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Add --initial-size argument for tui

--- a/tui_main.c

+++ b/tui_main.c

@@ -33,6 +33,9 @@

 "                           If you plan to work with large files,\n"

 "                           set this to a low number.\n"

 "                           Default: 100\n"

+"    --initial-size <nxn>   When creating a new grid file, use these\n" 

+"                           starting dimensions.\n"

+"                           Default: 57x25\n"

 "    -h or --help           Print this message and exit.\n"

 "\n"

 "OSC/MIDI options:\n"

@@ -1814,6 +1817,7 @@

 enum {

   Argopt_margins = UCHAR_MAX + 1,

   Argopt_undo_limit,

+  Argopt_init_grid_size,

   Argopt_osc_server,

   Argopt_osc_port,

   Argopt_osc_midi_bidule,

@@ -1828,6 +1832,7 @@

   static struct option tui_options[] = {

       {"margins", required_argument, 0, Argopt_margins},

       {"undo-limit", required_argument, 0, Argopt_undo_limit},

+      {"initial-size", required_argument, 0, Argopt_init_grid_size},

       {"help", no_argument, 0, 'h'},

       {"osc-server", required_argument, 0, Argopt_osc_server},

       {"osc-port", required_argument, 0, Argopt_osc_port},

@@ -1845,6 +1850,8 @@

   char const* osc_hostname = NULL;

   char const* osc_port = NULL;

   bool strict_timing = false;

+  int init_grid_dim_y = 25;

+  int init_grid_dim_x = 57;

   Midi_mode midi_mode;

   midi_mode_init_null(&midi_mode);

   for (;;) {

@@ -1880,6 +1887,28 @@

         exit(1);

       }

     } break;

+    case Argopt_init_grid_size: {

+      enum {

+        Max_dim_arg_val_y = ORCA_Y_MAX,

+        Max_dim_arg_val_x = ORCA_X_MAX,

+      };

+      if (sscanf(optarg, "%dx%d", &init_grid_dim_x, &init_grid_dim_y) != 2) {

+        fprintf(stderr, "Bad argument format or count for initial-size.\n");

+        exit(1);

+      }

+      if (init_grid_dim_x <= 0 || init_grid_dim_x > Max_dim_arg_val_x) {

+        fprintf(stderr,

+                "X dimension for initial-size must be 1 <= n <= %d, was %d.\n",

+                Max_dim_arg_val_x, init_grid_dim_x);

+        exit(1);

+      }

+      if (init_grid_dim_y <= 0 || init_grid_dim_y > Max_dim_arg_val_y) {

+        fprintf(stderr,

+                "Y dimension for initial-size must be 1 <= n <= %d, was %d.\n",

+                Max_dim_arg_val_y, init_grid_dim_y);

+        exit(1);

+      }

+    } break;

     case Argopt_osc_server: {

       osc_hostname = optarg;

     } break;

@@ -2001,7 +2030,8 @@

     heapstr_init_cstr(&file_name, input_file);

   } else {

     heapstr_init_cstr(&file_name, "unnamed");

-    field_init_fill(&ged_state.field, 25, 57, '.');

+    field_init_fill(&ged_state.field, (Usz)init_grid_dim_y,

+                    (Usz)init_grid_dim_x, '.');

   }

   ged_state.filename = file_name.str;

   ged_set_midi_mode(&ged_state, &midi_mode);