// Copyright (c) 2002 Henrik Kinnunen (fluxgen at linuxmail.org)
// Copyright (c) 1997 - 2000 Brad Hughes <bhughes at trolltech.com>
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the "Software"),
// to deal in the Software without restriction, including without limitation
// the rights to use, copy, modify, merge, publish, distribute, sublicense,
// and/or sell copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER

// $Id: bsetroot.cc,v 1.13 2002/11/30 21:07:51 fluxgen Exp $

#include "bsetroot.hh"

#include "../src/i18n.hh"
#include "../src/ImageControl.hh"

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif // HAVE_CONFIG_H

#include <X11/Xatom.h>

#include <cstring>
#include <cstdlib>
#include <cstdio>
#include <iostream>

using namespace std;

bsetroot::bsetroot(int argc, char **argv, char *dpy_name)
  : BaseDisplay(argv[0], dpy_name) {

	pixmaps = (Pixmap *) 0;
	grad = fore = back = (char *) 0;

	bool mod = false, sol = false, grd = false;
	int mod_x = 0, mod_y = 0, i = 0;

	img_ctrl = new BImageControl*[getNumberOfScreens()];
	for (; i < getNumberOfScreens(); i++) {
		img_ctrl[i] = new BImageControl(i, true);
	}

	for (i = 1; i < argc; i++) {
		if (! strcmp("-help", argv[i])) {
			usage();

		} else if ((! strcmp("-fg", argv[i])) ||
				(! strcmp("-foreground", argv[i])) ||
				(! strcmp("-from", argv[i]))) {
			if ((++i) >= argc)
				usage(1);
			fore = argv[i];

		} else if ((! strcmp("-bg", argv[i])) ||
				(! strcmp("-background", argv[i])) ||
				(! strcmp("-to", argv[i]))) {
			if ((++i) >= argc)
				usage(1);
			back = argv[i];

		} else if (! strcmp("-solid", argv[i])) {
			if ((++i) >= argc)
				usage(1);
      fore = argv[i];
      sol = true;

    } else if (! strcmp("-mod", argv[i])) {
      if ((++i) >= argc)
				usage();
			mod_x = atoi(argv[i]);
      if ((++i) >= argc)
				usage();
			mod_y = atoi(argv[i]);
			if (mod_x < 1)
				mod_x = 1;
			if (mod_y < 1)
				mod_y = 1;
			mod = true;

		} else if (! strcmp("-gradient", argv[i])) {
			if ((++i) >= argc)
				usage();

			grad = argv[i];
			grd = true;

		} else if (! strcmp("-display", argv[i])) {
			// -display passed through tests earlier... we just skip it now
			i++;

		} else
			usage();
	}

	if ((mod + sol + grd) != true) {
		fprintf(stderr,
			I18n::instance()->
			getMessage(
				FBNLS::bsetrootSet, FBNLS::bsetrootMustSpecify,
				"%s: error: must specify on of: -solid, -mod, -gradient\n"),
			getApplicationName());

		usage(2);
	}

	display = getXDisplay();
	num_screens = getNumberOfScreens();
 
	if (sol && fore)
		solid();
	else if (mod && mod_x && mod_y && fore && back)
		modula(mod_x, mod_y);
	else if (grd && grad && fore && back)
		gradient();
	else
		usage();

}


bsetroot::~bsetroot() {
	XKillClient(display, AllTemporary);

	if (pixmaps) { // should always be true
		XSetCloseDownMode(display, RetainTemporary);

		delete [] pixmaps;
	}

	if (img_ctrl != 0) {
		int i = 0;
		for (; i < num_screens; i++)
			delete img_ctrl[i];

		delete [] img_ctrl;
	} 
}

/**
 set root pixmap atoms so that apps like
 Eterm and xchat will be able to use
 transparent background
*/
void bsetroot::setRootAtoms(Pixmap pixmap, int screen) {
	Atom atom_root, atom_eroot, type;
	unsigned char *data_root, *data_eroot;
	int format;
	unsigned long length, after;

	atom_root = XInternAtom(display, "_XROOTMAP_ID", true);
	atom_eroot = XInternAtom(display, "ESETROOT_PMAP_ID", true);

	// doing this to clean up after old background
	if (atom_root != None && atom_eroot != None) {
		XGetWindowProperty(display, getScreenInfo(screen)->getRootWindow(),
			atom_root, 0L, 1L, false, AnyPropertyType,
			&type, &format, &length, &after, &data_root);

		if (type == XA_PIXMAP) {
    	XGetWindowProperty(display, getScreenInfo(screen)->getRootWindow(),
				atom_eroot, 0L, 1L, False, AnyPropertyType,
				&type, &format, &length, &after, &data_eroot);

			if (data_root && data_eroot && type == XA_PIXMAP &&
					*((Pixmap *) data_root) == *((Pixmap *) data_eroot)) {

				XKillClient(display, *((Pixmap *) data_root));
			}
		}
	}

	atom_root = XInternAtom(display, "_XROOTPMAP_ID", false);
	atom_eroot = XInternAtom(display, "ESETROOT_PMAP_ID", false);

	if (atom_root == None || atom_eroot == None) {
		cerr<<"couldn't create pixmap atoms, giving up!"<<endl;
		exit(1);
	}

	// setting new background atoms
	XChangeProperty(display, getScreenInfo(screen)->getRootWindow(),
		atom_root, XA_PIXMAP, 32, PropModeReplace, (unsigned char *) &pixmap, 1);
	XChangeProperty(display, getScreenInfo(screen)->getRootWindow(),
		atom_eroot, XA_PIXMAP, 32, PropModeReplace, (unsigned char *) &pixmap, 1);

}

//-------------- solid --------------------
// draws pixmaps with a single color 
//-----------------------------------------
void bsetroot::solid() {
  register int screen = 0;

	pixmaps = new Pixmap[getNumberOfScreens()];

  for (; screen < getNumberOfScreens(); screen++) {
    FbTk::Color c;
		GC gc;
		XGCValues gcv;

    c.setFromString(fore, screen);

    if (! c.isAllocated())
				c.setPixel(BlackPixel(getXDisplay(), screen));

		gcv.foreground = c.pixel();
		gc = XCreateGC(getXDisplay(), getScreenInfo(screen)->getRootWindow(),
			GCForeground , &gcv);

		pixmaps[screen] = XCreatePixmap(getXDisplay(), 
			getScreenInfo(screen)->getRootWindow(),
			getScreenInfo(screen)->getWidth(), getScreenInfo(screen)->getHeight(),
			getScreenInfo(screen)->getDepth());

		XFillRectangle(getXDisplay(), pixmaps[screen], gc, 0, 0,
			getScreenInfo(screen)->getWidth(), getScreenInfo(screen)->getHeight());

		setRootAtoms(pixmaps[screen], screen);

		XSetWindowBackgroundPixmap(getXDisplay(),
			getScreenInfo(screen)->getRootWindow(), pixmaps[screen]);

    XClearWindow(getXDisplay(), getScreenInfo(screen)->getRootWindow());

		XFreeGC(getXDisplay(), gc);
  }
}

//-------------- modula  ------------------
// draws pixmaps with an 16x16 pattern with
// fg and bg colors.
//-----------------------------------------
void bsetroot::modula(int x, int y) {
	char data[32];
	long pattern;

	register int screen, i;

	pixmaps = new Pixmap[getNumberOfScreens()];

	for (pattern = 0, screen = 0; screen < getNumberOfScreens(); screen++) {

		for (i = 0; i < 16; i++) {
			pattern <<= 1;
			if ((i % x) == 0)
				pattern |= 0x0001;
		}

		for (i = 0; i < 16; i++) {
			if ((i %  y) == 0) {
				data[(i * 2)] = (char) 0xff;
				data[(i * 2) + 1] = (char) 0xff;
			} else {
				data[(i * 2)] = pattern & 0xff;
				data[(i * 2) + 1] = (pattern >> 8) & 0xff;
			}
		}

		FbTk::Color f, b;
		GC gc;
		Pixmap bitmap, r_bitmap;
		XGCValues gcv;

		bitmap = XCreateBitmapFromData(getXDisplay(),
			getScreenInfo(screen)->getRootWindow(), data, 16, 16);

		// bitmap used as tile, needs to have the same depth as background pixmap
		r_bitmap = XCreatePixmap(getXDisplay(),
			getScreenInfo(screen)->getRootWindow(), 16, 16,
			getScreenInfo(screen)->getDepth());

		f.setFromString(fore, screen);
		b.setFromString(back, screen);

		if (! f.isAllocated())
			f.setPixel(WhitePixel(getXDisplay(), screen));
		if (! b.isAllocated())
			b.setPixel(BlackPixel(getXDisplay(), screen));

		gcv.foreground = f.pixel();
		gcv.background = b.pixel();

		gc = XCreateGC(getXDisplay(), getScreenInfo(screen)->getRootWindow(),
			GCForeground | GCBackground, &gcv);

		// copying bitmap to the one going to be used as tile
		XCopyPlane(getXDisplay(), bitmap, r_bitmap, gc,
			0, 0, 16, 16, 0, 0, 1l);

		XSetTile(getXDisplay(), gc, r_bitmap);
		XSetFillStyle(getXDisplay(), gc, FillTiled);	

		pixmaps[screen] = XCreatePixmap(getXDisplay(), 
			getScreenInfo(screen)->getRootWindow(),
			getScreenInfo(screen)->getWidth(), getScreenInfo(screen)->getHeight(),
			getScreenInfo(screen)->getDepth());

		XFillRectangle(getXDisplay(), pixmaps[screen], gc, 0, 0,
			getScreenInfo(screen)->getWidth(), getScreenInfo(screen)->getHeight());

		setRootAtoms(pixmaps[screen], screen);

		XSetWindowBackgroundPixmap(getXDisplay(),
			getScreenInfo(screen)->getRootWindow(), pixmaps[screen]);

		XClearWindow(getXDisplay(), getScreenInfo(screen)->getRootWindow());

		XFreeGC(getXDisplay(), gc);
		XFreePixmap(getXDisplay(), bitmap);
		XFreePixmap(getXDisplay(), r_bitmap);
	}
}

//-------------- gradient -----------------
// draws pixmaps with a fluxbox texure
//-----------------------------------------
void bsetroot::gradient(void) {
	register int screen;
	// using temporaray pixmap and then copying it to background pixmap, as it'll
	// get crashed somewhere on the way causing apps like XChat chrashing
	// as the pixmap has been destroyed
	Pixmap tmp;
	pixmaps = new Pixmap[getNumberOfScreens()];

	for (screen = 0; screen < getNumberOfScreens(); screen++) {
		FbTk::Texture texture;
		GC gc;
		XGCValues gcv;

		texture.setFromString(grad);
		texture.color().setFromString(fore, screen);
		texture.colorTo().setFromString(back, screen);
		
		if (! texture.color().isAllocated())
			texture.color().setPixel(WhitePixel(getXDisplay(), screen));
		if (! texture.colorTo().isAllocated())
			texture.colorTo().setPixel(BlackPixel(getXDisplay(), screen));

		tmp = img_ctrl[screen]->renderImage(getScreenInfo(screen)->getWidth(),
			getScreenInfo(screen)->getHeight(), texture);

		pixmaps[screen] = XCreatePixmap(getXDisplay(), 
			getScreenInfo(screen)->getRootWindow(),
			getScreenInfo(screen)->getWidth(), getScreenInfo(screen)->getHeight(),
			getScreenInfo(screen)->getDepth());

		gc = XCreateGC(getXDisplay(), getScreenInfo(screen)->getRootWindow(),
			GCForeground , &gcv);

		XCopyArea(getXDisplay(), tmp, pixmaps[screen], gc, 0, 0,
			getScreenInfo(screen)->getWidth(), getScreenInfo(screen)->getHeight(),
			0, 0);

		setRootAtoms(pixmaps[screen], screen);

	    XSetWindowBackgroundPixmap(getXDisplay(),
			getScreenInfo(screen)->getRootWindow(), pixmaps[screen]);

		XClearWindow(getXDisplay(), getScreenInfo(screen)->getRootWindow());

		if (! (getScreenInfo(screen)->getVisual()->c_class & 1)) {
			img_ctrl[screen]->removeImage(tmp);
			img_ctrl[screen]->timeout();
		}

		XFreeGC(getXDisplay(), gc);
	}
}

//-------------- usage --------------------
// shows information about usage
//-----------------------------------------
void bsetroot::usage(int exit_code) {
	fprintf(stderr,
		I18n::instance()->getMessage(
			FBNLS::bsetrootSet, FBNLS::bsetrootUsage,
			"%s 2.1 : (c) 2002 Claes Nasten\n"
			"%s 2.0 : (c) 1997-2000 Brad Hughes\n\n"
			"  -display <string>        display connection\n"
			"  -mod <x> <y>             modula pattern\n"
			"  -foreground, -fg <color> modula foreground color\n"
			"  -background, -bg <color> modula background color\n\n"
			"  -gradient <texture>      gradient texture\n"
			"  -from <color>            gradient start color\n"
			"  -to <color>              gradient end color\n\n"
			"  -solid <color>           solid color\n\n"
			"  -help                    print this help text and exit\n"),
			getApplicationName(), getApplicationName());
 
	exit(exit_code);
}


int main(int argc, char **argv) {
	char *display_name = (char *) 0;
	int i = 1;
  
	NLSInit("blackbox.cat");
  
	for (; i < argc; i++) {
		if (! strcmp(argv[i], "-display")) {
		// check for -display option

		if ((++i) >= argc) {
			fprintf(stderr,
				I18n::instance()->getMessage(
					FBNLS::mainSet, FBNLS::mainDISPLAYRequiresArg,
					"error: '-display' requires an argument\n"));
	
				::exit(1);
			}

			display_name = argv[i];
		}
	}
 
	bsetroot app(argc, argv, display_name);
 
	return (0);
}