Function gutterEvent

external/.scrollLibs.js:10387–10424

(cm, e, type, prevent)

  // Determines whether an event happened in the gutter, and fires the
  // handlers for the corresponding event.
  function gutterEvent(cm, e, type, prevent) {
    var mX, mY
    if (e.touches) {
      mX = e.touches[0].clientX
      mY = e.touches[0].clientY
    } else {
      try {
        mX = e.clientX
        mY = e.clientY
      } catch (e) {
        return false
      }
    }
    if (mX >= Math.floor(cm.display.gutters.getBoundingClientRect().right)) {
      return false
    }
    if (prevent) {
      e_preventDefault(e)
    }

    var display = cm.display
    var lineBox = display.lineDiv.getBoundingClientRect()

    if (mY > lineBox.bottom || !hasHandler(cm, type)) {
      return e_defaultPrevented(e)
    }
    mY -= lineBox.top - display.viewOffset

    for (var i = 0; i < cm.options.gutters.length; ++i) {
      var g = display.gutters.childNodes[i]
      if (g && g.getBoundingClientRect().right >= mX) {
        var line = lineAtHeight(cm.doc, mY)
        var gutter = cm.options.gutters[i]
        signal(cm, type, cm, line, gutter, e)
        return e_defaultPrevented(e)
      }
    }
  }

  function clickInGutter(cm, e) {
    return gutterEvent(cm, e, "gutterClick", true)