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Current File : /proc/self/root/usr/share/nodejs/codemirror/src/model/Doc.js
import CodeMirror from "../edit/CodeMirror.js"
import { docMethodOp } from "../display/operations.js"
import { Line } from "../line/line_data.js"
import { clipPos, clipPosArray, Pos } from "../line/pos.js"
import { visualLine } from "../line/spans.js"
import { getBetween, getLine, getLines, isLine, lineNo } from "../line/utils_line.js"
import { classTest } from "../util/dom.js"
import { splitLinesAuto } from "../util/feature_detection.js"
import { createObj, map, isEmpty, sel_dontScroll } from "../util/misc.js"
import { ensureCursorVisible, scrollToCoords } from "../display/scrolling.js"

import { changeLine, makeChange, makeChangeFromHistory, replaceRange } from "./changes.js"
import { computeReplacedSel } from "./change_measurement.js"
import { BranchChunk, LeafChunk } from "./chunk.js"
import { directionChanged, linkedDocs, updateDoc } from "./document_data.js"
import { copyHistoryArray, History } from "./history.js"
import { addLineWidget } from "./line_widget.js"
import { copySharedMarkers, detachSharedMarkers, findSharedMarkers, markText } from "./mark_text.js"
import { normalizeSelection, Range, simpleSelection } from "./selection.js"
import { extendSelection, extendSelections, setSelection, setSelectionReplaceHistory, setSimpleSelection } from "./selection_updates.js"

let nextDocId = 0
let Doc = function(text, mode, firstLine, lineSep, direction) {
  if (!(this instanceof Doc)) return new Doc(text, mode, firstLine, lineSep, direction)
  if (firstLine == null) firstLine = 0

  BranchChunk.call(this, [new LeafChunk([new Line("", null)])])
  this.first = firstLine
  this.scrollTop = this.scrollLeft = 0
  this.cantEdit = false
  this.cleanGeneration = 1
  this.modeFrontier = this.highlightFrontier = firstLine
  let start = Pos(firstLine, 0)
  this.sel = simpleSelection(start)
  this.history = new History(null)
  this.id = ++nextDocId
  this.modeOption = mode
  this.lineSep = lineSep
  this.direction = (direction == "rtl") ? "rtl" : "ltr"
  this.extend = false

  if (typeof text == "string") text = this.splitLines(text)
  updateDoc(this, {from: start, to: start, text: text})
  setSelection(this, simpleSelection(start), sel_dontScroll)
}

Doc.prototype = createObj(BranchChunk.prototype, {
  constructor: Doc,
  // Iterate over the document. Supports two forms -- with only one
  // argument, it calls that for each line in the document. With
  // three, it iterates over the range given by the first two (with
  // the second being non-inclusive).
  iter: function(from, to, op) {
    if (op) this.iterN(from - this.first, to - from, op)
    else this.iterN(this.first, this.first + this.size, from)
  },

  // Non-public interface for adding and removing lines.
  insert: function(at, lines) {
    let height = 0
    for (let i = 0; i < lines.length; ++i) height += lines[i].height
    this.insertInner(at - this.first, lines, height)
  },
  remove: function(at, n) { this.removeInner(at - this.first, n) },

  // From here, the methods are part of the public interface. Most
  // are also available from CodeMirror (editor) instances.

  getValue: function(lineSep) {
    let lines = getLines(this, this.first, this.first + this.size)
    if (lineSep === false) return lines
    return lines.join(lineSep || this.lineSeparator())
  },
  setValue: docMethodOp(function(code) {
    let top = Pos(this.first, 0), last = this.first + this.size - 1
    makeChange(this, {from: top, to: Pos(last, getLine(this, last).text.length),
                      text: this.splitLines(code), origin: "setValue", full: true}, true)
    if (this.cm) scrollToCoords(this.cm, 0, 0)
    setSelection(this, simpleSelection(top), sel_dontScroll)
  }),
  replaceRange: function(code, from, to, origin) {
    from = clipPos(this, from)
    to = to ? clipPos(this, to) : from
    replaceRange(this, code, from, to, origin)
  },
  getRange: function(from, to, lineSep) {
    let lines = getBetween(this, clipPos(this, from), clipPos(this, to))
    if (lineSep === false) return lines
    return lines.join(lineSep || this.lineSeparator())
  },

  getLine: function(line) {let l = this.getLineHandle(line); return l && l.text},

  getLineHandle: function(line) {if (isLine(this, line)) return getLine(this, line)},
  getLineNumber: function(line) {return lineNo(line)},

  getLineHandleVisualStart: function(line) {
    if (typeof line == "number") line = getLine(this, line)
    return visualLine(line)
  },

  lineCount: function() {return this.size},
  firstLine: function() {return this.first},
  lastLine: function() {return this.first + this.size - 1},

  clipPos: function(pos) {return clipPos(this, pos)},

  getCursor: function(start) {
    let range = this.sel.primary(), pos
    if (start == null || start == "head") pos = range.head
    else if (start == "anchor") pos = range.anchor
    else if (start == "end" || start == "to" || start === false) pos = range.to()
    else pos = range.from()
    return pos
  },
  listSelections: function() { return this.sel.ranges },
  somethingSelected: function() {return this.sel.somethingSelected()},

  setCursor: docMethodOp(function(line, ch, options) {
    setSimpleSelection(this, clipPos(this, typeof line == "number" ? Pos(line, ch || 0) : line), null, options)
  }),
  setSelection: docMethodOp(function(anchor, head, options) {
    setSimpleSelection(this, clipPos(this, anchor), clipPos(this, head || anchor), options)
  }),
  extendSelection: docMethodOp(function(head, other, options) {
    extendSelection(this, clipPos(this, head), other && clipPos(this, other), options)
  }),
  extendSelections: docMethodOp(function(heads, options) {
    extendSelections(this, clipPosArray(this, heads), options)
  }),
  extendSelectionsBy: docMethodOp(function(f, options) {
    let heads = map(this.sel.ranges, f)
    extendSelections(this, clipPosArray(this, heads), options)
  }),
  setSelections: docMethodOp(function(ranges, primary, options) {
    if (!ranges.length) return
    let out = []
    for (let i = 0; i < ranges.length; i++)
      out[i] = new Range(clipPos(this, ranges[i].anchor),
                         clipPos(this, ranges[i].head))
    if (primary == null) primary = Math.min(ranges.length - 1, this.sel.primIndex)
    setSelection(this, normalizeSelection(this.cm, out, primary), options)
  }),
  addSelection: docMethodOp(function(anchor, head, options) {
    let ranges = this.sel.ranges.slice(0)
    ranges.push(new Range(clipPos(this, anchor), clipPos(this, head || anchor)))
    setSelection(this, normalizeSelection(this.cm, ranges, ranges.length - 1), options)
  }),

  getSelection: function(lineSep) {
    let ranges = this.sel.ranges, lines
    for (let i = 0; i < ranges.length; i++) {
      let sel = getBetween(this, ranges[i].from(), ranges[i].to())
      lines = lines ? lines.concat(sel) : sel
    }
    if (lineSep === false) return lines
    else return lines.join(lineSep || this.lineSeparator())
  },
  getSelections: function(lineSep) {
    let parts = [], ranges = this.sel.ranges
    for (let i = 0; i < ranges.length; i++) {
      let sel = getBetween(this, ranges[i].from(), ranges[i].to())
      if (lineSep !== false) sel = sel.join(lineSep || this.lineSeparator())
      parts[i] = sel
    }
    return parts
  },
  replaceSelection: function(code, collapse, origin) {
    let dup = []
    for (let i = 0; i < this.sel.ranges.length; i++)
      dup[i] = code
    this.replaceSelections(dup, collapse, origin || "+input")
  },
  replaceSelections: docMethodOp(function(code, collapse, origin) {
    let changes = [], sel = this.sel
    for (let i = 0; i < sel.ranges.length; i++) {
      let range = sel.ranges[i]
      changes[i] = {from: range.from(), to: range.to(), text: this.splitLines(code[i]), origin: origin}
    }
    let newSel = collapse && collapse != "end" && computeReplacedSel(this, changes, collapse)
    for (let i = changes.length - 1; i >= 0; i--)
      makeChange(this, changes[i])
    if (newSel) setSelectionReplaceHistory(this, newSel)
    else if (this.cm) ensureCursorVisible(this.cm)
  }),
  undo: docMethodOp(function() {makeChangeFromHistory(this, "undo")}),
  redo: docMethodOp(function() {makeChangeFromHistory(this, "redo")}),
  undoSelection: docMethodOp(function() {makeChangeFromHistory(this, "undo", true)}),
  redoSelection: docMethodOp(function() {makeChangeFromHistory(this, "redo", true)}),

  setExtending: function(val) {this.extend = val},
  getExtending: function() {return this.extend},

  historySize: function() {
    let hist = this.history, done = 0, undone = 0
    for (let i = 0; i < hist.done.length; i++) if (!hist.done[i].ranges) ++done
    for (let i = 0; i < hist.undone.length; i++) if (!hist.undone[i].ranges) ++undone
    return {undo: done, redo: undone}
  },
  clearHistory: function() {
    this.history = new History(this.history.maxGeneration)
    linkedDocs(this, doc => doc.history = this.history, true)
  },

  markClean: function() {
    this.cleanGeneration = this.changeGeneration(true)
  },
  changeGeneration: function(forceSplit) {
    if (forceSplit)
      this.history.lastOp = this.history.lastSelOp = this.history.lastOrigin = null
    return this.history.generation
  },
  isClean: function (gen) {
    return this.history.generation == (gen || this.cleanGeneration)
  },

  getHistory: function() {
    return {done: copyHistoryArray(this.history.done),
            undone: copyHistoryArray(this.history.undone)}
  },
  setHistory: function(histData) {
    let hist = this.history = new History(this.history.maxGeneration)
    hist.done = copyHistoryArray(histData.done.slice(0), null, true)
    hist.undone = copyHistoryArray(histData.undone.slice(0), null, true)
  },

  setGutterMarker: docMethodOp(function(line, gutterID, value) {
    return changeLine(this, line, "gutter", line => {
      let markers = line.gutterMarkers || (line.gutterMarkers = {})
      markers[gutterID] = value
      if (!value && isEmpty(markers)) line.gutterMarkers = null
      return true
    })
  }),

  clearGutter: docMethodOp(function(gutterID) {
    this.iter(line => {
      if (line.gutterMarkers && line.gutterMarkers[gutterID]) {
        changeLine(this, line, "gutter", () => {
          line.gutterMarkers[gutterID] = null
          if (isEmpty(line.gutterMarkers)) line.gutterMarkers = null
          return true
        })
      }
    })
  }),

  lineInfo: function(line) {
    let n
    if (typeof line == "number") {
      if (!isLine(this, line)) return null
      n = line
      line = getLine(this, line)
      if (!line) return null
    } else {
      n = lineNo(line)
      if (n == null) return null
    }
    return {line: n, handle: line, text: line.text, gutterMarkers: line.gutterMarkers,
            textClass: line.textClass, bgClass: line.bgClass, wrapClass: line.wrapClass,
            widgets: line.widgets}
  },

  addLineClass: docMethodOp(function(handle, where, cls) {
    return changeLine(this, handle, where == "gutter" ? "gutter" : "class", line => {
      let prop = where == "text" ? "textClass"
               : where == "background" ? "bgClass"
               : where == "gutter" ? "gutterClass" : "wrapClass"
      if (!line[prop]) line[prop] = cls
      else if (classTest(cls).test(line[prop])) return false
      else line[prop] += " " + cls
      return true
    })
  }),
  removeLineClass: docMethodOp(function(handle, where, cls) {
    return changeLine(this, handle, where == "gutter" ? "gutter" : "class", line => {
      let prop = where == "text" ? "textClass"
               : where == "background" ? "bgClass"
               : where == "gutter" ? "gutterClass" : "wrapClass"
      let cur = line[prop]
      if (!cur) return false
      else if (cls == null) line[prop] = null
      else {
        let found = cur.match(classTest(cls))
        if (!found) return false
        let end = found.index + found[0].length
        line[prop] = cur.slice(0, found.index) + (!found.index || end == cur.length ? "" : " ") + cur.slice(end) || null
      }
      return true
    })
  }),

  addLineWidget: docMethodOp(function(handle, node, options) {
    return addLineWidget(this, handle, node, options)
  }),
  removeLineWidget: function(widget) { widget.clear() },

  markText: function(from, to, options) {
    return markText(this, clipPos(this, from), clipPos(this, to), options, options && options.type || "range")
  },
  setBookmark: function(pos, options) {
    let realOpts = {replacedWith: options && (options.nodeType == null ? options.widget : options),
                    insertLeft: options && options.insertLeft,
                    clearWhenEmpty: false, shared: options && options.shared,
                    handleMouseEvents: options && options.handleMouseEvents}
    pos = clipPos(this, pos)
    return markText(this, pos, pos, realOpts, "bookmark")
  },
  findMarksAt: function(pos) {
    pos = clipPos(this, pos)
    let markers = [], spans = getLine(this, pos.line).markedSpans
    if (spans) for (let i = 0; i < spans.length; ++i) {
      let span = spans[i]
      if ((span.from == null || span.from <= pos.ch) &&
          (span.to == null || span.to >= pos.ch))
        markers.push(span.marker.parent || span.marker)
    }
    return markers
  },
  findMarks: function(from, to, filter) {
    from = clipPos(this, from); to = clipPos(this, to)
    let found = [], lineNo = from.line
    this.iter(from.line, to.line + 1, line => {
      let spans = line.markedSpans
      if (spans) for (let i = 0; i < spans.length; i++) {
        let span = spans[i]
        if (!(span.to != null && lineNo == from.line && from.ch >= span.to ||
              span.from == null && lineNo != from.line ||
              span.from != null && lineNo == to.line && span.from >= to.ch) &&
            (!filter || filter(span.marker)))
          found.push(span.marker.parent || span.marker)
      }
      ++lineNo
    })
    return found
  },
  getAllMarks: function() {
    let markers = []
    this.iter(line => {
      let sps = line.markedSpans
      if (sps) for (let i = 0; i < sps.length; ++i)
        if (sps[i].from != null) markers.push(sps[i].marker)
    })
    return markers
  },

  posFromIndex: function(off) {
    let ch, lineNo = this.first, sepSize = this.lineSeparator().length
    this.iter(line => {
      let sz = line.text.length + sepSize
      if (sz > off) { ch = off; return true }
      off -= sz
      ++lineNo
    })
    return clipPos(this, Pos(lineNo, ch))
  },
  indexFromPos: function (coords) {
    coords = clipPos(this, coords)
    let index = coords.ch
    if (coords.line < this.first || coords.ch < 0) return 0
    let sepSize = this.lineSeparator().length
    this.iter(this.first, coords.line, line => { // iter aborts when callback returns a truthy value
      index += line.text.length + sepSize
    })
    return index
  },

  copy: function(copyHistory) {
    let doc = new Doc(getLines(this, this.first, this.first + this.size),
                      this.modeOption, this.first, this.lineSep, this.direction)
    doc.scrollTop = this.scrollTop; doc.scrollLeft = this.scrollLeft
    doc.sel = this.sel
    doc.extend = false
    if (copyHistory) {
      doc.history.undoDepth = this.history.undoDepth
      doc.setHistory(this.getHistory())
    }
    return doc
  },

  linkedDoc: function(options) {
    if (!options) options = {}
    let from = this.first, to = this.first + this.size
    if (options.from != null && options.from > from) from = options.from
    if (options.to != null && options.to < to) to = options.to
    let copy = new Doc(getLines(this, from, to), options.mode || this.modeOption, from, this.lineSep, this.direction)
    if (options.sharedHist) copy.history = this.history
    ;(this.linked || (this.linked = [])).push({doc: copy, sharedHist: options.sharedHist})
    copy.linked = [{doc: this, isParent: true, sharedHist: options.sharedHist}]
    copySharedMarkers(copy, findSharedMarkers(this))
    return copy
  },
  unlinkDoc: function(other) {
    if (other instanceof CodeMirror) other = other.doc
    if (this.linked) for (let i = 0; i < this.linked.length; ++i) {
      let link = this.linked[i]
      if (link.doc != other) continue
      this.linked.splice(i, 1)
      other.unlinkDoc(this)
      detachSharedMarkers(findSharedMarkers(this))
      break
    }
    // If the histories were shared, split them again
    if (other.history == this.history) {
      let splitIds = [other.id]
      linkedDocs(other, doc => splitIds.push(doc.id), true)
      other.history = new History(null)
      other.history.done = copyHistoryArray(this.history.done, splitIds)
      other.history.undone = copyHistoryArray(this.history.undone, splitIds)
    }
  },
  iterLinkedDocs: function(f) {linkedDocs(this, f)},

  getMode: function() {return this.mode},
  getEditor: function() {return this.cm},

  splitLines: function(str) {
    if (this.lineSep) return str.split(this.lineSep)
    return splitLinesAuto(str)
  },
  lineSeparator: function() { return this.lineSep || "\n" },

  setDirection: docMethodOp(function (dir) {
    if (dir != "rtl") dir = "ltr"
    if (dir == this.direction) return
    this.direction = dir
    this.iter(line => line.order = null)
    if (this.cm) directionChanged(this.cm)
  })
})

// Public alias.
Doc.prototype.eachLine = Doc.prototype.iter

export default Doc

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