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#include "html.h"
#include "stylesheet.h"
#include <algorithm>
#include "document.h"
void litehtml::css::parse_stylesheet(const char* str, const char* baseurl, const std::shared_ptr<document>& doc, const media_query_list::ptr& media)
{
string text = str;
// remove comments
string::size_type c_start = text.find("/*");
while(c_start != string::npos)
{
string::size_type c_end = text.find("*/", c_start + 2);
if(c_end == string::npos)
{
text.erase(c_start);
break;
}
text.erase(c_start, c_end - c_start + 2);
c_start = text.find("/*");
}
string::size_type pos = text.find_first_not_of(" \n\r\t");
while(pos != string::npos)
{
while(pos != string::npos && text[pos] == '@')
{
string::size_type sPos = pos;
pos = text.find_first_of("{;", pos);
if(pos != string::npos && text[pos] == '{')
{
pos = find_close_bracket(text, pos, '{', '}');
}
if(pos != string::npos)
{
parse_atrule(text.substr(sPos, pos - sPos + 1), baseurl, doc, media);
} else
{
parse_atrule(text.substr(sPos), baseurl, doc, media);
}
if(pos != string::npos)
{
pos = text.find_first_not_of(" \n\r\t", pos + 1);
}
}
if(pos == string::npos)
{
break;
}
string::size_type style_start = text.find('{', pos);
string::size_type style_end = text.find('}', pos);
if(style_start != string::npos && style_end != string::npos)
{
auto str_style = text.substr(style_start + 1, style_end - style_start - 1);
style::ptr style = std::make_shared<litehtml::style>();
style->add(str_style, baseurl ? baseurl : "", doc->container());
parse_selectors(text.substr(pos, style_start - pos), style, media);
if(media && doc)
{
doc->add_media_list(media);
}
pos = style_end + 1;
} else
{
pos = string::npos;
}
if(pos != string::npos)
{
pos = text.find_first_not_of(" \n\r\t", pos);
}
}
}
void litehtml::css::parse_css_url( const string& str, string& url )
{
url = "";
size_t pos1 = str.find('(');
size_t pos2 = str.find(')');
if(pos1 != string::npos && pos2 != string::npos)
{
url = str.substr(pos1 + 1, pos2 - pos1 - 1);
if(url.length())
{
if(url[0] == '\'' || url[0] == '"')
{
url.erase(0, 1);
}
}
if(url.length())
{
if(url[url.length() - 1] == '\'' || url[url.length() - 1] == '"')
{
url.erase(url.length() - 1, 1);
}
}
}
}
bool litehtml::css::parse_selectors( const string& txt, const style::ptr& styles, const media_query_list::ptr& media )
{
string selector = txt;
trim(selector);
string_vector tokens;
split_string(selector, tokens, ",");
bool added_something = false;
for(auto & token : tokens)
{
css_selector::ptr new_selector = std::make_shared<css_selector>(media);
new_selector->m_style = styles;
trim(token);
if(new_selector->parse(token))
{
new_selector->calc_specificity();
add_selector(new_selector);
added_something = true;
}
}
return added_something;
}
void litehtml::css::sort_selectors()
{
std::sort(m_selectors.begin(), m_selectors.end(),
[](const css_selector::ptr& v1, const css_selector::ptr& v2)
{
return (*v1) < (*v2);
}
);
}
void litehtml::css::parse_atrule(const string& text, const char* baseurl, const std::shared_ptr<document>& doc, const media_query_list::ptr& media)
{
if(text.substr(0, 7) == "@import")
{
int sPos = 7;
string iStr;
iStr = text.substr(sPos);
if(iStr[iStr.length() - 1] == ';')
{
iStr.erase(iStr.length() - 1);
}
trim(iStr);
string_vector tokens;
split_string(iStr, tokens, " ", "", "(\"");
if(!tokens.empty())
{
string url;
parse_css_url(tokens.front(), url);
if(url.empty())
{
url = tokens.front();
}
tokens.erase(tokens.begin());
if(doc)
{
document_container* doc_cont = doc->container();
if(doc_cont)
{
string css_text;
string css_baseurl;
if(baseurl)
{
css_baseurl = baseurl;
}
doc_cont->import_css(css_text, url, css_baseurl);
if(!css_text.empty())
{
media_query_list::ptr new_media = media;
if(!tokens.empty())
{
string media_str;
for(auto iter = tokens.begin(); iter != tokens.end(); iter++)
{
if(iter != tokens.begin())
{
media_str += " ";
}
media_str += (*iter);
}
new_media = media_query_list::create_from_string(media_str, doc);
if(!new_media)
{
new_media = media;
}
}
parse_stylesheet(css_text.c_str(), css_baseurl.c_str(), doc, new_media);
}
}
}
}
} else if(text.substr(0, 6) == "@media")
{
string::size_type b1 = text.find_first_of('{');
string::size_type b2 = text.find_last_of('}');
if(b1 != string::npos)
{
string media_type = text.substr(6, b1 - 6);
trim(media_type);
media_query_list::ptr new_media = media_query_list::create_from_string(media_type, doc);
string media_style;
if(b2 != string::npos)
{
media_style = text.substr(b1 + 1, b2 - b1 - 1);
} else
{
media_style = text.substr(b1 + 1);
}
parse_stylesheet(media_style.c_str(), baseurl, doc, new_media);
}
}
}
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