|
@@ -0,0 +1,405 @@
|
|
|
|
|
+import type { ColorInput } from "@opentui/core";
|
|
|
|
|
+import { RGBA } from "@opentui/core";
|
|
|
|
|
+import type { ColorGenerator } from "opentui-spinner";
|
|
|
|
|
+
|
|
|
|
|
+interface AdvancedGradientOptions {
|
|
|
|
|
+ colors: ColorInput[];
|
|
|
|
|
+ trailLength: number;
|
|
|
|
|
+ defaultColor?: ColorInput;
|
|
|
|
|
+ direction?: "forward" | "backward" | "bidirectional";
|
|
|
|
|
+ holdFrames?: { start?: number; end?: number };
|
|
|
|
|
+}
|
|
|
|
|
+
|
|
|
|
|
+interface ScannerState {
|
|
|
|
|
+ activePosition: number;
|
|
|
|
|
+ isHolding: boolean;
|
|
|
|
|
+ holdProgress: number;
|
|
|
|
|
+ holdTotal: number;
|
|
|
|
|
+ movementProgress: number;
|
|
|
|
|
+ movementTotal: number;
|
|
|
|
|
+ isMovingForward: boolean;
|
|
|
|
|
+}
|
|
|
|
|
+
|
|
|
|
|
+function getScannerState(
|
|
|
|
|
+ frameIndex: number,
|
|
|
|
|
+ totalChars: number,
|
|
|
|
|
+ options: Pick<AdvancedGradientOptions, "direction" | "holdFrames">,
|
|
|
|
|
+): ScannerState {
|
|
|
|
|
+ const { direction = "forward", holdFrames = {} } = options;
|
|
|
|
|
+
|
|
|
|
|
+ if (direction === "bidirectional") {
|
|
|
|
|
+ const forwardFrames = totalChars;
|
|
|
|
|
+ const holdEndFrames = holdFrames.end ?? 0;
|
|
|
|
|
+ const backwardFrames = totalChars - 1;
|
|
|
|
|
+
|
|
|
|
|
+ if (frameIndex < forwardFrames) {
|
|
|
|
|
+ // Moving forward
|
|
|
|
|
+ return {
|
|
|
|
|
+ activePosition: frameIndex,
|
|
|
|
|
+ isHolding: false,
|
|
|
|
|
+ holdProgress: 0,
|
|
|
|
|
+ holdTotal: 0,
|
|
|
|
|
+ movementProgress: frameIndex,
|
|
|
|
|
+ movementTotal: forwardFrames,
|
|
|
|
|
+ isMovingForward: true,
|
|
|
|
|
+ };
|
|
|
|
|
+ } else if (frameIndex < forwardFrames + holdEndFrames) {
|
|
|
|
|
+ // Holding at end
|
|
|
|
|
+ return {
|
|
|
|
|
+ activePosition: totalChars - 1,
|
|
|
|
|
+ isHolding: true,
|
|
|
|
|
+ holdProgress: frameIndex - forwardFrames,
|
|
|
|
|
+ holdTotal: holdEndFrames,
|
|
|
|
|
+ movementProgress: 0,
|
|
|
|
|
+ movementTotal: 0,
|
|
|
|
|
+ isMovingForward: true,
|
|
|
|
|
+ };
|
|
|
|
|
+ } else if (frameIndex < forwardFrames + holdEndFrames + backwardFrames) {
|
|
|
|
|
+ // Moving backward
|
|
|
|
|
+ const backwardIndex = frameIndex - forwardFrames - holdEndFrames;
|
|
|
|
|
+ return {
|
|
|
|
|
+ activePosition: totalChars - 2 - backwardIndex,
|
|
|
|
|
+ isHolding: false,
|
|
|
|
|
+ holdProgress: 0,
|
|
|
|
|
+ holdTotal: 0,
|
|
|
|
|
+ movementProgress: backwardIndex,
|
|
|
|
|
+ movementTotal: backwardFrames,
|
|
|
|
|
+ isMovingForward: false,
|
|
|
|
|
+ };
|
|
|
|
|
+ } else {
|
|
|
|
|
+ // Holding at start
|
|
|
|
|
+ return {
|
|
|
|
|
+ activePosition: 0,
|
|
|
|
|
+ isHolding: true,
|
|
|
|
|
+ holdProgress:
|
|
|
|
|
+ frameIndex - forwardFrames - holdEndFrames - backwardFrames,
|
|
|
|
|
+ holdTotal: holdFrames.start ?? 0,
|
|
|
|
|
+ movementProgress: 0,
|
|
|
|
|
+ movementTotal: 0,
|
|
|
|
|
+ isMovingForward: false,
|
|
|
|
|
+ };
|
|
|
|
|
+ }
|
|
|
|
|
+ } else if (direction === "backward") {
|
|
|
|
|
+ return {
|
|
|
|
|
+ activePosition: totalChars - 1 - (frameIndex % totalChars),
|
|
|
|
|
+ isHolding: false,
|
|
|
|
|
+ holdProgress: 0,
|
|
|
|
|
+ holdTotal: 0,
|
|
|
|
|
+ movementProgress: frameIndex % totalChars,
|
|
|
|
|
+ movementTotal: totalChars,
|
|
|
|
|
+ isMovingForward: false,
|
|
|
|
|
+ };
|
|
|
|
|
+ } else {
|
|
|
|
|
+ return {
|
|
|
|
|
+ activePosition: frameIndex % totalChars,
|
|
|
|
|
+ isHolding: false,
|
|
|
|
|
+ holdProgress: 0,
|
|
|
|
|
+ holdTotal: 0,
|
|
|
|
|
+ movementProgress: frameIndex % totalChars,
|
|
|
|
|
+ movementTotal: totalChars,
|
|
|
|
|
+ isMovingForward: true,
|
|
|
|
|
+ };
|
|
|
|
|
+ }
|
|
|
|
|
+}
|
|
|
|
|
+
|
|
|
|
|
+function calculateColorIndex(
|
|
|
|
|
+ frameIndex: number,
|
|
|
|
|
+ charIndex: number,
|
|
|
|
|
+ totalChars: number,
|
|
|
|
|
+ options: Pick<
|
|
|
|
|
+ AdvancedGradientOptions,
|
|
|
|
|
+ "direction" | "holdFrames" | "trailLength"
|
|
|
|
|
+ >,
|
|
|
|
|
+ state?: ScannerState,
|
|
|
|
|
+): number {
|
|
|
|
|
+ const { trailLength } = options;
|
|
|
|
|
+ const { activePosition, isHolding, holdProgress, isMovingForward } =
|
|
|
|
|
+ state ?? getScannerState(frameIndex, totalChars, options);
|
|
|
|
|
+
|
|
|
|
|
+ // Calculate directional distance (positive means trailing behind)
|
|
|
|
|
+ const directionalDistance = isMovingForward
|
|
|
|
|
+ ? activePosition - charIndex // For forward: trail is to the left (lower indices)
|
|
|
|
|
+ : charIndex - activePosition; // For backward: trail is to the right (higher indices)
|
|
|
|
|
+
|
|
|
|
|
+ // Handle hold frame fading: keep the lead bright, fade the trail
|
|
|
|
|
+ if (isHolding) {
|
|
|
|
|
+ // Shift the color index by how long we've been holding
|
|
|
|
|
+ return directionalDistance + holdProgress;
|
|
|
|
|
+ }
|
|
|
|
|
+
|
|
|
|
|
+ // Normal movement - show gradient trail only behind the movement direction
|
|
|
|
|
+ if (directionalDistance > 0 && directionalDistance < trailLength) {
|
|
|
|
|
+ return directionalDistance;
|
|
|
|
|
+ }
|
|
|
|
|
+
|
|
|
|
|
+ // At the active position, show the brightest color
|
|
|
|
|
+ if (directionalDistance === 0) {
|
|
|
|
|
+ return 0;
|
|
|
|
|
+ }
|
|
|
|
|
+
|
|
|
|
|
+ return -1;
|
|
|
|
|
+}
|
|
|
|
|
+
|
|
|
|
|
+function createKnightRiderTrail(
|
|
|
|
|
+ options: AdvancedGradientOptions,
|
|
|
|
|
+): ColorGenerator {
|
|
|
|
|
+ const { colors, defaultColor } = options;
|
|
|
|
|
+
|
|
|
|
|
+ // Use the provided defaultColor if it's an RGBA instance, otherwise convert/default
|
|
|
|
|
+ // We use RGBA.fromHex for the fallback to ensure we have an RGBA object.
|
|
|
|
|
+ // Note: If defaultColor is a string, we convert it once here.
|
|
|
|
|
+ const defaultRgba =
|
|
|
|
|
+ defaultColor instanceof RGBA
|
|
|
|
|
+ ? defaultColor
|
|
|
|
|
+ : RGBA.fromHex((defaultColor as string) || "#000000");
|
|
|
|
|
+
|
|
|
|
|
+ let cachedFrameIndex = -1;
|
|
|
|
|
+ let cachedState: ScannerState | null = null;
|
|
|
|
|
+
|
|
|
|
|
+ return (
|
|
|
|
|
+ frameIndex: number,
|
|
|
|
|
+ charIndex: number,
|
|
|
|
|
+ _totalFrames: number,
|
|
|
|
|
+ totalChars: number,
|
|
|
|
|
+ ) => {
|
|
|
|
|
+ if (frameIndex !== cachedFrameIndex) {
|
|
|
|
|
+ cachedFrameIndex = frameIndex;
|
|
|
|
|
+ cachedState = getScannerState(frameIndex, totalChars, options);
|
|
|
|
|
+ }
|
|
|
|
|
+
|
|
|
|
|
+ const state = cachedState!;
|
|
|
|
|
+
|
|
|
|
|
+ const index = calculateColorIndex(
|
|
|
|
|
+ frameIndex,
|
|
|
|
|
+ charIndex,
|
|
|
|
|
+ totalChars,
|
|
|
|
|
+ options,
|
|
|
|
|
+ state,
|
|
|
|
|
+ );
|
|
|
|
|
+
|
|
|
|
|
+ // Calculate global fade for inactive dots during hold or movement
|
|
|
|
|
+ const {
|
|
|
|
|
+ isHolding,
|
|
|
|
|
+ holdProgress,
|
|
|
|
|
+ holdTotal,
|
|
|
|
|
+ movementProgress,
|
|
|
|
|
+ movementTotal,
|
|
|
|
|
+ } = state;
|
|
|
|
|
+
|
|
|
|
|
+ let alpha = 1.0;
|
|
|
|
|
+ if (isHolding && holdTotal > 0) {
|
|
|
|
|
+ // Fade out linearly
|
|
|
|
|
+ const progress = Math.min(holdProgress / holdTotal, 1);
|
|
|
|
|
+ alpha = Math.max(0, 1 - progress);
|
|
|
|
|
+ } else if (!isHolding && movementTotal > 0) {
|
|
|
|
|
+ // Fade in linearly during movement
|
|
|
|
|
+ const progress = Math.min(
|
|
|
|
|
+ movementProgress / Math.max(1, movementTotal - 1),
|
|
|
|
|
+ 1,
|
|
|
|
|
+ );
|
|
|
|
|
+ alpha = progress;
|
|
|
|
|
+ }
|
|
|
|
|
+
|
|
|
|
|
+ // Mutate the alpha of the default RGBA object
|
|
|
|
|
+ // This assumes single-threaded, synchronous rendering per frame
|
|
|
|
|
+ // where we can modify the state for the current frame.
|
|
|
|
|
+ // Since this is run for every char in the frame, setting it repeatedly to the same value is fine.
|
|
|
|
|
+ defaultRgba.a = alpha;
|
|
|
|
|
+
|
|
|
|
|
+ if (index === -1) {
|
|
|
|
|
+ return defaultRgba;
|
|
|
|
|
+ }
|
|
|
|
|
+
|
|
|
|
|
+ return colors[index] ?? defaultRgba;
|
|
|
|
|
+ };
|
|
|
|
|
+}
|
|
|
|
|
+
|
|
|
|
|
+/**
|
|
|
|
|
+ * Derives a gradient of tail colors from a single bright color
|
|
|
|
|
+ * @param brightColor The brightest color (center/head of the scanner)
|
|
|
|
|
+ * @param steps Number of gradient steps (default: 6)
|
|
|
|
|
+ * @returns Array of RGBA colors from brightest to darkest
|
|
|
|
|
+ */
|
|
|
|
|
+export function deriveTrailColors(
|
|
|
|
|
+ brightColor: ColorInput,
|
|
|
|
|
+ steps: number = 6,
|
|
|
|
|
+): RGBA[] {
|
|
|
|
|
+ const baseRgba =
|
|
|
|
|
+ brightColor instanceof RGBA
|
|
|
|
|
+ ? brightColor
|
|
|
|
|
+ : RGBA.fromHex(brightColor as string);
|
|
|
|
|
+
|
|
|
|
|
+ const colors: RGBA[] = [];
|
|
|
|
|
+
|
|
|
|
|
+ for (let i = 0; i < steps; i++) {
|
|
|
|
|
+ // Progressive darkening:
|
|
|
|
|
+ // i=0: 100% brightness (original color)
|
|
|
|
|
+ // i=1: add slight bloom/glare (lighten)
|
|
|
|
|
+ // i=2+: progressively darken
|
|
|
|
|
+ let factor: number;
|
|
|
|
|
+
|
|
|
|
|
+ if (i === 0) {
|
|
|
|
|
+ factor = 1.0; // Original brightness
|
|
|
|
|
+ } else if (i === 1) {
|
|
|
|
|
+ factor = 1.2; // Slight bloom/glare effect
|
|
|
|
|
+ } else {
|
|
|
|
|
+ // Exponential decay for natural-looking trail fade
|
|
|
|
|
+ factor = Math.pow(0.6, i - 1);
|
|
|
|
|
+ }
|
|
|
|
|
+
|
|
|
|
|
+ const r = Math.min(1.0, baseRgba.r * factor);
|
|
|
|
|
+ const g = Math.min(1.0, baseRgba.g * factor);
|
|
|
|
|
+ const b = Math.min(1.0, baseRgba.b * factor);
|
|
|
|
|
+
|
|
|
|
|
+ colors.push(RGBA.fromValues(r, g, b, 1.0));
|
|
|
|
|
+ }
|
|
|
|
|
+
|
|
|
|
|
+ return colors;
|
|
|
|
|
+}
|
|
|
|
|
+
|
|
|
|
|
+/**
|
|
|
|
|
+ * Derives the inactive/default color from a bright color
|
|
|
|
|
+ * @param brightColor The brightest color (center/head of the scanner)
|
|
|
|
|
+ * @param factor Brightness factor for inactive color (default: 0.2)
|
|
|
|
|
+ * @returns A much darker version suitable for inactive dots
|
|
|
|
|
+ */
|
|
|
|
|
+export function deriveInactiveColor(
|
|
|
|
|
+ brightColor: ColorInput,
|
|
|
|
|
+ factor: number = 0.2,
|
|
|
|
|
+): RGBA {
|
|
|
|
|
+ const baseRgba =
|
|
|
|
|
+ brightColor instanceof RGBA
|
|
|
|
|
+ ? brightColor
|
|
|
|
|
+ : RGBA.fromHex(brightColor as string);
|
|
|
|
|
+
|
|
|
|
|
+ const r = baseRgba.r * factor;
|
|
|
|
|
+ const g = baseRgba.g * factor;
|
|
|
|
|
+ const b = baseRgba.b * factor;
|
|
|
|
|
+
|
|
|
|
|
+ return RGBA.fromValues(r, g, b, 1.0);
|
|
|
|
|
+}
|
|
|
|
|
+
|
|
|
|
|
+export type KnightRiderStyle = "blocks" | "diamonds";
|
|
|
|
|
+
|
|
|
|
|
+export interface KnightRiderOptions {
|
|
|
|
|
+ width?: number;
|
|
|
|
|
+ style?: KnightRiderStyle;
|
|
|
|
|
+ holdStart?: number;
|
|
|
|
|
+ holdEnd?: number;
|
|
|
|
|
+ colors?: ColorInput[];
|
|
|
|
|
+ /** Single color to derive trail from (alternative to providing colors array) */
|
|
|
|
|
+ color?: ColorInput;
|
|
|
|
|
+ /** Number of trail steps when using single color (default: 6) */
|
|
|
|
|
+ trailSteps?: number;
|
|
|
|
|
+ defaultColor?: ColorInput;
|
|
|
|
|
+ /** Brightness factor for inactive color when using single color (default: 0.2) */
|
|
|
|
|
+ inactiveFactor?: number;
|
|
|
|
|
+}
|
|
|
|
|
+
|
|
|
|
|
+/**
|
|
|
|
|
+ * Creates frame strings for a Knight Rider style scanner animation
|
|
|
|
|
+ * @param options Configuration options for the Knight Rider effect
|
|
|
|
|
+ * @returns Array of frame strings
|
|
|
|
|
+ */
|
|
|
|
|
+export function createFrames(options: KnightRiderOptions = {}): string[] {
|
|
|
|
|
+ const width = options.width ?? 8;
|
|
|
|
|
+ const style = options.style ?? "diamonds";
|
|
|
|
|
+ const holdStart = options.holdStart ?? 30;
|
|
|
|
|
+ const holdEnd = options.holdEnd ?? 9;
|
|
|
|
|
+
|
|
|
|
|
+ const colors =
|
|
|
|
|
+ options.colors ??
|
|
|
|
|
+ (options.color
|
|
|
|
|
+ ? deriveTrailColors(options.color, options.trailSteps)
|
|
|
|
|
+ : [
|
|
|
|
|
+ RGBA.fromHex("#ff0000"), // Brightest Red (Center)
|
|
|
|
|
+ RGBA.fromHex("#ff5555"), // Glare/Bloom
|
|
|
|
|
+ RGBA.fromHex("#dd0000"), // Trail 1
|
|
|
|
|
+ RGBA.fromHex("#aa0000"), // Trail 2
|
|
|
|
|
+ RGBA.fromHex("#770000"), // Trail 3
|
|
|
|
|
+ RGBA.fromHex("#440000"), // Trail 4
|
|
|
|
|
+ ]);
|
|
|
|
|
+
|
|
|
|
|
+ const defaultColor =
|
|
|
|
|
+ options.defaultColor ??
|
|
|
|
|
+ (options.color
|
|
|
|
|
+ ? deriveInactiveColor(options.color, options.inactiveFactor)
|
|
|
|
|
+ : RGBA.fromHex("#330000"));
|
|
|
|
|
+
|
|
|
|
|
+ const trailOptions = {
|
|
|
|
|
+ colors,
|
|
|
|
|
+ trailLength: colors.length,
|
|
|
|
|
+ defaultColor,
|
|
|
|
|
+ direction: "bidirectional" as const,
|
|
|
|
|
+ holdFrames: { start: holdStart, end: holdEnd },
|
|
|
|
|
+ };
|
|
|
|
|
+
|
|
|
|
|
+ // Bidirectional cycle: Forward (width) + Hold End + Backward (width-1) + Hold Start
|
|
|
|
|
+ const totalFrames = width + holdEnd + (width - 1) + holdStart;
|
|
|
|
|
+
|
|
|
|
|
+ // Generate dynamic frames where inactive pixels are dots and active ones are blocks
|
|
|
|
|
+ const frames = Array.from({ length: totalFrames }, (_, frameIndex) => {
|
|
|
|
|
+ return Array.from({ length: width }, (_, charIndex) => {
|
|
|
|
|
+ const index = calculateColorIndex(
|
|
|
|
|
+ frameIndex,
|
|
|
|
|
+ charIndex,
|
|
|
|
|
+ width,
|
|
|
|
|
+ trailOptions,
|
|
|
|
|
+ );
|
|
|
|
|
+
|
|
|
|
|
+ if (style === "diamonds") {
|
|
|
|
|
+ const shapes = ["⬥", "◆", "⬩", "⬪"];
|
|
|
|
|
+ if (index >= 0 && index < trailOptions.colors.length) {
|
|
|
|
|
+ return shapes[Math.min(index, shapes.length - 1)];
|
|
|
|
|
+ }
|
|
|
|
|
+ return "·";
|
|
|
|
|
+ }
|
|
|
|
|
+
|
|
|
|
|
+ // Default to blocks
|
|
|
|
|
+ // It's active if we have a valid color index that is within our colors array
|
|
|
|
|
+ const isActive = index >= 0 && index < trailOptions.colors.length;
|
|
|
|
|
+ return isActive ? "■" : "⬝";
|
|
|
|
|
+ }).join("");
|
|
|
|
|
+ });
|
|
|
|
|
+
|
|
|
|
|
+ return frames;
|
|
|
|
|
+}
|
|
|
|
|
+
|
|
|
|
|
+/**
|
|
|
|
|
+ * Creates a color generator function for Knight Rider style scanner animation
|
|
|
|
|
+ * @param options Configuration options for the Knight Rider effect
|
|
|
|
|
+ * @returns ColorGenerator function
|
|
|
|
|
+ */
|
|
|
|
|
+export function createColors(options: KnightRiderOptions = {}): ColorGenerator {
|
|
|
|
|
+ const holdStart = options.holdStart ?? 30;
|
|
|
|
|
+ const holdEnd = options.holdEnd ?? 9;
|
|
|
|
|
+
|
|
|
|
|
+ const colors =
|
|
|
|
|
+ options.colors ??
|
|
|
|
|
+ (options.color
|
|
|
|
|
+ ? deriveTrailColors(options.color, options.trailSteps)
|
|
|
|
|
+ : [
|
|
|
|
|
+ RGBA.fromHex("#ff0000"), // Brightest Red (Center)
|
|
|
|
|
+ RGBA.fromHex("#ff5555"), // Glare/Bloom
|
|
|
|
|
+ RGBA.fromHex("#dd0000"), // Trail 1
|
|
|
|
|
+ RGBA.fromHex("#aa0000"), // Trail 2
|
|
|
|
|
+ RGBA.fromHex("#770000"), // Trail 3
|
|
|
|
|
+ RGBA.fromHex("#440000"), // Trail 4
|
|
|
|
|
+ ]);
|
|
|
|
|
+
|
|
|
|
|
+ const defaultColor =
|
|
|
|
|
+ options.defaultColor ??
|
|
|
|
|
+ (options.color
|
|
|
|
|
+ ? deriveInactiveColor(options.color, options.inactiveFactor)
|
|
|
|
|
+ : RGBA.fromHex("#330000"));
|
|
|
|
|
+
|
|
|
|
|
+ const trailOptions = {
|
|
|
|
|
+ colors,
|
|
|
|
|
+ trailLength: colors.length,
|
|
|
|
|
+ defaultColor,
|
|
|
|
|
+ direction: "bidirectional" as const,
|
|
|
|
|
+ holdFrames: { start: holdStart, end: holdEnd },
|
|
|
|
|
+ };
|
|
|
|
|
+
|
|
|
|
|
+ return createKnightRiderTrail(trailOptions);
|
|
|
|
|
+}
|
Sebastian Herrlinger