atlas/web/_js/main/view.js

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/*
========================================================================
The 2022 /r/place Atlas
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An atlas of Reddit's 2022 /r/place, with information to each
artwork of the canvas provided by the community.
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Copyright (c) 2017 Roland Rytz <roland@draemm.li>
Copyright (c) 2022 Place Atlas contributors
Licensed under the GNU Affero General Public License Version 3
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https://place-atlas.stefanocoding.me/license.txt
========================================================================
*/
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const linesCanvas = document.getElementById("linesCanvas")
const linesContext = linesCanvas.getContext("2d")
let hovered = []
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let previousZoomOrigin = [0, 0]
let previousScaleZoomOrigin = [0, 0]
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const backgroundCanvas = document.createElement("canvas")
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backgroundCanvas.width = canvasSize.x
backgroundCanvas.height = canvasSize.y
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const backgroundContext = backgroundCanvas.getContext("2d")
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const wrapper = document.getElementById("wrapper")
const bottomBar = document.getElementById("bottomBar")
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const showListButton = document.getElementById("showListButton")
const offcanvasList = document.getElementById("offcanvasList")
const bsOffcanvasList = new bootstrap.Offcanvas(offcanvasList)
const offcanvasDraw = document.getElementById("offcanvasDraw")
const bsOffcanvasDraw = new bootstrap.Offcanvas(offcanvasDraw)
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const objectsContainer = document.getElementById("objectsList")
const closeObjectsListButton = document.getElementById("closeObjectsListButton")
const objectsListOverflowNotice = document.getElementById("objectsListOverflowNotice")
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const filterInput = document.getElementById("searchList")
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const entriesList = document.getElementById("entriesList")
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let entriesListShown = false
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const drawButton = document.getElementById("drawLink")
const objectEditNav = document.createElement("a")
objectEditNav.className = "btn btn-outline-primary"
objectEditNav.id = "objectEditNav"
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objectEditNav.textContent = "Edit"
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let sortedAtlas
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const entriesLimit = 50
let entriesOffset = 0
const moreEntriesButton = document.createElement("button")
moreEntriesButton.innerHTML = "Show " + entriesLimit + " more"
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moreEntriesButton.type = "button"
moreEntriesButton.className = "btn btn-primary d-block mb-2 mx-auto"
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moreEntriesButton.id = "moreEntriesButton"
moreEntriesButton.onclick = function () {
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buildObjectsList(null, null)
renderBackground()
render()
}
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let defaultSort = "shuffle"
document.getElementById("sort").value = defaultSort
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let lastPos = [0, 0]
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let fixed = false; // Fix hovered items in place, so that clicking on links is possible
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filterInput.addEventListener("input", function () {
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entriesOffset = 0
entriesList.replaceChildren()
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entriesList.appendChild(moreEntriesButton)
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if (this.value === "") {
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document.getElementById("relevantOption").disabled = true
sortedAtlas = atlas.concat()
buildObjectsList(null, null)
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} else {
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document.getElementById("relevantOption").disabled = false
buildObjectsList(this.value.toLowerCase(), "relevant")
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}
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})
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document.getElementById("sort").addEventListener("input", function () {
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if (this.value !== "relevant") {
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defaultSort = this.value
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}
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resetEntriesList(filterInput.value.toLowerCase(), this.value)
})
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offcanvasDraw.addEventListener('show.bs.offcanvas', function () {
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wrapper.classList.remove('listHidden')
wrapper.classList.add('listTransitioning')
applyView()
})
offcanvasDraw.addEventListener('shown.bs.offcanvas', function () {
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wrapper.classList.remove('listTransitioning')
applyView()
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})
offcanvasDraw.addEventListener('hide.bs.offcanvas', function () {
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wrapper.classList.add('listHidden')
wrapper.classList.add('listTransitioning')
applyView()
})
offcanvasDraw.addEventListener('hidden.bs.offcanvas', function () {
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wrapper.classList.remove('listTransitioning')
applyView()
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})
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offcanvasList.addEventListener('show.bs.offcanvas', function () {
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wrapper.classList.remove('listHidden')
wrapper.classList.add('listTransitioning')
applyView()
})
offcanvasList.addEventListener('shown.bs.offcanvas', function (e) {
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entriesListShown = true
wrapper.classList.remove('listTransitioning')
updateHovering(e)
applyView()
render()
updateLines()
})
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offcanvasList.addEventListener('hide.bs.offcanvas', function () {
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wrapper.classList.add('listHidden')
wrapper.classList.add('listTransitioning')
applyView()
})
offcanvasList.addEventListener('hidden.bs.offcanvas', function (e) {
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entriesListShown = false
wrapper.classList.remove('listTransitioning')
updateHovering(e)
applyView()
render()
updateLines()
})
closeObjectsListButton.addEventListener("click", clearObjectsList)
bottomBar.addEventListener("mouseover", function () {
if (!fixed) clearObjectsList()
})
function clearObjectsList() {
closeObjectsListButton.classList.add("d-none")
objectsListOverflowNotice.classList.add("d-none")
entriesList.classList.remove("disableHover")
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hovered = []
objectsContainer.replaceChildren()
updateLines()
fixed = false
render()
objectEditNav.remove()
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document.title = pageTitle
}
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function toggleFixed(e, tapped) {
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if (!fixed && hovered.length === 0) {
entriesList.classList.remove("disableHover")
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return 0
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}
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fixed = !fixed
if (!fixed) {
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updateHovering(e, tapped)
render()
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}
entriesList.classList.add("disableHover")
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objectsListOverflowNotice.classList.add("d-none")
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}
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window.addEventListener("resize", updateLines)
window.addEventListener("mousemove", updateLines)
window.addEventListener("dblClick", updateLines)
window.addEventListener("wheel", updateLines)
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objectsContainer.addEventListener("scroll", function () {
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updateLines()
})
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window.addEventListener("resize", function (e) {
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applyView()
render()
updateLines()
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})
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function updateLines() {
// Line border
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linesCanvas.width = linesCanvas.clientWidth
linesCanvas.height = linesCanvas.clientHeight
linesContext.lineCap = "round"
linesContext.lineWidth = Math.max(Math.min(zoom * 1.5, 16 * 1.5), 6)
linesContext.strokeStyle = "#222"
for (let i = 0; i < hovered.length; i++) {
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const element = hovered[i].element
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if (element.getBoundingClientRect().left !== 0) {
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linesContext.beginPath()
// Align line based on which side the card is on
if ((element.getBoundingClientRect().left + element.clientWidth / 2) < (document.documentElement.clientWidth / 2)) {
linesContext.moveTo(
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element.getBoundingClientRect().left + document.documentElement.scrollLeft + element.clientWidth - 5,
element.getBoundingClientRect().top + document.documentElement.scrollTop + 20
)
} else {
linesContext.moveTo(
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element.getBoundingClientRect().left + document.documentElement.scrollLeft + 5,
element.getBoundingClientRect().top + document.documentElement.scrollTop + 20
)
}
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linesContext.lineTo(
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~~(hovered[i].center[0] * zoom) + innerContainer.offsetLeft,
~~(hovered[i].center[1] * zoom) + innerContainer.offsetTop
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)
linesContext.stroke()
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}
}
// Line body
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linesContext.lineWidth = Math.max(Math.min(zoom, 16), 4)
linesContext.strokeStyle = "#FFFFFF"
for (let i = 0; i < hovered.length; i++) {
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const element = hovered[i].element
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if (element.getBoundingClientRect().left !== 0) {
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linesContext.beginPath()
// Align line based on which side the card is on
if ((element.getBoundingClientRect().left + element.clientWidth / 2) < (document.documentElement.clientWidth / 2)) {
linesContext.moveTo(
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element.getBoundingClientRect().left + document.documentElement.scrollLeft + element.clientWidth - 5,
element.getBoundingClientRect().top + document.documentElement.scrollTop + 20
)
} else {
linesContext.moveTo(
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element.getBoundingClientRect().left + document.documentElement.scrollLeft + 5,
element.getBoundingClientRect().top + document.documentElement.scrollTop + 20
)
}
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linesContext.lineTo(
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~~(hovered[i].center[0] * zoom) + innerContainer.offsetLeft,
~~(hovered[i].center[1] * zoom) + innerContainer.offsetTop
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)
linesContext.stroke()
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}
}
}
function renderBackground(atlas) {
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backgroundContext.clearRect(0, 0, canvas.width, canvas.height)
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//backgroundCanvas.width = 1000 * zoom
//backgroundCanvas.height = 1000 * zoom
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//backgroundContext.lineWidth = zoom
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backgroundContext.fillStyle = "rgba(0, 0, 0, 0.6)"
backgroundContext.fillRect(0, 0, backgroundCanvas.width, backgroundCanvas.height)
for (let i = 0; i < atlas.length; i++) {
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const path = atlas[i].path
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backgroundContext.beginPath()
if (path[0]) {
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//backgroundContext.moveTo(path[0][0]*zoom, path[0][1]*zoom)
backgroundContext.moveTo(path[0][0], path[0][1])
}
for (let p = 1; p < path.length; p++) {
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//backgroundContext.lineTo(path[p][0]*zoom, path[p][1]*zoom)
backgroundContext.lineTo(path[p][0], path[p][1])
}
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backgroundContext.closePath()
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let bgStrokeStyle
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switch (atlas[i].diff) {
case "add":
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bgStrokeStyle = "rgba(0, 255, 0, 1)"
backgroundContext.lineWidth = 2
break
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case "edit":
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bgStrokeStyle = "rgba(255, 255, 0, 1)"
backgroundContext.lineWidth = 2
break
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case "delete":
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bgStrokeStyle = "rgba(255, 0, 0, 1)"
backgroundContext.lineWidth = 2
break
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default:
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bgStrokeStyle = "rgba(255, 255, 255, 0.8)"
break
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}
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backgroundContext.strokeStyle = bgStrokeStyle
backgroundContext.stroke()
backgroundContext.lineWidth = 1
}
}
function buildObjectsList(filter = null, sort = null) {
if (entriesList.contains(moreEntriesButton)) {
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entriesList.removeChild(moreEntriesButton)
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}
if (!sortedAtlas) {
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sortedAtlas = atlas.concat()
document.getElementById("atlasSize").innerHTML = "The Atlas contains " + sortedAtlas.length + " entries."
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}
if (filter) {
sortedAtlas = atlas.filter(entry => {
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return (
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entry.name.toLowerCase().includes(filter.toLowerCase())
|| entry.description.toLowerCase().includes(filter.toLowerCase())
|| Object.values(entry.links).flat().some(str => str.toLowerCase().includes(filter))
|| entry.id === filter
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)
})
document.getElementById("atlasSize").innerHTML = "Found " + sortedAtlas.length + " entries."
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} else {
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document.getElementById("atlasSize").innerHTML = "The Atlas contains " + sortedAtlas.length + " entries."
}
if (sort === null) {
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sort = defaultSort
}
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renderBackground(sortedAtlas)
render()
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document.getElementById("sort").value = sort
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//console.log(sort)
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let sortFunction
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//console.log(sort)
switch (sort) {
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case "shuffle":
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sortFunction = null
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if (entriesOffset === 0) {
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shuffle()
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}
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break
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case "alphaAsc":
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sortFunction = (a, b) => a.name.toLowerCase().localeCompare(b.name.toLowerCase())
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break
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case "alphaDesc":
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sortFunction = (a, b) => b.name.toLowerCase().localeCompare(a.name.toLowerCase())
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break
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case "newest":
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sortFunction = (a, b) => b.id.length - a.id.length || b.id.localeCompare(a.id)
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break
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case "oldest":
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sortFunction = (a, b) => a.id.length - b.id.length || a.id.localeCompare(b.id)
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break
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case "area":
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sortFunction = (a, b) => calcPolygonArea(b.path) - calcPolygonArea(a.path)
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break
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case "relevant":
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sortFunction = (a, b) => {
if (a.name.toLowerCase().includes(filter) && b.name.toLowerCase().includes(filter)) {
return a.name.toLowerCase().indexOf(filter) - b.name.toLowerCase().indexOf(filter) || a.name.toLowerCase().localeCompare(b.name.toLowerCase())
} else if (a.name.toLowerCase().includes(filter)) {
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return -1
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} else if (b.name.toLowerCase().includes(filter)) {
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return 1
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} else {
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return a.description.toLowerCase().indexOf(filter) - b.description.toLowerCase().indexOf(filter) || a.name.toLowerCase().localeCompare(b.name.toLowerCase())
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}
}
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break
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}
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if (sortFunction) {
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sortedAtlas.sort(sortFunction)
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}
for (let i = entriesOffset; i < entriesOffset + entriesLimit; i++) {
if (i >= sortedAtlas.length) {
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break
}
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const element = createInfoBlock(sortedAtlas[i])
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element.entry = sortedAtlas[i]
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element.addEventListener("mouseenter", function () {
if (!fixed && !dragging) {
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objectsContainer.replaceChildren()
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previousZoomOrigin = [zoomOrigin[0], zoomOrigin[1]]
previousScaleZoomOrigin = [scaleZoomOrigin[0], scaleZoomOrigin[1]]
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applyView()
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zoomOrigin = [
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innerContainer.clientWidth / 2 - this.entry.center[0] * zoom, // + container.offsetLeft
innerContainer.clientHeight / 2 - this.entry.center[1] * zoom // + container.offsetTop
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]
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scaleZoomOrigin = [
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canvasCenter.x - this.entry.center[0],
canvasCenter.y - this.entry.center[1]
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]
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//console.log(zoomOrigin)
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applyView()
hovered = [this.entry]
render()
hovered[0].element = this
updateLines()
}
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})
element.addEventListener("click", function (e) {
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toggleFixed(e)
if (fixed) {
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previousZoomOrigin = [zoomOrigin[0], zoomOrigin[1]]
previousScaleZoomOrigin = [scaleZoomOrigin[0], scaleZoomOrigin[1]]
applyView()
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}
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})
element.addEventListener("mouseleave", function () {
if (!fixed && !dragging) {
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zoomOrigin = [previousScaleZoomOrigin[0] * zoom, previousScaleZoomOrigin[1] * zoom]
scaleZoomOrigin = [previousScaleZoomOrigin[0], previousScaleZoomOrigin[1]]
applyView()
hovered = []
updateLines()
render()
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}
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})
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entriesList.appendChild(element)
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}
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entriesOffset += entriesLimit
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if (sortedAtlas.length > entriesOffset) {
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moreEntriesButton.innerHTML = "Show " + Math.min(entriesLimit, sortedAtlas.length - entriesOffset) + " more"
entriesList.appendChild(moreEntriesButton)
}
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}
function shuffle() {
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//console.log("shuffled atlas")
for (let i = sortedAtlas.length - 1; i > 0; i--) {
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const j = Math.floor(Math.random() * (i + 1))
const temp = sortedAtlas[i]
sortedAtlas[i] = sortedAtlas[j]
sortedAtlas[j] = temp
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}
}
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function resetEntriesList() {
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entriesOffset = 0
entriesList.replaceChildren()
entriesList.appendChild(moreEntriesButton)
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buildObjectsList(filter = null, sort = null)
}
async function render() {
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context.clearRect(0, 0, canvas.width, canvas.height)
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//canvas.width = 1000*zoom
//canvas.height = 1000*zoom
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context.globalCompositeOperation = "source-over"
context.clearRect(0, 0, canvas.width, canvas.height)
if (hovered.length > 0) {
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container.style.cursor = "pointer"
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} else {
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container.style.cursor = "default"
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}
for (let i = 0; i < hovered.length; i++) {
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const path = hovered[i].path
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context.beginPath()
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if (path[0]) {
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//context.moveTo(path[0][0]*zoom, path[0][1]*zoom)
context.moveTo(path[0][0], path[0][1])
}
for (let p = 1; p < path.length; p++) {
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//context.lineTo(path[p][0]*zoom, path[p][1]*zoom)
context.lineTo(path[p][0], path[p][1])
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}
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context.closePath()
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context.globalCompositeOperation = "source-over"
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context.fillStyle = "rgba(0, 0, 0, 1)"
context.fill()
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}
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context.globalCompositeOperation = "source-out"
context.drawImage(backgroundCanvas, 0, 0)
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if (hovered.length === 1 && hovered[0].path.length && hovered[0].overrideImage) {
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const undisputableHovered = hovered[0]
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// Find the left-topmost point of all the paths
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const entryPosition = getPositionOfEntry(undisputableHovered)
if (entryPosition) {
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const [startX, startY] = entryPosition
const overrideImage = new Image()
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const loadingPromise = new Promise((res, rej) => {
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overrideImage.onerror = rej
overrideImage.onload = res
})
overrideImage.src = "imageOverrides/" + undisputableHovered.overrideImage
try {
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await loadingPromise
context.globalCompositeOperation = "source-over"
context.drawImage(overrideImage, startX, startY)
} catch (ex) {
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console.error("Cannot override image.", ex)
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}
}
}
for (let i = 0; i < hovered.length; i++) {
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const path = hovered[i].path
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context.beginPath()
if (path[0]) {
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//context.moveTo(path[0][0]*zoom, path[0][1]*zoom)
context.moveTo(path[0][0], path[0][1])
}
for (let p = 1; p < path.length; p++) {
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//context.lineTo(path[p][0]*zoom, path[p][1]*zoom)
context.lineTo(path[p][0], path[p][1])
}
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context.closePath()
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context.globalCompositeOperation = "source-over"
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let hoverStrokeStyle
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switch (hovered[i].diff) {
case "add":
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hoverStrokeStyle = "rgba(0, 155, 0, 1)"
break
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case "edit":
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hoverStrokeStyle = "rgba(155, 155, 0, 1)"
break
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default:
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hoverStrokeStyle = "rgba(0, 0, 0, 1)"
break
}
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context.strokeStyle = hoverStrokeStyle
//context.lineWidth = zoom
context.stroke()
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}
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}
function updateHovering(e, tapped) {
if (dragging || (fixed && !tapped)) return
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const pos = [
(e.clientX - (container.clientWidth / 2 - innerContainer.clientWidth / 2 + zoomOrigin[0] + container.offsetLeft)) / zoom,
(e.clientY - (container.clientHeight / 2 - innerContainer.clientHeight / 2 + zoomOrigin[1] + container.offsetTop)) / zoom
]
const coords_p = document.getElementById("coords_p")
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// Displays coordinates as zero instead of NaN
if (isNaN(pos[0]) === true) {
coords_p.textContent = "0, 0"
} else {
coords_p.textContent = Math.ceil(pos[0]) + ", " + Math.ceil(pos[1])
}
if (!(pos[0] <= 2200 && pos[0] >= -100 && pos[0] <= 2200 && pos[0] >= -100)) return
const newHovered = []
for (let i = 0; i < atlas.length; i++) {
if (pointIsInPolygon(pos, atlas[i].path)) {
newHovered.push(atlas[i])
}
}
let changed = false
if (hovered.length === newHovered.length) {
for (let i = 0; i < hovered.length; i++) {
if (hovered[i].id !== newHovered[i].id) {
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changed = true
break
}
}
} else {
changed = true
}
if (!changed) return
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hovered = newHovered.sort(function (a, b) {
return calcPolygonArea(a.path) - calcPolygonArea(b.path)
})
objectsContainer.replaceChildren()
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for (const i in hovered) {
const element = createInfoBlock(hovered[i])
objectsContainer.appendChild(element)
hovered[i].element = element
}
if (hovered.length > 0) {
document.getElementById("timeControlsSlider").blur()
closeObjectsListButton.classList.remove("d-none")
if ((objectsContainer.scrollHeight > objectsContainer.clientHeight) && !tapped) {
objectsListOverflowNotice.classList.remove("d-none")
} else {
objectsListOverflowNotice.classList.add("d-none")
}
} else {
closeObjectsListButton.classList.add("d-none")
objectsListOverflowNotice.classList.add("d-none")
entriesList.classList.remove("disableHover")
}
render()
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}
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window.addEventListener("hashchange", highlightEntryFromUrl)
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function highlightEntryFromUrl() {
const hash = window.location.hash.substring(1); //Remove hash prefix
const [id, period] = hash.split('/')
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let targetPeriod, targetVariation
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if (period) {
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[, targetPeriod, targetVariation] = parsePeriod(period)
} else {
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targetPeriod = defaultPeriod
targetVariation = defaultVariation
}
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updateTime(targetPeriod, targetVariation, true)
if (!id) return
const entries = atlas.filter(function (e) {
return e.id === id
})
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if (entries.length !== 1) return
const entry = entries[0]
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let boundingBox = [canvasSize.x, 0, canvasSize.y, 0]
entry.path?.forEach(([x, y]) => {
boundingBox[0] = Math.min(boundingBox[0], x)
boundingBox[1] = Math.max(boundingBox[1], x)
boundingBox[2] = Math.min(boundingBox[2], y)
boundingBox[3] = Math.max(boundingBox[3], y)
})
const boundingBoxSize = [boundingBox[1] - boundingBox[0], boundingBox[3] - boundingBox[2]]
const clientSize = [
Math.max(document.documentElement.clientWidth || 0, window.innerWidth || 0),
Math.max(document.documentElement.clientHeight || 0, window.innerHeight || 0)
]
zoom = Math.min(clientSize[0] / boundingBoxSize[0], clientSize[1] / boundingBoxSize[1])
zoom = Math.min(4, zoom/2)
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document.title = entry.name + " on " + pageTitle
if ((!entry.diff || entry.diff !== "delete")) {
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objectEditNav.href = "./?mode=draw&id=" + id
objectEditNav.title = "Edit " + entry.name
if (!objectEditNav.isConnected) {
showListButton.parentElement.appendChild(objectEditNav)
}
} else if (entry.diff === "delete" && document.getElementById("objectEditNav")) {
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objectEditNav.remove()
}
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const infoElement = createInfoBlock(entry)
objectsContainer.replaceChildren()
objectsContainer.appendChild(infoElement)
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renderBackground(atlas)
applyView()
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zoomOrigin = [
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innerContainer.clientWidth / 2 - entry.center[0] * zoom, // + container.offsetLeft
innerContainer.clientHeight / 2 - entry.center[1] * zoom // + container.offsetTop
]
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scaleZoomOrigin = [
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canvasCenter.x - entry.center[0], // + container.offsetLeft
canvasCenter.y - entry.center[1] // + container.offsetTop
]
closeObjectsListButton.classList.remove("d-none")
entriesList.classList.add("disableHover")
applyView()
hovered = [entry]
render()
hovered[0].element = infoElement
updateLines()
fixed = true
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}
function initView() {
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buildObjectsList(null, null)
renderBackground(atlas)
render()
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document.addEventListener('timeupdate', () => {
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sortedAtlas = atlas.concat()
resetEntriesList(null, null)
})
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// parse linked atlas entry id from link hash
/*if (window.location.hash.substring(3)){
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zoom = 4
applyView()
highlightEntryFromUrl()
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}*/
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applyView()
render()
updateLines()
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}
function initExplore() {
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window.updateHovering = updateHovering
window.render = function () { }
function updateHovering(e, tapped) {
if (!dragging && (!fixed || tapped)) {
const pos = [
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(e.clientX - (container.clientWidth / 2 - innerContainer.clientWidth / 2 + zoomOrigin[0] + container.offsetLeft)) / zoom,
(e.clientY - (container.clientHeight / 2 - innerContainer.clientHeight / 2 + zoomOrigin[1] + container.offsetTop)) / zoom
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]
const coords_p = document.getElementById("coords_p")
// Displays coordinates as zero instead of NaN
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if (isNaN(pos[0]) === true) {
coords_p.textContent = "0, 0"
} else {
coords_p.textContent = Math.ceil(pos[0]) + ", " + Math.ceil(pos[1])
}
}
}
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renderBackground(atlas)
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applyView()
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}
function initGlobal() {
container.addEventListener("mousemove", function (e) {
if (e.sourceCapabilities) {
if (!e.sourceCapabilities.firesTouchEvents) {
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updateHovering(e)
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}
} else {
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updateHovering(e)
}
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})
document.addEventListener('timeupdate', (event) => {
let hashData = window.location.hash.substring(1).split('/')
const targetHash = formatHash(hashData[0], event.detail.period, event.detail.period, event.detail.variation)
if (location.hash !== targetHash) history.replaceState({}, "", targetHash)
})
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}
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function initViewGlobal() {
container.addEventListener("mousedown", function (e) {
lastPos = [
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e.clientX,
e.clientY
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]
})
container.addEventListener("touchstart", function (e) {
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if (e.touches.length === 1) {
lastPos = [
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e.touches[0].clientX,
e.touches[0].clientY
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]
}
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}, { passive: true })
container.addEventListener("mouseup", function (e) {
if (Math.abs(lastPos[0] - e.clientX) + Math.abs(lastPos[1] - e.clientY) <= 4) {
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toggleFixed(e)
}
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})
container.addEventListener("touchend", function (e) {
e.preventDefault()
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//console.log(e)
//console.log(e.changedTouches[0].clientX)
if (e.changedTouches.length !== 1) return
e = e.changedTouches[0]
//console.log(lastPos[0] - e.clientX)
if (Math.abs(lastPos[0] - e.clientX) + Math.abs(lastPos[1] - e.clientY) > 4)
//console.log("Foo!!")
dragging = false
fixed = false
setTimeout(function () {
updateHovering(e, true)
}, 10)
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})
if (window.location.hash) { // both "/" and just "/#" will be an empty hash string
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highlightEntryFromUrl()
}
document.addEventListener('timeupdate', (event) => {
drawButton.href = "./?mode=draw" + formatHash(undefined, event.detail.period, event.detail.period, event.detail.variation)
})
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}