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"use client";
import { useCallback, useEffect, useMemo, useRef, useState } from "react";
import { useEditor } from "@/editor/use-editor";
import { registerCanceller } from "@/editor/cancel-interaction";
import type { NormalizedCubicBezier } from "@/animation/types";
import { useKeyframeSelection } from "@/timeline/hooks/element/use-keyframe-selection";
import {
applyGraphEditorCurvePreview,
buildGraphEditorCurvePatches,
resolveGraphEditorSelectionState,
type GraphEditorSelectionState,
} from "./session";
export function useGraphEditorController() {
const editor = useEditor();
const renderTracks = useEditor(
(currentEditor) =>
currentEditor.timeline.getPreviewTracks() ??
currentEditor.scenes.getActiveScene().tracks,
);
const { selectedKeyframes } = useKeyframeSelection();
const [open, setOpen] = useState(false);
const [activeComponentKey, setActiveComponentKey] = useState<string | null>(
null,
);
const hasPreviewRef = useRef(false);
const state = useMemo<GraphEditorSelectionState>(
() =>
resolveGraphEditorSelectionState({
tracks: renderTracks,
selectedKeyframes,
preferredComponentKey: activeComponentKey,
}),
[activeComponentKey, renderTracks, selectedKeyframes],
);
const stateKey =
state.status === "ready"
? `${state.trackId}:${state.elementId}:${state.activeComponentKey}:${state.segments
.map(
(segment) =>
`${segment.propertyPath}:${segment.keyframeId}:${segment.context.componentKey}`,
)
.join("|")}`
: `${state.status}:${state.reason}:${state.activeComponentKey ?? "none"}`;
const previousStateKeyRef = useRef(stateKey);
const discardPreview = useCallback(() => {
if (!hasPreviewRef.current) {
return;
}
editor.timeline.discardPreview();
hasPreviewRef.current = false;
}, [editor]);
useEffect(() => {
if (hasPreviewRef.current && previousStateKeyRef.current !== stateKey) {
discardPreview();
}
previousStateKeyRef.current = stateKey;
}, [discardPreview, stateKey]);
useEffect(() => {
if (!open) {
return;
}
return registerCanceller({
fn: () => {
discardPreview();
setOpen(false);
},
});
}, [discardPreview, open]);
const handleOpenChange = useCallback(
(nextOpen: boolean) => {
if (!nextOpen) {
discardPreview();
}
setOpen(nextOpen);
},
[discardPreview],
);
const handleActiveComponentKeyChange = useCallback(
(nextComponentKey: string) => {
discardPreview();
setActiveComponentKey(nextComponentKey);
},
[discardPreview],
);
const handlePreviewValue = useCallback(
(nextValue: NormalizedCubicBezier) => {
if (state.status !== "ready") {
return;
}
const nextAnimations = state.segments.reduce(
(animations, segment) =>
segment.allContexts.reduce(
(nextAnimationsForSegment, context) =>
applyGraphEditorCurvePreview({
animations: nextAnimationsForSegment,
context,
cubicBezier: nextValue,
referenceSpanValue: segment.referenceSpanValue,
}),
animations,
),
state.element.animations,
);
editor.timeline.previewElements({
updates: [
{
trackId: state.trackId,
elementId: state.elementId,
updates: { animations: nextAnimations },
},
],
});
hasPreviewRef.current = true;
},
[editor, state],
);
const handleCommitValue = useCallback(
(nextValue: NormalizedCubicBezier) => {
if (state.status !== "ready") {
return;
}
editor.timeline.updateKeyframeCurves({
keyframes: state.segments.flatMap((segment) => {
const patches = buildGraphEditorCurvePatches({
context: segment.context,
cubicBezier: nextValue,
referenceSpanValue: segment.referenceSpanValue,
});
if (!patches) {
return [];
}
return segment.allContexts.flatMap((context) =>
patches.map(({ keyframeId, patch }) => ({
trackId: state.trackId,
elementId: state.elementId,
propertyPath: segment.propertyPath,
componentKey: context.componentKey,
keyframeId,
patch,
})),
);
}),
});
hasPreviewRef.current = false;
},
[editor, state],
);
return {
open,
onOpenChange: handleOpenChange,
canOpen: state.status === "ready",
tooltip: state.status === "ready" ? "Open graph editor" : state.message,
state,
onActiveComponentKeyChange: handleActiveComponentKeyChange,
onPreviewValue: handlePreviewValue,
onCommitValue: handleCommitValue,
onCancelPreview: discardPreview,
};
}
|
