//============================================================================
// Name        : testEnv.cpp
// Author      : 
// Version     :
// Copyright   : Your copyright notice
// Description : Hello World in C++, Ansi-style
//============================================================================
#include <iostream>
#include "stdio.h"
#include "string.h"
#include "Xatom.h"
#include "Xlib.h"

using namespace std;

#ifndef False
#define False 0
#endif


char *get_wnd_name (Display *disp, Window win) {
    Atom prop = XInternAtom(disp,"WM_NAME",False), type;
    int form;
    unsigned long remain, len;
    unsigned char *list;


    if (XGetWindowProperty(disp,win,prop,0,1024,False,XA_STRING,
                &type,&form,&len,&remain,&list) != Success) {

        return NULL;
    }

    return (char*)list;
}

/*
 * track xtree and fine the main wnd with brower name
 */
Window ** QueryChildrenList(Display *dsp,Window *proot ,unsigned int *num)
{
	 Window root_r;
	 Window parent_r;
	 Window **pchildren = 0;

	 Status status = XQueryTree(dsp,*proot,&root_r,&parent_r , pchildren, num);

	 if(status != 0)
		 return pchildren;

	 return 0;

}

Window *DeepScanTree_name(Display *dsp,Window *proot,char * name)
{
	 unsigned int num = 0;
	 Window **pList = QueryChildrenList(dsp,proot,&num);

	 if(0 == pList)
		 return 0;

	 for(int i = 0;i < num;i++)
	 {
		 Window *pwnd = pList[i];

		 //request wnd n and compare name
		 char *pname = get_wnd_name(dsp,*pwnd);

		 if(NULL != strstr(pname,name))
			 return pwnd;

		 Window *tmpL = DeepScanTree_name(dsp, pwnd,name);
		 if(tmpL != 0)
			 return tmpL;

	 }

	 return 0;
}

Window * find_main_wnd(char *browser)
{
	 puts(browser);
	 /*
	  * 1.open defaut Display
	  * 2.Request root desktop
	  * 3.track window tree for special window with name 'browser'
	  */
	 Display * dsp = XOpenDisplay(0);
	 Window rw = XDefaultRootWindow(dsp);

	  // DefaultRootWindow(0);
	 /**
	  * 1.Reqeust child list at first from root
	  * 2.scan all the child and find windown name
	  */
	 return DeepScanTree_name(dsp,&rw,browser);

}


int main() {
	find_main_wnd("fox");
	return 0;
}