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@ -21,33 +21,7 @@ file and see how they affect the output.
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We could avoid the next @racket[require] if we were using @|lang| @racketmodname[racket], because these libraries would
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already be available.
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@chunk[<*>
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<req>
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<req2>
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<provides>
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<dev-mode>
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<values>
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<link>
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<buy-book-link>
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<image>
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<div-scale>
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<font-scale>
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<home-image>
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<home-overlay>
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<glyph>
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<image-wrapped>
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<detect-list-items>
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<make-list-function>
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<bullet-list>
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<numbered-list>
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<btw>
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<xref>
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<target->url>
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<xref-font>
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<define-heading>
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<headings>
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<define-heading-from-metas>
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]
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@chunk[<req>
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(require
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@ -670,40 +644,40 @@ Macro for defining a function that makes a heading by relying on data in the met
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#'(define (heading-from-metas metas)
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(heading-name (hash-ref metas meta-key-for-page-title))))]))]
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@;|{
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@deftogether[(
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@defproc[
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(topic-from-metas [metas hash?])
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txexpr?]
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@defproc[
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(section-from-metas [metas hash?])
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txexpr?]
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@defproc[
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(chapter-from-metas [metas hash?])
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txexpr?])]
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(define-heading-from-metas topic)
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@chunk[<headings-from-metas>
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(define-heading-from-metas topic)
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(define-heading-from-metas section)
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(define-heading-from-metas chapter)
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(define-heading-from-metas chapter)]
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(module+ test
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(let ([my-fake-metas (hash 'title "Fake Title" 'white "noise")])
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(check-txexprs-equal? ◊topic-from-metas[my-fake-metas]
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'(h3 ((class "topic")) "Fake Title"))
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(check-txexprs-equal? ◊section-from-metas[my-fake-metas]
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'(h2 ((class "section")) "Fake Title"))
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(check-txexprs-equal? ◊chapter-from-metas[my-fake-metas]
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'(h1 ((class "chapter")) "Fake Title"))))
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#|
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@racket[hanging-topic]: convert a topic + subhead into one HTML markup unit
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◊hanging-topic["Topic name"]{One-line explanation}
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@defproc[
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(hanging-topic
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[topic-xexpr xexpr?]
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[pollen-args (listof xexpr?)] ...)
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txexpr?]
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Convert a topic + subhead into one HTML markup unit
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|#
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(define (hanging-topic topic-xexpr . text-args)
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@chunk[<hanging-topic>
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(define (hanging-topic topic-xexpr . pollen-args)
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(txexpr 'div (list '(class "hanging-topic") no-hyphens-attr)
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(list topic-xexpr (list* 'p (list no-hyphens-attr) text-args))))
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(module+ test
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(check-txexprs-equal? ◊hanging-topic["Topic name"]{One-line explanation}
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`(div ((class "hanging-topic") ,no-hyphens-attr) "Topic name"
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(p (,no-hyphens-attr) "One-line explanation"))))
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(list topic-xexpr (list* 'p (list no-hyphens-attr) pollen-args))))]
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#|
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@racket[quick-table]: make little HTML tables with simplified notation
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@defproc[
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(quick-table
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[table-rows (listof xexpr?)] ...)
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txexpr?]
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Make an HTML table using simplified notation
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◊quick-table{heading left | heading center | heading right
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upper left | upper center | upper right
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@ -720,8 +694,8 @@ Macro for defining a function that makes a heading by relying on data in the met
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This function assumes that each row has the same number of columns.
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You could improve it to fill in blank cells in rows that need them.
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|#
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@chunk[<quick-table>
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(define (quick-table . text-args)
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;; In Pollen, a multiline text-args block arrives as a list of lines and linebreak characters.
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@ -757,19 +731,13 @@ Macro for defining a function that makes a heading by relying on data in the met
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;; Converts an expression of the form @racket[(apply func (list arg1 arg2 ...))]
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;; Into @racket[(func arg1 arg2 ...)]
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(cons 'table (for/list ([html-row (in-list html-rows)])
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(apply tr-tag html-row))))
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(module+ test
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(check-txexprs-equal?
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◊(quick-table "heading-one | heading-two" "\n"
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" three | four" "\n"
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"five | six ")
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'(table (tr (th "heading-one") (th "heading-two"))
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(tr (td "three") (td "four"))
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(tr (td "five") (td "six")))))
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(apply tr-tag html-row))))]
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#|
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@racket[pdf-thumbnail-link]: create a thumbnail of a PDF that links to the PDF
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@defproc[
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(pdf-thumbnail
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[pdf-path path-string?])
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txexpr?]
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Create a thumbnail of a PDF that links to the PDF.
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This function will only work properly if you have @racket[sips] on your system
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(command-line image-processing program, included with OS X).
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@ -781,23 +749,36 @@ Macro for defining a function that makes a heading by relying on data in the met
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though you could put in some logic to avoid this (e.g., check the modification date of the PDF).
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In this case, @racket[sips] is fast enough that it's not bothersome.
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|#
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(define (pdf-thumbnail-link pdf-pathstring)
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@chunk[<pdf-thumbnail>
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(define (pdf-thumbnail-link pdf-pathstring)
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(define img-extension "gif")
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(define img-pathstring (->string (add-ext (remove-ext pdf-pathstring) img-extension)))
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(define sips-command
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(format "sips -Z 2000 -s format ~a --out '~a' '~a' > /dev/null"
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img-extension img-pathstring pdf-pathstring))
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◊link[pdf-pathstring]{◊(if (system sips-command)
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(link pdf-pathstring (if (system sips-command)
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`(img ((src ,img-pathstring)))
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;; usually one would raise an error on the next line,
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;; but for instructional purposes, we'll have a graceful fail
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"sips not available")})
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"sips not available")))]
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@deftogether[(
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@defproc[
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(pdf-thumbnail-link-from-metas
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[metas hash?])
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txexpr?]
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@defproc[
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(before-and-after-pdfs
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[base-name string?])
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txexpr?]
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@defproc[
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(alternate-after-pdf
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[base-name string?])
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txexpr?]
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)]
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A few convenience variants of @racket[pdf-thumbnail-link]
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#|
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A few convenience variants of @racket[pdf-thumbnail-link]
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|#
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@chunk[<pdf-thumbnail-variants>
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(define (pdf-thumbnail-link-from-metas metas)
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(define-values (dir fn _) (split-path (add-ext (remove-ext* (hash-ref metas 'here-path)) "pdf")))
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(pdf-thumbnail-link (->string fn)))
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@ -814,11 +795,13 @@ Macro for defining a function that makes a heading by relying on data in the met
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(define (alternate-after-pdf base-name)
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`(div ((class "pdf-thumbnail"))
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"after (alternate)" (br)
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,(pdf-thumbnail-link (format "pdf/sample-doc-~a-after-alternate.pdf" base-name))))
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,(pdf-thumbnail-link (format "pdf/sample-doc-~a-after-alternate.pdf" base-name))))]
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#|
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@racket[root]: decode page content
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@defproc[
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(root
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[pollen-args (listof txexpr?)] ...)
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txexpr?]
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Decode page content
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In a Pollen markup source, the output is a tagged X-expression that starts with @racket[root]:
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@ -834,7 +817,7 @@ Macro for defining a function that makes a heading by relying on data in the met
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Often, you'll want to use a @racket[decode] function, which can recursively perform different kinds of
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processing on different types of page elements.
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|#
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@chunk[<root>
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(define (root . elems)
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;; We will do the decoding in two steps.
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;; Detect paragraphs first so that they're treated as block-txexprs in next phase.
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@ -846,11 +829,15 @@ Macro for defining a function that makes a heading by relying on data in the met
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#:string-proc (compose1 make-quotes-hangable
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fix-em-dashes
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smart-quotes)
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#:exclude-tags '(style script))))
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#:exclude-tags '(style script))))]
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#|
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@racket[hyphenate-block]: helper function for root decoder
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|#
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@defproc[
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(hyphenate-block
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[block-tx txexpr?])
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txexpr?]
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Helper function for root decoder
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@chunk[<hyphenate-block>
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(define (hyphenate-block block-tx)
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;; The basic @racket[hyphenate] function comes from the @racket[hyphenate] module.
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;; We could attach @racket[hyphenate] to our decoder as a string processor rather than block processor.
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@ -862,21 +849,21 @@ Macro for defining a function that makes a heading by relying on data in the met
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(hyphenate block-tx
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#:min-left-length 3
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#:min-right-length 3
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#:omit-txexpr no-hyphens?))
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(module+ test
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(check-txexprs-equal? (hyphenate-block `(div "snowman" (span (,no-hyphens-attr) "snowman")))
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`(div "snow\u00ADman" (span (,no-hyphens-attr) "snowman"))))
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#:omit-txexpr no-hyphens?))]
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#|
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@racket[make-quotes-hangable]: perform tricky processing on quotation marks.
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@defproc[
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(make-quotes-hangable
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[str string?])
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txexpr?]
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Perform tricky processing on quotation marks.
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Because I'm a typography snob I like to push quotation marks into the margin a little bit
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when they appear at the left edge of a line (aka "hanging quotes").
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This function just wraps left-hand quote marks in two little tags ("push" and "pull")
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that I can then manipulate in CSS to get the effect.
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|#
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@chunk[<make-quotes-hangable>
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(define (make-quotes-hangable str)
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;; using @racket[regexp-match*] with #:gap-select? makes it act like a funny kind of string splitter
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(define substrs (regexp-match* #px"\\s?[“‘]" str #:gap-select? #t))
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@ -889,41 +876,39 @@ Macro for defining a function that makes a heading by relying on data in the met
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[("‘") (list '(squo-push) `(squo-pull ,str))]
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[("“") (list '(dquo-push) `(dquo-pull ,str))]
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[else (list str)])
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(list str)))) substrs))))
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(module+ test
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|
(check-txexprs-equal? (make-quotes-hangable "“Who is it?”")
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|
'(quo "" (dquo-push) (dquo-pull "“") "Who is it?”")))
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(list str)))) substrs))))]
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#|
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|
@racket[fix-em-dashes]: helper function for root decoder
|
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|
|
@defproc[
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|
|
(fix-em-dashes
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[str string?])
|
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txexpr?]
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|
Helper function for root decoder
|
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When I type an em dash in my sources, I will often leave a space around it,
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but I don't want spaces in the output, so this function removes them.
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|
|
|#
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|
|
(define (fix-em-dashes str)
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|
@chunk[<fix-em-dashes>
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|
|
(define (fix-em-dashes str)
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|
|
;; \u00A0 = nbsp, \u2009 = thinsp (neither included in \s)
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|
(let* ([str (regexp-replace* #px"(?<=\\w)[\u00A0\u2009\\s]—" str "—")]
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[str (regexp-replace* #px"—[\u00A0\u2009\\s](?=\\w)" str "—")])
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str))
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str))]
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|
(module+ test
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|
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|
|
(check-equal? (fix-em-dashes "Hey — you!") "Hey—you!")
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|
|
(check-equal? (fix-em-dashes "Hey—you!") "Hey—you!"))
|
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|
|
@defproc[
|
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|
|
(capitalize-first-letter
|
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|
|
[str string?])
|
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|
string?]
|
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|
|
|
utility function for use in HTML templates.
|
|
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#|
|
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|
|
@racket[capitalize-first-letter]: utility function for use in HTML templates.
|
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|#
|
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|
|
@chunk[<capitalize-first-letter>
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|
|
(define (capitalize-first-letter str)
|
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(regexp-replace #rx"^." str string-upcase))
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(regexp-replace #rx"^." str string-upcase))]
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(module+ test
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(check-equal? (capitalize-first-letter "foo dog") "Foo dog"))
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@subsubsection{Miscellaneous tag functions}
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Presented without docs or comment, as it should be obvious at this point what they do.
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#|
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Miscellaneous tag functions. Obvious at this point what they do.
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|#
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@chunk[<misc-functions>
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(define omission (make-default-tag-function 'div #:class "omission"))
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(define mono (make-default-tag-function 'span #:class "mono"))
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@ -953,6 +938,51 @@ Macro for defining a function that makes a heading by relying on data in the met
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(define (captioned name . xs)
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`(table ((class "captioned indented"))
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(tr (td ((style "text-align:left")) ,@xs) (td ,(caption name)))))
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(tr (td ((style "text-align:left")) ,@xs) (td ,(caption name)))))]
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@;|{
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#|
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|#
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}|
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@chunk[<*>
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<req>
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<req2>
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<provides>
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<dev-mode>
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<values>
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<link>
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<buy-book-link>
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<image>
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<div-scale>
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<font-scale>
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<home-image>
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<home-overlay>
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<glyph>
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<image-wrapped>
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<detect-list-items>
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<make-list-function>
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<bullet-list>
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<numbered-list>
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<btw>
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<xref>
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<target->url>
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<xref-font>
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<define-heading>
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<headings>
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<define-heading-from-metas>
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<headings-from-metas>
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<hanging-topic>
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<quick-table>
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<pdf-thumbnail>
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<pdf-thumbnail-variants>
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<root>
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<hyphenate-block>
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<make-quotes-hangable>
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<fix-em-dashes>
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<capitalize-first-letter>
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<misc-functions>
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]
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