Allow 'browse-url-emacs' to fetch URL in the selected window

[emacs.git] / src / frame.h

/* Define frame-object for GNU Emacs.
   Copyright (C) 1993-1994, 1999-2018 Free Software Foundation, Inc.

This file is part of GNU Emacs.

GNU Emacs is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or (at
your option) any later version.

GNU Emacs is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with GNU Emacs.  If not, see <https://www.gnu.org/licenses/>.  */

#ifndef EMACS_FRAME_H
#define EMACS_FRAME_H

#include "termhooks.h"
#include "window.h"

INLINE_HEADER_BEGIN

enum vertical_scroll_bar_type
{
  vertical_scroll_bar_none,
  vertical_scroll_bar_left,
  vertical_scroll_bar_right
};

#ifdef HAVE_WINDOW_SYSTEM

enum fullscreen_type
{
  FULLSCREEN_NONE,
  FULLSCREEN_WIDTH     = 0x1,
  FULLSCREEN_HEIGHT    = 0x2,
  FULLSCREEN_BOTH      = 0x3, /* Not a typo but means "width and height".  */
  FULLSCREEN_MAXIMIZED = 0x4,
#ifdef HAVE_NTGUI
  FULLSCREEN_WAIT      = 0x8
#endif
};

enum z_group
{
  z_group_none,
  z_group_above,
  z_group_below,
  z_group_above_suspended,
};

enum internal_border_part
  {
   INTERNAL_BORDER_NONE,
   INTERNAL_BORDER_LEFT_EDGE,
   INTERNAL_BORDER_TOP_LEFT_CORNER,
   INTERNAL_BORDER_TOP_EDGE,
   INTERNAL_BORDER_TOP_RIGHT_CORNER,
   INTERNAL_BORDER_RIGHT_EDGE,
   INTERNAL_BORDER_BOTTOM_RIGHT_CORNER,
   INTERNAL_BORDER_BOTTOM_EDGE,
   INTERNAL_BORDER_BOTTOM_LEFT_CORNER,
  };

#ifdef NS_IMPL_COCOA
enum ns_appearance_type
  {
   ns_appearance_aqua,
   ns_appearance_vibrant_dark
  };
#endif
#endif /* HAVE_WINDOW_SYSTEM */

/* The structure representing a frame.  */

struct frame
{
  union vectorlike_header header;

  /* All Lisp_Object components must come first.
     That ensures they are all aligned normally.  */

  /* Name of this frame: a Lisp string.  It is used for looking up resources,
     as well as for the title in some cases.  */
  Lisp_Object name;

  /* The name to use for the icon, the last time
     it was refreshed.  nil means not explicitly specified.  */
  Lisp_Object icon_name;

  /* This is the frame title specified explicitly, if any.
     Usually it is nil.  */
  Lisp_Object title;

#if defined (HAVE_WINDOW_SYSTEM)
  /* This frame's parent frame, if it has one.  */
  Lisp_Object parent_frame;
#endif /* HAVE_WINDOW_SYSTEM */

  /* The frame which should receive keystrokes that occur in this
     frame, or nil if they should go to the frame itself.  This is
     usually nil, but if the frame is minibufferless, we can use this
     to redirect keystrokes to a surrogate minibuffer frame when
     needed.

     Note that a value of nil is different than having the field point
     to the frame itself.  Whenever the Fselect_frame function is used
     to shift from one frame to the other, any redirections to the
     original frame are shifted to the newly selected frame; if
     focus_frame is nil, Fselect_frame will leave it alone.  */
  Lisp_Object focus_frame;

  /* This frame's root window.  Every frame has one.
     If the frame has only a minibuffer window, this is it.
     Otherwise, if the frame has a minibuffer window, this is its sibling.  */
  Lisp_Object root_window;

  /* This frame's selected window.
     Each frame has its own window hierarchy
     and one of the windows in it is selected within the frame.
     The selected window of the selected frame is Emacs's selected window.  */
  Lisp_Object selected_window;

  /* This frame's minibuffer window.
     Most frames have their own minibuffer windows,
     but only the selected frame's minibuffer window
     can actually appear to exist.  */
  Lisp_Object minibuffer_window;

  /* Parameter alist of this frame.
     These are the parameters specified when creating the frame
     or modified with modify-frame-parameters.  */
  Lisp_Object param_alist;

  /* List of scroll bars on this frame.
     Actually, we don't specify exactly what is stored here at all; the
     scroll bar implementation code can use it to store anything it likes.
     This field is marked by the garbage collector.  It is here
     instead of in the `device' structure so that the garbage
     collector doesn't need to look inside the window-system-dependent
     structure.  */
  Lisp_Object scroll_bars;
  Lisp_Object condemned_scroll_bars;

  /* Vector describing the items to display in the menu bar.
     Each item has four elements in this vector.
     They are KEY, STRING, SUBMAP, and HPOS.
     (HPOS is not used in when the X toolkit is in use.)
     There are four additional elements of nil at the end, to terminate.  */
  Lisp_Object menu_bar_items;

  /* Alist of elements (FACE-NAME . FACE-VECTOR-DATA).  */
  Lisp_Object face_alist;

  /* A vector that records the entire structure of this frame's menu bar.
     For the format of the data, see extensive comments in xmenu.c.
     Only the X toolkit version uses this.  */
  Lisp_Object menu_bar_vector;

  /* Predicate for selecting buffers for other-buffer.  */
  Lisp_Object buffer_predicate;

  /* List of buffers viewed in this frame, for other-buffer.  */
  Lisp_Object buffer_list;

  /* List of buffers that were viewed, then buried in this frame.  The
     most recently buried buffer is first.  For last-buffer.  */
  Lisp_Object buried_buffer_list;

#if defined (HAVE_X_WINDOWS) && ! defined (USE_X_TOOLKIT) && ! defined (USE_GTK)
  /* A dummy window used to display menu bars under X when no X
     toolkit support is available.  */
  Lisp_Object menu_bar_window;
#endif

#if defined (HAVE_WINDOW_SYSTEM) && ! defined (USE_GTK) && ! defined (HAVE_NS)
  /* A window used to display the tool-bar of a frame.  */
  Lisp_Object tool_bar_window;

  /* Desired and current contents displayed in that window.  */
  Lisp_Object desired_tool_bar_string;
  Lisp_Object current_tool_bar_string;
#endif

  /* Desired and current tool-bar items.  */
  Lisp_Object tool_bar_items;

#ifdef USE_GTK
  /* Where tool bar is, can be left, right, top or bottom.
     Except with GTK, the only supported position is `top'.  */
  Lisp_Object tool_bar_position;
#endif

#if defined (HAVE_XFT) || defined (HAVE_FREETYPE)
  /* List of data specific to font-driver and frame, but common to faces.  */
  Lisp_Object font_data;
#endif

  /* Beyond here, there should be no more Lisp_Object components.  */

  /* Cache of realized faces.  */
  struct face_cache *face_cache;

#if defined (HAVE_WINDOW_SYSTEM) && ! defined (USE_GTK) && ! defined (HAVE_NS)
  /* Tool-bar item index of the item on which a mouse button was pressed.  */
  int last_tool_bar_item;
#endif

  /* Number of elements in `menu_bar_vector' that have meaningful data.  */
  int menu_bar_items_used;

#if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI)
  /* A buffer to hold the frame's name.  Since this is used by the
     window system toolkit, we can't use the Lisp string's pointer
     (`name', above) because it might get relocated.  */
  char *namebuf;
#endif

#ifdef USE_X_TOOLKIT
  /* Used to pass geometry parameters to toolkit functions.  */
  char *shell_position;
#endif

  /* Glyph pool and matrix.  */
  struct glyph_pool *current_pool;
  struct glyph_pool *desired_pool;
  struct glyph_matrix *desired_matrix;
  struct glyph_matrix *current_matrix;

  /* Bitfield area begins here.  Keep them together to avoid extra padding.  */

  /* True means that glyphs on this frame have been initialized so it can
     be used for output.  */
  bool_bf glyphs_initialized_p : 1;

  /* Set to true in change_frame_size when size of frame changed
     Clear the frame in clear_garbaged_frames if set.  */
  bool_bf resized_p : 1;

  /* Set to true if the default face for the frame has been
     realized.  Reset to zero whenever the default face changes.
     Used to see the difference between a font change and face change.  */
  bool_bf default_face_done_p : 1;

  /* Set to true if this frame has already been hscrolled during
     current redisplay.  */
  bool_bf already_hscrolled_p : 1;

  /* Set to true when current redisplay has updated frame.  */
  bool_bf updated_p : 1;

#if defined (HAVE_WINDOW_SYSTEM) && ! defined (USE_GTK) && ! defined (HAVE_NS)
  /* Set to true to minimize tool-bar height even when
     auto-resize-tool-bar is set to grow-only.  */
  bool_bf minimize_tool_bar_window_p : 1;
#endif

#if defined (USE_GTK) || defined (HAVE_NS)
  /* True means using a tool bar that comes from the toolkit.  */
  bool_bf external_tool_bar : 1;
#endif

  /* True means that fonts have been loaded since the last glyph
     matrix adjustments.  */
  bool_bf fonts_changed : 1;

  /* True means that cursor type has been changed.  */
  bool_bf cursor_type_changed : 1;

  /* True if it needs to be redisplayed.  */
  bool_bf redisplay : 1;

#if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI)     \
    || defined (HAVE_NS) || defined (USE_GTK)
  /* True means using a menu bar that comes from the X toolkit.  */
  bool_bf external_menu_bar : 1;
#endif

  /* Next two bitfields are mutually exclusive.  They might both be
     zero if the frame has been made invisible without an icon.  */

  /* Nonzero if the frame is currently displayed; we check
     it to see if we should bother updating the frame's contents.

     On ttys and on Windows NT/9X, to avoid wasting effort updating
     visible frames that are actually completely obscured by other
     windows on the display, we bend the meaning of visible slightly:
     if equal to 2, then the frame is obscured - we still consider
     it to be "visible" as seen from lisp, but we don't bother
     updating it.  */
  unsigned visible : 2;

  /* True if the frame is currently iconified.  Do not
     set this directly, use SET_FRAME_ICONIFIED instead.  */
  bool_bf iconified : 1;

  /* True if this frame should be fully redisplayed.  Disables all
     optimizations while rebuilding matrices and redrawing.  */
  bool_bf garbaged : 1;

  /* False means, if this frame has just one window,
     show no modeline for that window.  */
  bool_bf wants_modeline : 1;

  /* True means raise this frame to the top of the heap when selected.  */
  bool_bf auto_raise : 1;

  /* True means lower this frame to the bottom of the stack when left.  */
  bool_bf auto_lower : 1;

  /* True if frame's root window can't be split.  */
  bool_bf no_split : 1;

  /* If this is set, then Emacs won't change the frame name to indicate
     the current buffer, etcetera.  If the user explicitly sets the frame
     name, this gets set.  If the user sets the name to Qnil, this is
     cleared.  */
  bool_bf explicit_name : 1;

  /* True if configuration of windows on this frame has changed since
     last call of run_window_size_change_functions.  */
  bool_bf window_configuration_changed : 1;

  /* True if the mouse has moved on this display device
     since the last time we checked.  */
  bool_bf mouse_moved : 1;

  /* True means that the pointer is invisible.  */
  bool_bf pointer_invisible : 1;

  /* True means that all windows except mini-window and
     selected window on this frame have frozen window starts.  */
  bool_bf frozen_window_starts : 1;

  /* The output method says how the contents of this frame are
     displayed.  It could be using termcap, or using an X window.
     This must be the same as the terminal->type. */
  ENUM_BF (output_method) output_method : 3;

#ifdef HAVE_WINDOW_SYSTEM
  /* True if this frame is a tooltip frame.  */
  bool_bf tooltip : 1;

  /* See FULLSCREEN_ enum on top.  */
  ENUM_BF (fullscreen_type) want_fullscreen : 4;

  /* If not vertical_scroll_bar_none, we should actually
     display the scroll bars of this type on this frame.  */
  ENUM_BF (vertical_scroll_bar_type) vertical_scroll_bar_type : 2;

  /* Nonzero if we should actually display horizontal scroll bars on this frame.  */
  bool_bf horizontal_scroll_bars : 1;

  /* True if this is an undecorated frame.  */
  bool_bf undecorated : 1;

#ifndef HAVE_NTGUI
  /* True if this is an override_redirect frame.  */
  bool_bf override_redirect : 1;
#endif

  /* Nonzero if this frame's icon should not appear on its display's taskbar.  */
  bool_bf skip_taskbar : 1;

  /* Nonzero if this frame's window F's X window does not want to
     receive input focus when it is mapped.  */
  bool_bf no_focus_on_map : 1;

  /* Nonzero if this frame's window does not want to receive input focus
     via mouse clicks or by moving the mouse into it.  */
  bool_bf no_accept_focus : 1;

  /* The z-group this frame's window belongs to. */
  ENUM_BF (z_group) z_group : 2;

  /* Non-zero if display of truncation and continuation glyphs outside
     the fringes is suppressed.  */
  bool_bf no_special_glyphs : 1;
#endif /* HAVE_WINDOW_SYSTEM */

  /* Whether new_height and new_width shall be interpreted
     in pixels.  */
  bool_bf new_pixelwise : 1;

  /* True means x_set_window_size requests can be processed for this
     frame.  */
  bool_bf can_x_set_window_size : 1;

  /* Set to true after this frame was made by `make-frame'.  */
  bool_bf after_make_frame : 1;

  /* Whether the tool bar height change should be taken into account.  */
  bool_bf tool_bar_redisplayed : 1;
  bool_bf tool_bar_resized : 1;

  /* Inhibit implied resize before after_make_frame is set.  */
  bool_bf inhibit_horizontal_resize : 1;
  bool_bf inhibit_vertical_resize : 1;

  /* Non-zero if this frame's faces need to be recomputed.  */
  bool_bf face_change : 1;

  /* Bitfield area ends here.  */

  /* Number of lines (rounded up) of tool bar.  REMOVE THIS  */
  int tool_bar_lines;

  /* Height of frame internal tool bar in pixels.  */
  int tool_bar_height;

  int n_tool_bar_rows;
  int n_tool_bar_items;

  /* A buffer for decode_mode_line.  */
  char *decode_mode_spec_buffer;

  /* See do_line_insertion_deletion_costs for info on these arrays.  */
  /* Cost of inserting 1 line on this frame.  */
  int *insert_line_cost;
  /* Cost of deleting 1 line on this frame.  */
  int *delete_line_cost;
  /* Cost of inserting n lines on this frame.  */
  int *insert_n_lines_cost;
  /* Cost of deleting n lines on this frame.  */
  int *delete_n_lines_cost;

  /* Text width of this frame (excluding fringes, vertical scroll bar
     and internal border widths) and text height (excluding menu bar,
     tool bar, horizontal scroll bar and internal border widths) in
     units of canonical characters.  */
  int text_cols, text_lines;

  /* Total width of this frame (including fringes, vertical scroll bar
     and internal border widths) and total height (including menu bar,
     tool bar, horizontal scroll bar and internal border widths) in
     units of canonical characters.  */
  int total_cols, total_lines;

  /* Text width of this frame (excluding fringes, vertical scroll bar
     and internal border widths) and text height (excluding menu bar,
     tool bar, horizontal scroll bar and internal border widths) in
     pixels.  */
  int text_width, text_height;

  /* New text height and width for pending size change.  0 if no change
     pending.  These values represent pixels or canonical character units
     according to the value of new_pixelwise and correlate to the
     text width/height of the frame.  */
  int new_width, new_height;

  /* Pixel position of the frame window (x and y offsets in root window).  */
  int left_pos, top_pos;

  /* Total width of this frame (including fringes, vertical scroll bar
     and internal border widths) and total height (including internal
     menu and tool bars, horizontal scroll bar and internal border
     widths) in pixels.  */
  int pixel_width, pixel_height;

  /* This is the gravity value for the specified window position.  */
  int win_gravity;

  /* The geometry flags for this window.  */
  int size_hint_flags;

  /* Border width of the frame window as known by the (X) window system.  */
  int border_width;

  /* Width of the internal border.  This is a line of background color
     just inside the window's border.  When the frame is selected,
     a highlighting is displayed inside the internal border.  */
  int internal_border_width;

  /* Widths of dividers between this frame's windows in pixels.  */
  int right_divider_width, bottom_divider_width;

  /* Widths of fringes in pixels.  */
  int left_fringe_width, right_fringe_width;

  /* Total width of fringes reserved for drawing truncation bitmaps,
     continuation bitmaps and alike - REMOVE THIS !!!!.    */
  int fringe_cols;

  /* Number of lines of menu bar.  */
  int menu_bar_lines;

  /* Pixel height of menubar.  */
  int menu_bar_height;

  /* Canonical X unit.  Width of default font, in pixels.  */
  int column_width;

  /* Canonical Y unit.  Height of a line, in pixels.  */
  int line_height;

  /* The terminal device that this frame uses.  If this is NULL, then
     the frame has been deleted.  */
  struct terminal *terminal;

  /* Device-dependent, frame-local auxiliary data used for displaying
     the contents.  When the frame is deleted, this data is deleted as
     well.  */
  union output_data
  {
    struct tty_output *tty;     /* From termchar.h.  */
    struct x_output *x;         /* From xterm.h.  */
    struct w32_output *w32;     /* From w32term.h.  */
    struct ns_output *ns;       /* From nsterm.h.  */
    intptr_t nothing;
  }
  output_data;

  /* List of font-drivers available on the frame.  */
  struct font_driver_list *font_driver_list;

#if defined (HAVE_X_WINDOWS)
  /* Used by x_wait_for_event when watching for an X event on this frame.  */
  int wait_event_type;
#endif

  /* What kind of text cursor should we draw in the future?
     This should always be filled_box_cursor or bar_cursor.  */
  enum text_cursor_kinds desired_cursor;

  /* Width of bar cursor (if we are using that).  */
  int cursor_width;

  /* What kind of text cursor should we draw when the cursor blinks off?
     This can be filled_box_cursor or bar_cursor or no_cursor.  */
  enum text_cursor_kinds blink_off_cursor;

  /* Width of bar cursor (if we are using that) for blink-off state.  */
  int blink_off_cursor_width;

  /* Configured width of the scroll bar, in pixels and in characters.
     config_scroll_bar_cols tracks config_scroll_bar_width if the
     latter is positive; a zero value in config_scroll_bar_width means
     to compute the actual width on the fly, using config_scroll_bar_cols
     and the current font width.  */
  int config_scroll_bar_width;
  int config_scroll_bar_cols;

  /* Configured height of the scroll bar, in pixels and in characters.
     config_scroll_bar_lines tracks config_scroll_bar_height if the
     latter is positive; a zero value in config_scroll_bar_height means
     to compute the actual width on the fly, using
     config_scroll_bar_lines and the current font width.  */
  int config_scroll_bar_height;
  int config_scroll_bar_lines;

  /* The baud rate that was used to calculate costs for this frame.  */
  int cost_calculation_baud_rate;

  /* Frame opacity
     alpha[0]: alpha transparency of the active frame
     alpha[1]: alpha transparency of inactive frames
     Negative values mean not to change alpha.  */
  double alpha[2];

  /* Exponent for gamma correction of colors.  1/(VIEWING_GAMMA *
     SCREEN_GAMMA) where viewing_gamma is 0.4545 and SCREEN_GAMMA is a
     frame parameter.  0 means don't do gamma correction.  */
  double gamma;

  /* Additional space to put between text lines on this frame.  */
  int extra_line_spacing;

  /* All display backends seem to need these two pixel values.  */
  unsigned long background_pixel;
  unsigned long foreground_pixel;

#ifdef NS_IMPL_COCOA
  /* NSAppearance theme used on this frame.  */
  enum ns_appearance_type ns_appearance;
  bool_bf ns_transparent_titlebar;
#endif
};

/* Most code should use these functions to set Lisp fields in struct frame.  */

INLINE void
fset_buffer_list (struct frame *f, Lisp_Object val)
{
  f->buffer_list = val;
}
INLINE void
fset_buried_buffer_list (struct frame *f, Lisp_Object val)
{
  f->buried_buffer_list = val;
}
INLINE void
fset_condemned_scroll_bars (struct frame *f, Lisp_Object val)
{
  f->condemned_scroll_bars = val;
}
INLINE void
fset_face_alist (struct frame *f, Lisp_Object val)
{
  f->face_alist = val;
}
#if defined (HAVE_WINDOW_SYSTEM)
INLINE void
fset_parent_frame (struct frame *f, Lisp_Object val)
{
  f->parent_frame = val;
}
#endif
INLINE void
fset_focus_frame (struct frame *f, Lisp_Object val)
{
  f->focus_frame = val;
}
INLINE void
fset_icon_name (struct frame *f, Lisp_Object val)
{
  f->icon_name = val;
}
INLINE void
fset_menu_bar_items (struct frame *f, Lisp_Object val)
{
  f->menu_bar_items = val;
}
INLINE void
fset_menu_bar_vector (struct frame *f, Lisp_Object val)
{
  f->menu_bar_vector = val;
}
#if defined (HAVE_X_WINDOWS) && ! defined (USE_X_TOOLKIT) && ! defined (USE_GTK)
INLINE void
fset_menu_bar_window (struct frame *f, Lisp_Object val)
{
  f->menu_bar_window = val;
}
#endif
INLINE void
fset_name (struct frame *f, Lisp_Object val)
{
  f->name = val;
}
INLINE void
fset_param_alist (struct frame *f, Lisp_Object val)
{
  f->param_alist = val;
}
INLINE void
fset_root_window (struct frame *f, Lisp_Object val)
{
  f->root_window = val;
}
INLINE void
fset_scroll_bars (struct frame *f, Lisp_Object val)
{
  f->scroll_bars = val;
}
INLINE void
fset_selected_window (struct frame *f, Lisp_Object val)
{
  f->selected_window = val;
}
INLINE void
fset_title (struct frame *f, Lisp_Object val)
{
  f->title = val;
}
INLINE void
fset_tool_bar_items (struct frame *f, Lisp_Object val)
{
  f->tool_bar_items = val;
}
#ifdef USE_GTK
INLINE void
fset_tool_bar_position (struct frame *f, Lisp_Object val)
{
  f->tool_bar_position = val;
}
#endif /* USE_GTK */
#if defined (HAVE_WINDOW_SYSTEM) && ! defined (USE_GTK) && ! defined (HAVE_NS)
INLINE void
fset_tool_bar_window (struct frame *f, Lisp_Object val)
{
  f->tool_bar_window = val;
}
INLINE void
fset_current_tool_bar_string (struct frame *f, Lisp_Object val)
{
  f->current_tool_bar_string = val;
}
INLINE void
fset_desired_tool_bar_string (struct frame *f, Lisp_Object val)
{
  f->desired_tool_bar_string = val;
}
#endif /* HAVE_WINDOW_SYSTEM && !USE_GTK && !HAVE_NS */

INLINE double
NUMVAL (Lisp_Object x)
{
  return NUMBERP (x) ? XFLOATINT (x) : -1;
}

INLINE double
default_pixels_per_inch_x (void)
{
  Lisp_Object v = (CONSP (Vdisplay_pixels_per_inch)
                   ? XCAR (Vdisplay_pixels_per_inch)
                   : Vdisplay_pixels_per_inch);
  return NUMVAL (v) > 0 ? NUMVAL (v) : 72.0;
}

INLINE double
default_pixels_per_inch_y (void)
{
  Lisp_Object v = (CONSP (Vdisplay_pixels_per_inch)
                   ? XCDR (Vdisplay_pixels_per_inch)
                   : Vdisplay_pixels_per_inch);
  return NUMVAL (v) > 0 ? NUMVAL (v) : 72.0;
}

#define FRAME_KBOARD(f) ((f)->terminal->kboard)

/* Return a pointer to the image cache of frame F.  */
#define FRAME_IMAGE_CACHE(F) ((F)->terminal->image_cache)

#define XFRAME(p) \
  (eassert (FRAMEP (p)), (struct frame *) XUNTAG (p, Lisp_Vectorlike))
#define XSETFRAME(a, b) (XSETPSEUDOVECTOR (a, b, PVEC_FRAME))

/* Given a window, return its frame as a Lisp_Object.  */
#define WINDOW_FRAME(w) ((w)->frame)

/* Test a frame for particular kinds of display methods.  */
#define FRAME_INITIAL_P(f) ((f)->output_method == output_initial)
#define FRAME_TERMCAP_P(f) ((f)->output_method == output_termcap)
#define FRAME_X_P(f) ((f)->output_method == output_x_window)
#ifndef HAVE_NTGUI
#define FRAME_W32_P(f) false
#else
#define FRAME_W32_P(f) ((f)->output_method == output_w32)
#endif
#ifndef MSDOS
#define FRAME_MSDOS_P(f) false
#else
#define FRAME_MSDOS_P(f) ((f)->output_method == output_msdos_raw)
#endif
#ifndef HAVE_NS
#define FRAME_NS_P(f) false
#else
#define FRAME_NS_P(f) ((f)->output_method == output_ns)
#endif

/* FRAME_WINDOW_P tests whether the frame is a window, and is
   defined to be the predicate for the window system being used.  */

#ifdef HAVE_X_WINDOWS
#define FRAME_WINDOW_P(f) FRAME_X_P (f)
#endif
#ifdef HAVE_NTGUI
#define FRAME_WINDOW_P(f) FRAME_W32_P (f)
#endif
#ifdef HAVE_NS
#define FRAME_WINDOW_P(f) FRAME_NS_P(f)
#endif
#ifndef FRAME_WINDOW_P
#define FRAME_WINDOW_P(f) ((void) (f), false)
#endif

/* Dots per inch of the screen the frame F is on.  */

#ifdef HAVE_WINDOW_SYSTEM

#define FRAME_RES_X(f)                                          \
  (eassert (FRAME_WINDOW_P (f)), FRAME_DISPLAY_INFO (f)->resx)
#define FRAME_RES_Y(f)                                          \
  (eassert (FRAME_WINDOW_P (f)), FRAME_DISPLAY_INFO (f)->resy)

#else /* !HAVE_WINDOW_SYSTEM */

/* Defaults when no window system available.  */

#define FRAME_RES_X(f) default_pixels_per_inch_x ()
#define FRAME_RES_Y(f) default_pixels_per_inch_y ()

#endif /* HAVE_WINDOW_SYSTEM */

/* Return a pointer to the structure holding information about the
   region of text, if any, that is currently shown in mouse-face on
   frame F.  We need to define two versions because a TTY-only build
   does not have FRAME_DISPLAY_INFO.  */
#ifdef HAVE_WINDOW_SYSTEM
# define MOUSE_HL_INFO(F)                                       \
  (FRAME_WINDOW_P(F)                                            \
   ? &FRAME_DISPLAY_INFO(F)->mouse_highlight                    \
   : &(F)->output_data.tty->display_info->mouse_highlight)
#else
# define MOUSE_HL_INFO(F)                                       \
  (&(F)->output_data.tty->display_info->mouse_highlight)
#endif

/* True if frame F is still alive (not deleted).  */
#define FRAME_LIVE_P(f) ((f)->terminal != 0)

/* True if frame F is a minibuffer-only frame.  */
#define FRAME_MINIBUF_ONLY_P(f) \
  EQ (FRAME_ROOT_WINDOW (f), FRAME_MINIBUF_WINDOW (f))

/* True if frame F contains it's own minibuffer window.  Frame always has
   minibuffer window, but it could use minibuffer window of another frame.  */
#define FRAME_HAS_MINIBUF_P(f)                                  \
  (WINDOWP (f->minibuffer_window)                               \
   && XFRAME (XWINDOW (f->minibuffer_window)->frame) == f)

/* Pixel width of frame F.  */
#define FRAME_PIXEL_WIDTH(f) ((f)->pixel_width)

/* Pixel height of frame F.  */
#define FRAME_PIXEL_HEIGHT(f) ((f)->pixel_height)

/* Width of frame F, measured in canonical character columns,
   not including scroll bars if any.  */
#define FRAME_COLS(f) (f)->text_cols

/* Height of frame F, measured in canonical lines, including
   non-toolkit menu bar and non-toolkit tool bar lines.  */
#define FRAME_LINES(f) (f)->text_lines

/* Width of frame F, measured in pixels not including the width for
   fringes, scroll bar, and internal borders.  */
#define FRAME_TEXT_WIDTH(f) (f)->text_width

/* Height of frame F, measured in pixels not including the height
   for scroll bar and internal borders.  */
#define FRAME_TEXT_HEIGHT(f) (f)->text_height

/* Number of lines of frame F used for menu bar.
   This is relevant on terminal frames and on
   X Windows when not using the X toolkit.
   These lines are counted in FRAME_LINES.  */
#define FRAME_MENU_BAR_LINES(f) (f)->menu_bar_lines

/* Pixel height of frame F's menu bar.  */
#define FRAME_MENU_BAR_HEIGHT(f) (f)->menu_bar_height

/* True if this frame should display a tool bar
   in a way that does not use any text lines.  */
#if defined (USE_GTK) || defined (HAVE_NS)
#define FRAME_EXTERNAL_TOOL_BAR(f) (f)->external_tool_bar
#else
#define FRAME_EXTERNAL_TOOL_BAR(f) false
#endif

/* This is really supported only with GTK.  */
#ifdef USE_GTK
#define FRAME_TOOL_BAR_POSITION(f) (f)->tool_bar_position
#else
#define FRAME_TOOL_BAR_POSITION(f) ((void) (f), Qtop)
#endif

/* Number of lines of frame F used for the tool-bar.  */
#define FRAME_TOOL_BAR_LINES(f) (f)->tool_bar_lines

/* Pixel height of frame F's tool-bar.  */
#define FRAME_TOOL_BAR_HEIGHT(f) (f)->tool_bar_height

/* Lines above the top-most window in frame F.  */
#define FRAME_TOP_MARGIN(F) \
  (FRAME_MENU_BAR_LINES (F) + FRAME_TOOL_BAR_LINES (F))

/* Pixel height of frame F's top margin.  */
#define FRAME_TOP_MARGIN_HEIGHT(F)                              \
  (FRAME_MENU_BAR_HEIGHT (F) + FRAME_TOOL_BAR_HEIGHT (F))

/* True if this frame should display a menu bar
   in a way that does not use any text lines.  */
#if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI) \
     || defined (HAVE_NS) || defined (USE_GTK)
#define FRAME_EXTERNAL_MENU_BAR(f) (f)->external_menu_bar
#else
#define FRAME_EXTERNAL_MENU_BAR(f) false
#endif

/* True if frame F is currently visible.  */
#define FRAME_VISIBLE_P(f) (f)->visible

/* True if frame F is currently visible but hidden.  */
#define FRAME_OBSCURED_P(f) ((f)->visible > 1)

/* True if frame F is currently iconified.  */
#define FRAME_ICONIFIED_P(f) (f)->iconified

/* Mark frame F as currently garbaged.  */
#define SET_FRAME_GARBAGED(f)                           \
  (frame_garbaged = true, fset_redisplay (f), f->garbaged = true)

/* True if frame F is currently garbaged.  */
#define FRAME_GARBAGED_P(f) (f)->garbaged

/* True means do not allow splitting this frame's window.  */
#define FRAME_NO_SPLIT_P(f) (f)->no_split

/* Not really implemented.  */
#define FRAME_WANTS_MODELINE_P(f) (f)->wants_modeline

/* True if all windows except selected window and mini window
   are frozen on frame F.  */
#define FRAME_WINDOWS_FROZEN(f) (f)->frozen_window_starts

/* True if the frame's window configuration has changed since last call
   of run_window_size_change_functions.  */
#define FRAME_WINDOW_CONFIGURATION_CHANGED(f)   \
  (f)->window_configuration_changed

/* The minibuffer window of frame F, if it has one; otherwise nil.  */
#define FRAME_MINIBUF_WINDOW(f) f->minibuffer_window

/* The root window of the window tree of frame F.  */
#define FRAME_ROOT_WINDOW(f) f->root_window

/* The currently selected window of the window tree of frame F.  */
#define FRAME_SELECTED_WINDOW(f) f->selected_window

#define FRAME_INSERT_COST(f) (f)->insert_line_cost
#define FRAME_DELETE_COST(f) (f)->delete_line_cost
#define FRAME_INSERTN_COST(f) (f)->insert_n_lines_cost
#define FRAME_DELETEN_COST(f) (f)->delete_n_lines_cost
#define FRAME_FOCUS_FRAME(f) f->focus_frame

#ifdef HAVE_WINDOW_SYSTEM
/* This frame slot says whether scroll bars are currently enabled for frame F,
   and which side they are on.  */
#define FRAME_VERTICAL_SCROLL_BAR_TYPE(f) ((f)->vertical_scroll_bar_type)
#define FRAME_HAS_VERTICAL_SCROLL_BARS(f) \
  ((f)->vertical_scroll_bar_type != vertical_scroll_bar_none)
#define FRAME_HAS_VERTICAL_SCROLL_BARS_ON_LEFT(f) \
  ((f)->vertical_scroll_bar_type == vertical_scroll_bar_left)
#define FRAME_HAS_VERTICAL_SCROLL_BARS_ON_RIGHT(f) \
  ((f)->vertical_scroll_bar_type == vertical_scroll_bar_right)
#else /* not HAVE_WINDOW_SYSTEM */
/* If there is no window system, there are no scroll bars.  */
#define FRAME_VERTICAL_SCROLL_BAR_TYPE(f) \
  ((void) (f), vertical_scroll_bar_none)
#define FRAME_HAS_VERTICAL_SCROLL_BARS(f) ((void) (f), 0)
#define FRAME_HAS_VERTICAL_SCROLL_BARS_ON_LEFT(f) ((void) (f), 0)
#define FRAME_HAS_VERTICAL_SCROLL_BARS_ON_RIGHT(f) ((void) (f), 0)
#endif /* HAVE_WINDOW_SYSTEM */

#if defined (HAVE_WINDOW_SYSTEM)
#define FRAME_UNDECORATED(f) ((f)->undecorated)
#ifdef HAVE_NTGUI
#define FRAME_OVERRIDE_REDIRECT(f) ((void) (f), 0)
#else
#define FRAME_OVERRIDE_REDIRECT(f) ((f)->override_redirect)
#endif
#define FRAME_PARENT_FRAME(f)                   \
  (NILP ((f)->parent_frame)                     \
   ? NULL                                       \
   : XFRAME ((f)->parent_frame))
#define FRAME_SKIP_TASKBAR(f) ((f)->skip_taskbar)
#define FRAME_NO_FOCUS_ON_MAP(f) ((f)->no_focus_on_map)
#define FRAME_NO_ACCEPT_FOCUS(f) ((f)->no_accept_focus)
#define FRAME_NO_SPECIAL_GLYPHS(f) ((f)->no_special_glyphs)
#define FRAME_Z_GROUP(f) ((f)->z_group)
#define FRAME_Z_GROUP_NONE(f) ((f)->z_group == z_group_none)
#define FRAME_Z_GROUP_ABOVE(f) ((f)->z_group == z_group_above)
#define FRAME_Z_GROUP_ABOVE_SUSPENDED(f)        \
  ((f)->z_group == z_group_above_suspended)
#define FRAME_Z_GROUP_BELOW(f) ((f)->z_group == z_group_below)
#define FRAME_TOOLTIP_P(f) ((f)->tooltip)
#ifdef NS_IMPL_COCOA
#define FRAME_NS_APPEARANCE(f) ((f)->ns_appearance)
#define FRAME_NS_TRANSPARENT_TITLEBAR(f) ((f)->ns_transparent_titlebar)
#endif
#else /* not HAVE_WINDOW_SYSTEM */
#define FRAME_UNDECORATED(f) ((void) (f), 0)
#define FRAME_OVERRIDE_REDIRECT(f) ((void) (f), 0)
#define FRAME_PARENT_FRAME(f) ((void) (f), NULL)
#define FRAME_SKIP_TASKBAR(f) ((void) (f), 0)
#define FRAME_NO_FOCUS_ON_MAP(f) ((void) (f), 0)
#define FRAME_NO_ACCEPT_FOCUS(f) ((void) (f), 0)
#define FRAME_NO_SPECIAL_GLYPHS(f) ((void) (f), 0)
#define FRAME_Z_GROUP(f) ((void) (f), z_group_none)
#define FRAME_Z_GROUP_NONE(f) ((void) (f), true)
#define FRAME_Z_GROUP_ABOVE(f) ((void) (f), false)
#define FRAME_Z_GROUP_BELOW(f) ((void) (f), false)
#define FRAME_TOOLTIP_P(f) ((void) f, false)
#endif /* HAVE_WINDOW_SYSTEM */

/* Whether horizontal scroll bars are currently enabled for frame F.  */
#if USE_HORIZONTAL_SCROLL_BARS
#define FRAME_HAS_HORIZONTAL_SCROLL_BARS(f) \
  ((f)->horizontal_scroll_bars)
#else
#define FRAME_HAS_HORIZONTAL_SCROLL_BARS(f) ((void) (f), 0)
#endif

/* Width that a scroll bar in frame F should have, if there is one.
   Measured in pixels.
   If scroll bars are turned off, this is still nonzero.  */
#define FRAME_CONFIG_SCROLL_BAR_WIDTH(f) ((f)->config_scroll_bar_width)

/* Height that a scroll bar in frame F should have, if there is one.
   Measured in pixels.
   If scroll bars are turned off, this is still nonzero.  */
#define FRAME_CONFIG_SCROLL_BAR_HEIGHT(f) ((f)->config_scroll_bar_height)

/* Width that a scroll bar in frame F should have, if there is one.
   Measured in columns (characters).
   If scroll bars are turned off, this is still nonzero.  */
#define FRAME_CONFIG_SCROLL_BAR_COLS(f) ((f)->config_scroll_bar_cols)

/* Height that a scroll bar in frame F should have, if there is one.
   Measured in lines (characters).
   If scroll bars are turned off, this is still nonzero.  */
#define FRAME_CONFIG_SCROLL_BAR_LINES(f) ((f)->config_scroll_bar_lines)

/* Width of a left scroll bar in frame F, measured in pixels */
#define FRAME_LEFT_SCROLL_BAR_AREA_WIDTH(f)                             \
  (FRAME_HAS_VERTICAL_SCROLL_BARS_ON_LEFT (f)                           \
   ? FRAME_CONFIG_SCROLL_BAR_WIDTH (f)                                  \
   : 0)

/* Width of a right scroll bar area in frame F, measured in pixels */
#define FRAME_RIGHT_SCROLL_BAR_AREA_WIDTH(f)                            \
  (FRAME_HAS_VERTICAL_SCROLL_BARS_ON_RIGHT (f)                          \
   ? FRAME_CONFIG_SCROLL_BAR_WIDTH (f)                                  \
   : 0)

/* Width of a left scroll bar in frame F, measured in columns
   (characters), but only if scroll bars are on the left.  If scroll
   bars are on the right in this frame, or there are no scroll bars,
   value is 0.  */
#define FRAME_LEFT_SCROLL_BAR_COLS(f)                   \
  (FRAME_HAS_VERTICAL_SCROLL_BARS_ON_LEFT (f)           \
   ? FRAME_CONFIG_SCROLL_BAR_COLS (f)                   \
   : 0)

/* Width of a right scroll bar in frame F, measured in columns
   (characters), but only if scroll bars are on the right.  If scroll
   bars are on the left in this frame, or there are no scroll bars,
   value is 0.  */
#define FRAME_RIGHT_SCROLL_BAR_COLS(f)                  \
  (FRAME_HAS_VERTICAL_SCROLL_BARS_ON_RIGHT (f)          \
   ? FRAME_CONFIG_SCROLL_BAR_COLS (f)                   \
   : 0)

/* Width of a vertical scroll bar area in frame F, measured in
   pixels.  */
#define FRAME_SCROLL_BAR_AREA_WIDTH(f)          \
  (FRAME_HAS_VERTICAL_SCROLL_BARS (f)           \
   ? FRAME_CONFIG_SCROLL_BAR_WIDTH (f)          \
   : 0)

/* Height of horizontal scroll bar area in frame F, measured in
   pixels.  */
#define FRAME_SCROLL_BAR_AREA_HEIGHT(f) \
  (FRAME_HAS_HORIZONTAL_SCROLL_BARS (f) \
   ? FRAME_CONFIG_SCROLL_BAR_HEIGHT (f) \
   : 0)

/* Width of vertical scroll bar in frame F, measured in columns.  */
#define FRAME_SCROLL_BAR_COLS(f)      \
  (FRAME_HAS_VERTICAL_SCROLL_BARS (f) \
   ? FRAME_CONFIG_SCROLL_BAR_COLS (f) \
   : 0)

/* Height of horizontal scroll bar in frame F, measured in lines.  */
#define FRAME_SCROLL_BAR_LINES(f)       \
  (FRAME_HAS_HORIZONTAL_SCROLL_BARS (f) \
   ? FRAME_CONFIG_SCROLL_BAR_LINES (f)  \
   : 0)

/* Total width of frame F, in columns (characters),
   including the width used by scroll bars if any.  */
#define FRAME_TOTAL_COLS(f) ((f)->total_cols)

/* Total height of frame F, in lines (characters),
   including the height used by scroll bars if any.  */
#define FRAME_TOTAL_LINES(f) ((f)->total_lines)

/* Set the character widths of frame F.  WIDTH specifies a nominal
   character text width.  */
#define SET_FRAME_COLS(f, width)                                        \
  ((f)->text_cols = (width),                                            \
   (f)->total_cols = ((width)                                           \
                      + FRAME_SCROLL_BAR_COLS (f)                       \
                      + FRAME_FRINGE_COLS (f)))

/* Set the character heights of frame F.  HEIGHT specifies a nominal
   character text height.  */
#define SET_FRAME_LINES(f, height)                                      \
  ((f)->text_lines = (height),                                          \
   (f)->total_lines = ((height)                                         \
                       + FRAME_TOP_MARGIN (f)                           \
                       + FRAME_SCROLL_BAR_LINES (f)))

/* Set the widths of frame F.  WIDTH specifies a nominal pixel text
   width.  */
#define SET_FRAME_WIDTH(f, width)                                       \
  ((f)->text_width = (width),                                           \
   (f)->pixel_width = ((width)                                          \
                       + FRAME_SCROLL_BAR_AREA_WIDTH (f)                \
                       + FRAME_TOTAL_FRINGE_WIDTH (f)                   \
                       + 2 * FRAME_INTERNAL_BORDER_WIDTH (f)))

/* Set the heights of frame F.  HEIGHT specifies a nominal pixel text
   height.  */
#define SET_FRAME_HEIGHT(f, height)                                     \
  ((f)->text_height = (height),                                         \
   (f)->pixel_height = ((height)                                        \
                        + FRAME_TOP_MARGIN_HEIGHT (f)                   \
                        + FRAME_SCROLL_BAR_AREA_HEIGHT (f)              \
                        + 2 * FRAME_INTERNAL_BORDER_WIDTH (f)))

/* Maximum + 1 legitimate value for FRAME_CURSOR_X.  */
#define FRAME_CURSOR_X_LIMIT(f) \
  (FRAME_COLS (f) + FRAME_LEFT_SCROLL_BAR_COLS (f))

/* Nonzero if frame F has scroll bars.  */
#define FRAME_SCROLL_BARS(f) (f->scroll_bars)
#define FRAME_CONDEMNED_SCROLL_BARS(f) (f->condemned_scroll_bars)

#define FRAME_MENU_BAR_ITEMS(f) (f->menu_bar_items)
#define FRAME_COST_BAUD_RATE(f) ((f)->cost_calculation_baud_rate)

#define FRAME_DESIRED_CURSOR(f) ((f)->desired_cursor)
#define FRAME_BLINK_OFF_CURSOR(f) ((f)->blink_off_cursor)
#define FRAME_CURSOR_WIDTH(f) ((f)->cursor_width)
#define FRAME_BLINK_OFF_CURSOR_WIDTH(f) ((f)->blink_off_cursor_width)

#define FRAME_FOREGROUND_PIXEL(f) ((f)->foreground_pixel)
#define FRAME_BACKGROUND_PIXEL(f) ((f)->background_pixel)

/* Return a pointer to the face cache of frame F.  */

#define FRAME_FACE_CACHE(F)     (F)->face_cache

/* Return the size of message_buf of the frame F.  We multiply the
   width of the frame by 4 because multi-byte form may require at most
   4-byte for a character.  */

#define FRAME_MESSAGE_BUF_SIZE(f) (((int) FRAME_COLS (f)) * 4)

#define CHECK_FRAME(x) \
  CHECK_TYPE (FRAMEP (x), Qframep, x)

#define CHECK_LIVE_FRAME(x) \
  CHECK_TYPE (FRAMEP (x) && FRAME_LIVE_P (XFRAME (x)), Qframe_live_p, x)

/* FOR_EACH_FRAME (LIST_VAR, FRAME_VAR) followed by a statement is a
   `for' loop which iterates over the elements of Vframe_list.  The
   loop will set FRAME_VAR, a Lisp_Object, to each frame in
   Vframe_list in succession and execute the statement.  LIST_VAR
   should be a Lisp_Object too; it is used to iterate through the
   Vframe_list.  Note that this macro walks over child frames and
   the tooltip frame as well.

   This macro is a holdover from a time when multiple frames weren't always
   supported.  An alternate definition of the macro would expand to
   something which executes the statement once.  */

#define FOR_EACH_FRAME(list_var, frame_var)     \
  for ((list_var) = Vframe_list;                \
       (CONSP (list_var)                        \
        && (frame_var = XCAR (list_var), true)); \
       list_var = XCDR (list_var))

/* Reflect mouse movement when a complete frame update is performed.  */

#define FRAME_MOUSE_UPDATE(frame)                               \
  do {                                                          \
    Mouse_HLInfo *hlinfo = MOUSE_HL_INFO (frame);               \
    if (frame == hlinfo->mouse_face_mouse_frame)                \
      {                                                         \
        block_input ();                                         \
        note_mouse_highlight (hlinfo->mouse_face_mouse_frame,   \
                              hlinfo->mouse_face_mouse_x,       \
                              hlinfo->mouse_face_mouse_y);      \
        unblock_input ();                                       \
      }                                                         \
  } while (false)

/* Handy macro to construct an argument to Fmodify_frame_parameters.  */

#define AUTO_FRAME_ARG(name, parameter, value)  \
  AUTO_LIST1 (name, AUTO_CONS_EXPR (parameter, value))

/* False means there are no visible garbaged frames.  */
extern bool frame_garbaged;

/* Set visibility of frame F.
   We call redisplay_other_windows to make sure the frame gets redisplayed
   if some changes were applied to it while it wasn't visible (and hence
   wasn't redisplayed).  */

INLINE void
SET_FRAME_VISIBLE (struct frame *f, int v)
{
  eassert (0 <= v && v <= 2);
  if (v)
    {
      if (v == 1 && f->visible != 1)
        redisplay_other_windows ();
      if (FRAME_GARBAGED_P (f))
        frame_garbaged = true;
    }
  f->visible = v;
}

/* Set iconify of frame F.  */

#define SET_FRAME_ICONIFIED(f, i)                       \
  (f)->iconified = (eassert (0 <= (i) && (i) <= 1), (i))

extern Lisp_Object selected_frame;

#if ! (defined USE_GTK || defined HAVE_NS)
extern int frame_default_tool_bar_height;
#endif

#ifdef HAVE_WINDOW_SYSTEM
# define WINDOW_SYSTEM_RETURN
#else
# define WINDOW_SYSTEM_RETURN _Noreturn
#endif

extern WINDOW_SYSTEM_RETURN struct frame *
  decode_window_system_frame (Lisp_Object);
extern struct frame *decode_live_frame (Lisp_Object);
extern struct frame *decode_any_frame (Lisp_Object);
extern struct frame *make_initial_frame (void);
extern struct frame *make_frame (bool);
#ifdef HAVE_WINDOW_SYSTEM
extern struct frame *make_minibuffer_frame (void);
extern struct frame *make_frame_without_minibuffer (Lisp_Object,
                                                    struct kboard *,
                                                    Lisp_Object);
extern bool display_available (void);
#endif

INLINE bool
window_system_available (struct frame *f)
{
#ifdef HAVE_WINDOW_SYSTEM
  return f ? FRAME_WINDOW_P (f) || FRAME_MSDOS_P (f) : display_available ();
#else
  return false;
#endif
}

extern WINDOW_SYSTEM_RETURN void check_window_system (struct frame *);
extern void frame_make_pointer_invisible (struct frame *);
extern void frame_make_pointer_visible (struct frame *);
extern Lisp_Object delete_frame (Lisp_Object, Lisp_Object);
extern bool frame_inhibit_resize (struct frame *, bool, Lisp_Object);
extern void adjust_frame_size (struct frame *, int, int, int, bool, Lisp_Object);
extern void frame_size_history_add (struct frame *f, Lisp_Object fun_symbol,
                                    int width, int height, Lisp_Object rest);

extern Lisp_Object Vframe_list;

/* Value is a pointer to the selected frame.  If the selected frame
   isn't live, abort.  */

#define SELECTED_FRAME()                                \
     ((FRAMEP (selected_frame)                          \
       && FRAME_LIVE_P (XFRAME (selected_frame)))       \
      ? XFRAME (selected_frame)                         \
      : (emacs_abort (), (struct frame *) 0))

\f
/***********************************************************************
                        Display-related Macros
 ***********************************************************************/

/* Canonical y-unit on frame F.
   This value currently equals the line height of the frame (which is
   the height of the default font of F).  */
#define FRAME_LINE_HEIGHT(F) ((F)->line_height)

/* Canonical x-unit on frame F.
   This value currently equals the average width of the default font of F.  */
#define FRAME_COLUMN_WIDTH(F) ((F)->column_width)

/* Get a frame's window system dimension.  If no window system, this is 0.  */

INLINE int
frame_dimension (int x)
{
#ifdef HAVE_WINDOW_SYSTEM
  return x;
#else
  return 0;
#endif
}

/* Total width of fringes reserved for drawing truncation bitmaps,
   continuation bitmaps and alike.  The width is in canonical char
   units of the frame.  This must currently be the case because window
   sizes aren't pixel values.  If it weren't the case, we wouldn't be
   able to split windows horizontally nicely.  */
INLINE int
FRAME_FRINGE_COLS (struct frame *f)
{
  return frame_dimension (f->fringe_cols);
}

/* Pixel-width of the left and right fringe.  */

INLINE int
FRAME_LEFT_FRINGE_WIDTH (struct frame *f)
{
  return frame_dimension (f->left_fringe_width);
}
INLINE int
FRAME_RIGHT_FRINGE_WIDTH (struct frame *f)
{
  return frame_dimension (f->right_fringe_width);
}

/* Total width of fringes in pixels.  */

INLINE int
FRAME_TOTAL_FRINGE_WIDTH (struct frame *f)
{
  return FRAME_LEFT_FRINGE_WIDTH (f) + FRAME_RIGHT_FRINGE_WIDTH (f);
}

/* Pixel-width of internal border lines.  */
INLINE int
FRAME_INTERNAL_BORDER_WIDTH (struct frame *f)
{
  return frame_dimension (f->internal_border_width);
}

/* Pixel-size of window divider lines.  */
INLINE int
FRAME_RIGHT_DIVIDER_WIDTH (struct frame *f)
{
  return frame_dimension (f->right_divider_width);
}

INLINE int
FRAME_BOTTOM_DIVIDER_WIDTH (struct frame *f)
{
  return frame_dimension (f->bottom_divider_width);
}
\f
/***********************************************************************
            Conversion between canonical units and pixels
 ***********************************************************************/

/* Canonical x-values are fractions of FRAME_COLUMN_WIDTH, canonical
   y-unit are fractions of FRAME_LINE_HEIGHT of a frame.  Both are
   represented as Lisp numbers, i.e. integers or floats.  */

/* Convert canonical value X to pixels.  F is the frame whose
   canonical char width is to be used.  X must be a Lisp integer or
   float.  Value is a C integer.  */
#define FRAME_PIXEL_X_FROM_CANON_X(F, X)                \
  (INTEGERP (X)                                         \
   ? XINT (X) * FRAME_COLUMN_WIDTH (F)                  \
   : (int) (XFLOAT_DATA (X) * FRAME_COLUMN_WIDTH (F)))

/* Convert canonical value Y to pixels.  F is the frame whose
   canonical character height is to be used.  X must be a Lisp integer
   or float.  Value is a C integer.  */
#define FRAME_PIXEL_Y_FROM_CANON_Y(F, Y)                \
  (INTEGERP (Y)                                         \
   ? XINT (Y) * FRAME_LINE_HEIGHT (F)                   \
   : (int) (XFLOAT_DATA (Y) * FRAME_LINE_HEIGHT (F)))

/* Convert pixel-value X to canonical units.  F is the frame whose
   canonical character width is to be used.  X is a C integer.  Result
   is a Lisp float if X is not a multiple of the canon width,
   otherwise it's a Lisp integer.  */
#define FRAME_CANON_X_FROM_PIXEL_X(F, X)                        \
  ((X) % FRAME_COLUMN_WIDTH (F) != 0                            \
   ? make_float ((double) (X) / FRAME_COLUMN_WIDTH (F))         \
   : make_number ((X) / FRAME_COLUMN_WIDTH (F)))

/* Convert pixel-value Y to canonical units.  F is the frame whose
   canonical character height is to be used.  Y is a C integer.
   Result is a Lisp float if Y is not a multiple of the canon width,
   otherwise it's a Lisp integer.  */
#define FRAME_CANON_Y_FROM_PIXEL_Y(F, Y)                        \
  ((Y) % FRAME_LINE_HEIGHT (F)                                  \
   ? make_float ((double) (Y) / FRAME_LINE_HEIGHT (F))          \
   : make_number ((Y) / FRAME_LINE_HEIGHT (F)))


\f
/* Manipulating pixel sizes and character sizes.
   Knowledge of which factors affect the overall size of the window should
   be hidden in these macros, if that's possible.

   Return the upper/left pixel position of the character cell on frame F
   at ROW/COL.  */
#define FRAME_LINE_TO_PIXEL_Y(f, row)                                   \
  (((row) < FRAME_TOP_MARGIN (f) ? 0 : FRAME_INTERNAL_BORDER_WIDTH (f)) \
   + (row) * FRAME_LINE_HEIGHT (f))

#define FRAME_COL_TO_PIXEL_X(f, col)            \
  (FRAME_INTERNAL_BORDER_WIDTH (f)              \
   + (col) * FRAME_COLUMN_WIDTH (f))

/* Return the pixel width/height of frame F if it has
   COLS columns/LINES rows.  */
#define FRAME_TEXT_COLS_TO_PIXEL_WIDTH(f, cols) \
  ((cols) * FRAME_COLUMN_WIDTH (f)              \
   + FRAME_SCROLL_BAR_AREA_WIDTH (f)            \
   + FRAME_TOTAL_FRINGE_WIDTH (f)               \
   + 2 * FRAME_INTERNAL_BORDER_WIDTH (f))

#define FRAME_TEXT_LINES_TO_PIXEL_HEIGHT(f, lines) \
  ((lines) * FRAME_LINE_HEIGHT (f)                 \
   + FRAME_TOP_MARGIN_HEIGHT (f)                   \
   + FRAME_SCROLL_BAR_AREA_HEIGHT (f)              \
   + 2 * FRAME_INTERNAL_BORDER_WIDTH (f))

/* Return the row/column (zero-based) of the character cell containing
   the pixel on FRAME at Y/X.  */
#define FRAME_PIXEL_Y_TO_LINE(f, y)                                     \
  (((y) < FRAME_TOP_MARGIN_HEIGHT (f)                                   \
    ? (y)                                                               \
    : ((y) < (FRAME_TOP_MARGIN_HEIGHT (f)                               \
              + FRAME_INTERNAL_BORDER_WIDTH (f))                        \
       ? (y) - (FRAME_TOP_MARGIN_HEIGHT (f)                             \
                + FRAME_INTERNAL_BORDER_WIDTH (f)                       \
                /* Arrange for the division to round down.  */          \
                + FRAME_LINE_HEIGHT (f) - 1)                            \
       : (y) - FRAME_INTERNAL_BORDER_WIDTH (f)))                        \
   / FRAME_LINE_HEIGHT (f))

#define FRAME_PIXEL_X_TO_COL(f, x)              \
  (((x) - FRAME_INTERNAL_BORDER_WIDTH (f))      \
   / FRAME_COLUMN_WIDTH (f))

/* How many columns/rows of text can we fit in WIDTH/HEIGHT pixels on
   frame F (so we round down)?  */
#define FRAME_PIXEL_WIDTH_TO_TEXT_COLS(f, width)                        \
  (((width)                                                             \
    - FRAME_TOTAL_FRINGE_WIDTH (f)                                      \
    - FRAME_SCROLL_BAR_AREA_WIDTH (f)                                   \
    - 2 * FRAME_INTERNAL_BORDER_WIDTH (f))                              \
   / FRAME_COLUMN_WIDTH (f))                                            \

#define FRAME_PIXEL_HEIGHT_TO_TEXT_LINES(f, height)                     \
  (((height)                                                            \
    - FRAME_TOP_MARGIN_HEIGHT (f)                                       \
    - FRAME_SCROLL_BAR_AREA_HEIGHT (f)                                  \
    - 2 * FRAME_INTERNAL_BORDER_WIDTH (f))                              \
   / FRAME_LINE_HEIGHT (f))

/* Return the pixel width/height of frame F with a text size of
   width/height.  */
#define FRAME_TEXT_TO_PIXEL_WIDTH(f, width)       \
  ((width)                                        \
   + FRAME_SCROLL_BAR_AREA_WIDTH (f)              \
   + FRAME_TOTAL_FRINGE_WIDTH (f)                 \
   + 2 * FRAME_INTERNAL_BORDER_WIDTH (f))

#define FRAME_TEXT_TO_PIXEL_HEIGHT(f, height)        \
  ((height)                                          \
   + FRAME_TOP_MARGIN_HEIGHT (f)                     \
   + FRAME_SCROLL_BAR_AREA_HEIGHT (f)                \
   + 2 * FRAME_INTERNAL_BORDER_WIDTH (f))

/* Return the text width/height of frame F with a pixel size of
   width/height.  */
#define FRAME_PIXEL_TO_TEXT_WIDTH(f, width)       \
  ((width)                                        \
   - FRAME_SCROLL_BAR_AREA_WIDTH (f)              \
   - FRAME_TOTAL_FRINGE_WIDTH (f)                 \
   - 2 * FRAME_INTERNAL_BORDER_WIDTH (f))

#define FRAME_PIXEL_TO_TEXT_HEIGHT(f, height)           \
  ((height)                                             \
   - FRAME_TOP_MARGIN_HEIGHT (f)                        \
   - FRAME_SCROLL_BAR_AREA_HEIGHT (f)                   \
   - 2 * FRAME_INTERNAL_BORDER_WIDTH (f))

/* Return the width/height reserved for the windows of frame F.  */
#define FRAME_WINDOWS_WIDTH(f)                  \
  (FRAME_PIXEL_WIDTH (f)                        \
   - 2 * FRAME_INTERNAL_BORDER_WIDTH (f))

#define FRAME_WINDOWS_HEIGHT(f)                 \
  (FRAME_PIXEL_HEIGHT (f)                       \
   - FRAME_TOP_MARGIN_HEIGHT (f)                \
   - 2 * FRAME_INTERNAL_BORDER_WIDTH (f))

/* Value is the smallest width of any character in any font on frame F.  */
#define FRAME_SMALLEST_CHAR_WIDTH(f)            \
  FRAME_DISPLAY_INFO (f)->smallest_char_width

/* Value is the smallest height of any font on frame F.  */
#define FRAME_SMALLEST_FONT_HEIGHT(f)           \
  FRAME_DISPLAY_INFO (f)->smallest_font_height

/***********************************************************************
                                Frame Parameters
 ***********************************************************************/

#ifdef HAVE_WINDOW_SYSTEM

/* The class of this X application.  */
#define EMACS_CLASS "Emacs"

extern void x_set_scroll_bar_default_width (struct frame *);
extern void x_set_scroll_bar_default_height (struct frame *);
extern void x_set_offset (struct frame *, int, int, int);
extern void x_wm_set_size_hint (struct frame *f, long flags, bool user_position);
extern Lisp_Object x_new_font (struct frame *, Lisp_Object, int);
extern void x_set_frame_parameters (struct frame *, Lisp_Object);
extern void x_set_fullscreen (struct frame *, Lisp_Object, Lisp_Object);
extern void x_set_line_spacing (struct frame *, Lisp_Object, Lisp_Object);
extern void x_set_screen_gamma (struct frame *, Lisp_Object, Lisp_Object);
extern void x_set_font (struct frame *, Lisp_Object, Lisp_Object);
extern void x_set_font_backend (struct frame *, Lisp_Object, Lisp_Object);
extern void x_set_left_fringe (struct frame *, Lisp_Object, Lisp_Object);
extern void x_set_right_fringe (struct frame *, Lisp_Object, Lisp_Object);
extern void x_set_border_width (struct frame *, Lisp_Object, Lisp_Object);
extern void x_set_right_divider_width (struct frame *, Lisp_Object,
                                       Lisp_Object);
extern void x_set_bottom_divider_width (struct frame *, Lisp_Object,
                                        Lisp_Object);
extern void x_set_visibility (struct frame *, Lisp_Object, Lisp_Object);
extern void x_set_autoraise (struct frame *, Lisp_Object, Lisp_Object);
extern void x_set_autolower (struct frame *, Lisp_Object, Lisp_Object);
extern void x_set_unsplittable (struct frame *, Lisp_Object, Lisp_Object);
extern void x_set_vertical_scroll_bars (struct frame *, Lisp_Object, Lisp_Object);
extern void x_set_horizontal_scroll_bars (struct frame *, Lisp_Object, Lisp_Object);
extern void x_set_scroll_bar_width (struct frame *, Lisp_Object, Lisp_Object);
extern void x_set_scroll_bar_height (struct frame *, Lisp_Object, Lisp_Object);

extern long x_figure_window_size (struct frame *, Lisp_Object, bool, int *, int *);

extern void x_set_alpha (struct frame *, Lisp_Object, Lisp_Object);
extern void x_set_no_special_glyphs (struct frame *, Lisp_Object, Lisp_Object);

extern void validate_x_resource_name (void);

extern Lisp_Object display_x_get_resource (Display_Info *,
                                           Lisp_Object attribute,
                                           Lisp_Object class,
                                           Lisp_Object component,
                                           Lisp_Object subclass);

extern void set_frame_menubar (struct frame *f, bool first_time, bool deep_p);
extern void x_set_window_size (struct frame *f, bool change_gravity,
                               int width, int height, bool pixelwise);
extern Lisp_Object x_get_focus_frame (struct frame *);
extern void frame_set_mouse_pixel_position (struct frame *f, int pix_x, int pix_y);
extern void x_make_frame_visible (struct frame *f);
extern void x_make_frame_invisible (struct frame *f);
extern void x_iconify_frame (struct frame *f);
extern void x_set_frame_alpha (struct frame *f);
extern void x_activate_menubar (struct frame *);
extern void x_real_positions (struct frame *, int *, int *);
extern void free_frame_menubar (struct frame *);
extern void x_free_frame_resources (struct frame *);
extern bool frame_ancestor_p (struct frame *af, struct frame *df);
extern enum internal_border_part frame_internal_border_part (struct frame *f, int x, int y);

#if defined HAVE_X_WINDOWS
extern void x_wm_set_icon_position (struct frame *, int, int);
#if !defined USE_X_TOOLKIT
extern char *x_get_resource_string (const char *, const char *);
#endif
extern void x_sync (struct frame *);
#endif /* HAVE_X_WINDOWS */

extern void x_query_colors (struct frame *f, XColor *, int);
extern void x_focus_frame (struct frame *, bool);

#ifndef HAVE_NS

extern bool x_bitmap_icon (struct frame *, Lisp_Object);

/* Set F's bitmap icon, if specified among F's parameters.  */

INLINE void
x_set_bitmap_icon (struct frame *f)
{
  Lisp_Object obj = assq_no_quit (Qicon_type, f->param_alist);

  if (CONSP (obj) && !NILP (XCDR (obj)))
    x_bitmap_icon (f, XCDR (obj));
}

#endif /* !HAVE_NS */
#endif /* HAVE_WINDOW_SYSTEM */

INLINE void
flush_frame (struct frame *f)
{
  struct redisplay_interface *rif = FRAME_RIF (f);

  if (rif && rif->flush_display)
    rif->flush_display (f);
}

/***********************************************************************
                        Multimonitor data
 ***********************************************************************/

#ifdef HAVE_WINDOW_SYSTEM

struct MonitorInfo {
  XRectangle geom, work;
  int mm_width, mm_height;
  char *name;
};

extern void free_monitors (struct MonitorInfo *monitors, int n_monitors);
extern Lisp_Object make_monitor_attribute_list (struct MonitorInfo *monitors,
                                                int n_monitors,
                                                int primary_monitor,
                                                Lisp_Object monitor_frames,
                                                const char *source);

#endif /* HAVE_WINDOW_SYSTEM */


INLINE_HEADER_END

/* Suppress -Wsuggest-attribute=const if there are no scroll bars.
   This is for functions like x_set_horizontal_scroll_bars that have
   no effect in this case.  */
#if ! USE_HORIZONTAL_SCROLL_BARS && GNUC_PREREQ (4, 6, 0)
# pragma GCC diagnostic ignored "-Wsuggest-attribute=const"
#endif

#endif /* not EMACS_FRAME_H */