Implement search provider (#201)

* Begin work on search provider

* Initial search provider work, organize meson

* Initial work on icons

* Implement LaunchSearch

* Don't hold arbitrary reference to service

I don't know why Lollypop does this

* Send notification, pad images

* Update translations

* Fix init_search_term typing

cartridges/game_cover.py

@@ -0,0 +1,132 @@
+# game_cover.py
+#
+# Copyright 2022-2023 kramo
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+from pathlib import Path
+from typing import Optional
+
+from gi.repository import Gdk, GdkPixbuf, Gio, GLib, Gtk
+from PIL import Image, ImageFilter, ImageStat
+
+from cartridges import shared
+
+
+class GameCover:
+    texture: Optional[Gdk.Texture]
+    blurred: Optional[Gdk.Texture]
+    luminance: Optional[tuple[float, float]]
+    path: Optional[Path]
+    animation: Optional[GdkPixbuf.PixbufAnimation]
+    anim_iter: Optional[GdkPixbuf.PixbufAnimationIter]
+
+    placeholder = Gdk.Texture.new_from_resource(
+        shared.PREFIX + "/library_placeholder.svg"
+    )
+    placeholder_small = Gdk.Texture.new_from_resource(
+        shared.PREFIX + "/library_placeholder_small.svg"
+    )
+
+    def __init__(self, pictures: set[Gtk.Picture], path: Optional[Path] = None) -> None:
+        self.pictures = pictures
+        self.new_cover(path)
+
+    def new_cover(self, path: Optional[Path] = None) -> None:
+        self.animation = None
+        self.texture = None
+        self.blurred = None
+        self.luminance = None
+        self.path = path
+
+        if path:
+            if path.suffix == ".gif":
+                self.animation = GdkPixbuf.PixbufAnimation.new_from_file(str(path))
+                self.anim_iter = self.animation.get_iter()
+                self.task = Gio.Task.new()
+                self.task.run_in_thread(
+                    lambda *_: self.update_animation((self.task, self.animation))
+                )
+            else:
+                self.texture = Gdk.Texture.new_from_filename(str(path))
+
+        if not self.animation:
+            self.set_texture(self.texture)
+
+    def get_texture(self) -> Gdk.Texture:
+        return (
+            Gdk.Texture.new_for_pixbuf(self.animation.get_static_image())
+            if self.animation
+            else self.texture
+        )
+
+    def get_blurred(self) -> Gdk.Texture:
+        if not self.blurred:
+            if self.path:
+                with Image.open(self.path) as image:
+                    image = (
+                        image.convert("RGB")
+                        .resize((100, 150))
+                        .filter(ImageFilter.GaussianBlur(20))
+                    )
+
+                    tmp_path = Gio.File.new_tmp(None)[0].get_path()
+                    image.save(tmp_path, "tiff", compression=None)
+
+                    self.blurred = Gdk.Texture.new_from_filename(tmp_path)
+
+                    stat = ImageStat.Stat(image.convert("L"))
+
+                    # Luminance values for light and dark mode
+                    self.luminance = (
+                        min((stat.mean[0] + stat.extrema[0][0]) / 510, 0.7),
+                        max((stat.mean[0] + stat.extrema[0][1]) / 510, 0.3),
+                    )
+            else:
+                self.blurred = self.placeholder_small
+                self.luminance = (0.3, 0.5)
+
+        return self.blurred
+
+    def add_picture(self, picture: Gtk.Picture) -> None:
+        self.pictures.add(picture)
+        if not self.animation:
+            self.set_texture(self.texture)
+        else:
+            self.update_animation((self.task, self.animation))
+
+    def set_texture(self, texture: Gdk.Texture) -> None:
+        self.pictures.discard(
+            picture for picture in self.pictures if not picture.is_visible()
+        )
+        if not self.pictures:
+            self.animation = None
+        else:
+            for picture in self.pictures:
+                picture.set_paintable(texture or self.placeholder)
+
+    def update_animation(self, data: GdkPixbuf.PixbufAnimation) -> None:
+        if self.animation == data[1]:
+            self.anim_iter.advance()  # type: ignore
+
+            self.set_texture(Gdk.Texture.new_for_pixbuf(self.anim_iter.get_pixbuf()))  # type: ignore
+
+            delay_time = self.anim_iter.get_delay_time()  # type: ignore
+            GLib.timeout_add(
+                20 if delay_time < 20 else delay_time,
+                self.update_animation,
+                data,
+            )