Extract minithumbnail into own Loader

qml/components/TDLibMinithumbnail.qml

@@ -0,0 +1,56 @@
+/*
+    Copyright (C) 2020 Sebastian J. Wolf and other contributors
+
+    This file is part of Fernschreiber.
+
+    Fernschreiber 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.
+
+    Fernschreiber 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 Fernschreiber. If not, see <http://www.gnu.org/licenses/>.
+*/
+import QtQuick 2.6
+import Sailfish.Silica 1.0
+import QtGraphicalEffects 1.0
+
+Loader {
+    id: loader
+    property var minithumbnail
+    property bool highlighted
+    anchors.fill: parent
+    active: !!minithumbnail
+    visible: active
+    sourceComponent: Component {
+        Item {
+            Image {
+                id: minithumbnailImage
+                anchors.fill: parent
+                source: "data:image/jpg;base64,"+minithumbnail.data
+                asynchronous: true
+                fillMode: tdLibImage.fillMode
+                opacity: status === Image.Ready ? 1.0 : 0.0
+                cache: false
+                visible: opacity > 0
+                Behavior on opacity { FadeAnimation {} }
+
+                layer {
+                    enabled: loader.highlighted
+                    effect: PressEffect { source: minithumbnailImage }
+                }
+            }
+
+            FastBlur {
+                anchors.fill: parent
+                source: minithumbnailImage
+                radius: Theme.paddingLarge
+            }
+        }
+    }
+}

qml/components/TDLibPhoto.qml

@@ -0,0 +1,78 @@
+/*
+    Copyright (C) 2020 Sebastian J. Wolf and other contributors
+
+    This file is part of Fernschreiber.
+
+    Fernschreiber 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.
+
+    Fernschreiber 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 Fernschreiber. If not, see <http://www.gnu.org/licenses/>.
+*/
+import QtQuick 2.6
+import WerkWolf.Fernschreiber 1.0
+import Sailfish.Silica 1.0
+
+Item {
+    id: tdLibPhoto
+    property var photo
+    property bool highlighted
+    readonly property alias fileInformation: tdLibImage.fileInformation
+    readonly property alias image: tdLibImage
+
+    onWidthChanged: setImageFile()
+    onPhotoChanged: setImageFile()
+
+    function setImageFile() {
+        if (photo) {
+            var photoSize;
+            for (var i = 0; i < photo.sizes.length; i++) {
+                photoSize = photo.sizes[i].photo;
+                if (photo.sizes[i].width >= width) {
+                    break;
+                }
+            }
+            if (photoSize && photoSize.id !== tdLibImage.fileInformation.id) {
+                tdLibImage.fileInformation = photoSize;
+            }
+        }
+    }
+
+    Loader {
+        anchors.fill: parent
+        active: !!tdLibPhoto.photo.minithumbnail
+        asynchronous: true
+        sourceComponent: Component {
+            Image {
+                id: minithumbnail
+                source: "data:image/jpg;base64,"+tdLibPhoto.photo.minithumbnail.data
+                asynchronous: true
+                fillMode: tdLibImage.fillMode
+                smooth: false
+                cache: false
+
+                layer {
+                    enabled: tdLibPhoto.highlighted
+                    effect: PressEffect { source: minithumbnail }
+                }
+            }
+        }
+    }
+
+    TDLibImage {
+        id: tdLibImage
+        width: parent.width //don't use anchors here for easier custom scaling
+        height: parent.height
+        cache: false
+        highlighted: parent.highlighted
+    }
+
+    Component.onCompleted: setImageFile()
+}

qml/components/TDLibThumbnail.qml

@@ -50,7 +50,7 @@ Item {
             - video
             - videoNote
     */
-    property var minithumbnail
+    property alias minithumbnail: minithumbnailLoader.minithumbnail
     property bool useBackgroundImage: true
     property bool highlighted
 
@@ -65,29 +65,12 @@ Item {
         effect: PressEffect { source: tdlibThumbnail }
     }
 
-    Loader {
-        id: backgroundLoader
-        anchors.fill: parent
-        active: !parent.hasVisibleThumbnail
-        asynchronous: true
-        sourceComponent: !!parent.minithumbnail ? miniThumbnailComponent : parent.useBackgroundImage ? backgroundImageComponent : ""
-        Component {
-            id: backgroundImageComponent
-            BackgroundImage {}
-        }
-        Component {
-            id: miniThumbnailComponent
-            Image {
-                clip: true
-                asynchronous: true
-                fillMode: Image.PreserveAspectCrop
-                opacity: status === Image.Ready ? 1.0 : 0.0
-                smooth: false
-                source: "data:image/jpg;base64," + tdlibThumbnail.miniThumbnail.data
-                visible: opacity > 0
-                Behavior on opacity { FadeAnimation {} }
-            }
-        }
+    TDLibMinithumbnail {
+        id: minithumbnailLoader
+        active: !!minithumbnail && thumbnailImage.opacity < 1.0
+    }
+    BackgroundImage {
+        visible: tdlibThumbnail.useBackgroundImage && thumbnailImage.opacity < 1.0
     }
 
     // image thumbnail