Initial commit

src/js/views/html/WindowWaiter.js

@@ -0,0 +1,52 @@
+/**
+ * Waiter to handle events related to the window object.
+ *
+ * @author n1474335 [n1474335@gmail.com]
+ * @copyright Crown Copyright 2016
+ * @license Apache-2.0
+ *
+ * @constructor
+ * @param {HTMLApp} app - The main view object for CyberChef.
+ */
+var WindowWaiter = function(app) {
+    this.app = app;
+};
+
+
+/**
+ * Handler for window resize events.
+ * Resets the layout of CyberChef's panes after 200ms (so that continuous resizing doesn't cause
+ * continuous resetting).
+ */
+WindowWaiter.prototype.window_resize = function() {
+    clearTimeout(this.reset_layout_timeout);
+    this.reset_layout_timeout = setTimeout(this.app.reset_layout.bind(this.app), 200);
+};
+
+
+/**
+ * Handler for window blur events.
+ * Saves the current time so that we can calculate how long the window was unfocussed for when
+ * focus is returned.
+ */
+WindowWaiter.prototype.window_blur = function() {
+    this.window_blur_time = new Date().getTime();
+};
+
+
+/**
+ * Handler for window focus events.
+ *
+ * When a browser tab is unfocused and the browser has to run lots of dynamic content in other
+ * tabs, it swaps out the memory for that tab.
+ * If the CyberChef tab has been unfocused for more than a minute, we run a silent bake which will
+ * force the browser to load and cache all the relevant JavaScript code needed to do a real bake.
+ * This will stop baking taking a long time when the CyberChef browser tab has been unfocused for
+ * a long time and the browser has swapped out all its memory.
+ */
+WindowWaiter.prototype.window_focus = function() {
+    var unfocused_time = new Date().getTime() - this.window_blur_time;
+    if (unfocused_time > 60000) {
+        this.app.silent_bake();
+    }
+};