X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=scm%2Flily.scm;h=565a5e3c696526e188d6c42f0e1a7b7e70c46f1a;hb=0fcd8c283c45644a92d2308f1cd0d82a1e63380b;hp=a733a9f2e61204adc84dfda9f896da0b446fa34d;hpb=43d1c731756070519bb1229b30c7a83f275e2c6e;p=lilypond.git

diff --git a/scm/lily.scm b/scm/lily.scm
index a733a9f2e6..565a5e3c69 100644
--- a/scm/lily.scm
+++ b/scm/lily.scm
@@ -1,26 +1,32 @@
-;;;; lily.scm -- implement Scheme output routines for TeX and PostScript
+;;;; lily.scm -- toplevel Scheme stuff
 ;;;;
 ;;;;  source file of the GNU LilyPond music typesetter
 ;;;; 
-;;;; (c)  1998--2004 Jan Nieuwenhuizen <janneke@gnu.org>
+;;;; (c) 1998--2005 Jan Nieuwenhuizen <janneke@gnu.org>
 ;;;; Han-Wen Nienhuys <hanwen@cs.uu.nl>
 
-;;; Library functions
-
 
 (if (defined? 'set-debug-cell-accesses!)
     (set-debug-cell-accesses! #f))
 
-;(set-debug-cell-accesses! 5000)
+;(set-debug-cell-accesses! 1000)
 
 (use-modules (ice-9 regex)
 	     (ice-9 safe)
+             (ice-9 optargs)
 	     (oop goops)
-	     (srfi srfi-1)  ; lists
-	     (srfi srfi-13)) ; strings
+	     (srfi srfi-1)
+	     (srfi srfi-13)
+	     (srfi srfi-14))
+
 
+;; my display
 (define-public (myd k v) (display k) (display ": ") (display v) (display ", "))
 
+(define-public (print . args)
+  (apply format (cons (current-output-port) args)))
+
+
 ;;; General settings
 ;;; debugging evaluator is slower.  This should
 ;;; have a more sensible default.
@@ -31,16 +37,14 @@
       (debug-enable 'backtrace)
       (read-enable 'positions)))
 
-(define-public (line-column-location file line col)
-  "Print an input location, including column number ."
-  (string-append (number->string line) ":"
-		 (number->string col) " " file))
-
-(define-public (line-location  file line col)
-  "Print an input location, without column number ."
-  (string-append (number->string line) " " file))
+;; initialize defaults. 
+(ly:set-option 'command-line-settings
+	       '((resolution . 90)
+		 (preview-include-book-title . #t)
+		 ))
 
-(define-public point-and-click #f)
+(define-public tex-backend?
+  (member (ly:output-backend) '("texstr" "tex")))
 
 (define-public parser #f)
 
@@ -49,7 +53,7 @@
    (map (lambda (x) (if (symbol? x)
 			(symbol->string x)
 			(number->string x)))
-		(ly:version))
+	(ly:version))
    "."))
 
 
@@ -58,332 +62,85 @@
 (define ifdef "First run this through cpp.")
 (define ifndef "First run this through cpp.")
 
-;; gettext wrapper
-(define-public _ ly:gettext)
-
-;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-
-(define-public X 0)
-(define-public Y 1)
-(define-public START -1)
-(define-public STOP 1)
-(define-public LEFT -1)
-(define-public RIGHT 1)
-(define-public UP 1)
-(define-public DOWN -1)
-(define-public CENTER 0)
-
-(define-public DOUBLE-FLAT -4)
-(define-public THREE-Q-FLAT -3)
-(define-public FLAT -2)
-(define-public SEMI-FLAT -1)
-(define-public NATURAL 0)
-(define-public SEMI-SHARP 1)
-(define-public SHARP 2)
-(define-public THREE-Q-SHARP 3)
-(define-public DOUBLE-SHARP 4)
-(define-public SEMI-TONE 2)
-
-(define-public ZERO-MOMENT (ly:make-moment 0 1)) 
-
-(define-public (moment-min a b)
-  (if (ly:moment<? a b) a b))
-
-;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-;; lily specific variables.
-
-(define-public default-script-alist '())
-
-
-;; parser stuff.
-(define-public (print-music-as-book parser music)
-  (let* ((head  (ly:parser-lookup parser '$globalheader))
-	 (book (ly:make-book (ly:parser-lookup parser $defaultbookpaper)
-			     head score)))
-    (ly:parser-print-book parser book)))
-
-(define-public (print-score-as-book parser score)
-  (let*
-      ((head  (ly:parser-lookup parser '$globalheader))
-       (book (ly:make-book (ly:parser-lookup parser $defaultbookpaper)
-			   head score)))
-    (ly:parser-print-book parser book)))
-
-(define-public (print-score parser score)
-  (let* ((head  (ly:parser-lookup parser '$globalheader))
-	 (book (ly:make-book (ly:parser-lookup parser $defaultbookpaper)
-			     head score)))
-    (ly:parser-print-score parser book)))
-		
-(define-public (collect-scores-for-book  parser score)
-  (let*
-      ((oldval (ly:parser-lookup parser 'toplevel-scores)))
-    (ly:parser-define parser 'toplevel-scores (cons score oldval))
-    ))
-
-(define-public (collect-music-for-book parser music)
-  (collect-scores-for-book parser (ly:music-scorify music)))
-
-
-  
-;;;;;;;;;;;;;;;;
-; alist
-(define-public (assoc-get key alist . default)
-  "Return value if KEY in ALIST, else DEFAULT (or #f if not specified)."
-  (let ((entry (assoc key alist)))
-    (if (pair? entry)
-	(cdr entry)
-	(if (pair? default) (car default) #f))))
-
-(define-public (uniqued-alist alist acc)
-  (if (null? alist) acc
-      (if (assoc (caar alist) acc)
-	  (uniqued-alist (cdr alist) acc)
-	  (uniqued-alist (cdr alist) (cons (car alist) acc)))))
-
-(define-public (alist<? x y)
-  (string<? (symbol->string (car x))
-	    (symbol->string (car y))))
-
-(define-public (chain-assoc x alist-list)
-  (if (null? alist-list)
-      #f
-      (let* ((handle (assoc x (car alist-list))))
-	(if (pair? handle)
-	    handle
-	    (chain-assoc x (cdr alist-list))))))
-
-(define-public (chain-assoc-get x alist-list . default)
-  "Return ALIST entry for X. Return DEFAULT (optional, else #f) if not
-found."
-
-  (define (helper x alist-list default)
-    (if (null? alist-list)
-	default
-	(let* ((handle (assoc x (car alist-list))))
-	  (if (pair? handle)
-	      (cdr handle)
-	      (helper x (cdr alist-list) default)))))
-
-  (helper x alist-list
-	  (if (pair? default) (car default) #f)))
-
-(define (map-alist-vals func list)
-  "map FUNC over the vals of  LIST, leaving the keys."
-  (if (null?  list)
-      '()
-      (cons (cons  (caar list) (func (cdar list)))
-	    (map-alist-vals func (cdr list)))
-      ))
-
-(define (map-alist-keys func list)
-  "map FUNC over the keys of an alist LIST, leaving the vals. "
-  (if (null?  list)
-      '()
-      (cons (cons (func (caar list)) (cdar list))
-	    (map-alist-keys func (cdr list)))
-      ))
- 
-;;;;;;;;;;;;;;;;
-;; hash
-
-
-
-(if (not (defined? 'hash-table?))	; guile 1.6 compat
-    (begin
-      (define hash-table? vector?)
-
-      (define-public (hash-table->alist t)
-	"Convert table t to list"
-	(apply append
-	       (vector->list t)
-	       )))
-
-    ;; native hashtabs.
-    (begin
-      (define-public (hash-table->alist t)
-
-	(hash-fold (lambda (k v acc) (acons  k v  acc))
-		   '() t)
-	)
-      ))
-
-;; todo: code dup with C++. 
-(define-public (alist->hash-table l)
-  "Convert alist to table"
-  (let
-      ((m (make-hash-table (length l))))
-
-    (map (lambda (k-v)
-	   (hashq-set! m (car k-v) (cdr k-v)))
-	 l)
-
-    m))
-       
-
-
-;;;;;;;;;;;;;;;;
-; list
-
-(define (flatten-list lst)
-  "Unnest LST" 
-  (if (null? lst)
-      '()
-      (if (pair? (car lst))
-	  (append (flatten-list (car lst)) (flatten-list  (cdr lst)))
-	  (cons (car lst) (flatten-list (cdr lst))))
-  ))
-
-(define (list-minus a b)
-  "Return list of elements in A that are not in B."
-  (lset-difference eq? a b))
-
-
-;; TODO: use the srfi-1 partition function.
-(define-public (uniq-list l)
-  
-  "Uniq LIST, assuming that it is sorted"
-  (define (helper acc l) 
-    (if (null? l)
-	acc
-	(if (null? (cdr l))
-	    (cons (car l) acc)
-	    (if (equal? (car l) (cadr l))
-		(helper acc (cdr l))
-		(helper (cons (car l) acc)  (cdr l)))
-	    )))
-  (reverse! (helper '() l) '()))
-
-
-(define (split-at-predicate predicate l)
- "Split L = (a_1 a_2 ... a_k b_1 ... b_k)
-into L1 = (a_1 ... a_k ) and L2 =(b_1 .. b_k) 
-Such that (PREDICATE a_i a_{i+1}) and not (PREDICATE a_k b_1).
-L1 is copied, L2 not.
-
-(split-at-predicate (lambda (x y) (= (- y x) 2))  '(1 3 5 9 11) (cons '() '()))"
-;; "
-
-;; KUT EMACS MODE.
-
-  (define (inner-split predicate l acc)
-  (cond
-   ((null? l) acc)
-   ((null? (cdr l))
-    (set-car! acc (cons (car l) (car acc)))
-    acc)
-   ((predicate (car l) (cadr l))
-    (set-car! acc (cons (car l) (car acc)))
-    (inner-split predicate (cdr l) acc))
-   (else
-    (set-car! acc (cons (car l) (car acc)))
-    (set-cdr! acc (cdr l))
-    acc)
-
-  ))
- (let*
-    ((c (cons '() '()))
-     )
-  (inner-split predicate l  c)
-  (set-car! c (reverse! (car c))) 
-  c)
-)
-
-
-(define-public (split-list l sep?)
-"
-(display (split-list '(a b c / d e f / g) (lambda (x) (equal? x '/))) )
-=>
-((a b c) (d e f) (g))
-
-"
-;; " KUT EMACS.
-
-(define (split-one sep?  l acc)
-  "Split off the first parts before separator and return both parts."
-  (if (null? l)
-      (cons acc '())
-      (if (sep? (car l))
-	  (cons acc (cdr l))
-	  (split-one sep? (cdr l) (cons (car l) acc))
-	  )
-      ))
-
-(if (null? l)
-    '()
-    (let* ((c (split-one sep? l '())))
-      (cons (reverse! (car c) '()) (split-list (cdr c) sep?))
-      )))
-
-
-(define-public (interval-length x)
-  "Length of the number-pair X, when an interval"
-  (max 0 (- (cdr x) (car x)))
-  )
-  
-
-(define (other-axis a)
-  (remainder (+ a 1) 2))
-  
-
-(define-public (interval-widen iv amount)
-   (cons (- (car iv) amount)
-         (+ (cdr iv) amount)))
-
-(define-public (interval-union i1 i2)
-   (cons (min (car i1) (car i2))
-	 (max (cdr i1) (cdr i2))))
-
-
-(define-public (write-me message x)
-  "Return X.  Display MESSAGE and write X.  Handy for debugging,
-possibly turned off."
-  (display message) (write x) (newline) x)
-;;  x)
-
-(define (index-cell cell dir)
-  (if (equal? dir 1)
-      (cdr cell)
-      (car cell)))
-
-(define (cons-map f x)
-  "map F to contents of X"
-  (cons (f (car x)) (f (cdr x))))
-
-
-(define-public (list-insert-separator lst between)
-  "Create new list, inserting BETWEEN between elements of LIST"
-  (define (conc x y )
-    (if (eq? y #f)
-	(list x)
-	(cons x  (cons between y))
-	))
-  (fold-right conc #f lst))
-
-;;;;;;;;;;;;;;;;
-; other
-(define (sign x)
-  (if (= x 0)
-      0
-      (if (< x 0) -1 1)))
-
-(define-public (symbol<? l r)
-  (string<? (symbol->string l) (symbol->string r)))
-
-(define-public (!= l r)
-  (not (= l r)))
+;; gettext wrapper for guile < 1.7.2
+(if (defined? 'gettext)
+    (define-public _ gettext)
+    (define-public _ ly:gettext))
 
 (define-public (ly:load x)
-  (let* ((fn (%search-load-path x)))
+  (let* ((file-name (%search-load-path x)))
     (if (ly:get-option 'verbose)
-	(format (current-error-port) "[~A]" fn))
-    (primitive-load fn)))
+	(ly:progress "[~A" file-name))
+    (primitive-load file-name)
+    (if (ly:get-option 'verbose)
+	(ly:progress "]"))))
+
+(define-public TEX_STRING_HASHLIMIT 10000000)
+
+;; Cygwin
+;; #(CYGWIN_NT-5.1 Hostname 1.5.12(0.116/4/2) 2004-11-10 08:34 i686)
+;;
+;; Debian
+;; #(Linux hostname 2.4.27-1-686 #1 Fri Sep 3 06:28:00 UTC 2004 i686)
+;;
+;; Mingw
+;; #(Windows XP HOSTNAME build 2600 5.01 Service Pack 1 i686)
+;;
+(define PLATFORM
+  (string->symbol
+   (string-downcase
+    (car (string-tokenize (vector-ref (uname) 0) char-set:letter)))))
+
+(case PLATFORM
+  ((windows)
+   (define native-getcwd getcwd)
+   (define (slashify x)
+     (if (string-index x #\/)
+	 x
+	 (string-regexp-substitute "\\" "/" x)))
+   ;; FIXME: this prints a warning.
+  (define-public (ly-getcwd)
+     (slashify (native-getcwd))))
+  (else (define-public ly-getcwd getcwd)))
+
+(define-public (is-absolute? file-name)
+  (let ((file-name-length (string-length file-name)))
+    (if (= file-name-length 0)
+	#f
+	(or (eq? (string-ref file-name 0) #\/)
+	    (and (eq? PLATFORM 'windows)
+		 (> file-name-length 2)
+		 (eq? (string-ref file-name 1) #\:)
+		 (eq? (string-ref file-name 2) #\/))))))
+
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 
+(define (type-check-list location signature arguments)
+  "Typecheck a list of arguments against a list of type
+predicates. Print a message at LOCATION if any predicate failed."
+  (define (recursion-helper signature arguments count) 
+    (define (helper pred? arg count) 
+      (if (not (pred? arg))
+
+	  (begin
+	    (ly:input-message
+	     location
+	     (format
+	      #f (_ "wrong type for argument ~a.  Expecting ~a, found ~s")
+	      count (type-name pred?) arg))
+	    #f)
+	  #t))
+
+    (if (null? signature)
+	#t
+	(and (helper (car signature) (car arguments) count)
+	     (recursion-helper (cdr signature) (cdr arguments) (1+ count)))))
+  (recursion-helper signature arguments 1))
 
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 ;;  output
 
-   
+
 ;;(define-public (output-framework) (write "hello\n"))
 
 (define output-tex-module
@@ -398,29 +155,31 @@ possibly turned off."
 ;;       stencil expressions should have docstrings.
 (define-public (ly:all-stencil-expressions)
   "Return list of stencil expressions."
-  '(
-    beam
+  '(beam
     bezier-sandwich
     blank
     bracket
     char
+    circle
     dashed-line
     dashed-slur
     dot
     draw-line
     ez-ball
     filledbox
+    glyph-string
     horizontal-line
+    named-glyph
     polygon
     repeat-slash
     round-filled-box
-    symmetric-x-triangle
     text
-    tuplet
+    url-link
+    utf8-string
     white-dot
     white-text
-    zigzag-line
-    ))
+    embedded-ps
+    zigzag-line))
 
 ;; TODO:
 ;;  - generate this list by registering the output-backend-commands
@@ -433,118 +192,137 @@ possibly turned off."
     grob-cause
     no-origin
     placebox
-    unknown
-    ))
+    unknown))
+
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+;; Safe definitions utility
+(define safe-objects (list))
+
+(define-macro (define-safe-public arglist . body)
+  "Define a variable, export it, and mark it as safe, ie usable in LilyPond safe mode.
+The syntax is the same as `define*-public'."
+  (define (get-symbol arg)
+    (if (pair? arg)
+        (get-symbol (car arg))
+        arg))
+  (let ((safe-symbol (get-symbol arglist)))
+    `(begin
+       (define*-public ,arglist
+         ,@body)
+       (set! safe-objects (cons (cons ',safe-symbol ,safe-symbol)
+                                safe-objects))
+       ,safe-symbol)))
+
 
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 ;; other files.
 
 (for-each ly:load
-     ;; load-from-path
-     '("define-music-types.scm"
-       "output-lib.scm"
-       "c++.scm"
-       "chord-ignatzek-names.scm"
-       "chord-entry.scm"
-       "chord-generic-names.scm"
-       "stencil.scm"
-       "new-markup.scm"
-       "bass-figure.scm"
-       "music-functions.scm"
-       "part-combiner.scm"
-       "define-music-properties.scm"
-       "auto-beam.scm"
-       "chord-name.scm"
-
-       "ly-from-scheme.scm"
-       
-       "define-context-properties.scm"
-       "translation-functions.scm"
-       "script.scm"
-       "midi.scm"
-       "beam.scm"
-       "clef.scm"
-       "slur.scm"
-       "font.scm"
-       "encoding.scm"
-       
-       "fret-diagrams.scm"
-       "define-markup-commands.scm"
-       "define-grob-properties.scm"
-       "define-grobs.scm"
-       "define-grob-interfaces.scm"
-       "page-layout.scm"
-       "titling.scm"
-       
-       "paper.scm"
-
-       ; last:
-       "safe-lily.scm"
-       ))
+	  ;; load-from-path
+	  '("lily-library.scm"
+	    "file-cache.scm"
+	    "define-music-types.scm"
+	    "output-lib.scm"
+	    "c++.scm"
+	    "chord-ignatzek-names.scm"
+	    "chord-entry.scm"
+	    "chord-generic-names.scm"
+	    "stencil.scm"
+	    "markup.scm"
+	    "bass-figure.scm"
+	    "music-functions.scm"
+	    "part-combiner.scm"
+	    "define-music-properties.scm"
+	    "auto-beam.scm"
+	    "chord-name.scm"
+
+	    "ly-from-scheme.scm"
+	    
+	    "define-context-properties.scm"
+	    "translation-functions.scm"
+	    "script.scm"
+	    "midi.scm"
+	    "beam.scm"
+	    "clef.scm"
+	    "slur.scm"
+	    "font.scm"
+	    "encoding.scm"
+	    
+	    "fret-diagrams.scm"
+	    "define-markup-commands.scm"
+	    "define-grob-properties.scm"
+	    "define-grobs.scm"
+	    "define-grob-interfaces.scm"
+	    "page-layout.scm"
+	    "titling.scm"
+	    
+	    "paper.scm"
+	    "backend-library.scm"
+	    "x11-color.scm"
+
+	    ;; must be after everything has been defined
+	    "safe-lily.scm"))
 
 
 (set! type-p-name-alist
-  `(
-   (,boolean-or-symbol? . "boolean or symbol")
-   (,boolean? . "boolean")
-   (,char? . "char")
-   (,grob-list? . "list of grobs")
-   (,hash-table? . "hash table")
-   (,input-port? . "input port")
-   (,integer? . "integer")
-   (,list? . "list")
-   (,ly:context? . "context")
-   (,ly:dimension? . "dimension, in staff space")
-   (,ly:dir? . "direction")
-   (,ly:duration? . "duration")
-   (,ly:grob? . "layout object")
-   (,ly:input-location? . "input location")
-   (,ly:moment? . "moment")
-   (,ly:music? . "music")
-   (,ly:pitch? . "pitch")
-   (,ly:translator? . "translator")
-   (,ly:font-metric? . "font metric")
-   (,markup-list? . "list of markups")
-   (,markup? . "markup")
-   (,ly:music-list? . "list of music")
-   (,number-or-grob? . "number or grob")
-   (,number-or-string? . "number or string")
-   (,number-pair? . "pair of numbers")
-   (,number? . "number")
-   (,output-port? . "output port")   
-   (,pair? . "pair")
-   (,procedure? . "procedure") 
-   (,scheme? . "any type")
-   (,string? . "string")
-   (,symbol? . "symbol")
-   (,vector? . "vector")
-   ))
+      `(
+	(,boolean-or-symbol? . "boolean or symbol")
+	(,boolean? . "boolean")
+	(,char? . "char")
+	(,grob-list? . "list of grobs")
+	(,hash-table? . "hash table")
+	(,input-port? . "input port")
+	(,integer? . "integer")
+	(,list? . "list")
+	(,ly:context? . "context")
+	(,ly:dimension? . "dimension, in staff space")
+	(,ly:dir? . "direction")
+	(,ly:duration? . "duration")
+	(,ly:grob? . "layout object")
+	(,ly:input-location? . "input location")
+	(,ly:moment? . "moment")
+	(,ly:music? . "music")
+	(,ly:pitch? . "pitch")
+	(,ly:translator? . "translator")
+	(,ly:font-metric? . "font metric")
+	(,markup-list? . "list of markups")
+	(,markup? . "markup")
+	(,ly:music-list? . "list of music")
+	(,number-or-grob? . "number or grob")
+	(,number-or-string? . "number or string")
+	(,number-pair? . "pair of numbers")
+	(,number? . "number")
+	(,output-port? . "output port")   
+	(,pair? . "pair")
+	(,procedure? . "procedure") 
+	(,scheme? . "any type")
+	(,string? . "string")
+	(,symbol? . "symbol")
+	(,vector? . "vector")))
 
 
 ;; debug mem leaks
 
 (define gc-protect-stat-count 0)
 (define-public (dump-gc-protects)
-  (set! gc-protect-stat-count (1+ gc-protect-stat-count) )
-  (let*
-      ((protects (sort
-	   (hash-table->alist (ly:protects))
-	   (lambda (a b)
-	     (< (object-address (car a))
-		(object-address (car b))))))
-       (outfile    (open-file (string-append
-	       "gcstat-" (number->string gc-protect-stat-count)
-	       ".scm"
-	       ) "w")))
-
-    (display "DUMPING...\n")
+  (set! gc-protect-stat-count (1+ gc-protect-stat-count))
+  (let* ((protects (sort
+		    (hash-table->alist (ly:protects))
+		    (lambda (a b)
+		      (< (object-address (car a))
+			 (object-address (car b))))))
+	 (out-file-name (string-append
+			 "gcstat-" (number->string gc-protect-stat-count)
+			 ".scm"))
+	 (outfile    (open-file  out-file-name  "w")))
+
+    (display "Dumping gc protected objs to ...\n")
     (display
      (filter
       (lambda (x) (not (symbol? x))) 
       (map (lambda (y)
-	     (let
-		 ((x (car y))
-		  (c (cdr y)))
+	     (let ((x (car y))
+		   (c (cdr y)))
 
 	       (string-append
 		(string-join
@@ -554,58 +332,81 @@ possibly turned off."
 	   protects))
      outfile)))
 
+(define-public (tweak-grob-property grob sym val)
+  (set! (ly:grob-property grob sym) val))
 
-;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; 
-
-(define-public (postscript->pdf papersize name)
-  (let* ((cmd (string-append "ps2pdf -sPAPERSIZE=" papersize " " name))
-	 (output-name
-	  (regexp-substitute/global #f "\\.ps" name 'pre ".pdf" 'post)))
-
-    (newline (current-error-port))
-    (display (format (_ "Converting to ~s...") output-name)
-	     (current-error-port))
-    (newline (current-error-port))
-    
-    (if (ly:get-option 'verbose)
-	(display (format "Invoking `~s'..." cmd) (current-error-port)))
-
-  (system cmd)))
-
-(define-public (postscript->png resolution name)
-  (let
-      ((cmd (string-append
-	   "ps2png --resolution="
-	   (if (number? resolution)
-	       (number->string resolution)
-	       "90")
-	   (if (ly:get-option 'verbose)
-	       "--verbose "
-	       " ")
-	   name)))
-    (if (ly:get-option 'verbose)
-	(begin
-	  (display (format (_ "Invoking `~s'...") cmd) (current-error-port))
-	  (newline (current-error-port))))
-    (system cmd)))
-
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 (define-public (lilypond-main files)
   "Entry point for LilyPond."
-  (let* ((failed '())
-	 (handler (lambda (key arg) (set! failed (cons arg failed)))))
-    (for-each
-     (lambda (f)
-       (catch 'ly-file-failed (lambda () (ly:parse-file f)) handler)
-;;;       (dump-gc-protects)
-       )
-     files)
 
+  (if (null? files)
+      (no-files-handler))
+
+  (let ((failed (lilypond-all files)))
     (if (pair? failed)
 	(begin
-	  (newline (current-error-port))
-	  (display (_ "error: failed files: ") (current-error-port))
-	  (display (string-join failed) (current-error-port))
-	  (newline (current-error-port))
-	  (newline (current-error-port))
+	  (ly:error (_ "failed files: ~S") (string-join failed))
 	  (exit 1))
-	(exit 0))))
+	(begin
+	  ;; HACK: be sure to exit with single newline
+	  (ly:message "")
+	  (exit 0)))))
+
+(define (no-files-handler)
+  (ly:usage)
+  (exit 2))
+
+(define-public (lilypond-all files)
+  (let* ((failed '())
+	 (handler (lambda (key failed-file)
+		    (set! failed (append (list failed-file) failed)))))
+    ;;(handler (lambda (key . arg) (set! failed (append arg failed)))))
+    (for-each (lambda (x) (lilypond-file handler x)) files)))
+
+(define (lilypond-file handler file-name)
+  (catch 'ly-file-failed
+	 (lambda () (ly:parse-file file-name))
+	 (lambda (x . args) (handler x file-name)))
+  ;;(lambda (x) (handler x f)))
+  (if #f
+      (dump-gc-protects)))
+
+(use-modules (scm editor))
+
+(define (running-from-gui?)
+  (let ((have-tty? (isatty? (current-input-port))))
+    ;; If no TTY and not using safe, assume running from GUI.
+    ;; For mingw, the test must be inverted.
+    (if (eq? PLATFORM 'windows)
+	have-tty? (not have-tty?))))
+
+(define-public (gui-main files)
+  (if (null? files) (gui-no-files-handler))
+  (let* ((base (basename (car files) ".ly"))
+	 (log-name (string-append base ".log"))
+	 (log-file (open-file log-name "w")))
+    (if (not (running-from-gui?))
+	(ly:message (_ "Redirecting output to ~a...") log-name))
+    (ly:port-move (fileno (current-error-port)) log-file)
+    (ly:message "# -*-compilation-*-")
+    (let ((failed (lilypond-all files)))
+      (if (pair? failed)
+	  (begin
+	    (system (get-editor-command log-name 0 0))
+	    (ly:error (_ "failed files: ~S") (string-join failed))
+	    ;; not reached?
+	    (exit 1))
+	  (exit 0)))))
+
+(define (gui-no-files-handler)
+  (let* ((ly (string-append (ly:effective-prefix) "/ly/"))
+	 ;; FIXME: soft-code, localize
+	 (welcome-ly (string-append ly "Welcome_to_LilyPond.ly"))
+	 (cmd (get-editor-command welcome-ly 0 0)))
+    (ly:message (_ "Invoking `~a'...") cmd)
+    (system cmd)
+    (exit 1)))
+
+(or (not (running-from-gui?))
+    (ly:get-option 'safe)
+    (define lilypond-main gui-main))