Function highlightWorker

external/.scrollLibs.js:5765–5821

(cm)

  }

  function highlightWorker(cm) {
    var doc = cm.doc
    if (doc.highlightFrontier >= cm.display.viewTo) {
      return
    }
    var end = +new Date() + cm.options.workTime
    var context = getContextBefore(cm, doc.highlightFrontier)
    var changedLines = []

    doc.iter(context.line, Math.min(doc.first + doc.size, cm.display.viewTo + 500), function (line) {
      if (context.line >= cm.display.viewFrom) {
        // Visible
        var oldStyles = line.styles
        var resetState = line.text.length > cm.options.maxHighlightLength ? copyState(doc.mode, context.state) : null
        var highlighted = highlightLine(cm, line, context, true)
        if (resetState) {
          context.state = resetState
        }
        line.styles = highlighted.styles
        var oldCls = line.styleClasses,
          newCls = highlighted.classes
        if (newCls) {
          line.styleClasses = newCls
        } else if (oldCls) {
          line.styleClasses = null
        }
        var ischange = !oldStyles || oldStyles.length != line.styles.length || (oldCls != newCls && (!oldCls || !newCls || oldCls.bgClass != newCls.bgClass || oldCls.textClass != newCls.textClass))
        for (var i = 0; !ischange && i < oldStyles.length; ++i) {
          ischange = oldStyles[i] != line.styles[i]
        }
        if (ischange) {
          changedLines.push(context.line)
        }
        line.stateAfter = context.save()
        context.nextLine()
      } else {
        if (line.text.length <= cm.options.maxHighlightLength) {
          processLine(cm, line.text, context)
        }
        line.stateAfter = context.line % 5 == 0 ? context.save() : null
        context.nextLine()
      }
      if (+new Date() > end) {
        startWorker(cm, cm.options.workDelay)
        return true
      }
    })
    doc.highlightFrontier = context.line
    doc.modeFrontier = Math.max(doc.modeFrontier, context.line)
    if (changedLines.length) {
      runInOp(cm, function () {
        for (var i = 0; i < changedLines.length; i++) {
          regLineChange(cm, changedLines[i], "text")
        }
      })
    }
  }