Add '-dcrop' option to ps and svg backends

[lilypond.git] / scm / lily.scm

diff --git a/scm/lily.scm b/scm/lily.scm
index 5ead4e6c9cf9da25e8f12bcf08cdfa145692f613..5e727f1a5892cbb4de4d067f53e719ab3e9fcaf8 100644 (file)
--- a/scm/lily.scm
+++ b/scm/lily.scm
@@ -86,6 +86,7 @@
 ;;
 
 (define lilypond-declarations '())
+(define lilypond-exports '())
 (define after-session-hook (make-hook))
 
 (define-public (call-after-session thunk)
@@ -93,7 +94,16 @@
       (ly:error (_ "call-after-session used after session start")))
   (add-hook! after-session-hook thunk #t))
 
-(defmacro-public define-session (name value)
+(define (make-session-variable name value)
+  (if (ly:undead? lilypond-declarations)
+      (ly:error (_ "define-session used after session start")))
+  (let ((var (module-make-local-var! (current-module) name)))
+    (if (variable-bound? var)
+        (ly:error (_ "symbol ~S redefined") name))
+    (variable-set! var value)
+    var))
+
+(defmacro define-session (name value)
   "This defines a variable @var{name} with the starting value
 @var{value} that is reinitialized at the start of each session.
 A@tie{}session basically corresponds to one LilyPond file on the
@@ -107,17 +117,22 @@ to their front or replacing them altogether, not by modifying parts of
 them.  It is an error to call @code{define-session} after the first
 session has started."
   (define (add-session-variable name value)
-    (if (ly:undead? lilypond-declarations)
-        (ly:error (_ "define-session used after session start")))
-    (let ((var (make-variable value)))
-      (module-add! (current-module) name var)
-      (set! lilypond-declarations (cons var lilypond-declarations))))
+    (set! lilypond-declarations
+          (cons (make-session-variable name value) lilypond-declarations)))
   `(,add-session-variable ',name ,value))
 
-(defmacro-public define-session-public (name value)
-  "Like @code{define-session}, but also exports @var{name}."
+(defmacro define-session-public (name value)
+  "Like @code{define-session}, but also exports @var{name} into parser modules."
+  (define (add-session-variable name value)
+    (set! lilypond-exports
+          (acons name (make-session-variable name value) lilypond-exports)))
   `(begin
-     (define-session ,name ,value)
+     ;; this is a bit icky: we place the variable right into every
+     ;; parser module so that both set! and define will affect the
+     ;; original variable in the (lily) module.  However, we _also_
+     ;; export it normally from (lily) for the sake of other modules
+     ;; not sharing the name space of the parser.
+     (,add-session-variable ',name ,value)
      (export ,name)))
 
 (define (session-terminate)
@@ -158,7 +173,16 @@ variables to their value after the initial call of @var{thunk}."
                  (module-add! (current-module) (car p) var))))
          (ly:get-undead lilypond-declarations)))
       (begin
+        ;; import all public session variables natively into parser
+        ;; module.  That makes them behave identically under define/set!
+        (for-each (lambda (v)
+                    (module-add! (current-module) (car v) (cdr v)))
+                  lilypond-exports)
+        ;; Initialize first session
         (thunk)
+        ;; lilypond-exports is no longer needed since we will grab its
+        ;; values from (current-module).
+        (set! lilypond-exports #f)
         (set! lilypond-interfaces
               (filter (lambda (m) (eq? 'interface (module-kind m)))
                       (module-uses (current-module))))
@@ -204,6 +228,9 @@ EPS backend.")
     (clip-systems
      #f
      "Generate cut-out snippets of a score.")
+    (crop
+     #f
+     "Match the size of the normal output to the typeset image.")
     (datadir
      #f
      "LilyPond prefix for data files (read-only).")
@@ -252,12 +279,18 @@ regression testing.")
      #f
      "Pad left edge of the output EPS bounding box by
 given amount (in mm).")
+    (font-export-dir
+     #f
+     "Directory for exporting fonts as PostScript files.")
     (gs-load-fonts
      #f
      "Load fonts via Ghostscript.")
     (gs-load-lily-fonts
      #f
      "Load only LilyPond fonts via Ghostscript.")
+    (gs-never-embed-fonts
+     #f
+     "Make Ghostscript embed only TrueType fonts and no other font format.")
     (gui
      #f
      "Run LilyPond from a GUI and redirect stderr to
@@ -933,7 +966,11 @@ PIDs or the number of the process."
             (remove string-null?
                     (append-map
                      (lambda (f)
-                       (string-split (string-delete (ly:gulp-file f) #\cr) #\nl))
+                       (string-split
+                         (if (guile-v2)
+                             (string-delete #\cr (ly:gulp-file f))
+                             (string-delete (ly:gulp-file f) #\cr))
+                         #\nl))
                      files))))
   (if (and (number? (ly:get-option 'job-count))
            (>= (length files) (ly:get-option 'job-count)))