108 lines
2.7 KiB
TypeScript
108 lines
2.7 KiB
TypeScript
import type { TrackType } from "@/types/timeline";
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// Track color definitions
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export const TRACK_COLORS: Record<
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TrackType,
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{ solid: string; background: string; border: string }
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> = {
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media: {
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solid: "bg-blue-500",
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background: "",
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border: "",
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},
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text: {
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solid: "bg-[#5DBAA0]",
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background: "bg-[#5DBAA0]",
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border: "",
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},
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audio: {
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solid: "bg-green-500",
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background: "bg-[#915DBE]",
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border: "",
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},
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} as const;
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// Utility functions
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export function getTrackColors(type: TrackType) {
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return TRACK_COLORS[type];
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}
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export function getTrackElementClasses(type: TrackType) {
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const colors = getTrackColors(type);
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return `${colors.background} ${colors.border}`;
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}
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// Track height definitions
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export const TRACK_HEIGHTS: Record<TrackType, number> = {
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media: 60,
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text: 25,
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audio: 50,
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} as const;
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// Utility function for track heights
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export function getTrackHeight(type: TrackType): number {
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return TRACK_HEIGHTS[type];
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}
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// Calculate cumulative height up to (but not including) a track index
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export function getCumulativeHeightBefore(
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tracks: Array<{ type: TrackType }>,
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trackIndex: number
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): number {
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const GAP = 4; // 4px gap between tracks (equivalent to Tailwind's gap-1)
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return tracks
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.slice(0, trackIndex)
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.reduce((sum, track) => sum + getTrackHeight(track.type) + GAP, 0);
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}
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// Calculate total height of all tracks
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export function getTotalTracksHeight(
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tracks: Array<{ type: TrackType }>
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): number {
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const GAP = 4; // 4px gap between tracks (equivalent to Tailwind's gap-1)
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const tracksHeight = tracks.reduce(
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(sum, track) => sum + getTrackHeight(track.type),
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0
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);
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const gapsHeight = Math.max(0, tracks.length - 1) * GAP; // n-1 gaps for n tracks
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return tracksHeight + gapsHeight;
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}
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// Other timeline constants
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export const TIMELINE_CONSTANTS = {
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ELEMENT_MIN_WIDTH: 80,
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PIXELS_PER_SECOND: 50,
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TRACK_HEIGHT: 60, // Default fallback
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DEFAULT_TEXT_DURATION: 5,
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DEFAULT_IMAGE_DURATION: 5,
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ZOOM_LEVELS: [0.25, 0.5, 1, 1.5, 2, 3, 4],
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} as const;
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// FPS presets for project settings
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export const FPS_PRESETS = [
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{ value: "24", label: "24 fps" },
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{ value: "25", label: "25 fps" },
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{ value: "30", label: "30 fps" },
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{ value: "60", label: "60 fps" },
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{ value: "120", label: "120 fps" },
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] as const;
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// Frame snapping utilities
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export function timeToFrame(time: number, fps: number): number {
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return Math.round(time * fps);
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}
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export function frameToTime(frame: number, fps: number): number {
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return frame / fps;
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}
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export function snapTimeToFrame(time: number, fps: number): number {
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if (fps <= 0) return time; // Fallback for invalid FPS
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const frame = timeToFrame(time, fps);
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return frameToTime(frame, fps);
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}
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export function getFrameDuration(fps: number): number {
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return 1 / fps;
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}
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