On this page:
7.4.1 Rendering Driver
render
7.4.2 Base Renderer
render%
traverse
collect
resolve
render
serialize-info
deserialize-info
get-defined
get-external
get-undefined
7.4.3 Text Renderer
render-mixin
7.4.4 HTML Renderer
render-mixin
set-external-tag-path
set-external-root-url
render-multi-mixin
7.4.5 Latex Renderer
render-mixin
7.4.6 PDF Renderer
render-mixin

7.4 Renderers

A renderer is an object that provides four main methods: traverse, collect, resolve, and render. Each method corresponds to a pass described in Structures And Processing, and they are chained together by the render function to render a document.

7.4.1 Rendering Driver

 (require scribble/render)

(render docs    
  names    
  [#:render-mixin render-mixin    
  #:dest-dir dest-dir    
  #:prefix-file prefix-file    
  #:style-file style-file    
  #:style-extra-files style-extra-files    
  #:extra-files extra-files    
  #:xrefs xrefs    
  #:info-in-files info-in-files    
  #:info-out-file info-out-file    
  #:redirect redirect    
  #:redirect-main redirect-main    
  #:quiet? quiet?    
  #:warn-undefined? warn-undefined?])  void?
  docs : (listof part?)
  names : (listof path-string?)
  render-mixin : (class? . -> . class?) = render-mixin
  dest-dir : (or/c #f path-string?) = #f
  prefix-file : (or/c #f path-string?) = #f
  style-file : (or/c #f path-string?) = #f
  style-extra-files : (listof path-string?) = #f
  extra-files : (listof path-string?) = #f
  xrefs : (listof xref?) = null
  info-in-files : (listof path?) = null
  info-out-file : (or/c #f path-string?) = #f
  redirect : (or/c #f string?) = #f
  redirect-main : (or/c #f string?) = #f
  quiet? : any/c = #t
  warn-undefined? : any/c = (not quiet?)
Renders the given docs, each with an output name derived from the corresponding element of names. A directory path (if any) for a name in names is discarded, and the file suffix is replaced (if any) with a suitable suffix for the output format.

The render-mixin argument determines the output format. By default, it is render-mixin from scribble/html-render.

The dest-dir argument determines the output directory, which is created using make-directory* if it is non-#f and does not exist already.

The prefix-file, style-file, extra-style-files, and extra-files arguments are passed on to the render% constructor.

The xrefs argument provides extra cross-reference information to be used during the documents’ resolve pass. The info-in-files arguments supply additional cross-reference information in serialized form. When the info-out-file argument is not #f, cross-reference information for the rendered documents is written in serialized for to the specified file.

The redirect and redirect-main arguments correspond to the set-external-tag-path and set-external-root-url methods of render-mixin from scribble/html-render, so they should be non-#f only for HTML rendering.

If quiet? is a false value, output-file information is written to the current output port.

If warn-undefined? is a true value, then references to missing cross-reference targets trigger a warning message on the current error port.

7.4.2 Base Renderer

The scribble/base-render module provides render%, which implements the core of a renderer. This rendering class must be refined with a mixin from scribble/text-render, scribble/html-render, or scribble/latex-render.

The mixin structure is meant to support document-specific extensions to the renderers. For example, the scribble command-line tool might, in the future, extract rendering mixins from a document module (in addition to the document proper).

See the "base-render.rkt" source for more information about the methods of the renderer. Documents built with higher layers, such as scribble/manual, generally do not call the render object’s methods directly.

render% : class?

  superclass: object%

Represents a renderer.

(new render% 
  [dest-dir dest-dir] 
  [[refer-to-existing-files refer-to-existing-files] 
  [root-path root-path] 
  [prefix-file prefix-file] 
  [style-file style-file] 
  [style-extra-files style-extra-files] 
  [extra-files extra-files]]) 
  (is-a?/c render%)
  dest-dir : path-string?
  refer-to-existing-files : any/c = #f
  root-path : (or/c path-string? #f) = #f
  prefix-file : (or/c path-string? #f) = #f
  style-file : (or/c path-string? #f) = #f
  style-extra-files : (listof path-string?) = null
  extra-files : (listof path-string?) = null
Creates a renderer whose output will go to dest-dir. For example, dest-dir could name the directory containing the output Latex file, the HTML file for a single-file output, or the output sub-directory for multi-file HTML output.

If root-path is not #f, it is normally the same as dest-dir or a parent of dest-dir. It causes cross-reference information to record destination files relative to root-path; when cross-reference information is serialized, it can be deserialized via deserialize-info with a different root path (indicating that the destination files have moved).

The prefix-file, style-file, and style-extra-files arguments set files that control output styles in a formal-specific way; see Configuring Output for more information.

The extra-files argument names files to be copied to the output location, such as image files or extra configuration files.

(send a-render traverse srcs dests)  (and/c hash? immutable?)
  srcs : (listof part?)
  dests : (listof path-string?)
Performs the traverse pass, producing a hash table that contains the replacements for and traverse-blocks and traverse-elementss. See render for information on the dests argument.

(send a-render collect srcs dests fp)  collect-info?
  srcs : (listof part?)
  dests : (listof path-string?)
  fp : (and/c hash? immutable?)
Performs the collect pass. See render for information on the dests argument. The fp argument is a result from the traverse method.

(send a-render resolve srcs dests ci)  resolve-info?
  srcs : (listof part?)
  dests : (listof path-string?)
  ci : collect-info?
Performs the resolve pass. See render for information on the dests argument. The ci argument is a result from the collect method.

(send a-render render srcs dests ri)  void?
  srcs : (listof part?)
  dests : (listof path-string?)
  ri : resolve-info?
Produces the final output. The ri argument is a result from the render method.

The dests provide names of files for Latex or single-file HTML output, or names of sub-directories for multi-file HTML output. If the dests are relative, they’re relative to the current directory; normally, they should indicates a path within the dest-dir supplied on initialization of the render% object.

(send a-render serialize-info ri)  any/c
  ri : resolve-info?
Serializes the collected info in ri.

(send a-render deserialize-info v    
  ci    
  [#:root root-path])  void?
  v : any/c
  ci : collect-info?
  root-path : (or/c path-string? false/c) = #f
Adds the deserialized form of v to ci.

If root-path is not #f, then file paths that are recorded in ci as relative to an instantiation-supplied root-path are deserialized as relative instead to the given root-path.

(send a-render get-defined ci)  (listof tag?)
  ci : collect-info?
Returns a list of tags that were defined within the documents represented by ci.

(send a-render get-external ri)  (listof tag?)
  ri : resolve-info?
Returns a list of tags that were referenced but not defined within the documents represented by ri (though possibly found in cross-reference information transferred to ri via xref-transfer-info).

(send a-render get-undefined ri)  (listof tag?)
  ri : resolve-info?
Returns a list of tags that were referenced by the resolved documents with no target found either in the resolved documents represented by ri or cross-reference information transferred to ri via xref-transfer-info.

If multiple tags were referenced via resolve-search and a target was found for any of the tags using the same dependency key, then no tag in the set is included in the list of undefined tags.

7.4.3 Text Renderer

render-mixin : (class? . -> . class?)
  argument extends/implements: render%
Specializes a render% class for generating plain text.

7.4.4 HTML Renderer

render-mixin : (class? . -> . class?)
  argument extends/implements: render%
Specializes a render% class for generating HTML output.

(send a-render set-external-tag-path url)  void?
  url : string?
Configures the renderer to redirect links to external via url, adding a tag query element to the end of the URL that contains the Base64-encoded, printed, serialized original tag (in the sense of link-element) for the link.

(send a-render set-external-root-url url)  void?
  url : string?
Configures the renderer to redirect links to documents installed in the distribution’s documentation directory to the given URL, using the URL as a replacement to the path of the distribution’s document directory.

render-multi-mixin : (class? . -> . class?)
  argument extends/implements: render%
Further specializes a rendering class produced by render-mixin for generating multiple HTML files.

7.4.5 Latex Renderer

render-mixin : (class? . -> . class?)
  argument extends/implements: render%
Specializes a render% class for generating Latex input.

7.4.6 PDF Renderer

render-mixin : (class? . -> . class?)
  argument extends/implements: render%
Specializes a render% class for generating PDF output via Latex, building on render-mixin from scribble/latex-render.