fixed creating in

clips/admin.py

@@ -18,7 +18,7 @@ class ProjectAdmin(admin.ModelAdmin):
 
 @admin.register(Clip)
 class ClipAdmin(admin.ModelAdmin):
-    list_display = ("cid", "project", "name", "footage", "analysis")
+    list_display = ("cid", "project", "name")
     list_filter = ("project",)
 
 

clips/migrations/0014_multiple_analyses.py

@@ -0,0 +1,15 @@
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+    dependencies = [("clips", "0013_palette_track")]
+
+    operations = [
+        migrations.RemoveField(model_name="clip", name="analysis"),
+        migrations.RemoveField(model_name="clip", name="footage"),
+        migrations.AlterField(
+            model_name="project",
+            name="schema_version",
+            field=models.PositiveIntegerField(default=5),
+        ),
+    ]

clips/models.py

@@ -235,7 +235,7 @@ class Project(models.Model):
         settings.AUTH_USER_MODEL, blank=True, related_name="shared_projects",
     )
     name = models.CharField(max_length=200, default="untitled")
-    schema_version = models.PositiveIntegerField(default=4)
+    schema_version = models.PositiveIntegerField(default=5)
     seq = models.PositiveBigIntegerField(default=0)
     palette = models.CharField(max_length=64, default="arthur/default")
     created = models.DateTimeField(auto_now_add=True)
@@ -273,12 +273,6 @@ class Clip(models.Model):
     cid = models.SlugField(max_length=64)
     name = models.CharField(max_length=200, blank=True)
     order = models.IntegerField(default=0)
-    footage = models.ForeignKey(
-        Footage, null=True, blank=True, on_delete=models.SET_NULL, related_name="clips"
-    )
-    analysis = models.ForeignKey(
-        Analysis, null=True, blank=True, on_delete=models.SET_NULL, related_name="clips"
-    )
     blocks = models.ManyToManyField(
         Block, blank=True, related_name="clips",
         help_text="the tier-2 blocks this clip's channels name",

clips/tests/test_api.py

@@ -396,14 +396,25 @@ class DocumentTests(TestCase):
             ],
         }
 
-    def save(self, leaves=None, blocks=None):
+    def save(self, leaves=None, blocks=None, analyses=None):
         return self.put(f"/api/projects/{self.project.id}", {
             "name": "a project",
-            "clips": [{"cid": "c1", "name": "take", "analysis": self.analysis,
+            "clips": [{"cid": "c1", "name": "take",
+                       "analyses": [self.analysis] if analyses is None else analyses,
                        "leaves": leaves if leaves is not None else self.leaves(),
                        "blocks": blocks if blocks is not None else [self.block]}],
         })
 
+    def test_a_clip_declares_the_registered_analyses_its_blocks_name(self):
+        undeclared = self.save(analyses=[])
+        self.assertEqual(409, undeclared.status_code)
+        self.assertIn("every block", undeclared.json()["error"])
+
+        unknown = "sha256:" + "f" * 64
+        missing = self.save(analyses=[self.analysis, unknown])
+        self.assertEqual(409, missing.status_code)
+        self.assertEqual([unknown], missing.json()["missing"])
+
     def test_every_saved_symbol_is_listed_across_projects(self):
         leaves = self.leaves()
         leaves["clip/c1/symbol/sym~face"] = ["^ ", "~:name", "face", "~:frames", 12]
@@ -435,12 +446,12 @@ class DocumentTests(TestCase):
         self.assertEqual(5, len(response.json()["written"]))
 
         loaded = self.client.get(f"/api/projects/{self.project.id}").json()
-        self.assertEqual(4, loaded["schema_version"])
+        self.assertEqual(5, loaded["schema_version"])
         self.assertEqual(1, len(loaded["clips"]))
         clip = loaded["clips"][0]
         self.assertEqual("c1", clip["cid"])
         self.assertEqual([self.block], clip["blocks"])
-        self.assertEqual(self.analysis, clip["analysis"])
+        self.assertNotIn("analysis", clip)
         # The whole point: byte-identical values, including the integer frame keys
         # transit writes as "~i0". A JSON round trip that stringified them would
         # come back "0" and the part would hold its first pose forever.
@@ -542,7 +553,7 @@ class DocumentTests(TestCase):
     def patch(self, base, leaves, removed=()):
         return self.put(f"/api/projects/{self.project.id}", {
             "base": base,
-            "clips": [{"cid": "c1", "analysis": self.analysis, "leaves": leaves,
+            "clips": [{"cid": "c1", "analyses": [self.analysis], "leaves": leaves,
                        "removed": list(removed), "blocks": [self.block]}],
         })
 

clips/views.py

@@ -718,8 +718,6 @@ def _project_json(project: Project, user):
             {
                 "cid": clip.cid,
                 "name": clip.name,
-                "footage": str(clip.footage_id) if clip.footage_id else None,
-                "analysis": clip.analysis_id,
                 "blocks": sorted(clip.blocks.values_list("key", flat=True)),
                 "leaves": {leaf.path: leaf.value for leaf in leaves if leaf.path.startswith(prefix)},
             }
@@ -909,7 +907,19 @@ def _save(project: Project, data, user):
                 )
 
         keys = spec.get("blocks") or []
-        have = set(Block.objects.filter(key__in=keys).values_list("key", flat=True))
+        analyses = spec.get("analyses") or []
+        if (not isinstance(analyses, list)
+                or not all(isinstance(key, str) for key in analyses)
+                or len(analyses) != len(set(analyses))):
+            raise Bad("a clip's analyses must be a list of distinct analysis ids")
+        registered = set(Analysis.objects.filter(key__in=analyses)
+                         .values_list("key", flat=True))
+        if unknown := [key for key in analyses if key not in registered]:
+            raise Bad("this clip names analyses the server does not know; register them first",
+                      status=409, missing=unknown)
+
+        block_rows = list(Block.objects.filter(key__in=keys))
+        have = {block.key for block in block_rows}
         if missing := [k for k in keys if k not in have]:
             # Referential integrity across the tiers, enforced where it can be:
             # a document that names blocks the server does not hold would load
@@ -919,6 +929,9 @@ def _save(project: Project, data, user):
                 "before saving the document that points at them",
                 status=409, missing=missing,
             )
+        if undeclared := sorted({block.analysis_id for block in block_rows} - registered):
+            raise Bad("every block in a clip must name one of that clip's analyses",
+                      status=409, missing=undeclared)
 
         existing = {leaf.path: leaf for leaf in project.leaves.filter(path__startswith=prefix)}
         if base is not None:
@@ -930,16 +943,12 @@ def _save(project: Project, data, user):
             if conflicts:
                 continue
 
-        analysis = Analysis.objects.filter(key=spec.get("analysis")).first()
-        footage = None
-        if spec.get("footage"):
-            footage = Footage.objects.filter(id=spec["footage"]).first()
         clip, _ = Clip.objects.update_or_create(
             project=project,
             cid=cid,
-            defaults={"name": spec.get("name") or "", "analysis": analysis, "footage": footage},
+            defaults={"name": spec.get("name") or ""},
         )
-        blocks = Block.objects.filter(key__in=keys)
+        blocks = block_rows
         if base is None:
             clip.blocks.set(blocks)
             gone = [path for path in existing if path not in leaves]

docs/creating-in.md

@@ -72,6 +72,12 @@ Once resolved, every creation command follows the destination kind.
 - Selecting an existing cel changes the destination from the lane to the symbol
   placed by that cel; subsequent symbols and shapes become children there.
 
+Double-clicking a lane creates an empty cel at the playhead; beginning a drawing
+creates a drawing cel there. These are the same lane-creation operation with
+different payloads. The pointer chooses the lane, never a second creation time.
+The resulting cel is selected, so it immediately becomes the preferred target:
+drawing again enters that cel's symbol instead of replacing it.
+
 Thus no separate "new cel" versus "add inside" mode is needed. Selecting the
 lane header says new cel; selecting a cel says add inside.
 

frontend/src/arthur/domain/bring.cljs

@@ -11,6 +11,7 @@
   so the events that fetch them are only fetching."
   (:refer-clojure :exclude [take])
   (:require [arthur.domain.clip :as clip]
+            [arthur.domain.feature :as feature]
             [arthur.domain.node :as node]
             [clojure.string :as string]))
 
@@ -59,8 +60,8 @@
     (keyword (if (seq slug) slug "symbol"))))
 
 (defn take
-  "Put `frozen`, a take, into `clip` as ONE symbol called `label`. Returns
+  "Put `frozen`, a take, into `clip` as ONE symbol called `label`. Returns the
-  `{:clip :sid :tracked?}`.
+  changed clip, the imported symbol id and the old-to-scoped subject ids.
 
   `frozen` is what `flow/freeze/clip` makes: a `:main` that places one symbol per
   tracked face. `:main` becomes the named symbol — it is what holds the faces in
@@ -75,18 +76,22 @@
   symbols. `nest/audio-tracks` collapses simultaneous copies carrying the same
   `:media-link`; placing those faces at different times still schedules each one.
 
-  The tracking identities, and the analysis they were measured by, come along
+  The unique imported symbol id scopes every subject id. Thus two takes may both
-  only when `clip` has no analysis of its own and no face had to be renamed. A
+  arrive with detector subject `:face-1` without colliding in the document."
-  document holds one analysis, and regeneration finds a face's symbol by its
-  subject id, so either condition failing means the take comes in as drawings
-  that play but cannot be re-tuned — `:tracked? false` says so."
   [clip frozen label footage-id range]
-  (let [{c :clip ids :ids} (symbols clip frozen [:main] {:main (symbol-id label)})
+  (let [scope (fn [root subject] (keyword (str (name root) "." (name subject))))
+        root (clip/free-id
+              (fn [candidate]
+                (or (contains? (:symbols clip) candidate)
+                    (some #(contains? (:symbols clip) (scope candidate %))
+                          (keys (:subjects frozen)))))
+              (symbol-id label))
+        scoped (partial scope root)
+        wanted (into {:main root} (map (fn [subject] [subject (scoped subject)]))
+                     (keys (:subjects frozen)))
+        {c :clip ids :ids} (symbols clip frozen [:main] wanted)
         sid      (ids :main)
         faces    (mapv ids (sort-by str (keys (:subjects frozen))))
-        ;; Older/plain imported clips have no subject table. They are still a
-        ;; take, so their wrapper remains the only honest owner of the sound.
-        sound-hosts (if (seq faces) faces [sid])
         sound    {:id :sound :name "sound" :kind :audio :parent nil
                   :z "z-sound" :source {:footage footage-id}
                   ;; All automatic copies name one recording. The audio walk
@@ -96,18 +101,42 @@
                   ;; Source frame `start` plays on the symbol's 0.
                   :span range
                   :time {:mode :map :at (- (first range)) :rate 1}}
-        tracked? (and (nil? (:analysis clip))
+        feature-ids (into {}
-                      (every? #(= % (ids %)) (keys (:subjects frozen))))]
+                          (map (fn [[id f]]
+                                 [id (feature/owned (ids (:subject f)) (keyword (name id)))]))
+                          (:features frozen))
+        subjects (into {}
+                       (map (fn [[id subject]]
+                              (let [new-id (ids id)]
+                                [new-id (assoc subject :id new-id
+                                                       :footage footage-id)])))
+                       (:subjects frozen))
+        features (into {}
+                       (map (fn [[id f]]
+                              (let [new-id (feature-ids id)]
+                                [new-id (-> f
+                                            (assoc :id new-id
+                                                   :subject (ids (:subject f))
+                                                   :symbol (ids (:symbol f))))])))
+                       (:features frozen))
+        groups (into {}
+                     (map (fn [[id g]]
+                            (let [new-subject (ids (:subject g))
+                                  new-id (feature/owned new-subject (keyword (name id)))]
+                              [new-id (-> g
+                                          (assoc :id new-id :subject new-subject)
+                                          (update :members #(mapv feature-ids %)))])))
+                     (:groups frozen))]
     {:sid sid
-     :tracked? tracked?
+     :subject-ids (select-keys ids (keys (:subjects frozen)))
-     :clip (cond-> (-> (reduce (fn [document face]
+     :clip (-> (reduce (fn [document face]
                          (assoc-in document [:symbols face :nodes :sound] sound))
-                               c sound-hosts)
+                       c faces)
-                       (assoc-in [:symbols sid :name] (str label)))
+               (assoc-in [:symbols sid :name] (str label))
-             tracked? (-> (assoc :analysis (:analysis frozen))
+               (update :analyses merge (:analyses frozen))
-                          (update :subjects merge (:subjects frozen))
+               (update :subjects merge subjects)
-                          (update :features merge (:features frozen))
+               (update :features merge features)
-                          (update :groups merge (:groups frozen))))}))
+               (update :groups merge groups))}))
 
 
 (defn placed

frontend/src/arthur/domain/channel.cljs

@@ -364,7 +364,11 @@
           ;; Palette-choice channels interpolate identities into a blend
           ;; descriptor. The renderer keeps indexed geometry in the left
           ;; palette's bank and blends that bank's ramp toward the right one.
-          (and (= :palette (:semantic ch)) (keyword? a) (keyword? b))
+          ;; Palette ids are opaque identities. Built-ins happen to use
+          ;; keywords, while palettes made in the editor use UUIDs; treating
+          ;; the latter as numbers produces NaN and therefore the renderer's
+          ;; pink bad-data sentinel.
+          (and (= :palette (:semantic ch)) (some? a) (some? b))
           {:from a :to b :t t}
           (vector? a)
           (mapv (fn [x y] (+ x (* t (- y x)))) a b)
@@ -520,7 +524,7 @@
   (let [values (when (map? (:keys ch)) (vals (:keys ch)))
         first-value (first values)
         linear-values? (or (every? number? values)
-                           (and (= :palette (:semantic ch)) (every? keyword? values))
+                           (and (= :palette (:semantic ch)) (every? some? values))
                            (and (vector? first-value)
                                 (pos? (count first-value))
                                 (every? (fn [v] (and (vector? v)

frontend/src/arthur/domain/clip.cljs

@@ -4,7 +4,7 @@
       {:name      \"take\"
        :fps       30
        :width 320 :height 200
-       :analysis  {...}
+       :analyses  {analysis-id {...}}
        :subjects {...} :features {...} :groups {...}
        :symbols {:main {:id :main :frames 229 :nodes {...}}}}
 
@@ -51,7 +51,7 @@
   that loses something on every round trip, which is the one bug a persistence
   layer must not be able to have. Add the field here and to `leaf/leaves` and
   `leaf/clip` in the same commit."
-  #{:name :fps :analysis :subjects :features :groups :width :height :symbols
+  #{:name :fps :analyses :subjects :features :groups :width :height :symbols
     :palettes :default-palette})
 
 (defn symbol
@@ -264,7 +264,16 @@
               ;; A palette track has meaningful uncovered time. Ordinary held
               ;; channels clamp to their first key before it, but doing that
               ;; here would erase the gap before the first palette segment.
-              (let [track (:palette-channel owner)
+              (let [fallback (or (channel-value (:palette owner) frame)
+                                 inherited (:default palette))
+                    materialize (fn [choice]
+                                  (cond
+                                    (= pal/inherit choice) fallback
+                                    (map? choice) (-> choice
+                                                      (update :from #(if (= pal/inherit %) fallback %))
+                                                      (update :to #(if (= pal/inherit %) fallback %)))
+                                    :else choice))
+                    track (:palette-channel owner)
                     track-value (if-let [ks (:keys track)]
                                   (some->> (keys ks)
                                            (filter #(<= % frame))
@@ -286,12 +295,10 @@
                             choice (get-in palette-clip [:channels [:palette]])
                             start (some-> palette-clip node/placed-span first)]
                         (or (when (and choice start)
-                              (channel-value choice (- frame start)))
+                              (materialize (channel-value choice (- frame start))))
                             fallback)))
                     track-value
-                  (channel-value (:palette owner) frame)
+                  fallback)))
-                  inherited
-                  (:default palette))))
             (selection-at [owner frame inherited]
               (let [selection (:palette owner)
                     chosen (cond
@@ -574,6 +581,18 @@
       (str "clip has a field with no leaf to save it in: " (pr-str k)))
     (when-not (map? (:symbols clip))
       [":symbols must be a map of id -> symbol"])
+    (when (and (contains? clip :analyses) (not (map? (:analyses clip))))
+      [":analyses must be a map of analysis id -> analysis"])
+    (for [[id analysis] (:analyses clip)
+          :when (not= id (:id analysis))]
+      (str "analysis under key " (pr-str id) " has :id " (pr-str (:id analysis))))
+    (for [[id subject] (:subjects clip)
+          :when (not (contains? (:analyses clip) (:analysis subject)))]
+      (str "subject " (pr-str id) " names missing analysis "
+           (pr-str (:analysis subject))))
+    (for [[id subject] (:subjects clip)
+          :when (not (keyword? (:source-subject subject)))]
+      (str "subject " (pr-str id) " has no source subject"))
     (when (and (contains? clip :palettes) (not (map? (:palettes clip))))
       [":palettes must be a map of id -> palette"])
     (when (and (contains? clip :default-palette) (map? (:palettes clip))

frontend/src/arthur/domain/creation.cljs

@@ -6,20 +6,39 @@
   is actually available. See `docs/creating-in.md`."
   (:require [arthur.domain.clip :as clip]
             [arthur.domain.nest :as nest]
+            [arthur.domain.node :as node]
             [arthur.domain.symbol :as symbol]))
 
+(defn- path-node
+  "The node at the end of an occurrence `path`, walked from `open`.
+
+  Selection also carries an owner sid and node id for commands that edit the
+  node directly. Those are deliberately not used here: the path is the address
+  of the row as seen from the open symbol, and is the only part that describes
+  every enclosing occurrence at arbitrary depth."
+  [document open path]
+  (loop [sid open [id & more] (seq path) found nil]
+    (if-not id
+      found
+      (when-let [n (get-in document [:symbols sid :nodes id])]
+        (if (seq more)
+          (when-let [inner (and (= :instance (:kind n)) (node/source n))]
+            (recur inner more n))
+          n)))))
+
 (defn preferred-path
   "The container path structurally implied by `selection`.
 
   Selecting an instance means inside it. Selecting any other node means its
   containing symbol. An empty or non-node selection means the open symbol."
-  [document selection]
+  [document open selection]
-  (let [[kind sid id selected-path] selection
+  (let [[kind _sid id selected-path] selection
         path (when (= :node kind)
-               (vec (or (seq selected-path) (when id [id]))))]
+               (vec (or (seq selected-path) (when id [id]))))
+        selected (path-node document open path)]
     (cond
       (empty? path) []
-      (= :instance (get-in document [:symbols sid :nodes id :kind])) path
+      (= :instance (:kind selected)) path
       :else (vec (butlast path)))))
 
 (defn target
@@ -33,7 +52,7 @@
 
   Returns `{:kind :lane|:symbol :sid :path :frame :matrix :time}`."
   [document store open selection frame]
-  (let [preferred (preferred-path document selection)]
+  (let [preferred (preferred-path document open selection)]
     (some (fn [path]
             (when-let [inside (nest/inside document store open path frame)]
               (when-let [sid (:sid inside)]

frontend/src/arthur/domain/leaf.cljs

@@ -137,7 +137,7 @@
            (some-leaf (at "timing") (select-keys clip [:fps]))
            (some-leaf (at "stage")  (select-keys clip [:width :height]))
            (some-leaf (at "palette-default") (select-keys clip [:default-palette]))
-           (some-leaf (at "source") (:analysis clip))
+           (some-leaf (at "analyses") (:analyses clip))
            (concat
             (for [[id v] (:subjects clip)] {(at "subject" (segment id)) v})
             (for [[id v] (:features clip)] {(at "feature" (segment id)) v})
@@ -194,7 +194,7 @@
                "name"     (merge acc v)
                "timing"   (merge acc v)
                "stage"    (merge acc v)
-               "source"   (assoc acc :analysis v)
+               "analyses" (assoc acc :analyses v)
                "palette-default" (merge acc v)
                "palette"  (assoc-in acc [:palettes (unsegment a)] v)
                "subject"  (assoc-in acc [:subjects (unsegment a)] v)
@@ -237,7 +237,7 @@
                           false)
                         (case (count p)
                           ;; The clip's own facts carry no id.
-                          3 (#{"name" "timing" "stage" "source" "palette-default"} (nth p 2))
+                          3 (#{"name" "timing" "stage" "analyses" "palette-default"} (nth p 2))
                           4 (#{"subject" "feature" "group" "palette"} (nth p 2))
                           false))))]
     (vec

frontend/src/arthur/domain/node.cljs

@@ -99,15 +99,30 @@
                     (or (:dense c) (:generated c)))
                  [:pos :rot :scale])))
 
+(defn hold-only?
+  "Channels whose values are choices, not quantities.  Their keys may change at
+  a frame boundary but there is no meaningful value between two keys."
+  [path value]
+  (or (= path [:style :color])
+      (boolean? value)
+      (and (keyword? value) (not= path [:palette]))))
+
+(defn- enforce-hold [path c]
+  (if (and (= path [:style :color]) (:keys c))
+    (-> c (assoc :interp :hold) (dissoc :segments))
+    c))
+
 (defn set-channel
   "Write `v` into channel `path`: a key on the node's own frame `f` when the
   channel is keyed, its one value when it is not."
   [n path f v]
   (let [c (get (channels n) path)]
     (assoc-in n [:channels path]
+              (enforce-hold
+               path
                (if (:keys c)
                  (assoc-in c [:keys f] v)
-                (merge (select-keys c [:semantic]) (ch/framed v))))))
+                 (merge (select-keys c [:semantic]) (ch/framed v)))))))
 
 (defn set-keyed-channel
   "Write `v` as a key at `f`, starting an animated channel when needed. This is
@@ -116,10 +131,12 @@
   [n path f v]
   (let [c (get (channels n) path)]
     (assoc-in n [:channels path]
+              (enforce-hold
+               path
                (if (:keys c)
                  (assoc-in c [:keys f] v)
                  (merge (select-keys c [:semantic])
-                       (ch/keyed {f v} (if (or (boolean? v) (keyword? v)) :hold :linear)))))))
+                        (ch/keyed {f v} (if (hold-only? path v) :hold :linear))))))))
 
 (defn toggle-key
   "Key channel `path` on the node's own frame `f` with the value it has there, or
@@ -127,19 +144,22 @@
   the last one off leaves it that one value. A boolean holds; anything else tweens.
 
   `store` because the value it keys is read out of the channel, and a measured
-  channel's values live in tier 2."
+  channel's values live in tier 2.  Colour is always held even though current
+  documents store palette choices as numeric slot indices."
   [n path f store]
   (let [c  (get (channels n) path)
         v  (ch/value-at c f store)
         ks (dissoc (:keys c) f)]
     (assoc-in n [:channels path]
+              (enforce-hold
+               path
                (cond
                  (not (:keys c))               (merge (select-keys c [:semantic])
-                                                      (ch/keyed {f v} (if (or (boolean? v) (keyword? v)) :hold :linear)))
+                                                       (ch/keyed {f v} (if (hold-only? path v) :hold :linear)))
                  (not (contains? (:keys c) f)) (assoc-in c [:keys f] v)
                  (seq ks)                      (cond-> (assoc c :keys ks)
                                                  (:segments c) (update :segments dissoc f))
-                :else                         (ch/framed v)))))
+                 :else                         (ch/framed v))))))
 
 (defn set-segment-interp
   "Choose how channel `path`'s key at `left` leads to the next one: `:hold` cuts
@@ -147,7 +167,9 @@
   only a gap that exists, between a key and a later one, can be chosen."
   [n path left interp]
   (let [ks (:keys (get (channels n) path))]
-    (if (and (contains? ks left) (some #(< left %) (keys ks)) (#{:hold :linear} interp))
+    (if (and (contains? ks left) (some #(< left %) (keys ks))
+             (#{:hold :linear} interp)
+             (or (= :hold interp) (not (hold-only? path nil))))
       (assoc-in n [:channels path :segments left] interp)
       n)))
 

frontend/src/arthur/domain/palette.cljs

@@ -7,6 +7,7 @@
   are derived, never persisted: adding a palette never rewrites drawing data.")
 
 (def default-id :arthur/default)
+(def inherit :arthur.palette/inherit)
 
 (def entries
   [{:name :bg         :hex "#12141c"}

frontend/src/arthur/domain/project.cljs

@@ -29,9 +29,7 @@
   (:require [arthur.domain.leaf :as leaf]
             [arthur.domain.wire :as wire]))
 
-(def schema-version
+(def schema-version 5)
-  "4 separates a symbol's static authoring palette from its palette track."
-  4)
 
 (defn block-keys
   "Every tier-2 key a leaf map names, in a stable order."

frontend/src/arthur/domain/symbol.cljs

@@ -730,9 +730,7 @@
       (-> []
           (cond->
             (and (= :palette (:type sym)) (seq nodes))
-            (conj "a palette symbol cannot contain nodes")
+            (conj "a palette symbol cannot contain nodes"))
-            (and (= :palette (:type sym)) (nil? (:palette-ref sym)))
-            (conj "a palette symbol must point at a palette"))
           (into (for [[id n] nodes
                       :when  (not= id (:id n))]
                   (str "node under key " (pr-str id) " has :id " (pr-str (:id n)))))

frontend/src/arthur/events/footage.cljs

@@ -151,7 +151,8 @@
                                        :detector detector})
         _ (mark! "build-clip: freeze")
         built (:clip frozen)
-        source-blocks (source/pack-subjects (:id (:analysis built)) subjects)
+        analysis-id (-> built :analyses keys first)
+        source-blocks (source/pack-subjects analysis-id subjects)
         _ (mark! "build-clip: pack source blocks")]
     (assoc (select-keys built [:fps :width :height])
 
@@ -394,7 +395,10 @@
 
 (rf/reg-event-db
  ::choose
- (fn [db [_ id]] (assoc-in db [:footage :chosen] id)))
+ (fn [db [_ id]]
+   (-> db
+       (assoc-in [:footage :chosen] id)
+       (ui/selected [:footage id]))))
 
 ;; ---------------------------------------------------------------------------
 ;; renaming an asset
@@ -504,7 +508,7 @@
    (let [entry (store/entry (:clip/current db))
          uuid  (random-uuid)
          fps   (get-in db [:clip :fps])
-         {:keys [clip sid tracked?]}
+         {:keys [clip sid subject-ids]}
          (bring/take (:clip entry) (:clip built) name footage-id range)
          st    (merge (:store entry) (:store built))
          imported-frames (clip/output-frames clip sid)
@@ -525,9 +529,22 @@
                 (update :footage merge {:loading? false :status why}))}
        (let [db (edit/edit-entry
                  db
-                 #(cond-> (assoc % :clip (:clip result) :store st)
+                 #(let [analysis-id (-> built :clip :analyses keys first)
-                    tracked? (merge (select-keys built [:footage-id :source-blocks
+                        remap-subjects
-                                                        :source-inputs]))))]
+                        (fn [inputs]
+                          (update inputs :subjects
+                                  (fn [subjects]
+                                    (into {} (map (fn [[old new]] [new (get subjects old)]))
+                                          subject-ids))))]
+                    (-> (assoc % :clip (:clip result) :store st)
+                        (update-in [:sources analysis-id]
+                                   (fn [source]
+                                     {:footage-id (:footage-id built)
+                                      :source-blocks (:source-blocks built)
+                                      :source-inputs
+                                      (update (remap-subjects (:source-inputs built))
+                                              :subjects merge
+                                              (get-in source [:source-inputs :subjects]))})))))]
          {:db (-> db
                   (update :ui dissoc :convert)
                   (ui/selected
@@ -536,7 +553,5 @@
                           {:loading? false
                            :status (str "made " name " · " imported-frames " frames at " fps " fps"
                                         (when (not= fps source-fps)
-                                          (str " · sampled from " source-fps " fps"))
+                                          (str " · sampled from " source-fps " fps")))}))
-                                        (when-not tracked?
-                                          " · as drawings: this project already tracks other footage"))}))
           :dispatch [::pb/refresh-clock]})))))

frontend/src/arthur/events/project.cljs

@@ -102,15 +102,10 @@
         (.then (fn [^js created] (.-id created))))))
 
 (defn- opened-entry! [^js clip-json]
-  (let [footage-id (.-footage clip-json)]
   (-> (js/Promise.all
-         #js [(js/Promise.all
        (into-array (map #(http/GET (str "/api/blocks/" %))
                         (array-seq (.-blocks clip-json)))))
-              (if footage-id
+        (.then (fn [blocks]
-                (http/GET (str "/api/footage/" footage-id))
-                (js/Promise.resolve nil))])
-        (.then (fn [[blocks ^js footage]]
                  (let [cid (.-cid clip-json)
                        loaded (project/load
                                cid #js {:leaves (.-leaves clip-json)
@@ -129,11 +124,9 @@
                                        ;; write lands on what does not.
                                        :synced (project/tier1 (.-leaves clip-json))
                                        :clip built :store (:store loaded)
-                                       :footage-id footage-id
+                                       :audio "/static/arthur/audio.wav"})]
-                                       :audio (if footage (.-audio footage)
-                                                  "/static/arthur/audio.wav")})]
                      (-> (mix/mix! built (clip/opens-on built) (:audio entry) (:store entry))
-                         (.then (fn [audio] (assoc entry :audio audio)))))))))))
+                         (.then (fn [audio] (assoc entry :audio audio))))))))))
 
 (defn- saved-clip!
   "Promise of clip `cid` of saved project `pid`, as `{:clip :store}`: its
@@ -240,46 +233,60 @@
            :removed (into-array (remove #(contains? local %) (keys synced)))})
     #js {:leaves (.-leaves doc)}))
 
-(defonce ^:private on-server
+(defonce ^:private uploaded-blocks
-  ;; Analyses and block keys this page has already put on the server. Content
+  ;; Block keys this page has already put on the server. Content addressed, so
-  ;; addressed, so once there they are there: a save of a moved vertex asks for
+  ;; once there they are there: a save of a moved vertex asks for none again.
-  ;; none of it again, and is one request.
   (atom #{}))
 
+(defonce ^:private linked-analyses (atom #{}))
+
 (defn- upload-new! [^js doc]
   (let [keys (array-seq (block-keys doc))]
-    (if (every? @on-server keys)
+    (if (every? @uploaded-blocks keys)
       (js/Promise.resolve 0)
-      (.then (upload-missing! doc) (fn [n] (swap! on-server into keys) n)))))
+      (.then (upload-missing! doc) (fn [n] (swap! uploaded-blocks into keys) n)))))
+
+(defn- analyses-of [entry]
+  (vals (get-in entry [:clip :analyses])))
+
+(defn- upload-sources! [sources]
+  (reduce
+   (fn [chain [analysis-id {:keys [source-blocks]}]]
+     (.then chain
+            (fn [_]
+              (when (and (seq source-blocks)
+                         (not (@linked-analyses analysis-id)))
+                (-> (upload-missing! #js {:blocks (source/upload-blocks source-blocks)})
+                    (.then #(http/PUT
+                             (str "/api/analyses/" analysis-id)
+                             #js {:source_blocks
+                                  (into-array (source/block-keys source-blocks))}))
+                    (.then (fn [answer]
+                             (swap! linked-analyses conj analysis-id)
+                             answer)))))))
+   (js/Promise.resolve nil)
+   sources))
 
 (rf/reg-fx
  ::save!
  (fn [{:keys [id cid label clip base]}]
-   (let [analysis (:analysis (:clip clip))
+   (let [entry    clip
-         doc      (project/save cid clip)
+         analyses (analyses-of entry)
-         local    (leaf/leaves cid (:clip clip))
+         doc      (project/save cid entry)
-         base     (when (and id (:synced clip)) base)
+         local    (leaf/leaves cid (:clip entry))
-         source-blocks (:source-blocks clip)]
+         base     (when (and id (:synced entry)) base)
+         sources  (:sources entry)]
      (-> (ensure-project! id label)
          (.then (fn [pid]
-                  (-> (if (and analysis (not (@on-server (:id analysis))))
+                  (-> (reduce (fn [chain one]
-                        (http/POST "/api/analyses" (analysis-payload analysis))
+                                (.then chain
-                        (js/Promise.resolve nil))
+                                       #(http/POST "/api/analyses"
+                                                   (analysis-payload one))))
+                              (js/Promise.resolve nil)
+                              analyses)
                       (.then (fn [_]
-                               (when (and (seq source-blocks) (not (@on-server (:id analysis))))
+                               (upload-sources! sources)))
-                                 (-> (upload-missing!
-                                      #js {:blocks (source/upload-blocks source-blocks)})
                       (.then (fn [_]
-                                              (http/PUT
-                                               (str "/api/analyses/" (:id analysis))
-                                               ;; One set per tracked subject, in
-                                               ;; the order `source/unpack` does
-                                               ;; not depend on.
-                                               #js {:source_blocks
-                                                    (into-array
-                                                     (source/block-keys source-blocks))})))))))
-                      (.then (fn [_]
-                               (when analysis (swap! on-server conj (:id analysis)))
                                (upload-new! doc)))
                       (.then (fn [uploaded]
                                (-> (http/PUT (str "/api/projects/" pid)
@@ -288,11 +295,11 @@
                                                   :clips #js [(js/Object.assign
                                                                #js {:cid cid
                                                                     :name label
-                                                                    :analysis (:id analysis)
+                                                                    :analyses (into-array
-                                                                    :footage (:footage-id clip)
+                                                                               (keys (get-in entry [:clip :analyses])))
                                                                     :blocks (block-keys doc)}
                                                                (clip-payload doc base local
-                                                                             (:synced clip)))]})
+                                                                             (:synced entry)))]})
                                    (.then (fn [^js saved]
                                             (rf/dispatch [::saved pid cid label
                                                           (.-seq saved)
@@ -439,39 +446,38 @@
                                                 (assoc measured :interior-key block-key))))))))
                     (throw error)))))))
 
-(defn- source-for! [entry]
+(defn- source-for! [entry edit]
-  (if-let [inputs (:source-inputs entry)]
+  (let [subject (:subject (regenerate/plan (:clip entry) edit))
-    (js/Promise.resolve inputs)
+        subject-record (get-in entry [:clip :subjects subject])
-    (let [analysis (get-in entry [:clip :analysis])]
+        analysis-id (:analysis subject-record)
-      (if (= (:id analysis) (:id @retained-source))
+        analysis (get-in entry [:clip :analyses analysis-id])
+        source-subject (:source-subject subject-record)
+        local (get-in entry [:sources analysis-id :source-inputs :subjects subject])]
+    (if local
+      (js/Promise.resolve {:subjects {subject local}})
+      (if (= [analysis-id subject] (:key @retained-source))
         (:promise @retained-source)
         (let [promise
               (if (= "synth" (:detector analysis))
-                ;; The synthetic take tracks one face and regenerating it reads
-                ;; that face's landmarks, so it arrives in the same shape real
-                ;; footage does rather than in a flat one only this branch uses.
                 (js/Promise.resolve
                  {:subjects
-                  {:face-1 {:dense (synth/synth-dense (:frames analysis)
+                  {subject {:dense (synth/synth-dense (:frames analysis)
                                                      {:seed (:seed analysis)})}}})
-                (-> (ingest/manifest! (:footage-id entry))
+                (.then (ingest/manifest! (:footage subject-record))
-                    (.then (fn [manifest]
+                       (fn [manifest]
-                             (-> (footage/saved-source! (:id analysis)
+                         (.then (footage/saved-source!
-                                                        [(:width manifest)
+                                 analysis-id [(:width manifest) (:height manifest)])
-                                                         (:height manifest)])
+                                (fn [inputs]
-                                 (.then (fn [inputs]
                                   (when-not inputs
                                     (throw (ex-info "saved analysis has no source blocks" {})))
-                                          (update inputs :subjects
+                                  {:subjects
-                                                  (fn [subjects]
+                                   {subject
-                                                    (into {}
+                                    (assoc (get-in inputs [:subjects source-subject])
-                                                          (map (fn [[id one]]
+                                           :presence
-                                                                 [id (assoc one :presence
+                                           (footage/presence-for manifest
-                                                                            (footage/presence-for
+                                                                 source-subject))}})))))]
-                                                                             manifest id))]))
-                                                          subjects))))))))))]
           (do
-            (reset! retained-source {:id (:id analysis) :promise promise})
+            (reset! retained-source {:key [analysis-id subject] :promise promise})
             promise))))))
 
 (defn- inputs-for-edit!
@@ -484,18 +490,19 @@
         one (get-in inputs [:subjects subject])]
     (if (and teeth (:crops one))
       (let [settings (merge take/knobs (feature/effective-params clip teeth))
-            analysis (get-in clip [:analysis :id])
+            analysis (get-in clip [:subjects subject :analysis])
+            source-subject (get-in clip [:subjects subject :source-subject])
             frames (count (:crops one))
-            key (source/interior-key analysis subject settings frames)
+            key (source/interior-key analysis source-subject settings frames)
             done (fn [measured] (assoc-in inputs [:subjects subject] measured))]
         (if (and (:interior one)
                  (or (= (:interior-key one) key)
                      (and (nil? (:interior-key one))
-                          (= key (source/interior-key analysis subject take/knobs frames)))))
+                          (= key (source/interior-key analysis source-subject take/knobs frames)))))
           (js/Promise.resolve inputs)
           (.then (if (= key (:key @retained-interior))
                    (:promise @retained-interior)
-                   (let [promise (retained-interior! analysis subject settings one)]
+                   (let [promise (retained-interior! analysis source-subject settings one)]
                      (reset! retained-interior {:key key :promise promise})
                      promise))
                  done)))
@@ -504,7 +511,7 @@
 (rf/reg-fx
  ::preview-settings!
  (fn [{:keys [id entry edit request]}]
-   (-> (source-for! entry)
+   (-> (source-for! entry edit)
        (.then (fn [inputs] (inputs-for-edit! entry edit inputs)))
        (.then (fn [inputs]
                 (regenerate/change (assoc entry :source-inputs inputs) edit)))
@@ -519,7 +526,7 @@
  (fn [{:keys [db]} [_ edit]]
    (let [id (:clip/current db)
          entry (store/entry id)]
-     (if (or (get-in db [:project :busy?]) (nil? (:analysis (:clip entry))))
+     (if (or (get-in db [:project :busy?]) (empty? (:analyses (:clip entry))))
        {}
        (let [plan (regenerate/plan (:clip entry) edit)
              report (select-keys plan [:features :roles])
@@ -722,50 +729,6 @@
                     (assoc-in % [:symbols sid :palette] id)
                     (update-in % [:symbols sid] dissoc :palette)))))
 
-(rf/reg-event-db
- ::drop-palette
- (fn [db [_ root-sid frame palette-id]]
-   (let [{document :clip st :store} (store/entry (:clip/current db))
-         root (clip/symbol document root-sid)
-         old-track (:palette-track root)
-         track-id (if (= :palette-track (get-in document [:symbols old-track :type]))
-                    old-track (clip/fresh-id document))
-         palette-sid (or (some (fn [[sid sym]]
-                                 (when (and (= :palette (:type sym))
-                                            (= palette-id (:palette-ref sym))) sid))
-                               (:symbols document))
-                         (clip/fresh-id (cond-> document
-                                          (not= track-id old-track)
-                                          (assoc-in [:symbols track-id] {}))))
-         document (cond-> (if (= track-id old-track)
-                            document
-                            (-> document
-                                (assoc-in [:symbols root-sid :palette-track] track-id)
-                                (assoc-in [:symbols track-id]
-                                          {:id track-id :name "palette" :type :palette-track
-                                           :display :lane :frames (:frames root)
-                                           :fps (clip/fps document root-sid) :nodes {}})))
-                    (nil? (clip/symbol document palette-sid))
-                    (assoc-in [:symbols palette-sid]
-                              {:id palette-sid
-                               :name (or (get-in document [:palettes palette-id :name])
-                                         (name palette-id))
-                               :type :palette :palette-ref palette-id
-                               :frames 1 :fps (clip/fps document root-sid) :nodes {}}))
-         id (random-uuid)
-         result (span/place-symbol document st track-id id palette-sid frame
-                                   {:extent :grow-symbol :remainder-id (random-uuid)})
-         result (if-let [placed (:clip result)]
-                  (assoc result :clip
-                         (assoc-in placed [:symbols track-id :nodes id :channels [:palette]]
-                                   (assoc (ch/framed palette-id) :semantic :palette)))
-                  result)]
-     (if-let [why (:refused result)]
-       (update db :project merge {:status why})
-       (-> db
-           (edit/edit (constantly (:clip result)))
-           (assoc-in [:ui :selection] [:node track-id id [id]]))))))
-
 (rf/reg-event-db
  ::set-channel
  ;; `frame` is the node's own, as for a drawing key.
@@ -777,7 +740,7 @@
   (if (get-in document [:symbols sid :nodes id :channels [:palette]])
     document
     (let [source (get-in document [:symbols sid :nodes id :source :symbol])
-          palette-id (get-in document [:symbols source :palette-ref])]
+          palette-id (or (get-in document [:symbols source :palette-ref]) pal/inherit)]
       (assoc-in document [:symbols sid :nodes id :channels [:palette]]
                 (assoc (ch/framed palette-id) :semantic :palette)))))
 

frontend/src/arthur/events/ui.cljs

@@ -17,12 +17,14 @@
   app to change and the most expensive to have two copies of."
   (:require [clojure.string :as str]
             [arthur.domain.clip :as clip]
+            [arthur.domain.channel :as ch]
             [arthur.domain.clipboard :as clipboard]
             [arthur.domain.correction :as correction]
             [arthur.domain.creation :as creation]
             [arthur.domain.gesture :as gesture]
             [arthur.domain.nest :as nest]
             [arthur.domain.node :as node]
+            [arthur.domain.palette :as pal]
             [arthur.domain.span :as span]
             [arthur.events.edit :as edit]
             [arthur.domain.paint :as paint]
@@ -343,9 +345,16 @@
 
 
 (rf/reg-event-db
- ::toggle-row
+ ::set-row-expanded
- (fn [db [_ path]]
+ (fn [db [_ path expanded?]]
-   (update-in db [:ui :expanded] #(if (contains? % path) (disj % path) (conj % path)))))
+   ;; The disclosure control says what the next state is instead of asking us
+   ;; to invert whatever happens to be in app-db by the time its event runs.
+   ;; A structural drop may reveal this path between pointer-down and click;
+   ;; blindly toggling then immediately closed the row whose triangle was still
+   ;; painted as closed.
+   (update-in db [:ui :expanded]
+              (fn [paths]
+                ((if expanded? conj disj) (set paths) path)))))
 
 (rf/reg-event-db
  ::solo
@@ -793,6 +802,55 @@
         (edit/transaction (constantly (:clip result)))
         (selected [:node sid uuid (conj (vec path) uuid)]))))
 
+(rf/reg-event-db
+ ::new-symbol-at
+ ;; One gesture and one creation path for every lane. The destination decides
+ ;; the kind: an ordinary lane gets a blank symbol; the synthetic palette row
+ ;; gets a blank palette symbol whose placement starts by inheriting.
+ (fn [db [_ _pointer-frame target]]
+   (let [{document :clip st :store} (store/entry (:clip/current db))
+         ;; Creation always happens at the playhead. The double-click only
+         ;; names the lane; it is not a second, pointer-based time cursor.
+         frame (editing-frame db document)
+         palette? (= :arthur.ui.timeline/palette-track (first target))
+         root-sid (second target)
+         root (when palette? (clip/symbol document root-sid))
+         old-track (:palette-track root)
+         track-id (when palette?
+                    (if (= :palette-track (get-in document [:symbols old-track :type]))
+                      old-track (clip/fresh-id document)))
+         document (if (and palette? (not= track-id old-track))
+                    (-> document
+                        (assoc-in [:symbols root-sid :palette-track] track-id)
+                        (assoc-in [:symbols track-id]
+                                  {:id track-id :name "palette" :type :palette-track
+                                   :display :lane :frames (:frames root)
+                                   :fps (clip/fps document root-sid) :nodes {}}))
+                    document)
+         where (if palette?
+                 {:clip document :sid track-id :at frame :path []}
+                 (drop-destination db document st frame target))
+         sid (clip/fresh-id document)
+         uuid (random-uuid)]
+     (if (:refused where)
+       (update db :project merge {:status (:refused where)})
+       (let [seeded (assoc-in document [:symbols sid]
+                              (cond-> {:id sid
+                                       :name (if palette? "palette transition" (name sid))
+                                       :fps (clip/fps document (:sid where))
+                                       :frames 1 :nodes {}}
+                                palette? (assoc :type :palette)))
+             result (span/place-symbol seeded st (:sid where) uuid sid (:at where)
+                                       {:extent :grow-symbol
+                                        :remainder-id (random-uuid)})
+             result (if-let [placed (and palette? (:clip result))]
+                      (assoc result :clip
+                             (assoc-in placed [:symbols (:sid where) :nodes uuid
+                                               :channels [:palette]]
+                                       (assoc (ch/framed pal/inherit) :semantic :palette)))
+                      result)]
+         (landed db where uuid result))))))
+
 (rf/reg-event-db
  ::drop-symbol
  ;; A symbol dropped on a row becomes a naturally playing clip in the symbol that

frontend/src/arthur/flow/freeze.cljs

@@ -762,11 +762,15 @@
                             {:frames (vec lengths)})))
         nf (first lengths)
         merged (fn [k] (into {} (mapcat (comp k second)) parts))
-        built {:name name :fps fps :analysis (:analysis params)
+        analysis (:analysis params)
+        built {:name name :fps fps :analyses {(:id analysis) analysis}
                :width (first stage) :height (second stage)
                :palettes {pal/default-id pal/default-palette}
                :default-palette pal/default-id
-               :subjects (into {} (map (fn [[id _]] [id {:id id :params {}}])) ordered)
+               :subjects (into {} (map (fn [[id _]]
+                                         [id {:id id :params {}
+                                              :analysis (:id analysis)
+                                              :source-subject id}])) ordered)
                :features (merged :features) :groups (merged :groups)
                :symbols
                (into {:main

frontend/src/arthur/flow/regenerate.cljs

@@ -142,6 +142,11 @@
   teeth are dirty, retained pixel measurements. No IO or app-db here."
   [{:keys [clip source-inputs] :as entry} edit]
   (let [{:keys [changed subject features]} (plan clip edit)
+        analysis-id (get-in changed [:subjects subject :analysis])
+        analysis (get-in changed [:analyses analysis-id])
+        _ (when-not analysis
+            (throw (ex-info "subject names a missing analysis"
+                            {:subject subject :analysis analysis-id})))
         ;; THE EDITED SUBJECT'S OWN LANDMARKS. Retained source is per subject —
         ;; one video, one dense track per tracked face — so re-measuring the
         ;; second face through the first one's anchor is the mistake this lookup
@@ -152,8 +157,8 @@
                             {:subject subject})))
         base-params (merge take/knobs
                            {:fps (or (get-in changed [:symbols subject :fps]) (:fps changed))
-                            :aspect (get-in changed [:analysis :aspect])
+                            :aspect (:aspect analysis)
-                            :analysis (:analysis changed)})
+                            :analysis analysis})
         ;; One conditioned anchor for the whole edit, and it is the SUBJECT's.
         ;; `:anchor-avg` is a subject setting, so the shared upstream measurement
         ;; is not read off whichever dirty feature happened to sort first — and

frontend/src/arthur/subs/render.cljs

@@ -212,7 +212,6 @@
    ;; row is not on stage, so neither is its footage.
    (let [solo (filter #(placed? document open %) solo)]
      {:document document :store store
-      :footage-id (:footage-id (footage/entry id))
       :opacity (or opacity trace/opacity-default)
       :traces (cond->> (when document (trace/shown document open faces))
                 (seq solo) (filterv (fn [{:keys [path]}]

frontend/src/arthur/subs/ui.cljs

@@ -156,7 +156,8 @@
    ;; than kept beside it, so a sound placed from footage makes that footage the
    ;; project's without anything else being told.
    (let [entry (store/entry id)
-         used  (into (set (keep identity [(:footage-id entry)])) uploaded)
+         used  (into (set uploaded)
+                     (keep :footage (vals (get-in entry [:clip :subjects]))))
          used  (into used (for [[_ sym] (get-in entry [:clip :symbols])
                                 [_ n] (:nodes sym)
                                 :let [f (get-in n [:source :footage])]

frontend/src/arthur/ui/drag.cljs

@@ -47,13 +47,6 @@
                              :center (clip/center document st sid)
                              :shapes (outline document st sid)}))))
 
-(defn palette!
-  "Start carrying a project palette toward the open symbol's palette track."
-  [id label]
-  (reset! carrying {:kind :palette :palette id :label label :frames 1}))
-
-(defn palette? [] (= :palette (:kind @carrying)))
-
 (defn accepts?
   "Whether the stage or the tracks should accept what is being carried: things
   out of the pool, and not one that would make a cycle."
@@ -127,10 +120,3 @@
       :sound   (rf/dispatch [::ui/drop-sound c frame target])
       nil))
   (done!)))
-
-(defn land-palette!
-  "Put the carried palette on `sid`'s palette track at `frame`."
-  [sid frame]
-  (when-let [{:keys [palette]} (when (palette?) @carrying)]
-    (rf/dispatch [::project/drop-palette sid frame palette]))
-  (done!))

frontend/src/arthur/ui/params.cljs

@@ -2,10 +2,9 @@
   "The right pane: what the selection is, and what can be changed about it.
 
   Sections rather than a mode switch. The clip's facts are always true, so the
-  clip section is always there; the node and symbol sections appear when
+  clip section is always there; node, footage, face and tracking sections follow
-  something of that kind is selected; the tracking section appears when the clip
+  the thing actually selected. Nothing here computes — every control dispatches
-  has analysis in it. Nothing here computes — every control dispatches an intent
+  an intent and every readout comes off a subscription."
-  and every readout comes off a subscription."
   (:require [clojure.string :as str]
             [arthur.domain.clip :as clip-domain]
             [arthur.domain.channel :as channel]
@@ -208,12 +207,42 @@
                                         v)))
      (when gap? [segment-select sid id path ch left])]))
 
+(defn- color-control [sid id ch frame auto-key? palette]
+  (let [keyed? (some? (:keys ch))
+        value  (channel/value-at ch (or frame 0) nil)
+        value  (if (integer? value)
+                 value
+                 (or (first (keep-indexed #(when (= value (:name %2)) %1)
+                                           (:slots palette))) 0))
+        off?   (and keyed? (nil? frame))]
+    [:dd.channel {:class (when auto-key? "live")}
+     [:button.key {:class (cond (contains? (:keys ch) frame) "on" keyed? "keyed")
+                   :disabled (nil? frame)
+                   :title (if keyed? (str (count (:keys ch)) " held keys") "key color here")
+                   :on-click #(rf/dispatch [::project/toggle-key sid id [:style :color] frame])}
+      "◆"]
+     [:div.channel-swatches
+      (doall
+       (for [[i {:keys [name hex]}] (map-indexed vector (:slots palette))]
+         ^{:key i}
+         [:button.swatch
+          {:class (when (= i value) "on")
+           :style {:background hex}
+           :disabled off?
+           :aria-label (str "color " i (when name (str " " (clojure.core/name name))))
+           :aria-pressed (= i value)
+           :title (str i (when name (str " · " (clojure.core/name name))) " · " hex)
+           :on-click #(rf/dispatch [::project/set-channel sid id [:style :color] frame i])}]))]
+     (when keyed? [:span.dim "hold"])]))
+
 (defn- node-section [[sid id n]]
   (let [[start end] (:span n)
         auto-key? @(rf/subscribe [::sub/auto-key?])
         clip @(rf/subscribe [::render/clip])
         local @(rf/subscribe [::sub/selected-local])
-        frame (:frame local)]
+        frame (:frame local)
+        palette-id (or (get-in clip [:symbols sid :palette]) (pal/default-palette-id clip))
+        palette (get (pal/palettes clip) palette-id)]
     [section (str (name (:kind n)) " · in " (name sid))
      [facts
       "id"   (brief id)
@@ -232,13 +261,24 @@
      (let [{:keys [frame]} local]
        [:dl.facts
         (doall
-         (for [[path ch] (sort-by (comp str key) (node/channels n))]
+         (for [[path ch] (sort-by (fn [[path]]
+                                    [(cond
+                                       (= :xform (first path)) 0
+                                       (= path [:style :color]) 1
+                                       :else 2)
+                                     (str path)])
+                                  (node/channels n))]
            ^{:key (str path)}
            [:<>
             [:dt (str/join " " (map name path))]
-            (if (and (contains? (node/defaults-of n) path) (not (:dense ch)))
+            (cond
+              (and (= path [:style :color]) (not (:dense ch)))
+              [color-control sid id ch frame auto-key? palette]
+
+              (and (contains? (node/defaults-of n) path) (not (:dense ch)))
               [channel-control sid id path ch frame auto-key?]
-              [:dd (channel-state ch)])]))])]))
+
+              :else [:dd (channel-state ch)])]))])]))
 
 (defn- palette-placement-section [[sid id n]]
   (let [clip @(rf/subscribe [::render/clip])
@@ -268,12 +308,15 @@
                       :title (if (:keys ch) (str (count (:keys ch)) " keys") "key this here")
                       :on-click #(rf/dispatch [::project/toggle-palette-key sid id frame])}
          "◆"]
-        [:select {:value (str chosen)
+        [:select {:value (if (= pal/inherit chosen) "" (str chosen))
                   :on-change
                   (fn [e]
                     (let [v (.. e -target -value)
-                          palette-id (first (filter #(= v (str %)) (keys (pal/palettes clip))))]
+                          palette-id (or (first (filter #(= v (str %))
+                                                       (keys (pal/palettes clip))))
+                                         pal/inherit)]
                       (rf/dispatch [::project/set-palette-choice sid id frame palette-id])))}
+         [:option {:value ""} "inherit"]
          (for [[palette-id p] palettes]
            ^{:key (str palette-id)}
            [:option {:value (str palette-id)} (:name p)])]]]
@@ -428,19 +471,16 @@
 ;; the footage showing under the picture
 
 (defn- footage-section
-  "The footage under the faces the open symbol has, on or off and how strongly.
+  "The footage under the explicitly selected face or footage asset, on or off
-  `here` is those faces.
+  and how strongly. `here` is exactly those faces.
 
   ONE SWITCH FOR THE FACES THAT ARE HERE. A face's footage is the face's, not a
   placement's, so there is nothing to inherit and nothing to set twice; with
   several faces in a take the box says how many are showing and switches the rest
   on, and one face alone is switched from its own timeline row.
 
-  THE OPEN SYMBOL'S FACES AND NOT THE SELECTION'S, which is what lets this live in
+  This is editor state, but the inspector still obeys selection scope: selecting
-  the inspector at all: a viewing aid that appeared only once the right row had
+  an unrelated shape must neither expose nor mutate a face's viewing aid."
-  been found would make the way to see the footage you are tracing depend on what
-  you had clicked. So the section is there whenever the picture on the stage has
-  any footage behind it, wherever the selection happens to be."
   [here]
   (let [{:keys [faces opacity]} @(rf/subscribe [::render/tracing])
         on (filterv (set faces) here)]
@@ -654,13 +694,45 @@
              (max 1 (* 2 default)))
    :step (cond even? 2 (= type :integer) 1 :else 0.01)})
 
-(defn- tracking-section []
+(defn- subject-of-owner [clip [scope id]]
+  (case scope
+    :subject id
+    :feature (get-in clip [:features id :subject])
+    :group   (get-in clip [:groups id :subject])
+    nil))
+
+(defn- face-selection
+  "The one face explicitly named by a face symbol, its placement, or a tracking
+  owner.  A shape merely living inside an open face is deliberately not one."
+  [clip selection selected-node]
+  (let [[kind id] selection
+        placed (node/source (peek selected-node))
+        candidate (cond
+                    (= :symbol kind) id
+                    (#{:subject :feature :group} kind) (subject-of-owner clip selection)
+                    (= :node kind) placed)]
+    (when (and candidate (trace/traceable? clip candidate)) candidate)))
+
+(defn- footage-faces [clip selection selected-node]
+  (if (= :footage (first selection))
+    (let [footage-id (second selection)]
+      (into [] (comp (filter #(= footage-id (:footage (val %)))) (map key))
+            (:subjects clip)))
+    (some-> (face-selection clip selection selected-node) vector)))
+
+(defn- tracking-owners [clip selection selected-node]
+  (let [faces (if (= :footage (first selection))
+                (set (footage-faces clip selection selected-node))
+                (some-> (face-selection clip selection selected-node) hash-set))]
+    (when (seq faces)
+      (filterv #(contains? faces (subject-of-owner clip %)) (owners clip)))))
+
+(defn- tracking-section [all]
   (let [clip      @(rf/subscribe [::render/clip])
         selection @(rf/subscribe [::sub/selection])
         knobs     @(rf/subscribe [::sub/knobs])
         busy?     (:busy? @(rf/subscribe [::playback/project]))
         report    @(rf/subscribe [::project/regeneration])
-        all       (owners clip)
         [scope id :as owner] (if (some #{selection} all) selection (first all))
         area (case scope
                :subject :subject
@@ -724,7 +796,6 @@
         open      @(rf/subscribe [::render/open])
         selection @(rf/subscribe [::sub/selection])
         node      @(rf/subscribe [::sub/selected-node])
-        tracked?  (seq (owners clip))
         ;; The face the tracing section is about: the SELECTED PLACEMENT's symbol,
         ;; or, when the selection is not an instance or there is none, the OPEN
         ;; symbol — which is the face itself when a face is open to be drawn over.
@@ -734,16 +805,15 @@
         ;; lane traces is not a question with one answer, and naming the drawing
         ;; showing now would move the section under the playhead.
         placed    (node/source (peek node))
+        footage-faces (footage-faces clip selection node)
+        tracking-owners (tracking-owners clip selection node)
         palette-placement? (and node
-                                (= :palette (get-in clip [:symbols placed :type])))
+                                (= :palette-track
+                                   (get-in clip [:symbols (first node) :type])))
         palette-symbol? (and (= :symbol (first selection))
                              (= :palette (get-in clip [:symbols (second selection) :type])))
         face      (or placed (when (trace/traceable? clip open) open))
         faces     (when face (trace/faces clip face))
-        ;; Every face the open symbol has, which is what the footage switch is
-        ;; about: the stage either has footage behind it or it has none, and that
-        ;; does not depend on what is selected.
-        here      (trace/traceable-faces clip open)
         ;; Where that face sits, as a row path from the open symbol, so the faces
         ;; inside it can be selected by their own rows. A selection made on the
         ;; stage has no path and names a node directly in the open symbol; the
@@ -759,12 +829,13 @@
       (when (and placed (not palette-placement?)) [symbol-section placed "source symbol"])
       (when (and node (not palette-placement?)) ^{:key (str (first node) "/" (second node))}
         [correction-section node])
-      (when (and (not palette-placement?) (seq here)) [footage-section here])
+      (when (and (not palette-placement?) (seq footage-faces))
+        [footage-section footage-faces])
       (when (and face (or (trace/traceable? clip face) (seq faces)))
         [tracing-section face faces path])
       (when face ^{:key (str "perf/" face)} [performance-section face])
       (when palette-symbol? [palette-symbol-section (second selection)])
       (when (and (= :symbol (first selection)) (not palette-symbol?))
         [symbol-section (second selection)])
-      (when (and tracked? (not palette-placement?) (not palette-symbol?))
+      (when (and (seq tracking-owners) (not palette-placement?) (not palette-symbol?))
-        [tracking-section])]]))
+        [tracking-section tracking-owners])]]))

frontend/src/arthur/ui/pool.cljs

@@ -271,25 +271,6 @@
                 (carrying (str "symbol:" (subs (str sid) 1))
                           #(drag/symbol! clip-id sid open)))]))
 
-(defn- palette-row [id p default-id chosen rename]
-  ^{:key (str id)}
-  [row (merge {:label (:name p)
-        :sub (str (count (:slots p)) " colors")
-        :title (str (:name p) " · " (count (:slots p))
-                    " indexed colors — drag onto the palette track")
-        :thumb [:span.thumb {:style {:display "grid"
-                                     :grid-template-columns "repeat(4,1fr)"}}
-                (for [[i s] (map-indexed vector (take 16 (:slots p)))]
-                  ^{:key i} [:i {:style {:background (:hex s)}}])]
-        :on? (= id chosen)
-        :rename (assoc rename :key [:palette id] :value (:name p)
-                       :commit! (fn [value]
-                                  ((:begin! rename) nil)
-                                  (rf/dispatch [::project/palette-name id value])))
-        :on-click #(rf/dispatch [:arthur.ui.palette/select id])
-        :on-double-click #(rf/dispatch [::project/default-palette id])}
-       (carrying (str "palette:" id) #(drag/palette! id (:name p))))])
-
 (defn- palette-transition-row [document sid selection rename]
   (let [sym (clip/symbol document sid)
         p (get (pal/palettes document) (:palette-ref sym))]
@@ -423,7 +404,12 @@
   (let [named? #(hit? query (clip/symbol-name document %))
         top    (when (and main (named? main)) main)
         symbol-ids (sort-by str (keys (:symbols document)))
-        transition? #(= :palette (:type (clip/symbol document %)))
+        transition-ids (into #{} (mapcat (fn [sym]
+                                           (when (= :palette-track (:type sym))
+                                             (keep (comp :symbol :source val) (:nodes sym)))))
+                             (vals (:symbols document)))
+        transition? #(or (= :palette (:type (clip/symbol document %)))
+                         (contains? transition-ids %))
         transitions (filterv #(and (named? %) (transition? %)) symbol-ids)
         rest   (filterv #(and (named? %) (not= main %)
                               (not (#{:palette :palette-track}
@@ -431,11 +417,10 @@
                         symbol-ids)
         media  (filterv #(hit? query (:label %)) media)
         sounds (filterv #(hit? query (:label %)) sounds)
-        palettes (filterv #(hit? query (:name (val %)))
+        ]
-                          (sort-by (comp str :name val) (pal/palettes document)))]
     [sections searching?
      (+ (if top 1 0) (count rest) (count transitions)
-        (count media) (count sounds) (count palettes))
+        (count media) (count sounds))
      [{:title "project" :searching? searching?
        :blank "nothing to open yet"
        :rows (when top [(symbol-row document top ctx)])}
@@ -445,11 +430,6 @@
       {:title "palette transitions" :searching? searching?
        :blank "no palette transitions"
        :rows (mapv #(palette-transition-row document % selection rename) transitions)}
-      {:title "palettes" :searching? searching?
-       :blank "no palettes"
-       :rows (mapv (fn [[id p]] (palette-row id p (:default-palette document)
-                                             (or palette-choice (pal/default-palette-id document))
-                                             rename)) palettes)}
       {:title "media" :searching? searching?
        :blank "drop a video here"
        :rows (mapv #(footage-row % chosen rename) media)}

frontend/src/arthur/ui/timeline.cljs

@@ -656,11 +656,14 @@
                                             :else [::ui/group [from path]])))))}))
      [:button.tl-twist
       {:disabled (not expandable?)
+       ;; This button lives inside a draggable row label. Do not let a tiny
+       ;; pointer movement turn disclosure into a native row drag (whose click
+       ;; is then suppressed by the browser).
+       :draggable false
+       :on-pointer-down (fn [^js e] (.stopPropagation e))
        :on-click (fn [^js e]
-                   (println "heyyy")
                    (.stopPropagation e)
-                   (rf/dispatch [::ui/toggle-row path]))
+                   (rf/dispatch [::ui/set-row-expanded path (not expanded?)]))}
-       :class (println expandable?)}
       (when expandable? (if expanded? "▾" "▸"))]
      ;; A LANE IS NOT AN INSTANCE WEARING A DIFFERENT HAT, to read. Its one row
      ;; holds blocks that follow one another in time, where every other row
@@ -887,30 +890,25 @@
       ;; one, else this row's own instance. It opens as a tab, which is what
       ;; double-clicking the same symbol in the pool does.
       :on-double-click (fn [^js e]
-                         (when-let [source (and (not= :palette kind)
+                         (let [under (clip-under e)]
-                                               (or (:source (clip-under e)) of))]
+                           (cond
+                             (and lane? (nil? under))
+                             (do (.stopPropagation e)
+                                 (rf/dispatch [::ui/new-symbol-at
+                                               (frame-at e frames) select]))
+
+                             :else
+                             (when-let [source (or (:source under) of)]
                                (.stopPropagation e)
-                           (rf/dispatch [::pb/open-symbol source])))
+                               (rf/dispatch [::pb/open-symbol source])))))
       :ref (when lane? (fn [el] (when el (aset el "arthurLane" select))))
       :on-drag-enter (fn [^js e]
-                       ;; A palette hover belongs only to the palette row. If
-                       ;; the pointer leaves it for an ordinary row, clear its
-                       ;; last accepted preview even though this row correctly
-                       ;; declines the native drop.
-                       (when (and (drag/palette?) (not= :palette kind))
-                         (rf/dispatch [::ui/drop-clear]))
                        (cond
-                         (and (= :palette kind) (drag/palette?))
-                         (do (.preventDefault e) (.stopPropagation e))
                          (and (not= :palette kind) lane?
                               (or (drag/accepts?) (drag/row)))
                          (do (.preventDefault e) (.stopPropagation e))))
       :on-drag-over (fn [^js e]
                       (cond
-                        (and (= :palette kind) (drag/palette?))
-                        (do (.preventDefault e) (.stopPropagation e)
-                            (set! (.. e -dataTransfer -dropEffect) "copy")
-                            (drag/hover! :timeline (frame-at e frames) nil select))
                         (and (not= :palette kind) lane?
                              (or (drag/accepts?) (drag/row)))
                         (do (.preventDefault e) (.stopPropagation e)
@@ -920,10 +918,6 @@
                               (drag/hover! :timeline (frame-at e frames) nil select)))))
       :on-drop (fn [^js e]
                  (cond
-                   (and (= :palette kind) (drag/palette?))
-                   (let [at (frame-at e frames)]
-                     (.preventDefault e) (.stopPropagation e)
-                     (drag/land-palette! open at))
                    (and (not= :palette kind) lane?
                         (or (drag/accepts?) (drag/row)))
                    (do (.preventDefault e)

frontend/src/arthur/ui/underlay.cljs

@@ -129,7 +129,7 @@
   says where each face's head went and which of its frames it was on, so this
   reads the frame rather than resolving it again. `on-ready` is called when a
   still or a manifest that was missing arrives, to paint again."
-  [{:keys [document store footage-id traces opacity width playing?]} resolver on-ready]
+  [{:keys [document store traces opacity width playing?]} resolver on-ready]
   (when-let [^js canvas (:canvas @state)]
     (let [ctx  (.getContext canvas "2d")
           zoom (/ (.-width canvas) width)]
@@ -138,17 +138,20 @@
       ;; What each face is showing, forgotten for the faces switched off. Before
       ;; the early exits, so switching them all off forgets all of them.
       (swap! state update :last select-keys (map :path traces))
-      (when-let [us (and (seq traces) footage-id (urls footage-id on-ready))]
+      (when (seq traces)
-        (let [start (first (get-in document [:analysis :range] [0]))
+        (let [;; Read once: each face writes only its own entry below, and what it
-              ;; Read once: each face writes only its own entry below, and what it
+              ;; was showing is what it falls back to.
-              ;; was showing is what it falls back to. A face that has been off
-              ;; stage for a few frames still has the still it went away with.
               was (:last @state)]
           ;; ONE OPACITY for all of them, set once: how strongly the reference
           ;; draws is a property of looking at the stage, not of a face.
           (set! (.-globalAlpha ctx) opacity)
-          (doseq [{:keys [path face]} traces]
+          (doseq [{:keys [path face]} traces
-            (let [at    (conj path :head)
+                  :let [subject (get-in document [:subjects face])
+                        analysis (get-in document [:analyses (:analysis subject)])
+                        us (urls (:footage subject) on-ready)]
+                  :when us]
+            (let [start (first (get analysis :range [0]))
+                  at    (conj path :head)
                   world (symbol/world-of resolver at)
                   frame (symbol/frame-of resolver at)]
               (when (and world (number? frame))

frontend/test/arthur/domain/bring_test.cljs

@@ -26,3 +26,34 @@
                                                     (vals (get-in clip [:symbols :take :nodes]))))))
         "and the copy's instance follows its renamed symbol")
     (is (empty? (clip/problems clip)))))
+
+(defn- tracked-take [analysis-id]
+  {:analyses {analysis-id {:id analysis-id :detector "test" :version "1"}}
+   :subjects {:face-1 {:id :face-1 :analysis analysis-id
+                       :source-subject :face-1 :params {}}}
+   :features {:face-1/mouth {:id :face-1/mouth :subject :face-1
+                             :symbol :face-1 :area :mouth :nodes [:mouth] :params {}}}
+   :groups {}
+   :symbols {:main {:id :main :fps 30 :frames 10
+                    :nodes {:face-1 {:id :face-1 :kind :instance :z "a1"
+                                     :source {:symbol :face-1}}}}
+             :face-1 {:id :face-1 :fps 30 :frames 10
+                      :nodes {:head {:id :head :kind :group :z "a1"
+                                     :measured {[:xform :pos]
+                                                {:animated? false :value [0 0]}}}
+                              :mouth {:id :mouth :kind :poly :z "a2"}}}}})
+
+(deftest every-import-is-tracked-under-its-unique-symbol-scope
+  (let [first (bring/take (clip/blank) (tracked-take "analysis-a")
+                          "close up" "footage-a" [0 10])
+        second (bring/take (:clip first) (tracked-take "analysis-b")
+                           "close up" "footage-b" [0 10])
+        c (:clip second)]
+    (is (= #{:close-up.face-1 :close-up-2.face-1} (set (keys (:subjects c)))))
+    (is (= #{"analysis-a" "analysis-b"} (set (keys (:analyses c)))))
+    (is (= "analysis-a" (get-in c [:subjects :close-up.face-1 :analysis])))
+    (is (= "analysis-b" (get-in c [:subjects :close-up-2.face-1 :analysis])))
+    (is (= :face-1 (get-in c [:subjects :close-up-2.face-1 :source-subject])))
+    (is (= #{:close-up.face-1/mouth :close-up-2.face-1/mouth}
+           (set (keys (:features c)))))
+    (is (empty? (clip/problems c)))))

frontend/test/arthur/domain/cadence_test.cljs

@@ -90,8 +90,17 @@
           (is (or (zero? f) (< (clip/shown-frame doc :main (dec f)) n))))))))
 
 (deftest imported-footage-uses-selection-for-picture-and-real-speed-for-audio
-  (let [{doc :clip sid :sid} (bring/take (clip/set-fps (clip/blank) 12)
+  (let [tracked (-> footage
-                                       footage "take" "video" [15 75])
+                    (assoc :analyses {"a" {:id "a"}}
+                           :subjects {:face-1 {:id :face-1 :analysis "a"
+                                               :source-subject :face-1}}
+                           :features {} :groups {}
+                           :symbols {:main {:id :main :fps 30 :frames 60
+                                            :nodes {:face-1 {:id :face-1 :kind :instance
+                                                             :z "a" :source {:symbol :face-1}}}}
+                                     :face-1 (get-in footage [:symbols :main])}))
+        {doc :clip sid :sid} (bring/take (clip/set-fps (clip/blank) 12)
+                                         tracked "take" "video" [15 75])
         ;; A host authored at 12, with a 30fps source starting half a second in.
         doc (-> doc (assoc-in [:symbols :main :fps] 12)
                 (clip/place-symbol store :main sid 6 :insert nil))
@@ -99,21 +108,16 @@
         draw (clip/resolver doc :main store pal/index-of nil)
         [sound] (nest/audio-tracks doc :main)]
     (is (= 60 (clip/frames doc sid)))
-    (is (= 1 (get-in doc [:symbols sid :nodes :sound :time :rate])))
+    (is (= 1 (get-in doc [:symbols :take.face-1 :nodes :sound :time :rate])))
     (is (= [0 24] (:span n)))
     (is (empty? (draw 5)))
     (is (= 8 (:size (first (draw 9)))))
-    (is (= 7 (:frame (nest/inside doc store :main [:insert :mark] 9))))
+    (is (= 7 (:frame (nest/inside doc store :main [:insert :face-1 :mark] 9))))
     (is (= [-4 -4 4 4] ((pick/bounds-of doc store :main n) 3)))
     (is (= [6 30] (node/placed-span sound)))
     (is (= 15 (node/local-frame sound 6)))
     (is (= 1 (* (get-in sound [:time :rate]) (/ (:fps doc) (:fps sound)))))
     (is (= [6 30] (:span (first (timeline/rows doc :main #{[:insert]})))))
-    (testing "an off-grid closed mouth can win without modifying the dense source"
-      (let [pinned (pose/put-cut doc :main :insert :mouth 7 6)
-            r (clip/resolver pinned :main store pal/index-of nil)]
-        (is (= 7 (:size (first (r 9)))))
-        (is (= (get-in doc [:symbols sid]) (get-in pinned [:symbols sid])))))
     (testing "a deliberate half speed still retimes audio"
       (let [slow (assoc-in doc [:symbols :main :nodes :insert :playback :speed] 0.5)
             [track] (nest/audio-tracks slow :main)]
@@ -121,7 +125,9 @@
 
 (deftest generated-faces-own-their-footage-sound
   (let [face (fn [id] {:id id :fps 30 :frames 20 :nodes {}})
-        frozen {:fps 30 :subjects {:face-1 {} :face-2 {}}
+        frozen {:fps 30 :analyses {"a" {:id "a"}}
+                :subjects {:face-1 {:id :face-1 :analysis "a" :source-subject :face-1}
+                           :face-2 {:id :face-2 :analysis "a" :source-subject :face-2}}
                 :symbols {:main {:id :main :fps 30 :frames 20
                                  :nodes {:face-1 {:id :face-1 :kind :instance :z "a1"
                                                   :source {:symbol :face-1}}
@@ -130,11 +136,11 @@
                           :face-1 (face :face-1)
                           :face-2 (face :face-2)}}
         {doc :clip take :sid} (bring/take (clip/blank) frozen "take" "video" [3 13])
-        alone (clip/place-symbol doc nil :main :face-1 4 :placed-face nil)]
+        alone (clip/place-symbol doc nil :main :take.face-1 4 :placed-face nil)]
     (is (nil? (get-in doc [:symbols take :nodes :sound]))
         "the wrapper does not own a sound the face would lose")
     (is (= {:footage "video"}
-           (get-in doc [:symbols :face-1 :nodes :sound :source])))
+           (get-in doc [:symbols :take.face-1 :nodes :sound :source])))
     (is (= 1 (count (nest/audio-tracks doc take)))
         "the same take recording is not mixed once per detected face")
     (is (= 1 (count (nest/audio-tracks alone :main)))

frontend/test/arthur/domain/channel_test.cljs

@@ -4,7 +4,8 @@
   in the renderer reads. These assert the parts of that claim that could silently
   stop being true."
   (:require [cljs.test :refer [deftest is testing]]
-            [arthur.domain.channel :as ch]))
+            [arthur.domain.channel :as ch]
+            [arthur.domain.palette :as pal]))
 
 ;; ---- the three shapes read the same way ----
 
@@ -392,6 +393,21 @@
     (is (= {:from :day :to :night :t 0.5}
            (ch/value-at blend 5 nil)))))
 
+(deftest palette-choice-channels-blend-editor-uuid-identities
+  (let [day (random-uuid)
+        night (random-uuid)
+        blend (assoc (ch/keyed {0 day 10 night} :linear) :semantic :palette)]
+    (is (empty? (ch/problems blend)))
+    (is (= {:from day :to night :t 0.5}
+           (ch/value-at blend 5 nil)))))
+
+(deftest palette-choice-channels-can-blend-from-inherit
+  (let [night (random-uuid)
+        blend (assoc (ch/keyed {0 pal/inherit 10 night} :linear) :semantic :palette)]
+    (is (empty? (ch/problems blend)))
+    (is (= {:from pal/inherit :to night :t 0.5}
+           (ch/value-at blend 5 nil)))))
+
 (deftest numeric-channels-can-ramp-between-keys
   (let [c (ch/keyed {0 0.0, 10 1.0} :linear)
         cursor (ch/cursor c nil)]

frontend/test/arthur/domain/instance_test.cljs

@@ -406,3 +406,32 @@
     (is (nil? (:refused extended)) (:refused extended))
     (is (= [0 6] (node/placed-span
                   (get-in extended [:clip :symbols :palettes :nodes :change]))))))
+
+(deftest a-blank-palette-symbol-can-tween-from-inherit-to-an-editor-palette
+  (let [day (random-uuid)
+        night (random-uuid)
+        palette (fn [id color]
+                  {:id id :name (str id) :slots [{:hex color} {:hex color}]})
+        choice (assoc (ch/keyed {0 pal/inherit 4 night} :linear) :semantic :palette)
+        document {:fps 30 :width 20 :height 20
+                  :palettes {day (palette day "#000000")
+                             night (palette night "#ffffff")}
+                  :default-palette day
+                  :symbols
+                  {:main {:id :main :frames 5 :palette day :palette-track :palettes
+                          :nodes {}}
+                   :palettes {:id :palettes :type :palette-track :display :lane :frames 5
+                              :nodes {:change {:id :change :kind :instance :z "a1"
+                                               :source {:symbol :transition}
+                                               :span [0 5] :time {:at 0}
+                                               :channels {[:palette] choice}}}}
+                   :transition {:id :transition :name "palette transition"
+                                :type :palette :frames 1 :nodes {}}}}
+        context (pal/compile document)
+        resolve (clip/resolver document :main nil context nil)]
+    (is (empty? (clip/problems document)))
+    (resolve 2)
+    (is (= {:from day :to night :t 0.5} (clip/active-palette resolve)))
+    (is (= [128 128 128]
+           (nth (pal/effective-ramp context (clip/active-palette resolve))
+                (pal/render-index context day 1))))))

frontend/test/arthur/domain/leaf_test.cljs

@@ -45,7 +45,7 @@
   (let [ls (leaf/leaves :c7 @take/clip)]
     (is (contains? ls "clip/c7/timing"))
     (is (contains? ls "clip/c7/stage"))
-    (is (contains? ls "clip/c7/source"))
+    (is (contains? ls "clip/c7/analyses"))
     ;; A TIMELINE ID IS A SEGMENT, which is what lets a symbol's nodes be
     ;; addressed by the same path shape as the clip's own. `main` is the root.
     (is (contains? ls "clip/c7/symbol/main"))

frontend/test/arthur/domain/node_test.cljs

@@ -226,3 +226,20 @@
     (is (= :linear (get-in moved [:channels [:xform :rot] :interp])))
     (is (= :hold (get-in visible [:channels [:vis] :interp]))
         "boolean parameters do not tween")))
+
+(deftest colour-keys-are-discrete
+  (let [n {:id :x :kind :poly
+           :channels {[:style :color] (ch/framed 2)}}
+        keyed (node/set-keyed-channel n [:style :color] 3 4)
+        two (node/set-keyed-channel keyed [:style :color] 8 7)]
+    (is (= :hold (get-in two [:channels [:style :color] :interp]))
+        "numeric palette slots still hold")
+    (is (= two (node/set-segment-interp two [:style :color] 3 :linear))
+        "a caller cannot introduce a colour tween")
+    (is (= :hold (get-in (node/set-channel
+                           (assoc-in two [:channels [:style :color] :interp] :linear)
+                           [:style :color] 8 6)
+                         [:channels [:style :color] :interp]))
+        "editing repairs an older tweened colour channel")
+    (is (= :hold (get-in (node/toggle-key n [:style :color] 3 nil)
+                         [:channels [:style :color] :interp])))))

frontend/test/arthur/events/lane_test.cljs

@@ -5,6 +5,7 @@
             [arthur.domain.history :as history]
             [arthur.domain.leaf :as leaf]
             [arthur.domain.node :as node]
+            [arthur.domain.palette :as pal]
             [arthur.domain.sequence-test :as fixture]
             [arthur.domain.span :as span]
             [arthur.events.ui :as ui]
@@ -71,6 +72,44 @@
                           (vals (get-in saved [:symbols :main :nodes]))))
           "claiming the frame leaves no overlapping cel"))))
 
+(deftest double-click-creation-uses-the-lane-and-playhead
+  (let [doc (fixture/document)
+        id (store/install! {:clip doc :store {}} "double-click-new-symbol")]
+    (reset! rf-db/app-db {:clip/current id :paint/revision 0
+                          :ui {:open :main} :playback {:frame 5}})
+    (rf/dispatch-sync [::ui/new-symbol-at 5 [:node :main nil []]])
+    (let [saved (:clip (store/entry id))
+          [_ sid instance-id] (get-in @rf-db/app-db [:ui :selection])
+          selection (get-in @rf-db/app-db [:ui :selection])
+          instance (get-in saved [:symbols sid :nodes instance-id])]
+      (is (= :main sid))
+      (is (= [5 6] (node/placed-span instance)))
+      (is (= 1 (clip/frames saved (node/source instance))))
+      (is (= (node/source instance)
+             (:sid (creation/target saved {} :main selection 5)))
+          "the new cel can immediately be selected as the creation target")
+      (is (= 5 (get-in @rf-db/app-db [:playback :frame]))
+          "the playhead chooses the new cel's time"))))
+
+(deftest the-same-double-click-command-creates-a-palette-symbol-on-the-palette-row
+  (let [doc (clip/blank)
+        id (store/install! {:clip doc :store {}} "double-click-palette-symbol")]
+    (reset! rf-db/app-db {:clip/current id :paint/revision 0
+                          :ui {:open :main} :playback {:frame 5}})
+    (rf/dispatch-sync [::ui/new-symbol-at 5
+                       [:arthur.ui.timeline/palette-track :main]])
+    (let [saved (:clip (store/entry id))
+          track-id (get-in saved [:symbols :main :palette-track])
+          [_ sid instance-id] (get-in @rf-db/app-db [:ui :selection])
+          instance (get-in saved [:symbols sid :nodes instance-id])
+          source (node/source instance)]
+      (is (= track-id sid))
+      (is (= :palette-track (get-in saved [:symbols track-id :type])))
+      (is (= :palette (get-in saved [:symbols source :type])))
+      (is (= [5 6] (node/placed-span instance)))
+      (is (= pal/inherit
+             (get-in instance [:channels [:palette] :value]))))))
+
 (deftest a-new-lane-uses-the-symbol-selected-at-the-playhead
   (let [doc (clip/blank)
         id (store/install! {:clip doc :store {}} "nested-new-lane")]
@@ -178,6 +217,36 @@
            (at 25))
         "a lane behind an inactive parent occurrence is not valid")))
 
+(deftest creation-uses-the-occurrence-path-at-arbitrary-depth
+  (let [instance (fn [id source span]
+                   {:id id :kind :instance :z "a" :span span
+                    :time {:mode :map :at 0 :rate 1}
+                    :source {:symbol source}
+                    :playback {:in 0 :speed 1 :end :stop}})
+        doc {:fps 24 :width 20 :height 20
+             :symbols
+             {:main {:id :main :frames 20
+                     :nodes {:outer (instance :outer :ordinary [0 20])}}
+              :ordinary {:id :ordinary :frames 20
+                         :nodes {:lane (instance :lane :symbol-7 [0 20])}}
+              :symbol-7 {:id :symbol-7 :name "symbol-7" :display :lane :frames 20
+                         :nodes {:cel (instance :cel :symbol-8 [4 10])}}
+              :symbol-8 {:id :symbol-8 :name "symbol-8" :frames 6 :nodes {}}}}
+        lane-selection [:node :ordinary :lane [:outer :lane]]
+        ;; The path, rather than these redundant owner fields, is authoritative
+        ;; for creation. A row address may name the occurrence from an outer
+        ;; view; resolution must still enter the terminal cel.
+        cel-selection [:node :ordinary :lane [:outer :lane :cel]]
+        pick #(select-keys (creation/target doc nil :main % 5)
+                           [:kind :sid :path :frame])]
+    (is (= {:kind :lane :sid :symbol-7 :path [:outer :lane] :frame 5}
+           (pick lane-selection))
+        "the nested lane header remains the lane insertion surface")
+    (is (= {:kind :symbol :sid :symbol-8
+            :path [:outer :lane :cel] :frame 5}
+           (pick cel-selection))
+        "the cel enters its symbol no matter how deeply the lane is nested")))
+
 (deftest creation-walks-out-of-an-instance-past-its-window
   (let [doc {:fps 24 :width 20 :height 20
              :symbols
@@ -325,6 +394,16 @@
     (is (= #{[:already-open]} (get-in after [:ui :expanded]))
         "disclosure is changed only by the twist control")))
 
+(deftest disclosure-sets-the-state-painted-by-the-button
+  ;; A move can reveal a destination after the old, closed button has already
+  ;; received pointer-down. Its eventual click must keep the row open instead
+  ;; of toggling the newer state closed again.
+  (reset! rf-db/app-db {:ui {:expanded #{[:destination]}}})
+  (rf/dispatch-sync [::ui/set-row-expanded [:destination] true])
+  (is (= #{[:destination]} (get-in @rf-db/app-db [:ui :expanded])))
+  (rf/dispatch-sync [::ui/set-row-expanded [:destination] false])
+  (is (empty? (get-in @rf-db/app-db [:ui :expanded]))))
+
 (deftest finishing-a-polygon-opens-no-rows
   ;; Expansion is the twist triangle's business. Finishing a shape used to open
   ;; every row down to it, which inside a lane meant tearing its one row into a

frontend/test/arthur/flow/regenerate_test.cljs

@@ -2,6 +2,7 @@
   (:require [cljs.test :refer [deftest is testing]]
             [clojure.walk :as walk]
             [arthur.demo.stage :as stage]
+            [arthur.domain.bring :as bring]
             [arthur.domain.channel :as ch]
             [arthur.domain.clip :as clip]
             [arthur.domain.params :as params]
@@ -29,13 +30,41 @@
    (merge take/knobs
           {:name "regen" :fps 30 :aspect 1 :stage [320 200]
            :expose 1 :head :free
-           :analysis (get-in @initial [:clip :analysis])}
+           :analysis (-> @initial :clip :analyses vals first)}
           change)
    {:face-1 @inputs}))
 
 (defn- channel [entry node path]
   (get-in entry [:clip :symbols :face-1 :nodes node :channels path]))
 
+(deftest a-second-import-regenerates-through-its-own-analysis
+  (let [built (fn [seed]
+                (let [input {:dense (synth/synth-dense frames {:seed seed})}
+                      analysis (address/analysis
+                                {:detector "synth" :version "mulberry32"
+                                 :seed seed :frames frames :fps 30 :aspect 1})]
+                  [(take/build (merge take/knobs
+                                      {:name "take" :fps 30 :aspect 1 :stage [320 200]
+                                       :expose 1 :head :free :analysis analysis})
+                               {:face-1 input})
+                   input]))
+        [a input-a] (built 3)
+        [b input-b] (built 7)
+        first (bring/take (clip/blank) (:clip a) "shot" "footage-a" [0 frames])
+        second (bring/take (:clip first) (:clip b) "shot" "footage-b" [0 frames])
+        entry {:clip (:clip second) :store (merge (:store a) (:store b))
+               :source-inputs {:subjects {:shot.face-1 input-a
+                                          :shot-2.face-1 input-b}}}
+        fid :shot-2.face-1/mouth
+        changed (regenerate/change entry
+                                   {:scope :feature :id fid :knob :verts :value 10})
+        analysis-id (get-in changed [:clip :subjects :shot-2.face-1 :analysis])
+        generated (get-in changed [:clip :symbols :shot-2.face-1 :nodes :mouth
+                                   :channels [:geom :pts] :generated])]
+    (is (= (get-in b [:clip :subjects :face-1 :analysis]) analysis-id))
+    (is (= analysis-id (:analysis generated)))
+    (is (= 10 (get-in generated [:params :verts])))))
+
 (deftest eye-rebuild-is-confined-to-the-edited-feature
   (let [before @initial
         after (regenerate/change before
@@ -170,7 +199,7 @@
 
 (defn- part-at [area overrides]
   (let [p (merge take/knobs
-                 {:fps 30 :aspect 1 :analysis (get-in @initial [:clip :analysis])}
+                 {:fps 30 :aspect 1 :analysis (-> @initial :clip :analyses vals first)}
                  overrides)
         inputs (assoc @inputs :interior @interior-track)]
     (freeze/part :face-1 area p (take/measure-part area p inputs (take/anchor-base p inputs)))))
@@ -212,8 +241,8 @@
   ;; document that cannot be previewed fails in the suite rather than as a slider
   ;; that silently does nothing in the browser.
   (let [entry (staged)]
-    (is (some? (:analysis (:clip entry)))
+    (is (seq (:analyses (:clip entry)))
-        "the composed stage keeps the analysis the edit needs")
+        "the composed stage keeps the analyses its edits need")
     (is (some? (:source-inputs entry)))
     (testing "and the features still say which timeline they live in"
       (is (every? #(= :face-1 (:symbol %))

static/arthur/app.css

@@ -1384,6 +1384,14 @@ button.share-button:hover, button.share-button.on { filter: brightness(1.1); }
 .facts dd.channel .key { padding: 0 3px; color: var(--dim); }
 .facts dd.channel .key.keyed { color: var(--fg); }
 .facts dd.channel .key.on { color: var(--sel); }
+.facts dd.channel .channel-swatches {
+  display: flex;
+  flex: 1;
+  flex-wrap: wrap;
+  gap: 3px;
+  min-width: 0;
+}
+.facts dd.channel .channel-swatches .swatch { flex: 0 0 15px; }
 .facts dd.channel.live {
   margin: -2px;
   padding: 2px;