src/plugins/litehtml_viewer/container_linux.h

   1 /*
   2  * Claws Mail -- A GTK+ based, lightweight, and fast e-mail client
   3  * Copyright(C) 2019 the Claws Mail Team
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 3 of the License, or
   8  * (at your option) any later version.
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  12  * GNU General Public License for more details.
  13  * You should have received a copy of the GNU General Public License
  14  * along with this program; if not, write tothe Free Software
  15  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  16  */
  17
  18 #pragma once
  19
  20 #include <vector>
  21 #include <list>
  22 #include <string>
  23
  24 #include <cairo.h>
  25 #include <gtk/gtk.h>
  26 #include <fontconfig/fontconfig.h>
  27
  28 #include "litehtml/litehtml.h"
  29
  30 struct cairo_clip_box
  31 {
  32         typedef std::vector<cairo_clip_box> vector;
  33         litehtml::position      box;
  34         litehtml::border_radiuses radius;
  35
  36         cairo_clip_box(const litehtml::position& vBox, litehtml::border_radiuses vRad)
  37         {
  38                 box = vBox;
  39                 radius = vRad;
  40         }
  41
  42         cairo_clip_box(const cairo_clip_box& val)
  43         {
  44                 box = val.box;
  45                 radius = val.radius;
  46         }
  47         cairo_clip_box& operator=(const cairo_clip_box& val)
  48         {
  49                 box = val.box;
  50                 radius = val.radius;
  51                 return *this;
  52         }
  53 };
  54
  55 class container_linux : public litehtml::document_container
  56 {
  57         typedef std::pair<litehtml::tstring, GdkPixbuf*> image;
  58         typedef std::list<image> images_map;
  59
  60 protected:
  61         cairo_surface_t*                        m_temp_surface;
  62         cairo_t*                                        m_temp_cr;
  63         images_map                                      m_images;
  64         GRecMutex                                       m_images_lock;
  65         cairo_clip_box::vector                          m_clips;
  66
  67 public:
  68         container_linux(void);
  69         virtual ~container_linux(void);
  70
  71         virtual int                                             pt_to_px(int pt) override;
  72         virtual void                                            load_image(const litehtml::tchar_t* src, const litehtml::tchar_t* baseurl, bool redraw_on_ready) override;
  73         virtual void                                            get_image_size(const litehtml::tchar_t* src, const litehtml::tchar_t* baseurl, litehtml::size& sz) override;
  74         virtual void                                            draw_background(litehtml::uint_ptr hdc, const litehtml::background_paint& bg) override;
  75         virtual void                                            draw_borders(litehtml::uint_ptr hdc, const litehtml::borders& borders, const litehtml::position& draw_pos, bool root) override;
  76         virtual void                                            draw_list_marker(litehtml::uint_ptr hdc, const litehtml::list_marker& marker) override;
  77         virtual std::shared_ptr<litehtml::element>      create_element(const litehtml::tchar_t *tag_name,
  78                                                                                                                                  const litehtml::string_map &attributes,
  79                                                                                                                                  const std::shared_ptr<litehtml::document> &doc) override;
  80         virtual void                                            get_media_features(litehtml::media_features& media) const override;
  81         virtual void                                            get_language(litehtml::tstring& language, litehtml::tstring & culture) const override;
  82         virtual void                                            link(const std::shared_ptr<litehtml::document> &ptr, const litehtml::element::ptr& el) override;
  83
  84
  85         virtual void                                            transform_text(litehtml::tstring& text, litehtml::text_transform tt) override;
  86         virtual void                                            set_clip(const litehtml::position& pos, const litehtml::border_radiuses& bdr_radius, bool valid_x, bool valid_y) override;
  87         virtual void                                            del_clip() override;
  88
  89         virtual void                                            make_url( const litehtml::tchar_t* url, const litehtml::tchar_t* basepath, litehtml::tstring& out );
  90         virtual GdkPixbuf       *get_image(const litehtml::tchar_t* url, bool redraw_on_ready) = 0;
  91
  92         void                                                            clear_images();
  93
  94         /* Trim down images cache to less than desired_size [bytes],
  95          * starting from oldest stored. */
  96         gint                                                            clear_images(gint desired_size);
  97
  98 protected:
  99         virtual void                                            draw_ellipse(cairo_t* cr, int x, int y, int width, int height, const litehtml::web_color& color, int line_width);
 100         virtual void                                            fill_ellipse(cairo_t* cr, int x, int y, int width, int height, const litehtml::web_color& color);
 101         virtual void                                            rounded_rectangle( cairo_t* cr, const litehtml::position &pos, const litehtml::border_radiuses &radius );
 102         void                                                            apply_clip(cairo_t* cr);
 103         void                                                            set_color(cairo_t* cr, litehtml::web_color color)       { cairo_set_source_rgba(cr, color.red / 255.0, color.green / 255.0, color.blue / 255.0, color.alpha / 255.0); }
 104
 105 private:
 106         void                                                            add_path_arc(cairo_t* cr, double x, double y, double rx, double ry, double a1, double a2, bool neg);
 107         void                                                            draw_pixbuf(cairo_t* cr, const GdkPixbuf *bmp, int x, int y, int cx, int cy);
 108         cairo_surface_t*                                        surface_from_pixbuf(const GdkPixbuf *bmp);
 109         void lock_images_cache(void);
 110         void unlock_images_cache(void);
 111 };