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Diffstat (limited to 'examples/dom-structure-dump.c')
| -rw-r--r-- | examples/dom-structure-dump.c | 234 |
1 files changed, 234 insertions, 0 deletions
diff --git a/examples/dom-structure-dump.c b/examples/dom-structure-dump.c new file mode 100644 index 0000000..fc1b75e --- /dev/null +++ b/examples/dom-structure-dump.c @@ -0,0 +1,234 @@ +/* + * This file is part of LibDOM. + * Licensed under the MIT License, + * http://www.opensource.org/licenses/mit-license.php + * + * Copyright 2010 Michael Drake <tlsa@netsurf-browser.org> + */ + +/* + * Load an html file into libdom with hubbub and print out the dom structure + * + * e.g. <html><body><h1 class="woo">NetSurf</h1> + * <p>NetSurf is <em>awesome</em>!</p> + * <div><h2>Hubbub</h2><p>Hubbub is too.</p> + * <p>Big time.</p></div></body></html> + * + * gives: + * + * HTML + * +-BODY + * | +-H1 class="woo" + * | | +-"NetSurf" + * | +-P + * | | +-"NetSurf is " + * | | +-EM + * | | | +-"awesome" + * | | +-"!" + * | +-DIV + * | | +-H2 + * | | | +-"Hubbub" + * | | +-P + * | | | +-"Hubbub is too." + * | | +-P + * | | | +-"Big time." + * + * + * or maybe just: + * + * HTML + * +-BODY + * | +-H1 class="woo" + * | +-P + * | | +-EM + * | +-DIV + * | | +-H2 + * | | +-P + * | | +-P + * + */ + +#define _GNU_SOURCE /* for strndup */ +#include <assert.h> +#include <stdarg.h> +#include <stdbool.h> +#include <stdio.h> +#include <stdlib.h> +#include <fcntl.h> + +#include <dom/dom.h> +#include <dom/bindings/hubbub/parser.h> + +#define UNUSED(x) ((x)=(x)) + +struct test_data { + int wah; +}; + +dom_document *create_doc_dom_from_file(char *file); + +void *test_realloc(void *ptr, size_t len, void *pw) +{ + UNUSED(pw); + + return realloc(ptr, len); +} + +void test_msg(uint32_t severity, void *ctx, const char *msg, ...) +{ + va_list l; + + UNUSED(ctx); + + va_start(l, msg); + + fprintf(stderr, "%d: ", severity); + vfprintf(stderr, msg, l); + fprintf(stderr, "\n"); +} + +int main(int argc, char **argv) +{ + struct test_data test_data; + lwc_error err; + dom_exception exc; + dom_document *doc = NULL; + dom_element *root = NULL; + dom_string *root_name = NULL; + lwc_string *lwcstr = NULL; + const char *string; + + /* Initialise the DOM library */ + exc = dom_initialise(test_realloc, &test_data); + if (exc != DOM_NO_ERR) { + printf("Failed to initialise DOM library.\n"); + return EXIT_FAILURE; + } + + /* Initialise the string library */ + err = lwc_initialise (test_realloc, NULL, 0); + if (err != lwc_error_ok) { + printf("Failed to initialise string library.\n"); + return EXIT_FAILURE; + } + + /* Load up the input HTML file */ + doc = create_doc_dom_from_file("files/test.html"); + if (doc == NULL) { + printf("Failed to load document.\n"); + return EXIT_FAILURE; + } + + /* Dump DOM structure */ + /* TODO: Actually just root element for now! */ + + /* Get root element */ + exc = dom_document_get_document_element(doc, &root); + if (exc != DOM_NO_ERR) { + printf("Exception raised for get_document_element\n"); + return EXIT_FAILURE; + } else if (root == NULL) { + printf("Broken: root == NULL\n"); + return EXIT_FAILURE; + } + + /* Get root element name */ + exc = dom_node_get_node_name(root, &root_name); + if (exc != DOM_NO_ERR) { + printf("Exception raised for get_node_name\n"); + return EXIT_FAILURE; + } else if (root_name == NULL) { + printf("Broken: root_name == NULL\n"); + return EXIT_FAILURE; + } + + /* Get root element name's lwc_string */ + exc = dom_string_get_intern(root_name, &lwcstr); + if (exc != DOM_NO_ERR) { + printf("Exception raised for string_get_intern\n"); + return EXIT_FAILURE; + } + + /* Get string data and print */ + string = lwc_string_data(lwcstr); + printf("%4s\n", string); + + /* Finalise the DOM library */ + exc = dom_finalise(); + if (exc != DOM_NO_ERR) { + printf("Failed to finalise DOM library.\n"); + return EXIT_FAILURE; + } + + return EXIT_SUCCESS; +} + + + +/** + * Generate a LibDOM document DOM from an HTML file + * + * \param file The file path + */ +dom_document *create_doc_dom_from_file(char *file) +{ + const unsigned int buffer_size = 1024; + dom_hubbub_parser *parser = NULL; + int handle; + int chunk_length; + dom_hubbub_error error; + dom_document *doc; + char buffer[buffer_size]; + + /* Create Hubbub parser */ + parser = dom_hubbub_parser_create("../test/data/Aliases", NULL, true, + test_realloc, NULL, test_msg, NULL); + if (parser == NULL) { + printf("Can't create Hubbub Parser\n"); + return NULL; + } + + /* Open input file */ + handle = open(file, O_RDONLY); + if (handle == -1) { + dom_hubbub_parser_destroy(parser); + printf("Can't open test input file: %s\n", file); + return NULL; + } + + /* Parse input file in chunks */ + chunk_length = buffer_size; + while(chunk_length == buffer_size) { + chunk_length = read(handle, buffer, buffer_size); + error = dom_hubbub_parser_parse_chunk(parser, buffer, + chunk_length); + if (error != DOM_HUBBUB_OK) { + dom_hubbub_parser_destroy(parser); + printf("Parsing errors occur\n"); + return NULL; + } + } + + /* Done parsing file */ + error = dom_hubbub_parser_completed(parser); + if (error != DOM_HUBBUB_OK) { + dom_hubbub_parser_destroy(parser); + printf("Parsing error when construct DOM\n"); + return NULL; + } + + /* Get the document */ + doc = dom_hubbub_parser_get_document(parser); + + /* Finished with parser */ + dom_hubbub_parser_destroy(parser); + + /* Close input file */ + if (close(handle) == -1) { + printf("Can't close test input file: %s\n", file); + return NULL; + } + + return doc; +} + |