+;;;; -*- Mode: LISP; Syntax: ANSI-Common-Lisp; Base: 10 -*-
+;;;; *************************************************************************
+;;;; FILE IDENTIFICATION
+;;;;
+;;;; Name: lml.cl
+;;;; Purpose: Lisp Markup Language functions
+;;;; Programmer: Kevin M. Rosenberg
+;;;; Date Started: Aug 2002
+;;;;
+;;;; $Id: lml.cl,v 1.1 2002/09/16 01:13:49 kevin Exp $
+;;;;
+;;;; This file, part of LML, is Copyright (c) 2002 by Kevin M. Rosenberg
+;;;;
+;;;; LML users are granted the rights to distribute and use this software
+;;;; as governed by the terms of the GNU General Public License v2
+;;;; (http://www.gnu.org/licenses/gpl.html)
+;;;; *************************************************************************
+
+(declaim (optimize (debug 3) (speed 3) (safety 1) (compilation-speed 0)))
+(in-package :lml)
+
+(defconstant +html4-prologue-string+
+ (format nil
+ "<!DOCTYPE HTML PUBLIC \"-//IETF//DTD HTML//EN\">~%"))
+
+(defconstant +xml-prologue-string+
+ (format nil
+ "<?xml version=\"1.0\" encoding=\"iso-8859-1\" standalone=\"yes\"?>~%"))
+
+(defconstant +xhtml-prologue-string+
+ (format nil
+ "<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Strict//EN\" \"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd\">~%"))
+
+(defvar *print-spaces* nil)
+(defvar *indent* 0)
+(defun reset-indent ()
+ (setq *indent* 0))
+
+(defun lml-print (str &rest args)
+ (when (streamp *html-output*)
+ (when *print-spaces* (indent-spaces *indent* *html-output*))
+ (if args
+ (apply #'format *html-output* str args)
+ (princ str *html-output*))
+ (when *print-spaces* (format *html-output* "~%"))
+ (values)))
+
+(defmacro lml-line (str &rest args)
+ `(lml-print ,str ,@args))
+
+(defun lml-print-date (date)
+ (lml-print (date-string date)))
+
+(defmacro lml-exec-body (&body forms)
+ `(progn
+ ,@(mapcar
+ #'(lambda (form)
+ (etypecase form
+ (string
+ `(lml-print ,form))
+ (number
+ `(lml-print "~D" ,form))
+ (symbol
+ `(lml-print (string-downcase (symbol-name ,form))))
+ (nil
+ nil)
+ (cons
+ form)))
+ forms)))
+
+(defmacro with-attr-string (tag attr-string &body body)
+ (let ((attr (gensym)))
+ `(let ((,attr ,attr-string))
+ (lml-print "<~(~A~)~A>" ',tag
+ (if (and (stringp ,attr) (plusp (length ,attr)))
+ (format nil "~A" ,attr)
+ ""))
+ (incf *indent*)
+ (lml-exec-body ,@body)
+ (decf *indent*)
+ (lml-print "</~(~A~)>" ',tag))))
+
+(defun one-keyarg-string (key value)
+ "Return attribute string for keys"
+ (format nil "~(~A~)=\"~A\"" key
+ (typecase value
+ (symbol
+ (string-downcase (symbol-name value)))
+ (string
+ value)
+ (t
+ (eval value)))))
+
+(defmacro with-keyargs (tag keyargs &body body)
+ (let ((attr (gensym))
+ (kv (gensym)))
+ `(progn
+ (let ((,attr '()))
+ (dolist (,kv ',keyargs)
+ (awhen (cadr ,kv)
+ (push (one-keyarg-string (car ,kv) it) ,attr)))
+ (with-attr-string ,tag (list-to-spaced-string (nreverse ,attr)) ,@body)))))
+
+(defmacro with (tag &rest args)
+ (let ((body '())
+ (keyargs '())
+ (n (length args)))
+ (do ((i 0 (1+ i)))
+ ((> i (1- n)))
+ (let ((arg (nth i args))
+ (value (when (< (1+ i) n)
+ (nth (1+ i) args))))
+ (if (keyword-symbol? arg)
+ (progn
+ (push (list arg value) keyargs)
+ (incf i))
+ (push arg body))))
+ `(with-keyargs ,tag ,keyargs ,@(nreverse body))))
+
+
+(defmacro keyargs-string (&rest args)
+ "Returns a string of attributes and values. Result contains a leading space."
+ (let ((keyarg-list '()))
+ (loop for ( name val ) on args by #'cddr
+ do
+ (when val
+ (push (one-keyarg-string name val) keyarg-list)))
+ (list-to-spaced-string (nreverse keyarg-list))))
+
+
+(defmacro xhtml-prologue ()
+ `(progn
+ (lml-print +xml-prologue-string+)
+ (lml-print +xhtml-prologue-string+)))
+
+(defmacro link (dest &body body)
+ `(with a :href ,dest ,@body))
+
+(defmacro link-c (class dest &body body)
+ `(with a :href ,dest :class ,class ,@body))
+
+(defmacro img (dest &key class id alt style width height align)
+ (let ((attr
+ (eval `(keyargs-string :class ,class :id ,id :alt ,alt :style ,style
+ :width ,width :height ,height :align ,align))))
+ `(lml-print ,(format nil "<img src=\"~A\"~A />" dest attr))))
+
+(defmacro input (&key name class id type style size maxlength value)
+ (let ((attr
+ (eval `(keyargs-string :name ,name :class ,class :id ,id :style ,style
+ :size ,size :maxlength ,maxlength :value ,value
+ :type ,type))))
+ `(lml-print ,(format nil "<input~A />" attr))))
+
+(defmacro meta (name content)
+ `(with meta :name ,name :content ,content))
+
+(defmacro meta-key (&key name content http-equiv)
+ `(with meta :name ,name :content ,content :http-equiv ,http-equiv))
+
+(defmacro br ()
+ `(lml-print "<br />"))
+
+(defmacro lml-tag-macro (tag)
+ `(progn
+ (defmacro ,tag (&body body)
+ `(with ,',tag ,@body))
+ (export ',tag)))
+
+(defmacro lml-tag-class-macro (tag)
+ (let ((name (intern (format nil "~A-~A" tag :c))))
+ `(progn
+ (defmacro ,name (&body body)
+ `(with ,',tag :class ,(car body) ,@(cdr body)))
+ (export ',name))))
+
+(eval-when (:compile-toplevel :load-toplevel :execute)
+ (defparameter *macro-list*
+ '(a div span h1 h2 h3 h4 h5 h6 i b p li ul ol table tbody td tr body head
+ html title pre tt u dl dt dd kbd code form))
+ (export '(link link-c br img input meta meta-key))
+ (export *macro-list*))
+
+(loop for i in *macro-list*
+ do
+ (eval `(lml-tag-macro ,i))
+ (eval `(lml-tag-class-macro ,i)))
+
+(defmacro print-page (title &body body)
+ `(html
+ (head
+ (title ,title))
+ (body ,@body)))
+
+(defmacro page (out-file &body body)
+ `(with-open-file (*html-output*
+ (lml-file-name ,out-file :output)
+ :direction :output
+ :if-exists :supersede)
+ (xhtml-prologue)
+ (html :xmlns "http://www.w3.org/1999/xhtml"
+ ,@body)))