Initial commit

ii/modules/common/Images.qml

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+pragma Singleton
+
+import Quickshell
+
+Singleton {
+    // Formats
+    readonly property list<string> validImageTypes: ["jpeg", "png", "webp", "tiff", "svg"]
+    readonly property list<string> validImageExtensions: ["jpg", "jpeg", "png", "webp", "tif", "tiff", "svg"]
+
+    function isValidImageByName(name: string): bool {
+        return validImageExtensions.some(t => name.endsWith(`.${t}`));
+    }
+
+    // Thumbnails
+    // https://specifications.freedesktop.org/thumbnail-spec/latest/directory.html
+    readonly property var thumbnailSizes: ({
+        "normal": 128,
+        "large": 256,
+        "x-large": 512,
+        "xx-large": 1024
+    })
+    function thumbnailSizeNameForDimensions(width: int, height: int): string {
+        const sizeNames = Object.keys(thumbnailSizes);
+        for(let i = 0; i < sizeNames.length; i++) {
+            const sizeName = sizeNames[i];
+            const maxSize = thumbnailSizes[sizeName];
+            if (width <= maxSize && height <= maxSize) return sizeName;
+        }
+        return "xx-large";
+    }
+}