chore: import upstream snapshot with attribution

2026-07-13 13:20:55 +08:00
commit d25d482dc2
13754 changed files with 4996608 additions and 0 deletions
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+/**
+ * Convert OOXML arc specification to SVG path arc command.
+ * Based on PPTXjs shapeArc() implementation.
+ *
+ * @param cx - Center X coordinate
+ * @param cy - Center Y coordinate
+ * @param rx - Horizontal radius
+ * @param ry - Vertical radius
+ * @param startAngle - Start angle in degrees
+ * @param endAngle - End angle in degrees
+ * @param isClose - Whether to close the path with Z
+ * @returns SVG path string for the arc
+ */
+export function shapeArc(
+  cx: number,
+  cy: number,
+  rx: number,
+  ry: number,
+  startAngle: number,
+  endAngle: number,
+  isClose: boolean
+): string {
+  const startRad = (startAngle * Math.PI) / 180
+  const endRad = (endAngle * Math.PI) / 180
+
+  const x1 = cx + rx * Math.cos(startRad)
+  const y1 = cy + ry * Math.sin(startRad)
+  const x2 = cx + rx * Math.cos(endRad)
+  const y2 = cy + ry * Math.sin(endRad)
+
+  // OOXML convention: always sweep clockwise from startAngle to endAngle.
+  // Compute the clockwise sweep in degrees, handling angle wrapping.
+  let sweepDeg = (((endAngle - startAngle) % 360) + 360) % 360
+  if (sweepDeg === 0 && startAngle !== endAngle) sweepDeg = 360
+
+  const largeArc = sweepDeg > 180 ? 1 : 0
+  const sweep = 1 // always clockwise
+
+  let d = `M${x1},${y1} A${rx},${ry} 0 ${largeArc},${sweep} ${x2},${y2}`
+  if (isClose) {
+    d += ' Z'
+  }
+  return d
+}