Trait gio::prelude::AppLaunchContextExt

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pub trait AppLaunchContextExt: 'static {
    // Required methods
    fn display(
        &self,
        info: &impl IsA<AppInfo>,
        files: &[File]
    ) -> Option<GString>;
    fn environment(&self) -> Vec<OsString>;
    fn startup_notify_id(
        &self,
        info: &impl IsA<AppInfo>,
        files: &[File]
    ) -> Option<GString>;
    fn launch_failed(&self, startup_notify_id: &str);
    fn setenv(&self, variable: impl AsRef<OsStr>, value: impl AsRef<OsStr>);
    fn unsetenv(&self, variable: impl AsRef<OsStr>);
    fn connect_launch_failed<F: Fn(&Self, &str) + 'static>(
        &self,
        f: F
    ) -> SignalHandlerId;
    fn connect_launch_started<F: Fn(&Self, &AppInfo, Option<&Variant>) + 'static>(
        &self,
        f: F
    ) -> SignalHandlerId;
    fn connect_launched<F: Fn(&Self, &AppInfo, &Variant) + 'static>(
        &self,
        f: F
    ) -> SignalHandlerId;
}
Expand description

Trait containing all AppLaunchContext methods.

Implementors

AppLaunchContext

Required Methods§

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fn display(&self, info: &impl IsA<AppInfo>, files: &[File]) -> Option<GString>

Gets the display string for the self. This is used to ensure new applications are started on the same display as the launching application, by setting the DISPLAY environment variable.

info

a AppInfo

files

a GList of File objects

Returns

a display string for the display.

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fn environment(&self) -> Vec<OsString>

Gets the complete environment variable list to be passed to the child process when self is used to launch an application. This is a None-terminated array of strings, where each string has the form KEY=VALUE.

Returns

the child’s environment

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fn startup_notify_id( &self, info: &impl IsA<AppInfo>, files: &[File] ) -> Option<GString>

Initiates startup notification for the application and returns the XDG_ACTIVATION_TOKEN or DESKTOP_STARTUP_ID for the launched operation, if supported.

The returned token may be referred to equivalently as an ‘activation token’ (using Wayland terminology) or a ‘startup sequence ID’ (using X11 terminology). The two are interoperable.

Activation tokens are defined in the XDG Activation Protocol, and startup notification IDs are defined in the freedesktop.org Startup Notification Protocol.

Support for the XDG Activation Protocol was added in GLib 2.76.

info

a AppInfo

files

a GList of of File objects

Returns

a startup notification ID for the application, or None if not supported.

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fn launch_failed(&self, startup_notify_id: &str)

Called when an application has failed to launch, so that it can cancel the application startup notification started in startup_notify_id().

startup_notify_id

the startup notification id that was returned by startup_notify_id().

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fn setenv(&self, variable: impl AsRef<OsStr>, value: impl AsRef<OsStr>)

Arranges for variable to be set to value in the child’s environment when self is used to launch an application.

variable

the environment variable to set

value

the value for to set the variable to.

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fn unsetenv(&self, variable: impl AsRef<OsStr>)

Arranges for variable to be unset in the child’s environment when self is used to launch an application.

variable

the environment variable to remove

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fn connect_launch_failed<F: Fn(&Self, &str) + 'static>( &self, f: F ) -> SignalHandlerId

The launch-failed signal is emitted when a AppInfo launch fails. The startup notification id is provided, so that the launcher can cancel the startup notification.

Because a launch operation may involve spawning multiple instances of the target application, you should expect this signal to be emitted multiple times, one for each spawned instance.

startup_notify_id

the startup notification id for the failed launch

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fn connect_launch_started<F: Fn(&Self, &AppInfo, Option<&Variant>) + 'static>( &self, f: F ) -> SignalHandlerId

Available on crate feature v2_72 only.

The launch-started signal is emitted when a AppInfo is about to be launched. If non-null the platform_data is an GVariant dictionary mapping strings to variants (ie a{sv}), which contains additional, platform-specific data about this launch. On UNIX, at least the startup-notification-id keys will be present.

The value of the startup-notification-id key (type s) is a startup notification ID corresponding to the format from the startup-notification specification. It allows tracking the progress of the launchee through startup.

It is guaranteed that this signal is followed by either a launched or launch-failed signal.

Because a launch operation may involve spawning multiple instances of the target application, you should expect this signal to be emitted multiple times, one for each spawned instance.

info

the AppInfo that is about to be launched

platform_data

additional platform-specific data for this launch

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fn connect_launched<F: Fn(&Self, &AppInfo, &Variant) + 'static>( &self, f: F ) -> SignalHandlerId

The launched signal is emitted when a AppInfo is successfully launched.

Because a launch operation may involve spawning multiple instances of the target application, you should expect this signal to be emitted multiple times, one time for each spawned instance.

The platform_data is an GVariant dictionary mapping strings to variants (ie a{sv}), which contains additional, platform-specific data about this launch. On UNIX, at least the pid and startup-notification-id keys will be present.

Since 2.72 the pid may be 0 if the process id wasn’t known (for example if the process was launched via D-Bus). The pid may not be set at all in subsequent releases.

On Windows, pid is guaranteed to be valid only for the duration of the launched signal emission; after the signal is emitted, GLib will call g_spawn_close_pid(). If you need to keep the GPid after the signal has been emitted, then you can duplicate pid using DuplicateHandle().

info

the AppInfo that was just launched

platform_data

additional platform-specific data for this launch

Implementors§