/*
   Best viewed with GNU Emacs 19

   wmgeneral was taken from wmppp.

   It has a lot of routines which most of the wm* programs use.

   ------------------------------------------------------------

   Author: Martijn Pieterse (pieterse@xs4all.nl)

   ---
   CHANGES:
   ---


   14/09/1998 (Dave Clark, clarkd@skyia.com)
   * Updated createXBMfromXPM routine
   * Now supports >256 colors
   11/09/1998 (Martijn Pieterse, pieterse@xs4all.nl)
   * Removed a bug from parse_rcfile. You could
   not use "start" in a command if a label was
   also start.
   * Changed the needed geometry string.
   We don't use window size, and don't support
   negative positions.
   03/09/1998 (Martijn Pieterse, pieterse@xs4all.nl)
   * Added parse_rcfile2
   02/09/1998 (Martijn Pieterse, pieterse@xs4all.nl)
   * Added -geometry support (untested)
   28/08/1998 (Martijn Pieterse, pieterse@xs4all.nl)
   * Added createXBMfromXPM routine
   * Saves a lot of work with changing xpm's.
   02/05/1998 (Martijn Pieterse, pieterse@xs4all.nl)
   * changed the read_rc_file to parse_rcfile, as suggested by Marcelo E. Magallon
   * debugged the parse_rc file.
   30/04/1998 (Martijn Pieterse, pieterse@xs4all.nl)
   * Ripped similar code from all the wm* programs,
   and put them in a single file.

 */

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <ctype.h>
#include <stdarg.h>

#include <X11/Xlib.h>
#include <X11/xpm.h>
#include <X11/extensions/shape.h>

#include "wmgeneral.h"
#include "charset.xpm"

/*****************/
 /* X11 Variables */
/*****************/

int screen;
int x_fd;
int d_depth;
XSizeHints mysizehints;
XWMHints mywmhints;
Pixel back_pix, fore_pix;
char *Geometry = "";
GC NormalGC;
Pixmap pixmask;

/*****************/
 /* Mouse Regions */
/*****************/

typedef struct {
	int enable;
	int top;
	int bottom;
	int left;
	int right;
} MOUSE_REGION;

MOUSE_REGION mouse_region[MAX_MOUSE_REGION];

/***********************/
 /* Function Prototypes */
/***********************/

static void GetXPM(XpmIcon *, char **);
static Pixel GetColor(char *);
void RedrawWindow(void);
void AddMouseRegion(int, int, int, int, int);
int CheckMouseRegion(int, int);
void PutPixel(int, int, int);
int GetPixel(int, int);

/*******************************************************************************\
|* parse_rcfile																   *|
\*******************************************************************************/

void parse_rcfile(const char *filename, rckeys * keys)
{

	char *p, *q;
	char temp[128];
	char *tokens = " :\t\n";
	FILE *fp;
	int i, key;

	fp = fopen(filename, "r");
	if (fp) {
		while (fgets(temp, 128, fp)) {
			key = 0;
			q = strdup(temp);
			q = strtok(q, tokens);
			while (key >= 0 && keys[key].label) {
				if ((!strcmp(q, keys[key].label))) {
					p = strstr(temp, keys[key].label);
					p += strlen(keys[key].label);
					p += strspn(p, tokens);
					if ((i = strcspn(p, "#\n")))
						p[i] = 0;
					free(*keys[key].var);
					*keys[key].var = strdup(p);
					key = -1;
				} else
					key++;
			}
			free(q);
		}
		fclose(fp);
	}
}

/*******************************************************************************\
|* parse_rcfile2															   *|
\*******************************************************************************/

void parse_rcfile2(const char *filename, rckeys2 * keys)
{

	char *p;
	char temp[128];
	char *tokens = " :\t\n";
	FILE *fp;
	int i, key;
	char *family = NULL;

	fp = fopen(filename, "r");
	if (fp) {
		while (fgets(temp, 128, fp)) {
			key = 0;
			while (key >= 0 && keys[key].label) {
				if ((p = strstr(temp, keys[key].label))) {
					p += strlen(keys[key].label);
					p += strspn(p, tokens);
					if ((i = strcspn(p, "#\n")))
						p[i] = 0;
					free(*keys[key].var);
					*keys[key].var = strdup(p);
					key = -1;
				} else
					key++;
			}
		}
		fclose(fp);
	}
	free(family);
}


/*******************************************************************************\
|* GetXPM																	   *|
\*******************************************************************************/

static void GetXPM(XpmIcon * wmgen, char *pixmap_bytes[])
{

	XWindowAttributes attributes;
	int err;

	/* For the colormap */
	XGetWindowAttributes(display, Root, &attributes);

	wmgen->attributes.valuemask |= (XpmReturnPixels | XpmReturnExtensions);

	err = XpmCreatePixmapFromData(display, Root, pixmap_bytes, &(wmgen->pixmap),
				   &(wmgen->mask), &(wmgen->attributes));

	if (err != XpmSuccess) {
		fprintf(stderr, "Not enough free colorcells.\n");
		exit(1);
	}
}

/*******************************************************************************\
|* GetColor																	   *|
\*******************************************************************************/

static Pixel GetColor(char *name)
{

	XColor color;
	XWindowAttributes attributes;

	XGetWindowAttributes(display, Root, &attributes);

	color.pixel = 0;
	if (!XParseColor(display, attributes.colormap, name, &color)) {
		fprintf(stderr, "wm.app: can't parse %s.\n", name);
	} else if (!XAllocColor(display, attributes.colormap, &color)) {
		fprintf(stderr, "wm.app: can't allocate %s.\n", name);
	}
	return color.pixel;
}

/*******************************************************************************\
|* flush_expose																   *|
\*******************************************************************************/

static int flush_expose(Window w)
{

	XEvent dummy;
	int i = 0;

	while (XCheckTypedWindowEvent(display, w, Expose, &dummy))
		i++;

	return i;
}

/*******************************************************************************\
|* RedrawWindow																   *|
\*******************************************************************************/

void RedrawWindow(void)
{

	flush_expose(iconwin);
	XCopyArea(display, wmgen.pixmap, iconwin, NormalGC,
	    0, 0, wmgen.attributes.width, wmgen.attributes.height, 0, 0);
	flush_expose(win);
	XCopyArea(display, wmgen.pixmap, win, NormalGC,
	    0, 0, wmgen.attributes.width, wmgen.attributes.height, 0, 0);
}

/*******************************************************************************\
|* RedrawWindowXY															   *|
\*******************************************************************************/

void RedrawWindowXY(int x, int y)
{

	flush_expose(iconwin);
	XCopyArea(display, wmgen.pixmap, iconwin, NormalGC,
	    x, y, wmgen.attributes.width, wmgen.attributes.height, 0, 0);
	flush_expose(win);
	XCopyArea(display, wmgen.pixmap, win, NormalGC,
	    x, y, wmgen.attributes.width, wmgen.attributes.height, 0, 0);
}

/*******************************************************************************\
|* AddMouseRegion															   *|
\*******************************************************************************/

void AddMouseRegion(int index, int left, int top, int right, int bottom)
{

	if (index < MAX_MOUSE_REGION) {
		mouse_region[index].enable = 1;
		mouse_region[index].top = top;
		mouse_region[index].left = left;
		mouse_region[index].bottom = bottom;
		mouse_region[index].right = right;
	}
}

/*******************************************************************************\
|* CheckMouseRegion															   *|
\*******************************************************************************/

int CheckMouseRegion(int x, int y)
{

	int i;
	int found;

	found = 0;

	for (i = 0; i < MAX_MOUSE_REGION && !found; i++) {
		if (mouse_region[i].enable &&
		    x <= mouse_region[i].right &&
		    x >= mouse_region[i].left &&
		    y <= mouse_region[i].bottom &&
		    y >= mouse_region[i].top)
			found = 1;
	}
	if (!found)
		return -1;
	return (i - 1);
}

/***************************************************************************\
|* createXBMfromXPM							   *|
\***************************************************************************/
void createXBMfromXPM(char *xbm, char **xpm, int sx, int sy)
{

	int i, j, k;
	int width, height, numcol, depth;
	int zero = 0;
	unsigned char bwrite;
	int bcount;
	int curpixel;

	sscanf(*xpm, "%d %d %d %d", &width, &height, &numcol, &depth);


	for (k = 0; k != depth; k++) {
		zero <<= 8;
		zero |= xpm[1][k];
	}

	for (i = numcol + 1; i < numcol + sy + 1; i++) {
		bcount = 0;
		bwrite = 0;
		for (j = 0; j < sx * depth; j += depth) {
			bwrite >>= 1;

			curpixel = 0;
			for (k = 0; k != depth; k++) {
				curpixel <<= 8;
				curpixel |= xpm[i][j + k];
			}

			if (curpixel != zero) {
				bwrite += 128;
			}
			bcount++;
			if (bcount == 8) {
				*xbm = bwrite;
				xbm++;
				bcount = 0;
				bwrite = 0;
			}
		}
	}
}

/*******************************************************************************\
|* copyXPMArea																   *|
\*******************************************************************************/

void copyXPMArea(int x, int y, int sx, int sy, int dx, int dy)
{

	XCopyArea(display, wmgen.pixmap, wmgen.pixmap, NormalGC, x, y, sx, sy, dx, dy);

}

/*******************************************************************************\
|* copyXBMArea																   *|
\*******************************************************************************/

void copyXBMArea(int x, int y, int sx, int sy, int dx, int dy)
{

	XCopyArea(display, wmgen.mask, wmgen.pixmap, NormalGC, x, y, sx, sy, dx, dy);
}


/*******************************************************************************\
|* setMaskXY																   *|
\*******************************************************************************/

void setMaskXY(int x, int y)
{

	XShapeCombineMask(display, win, ShapeBounding, x, y, pixmask, ShapeSet);
	XShapeCombineMask(display, iconwin, ShapeBounding, x, y, pixmask, ShapeSet);
}

/*******************************************************************************\
|* openXwindow																   *|
\*******************************************************************************/
void openXwindow(int argc, char *argv[], char *pixmap_bytes[], char *pixmask_bits, int pixmask_width, int pixmask_height)
{

	unsigned int borderwidth = 1;
	XClassHint classHint;
	char *display_name = NULL;
	char *wname = argv[0];
	XTextProperty name;

	XGCValues gcv;
	unsigned long gcm;

	char *geometry = NULL;

	int dummy = 0;
	int i, wx, wy;

	for (i = 1; argv[i]; i++) {
		if (!strcmp(argv[i], "-display")) {
			display_name = argv[i + 1];
			i++;
		}
		if (!strcmp(argv[i], "-geometry")) {
			geometry = argv[i + 1];
			i++;
		}
	}

	if (!(display = XOpenDisplay(display_name))) {
		fprintf(stderr, "%s: can't open display %s\n",
			wname, XDisplayName(display_name));
		exit(1);
	}
	screen = DefaultScreen(display);
	Root = RootWindow(display, screen);
	d_depth = DefaultDepth(display, screen);
	x_fd = XConnectionNumber(display);

	/* Convert XPM to XImage */
	GetXPM(&wmgen, pixmap_bytes);

	/* Create a window to hold the stuff */
	mysizehints.flags = USSize | USPosition;
	mysizehints.x = 0;
	mysizehints.y = 0;

	back_pix = GetColor("white");
	fore_pix = GetColor("black");

	XWMGeometry(display, screen, Geometry, NULL, borderwidth, &mysizehints,
		    &mysizehints.x, &mysizehints.y, &mysizehints.width, &mysizehints.height, &dummy);

	mysizehints.width = 64;
	mysizehints.height = 64;

	win = XCreateSimpleWindow(display, Root, mysizehints.x, mysizehints.y,
				  mysizehints.width, mysizehints.height, borderwidth, fore_pix, back_pix);

	iconwin = XCreateSimpleWindow(display, win, mysizehints.x, mysizehints.y,
				      mysizehints.width, mysizehints.height, borderwidth, fore_pix, back_pix);

	/* Activate hints */
	XSetWMNormalHints(display, win, &mysizehints);
	classHint.res_name = wname;
	classHint.res_class = wname;
	XSetClassHint(display, win, &classHint);

	XSelectInput(display, win, ButtonPressMask | ExposureMask | ButtonReleaseMask | PointerMotionMask | StructureNotifyMask);
	XSelectInput(display, iconwin, ButtonPressMask | ExposureMask | ButtonReleaseMask | PointerMotionMask | StructureNotifyMask);

	if (XStringListToTextProperty(&wname, 1, &name) == 0) {
		fprintf(stderr, "%s: can't allocate window name\n", wname);
		exit(1);
	}
	XSetWMName(display, win, &name);

	/* Create GC for drawing */

	gcm = GCForeground | GCBackground | GCGraphicsExposures;
	gcv.foreground = fore_pix;
	gcv.background = back_pix;
	gcv.graphics_exposures = 0;
	NormalGC = XCreateGC(display, Root, gcm, &gcv);

	/* ONLYSHAPE ON */

	pixmask = XCreateBitmapFromData(display, win, pixmask_bits, pixmask_width, pixmask_height);

	XShapeCombineMask(display, win, ShapeBounding, 0, 0, pixmask, ShapeSet);
	XShapeCombineMask(display, iconwin, ShapeBounding, 0, 0, pixmask, ShapeSet);

	/* ONLYSHAPE OFF */

	mywmhints.initial_state = WithdrawnState;
	mywmhints.icon_window = iconwin;
	mywmhints.icon_x = mysizehints.x;
	mywmhints.icon_y = mysizehints.y;
	mywmhints.window_group = win;
	mywmhints.flags = StateHint | IconWindowHint | IconPositionHint | WindowGroupHint;

	XSetWMHints(display, win, &mywmhints);

	XSetCommand(display, win, argv, argc);
	XMapWindow(display, win);


	if (geometry) {
		if (sscanf(geometry, "+%d+%d", &wx, &wy) != 2) {
			fprintf(stderr, "Bad geometry string.\n");
			exit(1);
		}
		XMoveWindow(display, win, wx, wy);
	}
}

/*

 * font_init
 */
void font_init()
{
	GetXPM(&wmfont, charset_xpm);
}

void draw_char(char c, int x, int y)
{
	int sx, sy;
	sx = (c - 32) * 6;
	sy = 0;
	XCopyArea(display, wmfont.pixmap, wmgen.pixmap, NormalGC, sx, sy, 6, 7,
		  x, y);
}

void draw_string(char *s, int x, int y)
{
	int i = 0;
	int x_space = 6;

	while (i < strlen(s)) {
		if ((x + (x_space * i)) < 64) {
			draw_char(s[i], x + (x_space * i), y);
		}
		i++;
	}
}