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Add copy button to markdown code blocks (#17638)

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* Add copy button to markdown code blocks

Done mostly in JS because I think it's better not to try getting buttons
past the markup sanitizer.

* add svg module tests

* fix sanitizer regexp

* remove outdated comment

* vertically center button in issue comments as well

* add comment to css

* fix undefined on view file line copy

* combine animation less files

* Update modules/markup/markdown/markdown.go

Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

* add test for different sizes

* add cloneNode and add tests for it

* use deep clone

* remove useless optional chaining

* remove the svg node cache

* unify clipboard copy string and i18n

* remove unused var

* remove unused localization

* minor css tweaks to the button

* comment tweak

* remove useless attribute

Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
This commit is contained in:
silverwind 2021-11-16 09:16:05 +01:00 • committed by GitHub
parent d789670894
commit 23bd7b1211
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19 changed files with 140 additions and 44 deletions
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16
web_src/js/markup/codecopy.js Normal file
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@ -0,0 +1,16 @@
import {svg} from '../svg.js';
export function renderCodeCopy() {
const els = document.querySelectorAll('.markup .code-block code');
if (!els.length) return;
const button = document.createElement('button');
button.classList.add('code-copy', 'ui', 'button');
button.innerHTML = svg('octicon-copy');
for (const el of els) {
const btn = button.cloneNode(true);
btn.setAttribute('data-clipboard-text', el.textContent);
el.after(btn);
}
}