fabric/dist-extensions/aligning_guidelines/util/collect-line.mjs.map

Object model for HTML5 canvas, and SVG-to-canvas parser. Backed by jsdom and node-canvas.

{"version":3,"file":"collect-line.mjs","sources":["../../../extensions/aligning_guidelines/util/collect-line.ts"],"sourcesContent":["import type { FabricObject, TBBox } from 'fabric';\nimport { Point } from 'fabric';\nimport type { HorizontalLine, VerticalLine } from '../typedefs';\nimport { aligningLineConfig } from '../constant';\nimport { getDistance, setPositionDir } from './basic';\n\ntype CollectLineProps = {\n  activeObject: FabricObject;\n  activeObjectRect: TBBox;\n  objectRect: TBBox;\n};\n\nexport function collectLine(props: CollectLineProps) {\n  const aligningLineMargin = aligningLineConfig.margin;\n  const { activeObject, activeObjectRect, objectRect } = props;\n  const list = makeLineByRect(objectRect);\n  const aList = makeLineByRect(activeObjectRect);\n  const margin = aligningLineMargin / (activeObject.canvas?.getZoom() ?? 1);\n  const opts = { target: activeObject, list, aList, margin };\n  const vLines = collectVerticalLine(opts);\n  const hLines = collectHorizontalLine(opts);\n\n  return { vLines, hLines };\n}\n\ntype CollectItemLineProps = {\n  target: FabricObject;\n  list: LineProps[];\n  aList: LineProps[];\n  margin: number;\n};\nfunction collectVerticalLine(props: CollectItemLineProps) {\n  const { target, list, aList, margin } = props;\n\n  const arr = aList.map((x) => getDistanceLine(x, list, 'x'));\n  const min = Math.min(...arr.map((x) => x.dis));\n  if (min > margin) return [];\n  const lines: VerticalLine[] = [];\n  const width = aList[0].x2 - aList[0].x;\n  const height = aList[0].y2 - aList[0].y;\n  let b = false;\n  for (let i = 0; i < arr.length; i++) {\n    const item = arr[i];\n    if (min == item.dis) {\n      const line = list[item.index];\n      const aLine = aList[item.index];\n      const x = line.x;\n      const y = aLine.y;\n\n      const y1 = Math.min(line.y, line.y2, y, aLine.y2);\n      const y2 = Math.max(line.y, line.y2, y, aLine.y2);\n      // 参考线可画多条\n      lines.push({ x, y1, y2 });\n      if (b) continue;\n      b = true;\n      // 对齐只进行一次\n      setPos({\n        target,\n        x,\n        y,\n        centerX: i - 1,\n        centerY: item.index - 1,\n        width,\n        height,\n        dir: 'x',\n      });\n      const dis = min * item.dir;\n      aList.forEach((x) => (x.x -= dis));\n    }\n  }\n  return lines;\n}\n\nfunction collectHorizontalLine(props: CollectItemLineProps) {\n  const { target, list, aList, margin } = props;\n\n  const arr = aList.map((x) => getDistanceLine(x, list, 'y'));\n  const min = Math.min(...arr.map((x) => x.dis));\n  if (min > margin) return [];\n  const lines: HorizontalLine[] = [];\n  const width = aList[0].x2 - aList[0].x;\n  const height = aList[0].y2 - aList[0].y;\n  let b = false;\n  for (let i = 0; i < arr.length; i++) {\n    const item = arr[i];\n    if (min == item.dis) {\n      const line = list[item.index];\n      const aLine = aList[item.index];\n      const y = line.y;\n      const x = aLine.x;\n\n      const x1 = Math.min(line.x, line.x2, x, aLine.x2);\n      const x2 = Math.max(line.x, line.x2, x, aLine.x2);\n      // 参考线可画多条\n      lines.push({ y, x1, x2 });\n      if (b) continue;\n      b = true;\n      // 对齐只进行一次\n      setPos({\n        target,\n        x,\n        y,\n        centerX: item.index - 1,\n        centerY: i - 1,\n        width,\n        height,\n        dir: 'y',\n      });\n      const dis = min * item.dir;\n      aList.forEach((x) => (x.y -= dis));\n    }\n  }\n  return lines;\n}\n\ntype LineProps = {\n  x: number;\n  y: number;\n  x2: number;\n  y2: number;\n};\nfunction getDistanceLine(\n  target: LineProps,\n  list: LineProps[],\n  type: 'x' | 'y',\n) {\n  let dis = Infinity;\n  let index = -1;\n  /** 1正值 -1负值 */\n  let dir = 1;\n  for (let i = 0; i < list.length; i++) {\n    const v = getDistance(target[type], list[i][type]);\n    if (dis > v) {\n      index = i;\n      dis = v;\n      dir = target[type] > list[i][type] ? 1 : -1;\n    }\n  }\n  return { dis, index, dir 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