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gitea/modules/markup/asciicast/asciicast.go
Jason Song d9f748a700
Support asciicast files as new markup (#22448)
Support [asciicast
files](https://github.com/asciinema/asciinema/blob/develop/doc/asciicast-v2.md)
as a new markup via
[asciinema-player](https://github.com/asciinema/asciinema-player). For
more on asciinema, see the [introduction](https://asciinema.org/).

So users can use asciinema recorder to generate an asciicast file (or
you can download a sample file from
https://asciinema.org/a/335480.cast?dl=1), then upload it to Gitea and
play it on Gitea.

Snapshots:
<details>

## Upload asciicast files

<img width="1134" alt="image"
src="https://user-images.githubusercontent.com/9418365/212461061-cc2c7181-0e14-4534-af55-1ec60a639fd1.png">

## Open an asciicast file

<img width="1137" alt="image"
src="https://user-images.githubusercontent.com/9418365/212461090-a3b5141f-4894-430d-a2b4-ea257801a0ed.png">

## Play it

<img width="1144" alt="image"
src="https://user-images.githubusercontent.com/9418365/212461157-4e82db69-0e41-471d-928f-ac1fe0737105.png">

## Copy contents from the "video"

<img width="1145" alt="image"
src="https://user-images.githubusercontent.com/9418365/212461286-211612bc-15d6-427a-89a9-6abff5c6a0a5.png">


## View the source

<img width="1140" alt="image"
src="https://user-images.githubusercontent.com/9418365/212461187-05473b2d-ba3d-4072-84a6-4aa1e7d82182.png">


</details>

Known issue:

Don't support the [v1 version asciicast
files](https://github.com/asciinema/asciinema/blob/develop/doc/asciicast-v1.md),
it's a poorly designed version, it does not specify the file extension
and uses `*.json` usually, so it's impossible to recognize the files.

Co-authored-by: silverwind <me@silverwind.io>
Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
2023-01-18 08:46:58 +08:00

64 lines
1.5 KiB
Go

// Copyright 2023 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package asciicast
import (
"fmt"
"io"
"net/url"
"regexp"
"code.gitea.io/gitea/modules/markup"
"code.gitea.io/gitea/modules/setting"
)
func init() {
markup.RegisterRenderer(Renderer{})
}
// Renderer implements markup.Renderer for asciicast files.
// See https://github.com/asciinema/asciinema/blob/develop/doc/asciicast-v2.md
type Renderer struct{}
// Name implements markup.Renderer
func (Renderer) Name() string {
return "asciicast"
}
// Extensions implements markup.Renderer
func (Renderer) Extensions() []string {
return []string{".cast"}
}
const (
playerClassName = "asciinema-player-container"
playerSrcAttr = "data-asciinema-player-src"
)
// SanitizerRules implements markup.Renderer
func (Renderer) SanitizerRules() []setting.MarkupSanitizerRule {
return []setting.MarkupSanitizerRule{
{Element: "div", AllowAttr: "class", Regexp: regexp.MustCompile(playerClassName)},
{Element: "div", AllowAttr: playerSrcAttr},
}
}
// Render implements markup.Renderer
func (Renderer) Render(ctx *markup.RenderContext, _ io.Reader, output io.Writer) error {
rawURL := fmt.Sprintf("%s/%s/%s/raw/%s/%s",
setting.AppSubURL,
url.PathEscape(ctx.Metas["user"]),
url.PathEscape(ctx.Metas["repo"]),
ctx.Metas["BranchNameSubURL"],
url.PathEscape(ctx.RelativePath),
)
_, err := io.WriteString(output, fmt.Sprintf(
`<div class="%s" %s="%s"></div>`,
playerClassName,
playerSrcAttr,
rawURL,
))
return err
}