From: Patrick McCarty <pnorcks@gmail.com>
Date: Mon, 8 Feb 2010 23:01:36 +0000 (-0800)
Subject: PS backend: move system-filtering code to backend-library.
X-Git-Tag: release/2.13.13-1~13
X-Git-Url: https://git.donarmstrong.com/?a=commitdiff_plain;h=d473dbfc4a6f500b14ccdd78a33675b90151f775;p=lilypond.git

PS backend: move system-filtering code to backend-library.

The SVG backend will need this code, so the backend-library
is a better place for it.
---

diff --git a/scm/backend-library.scm b/scm/backend-library.scm
index 5116fecd82..90c0cd07ed 100644
--- a/scm/backend-library.scm
+++ b/scm/backend-library.scm
@@ -20,6 +20,7 @@
 ;; backend helpers.
 
 (use-modules (scm ps-to-png)
+	     (scm paper-system)
 	     (ice-9 optargs))
 
 (define-public (ly:system command . rest)
@@ -201,6 +202,26 @@
       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)
diff --git a/scm/framework-ps.scm b/scm/framework-ps.scm
index 7b993fbb2b..baacb96124 100644
--- a/scm/framework-ps.scm
+++ b/scm/framework-ps.scm
@@ -602,20 +602,8 @@ fonts inline."
 
 (define-public (output-preview-framework basename book scopes fields)
   (let* ((paper (ly:paper-book-paper book))
-	 (systems (ly:paper-book-systems book))
-	 (to-dump-systems '()))
-    ;; skip booktitles.
-    (if (and (not (ly:get-option 'include-book-title-preview))
-	     (pair? systems)
-	     (ly:prob-property (car systems) 'is-book-title #f))
-	(set! systems (cdr 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)
+	 (systems (relevant-book-systems book))
+	 (to-dump-systems (relevant-dump-systems systems)))
     (dump-stencil-as-EPS paper
 			 (stack-stencils Y DOWN 0.0
 					 (map paper-system-stencil