/***********************************************************************
 *   Code is based on wmppp, wmload, wmtime, wmcp, and asbutton
 *   Author: Edward H. Flora <ehflora@ksu.edu>
 *   Ver 0 Rel 6.1    Jan 23, 2005
 *
 *   Contributors:
 *              Christian 'Greek0' Aichinger <Greek0@gmx.net>
 *                  Did some code cleanup and fixed several memory leaks.
 *              Ralf Horstmann <ralf.horstmann@gmx.de>
 *                  Added ability to load pixmaps at startup,
 *                  without having to re-compile
 *              Michael Cohrs <camico@users.sourceforge.net> 
 *                  Added Tool Tips, and updated graphics
 *              Bruno Essmann <essmann@users.sourceforge.net>)
 *                  Creator of wmpager
 *              Casey Harkins <charkins@cs.wisc.edu> 
 *                  Bug fix reading config file path - 3/6/99
 *                  Added button-presses, and other - denoted by *charkins*
 *              Ben Cohen <buddog@aztec.asu.edu>
 *                  original author of wmcp (et al.)
 *              Thomas Nemeth <tnemeth@multimania.com>
 *                  contributor to wmcp
 *              Casey Harkins <charkins@cs.wisc.edu> 
 *                  Bug fix reading config file path - 3/6/99
 *                  Added button-presses, and other - denoted by *charkins*
 *              Michael Henderson <mghenderson@lanl.gov>
 *                  Application ideas, suggestions
 *              Ryan ?? <pancake@mindspring.com> 
 *                  Modified wmbutton to asbutton.
 *                  Note: asbutton is a seperate program, not associated 
 *                        with wmbutton (just as wmbutton is not associated
 *                        with wmcp)
 *              Jon Bruno
 *                  Web Page Development
 *    The contributors listed above are not necessarily involved with the 
 *    development of wmbutton.  I'm listing them here partially as thanks for 
 *    helping out, catching bugs in the code, etc.
 ***********************************************************************/
#include <stdio.h>
#include <math.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <unistd.h>

#include "wmbutton.h"

#include "backdrop.xpm"           /* background graphic */
#include "buttons.xpm"            /* graphic of 9 buttons */
#include "mask.xbm"               /* Border Graphic */

/*************** Function Prototypes ***********************************/
void redraw(void);                 
void getPixmaps(void);
int  whichButton(int x, int y);   // determine which button has been pressed
void SetWmHints();
void SetClassHints();

/***********************************************************************
 * 		Globals..    OK.. there's too many globals.
 *                           Feel free and fix it, if you'd like.
 ***********************************************************************/
Display *display;
int screen;
Window rootwin, win, iconwin;
GC gc;
int depth;
Pixel bg_pixel, fg_pixel;

struct Config_t Config;

typedef struct _XpmIcon {
  Pixmap pixmap;
  Pixmap mask;
  XpmAttributes attributes;
} XpmIcon;

typedef struct _button_region {
  int x,y;
  int i,j;
} ButtonArea;

ButtonArea button_region[9];

XpmIcon template, visible, buttons;

int border  = 0;
int button_pressed = -1;	/* button to be drawn pressed *charkins*/

char *app_name = "wmbutton";

/***********************************************************************
 * 		Main
 ***********************************************************************/
int main( int argc, char ** argv ) {

  XEvent report;
  XGCValues xgcValues;	
  XTextProperty app_name_atom;
  XSizeHints xsizehints;

  Pixmap pixmask;

  int dummy = 0;
  int N = 1;		        /* Button number pressed to goto app # */
  
  /* Added for Tool Tip Support */
  long nTooltipShowDelay = TOOLTIP_SHOW_DELAY;
  long nTooltipReshowDelay = TOOLTIP_RESHOW_DELAY;
  long nTooltipTimer = -1;
  long nTooltipHideTimer = -1;
  long nNow;
  int nTooltipButton = 0, nTooltipX = 0, nTooltipY = 0;

  /* Parse Command Line Arguments */  
  parseargs(argc, argv);

  /* Open Display */
  if ( (display = XOpenDisplay(Config.Display_str)) == NULL ) 
    err_mess(FAILDISP, Config.Display_str);
  
  screen  = DefaultScreen(display);
  rootwin = RootWindow(display,screen);
  depth   = DefaultDepth(display, screen);
  
  bg_pixel = WhitePixel(display, screen ); 
  fg_pixel = BlackPixel(display, screen ); 
  
  xsizehints.flags  = USSize | USPosition;
  xsizehints.width  = 64;
  xsizehints.height = 64;
  
  /* Parse Geometry string and fill in sizehints fields */
  XWMGeometry(display, screen, 
	      Config.Geometry_str, 
	      NULL, 	
	      border, 
	      &xsizehints,
	      &xsizehints.x, 
	      &xsizehints.y,
	      &xsizehints.width,
	      &xsizehints.height, 
	      &dummy);
  
  if ( (win = XCreateSimpleWindow(display,
				  rootwin,
				  xsizehints.x,
				  xsizehints.y,
				  xsizehints.width,
				  xsizehints.height,
				  border,
				  fg_pixel, bg_pixel) ) == 0 )
    err_mess(FAILSWIN, NULL);

  
  if ( (iconwin = XCreateSimpleWindow(display,
				      win,
				      xsizehints.x,
				      xsizehints.y,
				      xsizehints.width,
				      xsizehints.height,
				      border,
				      fg_pixel, bg_pixel) ) == 0 )
    err_mess(FAILICON, NULL);

  /* Set up shaped windows */
  /*Gives the appicon a border so you can grab and move it. */

  if ( ( pixmask = XCreateBitmapFromData(display, 
					 win,
					 mask_bits,
					 mask_width,
					 mask_height) )  == 0 )
    err_mess(FAILXPM,NULL);

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

  /* Convert in pixmaps from .xpm includes. */
  getPixmaps();

  /* Interclient Communication stuff */
  /* Appicons don't work with out this stuff */
  SetWmHints();
  SetClassHints();


  XSetWMNormalHints( display, win, &xsizehints );
  
  /* Tell window manager what the title bar name is. We never see */
  /* this anyways in the WithdrawnState      */
  if ( XStringListToTextProperty(&app_name, 1, &app_name_atom) == 0 )
    err_mess(FAILWNAM,app_name);
  XSetWMName( display, win, &app_name_atom );
  
  /* Create Graphic Context */	
  if (( gc = XCreateGC(display, win,(GCForeground | GCBackground), &xgcValues))
       == NULL )
    err_mess(FAILGC,NULL);

  /* XEvent Masks. We want both window to process X events */
  XSelectInput(display, win,
	       ExposureMask | 
	       ButtonPressMask | 
	       ButtonReleaseMask |    	/* added ButtonReleaseMask *charkins*/
	       PointerMotionMask |
	       StructureNotifyMask |
	       LeaveWindowMask );  
  XSelectInput(display, iconwin,
	       ExposureMask | 
	       ButtonPressMask | 
	       ButtonReleaseMask |	/* added ButtonReleaseMask *charkins*/
	       PointerMotionMask |
	       StructureNotifyMask |
	       LeaveWindowMask );
  
  /* Store the 'state' of the application for restarting */
  XSetCommand( display, win, argv, argc );	

  /* Window won't ever show up until it is mapped.. then drawn after a 	*/
  /* ConfigureNotify */
  XMapWindow( display, win );

  /* Initialize Tooltip Support */
  initTime();
  initTooltip(!Config.bTooltipDisable, Config.szTooltipFont, Config.bTooltipSwapColors);

  /* X Event Loop */
  while (1) {
    while (XPending(display) || nTooltipTimer == -1) {
      XNextEvent(display, &report );
      switch (report.type) {
      case Expose:
	if (report.xexpose.count != 0) {	
	  break;
	}
	if ( Config.Verbose ) fprintf(stdout,"Event: Expose\n");	
	redraw();
	break;      

      case ConfigureNotify:
	if ( Config.Verbose ) fprintf(stdout,"Event: ConfigureNotify\n");	
	redraw();
	break;

      case MotionNotify:
	if (hasTooltipSupport()) {
	  if (!hasTooltip()) {
	    nTooltipTimer= currentTimeMillis();
	    nTooltipX= report.xbutton.x;
	    nTooltipY= report.xbutton.y;
	    nTooltipButton= whichButton(report.xbutton.x, report.xbutton.y);
	  } else {
	    int nButton = whichButton(report.xbutton.x, report.xbutton.y);
	    if (nButton != nTooltipButton) {
	      hideTooltip();
	      nTooltipTimer= -1;
	      nTooltipX = report.xbutton.x;
	      nTooltipY = report.xbutton.y;
	      nTooltipButton = nButton;
	      showTooltip(nTooltipButton, nTooltipX, nTooltipY);
	    }
	  }
	}
	break;
      
      case LeaveNotify:
	if ( Config.Verbose ) fprintf(stdout,"Event: LeaveNotify\n");	
	if (hasTooltip()) {
	  hideTooltip();
	  nTooltipHideTimer= currentTimeMillis();
	}
	nTooltipTimer= -1;
	break;

      case ButtonPress:	/* draw button pressed, don't launch *charkins*/
	if (hasTooltip()) {
	  hideTooltip();
	  nTooltipHideTimer= currentTimeMillis();
	}	switch (report.xbutton.button) {
	case Button1:
	  N = whichButton(report.xbutton.x, report.xbutton.y );
	  if ( (N >= 0) && (N <= NUMB_OF_APPS) ) {
	    button_pressed = N + LMASK;
	    redraw();
	  }

	  if ( Config.Verbose ) 
	    fprintf(stdout,"Button 1:x=%d y=%d N=%d\n", 
		    report.xbutton.x, report.xbutton.y, N+LMASK);	

	  break;
	case Button2:
	  if (Config.mmouse) {
	    N = whichButton(report.xbutton.x, report.xbutton.y );
	    if ( (N >= 0) && (N <= NUMB_OF_APPS) ) {
	      button_pressed = N + MMASK;
	      redraw();
	    }

	    if ( Config.Verbose ) 
	      fprintf(stdout,"Button 2:x=%d y=%d N=%d\n", 
		      report.xbutton.x, report.xbutton.y, N+MMASK);

	  }
	  break;
	case Button3:
	  N = whichButton(report.xbutton.x, report.xbutton.y );
	  if ( (N >= 0) && (N <= NUMB_OF_APPS) ) {
	    button_pressed = N + RMASK;
	    redraw();
	  }

	  if ( Config.Verbose ) 
	    fprintf(stdout,"Button 3:x=%d y=%d N=%d\n", 
		    report.xbutton.x, report.xbutton.y, N+RMASK);

	  break;
	}
	break;
      case ButtonRelease:   /* launch app here if still over button *charkins*/
	switch (report.xbutton.button) {
	case Button1:
	  N = whichButton(report.xbutton.x, report.xbutton.y );
	  if ( (N >= 0) && (N <= NUMB_OF_APPS) && (N == button_pressed))
	    RunAppN( N + LMASK);
	  button_pressed=-1;
	  redraw();

	  if ( Config.Verbose ) 
	    fprintf(stdout,"Button 1:x=%d y=%d N=%d\n", 
		    report.xbutton.x, report.xbutton.y, N+LMASK);	

	  break;
	case Button2:
	  if (Config.mmouse) {
	    N = whichButton(report.xbutton.x, report.xbutton.y );
	    if ( (N >= 0) && (N <= NUMB_OF_APPS) && (N == button_pressed))
	      RunAppN( N + MMASK);
	    button_pressed=-1;
	    redraw();

	    if ( Config.Verbose ) 
	      fprintf(stdout,"Button 2:x=%d y=%d N=%d\n", 
		      report.xbutton.x, report.xbutton.y, N+MMASK);

	  }
	  break;
	case Button3:
	  N = whichButton(report.xbutton.x, report.xbutton.y );
	  if ( (N >= 0) && (N <= NUMB_OF_APPS) && (N == button_pressed))
	    RunAppN( N + RMASK);
	  button_pressed=-1;
	  redraw();

	  if ( Config.Verbose ) 
	    fprintf(stdout,"Button 3:x=%d y=%d N=%d\n", 
		    report.xbutton.x, report.xbutton.y, N+RMASK);

	  break;
	}
	break;
      case DestroyNotify:

	if ( Config.Verbose ) fprintf(stdout, "Bye\n");

	destroyTooltip();
	XFreeGC(display, gc);
	XDestroyWindow(display,win);
	XDestroyWindow(display,iconwin);
	XCloseDisplay(display);
	exit(0);
	break;
      }
    }

    usleep(50000);
    nNow = currentTimeMillis();
    if ( nTooltipTimer != -1 && 
	 ( (nNow > nTooltipTimer + nTooltipShowDelay) || (nNow < nTooltipHideTimer + nTooltipReshowDelay) ) ) {
      showTooltip(nTooltipButton, nTooltipX, nTooltipY);
      nTooltipTimer = -1;
    }
    
  }

  return (0);
}/***********************************************************************/

/***********************************************************************
 *   redraw
 *
 *	 Map the button region coordinates.
 *
 *   Draw the appropriate number of buttons on the 'visible' Pixmap 
 *   using data from the 'buttons' pixmap.
 *
 *   Then, copy the 'visible' pixmap to the two windows ( the withdrawn
 *   main window and the icon window which is the main window's icon image.)
 ***********************************************************************/
void redraw() {
  int n;
  int i,j;
  int dest_x, dest_y;
  int space;
  int offset;
  int bsize = 18;

  if ( Config.Verbose ) fprintf(stdout,"In Redraw()\n");	
  space = 0;
  offset = 5;
  XCopyArea(display, template.pixmap, visible.pixmap, gc, 0, 0,
	    template.attributes.width, template.attributes.height, 0, 0 ); 
 
  for ( j=0; j < 3; j++ ) {
    for ( i=0; i < 3; i++ ) {
      n = i + j * 3;
      dest_x = i*(bsize + space) + offset + space;
      dest_y = j*(bsize + space) + offset + space;
      
      /* Define button mouse coords */
      button_region[n].x = dest_x;
      button_region[n].y = dest_y;
      button_region[n].i = dest_x + bsize - 1;
      button_region[n].j = dest_y + bsize - 1; 
      
      /* Copy button images for valid apps */
      if (  (n + 1) <= NUMB_OF_APPS ) {
        XCopyArea(display, buttons.pixmap, visible.pixmap, gc, 
	          i * bsize, j * bsize, bsize, bsize, dest_x, dest_y);
      } 
    }
  }

  if ( button_pressed>0 ) {	/* draw pressed button *charkins*/
    if(button_pressed>RMASK) button_pressed-=RMASK;
    else if(button_pressed>MMASK) button_pressed-=MMASK;
    else if(button_pressed>LMASK) button_pressed-=LMASK;
    i = (button_pressed-1) % 3;	/* get col of button */
    j = (button_pressed-1) / 3;	/* get row of button */
    dest_x = i * (bsize + space) + offset + space;
    dest_y = j * (bsize + space) + offset + space;
    XSetForeground(display, gc, bg_pixel);
    XDrawLine(display, visible.pixmap, gc,
	      dest_x+1, dest_y+bsize-1, dest_x+bsize-1, dest_y+bsize-1);
    XDrawLine(display, visible.pixmap, gc,
	      dest_x+bsize-1, dest_y+bsize-1, dest_x+bsize-1, dest_y+1);
    XSetForeground(display, gc, fg_pixel);
    XDrawLine(display, visible.pixmap, gc,
	      dest_x, dest_y, dest_x+bsize-2, dest_y);
    XDrawLine(display, visible.pixmap, gc,
	      dest_x, dest_y, dest_x, dest_y+bsize-2);
  } /*charkins*/
  
  flush_expose( win ); 
  XCopyArea(display, visible.pixmap, win, gc, 0, 0,
	    visible.attributes.width, visible.attributes.height, 0, 0 ); 
  flush_expose( iconwin ); 
  XCopyArea(display, visible.pixmap, iconwin, gc, 0, 0,
	    visible.attributes.width, visible.attributes.height, 0, 0 );

}/***********************************************************************/

/***********************************************************************
 *  whichButton
 *
 *  Return the button that at the x,y coordinates. The button need not
 *  be visible ( drawn ). Return -1 if no button match.
 ***********************************************************************/
int whichButton( int x, int y ) {
  int index;

  for ( index=0; index < NUMB_OF_APPS; index++ ) {
    if ( x >= button_region[index].x &&
	 x <= button_region[index].i &&
	 y >= button_region[index].y &&
	 y <= button_region[index].j  ) {
      return( index + 1);
    }
  }
  return(-1);
}/***********************************************************************/


/***********************************************************************
 *   getPixmaps
 *    
 *   Load XPM data into X Pixmaps.
 *  
 *   Pixmap template contains the untouched window backdrop image.
 *   Pixmap visible is the template pixmap with buttons drawn on it.
 *          -- what is seen by the user.
 *   Pixmap buttons holds the images for individual buttons that are
 *          later copied onto Pixmap visible.
 ***********************************************************************/
void getPixmaps() {
  int loaded = 0;
  template.attributes.valuemask |= (XpmReturnPixels | XpmReturnExtensions);
  visible.attributes.valuemask  |= (XpmReturnPixels | XpmReturnExtensions);
  buttons.attributes.valuemask  |= (XpmReturnPixels | XpmReturnExtensions);
  

  if (Config.Verbose) fprintf(stdout, "In getPixmaps\n");
  /* Template Pixmap. Never Drawn To. */
  if ( XpmCreatePixmapFromData(	display, rootwin, backdrop_xpm,
				&template.pixmap, &template.mask, 
				&template.attributes) != XpmSuccess )
    err_mess(FAILTMPL, NULL);

  /* Visible Pixmap. Copied from template Pixmap and then drawn to. */
  if ( XpmCreatePixmapFromData(	display, rootwin, backdrop_xpm,
				&visible.pixmap, &visible.mask, 
				&visible.attributes) != XpmSuccess )
    err_mess(FAILVIS, NULL);
  
  /* Button Pixmap.  */
  if ( access( Config.buttonfile, R_OK  ) == 0 ) {
    /* load buttons from file */
    if ( XpmReadFileToPixmap( display, rootwin, Config.buttonfile,
      			      &buttons.pixmap, &buttons.mask, 
			      &buttons.attributes) != XpmSuccess ) {
      err_mess(FAILBUT, NULL); 
    } else {
      loaded = 1;
    }
  }
  if (! loaded) { 
    /* Use Builtin Button Pixmap.  */
    if (Config.Verbose) fprintf(stdout, "Using builtin buttons pixmap\n");
    if ( XpmCreatePixmapFromData( display, rootwin, buttons_xpm,
				  &buttons.pixmap, &buttons.mask, 
				  &buttons.attributes) != XpmSuccess )
      err_mess(FAILBUT, NULL); 
  }
  if (Config.Verbose) fprintf(stdout, "Leaving getPixmaps\n");

}/*********************************************************************/

void SetWmHints() {
  XWMHints *xwmhints;

  xwmhints = XAllocWMHints();
  xwmhints->flags = WindowGroupHint | IconWindowHint | StateHint;	
  xwmhints->icon_window = iconwin;
  xwmhints->window_group = win;
  xwmhints->initial_state = WithdrawnState;  
  XSetWMHints( display, win, xwmhints );
	XFree(xwmhints);
	xwmhints = NULL;
}

void SetClassHints() {
  XClassHint xclasshint;

  xclasshint.res_name = "wmbutton";
  xclasshint.res_class = "Wmbutton";
  XSetClassHint( display, win, &xclasshint );
}