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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* remove outdated comment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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32
web_src/less/markup/codecopy.less Normal file
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.markup .code-block {
position: relative;
}
.markup .code-copy {
position: absolute;
top: 8px;
right: 6px;
padding: 9px;
visibility: hidden;
animation: fadeout .2s both;
}
/* adjustments for comment content having only 14px font size */
.repository.view.issue .comment-list .comment .markup .code-copy {
right: 5px;
padding: 8px;
}
/* can not use regular transparent button colors for hover and active states because
we need opaque colors here as code can appear behind the button */
.markup .code-copy:hover {
background: var(--color-secondary) !important;
}
.markup .code-copy:active {
background: var(--color-secondary-dark-1) !important;
}
.markup .code-block:hover .code-copy {
visibility: visible;
animation: fadein .2s both;
}