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#ifndef LH_CSS_LENGTH_H
#define LH_CSS_LENGTH_H
#include "types.h"
#include "css_tokenizer.h"
namespace litehtml
{
// from_token options (flags)
enum {
f_length = 1, // <length> (includes unitless zero)
f_percentage = 2, // <percentage>
f_length_percentage = f_length | f_percentage, // <length-percentage>
f_number = 4, // <number>
f_integer = 8, // <integer>
f_positive = 16 // ⩾0 (non-negative)
};
// <length> | <percentage> | <number> | auto | none | normal
// https://developer.mozilla.org/en-US/docs/Web/CSS/length
class css_length
{
union
{
float m_value;
int m_predef;
};
css_units m_units;
bool m_is_predefined;
public:
css_length();
css_length(float val, css_units units = css_units_px);
css_length& operator=(float val);
bool is_predefined() const;
void predef(int val);
int predef() const;
static css_length predef_value(int val = 0);
void set_value(float val, css_units units);
float val() const;
css_units units() const;
int calc_percent(int width) const;
bool from_token(const css_token& token, int options, const string& predefined_keywords = "");
string to_string() const;
};
using length_vector = vector<css_length>;
// css_length inlines
inline css_length::css_length()
{
m_value = 0;
m_predef = 0;
m_units = css_units_none;
m_is_predefined = false;
}
inline css_length::css_length(float val, css_units units)
{
m_value = val;
m_units = units;
m_is_predefined = false;
}
inline css_length& css_length::operator=(float val)
{
m_value = val;
m_units = css_units_px;
m_is_predefined = false;
return *this;
}
inline bool css_length::is_predefined() const
{
return m_is_predefined;
}
inline void css_length::predef(int val)
{
m_predef = val;
m_is_predefined = true;
}
inline int css_length::predef() const
{
if(m_is_predefined)
{
return m_predef;
}
return 0;
}
inline void css_length::set_value(float val, css_units units)
{
m_value = val;
m_is_predefined = false;
m_units = units;
}
inline float css_length::val() const
{
if(!m_is_predefined)
{
return m_value;
}
return 0;
}
inline css_units css_length::units() const
{
return m_units;
}
inline int css_length::calc_percent(int width) const
{
if(!is_predefined())
{
if(units() == css_units_percentage)
{
return (int) ((double) width * (double) m_value / 100.0);
} else
{
return (int) val();
}
}
return 0;
}
}
#endif // LH_CSS_LENGTH_H
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