move window.__config to an Angular constant; refactor AngularViewArray -> ViewArray + ViewArrayFactory

static/js/services/view-array/view-array.ts

@@ -0,0 +1,62 @@
+/**
+ * Specialized wrapper around array which provides a toggle() method for viewing the contents of the
+ * array in a manner that is asynchronously filled in over a short time period. This prevents long
+ * pauses in the UI for ngRepeat's when the array is significant in size.
+ */
+export abstract class ViewArray {
+
+    /**
+     * The stored entries.
+     */
+    public abstract entries: any;
+
+    /**
+     * If the entries are displayed.
+     */
+    public abstract isVisible: boolean;
+
+    /**
+     * The displayed entries.
+     */
+    public abstract visibleEntries: any[];
+
+    /**
+     * If there are stored entries.
+     */
+    public abstract hasEntries: boolean;
+
+    /**
+     * If there are entries not visible.
+     */
+    public abstract hasHiddenEntries: boolean;
+
+    /**
+     * Get the number of entries stored.
+     * @return number The number of entries.
+     */
+    public abstract length(): number;
+
+    /**
+     * Get a specific entry.
+     * @param index The index of the entry.
+     * @return element The element at the given index.
+     */
+    public abstract get(index: number): any;
+
+    /**
+     * Add a new element.
+     * @param elem The new element.
+     */
+    public abstract push(elem: any): void;
+
+    /**
+     * Toggle whether the elements are visible.
+     */
+    public abstract toggle(): void;
+
+    /**
+     * Set whether the elements are visible.
+     * @param newState True/False if the contents are visible.
+     */
+    public abstract setVisible(newState: boolean): void;
+}