-
/*
* Called as the user scrolls/zooms around to aniplate hrefs of the
* view tab and various other links
lat = Math.round(lat * decimals) / decimals;
lon = Math.round(lon * decimals) / decimals;
- node = document.getElementById("permalinkanchor");
- if (node) {
- var args = getArgs(node.href);
- args["lat"] = lat;
- args["lon"] = lon;
- args["zoom"] = zoom;
- if (layers) {
- args["layers"] = layers;
- }
- if (objtype && objid) {
- args[objtype] = objid;
- }
- node.href = setArgs(node.href, args);
+ if (minlon) {
+ minlon = Math.round(minlon * decimals) / decimals;
+ minlat = Math.round(minlat * decimals) / decimals;
+ maxlon = Math.round(maxlon * decimals) / decimals;
+ maxlat = Math.round(maxlat * decimals) / decimals;
}
- node = document.getElementById("viewanchor");
- if (node) {
- var args = getArgs(node.href);
- args["lat"] = lat;
- args["lon"] = lon;
- args["zoom"] = zoom;
- if (layers) {
- args["layers"] = layers;
- }
- node.href = setArgs(node.href, args);
- }
-
- node = document.getElementById("exportanchor");
- if (node) {
- var args = getArgs(node.href);
- args["lat"] = lat;
- args["lon"] = lon;
- args["zoom"] = zoom;
- if (layers) {
- args["layers"] = layers;
- }
- node.href = setArgs(node.href, args);
- }
+ $$(".geolink").each(function (link) {
+ var args = getArgs(link.href);
- node = document.getElementById("editanchor");
- if (node) {
- if (zoom >= 13) {
- var args = new Object();
+ if (link.hasClassName("llz")) {
args.lat = lat;
args.lon = lon;
args.zoom = zoom;
- if (objtype && objid) {
- args[objtype] = objid;
- }
- node.href = setArgs("/edit", args);
- node.style.fontStyle = 'normal';
- } else {
- node.href = 'javascript:alert(i18n("javascripts.site.edit_zoom_alert"));';
- node.style.fontStyle = 'italic';
+ } else if (minlon && link.hasClassName("bbox")) {
+ args.bbox = minlon + "," + minlat + "," + maxlon + "," + maxlat;
}
- }
- node = document.getElementById("historyanchor");
- if (node) {
- if (zoom >= 11) {
- var args = new Object();
- //set bbox param from 'extents' object
- if (typeof minlon == "number" &&
- typeof minlat == "number" &&
- typeof maxlon == "number" &&
- typeof maxlat == "number") {
-
- minlon = Math.round(minlon * decimals) / decimals;
- minlat = Math.round(minlat * decimals) / decimals;
- maxlon = Math.round(maxlon * decimals) / decimals;
- maxlat = Math.round(maxlat * decimals) / decimals;
- args.bbox = minlon + "," + minlat + "," + maxlon + "," + maxlat;
- }
+ if (layers && link.hasClassName("layers")) {
+ args.layers = layers;
+ }
- node.href = setArgs("/history", args);
- node.style.fontStyle = 'normal';
- } else {
- node.href = 'javascript:alert(i18n("javascripts.site.history_zoom_alert"));';
- node.style.fontStyle = 'italic';
+ if (objtype && link.hasClassName("object")) {
+ args[objtype] = objid;
}
- }
- node = document.getElementById("shortlinkanchor");
+ if (link.hasClassName("minzoom[0-9]+")) {
+ $w(link.className).each(function (classname) {
+ if (match = classname.match(/^minzoom([0-9]+)$/)) {
+ var minzoom = match[1];
+ var name = link.id.replace(/anchor$/, "");
+
+ if (zoom >= minzoom) {
+ link.onclick = null;
+ link.title = i18n("javascripts.site." + name + "_tooltip");
+ link.removeClassName("disabled");
+ } else {
+ link.onclick = function () { alert(i18n("javascripts.site." + name + "_zoom_alert")); return false; };
+ link.title = i18n("javascripts.site." + name + "_disabled_tooltip");
+ link.addClassName("disabled");
+ }
+ }
+ });
+ }
+
+ link.href = setArgs(link.href, args);
+ });
+
+ node = $("shortlinkanchor");
if (node) {
var args = getArgs(node.href);
var code = makeShortCode(lat, lon, zoom);
args[objtype] = objid;
}
- // This is a hack to omit the default mapnik layer (B000FTF) from
- // the shortlink. B000FTFT is then the "Object" layer which we get
- // on /?{node,way,relation}=id
- if (layers && (layers != "B000FTF") && (layers != "B000FTFT")) {
+ // This is a hack to omit the default mapnik layer from the shortlink.
+ if (layers && layers != "M") {
args["layers"] = layers;
}
else {
return string;
}
+/*
+ * Called to interlace the bits in x and y, making a Morton code.
+ */
+function interlace(x, y) {
+ x = (x | (x << 8)) & 0x00ff00ff;
+ x = (x | (x << 4)) & 0x0f0f0f0f;
+ x = (x | (x << 2)) & 0x33333333;
+ x = (x | (x << 1)) & 0x55555555;
+
+ y = (y | (y << 8)) & 0x00ff00ff;
+ y = (y | (y << 4)) & 0x0f0f0f0f;
+ y = (y | (y << 2)) & 0x33333333;
+ y = (y | (y << 1)) & 0x55555555;
+
+ return (x << 1) | y;
+}
+
+/*
+ * Called to create a short code for the short link.
+ */
function makeShortCode(lat, lon, zoom) {
char_array = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_@";
var x = Math.round((lon + 180.0) * ((1 << 30) / 90.0));
var y = Math.round((lat + 90.0) * ((1 << 30) / 45.0));
- // hack around the fact that JS apparently only allows 53-bit integers?!?
- // note that, although this reduces the accuracy of the process, it's fine for
- // z18 so we don't need to care for now.
- var c1 = 0, c2 = 0;
- for (var i = 31; i > 16; --i) {
- c1 = (c1 << 1) | ((x >> i) & 1);
- c1 = (c1 << 1) | ((y >> i) & 1);
- }
- for (var i = 16; i > 1; --i) {
- c2 = (c2 << 1) | ((x >> i) & 1);
- c2 = (c2 << 1) | ((y >> i) & 1);
- }
+ // JavaScript only has to keep 32 bits of bitwise operators, so this has to be
+ // done in two parts. each of the parts c1/c2 has 30 bits of the total in it
+ // and drops the last 4 bits of the full 64 bit Morton code.
var str = "";
+ var c1 = interlace(x >>> 17, y >>> 17), c2 = interlace((x >>> 2) & 0x7fff, (y >>> 2) & 0x7fff);
for (var i = 0; i < Math.ceil((zoom + 8) / 3.0) && i < 5; ++i) {
- digit = (c1 >> (24 - 6 * i)) & 0x3f;
- str += char_array.charAt(digit);
+ digit = (c1 >> (24 - 6 * i)) & 0x3f;
+ str += char_array.charAt(digit);
}
for (var i = 5; i < Math.ceil((zoom + 8) / 3.0); ++i) {
- digit = (c2 >> (24 - 6 * (i - 5))) & 0x3f;
- str += char_array.charAt(digit);
+ digit = (c2 >> (24 - 6 * (i - 5))) & 0x3f;
+ str += char_array.charAt(digit);
}
for (var i = 0; i < ((zoom + 8) % 3); ++i) {
- str += "-";
+ str += "-";
}
return str;
}
projects / rails.git / blobdiff