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"use client";
import { useState, useRef, useEffect, useCallback } from "react";
import { useTimelineStore } from "@/stores/timeline-store";
import { usePlaybackStore } from "@/stores/playback-store";
import { useTimelineZoom } from "@/hooks/use-timeline-zoom";
import { useSelectionBox } from "@/hooks/use-selection-box";
import { SnapPoint } from "@/hooks/use-timeline-snapping";
import { TIMELINE_CONSTANTS } from "@/constants/timeline-constants";
import { TimelineToolbar } from "./timeline/timeline-toolbar";
import { TimelineContent } from "./timeline/timeline-content";
import { useTimelineDragHandlers } from "./timeline/timeline-drag-handlers";
import { useTimelineActionHandlers } from "./timeline/timeline-action-handlers";
import { useTimelineScrollSync } from "./timeline/timeline-scroll-sync";
import { useTimelineContentClick } from "./timeline/timeline-content-click";
import { useTimelineWheelHandler } from "./timeline/timeline-wheel-handler";
export function Timeline() {
// Timeline shows all tracks (video, audio, effects) and their elements.
// You can drag media here to add it to your project.
// elements can be trimmed, deleted, and moved.
const {
tracks,
getTotalDuration,
selectedElements,
clearSelectedElements,
setSelectedElements,
dragState,
snappingEnabled,
} = useTimelineStore();
const { currentTime, duration, seek, setDuration } = usePlaybackStore();
const [isDragOver, setIsDragOver] = useState(false);
const [isProcessing, setIsProcessing] = useState(false);
const [progress, setProgress] = useState(0);
const timelineRef = useRef<HTMLDivElement>(null);
const rulerRef = useRef<HTMLDivElement>(null);
const [isInTimeline, setIsInTimeline] = useState(false);
// Timeline zoom functionality
const { zoomLevel, setZoomLevel, handleWheel } = useTimelineZoom({
containerRef: timelineRef,
isInTimeline,
});
// Dynamic timeline width calculation based on playhead position and duration
const dynamicTimelineWidth = Math.max(
(duration || 0) * TIMELINE_CONSTANTS.PIXELS_PER_SECOND * zoomLevel, // Base width from duration
(currentTime + 30) * TIMELINE_CONSTANTS.PIXELS_PER_SECOND * zoomLevel, // Width to show current time + 30 seconds buffer
timelineRef.current?.clientWidth || 1000 // Minimum width
);
// Scroll synchronization and auto-scroll to playhead
const rulerScrollRef = useRef<HTMLDivElement>(null);
const tracksScrollRef = useRef<HTMLDivElement>(null);
const trackLabelsRef = useRef<HTMLDivElement>(null);
const playheadRef = useRef<HTMLDivElement>(null);
const trackLabelsScrollRef = useRef<HTMLDivElement>(null);
// Selection box functionality
const tracksContainerRef = useRef<HTMLDivElement>(null);
const {
selectionBox,
handleMouseDown: handleSelectionMouseDown,
isSelecting,
justFinishedSelecting,
} = useSelectionBox({
containerRef: tracksContainerRef,
playheadRef,
onSelectionComplete: (elements) => {
console.log(JSON.stringify({ onSelectionComplete: elements.length }));
setSelectedElements(elements);
},
});
// Calculate snap indicator state
const [currentSnapPoint, setCurrentSnapPoint] = useState<SnapPoint | null>(
null
);
const showSnapIndicator =
dragState.isDragging && snappingEnabled && currentSnapPoint !== null;
// Callback to handle snap point changes from TimelineTrackContent
const handleSnapPointChange = useCallback((snapPoint: SnapPoint | null) => {
setCurrentSnapPoint(snapPoint);
}, []);
// Timeline content click handler
const { handleTimelineContentClick } = useTimelineContentClick({
duration,
zoomLevel,
seek,
rulerScrollRef,
tracksScrollRef,
clearSelectedElements,
isSelecting,
justFinishedSelecting,
playheadRef,
});
// Update timeline duration when tracks change
useEffect(() => {
const totalDuration = getTotalDuration();
setDuration(Math.max(totalDuration, 10)); // Minimum 10 seconds for empty timeline
}, [tracks, setDuration, getTotalDuration]);
// Drag handlers
const { dragProps } = useTimelineDragHandlers({
isDragOver,
setIsDragOver,
isProcessing,
setIsProcessing,
progress,
setProgress,
});
// Action handlers
const {
handleSplitSelected,
handleDuplicateSelected,
handleFreezeSelected,
handleSplitAndKeepLeft,
handleSplitAndKeepRight,
handleSeparateAudio,
handleDeleteSelected,
} = useTimelineActionHandlers();
// Scroll synchronization
useTimelineScrollSync({
rulerScrollRef,
tracksScrollRef,
trackLabelsScrollRef,
});
// Wheel event handling
useTimelineWheelHandler({
timelineRef,
isInTimeline,
handleWheel,
});
return (
<div
className={`h-full flex flex-col transition-colors duration-200 relative bg-panel rounded-sm overflow-hidden`}
{...dragProps}
onMouseEnter={() => setIsInTimeline(true)}
onMouseLeave={() => setIsInTimeline(false)}
>
{/* Toolbar */}
<TimelineToolbar
handleSplitSelected={handleSplitSelected}
handleSplitAndKeepLeft={handleSplitAndKeepLeft}
handleSplitAndKeepRight={handleSplitAndKeepRight}
handleSeparateAudio={handleSeparateAudio}
handleDuplicateSelected={handleDuplicateSelected}
handleFreezeSelected={handleFreezeSelected}
handleDeleteSelected={handleDeleteSelected}
/>
{/* Timeline Container */}
<div
ref={timelineRef}
className="relative h-full w-full overflow-auto border"
onMouseEnter={() => setIsInTimeline(true)}
onMouseLeave={() => setIsInTimeline(false)}
onMouseDown={handleSelectionMouseDown}
onClick={handleTimelineContentClick}
>
<TimelineContent
dynamicTimelineWidth={dynamicTimelineWidth}
tracks={tracks}
duration={duration}
zoomLevel={zoomLevel}
currentTime={currentTime}
seek={seek}
rulerRef={rulerRef}
rulerScrollRef={rulerScrollRef}
tracksScrollRef={tracksScrollRef}
playheadRef={playheadRef}
trackLabelsRef={trackLabelsRef}
timelineRef={timelineRef}
handleSelectionMouseDown={handleSelectionMouseDown}
handleTimelineContentClick={handleTimelineContentClick}
handleSnapPointChange={handleSnapPointChange}
clearSelectedElements={clearSelectedElements}
selectionBox={selectionBox}
tracksContainerRef={tracksContainerRef}
currentSnapPoint={currentSnapPoint}
showSnapIndicator={showSnapIndicator}
/>
</div>
</div>
);
}
|
