refactor(engine): move Session methods to session/{dispatch,edit,comps,render}.rs

This commit is contained in:
aiongg
2026-10-26 21:49:11 +00:00
parent 2b4fcdd3db
commit bba3291b24
5 changed files with 760 additions and 743 deletions
+5 -743
View File
@@ -3,747 +3,9 @@ use super::error::{EngineError, Result};
use super::event::Event;
use super::*;
/// `t` as a current time of `comp`: a frame within its duration.
fn comp_frame_at(comp: &Comp, t: Tick) -> Tick {
comp.frame_rate.snap_nearest(t.min(comp.duration - comp.frame_duration()).max(Tick::ZERO))
}
mod comps;
mod dispatch;
mod edit;
mod render;
impl Session {
pub fn new() -> Session {
Session::default()
}
/// Run a command by id.
pub fn execute(&mut self, id: &str, params: Value) -> Result<Value> {
let spec = commands::find(id).ok_or_else(|| EngineError::UnknownCommand(id.to_string()))?;
if let Err(why) = (spec.enabled)(self) {
// Explicit targets (agents, scripts) don't need a UI selection.
let explicit = (["layer", "layers", "prop", "keys"].iter().any(|k| params.get(k).is_some()) && commands::has_comp(self).is_ok())
|| ["item", "items"].iter().any(|k| params.get(k).is_some())
// An explicit composition (the enablement looks at the active one).
|| params.get("comp").is_some_and(|c| !c.is_null() && self.resolve_comp(Some(c)).is_ok());
if !explicit {
return Err(EngineError::Disabled(id.to_string(), why));
}
}
// Last-resort guard: a panicking command reports an error instead of crashing the app.
let r = guard::guarded(&format!("command `{id}`"), || (spec.run)(self, &params))?;
self.learn_observe(id, &params);
if spec.journal {
self.journal.push((id.to_string(), params));
if self.journal.len() > 10_000 {
self.journal.drain(..1000);
}
}
Ok(r)
}
/// [`Session::execute`] for agents and scripts (MCP, CLI, control channel): unknown top-level
/// parameters are rejected with the accepted keys instead of being silently ignored.
pub fn execute_checked(&mut self, id: &str, params: Value) -> Result<Value> {
let spec = commands::find(id).ok_or_else(|| EngineError::UnknownCommand(id.to_string()))?;
commands::check_params(spec, &params)?;
self.execute(id, params)
}
/// [`Session::execute`] for a command a script asked for (the JavaScript engine's
/// `app.run`, ScriptUI callbacks…). The command and everything it runs count as the script's:
/// it may not change the settings that limit scripts (Settings ▸ Scripting & Expressions ▸
/// Application Scripting), which only the user can, from the UI, CLI or control channel.
pub fn execute_for_script(&mut self, id: &str, params: Value) -> Result<Value> {
self.script_calls.0 = self.script_calls.0.saturating_add(1);
let r = self.execute(id, params);
self.script_calls.0 = self.script_calls.0.saturating_sub(1);
r
}
/// Whether the command running was issued by a script ([`Session::execute_for_script`]).
pub fn running_for_script(&self) -> bool {
self.script_calls.0 > 0
}
/// Whether `id` names a known command whose `enabled` predicate returns `Ok` for this session;
/// an unknown id or a predicate error reads as disabled.
pub fn is_enabled(&self, id: &str) -> bool {
commands::find(id).is_some_and(|c| (c.enabled)(self).is_ok())
}
/// Apply an undoable edit. `merge`: consecutive edits with the same key fold into one step.
///
/// Every edit is an external boundary for the on-canvas text editor: if it replaced the
/// document the editor is showing, the selection is clamped and the editor gets a fresh IME
/// epoch. The editor's own typing goes through `edit_text_doc`, which owns that
/// document and must not treat its own keystrokes as a replacement.
pub fn edit<T>(&mut self, label: &str, merge: Option<&str>, f: impl FnOnce(&mut Project, &mut EditorState) -> Result<T>) -> Result<T> {
let edited = commands::text_edit::active_editor_snapshot(self);
let out = self.edit_inner(label, merge, f)?;
commands::text_edit::after_external_change(self, edited.as_ref());
Ok(out)
}
/// [`Session::edit`] for the on-canvas editor's own text changes. Its document is the one
/// the editor owns, so a change here is typing, not a replacement behind the IME's back.
pub(crate) fn edit_text_doc<T>(&mut self, label: &str, merge: Option<&str>, f: impl FnOnce(&mut Project, &mut EditorState) -> Result<T>) -> Result<T> {
self.edit_inner(label, merge, f)
}
/// The shared body of [`Session::edit`] and [`Session::edit_text_doc`].
///
/// Runs `f` on a clone of the project and editor state, then synchronizes derived data (global
/// light and Essential Graphics), queues invalidated Warp Stabilizer/camera-tracker work and
/// Roto Brush instances needing re-propagation in the `*_pending` lists. If the clone has the same
/// content the project and history are left as they were (only editor-state changes from `f`
/// are kept) and no revision is bumped; otherwise the previous project is recorded as an
/// undo step under `label`, unless it merges with the current merge key (then the redo branch
/// is dropped). An `Err` from `f` propagates with the session unchanged.
fn edit_inner<T>(&mut self, label: &str, merge: Option<&str>, f: impl FnOnce(&mut Project, &mut EditorState) -> Result<T>) -> Result<T> {
let before = self.project.clone();
let mut p = (*self.project).clone();
let mut st = self.state.clone();
let r = f(&mut p, &mut st)?;
// Layer styles: one Global Light per comp, whichever layer edited it.
effectcraft_project::styles::sync_global_light(&before, &mut p);
// Essential Properties of precomp layers follow their comps' Essential Graphics.
effectcraft_project::essential::sync_project(&before, &mut p);
// Warp Stabilizer analyses made from other frames are cleared (and queued again).
for w in warp::invalidate(&before, &mut p) {
if !self.warp_pending.contains(&w) {
self.warp_pending.push(w);
}
}
// So are 3D Camera Tracker tracks (and solves made with other settings).
for w in camera_track::invalidate(&before, &mut p) {
if !self.camera_pending.contains(&w) {
self.camera_pending.push(w);
}
}
// Roto Brush Input Keys follow the frames; edited instances propagate again.
for r in roto::sync(&before, &mut p) {
if !self.roto_pending.contains(&r) {
self.roto_pending.push(r);
}
}
// Nothing changed (a value set to what it already was): no undo step, not modified.
if p.same_content(&before) {
self.state = st;
return Ok(r);
}
let same = merge.is_some() && merge.map(str::to_string) == self.history.merge_key;
if !same {
// Undone steps aren't lost: they stay in the History panel as a branch.
let levels = self.prefs.general.undo_levels.max(1) as usize;
self.history.record(label, before, levels);
} else {
self.history.abandon_redo(&before);
}
self.history.merge_key = merge.map(str::to_string);
self.project = Arc::new(p);
self.state = st;
self.bump();
Ok(r)
}
/// Note a change to the on-canvas editor's committed text or session.
///
/// Frontends compare this with [`commands::text_edit::ime_stamp_revision`]; an unrelated
/// project change must not advance it.
pub(crate) fn note_text_edit_change(&mut self) {
// Checked process-wide allocation: a stamp is never wrapped or reused. On exhaustion
// keep the previous value; an unavailable before/after pair then compares equal and
// earns no receipt instead of accepting a stale revision.
if let Some(revision) = commands::text_edit::next_ime_revision() {
self.ime_revision = self.ime_revision.max(revision);
}
}
pub fn bump(&mut self) {
self.revision += 1;
// Back at the saved state (undo, redo, a history jump or a rolled-back batch).
if Arc::ptr_eq(&self.project, &self.saved_project) {
self.saved_revision = self.revision;
}
self.refresh_disk_salt(false);
self.events.push(Event::ProjectChanged { revision: self.revision });
}
/// Salt the disk cache's layer keys with the project's footage files
/// ([`effectcraft_render::disk_cache::footage_salt`]). Taking it reads the size and time of
/// every file, every frame of an image sequence included, so it is taken again only when the
/// footage items changed, or with `force` (a project opened, footage reloaded, the disk cache
/// attached), not at every edit: with a few large sequences that cost each keystroke in a
/// text field over half a second (#1926).
pub fn refresh_disk_salt(&mut self, force: bool) -> Option<u64> {
use std::hash::{Hash, Hasher};
if self.disk_cache.is_none() {
self.disk_salt = None;
return None;
}
let mut h = std::collections::hash_map::DefaultHasher::new();
for (id, it) in &self.project.items {
if let effectcraft_project::ItemKind::Footage(f) = &it.kind {
id.hash(&mut h);
format!("{f:?}").hash(&mut h);
}
}
let footage = h.finish();
if let Some((seen, salt)) = self.disk_salt
&& seen == footage
&& !force
{
return Some(salt);
}
let salt = effectcraft_render::disk_cache::footage_salt(&self.project);
self.disk_salt = Some((footage, salt));
self.layer_cache.set_disk_salt(salt);
Some(salt)
}
/// Set a comp's Resolution. As in After Effects it is saved with the project (which becomes
/// modified) but is no undo step, and it changes no pixels: the comp's cached frames stay
/// valid ([`effectcraft_project::Comp::same_pixels`]).
pub fn set_resolution(&mut self, comp: ItemId, r: effectcraft_project::Resolution) -> Result<()> {
if self.project.comp(comp).ok_or(EngineError::NoComp)?.resolution == r {
return Ok(());
}
Arc::make_mut(&mut self.project).comp_mut(comp).ok_or(EngineError::NoComp)?.resolution = r;
self.bump();
Ok(())
}
/// Keep what lives outside the undo history (each comp's Resolution) as it is in `from`, the
/// project before undo, redo or a history jump restored another state.
pub(crate) fn keep_view_settings(&mut self, from: &Project) {
let keep: Vec<(ItemId, effectcraft_project::Resolution)> =
self.project.comps().filter_map(|(id, c)| from.comp(*id).map(|f| (*id, f.resolution)).filter(|(_, r)| *r != c.resolution)).collect();
if keep.is_empty() {
return;
}
let p = Arc::make_mut(&mut self.project);
for (id, r) in keep {
if let Some(c) = p.comp_mut(id) {
c.resolution = r;
}
}
}
/// Undoes one step: the current project goes onto the redo stack, per-comp Resolution is kept
/// as it was, the merge key is cleared, selections are sanitized for the replaced state (the
/// on-canvas editor gets a new IME epoch only when its own document changed) and the session is
/// bumped. Returns `false`, changing nothing, when there is nothing to undo.
pub fn undo(&mut self) -> bool {
let Some((label, p)) = self.history.undo.pop() else { return false };
let edited = commands::text_edit::active_editor_snapshot(self);
let cur = std::mem::replace(&mut self.project, p);
self.keep_view_settings(&cur);
self.history.redo.push((label, cur));
self.history.merge_key = None;
self.sanitize_after_replacement(edited.as_ref());
self.bump();
true
}
/// Redoes one step: the current project goes back onto the undo stack, per-comp Resolution is
/// kept, the merge key is cleared, selections are sanitized for the replaced state (a changed
/// text document starts a new IME epoch) and the session is bumped. Returns `false`, changing
/// nothing, when there is nothing to redo.
pub fn redo(&mut self) -> bool {
let Some((label, p)) = self.history.redo.pop() else { return false };
let edited = commands::text_edit::active_editor_snapshot(self);
let cur = std::mem::replace(&mut self.project, p);
self.keep_view_settings(&cur);
self.history.undo.push((label, cur));
self.history.merge_key = None;
self.sanitize_after_replacement(edited.as_ref());
self.bump();
true
}
/// Keep selections valid after the project was replaced by another state (undo, redo, a
/// history jump, a rollback): the same layer id can name a different document, so the
/// on-canvas editor gets a fresh IME epoch only when its own document changed.
///
/// Normally `before` is [`commands::text_edit::active_editor_snapshot`] taken from the
/// state this call is about to replace. Atomic batch rollback is the exception: it has
/// already restored the pre-batch state and passes the snapshot of the failing intermediate
/// state, so a transient restart or component switch inside the batch still rejects reviving
/// the old composition. A restored state that still has the same composition, layer and
/// editor session and shows byte/style-equivalent text (an opacity or other property undo)
/// keeps the editor's owner and selection; a different document, comp, layer or session clamps the
/// selection and starts a new epoch. A closed editor stays closed, and a fallback comp's
/// matching layer id never inherits the old comp's session. `None` means no editor was open
/// when the snapshot was taken; if one is open after the replacement it is treated as an
/// unverified document replacement, so it never inherits an old composition.
pub fn sanitize_after_replacement(&mut self, before: Option<&commands::text_edit::EditorSnapshot>) {
self.sanitize_state();
commands::text_edit::after_replacement(self, before);
}
/// Drop selections that no longer exist. Each comp keeps its own selection (#1001); a layer id
/// counts only inside the comp that owns it, so the active comp never sees another comp's layers.
pub fn sanitize_state(&mut self) {
let p = self.project.clone();
self.state.open_comps.retain(|c| p.comp(*c).is_some());
self.state.comp_selections.retain(|cid, sel| {
let Some(c) = p.comp(*cid) else { return false };
let ids: Vec<LayerId> = c.layers.iter().map(|l| l.id).collect();
sel.layers.retain(|l| ids.contains(l));
sel.props.retain(|(l, _)| ids.contains(l));
sel.keys.retain(|k| ids.contains(&k.layer));
sel.vertices.retain(|v| ids.contains(&v.layer));
!sel.is_empty()
});
if self.state.active_comp.is_some_and(|c| p.comp(c).is_none()) {
self.clear_live_selection();
// A matching layer id in the fallback comp is not the document being edited.
self.state.text_edit = None;
self.state.active_comp = self.state.open_comps.first().copied();
if let Some(id) = self.state.active_comp {
self.recall_selection(id);
}
}
if let Some(c) = self.active_comp() {
let ids: Vec<LayerId> = c.layers.iter().map(|l| l.id).collect();
self.state.selected_layers.retain(|l| ids.contains(l));
self.state.selected_props.retain(|(l, _)| ids.contains(l));
self.state.selected_keys.retain(|k| ids.contains(&k.layer));
self.state.selected_vertices.retain(|v| ids.contains(&v.layer));
}
if let Some((l, t)) = self.state.current_track
&& self.active_comp().and_then(|c| c.layer(l)).and_then(|l| l.tracker(t)).is_none()
{
self.state.current_track = None;
}
self.state.project_selection.retain(|i| p.item(*i).is_some());
commands::text_edit::sanitize(self);
}
pub fn is_dirty(&self) -> bool {
self.revision != self.saved_revision
}
/// The project as it is now is the saved one (after opening or saving it).
pub fn mark_saved(&mut self) {
self.saved_project = self.project.clone();
self.saved_revision = self.revision;
}
/// The project has changes its file doesn't (a session restored with unsaved changes): it
/// stays modified until it is saved, whatever is undone.
pub fn mark_unsaved(&mut self) {
self.saved_project = Arc::new(Project::default());
self.bump();
}
pub fn active_comp(&self) -> Option<&Comp> {
self.project.comp(self.state.active_comp?)
}
/// [`Session::active_comp`] as a shared snapshot (an `Arc` clone, not a deep copy).
pub fn active_comp_arc(&self) -> Option<std::sync::Arc<Comp>> {
self.project.comp_arc(self.state.active_comp?)
}
pub fn active_comp_id(&self) -> Option<ItemId> {
self.state.active_comp.filter(|c| self.project.comp(*c).is_some())
}
/// Current time of a comp.
pub fn time_of(&self, comp: ItemId) -> Tick {
self.state.times.get(&comp).copied().unwrap_or(Tick::ZERO)
}
/// Current time of the active comp.
pub fn time(&self) -> Tick {
self.state.active_comp.and_then(|c| self.state.times.get(&c).copied()).unwrap_or(Tick::ZERO)
}
/// Move the active comp's current time.
///
/// Time is an external boundary for the on-canvas text editor too: an animated Source Text
/// can show a different document at another time. The document is snapshotted only while an
/// editor is open, so playback with no text editor does no text copying.
pub fn set_time(&mut self, t: Tick) {
if let Some(c) = self.state.active_comp {
let t = self.project.comp(c).map_or(t, |comp| comp_frame_at(comp, t));
let edited = commands::text_edit::active_editor_snapshot(self);
self.state.times.insert(c, t);
if self.prefs.general.sync_time_related_items {
// Direct call: this `set_time` owns the editor snapshot for both time changes,
// so a synced move does not take a second snapshot or start a second epoch.
self.sync_related_times_inner(c, t);
}
commands::text_edit::after_external_change(self, edited.as_ref());
}
}
/// Settings ▸ General ▸ Synchronize Time of All Related Items: moving the current time of
/// `comp` moves the current time of the comps nested in it (through their precomp layers'
/// timing) and of the comps it is nested in, so every related viewer shows the same moment.
pub fn sync_related_times(&mut self, comp: ItemId, t: Tick) {
// Moving a related comp can move the active one, so the editor's document is checked
// here too; the snapshot is skipped entirely when no text editor is open.
let edited = commands::text_edit::active_editor_snapshot(self);
self.sync_related_times_inner(comp, t);
commands::text_edit::after_external_change(self, edited.as_ref());
}
/// Sets the time of every comp related to `comp` through precomp layers: down into the comps
/// it nests (through each layer's timing) and up into the comps nesting it. A seen-set keeps
/// cycles and diamonds finite; each found time is clamped to its comp's last frame, snapped to
/// the nearest frame and stored in `state.times`. The caller owns the text-editor boundary.
fn sync_related_times_inner(&mut self, comp: ItemId, t: Tick) {
let mut seen = std::collections::BTreeSet::from([comp]);
let mut todo = vec![(comp, t)];
let mut found = vec![];
while let Some((cid, ct)) = todo.pop() {
if cid != comp {
found.push((cid, ct));
}
let Some(c) = self.project.comp(cid) else { continue };
// Down: the comps this one nests.
for l in &c.layers {
if let effectcraft_project::LayerSource::Comp { item } = &l.source
&& seen.insert(*item)
{
todo.push((*item, l.layer_time(ct)));
}
}
// Up: the comps nesting this one.
for iid in self.project.items.keys() {
if let Some(pc) = self.project.comp(*iid)
&& let Some(l) = pc.layers.iter().find(|l| matches!(&l.source, effectcraft_project::LayerSource::Comp { item } if *item == cid))
&& seen.insert(*iid)
{
todo.push((*iid, l.comp_time(ct)));
}
}
}
for (cid, ct) in found {
if let Some(c) = self.project.comp(cid) {
let ct = c.frame_rate.snap_nearest(ct.clamp(Tick::ZERO, (c.duration - c.frame_duration()).max(Tick::ZERO)));
self.state.times.insert(cid, ct);
}
}
}
/// Make `id` the active comp, parking the previous comp's selection and restoring this one's.
pub fn activate_comp(&mut self, id: ItemId) {
if self.project.comp(id).is_none() || self.state.active_comp == Some(id) {
return;
}
self.remember_selection();
self.state.active_comp = Some(id);
self.recall_selection(id);
self.state.current_track = None;
// A text-edit session belongs to the comp that owned it. Switching comps ends it; even
// a same-numbered layer in the new comp must not inherit the old IME composition.
self.state.text_edit = None;
}
/// Leave no comp active, keeping the one that was active in [`EditorState::comp_selections`].
pub fn activate_comp_none(&mut self) {
self.remember_selection();
self.state.active_comp = None;
self.clear_live_selection();
self.state.current_track = None;
self.state.text_edit = None;
}
fn remember_selection(&mut self) {
let Some(id) = self.state.active_comp else { return };
let sel = CompSelection {
layers: self.state.selected_layers.clone(),
props: self.state.selected_props.clone(),
keys: self.state.selected_keys.clone(),
vertices: self.state.selected_vertices.clone(),
};
if sel.is_empty() {
self.state.comp_selections.remove(&id);
} else {
self.state.comp_selections.insert(id, sel);
}
}
fn recall_selection(&mut self, id: ItemId) {
match self.state.comp_selections.remove(&id) {
Some(sel) => {
self.state.selected_layers = sel.layers;
self.state.selected_props = sel.props;
self.state.selected_keys = sel.keys;
self.state.selected_vertices = sel.vertices;
}
None => self.clear_live_selection(),
}
}
fn clear_live_selection(&mut self) {
self.state.selected_layers.clear();
self.state.selected_props.clear();
self.state.selected_keys.clear();
self.state.selected_vertices.clear();
}
/// Open a comp in the viewer/timeline and make it active.
pub fn open_comp(&mut self, id: ItemId) {
if self.project.comp(id).is_none() {
return;
}
if !self.state.open_comps.contains(&id) {
self.state.open_comps.push(id);
}
if self.state.active_comp != Some(id) {
let previous = self.state.active_comp;
self.state.recent_comps.retain(|c| *c != id && Some(*c) != previous);
if let Some(previous) = previous {
self.state.recent_comps.insert(0, previous);
self.state.recent_comps.truncate(32);
}
}
self.activate_comp(id);
self.events.push(Event::OpenComp(id));
}
/// The open compositions and their current times, as a project file records them
/// ([`effectcraft_project::SavedView`]).
pub fn saved_view(&self) -> effectcraft_project::SavedView {
let comp_times = self.state.times.iter().filter(|(id, _)| self.project.comp(**id).is_some()).map(|(id, t)| (*id, *t)).collect();
effectcraft_project::SavedView { active_comp: self.state.active_comp, open_comps: self.state.open_comps.clone(), comp_times }
}
/// Reopen the compositions a project file was saved with (#748), each at its saved current
/// time (#1714). Ids that no longer name a comp are skipped; with none left the project stays
/// on the comp [`Session::replace_project`] opened (its first), as files from before the view
/// was saved do.
pub fn restore_view(&mut self, view: &effectcraft_project::SavedView) {
for (id, t) in &view.comp_times {
if let Some(comp) = self.project.comp(*id) {
let t = comp_frame_at(comp, *t);
self.state.times.insert(*id, t);
}
}
let mut open: Vec<ItemId> = Vec::new();
for id in view.open_comps.iter().copied().filter(|id| self.project.comp(*id).is_some()) {
if !open.contains(&id) {
open.push(id);
}
}
let Some(active) = view.active_comp.filter(|id| self.project.comp(*id).is_some()).or_else(|| open.first().copied()) else { return };
self.state.open_comps = open;
self.open_comp(active);
}
pub fn toast(&mut self, msg: impl Into<String>) {
self.events.push(Event::Toast { message: msg.into(), error: false });
}
pub fn drain_events(&mut self) -> Vec<Event> {
std::mem::take(&mut self.events)
}
/// The 3D view camera of a comp's viewer (None = the active camera).
pub fn view_camera(&self, comp: ItemId) -> Option<effectcraft_render::three_d::CameraState> {
let c = self.project.comp(comp)?;
if !c.has_3d() {
return None;
}
self.state.views3d.get(&comp)?.override_camera(c.width as f64, c.height as f64)
}
/// Render a comp frame with the session's footage + expression hosts.
pub fn render(&self, comp: ItemId, t: Tick, opts: RenderOpts) -> Image {
self.renderer(opts).comp_frame(comp, t)
}
/// The renderer [`Session::render`] uses: the session's footage, expressions, layer cache and
/// accelerator, and the render prefs (nested switches, draft shadows) over `opts`.
pub fn renderer(&self, opts: RenderOpts) -> Renderer<'_> {
let opts = RenderOpts { nested_switches: self.prefs.general.switches_affect_nested_comps, draft_shadows: self.prefs.three_d.realtime_shadows, ..opts };
let mut r = Renderer::new(&self.project, self.footage.as_ref(), opts);
r.expr = self.expr.as_deref();
r.cache = Some(&self.layer_cache);
r.accel = self.accel.as_deref();
r
}
/// Resolve a comp reference (item id number or name; `None`/null = the active comp).
pub fn resolve_comp(&self, comp: Option<&Value>) -> Result<ItemId> {
let p = match comp {
Some(v) if !v.is_null() => serde_json::json!({ "comp": v }),
_ => serde_json::json!({}),
};
commands::comp_id(self, &p)
}
/// Render a comp frame (comp time `t`) as opaque 8-bit RGBA over the comp background, scaled
/// so the longest side is at most `max_side` pixels (0 = full size). Returns (width, height, rgba).
pub fn render_rgba8(&self, comp: ItemId, t: Tick, max_side: u32) -> Result<(u32, u32, Vec<u8>)> {
let c = self.project.comp(comp).ok_or(EngineError::NoComp)?;
let long = c.width.max(c.height).max(1) as f64;
let scale = if max_side == 0 { 1.0 } else { (max_side as f64 / long).min(1.0) };
let img = self.render(comp, t, RenderOpts { scale, backend: effectcraft_render::Backend::Auto, ..Default::default() });
Ok((img.width, img.height, img.to_rgba8_over(c.background)))
}
/// A Project panel thumbnail of an item (a comp at `t`, footage at its first frame), longest
/// side at most `max_side`, as a job that owns everything it reads: frontends run it off the
/// UI thread (a big comp takes far longer than a frame). `None` for items without pixels.
pub fn thumbnail_job(&self, item: ItemId, t: Tick, max_side: u32) -> Option<ThumbnailJob> {
let it = self.project.item(item)?;
let footage = self.footage.clone();
match &it.kind {
effectcraft_project::ItemKind::Comp(c) => {
let (project, expr, cache) = (self.project.clone(), self.expr.clone(), self.layer_cache.clone());
let long = c.width.max(c.height).max(1) as f64;
let scale = if max_side == 0 { 1.0 } else { (max_side as f64 / long).min(1.0) };
let opts = RenderOpts {
scale,
nested_switches: self.prefs.general.switches_affect_nested_comps,
draft_shadows: self.prefs.three_d.realtime_shadows,
..Default::default()
};
let bg = c.background;
Some(Box::new(move || {
let mut r = Renderer::new(&project, footage.as_ref(), opts);
r.expr = expr.as_deref();
r.cache = Some(&cache);
let img = r.comp_frame(item, t);
Some((img.width, img.height, img.to_rgba8_over(bg)))
}))
}
effectcraft_project::ItemKind::Footage(f) if f.has_video => {
let f = f.clone();
Some(Box::new(move || {
let img = footage.frame(item, &f, Tick(0))?;
// Point-sample down to at most `max_side` on the long side.
let step = (img.width.max(img.height) as f32 / max_side.max(1) as f32).ceil().max(1.0) as u32;
let (w, h) = (img.width.div_ceil(step), img.height.div_ceil(step));
let full = img.to_rgba8();
let mut px = Vec::with_capacity((w * h * 4) as usize);
for y in 0..h {
for x in 0..w {
let i = (((y * step) * img.width + x * step) * 4) as usize;
px.extend_from_slice(&full[i..i + 4]);
}
}
Some((w, h, px))
}))
}
_ => None,
}
}
/// [`Session::render_rgba8`], or with `transparent` the frame's own straight alpha (what a
/// render with RGB + Alpha channels writes) instead of compositing over the background.
pub fn render_rgba8_alpha(&self, comp: ItemId, t: Tick, max_side: u32, transparent: bool) -> Result<(u32, u32, Vec<u8>)> {
if !transparent {
return self.render_rgba8(comp, t, max_side);
}
let c = self.project.comp(comp).ok_or(EngineError::NoComp)?;
let long = c.width.max(c.height).max(1) as f64;
let scale = if max_side == 0 { 1.0 } else { (max_side as f64 / long).min(1.0) };
let img = self.render(comp, t, RenderOpts { scale, backend: effectcraft_render::Backend::Auto, ..Default::default() });
Ok((img.width, img.height, img.to_rgba8()))
}
/// Make the media layer and the layer cache let go of what they decoded from `footage`'s
/// files (it keys frames by path, so an overwritten file would keep showing its old pixels).
pub(crate) fn forget_decoded(&self, footage: &effectcraft_project::Footage) {
for p in std::iter::once(&footage.path).chain(&footage.sequence) {
self.footage.forget(p);
}
self.layer_cache.clear();
}
/// Replace the whole project (open/new), resetting history and state.
pub fn replace_project(&mut self, mut p: Project, path: Option<String>) {
if self.stop_render()
&& let Some(mut job) = self.render_job.take()
{
// Let the worker notice the cancel; its updates refer to the old project.
job.wait();
}
self.render_job = None;
self.stored_paths = Default::default();
self.stop_track();
self.track_job = None;
self.stop_mask_track();
self.mask_job = None;
self.stop_warp();
self.warp_job = None;
self.warp_pending.clear();
self.stop_camera();
self.camera_job = None;
self.camera_pending.clear();
self.stop_roto();
self.roto_job = None;
self.roto_pending.clear();
self.drop_tasks();
self.script_ui.project_epoch = self.script_ui.project_epoch.wrapping_add(1);
p.fix_next_id();
upgrade_effects(&mut p);
// The media layer keys decoded frames by path: files of the new project may have changed
// since an earlier project decoded them (#1070).
for it in p.items.values() {
if let effectcraft_project::ItemKind::Footage(f) = &it.kind {
self.forget_decoded(f);
}
}
self.layer_cache.clear();
self.project = Arc::new(p);
// Its files may have changed since they were last stamped.
self.disk_salt = None;
self.history = History::default();
self.state = EditorState { snapping: true, view_layout: 1, ..Default::default() };
self.path = path;
self.bump();
self.mark_saved();
let first = self.project.comps().next().map(|(id, _)| *id);
if let Some(c) = first {
self.open_comp(c);
}
}
}
/// Bring effect instances saved by earlier versions up to date with the effect registry
/// (renamed / regrouped / added parameters, reordered popups; see
/// [`effectcraft_effects::migrate`]), and a project from before
/// [`effectcraft_project::SCHEMA_EFFECT_SPACE`] into effect space
/// ([`effectcraft_effects::migrate::to_effect_space`]). Stamps the current schema.
pub fn upgrade_effects(p: &mut Project) {
let to_effect_space = p.schema < effectcraft_project::SCHEMA_EFFECT_SPACE;
// Effect bounds per layer: (size, top-left in layer coordinates).
let mut bounds = std::collections::HashMap::new();
for (cid, c) in p.comps() {
for l in &c.layers {
bounds.insert((*cid, l.id), effectcraft_render::effect_bounds(p, c, l));
}
}
let mut next = p.next_id;
for (cid, it) in p.items.iter_mut() {
let effectcraft_project::ItemKind::Comp(c) = &mut it.kind else { continue };
for l in &mut std::sync::Arc::make_mut(c).layers {
let (size, origin) = bounds.get(&(*cid, l.id)).copied().unwrap_or(([100.0, 100.0], [0.0; 2]));
// Effect space starts at the bounds' top-left: positions move by minus that corner.
// Adjustment layers run their effects on the comp below as it is: nothing moves.
let shift = |o: [f64; 2]| [-o[0], -o[1]];
let d = if l.switches.adjustment { [0.0; 2] } else { shift(origin) };
let clone_d = |src: Option<u64>| match src {
Some(id) => bounds.get(&(*cid, effectcraft_project::LayerId(id))).map_or([0.0; 2], |b| shift(b.1)),
None => d,
};
let Some(fx) = l.props.sub_mut("effects") else { continue };
for n in &mut fx.children {
let effectcraft_project::Node::Group(g) = n else { continue };
let effectcraft_project::GroupKind::Effect { effect } = &g.kind else { continue };
if let Some(spec) = effectcraft_effects::find(effect) {
effectcraft_effects::migrate::upgrade_instance(spec, g, &mut effectcraft_project::build::Ids(&mut next), size);
if to_effect_space {
effectcraft_effects::migrate::to_effect_space(spec, g, size, d, &clone_d);
}
}
}
}
}
p.next_id = next;
p.schema = effectcraft_project::SCHEMA_VERSION;
}
pub use edit::upgrade_effects;
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use super::*;
/// `t` as a current time of `comp`: a frame within its duration.
fn comp_frame_at(comp: &Comp, t: Tick) -> Tick {
comp.frame_rate.snap_nearest(t.min(comp.duration - comp.frame_duration()).max(Tick::ZERO))
}
impl Session {
/// Keep selections valid after the project was replaced by another state (undo, redo, a
/// history jump, a rollback): the same layer id can name a different document, so the
/// on-canvas editor gets a fresh IME epoch only when its own document changed.
///
/// Normally `before` is [`commands::text_edit::active_editor_snapshot`] taken from the
/// state this call is about to replace. Atomic batch rollback is the exception: it has
/// already restored the pre-batch state and passes the snapshot of the failing intermediate
/// state, so a transient restart or component switch inside the batch still rejects reviving
/// the old composition. A restored state that still has the same composition, layer and
/// editor session and shows byte/style-equivalent text (an opacity or other property undo)
/// keeps the editor's owner and selection; a different document, comp, layer or session clamps the
/// selection and starts a new epoch. A closed editor stays closed, and a fallback comp's
/// matching layer id never inherits the old comp's session. `None` means no editor was open
/// when the snapshot was taken; if one is open after the replacement it is treated as an
/// unverified document replacement, so it never inherits an old composition.
pub fn sanitize_after_replacement(&mut self, before: Option<&commands::text_edit::EditorSnapshot>) {
self.sanitize_state();
commands::text_edit::after_replacement(self, before);
}
/// Drop selections that no longer exist. Each comp keeps its own selection (#1001); a layer id
/// counts only inside the comp that owns it, so the active comp never sees another comp's layers.
pub fn sanitize_state(&mut self) {
let p = self.project.clone();
self.state.open_comps.retain(|c| p.comp(*c).is_some());
self.state.comp_selections.retain(|cid, sel| {
let Some(c) = p.comp(*cid) else { return false };
let ids: Vec<LayerId> = c.layers.iter().map(|l| l.id).collect();
sel.layers.retain(|l| ids.contains(l));
sel.props.retain(|(l, _)| ids.contains(l));
sel.keys.retain(|k| ids.contains(&k.layer));
sel.vertices.retain(|v| ids.contains(&v.layer));
!sel.is_empty()
});
if self.state.active_comp.is_some_and(|c| p.comp(c).is_none()) {
self.clear_live_selection();
// A matching layer id in the fallback comp is not the document being edited.
self.state.text_edit = None;
self.state.active_comp = self.state.open_comps.first().copied();
if let Some(id) = self.state.active_comp {
self.recall_selection(id);
}
}
if let Some(c) = self.active_comp() {
let ids: Vec<LayerId> = c.layers.iter().map(|l| l.id).collect();
self.state.selected_layers.retain(|l| ids.contains(l));
self.state.selected_props.retain(|(l, _)| ids.contains(l));
self.state.selected_keys.retain(|k| ids.contains(&k.layer));
self.state.selected_vertices.retain(|v| ids.contains(&v.layer));
}
if let Some((l, t)) = self.state.current_track
&& self.active_comp().and_then(|c| c.layer(l)).and_then(|l| l.tracker(t)).is_none()
{
self.state.current_track = None;
}
self.state.project_selection.retain(|i| p.item(*i).is_some());
commands::text_edit::sanitize(self);
}
pub fn active_comp(&self) -> Option<&Comp> {
self.project.comp(self.state.active_comp?)
}
/// [`Session::active_comp`] as a shared snapshot (an `Arc` clone, not a deep copy).
pub fn active_comp_arc(&self) -> Option<std::sync::Arc<Comp>> {
self.project.comp_arc(self.state.active_comp?)
}
pub fn active_comp_id(&self) -> Option<ItemId> {
self.state.active_comp.filter(|c| self.project.comp(*c).is_some())
}
/// Current time of a comp.
pub fn time_of(&self, comp: ItemId) -> Tick {
self.state.times.get(&comp).copied().unwrap_or(Tick::ZERO)
}
/// Current time of the active comp.
pub fn time(&self) -> Tick {
self.state.active_comp.and_then(|c| self.state.times.get(&c).copied()).unwrap_or(Tick::ZERO)
}
/// Move the active comp's current time.
///
/// Time is an external boundary for the on-canvas text editor too: an animated Source Text
/// can show a different document at another time. The document is snapshotted only while an
/// editor is open, so playback with no text editor does no text copying.
pub fn set_time(&mut self, t: Tick) {
if let Some(c) = self.state.active_comp {
let t = self.project.comp(c).map_or(t, |comp| comp_frame_at(comp, t));
let edited = commands::text_edit::active_editor_snapshot(self);
self.state.times.insert(c, t);
if self.prefs.general.sync_time_related_items {
// Direct call: this `set_time` owns the editor snapshot for both time changes,
// so a synced move does not take a second snapshot or start a second epoch.
self.sync_related_times_inner(c, t);
}
commands::text_edit::after_external_change(self, edited.as_ref());
}
}
/// Settings ▸ General ▸ Synchronize Time of All Related Items: moving the current time of
/// `comp` moves the current time of the comps nested in it (through their precomp layers'
/// timing) and of the comps it is nested in, so every related viewer shows the same moment.
pub fn sync_related_times(&mut self, comp: ItemId, t: Tick) {
// Moving a related comp can move the active one, so the editor's document is checked
// here too; the snapshot is skipped entirely when no text editor is open.
let edited = commands::text_edit::active_editor_snapshot(self);
self.sync_related_times_inner(comp, t);
commands::text_edit::after_external_change(self, edited.as_ref());
}
/// Sets the time of every comp related to `comp` through precomp layers: down into the comps
/// it nests (through each layer's timing) and up into the comps nesting it. A seen-set keeps
/// cycles and diamonds finite; each found time is clamped to its comp's last frame, snapped to
/// the nearest frame and stored in `state.times`. The caller owns the text-editor boundary.
fn sync_related_times_inner(&mut self, comp: ItemId, t: Tick) {
let mut seen = std::collections::BTreeSet::from([comp]);
let mut todo = vec![(comp, t)];
let mut found = vec![];
while let Some((cid, ct)) = todo.pop() {
if cid != comp {
found.push((cid, ct));
}
let Some(c) = self.project.comp(cid) else { continue };
// Down: the comps this one nests.
for l in &c.layers {
if let effectcraft_project::LayerSource::Comp { item } = &l.source
&& seen.insert(*item)
{
todo.push((*item, l.layer_time(ct)));
}
}
// Up: the comps nesting this one.
for iid in self.project.items.keys() {
if let Some(pc) = self.project.comp(*iid)
&& let Some(l) = pc.layers.iter().find(|l| matches!(&l.source, effectcraft_project::LayerSource::Comp { item } if *item == cid))
&& seen.insert(*iid)
{
todo.push((*iid, l.comp_time(ct)));
}
}
}
for (cid, ct) in found {
if let Some(c) = self.project.comp(cid) {
let ct = c.frame_rate.snap_nearest(ct.clamp(Tick::ZERO, (c.duration - c.frame_duration()).max(Tick::ZERO)));
self.state.times.insert(cid, ct);
}
}
}
/// Make `id` the active comp, parking the previous comp's selection and restoring this one's.
pub fn activate_comp(&mut self, id: ItemId) {
if self.project.comp(id).is_none() || self.state.active_comp == Some(id) {
return;
}
self.remember_selection();
self.state.active_comp = Some(id);
self.recall_selection(id);
self.state.current_track = None;
// A text-edit session belongs to the comp that owned it. Switching comps ends it; even
// a same-numbered layer in the new comp must not inherit the old IME composition.
self.state.text_edit = None;
}
/// Leave no comp active, keeping the one that was active in [`EditorState::comp_selections`].
pub fn activate_comp_none(&mut self) {
self.remember_selection();
self.state.active_comp = None;
self.clear_live_selection();
self.state.current_track = None;
self.state.text_edit = None;
}
fn remember_selection(&mut self) {
let Some(id) = self.state.active_comp else { return };
let sel = CompSelection {
layers: self.state.selected_layers.clone(),
props: self.state.selected_props.clone(),
keys: self.state.selected_keys.clone(),
vertices: self.state.selected_vertices.clone(),
};
if sel.is_empty() {
self.state.comp_selections.remove(&id);
} else {
self.state.comp_selections.insert(id, sel);
}
}
fn recall_selection(&mut self, id: ItemId) {
match self.state.comp_selections.remove(&id) {
Some(sel) => {
self.state.selected_layers = sel.layers;
self.state.selected_props = sel.props;
self.state.selected_keys = sel.keys;
self.state.selected_vertices = sel.vertices;
}
None => self.clear_live_selection(),
}
}
fn clear_live_selection(&mut self) {
self.state.selected_layers.clear();
self.state.selected_props.clear();
self.state.selected_keys.clear();
self.state.selected_vertices.clear();
}
/// Open a comp in the viewer/timeline and make it active.
pub fn open_comp(&mut self, id: ItemId) {
if self.project.comp(id).is_none() {
return;
}
if !self.state.open_comps.contains(&id) {
self.state.open_comps.push(id);
}
if self.state.active_comp != Some(id) {
let previous = self.state.active_comp;
self.state.recent_comps.retain(|c| *c != id && Some(*c) != previous);
if let Some(previous) = previous {
self.state.recent_comps.insert(0, previous);
self.state.recent_comps.truncate(32);
}
}
self.activate_comp(id);
self.events.push(Event::OpenComp(id));
}
/// The open compositions and their current times, as a project file records them
/// ([`effectcraft_project::SavedView`]).
pub fn saved_view(&self) -> effectcraft_project::SavedView {
let comp_times = self.state.times.iter().filter(|(id, _)| self.project.comp(**id).is_some()).map(|(id, t)| (*id, *t)).collect();
effectcraft_project::SavedView { active_comp: self.state.active_comp, open_comps: self.state.open_comps.clone(), comp_times }
}
/// Reopen the compositions a project file was saved with (#748), each at its saved current
/// time (#1714). Ids that no longer name a comp are skipped; with none left the project stays
/// on the comp [`Session::replace_project`] opened (its first), as files from before the view
/// was saved do.
pub fn restore_view(&mut self, view: &effectcraft_project::SavedView) {
for (id, t) in &view.comp_times {
if let Some(comp) = self.project.comp(*id) {
let t = comp_frame_at(comp, *t);
self.state.times.insert(*id, t);
}
}
let mut open: Vec<ItemId> = Vec::new();
for id in view.open_comps.iter().copied().filter(|id| self.project.comp(*id).is_some()) {
if !open.contains(&id) {
open.push(id);
}
}
let Some(active) = view.active_comp.filter(|id| self.project.comp(*id).is_some()).or_else(|| open.first().copied()) else { return };
self.state.open_comps = open;
self.open_comp(active);
}
/// The 3D view camera of a comp's viewer (None = the active camera).
pub fn view_camera(&self, comp: ItemId) -> Option<effectcraft_render::three_d::CameraState> {
let c = self.project.comp(comp)?;
if !c.has_3d() {
return None;
}
self.state.views3d.get(&comp)?.override_camera(c.width as f64, c.height as f64)
}
/// Resolve a comp reference (item id number or name; `None`/null = the active comp).
pub fn resolve_comp(&self, comp: Option<&Value>) -> Result<ItemId> {
let p = match comp {
Some(v) if !v.is_null() => serde_json::json!({ "comp": v }),
_ => serde_json::json!({}),
};
commands::comp_id(self, &p)
}
}
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use super::*;
impl Session {
pub fn new() -> Session {
Session::default()
}
/// Run a command by id.
pub fn execute(&mut self, id: &str, params: Value) -> Result<Value> {
let spec = commands::find(id).ok_or_else(|| EngineError::UnknownCommand(id.to_string()))?;
if let Err(why) = (spec.enabled)(self) {
// Explicit targets (agents, scripts) don't need a UI selection.
let explicit = (["layer", "layers", "prop", "keys"].iter().any(|k| params.get(k).is_some()) && commands::has_comp(self).is_ok())
|| ["item", "items"].iter().any(|k| params.get(k).is_some())
// An explicit composition (the enablement looks at the active one).
|| params.get("comp").is_some_and(|c| !c.is_null() && self.resolve_comp(Some(c)).is_ok());
if !explicit {
return Err(EngineError::Disabled(id.to_string(), why));
}
}
// Last-resort guard: a panicking command reports an error instead of crashing the app.
let r = guard::guarded(&format!("command `{id}`"), || (spec.run)(self, &params))?;
self.learn_observe(id, &params);
if spec.journal {
self.journal.push((id.to_string(), params));
if self.journal.len() > 10_000 {
self.journal.drain(..1000);
}
}
Ok(r)
}
/// [`Session::execute`] for agents and scripts (MCP, CLI, control channel): unknown top-level
/// parameters are rejected with the accepted keys instead of being silently ignored.
pub fn execute_checked(&mut self, id: &str, params: Value) -> Result<Value> {
let spec = commands::find(id).ok_or_else(|| EngineError::UnknownCommand(id.to_string()))?;
commands::check_params(spec, &params)?;
self.execute(id, params)
}
/// [`Session::execute`] for a command a script asked for (the JavaScript engine's
/// `app.run`, ScriptUI callbacks…). The command and everything it runs count as the script's:
/// it may not change the settings that limit scripts (Settings ▸ Scripting & Expressions ▸
/// Application Scripting), which only the user can, from the UI, CLI or control channel.
pub fn execute_for_script(&mut self, id: &str, params: Value) -> Result<Value> {
self.script_calls.0 = self.script_calls.0.saturating_add(1);
let r = self.execute(id, params);
self.script_calls.0 = self.script_calls.0.saturating_sub(1);
r
}
/// Whether the command running was issued by a script ([`Session::execute_for_script`]).
pub fn running_for_script(&self) -> bool {
self.script_calls.0 > 0
}
/// Whether `id` names a known command whose `enabled` predicate returns `Ok` for this session;
/// an unknown id or a predicate error reads as disabled.
pub fn is_enabled(&self, id: &str) -> bool {
commands::find(id).is_some_and(|c| (c.enabled)(self).is_ok())
}
pub fn toast(&mut self, msg: impl Into<String>) {
self.events.push(Event::Toast { message: msg.into(), error: false });
}
pub fn drain_events(&mut self) -> Vec<Event> {
std::mem::take(&mut self.events)
}
}
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use super::*;
impl Session {
/// Apply an undoable edit. `merge`: consecutive edits with the same key fold into one step.
///
/// Every edit is an external boundary for the on-canvas text editor: if it replaced the
/// document the editor is showing, the selection is clamped and the editor gets a fresh IME
/// epoch. The editor's own typing goes through `edit_text_doc`, which owns that
/// document and must not treat its own keystrokes as a replacement.
pub fn edit<T>(&mut self, label: &str, merge: Option<&str>, f: impl FnOnce(&mut Project, &mut EditorState) -> Result<T>) -> Result<T> {
let edited = commands::text_edit::active_editor_snapshot(self);
let out = self.edit_inner(label, merge, f)?;
commands::text_edit::after_external_change(self, edited.as_ref());
Ok(out)
}
/// [`Session::edit`] for the on-canvas editor's own text changes. Its document is the one
/// the editor owns, so a change here is typing, not a replacement behind the IME's back.
pub(crate) fn edit_text_doc<T>(&mut self, label: &str, merge: Option<&str>, f: impl FnOnce(&mut Project, &mut EditorState) -> Result<T>) -> Result<T> {
self.edit_inner(label, merge, f)
}
/// The shared body of [`Session::edit`] and [`Session::edit_text_doc`].
///
/// Runs `f` on a clone of the project and editor state, then synchronizes derived data (global
/// light and Essential Graphics), queues invalidated Warp Stabilizer/camera-tracker work and
/// Roto Brush instances needing re-propagation in the `*_pending` lists. If the clone has the same
/// content the project and history are left as they were (only editor-state changes from `f`
/// are kept) and no revision is bumped; otherwise the previous project is recorded as an
/// undo step under `label`, unless it merges with the current merge key (then the redo branch
/// is dropped). An `Err` from `f` propagates with the session unchanged.
fn edit_inner<T>(&mut self, label: &str, merge: Option<&str>, f: impl FnOnce(&mut Project, &mut EditorState) -> Result<T>) -> Result<T> {
let before = self.project.clone();
let mut p = (*self.project).clone();
let mut st = self.state.clone();
let r = f(&mut p, &mut st)?;
// Layer styles: one Global Light per comp, whichever layer edited it.
effectcraft_project::styles::sync_global_light(&before, &mut p);
// Essential Properties of precomp layers follow their comps' Essential Graphics.
effectcraft_project::essential::sync_project(&before, &mut p);
// Warp Stabilizer analyses made from other frames are cleared (and queued again).
for w in warp::invalidate(&before, &mut p) {
if !self.warp_pending.contains(&w) {
self.warp_pending.push(w);
}
}
// So are 3D Camera Tracker tracks (and solves made with other settings).
for w in camera_track::invalidate(&before, &mut p) {
if !self.camera_pending.contains(&w) {
self.camera_pending.push(w);
}
}
// Roto Brush Input Keys follow the frames; edited instances propagate again.
for r in roto::sync(&before, &mut p) {
if !self.roto_pending.contains(&r) {
self.roto_pending.push(r);
}
}
// Nothing changed (a value set to what it already was): no undo step, not modified.
if p.same_content(&before) {
self.state = st;
return Ok(r);
}
let same = merge.is_some() && merge.map(str::to_string) == self.history.merge_key;
if !same {
// Undone steps aren't lost: they stay in the History panel as a branch.
let levels = self.prefs.general.undo_levels.max(1) as usize;
self.history.record(label, before, levels);
} else {
self.history.abandon_redo(&before);
}
self.history.merge_key = merge.map(str::to_string);
self.project = Arc::new(p);
self.state = st;
self.bump();
Ok(r)
}
/// Note a change to the on-canvas editor's committed text or session.
///
/// Frontends compare this with [`commands::text_edit::ime_stamp_revision`]; an unrelated
/// project change must not advance it.
pub(crate) fn note_text_edit_change(&mut self) {
// Checked process-wide allocation: a stamp is never wrapped or reused. On exhaustion
// keep the previous value; an unavailable before/after pair then compares equal and
// earns no receipt instead of accepting a stale revision.
if let Some(revision) = commands::text_edit::next_ime_revision() {
self.ime_revision = self.ime_revision.max(revision);
}
}
pub fn bump(&mut self) {
self.revision += 1;
// Back at the saved state (undo, redo, a history jump or a rolled-back batch).
if Arc::ptr_eq(&self.project, &self.saved_project) {
self.saved_revision = self.revision;
}
self.refresh_disk_salt(false);
self.events.push(Event::ProjectChanged { revision: self.revision });
}
/// Salt the disk cache's layer keys with the project's footage files
/// ([`effectcraft_render::disk_cache::footage_salt`]). Taking it reads the size and time of
/// every file, every frame of an image sequence included, so it is taken again only when the
/// footage items changed, or with `force` (a project opened, footage reloaded, the disk cache
/// attached), not at every edit: with a few large sequences that cost each keystroke in a
/// text field over half a second (#1926).
pub fn refresh_disk_salt(&mut self, force: bool) -> Option<u64> {
use std::hash::{Hash, Hasher};
if self.disk_cache.is_none() {
self.disk_salt = None;
return None;
}
let mut h = std::collections::hash_map::DefaultHasher::new();
for (id, it) in &self.project.items {
if let effectcraft_project::ItemKind::Footage(f) = &it.kind {
id.hash(&mut h);
format!("{f:?}").hash(&mut h);
}
}
let footage = h.finish();
if let Some((seen, salt)) = self.disk_salt
&& seen == footage
&& !force
{
return Some(salt);
}
let salt = effectcraft_render::disk_cache::footage_salt(&self.project);
self.disk_salt = Some((footage, salt));
self.layer_cache.set_disk_salt(salt);
Some(salt)
}
/// Set a comp's Resolution. As in After Effects it is saved with the project (which becomes
/// modified) but is no undo step, and it changes no pixels: the comp's cached frames stay
/// valid ([`effectcraft_project::Comp::same_pixels`]).
pub fn set_resolution(&mut self, comp: ItemId, r: effectcraft_project::Resolution) -> Result<()> {
if self.project.comp(comp).ok_or(EngineError::NoComp)?.resolution == r {
return Ok(());
}
Arc::make_mut(&mut self.project).comp_mut(comp).ok_or(EngineError::NoComp)?.resolution = r;
self.bump();
Ok(())
}
/// Keep what lives outside the undo history (each comp's Resolution) as it is in `from`, the
/// project before undo, redo or a history jump restored another state.
pub(crate) fn keep_view_settings(&mut self, from: &Project) {
let keep: Vec<(ItemId, effectcraft_project::Resolution)> =
self.project.comps().filter_map(|(id, c)| from.comp(*id).map(|f| (*id, f.resolution)).filter(|(_, r)| *r != c.resolution)).collect();
if keep.is_empty() {
return;
}
let p = Arc::make_mut(&mut self.project);
for (id, r) in keep {
if let Some(c) = p.comp_mut(id) {
c.resolution = r;
}
}
}
/// Undoes one step: the current project goes onto the redo stack, per-comp Resolution is kept
/// as it was, the merge key is cleared, selections are sanitized for the replaced state (the
/// on-canvas editor gets a new IME epoch only when its own document changed) and the session is
/// bumped. Returns `false`, changing nothing, when there is nothing to undo.
pub fn undo(&mut self) -> bool {
let Some((label, p)) = self.history.undo.pop() else { return false };
let edited = commands::text_edit::active_editor_snapshot(self);
let cur = std::mem::replace(&mut self.project, p);
self.keep_view_settings(&cur);
self.history.redo.push((label, cur));
self.history.merge_key = None;
self.sanitize_after_replacement(edited.as_ref());
self.bump();
true
}
/// Redoes one step: the current project goes back onto the undo stack, per-comp Resolution is
/// kept, the merge key is cleared, selections are sanitized for the replaced state (a changed
/// text document starts a new IME epoch) and the session is bumped. Returns `false`, changing
/// nothing, when there is nothing to redo.
pub fn redo(&mut self) -> bool {
let Some((label, p)) = self.history.redo.pop() else { return false };
let edited = commands::text_edit::active_editor_snapshot(self);
let cur = std::mem::replace(&mut self.project, p);
self.keep_view_settings(&cur);
self.history.undo.push((label, cur));
self.history.merge_key = None;
self.sanitize_after_replacement(edited.as_ref());
self.bump();
true
}
pub fn is_dirty(&self) -> bool {
self.revision != self.saved_revision
}
/// The project as it is now is the saved one (after opening or saving it).
pub fn mark_saved(&mut self) {
self.saved_project = self.project.clone();
self.saved_revision = self.revision;
}
/// The project has changes its file doesn't (a session restored with unsaved changes): it
/// stays modified until it is saved, whatever is undone.
pub fn mark_unsaved(&mut self) {
self.saved_project = Arc::new(Project::default());
self.bump();
}
/// Replace the whole project (open/new), resetting history and state.
pub fn replace_project(&mut self, mut p: Project, path: Option<String>) {
if self.stop_render()
&& let Some(mut job) = self.render_job.take()
{
// Let the worker notice the cancel; its updates refer to the old project.
job.wait();
}
self.render_job = None;
self.stored_paths = Default::default();
self.stop_track();
self.track_job = None;
self.stop_mask_track();
self.mask_job = None;
self.stop_warp();
self.warp_job = None;
self.warp_pending.clear();
self.stop_camera();
self.camera_job = None;
self.camera_pending.clear();
self.stop_roto();
self.roto_job = None;
self.roto_pending.clear();
self.drop_tasks();
self.script_ui.project_epoch = self.script_ui.project_epoch.wrapping_add(1);
p.fix_next_id();
upgrade_effects(&mut p);
// The media layer keys decoded frames by path: files of the new project may have changed
// since an earlier project decoded them (#1070).
for it in p.items.values() {
if let effectcraft_project::ItemKind::Footage(f) = &it.kind {
self.forget_decoded(f);
}
}
self.layer_cache.clear();
self.project = Arc::new(p);
// Its files may have changed since they were last stamped.
self.disk_salt = None;
self.history = History::default();
self.state = EditorState { snapping: true, view_layout: 1, ..Default::default() };
self.path = path;
self.bump();
self.mark_saved();
let first = self.project.comps().next().map(|(id, _)| *id);
if let Some(c) = first {
self.open_comp(c);
}
}
}
/// Bring effect instances saved by earlier versions up to date with the effect registry
/// (renamed / regrouped / added parameters, reordered popups; see
/// [`effectcraft_effects::migrate`]), and a project from before
/// [`effectcraft_project::SCHEMA_EFFECT_SPACE`] into effect space
/// ([`effectcraft_effects::migrate::to_effect_space`]). Stamps the current schema.
pub fn upgrade_effects(p: &mut Project) {
let to_effect_space = p.schema < effectcraft_project::SCHEMA_EFFECT_SPACE;
// Effect bounds per layer: (size, top-left in layer coordinates).
let mut bounds = std::collections::HashMap::new();
for (cid, c) in p.comps() {
for l in &c.layers {
bounds.insert((*cid, l.id), effectcraft_render::effect_bounds(p, c, l));
}
}
let mut next = p.next_id;
for (cid, it) in p.items.iter_mut() {
let effectcraft_project::ItemKind::Comp(c) = &mut it.kind else { continue };
for l in &mut std::sync::Arc::make_mut(c).layers {
let (size, origin) = bounds.get(&(*cid, l.id)).copied().unwrap_or(([100.0, 100.0], [0.0; 2]));
// Effect space starts at the bounds' top-left: positions move by minus that corner.
// Adjustment layers run their effects on the comp below as it is: nothing moves.
let shift = |o: [f64; 2]| [-o[0], -o[1]];
let d = if l.switches.adjustment { [0.0; 2] } else { shift(origin) };
let clone_d = |src: Option<u64>| match src {
Some(id) => bounds.get(&(*cid, effectcraft_project::LayerId(id))).map_or([0.0; 2], |b| shift(b.1)),
None => d,
};
let Some(fx) = l.props.sub_mut("effects") else { continue };
for n in &mut fx.children {
let effectcraft_project::Node::Group(g) = n else { continue };
let effectcraft_project::GroupKind::Effect { effect } = &g.kind else { continue };
if let Some(spec) = effectcraft_effects::find(effect) {
effectcraft_effects::migrate::upgrade_instance(spec, g, &mut effectcraft_project::build::Ids(&mut next), size);
if to_effect_space {
effectcraft_effects::migrate::to_effect_space(spec, g, size, d, &clone_d);
}
}
}
}
}
p.next_id = next;
p.schema = effectcraft_project::SCHEMA_VERSION;
}
+99
View File
@@ -0,0 +1,99 @@
use super::*;
impl Session {
/// Render a comp frame with the session's footage + expression hosts.
pub fn render(&self, comp: ItemId, t: Tick, opts: RenderOpts) -> Image {
self.renderer(opts).comp_frame(comp, t)
}
/// The renderer [`Session::render`] uses: the session's footage, expressions, layer cache and
/// accelerator, and the render prefs (nested switches, draft shadows) over `opts`.
pub fn renderer(&self, opts: RenderOpts) -> Renderer<'_> {
let opts = RenderOpts { nested_switches: self.prefs.general.switches_affect_nested_comps, draft_shadows: self.prefs.three_d.realtime_shadows, ..opts };
let mut r = Renderer::new(&self.project, self.footage.as_ref(), opts);
r.expr = self.expr.as_deref();
r.cache = Some(&self.layer_cache);
r.accel = self.accel.as_deref();
r
}
/// Render a comp frame (comp time `t`) as opaque 8-bit RGBA over the comp background, scaled
/// so the longest side is at most `max_side` pixels (0 = full size). Returns (width, height, rgba).
pub fn render_rgba8(&self, comp: ItemId, t: Tick, max_side: u32) -> Result<(u32, u32, Vec<u8>)> {
let c = self.project.comp(comp).ok_or(EngineError::NoComp)?;
let long = c.width.max(c.height).max(1) as f64;
let scale = if max_side == 0 { 1.0 } else { (max_side as f64 / long).min(1.0) };
let img = self.render(comp, t, RenderOpts { scale, backend: effectcraft_render::Backend::Auto, ..Default::default() });
Ok((img.width, img.height, img.to_rgba8_over(c.background)))
}
/// A Project panel thumbnail of an item (a comp at `t`, footage at its first frame), longest
/// side at most `max_side`, as a job that owns everything it reads: frontends run it off the
/// UI thread (a big comp takes far longer than a frame). `None` for items without pixels.
pub fn thumbnail_job(&self, item: ItemId, t: Tick, max_side: u32) -> Option<ThumbnailJob> {
let it = self.project.item(item)?;
let footage = self.footage.clone();
match &it.kind {
effectcraft_project::ItemKind::Comp(c) => {
let (project, expr, cache) = (self.project.clone(), self.expr.clone(), self.layer_cache.clone());
let long = c.width.max(c.height).max(1) as f64;
let scale = if max_side == 0 { 1.0 } else { (max_side as f64 / long).min(1.0) };
let opts = RenderOpts {
scale,
nested_switches: self.prefs.general.switches_affect_nested_comps,
draft_shadows: self.prefs.three_d.realtime_shadows,
..Default::default()
};
let bg = c.background;
Some(Box::new(move || {
let mut r = Renderer::new(&project, footage.as_ref(), opts);
r.expr = expr.as_deref();
r.cache = Some(&cache);
let img = r.comp_frame(item, t);
Some((img.width, img.height, img.to_rgba8_over(bg)))
}))
}
effectcraft_project::ItemKind::Footage(f) if f.has_video => {
let f = f.clone();
Some(Box::new(move || {
let img = footage.frame(item, &f, Tick(0))?;
// Point-sample down to at most `max_side` on the long side.
let step = (img.width.max(img.height) as f32 / max_side.max(1) as f32).ceil().max(1.0) as u32;
let (w, h) = (img.width.div_ceil(step), img.height.div_ceil(step));
let full = img.to_rgba8();
let mut px = Vec::with_capacity((w * h * 4) as usize);
for y in 0..h {
for x in 0..w {
let i = (((y * step) * img.width + x * step) * 4) as usize;
px.extend_from_slice(&full[i..i + 4]);
}
}
Some((w, h, px))
}))
}
_ => None,
}
}
/// [`Session::render_rgba8`], or with `transparent` the frame's own straight alpha (what a
/// render with RGB + Alpha channels writes) instead of compositing over the background.
pub fn render_rgba8_alpha(&self, comp: ItemId, t: Tick, max_side: u32, transparent: bool) -> Result<(u32, u32, Vec<u8>)> {
if !transparent {
return self.render_rgba8(comp, t, max_side);
}
let c = self.project.comp(comp).ok_or(EngineError::NoComp)?;
let long = c.width.max(c.height).max(1) as f64;
let scale = if max_side == 0 { 1.0 } else { (max_side as f64 / long).min(1.0) };
let img = self.render(comp, t, RenderOpts { scale, backend: effectcraft_render::Backend::Auto, ..Default::default() });
Ok((img.width, img.height, img.to_rgba8()))
}
/// Make the media layer and the layer cache let go of what they decoded from `footage`'s
/// files (it keys frames by path, so an overwritten file would keep showing its old pixels).
pub(crate) fn forget_decoded(&self, footage: &effectcraft_project::Footage) {
for p in std::iter::once(&footage.path).chain(&footage.sequence) {
self.footage.forget(p);
}
self.layer_cache.clear();
}
}