gdb/tui/tui-data.h

   1 /* TUI data manipulation routines.
   2
   3    Copyright (C) 1998-2021 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"
  26 #include "gdb_curses.h" /* For WINDOW.  */
  27 #include "observable.h"
  28
  29 /* A deleter that calls delwin.  */
  30 struct curses_deleter
  31 {
  32   void operator() (WINDOW *win) const
  33   {
  34     delwin (win);
  35   }
  36 };
  37
  38 #define MIN_WIN_HEIGHT          3
  39
  40 /* Generic window information.  */
  41 struct tui_win_info
  42 {
  43 protected:
  44
  45   tui_win_info () = default;
  46   DISABLE_COPY_AND_ASSIGN (tui_win_info);
  47
  48   /* This is called after the window is resized, and should update the
  49      window's contents.  */
  50   virtual void rerender ();
  51
  52   virtual void make_window ();
  53
  54 public:
  55   tui_win_info (tui_win_info &&) = default;
  56   virtual ~tui_win_info () = default;
  57
  58   /* Call to refresh this window.  */
  59   virtual void refresh_window ();
  60
  61   /* Make this window visible or invisible.  */
  62   virtual void make_visible (bool visible);
  63
  64   /* Return the name of this type of window.  */
  65   virtual const char *name () const = 0;
  66
  67   /* Compute the maximum height of this window.  */
  68   virtual int max_height () const;
  69
  70   /* Compute the minimum height of this window.  */
  71   virtual int min_height () const
  72   {
  73     return MIN_WIN_HEIGHT;
  74   }
  75
  76   /* Compute the maximum width of this window.  */
  77   int max_width () const;
  78
  79   /* Compute the minimum width of this window.  */
  80   int min_width () const
  81   {
  82     return 3;
  83   }
  84
  85   /* Return true if this window can be boxed.  */
  86   virtual bool can_box () const
  87   {
  88     return true;
  89   }
  90
  91   /* Resize this window.  The parameters are used to set the window's
  92      size and position.  */
  93   virtual void resize (int height, int width,
  94                        int origin_x, int origin_y);
  95
  96   /* Return true if this window is visible.  */
  97   bool is_visible () const
  98   {
  99     return handle != nullptr && tui_active;
 100   }
 101
 102   /* Return true if this window can accept the focus.  */
 103   virtual bool can_focus () const
 104   {
 105     return true;
 106   }
 107
 108   /* Disable output until the next call to doupdate.  */
 109   void no_refresh ()
 110   {
 111     if (handle != nullptr)
 112       wnoutrefresh (handle.get ());
 113   }
 114
 115   /* Called after the tab width has been changed.  */
 116   virtual void update_tab_width ()
 117   {
 118   }
 119
 120   /* Set whether this window is highlighted.  */
 121   void set_highlight (bool highlight)
 122   {
 123     is_highlighted = highlight;
 124   }
 125
 126   /* Methods to scroll the contents of this window.  Note that they
 127      are named with "_scroll" coming at the end because the more
 128      obvious "scroll_forward" is defined as a macro in term.h.  */
 129   void forward_scroll (int num_to_scroll);
 130   void backward_scroll (int num_to_scroll);
 131   void left_scroll (int num_to_scroll);
 132   void right_scroll (int num_to_scroll);
 133
 134   /* Return true if this window can be scrolled, false otherwise.  */
 135   virtual bool can_scroll () const
 136   {
 137     return true;
 138   }
 139
 140   void check_and_display_highlight_if_needed ();
 141
 142   /* Window handle.  */
 143   std::unique_ptr<WINDOW, curses_deleter> handle;
 144   /* Window width.  */
 145   int width = 0;
 146   /* Window height.  */
 147   int height = 0;
 148   /* Origin of window.  */
 149   int x = 0;
 150   int y = 0;
 151
 152   /* Window title to display.  */
 153   std::string title;
 154
 155   /* Is this window highlighted?  */
 156   bool is_highlighted = false;
 157
 158 protected:
 159
 160   /* Scroll the contents vertically.  This is only called via
 161      forward_scroll and backward_scroll.  */
 162   virtual void do_scroll_vertical (int num_to_scroll) = 0;
 163
 164   /* Scroll the contents horizontally.  This is only called via
 165      left_scroll and right_scroll.  */
 166   virtual void do_scroll_horizontal (int num_to_scroll) = 0;
 167 };
 168
 169 /* Constant definitions.  */
 170 #define SRC_NAME                "src"
 171 #define CMD_NAME                "cmd"
 172 #define DATA_NAME               "regs"
 173 #define DISASSEM_NAME           "asm"
 174 #define STATUS_NAME             "status"
 175
 176 /* Global Data.  */
 177 extern struct tui_win_info *tui_win_list[MAX_MAJOR_WINDOWS];
 178
 179 #define TUI_SRC_WIN     ((tui_source_window *) tui_win_list[SRC_WIN])
 180 #define TUI_DISASM_WIN  ((tui_disasm_window *) tui_win_list[DISASSEM_WIN])
 181 #define TUI_DATA_WIN    ((tui_data_window *) tui_win_list[DATA_WIN])
 182 #define TUI_CMD_WIN     ((tui_cmd_window *) tui_win_list[CMD_WIN])
 183 #define TUI_STATUS_WIN  ((tui_locator_window *) tui_win_list[STATUS_WIN])
 184
 185 /* All the windows that are currently instantiated, in layout
 186    order.  */
 187 extern std::vector<tui_win_info *> tui_windows;
 188
 189 /* Return a range adapter for iterating over TUI windows.  */
 190 static inline std::vector<tui_win_info *> &
 191 all_tui_windows ()
 192 {
 193   return tui_windows;
 194 }
 195
 196 /* Data Manipulation Functions.  */
 197 extern int tui_term_height (void);
 198 extern void tui_set_term_height_to (int);
 199 extern int tui_term_width (void);
 200 extern void tui_set_term_width_to (int);
 201 extern struct tui_win_info *tui_win_with_focus (void);
 202 extern bool tui_win_resized ();
 203 extern void tui_set_win_resized_to (bool);
 204
 205 extern struct tui_win_info *tui_next_win (struct tui_win_info *);
 206 extern struct tui_win_info *tui_prev_win (struct tui_win_info *);
 207
 208 extern unsigned int tui_tab_width;
 209
 210 #endif /* TUI_TUI_DATA_H */