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#ifndef LH_STYLE_H
#define LH_STYLE_H
#include "background.h"
#include "css_length.h"
#include "css_position.h"
#include "css_tokenizer.h"
#include "gradient.h"
#include "web_color.h"
namespace litehtml
{
struct invalid {}; // indicates "not found" condition in style::get_property
struct inherit {}; // "inherit" was specified as the value of this property
struct property_value : variant<
invalid,
inherit,
int,
int_vector,
css_length,
length_vector,
float,
web_color,
vector<image>,
string,
string_vector,
size_vector,
css_token_vector
>
{
bool m_important = false;
bool m_has_var = false; // css_token_vector, parsing is delayed because of var()
property_value() {}
template<class T> property_value(const T& val, bool important, bool has_var = false)
: base(val), m_important(important), m_has_var(has_var) {}
};
class html_tag;
typedef std::map<string_id, property_value> props_map;
// represents a style block, eg. "color: black; display: inline"
class style
{
public:
typedef std::shared_ptr<style> ptr;
typedef std::vector<style::ptr> vector;
private:
props_map m_properties;
static std::map<string_id, string> m_valid_values;
public:
void add(const css_token_vector& tokens, const string& baseurl = "", document_container* container = nullptr);
void add(const string& txt, const string& baseurl = "", document_container* container = nullptr);
void add_property(string_id name, const css_token_vector& tokens, const string& baseurl = "", bool important = false, document_container* container = nullptr);
void add_property(string_id name, const string& val, const string& baseurl = "", bool important = false, document_container* container = nullptr);
const property_value& get_property(string_id name) const;
void combine(const style& src);
void clear()
{
m_properties.clear();
}
void subst_vars(const html_tag* el);
private:
void inherit_property(string_id name, bool important);
void parse_background(const css_token_vector& tokens, const string& baseurl, bool important, document_container* container);
bool parse_bg_layer(const css_token_vector& tokens, document_container* container, background& bg, bool final_layer);
// parse the value of background-image property, which is comma-separated list of <bg-image>s
void parse_background_image(const css_token_vector& tokens, const string& baseurl, bool important, document_container* container);
// parse comma-separated list of keywords
void parse_keyword_comma_list(string_id name, const css_token_vector& tokens, bool important);
void parse_background_position(const css_token_vector& tokens, bool important);
void parse_background_size(const css_token_vector& tokens, bool important);
void parse_border(const css_token_vector& tokens, bool important, document_container* container);
void parse_border_side(string_id name, const css_token_vector& tokens, bool important, document_container* container);
void parse_border_radius(const css_token_vector& tokens, bool important);
bool parse_list_style_image(const css_token& tok, string& url);
void parse_list_style(const css_token_vector& tokens, string baseurl, bool important);
void parse_font(css_token_vector tokens, bool important);
void parse_text_decoration(const css_token_vector& tokens, bool important, document_container* container);
bool parse_text_decoration_color(const css_token& token, bool important, document_container* container);
void parse_text_decoration_line(const css_token_vector& tokens, bool important);
void parse_text_emphasis(const css_token_vector& tokens, bool important, document_container* container);
bool parse_text_emphasis_color(const css_token& token, bool important, document_container* container);
void parse_text_emphasis_position(const css_token_vector& tokens, bool important);
void parse_flex_flow(const css_token_vector& tokens, bool important);
void parse_flex(const css_token_vector& tokens, bool important);
void parse_align_self(string_id name, const css_token_vector& tokens, bool important);
void add_parsed_property(string_id name, const property_value& propval);
void add_length_property(string_id name, css_token val, string keywords, int options, bool important);
template<class T> void add_four_properties(string_id top_name, T val[4], int n, bool important);
void remove_property(string_id name, bool important);
};
bool parse_url(const css_token& token, string& url);
bool parse_length(const css_token& tok, css_length& length, int options, string keywords = "");
bool parse_angle(const css_token& tok, float& angle, bool percents_allowed = false);
bool parse_bg_position(const css_token_vector& tokens, int& index, css_length& x, css_length& y, bool convert_keywords_to_percents);
template<typename Enum>
bool parse_keyword(const css_token& tok, Enum& val, string keywords, int first_keyword_value = 0)
{
int value_index(const string& val, const string& strings, int defValue = -1, char delim = ';');
int idx = value_index(tok.ident(), keywords);
if (idx == -1) return false;
val = (Enum)(first_keyword_value + idx);
return true;
}
} // namespace litehtml
#endif // LH_STYLE_H
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