mirror of
https://github.com/transmission/transmission
synced 2024-12-25 01:03:01 +00:00
213 lines
4.9 KiB
C++
213 lines
4.9 KiB
C++
/*
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* icons.[ch] written by Paolo Bacchilega, who writes:
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* "There is no problem for me, you can license my code
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* under whatever licence you wish :)"
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*
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*/
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#include <array>
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#include <memory>
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#include <unordered_map>
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#include <glibmm.h>
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#include <giomm.h>
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#include "IconCache.h"
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#include "Utils.h"
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using namespace std::literals;
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Glib::ustring const DirectoryMimeType = "folder"s;
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Glib::ustring const UnknownMimeType = "unknown"s;
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namespace
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{
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auto const VoidPixbufKey = "void-pixbuf"s;
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struct IconCache
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{
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Glib::RefPtr<Gtk::IconTheme> icon_theme;
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int icon_size;
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std::unordered_map<std::string, Glib::RefPtr<Gdk::Pixbuf>> cache;
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};
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std::array<std::unique_ptr<IconCache>, 7> icon_cache;
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Glib::RefPtr<Gdk::Pixbuf> create_void_pixbuf(int width, int height)
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{
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auto const p = Gdk::Pixbuf::create(Gdk::COLORSPACE_RGB, true, 8, width, height);
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p->fill(0xFFFFFF00);
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return p;
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}
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int get_size_in_pixels(Gtk::IconSize icon_size)
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{
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int width = 0;
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int height = 0;
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Gtk::IconSize::lookup(icon_size, width, height);
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return std::max(width, height);
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}
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std::unique_ptr<IconCache> icon_cache_new(Gtk::Widget& for_widget, Gtk::IconSize icon_size)
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{
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auto icons = std::make_unique<IconCache>();
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icons->icon_theme = Gtk::IconTheme::get_for_screen(for_widget.get_screen());
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icons->icon_size = get_size_in_pixels(icon_size);
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icons->cache.try_emplace(VoidPixbufKey, create_void_pixbuf(icons->icon_size, icons->icon_size));
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return icons;
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}
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std::string _icon_cache_get_icon_key(Glib::RefPtr<Gio::Icon> const& icon)
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{
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std::string key;
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if (auto* const ticon = dynamic_cast<Gio::ThemedIcon*>(gtr_get_ptr(icon)); ticon != nullptr)
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{
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std::ostringstream names;
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for (auto const& name : ticon->get_names())
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{
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names << name << ',';
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}
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key = names.str();
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}
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else if (auto* const ficon = dynamic_cast<Gio::FileIcon*>(gtr_get_ptr(icon)); ficon != nullptr)
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{
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key = ficon->get_file()->get_path();
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}
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return key;
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}
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Glib::RefPtr<Gdk::Pixbuf> get_themed_icon_pixbuf(Gio::ThemedIcon& icon, int size, Gtk::IconTheme& icon_theme)
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{
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auto const icon_names = icon.get_names();
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auto icon_info = icon_theme.choose_icon(icon_names, size);
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if (!bool{ icon_info })
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{
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icon_info = icon_theme.lookup_icon("text-x-generic", size, Gtk::ICON_LOOKUP_USE_BUILTIN);
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}
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try
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{
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return icon_info.load_icon();
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}
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catch (Glib::Error const& e)
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{
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g_warning("could not load icon pixbuf: %s\n", e.what().c_str());
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return {};
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}
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}
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Glib::RefPtr<Gdk::Pixbuf> get_file_icon_pixbuf(Gio::FileIcon& icon, int size)
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{
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try
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{
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return Gdk::Pixbuf::create_from_file(icon.get_file()->get_path(), size, -1, false);
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}
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catch (Glib::Error const& e)
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{
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return {};
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}
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}
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Glib::RefPtr<Gdk::Pixbuf> _get_icon_pixbuf(Glib::RefPtr<Gio::Icon> const& icon, int size, Gtk::IconTheme& theme)
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{
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if (icon == nullptr)
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{
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return {};
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}
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if (auto* const ticon = dynamic_cast<Gio::ThemedIcon*>(gtr_get_ptr(icon)); ticon != nullptr)
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{
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return get_themed_icon_pixbuf(*ticon, size, theme);
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}
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if (auto* const ficon = dynamic_cast<Gio::FileIcon*>(gtr_get_ptr(icon)); ficon != nullptr)
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{
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return get_file_icon_pixbuf(*ficon, size);
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}
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return {};
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}
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Glib::RefPtr<Gdk::Pixbuf> icon_cache_get_mime_type_icon(IconCache& icons, Glib::ustring const& mime_type)
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{
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auto icon = Gio::content_type_get_icon(mime_type);
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auto key = _icon_cache_get_icon_key(icon);
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if (key.empty())
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{
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key = VoidPixbufKey;
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}
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if (auto pixbuf_it = icons.cache.find(key); pixbuf_it != icons.cache.end())
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{
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return pixbuf_it->second;
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}
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auto const pixbuf = _get_icon_pixbuf(icon, icons.icon_size, *gtr_get_ptr(icons.icon_theme));
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if (pixbuf != nullptr)
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{
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icons.cache.try_emplace(key, pixbuf);
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}
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return pixbuf;
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}
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} // namespace
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Glib::RefPtr<Gdk::Pixbuf> gtr_get_mime_type_icon(
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Glib::ustring const& mime_type,
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Gtk::IconSize icon_size,
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Gtk::Widget& for_widget)
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{
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int n;
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switch (icon_size)
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{
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case Gtk::ICON_SIZE_MENU:
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n = 1;
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break;
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case Gtk::ICON_SIZE_SMALL_TOOLBAR:
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n = 2;
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break;
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case Gtk::ICON_SIZE_LARGE_TOOLBAR:
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n = 3;
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break;
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case Gtk::ICON_SIZE_BUTTON:
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n = 4;
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break;
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case Gtk::ICON_SIZE_DND:
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n = 5;
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break;
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case Gtk::ICON_SIZE_DIALOG:
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n = 6;
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break;
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default: /*GTK_ICON_SIZE_INVALID*/
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n = 0;
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break;
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}
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if (icon_cache[n] == nullptr)
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{
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icon_cache[n] = icon_cache_new(for_widget, icon_size);
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}
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return icon_cache_get_mime_type_icon(*icon_cache[n], mime_type);
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}
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Glib::ustring gtr_get_mime_type_from_filename(std::string const& file)
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{
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bool result_uncertain;
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return Gio::content_type_guess(file, {}, result_uncertain);
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}
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