agent-ecosystem/packages/agent-graph/src/canvas/draw-agents.ts

772 lines
22 KiB
TypeScript

/**
* Agent (member/lead) node drawing with holographic effects.
* Adapted from agent-flow's draw-agents.ts (Apache 2.0).
* Uses our GraphNode port type instead of agent-flow's Agent type.
*/
import type { GraphNode } from '../ports/types';
import { COLORS, getStateColor, alphaHex } from '../constants/colors';
import {
NODE,
AGENT_DRAW,
CONTEXT_RING,
ANIM,
MIN_VISIBLE_OPACITY,
} from '../constants/canvas-constants';
import { drawHexagon } from './draw-misc';
import { getAgentGlowSprite, ensureHex, hexWithAlpha } from './render-cache';
/**
* Draw all member/lead nodes on the canvas.
*/
export function drawAgents(
ctx: CanvasRenderingContext2D,
nodes: GraphNode[],
time: number,
selectedId: string | null,
hoveredId: string | null,
focusNodeIds?: ReadonlySet<string> | null,
zoom = 1
): void {
const simplify = zoom < 0.19;
for (const node of nodes) {
if (node.kind !== 'member' && node.kind !== 'lead') continue;
const opacity = getNodeOpacity(node) * getFocusOpacity(node.id, focusNodeIds);
if (opacity < MIN_VISIBLE_OPACITY) continue;
const x = node.x ?? 0;
const y = node.y ?? 0;
const r = node.kind === 'lead' ? NODE.radiusLead : NODE.radiusMember;
const color = node.color ?? getStateColor(node.state);
const isSelected = node.id === selectedId;
const isHovered = node.id === hoveredId;
ctx.save();
ctx.globalAlpha = opacity;
if (simplify) {
drawHexagon(ctx, x, y, r);
ctx.fillStyle = isSelected ? 'rgba(100, 200, 255, 0.15)' : COLORS.nodeInterior;
ctx.fill();
drawHexagon(ctx, x, y, r);
ctx.strokeStyle = hexWithAlpha(color, isHovered ? 0.8 : 0.5);
ctx.lineWidth = isSelected ? 2 : 1;
ctx.stroke();
ctx.beginPath();
ctx.arc(x, y, Math.max(3, r * 0.16), 0, Math.PI * 2);
ctx.fillStyle = hexWithAlpha(color, 0.8);
ctx.fill();
} else {
// Depth shadow
drawDepthShadow(ctx, x, y, r);
// Outer glow
drawGlow(ctx, x, y, r, color);
// Hexagonal body with interior fill
drawHexBody(ctx, x, y, r, color, node.state, time, isSelected, isHovered);
// Avatar: robohash image or fallback letter
drawAvatar(ctx, x, y, r, node.label, color, node.kind === 'lead', node.avatarUrl);
// Breathing animation + launch-stage effects
drawBreathing(ctx, x, y, r, node.state, time, node.spawnStatus);
drawLaunchStage(ctx, x, y, r, node.launchVisualState, time);
}
// Pending approval indicator: pulsing amber ring
if (!simplify && node.pendingApproval) {
const pulseAlpha = 0.3 + 0.35 * Math.sin(time * 7);
const ringR = r + 5;
ctx.beginPath();
ctx.arc(x, y, ringR, 0, Math.PI * 2);
ctx.strokeStyle = hexWithAlpha('#f59e0b', pulseAlpha);
ctx.lineWidth = 2;
ctx.stroke();
// Subtle amber glow
const glowR = r + 12;
const grad = ctx.createRadialGradient(x, y, r, x, y, glowR);
grad.addColorStop(0, hexWithAlpha('#f59e0b', pulseAlpha * 0.25));
grad.addColorStop(1, 'transparent');
ctx.beginPath();
ctx.arc(x, y, glowR, 0, Math.PI * 2);
ctx.fillStyle = grad;
ctx.fill();
}
// Working indicator: subtle spinning arc when member has active task
if (
!simplify &&
node.currentTaskId &&
(node.state === 'active' || node.state === 'thinking' || node.state === 'tool_calling')
) {
const ringR = r + 4;
const rotation = time * 1.5;
ctx.beginPath();
ctx.arc(x, y, ringR, rotation, rotation + Math.PI * 0.8);
ctx.strokeStyle = hexWithAlpha(color, 0.4);
ctx.lineWidth = 1.5;
ctx.stroke();
}
if (!simplify && node.activeTool) {
drawToolCard(ctx, x, y, r, node.activeTool, time);
}
if (!simplify && node.exceptionTone) {
drawExceptionPip(ctx, x, y, r, node.exceptionTone);
}
if (!simplify) {
// Name + role label (single line: "jack · developer")
const labelText = node.role ? `${node.label} · ${node.role}` : node.label;
drawLabel(
ctx,
x,
y,
r,
labelText,
color,
node.runtimeLabel,
node.launchStatusLabel,
node.launchVisualState
);
}
// TODO: Context ring disabled — LeadContextUsage.percent is unreliable
// (jumps due to cache_read variance, contextWindow mismatch with actual model).
// Re-enable when we have stable context window data from modelUsage.
// if (node.kind === 'lead' && node.contextUsage != null) {
// drawContextRing(ctx, x, y, r, node.contextUsage, time);
// }
// Selection ring
if (isSelected) {
drawSelectionRing(ctx, x, y, r, color);
}
ctx.restore();
}
}
/**
* Draw cross-team ghost nodes — semi-transparent dashed hexagons.
*/
export function drawCrossTeamNodes(
ctx: CanvasRenderingContext2D,
nodes: GraphNode[],
time: number,
selectedId: string | null,
hoveredId: string | null,
focusNodeIds?: ReadonlySet<string> | null
): void {
for (const node of nodes) {
if (node.kind !== 'crossteam') continue;
const x = node.x ?? 0;
const y = node.y ?? 0;
const r = NODE.radiusCrossTeam;
const color = node.color ?? '#cc88ff';
const isSelected = node.id === selectedId;
const isHovered = node.id === hoveredId;
ctx.save();
ctx.globalAlpha = (isHovered ? 0.7 : 0.5) * getFocusOpacity(node.id, focusNodeIds);
// Subtle glow
const glowR = r + AGENT_DRAW.glowPadding;
const sprite = getAgentGlowSprite(color, r, glowR);
ctx.drawImage(sprite, x - glowR, y - glowR);
// Dashed hexagon body
drawHexagon(ctx, x, y, r);
ctx.fillStyle = 'rgba(10, 15, 40, 0.4)';
ctx.fill();
ctx.setLineDash([4, 4]);
ctx.strokeStyle = hexWithAlpha(color, 0.6);
ctx.lineWidth = 1.5;
ctx.stroke();
ctx.setLineDash([]);
// Link icon (two arrows ↔) in center
ctx.font = 'bold 12px sans-serif';
ctx.textAlign = 'center';
ctx.textBaseline = 'middle';
ctx.fillStyle = hexWithAlpha(color, 0.8);
ctx.fillText('\u{2194}', x, y); // ↔
// Label below
ctx.globalAlpha = 0.7;
ctx.font = '8px monospace';
ctx.textAlign = 'center';
ctx.textBaseline = 'top';
ctx.fillStyle = hexWithAlpha(color, 0.7);
ctx.fillText(node.label, x, y + r + 6);
// Selection ring
if (isSelected) {
drawSelectionRing(ctx, x, y, r, color);
}
ctx.restore();
}
}
// ─── Private Helpers ────────────────────────────────────────────────────────
function getNodeOpacity(node: GraphNode): number {
if (node.state === 'terminated' || node.state === 'complete') return 0.3;
if (node.spawnStatus === 'spawning') return 0.85;
if (node.spawnStatus === 'waiting') return 0.7;
if (node.spawnStatus === 'offline') return 0;
return 1;
}
function getFocusOpacity(nodeId: string, focusNodeIds?: ReadonlySet<string> | null): number {
return focusNodeIds && !focusNodeIds.has(nodeId) ? 0.25 : 1;
}
function drawExceptionPip(
ctx: CanvasRenderingContext2D,
x: number,
y: number,
r: number,
tone: NonNullable<GraphNode['exceptionTone']>
): void {
const pipX = x + r * 0.58;
const pipY = y - r * 0.58;
const pipColor = tone === 'error' ? '#ef4444' : '#f59e0b';
ctx.save();
ctx.beginPath();
ctx.arc(pipX, pipY, 4.5, 0, Math.PI * 2);
ctx.fillStyle = pipColor;
ctx.fill();
ctx.lineWidth = 1.5;
ctx.strokeStyle = '#050510';
ctx.stroke();
ctx.restore();
}
function drawLaunchStage(
ctx: CanvasRenderingContext2D,
x: number,
y: number,
r: number,
visualState: GraphNode['launchVisualState'],
time: number
): void {
if (!visualState) {
return;
}
ctx.save();
switch (visualState) {
case 'waiting': {
const ringR = r + 7 + Math.sin(time * 3.2) * 1.2;
const pulseAlpha = 0.2 + 0.14 * (0.5 + 0.5 * Math.sin(time * 3.2));
ctx.beginPath();
ctx.arc(x, y, ringR, 0, Math.PI * 2);
ctx.strokeStyle = hexWithAlpha('#d4d4d8', pulseAlpha);
ctx.lineWidth = 2.2;
ctx.stroke();
break;
}
case 'spawning': {
const ringR = r + 7;
const rotation = time * 2.4;
ctx.beginPath();
ctx.arc(x, y, ringR, rotation, rotation + Math.PI * 1.15);
ctx.strokeStyle = hexWithAlpha('#f59e0b', 0.8);
ctx.lineWidth = 2.2;
ctx.lineCap = 'round';
ctx.stroke();
break;
}
case 'runtime_pending': {
const ringR = r + 8;
ctx.beginPath();
ctx.arc(x, y, ringR, 0, Math.PI * 2);
ctx.strokeStyle = hexWithAlpha('#38bdf8', 0.48);
ctx.lineWidth = 1.75;
ctx.stroke();
const orbit = time * 1.6;
const dotR = 2.2;
const dotX = x + Math.cos(orbit) * ringR;
const dotY = y + Math.sin(orbit) * ringR;
ctx.beginPath();
ctx.arc(dotX, dotY, dotR, 0, Math.PI * 2);
ctx.fillStyle = hexWithAlpha('#67e8f9', 0.9);
ctx.fill();
break;
}
case 'settling': {
const ringR = r + 6;
const arc = 0.65 + 0.08 * Math.sin(time * 2.2);
const rotation = time * 1.25;
ctx.beginPath();
ctx.arc(x, y, ringR, rotation, rotation + Math.PI * arc);
ctx.strokeStyle = hexWithAlpha('#22c55e', 0.62);
ctx.lineWidth = 2;
ctx.lineCap = 'round';
ctx.stroke();
break;
}
case 'error': {
const ringR = r + 7 + Math.sin(time * 4) * 0.8;
ctx.beginPath();
ctx.arc(x, y, ringR, Math.PI * 0.2, Math.PI * 1.15);
ctx.strokeStyle = hexWithAlpha('#ef4444', 0.72);
ctx.lineWidth = 2.2;
ctx.lineCap = 'round';
ctx.stroke();
break;
}
}
ctx.restore();
}
function drawDepthShadow(ctx: CanvasRenderingContext2D, x: number, y: number, r: number): void {
ctx.save();
ctx.shadowColor = 'rgba(0, 0, 0, 0.5)';
ctx.shadowBlur = AGENT_DRAW.shadowBlur;
ctx.shadowOffsetX = AGENT_DRAW.shadowOffsetX;
ctx.shadowOffsetY = AGENT_DRAW.shadowOffsetY;
drawHexagon(ctx, x, y, r);
ctx.fillStyle = 'rgba(0, 0, 0, 0.01)';
ctx.fill();
ctx.restore();
}
function drawGlow(
ctx: CanvasRenderingContext2D,
x: number,
y: number,
r: number,
color: string
): void {
const outerR = r + AGENT_DRAW.glowPadding;
const sprite = getAgentGlowSprite(color, r * 0.5, outerR);
ctx.drawImage(sprite, x - outerR, y - outerR);
}
function drawHexBody(
ctx: CanvasRenderingContext2D,
x: number,
y: number,
r: number,
color: string,
state: string,
time: number,
isSelected: boolean,
isHovered: boolean
): void {
// Interior fill
drawHexagon(ctx, x, y, r);
ctx.fillStyle = isSelected ? 'rgba(100, 200, 255, 0.15)' : COLORS.nodeInterior;
ctx.fill();
// Scanline effect
const scanSpeed =
state === 'active' || state === 'thinking' || state === 'tool_calling'
? ANIM.scanline.active
: ANIM.scanline.normal;
const scanY = ((time * scanSpeed) % (r * 2)) - r;
ctx.save();
drawHexagon(ctx, x, y, r);
ctx.clip();
const grad = ctx.createLinearGradient(
x,
y + scanY - AGENT_DRAW.scanlineHalfH,
x,
y + scanY + AGENT_DRAW.scanlineHalfH
);
grad.addColorStop(0, hexWithAlpha(color, 0));
grad.addColorStop(0.5, hexWithAlpha(color, 0.13));
grad.addColorStop(1, hexWithAlpha(color, 0));
ctx.fillStyle = grad;
ctx.fillRect(x - r, y + scanY - AGENT_DRAW.scanlineHalfH, r * 2, AGENT_DRAW.scanlineHalfH * 2);
ctx.restore();
// Border
drawHexagon(ctx, x, y, r);
ctx.strokeStyle = hexWithAlpha(color, isHovered ? 0.8 : 0.5);
ctx.lineWidth = isSelected ? 2 : 1;
ctx.stroke();
}
function truncateCardText(ctx: CanvasRenderingContext2D, text: string, maxWidth: number): string {
if (ctx.measureText(text).width <= maxWidth) return text;
let out = text;
while (out.length > 1 && ctx.measureText(`${out}...`).width > maxWidth) {
out = out.slice(0, -1);
}
return `${out}...`;
}
function drawToolCard(
ctx: CanvasRenderingContext2D,
x: number,
y: number,
r: number,
tool: NonNullable<GraphNode['activeTool']>,
time: number
): void {
const labelBase = tool.preview ? `${tool.name}: ${tool.preview}` : tool.name;
const labelText =
tool.state === 'error'
? `${tool.name}: failed`
: tool.state === 'complete' && tool.resultPreview
? `${tool.name}: ${tool.resultPreview}`
: labelBase;
ctx.save();
ctx.font = '8px monospace';
const truncated = truncateCardText(ctx, labelText, 104);
const textWidth = ctx.measureText(truncated).width;
const cardW = Math.max(62, Math.min(124, textWidth + 24));
const cardH = 18;
const cardX = x - cardW / 2;
const cardY = y - r - cardH - 10;
const accent =
tool.state === 'error'
? COLORS.error
: tool.state === 'complete'
? COLORS.complete
: COLORS.tool_calling;
ctx.beginPath();
ctx.roundRect(cardX, cardY, cardW, cardH, 4);
ctx.fillStyle = tool.state === 'running' ? 'rgba(10, 15, 30, 0.85)' : 'rgba(10, 15, 30, 0.78)';
ctx.fill();
ctx.strokeStyle = hexWithAlpha(accent, 0.7);
ctx.lineWidth = 1;
ctx.stroke();
const indicatorX = cardX + 10;
const indicatorY = cardY + cardH / 2;
if (tool.state === 'running') {
ctx.beginPath();
ctx.arc(indicatorX, indicatorY, 4.5, time * 3, time * 3 + Math.PI * 1.2);
ctx.strokeStyle = accent;
ctx.lineWidth = 1.4;
ctx.stroke();
} else {
ctx.beginPath();
ctx.arc(indicatorX, indicatorY, 2.5, 0, Math.PI * 2);
ctx.fillStyle = accent;
ctx.fill();
}
ctx.textAlign = 'left';
ctx.textBaseline = 'middle';
ctx.fillStyle = accent;
ctx.fillText(truncated, indicatorX + 8, indicatorY);
ctx.restore();
}
function drawBreathing(
ctx: CanvasRenderingContext2D,
x: number,
y: number,
r: number,
state: string,
time: number,
spawnStatus?: GraphNode['spawnStatus']
): void {
// Spawning: bright animated double ring + radial glow
if (spawnStatus === 'spawning') {
const ringR = r + AGENT_DRAW.orbitParticleOffset;
const rotation = time * ANIM.orbitSpeed * 2;
// Outer glow pulse
const glowAlpha = 0.15 + 0.1 * Math.sin(time * 3);
const grad = ctx.createRadialGradient(x, y, r, x, y, ringR + 15);
grad.addColorStop(0, hexWithAlpha(COLORS.holoBase, glowAlpha));
grad.addColorStop(1, hexWithAlpha(COLORS.holoBase, 0));
ctx.fillStyle = grad;
ctx.beginPath();
ctx.arc(x, y, ringR + 15, 0, Math.PI * 2);
ctx.fill();
// Primary spinning arc
ctx.save();
ctx.beginPath();
ctx.arc(x, y, ringR, rotation, rotation + Math.PI * 1.2);
ctx.strokeStyle = hexWithAlpha(COLORS.holoBase, 0.7);
ctx.lineWidth = 2.5;
ctx.setLineDash([8, 5]);
ctx.stroke();
// Secondary counter-rotating arc
ctx.beginPath();
ctx.arc(x, y, ringR + 5, -rotation * 0.7, -rotation * 0.7 + Math.PI * 0.6);
ctx.strokeStyle = hexWithAlpha(COLORS.holoBase, 0.3);
ctx.lineWidth = 1;
ctx.stroke();
ctx.setLineDash([]);
ctx.restore();
return;
}
// Waiting: pulsing glow + hex outline + "waiting" label
if (spawnStatus === 'waiting') {
const pulse = 0.15 + 0.15 * Math.sin(time * AGENT_DRAW.waitingBreatheSpeed);
// Soft glow
const grad = ctx.createRadialGradient(x, y, r * 0.5, x, y, r + 10);
grad.addColorStop(0, hexWithAlpha(COLORS.waiting, pulse * 0.5));
grad.addColorStop(1, hexWithAlpha(COLORS.waiting, 0));
ctx.fillStyle = grad;
ctx.beginPath();
ctx.arc(x, y, r + 10, 0, Math.PI * 2);
ctx.fill();
// Pulsing hex outline
drawHexagon(ctx, x, y, r + AGENT_DRAW.outerRingOffset);
ctx.strokeStyle = hexWithAlpha(COLORS.waiting, pulse);
ctx.lineWidth = 1.5;
ctx.stroke();
return;
}
const isActive = state === 'active' || state === 'thinking' || state === 'tool_calling';
const speed = isActive ? ANIM.breathe.activeSpeed : ANIM.breathe.idleSpeed;
const amp = isActive ? ANIM.breathe.activeAmp : ANIM.breathe.idleAmp;
const breathe = 1 + amp * Math.sin(time * speed);
if (isActive) {
// Orbiting particles for active agents
const orbitR = r + AGENT_DRAW.orbitParticleOffset;
const count = 4;
for (let i = 0; i < count; i++) {
const angle = time * ANIM.orbitSpeed + (Math.PI * 2 * i) / count;
const px = x + orbitR * breathe * Math.cos(angle);
const py = y + orbitR * breathe * Math.sin(angle);
ctx.fillStyle = COLORS.holoBright + '80';
ctx.beginPath();
ctx.arc(px, py, AGENT_DRAW.orbitParticleSize, 0, Math.PI * 2);
ctx.fill();
}
} else {
// Subtle pulsing glow ring for idle agents
const pulseAlpha = 0.04 + 0.04 * Math.sin(time * speed);
ctx.beginPath();
ctx.arc(x, y, r + 2, 0, Math.PI * 2);
ctx.strokeStyle = COLORS.holoBase + alphaHex(pulseAlpha);
ctx.lineWidth = 1;
ctx.stroke();
}
}
// ─── Avatar image cache with LRU eviction ───────────────────────────────────
const AVATAR_CACHE_MAX = 100;
const avatarCache = new Map<string, HTMLImageElement>();
const avatarLoading = new Set<string>();
function getAvatarImage(url: string): HTMLImageElement | null {
const cached = avatarCache.get(url);
if (cached) {
// Move to end (most recently used)
avatarCache.delete(url);
avatarCache.set(url, cached);
return cached;
}
if (avatarLoading.has(url)) return null;
avatarLoading.add(url);
const img = new Image();
img.crossOrigin = 'anonymous';
img.onload = () => {
// Evict oldest entry if over limit
if (avatarCache.size >= AVATAR_CACHE_MAX) {
const first = avatarCache.keys().next().value;
if (first != null) avatarCache.delete(first);
}
avatarCache.set(url, img);
avatarLoading.delete(url);
};
img.onerror = () => {
avatarLoading.delete(url);
};
img.src = url;
return null;
}
function drawAvatar(
ctx: CanvasRenderingContext2D,
x: number,
y: number,
r: number,
name: string,
color: string,
isLead: boolean,
avatarUrl?: string
): void {
const avatarR = r * 0.6;
// Try to draw avatar image
if (avatarUrl) {
const img = getAvatarImage(avatarUrl);
if (img) {
ctx.save();
// Clip to circle inside hexagon
ctx.beginPath();
ctx.arc(x, y, avatarR, 0, Math.PI * 2);
ctx.clip();
ctx.drawImage(img, x - avatarR, y - avatarR, avatarR * 2, avatarR * 2);
ctx.restore();
return;
}
}
// Fallback: first letter
const letter = name.charAt(0).toUpperCase();
const fontSize = isLead ? Math.round(r * 0.6) : Math.round(r * 0.7);
ctx.font = `bold ${fontSize}px sans-serif`;
ctx.textAlign = 'center';
ctx.textBaseline = 'middle';
ctx.fillStyle = hexWithAlpha(color, 0.9);
ctx.fillText(letter, x, y + 1);
}
function drawLabel(
ctx: CanvasRenderingContext2D,
x: number,
y: number,
r: number,
label: string,
color: string,
runtimeLabel?: string,
launchStatusLabel?: string,
launchVisualState?: GraphNode['launchVisualState']
): void {
const labelY = y + r + AGENT_DRAW.labelYOffset;
ctx.font = '9px monospace';
ctx.textAlign = 'center';
ctx.textBaseline = 'top';
ctx.fillStyle = color;
ctx.fillText(label, x, labelY);
const trimmedRuntimeLabel = runtimeLabel?.trim();
const trimmedLaunchStatusLabel = launchStatusLabel?.trim();
if (!trimmedRuntimeLabel && !trimmedLaunchStatusLabel) {
return;
}
let nextLineY = labelY + 10;
if (trimmedRuntimeLabel) {
ctx.font = '8px monospace';
ctx.fillStyle = hexWithAlpha(ensureHex(color), 0.72);
ctx.fillText(truncateSubLabel(ctx, trimmedRuntimeLabel, r), x, nextLineY);
nextLineY += 10;
}
if (trimmedLaunchStatusLabel) {
ctx.font = '7px monospace';
ctx.fillStyle = getLaunchStatusColor(launchVisualState);
ctx.fillText(truncateSubLabel(ctx, trimmedLaunchStatusLabel, r), x, nextLineY);
}
}
function truncateSubLabel(ctx: CanvasRenderingContext2D, label: string, r: number): string {
const maxWidth = Math.max(132, r * AGENT_DRAW.labelWidthMultiplier * 2);
if (ctx.measureText(label).width <= maxWidth) return label;
let out = label;
while (out.length > 1 && ctx.measureText(`${out}`).width > maxWidth) {
out = out.slice(0, -1);
}
return `${out}`;
}
function getLaunchStatusColor(visualState: GraphNode['launchVisualState']): string {
switch (visualState) {
case 'waiting':
return hexWithAlpha('#d4d4d8', 0.8);
case 'spawning':
return hexWithAlpha('#f59e0b', 0.9);
case 'runtime_pending':
return hexWithAlpha('#67e8f9', 0.9);
case 'settling':
return hexWithAlpha('#22c55e', 0.9);
case 'error':
return hexWithAlpha('#ef4444', 0.92);
default:
return hexWithAlpha(COLORS.holoBright, 0.75);
}
}
/**
* Draw context usage ring around lead node.
*/
export function drawContextRing(
ctx: CanvasRenderingContext2D,
x: number,
y: number,
r: number,
usage: number,
time: number
): void {
const ringR = r + CONTEXT_RING.ringOffset;
const startAngle = -Math.PI / 2;
const endAngle = startAngle + Math.PI * 2 * Math.min(1, usage);
// Background ring
ctx.beginPath();
ctx.arc(x, y, ringR, 0, Math.PI * 2);
ctx.strokeStyle = hexWithAlpha(COLORS.holoBright, 0.08);
ctx.lineWidth = CONTEXT_RING.ringWidth;
ctx.stroke();
// Usage arc
let ringColor: string = COLORS.complete;
if (usage > CONTEXT_RING.criticalThreshold) {
ringColor = COLORS.error;
} else if (usage > CONTEXT_RING.warningThreshold) {
ringColor = COLORS.waiting;
}
// Pulsing glow for high usage
if (usage > CONTEXT_RING.warningThreshold) {
const pulse = 0.5 + 0.5 * Math.sin(time * 3);
ctx.beginPath();
ctx.arc(x, y, ringR, startAngle, endAngle);
ctx.strokeStyle = ringColor + alphaHex(0.3 * pulse);
ctx.lineWidth = CONTEXT_RING.ringWidth + CONTEXT_RING.glowPadding;
ctx.stroke();
}
ctx.beginPath();
ctx.arc(x, y, ringR, startAngle, endAngle);
ctx.strokeStyle = ringColor;
ctx.lineWidth = CONTEXT_RING.ringWidth;
ctx.stroke();
// Percentage label — always show for lead
ctx.font = '7px monospace';
ctx.textAlign = 'center';
ctx.fillStyle = ringColor;
ctx.fillText(`${Math.round(usage * 100)}% context`, x, y - r - CONTEXT_RING.percentYOffset);
}
function drawSelectionRing(
ctx: CanvasRenderingContext2D,
x: number,
y: number,
r: number,
color: string
): void {
drawHexagon(ctx, x, y, r + 4);
ctx.strokeStyle = hexWithAlpha(color, 0.67);
ctx.lineWidth = 2;
ctx.setLineDash([4, 4]);
ctx.stroke();
ctx.setLineDash([]);
}