General.Web/wwwroot/lib/codemirror-5.31.0/src/model/selection.js

这里只显示每个文件的开头 60 行。登录后可以解锁完整代码。

微信扫码关注公众号，代码整理好后第一时间通知你。

import { cmp, copyPos, equalCursorPos, maxPos, minPos } from "../line/pos"
import { indexOf } from "../util/misc"

// Selection objects are immutable. A new one is created every time
// the selection changes. A selection is one or more non-overlapping
// (and non-touching) ranges, sorted, and an integer that indicates
// which one is the primary selection (the one that's scrolled into
// view, that getCursor returns, etc).
export class Selection {
  constructor(ranges, primIndex) {
    this.ranges = ranges
    this.primIndex = primIndex
  }

  primary() { return this.ranges[this.primIndex] }

  equals(other) {
    if (other == this) return true
    if (other.primIndex != this.primIndex || other.ranges.length != this.ranges.length) return false
    for (let i = 0; i < this.ranges.length; i++) {
      let here = this.ranges[i], there = other.ranges[i]
      if (!equalCursorPos(here.anchor, there.anchor) || !equalCursorPos(here.head, there.head)) return false
    }
    return true
  }

  deepCopy() {
    let out = []
    for (let i = 0; i < this.ranges.length; i++)
      out[i] = new Range(copyPos(this.ranges[i].anchor), copyPos(this.ranges[i].head))
    return new Selection(out, this.primIndex)
  }

  somethingSelected() {
    for (let i = 0; i < this.ranges.length; i++)
      if (!this.ranges[i].empty()) return true
    return false
  }

  contains(pos, end) {
    if (!end) end = pos
    for (let i = 0; i < this.ranges.length; i++) {
      let range = this.ranges[i]
      if (cmp(end, range.from()) >= 0 && cmp(pos, range.to()) <= 0)
        return i
    }
    return -1
  }
}

export class Range {
  constructor(anchor, head) {
    this.anchor = anchor; this.head = head
  }

  from() { return minPos(this.anchor, this.head) }
  to() { return maxPos(this.anchor, this.head) }
  empty() { return this.head.line == this.anchor.line && this.head.ch == this.anchor.ch }
}