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_base;
  31 struct tui_source_window;
  32
  33 /* This is a point definition.  */
  34 struct tui_point
  35 {
  36   int x, y;
  37 };
  38
  39 /* Generic window information.  */
  40 struct tui_gen_win_info
  41 {
  42 protected:
  43
  44   explicit tui_gen_win_info (enum tui_win_type t)
  45     : type (t)
  46   {
  47   }
  48
  49 public:
  50
  51   virtual ~tui_gen_win_info ();
  52
  53   /* Call to refresh this window.  */
  54   virtual void refresh_window ();
  55
  56   /* Make this window visible or invisible.  */
  57   virtual void make_visible (bool visible);
  58
  59   /* Return the name of this type of window.  */
  60   virtual const char *name () const
  61   {
  62     return "";
  63   }
  64
  65   /* Resize this window.  The parameters are used to set the window's
  66      size and position.  */
  67   virtual void resize (int height, int width,
  68                        int origin_x, int origin_y);
  69
  70   /* Return true if this can be boxed.  */
  71   virtual bool can_box () const
  72   {
  73     return false;
  74   }
  75
  76   /* Window handle.  */
  77   WINDOW *handle = nullptr;
  78   /* Type of window.  */
  79   enum tui_win_type type;
  80   /* Window width.  */
  81   int width = 0;
  82   /* Window height.  */
  83   int height = 0;
  84   /* Origin of window.  */
  85   struct tui_point origin = {0, 0};
  86   /* Viewport height.  */
  87   int viewport_height = 0;
  88   /* Whether the window is visible or not.  */
  89   bool is_visible = false;
  90   /* Window title to display.  */
  91   char *title = nullptr;
  92 };
  93
  94 /* Constant definitions.  */
  95 #define DEFAULT_TAB_LEN         8
  96 #define NO_SRC_STRING           "[ No Source Available ]"
  97 #define NO_DISASSEM_STRING      "[ No Assembly Available ]"
  98 #define NO_REGS_STRING          "[ Register Values Unavailable ]"
  99 #define NO_DATA_STRING          "[ No Data Values Displayed ]"
 100 #define SRC_NAME                "src"
 101 #define CMD_NAME                "cmd"
 102 #define DATA_NAME               "regs"
 103 #define DISASSEM_NAME           "asm"
 104 #define HILITE                  TRUE
 105 #define NO_HILITE               FALSE
 106 #define MIN_WIN_HEIGHT          3
 107 #define MIN_CMD_WIN_HEIGHT      3
 108
 109 /* Strings to display in the TUI status line.  */
 110 #define PROC_PREFIX             "In: "
 111 #define LINE_PREFIX             "L"
 112 #define PC_PREFIX               "PC: "
 113 #define SINGLE_KEY              "(SingleKey)"
 114
 115 /* Minimum/Maximum length of some fields displayed in the TUI status
 116    line.  */
 117 #define MIN_LINE_WIDTH     4    /* Use at least 4 digits for line
 118                                    numbers.  */
 119 #define MIN_PROC_WIDTH    12
 120 #define MAX_TARGET_WIDTH  10
 121 #define MAX_PID_WIDTH     19
 122
 123 /* The kinds of layouts available.  */
 124 enum tui_layout_type
 125 {
 126   SRC_COMMAND,
 127   DISASSEM_COMMAND,
 128   SRC_DISASSEM_COMMAND,
 129   SRC_DATA_COMMAND,
 130   DISASSEM_DATA_COMMAND,
 131   UNDEFINED_LAYOUT
 132 };
 133
 134 enum tui_line_or_address_kind
 135 {
 136   LOA_LINE,
 137   LOA_ADDRESS
 138 };
 139
 140 /* Structure describing source line or line address.  */
 141 struct tui_line_or_address
 142 {
 143   enum tui_line_or_address_kind loa;
 144   union
 145     {
 146       int line_no;
 147       CORE_ADDR addr;
 148     } u;
 149 };
 150
 151 /* This defines information about each logical window.  */
 152 struct tui_win_info : public tui_gen_win_info
 153 {
 154 protected:
 155
 156   explicit tui_win_info (enum tui_win_type type);
 157   DISABLE_COPY_AND_ASSIGN (tui_win_info);
 158
 159   /* Scroll the contents vertically.  This is only called via
 160      forward_scroll and backward_scroll.  */
 161   virtual void do_scroll_vertical (int num_to_scroll) = 0;
 162
 163   /* Scroll the contents horizontally.  This is only called via
 164      left_scroll and right_scroll.  */
 165   virtual void do_scroll_horizontal (int num_to_scroll) = 0;
 166
 167   /* Called after make_visible_with_new_height sets the new height.
 168      Should update the window.  */
 169   virtual void do_make_visible_with_new_height () = 0;
 170
 171 public:
 172
 173   ~tui_win_info () override
 174   {
 175   }
 176
 177   /* Called after all the TUI windows are refreshed, to let this
 178      window have a chance to update itself further.  */
 179   virtual void refresh_all ()
 180   {
 181   }
 182
 183   /* Called after a TUI window is given a new height; this updates any
 184      related auxiliary windows.  */
 185   virtual void set_new_height (int height)
 186   {
 187   }
 188
 189   /* Compute the maximum height of this window.  */
 190   virtual int max_height () const;
 191
 192   /* Called after the tab width has been changed.  */
 193   virtual void update_tab_width ()
 194   {
 195   }
 196
 197   /* Function make the target window (and auxiliary windows associated
 198      with the target) invisible, and set the new height and
 199      location.  */
 200   void make_invisible_and_set_new_height (int height);
 201
 202   /* Make the window visible after the height has been changed.  */
 203   void make_visible_with_new_height ();
 204
 205   /* Set whether this window is highglighted.  */
 206   void set_highlight (bool highlight)
 207   {
 208     is_highlighted = highlight;
 209   }
 210
 211   /* Methods to scroll the contents of this window.  Note that they
 212      are named with "_scroll" coming at the end because the more
 213      obvious "scroll_forward" is defined as a macro in term.h.  */
 214   void forward_scroll (int num_to_scroll);
 215   void backward_scroll (int num_to_scroll);
 216   void left_scroll (int num_to_scroll);
 217   void right_scroll (int num_to_scroll);
 218
 219   /* Return true if this window can be scrolled, false otherwise.  */
 220   virtual bool can_scroll () const
 221   {
 222     return true;
 223   }
 224
 225   bool can_box () const override
 226   {
 227     return true;
 228   }
 229
 230   void check_and_display_highlight_if_needed ();
 231
 232   /* Can this window ever be highlighted?  */
 233   bool can_highlight = true;
 234
 235   /* Is this window highlighted?  */
 236   bool is_highlighted = false;
 237 };
 238
 239 extern int tui_win_is_auxiliary (enum tui_win_type win_type);
 240
 241
 242 /* Global Data.  */
 243 extern struct tui_win_info *tui_win_list[MAX_MAJOR_WINDOWS];
 244
 245 #define TUI_SRC_WIN     ((tui_source_window *) tui_win_list[SRC_WIN])
 246 #define TUI_DISASM_WIN  ((tui_source_window_base *) tui_win_list[DISASSEM_WIN])
 247 #define TUI_DATA_WIN    ((tui_data_window *) tui_win_list[DATA_WIN])
 248 #define TUI_CMD_WIN     ((tui_cmd_window *) tui_win_list[CMD_WIN])
 249
 250 /* An iterator that iterates over all windows.  */
 251
 252 class tui_window_iterator
 253 {
 254 public:
 255
 256   typedef tui_window_iterator self_type;
 257   typedef struct tui_win_info *value_type;
 258   typedef struct tui_win_info *&reference;
 259   typedef struct tui_win_info **pointer;
 260   typedef std::forward_iterator_tag iterator_category;
 261   typedef int difference_type;
 262
 263   explicit tui_window_iterator (enum tui_win_type type)
 264     : m_type (type)
 265   {
 266     advance ();
 267   }
 268
 269   tui_window_iterator ()
 270     : m_type (MAX_MAJOR_WINDOWS)
 271   {
 272   }
 273
 274   bool operator!= (const self_type &other) const
 275   {
 276     return m_type != other.m_type;
 277   }
 278
 279   value_type operator* () const
 280   {
 281     gdb_assert (m_type < MAX_MAJOR_WINDOWS);
 282     return tui_win_list[m_type];
 283   }
 284
 285   self_type &operator++ ()
 286   {
 287     ++m_type;
 288     advance ();
 289     return *this;
 290   }
 291
 292 private:
 293
 294   void advance ()
 295   {
 296     while (m_type < MAX_MAJOR_WINDOWS && tui_win_list[m_type] == nullptr)
 297       ++m_type;
 298   }
 299
 300   int m_type;
 301 };
 302
 303 /* A range adapter for iterating over TUI windows.  */
 304
 305 struct all_tui_windows
 306 {
 307   tui_window_iterator begin () const
 308   {
 309     return tui_window_iterator (SRC_WIN);
 310   }
 311
 312   tui_window_iterator end () const
 313   {
 314     return tui_window_iterator ();
 315   }
 316 };
 317
 318
 319 /* Data Manipulation Functions.  */
 320 extern struct tui_win_info *tui_partial_win_by_name (const char *);
 321 extern enum tui_layout_type tui_current_layout (void);
 322 extern int tui_term_height (void);
 323 extern void tui_set_term_height_to (int);
 324 extern int tui_term_width (void);
 325 extern void tui_set_term_width_to (int);
 326 extern struct tui_locator_window *tui_locator_win_info_ptr (void);
 327 extern void tui_clear_source_windows_detail (void);
 328 extern struct tui_win_info *tui_win_with_focus (void);
 329 extern void tui_set_win_with_focus (struct tui_win_info *);
 330 extern int tui_win_resized (void);
 331 extern void tui_set_win_resized_to (int);
 332
 333 extern struct tui_win_info *tui_next_win (struct tui_win_info *);
 334 extern struct tui_win_info *tui_prev_win (struct tui_win_info *);
 335
 336 /* Delete all the invisible windows.  Note that it is an error to call
 337    this when the command window is invisible -- we don't allow the
 338    command window to be removed from the layout.  */
 339 extern void tui_delete_invisible_windows ();
 340
 341 extern unsigned int tui_tab_width;
 342
 343 #endif /* TUI_TUI_DATA_H */