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Support folding code blocks (#679)
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stevenjoezhang authored Jul 28, 2023
1 parent a24450d commit 11e534b
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Showing 6 changed files with 67 additions and 14 deletions.
4 changes: 4 additions & 0 deletions _config.yml
Original file line number Diff line number Diff line change
Expand Up @@ -373,6 +373,10 @@ codeblock:
enable: false
# Available values: default | flat | mac
style:
# Fold code block
fold:
enable: false
height: 500

back2top:
enable: true
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1 change: 1 addition & 0 deletions scripts/helpers/next-config.js
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Expand Up @@ -19,6 +19,7 @@ hexo.extend.helper.register('next_config', function() {
exturl : theme.exturl,
sidebar : theme.sidebar,
copycode : theme.codeblock.copy_button,
fold : theme.codeblock.fold,
bookmark : theme.bookmark,
mediumzoom: theme.mediumzoom,
lazyload : theme.lazyload,
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29 changes: 29 additions & 0 deletions source/css/_common/scaffolding/highlight/fold.styl
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@@ -0,0 +1,29 @@
.expand-btn {
bottom: 0;
color: var(--highlight-foreground);
cursor: pointer;
display: none;
left: 0;
right: 0;
position: absolute;
text-align: center;
}

.fold-cover {
background-image: linear-gradient(to top, var(--highlight-background) 0, rgba(0, 0, 0, 0) 100%);
bottom: 0;
display: none;
height: 50px;
left: 0;
right: 0;
position: absolute;
}

.highlight-fold {
max-height: unit(hexo-config('codeblock.fold.height'), 'px');
overflow-y: hidden !important;

.expand-btn, .fold-cover {
display: block;
}
}
1 change: 1 addition & 0 deletions source/css/_common/scaffolding/highlight/index.styl
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Expand Up @@ -13,6 +13,7 @@ if (hexo-config('darkmode')) {
}

@require 'copy-code' if (hexo-config('codeblock.copy_button.enable'));
@require 'fold' if (hexo-config('codeblock.fold.enable'));

// Placeholder: $code-inline $code-block
$code-inline {
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2 changes: 1 addition & 1 deletion source/js/next-boot.js
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Expand Up @@ -46,7 +46,7 @@ NexT.boot.refresh = function() {

CONFIG.exturl && NexT.utils.registerExtURL();
NexT.utils.wrapTableWithBox();
NexT.utils.registerCopyCode();
NexT.utils.registerCodeblock();
NexT.utils.registerTabsTag();
NexT.utils.registerActiveMenuItem();
NexT.utils.registerLangSelect();
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44 changes: 31 additions & 13 deletions source/js/utils.js
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Expand Up @@ -39,30 +39,48 @@ NexT.utils = {
});
},

/**
* One-click copy code support.
*/
registerCopyCode: function() {
registerCodeblock: function() {
let figure = document.querySelectorAll('figure.highlight');
let needWrap = false;
let isHljsWithWrap = true;
if (figure.length === 0) {
figure = document.querySelectorAll('pre:not(.mermaid)');
needWrap = true;
isHljsWithWrap = false;
}
figure.forEach(element => {
element.querySelectorAll('.code .line span').forEach(span => {
span.classList.forEach(name => {
span.classList.replace(name, `hljs-${name}`);
let span = element.querySelectorAll('.code .line span');
if (span.length === 0) {
// Hljs without line_number and wrap
span = element.querySelectorAll('code.highlight span');
}
span.forEach(s => {
s.classList.forEach(name => {
s.classList.replace(name, `hljs-${name}`);
});
});
if (!CONFIG.copycode.enable) return;
let target = element;
if (needWrap) {
const height = parseInt(window.getComputedStyle(element).height.replace('px', ''), 10);
const needFold = CONFIG.fold.enable && (height > CONFIG.fold.height);
if (!needFold && !CONFIG.copycode.enable) return;
let target;
if (isHljsWithWrap && CONFIG.copycode.style === 'mac') {
target = element;
} else {
// https://github.com/next-theme/hexo-theme-next/issues/98
// https://github.com/next-theme/hexo-theme-next/pull/508
const container = element.querySelector('.table-container') || element;
const box = document.createElement('div');
box.className = 'code-container';
element.wrap(box);
container.wrap(box);
target = box;
}
if (needFold) {
target.classList.add('highlight-fold');
target.insertAdjacentHTML('beforeend', '<div class="fold-cover"></div><div class="expand-btn"><i class="fa fa-angle-down fa-fw"></i></div>');
target.querySelector('.expand-btn').addEventListener('click', () => {
target.classList.remove('highlight-fold');
});
}
if (!CONFIG.copycode.enable) return;
// One-click copy code support.
target.insertAdjacentHTML('beforeend', '<div class="copy-btn"><i class="fa fa-copy fa-fw"></i></div>');
const button = target.querySelector('.copy-btn');
button.addEventListener('click', () => {
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