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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* remove outdated comment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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GPG key ID: 4AEE18F83AFDEB23
19 changed files with 140 additions and 44 deletions
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17
modules/markup/markdown/markdown.go
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@ -107,25 +107,18 @@ func actualRender(ctx *markup.RenderContext, input io.Reader, output io.Writer)
languageStr := string(language)
preClasses := []string{}
preClasses := []string{"code-block"}
if languageStr == "mermaid" {
preClasses = append(preClasses, "is-loading")
}
if len(preClasses) > 0 {
_, err := w.WriteString(`<pre class="` + strings.Join(preClasses, " ") + `">`)
if err != nil {
return
}
} else {
_, err := w.WriteString(`<pre>`)
if err != nil {
return
}
_, err := w.WriteString(`<pre class="` + strings.Join(preClasses, " ") + `">`)
if err != nil {
return
}
// include language-x class as part of commonmark spec
_, err := w.WriteString(`<code class="chroma language-` + string(language) + `">`)
_, err = w.WriteString(`<code class="chroma language-` + string(language) + `">`)
if err != nil {
return
}