Add an option to change the matching negation character.

Fixes: #877

config/config.c

@@ -152,4 +152,6 @@ Settings config = {
     .plugin_path            = PLUGIN_PATH,
     .max_history_size       = 25,
     .combi_hide_mode_prefix = FALSE,
+
+    .matching_negate_char   = '-',
 };

doc/test_xr.txt

@@ -118,6 +118,8 @@ rofi.scroll-method:                  0
 ! rofi.max-history-size:               25
 ! "Hide the prefix mode prefix on the combi view." Set from: Default
 ! rofi.combi-hide-mode-prefix:         false
+! "Set the character used to negate the matching. ('\0' to disable)" Set from: Default
+! rofi.matching-negate-char:           -
 ! "Pidfile location" Set from: File
 rofi.pid:                            /tmp/rofi.pid
 ! "Paste primary selection" Set from: File

include/settings.h

@@ -177,6 +177,8 @@ typedef struct
     /** Maximum history length per mode. */
     unsigned int   max_history_size;
     gboolean       combi_hide_mode_prefix;
+
+    char           matching_negate_char;
 } Settings;
 /** Global Settings structure. */
 extern Settings config;

source/helper.c

@@ -221,7 +221,7 @@ static rofi_int_matcher * create_regex ( const char *input, int case_sensitive )
     GRegex           * retv = NULL;
     gchar            *r;
     rofi_int_matcher *rv = g_malloc0 ( sizeof ( rofi_int_matcher ) );
-    if ( input && input[0] == '-' ) {
+    if ( input && input[0] == config.matching_negate_char ) {
         rv->invert = 1;
         input++;
     }

source/xrmoptions.c

@@ -214,6 +214,8 @@ static XrmOption xrmOptions[] = {
       "Max history size (WARNING: can cause slowdowns when set to high).", CONFIG_DEFAULT },
     { xrm_Boolean, "combi-hide-mode-prefix", { .snum = &config.combi_hide_mode_prefix         }, NULL,
       "Hide the prefix mode prefix on the combi view.", CONFIG_DEFAULT },
+    { xrm_Char, "matching-negate-char",     { .charc= &config.matching_negate_char            }, NULL,
+      "Set the character used to negate the matching. ('\\0' to disable)", CONFIG_DEFAULT },
 };
 
 /** Dynamic array of extra options */