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Core::File's new `DontCreate` open mode removes the need for these
capabilities on SpiceAgent. We shouldn't have to create this file,
as if it doesn't exist, QEMU never initiated a spice connection!
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The spice server will ignore any clipboard-related messages if we don't
have the appropriate capabilities, but I think it's better for us to
do less CPU churning whenever the user copies something to their
clipboard.
It also stops the spice server from warning in the console
about a clipboard grab message being recieved when the capability was
never announced.
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This moves buffers around instead of implicitly copying them, and marks
the message types that hold these buffers as move-only.
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Now, we write the data recieved to a file when the user drags a file
onto the Spice Viewer window. Once complete, the FileExplorer will open
with the copied file highlighted.
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We also now use GUI::Clipboard for setting the clipboard contents,
instead of using a custom connection to the Clipboard server.
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The old message system was very dependent on syscalls, and the overall
structure made it hard to implement new features.
The new message system is pretty expandible, where each message has its
own dedicated class. As well as this, we now use Core::File and
AK::Stream for reading and writing messages.
Using AK::Stream also allows us to change the actual data source
(in this case, Core::File) without having to update a whole lot of code
in the future.
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We already have and use HashMap<DeprecatedString, DeprecatedString>
nearly everywhere, which is equivalent.
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When the host clears the clipboard (e.g. by running `pbcopy </dev/null`)
the Spice server sends an empty string to us. Previously, we would crash
as `AnonymousBuffer::create_with_size` doesn't accept a size of 0. Fix
this by passing `{}` to `async_set_clipboard_data` in this case.
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This prevents callers from accidentally discarding the result of
initialize(), which was the root cause of this OSS Fuzz bug:
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=55896&q=label%3AProj-serenity&sort=summary
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Not a single client of this API actually used the event mask feature to
listen for readability AND writability.
Let's simplify the API and have only one hook: on_activation.
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Nobody made use of the ErrorOr return value and it just added more
chance of confusion, since it was not clear if failing to sniff an
image should return an error or false. The answer was false, if you
returned Error you'd crash the ImageDecoder.
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The patch also contains modifications on several classes, functions or
files that are related to the `JPGLoader`.
Renaming include:
- JPGLoader{.h, .cpp}
- JPGImageDecoderPlugin
- JPGLoadingContext
- JPG_DEBUG
- decode_jpg
- FuzzJPGLoader.cpp
- Few string literals or texts
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Those don't have any non-try counterpart, so we might as well just omit
it.
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When trying to figure out the correct implementation, we now have a very
strong distinction on plugins that are well suited for sniffing, and
plugins that need a MIME type to be chosen.
Instead of having multiple calls to non-static virtual sniff methods for
each Image decoding plugin, we have 2 static methods for each
implementation:
1. The sniff method, which in contrast to the old method, gets a
ReadonlyBytes parameter and ensures we can figure out the result
with zero heap allocations for most implementations.
2. The create method, which just creates a new instance so we don't
expose the constructor to everyone anymore.
In addition to that, we have a new virtual method called initialize,
which has a per-implementation initialization pattern to actually ensure
each implementation can construct a decoder object, and then have a
correct context being applied to it for the actual decoding.
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These are not needed anymore since the introduction of the new
get_root_session_id syscall.
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This is a first step towards handling PNG encoding failures instead of
just falling over and crashing the program.
This initial step will cause encode() to return an error if the final
ByteBuffer copy fails to allocate. There are more potential failures
that will be surfaced by subsequent commits.
Two FIXMEs were killed in the making of this patch. :^)
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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 :^)
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Otherwise, we end up propagating those dependencies into targets that
link against that library, which creates unnecessary link-time
dependencies.
Also included are changes to readd now missing dependencies to tools
that actually need them.
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This is needed later in the program when doing unveil on the path of
"/tmp/session/%sid/portal/clipboard", because %sid is translated to the
root session ID which therefore relies on access to the /proc/all node.
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This patch allows to insert "%uid" in `IPC_CLIENT_CONNECTION`
declaration and in SystemServer's ini files. This pattern is replaced
then replaced by the UID of the owner of the service. It opens a path
for seamlessly managed, per-user portal.
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Each of these strings would previously rely on StringView's char const*
constructor overload, which would call __builtin_strlen on the string.
Since we now have operator ""sv, we can replace these with much simpler
versions. This opens the door to being able to remove
StringView(char const*).
No functional changes.
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Rename ClipboardServerConnection=>ConnectionToClipboardServer.
This was done with CLion's automatic rename feature.
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This was done with CLion's automatic rename feature.
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Apologies for the enormous commit, but I don't see a way to split this
up nicely. In the vast majority of cases it's a simple change. A few
extra places can use TRY instead of manual error checking though. :^)
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This change unfortunately cannot be atomically made without a single
commit changing everything.
Most of the important changes are in LibIPC/Connection.cpp,
LibIPC/ServerConnection.cpp and LibCore/LocalServer.cpp.
The notable changes are:
- IPCCompiler now generates the decode and decode_message functions such
that they take a Core::Stream::LocalSocket instead of the socket fd.
- IPC::Decoder now uses the receive_fd method of LocalSocket instead of
doing system calls directly on the fd.
- IPC::ConnectionBase and related classes now use the Stream API
functions.
- IPC::ServerConnection no longer constructs the socket itself; instead,
a convenience macro, IPC_CLIENT_CONNECTION, is used in place of
C_OBJECT and will generate a static try_create factory function for
the ServerConnection subclass. The subclass is now responsible for
passing the socket constructed in this function to its
ServerConnection base; the socket is passed as the first argument to
the constructor (as a NonnullOwnPtr<Core::Stream::LocalServer>) before
any other arguments.
- The functionality regarding taking over sockets from SystemServer has
been moved to LibIPC/SystemServerTakeover.cpp. The Core::LocalSocket
implementation of this functionality hasn't been deleted due to my
intention of removing this class in the near future and to reduce
noise on this (already quite noisy) PR.
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This is a first step towards better error propagation from image codecs.
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