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