lucid-ui/lib/coverage/lcov-report/block-navigation.js

A UI component library from AppNexus.

/* eslint-disable */
var jumpToCode = function init() {
  // Classes of code we would like to highlight in the file view
  var missingCoverageClasses = ['.cbranch-no', '.cstat-no', '.fstat-no']; // Elements to highlight in the file listing view

  var fileListingElements = ['td.pct.low']; // We don't want to select elements that are direct descendants of another match

  var notSelector = ':not(' + missingCoverageClasses.join('):not(') + ') > '; // becomes `:not(a):not(b) > `
  // Selecter that finds elements on the page to which we can jump

  var selector = fileListingElements.join(', ') + ', ' + notSelector + missingCoverageClasses.join(', ' + notSelector); // becomes `:not(a):not(b) > a, :not(a):not(b) > b`
  // The NodeList of matching elements

  var missingCoverageElements = document.querySelectorAll(selector);
  var currentIndex;

  function toggleClass(index) {
    missingCoverageElements.item(currentIndex).classList.remove('highlighted');
    missingCoverageElements.item(index).classList.add('highlighted');
  }

  function makeCurrent(index) {
    toggleClass(index);
    currentIndex = index;
    missingCoverageElements.item(index).scrollIntoView({
      behavior: 'smooth',
      block: 'center',
      inline: 'center'
    });
  }

  function goToPrevious() {
    var nextIndex = 0;

    if (typeof currentIndex !== 'number' || currentIndex === 0) {
      nextIndex = missingCoverageElements.length - 1;
    } else if (missingCoverageElements.length > 1) {
      nextIndex = currentIndex - 1;
    }

    makeCurrent(nextIndex);
  }

  function goToNext() {
    var nextIndex = 0;

    if (typeof currentIndex === 'number' && currentIndex < missingCoverageElements.length - 1) {
      nextIndex = currentIndex + 1;
    }

    makeCurrent(nextIndex);
  }

  return function jump(event) {
    switch (event.which) {
      case 78: // n

      case 74:
        // j
        goToNext();
        break;

      case 66: // b

      case 75: // k

      case 80:
        // p
        goToPrevious();
        break;
    }
  };
}();

window.addEventListener('keydown', jumpToCode);