const codeActionButtons = [
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{
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icon: 'copy',
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id: 'copy',
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title: 'Copy Code',
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show: true
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},
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{
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icon: 'order',
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id: 'lines',
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title: 'Toggle Line Numbers',
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show: true
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},
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{
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icon: 'carly',
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id: 'wrap',
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title: 'Toggle Line Wrap',
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show: false
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},
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{
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icon: 'expand',
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id: 'expand',
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title: 'Toggle code block expand',
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show: false
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}
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];
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const body = elem('body');
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const maxLines = parseInt(body.dataset.code);
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const copyId = 'panel_copy';
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const wrapId = 'panel_wrap';
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const linesId = 'panel_lines';
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const panelExpand = 'panel_expand';
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const panelExpanded = 'panel_expanded';
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const panelHide = 'panel_hide';
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const panelFrom = 'panel_from';
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const panelBox = 'panel_box';
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const fullHeight = 'initial';
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const highlightWrap = 'highlight_wrap'
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const highlight = 'highlight';
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function wrapOrphanedPreElements() {
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const pres = elems('pre');
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Array.from(pres).forEach(function(pre){
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const parent = pre.parentNode;
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const isOrpaned = !containsClass(parent, highlight) ;
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if(isOrpaned) {
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const preWrapper = createEl();
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preWrapper.className = highlight;
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const outerWrapper = createEl();
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outerWrapper.className = highlightWrap;
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wrapEl(pre, preWrapper);
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wrapEl(preWrapper, outerWrapper);
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}
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})
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/*
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@Todo
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1. Add UI control to orphaned blocks
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*/
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}
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wrapOrphanedPreElements();
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function codeBlocks() {
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const markedCodeBlocks = elems('code');
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const blocks = Array.from(markedCodeBlocks).filter(function(block){
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return block.closest("pre") && !Array.from(block.classList).includes('noClass');
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}).map(function(block){
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return block
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});
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return blocks;
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}
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function codeBlockFits(block) {
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// return false if codeblock overflows
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const blockWidth = block.offsetWidth;
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const highlightBlockWidth = block.closest(`.${highlight}`).offsetWidth;
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return blockWidth <= highlightBlockWidth ? true : false;
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}
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function maxHeightIsSet(elem) {
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let maxHeight = elem.style.maxHeight;
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return maxHeight.includes('px')
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}
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function restrainCodeBlockHeight(lines) {
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const lastLine = lines[maxLines-1];
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let maxCodeBlockHeight = fullHeight;
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if(lastLine) {
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const lastLinePos = lastLine.offsetTop;
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if(lastLinePos !== 0) {
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maxCodeBlockHeight = `${lastLinePos}px`;
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const codeBlock = lines[0].parentNode;
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const outerBlock = codeBlock.closest('.highlight');
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const isExpanded = containsClass(outerBlock, panelExpanded);
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if(!isExpanded) {
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codeBlock.dataset.height = maxCodeBlockHeight;
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codeBlock.style.maxHeight = maxCodeBlockHeight;
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}
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}
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}
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}
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const blocks = codeBlocks();
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function collapseCodeBlock(block) {
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const lines = elems('.ln', block);
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const codeLines = lines.length;
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if(!lines) {
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// hide lines toggle button for blocks that have no lines.
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setTimeout(() => {
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let panelLinesParentEl = block.closest(`.${highlightWrap}`);
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let panelLinesEl = elem(`.${linesId}`, panelLinesParentEl);
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pushClass(panelLinesEl, panelHide);
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}, 2000)
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}
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if (codeLines > maxLines) {
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const expandDot = createEl()
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pushClass(expandDot, panelExpand);
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pushClass(expandDot, panelFrom);
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expandDot.title = "Toggle code block expand";
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expandDot.textContent = "...";
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const outerBlock = block.closest('.highlight');
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window.setTimeout(function(){
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const expandIcon = outerBlock.nextElementSibling.lastElementChild;
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deleteClass(expandIcon, panelHide);
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}, 150)
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restrainCodeBlockHeight(lines);
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const highlightElement = block.parentNode.parentNode;
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highlightElement.appendChild(expandDot);
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}
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}
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blocks.forEach(function(block){
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collapseCodeBlock(block);
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})
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function actionPanel() {
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const panel = createEl();
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panel.className = panelBox;
|
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codeActionButtons.forEach(function(button) {
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// create button
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const btn = createEl('a');
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btn.href = '#';
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btn.title = button.title;
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btn.className = `icon panel_icon panel_${button.id}`;
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button.show ? false : pushClass(btn, panelHide);
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// load icon inside button
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loadSvg(button.icon, btn);
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// append button on panel
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panel.appendChild(btn);
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});
|
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return panel;
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}
|
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function toggleLineNumbers(elems) {
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elems.forEach(function (elem, index) {
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// mark the code element when there are no lines
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modifyClass(elem, 'pre_nolines')
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});
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restrainCodeBlockHeight(elems);
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}
|
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function toggleLineWrap(elem) {
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modifyClass(elem, 'pre_wrap');
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// retain max number of code lines on line wrap
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const lines = elems('.ln', elem);
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restrainCodeBlockHeight(lines);
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}
|
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function copyCode(codeElement) {
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lineNumbers = elems('.ln', codeElement);
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// remove line numbers before copying
|
if(lineNumbers.length) {
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lineNumbers.forEach(function(line){
|
line.remove();
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});
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}
|
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const codeToCopy = codeElement.textContent;
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// copy code
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copyToClipboard(codeToCopy);
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}
|
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function disableCodeLineNumbers(block){
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const lines = elems('.ln', block)
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toggleLineNumbers(lines);
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}
|
|
(function codeActions(){
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const blocks = codeBlocks();
|
|
const highlightWrapId = highlightWrap;
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blocks.forEach(function(block){
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// disable line numbers if disabled globally
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const showLines = elem('body').dataset.lines;
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parseBoolean(showLines) === false ? disableCodeLineNumbers(block) : false;
|
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const highlightElement = block.parentNode.parentNode;
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// wrap code block in a div
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const highlightWrapper = createEl();
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highlightWrapper.className = highlightWrapId;
|
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wrapEl(highlightElement, highlightWrapper);
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const panel = actionPanel();
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// show wrap icon only if the code block needs wrapping
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const wrapIcon = elem(`.${wrapId}`, panel);
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codeBlockFits(block) ? false : deleteClass(wrapIcon, panelHide);
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// append buttons
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highlightWrapper.appendChild(panel);
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});
|
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function isItem(target, id) {
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// if is item or within item
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return target.matches(`.${id}`) || target.closest(`.${id}`);
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}
|
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function showActive(target, targetClass,activeClass = 'active') {
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const active = activeClass;
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const targetElement = target.matches(`.${targetClass}`) ? target : target.closest(`.${targetClass}`);
|
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deleteClass(targetElement, active);
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setTimeout(function() {
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modifyClass(targetElement, active)
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}, 50)
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}
|
|
doc.addEventListener('click', function(event){
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// copy code block
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const target = event.target;
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const isCopyIcon = isItem(target, copyId);
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const isWrapIcon = isItem(target, wrapId);
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const isLinesIcon = isItem(target, linesId);
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const isExpandIcon = isItem(target, panelExpand);
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const isActionable = isCopyIcon || isWrapIcon || isLinesIcon || isExpandIcon;
|
|
if(isActionable) {
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event.preventDefault();
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showActive(target, 'icon');
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const codeElement = target.closest(`.${highlightWrapId}`).firstElementChild.firstElementChild;
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let lineNumbers = elems('.ln', codeElement);
|
|
isWrapIcon ? toggleLineWrap(codeElement) : false;
|
|
isLinesIcon ? toggleLineNumbers(lineNumbers) : false;
|
|
if (isExpandIcon) {
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let thisCodeBlock = codeElement.firstElementChild;
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const outerBlock = thisCodeBlock.closest('.highlight');
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if(maxHeightIsSet(thisCodeBlock)) {
|
thisCodeBlock.style.maxHeight = fullHeight;
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// mark code block as expanded
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pushClass(outerBlock, panelExpanded)
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} else {
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thisCodeBlock.style.maxHeight = thisCodeBlock.dataset.height;
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// unmark code block as expanded
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deleteClass(outerBlock, panelExpanded)
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}
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}
|
|
if(isCopyIcon) {
|
// clone code element
|
const codeElementClone = codeElement.cloneNode(true);
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copyCode(codeElementClone);
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}
|
}
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});
|
|
(function addLangLabel() {
|
const blocks = codeBlocks();
|
blocks.forEach(function(block){
|
let label = block.dataset.lang;
|
label = label === 'sh' ? 'bash' : label;
|
if(label !== "fallback") {
|
const labelEl = createEl();
|
labelEl.textContent = label;
|
pushClass(labelEl, 'lang');
|
block.closest(`.${highlightWrap}`).appendChild(labelEl);
|
}
|
});
|
})();
|
})();
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