xref: /xsrc/external/mit/ctwm/dist/screen.h

/*
 * twm per-screen data include file
 *
 *
 * Copyright 1989 Massachusetts Institute of Technology
 *
 * $XConsortium: screen.h,v 1.62 91/05/01 17:33:09 keith Exp $
 *
 * 11-3-88 Dave Payne, Apple Computer                   File created
 *
 * Copyright 1992 Claude Lecommandeur.
 */

#ifndef _CTWM_SCREEN_H
#define _CTWM_SCREEN_H

/* Needed for doxygen to get at the #define's for config (like EMWH) */
#ifdef DOXYGEN
# include "ctwm_config.h"
#endif

#include "menus.h"  // embedded MouseButton/Func{Button,Key}
#include "workspace_structs.h"  // embedded ScreenInfo.workSpaceMgr


/**
 * Type for iconification styles.  Options correspond to the values in
 * IconifyStyle config var.  \sa ScreenInfo.IconifyStyle   \todo Maybe
 * should just be moved inline in ScreenInfo struct, since it's never
 * directly used elsewhere.
 */
typedef enum {
	ICONIFY_NORMAL,
	ICONIFY_MOSAIC,
	ICONIFY_ZOOMIN,
	ICONIFY_ZOOMOUT,
	ICONIFY_FADE,
	ICONIFY_SWEEP,
} IcStyle;


/**
 * Information about some XStandardColormap we're using.  See Xlib docs
 * for details.
 */
struct StdCmap {
	struct StdCmap *next;               /* next link in chain */
	Atom atom;                          /* property from which this came */
	int nmaps;                          /* number of maps below */
	XStandardColormap *maps;            /* the actual maps */
};


/**
 * Internal padding in the size window.  \sa ScreenInfo.SizeWindow
 * \todo Possibly these should be in another header...
 */
#define SIZE_HINDENT 10
#define SIZE_VINDENT 2  ///< \copydoc #SIZE_HINDENT


/**
 * Stash for memoizing various pixmaps used in titlebars.
 * \sa the TBPM_* constants in image.h
 * \todo This probably doesn't need to live on its own, since it only
 * exists to define a member in the ScreenInfo struct.  Maybe it should
 * just be moved to being defined nested in there...
 */
struct TitlebarPixmaps {
	Pixmap xlogo;    ///< #TBPM_XLOGO
	Pixmap resize;   ///< #TBPM_RESIZE
	Pixmap question; ///< #TBPM_QUESTION
	Pixmap menu;     ///< #TBPM_MENU
	Pixmap delete;   ///< #TBPM_DOT
};


/**
 * Info and control for each X Screen we control.
 *
 * We start up on an X Display (e.g., ":0"), and by default try to take
 * over each X Screen on that display (e.g, ":0.0", ":0.1", ...).  Each
 * of those Screens will have its own ScreenInfo.
 *
 * This contains pure physical or X info (size, coordinates, color
 * depth), ctwm info (lists of windows on it, window rings, how it fits
 * with other Screens we control), most of the config file settings which
 * may differ from Screen to Screen, menus, special windows (Occupy,
 * Identify, etc), and piles of other stuff.
 *
 * \note
 * Possibly this should be broken up somewhat.  e.g., much of the
 * config-related bits pulled out into their own structure, which could
 * allow decoupling the config parsing from the X screens a bit.
 */
struct ScreenInfo {
	int screen;       ///< Which screen (i.e., the x after the dot in ":0.x")

	int d_depth;      ///< Copy of DefaultDepth(dpy, screen)
	Visual *d_visual; ///< Copy of DefaultVisual(dpy, screen)
	int Monochrome;   ///< Is the display monochrome?

	/**
	 * The x coordinate of the root window relative to RealRoot.  This is
	 * usually 0, except in the case of captive mode where it shows where
	 * we are on the real screen, or when we have VirtualScreens and are
	 * positioning our real Screens on a virtual RealRoot.
	 */
	int rootx;
	/// The y coordinate of the root window relative to RealRoot.
	/// \copydetails rootx
	int rooty;

	int rootw; ///< Copy of DisplayWidth(dpy, screen)
	int rooth; ///< Copy of DisplayHeight(dpy, screen)

	int mm_w;  ///< Physical mm width of the root
	int mm_h;  ///< Physical mm height of the root

#ifdef CAPTIVE
	/**
	 * \defgroup scr_captive_bits Captive ctwm bits
	 * These are various fields related to running a captive ctwm (i.e.,
	 * with \--window).  They'll generally be empty for non-captive
	 * invocations, or describe our position inside the "outside" world
	 * if we are.
	 * @{
	 */
	/// The name of the captive root window if any.  Autogen'd or set
	/// with \--name
	char *captivename;
	/// The x coordinate of the captive root window if any.
	int crootx;
	/// The y coordinate of the captive root window if any.
	int crooty;
	/// Initially copy of DisplayWidth(dpy, screen).  See also
	/// ConfigureCaptiveRootWindow()
	int crootw;
	/// Initially copy of DisplayHeight(dpy, screen).
	/// \copydetails crootw
	int crooth;
	/// @}
#endif

	int MaxWindowWidth;   ///< Largest window width to allow
	int MaxWindowHeight;  ///< Largest window height to allow

	/// The head of the screen's twm window list.  This is used for
	/// places where we need to iterate over the TwmWindow's in a single
	/// Screen, by following the TwmWindow.next pointers.
	TwmWindow *FirstWindow;

	Colormaps RootColormaps;  ///< The colormaps of the root window


	/**
	 * \defgroup scr_roots Various root and pseudo-root Windows.
	 * These are the various forms of root and almost-root windows that
	 * things on this Screen reside in.  It's probable that there's a lot
	 * of confusion of these, and they get set, reset, and used
	 * incorrectly in a lot of places.  We mostly get away with it
	 * because in normal usage, they're often all identical.
	 *
	 * \verbatim
	 *
	 *  +--RealRoot-----------------------------------------------------------+
	 *  | the root of the display (most uses of this are probably incorrect!) |
	 *  |                                                                     |
	 *  |   +--CaptiveRoot--------------------------------------------------+ |
	 *  |   | when captive window is used (most uses are likely incorrect!) | |
	 *  |   |                                                               | |
	 *  |   | +--XineramaRoot---------------------------------------------+ | |
	 *  |   | | the root that encompasses all virtual screens             | | |
	 *  |   | |                                                           | | |
	 *  |   | | +--Root-----------+ +--Root--------+ +--Root------------+ | | |
	 *  |   | | | one or more     | | Most cases   | |                  | | | |
	 *  |   | | | virtual screens | | use Root.    | |                  | | | |
	 *  |   | | |                 | |              | |                  | | | |
	 *  |   | | |                 | |              | |                  | | | |
	 *  |   | | +-----------------+ +--------------+ +------------------+ | | |
	 *  |   | +-----------------------------------------------------------+ | |
	 *  |   +---------------------------------------------------------------+ |
	 *  +---------------------------------------------------------------------+
	 * \endverbatim
	 *
	 * @{
	 */

	/**
	 * Root window for the current vscreen.  Initially either the real X
	 * RootWindow(), or the existing or created Window for a captive
	 * ctwm.  Gets reset to a vscreen's window in InitVirtualScreens().
	 */
	Window Root;

	/**
	 * Root window holding our vscreens.  Initialized to the same value
	 * as ScreenInfo.Root, and isn't changed afterward.
	 */
	Window XineramaRoot;
#ifdef CAPTIVE
	/// The captive root window, if any, or None
	Window CaptiveRoot;
#endif
	/// The actual X root window of the display.  This is always X's
	/// RootWindow().
	Window RealRoot;
	/// @}

	/// Layout of our roow window and monitor(s).
	RLayout *Layout;
	/// Layout taking into account Border{Top,Left,Right,Bottom} config
	/// params.
	RLayout *BorderedLayout;

	/**
	 * Dimensions/coordinates window.  This is the small window (usually
	 * in the upper left of the screen, unless
	 * ScreenInfo.CenterFeedbackWindow is set) that shows
	 * dimensions/coordinates for resize/move operations.
	 */
	Window SizeWindow;

	/**
	 * Window info window.  This is the window that pops up with the
	 * various information when you f.identify a window, and also the
	 * truncated version of that that f.version pulls up.
	 */
	struct _InfoWindow {
		Window       win;          ///< Actual X window
		bool         mapped;       ///< Whether it's currently up
		int          lines;        ///< Current number of lines
		unsigned int width;        ///< Current size
		unsigned int height;       ///< Current size
	} InfoWindow; ///< \copydoc ScreenInfo::_InfoWindow
	/*
	 * Naming this struct type is pointless, but necessary for doxygen to
	 * not barf on it.  The copydoc is needed so the desc shows up in the
	 * ScreenInfo docs as well as the struct's own.
	 */

	/**
	 * \defgroup scr_maskwin Screen masking window stuff
	 * These are bits for a window that covers up everything on the
	 * screen during startup if we're showing the "Welcome window"
	 * splash screen.  That is, if ScreenInfo.ShowWelcomeWindow is true.
	 * @{
	 */
	/// Startup splash screen masking window if
	/// ScreenInfo.ShowWelcomeWindow
	Window WindowMask;
	/// Utility window for animated icons
	Window ShapeWindow;
	/// Image to show on ScreenInfo.WindowMask
	Image *WelcomeImage;
	/// GC for drawing ScreenInfo.WelcomeImage on ScreenInfo.WindowMask
	GC     WelcomeGC;
	/// Colormap for ScreenInfo.WindowMask
	Colormap WelcomeCmap;
	/// @}

	name_list *ImageCache;  ///< Cached pixmaps used in image loading
	TitlebarPixmaps tbpm;   ///< Memoized titlebar pixmaps
	Image *UnknownImage;    ///< Fallback icon pixmap
	Pixmap siconifyPm;      ///< In-icon manager iconifed marker pixmap
	Pixmap pullPm;          ///< In-menu submenu item marker icon
	unsigned int pullW;     ///< Dimensions of ScreenInfo.pullPm
	unsigned int pullH;     ///< Dimensions of ScreenInfo.pullPm

	/**
	 * Name of titlebar focus hilite image if any.  This is an
	 * alternative to the builtin shading on the titlebar when a window
	 * has focus.  See Pixmaps config var.
	 */
	char *HighlightPixmapName;

	/// \defgroup scr_menu_bits Various menus
	/// These hold references to the various menus on the Screen.
	/// @{
	MenuRoot *MenuList;    ///< Head of the menu list
	MenuRoot *LastMenu;    ///< Temp var used in creating the Screen's menus
	MenuRoot *Windows;     ///< f.menu TwmWindows
	MenuRoot *Icons;       ///< f.menu TwmIcons
	MenuRoot *Workspaces;  ///< f.menu TwmWorkspaces
	MenuRoot *AllWindows;  ///< f.menu TwmAllWindows

	/*Added by dl 2004 */
	MenuRoot *AllIcons;    ///< f.menu TwmAllIcons

	/* Added by Dan Lilliehorn (dl@dl.nu) 2000-02-29)     */
	MenuRoot *Keys;        ///< f.menu TwmKeys
	MenuRoot *Visible;     ///< f.menu TwmVisible

	/// @}

	TwmWindow *Ring;       ///< One of the windows in the Screen's ring
	TwmWindow *RingLeader; ///< Current window in ring

	MouseButton DefaultFunction;   ///< DefaultFunction config var
	MouseButton WindowFunction;    ///< WindowFunction config var
	MouseButton ChangeWorkspaceFunction; ///< ChangeWorkspaceFunction config var
	MouseButton DeIconifyFunction; ///< DeIconifyFunction config var
	MouseButton IconifyFunction;   ///< IconifyFunction config var

	/// Various colormaps used on the Screen.  These probably have little
	/// effect in a world where 24bpp is a baseline...
	struct _cmapInfo {
		Colormaps *cmaps;  ///< Current list of colormap windows
		int maxCmaps;      ///< Maximum number of installed colormaps
		/// seq # for first XInstallColormap() req in pass thru loading a
		/// colortable list
		unsigned long first_req;
		/// current push level to install root colormap windows
		int root_pushes;
		/// saved colormaps to install when pushes drops to zero
		Colormaps *pushed_cmaps;
	} cmapInfo; ///< \copydoc ScreenInfo::_cmapInfo
	///< \todo Somebody needs to understand and document this better.
	// x-ref trailing comment on InfoWindow above

	/**
	 * Various XStandardColormaps on the screen.  See Xlib documentation
	 * for XStandardColormaps (e.g.,
	 * <https://www.x.org/releases/X11R7.7/doc/libX11/libX11/libX11.html#Standard_Colormaps>)
	 * if you need to make sense of it.
	 */
	struct _StdCmapInfo {
		StdCmap *head;         ///< list of maps
		StdCmap *tail;         ///< list of maps
		StdCmap *mru;          ///< Most recently used in list
		int mruindex;          ///< index of mru in entry
	} StdCmapInfo; ///< \copydoc ScreenInfo::_StdCmapInfo
	///< \todo Somebody needs to understand and document this better.
	// x-ref trailing comment on InfoWindow above

	/**
	 * Various titlebar buttons that will be put in the window
	 * decorations for the screen.  This is setup by
	 * InitTitlebarButtons() and possibly added to via
	 * Left/RightTitleButton config vars.
	 * \sa CreateWindowTitlebarButtons() where this gets used to build
	 * the titlebar of an individual window.
	 */
	struct _TBInfo {
		int nleft;         ///< numbers of buttons on left side
		int nright;        ///< numbers of buttons on right side
		TitleButton *head; ///< start of list
		int border;        ///< button border
		int pad;           ///< button-padding
		int width;         ///< width of single button & border
		int leftx;         ///< start of left buttons
		int titlex;        ///< start of title
		int rightoff;      ///< offset back from right edge
		int titlew;        ///< width of title part
	} TBInfo; ///< \copydoc ScreenInfo::_TBInfo
	// x-ref trailing comment on InfoWindow above

	/**
	 * \defgroup scr_color_bits Various color definitions.
	 * These define various colors we use for things on the screen.
	 * They tend to come from things inside a Color {} section in the
	 * config.  There are often correspondences between the "simple"
	 * ColorPair or Pixel values (for the "normal" colors of each type)
	 * and a name_list (for per-window settings of that type).
	 * @{
	 */
	/// Border tile colors.  \sa ScreenInfo.BorderTileForegroundL
	/// \sa ScreenInfo.BorderTileBackgroundL
	ColorPair BorderTileC;

	/// Titlebar colors  \sa ScreenInfo.TitleForegroundL
	/// \sa ScreenInfo.TitleBackgroundL
	ColorPair TitleC;

	/// Menu colors
	ColorPair MenuC;

	/// Menu title colors
	ColorPair MenuTitleC;

	/// %Icon colors.  \sa ScreenInfo.IconForegroundL
	/// \sa ScreenInfo.IconBackgroundL
	ColorPair IconC;

	/// %Icon manager colors.  \sa ScreenInfo.IconManagerFL
	/// \sa ScreenInfo.IconManagerBL
	ColorPair IconManagerC;

	/// Default colors
	ColorPair DefaultC;

	/// Color of window borders.  \sa ScreenInfo.BorderColorL
	ColorPair BorderColorC;

	/// Specialized border colors for windows.  From BorderColor config
	/// var.  \sa ScreenInfo.BorderColorC
	name_list *BorderColorL;

	/// Specialized border colors for icons.  From IconBorderColor config
	/// var.  \sa ScreenInfo.IconBorderColor
	name_list *IconBorderColorL;

	/// Specialized border coloring.  From BorderTileForeground config
	/// var.  \sa ScreenInfo.BorderTileC
	name_list *BorderTileForegroundL;

	/// \copydoc ScreenInfo::BorderTileForegroundL
	name_list *BorderTileBackgroundL;

	/// Specialized titlebar foreground coloring.  From TitleForeground
	/// config var.  \sa ScreenInfo.TitleC
	name_list *TitleForegroundL;

	/// Specialized titlebar background coloring.  From TitleBackground
	/// config var.  \sa ScreenInfo.TitleC
	name_list *TitleBackgroundL;

	/// Specialized icon foreground coloring.  From IconForeground
	/// config var.  \sa ScreenInfo.IconC
	name_list *IconForegroundL;

	/// Specialized icon background coloring.  From IconBackground
	/// config var.  \sa ScreenInfo.IconC
	name_list *IconBackgroundL;

	/// Specialized icon manager foreground coloring.  From
	/// IconManagerForeground config var.  \sa ScreenInfo.IconManagerC
	name_list *IconManagerFL;

	/// Specialized icon manager background coloring.  From
	/// IconManagerBackground config var.  \sa ScreenInfo.IconManagerC
	name_list *IconManagerBL;

	/// Color to highlight focused windows in icon manager.
	/// \sa ScreenInfo.IconManagerHighlight
	name_list *IconManagerHighlightL;

	/// Menu shadow color
	Pixel MenuShadowColor;

	/// %Icon border color.  \sa ScreenInfo.IconBorderColorL
	Pixel IconBorderColor;

	/// %Icon manager highlight color.
	/// \sa ScreenInfo.IconManagerHighlightL
	Pixel IconManagerHighlight;

	/// The contrast of the clear shadow
	short ClearShadowContrast;

	/// The contrast of the dark shadow
	short DarkShadowContrast;
	/// @}

	/**
	 * \defgroup scr_icon_bits Various icon control bits.
	 * Various configurations for how icons get displayed and laid out.
	 * @{
	 */
	/// How icon images/titles are aligned.  From IconJustification
	/// config var.  X-ref IconRegion.TitleJustification.
	TitleJust IconJustification;

	/// How icons are laid out horizontally inside a region.  From
	/// IconRegionJustificationconfig var.
	IRJust IconRegionJustification;

	/// How icons are laid out vertically inside a region.  From
	/// IconRegionAlignement config var.
	IRAlignement IconRegionAlignement;

	/// How to animate window iconification, if any.  From IconifyStyle
	/// config var.
	IcStyle IconifyStyle;       /* ICONIFY_* */
	/// Limit on icon title size.  From MaxIconTitleWidth config var.
	int MaxIconTitleWidth;
#ifdef EWMH
	int PreferredIconWidth;     ///< Width from IconSize config var
	int PreferredIconHeight;    ///< Height from IconSize config var
#endif
	/// @}

	/// How title text is aligned in window titlebars.  From
	/// TitleJustification config var.  \note Despite the naming
	/// similarity, this is *not* related to
	/// IconRegion.TitleJustification.  That comes instead from
	/// ScreenInfo.IconJustification.
	TitleJust TitleJustification;

	/// \defgroup scr_cursors Various cursors used on the screen.
	/// These all come from the Cursors config var, or defaults.
	/// @{
	Cursor TitleCursor;    ///< title bar cursor
	Cursor FrameCursor;    ///< frame cursor
	Cursor IconCursor;     ///< icon cursor
	Cursor IconMgrCursor;  ///< icon manager cursor
	Cursor ButtonCursor;   ///< title bar button cursor
	Cursor MoveCursor;     ///< move cursor
	Cursor ResizeCursor;   ///< resize cursor
	Cursor WaitCursor;     ///< wait a while cursor
	Cursor MenuCursor;     ///< menu cursor
	Cursor SelectCursor;   ///< dot cursor for f.move, etc. from menus
	Cursor DestroyCursor;  ///< skull and cross bones, f.destroy
	Cursor AlterCursor;    ///< cursor for alternate keymaps
	/// @}

	/// Info about the WorkSpaceManager (and Occupy window) for the screen.
	WorkSpaceMgr workSpaceMgr;
	bool workSpaceManagerActive; ///< Whether the WSM is being shown

	/// \defgroup scr_vscreen_bits VScreen bits
	/// @{
	VirtualScreen *vScreenList;    ///< Linked list of per-VS info
	VirtualScreen *currentvs;      ///< Currently active VS
#ifdef VSCREEN
	name_list     *VirtualScreens; ///< List of defined VS's
	int           numVscreens;     ///< Number of defined VS's
#endif
	/// @}

	name_list   *OccupyAll;       ///< OccupyAll config var
	name_list   *UnmapByMovingFarAway; ///< UnmapByMovingFarAway config var
	name_list   *DontSetInactive; ///< DontSetInactive config var
	name_list   *AutoSqueeze;     ///< AutoSqueeze config var
	name_list   *StartSqueezed;   ///< StartSqueezed config var

	bool  use3Dmenus;        ///< UseThreeDMenus config var
	bool  use3Dtitles;       ///< UseThreeDTitles config var
	bool  use3Diconmanagers; ///< UseThreeDIconManagers config var
	bool  use3Dborders;      ///< UseThreeDBorders config var
	bool  use3Dwmap;         ///< UseThreeDWMap config var
	bool  SunkFocusWindowTitle;  ///< SunkFocusWindowTitle config var
	short WMgrVertButtonIndent;  ///< WMgrVertButtonIndent config var
	short WMgrHorizButtonIndent; ///< WMgrHorizButtonIndent config var
	short WMgrButtonShadowDepth; ///< WMgrButtonShadowDepth config var
	bool  BeNiceToColormap; ///< BeNiceToColormap config var
	bool  BorderCursors;    ///< BorderResizeCursors config var
	/// AutoPopup config flag.  \sa ScreenInfo.AutoPopupL
	bool  AutoPopup;
	short BorderShadowDepth;      ///< BorderShadowDepth config var
	short TitleButtonShadowDepth; ///< TitleButtonShadowDepth config var
	short TitleShadowDepth;       ///< TitleShadowDepth config var
	short MenuShadowDepth;        ///< MenuShadowDepth config var
	short IconManagerShadowDepth; ///< IconManagerShadowDepth config var
	/// ReallyMoveInWorkspaceManager config var
	bool  ReallyMoveInWorkspaceManager;
	/// AlwaysShowWindowWhenMovingFromWorkspaceManager config var
	bool  ShowWinWhenMovingInWmgr;
	bool  ReverseCurrentWorkspace; ///< ReverseCurrentWorkspace config var
	bool  DontWarpCursorInWMap;  ///< DontWarpCursorInWMap config var
	short XMoveGrid;             ///< XMoveGrid config var
	short YMoveGrid;             ///< YMoveGrid config var
	bool  CenterFeedbackWindow;  ///< CenterFeedbackWindow config var
	bool  ShrinkIconTitles;      ///< ShrinkIconTitles config var
	bool  AutoRaiseIcons;        ///< AutoRaiseIcons config var
	bool  AutoFocusToTransients; ///< AutoFocusToTransients config var
	bool  PackNewWindows;        ///< PackNewWindows config var

	/// Stash of various OTP info about the windows on the screen.  This
	/// is only used internally in various otp.c code; nothing else
	/// currently references it.
	struct OtpPreferences *OTP;
	/// Stash of OTP info about icons on the screen. \copydetails OTP
	struct OtpPreferences *IconOTP;
	/// Pointer to the start of the OTP winlists for the screen.
	struct OtpWinList *bottomOwl;

	/// From IconManagers config var.  This is a mapping from the window
	/// name pattern to the IconMgr structure it should go in.  All the
	/// IM's for the screen wind up in the iconmgr element.
	/// \sa ScreenInfo.iconmgr
	name_list *IconMgrs;

	/// AutoPopup config var (list).  Windows that popup when changed.
	/// \sa ScreenInfo.AutoPopup
	name_list *AutoPopupL;

	/// NoBorder config var.  Windows without borders.
	name_list *NoBorder;

	/// NoIconTitle config var (list).  Windows to not show a title on
	/// the icons for.  \sa ScreenInfo.NoIconTitlebar
	name_list *NoIconTitle;

	/// NoTitle config var (list).  Windows to not put a titlebar on.
	/// \sa ScreenInfo.NoTitlebar
	name_list *NoTitle;

	/// MakeTitle config var.  Windows to pup a titlebar on when general
	/// NoTitle is set.  \sa ScreenInfo.NoTitlebar \sa ScreenInfo.NoTitle
	name_list *MakeTitle;

	/// AutoRaise config var (list).  Windows to automatically raise when
	/// pointed to (possible after a delay).
	/// \sa ScreenInfo.AutoRaiseDefault \sa ScreenInfo.RaiseDelay
	name_list *AutoRaise;

	/// WarpOnDeIconify config var.  Windows to occupy over to current
	/// workspace on deiconification.  \note Minor nomenclature issue;
	/// 'Warp' in name suggests we move to the win, but it actually means
	/// move the win to us.
	name_list *WarpOnDeIconify;

	/// AutoLower config var (list).  Windows to automatically lower when
	/// pointed away from.  \sa ScreenInfo.AutoLowerDefault
	name_list *AutoLower;

	/// Icons config var.  Manually specified icons for particular
	/// windows.
	name_list *IconNames;

	/// NoHightlight config var (list).  Windows to not highlight border
	/// of when focused.  \sa ScreenInfo.Highlight
	name_list *NoHighlight;

	/// NoStackMode config var (list).  Windows to ignore
	/// application-initiated restacking requests from.
	/// \sa ScreenInfo.StackMode
	name_list *NoStackModeL;

	/// NoTitleHighlight config var (list).  Windows to not highlight in
	/// titlevar when focused.  \sa ScreenInfo.TitleHighlight
	name_list *NoTitleHighlight;

	/// DontIconifyByUnmapping config var.  Windows to iconify by making
	/// an icon for, overriding IconifyByUnmapping setting.
	name_list *DontIconify;

	/// IconManagerDontShow config var (list).
	/// \sa ScreenInfo.IconManagerDontShow
	name_list *IconMgrNoShow;

	/// IconManagerShow config var.  Windows to show in icon manager even
	/// if global IconManagerDontShow is set.
	name_list *IconMgrShow;

	/// IconifyByUnmapping config var (list).  \sa ScreenInfo.IconifyByUnmapping
	name_list *IconifyByUn;

	/// StartIconified config var.
	name_list *StartIconified;

	/// SqueezeTitle config var (list).  \sa ScreenInfo.SqueezeTitle
	name_list *SqueezeTitleL;

	/// DontSqueezeTitle config var (list).  \sa ScreenInfo.SqueezeTitle
	name_list *DontSqueezeTitleL;

	/// AlwaysSqueezeToGravity config var (list).
	/// \sa ScreenInfo.AlwaysSqueezeToGravity
	name_list *AlwaysSqueezeToGravityL;

	/// WindowRing config var (list).  Windows to put in warp ring.
	/// \sa ScreenInfo.WindowRingAll
	name_list *WindowRingL;

	/// WindowRingExclude config var.  Windows to exclude from warp ring.
	name_list *WindowRingExcludeL;

	/// WarpCursor config var (list).  Windows to warp to on deiconify.
	/// \sa ScreenInfo.WarpCursor
	name_list *WarpCursorL;

	/// DontSave config var.  Windows to not save info in session manager.
	name_list *DontSave;

	/// WindowGeometries config var.  Default geometries for windows.
	name_list *WindowGeometries;

	/// IgnoreTransient config var.  Windows that we should pretend
	/// aren't transient even if they are.
	name_list *IgnoreTransientL;

	/// OpaqueMove config var (list).  Windows to move opaquely rather
	/// than in outline.  \sa ScreenInfo.DoOpaqueMove
	name_list *OpaqueMoveList;

	/// NoOpaqueMove config var (list).  Windows to not move opaquely.
	/// \sa ScreenInfo.DoOpaqueMove
	name_list *NoOpaqueMoveList;

	/// OpaqueResize config var (list).  Windows to resize opaquely
	/// rather than in outline.  \sa ScreenInfo.DoOpaqueResize
	name_list *OpaqueResizeList;

	/// NoOpaqueResize config var (list).  Windows to not resize
	/// opaquely.  \sa ScreenInfo.DoOpaqueResize
	name_list *NoOpaqueResizeList;

	/// IconMenuDontShow config var.  Windows whose icons to not list in
	/// TwmIcons menu.
	name_list *IconMenuDontShow;


	/**
	 * \defgroup scr_gc_bits Various graphics contexts
	 * These are X Graphics Contexts, which are used for various sorts of
	 * drawing in X.  Stuff that needs to draw lines, or write out text,
	 * all needs to use a GC.  X-ref
	 * <https://www.x.org/releases/X11R7.7/doc/libX11/libX11/libX11.html#Graphics_Context_Functions>
	 * for upstream details.
	 * @{
	 */
	GC NormalGC; ///< normal GC for everything
	GC MenuGC;   ///< GC for menus
	GC DrawGC;   ///< GC to draw lines for move and resize
	GC BorderGC; ///< GC for drawing 3D borders
	GC rootGC;   ///< GC for internal pixmaps in image.c / image_bitmap.c
	/// @}

	Pixel Black; ///< Stash of "Black" X color for the screen
	Pixel White; ///< Stash of "White" X color for the screen
	unsigned long XORvalue;  ///< XorValue config var, or default

	/// \defgroup scr_font_bits Various font settings
	/// Definitions of various fonts to use on the Screen.
	/// @{
	MyFont TitleBarFont;     ///< TitleFont config var
	MyFont MenuFont;         ///< MenuFont config var
	MyFont IconFont;         ///< IconFont config var
	MyFont SizeFont;         ///< SizeFont config var
	MyFont IconManagerFont;  ///< IconManagerFont config var
	MyFont DefaultFont;      ///< Hardcoded fallback font
	/// @}

	/// Head of linked list of Screen's icon managers.  The head is also
	/// the default icon manager for the screen.  \sa ScreenInfo.IconMgrs
	IconMgr *iconmgr;

	/// Head of the list of IconRegion structs on the Screen.  Built out
	/// from %IconRegion config var.
	struct IconRegion *FirstRegion;

	/// Tail of the list of IconRegion structs on the Screen.  Used as an
	/// optimization in configuring the list on startup.  \todo Is this
	/// actually necessary?  Does the order matter?
	struct IconRegion *LastRegion;

	/// Pointer to head of list of window regions on screen.  Built from
	/// %WindowRegion config var.
	struct WindowRegion *FirstWindowRegion;

#ifdef WINBOX
	/// Pointer to head of list of windowboxes on screen.  Built from
	/// %WindowBox config var.
	WindowBox *FirstWindowBox;
#endif

	char *IconDirectory;    ///< IconDirectory config var
	char *PixmapDirectory;  ///< PixmapDirectory config var

	int SizeStringOffset;   ///< X offset in size window for drawing
	int SizeStringWidth;    ///< Minimum width of size window

	int BorderWidth;        ///< BorderWidth config var
	int BorderLeft;         ///< BorderLeft config var
	int BorderRight;        ///< BorderRight config var
	int BorderTop;          ///< BorderTop config var
	int BorderBottom;       ///< BorderBottom config var
	int ThreeDBorderWidth;  ///< ThreeDBorderWidth config var
	int IconBorderWidth;    ///< IconBorderWidth config var

	/// Height of the title bar window.  Calculated from font height and
	/// padding.  \todo Maybe this should be in ScreenInfo.TBInfo above?
	/// Same can be said for a number of following fields that are
	/// titlebar related...
	int TitleHeight;

	TwmWindow *Focus;    ///< The twm window that has focus.
	int EntryHeight;     ///< Menu entry height.  Calc'd from font height.

	/// FramePadding config var.  Distance between titlebar contents and
	/// frame.
	int FramePadding;
	/// TitlePadding config var.  Distance between items in titlebar.
	int TitlePadding;

	/// ButtonIndent config var.  Amount to shrink titlebar buttons.
	int ButtonIndent;
	int NumAutoRaises;   ///< Number of autoraise windows on screen
	int NumAutoLowers;   ///< Number of autolower windows on screen
	int TransientOnTop;  ///< TransientOnTop config var

	/// AutoRaise config flag.  \sa ScreenInfo.AutoRaise
	bool AutoRaiseDefault;

	/// AutoLower config flag.  \sa ScreenInfo.AutoLower
	bool AutoLowerDefault;

	bool NoDefaults;    ///< NoDefaults config var
	UsePPoss UsePPosition;     ///< UsePPosition config var
	bool UseSunkTitlePixmap;  ///< UseSunkTitlePixmap config var
	bool AutoRelativeResize;  ///< AutoRelativeResize config var

	/// Whether focus is allowed to move.  At one point this allegedly
	/// meant something like "is the input focus on the root?".  In
	/// current use, however, it's used as a flag for whether to
	/// auto-move focus to a new window; it's set to false in the
	/// ClickToFocus case, as well as when f.focus is called on a window,
	/// and then prevents Enter notifications from setting focus on new
	/// windows.
	/// \todo Rename to something better fitting.
	bool  FocusRoot;

	bool WarpCursor;    ///< WarpCursor config var.  \sa ScreenInfo.WarpCursorL
	bool ForceIcon;     ///< ForceIcons config var
	bool NoGrabServer;  ///< NoGrabServer config var
	bool NoRaiseMove;   ///< NoRaiseOnMove config var
	bool NoRaiseResize; ///< NoRaiseOnResize config var
	bool NoRaiseDeicon; ///< NoRaiseOnDeiconify config var
	bool RaiseOnWarp;   ///< NoRaiseOnWarp config var (inverse)
	bool DontMoveOff;   ///< DontMoveOff config var
	int MoveOffResistance;  ///< MoveOffResistence config var
	int MovePackResistance; ///< MovePackResistence config var

	/// Whether we're animating [de]iconification zooms.  From Zoom
	/// config var.  \sa ScreenInfo.ZoomCount
	bool DoZoom;

	bool TitleFocus;       ///< NoTitleFocus config var (inverse)
	bool IconManagerFocus; ///< NoIconManagerFocus config var (inverse)

	/// NoIconTitle config var.  \sa ScreenInfo.NoIconTitle
	bool NoIconTitlebar;

	/// NoTitle config var.  \sa ScreenInfo.NoTitle
	bool NoTitlebar;

	bool DecorateTransients; ///< DecorateTransients config var

	/// IconifyByUnmapping config var.  \sa ScreenInfo.IconifyByUn
	bool IconifyByUnmapping;

	bool ShowIconManager; ///< ShowIconManager config var
	bool ShowWorkspaceManager; ///< ShowWorkSpaceManager config var

	/// IconManagerDontShow config var.  \sa ScreenInfo.IconMgrNoShow
	bool IconManagerDontShow;

	bool AutoOccupy;   ///< AutoOccupy config var
	bool AutoPriority; ///< AutoPriority config var
	bool TransientHasOccupation; ///< TransientHasOccupation config var
	bool DontPaintRootWindow;    ///< DontPaintRootWindow config var
	bool BackingStore; ///< BackingStore config var
	bool SaveUnder;    ///< NoSaveUnders config var (inverse)
	RandPlac RandomPlacement;  ///< RandomPlacement config var (1st arg)
	short RandomDisplacementX; ///< RandomPlacement config var (2nd arg)
	short RandomDisplacementY; ///< RandomPlacement config var (2nd arg)

	/// Whether we're doing a window opaque move.  This is set at runtime
	/// for each particular move we start doing, acting as a "what are we
	/// in the middle of" flag.  It will get figured based on various
	/// things, like TwmWindow.OpaqueMove and
	/// ScreenInfo.OpaqueMoveThreshold.
	bool OpaqueMove;

	/// OpaqueMove config var.  \sa ScreenInfo.OpaqueMoveList
	bool DoOpaqueMove;

	unsigned short OpaqueMoveThreshold;  ///< OpaqueMoveThreshold config var

	/// OpaqueResize config var.  \sa ScreenInfo.OpaqueResizeList
	bool DoOpaqueResize;

	/// Whether we're in the midst of an opaque resizing.  Transiently
	/// set at runtime based on things like TwmWindow.OpaqueResize and
	/// ScreenInfo.OpaqueResizeThreshold.  X-ref ScreenInfo.OpaqueMove
	/// for its counterpart in the window-moving department.
	bool OpaqueResize;

	unsigned short OpaqueResizeThreshold; ///< OpaqueResizeThreshold config var

	/// NoHighlight config var (inverse).  \sa ScreenInfo.NoHighlight
	bool Highlight;

	/// NoStackMode config var (inverse).  \sa ScreenInfo.NoStackModeL
	bool StackMode;

	/// NoTitleHighlight config var (inverse).  \sa ScreenInfo.NoTitleHighlight
	bool TitleHighlight;

	/// MoveDelta config var.  Number of pixels before f.move starts
	short MoveDelta;

	/// Zoom config var.  Number of animated steps in [de]iconifying.
	short ZoomCount;

	bool SortIconMgr;  ///< SortIconManager config var
	bool Shadow;       ///< NoMenuShadows config var (inverse)
	bool InterpolateMenuColors;  ///< InterpolateMenuColors config var
	bool StayUpMenus;  ///< StayUpMenus config var
	bool WarpToDefaultMenuEntry; ///< WarpToDefaultMenuEntry config var
	bool ClickToFocus; ///< ClickToFocus config var
	bool SloppyFocus;  ///< SloppyFocus config var
	bool SaveWorkspaceFocus; ///< SaveWorkspaceFocus config var
	bool NoIconManagers;     ///< NoIconManagers config var
	bool ClientBorderWidth;  ///< ClientBorderWidth config var

	/// SqueezeTitle and/or DontSqueezeTitle config vars.
	/// \sa ScreenInfo.SqueezeTitleL  \sa ScreenInfo.DontSqueezeTitleL
	bool SqueezeTitle;

	/// AlwaysSqueezeToGravity config var.
	/// \sa ScreenInfo.AlwaysSqueezeToGravityL
	bool AlwaysSqueezeToGravity;

	/// Whether fonts have been loaded yet in the startup process
	bool HaveFonts;

	/// Some sort of attempt to determine whether this is the first
	/// config file we've parsed for this screen (which is bogus, since
	/// we only parse one file for each screen!), but also used in some
	/// color getting for obscure reasons.  This needs careful
	/// consideration and auditing; it may be just bogus.  X-ref work
	/// vtwm did in adjusting its use in GetColor() to avoid all the
	/// save/restore dances on calls around it, and the \#ifdef inside
	/// GetColor().  \todo Evaulate to determine whether it should exist.
	bool FirstTime;

	bool  CaseSensitive; ///< NoCaseSensitive config var (inverse)
	bool  WarpUnmapped;  ///< WarpUnmapped config var
	bool  WindowRingAll; ///< WindowRing config var.  \sa ScreenInfo.WindowRingL
	bool  WarpRingAnyWhere;       ///< WarpRingOnScreen config var (inverse)
	bool  ShortAllWindowsMenus;   ///< ShortAllWindowsMenus config var
	short OpenWindowTimeout;      ///< OpenWindowTimeout config var
	bool  RaiseWhenAutoUnSqueeze; ///< RaiseWhenAutoUnSqueeze config var
	bool  RaiseOnClick;           ///< RaiseOnClick config var
	short RaiseOnClickButton;     ///< RaiseOnClickButton config var
	unsigned int IgnoreModifier;  ///< IgnoreModifier config var
	bool IgnoreCaseInMenuSelection;  ///< IgnoreCaseInMenuSelection config var
	bool NoWarpToMenuTitle;          ///< NoWarpToMenuTitle config var
	bool NoImagesInWorkSpaceManager; ///< NoImagesInWorkSpaceManager config var

	/// DontToggleWorkspaceManagerState config var
	bool DontToggleWorkspaceManagerState;

	/// Whether to show the welcome window.  Related to the
	/// DontShowWelcomeWindow config var or the \--nowelcome command-line
	/// arg.  \ingroup scr_maskwin
	bool ShowWelcomeWindow;

	bool NameDecorations;  ///< DontNameDecorations config var (inverse)

	/// Whether to be strict about what encoding of window naming
	/// properties (WM_NAME etc) we accept.  From StrictWinNameEncoding
	/// config var.
	bool StrictWinNameEncoding;

	/// ForceFocus config var.  Forcing focus-setting on windows.
	/// \sa ScreenInfo.ForceFocusL
	bool      ForceFocus;
	/// \copybrief ForceFocus \sa ScreenInfo.ForceFocus
	name_list *ForceFocusL;

	FuncKey FuncKeyRoot;       ///< Key bindings
	FuncButton FuncButtonRoot; ///< Mouse click bindings

#ifdef EWMH
	/// Special-purpose window for WM_S<screennum> window selection.  See
	/// ICCCM sections 4.3, 2.8.
	Window icccm_Window;

	/// List of known client windows.  Stashed in _NET_CLIENT_LIST
	/// property.
	long *ewmh_CLIENT_LIST;
	int ewmh_CLIENT_LIST_size; ///< Allocated ScreenInfo.ewmh_CLIENT_LIST memory
	int ewmh_CLIENT_LIST_used; ///< Used ScreenInfo.ewmh_CLIENT_LIST slots

	/// List of EWMH struts.  From _NET_WM_STRUT properties.  EWMH config
	/// for windows that reserve spaces at the sides of a screen (e.g.,
	/// taskbars, panels, etc).
	EwmhStrut *ewmhStruts;

	name_list *EWMHIgnore; ///< EWMHIgnore config var.  Messages to ignore.
#endif /* EWMH */

	name_list *MWMIgnore; ///< Motif WM messages to ignore
};



/*
 * A few global vars that talk about Screen stuff
 */
extern int NumScreens;  ///< How many Screens are on our display
extern ScreenInfo **ScreenList; ///< List of ScreenInfo structs for each Screen
extern ScreenInfo *Scr; ///< The ScreenInfo struct for the current Screen


#endif /* _CTWM_SCREEN_H */