xprompt.h

#define CLASSNAME    "XPrompt"
#define PROGNAME     "xprompt"
#define INPUTSIZ     1024
#define DEFHEIGHT    20     /* default height for each text line */
#define DOUBLECLICK  250    /* time in miliseconds of a double click */
#define TEXTPART     7      /* completion word can be 1/7 of xprompt width */
#define MINTEXTWIDTH 200    /* minimum width of the completion word */
#define NLETTERS     'z' - 'a' + 1

/* macros */
#define LEN(x) (sizeof (x) / sizeof (x[0]))
#define MAX(x,y) ((x)>(y)?(x):(y))
#define MIN(x,y) ((x)<(y)?(x):(y))
#define BETWEEN(x, a, b)    ((a) <= (x) && (x) <= (b))
#define ISSOUTH(x) ((x) == SouthGravity || (x) == SouthWestGravity || (x) == SouthEastGravity)
#define ISMOTION(x) ((x) == CTRLBOL || (x) == CTRLEOL || (x) == CTRLLEFT \
                    || (x) == CTRLRIGHT || (x) == CTRLWLEFT || (x) == CTRLWRIGHT)
#define ISSELECTION(x) ((x) == CTRLSELBOL || (x) == CTRLSELEOL || (x) == CTRLSELLEFT \
                       || (x) == CTRLSELRIGHT || (x) == CTRLSELWLEFT || (x) == CTRLSELWRIGHT)
#define ISEDITING(x) ((x) == CTRLDELBOL || (x) == CTRLDELEOL || (x) == CTRLDELLEFT \
                     || (x) == CTRLDELRIGHT || (x) == CTRLDELWORD || (x) == INSERT)
#define ISUNDO(x) ((x) == CTRLUNDO || (x) == CTRLREDO)

enum {ColorFG, ColorBG, ColorCM, ColorLast};
enum {LowerCase, UpperCase, CaseLast};
enum Press_ret {DrawPrompt, DrawInput, Esc, Enter, Nop};

/* atoms */
enum {
	Utf8String,
	Clipboard,
	Targets,
	AtomLast
};

/* Input operations */
enum Ctrl {
	CTRLPASTE = 0,  /* Paste from clipboard */
	CTRLCOPY,       /* Copy into clipboard */
	CTRLENTER,      /* Choose item */
	CTRLPREV,       /* Select previous item */
	CTRLNEXT,       /* Select next item */
	CTRLPGUP,       /* Select item one screen above */
	CTRLPGDOWN,     /* Select item one screen below */
	CTRLUP,         /* Select previous item in the history */
	CTRLDOWN,       /* Select next item in the history */
	CTRLBOL,        /* Move cursor to beginning of line */
	CTRLEOL,        /* Move cursor to end of line */
	CTRLLEFT,       /* Move cursor one character to the left */
	CTRLRIGHT,      /* Move cursor one character to the right */
	CTRLWLEFT,      /* Move cursor one word to the left */
	CTRLWRIGHT,     /* Move cursor one word to the right */
	CTRLDELBOL,     /* Delete from cursor to beginning of line */
	CTRLDELEOL,     /* Delete from cursor to end of line */
	CTRLDELLEFT,    /* Delete character to left of cursor */
	CTRLDELRIGHT,   /* Delete character to right of cursor */
	CTRLDELWORD,    /* Delete from cursor to beginning of word */
	CTRLSELBOL,     /* Select from cursor to beginning of line */
	CTRLSELEOL,     /* Select from cursor to end of line */
	CTRLSELLEFT,    /* Select from cursor to one character to the left */
	CTRLSELRIGHT,   /* Select from cursor to one character to the right */
	CTRLSELWLEFT,   /* Select from cursor to one word to the left */
	CTRLSELWRIGHT,  /* Select from cursor to one word to the right */
	CTRLUNDO,       /* Undo */
	CTRLREDO,       /* Redo */
	CTRLCANCEL,     /* Cancel */
	CTRLNOTHING,    /* Control does nothing */
	INSERT          /* Insert character as is */
};

/* configuration structure */
struct Config {
	const char *worddelimiters;
	const char *xpromptctrl;
	const char *font;

	const char *background_color;
	const char *foreground_color;
	const char *description_color;
	const char *hoverbackground_color;
	const char *hoverforeground_color;
	const char *hoverdescription_color;
	const char *selbackground_color;
	const char *selforeground_color;
	const char *seldescription_color;
	const char *separator_color;
	const char *border_color;

	const char *geometryspec;
	const char *gravityspec;

	unsigned number_items;

	int border_pixels;
	int separator_pixels;

	const char *histfile;
	size_t histsize;

	int indent;
};

/* draw context structure */
struct DC {
	XftColor hover[ColorLast];      /* bg and fg of hovered item */
	XftColor normal[ColorLast];     /* bg and fg of normal text */
	XftColor selected[ColorLast];   /* bg and fg of the selected item */
	XftColor border;                /* color of the border */
	XftColor separator;             /* color of the separator */

	GC gc;                          /* graphics context */

	FcPattern *pattern;
	XftFont **fonts;
	size_t nfonts;

	int pad;                        /* padding around text */
};

/* input context structure */
struct IC {
	XIM xim;
	XIC xic;
	char *text;
	int caret;
	long eventmask;
	int composing;              /* whether user is composing text */
};

/* completion items */
struct Item {
	struct Item *prevmatch, *nextmatch; /* previous and next items */
	struct Item *prev, *next;           /* previous and next matched items */
	struct Item *parent;                /* parent item */
	struct Item *child;                 /* point to the list of child items */
	char *text;                         /* content of the completion item */
	char *description;                  /* description of the completion item */
};

/* monitor geometry structure */
struct Monitor {
	int num;                /* monitor number */
	int x, y, w, h;         /* monitor geometry */
};

/* undo list entry */
struct Undo {
	struct Undo *prev, *next;
	char *text;
};

/* prompt */
struct Prompt {
	const char *promptstr;      /* string appearing before the input field */
	unsigned promptw;           /* prompt width */

	char *text;                 /* input field */
	size_t textsize;            /* maximum size of the text in the input field */
	size_t cursor;              /* position of the cursor in the input field */
	size_t select;              /* position of the selection in the input field*/
	size_t file;                /* position of the beginning of the file name */

	struct Undo *undo;          /* undo list */
	struct Undo *undocurr;      /* current undo entry */

	struct Item *firstmatch;    /* first item that matches input */
	struct Item *matchlist;     /* first item that matches input to be listed */
	struct Item *selitem;       /* selected item */
	struct Item *hoveritem;     /* hovered item */
	struct Item **itemarray;    /* array containing nitems matching text */
	size_t nitems;              /* number of items in itemarray */
	size_t maxitems;            /* maximum number of items in itemarray */

	int gravity;                /* where in the screen to map xprompt */
	int x, y;                   /* position of xprompt */
	int w, h;                   /* width and height of xprompt */
	int descx;                  /* x position of the description field */
	int border;                 /* border width */
	int separator;              /* separator width */

	unsigned monitor;           /* monitor to draw the prompt in */

	Drawable pixmap;            /* where to draw shapes on */
	XftDraw *draw;              /* where to draw text on */
	Window win;                 /* xprompt window */
};

/* history */
struct History {
	FILE *fp;
	char **entries;     /* array of history entries */
	size_t index;       /* index to the selected entry in the array */
	size_t size;        /* how many entries there are in the array */
};