fix bug 4483, 'cannot open certain links anymore'
[claws.git] / 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
91         void                                                            clear_images();
92
93         /* Trim down images cache to less than desired_size [bytes],
94          * starting from oldest stored. */
95         gint                                                            clear_images(gint desired_size);
96
97         void                                                            add_image_to_cache(const gchar *url, GdkPixbuf *image);
98         virtual void                            redraw(gboolean force_render) = 0;
99         virtual GdkPixbuf *get_local_image(const litehtml::tstring url) const = 0;
100
101 protected:
102         virtual void                                            draw_ellipse(cairo_t* cr, int x, int y, int width, int height, const litehtml::web_color& color, int line_width);
103         virtual void                                            fill_ellipse(cairo_t* cr, int x, int y, int width, int height, const litehtml::web_color& color);
104         virtual void                                            rounded_rectangle( cairo_t* cr, const litehtml::position &pos, const litehtml::border_radiuses &radius );
105         void                                                            apply_clip(cairo_t* cr);
106         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); }
107
108 private:
109         void                                                            add_path_arc(cairo_t* cr, double x, double y, double rx, double ry, double a1, double a2, bool neg);
110         void                                                            draw_pixbuf(cairo_t* cr, const GdkPixbuf *bmp, int x, int y, int cx, int cy);
111         cairo_surface_t*                                        surface_from_pixbuf(const GdkPixbuf *bmp);
112         void lock_images_cache(void);
113         void unlock_images_cache(void);
114 };