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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 hooks
import (
"context"
"io"
"github.com/gohugoio/hugo/common/hugio"
"github.com/gohugoio/hugo/common/text"
"github.com/gohugoio/hugo/common/types/hstring"
"github.com/gohugoio/hugo/markup/internal/attributes"
)
var _ AttributesOptionsSliceProvider = (*attributes.AttributesHolder)(nil)
type AttributesProvider interface {
// Attributes passed in from Markdown (e.g. { attrName1=attrValue1 attrName2="attr Value 2" }).
Attributes() map[string]any
}
// LinkContext is the context passed to a link render hook.
type LinkContext interface {
PageProvider
// The link URL.
Destination() string
// The link title attribute.
Title() string
// The rendered (HTML) text.
Text() hstring.RenderedString
// The plain variant of Text.
PlainText() string
}
// ImageLinkContext is the context passed to a image link render hook.
type ImageLinkContext interface {
LinkContext
// Returns true if this is a standalone image and the config option
// markup.goldmark.parser.wrapStandAloneImageWithinParagraph is disabled.
IsBlock() bool
// Zero-based ordinal for all the images in the current document.
Ordinal() int
}
// CodeblockContext is the context passed to a code block render hook.
type CodeblockContext interface {
AttributesProvider
text.Positioner
PageProvider
// Chroma highlighting processing options. This will only be filled if Type is a known Chroma Lexer.
Options() map[string]any
// The type of code block. This will be the programming language, e.g. bash, when doing code highlighting.
Type() string
// The text between the code fences.
Inner() string
// Zero-based ordinal for all code blocks in the current document.
Ordinal() int
}
type AttributesOptionsSliceProvider interface {
AttributesSlice() []attributes.Attribute
OptionsSlice() []attributes.Attribute
}
type LinkRenderer interface {
RenderLink(cctx context.Context, w io.Writer, ctx LinkContext) error
}
type CodeBlockRenderer interface {
RenderCodeblock(cctx context.Context, w hugio.FlexiWriter, ctx CodeblockContext) error
}
type IsDefaultCodeBlockRendererProvider interface {
IsDefaultCodeBlockRenderer() bool
}
// HeadingContext contains accessors to all attributes that a HeadingRenderer
// can use to render a heading.
type HeadingContext interface {
PageProvider
// Level is the level of the header (i.e. 1 for top-level, 2 for sub-level, etc.).
Level() int
// Anchor is the HTML id assigned to the heading.
Anchor() string
// Text is the rendered (HTML) heading text, excluding the heading marker.
Text() hstring.RenderedString
// PlainText is the unrendered version of Text.
PlainText() string
// Attributes (e.g. CSS classes)
AttributesProvider
}
type PageProvider interface {
// Page is the page being rendered.
Page() any
// PageInner may be different than Page when .RenderShortcodes is in play.
// The main use case for this is to include other pages' markdown into the current page
// but resolve resources and pages relative to the original.
PageInner() any
}
// HeadingRenderer describes a uniquely identifiable rendering hook.
type HeadingRenderer interface {
// RenderHeading writes the rendered content to w using the data in w.
RenderHeading(cctx context.Context, w io.Writer, ctx HeadingContext) error
}
// ElementPositionResolver provides a way to resolve the start Position
// of a markdown element in the original source document.
// This may be both slow and approximate, so should only be
// used for error logging.
type ElementPositionResolver interface {
ResolvePosition(ctx any) text.Position
}
type RendererType int
const (
LinkRendererType RendererType = iota + 1
ImageRendererType
HeadingRendererType
CodeBlockRendererType
)
type GetRendererFunc func(t RendererType, id any) any
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