[gmime] Updated text/enriched filter to parse paraindent params

[Jeffrey Stedfast <fejj src gnome org>]

commit 12867372b93d82cedff557663a7dae10499d2f09
Author: Jeffrey Stedfast <jestedfa microsoft com>
Date:   Sat Dec 16 15:37:39 2017 -0500

    Updated text/enriched filter to parse paraindent params

 gmime/gmime-filter-enriched.c    |   58 ++++++++++++++++++++++++++++++++++++-
 tests/data/filters/enriched.html |    2 +-
 tests/test-filters.c             |    1 +
 3 files changed, 58 insertions(+), 3 deletions(-)
---
diff --git a/gmime/gmime-filter-enriched.c b/gmime/gmime-filter-enriched.c
index d3cb3b3..adf811e 100644
--- a/gmime/gmime-filter-enriched.c
+++ b/gmime/gmime-filter-enriched.c
@@ -193,10 +193,64 @@ enriched_tag_needs_param (const char *tag)
 }
 #endif
 
+typedef enum {
+       PARAINDENT_NONE  = 0,
+       PARAINDENT_LEFT  = (1 << 0),
+       PARAINDENT_RIGHT = (1 << 1),
+       PARAINDENT_IN    = (1 << 2),
+       PARAINDENT_OUT   = (1 << 3)
+} paraindent_t;
+
+static const char *valid_indents[] = {
+       "left", "right", "in", "out"
+};
+
 static char *
-param_parse_paraindent (const char *inptr, size_t inlen)
+param_parse_paraindent (const char *in, size_t inlen)
 {
-       return g_strdup ("text-indent:40px");
+       const char *inend = in + inlen;
+       const char *inptr = in;
+       paraindent_t indent = 0;
+       GString *str;
+       guint i;
+       
+       while (inptr < inend) {
+               const char *value = inptr;
+               size_t vlen;
+               
+               while (inptr < inend && *inptr != ',')
+                       inptr++;
+               
+               vlen = inptr - value;
+               
+               for (i = 0; i < G_N_ELEMENTS (valid_indents); i++) {
+                       size_t n = strlen (valid_indents[i]);
+                       
+                       if (vlen == n && !g_ascii_strncasecmp (value, valid_indents[i], n)) {
+                               indent |= 1 << i;
+                               break;
+                       }
+               }
+               
+               inptr++;
+       }
+       
+       str = g_string_new ("");
+       
+       /* if In and Out are both specified, they cancel each other out? */
+       if (indent & PARAINDENT_IN && indent & PARAINDENT_OUT)
+               indent = indent & ~(PARAINDENT_IN | PARAINDENT_OUT);
+       
+       if (indent & PARAINDENT_LEFT)
+               g_string_append_printf (str, "%smargin-left:4em", str->len > 0 ? "; " : "");
+       if (indent & PARAINDENT_RIGHT)
+               g_string_append_printf (str, "%smargin-right:4em", str->len > 0 ? "; " : "");
+       if (indent & PARAINDENT_IN)
+               g_string_append_printf (str, "%smargin:4em", str->len > 0 ? "; " : "");
+       if (indent & PARAINDENT_OUT)
+               g_string_append_printf (str, "%smargin:-4em", str->len > 0 ? "; " : "");
+       
+       return g_string_free (str, FALSE);
 }
 
 static const char *valid_colours[] = {
diff --git a/tests/data/filters/enriched.html b/tests/data/filters/enriched.html
index 8fd8d68..b869d41 100644
--- a/tests/data/filters/enriched.html
+++ b/tests/data/filters/enriched.html
@@ -1 +1 @@
-<b>Hello, <i>world!</i></b><br><font color="red">Blood</font> is <b>thicker</b> than <font 
color="#0000FF">water</font>.<br><p style="text-indent:40px"><i>-- Well-known proverb </i></p>
\ No newline at end of file
+<b>Hello, <i>world!</i></b><br><font color="red">Blood</font> is <b>thicker</b> than <font 
color="#0000FF">water</font>.<br><p style="margin-left:4em"><i>-- Well-known proverb </i></p>
\ No newline at end of file
diff --git a/tests/test-filters.c b/tests/test-filters.c
index 8423c69..d270fb7 100644
--- a/tests/test-filters.c
+++ b/tests/test-filters.c
@@ -184,6 +184,7 @@ test_enriched (const char *datadir, const char *input, const char *output)
        if (actual->len != expected->len) {
                testsuite_check_failed ("%s failed: stream lengths do not match: expected=%u; actual=%u",
                                        what, expected->len, actual->len);
+               printf ("enriched: -->%.*s<--\n", (int) actual->len, (char *) actual->data);
                goto error;
        }