From ddadb157cfa3e1658f120341b4085ec5421ff73f Mon Sep 17 00:00:00 2001
From: Tomas Bzatek <tbzatek@users.sourceforge.net>
Date: Sun, 7 Apr 2013 12:01:40 +0200
Subject: Strip unused template tags by default

If there's a tag defined but not used on replace table processing,
this option determines whether it should be written in the generated
file or ignored completely.

Turned on by default, this will save a few bytes. Use commandline option
'--debug-dont-strip-unused-tags' to turn it off, e.g. when debugging
template files.
---
 src/cgg.c           |  3 +++
 src/generators.c    |  3 +++
 src/replace-table.c | 16 +++++++++++++++-
 src/replace-table.h |  5 +++++
 src/setup.h         |  1 +
 5 files changed, 27 insertions(+), 1 deletion(-)

diff --git a/src/cgg.c b/src/cgg.c
index 7510d2e..5a4949a 100644
--- a/src/cgg.c
+++ b/src/cgg.c
@@ -44,6 +44,7 @@ static gchar *dst_dir = NULL;
 static gboolean verbose = FALSE;
 static gboolean update = FALSE;
 static gboolean fullsize = FALSE;
+static gboolean dont_strip_unused_tags = FALSE;
 static int jobs = 0;
 
 
@@ -68,6 +69,7 @@ parse_cmd (int argc, char *argv[])
             NULL },
           { "update", 'u', 0, G_OPTION_ARG_NONE, &update, "Update the output structure", NULL },
           { "fullsize", 'f', 0, G_OPTION_ARG_NONE, &fullsize, "Override the nofullsize switch and generate full gallery", NULL },
+          { "debug-dont-strip-unused-tags", 0, 0, G_OPTION_ARG_NONE, &dont_strip_unused_tags, "Don't strip unused/unknown template tags", NULL },
           { NULL }
 	};
 
@@ -197,6 +199,7 @@ main (int argc, char* argv[])
   setup->verbose = verbose;
   setup->update_mode = update;
   setup->override_nofullsize = fullsize;
+  setup->strip_unused_tags = ! dont_strip_unused_tags;
 
   path_info = g_malloc0 (sizeof (TPathInfo));
   path_info->templates_root = templates_basedir;
diff --git a/src/generators.c b/src/generators.c
index ead3fb6..41ca616 100644
--- a/src/generators.c
+++ b/src/generators.c
@@ -345,6 +345,7 @@ write_html_album (TGallerySetup *setup,
 
   defines = clone_string_hash_table (theme->defines);
   global_replace_table = replace_table_new ();
+  replace_table_set_strip_unused_tags (global_replace_table, setup->strip_unused_tags);
   replace_table_set_defines (global_replace_table, defines);
   block_parser = block_parser_new ();
   block_parser_set_conditionals (block_parser, defines);
@@ -499,6 +500,7 @@ write_html_album (TGallerySetup *setup,
         }
 
         local_replace_table = replace_table_new ();
+        replace_table_set_strip_unused_tags (local_replace_table, setup->strip_unused_tags);
         local_defines = clone_string_hash_table (defines);
         replace_table_set_defines (local_replace_table, local_defines);
         s1 = NULL;
@@ -719,6 +721,7 @@ write_html_image (TGallerySetup *setup,
 
   defines = clone_string_hash_table (theme->defines);
   replace_table = replace_table_new ();
+  replace_table_set_strip_unused_tags (replace_table, setup->strip_unused_tags);
   replace_table_set_defines (replace_table, defines);
   block_parser = block_parser_new ();
   block_parser_set_conditionals (block_parser, defines);
diff --git a/src/replace-table.c b/src/replace-table.c
index 9c1b254..a36a83c 100644
--- a/src/replace-table.c
+++ b/src/replace-table.c
@@ -34,6 +34,7 @@ struct ReplaceTable {
   GHashTable *table;
   GHashTable *defines;
   GHashTable *functions;
+  gboolean strip_unused_tags;
 };
 
 typedef struct {
@@ -50,6 +51,7 @@ replace_table_new ()
   table = g_new0 (ReplaceTable, 1);
   table->table = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, g_free);
   table->functions = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, g_free);
+  table->strip_unused_tags = TRUE;  /*  default  */
 
   return table;
 }
@@ -65,6 +67,18 @@ replace_table_free (ReplaceTable *table)
 }
 
 
+/*
+ *   replace_table_set_strip_unused_tags: set whether all unused/unknown tags should be stripped (default = TRUE)
+ *
+ */
+void
+replace_table_set_strip_unused_tags (ReplaceTable *table, gboolean value)
+{
+  g_return_if_fail (table != NULL);
+
+  table->strip_unused_tags = value;
+}
+
 /*
  *   replace_table_add_key: add tag/value pair to replace
  *
@@ -345,7 +359,7 @@ replace_table_process (gchar **buffer, ReplaceTable *table)
     }
 
     /*  push the tag if not matched above  */
-    if (! handled)
+    if (! handled && ! table->strip_unused_tags)
       g_string_append_len (dst, start, end - start + 1);
 
     g_free (token);
diff --git a/src/replace-table.h b/src/replace-table.h
index 1a1c4ac..e5e80cd 100644
--- a/src/replace-table.h
+++ b/src/replace-table.h
@@ -35,6 +35,11 @@ ReplaceTable * replace_table_new ();
 
 void replace_table_free (ReplaceTable *table);
 
+/*
+ *   replace_table_set_strip_unused_tags: set whether all unused/unknown tags should be stripped (default = TRUE)
+ *
+ */
+void replace_table_set_strip_unused_tags (ReplaceTable *table, gboolean value);
 
 /*
  *   replace_table_add_key: add tag/value pair to replace
diff --git a/src/setup.h b/src/setup.h
index 6d5316e..1fe6a53 100644
--- a/src/setup.h
+++ b/src/setup.h
@@ -44,6 +44,7 @@ typedef struct {
   gboolean verbose;
   gboolean update_mode;
   gboolean override_nofullsize;
+  gboolean strip_unused_tags;
   gchar *setup_xml_path;
 
   TGalleryDesign *design;
-- 
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