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// Some Levenshtein-distnace code
// http://www.merriampark.com/ld.htm, http://www.mgilleland.com/ld/ldjavascript.htm, Damerau–Levenshtein distance (Wikipedia)
var levDist = function(s, t) {
var d = [] //2d matrix
// Step 1
var n = s.length
var m = t.length
if (n == 0) return m
if (m == 0) return n
// Create an array of arrays in javascript (a descending loop is quicker)
for (var i = n; i >= 0; i--) d[i] = []
// Step 2
for (var i = n; i >= 0; i--) d[i][0] = i
for (var j = m; j >= 0; j--) d[0][j] = j
// Step 3
for (var i = 1; i <= n; i++) {
var s_i = s.charAt(i - 1)
// Step 4
for (var j = 1; j <= m; j++) {
// Check the jagged ld total so far
if (i == j && d[i][j] > 4) return n
var t_j = t.charAt(j - 1)
var cost = s_i == t_j ? 0 : 1 // Step 5
// Calculate the minimum
var mi = d[i - 1][j] + 1
var b = d[i][j - 1] + 1
var c = d[i - 1][j - 1] + cost
if (b < mi) mi = b
if (c < mi) mi = c
d[i][j] = mi // Step 6
// Damerau transposition
if (
i > 1 &&
j > 1 &&
s_i == t.charAt(j - 2) &&
s.charAt(i - 2) == t_j
) {
d[i][j] = Math.min(d[i][j], d[i - 2][j - 2] + cost)
}
}
}
// Step 7
return d[n][m]
}
var things = {}
$(function() {
var marker
var Icon = L.icon({
iconUrl: "leaflet/images/marker-icon-red.png",
iconSize: [25, 41],
iconAnchor: [12, 41],
popupAnchor: [1, -34],
shadowSize: [41, 41],
shadowUrl: "leaflet/images/marker-shadow.png",
})
var res = $("#result")
var search = $("#searchtext")
function performSearch() {
var searchstring = search.val().toLowerCase()
var searchresult = Object.keys(things).sort(function(a, b) {
return (
levDist(searchstring, a.toLowerCase()) -
levDist(searchstring, b.toLowerCase())
)
})
var html = ""
for (var i = 0; i < Math.min(searchresult.length, 10); i++) {
html += "<li>" + searchresult[i] + "</li>"
}
if (html != "") res.show()
else res.hide()
if (things[search]) {
addMarker(things[search])
$("#btnmarker").addClass("active")
setHash()
}
$("#result ul").html(html)
$("#result ul li:first").addClass("selected")
$("#result ul li").click(function() {
select($(this).text())
})
res.css({
top: search.position().top + search.height() + 10,
left: search.position().left,
})
}
function select(text) {
addMarker(things[text])
$("#btnmarker").addClass("active")
setHash()
res.hide()
}
$("#searchtext").keypress(function(e) {
switch (e.keyCode) {
case 13: // Enter
var selected = $("#result ul li.selected").first()
if (selected) selected.click()
break
default:
setTimeout(performSearch, 10)
}
})
var map = L.map("map", {
minZoom: 0,
maxZoom: 4,
zoom: 2,
center: [0, 0],
})
L.tileLayer("/tiles/{z}/{x}/{y}.jpg", {
attribution:
'Original project by <a href="https://github.com/blinry/">blinry<a> (<a href="https://github.com/blinry/map.recurse.com">source</a>) | <a href="#">Source</a>',
noWrap: true,
detectRetina: true,
}).addTo(map)
$("#btnmarker").on("click", function(event) {
setTimeout(function() {
var button = $(event.currentTarget)
if (button.hasClass("active")) {
addMarker()
} else {
removeMarker()
}
}, 0)
})
setTimeout(getHash, 0)
function getHash() {
var hash = window.location.hash
if (hash) {
hash = hash.match(/([\-0-9]*)_([\-0-9]*)/)
if (hash) {
var pos = [
parseInt(hash[1], 10) / 1000,
parseInt(hash[2], 10) / 1000,
]
addMarker(pos)
$("#btnmarker").addClass("active")
}
}
}
function addMarker(pos) {
removeMarker()
if (pos) {
map.setView(pos, 2)
marker = L.marker(pos, {
icon: Icon,
})
marker.addTo(map)
} else {
marker = L.marker(map.getCenter(), {
draggable: true,
opacity: 0.7,
icon: Icon,
})
marker.on("dragend", setHash)
setHash()
marker.addTo(map)
}
}
function removeMarker() {
if (marker) {
map.removeLayer(marker)
marker = false
setHash()
}
}
function setHash() {
if (marker) {
var pos = marker.getLatLng()
pos = [
(1000 * pos.lat).toFixed(0),
(1000 * pos.lng).toFixed(0),
].join("_")
window.location.hash = pos
} else {
window.location.hash = ""
}
}
})
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