Modest/examples/modest/css_property_to_node.c

/*
 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 <modest/modest.h>
#include <modest/finder/finder.h>
#include <modest/finder/thread.h>
#include <modest/glue.h>
#include <modest/node/serialization.h>
#include <myhtml/serialization.h>

#define DIE(msg, ...) do { fprintf(stderr, msg, ##__VA_ARGS__); exit(EXIT_FAILURE); } while(0)
#define check_status(msg, ...) do {if(status) DIE(msg, ##__VA_ARGS__);} while(0)

myhtml_tree_t * parse_html(const char* data, size_t data_size, myhtml_callback_tree_node_f cai, void* cai_ctx)
{
    myhtml_t* myhtml = myhtml_create();
    mystatus_t status = myhtml_init(myhtml, MyHTML_OPTIONS_DEFAULT, 1, 0);
    
    check_status("Can't init MyHTML object\n");
    
    myhtml_tree_t* tree = myhtml_tree_create();
    status = myhtml_tree_init(tree, myhtml);
    
    check_status("Can't init MyHTML Tree object\n");
    
    myhtml_callback_tree_node_insert_set(tree, cai, cai_ctx);
    
    status = myhtml_parse(tree, MyENCODING_UTF_8, data, data_size);
    check_status("Can't parse HTML:\n%s\n", data);
    
    return tree;
}

mycss_entry_t * parse_css(const char* data, size_t data_size)
{
    // base init
    mycss_t *mycss = mycss_create();
    mystatus_t status = mycss_init(mycss);
    
    check_status("Can't init MyCSS object\n");
    
    // currenr entry work init
    mycss_entry_t *entry = mycss_entry_create();
    status = mycss_entry_init(mycss, entry);
    
    check_status("Can't init MyCSS Entry object\n");
    
    status = mycss_parse(entry, MyENCODING_UTF_8, data, data_size);
    check_status("Can't parse CSS:\n%s\n", data);
    
    return entry;
}

void serialization_callback(const char* data, size_t len, void* ctx)
{
    printf("%.*s", (int)len, data);
}

void print_result(modest_t* modest, myhtml_tree_t* myhtml_tree, myhtml_tree_node_t* scope_node, mycss_entry_t *mycss_entry)
{
    myhtml_tree_node_t* node = scope_node;
    
    /* traversal of the tree without recursion */
    while(node) {
        modest_node_t *m_node = (modest_node_t*)node->data;
        myhtml_serialization_node_callback(node, serialization_callback, NULL);
        
        if(m_node) {
            printf(": {");
            
            modest_node_raw_serialization(modest, m_node, serialization_callback, NULL);
            
            printf("}\n");
        }
        
        if(node->child)
            node = node->child;
        else {
            while(node != scope_node && node->next == NULL)
                node = node->parent;
            
            if(node == scope_node)
                break;
            
            node = node->next;
        }
    }
}

int main(int argc, const char * argv[])
{
    char *html = "<div id=div1></div><div id=div2></div><div id=div3></div><div id=div4></div>";
    char *css = "div {display: inline; padding: 130px 3em;}";
    
    /* init Modest */
    modest_t *modest = modest_create();
    mystatus_t status = modest_init(modest);
    
    check_status("Can't init Modest object\n");
    
    /* parse HTML, CSS */
    modest->myhtml_tree = parse_html(html, strlen(html), modest_glue_callback_myhtml_insert_node, (void*)modest);
    modest->mycss_entry = parse_css(css, strlen(css));
    
    /* get stylesheet */
    mycss_stylesheet_t *stylesheet = mycss_entry_stylesheet(modest->mycss_entry);
    
    /* crteate and init Finder */
    modest_finder_t* finder = modest_finder_create();
    status = modest_finder_init(finder);
    
    check_status("Can't init Modest Finder object\n");
    
    /* create and init Thread Finder with two thread */
    modest_finder_thread_t *finder_thread = modest_finder_thread_create();
    modest_finder_thread_init(finder, finder_thread, 2);
    
    /* comparison selectors and tree nodes */
    status = modest_finder_thread_process(modest, finder_thread, modest->myhtml_tree->node_html, stylesheet->sel_list_first);
    
    check_status("Can't find by selectors with thread\n");
    
    /* print result */
    /* print selector */
    printf("Incoming stylesheet:\n\t");
    mycss_stylesheet_serialization(stylesheet, serialization_callback, NULL);
    printf("\n\n");
    
    /* print trees */
    printf("Incoming tree:\n\t");
    myhtml_serialization_tree_callback(modest->myhtml_tree->node_html, serialization_callback, NULL);
    
    /* print nodes with style */
    printf("\n\nResult:\n");
    print_result(modest, modest->myhtml_tree, modest->myhtml_tree->node_html, modest->mycss_entry);
    
    /* destroy all */
    /* destroy Finder and Threads */
    modest_finder_thread_destroy(finder_thread, true);
    modest_finder_destroy(finder, true);
    
    /* destroy Stylesheet */
    mycss_stylesheet_destroy(stylesheet, true);
    
    /* destroy MyHTML */
    myhtml_t* myhtml = modest->myhtml_tree->myhtml;
    myhtml_tree_destroy(modest->myhtml_tree);
    myhtml_destroy(myhtml);
    
    /* destroy MyCSS */
    mycss_t* mycss = modest->mycss_entry->mycss;
    mycss_entry_destroy(modest->mycss_entry, true);
    mycss_destroy(mycss, true);
    
    /* destroy Modest */
    modest_destroy(modest, true);
    
    return 0;
}