Initial commit.

static/js/lib/common.js

@@ -0,0 +1,46 @@
+
+import Validation from "./validation.js";
+
+export default class Common {
+    static parseFloatWithDefault(value, defaultValue = 0.00) {
+        if (!Validation.isEmpty(value) && Validation.isValidNumber(value, true)) {
+            return parseFloat(value);
+        }
+        return defaultValue;
+    }
+
+    static allowClick() {
+        return !document.querySelectorAll("body").classList.contains(_dataLoadingFlag);
+    }
+
+    static displayOverlay(message, show, force) {
+
+        if (show) {
+            _overlayLoadingCount += 1;
+        }
+        else if (force) {
+            _overlayLoadingCount = 0;
+        }
+        else {
+            _overlayLoadingCount -= 1;
+            if (_overlayLoadingCount < 0) _overlayLoadingCount = 0;
+        }
+
+        var loadingImg = document.querySelectorAll(idImageLoading);
+        var overlay = document.querySelectorAll(loadingImg.closest("div.overlay"));
+
+        if (_overlayLoadingCount == 0) {
+
+            // Prevent short glimpse of prev. content before switch to new content
+            // caused by data load but not fully rendered
+            setTimeout(function() {
+                overlay.fadeOut();
+            }, 100);
+        }
+        else if (show && _overlayLoadingCount == 1) {
+            // only show once
+            loadingImg.innerHTML = message;
+            overlay.style.display = "";
+        }
+    }
+}