text: #ifndef NVIM_WINDOW_H
  #define NVIM_WINDOW_H
  
  #include <stdbool.h>
  
  #include "nvim/buffer_defs.h"
  #include "nvim/mark.h"
  #include "nvim/os/os.h"
  
  // Values for file_name_in_line()
  #define FNAME_MESS      1       // give error message
  #define FNAME_EXP       2       // expand to path
  #define FNAME_HYP       4       // check for hypertext link
  #define FNAME_INCL      8       // apply 'includeexpr'
  #define FNAME_REL       16      // ".." and "./" are relative to the (current)
                                  // file instead of the current directory
  #define FNAME_UNESC     32      // remove backslashes used for escaping
  
  // arguments for win_split()
  #define WSP_ROOM        1       // require enough room
  #define WSP_VERT        2       // split vertically
  #define WSP_TOP         4       // window at top-left of shell
  #define WSP_BOT         8       // window at bottom-right of shell
  #define WSP_HELP        16      // creating the help window
  #define WSP_BELOW       32      // put new window below/right
  #define WSP_ABOVE       64      // put new window above/left
  #define WSP_NEWLOC      128     // don't copy location list
  
  // Minimum screen size
  #define MIN_COLUMNS     12      // minimal columns for screen
  #define MIN_LINES       2       // minimal lines for screen
  
  /// Structure used by switch_win() to pass values to restore_win()
  typedef struct {
    win_T *sw_curwin;
    tabpage_T *sw_curtab;
    bool sw_same_win;  ///< VIsual_active was not reset
    bool sw_visual_active;
  } switchwin_T;
  
  /// Execute a block of code in the context of window `wp` in tabpage `tp`.
  /// Ensures the status line is redrawn and cursor position is valid if it is moved.
  #define WIN_EXECUTE(wp, tp, block) \
    do { \
      win_T *const wp_ = (wp); \
      const pos_T curpos_ = wp_->w_cursor; \
      char_u cwd_[MAXPATHL]; \
      char_u autocwd_[MAXPATHL]; \
      bool apply_acd_ = false; \
      int cwd_status_ = FAIL; \
      /* Getting and setting directory can be slow on some systems, only do */ \
      /* this when the current or target window/tab have a local directory or */ \
      /* 'acd' is set. */ \
      if (curwin != wp \
          && (curwin->w_localdir != NULL || wp->w_localdir != NULL \
              || (curtab != tp && (curtab->tp_localdir != NULL || tp->tp_localdir != NULL)) \
              || p_acd)) { \
        cwd_status_ = os_dirname(cwd_, MAXPATHL); \
      } \
      /* If 'acd' is set, check we are using that directory.  If yes, then */ \
      /* apply 'acd' afterwards, otherwise restore the current directory. */ \
      if (cwd_status_ == OK && p_acd) { \
        do_autochdir(); \
        apply_acd_ = os_dirname(autocwd_, MAXPATHL) == OK && STRCMP(cwd_, autocwd_) == 0; \
      } \
      switchwin_T switchwin_; \
      if (switch_win_noblock(&switchwin_, wp_, (tp), true) == OK) { \
        check_cursor(); \
        block; \
      } \
      restore_win_noblock(&switchwin_, true); \
      if (apply_acd_) { \
        do_autochdir(); \
      } else if (cwd_status_ == OK) { \
        os_chdir((char *)cwd_); \
      } \
      /* Update the status line if the cursor moved. */ \
      if (win_valid(wp_) && !equalpos(curpos_, wp_->w_cursor)) { \
        wp_->w_redr_status = true; \
      } \
      /* In case the command moved the cursor or changed the Visual area, */ \
      /* check it is valid. */ \
      check_cursor(); \
      if (VIsual_active) { \
        check_pos(curbuf, &VIsual); \
      } \
    } while (false)
  
  #ifdef INCLUDE_GENERATED_DECLARATIONS
  # include "window.h.generated.h"
  #endif
  #endif  // NVIM_WINDOW_H
  