From fa080de7afc95aa1c19a6e6fc0e0708ced2eadc4 Mon Sep 17 00:00:00 2001
From: Joseph Hunkeler <jhunkeler@gmail.com>
Date: Wed, 8 Jul 2015 20:46:52 -0400
Subject: Initial commit

---
 sys/psio/pswidth.x | 76 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 76 insertions(+)
 create mode 100644 sys/psio/pswidth.x

(limited to 'sys/psio/pswidth.x')

diff --git a/sys/psio/pswidth.x b/sys/psio/pswidth.x
new file mode 100644
index 00000000..e102f37c
--- /dev/null
+++ b/sys/psio/pswidth.x
@@ -0,0 +1,76 @@
+# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
+
+include <syserr.h>
+include <ctype.h>
+include <psset.h>
+include "psio.h"
+
+
+# PS_TEXTWIDTH -- Return the length in PS pixels of the given string.  We 
+# handle font changes here and keep track of the current and previous font.
+
+int procedure ps_textwidth (ps, str)
+
+pointer	ps					#I package pointer
+char	str[ARB]				#I string to check
+
+int	ip, width, f_current
+int	ps_getfont(), ps_chwidth()
+errchk	ps_chwidth
+
+begin
+	# Initialize.
+	width = 0
+	f_current = PS_CFONT(ps)
+
+	# Now process the word, computing the width of each character and
+	# returning the total width.  Handle inline font changes.
+
+	for (ip=1; str[ip] != EOS; ip=ip+1) {
+
+	    # Handle any font changes.
+	    if (str[ip] == '\\' && str[ip+1] == 'f') {
+	        f_current = ps_getfont (ps, str[ip+2])
+	        ip = ip + 2
+	    } else if ((str[ip] == '\\' && str[ip+1] == '(') ||
+	    	       (str[ip] == '\\' && str[ip+1] == ')')) {
+		# Skip over escaped parens in width computation.
+	        ip = ip + 1
+	        width = width + ps_chwidth (str[ip], f_current)
+	    } else
+	        width = width + ps_chwidth (str[ip], f_current)
+	}
+
+	return (width)
+end
+
+
+# PS_CHWIDTH -- Given the font type and a character return the width.
+
+int procedure ps_chwidth (ch, font)
+
+char	ch					#I character
+int	font					#I font type character
+
+errchk	syserr
+include	"font.com"
+
+begin
+	if (ch < START_CH || ch > END_CH)
+	    return (0)
+
+	switch (font) {
+	case F_ROMAN: 	
+	    return (roman[(ch-START_CH+1)])
+	case F_BOLD: 	
+	    return (bold[(ch-START_CH+1)])
+	case F_ITALIC: 	
+	    return (italic[(ch-START_CH+1)])
+	case F_TELETYPE: 	
+	    return (FIXED_WIDTH)
+	case F_PREVIOUS: 	
+	    return (FIXED_WIDTH)
+	default:
+	    call syserr (SYS_PSFONT)
+	}
+end
-- 
cgit