add scanlines

server/scripts/index.mjs

@@ -38,6 +38,7 @@ const init = () => {
 	document.querySelector('#NavigateNext').addEventListener('click', btnNavigateNextClick);
 	document.querySelector('#NavigatePrevious').addEventListener('click', btnNavigatePreviousClick);
 	document.querySelector('#NavigatePlay').addEventListener('click', btnNavigatePlayClick);
+	document.querySelector('#ToggleScanlines').addEventListener('click', btnNavigateToggleScanlines);
 	document.querySelector(TOGGLE_FULL_SCREEN_SELECTOR).addEventListener('click', btnFullScreenClick);
 	const btnGetGps = document.querySelector(BNT_GET_GPS_SELECTOR);
 	btnGetGps.addEventListener('click', btnGetGpsClick);
@@ -344,6 +345,11 @@ const btnNavigatePlayClick = () => {
 	return false;
 };
 
+const btnNavigateToggleScanlines = () => {
+	settings.scanLines.value = !settings.scanLines.value;
+	return false;
+};
+
 // post a message to the iframe
 const postMessage = (type, myMessage = {}) => {
 	navMessage({ type, message: myMessage });

server/scripts/modules/settings.mjs

@@ -33,6 +33,12 @@ const init = () => {
 			[1.5, 'Very Slow'],
 		],
 	});
+	settings.scanLines = new Setting('scanLines', {
+		name: 'Scan Lines',
+		defaultValue: false,
+		changeAction: scanLineChange,
+		sticky: true,
+	});
 	settings.units = new Setting('units', {
 		name: 'Units',
 		type: 'select',
@@ -85,6 +91,18 @@ const kioskChange = (value) => {
 	}
 };
 
+const scanLineChange = (value) => {
+	const container = document.getElementById('container');
+	const navIcons = document.getElementById('ToggleScanlines');
+	if (value) {
+		container.classList.add('scanlines');
+		navIcons.classList.add('on');
+	} else {
+		container.classList.remove('scanlines');
+		navIcons.classList.remove('on');
+	}
+};
+
 const unitChange = () => {
 	// reload the data at the top level to refresh units
 	// after the initial load

server/scripts/modules/utils/fetch.mjs

@@ -7,7 +7,7 @@ const blob = (url, params) => fetchAsync(url, 'blob', params);
 const fetchAsync = async (_url, responseType, _params = {}) => {
 	// add user agent header to json request at api.weather.gov
 	const headers = {};
-	if (_url.match(/api\.weather\.gov/)) {
+	if (_url.toString().match(/api\.weather\.gov/)) {
 		headers['user-agent'] = 'Weatherstar 4000+; weatherstar@netbymatt.com';
 	}
 	// combine default and provided parameters

server/scripts/modules/utils/setting.mjs

@@ -189,7 +189,7 @@ class Setting {
 				break;
 			case 'checkbox':
 			default:
-				this.element.checked = newValue;
+				this.element.querySelector('input').checked = newValue;
 		}
 		this.storeToLocalStorage(this.myValue);
 

server/styles/scss/_page.scss

@@ -458,6 +458,30 @@ body {
 	cursor: pointer;
 }
 
+#ToggleScanlines {
+	display: inline-block;
+
+	.on {
+		display: none;
+	}
+
+	.off {
+		display: inline-block;
+	}
+
+
+	&.on {
+		.on {
+			display: inline-block;
+		}
+
+		.off {
+			display: none;
+		}
+
+	}
+}
+
 .visible {
 	visibility: visible;
 	opacity: 1;

server/styles/scss/main.scss

@@ -14,3 +14,4 @@
 @use 'hazards';
 @use 'media';
 @use 'spc-outlook';
+@use 'shared/scanlines';

server/styles/scss/shared/_scanlines.scss

@@ -0,0 +1,106 @@
+/* REGULAR SCANLINES SETTINGS */
+
+// width of 1 scanline (min.: 1px)
+$scan-width: 1px;
+
+// emulates a damage-your-eyes bad pre-2000 CRT screen ♥ (true, false)
+$scan-crt: false;
+
+// frames-per-second (should be > 1), only applies if $scan-crt: true;
+$scan-fps: 20;
+
+// scanline-color (rgba)
+$scan-color: rgba(#000, .3);
+
+// set z-index on 8, like in ♥ 8-bits ♥, or…
+// set z-index on 2147483648 or more to enable scanlines on Chrome fullscreen (doesn't work in Firefox or IE);
+$scan-z-index: 2147483648;
+
+/* MOVING SCANLINE SETTINGS */
+
+// moving scanline (true, false)
+$scan-moving-line: true;
+
+// opacity of the moving scanline
+$scan-opacity: .75;
+
+/* MIXINS */
+
+// apply CRT animation: @include scan-crt($scan-crt);
+@mixin scan-crt($scan-crt) {
+	@if $scan-crt==true {
+		animation: scanlines 1s steps($scan-fps) infinite;
+	}
+
+	@else {
+		animation: none;
+	}
+}
+
+// apply CRT animation: @include scan-crt($scan-crt);
+@mixin scan-moving($scan-moving-line) {
+	@if $scan-moving-line==true {
+		animation: scanline 6s linear infinite;
+	}
+
+	@else {
+		animation: none;
+	}
+}
+
+/* CSS .scanlines CLASS */
+
+.scanlines {
+	position: relative;
+	overflow: hidden; // only to animate the unique scanline
+
+	&:before,
+	&:after {
+		display: block;
+		pointer-events: none;
+		content: '';
+		position: absolute;
+	}
+
+	// unique scanline travelling on the screen
+	&:before {
+		// position: absolute;
+		// bottom: 100%;
+		width: 100%;
+		height: $scan-width * 1;
+		z-index: $scan-z-index + 1;
+		background: $scan-color;
+		opacity: $scan-opacity;
+		// animation: scanline 6s linear infinite;
+		@include scan-moving($scan-moving-line);
+	}
+
+	// the scanlines, so!
+	&:after {
+		top: 0;
+		right: 0;
+		bottom: 0;
+		left: 0;
+		z-index: $scan-z-index;
+		background: linear-gradient(to bottom,
+				transparent 50%,
+				$scan-color 51%);
+		background-size: 100% $scan-width*2;
+		@include scan-crt($scan-crt);
+	}
+}
+
+/* ANIMATE UNIQUE SCANLINE */
+@keyframes scanline {
+	0% {
+		transform: translate3d(0, 200000%, 0);
+		// bottom: 0%; // to have a continuous scanline move, use this line (here in 0% step) instead of transform and write, in &:before, { position: absolute; bottom: 100%; }
+	}
+}
+
+@keyframes scanlines {
+	0% {
+		background-position: 0 50%;
+		// bottom: 0%; // to have a continuous scanline move, use this line (here in 0% step) instead of transform and write, in &:before, { position: absolute; bottom: 100%; }
+	}
+}

views/index.ejs

@@ -145,6 +145,10 @@
 					<img class="navButton off" src="images/nav/ic_volume_off_white_24dp_2x.png" title="Unmute" />
 					<img class="navButton on" src="images/nav/ic_volume_on_white_24dp_2x.png" title="Mute" />
 				</div>
+				<div id="ToggleScanlines">
+					<img class="navButton off" src="images/nav/ic_scanlines_off_white_24dp_2x.png" title="Scan lines on" />
+					<img class="navButton on" src="images/nav/ic_scanlines_on_white_24dp_2x.png" title="Scan lines off" />
+				</div>
         <img id="ToggleFullScreen" class="navButton" src="images/nav/ic_fullscreen_white_24dp_2x.png" title="Enter Fullscreen" />
       </div>
     </div>