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/* -*- Mode: C; indent-tabs-mode:nil; c-basic-offset:8 -*- */
/**
*This test example shows how to use the SAC api.
*
*This features a simple parser that says "hey" when
*it encounters the beginning of a CSS ruleset, and "woohoo"
*at the end of a CSS ruleset.
*
*To compile this file, type:
*
*gcc -g -o sac-example-1 `croco-config --cflags` `croco-config --libs` sac-example-1.c
*
*Make sure you have compiled and installed libcroco prior to trying to
*compile this file :)
*
*Once you have compiled it, type:
*
*./sac-example-1 <a-path-to-a-css-file>
*
*to try it on a CSS file of your choice.
*
*Initial Author: Dodji Seketeli <Dodji 47 seketeli dot org>
*/
#include <libcroco.h>
/**
*This is a callback function that will
*be called at the begining of each css ruleset.
*@param a_handler a pointer to the current sac
*document handler
*@param a_selector a pointer to the selector.
*of the current ruleset.
*/
static void
start_selector_cb (CRDocHandler *a_handler,
CRSelector *a_selector)
{
printf ("==========================================\n") ;
printf ("Hey, this is the begining of a ruleset\n") ;
}
/**
*This is a callback function that will be called at the end
*of the each css ruleset.
*/
static void
end_selector_cb (CRDocHandler *a_handler,
CRSelector *a_selector)
{
printf ("Woohoo, this is the end of a ruleset\n") ;
printf ("======================================\n\n") ;
}
/**
*Displays some information about how to use this program.
*@param a_prog_name the name of the current program.
*/
void
display_usage (unsigned char *a_prog_name)
{
unsigned char *prog_name = a_prog_name ;
if (!prog_name)
{
prog_name = (unsigned char*)"sac-example-1" ;
}
printf ("usage: %s [--help] | <css file name>\n", prog_name) ;
}
int
main (int argc, char **argv)
{
unsigned short i = 0 ;
unsigned char * file_path = NULL ;
CRParser * parser = NULL ;
CRDocHandler *sac_handler = NULL ;
if (argc <= 1)
{
display_usage ((unsigned char*)argv[0]) ;
return -1 ;
}
/*
*Let's parse the
*command line arguments of this
*program in this loop.
*/
for (i=1 ; i < argc ;i++)
{
if (*argv[i] != '-')
break ;
if (!strcmp (argv[i], "--help")
|| !strcmp (argv[i], "-h"))
{
display_usage ((unsigned char*)argv[0]) ;
return -1;
}
else
{
/*
*no other option is
*available now, so this is
*a bit redundant...
*/
display_usage ((unsigned char*)argv[0]) ;
}
}
if (i > argc)
{
/*
*no file name has been given
*in parameter, go out.
*/
return -1 ;
}
/****************************************
*Now, the real libcroco related stuffs...
****************************************/
file_path = (unsigned char*)argv[i] ;
/*
*Instanciate the libcroco parser.
*/
parser = cr_parser_new_from_file (file_path,
CR_ASCII) ;
if (!parser)
{
/*
*Damned, something bad happened ...
*/
return -1;
}
/*
*Instanciates the SAC document handler.
*/
sac_handler = cr_doc_handler_new () ;
if (!sac_handler)
{
/*
*Argh, something bad happened here :-\
*Let's release the resources we allocated
*and let's get out.
*/
cr_parser_destroy (parser) ;
return -1;
}
/******************
*Sets some of the sac document handlers.
****************/
/*
*This sac handler callback function will get called by the parser
*each time it encounters the beginning of a ruleset.
*/
sac_handler->start_selector = start_selector_cb ;
/*
*This sac handler callback function will get called by the parser
*each time it encounters the end of a ruleset.
*/
sac_handler->end_selector = end_selector_cb ;
/*
*Let's register our sac handler into the parser.
*/
cr_parser_set_sac_handler (parser, sac_handler) ;
/*
*Now, let's do the parsing !!!
*/
cr_parser_parse (parser) ;
/*******************************************************
*End of the parsing. A lot of sentences begining with "Hey"
*may have been printed on the screen...
***********************************************/
/*
*Time to free the resources we allocated.
*/
cr_parser_destroy (parser) ;
cr_doc_handler_unref (sac_handler) ;
return 0 ;
}
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