PPTist/src/views/Editor/Canvas/utils/alignLines.ts

export interface AlignLine {
  value: number;
  range: [number, number];
}

// 对齐参考线去重，对于相同位置的多条参考线，取长度范围的最小值和最大值，并基于此范围将多条参考线合并为一条
export const uniqAlignLines = (lines: AlignLine[]) => {
  const uniqLines: AlignLine[] = []
  lines.forEach(line => {
    const index = uniqLines.findIndex(_line => _line.value === line.value)
    if(index === -1) uniqLines.push(line)
    else {
      const uniqLine = uniqLines[index]
      const rangeMin = Math.min(uniqLine.range[0], line.range[0])
      const rangeMax = Math.max(uniqLine.range[1], line.range[1])
      const range: [number, number] = [rangeMin, rangeMax]
      const _line = { value: line.value, range }
      uniqLines[index] = _line
    }
  })
  return uniqLines
}