X-Git-Url: https://git.openstreetmap.org./rails.git/blobdiff_plain/ef40b61ff40881966ae4280cfdcb9f92965e9d10..7bf44e6870ba3448080a5453a43799562174ae48:/public/javascripts/site.js diff --git a/public/javascripts/site.js b/public/javascripts/site.js index 43cca261c..813b3ae92 100644 --- a/public/javascripts/site.js +++ b/public/javascripts/site.js @@ -1,4 +1,3 @@ - /* * Called as the user scrolls/zooms around to aniplate hrefs of the * view tab and various other links @@ -10,89 +9,55 @@ function updatelinks(lon,lat,zoom,layers,minlon,minlat,maxlon,maxlat,objtype,obj 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); @@ -103,10 +68,8 @@ function updatelinks(lon,lat,zoom,layers,minlon,minlat,maxlon,maxlat,objtype,obj 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 { @@ -214,33 +177,45 @@ function i18n(string, keys) { 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; }