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Editor preview support for external renderers (#23333)

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Remove `[repository.editor] PREVIEWABLE_FILE_MODES` setting that seemed
like it was intended to support this but did not work. Instead, whenever
viewing a file shows a preview, also have a Preview tab in the file
editor.

Add new `/markup` web and API endpoints with `comment`, `gfm`,
`markdown` and new `file` mode that uses a file path to determine the
renderer.

Remove `/markdown` web endpoint but keep the API for backwards and
GitHub compatibility.

## ⚠️ BREAKING ⚠️

The `[repository.editor] PREVIEWABLE_FILE_MODES` setting was removed.
This setting served no practical purpose and was not working correctly.
Instead a preview tab is always shown in the file editor when supported.

---------

Co-authored-by: zeripath <art27@cantab.net>
Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
This commit is contained in:
Brecht Van Lommel 2023-03-24 07:12:23 +01:00 • committed by GitHub
parent 9e04627aca
commit 84daddc2fa
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GPG key ID: 4AEE18F83AFDEB23
23 changed files with 389 additions and 215 deletions
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13
modules/markup/renderer.go
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@ -283,6 +283,11 @@ type ErrUnsupportedRenderExtension struct {
Extension string
}
func IsErrUnsupportedRenderExtension(err error) bool {
_, ok := err.(ErrUnsupportedRenderExtension)
return ok
}
func (err ErrUnsupportedRenderExtension) Error() string {
return fmt.Sprintf("Unsupported render extension: %s", err.Extension)
}
@ -317,3 +322,11 @@ func IsMarkupFile(name, markup string) bool {
}
return false
}
func PreviewableExtensions() []string {
extensions := make([]string, 0, len(extRenderers))
for extension := range extRenderers {
extensions = append(extensions, extension)
}
return extensions
}