mirror of
https://codeberg.org/forgejo/forgejo.git
synced 2024-12-11 20:44:55 +00:00
9d99f6ab19
* Refactor renders * Some performance optimization * Fix comment * Transform reader * Fix csv test * Fix test * Fix tests * Improve optimaziation * Fix test * Fix test * Detect file encoding with reader * Improve optimaziation * reduce memory usage * improve code * fix build * Fix test * Fix for go1.15 * Fix render * Fix comment * Fix lint * Fix test * Don't use NormalEOF when unnecessary * revert change on util.go * Apply suggestions from code review Co-authored-by: zeripath <art27@cantab.net> * rename function * Take NormalEOF back Co-authored-by: zeripath <art27@cantab.net>
202 lines
5 KiB
Go
202 lines
5 KiB
Go
// Copyright 2017 The Gitea Authors. All rights reserved.
|
|
// Use of this source code is governed by a MIT-style
|
|
// license that can be found in the LICENSE file.
|
|
|
|
package markup
|
|
|
|
import (
|
|
"context"
|
|
"errors"
|
|
"fmt"
|
|
"io"
|
|
"path/filepath"
|
|
"strings"
|
|
"sync"
|
|
|
|
"code.gitea.io/gitea/modules/setting"
|
|
)
|
|
|
|
// Init initialize regexps for markdown parsing
|
|
func Init() {
|
|
getIssueFullPattern()
|
|
NewSanitizer()
|
|
if len(setting.Markdown.CustomURLSchemes) > 0 {
|
|
CustomLinkURLSchemes(setting.Markdown.CustomURLSchemes)
|
|
}
|
|
|
|
// since setting maybe changed extensions, this will reload all renderer extensions mapping
|
|
extRenderers = make(map[string]Renderer)
|
|
for _, renderer := range renderers {
|
|
for _, ext := range renderer.Extensions() {
|
|
extRenderers[strings.ToLower(ext)] = renderer
|
|
}
|
|
}
|
|
}
|
|
|
|
// RenderContext represents a render context
|
|
type RenderContext struct {
|
|
Ctx context.Context
|
|
Filename string
|
|
Type string
|
|
IsWiki bool
|
|
URLPrefix string
|
|
Metas map[string]string
|
|
DefaultLink string
|
|
}
|
|
|
|
// Renderer defines an interface for rendering markup file to HTML
|
|
type Renderer interface {
|
|
Name() string // markup format name
|
|
Extensions() []string
|
|
Render(ctx *RenderContext, input io.Reader, output io.Writer) error
|
|
}
|
|
|
|
var (
|
|
extRenderers = make(map[string]Renderer)
|
|
renderers = make(map[string]Renderer)
|
|
)
|
|
|
|
// RegisterRenderer registers a new markup file renderer
|
|
func RegisterRenderer(renderer Renderer) {
|
|
renderers[renderer.Name()] = renderer
|
|
for _, ext := range renderer.Extensions() {
|
|
extRenderers[strings.ToLower(ext)] = renderer
|
|
}
|
|
}
|
|
|
|
// GetRendererByFileName get renderer by filename
|
|
func GetRendererByFileName(filename string) Renderer {
|
|
extension := strings.ToLower(filepath.Ext(filename))
|
|
return extRenderers[extension]
|
|
}
|
|
|
|
// GetRendererByType returns a renderer according type
|
|
func GetRendererByType(tp string) Renderer {
|
|
return renderers[tp]
|
|
}
|
|
|
|
// Render renders markup file to HTML with all specific handling stuff.
|
|
func Render(ctx *RenderContext, input io.Reader, output io.Writer) error {
|
|
if ctx.Type != "" {
|
|
return renderByType(ctx, input, output)
|
|
} else if ctx.Filename != "" {
|
|
return renderFile(ctx, input, output)
|
|
}
|
|
return errors.New("Render options both filename and type missing")
|
|
}
|
|
|
|
// RenderString renders Markup string to HTML with all specific handling stuff and return string
|
|
func RenderString(ctx *RenderContext, content string) (string, error) {
|
|
var buf strings.Builder
|
|
if err := Render(ctx, strings.NewReader(content), &buf); err != nil {
|
|
return "", err
|
|
}
|
|
return buf.String(), nil
|
|
}
|
|
|
|
func render(ctx *RenderContext, parser Renderer, input io.Reader, output io.Writer) error {
|
|
var wg sync.WaitGroup
|
|
var err error
|
|
pr, pw := io.Pipe()
|
|
defer func() {
|
|
_ = pr.Close()
|
|
_ = pw.Close()
|
|
}()
|
|
|
|
pr2, pw2 := io.Pipe()
|
|
defer func() {
|
|
_ = pr2.Close()
|
|
_ = pw2.Close()
|
|
}()
|
|
|
|
wg.Add(1)
|
|
go func() {
|
|
buf := SanitizeReader(pr2)
|
|
_, err = io.Copy(output, buf)
|
|
_ = pr2.Close()
|
|
wg.Done()
|
|
}()
|
|
|
|
wg.Add(1)
|
|
go func() {
|
|
err = PostProcess(ctx, pr, pw2)
|
|
_ = pr.Close()
|
|
_ = pw2.Close()
|
|
wg.Done()
|
|
}()
|
|
|
|
if err1 := parser.Render(ctx, input, pw); err1 != nil {
|
|
return err1
|
|
}
|
|
_ = pw.Close()
|
|
|
|
wg.Wait()
|
|
return err
|
|
}
|
|
|
|
// ErrUnsupportedRenderType represents
|
|
type ErrUnsupportedRenderType struct {
|
|
Type string
|
|
}
|
|
|
|
func (err ErrUnsupportedRenderType) Error() string {
|
|
return fmt.Sprintf("Unsupported render type: %s", err.Type)
|
|
}
|
|
|
|
func renderByType(ctx *RenderContext, input io.Reader, output io.Writer) error {
|
|
if renderer, ok := renderers[ctx.Type]; ok {
|
|
return render(ctx, renderer, input, output)
|
|
}
|
|
return ErrUnsupportedRenderType{ctx.Type}
|
|
}
|
|
|
|
// ErrUnsupportedRenderExtension represents the error when extension doesn't supported to render
|
|
type ErrUnsupportedRenderExtension struct {
|
|
Extension string
|
|
}
|
|
|
|
func (err ErrUnsupportedRenderExtension) Error() string {
|
|
return fmt.Sprintf("Unsupported render extension: %s", err.Extension)
|
|
}
|
|
|
|
func renderFile(ctx *RenderContext, input io.Reader, output io.Writer) error {
|
|
extension := strings.ToLower(filepath.Ext(ctx.Filename))
|
|
if renderer, ok := extRenderers[extension]; ok {
|
|
return render(ctx, renderer, input, output)
|
|
}
|
|
return ErrUnsupportedRenderExtension{extension}
|
|
}
|
|
|
|
// Type returns if markup format via the filename
|
|
func Type(filename string) string {
|
|
if parser := GetRendererByFileName(filename); parser != nil {
|
|
return parser.Name()
|
|
}
|
|
return ""
|
|
}
|
|
|
|
// IsMarkupFile reports whether file is a markup type file
|
|
func IsMarkupFile(name, markup string) bool {
|
|
if parser := GetRendererByFileName(name); parser != nil {
|
|
return parser.Name() == markup
|
|
}
|
|
return false
|
|
}
|
|
|
|
// IsReadmeFile reports whether name looks like a README file
|
|
// based on its name. If an extension is provided, it will strictly
|
|
// match that extension.
|
|
// Note that the '.' should be provided in ext, e.g ".md"
|
|
func IsReadmeFile(name string, ext ...string) bool {
|
|
name = strings.ToLower(name)
|
|
if len(ext) > 0 {
|
|
return name == "readme"+ext[0]
|
|
}
|
|
if len(name) < 6 {
|
|
return false
|
|
} else if len(name) == 6 {
|
|
return name == "readme"
|
|
}
|
|
return name[:7] == "readme."
|
|
}
|