236 lines
9.7 KiB
Rust
236 lines
9.7 KiB
Rust
//! Adapter from captured state-canvas events to the shared document transaction.
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use super::*;
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use crate::behavior::{
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self,
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state_edit::{self, Context, Event, Tool},
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};
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impl App {
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/// A saved state view has one renderer and tool set: the behavior workspace.
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/// Run after navigation/adoption, never as a model or property edit. Keeping
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/// selection and its Draft intact also preserves unrelated raw properties.
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pub(super) fn route_state_diagram_workspace(&mut self) {
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if self.page != Page::Diagram {
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return;
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}
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let Some((diagram, machine, layer)) = self.active_diagram.and_then(|id| {
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let view = self.project().diagrams.get(&id)?;
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Some((id, view.projection.state_machine()?, view.layer))
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}) else {
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return;
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};
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// Existing navigation guards own pending behavior forms. Never replace
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// their owner/camera if an exceptional caller leaves one on another page.
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if self.behavior.has_pending() {
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return;
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}
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self.layer = layer;
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self.page = Page::Behavior;
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self.behavior.active_owner = Some(machine);
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self.behavior.diagram = behavior::state_view::State {
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diagram: Some(diagram),
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placement: self.project().diagrams[&diagram]
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.nodes
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.values()
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.find(|node| node.id == self.selected || node.element == self.selected)
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.map(|node| node.id),
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..Default::default()
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};
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self.selected_node = None;
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self.canvas_epoch = self.canvas_epoch.wrapping_add(1);
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self.fit_state_diagram();
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}
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/// The behavior view resolved independently of the current page. Capture
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/// this before selection/layer changes, while it still identifies the view
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/// whose camera and tool are retained during navigation.
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pub(super) fn state_view_identity(&self) -> (Option<Id>, Option<Id>) {
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let owner = behavior::selected_owner(self);
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let diagram = owner.and_then(|owner| behavior::state_view::diagram(self, owner));
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(owner, diagram)
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}
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pub(super) fn reset_state_view_after_navigation(
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&mut self,
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previous: (Option<Id>, Option<Id>),
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) -> bool {
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let current = self.state_view_identity();
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if current == previous {
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return false;
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}
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self.behavior.diagram = behavior::state_view::State {
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diagram: current.1,
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..Default::default()
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};
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true
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}
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pub fn state_context(&self) -> Option<Context> {
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if self.page != Page::Behavior {
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return None;
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}
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let diagram = self.state_view_identity().1?;
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Some(Context {
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document: self.canvas_document,
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diagram,
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revision: self.document.revision(),
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epoch: self.canvas_epoch,
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})
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}
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pub(super) fn fit_state_diagram(&mut self) {
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let Some(context) = self.state_context() else {
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return;
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};
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let diagram = &self.project().diagrams[&context.diagram];
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let view = projection::project_diagram(self.project(), diagram);
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let bounds = routing::route_diagram(self.project(), diagram, &view).bounds;
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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 width = (viewport.width - 48.).max(1.);
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let height = (viewport.height - 80.).max(1.);
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let zoom = (width / bounds.size.width.max(1.))
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.min(height / bounds.size.height.max(1.))
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.clamp(0.15, 1.25);
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self.behavior.diagram.zoom = zoom;
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self.behavior.diagram.pan = iced::Vector::new(
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24. + (width - bounds.size.width * zoom) / 2. - bounds.position.x * zoom,
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56. + (height - bounds.size.height * zoom) / 2. - bounds.position.y * zoom,
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);
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}
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pub(super) fn edit_state_diagram(&mut self, event: Event) -> Task<Message> {
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if self.page != Page::Behavior {
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return Task::none();
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}
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if let Some(captured) = event.context() {
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let Some(current) = self.state_context() else {
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return Task::none();
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};
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if state_edit::validate_context(self.project(), captured, current).is_err() {
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return Task::none();
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}
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}
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match event {
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Event::Viewport(_, size) => {
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if size.width.is_finite()
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&& size.height.is_finite()
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&& size.width > 0.
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&& size.height > 0.
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{
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let resized = self.behavior.diagram.viewport != Some(size);
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self.behavior.diagram.viewport = Some(size);
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if resized && self.behavior.diagram.fit {
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self.fit_state_diagram();
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}
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}
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}
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Event::Fit(_) => {
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self.behavior.diagram.fit = true;
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self.fit_state_diagram();
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}
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Event::Zoom(_, zoom) if zoom.is_finite() => {
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let state = &mut self.behavior.diagram;
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let new = zoom.clamp(0.15, 3.);
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let center = state.viewport.map_or(iced::Vector::new(300., 220.), |s| {
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iced::Vector::new(s.width / 2., s.height / 2.)
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});
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state.pan = center - (center - state.pan) * (new / state.zoom);
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state.zoom = new;
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state.fit = false;
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}
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Event::Pan(_, delta) if delta.x.is_finite() && delta.y.is_finite() => {
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self.behavior.diagram.pan += delta;
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self.behavior.diagram.fit = false;
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}
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Event::Select(_, id) => {
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if !self.behavior.has_pending() {
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self.select(id);
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self.selected_node = None;
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}
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}
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Event::ContextMenu {
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context,
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object,
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placement,
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anchor,
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} => {
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let mut request = crate::model_menu::Request::object(object, anchor);
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request.canvas = Some(context);
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request.placement = placement;
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return self.handle(Message::Menu(crate::model_menu::Event::Open(request)));
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}
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Event::EditTransition(_, id) => {
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if self.behavior.has_pending() || !self.apply() {
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return Task::none();
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}
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return self.handle(Message::Behavior(behavior::Event::States(
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behavior::states::Event::Edit(id),
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)));
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}
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Event::Choose(tool) => {
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if !self.apply() {
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return Task::none();
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}
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self.behavior.diagram.tool = tool;
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self.canvas_epoch = self.canvas_epoch.wrapping_add(1);
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}
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Event::CreateView(machine) => {
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if behavior::selected_owner(self) != Some(machine) || !self.apply() {
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return Task::none();
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}
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match state_edit::create_view(self.project(), machine) {
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Ok(plan) => {
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if self.execute(plan.command) {
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self.behavior.active_owner = Some(machine);
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self.behavior.diagram.diagram = Some(plan.diagram);
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self.behavior.diagram.placement = plan.placement;
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self.behavior.diagram.tool = Tool::Select;
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self.behavior.diagram.fit = true;
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self.selected = plan.selected;
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self.selected_node = None;
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self.refresh_draft();
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self.fit_state_diagram();
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self.status = "State diagram created · existing model elements are placed in this view".into();
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}
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}
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Err(error) => self.status = error.to_string(),
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}
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}
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Event::Zoom(..) | Event::Pan(..) => {}
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mutation => {
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if self.behavior.has_pending() || self.draft_dirty() || self.source_dirty() {
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self.status =
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"Apply or cancel pending edits before changing the state diagram.".into();
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return Task::none();
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}
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let Some(context) = self.state_context() else {
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return Task::none();
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};
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match state_edit::plan(self.project(), context, &mutation) {
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Ok(plan) => {
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if self.execute(plan.command) {
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self.behavior.diagram.diagram = Some(plan.diagram);
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self.behavior.diagram.placement = plan.placement;
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self.selected = plan.selected;
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self.selected_node = None;
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self.refresh_draft();
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if !matches!(mutation, Event::Move { .. }) {
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self.behavior.diagram.tool = Tool::Select;
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self.canvas_epoch = self.canvas_epoch.wrapping_add(1);
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}
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self.status =
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"State diagram updated · Undo restores the complete operation"
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.into();
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}
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}
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Err(error) => self.status = error.to_string(),
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}
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}
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}
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Task::none()
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}
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}
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