loading-indicator: Fix loading indicator when server is loaded.

This PR changes the current implementation of the loading indicator by attaching
the indicator to the right dom element, so that it doesn't show up once a server
is loaded.

Fixes: #482.

app/renderer/css/main.css

@@ -13,9 +13,6 @@ body {
 #content {
     display: flex;
     height: 100%;
-    background: #fff url(../img/ic_loading.gif) no-repeat;
-    background-size: 60px 60px;
-    background-position: center;
 }
 
 .toggle-sidebar {
@@ -273,6 +270,25 @@ body {
     width: 100%;
 }
 
+/*Pseudo element for loading indicator*/
+#webviews-container::before {
+    content: "";
+    position: absolute;
+    z-index: 1;
+    background: #fff url(../img/ic_loading.gif) no-repeat;
+    background-size: 60px 60px;
+    background-position: center;
+    width: 100%;
+    height: 100%;
+}
+
+/*When the active webview is loaded*/
+#webviews-container.loaded::before {
+    opacity: 0;
+    z-index: -1;
+    visibility: hidden;
+}
+
 webview {
     /* transition: opacity 0.3s ease-in; */
     flex-grow: 1;

app/renderer/js/components/webview.js

@@ -18,9 +18,10 @@ class WebView extends BaseComponent {
 		this.props = props;
 
 		this.zoomFactor = 1.0;
-		this.loading = false;
+		this.loading = true;
 		this.badgeCount = 0;
 		this.customCSS = ConfigUtil.getConfigItem('customCSS');
+		this.$webviewsContainer = document.querySelector('#webviews-container').classList;
 	}
 
 	template() {
@@ -86,6 +87,7 @@ class WebView extends BaseComponent {
 			if (this.props.role === 'server') {
 				this.$el.classList.add('onload');
 			}
+			this.loading = false;
 			this.show();
 		});
 
@@ -119,6 +121,13 @@ class WebView extends BaseComponent {
 			return;
 		}
 
+		// To show or hide the loading indicator in the the active tab
+		if (this.loading) {
+			this.$webviewsContainer.remove('loaded');
+		} else {
+			this.$webviewsContainer.add('loaded');
+		}
+
 		this.$el.classList.remove('disabled');
 		this.$el.classList.add('active');
 		setTimeout(() => {
@@ -127,7 +136,6 @@ class WebView extends BaseComponent {
 			}
 		}, 1000);
 		this.focus();
-		this.loading = false;
 		this.props.onTitleChange();
 		// Injecting preload css in webview to override some css rules
 		this.$el.insertCSS(fs.readFileSync(path.join(__dirname, '/../../css/preload.css'), 'utf8'));
@@ -220,6 +228,9 @@ class WebView extends BaseComponent {
 
 	reload() {
 		this.hide();
+		// Shows the loading indicator till the webview is reloaded
+		this.$webviewsContainer.remove('loaded');
+		this.loading = true;
 		this.$el.reload();
 	}
 

app/renderer/js/main.js

@@ -272,6 +272,9 @@ class ServerManagerView {
 				preload: false
 			})
 		}));
+		// To show loading indicator the first time a functional tab is opened, indicator is
+		// closed when the functional tab DOM is ready, handled in webview.js
+		this.$webviewsContainer.classList.remove('loaded');
 		this.activateTab(this.functionalTabs[tabProps.name]);
 	}
 
@@ -386,6 +389,9 @@ class ServerManagerView {
 	}
 
 	destroyView() {
+		// Show loading indicator
+		this.$webviewsContainer.classList.remove('loaded');
+
 		// Clear global variables
 		this.activeTabIndex = -1;
 		this.tabs = [];