-;;;; markup.scm -- Implement a user extensible markup scheme.
+;;;; This file is part of LilyPond, the GNU music typesetter.
;;;;
-;;;; source file of the GNU LilyPond music typesetter
-;;;;
-;;;; (c) 2003--2006 Han-Wen Nienhuys <hanwen@xs4all.nl>
+;;;; Copyright (C) 2003--2010 Han-Wen Nienhuys <hanwen@xs4all.nl>
+;;;;
+;;;; LilyPond is free software: you can redistribute it and/or modify
+;;;; it under the terms of the GNU General Public License as published by
+;;;; the Free Software Foundation, either version 3 of the License, or
+;;;; (at your option) any later version.
+;;;;
+;;;; LilyPond is distributed in the hope that it will be useful,
+;;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+;;;; GNU General Public License for more details.
+;;;;
+;;;; You should have received a copy of the GNU General Public License
+;;;; along with LilyPond. If not, see <http://www.gnu.org/licenses/>.
"
Internally markup is stored as lists, whose head is a function.
print object).
-To add a builtin markup command, use the define-builtin-markup-command
-utility. In a user file, the define-markup-command macro shall be used
-(see ly/markup-init.ly).
+To add a markup command, use the define-markup-command utility.
(define-markup-command (mycommand layout prop arg1 ...) (arg1-type? ...)
\"my command usage and description\"
;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;; markup definer utilities
-(define-macro (define-builtin-markup-command command-and-args signature . body)
+;; For documentation purposes
+;; category -> markup functions
+(define-public markup-functions-by-category (make-hash-table 150))
+;; markup function -> used properties
+(define-public markup-functions-properties (make-weak-key-hash-table 151))
+;; List of markup list functions
+(define-public markup-list-functions (make-weak-key-hash-table 151))
+
+(use-modules (ice-9 optargs))
+
+(defmacro*-public define-markup-command
+ (command-and-args signature
+ #:key (category '()) (properties '())
+ #:rest body)
"
* Define a COMMAND-markup function after command-and-args and body,
register COMMAND-markup and its signature,
-* add COMMAND-markup to markup-function-list,
+* add COMMAND-markup to markup-functions-by-category,
* sets COMMAND-markup markup-signature and markup-keyword object properties,
* define a make-COMMAND-markup function.
Syntax:
- (define-builtin-markup-command (COMMAND layout props arg1 arg2 ...)
- (arg1-type? arg2-type? ...)
+ (define-markup-command (COMMAND layout props . arguments)
+ argument-types
+ [ #:category category ]
+ [ #:properties properties ]
\"documentation string\"
...command body...)
or:
- (define-builtin-markup-command COMMAND (arg1-type? arg2-type? ...)
- function)
+ (define-markup-command COMMAND
+ argument-types
+ [ #:category category ]
+ function)
+
+where:
+ argument-types is a list of type predicates for arguments
+ category is either a symbol or a symbol list
+ properties a list of (property default-value) lists or COMMANDx-markup elements
+ (when a COMMANDx-markup is found, the properties of the said commandx are
+ added instead). No check is performed against cyclical references!
+
+ The specified properties are available as let-bound variables in the
+ command body.
"
(let* ((command (if (pair? command-and-args) (car command-and-args) command-and-args))
(args (if (pair? command-and-args) (cdr command-and-args) '()))
(command-name (string->symbol (format #f "~a-markup" command)))
(make-markup-name (string->symbol (format #f "make-~a-markup" command))))
+ (while (and (pair? body) (keyword? (car body)))
+ (set! body (cddr body)))
`(begin
;; define the COMMAND-markup function
,(if (pair? args)
- `(define-public (,command-name ,@args)
- ,@body)
+ (let* ((documentation (if (string? (car body))
+ (list (car body))
+ '()))
+ (real-body (if (or (null? documentation)
+ (null? (cdr body)))
+ body (cdr body))))
+ `(define-public (,command-name ,@args)
+ ,@documentation
+ (let ,(filter identity
+ (map (lambda (prop-spec)
+ (if (pair? prop-spec)
+ (let ((prop (car prop-spec))
+ (default-value (if (null? (cdr prop-spec))
+ #f
+ (cadr prop-spec)))
+ (props (cadr args)))
+ `(,prop (chain-assoc-get ',prop ,props ,default-value)))
+ #f))
+ properties))
+ ,@real-body)))
+ (let ((args (gensym "args"))
+ (markup-command (car body)))
+ `(define-public (,command-name . ,args)
+ ,(format #f "Copy of the ~a command." markup-command)
+ (apply ,markup-command ,args))))
+ (set! (markup-command-signature ,command-name) (list ,@signature))
+ ;; Register the new function, for markup documentation
+ ,@(map (lambda (category)
+ `(hashq-set!
+ (or (hashq-ref markup-functions-by-category ',category)
+ (let ((hash (make-weak-key-hash-table 151)))
+ (hashq-set! markup-functions-by-category ',category
+ hash)
+ hash))
+ ,command-name #t))
+ (if (list? category) category (list category)))
+ ;; Used properties, for markup documentation
+ (hashq-set! markup-functions-properties
+ ,command-name
+ (list ,@(map (lambda (prop-spec)
+ (cond ((symbol? prop-spec)
+ prop-spec)
+ ((not (null? (cdr prop-spec)))
+ `(list ',(car prop-spec) ,(cadr prop-spec)))
+ (else
+ `(list ',(car prop-spec)))))
+ (if (pair? args)
+ properties
+ (list)))))
+ ;; define the make-COMMAND-markup function
+ (define-public (,make-markup-name . args)
+ (let ((sig (list ,@signature)))
+ (make-markup ,command-name ,(symbol->string make-markup-name) sig args))))))
+
+(defmacro*-public define-markup-list-command
+ (command-and-args signature #:key (properties '()) #:rest body)
+ "Same as `define-markup-command, but defines a command that, when
+interpreted, returns a list of stencils instead os a single one"
+ (let* ((command (if (pair? command-and-args) (car command-and-args) command-and-args))
+ (args (if (pair? command-and-args) (cdr command-and-args) '()))
+ (command-name (string->symbol (format #f "~a-markup-list" command)))
+ (make-markup-name (string->symbol (format #f "make-~a-markup-list" command))))
+ (while (and (pair? body) (keyword? (car body)))
+ (set! body (cddr body)))
+ `(begin
+ ;; define the COMMAND-markup-list function
+ ,(if (pair? args)
+ (let* ((documentation (if (string? (car body))
+ (list (car body))
+ '()))
+ (real-body (if (or (null? documentation)
+ (null? (cdr body)))
+ body (cdr body))))
+ `(define-public (,command-name ,@args)
+ ,@documentation
+ (let ,(filter identity
+ (map (lambda (prop-spec)
+ (if (pair? prop-spec)
+ (let ((prop (car prop-spec))
+ (default-value (if (null? (cdr prop-spec))
+ #f
+ (cadr prop-spec)))
+ (props (cadr args)))
+ `(,prop (chain-assoc-get ',prop ,props ,default-value)))
+ #f))
+ properties))
+ ,@real-body)))
(let ((args (gensym "args"))
(markup-command (car body)))
`(define-public (,command-name . ,args)
,(format #f "Copy of the ~a command." markup-command)
(apply ,markup-command ,args))))
(set! (markup-command-signature ,command-name) (list ,@signature))
- ;; add the command to markup-function-list, for markup documentation
- (if (not (member ,command-name markup-function-list))
- (set! markup-function-list (cons ,command-name markup-function-list)))
- ;; define the make-COMMAND-markup function
+ ;; add the command to markup-list-function-list, for markup documentation
+ (hashq-set! markup-list-functions ,command-name #t)
+ ;; Used properties, for markup documentation
+ (hashq-set! markup-functions-properties
+ ,command-name
+ (list ,@(map (lambda (prop-spec)
+ (cond ((symbol? prop-spec)
+ prop-spec)
+ ((not (null? (cdr prop-spec)))
+ `(list ',(car prop-spec) ,(cadr prop-spec)))
+ (else
+ `(list ',(car prop-spec)))))
+ (if (pair? args)
+ properties
+ (list)))))
+ ;; it's a markup-list command:
+ (set-object-property! ,command-name 'markup-list-command #t)
+ ;; define the make-COMMAND-markup-list function
(define-public (,make-markup-name . args)
(let ((sig (list ,@signature)))
- (make-markup ,command-name ,(symbol->string make-markup-name) sig args))))))
+ (list (make-markup ,command-name
+ ,(symbol->string make-markup-name) sig args)))))))
(define-public (make-markup markup-function make-name signature args)
" Construct a markup object from MARKUP-FUNCTION and ARGS. Typecheck
(ly:error
(string-append
make-name ": "
- (_ "Invalid argument in position ~A. Expect: ~A, found: ~S.")
- error-msg))
+ (_ "Invalid argument in position ~A. Expect: ~A, found: ~S."))
+ (car error-msg) (cadr error-msg)(caddr error-msg))
(cons markup-function args))))
;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;; markup constructors
;;; lilypond-like syntax for markup construction in scheme.
-(use-modules (ice-9 optargs)
- (ice-9 receive))
+(use-modules (ice-9 receive))
(defmacro*-public markup (#:rest body)
"The `markup' macro provides a lilypond-like syntax for building markups.
(cond ((and (pair? expr)
(keyword? (car expr)))
;; expr === (#:COMMAND arg1 ...)
- (let* ((command (symbol->string (keyword->symbol (car expr))))
- (sig (markup-command-signature
- (car (lookup-markup-command command))))
- (sig-len (length sig)))
- (do ((i 0 (1+ i))
- (args '() args)
- (rest (cdr expr) rest))
- ((>= i sig-len)
- (values (cons (keyword->make-markup (car expr)) (reverse args)) rest))
- (cond ((eqv? (list-ref sig i) markup-list?)
- ;; (car rest) is a markup list
- (set! args (cons `(list ,@(compile-all-markup-expressions (car rest))) args))
- (set! rest (cdr rest)))
- (else
- ;; pick up one arg in `rest'
- (receive (a r) (compile-markup-arg rest)
- (set! args (cons a args))
- (set! rest r)))))))
+ (let ((command (symbol->string (keyword->symbol (car expr)))))
+ (if (not (pair? (lookup-markup-command command)))
+ (ly:error (_ "Not a markup command: ~A") command))
+ (let* ((sig (markup-command-signature
+ (car (lookup-markup-command command))))
+ (sig-len (length sig)))
+ (do ((i 0 (1+ i))
+ (args '() args)
+ (rest (cdr expr) rest))
+ ((>= i sig-len)
+ (values (cons (keyword->make-markup (car expr)) (reverse args)) rest))
+ (cond ((eqv? (list-ref sig i) markup-list?)
+ ;; (car rest) is a markup list
+ (set! args (cons `(list ,@(compile-all-markup-expressions (car rest))) args))
+ (set! rest (cdr rest)))
+ (else
+ ;; pick up one arg in `rest'
+ (receive (a r) (compile-markup-arg rest)
+ (set! args (cons a args))
+ (set! rest r))))))))
((and (pair? expr)
(pair? (car expr))
(keyword? (caar expr)))
(make-procedure-with-setter markup-command-signature-ref
markup-command-signature-set!))
-;; For documentation purposes
-(define-public markup-function-list (list))
-
(define-public (markup-signature-to-keyword sig)
" (A B C) -> a0-b1-c2 "
(if (null? sig)
sig)
"-"))))
-(define-public (lookup-markup-command code)
+(define (lookup-markup-command-aux symbol)
(let ((proc (catch 'misc-error
(lambda ()
- (module-ref (current-module)
- (string->symbol (format #f "~a-markup" code))))
+ (module-ref (current-module) symbol))
(lambda (key . args) #f))))
- (and (procedure? proc)
- (cons proc (markup-command-keyword proc)))))
+ (and (procedure? proc) proc)))
+
+(define-public (lookup-markup-command code)
+ (let ((proc (lookup-markup-command-aux
+ (string->symbol (format #f "~a-markup" code)))))
+ (and proc (markup-function? proc)
+ (cons proc (markup-command-keyword proc)))))
+
+(define-public (lookup-markup-list-command code)
+ (let ((proc (lookup-markup-command-aux
+ (string->symbol (format #f "~a-markup-list" code)))))
+ (and proc (markup-list-function? proc)
+ (cons proc (markup-command-keyword proc)))))
;;;;;;;;;;;;;;;;;;;;;;
;;; used in parser.yy to map a list of markup commands on markup arguments
;;; markup type predicates
(define (markup-function? x)
- (not (not (markup-command-signature x))))
+ (and (markup-command-signature x)
+ (not (object-property x 'markup-list-command))))
+
+(define (markup-list-function? x)
+ (and (markup-command-signature x)
+ (object-property x 'markup-list-command)))
+
+(define-public (markup-command-list? x)
+ "Determine if `x' is a markup command list, ie. a list composed of
+a markup list function and its arguments."
+ (and (pair? x) (markup-list-function? (car x))))
(define-public (markup-list? arg)
+ "Return a true value if `x' is a list of markups or markup command lists."
(define (markup-list-inner? lst)
(or (null? lst)
- (and (markup? (car lst)) (markup-list-inner? (cdr lst)))))
- (and (list? arg) (markup-list-inner? arg)))
+ (and (or (markup? (car lst)) (markup-command-list? (car lst)))
+ (markup-list-inner? (cdr lst)))))
+ (not (not (and (list? arg) (markup-list-inner? arg)))))
(define (markup-argument-list? signature arguments)
"Typecheck argument list."
(define-public interpret-markup ly:text-interface::interpret-markup)
+
+(define-public (interpret-markup-list layout props markup-list)
+ (let ((stencils (list)))
+ (for-each (lambda (m)
+ (set! stencils
+ (if (markup-command-list? m)
+ (append! (reverse! (apply (car m) layout props (cdr m)))
+ stencils)
+ (cons (interpret-markup layout props m) stencils))))
+ markup-list)
+ (reverse! stencils)))
+
(define-public (prepend-alist-chain key val chain)
(cons (acons key val (car chain)) (cdr chain)))