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
  31 /* This is a point definition.  */
  32 struct tui_point
  33 {
  34   int x, y;
  35 };
  36
  37 /* Generic window information.  */
  38 struct tui_gen_win_info
  39 {
  40 protected:
  41
  42   explicit tui_gen_win_info (enum tui_win_type t)
  43     : type (t)
  44   {
  45   }
  46
  47 public:
  48
  49   virtual ~tui_gen_win_info ();
  50
  51   /* Call to refresh this window.  */
  52   virtual void refresh_window ();
  53
  54   /* Make this window visible or invisible.  */
  55   virtual void make_visible (bool visible);
  56
  57   /* Return the name of this type of window.  */
  58   virtual const char *name () const
  59   {
  60     return "";
  61   }
  62
  63   /* Reset this window.  The parameters are used to set the window's
  64      size and position.  */
  65   virtual void reset (int height, int width,
  66                       int origin_x, int origin_y);
  67
  68   /* Window handle.  */
  69   WINDOW *handle = nullptr;
  70   /* Type of window.  */
  71   enum tui_win_type type;
  72   /* Window width.  */
  73   int width = 0;
  74   /* Window height.  */
  75   int height = 0;
  76   /* Origin of window.  */
  77   struct tui_point origin = {0, 0};
  78   /* Viewport height.  */
  79   int viewport_height = 0;
  80   /* Index of last visible line.  */
  81   int last_visible_line = 0;
  82   /* Whether the window is visible or not.  */
  83   bool is_visible = false;
  84   /* Window title to display.  */
  85   char *title = nullptr;
  86 };
  87
  88 /* Whether or not a window should be drawn with a box.  */
  89 enum tui_box
  90 {
  91   DONT_BOX_WINDOW = 0,
  92   BOX_WINDOW
  93 };
  94
  95 /* Constant definitions.  */
  96 #define DEFAULT_TAB_LEN         8
  97 #define NO_SRC_STRING           "[ No Source Available ]"
  98 #define NO_DISASSEM_STRING      "[ No Assembly Available ]"
  99 #define NO_REGS_STRING          "[ Register Values Unavailable ]"
 100 #define NO_DATA_STRING          "[ No Data Values Displayed ]"
 101 #define SRC_NAME                "src"
 102 #define CMD_NAME                "cmd"
 103 #define DATA_NAME               "regs"
 104 #define DISASSEM_NAME           "asm"
 105 #define HILITE                  TRUE
 106 #define NO_HILITE               FALSE
 107 #define MIN_WIN_HEIGHT          3
 108 #define MIN_CMD_WIN_HEIGHT      3
 109
 110 /* Strings to display in the TUI status line.  */
 111 #define PROC_PREFIX             "In: "
 112 #define LINE_PREFIX             "L"
 113 #define PC_PREFIX               "PC: "
 114 #define SINGLE_KEY              "(SingleKey)"
 115
 116 /* Minimum/Maximum length of some fields displayed in the TUI status
 117    line.  */
 118 #define MIN_LINE_WIDTH     4    /* Use at least 4 digits for line
 119                                    numbers.  */
 120 #define MIN_PROC_WIDTH    12
 121 #define MAX_TARGET_WIDTH  10
 122 #define MAX_PID_WIDTH     19
 123
 124 /* The kinds of layouts available.  */
 125 enum tui_layout_type
 126 {
 127   SRC_COMMAND,
 128   DISASSEM_COMMAND,
 129   SRC_DISASSEM_COMMAND,
 130   SRC_DATA_COMMAND,
 131   DISASSEM_DATA_COMMAND,
 132   UNDEFINED_LAYOUT
 133 };
 134
 135 enum tui_line_or_address_kind
 136 {
 137   LOA_LINE,
 138   LOA_ADDRESS
 139 };
 140
 141 /* Structure describing source line or line address.  */
 142 struct tui_line_or_address
 143 {
 144   enum tui_line_or_address_kind loa;
 145   union
 146     {
 147       int line_no;
 148       CORE_ADDR addr;
 149     } u;
 150 };
 151
 152 /* Current Layout definition.  */
 153 struct tui_layout_def
 154 {
 155   enum tui_win_type display_mode;
 156 };
 157
 158 /* Flags to tell what kind of breakpoint is at current line.  */
 159 enum tui_bp_flag
 160 {
 161   TUI_BP_ENABLED = 0x01,
 162   TUI_BP_DISABLED = 0x02,
 163   TUI_BP_HIT = 0x04,
 164   TUI_BP_CONDITIONAL = 0x08,
 165   TUI_BP_HARDWARE = 0x10
 166 };
 167
 168 DEF_ENUM_FLAGS_TYPE (enum tui_bp_flag, tui_bp_flags);
 169
 170 /* Elements in the Source/Disassembly Window.  */
 171 struct tui_source_element
 172 {
 173   tui_source_element ()
 174   {
 175     line_or_addr.loa = LOA_LINE;
 176     line_or_addr.u.line_no = 0;
 177   }
 178
 179   ~tui_source_element ()
 180   {
 181     xfree (line);
 182   }
 183
 184   char *line = nullptr;
 185   struct tui_line_or_address line_or_addr;
 186   bool is_exec_point = false;
 187   tui_bp_flags break_mode = 0;
 188 };
 189
 190
 191 #ifdef PATH_MAX
 192 # define MAX_LOCATOR_ELEMENT_LEN        PATH_MAX
 193 #else
 194 # define MAX_LOCATOR_ELEMENT_LEN        1024
 195 #endif
 196
 197 /* Position of breakpoint markers in the exec info string.  */
 198 #define TUI_BP_HIT_POS      0
 199 #define TUI_BP_BREAK_POS    1
 200 #define TUI_EXEC_POS        2
 201 #define TUI_EXECINFO_SIZE   4
 202
 203 typedef char tui_exec_info_content[TUI_EXECINFO_SIZE];
 204
 205 /* Execution info window class.  */
 206
 207 struct tui_exec_info_window : public tui_gen_win_info
 208 {
 209   tui_exec_info_window ()
 210     : tui_gen_win_info (EXEC_INFO_WIN)
 211   {
 212   }
 213
 214   ~tui_exec_info_window () override
 215   {
 216     xfree (m_content);
 217   }
 218
 219   /* Get or allocate contents.  */
 220   tui_exec_info_content *maybe_allocate_content (int n_elements);
 221
 222   /* Return the contents.  */
 223   const tui_exec_info_content *get_content () const
 224   {
 225     return m_content;
 226   }
 227
 228 private:
 229
 230   tui_exec_info_content *m_content = nullptr;
 231 };
 232
 233 /* Locator window class.  */
 234
 235 struct tui_locator_window : public tui_gen_win_info
 236 {
 237   tui_locator_window ()
 238     : tui_gen_win_info (LOCATOR_WIN)
 239   {
 240     full_name[0] = 0;
 241     proc_name[0] = 0;
 242   }
 243
 244   char full_name[MAX_LOCATOR_ELEMENT_LEN];
 245   char proc_name[MAX_LOCATOR_ELEMENT_LEN];
 246   int line_no = 0;
 247   CORE_ADDR addr = 0;
 248   /* Architecture associated with code at this location.  */
 249   struct gdbarch *gdbarch = nullptr;
 250 };
 251
 252 /* This defines information about each logical window.  */
 253 struct tui_win_info : public tui_gen_win_info
 254 {
 255 protected:
 256
 257   explicit tui_win_info (enum tui_win_type type);
 258   DISABLE_COPY_AND_ASSIGN (tui_win_info);
 259
 260   /* Scroll the contents vertically.  This is only called via
 261      forward_scroll and backward_scroll.  */
 262   virtual void do_scroll_vertical (int num_to_scroll) = 0;
 263
 264   /* Scroll the contents horizontally.  This is only called via
 265      left_scroll and right_scroll.  */
 266   virtual void do_scroll_horizontal (int num_to_scroll) = 0;
 267
 268   /* Called after make_visible_with_new_height sets the new height.
 269      Should update the window.  */
 270   virtual void do_make_visible_with_new_height () = 0;
 271
 272 public:
 273
 274   ~tui_win_info () override
 275   {
 276   }
 277
 278   /* Clear the pertinent detail in the window.  */
 279   virtual void clear_detail () = 0;
 280
 281   /* Called after all the TUI windows are refreshed, to let this
 282      window have a chance to update itself further.  */
 283   virtual void refresh_all ()
 284   {
 285   }
 286
 287   /* Called after a TUI window is given a new height; this updates any
 288      related auxiliary windows.  */
 289   virtual void set_new_height (int height)
 290   {
 291   }
 292
 293   /* Compute the maximum height of this window.  */
 294   virtual int max_height () const;
 295
 296   /* Called after the tab width has been changed.  */
 297   virtual void update_tab_width ()
 298   {
 299   }
 300
 301   /* Make the window visible after the height has been changed.  */
 302   void make_visible_with_new_height ();
 303
 304   /* Set whether this window is highglighted.  */
 305   void set_highlight (bool highlight)
 306   {
 307     is_highlighted = highlight;
 308   }
 309
 310   /* Methods to scroll the contents of this window.  Note that they
 311      are named with "_scroll" coming at the end because the more
 312      obvious "scroll_forward" is defined as a macro in term.h.  */
 313   void forward_scroll (int num_to_scroll);
 314   void backward_scroll (int num_to_scroll);
 315   void left_scroll (int num_to_scroll);
 316   void right_scroll (int num_to_scroll);
 317
 318   /* Return true if this window can be scrolled, false otherwise.  */
 319   virtual bool can_scroll () const
 320   {
 321     return true;
 322   }
 323
 324   /* Can this window ever be highlighted?  */
 325   bool can_highlight = true;
 326
 327   /* Is this window highlighted?  */
 328   bool is_highlighted = false;
 329 };
 330
 331 /* The base class for all source-like windows, namely the source and
 332    disassembly windows.  */
 333
 334 struct tui_source_window_base : public tui_win_info
 335 {
 336 protected:
 337   explicit tui_source_window_base (enum tui_win_type type);
 338   ~tui_source_window_base () override;
 339   DISABLE_COPY_AND_ASSIGN (tui_source_window_base);
 340
 341   void do_scroll_horizontal (int num_to_scroll) override;
 342   void do_make_visible_with_new_height () override;
 343
 344 public:
 345
 346   void clear_detail () override;
 347
 348   void make_visible (bool visible) override;
 349   void refresh_window () override;
 350   void refresh_all () override;
 351
 352   /* Refill the source window's source cache and update it.  If this
 353      is a disassembly window, then just update it.  */
 354   void refill ();
 355
 356   /* Set the location of the execution point.  */
 357   void set_is_exec_point_at (struct tui_line_or_address l);
 358
 359   void set_new_height (int height) override;
 360
 361   void update_tab_width () override;
 362
 363   /* Return true if the location LOC corresponds to the line number
 364      LINE_NO in this source window; false otherwise.  */
 365   virtual bool location_matches_p (struct bp_location *loc, int line_no) = 0;
 366
 367   void reset (int height, int width,
 368               int origin_x, int origin_y) override;
 369
 370   /* Does the locator belong to this window?  */
 371   bool m_has_locator = false;
 372   /* Execution information window.  */
 373   struct tui_exec_info_window *execution_info;
 374   /* Used for horizontal scroll.  */
 375   int horizontal_offset = 0;
 376   struct tui_line_or_address start_line_or_addr;
 377
 378   /* It is the resolved form as returned by symtab_to_fullname.  */
 379   char *fullname = nullptr;
 380
 381   /* Architecture associated with code at this location.  */
 382   struct gdbarch *gdbarch = nullptr;
 383
 384   std::vector<tui_source_element> content;
 385 };
 386
 387 /* A TUI source window.  */
 388
 389 struct tui_source_window : public tui_source_window_base
 390 {
 391   tui_source_window ();
 392   ~tui_source_window ();
 393
 394   DISABLE_COPY_AND_ASSIGN (tui_source_window);
 395
 396   const char *name () const override
 397   {
 398     return SRC_NAME;
 399   }
 400
 401   bool location_matches_p (struct bp_location *loc, int line_no) override;
 402
 403   bool showing_source_p (const char *filename) const;
 404
 405 protected:
 406
 407   void do_scroll_vertical (int num_to_scroll) override;
 408
 409 private:
 410
 411   void style_changed ();
 412
 413   /* A token used to register and unregister an observer.  */
 414   gdb::observers::token m_observable;
 415 };
 416
 417 extern int tui_win_is_auxiliary (enum tui_win_type win_type);
 418
 419
 420 /* Global Data.  */
 421 extern struct tui_win_info *tui_win_list[MAX_MAJOR_WINDOWS];
 422
 423 #define TUI_SRC_WIN     ((tui_source_window *) tui_win_list[SRC_WIN])
 424 #define TUI_DISASM_WIN  ((tui_source_window_base *) tui_win_list[DISASSEM_WIN])
 425 #define TUI_DATA_WIN    ((tui_data_window *) tui_win_list[DATA_WIN])
 426 #define TUI_CMD_WIN     ((tui_cmd_window *) tui_win_list[CMD_WIN])
 427
 428 /* An iterator that iterates over all windows.  */
 429
 430 class tui_window_iterator
 431 {
 432 public:
 433
 434   typedef tui_window_iterator self_type;
 435   typedef struct tui_win_info *value_type;
 436   typedef struct tui_win_info *&reference;
 437   typedef struct tui_win_info **pointer;
 438   typedef std::forward_iterator_tag iterator_category;
 439   typedef int difference_type;
 440
 441   explicit tui_window_iterator (enum tui_win_type type)
 442     : m_type (type)
 443   {
 444     advance ();
 445   }
 446
 447   tui_window_iterator ()
 448     : m_type (MAX_MAJOR_WINDOWS)
 449   {
 450   }
 451
 452   bool operator!= (const self_type &other) const
 453   {
 454     return m_type != other.m_type;
 455   }
 456
 457   value_type operator* () const
 458   {
 459     gdb_assert (m_type < MAX_MAJOR_WINDOWS);
 460     return tui_win_list[m_type];
 461   }
 462
 463   self_type &operator++ ()
 464   {
 465     ++m_type;
 466     advance ();
 467     return *this;
 468   }
 469
 470 private:
 471
 472   void advance ()
 473   {
 474     while (m_type < MAX_MAJOR_WINDOWS && tui_win_list[m_type] == nullptr)
 475       ++m_type;
 476   }
 477
 478   int m_type;
 479 };
 480
 481 /* A range adapter for iterating over TUI windows.  */
 482
 483 struct all_tui_windows
 484 {
 485   tui_window_iterator begin () const
 486   {
 487     return tui_window_iterator (SRC_WIN);
 488   }
 489
 490   tui_window_iterator end () const
 491   {
 492     return tui_window_iterator ();
 493   }
 494 };
 495
 496
 497 /* Data Manipulation Functions.  */
 498 extern void tui_initialize_static_data (void);
 499 extern struct tui_win_info *tui_partial_win_by_name (const char *);
 500 extern enum tui_layout_type tui_current_layout (void);
 501 extern void tui_set_current_layout_to (enum tui_layout_type);
 502 extern int tui_term_height (void);
 503 extern void tui_set_term_height_to (int);
 504 extern int tui_term_width (void);
 505 extern void tui_set_term_width_to (int);
 506 extern struct tui_locator_window *tui_locator_win_info_ptr (void);
 507 extern std::vector<tui_source_window_base *> &tui_source_windows ();
 508 extern void tui_clear_source_windows (void);
 509 extern void tui_clear_source_windows_detail (void);
 510 extern void tui_add_to_source_windows (struct tui_source_window_base *);
 511 extern struct tui_win_info *tui_win_with_focus (void);
 512 extern void tui_set_win_with_focus (struct tui_win_info *);
 513 extern struct tui_layout_def *tui_layout_def (void);
 514 extern int tui_win_resized (void);
 515 extern void tui_set_win_resized_to (int);
 516
 517 extern struct tui_win_info *tui_next_win (struct tui_win_info *);
 518 extern struct tui_win_info *tui_prev_win (struct tui_win_info *);
 519
 520 extern unsigned int tui_tab_width;
 521
 522 #endif /* TUI_TUI_DATA_H */