state here, and now
that the Ptr operators don't add extra const qualifiers these
can be removed.
Still some TODOs here:
* We don't handle all capabilities (e.g. proxy)
* We don't match the capabilities against the running browser
But this will parse the capabilities JSON object received from the
WebDriver client.
This moves Get Window Handle, Close Window, and Get Window Handles over
to WebContent so they may be implemented closer to the spec and be used
by Ladybird.
