/* vi:set ts=8 sts=4 sw=4 noet:
 *
 * VIM - Vi IMproved		by Bram Moolenaar
 *				Motif support by Robert Webb
 *
 * Do ":help uganda"  in Vim to read copying and usage conditions.
 * Do ":help credits" in Vim to see a list of people who contributed.
 */

#ifdef FEAT_GUI_MOTIF
# include <Xm/Xm.h>
#endif

#ifdef FEAT_GUI_ATHENA
# include <X11/Intrinsic.h>
# include <X11/StringDefs.h>
#endif

#ifdef FEAT_GUI_GTK
# ifdef VMS /* undef MIN and MAX because Intrinsic.h redefines them anyway */
#  ifdef MAX
#   undef MAX
#  endif
#  ifdef MIN
#   undef MIN
#  endif
# endif
# include <X11/Intrinsic.h>
# include <gtk/gtk.h>
#endif

#ifdef FEAT_GUI_MAC
# include <Types.h>
/*# include <Memory.h>*/
# include <Quickdraw.h>
# include <Fonts.h>
# include <Events.h>
# include <Menus.h>
# if !(defined (TARGET_API_MAC_CARBON) && (TARGET_API_MAC_CARBON))
#  include <Windows.h>
# endif
# include <Controls.h>
/*# include <TextEdit.h>*/
# include <Dialogs.h>
# include <OSUtils.h>
/*
# include <ToolUtils.h>
# include <SegLoad.h>*/
#endif

#ifdef FEAT_GUI_PHOTON
# include <Ph.h>
# include <Pt.h>
# include "photon/PxProto.h"
#endif

/*
 * On some systems scrolling needs to be done right away instead of in the
 * main loop.
 */
#if defined(FEAT_GUI_MSWIN) || defined(FEAT_GUI_MAC) || defined(FEAT_GUI_GTK)
# define USE_ON_FLY_SCROLL
#endif

/*
 * GUIs that support dropping files on a running Vim.
 */
#if (defined(FEAT_DND) && defined(FEAT_GUI_GTK)) \
	|| defined(FEAT_GUI_MSWIN) \
	|| defined(FEAT_GUI_MAC)
# define HAVE_DROP_FILE
#endif

/*
 * This define makes menus always use a fontset.
 * We're not sure if this code always works, thus it can be disabled.
 */
#ifdef FEAT_XFONTSET
# define FONTSET_ALWAYS
#endif

/*
 * These macros convert between character row/column and pixel coordinates.
 * TEXT_X   - Convert character column into X pixel coord for drawing strings.
 * TEXT_Y   - Convert character row into Y pixel coord for drawing strings.
 * FILL_X   - Convert character column into X pixel coord for filling the area
 *		under the character.
 * FILL_Y   - Convert character row into Y pixel coord for filling the area
 *		under the character.
 * X_2_COL  - Convert X pixel coord into character column.
 * Y_2_ROW  - Convert Y pixel coord into character row.
 */
#ifdef FEAT_GUI_W32
# define TEXT_X(col)	((col) * gui.char_width)
# define TEXT_Y(row)	((row) * gui.char_height + gui.char_ascent)
# define FILL_X(col)	((col) * gui.char_width)
# define FILL_Y(row)	((row) * gui.char_height)
# define X_2_COL(x)	((x) / gui.char_width)
# define Y_2_ROW(y)	((y) / gui.char_height)
#else
# define TEXT_X(col)	((col) * gui.char_width  + gui.border_offset)
# define FILL_X(col)	((col) * gui.char_width  + gui.border_offset)
# define X_2_COL(x)	(((x) - gui.border_offset) / gui.char_width)
# define TEXT_Y(row)	((row) * gui.char_height + gui.char_ascent \
							+ gui.border_offset)
# define FILL_Y(row)	((row) * gui.char_height + gui.border_offset)
# define Y_2_ROW(y)	(((y) - gui.border_offset) / gui.char_height)
#endif

/* Indices for arrays of scrollbars */
#define SBAR_NONE	    -1
#define SBAR_LEFT	    0
#define SBAR_RIGHT	    1
#define SBAR_BOTTOM	    2

/* Orientations for scrollbars */
#define SBAR_VERT	    0
#define SBAR_HORIZ	    1

/* Default size of scrollbar */
#define SB_DEFAULT_WIDTH    16

/* Default height of the menu bar */
#define MENU_DEFAULT_HEIGHT 1		/* figure it out at runtime */

/* Flags for gui_mch_outstr_nowrap() */
#define GUI_MON_WRAP_CURSOR	0x01	/* wrap cursor at end of line */
#define GUI_MON_INVERT		0x02	/* invert the characters */
#define GUI_MON_IS_CURSOR	0x04	/* drawing cursor */
#define GUI_MON_TRS_CURSOR	0x08	/* drawing transparent cursor */
#define GUI_MON_NOCLEAR		0x10	/* don't clear selection */

/* Flags for gui_mch_draw_string() */
#define DRAW_TRANSP		0x01	/* draw with transparent bg */
#define DRAW_BOLD		0x02	/* draw bold text */
#define DRAW_UNDERL		0x04	/* draw underline text */
#define DRAW_UNDERC		0x08	/* draw undercurl text */
#if defined(FEAT_GUI_GTK)
# define DRAW_ITALIC		0x10	/* draw italic text */
#endif
#define DRAW_CURSOR		0x20	/* drawing block cursor (win32) */
#define DRAW_STRIKE		0x40	/* strikethrough */

/* For our own tearoff menu item */
#define TEAR_STRING		"-->Detach"
#define TEAR_LEN		(9)	/* length of above string */

/* for the toolbar */
#define TOOLBAR_BUTTON_HEIGHT	18
#define TOOLBAR_BUTTON_WIDTH	18
#define TOOLBAR_BORDER_HEIGHT	12  /* room above+below buttons for MSWindows */

#ifdef FEAT_GUI_MSWIN
# define TABLINE_HEIGHT 22
#endif
#ifdef FEAT_GUI_MOTIF
# define TABLINE_HEIGHT 30
#endif

#if defined(NO_CONSOLE) || defined(FEAT_GUI_GTK) || defined(FEAT_GUI_X11)
# define NO_CONSOLE_INPUT	/* use no_console_input() to check if there
				   is no console input possible */
#endif

typedef struct GuiScrollbar
{
    long	ident;		/* Unique identifier for each scrollbar */
    win_T	*wp;		/* Scrollbar's window, NULL for bottom */
    int		type;		/* one of SBAR_{LEFT,RIGHT,BOTTOM} */
    long	value;		/* Represents top line number visible */
#ifdef FEAT_GUI_ATHENA
    int		pixval;		/* pixel count of value */
#endif
    long	size;		/* Size of scrollbar thumb */
    long	max;		/* Number of lines in buffer */

    /* Values measured in characters: */
    int		top;		/* Top of scroll bar (chars from row 0) */
    int		height;		/* Current height of scroll bar in rows */
    int		width;		/* Current width of scroll bar in cols */
    int		status_height;	/* Height of status line */
#ifdef FEAT_GUI_X11
    Widget	id;		/* Id of real scroll bar */
#endif
#ifdef FEAT_GUI_GTK
    GtkWidget *id;		/* Id of real scroll bar */
    unsigned long handler_id;   /* Id of "value_changed" signal handler */
#endif

#ifdef FEAT_GUI_MSWIN
    HWND	id;		/* Id of real scroll bar */
    int		scroll_shift;	/* The scrollbar stuff can handle only up to
				   32767 lines.  When the file is longer,
				   scroll_shift is set to the number of shifts
				   to reduce the count.  */
#endif
#ifdef FEAT_GUI_MAC
    ControlHandle id;		/* A handle to the scrollbar */
#endif
#ifdef FEAT_GUI_PHOTON
    PtWidget_t	*id;
#endif
} scrollbar_T;

typedef long	    guicolor_T;	/* handle for a GUI color; for X11 this should
				   be "Pixel", but that's an unsigned and we
				   need a signed value */
#define INVALCOLOR (guicolor_T)-11111	/* number for invalid color; on 32 bit
				   displays there is a tiny chance this is an
				   actual color */
#define CTERMCOLOR (guicolor_T)-11110	/* only used for cterm.bg_rgb and
					   cterm.fg_rgb: use cterm color */

#ifdef FEAT_GUI_GTK
  typedef PangoFontDescription	*GuiFont;       /* handle for a GUI font */
  typedef PangoFontDescription  *GuiFontset;    /* handle for a GUI fontset */
# define NOFONT		(GuiFont)NULL
# define NOFONTSET	(GuiFontset)NULL
#else
# ifdef FEAT_GUI_PHOTON
  typedef char		*GuiFont;
  typedef char		*GuiFontset;
#  define NOFONT	(GuiFont)NULL
#  define NOFONTSET	(GuiFontset)NULL
# else
#  ifdef FEAT_GUI_X11
  typedef XFontStruct	*GuiFont;	/* handle for a GUI font */
  typedef XFontSet	GuiFontset;	/* handle for a GUI fontset */
#   define NOFONT	(GuiFont)0
#   define NOFONTSET	(GuiFontset)0
#  else
  typedef long_u	GuiFont;	/* handle for a GUI font */
  typedef long_u	GuiFontset;	/* handle for a GUI fontset */
#   define NOFONT	(GuiFont)0
#   define NOFONTSET	(GuiFontset)0
#  endif
# endif
#endif

typedef struct Gui
{
    int		in_focus;	    /* Vim has input focus */
    int		in_use;		    /* Is the GUI being used? */
    int		starting;	    /* GUI will start in a little while */
    int		shell_created;	    /* Has the shell been created yet? */
    int		dying;		    /* Is vim dying? Then output to terminal */
    int		dofork;		    /* Use fork() when GUI is starting */
    int		dragged_sb;	    /* Which scrollbar being dragged, if any? */
    win_T	*dragged_wp;	    /* Which WIN's sb being dragged, if any? */
    int		pointer_hidden;	    /* Is the mouse pointer hidden? */
    int		col;		    /* Current cursor column in GUI display */
    int		row;		    /* Current cursor row in GUI display */
    int		cursor_col;	    /* Physical cursor column in GUI display */
    int		cursor_row;	    /* Physical cursor row in GUI display */
    char	cursor_is_valid;    /* There is a cursor at cursor_row/col */
    int		num_cols;	    /* Number of columns */
    int		num_rows;	    /* Number of rows */
    int		scroll_region_top;  /* Top (first) line of scroll region */
    int		scroll_region_bot;  /* Bottom (last) line of scroll region */
    int		scroll_region_left;  /* Left (first) column of scroll region */
    int		scroll_region_right;  /* Right (last) col. of scroll region */
    int		highlight_mask;	    /* Highlight attribute mask */
    int		scrollbar_width;    /* Width of vertical scrollbars */
    int		scrollbar_height;   /* Height of horizontal scrollbar */
    int		left_sbar_x;	    /* Calculated x coord for left scrollbar */
    int		right_sbar_x;	    /* Calculated x coord for right scrollbar */

#ifdef FEAT_MENU
# ifndef FEAT_GUI_GTK
    int		menu_height;	    /* Height of the menu bar */
    int		menu_width;	    /* Width of the menu bar */
# endif
    char	menu_is_active;	    /* TRUE if menu is present */
# ifdef FEAT_GUI_ATHENA
    char	menu_height_fixed;  /* TRUE if menu height fixed */
# endif
#endif

    scrollbar_T bottom_sbar;	    /* Bottom scrollbar */
    int		which_scrollbars[3];/* Which scrollbar boxes are active? */
    int		prev_wrap;	    /* For updating the horizontal scrollbar */
    int		char_width;	    /* Width of char cell in pixels */
    int		char_height;	    /* Height of char cell in pixels, includes
				       'linespace' */
    int		char_ascent;	    /* Ascent of char in pixels */
    int		border_width;	    /* Width of our border around text area */
    int		border_offset;	    /* Total pixel offset for all borders */

    GuiFont	norm_font;	    /* Normal font */
#ifndef FEAT_GUI_GTK
    GuiFont	bold_font;	    /* Bold font */
    GuiFont	ital_font;	    /* Italic font */
    GuiFont	boldital_font;	    /* Bold-Italic font */
#else
    int		font_can_bold;	    /* Whether norm_font supports bold weight.
				     * The styled font variants are not used. */
#endif

#if defined(FEAT_MENU) && !defined(FEAT_GUI_GTK)
# ifdef FONTSET_ALWAYS
    GuiFontset	menu_fontset;	    /* set of fonts for multi-byte chars */
# else
    GuiFont	menu_font;	    /* menu item font */
# endif
#endif
    GuiFont	wide_font;	    /* Normal 'guifontwide' font */
#ifndef FEAT_GUI_GTK
    GuiFont	wide_bold_font;	    /* Bold 'guifontwide' font */
    GuiFont	wide_ital_font;	    /* Italic 'guifontwide' font */
    GuiFont	wide_boldital_font; /* Bold-Italic 'guifontwide' font */
#endif
#ifdef FEAT_XFONTSET
    GuiFontset	fontset;	    /* set of fonts for multi-byte chars */
#endif
    guicolor_T	back_pixel;	    /* Color of background */
    guicolor_T	norm_pixel;	    /* Color of normal text */
    guicolor_T	def_back_pixel;	    /* default Color of background */
    guicolor_T	def_norm_pixel;	    /* default Color of normal text */

#ifdef FEAT_GUI_X11
    char	*rsrc_menu_fg_name;	/* Color of menu & dialog foreground */
    guicolor_T	menu_fg_pixel;		/* Same in Pixel format */
    char	*rsrc_menu_bg_name;	/* Color of menu & dialog background */
    guicolor_T	menu_bg_pixel;		/* Same in Pixel format */
    char	*rsrc_scroll_fg_name;	/* Color of scrollbar foreground */
    guicolor_T	scroll_fg_pixel;	/* Same in Pixel format */
    char	*rsrc_scroll_bg_name;	/* Color of scrollbar background */
    guicolor_T	scroll_bg_pixel;	/* Same in Pixel format */

# ifdef FEAT_GUI_MOTIF
    guicolor_T	menu_def_fg_pixel;  /* Default menu foreground */
    guicolor_T	menu_def_bg_pixel;  /* Default menu background */
    guicolor_T	scroll_def_fg_pixel;  /* Default scrollbar foreground */
    guicolor_T	scroll_def_bg_pixel;  /* Default scrollbar background */
# endif
    Display	*dpy;		    /* X display */
    Window	wid;		    /* Window id of text area */
    int		visibility;	    /* Is shell partially/fully obscured? */
    GC		text_gc;
    GC		back_gc;
    GC		invert_gc;
    Cursor	blank_pointer;	    /* Blank pointer */

    /* X Resources */
    char_u	*rsrc_font_name;    /* Resource font name, used if 'guifont'
				       not set */
    char_u	*rsrc_bold_font_name; /* Resource bold font name */
    char_u	*rsrc_ital_font_name; /* Resource italic font name */
    char_u	*rsrc_boldital_font_name;  /* Resource bold-italic font name */
    char_u	*rsrc_menu_font_name;    /* Resource menu Font name */
    Bool	rsrc_rev_video;	    /* Use reverse video? */

    char_u	*geom;		    /* Geometry, eg "80x24" */
    Bool	color_approx;	    /* Some color was approximated */
#endif

#ifdef FEAT_GUI_GTK
# ifndef USE_GTK3
    int		visibility;	    /* Is shell partially/fully obscured? */
# endif
    GdkCursor	*blank_pointer;	    /* Blank pointer */

    /* X Resources */
    char_u	*geom;		    /* Geometry, eg "80x24" */

    GtkWidget	*mainwin;	    /* top level GTK window */
    GtkWidget	*formwin;	    /* manages all the windows below */
    GtkWidget	*drawarea;	    /* the "text" area */
# ifdef FEAT_MENU
    GtkWidget	*menubar;	    /* menubar */
# endif
# ifdef FEAT_TOOLBAR
    GtkWidget	*toolbar;	    /* toolbar */
# endif
# ifdef FEAT_GUI_GNOME
    GtkWidget	*menubar_h;	    /* menubar handle */
    GtkWidget	*toolbar_h;	    /* toolbar handle */
# endif
# ifdef USE_GTK3
    GdkRGBA	*fgcolor;	    /* GDK-styled foreground color */
    GdkRGBA	*bgcolor;	    /* GDK-styled background color */
    GdkRGBA	*spcolor;	    /* GDK-styled special color */
# else
    GdkColor	*fgcolor;	    /* GDK-styled foreground color */
    GdkColor	*bgcolor;	    /* GDK-styled background color */
    GdkColor	*spcolor;	    /* GDK-styled special color */
# endif
# ifdef USE_GTK3
    cairo_surface_t *surface;       /* drawarea surface */
    gboolean	     by_signal;     /* cause of draw operation */
# else
    GdkGC	*text_gc;	    /* cached GC for normal text */
# endif
    PangoContext     *text_context; /* the context used for all text */
    PangoFont	     *ascii_font;   /* cached font for ASCII strings */
    PangoGlyphString *ascii_glyphs; /* cached code point -> glyph map */
# ifdef FEAT_GUI_TABLINE
    GtkWidget	*tabline;	    /* tab pages line handle */
# endif

    GtkAccelGroup *accel_group;
    GtkWidget	*filedlg;	    /* file selection dialog */
    char_u	*browse_fname;	    /* file name from filedlg */

    guint32	event_time;
#endif	/* FEAT_GUI_GTK */

#if defined(FEAT_GUI_TABLINE) \
	&& (defined(FEAT_GUI_W32) || defined(FEAT_GUI_MOTIF) \
		|| defined(FEAT_GUI_MAC))
    int		tabline_height;
#endif

#ifdef FEAT_FOOTER
    int		footer_height;	    /* height of the message footer */
#endif

#if defined(FEAT_TOOLBAR) \
	&& (defined(FEAT_GUI_ATHENA) || defined(FEAT_GUI_MOTIF))
    int		toolbar_height;	    /* height of the toolbar */
#endif

#ifdef FEAT_BEVAL_TIP
    /* Tooltip properties; also used for balloon evaluation */
    char_u	*rsrc_tooltip_font_name; /* tooltip font name */
    char	*rsrc_tooltip_fg_name;	/* tooltip foreground color name */
    char	*rsrc_tooltip_bg_name;	/* tooltip background color name */
    guicolor_T	tooltip_fg_pixel;	/* tooltip foreground color */
    guicolor_T	tooltip_bg_pixel;	/* tooltip background color */
    XFontSet	tooltip_fontset;	/* tooltip fontset */
#endif

#ifdef FEAT_GUI_MSWIN
    GuiFont	currFont;	    /* Current font */
    guicolor_T	currFgColor;	    /* Current foreground text color */
    guicolor_T	currBgColor;	    /* Current background text color */
    guicolor_T	currSpColor;	    /* Current special text color */
#endif

#ifdef FEAT_GUI_MAC
    WindowPtr	VimWindow;
    MenuHandle	MacOSHelpMenu;	    /* Help menu provided by the MacOS */
    int		MacOSHelpItems;	    /* Nr of help-items supplied by MacOS */
    WindowPtr	wid;		    /* Window id of text area */
    int		visibility;	    /* Is window partially/fully obscured? */
#endif

#ifdef FEAT_GUI_PHOTON
    PtWidget_t	*vimWindow;		/* PtWindow */
    PtWidget_t	*vimTextArea;		/* PtRaw */
    PtWidget_t	*vimContainer;		/* PtPanel */
# if defined(FEAT_MENU) || defined(FEAT_TOOLBAR)
    PtWidget_t	*vimToolBarGroup;
# endif
# ifdef FEAT_MENU
    PtWidget_t	*vimMenuBar;
# endif
# ifdef FEAT_TOOLBAR
    PtWidget_t	*vimToolBar;
    int		toolbar_height;
# endif
    PhEvent_t	*event_buffer;
#endif

#ifdef FEAT_XIM
    char	*rsrc_input_method;
    char	*rsrc_preedit_type_name;
#endif
} gui_T;

extern gui_T gui;			/* this is defined in gui.c */

/* definitions of available window positionings for gui_*_position_in_parent()
 */
typedef enum
{
    VW_POS_MOUSE,
    VW_POS_CENTER,
    VW_POS_TOP_CENTER
} gui_win_pos_T;

#ifdef FIND_REPLACE_DIALOG
/*
 * Flags used to distinguish the different contexts in which the
 * find/replace callback may be called.
 */
# define FRD_FINDNEXT	1	/* Find next in find dialog */
# define FRD_R_FINDNEXT	2	/* Find next in repl dialog */
# define FRD_REPLACE	3	/* Replace once */
# define FRD_REPLACEALL	4	/* Replace remaining matches */
# define FRD_UNDO	5	/* Undo replaced text */
# define FRD_TYPE_MASK   7	/* Mask for the callback type */
/* Flags which change the way searching is done. */
# define FRD_WHOLE_WORD	0x08	/* match whole word only */
# define FRD_MATCH_CASE	0x10	/* match case */
#endif

#ifdef FEAT_GUI_GTK
/*
 * Convenience macros to convert from 'encoding' to 'termencoding' and
 * vice versa.	If no conversion is necessary the passed-in pointer is
 * returned as is, without allocating any memory.  Thus additional _FREE()
 * macros are provided.  The _FREE() macros also set the pointer to NULL,
 * in order to avoid bugs due to illegal memory access only happening if
 * 'encoding' != utf-8...
 *
 * Defining these macros as pure expressions looks a bit tricky but
 * avoids depending on the context of the macro expansion.  One of the
 * rare occasions where the comma operator comes in handy :)
 *
 * Note: Do NOT keep the result around when handling control back to
 * the main Vim!  The user could change 'encoding' at any time.
 */
# define CONVERT_TO_UTF8(String)				\
    ((output_conv.vc_type == CONV_NONE || (String) == NULL)	\
	    ? (String)						\
	    : string_convert(&output_conv, (String), NULL))

# define CONVERT_TO_UTF8_FREE(String)				\
    ((String) = ((output_conv.vc_type == CONV_NONE)		\
			? (char_u *)NULL			\
			: (vim_free(String), (char_u *)NULL)))

# define CONVERT_FROM_UTF8(String)				\
    ((input_conv.vc_type == CONV_NONE || (String) == NULL)	\
	    ? (String)						\
	    : string_convert(&input_conv, (String), NULL))

# define CONVERT_FROM_UTF8_FREE(String)				\
    ((String) = ((input_conv.vc_type == CONV_NONE)		\
			? (char_u *)NULL			\
			: (vim_free(String), (char_u *)NULL)))

#else
# define CONVERT_TO_UTF8(String) (String)
# define CONVERT_TO_UTF8_FREE(String) ((String) = (char_u *)NULL)
# define CONVERT_FROM_UTF8(String) (String)
# define CONVERT_FROM_UTF8_FREE(String) ((String) = (char_u *)NULL)
#endif /* FEAT_GUI_GTK */

#ifdef FEAT_GUI_GTK
/*
 * The second parameter of g_signal_handlers_disconnect_by_func() is supposed
 * to be a function pointer which was passed to g_signal_connect_*() somewhere
 * previously, and hence it must be of type GCallback, i.e., void (*)(void).
 *
 * Meanwhile, g_signal_handlers_disconnect_by_func() is a macro calling
 * g_signal_handlers_disconnect_matched(), and the second parameter of the
 * former is to be passed to the sixth parameter of the latter the type of
 * which, however, is declared as void * in the function signature.
 *
 * While the ISO C Standard does not require that function pointers be
 * interconvertible to void *, widely-used compilers such as gcc and clang
 * do such conversion implicitly and automatically on some platforms without
 * issuing any warning.
 *
 * For Solaris Studio, that is not the case.  An explicit type cast is needed
 * to suppress warnings on that particular conversion.
 */
# if defined(__SUNPRO_C) && defined(USE_GTK3)
#  define FUNC2GENERIC(func) (void *)(func)
# else
#  define FUNC2GENERIC(func) G_CALLBACK(func)
# endif
#endif /* FEAT_GUI_GTK */

#if defined(UNIX) && !defined(FEAT_GUI_MAC)
# define GUI_MAY_FORK
#endif