export function getElementCompletionProvider()

in src/language/providers/elementCompletion.ts [35:98]
58 lines of code
12 McCabe index (conditional complexity)

export function getElementCompletionProvider(dfdlFormatString: string) {
  return vscode.languages.registerCompletionItemProvider('dfdl', {
    provideCompletionItems(
      document: vscode.TextDocument,
      position: vscode.Position,
      token: vscode.CancellationToken,
      context: vscode.CompletionContext
    ) {
      if (
        checkBraceOpen(document, position) ||
        cursorWithinBraces(document, position) ||
        cursorWithinQuotes(document, position) ||
        cursorAfterEquals(document, position) ||
        isInXPath(document, position)
      ) {
        return undefined
      }

      let nsPrefix = getXsdNsPrefix(document, position)
      let [triggerLine, triggerPos] = [position.line, position.character]
      let triggerText = document.lineAt(triggerLine).text
      let itemsOnLine = getItemsOnLineCount(triggerText)
      let nearestOpenItem = nearestOpen(document, position)
      let lastCloseSymbol = triggerText.lastIndexOf('>')
      let firstOpenSymbol = triggerText.indexOf('<')

      let missingCloseTag = checkMissingCloseTag(document, position, nsPrefix)

      if (nearestOpenItem.includes('none')) {
        if (missingCloseTag !== 'none') {
          return undefined
        }
        if (
          missingCloseTag === 'none' &&
          itemsOnLine > 1 &&
          (triggerPos === lastCloseSymbol + 1 || triggerPos === firstOpenSymbol)
        ) {
          return undefined
        }

        let definedVariables = getDefinedVariables(document)

        let [tagNearestTrigger, tagPosition] = getTagNearestTrigger(
          document,
          position,
          triggerText,
          triggerLine,
          triggerPos,
          itemsOnLine,
          nsPrefix
        )

        return nearestOpenTagChildElements(
          document,
          position,
          tagNearestTrigger,
          tagPosition,
          definedVariables,
          nsPrefix
        )
      }
    },
  })
}