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/*
Copyright (C) 2016 Alexander Borisov
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
Author: lex.borisov@gmail.com (Alexander Borisov)
*/
#include <stdio.h>
#include <stdlib.h>
#include <myhtml/api.h>
#include "example.h"
struct res_html {
char *html;
size_t size;
};
struct res_html load_html_file(const char* filename)
{
FILE *fh = fopen(filename, "rb");
if(fh == NULL) {
fprintf(stderr, "Can't open html file: %s\n", filename);
exit(EXIT_FAILURE);
}
if(fseek(fh, 0L, SEEK_END) != 0) {
fprintf(stderr, "Can't set position (fseek) in file: %s\n", filename);
exit(EXIT_FAILURE);
}
long size = ftell(fh);
if(fseek(fh, 0L, SEEK_SET) != 0) {
fprintf(stderr, "Can't set position (fseek) in file: %s\n", filename);
exit(EXIT_FAILURE);
}
if(size <= 0) {
fprintf(stderr, "Can't get file size or file is empty: %s\n", filename);
exit(EXIT_FAILURE);
}
char *html = (char*)malloc(size + 1);
if(html == NULL) {
fprintf(stderr, "Can't allocate mem for html file: %s\n", filename);
exit(EXIT_FAILURE);
}
size_t nread = fread(html, 1, size, fh);
if (nread != size) {
fprintf(stderr, "could not read %ld bytes (" MyCORE_FMT_Z " bytes done)\n", size, nread);
exit(EXIT_FAILURE);
}
fclose(fh);
struct res_html res = {html, (size_t)size};
return res;
}
void print_node_attr(myhtml_tree_node_t *node)
{
myhtml_tree_attr_t *attr = myhtml_node_attribute_first(node);
while (attr) {
const char *name = myhtml_attribute_key(attr, NULL);
if(name) {
printf(" %s", name);
const char *value = myhtml_attribute_value(attr, NULL);
if(value)
printf("=\"%s\"", value);
}
attr = myhtml_attribute_next(attr);
}
}
void print_tree(myhtml_tree_t* tree, myhtml_tree_node_t *node, size_t inc)
{
while (node)
{
for(size_t i = 0; i < inc; i++)
printf("\t");
// print current element
const char *tag_name = myhtml_tag_name_by_id(tree, myhtml_node_tag_id(node), NULL);
if(tag_name)
printf("<%s", tag_name);
else
// it can not be
printf("<!something is wrong!");
// print node attributes
print_node_attr(node);
if(myhtml_node_is_close_self(node))
printf(" /");
myhtml_tag_id_t tag_id = myhtml_node_tag_id(node);
if(tag_id == MyHTML_TAG__TEXT || tag_id == MyHTML_TAG__COMMENT) {
const char* node_text = myhtml_node_text(node, NULL);
printf(">: %s\n", node_text);
}
else {
printf(">\n");
}
// print children
print_tree(tree, myhtml_node_child(node), (inc + 1));
node = myhtml_node_next(node);
}
}
int main(int argc, const char * argv[])
{
const char* path;
if (argc == 2) {
path = argv[1];
}
else {
printf("Bad ARGV!\nUse: print_tree_high_level <path_to_html_file>\n");
exit(EXIT_FAILURE);
}
struct res_html res = load_html_file(path);
// basic init
myhtml_t* myhtml = myhtml_create();
myhtml_init(myhtml, MyHTML_OPTIONS_DEFAULT, 1, 0);
// init tree
myhtml_tree_t* tree = myhtml_tree_create();
myhtml_tree_init(tree, myhtml);
// parse html
myhtml_parse(tree, MyENCODING_UTF_8, res.html, res.size);
// print tree
myhtml_tree_node_t *node = myhtml_tree_get_document(tree);
print_tree(tree, myhtml_node_child(node), 0);
// release resources
myhtml_tree_destroy(tree);
myhtml_destroy(myhtml);
free(res.html);
return 0;
}
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