dockapps/wmMatrix/xutils.c

/*
 *   xutils.c - A collection of X-windows utilties for creating WindowMAker
 *		DockApps. 
 *
 *     This file contains alot of the lower-level X windows routines. Origins with wmppp
 *     (by  Martijn Pieterse (pieterse@xs4all.nl)), but its been hacked up quite a bit
 *     and passed on from one new DockApp to the next. 
 *
 *
 *
 *
 *      This program 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 2, or (at your option)
 *      any later version.
 *
 *      This program 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 this program (see the file COPYING); if not, write to the
 *      Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 *      Boston, MA 02110-1301 USA
 *
 *
 *
 *
 */
#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 <sys/time.h>
#include <sys/select.h>
#include "xutils.h"

/*
 *   X11 Variables 
 */
int x_fd;
XSizeHints mysizehints;
XWMHints mywmhints;
Pixel back_pix, fore_pix;
char *Geometry = "";
GC NormalGC;
GC EraseGC;
XpmIcon wmgen;
Pixmap pixmask;

/*
 *  Colors for wmCalClock
 */
extern char TimeColor[30];
extern char BackgroundColor[30];

/*
 *   flush_expose
 */
static int flush_expose(Window w)
{

	XEvent dummy;
	int i = 0;

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

	return i;

}

/*
 *   RedrawWindow
 *   RedrawWindowXY
 */
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);

}

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);

}

/*
 *   copyXPMArea
 *   copyXBMArea
 */
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);
}

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);
}

/*
 *   initXwindow
 */
void initXwindow(int argc, char *argv[])
{

	int i;
	char *display_name = NULL;

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

	if (!(display = XOpenDisplay(display_name))) {
		fprintf(stderr, "%s: can't open display %s\n", argv[0], XDisplayName(display_name));
		exit(1);
	}

	screen = DefaultScreen(display);
	Root = RootWindow(display, screen);
	DisplayDepth = DefaultDepth(display, screen);
	x_fd = XConnectionNumber(display);

}

/*
 *   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 *wname = argv[0];
	XTextProperty name;
	XGCValues gcv;
	unsigned long gcm;
	int dummy = 0, red, grn, blu;
	XpmColorSymbol cols[10] = { {"Back", NULL, 0},
	{"Color1", NULL, 0},
	{"Color2", NULL, 0},
	{"Color3", NULL, 0},
	{"Color4", NULL, 0},
	{"Color5", NULL, 0},
	{"Color6", NULL, 0},
	{"Color7", NULL, 0},
	{"Color8", NULL, 0},
	{"Color9", NULL, 0}
	};

	/* 
	 *  Create Pixmap
	 */
	cols[0].pixel = getColor(BackgroundColor, 1.0000, &red, &grn, &blu);
	cols[1].pixel = getBlendedColor(TimeColor, 0.1522, red, grn, blu);
	cols[2].pixel = getBlendedColor(TimeColor, 0.2602, red, grn, blu);
	cols[3].pixel = getBlendedColor(TimeColor, 0.3761, red, grn, blu);
	cols[4].pixel = getBlendedColor(TimeColor, 0.4841, red, grn, blu);
	cols[5].pixel = getBlendedColor(TimeColor, 0.5922, red, grn, blu);
	cols[6].pixel = getBlendedColor(TimeColor, 0.6980, red, grn, blu);
	cols[7].pixel = getBlendedColor(TimeColor, 0.7961, red, grn, blu);
	cols[8].pixel = getBlendedColor(TimeColor, 0.8941, red, grn, blu);
	cols[9].pixel = getBlendedColor(TimeColor, 1.0000, red, grn, blu);

	wmgen.attributes.numsymbols = 10;
	wmgen.attributes.colorsymbols = cols;
	wmgen.attributes.exactColors = False;
	wmgen.attributes.closeness = 40000;
	wmgen.attributes.valuemask = XpmReturnPixels | XpmReturnExtensions | XpmColorSymbols | XpmExactColors | XpmCloseness | XpmSize;
	if (XpmCreatePixmapFromData(display, Root, pixmap_bytes, &(wmgen.pixmap), &(wmgen.mask), &(wmgen.attributes)) != XpmSuccess) {
		fprintf(stderr, "Not enough free colorcells.\n");
		exit(1);
	}

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

	back_pix = getColor("black", 1.0, &red, &grn, &blu);
	fore_pix = getColor("white", 1.0, &red, &grn, &blu);

	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);

	/*
	 *  Set up the xevents that you want the relevent windows to inherit
	 *  Currently, its seems that setting KeyPress events here has no
	 *  effect. I.e. for some you will need to Grab the focus and then return
	 *  it after you are done...
	 */
	XSelectInput(display, win, ButtonPressMask | ExposureMask | ButtonReleaseMask
				 | PointerMotionMask | StructureNotifyMask | EnterWindowMask | LeaveWindowMask | KeyPressMask | KeyReleaseMask);
	XSelectInput(display, iconwin, ButtonPressMask | ExposureMask | ButtonReleaseMask
				 | PointerMotionMask | StructureNotifyMask | EnterWindowMask | LeaveWindowMask | KeyPressMask | KeyReleaseMask);

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

	XSetWMName(display, win, &name);

	/* 
	 *   Create Graphics Context (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);

	/* 
	 *   Create Graphics Context (GC) for erasing 
	 */
	gcm = GCForeground | GCBackground | GCGraphicsExposures;
	gcv.foreground = back_pix;
	gcv.background = back_pix;
	gcv.graphics_exposures = 0;
	EraseGC = XCreateGC(display, Root, gcm, &gcv);

	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);

	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);

}

unsigned long getColor(char *ColorName, float fac, int *red, int *grn, int *blu)
{

	XColor Color;
	XWindowAttributes Attributes;

	XGetWindowAttributes(display, Root, &Attributes);
	Color.pixel = 0;

	XParseColor(display, Attributes.colormap, ColorName, &Color);
	Color.red = (unsigned short)(fac * (Color.red - 24) + 24);
	Color.blue = (unsigned short)(fac * (Color.blue - 24) + 24);
	Color.green = (unsigned short)(fac * (Color.green - 24) + 24);
	Color.flags = DoRed | DoGreen | DoBlue;
	XAllocColor(display, Attributes.colormap, &Color);

	*red = Color.red;
	*grn = Color.green;
	*blu = Color.blue;
	return Color.pixel;

}

unsigned long getBlendedColor(char *ColorName, float fac, int red, int grn, int blu)
{

	XColor Color;
	XWindowAttributes Attributes;

	XGetWindowAttributes(display, Root, &Attributes);
	Color.pixel = 0;

	XParseColor(display, Attributes.colormap, ColorName, &Color);
	Color.red = (unsigned short)(fac * (Color.red - red) + red);
	Color.blue = (unsigned short)(fac * (Color.blue - grn) + grn);
	Color.green = (unsigned short)(fac * (Color.green - blu) + blu);
	Color.flags = DoRed | DoGreen | DoBlue;
	XAllocColor(display, Attributes.colormap, &Color);

	return Color.pixel;

}

/*
 *  Here is a faster version of usleep using select()
 */
void uusleep(unsigned long usecs)
{

	struct timeval tv;
	fd_set fds;
	tv.tv_sec = usecs / 1000000UL;
	tv.tv_usec = usecs % 1000000UL;
	FD_ZERO(&fds);
	FD_SET(x_fd, &fds);
	select(x_fd + 1, &fds, NULL, NULL, &tv);

}

/*
 *  This version assumes the tv_sec value will be zero. I.e. the delay
 *  will be less than 1 second. This allows us to save on a div operation.
 *
 */
void short_uusleep(unsigned long usecs)
{

	struct timeval tv;
	fd_set fds;
	tv.tv_sec = 0;
	tv.tv_usec = usecs;
	FD_ZERO(&fds);
	FD_SET(x_fd, &fds);
	select(x_fd + 1, &fds, NULL, NULL, &tv);

}