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Diffstat (limited to 'src/3rdparty/libcroco/docs/examples/sac-example-1.c')
-rw-r--r-- | src/3rdparty/libcroco/docs/examples/sac-example-1.c | 198 |
1 files changed, 198 insertions, 0 deletions
diff --git a/src/3rdparty/libcroco/docs/examples/sac-example-1.c b/src/3rdparty/libcroco/docs/examples/sac-example-1.c new file mode 100644 index 0000000..074fc07 --- /dev/null +++ b/src/3rdparty/libcroco/docs/examples/sac-example-1.c @@ -0,0 +1,198 @@ +/* -*- 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 -Wall -o sac-example-1 `croco-0.6-config --cflags` `croco-0.6-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 <string.h> +#include <libcroco/libcroco.h> + +/** + *This is a callback function that will + *be called at the beginning 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 beginning 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] ; + + /* + *Instantiate the libcroco parser. + */ + parser = cr_parser_new_from_file (file_path, + CR_ASCII) ; + if (!parser) + { + /* + *Damned, something bad happened ... + */ + return -1; + } + + /* + *Instantiates 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 beginning 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 ; +} |