Merge branch 'lilypond/translation' of git+ssh://git.savannah.gnu.org/srv/git/lilypon...

[lilypond.git] / scm / backend-library.scm

diff --git a/scm/backend-library.scm b/scm/backend-library.scm
index 2f1bc6f41acffa7ac6c317c9b727e9a6b3ce9196..ec0a537bdda07495124f7a85280a40efbc76e2dd 100644 (file)
--- a/scm/backend-library.scm
+++ b/scm/backend-library.scm
@@ -1,14 +1,26 @@
-;;;; backend-library.scm -- helpers for the backends.
+;;;; This file is part of LilyPond, the GNU music typesetter.
 ;;;;
-;;;;  source file of the GNU LilyPond music typesetter
-;;;; 
-;;;; (c) 2005--2009 Jan Nieuwenhuizen <janneke@gnu.org>
+;;;; Copyright (C) 2005--2010 Jan Nieuwenhuizen <janneke@gnu.org>
 ;;;; 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/>.
 
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; 
 ;; backend helpers.
 
 (use-modules (scm ps-to-png)
+            (scm paper-system)
             (ice-9 optargs))
 
 (define-public (ly:system command . rest)
@@ -113,9 +125,7 @@
     (if (eq? PLATFORM 'windows)
        (begin
          (set! cmd (string-regexp-substitute "=" "#" cmd))
-         (set! cmd (string-regexp-substitute "-dSAFER " "" cmd))
-         (if (access? pdf-name W_OK)
-             (delete-file pdf-name))))
+         (set! cmd (string-regexp-substitute "-dSAFER " "" cmd))))
 
     (ly:message (_ "Converting to `~a'...") pdf-name)
     (ly:progress "\n")
@@ -190,6 +200,26 @@
       scope)))
   (apply string-append (map output-scope scopes)))
 
+(define-public (relevant-book-systems book)
+  (let ((systems (ly:paper-book-systems book)))
+    ;; skip booktitles.
+    (if (and (not (ly:get-option 'include-book-title-preview))
+            (pair? systems)
+            (ly:prob-property (car systems) 'is-book-title #f))
+       (cdr systems)
+       systems)))
+
+(define-public (relevant-dump-systems systems)
+  (let ((to-dump-systems '()))
+    (for-each
+      (lambda (sys)
+       (if (or (paper-system-title? sys)
+               (not (pair? to-dump-systems))
+               (paper-system-title? (car to-dump-systems)))
+           (set! to-dump-systems (cons sys to-dump-systems))))
+      systems)
+    to-dump-systems))
+
 (define missing-stencil-list '())
 
 (define-public (backend-testing output-module)
@@ -213,3 +243,67 @@
     (lambda (x)
       (module-remove! output-module x))
     missing-stencil-list))
+
+(define (filter-out pred? lst)
+  (filter (lambda (x) (not (pred? x))) lst))
+
+(define-public (font-name-split font-name)
+  "Return (FONT-NAME . DESIGN-SIZE) from FONT-NAME string or #f."
+  (let ((match (regexp-exec (make-regexp "(.*)-([0-9]*)") font-name)))
+    (if (regexp-match? match)
+       (cons (match:substring match 1) (match:substring match 2))
+       (cons font-name-designsize #f))))
+
+;; Example of a pango-physical-font
+;; ("Emmentaler-11" "/home/janneke/vc/lilypond/out/share/lilypond/current/fonts/otf/emmentaler-11.otf" 0)
+(define-public (pango-pf-font-name pango-pf)
+  "Return the font-name of the pango physical font PANGO-PF."
+  (list-ref pango-pf 0))
+(define-public (pango-pf-file-name pango-pf)
+  "Return the file-name of the pango physical font PANGO-PF."
+  (list-ref pango-pf 1))
+(define-public (pango-pf-fontindex pango-pf)
+  "Return the fontindex of the pango physical font PANGO-PF."
+  (list-ref pango-pf 2))
+
+(define (pango-font-name pango-font)
+  (let ((pf-fonts (ly:pango-font-physical-fonts pango-font)))
+    (if (pair? pf-fonts)
+       (pango-pf-font-name (car pf-fonts))
+       "")))
+
+(define-public (define-fonts paper define-font define-pango-pf)
+  "Return a string of all fonts used in PAPER, invoking the functions
+DEFINE-FONT DEFINE-PANGO-PF for producing the actual font definition."
+
+  (let* ((font-list (ly:paper-fonts paper))
+        (pango-fonts (filter ly:pango-font? font-list))
+        (other-fonts (filter-out ly:pango-font? font-list))
+        (other-font-names (map ly:font-name other-fonts))
+        (pango-only-fonts
+         (filter-out (lambda (x)
+                       (member (pango-font-name x) other-font-names))
+                     pango-fonts)))
+
+  (define (font-load-command font)
+    (let* ((font-name (ly:font-name font))
+          (designsize (ly:font-design-size font))
+          (magnification (* (ly:font-magnification font)))
+          (ops (ly:output-def-lookup paper 'output-scale))
+          (scaling (* ops magnification designsize)))
+      (if (equal? font-name "unknown")
+         (display (list font font-name)))
+      (define-font font font-name scaling)))
+
+  (define (pango-font-load-command pango-font)
+    (let* ((pf-fonts (ly:pango-font-physical-fonts pango-font))
+          (pango-pf (if (pair? pf-fonts) (car pf-fonts) '("" "" 0)))
+          (font-name (pango-pf-font-name pango-pf))
+          (scaling (ly:output-def-lookup paper 'output-scale)))
+      (if (equal? font-name "unknown")
+         (display (list pango-font font-name)))
+      (define-pango-pf pango-pf font-name scaling)))
+
+  (string-append
+   (apply string-append (map font-load-command other-fonts))
+   (apply string-append (map pango-font-load-command pango-only-fonts)))))