document_container.h

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#ifndef LH_DOCUMENT_CONTAINER_H
#define LH_DOCUMENT_CONTAINER_H
 
#include "os_types.h"
#include "types.h"
#include "web_color.h"
#include "background.h"
#include "borders.h"
#include "element.h"
#include <memory>
#include <functional>
 
namespace litehtml
{
    struct list_marker
    {
        string          image;
        const char*     baseurl;
        list_style_type marker_type;
        web_color       color;
        position        pos;
        int             index;
        uint_ptr        font;
    };
    
    enum mouse_event
    {
        mouse_event_enter,
        mouse_event_leave,
    };
 
    // call back interface to draw text, images and other elements
    class document_container
    {
    public:
        virtual litehtml::uint_ptr  create_font(const char* faceName, int size, int weight, litehtml::font_style italic, unsigned int decoration, litehtml::font_metrics* fm) = 0;
        virtual void                delete_font(litehtml::uint_ptr hFont) = 0;
        virtual int                 text_width(const char* text, litehtml::uint_ptr hFont) = 0;
        virtual void                draw_text(litehtml::uint_ptr hdc, const char* text, litehtml::uint_ptr hFont, litehtml::web_color color, const litehtml::position& pos) = 0;
        virtual int                 pt_to_px(int pt) const = 0;
        virtual int                 get_default_font_size() const = 0;
        virtual const char*         get_default_font_name() const = 0;
        virtual void                draw_list_marker(litehtml::uint_ptr hdc, const litehtml::list_marker& marker) = 0;
        virtual void                load_image(const char* src, const char* baseurl, bool redraw_on_ready) = 0;
        virtual void                get_image_size(const char* src, const char* baseurl, litehtml::size& sz) = 0;
        virtual void                draw_image(litehtml::uint_ptr hdc, const background_layer& layer, const std::string& url, const std::string& base_url) = 0;
        virtual void                draw_solid_fill(litehtml::uint_ptr hdc, const background_layer& layer, const web_color& color) = 0;
        virtual void                draw_linear_gradient(litehtml::uint_ptr hdc, const background_layer& layer, const background_layer::linear_gradient& gradient) = 0;
        virtual void                draw_radial_gradient(litehtml::uint_ptr hdc, const background_layer& layer, const background_layer::radial_gradient& gradient) = 0;
        virtual void                draw_conic_gradient(litehtml::uint_ptr hdc, const background_layer& layer, const background_layer::conic_gradient& gradient) = 0;
        virtual void                draw_borders(litehtml::uint_ptr hdc, const litehtml::borders& borders, const litehtml::position& draw_pos, bool root) = 0;
 
        virtual void                set_caption(const char* caption) = 0;
        virtual void                set_base_url(const char* base_url) = 0;
        virtual void                link(const std::shared_ptr<litehtml::document>& doc, const litehtml::element::ptr& el) = 0;
        virtual void                on_anchor_click(const char* url, const litehtml::element::ptr& el) = 0;
        virtual void                on_mouse_event(const litehtml::element::ptr& el, litehtml::mouse_event event) = 0;
        virtual void                set_cursor(const char* cursor) = 0;
        virtual void                transform_text(litehtml::string& text, litehtml::text_transform tt) = 0;
        virtual void                import_css(litehtml::string& text, const litehtml::string& url, litehtml::string& baseurl) = 0;
        virtual void                set_clip(const litehtml::position& pos, const litehtml::border_radiuses& bdr_radius) = 0;
        virtual void                del_clip() = 0;
        virtual void                get_client_rect(litehtml::position& client) const = 0;
        virtual litehtml::element::ptr  create_element( const char* tag_name,
                                                        const litehtml::string_map& attributes,
                                                        const std::shared_ptr<litehtml::document>& doc) = 0;
 
        virtual void                get_media_features(litehtml::media_features& media) const = 0;
        virtual void                get_language(litehtml::string& language, litehtml::string& culture) const = 0;
        virtual litehtml::string    resolve_color(const litehtml::string& /*color*/) const { return litehtml::string(); }
        virtual void                split_text(const char* text, const std::function<void(const char*)>& on_word, const std::function<void(const char*)>& on_space);
 
    protected:
        virtual ~document_container() = default;
    };
}
 
#endif  // LH_DOCUMENT_CONTAINER_H