615 lines
18 KiB
JavaScript
615 lines
18 KiB
JavaScript
var orientations = {
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PORTRAIT: 0,
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LANDSCAPE_LEFT: 90,
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LANDSCAPE_RIGHT: -90,
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};
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function
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DeriveReliableWindowDimensions()
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{
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// https://www.howtocreate.co.uk/tutorials/javascript/browserwindow
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var Result = {
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X: null,
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Y: null,
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};
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var ScrollPosX = window.scrollX;
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var ScrollPosY = window.scrollY;
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var DisplaySettings = [];
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for(var i = 0; i < document.body.children.length; ++i)
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{
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var Child = document.body.children[i];
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DisplaySettings.push(Child.style.display);
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Child.style.display = "none";
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}
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var Element = document.createElement("div");
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Element.style.position = "fixed";
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Element.style.top = 0;
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Element.style.right = 0;
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Element.style.bottom = 0;
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Element.style.left = 0;
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Element.style.zOffset = -1;
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Element.style.opacity = 0;
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var ElementInPlace = document.body.appendChild(Element);
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Result.X = ElementInPlace.offsetWidth;
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Result.Y = ElementInPlace.offsetHeight;
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ElementInPlace.remove();
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for(var i = 0; i < document.body.children.length; ++i)
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{
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var Child = document.body.children[i];
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Child.style.display = DisplaySettings.shift();
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}
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ScrollTriggeredInternally = true;
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window.scroll(ScrollPosX, ScrollPosY);
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return Result;
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}
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function
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GetWindowDim(IsMobile)
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{
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var Result = {
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X: null,
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Y: null,
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};
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if(IsMobile)
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{
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Result = DeriveReliableWindowDimensions();
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}
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else
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{
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Result.X = document.documentElement.clientWidth;
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Result.Y = document.documentElement.clientHeight;
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}
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return Result;
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}
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function IsVisible(Element, WindowDim) {
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var BoundingRect = Element.getBoundingClientRect();
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return ((BoundingRect.top >= 0 && BoundingRect.top <= WindowDim.Y) ||
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(BoundingRect.bottom >= 0 && BoundingRect.bottom <= WindowDim.Y) ||
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(BoundingRect.top < 0 && BoundingRect.bottom > WindowDim.Y))
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&& ((BoundingRect.left >= 0 && BoundingRect.left <= WindowDim.X) ||
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(BoundingRect.right >= 0 && BoundingRect.right <= WindowDim.X) ||
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(BoundingRect.left < 0 && BoundingRect.right > WindowDim.X));
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}
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function
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GetRealOrientation(PreferredLandscape, IsMobile)
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{
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var Result = screen.orientation.angle;
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var WindowDim = GetWindowDim(IsMobile);
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if(WindowDim.Y > WindowDim.X)
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{
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Result = orientations.PORTRAIT;
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}
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else if(Result == undefined || Result == orientations.PORTRAIT)
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{
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Result = PreferredLandscape;
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}
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return Result;
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}
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var DebugConsoleMessageCount = 0;
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function Say(Message)
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{
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var DebugConsole = document.getElementById("debug-console");
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if(DebugConsole)
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{
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DebugConsole.textContent += DebugConsoleMessageCount++ + ": " + Message + "\n";
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DebugConsole.scrollTo(
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{
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top: DebugConsole.scrollHeight,
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behavior: "smooth"
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});
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}
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}
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function getBackgroundBrightness(element) {
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var colour = getComputedStyle(element).getPropertyValue("background-color");
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var depth = 0;
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while((colour == "transparent" || colour == "rgba(0, 0, 0, 0)") && depth <= 4)
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{
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element = element.parentNode;
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colour = getComputedStyle(element).getPropertyValue("background-color");
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++depth;
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}
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var rgb = colour.slice(4, -1).split(", ");
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var result = Math.sqrt(rgb[0] * rgb[0] * .241 +
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rgb[1] * rgb[1] * .691 +
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rgb[2] * rgb[2] * .068);
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return result;
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}
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function setSpriteLightness(spriteElement)
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{
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if(getBackgroundBrightness(spriteElement) < 127)
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{
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spriteElement.classList.add("dark");
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}
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else
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{
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spriteElement.classList.remove("dark");
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}
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}
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function elementIsFocused(Element)
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{
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var Result = false;
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if(Element.classList.contains("focused"))
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{
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Result = true;
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}
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while(Element.parent)
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{
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Element = Element.parent;
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if(Element.classList.contains("focused"))
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{
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Result = true;
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break;
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}
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}
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return Result;
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}
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function focusSprite(Element)
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{
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if(Element.classList.contains("cineraSprite"))
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{
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setSpriteLightness(Element);
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Element.style.backgroundPositionY = Element.getAttribute("data-y-focused") + "px";
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}
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for(var i = 0; i < Element.childElementCount; ++i)
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{
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focusSprite(Element.children[i]);
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}
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}
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function enableSprite(Element)
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{
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if(Element.classList.contains("focused"))
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{
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focusSprite(Element);
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}
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else
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{
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if(Element.classList.contains("cineraSprite"))
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{
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setSpriteLightness(Element);
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Element.style.backgroundPositionY = Element.getAttribute("data-y-normal") + "px";
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}
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for(var i = 0; i < Element.childElementCount; ++i)
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{
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enableSprite(Element.children[i]);
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}
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}
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}
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function disableSprite(Element)
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{
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if(Element.classList.contains("focused"))
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{
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focusSprite(Element);
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}
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else
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{
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if(Element.classList.contains("cineraSprite"))
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{
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setSpriteLightness(Element);
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Element.style.backgroundPositionY = Element.getAttribute("data-y-disabled") + "px";
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}
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for(var i = 0; i < Element.childElementCount; ++i)
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{
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disableSprite(Element.children[i]);
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}
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}
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}
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function unfocusSprite(Element)
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{
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if(Element.classList.contains("off"))
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{
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disableSprite(Element);
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}
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else
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{
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if(Element.classList.contains("cineraSprite"))
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{
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setSpriteLightness(Element);
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Element.style.backgroundPositionY = Element.getAttribute("data-y-normal") + "px";
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}
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for(var i = 0; i < Element.childElementCount; ++i)
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{
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unfocusSprite(Element.children[i]);
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}
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}
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}
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function IsMobile() {
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// NOTE(matt): From https://medium.com/simplejs/detect-the-users-device-type-with-a-simple-javascript-check-4fc656b735e1
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var Identifier = navigator.userAgent||navigator.vendor||window.opera;
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var Result = (/(android|bb\d+|meego).+mobile|avantgo|bada\/|blackberry|blazer|compal|elaine|fennec|hiptop|iemobile|ip(hone|od)|iris|kindle|lge |maemo|midp|mmp|mobile.+firefox|netfront|opera m(ob|in)i|palm( os)?|phone|p(ixi|re)\/|plucker|pocket|psp|series(4|6)0|symbian|treo|up\.(browser|link)|vodafone|wap|windows ce|xda|xiino/i.test(Identifier)||/1207|6310|6590|3gso|4thp|50[1-6]i|770s|802s|a wa|abac|ac(er|oo|s\-)|ai(ko|rn)|al(av|ca|co)|amoi|an(ex|ny|yw)|aptu|ar(ch|go)|as(te|us)|attw|au(di|\-m|r |s )|avan|be(ck|ll|nq)|bi(lb|rd)|bl(ac|az)|br(e|v)w|bumb|bw\-(n|u)|c55\/|capi|ccwa|cdm\-|cell|chtm|cldc|cmd\-|co(mp|nd)|craw|da(it|ll|ng)|dbte|dc\-s|devi|dica|dmob|do(c|p)o|ds(12|\-d)|el(49|ai)|em(l2|ul)|er(ic|k0)|esl8|ez([4-7]0|os|wa|ze)|fetc|fly(\-|_)|g1 u|g560|gene|gf\-5|g\-mo|go(\.w|od)|gr(ad|un)|haie|hcit|hd\-(m|p|t)|hei\-|hi(pt|ta)|hp( i|ip)|hs\-c|ht(c(\-| |_|a|g|p|s|t)|tp)|hu(aw|tc)|i\-(20|go|ma)|i230|iac( |\-|\/)|ibro|idea|ig01|ikom|im1k|inno|ipaq|iris|ja(t|v)a|jbro|jemu|jigs|kddi|keji|kgt( |\/)|klon|kpt |kwc\-|kyo(c|k)|le(no|xi)|lg( g|\/(k|l|u)|50|54|\-[a-w])|libw|lynx|m1\-w|m3ga|m50\/|ma(te|ui|xo)|mc(01|21|ca)|m\-cr|me(rc|ri)|mi(o8|oa|ts)|mmef|mo(01|02|bi|de|do|t(\-| |o|v)|zz)|mt(50|p1|v )|mwbp|mywa|n10[0-2]|n20[2-3]|n30(0|2)|n50(0|2|5)|n7(0(0|1)|10)|ne((c|m)\-|on|tf|wf|wg|wt)|nok(6|i)|nzph|o2im|op(ti|wv)|oran|owg1|p800|pan(a|d|t)|pdxg|pg(13|\-([1-8]|c))|phil|pire|pl(ay|uc)|pn\-2|po(ck|rt|se)|prox|psio|pt\-g|qa\-a|qc(07|12|21|32|60|\-[2-7]|i\-)|qtek|r380|r600|raks|rim9|ro(ve|zo)|s55\/|sa(ge|ma|mm|ms|ny|va)|sc(01|h\-|oo|p\-)|sdk\/|se(c(\-|0|1)|47|mc|nd|ri)|sgh\-|shar|sie(\-|m)|sk\-0|sl(45|id)|sm(al|ar|b3|it|t5)|so(ft|ny)|sp(01|h\-|v\-|v )|sy(01|mb)|t2(18|50)|t6(00|10|18)|ta(gt|lk)|tcl\-|tdg\-|tel(i|m)|tim\-|t\-mo|to(pl|sh)|ts(70|m\-|m3|m5)|tx\-9|up(\.b|g1|si)|utst|v400|v750|veri|vi(rg|te)|vk(40|5[0-3]|\-v)|vm40|voda|vulc|vx(52|53|60|61|70|80|81|83|85|98)|w3c(\-| )|webc|whit|wi(g |nc|nw)|wmlb|wonu|x700|yas\-|your|zeto|zte\-/i.test(Identifier.substr(0,4)));
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return Result;
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};
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function GetRule(SelectorText)
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{
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// NOTE(matt): Modifying CSS style
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// From https://stackoverflow.com/a/566445
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// https://usefulangle.com/post/39/adding-css-to-stylesheet-with-javascript
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var Result = undefined;
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var StyleSheets = document.styleSheets;
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var cssRuleCode = document.all ? 'rules' : 'cssRules'; // account for IE and FF
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for(var StyleSheetIndex = StyleSheets.length - 1; StyleSheetIndex >= 0; --StyleSheetIndex)
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{
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var ThisSheet = StyleSheets[StyleSheetIndex];
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if(ThisSheet.href !== null && ThisSheet.href.includes(location.hostname))
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{
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var Rules = ThisSheet[cssRuleCode];
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for(var RuleIndex = Rules.length - 1; RuleIndex >= 0; --RuleIndex)
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{
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var ThisRule = Rules[RuleIndex];
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if(SelectorText === ThisRule.selectorText)
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{
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Result = ThisRule;
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break;
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}
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}
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if(Result !== undefined) { break; }
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}
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}
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return Result;
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}
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function
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GetRulesOfStyleSheetIndex(Index)
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{
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var Result = undefined;
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var StyleSheets = document.styleSheets;
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var cssRuleCode = document.all ? 'rules' : 'cssRules'; // account for IE and FF
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var StyleSheet = StyleSheets[Index];
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if(StyleSheet)
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{
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Result = StyleSheet[cssRuleCode];
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}
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return Result;
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}
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function
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GetLocalStyleSheet()
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{
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var Result;
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var StyleSheets = document.styleSheets;
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for(var StyleSheetIndex = StyleSheets.length - 1; StyleSheetIndex >= 0; --StyleSheetIndex)
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{
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var This = StyleSheets[StyleSheetIndex];
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if(This.href !== null && This.href.includes(location.hostname) && !This.disabled)
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{
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Result = This;
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break;
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}
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}
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return Result;
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}
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function
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GetOrSetRule(SelectorText)
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{
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var Result = GetRule(SelectorText);
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if(Result === undefined)
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{
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var StyleSheet = GetLocalStyleSheet();
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if(StyleSheet)
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{
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var cssRuleCode = document.all ? 'rules' : 'cssRules'; // account for IE and FF
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var Rules = StyleSheet[cssRuleCode];
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var RuleIndex = StyleSheet.insertRule(SelectorText + "{}", Rules.length - 1);
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Result = Rules[RuleIndex];
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}
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}
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return Result;
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}
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function IsInRangeEx(Min, N, Max)
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{
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return N > Min && N < Max;
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}
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/* Auto-scrolling */
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var ScrollTriggeredInternally = false;
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var LastScrollYPos = 0;
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var ScrollTicking = false;
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var ScrollerFunction;
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var ScrollCondition;
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function ScrollTo(Element, ScrollPos, IsMobile, StickyObscuringElement) {
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if(Element.offsetWidth && Element.offsetHeight)
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{
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var ScrolledToTop = ScrollPos == 0;
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var ScrolledToBottom = (window.innerHeight + Math.ceil(window.pageYOffset)) >= document.body.scrollHeight;
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if(!ScrolledToTop || !ScrolledToBottom)
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{
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var Ceiling = StickyObscuringElement ? StickyObscuringElement.offsetHeight : 0;
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var VisibleArea = GetWindowDim(IsMobile);
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VisibleArea.Y -= Ceiling;
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var PercentageOfVisibleHeightToGather = 5;
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var GatherableHeight = VisibleArea.Y * PercentageOfVisibleHeightToGather / 100;
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var BoundingRect = Element.getBoundingClientRect();
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var ElementTop = BoundingRect.top - Ceiling;
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var ElementBottom = ElementTop + BoundingRect.height;
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var UpperProtrusion = -ElementTop;
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var LowerProtrusion = ElementBottom - VisibleArea.Y;
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var DesiredScroll = null;
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var YOffsetFromPage = getElementYOffsetFromPage(Element);
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if(IsInRangeEx(0, UpperProtrusion, GatherableHeight))
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{
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if(!ScrolledToBottom)
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{
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DesiredScroll = YOffsetFromPage - Ceiling;
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}
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}
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else if(IsInRangeEx(0, LowerProtrusion, GatherableHeight))
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{
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if(!ScrolledToTop)
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{
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if(IsInRangeEx(0, UpperProtrusion + LowerProtrusion, GatherableHeight))
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{
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DesiredScroll = YOffsetFromPage - Ceiling;
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}
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else
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{
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DesiredScroll = ScrollPos + LowerProtrusion;
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}
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}
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}
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if(DesiredScroll !== null && DesiredScroll != ScrollPos)
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{
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window.scrollTo({
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top: DesiredScroll,
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behavior: "smooth"
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});
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}
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}
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}
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}
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function
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InitScrollEventListener(Element, IsMobile, StickyObscuringElement)
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{
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window.addEventListener('scroll', function() {
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if(ScrollTriggeredInternally)
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{
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ScrollTriggeredInternally = false;
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}
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else if(ScrollCondition == undefined || ScrollCondition == true)
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{
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LastScrollYPos = window.scrollY;
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if (!ScrollTicking) {
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window.requestAnimationFrame(function() {
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clearTimeout(ScrollerFunction);
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ScrollerFunction = setTimeout(ScrollTo, 2000, Element, LastScrollYPos, IsMobile, StickyObscuringElement);
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ScrollTicking = false;
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});
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ScrollTicking = true;
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}
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}
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});
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}
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/* /Auto-scrolling */
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function getElementXOffsetFromPage(el) {
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var left = 0;
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do {
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left += el.offsetLeft;
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} while (el = el.offsetParent);
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return left;
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}
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function getElementYOffsetFromPage(el) {
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var top = 0;
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do {
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top += el.offsetTop;
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} while (el = el.offsetParent);
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return top;
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}
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function
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MaxWidthOfElement(Element, WindowDim)
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{
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// NOTE(matt): This works fine for Elements whose natural max width fills the whole line, i.e. block elements and children
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// thereof. To support inline elements, we'll need to mirror MaxHeightOfElement() and may as well roll the two
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// functions into one.
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var Result = 0;
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var OriginalWidth = Element.style.width;
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Element.style.width = "100%";
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var NaturalMax = Element.offsetWidth;
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Element.style.width = OriginalWidth;
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var InnerWidth = WindowDim ? WindowDim.X : document.documentElement.clientWidth;
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Result = Math.min(NaturalMax, InnerWidth);
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return Result;
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}
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function
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MaxHeightOfElement(Element, WindowDim)
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{
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var Result = 0;
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var DisplaySettings = [];
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for(var i = 0; i < Element.children.length; ++i)
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{
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var Child = Element.children[i];
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DisplaySettings.push(Child.style.display);
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Child.style.display = "none";
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}
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var OriginalHeight = Element.style.height;
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Element.style.height = "100%";
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var NaturalMax = Element.offsetHeight;
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Element.style.height = OriginalHeight;
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var InnerHeight = WindowDim ? WindowDim.Y : document.documentElement.clientHeight;
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if(NaturalMax > 0)
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{
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Result = Math.min(NaturalMax, InnerHeight);
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}
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else
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{
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Result = InnerHeight;
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}
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for(var i = 0; i < Element.children.length; ++i)
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{
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var Child = Element.children[i];
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Child.style.display = DisplaySettings.shift();
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}
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return Result;
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}
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function
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MaxDimensionsOfElement(Element, WindowDim)
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{
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var Result = {
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X: null,
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Y: null,
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};
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Result.X = MaxWidthOfElement(Element, WindowDim);
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Result.Y = MaxHeightOfElement(Element, WindowDim);
|
|
return Result;
|
|
}
|
|
|
|
function
|
|
Clamp(EndA, N, EndB)
|
|
{
|
|
var Min = EndA < EndB ? EndA : EndB;
|
|
var Max = EndA > EndB ? EndA : EndB;
|
|
return N < Min ? Min : N > Max ? Max : N;
|
|
}
|
|
|
|
function
|
|
Clamp01(N)
|
|
{
|
|
return N < 0 ? 0 : N > 1 ? 1 : N;
|
|
}
|
|
|
|
function
|
|
Lerp(A, t, B)
|
|
{
|
|
return (1-t)*A + t*B;
|
|
}
|
|
|
|
function
|
|
IsOverflowed(Element)
|
|
{
|
|
return Element.scrollHeight > Element.clientHeight || Element.scrollWidth > Element.clientWidth;
|
|
}
|
|
|
|
function
|
|
SetHelpUnfocused(Button)
|
|
{
|
|
Button.firstElementChild.innerText = "¿";
|
|
Button.firstElementChild.title = "Keypresses will not pass through to Cinera because focus is currently elsewhere.\n\nTo regain focus, please press Tab / Shift-Tab (multiple times) or click somewhere related to Cinera other than the video, e.g. this button";
|
|
}
|
|
|
|
function
|
|
SetHelpFocused(Button)
|
|
{
|
|
Button.firstElementChild.innerText = "?";
|
|
Button.firstElementChild.title = ""
|
|
}
|
|
|
|
function
|
|
BindHelp(Button, DocumentationContainer)
|
|
{
|
|
window.addEventListener("blur", function(){
|
|
SetHelpUnfocused(Button);
|
|
});
|
|
|
|
window.addEventListener("focus", function(){
|
|
SetHelpFocused(Button);
|
|
});
|
|
|
|
Button.addEventListener("click", function() {
|
|
DocumentationContainer.classList.toggle("visible");
|
|
})
|
|
}
|
|
|
|
function getBackgroundColourRGB(element) {
|
|
var Colour = getComputedStyle(element).getPropertyValue("background-color");
|
|
var depth = 0;
|
|
while((Colour == "transparent" || Colour == "rgba(0, 0, 0, 0)") && element.parentElement && depth <= 4)
|
|
{
|
|
element = element.parentElement;
|
|
Colour = getComputedStyle(element).getPropertyValue("background-color");
|
|
++depth;
|
|
}
|
|
var Staging = Colour.slice(Colour.indexOf("(") + 1, -1).split(", ");
|
|
var Result = {
|
|
R: parseInt(Staging[0]),
|
|
G: parseInt(Staging[1]),
|
|
B: parseInt(Staging[2]),
|
|
};
|
|
return Result;
|
|
}
|
|
|
|
function getBackgroundBrightness(element) {
|
|
var Colour = getBackgroundColourRGB(element);
|
|
var Result = Math.sqrt(Colour.R * Colour.R * .241 +
|
|
Colour.G * Colour.G * .691 +
|
|
Colour.B * Colour.B * .068);
|
|
return Result;
|
|
}
|
|
|
|
function setTextLightness(textElement)
|
|
{
|
|
var textHue = textElement.getAttribute("data-hue");
|
|
var textSaturation = textElement.getAttribute("data-saturation");
|
|
if(textHue && textSaturation)
|
|
{
|
|
if(getBackgroundBrightness(textElement.parentNode) < 127)
|
|
{
|
|
textElement.style.color = ("hsl(" + textHue + ", " + textSaturation + ", 76%)");
|
|
}
|
|
else
|
|
{
|
|
textElement.style.color = ("hsl(" + textHue + ", " + textSaturation + ", 24%)");
|
|
}
|
|
}
|
|
}
|
|
|
|
function setDotLightness(topicDot)
|
|
{
|
|
var dotHue = topicDot.getAttribute("data-hue");
|
|
var dotSaturation = topicDot.getAttribute("data-saturation");
|
|
if(dotHue && dotSaturation)
|
|
{
|
|
if(getBackgroundBrightness(topicDot.parentNode) < 127)
|
|
{
|
|
topicDot.style.backgroundColor = ("hsl(" + dotHue + ", " + dotSaturation + ", 76%)");
|
|
topicDot.style.borderColor = ("hsl(" + dotHue + ", " + dotSaturation + ", 76%)");
|
|
}
|
|
else
|
|
{
|
|
topicDot.style.backgroundColor = ("hsl(" + dotHue + ", " + dotSaturation + ", 47%)");
|
|
topicDot.style.borderColor = ("hsl(" + dotHue + ", " + dotSaturation + ", 47%)");
|
|
}
|
|
}
|
|
}
|