446 lines
18 KiB
Rust
446 lines
18 KiB
Rust
//! Navigation-only adapter: validates destinations before changing presentation.
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use super::*;
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use crate::diagram_usage::{self as usage, Context, Event, Panel, Surface, Target, Usage};
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#[cfg(test)]
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mod tests;
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impl App {
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pub(crate) fn diagram_usage_message(&self, subject: Id) -> Message {
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Message::DiagramUsage(Event::Open(Context {
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document: self.canvas_document,
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revision: self.document.revision(),
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subject,
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}))
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}
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fn usage_navigation_available(&self) -> bool {
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!self.busy
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&& self.pending.is_none()
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&& self.file_prompt.is_none()
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&& !self.delete_pending
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&& self.workflow.is_none()
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&& !self.hosted.visible
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&& self.architecture.is_none()
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&& !self.reference_input_active()
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&& !self.behavior.has_pending()
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&& !self.draft_dirty()
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&& !self.source_dirty()
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}
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/// Admit at most one expensive lookup, including one accepted Project clone.
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/// A replacement panel waits for the previous worker's exact completion.
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fn start_diagram_lookup(&mut self) -> Task<Message> {
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let Some(panel) = self.diagram_usages.as_ref() else {
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return Task::none();
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};
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if !panel.loading || self.diagram_lookup_in_flight.is_some() {
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return Task::none();
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}
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let (token, context) = (panel.token, panel.context);
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if context.document != self.canvas_document
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|| context.revision != self.document.revision()
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|| !self.usage_navigation_available()
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{
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let panel = self.diagram_usages.as_mut().unwrap();
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panel.loading = false;
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panel.notice = Some(
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"The model or pending edits changed. Reopen diagram navigation when ready.".into(),
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);
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return Task::none();
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}
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let project = self.project().clone();
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let presentation = self.behavior.topology.usage_snapshot();
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self.diagram_lookup_in_flight = Some(token);
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Task::perform(
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async move {
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let result = tokio::task::spawn_blocking(move || {
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let process = presentation.into_query_state();
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let scenario = behavior::scenario::State::default();
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usage::collect(&project, context.subject, &process, &scenario)
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})
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.await
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.map_err(|error| format!("Diagram lookup failed: {error}. Close and try again."));
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usage::Completion {
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token,
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context,
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result,
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}
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},
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Message::DiagramUsagesReady,
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)
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}
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fn refresh_diagram_lookup(&mut self, notice: &str) -> Task<Message> {
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let Some(panel) = self.diagram_usages.as_mut() else {
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return Task::none();
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};
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panel.token = Id::new_v4();
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panel.context.revision = self.document.revision();
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panel.usages.clear();
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panel.loading = true;
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panel.page = 0;
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panel.cursor = 0;
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panel.destination = None;
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panel.notice = Some(notice.into());
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self.start_diagram_lookup()
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}
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/// Must run before modal/input dispatch. A closed or replaced panel still
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/// owns its worker slot until this exact completion arrives.
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pub(super) fn diagram_usages_ready(&mut self, completion: usage::Completion) -> Task<Message> {
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if self.diagram_lookup_in_flight != Some(completion.token) {
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return Task::none();
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}
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self.diagram_lookup_in_flight = None;
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let Some(panel) = self.diagram_usages.as_ref() else {
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return Task::none();
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};
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if panel.context.document != self.canvas_document {
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self.diagram_usages = None;
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return Task::none();
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}
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if panel.context.revision != self.document.revision() {
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return self
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.refresh_diagram_lookup("The model changed. Review the refreshed destinations.");
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}
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if panel.token != completion.token {
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// A newer Open/refresh waited without cloning or spawning a second job.
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return self.start_diagram_lookup();
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}
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let panel = self.diagram_usages.as_mut().unwrap();
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if panel.context != completion.context || !panel.loading {
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panel.loading = false;
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panel.notice = Some(
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"This lookup no longer matches the requested model. Close and try again.".into(),
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);
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return Task::none();
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}
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panel.loading = false;
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match completion.result {
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Ok(usages) => panel.usages = usages,
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Err(error) => panel.notice = Some(error),
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}
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Task::none()
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}
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/// Selection validates one destination only; opening the chooser does the
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/// whole-project scan on its worker, never on the GUI thread.
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fn current_surface_usages(&self, subject: Id, surface: Surface) -> Vec<Usage> {
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match surface {
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Surface::Saved(diagram) => {
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usage::saved_usages_for(self.project(), subject, Some(diagram))
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}
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Surface::Process(owner) => {
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self.behavior
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.topology
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.diagram_usages(self.project(), owner, subject)
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}
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Surface::Scenario(owner) => {
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self.behavior
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.scenario
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.diagram_usages(self.project(), owner, subject)
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}
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}
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}
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pub(super) fn diagram_usage_event(&mut self, event: Event) -> Task<Message> {
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if let Event::Open(context) = event {
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if context.document != self.canvas_document
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|| context.revision != self.document.revision()
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|| !self.project().contains(context.subject)
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{
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return Task::none();
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}
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if !self.usage_navigation_available() {
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self.status = "Apply or revert pending edits before opening diagram navigation. Your inputs are retained.".into();
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return Task::none();
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}
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let mut panel = Panel::new(context, Vec::new());
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panel.loading = true;
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let filter_id = format!("diagram-usage-filter-{}", panel.token);
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self.diagram_usages = Some(panel);
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self.model_menu = None;
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// Only an accepted new chooser supersedes the previous reveal.
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// Rejected/stale panel envelopes leave its first measurement intact.
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self.pending_diagram_reveal = None;
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self.diagram_navigation_focus = None;
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self.canvas_epoch = self.canvas_epoch.wrapping_add(1);
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return Task::batch([
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self.start_diagram_lookup(),
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iced::widget::operation::focus(filter_id),
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]);
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}
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let token = match &event {
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Event::Open(_) => unreachable!(),
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Event::Close(t)
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| Event::Search(t, _)
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| Event::Page(t, _)
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| Event::Move(t, _)
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| Event::Activate(t)
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| Event::Destination(t, _)
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| Event::Choose(t, _) => *t,
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};
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let Some(panel) = &self.diagram_usages else {
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return Task::none();
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};
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if panel.token != token {
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return Task::none();
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}
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if matches!(event, Event::Close(_)) {
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self.diagram_usages = None;
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if self.page == Page::Text {
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self.restore_source_editor_focus();
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}
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return Task::none();
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}
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if panel.context.document != self.canvas_document {
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self.diagram_usages = None;
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return Task::none();
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}
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if panel.context.revision != self.document.revision() {
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return self
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.refresh_diagram_lookup("The model changed. Review the refreshed destinations.");
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}
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if panel.loading {
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// Search and Close remain useful while loading; queued activation
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// must not perform a synchronous fallback or choose an old row.
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if let Event::Search(_, query) = event {
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self.diagram_usages.as_mut().unwrap().search = query;
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}
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return Task::none();
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}
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match event {
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Event::Move(_, direction) => {
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let panel = self.diagram_usages.as_ref().unwrap();
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let count = panel.choices(self.project()).len();
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let panel = self.diagram_usages.as_mut().unwrap();
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if count > 0 {
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panel.cursor = if direction < 0 {
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(panel.cursor + count - 1) % count
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} else {
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(panel.cursor + 1) % count
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};
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panel.page = panel.cursor / 6;
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}
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}
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Event::Activate(_) => {
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let panel = self.diagram_usages.as_ref().unwrap();
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if let Some(event) = panel.choices(self.project()).get(panel.cursor).cloned() {
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return self.diagram_usage_event(event);
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}
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}
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Event::Search(_, query) => {
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let panel = self.diagram_usages.as_mut().unwrap();
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panel.search = query;
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panel.page = 0;
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panel.cursor = 0;
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}
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Event::Page(_, page) => {
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let panel = self.diagram_usages.as_mut().unwrap();
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panel.page = page;
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panel.cursor = page.saturating_mul(6);
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}
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Event::Destination(_, surface) => {
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let panel = self.diagram_usages.as_mut().unwrap();
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if surface.is_none() || panel.usages.iter().any(|u| Some(u.surface) == surface) {
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panel.destination = surface;
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panel.page = 0;
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panel.cursor = 0;
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}
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}
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Event::Choose(_, requested) => {
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if !self.usage_navigation_available() {
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return Task::none();
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}
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let subject = self.diagram_usages.as_ref().unwrap().context.subject;
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let fresh = self
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.current_surface_usages(subject, requested.surface)
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.into_iter()
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.find(|u| u.subject == requested.subject && u.target == requested.target);
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let Some(fresh) = fresh else {
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return self.refresh_diagram_lookup(
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"This representation changed. Review the refreshed destinations.",
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);
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};
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if self.reveal_diagram_usage(&fresh) {
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self.diagram_usages = None;
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self.status = format!(
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"{} · {} in {}",
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self.project().named(subject),
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fresh.role,
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self.project().named(fresh.surface.id())
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);
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return Task::batch(["model-explorer", "model-browser", "inspector"].map(
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|id| {
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iced::widget::operation::snap_to(
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id,
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iced::widget::scrollable::RelativeOffset::START,
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)
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},
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));
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}
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}
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Event::Open(_) | Event::Close(_) => unreachable!(),
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}
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Task::none()
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}
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pub(super) fn reveal_diagram_usage(&mut self, usage: &Usage) -> bool {
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if !self.usage_navigation_available() {
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return false;
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}
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let previous_layer = self.layer;
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let p = self.document.project();
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let (selected, placement) = match &usage.target {
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Target::Whole => (usage.surface.id(), None),
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Target::Placement(id) => {
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let Some(node) = p
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.diagrams
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.get(&usage.surface.id())
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.and_then(|d| d.nodes.get(id))
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else {
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return false;
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};
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(node.element, Some(*id))
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}
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Target::Port { port, placement } => (*port, Some(*placement)),
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Target::StateRow {
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placement,
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relation,
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} => (*relation, Some(*placement)),
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Target::Edge(id)
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| Target::ProcessLink(id)
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| Target::ScenarioObject(id)
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| Target::AllocationGrouping { relation: id, .. }
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| Target::ProcessPreviewLink { relation: id, .. } => (*id, None),
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Target::ProcessOccurrence(endpoint) => (
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endpoint
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.references
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.first()
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.copied()
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.unwrap_or(endpoint.occurrence),
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None,
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),
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};
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match usage.surface {
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Surface::Saved(id) => {
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let Some(diagram) = p.diagrams.get(&id) else {
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return false;
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};
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self.layer = diagram.layer;
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self.active_diagram = Some(id);
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if let Some(machine) = diagram.projection.state_machine() {
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let viewport = self.behavior.diagram.viewport.unwrap_or(iced::Size::new(
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(self.window_size.width - 610.).max(280.),
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(self.window_size.height - 320.).max(240.),
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));
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let (zoom, pan) = usage::camera_for(&usage.target, usage.bounds, viewport);
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self.behavior.diagram = behavior::state_view::State {
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diagram: Some(id),
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placement,
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viewport: Some(viewport),
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zoom,
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pan,
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fit: false,
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..Default::default()
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};
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self.behavior.active_owner = Some(machine);
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self.page = Page::Behavior;
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} else {
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let viewport = self.canvas_size.unwrap_or(iced::Size::new(
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(self.window_size.width - 550.).max(280.),
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(self.window_size.height - 284.).max(240.),
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));
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(self.zoom, self.pan) =
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usage::camera_for(&usage.target, usage.bounds, viewport);
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self.fit_to_view = false;
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self.page = Page::Diagram;
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}
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}
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Surface::Process(owner) => {
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if !self.behavior.topology.reveal_usage(
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p,
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self.canvas_document,
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owner,
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&usage.target,
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) {
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return false;
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}
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self.layer = p.elements[&owner].layer();
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self.behavior.active_owner = Some(owner);
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self.page = Page::Behavior;
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}
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Surface::Scenario(owner) => {
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if !self.behavior.scenario.reveal_usage(
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p,
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self.canvas_document,
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owner,
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&usage.target,
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) {
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return false;
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}
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self.layer = p.elements[&owner].layer();
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self.behavior.active_owner = Some(owner);
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self.page = Page::Behavior;
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}
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}
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self.selected = selected;
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self.selected_node = placement;
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self.model_menu = None;
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self.canvas_epoch = self.canvas_epoch.wrapping_add(1);
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self.selected_bend = None;
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self.connection = None;
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self.last_workspace_page = self.page;
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if previous_layer != self.layer {
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self.data_state = Default::default();
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self.explorer_index = crate::explorer::Index::new(self.project(), self.layer);
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self.explorer_focus = None;
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self.explorer_group = None;
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self.explorer_page = 0;
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}
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self.normalize_creation();
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self.reveal_explorer_selection();
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self.refresh_draft();
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self.diagram_navigation_focus = Some(usage::Focus {
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context: Context {
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document: self.canvas_document,
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revision: self.document.revision(),
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subject: usage.subject,
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},
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usage: usage.clone(),
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selected,
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});
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self.pending_diagram_reveal = Some((
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Context {
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document: self.canvas_document,
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revision: self.document.revision(),
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subject: usage.subject,
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},
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usage.clone(),
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self.canvas_epoch,
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));
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true
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}
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/// Validated presentation identity. Edit selection and Delete capture remain
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/// semantic; a port owner or allocation work box is only a visual marker.
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pub(crate) fn diagram_focus(&self, surface: Surface) -> Option<&Usage> {
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let focus = self.diagram_navigation_focus.as_ref()?;
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let current_surface = match surface {
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Surface::Saved(id) => {
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self.active_diagram == Some(id)
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&& matches!(self.page, Page::Diagram | Page::Behavior)
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}
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Surface::Process(owner) | Surface::Scenario(owner) => {
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self.page == Page::Behavior && self.behavior.active_owner == Some(owner)
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}
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};
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(current_surface
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&& focus.usage.surface == surface
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&& focus.context.document == self.canvas_document
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&& focus.context.revision == self.document.revision()
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&& focus.selected == self.selected)
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.then_some(&focus.usage)
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}
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}
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