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// Copyright 2019 The Hugo Authors. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package converter
import (
"bytes"
"context"
"github.com/gohugoio/hugo/common/hexec"
"github.com/gohugoio/hugo/common/loggers"
"github.com/gohugoio/hugo/config"
"github.com/gohugoio/hugo/identity"
"github.com/gohugoio/hugo/markup/converter/hooks"
"github.com/gohugoio/hugo/markup/highlight"
"github.com/gohugoio/hugo/markup/markup_config"
"github.com/gohugoio/hugo/markup/tableofcontents"
"github.com/spf13/afero"
)
// ProviderConfig configures a new Provider.
type ProviderConfig struct {
Conf config.AllProvider // Site config
ContentFs afero.Fs
Logger loggers.Logger
Exec *hexec.Exec
highlight.Highlighter
}
func (p ProviderConfig) MarkupConfig() markup_config.Config {
return p.Conf.GetConfigSection("markup").(markup_config.Config)
}
// ProviderProvider creates converter providers.
type ProviderProvider interface {
New(cfg ProviderConfig) (Provider, error)
}
// Provider creates converters.
type Provider interface {
New(ctx DocumentContext) (Converter, error)
Name() string
}
// NewProvider creates a new Provider with the given name.
func NewProvider(name string, create func(ctx DocumentContext) (Converter, error)) Provider {
return newConverter{
name: name,
create: create,
}
}
type newConverter struct {
name string
create func(ctx DocumentContext) (Converter, error)
}
func (n newConverter) New(ctx DocumentContext) (Converter, error) {
return n.create(ctx)
}
func (n newConverter) Name() string {
return n.name
}
var NopConverter = new(nopConverter)
type nopConverter int
func (nopConverter) Convert(ctx RenderContext) (ResultRender, error) {
return &bytes.Buffer{}, nil
}
func (nopConverter) Supports(feature identity.Identity) bool {
return false
}
// Converter wraps the Convert method that converts some markup into
// another format, e.g. Markdown to HTML.
type Converter interface {
Convert(ctx RenderContext) (ResultRender, error)
}
// ParseRenderer is an optional interface.
// The Goldmark converter implements this, and this allows us
// to extract the ToC without having to render the content.
type ParseRenderer interface {
Parse(RenderContext) (ResultParse, error)
Render(RenderContext, any) (ResultRender, error)
}
// ResultRender represents the minimum returned from Convert and Render.
type ResultRender interface {
Bytes() []byte
}
// ResultParse represents the minimum returned from Parse.
type ResultParse interface {
Doc() any
TableOfContents() *tableofcontents.Fragments
}
// DocumentInfo holds additional information provided by some converters.
type DocumentInfo interface {
AnchorSuffix() string
}
// TableOfContentsProvider provides the content as a ToC structure.
type TableOfContentsProvider interface {
TableOfContents() *tableofcontents.Fragments
}
// AnchorNameSanitizer tells how a converter sanitizes anchor names.
type AnchorNameSanitizer interface {
SanitizeAnchorName(s string) string
}
// Bytes holds a byte slice and implements the Result interface.
type Bytes []byte
// Bytes returns itself
func (b Bytes) Bytes() []byte {
return b
}
// DocumentContext holds contextual information about the document to convert.
type DocumentContext struct {
Document any // May be nil. Usually a page.Page
DocumentID string
DocumentName string
Filename string
}
// RenderContext holds contextual information about the content to render.
type RenderContext struct {
// Ctx is the context.Context for the current Page render.
Ctx context.Context
// Src is the content to render.
Src []byte
// Whether to render TableOfContents.
RenderTOC bool
// GerRenderer provides hook renderers on demand.
GetRenderer hooks.GetRendererFunc
}
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