162 lines
4.7 KiB
Racket
162 lines
4.7 KiB
Racket
#lang scribble/doc
|
|
@(require scribble/manual
|
|
"utils.ss")
|
|
|
|
@title[#:tag "decode"]{Decoding Text}
|
|
|
|
@defmodule[scribble/decode]{The @schememodname[scribble/decode]
|
|
library helps you write document content in a natural way---more like
|
|
plain text, except for @litchar["@"] escapes. Roughly, it processes a
|
|
stream of strings to produces instances of the
|
|
@schememodname[scribble/struct] datatypes (see @secref["struct"]).}
|
|
|
|
At the @tech{flow} level, decoding recognizes a blank line as a
|
|
@tech{paragraph} separator. At the @tech{paragraph}-content level,
|
|
decoding makes just a few special text conversions:
|
|
|
|
@itemize{
|
|
|
|
@item{@litchar{---}: converted to @scheme['mdash], which the HTML render
|
|
outputs as an en-dash surrounded by space (so don't put spaces around
|
|
@litchar{---} in a document)}
|
|
|
|
@item{@litchar{--}: converted to @scheme['ndash]}
|
|
|
|
@item{@litchar{``}: converted to @scheme['ldquo], which is fancy open quotes: ``}
|
|
|
|
@item{@litchar{''}: converted to @scheme['rdquo], which is fancy closing quotes: ''}
|
|
|
|
@item{@litchar{'}: converted to @scheme['rsquo], which is a fancy apostrophe: '}
|
|
|
|
}
|
|
|
|
Some functions @deftech{decode} a sequence of @scheme[_pre-flow] or
|
|
@scheme[_pre-content] arguments using @scheme[decode-flow] or
|
|
@scheme[decode-content], respectively. For example, the @scheme[bold]
|
|
function accepts any number of @scheme[_pre-content] arguments, so
|
|
that in
|
|
|
|
@verbatim[#:indent 2]|{@bold{``apple''}}|
|
|
|
|
the @litchar{``apple''} argument is decoded to use fancy quotes, and
|
|
then it is bolded.
|
|
|
|
@defproc[(decode [lst list?]) part?]{
|
|
|
|
Decodes a document, producing a part. In @scheme[lst], instances of
|
|
@scheme[splice] are inlined into the list. An instance of
|
|
@scheme[title-decl] supplies the title for the part, plus tag, style
|
|
and version information. Instances of @scheme[part-index-decl] (that
|
|
precede any sub-part) add index entries that point to the
|
|
section. Instances of @scheme[part-collect-decl] add elements to the
|
|
part that are used only during the @techlink{collect pass}. Instances
|
|
of @scheme[part-tag-decl] add hyperlink tags to the section
|
|
title. Instances of @scheme[part-start] at level 0 trigger sub-part
|
|
parsing. Instances of @scheme[section] trigger are used as-is as
|
|
subsections, and instances of @scheme[paragraph] and other
|
|
flow-element datatypes are used as-is in the enclosing flow.
|
|
|
|
}
|
|
|
|
@defproc[(decode-part [lst list?]
|
|
[tags (listof string?)]
|
|
[title (or/c false/c list?)]
|
|
[depth excat-nonnegative-integer?])
|
|
part?]{
|
|
|
|
Like @scheme[decode], but given a list of tag string for the part, a
|
|
title (if @scheme[#f], then a @scheme[title-decl] instance is used if
|
|
found), and a depth for @scheme[part-start]s to trigger sub-part
|
|
parsing.
|
|
|
|
}
|
|
|
|
@defproc[(decode-flow [lst list?]) (listof flow-element?)]{
|
|
|
|
Decodes a flow. A sequence of two or more newlines separated only by
|
|
whitespace counts is parsed as a paragraph separator. In @scheme[lst],
|
|
instances of @scheme[splice] are inlined into the list. Instances of
|
|
@scheme[paragraph] and other flow-element datatypes are used as-is in
|
|
the enclosing flow.
|
|
|
|
}
|
|
|
|
@defproc[(decode-paragraph [lst list?]) paragraph?]{
|
|
|
|
Decodes a paragraph.
|
|
|
|
}
|
|
|
|
@defproc[(decode-content [lst list?]) list?]{
|
|
|
|
Decodes a sequence of elements.
|
|
|
|
}
|
|
|
|
@defproc[(decode-elements [lst list?]) list?]{
|
|
|
|
An alias for @scheme[decode-content].
|
|
}
|
|
|
|
@defproc[(decode-string [s string?]) list?]{
|
|
|
|
Decodes a single string to produce a list of elements.
|
|
|
|
}
|
|
|
|
@defproc[(whitespace? [s string?]) boolean?]{
|
|
|
|
Returns @scheme[#t] if @scheme[s] contains only whitespace, @scheme[#f]
|
|
otherwise.
|
|
|
|
}
|
|
|
|
@defstruct[title-decl ([tag-prefix (or/c false/c string?)]
|
|
[tags (listof string?)]
|
|
[version (or/c string? false/c)]
|
|
[style any/c]
|
|
[content list?])]{
|
|
|
|
See @scheme[decode] and @scheme[decode-part]. The @scheme[tag-prefix]
|
|
and @scheme[style] fields are propagated to the resulting
|
|
@scheme[part].
|
|
|
|
}
|
|
|
|
@defstruct[part-start ([depth integer?]
|
|
[tag-prefix (or/c false/c string?)]
|
|
[tags (listof string?)]
|
|
[style any/c]
|
|
[title list?])]{
|
|
|
|
Like @scheme[title-decl], but for a sub-part. See @scheme[decode] and
|
|
@scheme[decode-part].
|
|
|
|
}
|
|
|
|
@defstruct[part-index-decl ([plain-seq (listof string?)]
|
|
[entry-seq list?])]{
|
|
|
|
See @scheme[decode]. The two fields are as for @scheme[index-element].
|
|
|
|
}
|
|
|
|
@defstruct[part-collect-decl ([element element?])]{
|
|
|
|
See @scheme[decode].
|
|
|
|
}
|
|
|
|
@defstruct[part-tag-decl ([tag tag?])]{
|
|
|
|
See @scheme[decode].
|
|
|
|
}
|
|
|
|
@defstruct[splice ([run list?])]{
|
|
|
|
See @scheme[decode], @scheme[decode-part], and @scheme[decode-flow].
|
|
|
|
}
|
|
|