# HG changeset patch
# User David Barts <n5jrn@me.com>
# Date 1584891172 25200
# Node ID 3264788aa0c8f771b22f7706d56b744df7285ddd
# Parent  d3eb798f7e9513aae3d5940e6e4fda901ed6e52e
Add --tex option.

diff -r d3eb798f7e95 -r 3264788aa0c8 curlyq
--- a/curlyq	Sun Mar 15 10:52:55 2020 -0700
+++ b/curlyq	Sun Mar 22 08:32:52 2020 -0700
@@ -30,6 +30,9 @@
 FTMIN = "'"
 INSEC = '"'
 
+# For --tex option
+TEX_SUBST = [ ("---", "—"), ("--", "–"), ("...", "…") ]
+
 # C l a s s e s
 
 class SafeWorkspace(Workspace):
@@ -52,6 +55,7 @@
             if args.force: uncurl(ws)
             curler.feed()
             if args.backtick: fims(ws)
+            if args.tex: tex(ws)
             output_fp.write(str(ws))
             ws.clear()
         if line == "":
@@ -69,6 +73,7 @@
         if args.force: uncurl(ws)
         curler.feed()
         if args.backtick: fims(ws)
+        if args.tex: tex(ws)
         output_fp.write(str(ws))
         ws.clear()
 
@@ -98,6 +103,24 @@
             buf[pos] = FTMIN
         pos += 1
 
+def gsub(buf, old, repl):
+    old = Workspace(old)
+    repl = Workspace(repl)
+    olen = len(old)
+    delta = len(repl)
+    pos = 0
+    while True:
+        pos = buf.find(old, pos)
+        if pos < 0:
+            break
+        buf[pos:pos+olen] = repl
+        pos += delta
+
+def tex(buf):
+    global TEX_SUBST
+    for i in TEX_SUBST:
+        gsub(buf, i[0], i[1])
+
 # M a i n   P r o g r a m
 
 # Parse arguments
@@ -112,6 +135,7 @@
 parser.add_argument("--icoding", default="UTF-8", help="Input encoding (default UTF-8).")
 parser.add_argument("--inplace", action="store_true", help="Edit file in-place.")
 parser.add_argument("--ocoding", default="UTF-8", help="Output encoding (default UTF-8).")
+parser.add_argument("--tex", action="store_true", help="TeX/LaTeX style dash and ellipsis substitution.")
 parser.add_argument("input", nargs="?", help="Input file.")
 parser.add_argument("output", nargs="?", help="Output file.")
 try:
@@ -119,10 +143,13 @@
 except SystemExit:
     sys.exit(2)
 
-# Sanity check
+# Sanity checks
 if args.html and args.backtick:
     sys.stderr.write(MYNAME + ": --backtick not supported in --html mode\n")
     sys.exit(2)
+if args.html and args.tex:
+    sys.stderr.write(MYNAME + ": --tex not supported in --html mode\n")
+    sys.exit(2)
 
 # Sanity-check codings
 try: