gdb/tui/tui-data.h

   1 /* TUI data manipulation routines.
   2
   3    Copyright (C) 1998-2019 Free Software Foundation, Inc.
   4
   5    Contributed by Hewlett-Packard Company.
   6
   7    This file is part of GDB.
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 3 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  21
  22 #ifndef TUI_TUI_DATA_H
  23 #define TUI_TUI_DATA_H
  24
  25 #include "tui/tui.h"    /* For enum tui_win_type.  */
  26 #include "gdb_curses.h" /* For WINDOW.  */
  27 #include "observable.h"
  28
  29 struct tui_cmd_window;
  30 struct tui_source_window;
  31
  32 /* This is a point definition.  */
  33 struct tui_point
  34 {
  35   int x, y;
  36 };
  37
  38 /* Generic window information.  */
  39 struct tui_gen_win_info
  40 {
  41 protected:
  42
  43   explicit tui_gen_win_info (enum tui_win_type t)
  44     : type (t)
  45   {
  46   }
  47
  48 public:
  49
  50   virtual ~tui_gen_win_info ();
  51
  52   /* Call to refresh this window.  */
  53   virtual void refresh_window ();
  54
  55   /* Make this window visible or invisible.  */
  56   virtual void make_visible (bool visible);
  57
  58   /* Return the name of this type of window.  */
  59   virtual const char *name () const
  60   {
  61     return "";
  62   }
  63
  64   /* Reset this window.  The parameters are used to set the window's
  65      size and position.  */
  66   virtual void reset (int height, int width,
  67                       int origin_x, int origin_y);
  68
  69   /* Window handle.  */
  70   WINDOW *handle = nullptr;
  71   /* Type of window.  */
  72   enum tui_win_type type;
  73   /* Window width.  */
  74   int width = 0;
  75   /* Window height.  */
  76   int height = 0;
  77   /* Origin of window.  */
  78   struct tui_point origin = {0, 0};
  79   /* Viewport height.  */
  80   int viewport_height = 0;
  81   /* Index of last visible line.  */
  82   int last_visible_line = 0;
  83   /* Whether the window is visible or not.  */
  84   bool is_visible = false;
  85   /* Window title to display.  */
  86   char *title = nullptr;
  87 };
  88
  89 /* Whether or not a window should be drawn with a box.  */
  90 enum tui_box
  91 {
  92   DONT_BOX_WINDOW = 0,
  93   BOX_WINDOW
  94 };
  95
  96 /* Constant definitions.  */
  97 #define DEFAULT_TAB_LEN         8
  98 #define NO_SRC_STRING           "[ No Source Available ]"
  99 #define NO_DISASSEM_STRING      "[ No Assembly Available ]"
 100 #define NO_REGS_STRING          "[ Register Values Unavailable ]"
 101 #define NO_DATA_STRING          "[ No Data Values Displayed ]"
 102 #define SRC_NAME                "src"
 103 #define CMD_NAME                "cmd"
 104 #define DATA_NAME               "regs"
 105 #define DISASSEM_NAME           "asm"
 106 #define HILITE                  TRUE
 107 #define NO_HILITE               FALSE
 108 #define MIN_WIN_HEIGHT          3
 109 #define MIN_CMD_WIN_HEIGHT      3
 110
 111 /* Strings to display in the TUI status line.  */
 112 #define PROC_PREFIX             "In: "
 113 #define LINE_PREFIX             "L"
 114 #define PC_PREFIX               "PC: "
 115 #define SINGLE_KEY              "(SingleKey)"
 116
 117 /* Minimum/Maximum length of some fields displayed in the TUI status
 118    line.  */
 119 #define MIN_LINE_WIDTH     4    /* Use at least 4 digits for line
 120                                    numbers.  */
 121 #define MIN_PROC_WIDTH    12
 122 #define MAX_TARGET_WIDTH  10
 123 #define MAX_PID_WIDTH     19
 124
 125 /* The kinds of layouts available.  */
 126 enum tui_layout_type
 127 {
 128   SRC_COMMAND,
 129   DISASSEM_COMMAND,
 130   SRC_DISASSEM_COMMAND,
 131   SRC_DATA_COMMAND,
 132   DISASSEM_DATA_COMMAND,
 133   UNDEFINED_LAYOUT
 134 };
 135
 136 enum tui_line_or_address_kind
 137 {
 138   LOA_LINE,
 139   LOA_ADDRESS
 140 };
 141
 142 /* Structure describing source line or line address.  */
 143 struct tui_line_or_address
 144 {
 145   enum tui_line_or_address_kind loa;
 146   union
 147     {
 148       int line_no;
 149       CORE_ADDR addr;
 150     } u;
 151 };
 152
 153 /* Current Layout definition.  */
 154 struct tui_layout_def
 155 {
 156   enum tui_win_type display_mode;
 157 };
 158
 159 /* Flags to tell what kind of breakpoint is at current line.  */
 160 enum tui_bp_flag
 161 {
 162   TUI_BP_ENABLED = 0x01,
 163   TUI_BP_DISABLED = 0x02,
 164   TUI_BP_HIT = 0x04,
 165   TUI_BP_CONDITIONAL = 0x08,
 166   TUI_BP_HARDWARE = 0x10
 167 };
 168
 169 DEF_ENUM_FLAGS_TYPE (enum tui_bp_flag, tui_bp_flags);
 170
 171 /* Elements in the Source/Disassembly Window.  */
 172 struct tui_source_element
 173 {
 174   tui_source_element ()
 175   {
 176     line_or_addr.loa = LOA_LINE;
 177     line_or_addr.u.line_no = 0;
 178   }
 179
 180   ~tui_source_element ()
 181   {
 182     xfree (line);
 183   }
 184
 185   char *line = nullptr;
 186   struct tui_line_or_address line_or_addr;
 187   bool is_exec_point = false;
 188   tui_bp_flags break_mode = 0;
 189 };
 190
 191
 192 #ifdef PATH_MAX
 193 # define MAX_LOCATOR_ELEMENT_LEN        PATH_MAX
 194 #else
 195 # define MAX_LOCATOR_ELEMENT_LEN        1024
 196 #endif
 197
 198 /* Position of breakpoint markers in the exec info string.  */
 199 #define TUI_BP_HIT_POS      0
 200 #define TUI_BP_BREAK_POS    1
 201 #define TUI_EXEC_POS        2
 202 #define TUI_EXECINFO_SIZE   4
 203
 204 typedef char tui_exec_info_content[TUI_EXECINFO_SIZE];
 205
 206 /* Execution info window class.  */
 207
 208 struct tui_exec_info_window : public tui_gen_win_info
 209 {
 210   tui_exec_info_window ()
 211     : tui_gen_win_info (EXEC_INFO_WIN)
 212   {
 213   }
 214
 215   ~tui_exec_info_window () override
 216   {
 217     xfree (m_content);
 218   }
 219
 220   /* Get or allocate contents.  */
 221   tui_exec_info_content *maybe_allocate_content (int n_elements);
 222
 223   /* Return the contents.  */
 224   const tui_exec_info_content *get_content () const
 225   {
 226     return m_content;
 227   }
 228
 229 private:
 230
 231   tui_exec_info_content *m_content = nullptr;
 232 };
 233
 234 /* Locator window class.  */
 235
 236 struct tui_locator_window : public tui_gen_win_info
 237 {
 238   tui_locator_window ()
 239     : tui_gen_win_info (LOCATOR_WIN)
 240   {
 241     full_name[0] = 0;
 242     proc_name[0] = 0;
 243   }
 244
 245   char full_name[MAX_LOCATOR_ELEMENT_LEN];
 246   char proc_name[MAX_LOCATOR_ELEMENT_LEN];
 247   int line_no = 0;
 248   CORE_ADDR addr = 0;
 249   /* Architecture associated with code at this location.  */
 250   struct gdbarch *gdbarch = nullptr;
 251 };
 252
 253 /* This defines information about each logical window.  */
 254 struct tui_win_info : public tui_gen_win_info
 255 {
 256 protected:
 257
 258   explicit tui_win_info (enum tui_win_type type);
 259   DISABLE_COPY_AND_ASSIGN (tui_win_info);
 260
 261   /* Scroll the contents vertically.  This is only called via
 262      forward_scroll and backward_scroll.  */
 263   virtual void do_scroll_vertical (int num_to_scroll) = 0;
 264
 265   /* Scroll the contents horizontally.  This is only called via
 266      left_scroll and right_scroll.  */
 267   virtual void do_scroll_horizontal (int num_to_scroll) = 0;
 268
 269   /* Called after make_visible_with_new_height sets the new height.
 270      Should update the window.  */
 271   virtual void do_make_visible_with_new_height () = 0;
 272
 273 public:
 274
 275   ~tui_win_info () override
 276   {
 277   }
 278
 279   /* Clear the pertinent detail in the window.  */
 280   virtual void clear_detail () = 0;
 281
 282   /* Called after all the TUI windows are refreshed, to let this
 283      window have a chance to update itself further.  */
 284   virtual void refresh_all ()
 285   {
 286   }
 287
 288   /* Called after a TUI window is given a new height; this updates any
 289      related auxiliary windows.  */
 290   virtual void set_new_height (int height)
 291   {
 292   }
 293
 294   /* Compute the maximum height of this window.  */
 295   virtual int max_height () const;
 296
 297   /* Called after the tab width has been changed.  */
 298   virtual void update_tab_width ()
 299   {
 300   }
 301
 302   /* Make the window visible after the height has been changed.  */
 303   void make_visible_with_new_height ();
 304
 305   /* Set whether this window is highglighted.  */
 306   void set_highlight (bool highlight)
 307   {
 308     is_highlighted = highlight;
 309   }
 310
 311   /* Methods to scroll the contents of this window.  Note that they
 312      are named with "_scroll" coming at the end because the more
 313      obvious "scroll_forward" is defined as a macro in term.h.  */
 314   void forward_scroll (int num_to_scroll);
 315   void backward_scroll (int num_to_scroll);
 316   void left_scroll (int num_to_scroll);
 317   void right_scroll (int num_to_scroll);
 318
 319   /* Return true if this window can be scrolled, false otherwise.  */
 320   virtual bool can_scroll () const
 321   {
 322     return true;
 323   }
 324
 325   /* Can this window ever be highlighted?  */
 326   bool can_highlight = true;
 327
 328   /* Is this window highlighted?  */
 329   bool is_highlighted = false;
 330 };
 331
 332 /* The base class for all source-like windows, namely the source and
 333    disassembly windows.  */
 334
 335 struct tui_source_window_base : public tui_win_info
 336 {
 337 protected:
 338   explicit tui_source_window_base (enum tui_win_type type);
 339   ~tui_source_window_base () override;
 340   DISABLE_COPY_AND_ASSIGN (tui_source_window_base);
 341
 342   void do_scroll_horizontal (int num_to_scroll) override;
 343   void do_make_visible_with_new_height () override;
 344
 345 public:
 346
 347   void clear_detail () override;
 348
 349   void make_visible (bool visible) override;
 350   void refresh_window () override;
 351   void refresh_all () override;
 352
 353   /* Refill the source window's source cache and update it.  If this
 354      is a disassembly window, then just update it.  */
 355   void refill ();
 356
 357   /* Set the location of the execution point.  */
 358   void set_is_exec_point_at (struct tui_line_or_address l);
 359
 360   void set_new_height (int height) override;
 361
 362   void update_tab_width () override;
 363
 364   /* Return true if the location LOC corresponds to the line number
 365      LINE_NO in this source window; false otherwise.  */
 366   virtual bool location_matches_p (struct bp_location *loc, int line_no) = 0;
 367
 368   void reset (int height, int width,
 369               int origin_x, int origin_y) override;
 370
 371   /* Does the locator belong to this window?  */
 372   bool m_has_locator = false;
 373   /* Execution information window.  */
 374   struct tui_exec_info_window *execution_info;
 375   /* Used for horizontal scroll.  */
 376   int horizontal_offset = 0;
 377   struct tui_line_or_address start_line_or_addr;
 378
 379   /* It is the resolved form as returned by symtab_to_fullname.  */
 380   char *fullname = nullptr;
 381
 382   /* Architecture associated with code at this location.  */
 383   struct gdbarch *gdbarch = nullptr;
 384
 385   std::vector<tui_source_element> content;
 386 };
 387
 388 extern int tui_win_is_auxiliary (enum tui_win_type win_type);
 389
 390
 391 /* Global Data.  */
 392 extern struct tui_win_info *tui_win_list[MAX_MAJOR_WINDOWS];
 393
 394 #define TUI_SRC_WIN     ((tui_source_window *) tui_win_list[SRC_WIN])
 395 #define TUI_DISASM_WIN  ((tui_source_window_base *) tui_win_list[DISASSEM_WIN])
 396 #define TUI_DATA_WIN    ((tui_data_window *) tui_win_list[DATA_WIN])
 397 #define TUI_CMD_WIN     ((tui_cmd_window *) tui_win_list[CMD_WIN])
 398
 399 /* An iterator that iterates over all windows.  */
 400
 401 class tui_window_iterator
 402 {
 403 public:
 404
 405   typedef tui_window_iterator self_type;
 406   typedef struct tui_win_info *value_type;
 407   typedef struct tui_win_info *&reference;
 408   typedef struct tui_win_info **pointer;
 409   typedef std::forward_iterator_tag iterator_category;
 410   typedef int difference_type;
 411
 412   explicit tui_window_iterator (enum tui_win_type type)
 413     : m_type (type)
 414   {
 415     advance ();
 416   }
 417
 418   tui_window_iterator ()
 419     : m_type (MAX_MAJOR_WINDOWS)
 420   {
 421   }
 422
 423   bool operator!= (const self_type &other) const
 424   {
 425     return m_type != other.m_type;
 426   }
 427
 428   value_type operator* () const
 429   {
 430     gdb_assert (m_type < MAX_MAJOR_WINDOWS);
 431     return tui_win_list[m_type];
 432   }
 433
 434   self_type &operator++ ()
 435   {
 436     ++m_type;
 437     advance ();
 438     return *this;
 439   }
 440
 441 private:
 442
 443   void advance ()
 444   {
 445     while (m_type < MAX_MAJOR_WINDOWS && tui_win_list[m_type] == nullptr)
 446       ++m_type;
 447   }
 448
 449   int m_type;
 450 };
 451
 452 /* A range adapter for iterating over TUI windows.  */
 453
 454 struct all_tui_windows
 455 {
 456   tui_window_iterator begin () const
 457   {
 458     return tui_window_iterator (SRC_WIN);
 459   }
 460
 461   tui_window_iterator end () const
 462   {
 463     return tui_window_iterator ();
 464   }
 465 };
 466
 467
 468 /* Data Manipulation Functions.  */
 469 extern void tui_initialize_static_data (void);
 470 extern struct tui_win_info *tui_partial_win_by_name (const char *);
 471 extern enum tui_layout_type tui_current_layout (void);
 472 extern void tui_set_current_layout_to (enum tui_layout_type);
 473 extern int tui_term_height (void);
 474 extern void tui_set_term_height_to (int);
 475 extern int tui_term_width (void);
 476 extern void tui_set_term_width_to (int);
 477 extern struct tui_locator_window *tui_locator_win_info_ptr (void);
 478 extern std::vector<tui_source_window_base *> &tui_source_windows ();
 479 extern void tui_clear_source_windows (void);
 480 extern void tui_clear_source_windows_detail (void);
 481 extern void tui_add_to_source_windows (struct tui_source_window_base *);
 482 extern struct tui_win_info *tui_win_with_focus (void);
 483 extern void tui_set_win_with_focus (struct tui_win_info *);
 484 extern struct tui_layout_def *tui_layout_def (void);
 485 extern int tui_win_resized (void);
 486 extern void tui_set_win_resized_to (int);
 487
 488 extern struct tui_win_info *tui_next_win (struct tui_win_info *);
 489 extern struct tui_win_info *tui_prev_win (struct tui_win_info *);
 490
 491 extern unsigned int tui_tab_width;
 492
 493 #endif /* TUI_TUI_DATA_H */