FM / input

/usr/share/nodejs/codemirror/src/input

Name	Size	Mode	Actions
ContentEditableInput.js	19337	0644	edit dl rm
indent.js	2757	0644	edit dl rm
input.js	5548	0644	edit dl rm
keymap.js	6512	0644	edit dl rm
keynames.js	1014	0644	edit dl rm
movement.js	5090	0644	edit dl rm
TextareaInput.js	13921	0644	edit dl rm

Edit: /usr/share/nodejs/codemirror/src/input/indent.js (2757B)

import { getContextBefore } from "../line/highlight.js"
import { Pos } from "../line/pos.js"
import { getLine } from "../line/utils_line.js"
import { replaceRange } from "../model/changes.js"
import { Range } from "../model/selection.js"
import { replaceOneSelection } from "../model/selection_updates.js"
import { countColumn, Pass, spaceStr } from "../util/misc.js"

// Indent the given line. The how parameter can be "smart",
// "add"/null, "subtract", or "prev". When aggressive is false
// (typically set to true for forced single-line indents), empty
// lines are not indented, and places where the mode returns Pass
// are left alone.
export function indentLine(cm, n, how, aggressive) {
  let doc = cm.doc, state
  if (how == null) how = "add"
  if (how == "smart") {
    // Fall back to "prev" when the mode doesn't have an indentation
    // method.
    if (!doc.mode.indent) how = "prev"
    else state = getContextBefore(cm, n).state
  }

let tabSize = cm.options.tabSize
  let line = getLine(doc, n), curSpace = countColumn(line.text, null, tabSize)
  if (line.stateAfter) line.stateAfter = null
  let curSpaceString = line.text.match(/^\s*/)[0], indentation
  if (!aggressive && !/\S/.test(line.text)) {
    indentation = 0
    how = "not"
  } else if (how == "smart") {
    indentation = doc.mode.indent(state, line.text.slice(curSpaceString.length), line.text)
    if (indentation == Pass || indentation > 150) {
      if (!aggressive) return
      how = "prev"
    }
  }
  if (how == "prev") {
    if (n > doc.first) indentation = countColumn(getLine(doc, n-1).text, null, tabSize)
    else indentation = 0
  } else if (how == "add") {
    indentation = curSpace + cm.options.indentUnit
  } else if (how == "subtract") {
    indentation = curSpace - cm.options.indentUnit
  } else if (typeof how == "number") {
    indentation = curSpace + how
  }
  indentation = Math.max(0, indentation)

let indentString = "", pos = 0
  if (cm.options.indentWithTabs)
    for (let i = Math.floor(indentation / tabSize); i; --i) {pos += tabSize; indentString += "\t"}
  if (pos < indentation) indentString += spaceStr(indentation - pos)

if (indentString != curSpaceString) {
    replaceRange(doc, indentString, Pos(n, 0), Pos(n, curSpaceString.length), "+input")
    line.stateAfter = null
    return true
  } else {
    // Ensure that, if the cursor was in the whitespace at the start
    // of the line, it is moved to the end of that space.
    for (let i = 0; i < doc.sel.ranges.length; i++) {
      let range = doc.sel.ranges[i]
      if (range.head.line == n && range.head.ch < curSpaceString.length) {
        let pos = Pos(n, curSpaceString.length)
        replaceOneSelection(doc, i, new Range(pos, pos))
        break
      }
    }
  }
}

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