On Dec 16, 2015, at 11:46 PM, tachlithavayati wrote:
> Hi Friends:
>
> With minlatex.rkt functions I can successfuly render HTML with LaTeX in
> one-page documents (directly from DrRacket or with Scribble --html). But for
> multi-page options, for example with Scribble --htmls, the render is
> something like:
>
> \[e^{i \pi}+1=0\]
>
> Question: Is there a way to render multi-page HTML with LaTeX code?
>
> Thank you in advance for any hint concerning this problem.
>
> Sincerely, Enrique Comer
>
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I am not sure what you mean with 'rendering latex with htmls'. I am writing
HtDP/2e with latex embedded and I use the equivalent of --htmls. The code is
below. When it is in 'latex' mode, I generate real latex math; when it is html
mode, it creates PDFs that are included.
#lang at-exp racket/gui
(provide
;; [#:file (f String)] String *-> ImageSnip
;; (latex s ..) runs latex on s ... and turns the result into an image snip
;; if #:file is specified it also saves a version of the image in a file
latex
;; -> Real
latex-scale
;; -> Boolean
in-latex-mode?)
;;
---
;; IMPLEMENTATION
(require scribble/core)
(define (in-latex-mode?)
(define v (map string->symbol (vector->list
(current-command-line-arguments
(member 'latex v))
(define (latex-scale)
(if (in-latex-mode?) 0.75 1.0))
(define (latex #:display [display-style #false] #:file (f "x") . strs)
(define math-delimiters (if display-style "$$" "$"))
(define the-math (string-append math-delimiters (string-append* strs)
math-delimiters))
(define x.tex (string-append f ".tex"))
(define x.pdf (string-append f ".pdf"))
(define x.png (string-append f ".png"))
(define cmd (regexp-replace #rx"\n+" (COMMANDS x.tex x.pdf x.png) " \\&\\& "))
(define latex/x (string->path "Latex/"))
(define in-latex-mode (in-latex-mode?))
(define (run)
(parameterize ([current-directory latex/x]
[current-input-port (open-input-bytes #"")]
[current-output-port (open-output-string)])
(call-with-output-file* x.tex #:exists 'truncate
(lambda (o) (fprintf o TEMPLATE the-math)))
(unless (system cmd)
(display (get-output-string (current-output-port)) (current-error-port))
(error 'latex "commands did not run successfully, see above output;
check convert"))
(begin0
(make-object image-snip% x.png 'png/mask)
#;
(rename-file-or-directory x.pdf (string-append "../" x.pdf) #t
; (define (cleanup) (delete-directory/files latex))
(if in-latex-mode
(exact the-math)
(dynamic-wind void run void)))
(define ((mk-latex-command n #:style [style '(exact-chars)]) . items)
(make-element (make-style n style) items))
; (define lpara (mk-latex-command "paragraph"))
(define exact (mk-latex-command #f))
(define TEMPLATE
@string-append{
\documentclass[preview]{standalone}
% \usepackage[mathletters]{ucs}
% \usepackage[utf8x]{inputenc}
\usepackage{amsmath}
\pagestyle{empty}
\begin{document}
~a
\end{document}})
(define (COMMANDS x.tex x.pdf x.png)
@string-append{
pdflatex @x.tex
convert -density 90 @x.pdf -quality 90 -transparent white -trim +repage
@x.png})
@;latex{\sum_{i=0}^{\infty}\lambda_i}
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