8a1f019b42
Three views ("home", "learn", "ask") — one per tab in the Home/Learn/Ask
Stack, switched via the same set_visible_child_name the tab switcher
itself uses, then captured as a full known-size canvas (the window is a
plain top-level, not layer-shell).
Plumbed through breadhelp's own cli::Action/parse() (three more fields,
same shape as force_onboard/autostart/suggest) rather than clap, matching
the app's existing non-clap idiom.
The HANDLES_COMMAND_LINE + thread_local HANDLE singleton architecture
needed one addition beyond the usual NON_UNIQUE-flag fix: every
invocation (including a --screenshot one) normally forwards to the
already-built window over D-Bus and reuses it — worse than the plain
GApplication case in the other apps, since here it's not just "message
the existing instance" but literally switching tabs on and re-capturing
the operator's real, live help-center window. NON_UNIQUE is now set
whenever --screenshot is present in argv (checked before the
Application is even built, since cli::parse() only runs per-invocation
inside connect_command_line).
67 lines
2.4 KiB
Rust
67 lines
2.4 KiB
Rust
//! `--screenshot` CLI mode: switch to the named tab, capture it via
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//! `bread-screenshots`, then exit — driven by `bread-ecosystem`'s
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//! `bread-capture` orchestrator, or run standalone for one-off captures.
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//!
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//! breadhelp has three tabs worth capturing (Home/Learn/Ask), switched via
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//! the same `Stack::set_visible_child_name` the tab switcher itself uses —
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//! see `ui::tabs`. The window is a plain top-level (not layer-shell), so a
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//! full known-size canvas capture is enough, same reasoning as breadpad's
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//! popup view.
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use gtk4::prelude::*;
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use std::path::PathBuf;
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use std::time::Duration;
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/// Extra settle time after `map` for the first frame to actually paint
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/// before grim runs — `map` fires once the surface exists, not once
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/// anything has been drawn into it.
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const SETTLE_DELAY: Duration = Duration::from_millis(300);
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const KNOWN_VIEWS: &[&str] = &["home", "learn", "ask"];
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#[derive(Clone)]
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pub struct ScreenshotRequest {
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pub view: String,
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pub output: PathBuf,
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pub width: u32,
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pub height: u32,
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}
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/// Wire up the given view's screenshot sequence against an already-built
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/// window and its tab `Stack`. Every path here ends by exiting the process
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/// — it never returns control to the normal help-center UI.
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pub fn dispatch(window: >k4::ApplicationWindow, stack: >k4::Stack, req: ScreenshotRequest) {
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if !KNOWN_VIEWS.contains(&req.view.as_str()) {
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eprintln!(
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"breadhelp: unknown screenshot view '{}' (known: {})",
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req.view,
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KNOWN_VIEWS.join(", ")
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);
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std::process::exit(1);
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}
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stack.set_visible_child_name(&req.view);
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let output = req.output;
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let (width, height) = (req.width as i32, req.height as i32);
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window.connect_map(move |_| {
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let output = output.clone();
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gtk4::glib::timeout_add_local_once(SETTLE_DELAY, move || {
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finish(bread_screenshots::capture_region(0, 0, width, height, &output));
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});
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});
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// The caller (`ui::window::present`) returns immediately after this for
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// the screenshot path, skipping its own normal `window.present()` call
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// — trigger it here instead, so `connect_map` above actually has
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// something to fire for.
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window.present();
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}
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fn finish(result: anyhow::Result<()>) {
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match result {
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Ok(()) => std::process::exit(0),
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Err(e) => {
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eprintln!("breadhelp: screenshot capture failed: {e}");
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std::process::exit(1);
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}
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}
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}
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