release/src/router/libncurses/Ada95/samples/ncurses2-trace_set.adb

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                       GNAT ncurses Binding Samples                       --
   4 --                                                                          --
   5 --                            ncurses2.trace_set                            --
   6 --                                                                          --
   7 --                                 B O D Y                                  --
   8 --                                                                          --
   9 ------------------------------------------------------------------------------
  10 -- Copyright (c) 2000-2008,2011 Free Software Foundation, Inc.              --
  11 --                                                                          --
  12 -- Permission is hereby granted, free of charge, to any person obtaining a  --
  13 -- copy of this software and associated documentation files (the            --
  14 -- "Software"), to deal in the Software without restriction, including      --
  15 -- without limitation the rights to use, copy, modify, merge, publish,      --
  16 -- distribute, distribute with modifications, sublicense, and/or sell       --
  17 -- copies of the Software, and to permit persons to whom the Software is    --
  18 -- furnished to do so, subject to the following conditions:                 --
  19 --                                                                          --
  20 -- The above copyright notice and this permission notice shall be included  --
  21 -- in all copies or substantial portions of the Software.                   --
  22 --                                                                          --
  23 -- THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  --
  24 -- OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               --
  25 -- MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   --
  26 -- IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   --
  27 -- DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    --
  28 -- OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    --
  29 -- THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               --
  30 --                                                                          --
  31 -- Except as contained in this notice, the name(s) of the above copyright   --
  32 -- holders shall not be used in advertising or otherwise to promote the     --
  33 -- sale, use or other dealings in this Software without prior written       --
  34 -- authorization.                                                           --
  35 ------------------------------------------------------------------------------
  36 --  Author: Eugene V. Melaragno <aldomel@ix.netcom.com> 2000
  37 --  Version Control
  38 --  $Revision: 1.5 $
  39 --  $Date: 2011/03/23 00:40:33 $
  40 --  Binding Version 01.00
  41 ------------------------------------------------------------------------------
  42 with ncurses2.util; use ncurses2.util;
  43 with Terminal_Interface.Curses; use Terminal_Interface.Curses;
  44 with Terminal_Interface.Curses.Trace; use Terminal_Interface.Curses.Trace;
  45 with Terminal_Interface.Curses.Menus; use Terminal_Interface.Curses.Menus;
  46
  47 with Ada.Strings.Bounded;
  48
  49 --  interactively set the trace level
  50
  51 procedure ncurses2.trace_set is
  52
  53    function menu_virtualize (c : Key_Code) return Key_Code;
  54    function subset (super, sub : Trace_Attribute_Set) return Boolean;
  55    function trace_or (a, b : Trace_Attribute_Set) return Trace_Attribute_Set;
  56    function trace_num (tlevel : Trace_Attribute_Set) return String;
  57    function tracetrace (tlevel : Trace_Attribute_Set) return String;
  58    function run_trace_menu (m : Menu; count : Integer) return Boolean;
  59
  60    function menu_virtualize (c : Key_Code) return Key_Code is
  61    begin
  62       case c is
  63          when Character'Pos (newl) | Key_Exit =>
  64             return Menu_Request_Code'Last + 1; --  MAX_COMMAND? TODO
  65          when Character'Pos ('u') =>
  66             return M_ScrollUp_Line;
  67          when Character'Pos ('d') =>
  68             return M_ScrollDown_Line;
  69          when Character'Pos ('b') | Key_Next_Page =>
  70             return M_ScrollUp_Page;
  71          when Character'Pos ('f') | Key_Previous_Page =>
  72             return M_ScrollDown_Page;
  73          when Character'Pos ('n') | Key_Cursor_Down =>
  74             return M_Next_Item;
  75          when Character'Pos ('p') | Key_Cursor_Up =>
  76             return M_Previous_Item;
  77          when Character'Pos (' ') =>
  78             return M_Toggle_Item;
  79          when Key_Mouse =>
  80             return c;
  81          when others =>
  82             Beep;
  83             return c;
  84       end case;
  85    end menu_virtualize;
  86
  87    type string_a is access String;
  88    type tbl_entry is record
  89       name : string_a;
  90       mask : Trace_Attribute_Set;
  91    end record;
  92
  93    t_tbl : constant array (Positive range <>) of tbl_entry :=
  94      (
  95       (new String'("Disable"),
  96        Trace_Disable),
  97       (new String'("Times"),
  98        Trace_Attribute_Set'(Times => True, others => False)),
  99       (new String'("Tputs"),
 100        Trace_Attribute_Set'(Tputs => True, others => False)),
 101       (new String'("Update"),
 102        Trace_Attribute_Set'(Update => True, others => False)),
 103       (new String'("Cursor_Move"),
 104        Trace_Attribute_Set'(Cursor_Move => True, others => False)),
 105       (new String'("Character_Output"),
 106        Trace_Attribute_Set'(Character_Output => True, others => False)),
 107       (new String'("Ordinary"),
 108        Trace_Ordinary),
 109       (new String'("Calls"),
 110        Trace_Attribute_Set'(Calls => True, others => False)),
 111       (new String'("Virtual_Puts"),
 112        Trace_Attribute_Set'(Virtual_Puts => True, others => False)),
 113       (new String'("Input_Events"),
 114        Trace_Attribute_Set'(Input_Events => True, others => False)),
 115       (new String'("TTY_State"),
 116        Trace_Attribute_Set'(TTY_State => True, others => False)),
 117       (new String'("Internal_Calls"),
 118        Trace_Attribute_Set'(Internal_Calls => True, others => False)),
 119       (new String'("Character_Calls"),
 120        Trace_Attribute_Set'(Character_Calls => True, others => False)),
 121       (new String'("Termcap_TermInfo"),
 122        Trace_Attribute_Set'(Termcap_TermInfo => True, others => False)),
 123       (new String'("Maximium"),
 124        Trace_Maximum)
 125       );
 126
 127    package BS is new Ada.Strings.Bounded.Generic_Bounded_Length (300);
 128
 129    function subset (super, sub : Trace_Attribute_Set) return Boolean is
 130    begin
 131       if
 132         (super.Times or not sub.Times) and
 133         (super.Tputs or not sub.Tputs) and
 134         (super.Update or not sub.Update) and
 135         (super.Cursor_Move or not sub.Cursor_Move) and
 136         (super.Character_Output or not sub.Character_Output) and
 137         (super.Calls or not sub.Calls) and
 138         (super.Virtual_Puts or not sub.Virtual_Puts) and
 139         (super.Input_Events or not sub.Input_Events) and
 140         (super.TTY_State or not sub.TTY_State) and
 141         (super.Internal_Calls or not sub.Internal_Calls) and
 142         (super.Character_Calls or not sub.Character_Calls) and
 143         (super.Termcap_TermInfo or not sub.Termcap_TermInfo) and
 144         True then
 145          return True;
 146       else
 147          return False;
 148       end if;
 149    end subset;
 150
 151    function trace_or (a, b : Trace_Attribute_Set) return Trace_Attribute_Set is
 152       retval : Trace_Attribute_Set := Trace_Disable;
 153    begin
 154       retval.Times := (a.Times or b.Times);
 155       retval.Tputs := (a.Tputs or b.Tputs);
 156       retval.Update := (a.Update or b.Update);
 157       retval.Cursor_Move := (a.Cursor_Move or b.Cursor_Move);
 158       retval.Character_Output := (a.Character_Output or b.Character_Output);
 159       retval.Calls := (a.Calls or b.Calls);
 160       retval.Virtual_Puts := (a.Virtual_Puts or b.Virtual_Puts);
 161       retval.Input_Events := (a.Input_Events or b.Input_Events);
 162       retval.TTY_State := (a.TTY_State or b.TTY_State);
 163       retval.Internal_Calls := (a.Internal_Calls or b.Internal_Calls);
 164       retval.Character_Calls := (a.Character_Calls or b.Character_Calls);
 165       retval.Termcap_TermInfo := (a.Termcap_TermInfo or b.Termcap_TermInfo);
 166
 167       return retval;
 168    end trace_or;
 169
 170    --  Print the hexadecimal value of the mask so
 171    --  users can set it from the command line.
 172
 173    function trace_num (tlevel : Trace_Attribute_Set) return String is
 174       result : Integer := 0;
 175       m : Integer := 1;
 176    begin
 177
 178       if tlevel.Times then
 179          result := result + m;
 180       end if;
 181       m := m * 2;
 182
 183       if tlevel.Tputs then
 184          result := result + m;
 185       end if;
 186       m := m * 2;
 187
 188       if tlevel.Update then
 189          result := result + m;
 190       end if;
 191       m := m * 2;
 192
 193       if tlevel.Cursor_Move then
 194          result := result + m;
 195       end if;
 196       m := m * 2;
 197
 198       if tlevel.Character_Output then
 199          result := result + m;
 200       end if;
 201       m := m * 2;
 202
 203       if tlevel.Calls then
 204          result := result + m;
 205       end if;
 206       m := m * 2;
 207
 208       if tlevel.Virtual_Puts then
 209          result := result + m;
 210       end if;
 211       m := m * 2;
 212
 213       if tlevel.Input_Events then
 214          result := result + m;
 215       end if;
 216       m := m * 2;
 217
 218       if tlevel.TTY_State then
 219          result := result + m;
 220       end if;
 221       m := m * 2;
 222
 223       if tlevel.Internal_Calls then
 224          result := result + m;
 225       end if;
 226       m := m * 2;
 227
 228       if tlevel.Character_Calls then
 229          result := result + m;
 230       end if;
 231       m := m * 2;
 232
 233       if tlevel.Termcap_TermInfo then
 234          result := result + m;
 235       end if;
 236       m := m * 2;
 237       return result'Img;
 238    end trace_num;
 239
 240    function tracetrace (tlevel : Trace_Attribute_Set) return String is
 241
 242       use BS;
 243       buf : Bounded_String := To_Bounded_String ("");
 244    begin
 245       --  The C version prints the hexadecimal value of the mask, we
 246       --  won't do that here because this is Ada.
 247
 248       if tlevel = Trace_Disable then
 249          Append (buf, "Trace_Disable");
 250       else
 251
 252          if subset (tlevel,
 253                     Trace_Attribute_Set'(Times => True, others => False)) then
 254             Append (buf, "Times");
 255             Append (buf, ", ");
 256          end if;
 257
 258          if subset (tlevel,
 259                     Trace_Attribute_Set'(Tputs => True, others => False)) then
 260             Append (buf, "Tputs");
 261             Append (buf, ", ");
 262          end if;
 263
 264          if subset (tlevel,
 265                     Trace_Attribute_Set'(Update => True, others => False)) then
 266             Append (buf, "Update");
 267             Append (buf, ", ");
 268          end if;
 269
 270          if subset (tlevel,
 271                     Trace_Attribute_Set'(Cursor_Move => True,
 272                                          others => False)) then
 273             Append (buf, "Cursor_Move");
 274             Append (buf, ", ");
 275          end if;
 276
 277          if subset (tlevel,
 278                     Trace_Attribute_Set'(Character_Output => True,
 279                                          others => False)) then
 280             Append (buf, "Character_Output");
 281             Append (buf, ", ");
 282          end if;
 283
 284          if subset (tlevel,
 285                     Trace_Ordinary) then
 286             Append (buf, "Ordinary");
 287             Append (buf, ", ");
 288          end if;
 289
 290          if subset (tlevel,
 291                     Trace_Attribute_Set'(Calls => True, others => False)) then
 292             Append (buf, "Calls");
 293             Append (buf, ", ");
 294          end if;
 295
 296          if subset (tlevel,
 297                     Trace_Attribute_Set'(Virtual_Puts => True,
 298                                          others => False)) then
 299             Append (buf, "Virtual_Puts");
 300             Append (buf, ", ");
 301          end if;
 302
 303          if subset (tlevel,
 304                     Trace_Attribute_Set'(Input_Events => True,
 305                                          others => False)) then
 306             Append (buf, "Input_Events");
 307             Append (buf, ", ");
 308          end if;
 309
 310          if subset (tlevel,
 311                     Trace_Attribute_Set'(TTY_State => True,
 312                                          others => False)) then
 313             Append (buf, "TTY_State");
 314             Append (buf, ", ");
 315          end if;
 316
 317          if subset (tlevel,
 318                     Trace_Attribute_Set'(Internal_Calls => True,
 319                                          others => False)) then
 320             Append (buf, "Internal_Calls");
 321             Append (buf, ", ");
 322          end if;
 323
 324          if subset (tlevel,
 325                     Trace_Attribute_Set'(Character_Calls => True,
 326                                          others => False)) then
 327             Append (buf, "Character_Calls");
 328             Append (buf, ", ");
 329          end if;
 330
 331          if subset (tlevel,
 332                     Trace_Attribute_Set'(Termcap_TermInfo => True,
 333                                          others => False)) then
 334             Append (buf, "Termcap_TermInfo");
 335             Append (buf, ", ");
 336          end if;
 337
 338          if subset (tlevel,
 339                     Trace_Maximum) then
 340             Append (buf, "Maximium");
 341             Append (buf, ", ");
 342          end if;
 343       end if;
 344
 345       if To_String (buf) (Length (buf) - 1) = ',' then
 346          Delete (buf, Length (buf) - 1, Length (buf));
 347       end if;
 348
 349       return To_String (buf);
 350    end tracetrace;
 351
 352    function run_trace_menu (m : Menu; count : Integer) return Boolean is
 353       i, p : Item;
 354       changed : Boolean;
 355       c, v : Key_Code;
 356    begin
 357       loop
 358          changed := (count /= 0);
 359          c := Getchar (Get_Window (m));
 360          v := menu_virtualize (c);
 361          case Driver (m, v) is
 362             when Unknown_Request =>
 363                return False;
 364             when others =>
 365                i := Current (m);
 366                if i = Menus.Items (m, 1) then -- the first item
 367                   for n in t_tbl'First + 1 .. t_tbl'Last loop
 368                      if Value (i) then
 369                         Set_Value (i, False);
 370                         changed := True;
 371                      end if;
 372                   end loop;
 373                else
 374                   for n in t_tbl'First + 1 .. t_tbl'Last loop
 375                      p := Menus.Items (m, n);
 376                      if Value (p) then
 377                         Set_Value (Menus.Items (m, 1), False);
 378                         changed := True;
 379                         exit;
 380                      end if;
 381                   end loop;
 382                end if;
 383                if not changed then
 384                   return True;
 385                end if;
 386          end case;
 387       end loop;
 388    end run_trace_menu;
 389
 390    nc_tracing, mask : Trace_Attribute_Set;
 391    pragma Import (C, nc_tracing, "_nc_tracing");
 392    items_a : constant Item_Array_Access :=
 393      new Item_Array (t_tbl'First .. t_tbl'Last + 1);
 394    mrows : Line_Count;
 395    mcols : Column_Count;
 396    menuwin : Window;
 397    menu_y : constant Line_Position := 8;
 398    menu_x : constant Column_Position := 8;
 399    ip : Item;
 400    m : Menu;
 401    count : Integer;
 402    newtrace : Trace_Attribute_Set;
 403 begin
 404    Add (Line => 0, Column => 0, Str => "Interactively set trace level:");
 405    Add (Line => 2, Column => 0,
 406         Str => "  Press space bar to toggle a selection.");
 407    Add (Line => 3, Column => 0,
 408         Str => "  Use up and down arrow to move the select bar.");
 409    Add (Line => 4, Column => 0,
 410         Str => "  Press return to set the trace level.");
 411    Add (Line => 6, Column => 0, Str => "(Current trace level is ");
 412    Add (Str => tracetrace (nc_tracing) & " numerically: " &
 413         trace_num (nc_tracing));
 414    Add (Ch => ')');
 415
 416    Refresh;
 417
 418    for n in t_tbl'Range loop
 419       items_a.all (n) := New_Item (t_tbl (n).name.all);
 420    end loop;
 421    items_a.all (t_tbl'Last + 1) := Null_Item;
 422
 423    m := New_Menu (items_a);
 424
 425    Set_Format (m, 16, 2);
 426    Scale (m, mrows, mcols);
 427
 428    Switch_Options (m, (One_Valued => True, others => False), On => False);
 429    menuwin := New_Window (mrows + 2, mcols + 2, menu_y, menu_x);
 430    Set_Window (m, menuwin);
 431    Set_KeyPad_Mode (menuwin, SwitchOn => True);
 432    Box (menuwin);
 433
 434    Set_Sub_Window (m, Derived_Window (menuwin, mrows, mcols, 1, 1));
 435
 436    Post (m);
 437
 438    for n in t_tbl'Range loop
 439       ip := Items (m, n);
 440       mask := t_tbl (n).mask;
 441       if mask = Trace_Disable then
 442          Set_Value (ip, nc_tracing = Trace_Disable);
 443       elsif subset (sub => mask, super => nc_tracing) then
 444          Set_Value (ip, True);
 445       end if;
 446    end loop;
 447
 448    count := 1;
 449    while run_trace_menu (m, count) loop
 450       count := count + 1;
 451    end loop;
 452
 453    newtrace := Trace_Disable;
 454    for n in t_tbl'Range loop
 455       ip := Items (m, n);
 456       if Value (ip) then
 457          mask := t_tbl (n).mask;
 458          newtrace := trace_or (newtrace, mask);
 459       end if;
 460    end loop;
 461
 462    Trace_On (newtrace);
 463    Trace_Put ("trace level interactively set to " &
 464               tracetrace (nc_tracing));
 465
 466    Move_Cursor (Line => Lines - 4, Column => 0);
 467    Add (Str => "Trace level is ");
 468    Add (Str => tracetrace (nc_tracing));
 469    Add (Ch => newl);
 470    Pause; -- was just Add(); Getchar
 471
 472    Post (m, False);
 473    --  menuwin has subwindows I think, which makes an error.
 474    declare begin
 475       Delete (menuwin);
 476    exception when Curses_Exception => null; end;
 477
 478    --  free_menu(m);
 479    --  free_item()
 480 end ncurses2.trace_set;