Squash Odysseus development history

2026-10-16 11:52:25 +02:00 · 2026-09-11 06:04:19 +00:00
parent e5c99a5eee
commit 6ee6502010
2050 changed files with 538359 additions and 57745 deletions
@@ -0,0 +1,253 @@
+/** Rulers, grid, and document-space guides. These are viewport overlays only. */
+import { state } from './state.js';
+
+export const RULER_SIZE = 18;
+
+export function chooseRulerStep(zoom, minimumPixels = 48) {
+  const safeZoom = Math.max(0.0001, Number(zoom) || 1);
+  const target = minimumPixels / safeZoom;
+  const magnitude = 10 ** Math.floor(Math.log10(Math.max(1, target)));
+  for (const factor of [1, 2, 5, 10]) {
+    const step = magnitude * factor;
+    if (step >= target) return step;
+  }
+  return magnitude * 10;
+}
+
+export function pointerToDocument(clientX, clientY, canvasRect, width, height) {
+  const scaleX = canvasRect.width / Math.max(1, width);
+  const scaleY = canvasRect.height / Math.max(1, height);
+  return {
+    x: (clientX - canvasRect.left) / Math.max(scaleX, 0.0001),
+    y: (clientY - canvasRect.top) / Math.max(scaleY, 0.0001),
+  };
+}
+
+function normalizedGuides() {
+  if (!state.guides || typeof state.guides !== 'object') state.guides = { vertical: [], horizontal: [] };
+  state.guides.vertical = Array.isArray(state.guides.vertical) ? state.guides.vertical : [];
+  state.guides.horizontal = Array.isArray(state.guides.horizontal) ? state.guides.horizontal : [];
+  return state.guides;
+}
+
+export function createPrecisionGuides({ canvasArea, composite, saveState, schedulePersist }) {
+  const corner = document.createElement('div');
+  corner.className = 'ge-ruler-corner';
+  const horizontal = document.createElement('canvas');
+  horizontal.className = 'ge-ruler ge-ruler-horizontal';
+  horizontal.title = 'Drag down to add a horizontal guide';
+  const vertical = document.createElement('canvas');
+  vertical.className = 'ge-ruler ge-ruler-vertical';
+  vertical.title = 'Drag right to add a vertical guide';
+  canvasArea.append(corner, horizontal, vertical);
+
+  let drag = null;
+  let frame = null;
+
+  function themeColors() {
+    const styles = getComputedStyle(state.container || canvasArea);
+    return {
+      background: styles.getPropertyValue('--panel').trim() || '#111',
+      foreground: styles.getPropertyValue('--fg').trim() || '#ddd',
+      border: styles.getPropertyValue('--border').trim() || '#333',
+    };
+  }
+
+  function prepareRuler(canvas) {
+    const rect = canvas.getBoundingClientRect();
+    const ratio = Math.max(1, window.devicePixelRatio || 1);
+    const width = Math.max(1, Math.round(rect.width * ratio));
+    const height = Math.max(1, Math.round(rect.height * ratio));
+    if (canvas.width !== width) canvas.width = width;
+    if (canvas.height !== height) canvas.height = height;
+    const ctx = canvas.getContext('2d');
+    ctx.setTransform(ratio, 0, 0, ratio, 0, 0);
+    return { ctx, rect };
+  }
+
+  function drawRuler(canvas, orientation) {
+    if (!state.rulersVisible || !state.mainCanvas) return;
+    const { ctx, rect } = prepareRuler(canvas);
+    const areaRect = canvasArea.getBoundingClientRect();
+    const imageRect = state.mainCanvas.getBoundingClientRect();
+    const colors = themeColors();
+    ctx.clearRect(0, 0, rect.width, rect.height);
+    ctx.fillStyle = colors.background;
+    ctx.fillRect(0, 0, rect.width, rect.height);
+    ctx.strokeStyle = colors.border;
+    ctx.beginPath();
+    if (orientation === 'horizontal') {
+      ctx.moveTo(0, rect.height - 0.5); ctx.lineTo(rect.width, rect.height - 0.5);
+    } else {
+      ctx.moveTo(rect.width - 0.5, 0); ctx.lineTo(rect.width - 0.5, rect.height);
+    }
+    ctx.stroke();
+
+    const scale = orientation === 'horizontal'
+      ? imageRect.width / Math.max(1, state.imgWidth)
+      : imageRect.height / Math.max(1, state.imgHeight);
+    const origin = orientation === 'horizontal'
+      ? imageRect.left - areaRect.left - RULER_SIZE
+      : imageRect.top - areaRect.top - RULER_SIZE;
+    const limit = orientation === 'horizontal' ? state.imgWidth : state.imgHeight;
+    const major = chooseRulerStep(scale);
+    const minor = major / 5;
+    ctx.strokeStyle = colors.foreground;
+    ctx.fillStyle = colors.foreground;
+    ctx.globalAlpha = 0.62;
+    ctx.lineWidth = 1;
+    ctx.font = '8px ui-monospace, monospace';
+    ctx.textBaseline = 'top';
+    for (let value = 0; value <= limit + 0.001; value += minor) {
+      const pixel = origin + value * scale;
+      const rulerLimit = orientation === 'horizontal' ? rect.width : rect.height;
+      if (pixel < -2 || pixel > rulerLimit + 2) continue;
+      const isMajor = Math.round(value / minor) % 5 === 0;
+      if (orientation === 'horizontal') {
+        ctx.beginPath();
+        ctx.moveTo(Math.round(pixel) + 0.5, rect.height);
+        ctx.lineTo(Math.round(pixel) + 0.5, rect.height - (isMajor ? 9 : 4));
+        ctx.stroke();
+        if (isMajor) ctx.fillText(String(Math.round(value)), pixel + 2, 1);
+      } else {
+        ctx.beginPath();
+        ctx.moveTo(rect.width, Math.round(pixel) + 0.5);
+        ctx.lineTo(rect.width - (isMajor ? 9 : 4), Math.round(pixel) + 0.5);
+        ctx.stroke();
+        if (isMajor) {
+          ctx.save();
+          ctx.translate(1, pixel - 2);
+          ctx.rotate(-Math.PI / 2);
+          ctx.fillText(String(Math.round(value)), 0, 0);
+          ctx.restore();
+        }
+      }
+    }
+    ctx.globalAlpha = 1;
+  }
+
+  function redrawRulers() {
+    if (frame) cancelAnimationFrame(frame);
+    frame = requestAnimationFrame(() => {
+      frame = null;
+      canvasArea.classList.toggle('ge-rulers-visible', !!state.rulersVisible);
+      corner.hidden = !state.rulersVisible;
+      horizontal.hidden = !state.rulersVisible;
+      vertical.hidden = !state.rulersVisible;
+      if (state.rulersVisible) {
+        drawRuler(horizontal, 'horizontal');
+        drawRuler(vertical, 'vertical');
+      }
+    });
+  }
+
+  function drawDocumentOverlay(ctx) {
+    if (!ctx || !state.imgWidth || !state.imgHeight) return;
+    ctx.save();
+    if (state.gridVisible) {
+      const base = Math.max(2, Number(state.gridSize) || 16);
+      const multiplier = Math.max(1, Math.ceil(5 / Math.max(0.0001, base * state.zoom)));
+      const spacing = base * multiplier;
+      ctx.lineWidth = 1 / state.zoom;
+      for (let x = spacing; x < state.imgWidth; x += spacing) {
+        ctx.beginPath(); ctx.moveTo(x, 0); ctx.lineTo(x, state.imgHeight);
+        ctx.strokeStyle = Math.round(x / spacing) % 4 === 0
+          ? 'rgba(110, 180, 220, 0.42)' : 'rgba(110, 180, 220, 0.22)';
+        ctx.stroke();
+      }
+      for (let y = spacing; y < state.imgHeight; y += spacing) {
+        ctx.beginPath(); ctx.moveTo(0, y); ctx.lineTo(state.imgWidth, y);
+        ctx.strokeStyle = Math.round(y / spacing) % 4 === 0
+          ? 'rgba(110, 180, 220, 0.42)' : 'rgba(110, 180, 220, 0.22)';
+        ctx.stroke();
+      }
+    }
+    const guides = normalizedGuides();
+    ctx.strokeStyle = 'rgba(78, 190, 255, 0.92)';
+    ctx.lineWidth = 1 / state.zoom;
+    ctx.setLineDash([]);
+    for (const x of guides.vertical) {
+      ctx.beginPath(); ctx.moveTo(x, 0); ctx.lineTo(x, state.imgHeight); ctx.stroke();
+    }
+    for (const y of guides.horizontal) {
+      ctx.beginPath(); ctx.moveTo(0, y); ctx.lineTo(state.imgWidth, y); ctx.stroke();
+    }
+    if (drag?.moved && Number.isFinite(drag.position)) {
+      ctx.strokeStyle = 'rgba(120, 215, 255, 1)';
+      if (drag.orientation === 'vertical') {
+        ctx.beginPath(); ctx.moveTo(drag.position, 0); ctx.lineTo(drag.position, state.imgHeight); ctx.stroke();
+      } else {
+        ctx.beginPath(); ctx.moveTo(0, drag.position); ctx.lineTo(state.imgWidth, drag.position); ctx.stroke();
+      }
+    }
+    ctx.restore();
+  }
+
+  function updateDrag(event) {
+    if (!drag || !state.mainCanvas) return;
+    const point = pointerToDocument(
+      event.clientX, event.clientY,
+      state.mainCanvas.getBoundingClientRect(),
+      state.imgWidth, state.imgHeight,
+    );
+    const delta = Math.hypot(event.clientX - drag.startX, event.clientY - drag.startY);
+    drag.moved = drag.moved || delta > 3;
+    drag.position = drag.orientation === 'vertical'
+      ? Math.max(0, Math.min(state.imgWidth, Math.round(point.x)))
+      : Math.max(0, Math.min(state.imgHeight, Math.round(point.y)));
+    if (drag.moved) composite();
+  }
+
+  function beginGuide(event, orientation) {
+    if (event.button != null && event.button !== 0) return;
+    event.preventDefault();
+    event.stopPropagation();
+    drag = { orientation, startX: event.clientX, startY: event.clientY, moved: false, position: 0 };
+    const move = next => updateDrag(next);
+    const cancel = () => finish(false);
+    const finish = (commit, next) => {
+      if (next) updateDrag(next);
+      if (commit && drag?.moved) {
+        const values = normalizedGuides()[drag.orientation];
+        if (!values.some(value => Math.abs(value - drag.position) < 0.5)) {
+          saveState?.('Add guide');
+          values.push(drag.position);
+          values.sort((a, b) => a - b);
+          schedulePersist?.();
+        }
+      }
+      drag = null;
+      window.removeEventListener('pointermove', move);
+      window.removeEventListener('pointerup', end);
+      window.removeEventListener('pointercancel', cancel);
+      composite();
+      redrawRulers();
+    };
+    const end = next => finish(true, next);
+    window.addEventListener('pointermove', move);
+    window.addEventListener('pointerup', end);
+    window.addEventListener('pointercancel', cancel);
+  }
+
+  horizontal.addEventListener('pointerdown', event => beginGuide(event, 'horizontal'));
+  vertical.addEventListener('pointerdown', event => beginGuide(event, 'vertical'));
+  canvasArea.addEventListener('scroll', redrawRulers, { passive: true });
+  const observer = window.ResizeObserver ? new ResizeObserver(redrawRulers) : null;
+  observer?.observe(canvasArea);
+  redrawRulers();
+
+  return {
+    drawDocumentOverlay,
+    redrawRulers,
+    syncVisibility() { redrawRulers(); composite(); },
+    clearGuides() {
+      const guides = normalizedGuides();
+      if (!guides.vertical.length && !guides.horizontal.length) return;
+      saveState?.('Clear guides');
+      state.guides = { vertical: [], horizontal: [] };
+      schedulePersist?.();
+      composite();
+      redrawRulers();
+    },
+  };
+}