Quick fix to enforce a minimum jpeg quality of 50

As Calibre doesn't support lower values

Author: shermp

kobo-uncaged/static/ku.js

@@ -310,7 +310,11 @@ function sendConfig() {
     kuConfig.opts.enableDebug = document.getElementById('enableDebug').checked;
     kuConfig.opts.thumbnail.generateLevel = gl.options[gl.selectedIndex].value;
     kuConfig.opts.thumbnail.resizeAlgorithm = rs.options[rs.selectedIndex].value;
-    kuConfig.opts.thumbnail.jpegQuality = parseInt(document.getElementById('jpegQuality').value);
+    var jpgQuality = parseInt(document.getElementById('jpegQuality').value);
+    if (jpgQuality < 50) {
+        jpgQuality = 50;
+    }
+    kuConfig.opts.thumbnail.jpegQuality = jpgQuality;
     kuConfig.opts.directConnIndex = document.getElementById('directConn').selectedIndex - 1;
     var xhr = new XMLHttpRequest();
     xhr.open('POST', kuInfo.configPath);

kobo-uncaged/templates/kuPage.tmpl

@@ -62,7 +62,7 @@
                 <label for="jpegQuality" data-help-text="The JPEG compression quality. Range is 0-100, higher is better.">
                     Thumbnail JPEG Quality
                 </label>
-                <input type="number" id="jpegQuality" name="jpegQuality" min="0">
+                <input type="number" id="jpegQuality" name="jpegQuality" min="50">
             </div>
             <div class="ku-cfg-row-conn">
                 <label for="directConn" data-help-text="Set direct connection rather than auto-discover.">