64 lines
1.9 KiB
JavaScript
64 lines
1.9 KiB
JavaScript
var jumpToCode = (function init () {
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// Classes of code we would like to highlight
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var missingCoverageClasses = [ '.cbranch-no', '.cstat-no', '.fstat-no' ];
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// We don't want to select elements that are direct descendants of another match
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var notSelector = ':not(' + missingCoverageClasses.join('):not(') + ') > '; // becomes `:not(a):not(b) > `
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// Selecter that finds elements on the page to which we can jump
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var selector = notSelector + missingCoverageClasses.join(', ' + notSelector); // becomes `:not(a):not(b) > a, :not(a):not(b) > b`
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// The NodeList of matching elements
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var missingCoverageElements = document.querySelectorAll(selector);
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var currentIndex;
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function toggleClass(index) {
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missingCoverageElements.item(currentIndex).classList.remove('highlighted');
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missingCoverageElements.item(index).classList.add('highlighted');
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}
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function makeCurrent(index) {
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toggleClass(index);
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currentIndex = index;
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missingCoverageElements.item(index)
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.scrollIntoView({ behavior: 'smooth', block: 'center', inline: 'center' });
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}
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function goToPrevious() {
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var nextIndex = 0;
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if (typeof currentIndex !== 'number' || currentIndex === 0) {
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nextIndex = missingCoverageElements.length - 1;
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} else if (missingCoverageElements.length > 1) {
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nextIndex = currentIndex - 1;
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}
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makeCurrent(nextIndex);
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}
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function goToNext() {
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var nextIndex = 0;
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if (typeof currentIndex === 'number' && currentIndex < (missingCoverageElements.length - 1)) {
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nextIndex = currentIndex + 1;
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}
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makeCurrent(nextIndex);
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}
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return function jump(event) {
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switch (event.which) {
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case 78: // n
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case 74: // j
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goToNext();
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break;
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case 66: // b
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case 75: // k
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case 80: // p
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goToPrevious();
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break;
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}
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};
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}());
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window.addEventListener('keydown', jumpToCode);
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