openrat-cms

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highlight_worker.js (2276B)

      1 import { getContextBefore, highlightLine, processLine } from "../line/highlight.js"
      2 import { copyState } from "../modes.js"
      3 import { bind } from "../util/misc.js"
      4 
      5 import { runInOp } from "./operations.js"
      6 import { regLineChange } from "./view_tracking.js"
      7 
      8 // HIGHLIGHT WORKER
      9 
     10 export function startWorker(cm, time) {
     11   if (cm.doc.highlightFrontier < cm.display.viewTo)
     12     cm.state.highlight.set(time, bind(highlightWorker, cm))
     13 }
     14 
     15 function highlightWorker(cm) {
     16   let doc = cm.doc
     17   if (doc.highlightFrontier >= cm.display.viewTo) return
     18   let end = +new Date + cm.options.workTime
     19   let context = getContextBefore(cm, doc.highlightFrontier)
     20   let changedLines = []
     21 
     22   doc.iter(context.line, Math.min(doc.first + doc.size, cm.display.viewTo + 500), line => {
     23     if (context.line >= cm.display.viewFrom) { // Visible
     24       let oldStyles = line.styles
     25       let resetState = line.text.length > cm.options.maxHighlightLength ? copyState(doc.mode, context.state) : null
     26       let highlighted = highlightLine(cm, line, context, true)
     27       if (resetState) context.state = resetState
     28       line.styles = highlighted.styles
     29       let oldCls = line.styleClasses, newCls = highlighted.classes
     30       if (newCls) line.styleClasses = newCls
     31       else if (oldCls) line.styleClasses = null
     32       let ischange = !oldStyles || oldStyles.length != line.styles.length ||
     33         oldCls != newCls && (!oldCls || !newCls || oldCls.bgClass != newCls.bgClass || oldCls.textClass != newCls.textClass)
     34       for (let i = 0; !ischange && i < oldStyles.length; ++i) ischange = oldStyles[i] != line.styles[i]
     35       if (ischange) changedLines.push(context.line)
     36       line.stateAfter = context.save()
     37       context.nextLine()
     38     } else {
     39       if (line.text.length <= cm.options.maxHighlightLength)
     40         processLine(cm, line.text, context)
     41       line.stateAfter = context.line % 5 == 0 ? context.save() : null
     42       context.nextLine()
     43     }
     44     if (+new Date > end) {
     45       startWorker(cm, cm.options.workDelay)
     46       return true
     47     }
     48   })
     49   doc.highlightFrontier = context.line
     50   doc.modeFrontier = Math.max(doc.modeFrontier, context.line)
     51   if (changedLines.length) runInOp(cm, () => {
     52     for (let i = 0; i < changedLines.length; i++)
     53       regLineChange(cm, changedLines[i], "text")
     54   })
     55 }