Add option to set scrollbar width

Changelog

@@ -11,6 +11,7 @@
         - Regex matching (#113)
         - Take Screenshot of rofi using keybinding.
         - Hotkey for sorting: (#298)
+		- Option to set scrollbar width.
     Improvements:
 		- Fix return code of multi-select.
         - Update manpage (#289, #291)

config/config.def.c

@@ -150,4 +150,5 @@ Settings config = {
     .fake_transparency = FALSE,
     .dpi               =                                        -1,
     .threads           =                                         1,
+    .scrollbar_width   =                                         8,
 };

doc/rofi-manpage.markdown

@@ -359,6 +359,10 @@ Set separator style. Possible options are "none", "solid" or "dash".
 
 Hide the scrollbar.
 
+`-scrollbar-width` *width*
+
+Set the scrollbar width.
+
 `-glob`
 
 Use glob style matching

doc/rofi.1

@@ -598,6 +598,12 @@ Default: *dash*
 Hide the scrollbar\.
 .
 .P
+\fB\-scrollbar\-width\fR \fIwidth\fR
+.
+.P
+Set the scrollbar width\.
+.
+.P
 \fB\-glob\fR
 .
 .P

include/rofi.h

@@ -230,6 +230,7 @@ typedef struct _Settings
     int            dpi;
     /** Number threads (1 to disable) */
     unsigned int   threads;
+    unsigned int   scrollbar_width;
 } Settings;
 
 /** Global Settings structure. */

source/rofi.c

@@ -1382,7 +1382,7 @@ MenuReturn menu ( Mode *sw, char **input, char *prompt, unsigned int *selected_l
                                           state.element_width, element_height, NORMAL, "" );
     }
     if ( !config.hide_scrollbar ) {
-        unsigned int sbw = config.line_margin + 8;
+        unsigned int sbw = config.line_margin+config.scrollbar_width;
         state.scrollbar = scrollbar_create ( state.w - state.border - sbw, state.top_offset,
                                              sbw, ( state.max_rows - 1 ) * ( element_height + config.line_margin ) + element_height );
     }

source/xrmoptions.c

@@ -138,7 +138,8 @@ static XrmOption xrmOptions[] = {
     { xrm_Boolean, "fullscreen",           { .num  = &config.fullscreen         }, NULL, "Fullscreen"                                  },
     { xrm_Boolean, "fake-transparency",    { .num  = &config.fake_transparency  }, NULL, "Fake transparency"                           },
     { xrm_SNumber, "dpi",                  { .snum = &config.dpi                }, NULL, "DPI"                                         },
-    { xrm_Number,  "threads",              { .num  = &config.threads            }, NULL, "Threads to use for string matching"          }
+    { xrm_Number,  "threads",              { .num  = &config.threads            }, NULL, "Threads to use for string matching"          },
+    { xrm_Number,  "scrollbar-width",      { .num  = &config.scrollbar_width    }, NULL, "Scrollbar width"                             }
 };
 
 // Dynamic options.