Annotation-System/cinera/cinera_pre.js

608 lines
18 KiB
JavaScript

var orientations = {
PORTRAIT: 0,
LANDSCAPE_LEFT: 90,
LANDSCAPE_RIGHT: -90,
};
function
DeriveReliableWindowDimensions()
{
// https://www.howtocreate.co.uk/tutorials/javascript/browserwindow
var Result = {
X: null,
Y: null,
};
var DisplaySettings = [];
for(var i = 0; i < document.body.children.length; ++i)
{
var Child = document.body.children[i];
DisplaySettings.push(Child.style.display);
Child.style.display = "none";
}
var Element = document.createElement("div");
Element.style.position = "fixed";
Element.style.top = 0;
Element.style.right = 0;
Element.style.bottom = 0;
Element.style.left = 0;
Element.style.zOffset = -1;
Element.style.opacity = 0;
var ElementInPlace = document.body.appendChild(Element);
Result.X = ElementInPlace.offsetWidth;
Result.Y = ElementInPlace.offsetHeight;
ElementInPlace.remove();
for(var i = 0; i < document.body.children.length; ++i)
{
var Child = document.body.children[i];
Child.style.display = DisplaySettings.shift();
}
return Result;
}
function
GetWindowDim(IsMobile)
{
var Result = {
X: null,
Y: null,
};
if(IsMobile)
{
Result = DeriveReliableWindowDimensions();
}
else
{
Result.X = document.documentElement.clientWidth;
Result.Y = document.documentElement.clientHeight;
}
return Result;
}
function IsVisible(Element, WindowDim) {
var BoundingRect = Element.getBoundingClientRect();
return ((BoundingRect.top >= 0 && BoundingRect.top <= WindowDim.Y) ||
(BoundingRect.bottom >= 0 && BoundingRect.bottom <= WindowDim.Y) ||
(BoundingRect.top < 0 && BoundingRect.bottom > WindowDim.Y))
&& ((BoundingRect.left >= 0 && BoundingRect.left <= WindowDim.X) ||
(BoundingRect.right >= 0 && BoundingRect.right <= WindowDim.X) ||
(BoundingRect.left < 0 && BoundingRect.right > WindowDim.X));
}
function
GetRealOrientation(PreferredLandscape, IsMobile)
{
var Result = window.orientation;
var WindowDim = GetWindowDim(IsMobile);
if(WindowDim.Y > WindowDim.X)
{
Result = orientations.PORTRAIT;
}
else if(Result == undefined || Result == orientations.PORTRAIT)
{
Result = PreferredLandscape;
}
return Result;
}
var DebugConsoleMessageCount = 0;
function Say(Message)
{
var DebugConsole = document.getElementById("debug-console");
if(DebugConsole)
{
DebugConsole.textContent += DebugConsoleMessageCount++ + ": " + Message + "\n";
DebugConsole.scrollTo(
{
top: DebugConsole.scrollHeight,
behavior: "smooth"
});
}
}
function getBackgroundBrightness(element) {
var colour = getComputedStyle(element).getPropertyValue("background-color");
var depth = 0;
while((colour == "transparent" || colour == "rgba(0, 0, 0, 0)") && depth <= 4)
{
element = element.parentNode;
colour = getComputedStyle(element).getPropertyValue("background-color");
++depth;
}
var rgb = colour.slice(4, -1).split(", ");
var result = Math.sqrt(rgb[0] * rgb[0] * .241 +
rgb[1] * rgb[1] * .691 +
rgb[2] * rgb[2] * .068);
return result;
}
function setSpriteLightness(spriteElement)
{
if(getBackgroundBrightness(spriteElement) < 127)
{
spriteElement.classList.add("dark");
}
else
{
spriteElement.classList.remove("dark");
}
}
function elementIsFocused(Element)
{
var Result = false;
if(Element.classList.contains("focused"))
{
Result = true;
}
while(Element.parent)
{
Element = Element.parent;
if(Element.classList.contains("focused"))
{
Result = true;
break;
}
}
return Result;
}
function focusSprite(Element)
{
if(Element.classList.contains("cineraSprite"))
{
setSpriteLightness(Element);
Element.style.backgroundPositionY = Element.getAttribute("data-y-focused") + "px";
}
for(var i = 0; i < Element.childElementCount; ++i)
{
focusSprite(Element.children[i]);
}
}
function enableSprite(Element)
{
if(Element.classList.contains("focused"))
{
focusSprite(Element);
}
else
{
if(Element.classList.contains("cineraSprite"))
{
setSpriteLightness(Element);
Element.style.backgroundPositionY = Element.getAttribute("data-y-normal") + "px";
}
for(var i = 0; i < Element.childElementCount; ++i)
{
enableSprite(Element.children[i]);
}
}
}
function disableSprite(Element)
{
if(Element.classList.contains("cineraSprite"))
{
setSpriteLightness(Element);
Element.style.backgroundPositionY = Element.getAttribute("data-y-disabled") + "px";
}
for(var i = 0; i < Element.childElementCount; ++i)
{
disableSprite(Element.children[i]);
}
}
function unfocusSprite(Element)
{
if(Element.classList.contains("off"))
{
disableSprite(Element);
}
else
{
if(Element.classList.contains("cineraSprite"))
{
setSpriteLightness(Element);
Element.style.backgroundPositionY = Element.getAttribute("data-y-normal") + "px";
}
for(var i = 0; i < Element.childElementCount; ++i)
{
unfocusSprite(Element.children[i]);
}
}
}
function IsMobile() {
// NOTE(matt): From https://medium.com/simplejs/detect-the-users-device-type-with-a-simple-javascript-check-4fc656b735e1
var Identifier = navigator.userAgent||navigator.vendor||window.opera;
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)));
return Result;
};
function GetRule(SelectorText)
{
// NOTE(matt): Modifying CSS style
// From https://stackoverflow.com/a/566445
// https://usefulangle.com/post/39/adding-css-to-stylesheet-with-javascript
var Result = undefined;
var StyleSheets = document.styleSheets;
var cssRuleCode = document.all ? 'rules' : 'cssRules'; // account for IE and FF
for(var StyleSheetIndex = StyleSheets.length - 1; StyleSheetIndex >= 0; --StyleSheetIndex)
{
var ThisSheet = StyleSheets[StyleSheetIndex];
if(ThisSheet.href !== null && ThisSheet.href.includes(location.hostname))
{
var Rules = ThisSheet[cssRuleCode];
for(var RuleIndex = Rules.length - 1; RuleIndex >= 0; --RuleIndex)
{
var ThisRule = Rules[RuleIndex];
if(SelectorText === ThisRule.selectorText)
{
Result = ThisRule;
break;
}
}
if(Result !== undefined) { break; }
}
}
return Result;
}
function
GetRulesOfStyleSheetIndex(Index)
{
var Result = undefined;
var StyleSheets = document.styleSheets;
var cssRuleCode = document.all ? 'rules' : 'cssRules'; // account for IE and FF
var StyleSheet = StyleSheets[Index];
if(StyleSheet)
{
Result = StyleSheet[cssRuleCode];
}
return Result;
}
function
GetLocalStyleSheet()
{
var Result;
var StyleSheets = document.styleSheets;
for(var StyleSheetIndex = StyleSheets.length - 1; StyleSheetIndex >= 0; --StyleSheetIndex)
{
var This = StyleSheets[StyleSheetIndex];
if(This.href !== null && This.href.includes(location.hostname) && !This.disabled)
{
Result = This;
break;
}
}
return Result;
}
function
GetOrSetRule(SelectorText)
{
var Result = GetRule(SelectorText);
if(Result === undefined)
{
var StyleSheet = GetLocalStyleSheet();
if(StyleSheet)
{
var cssRuleCode = document.all ? 'rules' : 'cssRules'; // account for IE and FF
var Rules = StyleSheet[cssRuleCode];
var RuleIndex = StyleSheet.insertRule(SelectorText + "{}", Rules.length - 1);
Result = Rules[RuleIndex];
}
}
return Result;
}
function IsInRangeEx(Min, N, Max)
{
return N > Min && N < Max;
}
/* Auto-scrolling */
var LastScrollYPos = 0;
var ScrollTicking = false;
var ScrollerFunction;
var ScrollCondition;
function ScrollTo(Element, ScrollPos, IsMobile, StickyObscuringElement) {
if(Element.offsetWidth && Element.offsetHeight)
{
var ScrolledToTop = ScrollPos == 0;
var ScrolledToBottom = (window.innerHeight + Math.ceil(window.pageYOffset)) >= document.body.scrollHeight;
if(!ScrolledToTop || !ScrolledToBottom)
{
var Ceiling = StickyObscuringElement ? StickyObscuringElement.offsetHeight : 0;
var VisibleArea = GetWindowDim(IsMobile);
VisibleArea.Y -= Ceiling;
var PercentageOfVisibleHeightToGather = 5;
var GatherableHeight = VisibleArea.Y * PercentageOfVisibleHeightToGather / 100;
var BoundingRect = Element.getBoundingClientRect();
var ElementTop = BoundingRect.top - Ceiling;
var ElementBottom = ElementTop + BoundingRect.height;
var UpperProtrusion = -ElementTop;
var LowerProtrusion = ElementBottom - VisibleArea.Y;
var DesiredScroll = null;
var YOffsetFromPage = getElementYOffsetFromPage(Element);
if(IsInRangeEx(0, UpperProtrusion, GatherableHeight))
{
if(!ScrolledToBottom)
{
DesiredScroll = YOffsetFromPage - Ceiling;
}
}
else if(IsInRangeEx(0, LowerProtrusion, GatherableHeight))
{
if(!ScrolledToTop)
{
if(IsInRangeEx(0, UpperProtrusion + LowerProtrusion, GatherableHeight))
{
DesiredScroll = YOffsetFromPage - Ceiling;
}
else
{
DesiredScroll = ScrollPos + LowerProtrusion;
}
}
}
if(DesiredScroll !== null && DesiredScroll != ScrollPos)
{
window.scrollTo({
top: DesiredScroll,
behavior: "smooth"
});
}
}
}
}
function
InitScrollEventListener(Element, IsMobile, StickyObscuringElement)
{
window.addEventListener('scroll', function() {
if(ScrollCondition == undefined || ScrollCondition == true)
{
LastScrollYPos = window.scrollY;
if (!ScrollTicking) {
window.requestAnimationFrame(function() {
clearTimeout(ScrollerFunction);
ScrollerFunction = setTimeout(ScrollTo, 2000, Element, LastScrollYPos, IsMobile, StickyObscuringElement);
ScrollTicking = false;
});
ScrollTicking = true;
}
}
});
}
/* /Auto-scrolling */
function getElementXOffsetFromPage(el) {
var left = 0;
do {
left += el.offsetLeft;
} while (el = el.offsetParent);
return left;
}
function getElementYOffsetFromPage(el) {
var top = 0;
do {
top += el.offsetTop;
} while (el = el.offsetParent);
return top;
}
function
MaxWidthOfElement(Element, WindowDim)
{
// NOTE(matt): This works fine for Elements whose natural max width fills the whole line, i.e. block elements and children
// thereof. To support inline elements, we'll need to mirror MaxHeightOfElement() and may as well roll the two
// functions into one.
var Result = 0;
var OriginalWidth = Element.style.width;
Element.style.width = "100%";
var NaturalMax = Element.offsetWidth;
Element.style.width = OriginalWidth;
var InnerWidth = WindowDim ? WindowDim.X : document.documentElement.clientWidth;
Result = Math.min(NaturalMax, InnerWidth);
return Result;
}
function
MaxHeightOfElement(Element, WindowDim)
{
var Result = 0;
var DisplaySettings = [];
for(var i = 0; i < Element.children.length; ++i)
{
var Child = Element.children[i];
DisplaySettings.push(Child.style.display);
Child.style.display = "none";
}
var OriginalHeight = Element.style.height;
Element.style.height = "100%";
var NaturalMax = Element.offsetHeight;
Element.style.height = OriginalHeight;
var InnerHeight = WindowDim ? WindowDim.Y : document.documentElement.clientHeight;
if(NaturalMax > 0)
{
Result = Math.min(NaturalMax, InnerHeight);
}
else
{
Result = InnerHeight;
}
for(var i = 0; i < Element.children.length; ++i)
{
var Child = Element.children[i];
Child.style.display = DisplaySettings.shift();
}
return Result;
}
function
MaxDimensionsOfElement(Element, WindowDim)
{
var Result = {
X: null,
Y: null,
};
Result.X = MaxWidthOfElement(Element, WindowDim);
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
BindHelp(Button, DocumentationContainer)
{
window.addEventListener("blur", function(){
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";
});
window.addEventListener("focus", function(){
Button.firstElementChild.innerText = "?";
Button.firstElementChild.title = ""
});
Button.addEventListener("click", function() {
DocumentationContainer.classList.toggle("visible");
})
}
function RGBtoHSL(colour)
{
var rgb = colour.slice(4, -1).split(", ");
var red = rgb[0];
var green = rgb[1];
var blue = rgb[2];
var min = Math.min(red, green, blue);
var max = Math.max(red, green, blue);
var chroma = max - min;
var hue = 0;
if(max == red)
{
hue = ((green - blue) / chroma) % 6;
}
else if(max == green)
{
hue = ((blue - red) / chroma) + 2;
}
else if(max == blue)
{
hue = ((red - green) / chroma) + 4;
}
var saturation = chroma / 255 * 100;
hue = (hue * 60) < 0 ? 360 + (hue * 60) : (hue * 60);
return [hue, saturation]
}
function getBackgroundColourRGB(element) {
var Colour = getComputedStyle(element).getPropertyValue("background-color");
var depth = 0;
while((Colour == "transparent" || Colour == "rgba(0, 0, 0, 0)") && depth <= 4)
{
element = element.parentNode;
Colour = getComputedStyle(element).getPropertyValue("background-color");
++depth;
}
var Staging = Colour.slice(4, -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(getBackgroundBrightness(textElement.parentNode) < 127)
{
textElement.style.color = ("hsl(" + textHue + ", " + textSaturation + ", 76%)");
}
else
{
textElement.style.color = ("hsl(" + textHue + ", " + textSaturation + ", 24%)");
}
}
function setDotLightness(topicDot)
{
var Hue = RGBtoHSL(getComputedStyle(topicDot).getPropertyValue("background-color"))[0];
var Saturation = RGBtoHSL(getComputedStyle(topicDot).getPropertyValue("background-color"))[1];
if(getBackgroundBrightness(topicDot.parentNode) < 127)
{
topicDot.style.backgroundColor = ("hsl(" + Hue + ", " + Saturation + "%, 76%)");
topicDot.style.borderColor = ("hsl(" + Hue + ", " + Saturation + "%, 76%)");
}
else
{
topicDot.style.backgroundColor = ("hsl(" + Hue + ", " + Saturation + "%, 47%)");
topicDot.style.borderColor = ("hsl(" + Hue + ", " + Saturation + "%, 47%)");
}
}