mirror of
https://github.com/go-gitea/gitea
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61be51e56b
To make the markup package easier to maintain: 1. Split some go files into small files 2. Use a shared util.NopCloser, remove duplicate code 3. Remove unused functions
90 lines
2.4 KiB
Go
90 lines
2.4 KiB
Go
// Copyright 2017 The Gitea Authors. All rights reserved.
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// SPDX-License-Identifier: MIT
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package markup
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import (
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"bytes"
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"io"
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"path/filepath"
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"strings"
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"code.gitea.io/gitea/modules/setting"
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)
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// Renderer defines an interface for rendering markup file to HTML
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type Renderer interface {
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Name() string // markup format name
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Extensions() []string
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SanitizerRules() []setting.MarkupSanitizerRule
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Render(ctx *RenderContext, input io.Reader, output io.Writer) error
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}
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// PostProcessRenderer defines an interface for renderers who need post process
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type PostProcessRenderer interface {
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NeedPostProcess() bool
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}
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// ExternalRenderer defines an interface for external renderers
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type ExternalRenderer interface {
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// SanitizerDisabled disabled sanitize if return true
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SanitizerDisabled() bool
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// DisplayInIFrame represents whether render the content with an iframe
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DisplayInIFrame() bool
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}
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// RendererContentDetector detects if the content can be rendered
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// by specified renderer
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type RendererContentDetector interface {
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CanRender(filename string, input io.Reader) bool
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}
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var (
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extRenderers = make(map[string]Renderer)
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renderers = make(map[string]Renderer)
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)
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// RegisterRenderer registers a new markup file renderer
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func RegisterRenderer(renderer Renderer) {
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renderers[renderer.Name()] = renderer
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for _, ext := range renderer.Extensions() {
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extRenderers[strings.ToLower(ext)] = renderer
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}
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}
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// GetRendererByFileName get renderer by filename
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func GetRendererByFileName(filename string) Renderer {
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extension := strings.ToLower(filepath.Ext(filename))
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return extRenderers[extension]
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}
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// DetectRendererType detects the markup type of the content
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func DetectRendererType(filename string, input io.Reader) string {
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buf, err := io.ReadAll(input)
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if err != nil {
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return ""
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}
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for _, renderer := range renderers {
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if detector, ok := renderer.(RendererContentDetector); ok && detector.CanRender(filename, bytes.NewReader(buf)) {
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return renderer.Name()
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}
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}
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return ""
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}
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// DetectMarkupTypeByFileName returns the possible markup format type via the filename
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func DetectMarkupTypeByFileName(filename string) string {
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if parser := GetRendererByFileName(filename); parser != nil {
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return parser.Name()
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}
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return ""
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}
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func PreviewableExtensions() []string {
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extensions := make([]string, 0, len(extRenderers))
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for extension := range extRenderers {
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extensions = append(extensions, extension)
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}
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return extensions
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}
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