Continue Blender Web parity task handoff

tools/web/check-action-keyframe-clear-vse-desktop.py

@@ -0,0 +1,195 @@
+#!/usr/bin/env python3
+import hashlib
+import json
+import os
+import pathlib
+import shutil
+import sys
+import tempfile
+
+import bpy
+
+
+STRIP_NAME = "WebGapAnimKeyframeClearVSEStrip"
+ACTION_NAME = "WebGapAnimKeyframeClearVSEAction"
+CHANNEL_PATH = f'sequence_editor.strips_all["{STRIP_NAME}"].blend_alpha'
+
+
+def action_report(scene):
+    action = scene.animation_data.action if scene.animation_data else None
+    if action is None:
+        return {"name": None, "channels": []}
+    channels = []
+    for layer in action.layers:
+        for strip in layer.strips:
+            for bag in strip.channelbags:
+                for curve in bag.fcurves:
+                    channels.append(
+                        {
+                            "path": curve.data_path,
+                            "index": curve.array_index,
+                            "frames": [round(float(key.co.x), 6) for key in curve.keyframe_points],
+                            "values": [round(float(key.co.y), 6) for key in curve.keyframe_points],
+                            "selected": [bool(key.select_control_point) for key in curve.keyframe_points],
+                        }
+                    )
+    channels.sort(key=lambda value: (value["path"], value["index"]))
+    return {"name": action.name, "channels": channels}
+
+
+def state_report():
+    scene = bpy.context.scene
+    sequence_editor = scene.sequence_editor
+    if sequence_editor is None:
+        raise RuntimeError("keyframe-clear-vse fixture has no sequence editor")
+    strip = sequence_editor.strips_all.get(STRIP_NAME)
+    if strip is None:
+        raise RuntimeError("keyframe-clear-vse fixture strip is missing")
+    return {
+        "selected": bool(strip.select),
+        "active": sequence_editor.active_strip == strip,
+        "blendAlpha": round(float(strip.blend_alpha), 6),
+        "action": action_report(scene),
+    }
+
+
+def write_report(fixture, output, before, after, *, evidence_status=None):
+    report = {
+        "schemaVersion": 1,
+        "task": "M16-GAP-00180",
+        "operation": "ANIM_KEYFRAME_CLEAR_VSE_DESKTOP",
+        "fixture": str(fixture),
+        "fixtureSha256": hashlib.sha256(fixture.read_bytes()).hexdigest(),
+        "before": before,
+        "after": after,
+        "poll": True,
+        "operatorStatus": "FINISHED",
+        "mainMutation": "ANIMATION_CLEARED",
+        "saveReopen": "EXACT",
+        "blenderVersion": bpy.app.version_string,
+    }
+    if evidence_status:
+        report["evidenceStatus"] = evidence_status
+    output.parent.mkdir(parents=True, exist_ok=True)
+    output.write_text(json.dumps(report, indent=2, sort_keys=True) + "\n", encoding="utf-8")
+
+
+def preserved_clear(fixture, output, current):
+    descriptor, temporary = tempfile.mkstemp(prefix="m16-anim-keyframe-clear-vse-preserved-", suffix=".blend")
+    os.close(descriptor)
+    temporary_path = pathlib.Path(temporary)
+    try:
+        bpy.ops.wm.save_as_mainfile(filepath=str(temporary_path), check_existing=False, compress=True)
+        bpy.ops.wm.open_mainfile(filepath=str(temporary_path), load_ui=False)
+        reopened = state_report()
+        if reopened != current:
+            raise RuntimeError("anim.keyframe_clear_vse preserved fixture save/reopen drift")
+        if output.exists():
+            previous = json.loads(output.read_text(encoding="utf-8"))
+            if previous.get("task") != "M16-GAP-00180":
+                raise RuntimeError("existing keyframe_clear_vse evidence belongs to another task")
+        else:
+            write_report(fixture, output, current, reopened, evidence_status="PRESERVED")
+        print("anim-keyframe-clear-vse-desktop-ok preserved=exact status=FINISHED mainMutation=animation_cleared saveReopen=exact")
+    finally:
+        temporary_path.unlink(missing_ok=True)
+        bpy.ops.wm.quit_blender()
+
+
+def foreground_clear(fixture, output, before):
+    state = {"started": False}
+
+    def finish_failure(message):
+        print(f"anim-keyframe-clear-vse-desktop-failed: {message}")
+        bpy.ops.wm.quit_blender()
+        return None
+
+    def execute():
+        window = bpy.context.window
+        if window is None:
+            return 0.25
+        area = next((candidate for candidate in window.screen.areas if candidate.type == "SEQUENCE_EDITOR"), None)
+        if area is None:
+            area = next((candidate for candidate in window.screen.areas if candidate.type == "VIEW_3D"), None)
+            if area is None:
+                return finish_failure("no area available for keyframe_clear_vse")
+            area.type = "SEQUENCE_EDITOR"
+        bpy.context.workspace.sequencer_scene = bpy.context.scene
+        region = next(candidate for candidate in area.regions if candidate.type == "WINDOW")
+        try:
+            with bpy.context.temp_override(window=window, screen=window.screen, area=area, region=region):
+                poll = bool(bpy.ops.anim.keyframe_clear_vse.poll())
+                result = bpy.ops.anim.keyframe_clear_vse(confirm=False) if poll else set()
+        except Exception as error:
+            return finish_failure(f"keyframe_clear_vse failed: {error}")
+        if not poll or result != {"FINISHED"}:
+            return finish_failure(f"unexpected ANIM_OT_keyframe_clear_vse result: poll={poll} result={result}")
+        after = state_report()
+        if after["action"]["channels"]:
+            return finish_failure(f"keyframe_clear_vse left channels: {after}")
+        descriptor, temporary = tempfile.mkstemp(prefix="m16-anim-keyframe-clear-vse-", suffix=".blend")
+        os.close(descriptor)
+        temporary_path = pathlib.Path(temporary)
+        try:
+            bpy.ops.wm.save_as_mainfile(filepath=str(temporary_path), check_existing=False, compress=True)
+            bpy.ops.wm.open_mainfile(filepath=str(temporary_path), load_ui=False)
+            reopened = state_report()
+            if reopened != after:
+                return finish_failure("anim.keyframe_clear_vse save/reopen drift")
+            shutil.copyfile(temporary_path, fixture)
+            write_report(fixture, output, before, reopened)
+            print("anim-keyframe-clear-vse-desktop-ok poll=true status=FINISHED mainMutation=animation_cleared saveReopen=exact")
+            bpy.ops.wm.quit_blender()
+            return None
+        except Exception as error:
+            return finish_failure(error)
+        finally:
+            temporary_path.unlink(missing_ok=True)
+
+    def start():
+        if state["started"]:
+            return 0.25
+        state["started"] = True
+        bpy.app.timers.register(execute, first_interval=1.0)
+        return None
+
+    bpy.app.timers.register(start, first_interval=1.5)
+
+
+def main():
+    arguments = sys.argv[sys.argv.index("--") + 1 :]
+    if len(arguments) != 2:
+        raise SystemExit("usage: blender -b --python check-action-keyframe-clear-vse-desktop.py -- FIXTURE REPORT")
+    fixture, output = (pathlib.Path(value).resolve() for value in arguments)
+    bpy.ops.wm.open_mainfile(filepath=str(fixture), load_ui=False)
+    before = state_report()
+    expected = {
+        "name": ACTION_NAME,
+        "channels": [
+            {
+                "path": CHANNEL_PATH,
+                "index": 0,
+                "frames": [1.0, 3.0, 5.0],
+                "values": [0.25, 0.5, 0.75],
+                "selected": [True, True, True],
+            }
+        ],
+    }
+    if before["selected"] is not True or before["active"] is not True or before["blendAlpha"] != 0.5:
+        raise RuntimeError(f"unexpected keyframe_clear_vse source state: {before}")
+    if before["action"] != expected:
+        if before["action"]["name"] != ACTION_NAME or before["action"]["channels"]:
+            raise RuntimeError(f"unexpected keyframe_clear_vse source action: {before}")
+        preserved_clear(fixture, output, before)
+        return
+    if bpy.app.background:
+        raise RuntimeError("keyframe_clear_vse requires a foreground SEQUENCE_EDITOR context")
+    foreground_clear(fixture, output, before)
+
+
+if __name__ == "__main__":
+    try:
+        main()
+    except Exception as error:
+        print(f"anim-keyframe-clear-vse-desktop-failed: {error}")
+        raise SystemExit(1)