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/*
Copyright (C) 2015-2016 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 colorize_print(mycore_incoming_buffer_t *inc_buf, size_t begin, size_t length, const char* color)
{
if(length) {
inc_buf = mycore_incoming_buffer_find_by_position(inc_buf, begin);
size_t between_begin = (begin - mycore_incoming_buffer_offset(inc_buf));
const char* between_data = mycore_incoming_buffer_data(inc_buf);
printf("%s%.*s\e[0m", color, (int)length, &between_data[between_begin]);
}
}
size_t colorize_print_attributes(myhtml_tree_t* tree, myhtml_tree_attr_t* attr, mycore_incoming_buffer_t *inc_buf, size_t last_pos)
{
while(attr)
{
myhtml_position_t key_pos = myhtml_attribute_key_raw_position(attr);
myhtml_position_t value_pos = myhtml_attribute_value_raw_position(attr);
if(key_pos.length)
{
/* print <div[ ]key=value> */
if(last_pos < key_pos.begin)
colorize_print(inc_buf, last_pos, (key_pos.begin - last_pos), "\e[31m");
/* print <div [key]=value> */
colorize_print(inc_buf, key_pos.begin, key_pos.length, "\e[33m");
/* get/check max position */
if((key_pos.begin + key_pos.length) > last_pos)
last_pos = key_pos.begin + key_pos.length;
}
else {
/* print <div[ ]value> */
if(value_pos.length && last_pos < value_pos.begin)
colorize_print(inc_buf, last_pos, (value_pos.begin - last_pos), "\e[31m");
}
if(value_pos.length)
{
/* print <div key[=]value> */
if(key_pos.length) {
size_t between_begin = key_pos.begin + key_pos.length;
colorize_print(inc_buf, between_begin, (value_pos.begin - between_begin), "\e[31m");
}
/* print <div key=[value]> */
colorize_print(inc_buf, value_pos.begin, value_pos.length, "\e[34m");
/* get/check max position */
if(value_pos.begin + value_pos.length > last_pos)
last_pos = value_pos.begin + value_pos.length;
}
attr = myhtml_attribute_next(attr);
}
return last_pos;
}
void * colorize_callback_before_token_done(myhtml_tree_t* tree, myhtml_token_node_t* token, void* ctx)
{
mycore_incoming_buffer_t *inc_buf = myhtml_tree_incoming_buffer_first(tree);
myhtml_position_t token_pos = myhtml_token_node_raw_pasition(token);
myhtml_position_t token_element_pos = myhtml_token_node_element_pasition(token);
size_t last_pos = token_pos.begin + token_pos.length;
switch (myhtml_token_node_tag_id(token)) {
case MyHTML_TAG__DOCTYPE: {
/* print [<!DOCTYPE] */
colorize_print(inc_buf, token_element_pos.begin, (token_pos.begin - token_element_pos.begin), "\e[37m");
colorize_print(inc_buf, token_pos.begin, token_pos.length, "\e[37m");
/* print [>] */
colorize_print(inc_buf, last_pos, ((token_element_pos.begin + token_element_pos.length) - last_pos), "\e[37m");
break;
}
case MyHTML_TAG__TEXT: {
colorize_print(inc_buf, token_pos.begin, token_pos.length, "\e[0m");
break;
}
case MyHTML_TAG__COMMENT: {
/* print [<!--] */
colorize_print(inc_buf, token_element_pos.begin, (token_pos.begin - token_element_pos.begin), "\e[32m");
colorize_print(inc_buf, token_pos.begin, token_pos.length, "\e[32m");
/* print [-->] */
colorize_print(inc_buf, last_pos, ((token_element_pos.begin + token_element_pos.length) - last_pos), "\e[32m");
break;
}
default: {
/* print [<]div> */
colorize_print(inc_buf, token_element_pos.begin, (token_pos.begin - token_element_pos.begin), "\e[31m");
/* print <[div]> */
colorize_print(inc_buf, token_pos.begin, token_pos.length, "\e[31m");
if(myhtml_token_node_attribute_first(token))
last_pos = colorize_print_attributes(tree, myhtml_token_node_attribute_first(token), inc_buf, last_pos);
/* print <div[>] */
colorize_print(inc_buf, last_pos, ((token_element_pos.begin + token_element_pos.length) - last_pos), "\e[31m");
break;
}
}
return ctx;
}
int main(int argc, const char * argv[])
{
const char* path;
if (argc == 2) {
path = argv[1];
}
else {
printf("Bad ARGV!\nUse: tokenizer_colorize_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);
myhtml_callback_before_token_done_set(tree, colorize_callback_before_token_done, NULL);
// parse html
myhtml_parse(tree, MyENCODING_UTF_8, res.html, res.size);
printf("\n");
myhtml_tree_destroy(tree);
myhtml_destroy(myhtml);
free(res.html);
return 0;
}
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