104 lines
3.6 KiB
JavaScript
104 lines
3.6 KiB
JavaScript
// Common functionality for PLT documentation pages
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// Cookies --------------------------------------------------------------------
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function GetCookie(key, def) {
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if (document.cookie.length <= 0) return def;
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var i, cookiestrs = document.cookie.split(/; */);
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for (i = 0; i < cookiestrs.length; i++) {
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var cur = cookiestrs[i];
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var eql = cur.indexOf('=');
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if (eql >= 0 && cur.substring(0,eql) == key)
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return unescape(cur.substring(eql+1));
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}
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return def;
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}
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function SetCookie(key, val) {
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var d = new Date();
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d.setTime(d.getTime()+(365*24*60*60*1000));
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document.cookie =
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key + "=" + escape(val) + "; expires="+ d.toGMTString() + "; path=/";
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}
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// note that this always stores a directory name, ending with a "/"
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function SetPLTRoot(ver, relative) {
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var root = location.protocol + "//" + location.host
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+ NormalizePath(location.pathname.replace(/[^\/]*$/, relative));
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SetCookie("PLT_Root."+ver, root);
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}
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// adding index.html works because of the above
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function GotoPLTRoot(ver, relative) {
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var u = GetCookie("PLT_Root."+ver, null);
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if (u == null) return true; // no cookie: use plain up link
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// the relative path is optional, default goes to the toplevel start page
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if (!relative) relative = "index.html";
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location = u + relative;
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return false;
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}
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// URL Parameters -------------------------------------------------------------
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// In the following functions, the `name' argument is assumed to be simple in
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// that it doesn't contain anything that isn't plain text in a regexp. (This
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// is because I don't know if there's a JS `regexp-quote' thing). Also, the
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// output value from the Get functions and the input value to the Set functions
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// is not decoded/encoded. Note that `SetArgInURL' mutates the string.
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function GetArgFromString(str, name) {
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var rx = new RegExp("(?:^|[;&])"+name+"=([^&;]*)(?:[;&]|$)");
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return rx.test(str) && RegExp.$1;
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}
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function SetArgInString(str, name, val) {
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if (str.length == 0) return name + "=" + val;
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var rx = new RegExp("^((?:|.*[;&])"+name+"=)(?:[^&;]*)([;&].*|)$");
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if (rx.test(str)) return RegExp.$1 + val + RegExp.$2;
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else return name + "=" + val + "&" + str;
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}
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function GetArgFromURL(url, name) {
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if (!url.href.search(/\?([^#]*)(?:#|$)/)) return false;
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return GetArgFromString(RegExp.$1, name);
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}
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function SetArgInURL(url, name, val) { // note: mutates the string
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url.href.search(/^([^?#]*)(?:\?([^#]*))?(#.*)?$/);
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url.href = RegExp.$1 + "?" + SetArgInString(RegExp.$2,name,val) + RegExp.$3;
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}
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// Utilities ------------------------------------------------------------------
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normalize_rxs = [/\/\/+/g, /\/\.(\/|$)/, /\/[^\/]*\/\.\.(\/|$)/];
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function NormalizePath(path) {
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var tmp, i;
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for (i = 0; i < normalize_rxs.length; i++)
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while ((tmp = path.replace(normalize_rxs[i], "/")) != path) path = tmp;
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return path;
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}
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// Interactions ---------------------------------------------------------------
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function DoSearchKey(event, field, ver, top_path) {
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var val = field.value;
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if (event && event.keyCode == 13) {
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var u = GetCookie("PLT_Root."+ver, null);
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if (u == null) u = top_path; // default: go to the top path
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location = u + "search/index.html" + "?q=" + escape(val);
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return false;
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}
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return true;
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}
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function TocviewToggle(glyph,id) {
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var s = document.getElementById(id).style;
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var expand = s.display == "none";
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s.display = expand ? "block" : "none";
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glyph.innerHTML = expand ? "▼" : "►";
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}
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// `noscript' is problematic in some browsers (always renders as a
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// block), use this hack instead (does not always work!)
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// document.write("<style>mynoscript { display:none; }</style>");
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