[yelp] Use a monospace font and   for internal spacing.

[Shaun McCance <shaunm src gnome org>]

commit a1ebbd0651842f8f4f3cb672d5ef22322770fa9b
Author: Rupert Swarbrick <rswarbrick gmail com>
Date:   Thu Dec 16 00:13:17 2010 +0000

    Use a monospace font and &nbsp; for internal spacing.
    
    Basically, to get internal spaces correct (eg in tables etc), we
    *have* to use a monospace font.

 libyelp/yelp-man-parser.c   |   35 ++++++++++++++++++++++++++++++++++-
 stylesheets/man2html.xsl.in |    2 +-
 2 files changed, 35 insertions(+), 2 deletions(-)
---
diff --git a/libyelp/yelp-man-parser.c b/libyelp/yelp-man-parser.c
index bceb465..a02cc14 100644
--- a/libyelp/yelp-man-parser.c
+++ b/libyelp/yelp-man-parser.c
@@ -145,6 +145,7 @@ static struct LineParsePair line_parsers[] = {
 /* Parser helper functions (managing the state of the various parsing
  * bits) */
 static void finish_span (YelpManParser *parser);
+static guint dx_to_em_count (YelpManParser *parser, guint dx);
 
 /******************************************************************************/
 
@@ -373,10 +374,36 @@ static gboolean
 parse_h (YelpManParser *parser, GError **error)
 {
     guint dx;
+    guint k;
+    const gchar *str;
+
     if (SSCANF ("h%u", 1, &dx)) {
         RAISE_PARSE_ERROR ("Invalid h line from troff: %s");
     }
     parser->hpos += dx;
+
+    /* This is a bit hackish to be honest but... if we're in something
+     * that'll end up in a span, a spacing h command means that a gap
+     * should appear. It seems that the easiest way to get this is to
+     * insert nonbreaking spaces (eugh!)
+     *
+     * Of course we don't want to do this when chained from wh24 or
+     * whatever, so check that accumulator is nonempty and the last
+     * character isn't ' '.
+     */
+    str = parser->accumulator->str;
+    if ((parser->sheet_node) &&
+        (str[0] != '\0') &&
+        (str[strlen (str)-1] != ' ')) {
+
+        dx = dx_to_em_count (parser, dx);
+        for (k=0; k<dx; k++) {
+            /* 0xc2 0xa0 is nonbreaking space in utf8 */
+            g_string_append_c (parser->accumulator, 0xc2);
+            g_string_append_c (parser->accumulator, 0xa0);
+        }
+    }
+
     return TRUE;
 }
 
@@ -542,7 +569,7 @@ parse_body_text (YelpManParser *parser, GError **error)
 
         /* The indent is specified in em's. */
         snprintf (tmp, 64, "%d",
-                  (int)(parser->hpos / ((float)parser->char_width) / 1.5));
+                  (int)(dx_to_em_count (parser, parser->hpos) / 1.5));
         xmlNewProp (parser->sheet_node, BAD_CAST "indent", tmp);
     }
 
@@ -605,3 +632,9 @@ finish_span (YelpManParser *parser)
         g_string_truncate (parser->accumulator, 0);
     }
 }
+
+static guint
+dx_to_em_count (YelpManParser *parser, guint dx)
+{
+    return (int)(dx / ((float)parser->char_width));
+}
diff --git a/stylesheets/man2html.xsl.in b/stylesheets/man2html.xsl.in
index 45aea88..90dbc05 100644
--- a/stylesheets/man2html.xsl.in
+++ b/stylesheets/man2html.xsl.in
@@ -60,7 +60,7 @@
     <xsl:attribute name="style">
       <xsl:text>padding-left: </xsl:text>
       <xsl:value-of select="@indent"/>
-      <xsl:text>em;</xsl:text>
+      <xsl:text>em; font-family: monospace;</xsl:text>
     </xsl:attribute>
 
     <p>