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// Common functionality for PLT documentation pages
// Page Parameters ------------------------------------------------------------
var page_query_string =
(location.href.search(/\?([^#]+)(?:#|$)/) >= 0) && RegExp.$1;
var page_args =
((function(){
if (!page_query_string) return [];
var args = page_query_string.split(/[&;]/);
for (var i=0; i<args.length; i++) {
var a = args[i];
var p = a.indexOf('=');
if (p >= 0) args[i] = [a.substring(0,p), a.substring(p+1)];
else args[i] = [a, false];
}
return args;
})());
function GetPageArg(key, def) {
for (var i=0; i<page_args.length; i++)
if (page_args[i][0] == key) return unescape(page_args[i][1]);
return def;
}
function MergePageArgsIntoLink(a) {
if (page_args.length == 0 ||
(!a.attributes["data-pltdoc"]) || (a.attributes["data-pltdoc"].value == ""))
return;
a.href.search(/^([^?#]*)(?:\?([^#]*))?(#.*)?$/);
if (RegExp.$2.length == 0) {
a.href = RegExp.$1 + "?" + page_query_string + RegExp.$3;
} else {
// need to merge here, precedence to arguments that exist in `a'
var i, j;
var prefix = RegExp.$1, str = RegExp.$2, suffix = RegExp.$3;
var args = str.split(/[&;]/);
for (i=0; i<args.length; i++) {
j = args[i].indexOf('=');
if (j) args[i] = args[i].substring(0,j);
}
var additions = "";
for (i=0; i<page_args.length; i++) {
var exists = false;
for (j=0; j<args.length; j++)
if (args[j] == page_args[i][0]) { exists = true; break; }
if (!exists) str += "&" + page_args[i][0] + "=" + page_args[i][1];
}
a.href = prefix + "?" + str + suffix;
}
}
// Cookies --------------------------------------------------------------------
function GetCookie(key, def) {
var i, cookiestrs;
try {
if (document.cookie.length <= 0) return def;
cookiestrs = document.cookie.split(/; */);
} catch (e) { return def; }
for (i = 0; i < cookiestrs.length; i++) {
var cur = cookiestrs[i];
var eql = cur.indexOf('=');
if (eql >= 0 && cur.substring(0,eql) == key)
return unescape(cur.substring(eql+1));
}
return def;
}
function SetCookie(key, val) {
var d = new Date();
d.setTime(d.getTime()+(365*24*60*60*1000));
try {
document.cookie =
key + "=" + escape(val) + "; expires="+ d.toGMTString() + "; path=/";
} catch (e) {}
}
// note that this always stores a directory name, ending with a "/"
function SetPLTRoot(ver, relative) {
var root = location.protocol + "//" + location.host
+ NormalizePath(location.pathname.replace(/[^\/]*$/, relative));
SetCookie("PLT_Root."+ver, root);
}
// adding index.html works because of the above
function GotoPLTRoot(ver, relative) {
var u = GetCookie("PLT_Root."+ver, null);
if (u == null) return true; // no cookie: use plain up link
// the relative path is optional, default goes to the toplevel start page
if (!relative) relative = "index.html";
location = u + relative;
return false;
}
// Utilities ------------------------------------------------------------------
var normalize_rxs = [/\/\/+/g, /\/\.(\/|$)/, /\/[^\/]*\/\.\.(\/|$)/];
function NormalizePath(path) {
var tmp, i;
for (i = 0; i < normalize_rxs.length; i++)
while ((tmp = path.replace(normalize_rxs[i], "/")) != path) path = tmp;
return path;
}
// `noscript' is problematic in some browsers (always renders as a
// block), use this hack instead (does not always work!)
// document.write("<style>mynoscript { display:none; }</style>");
// Interactions ---------------------------------------------------------------
function DoSearchKey(event, field, ver, top_path) {
var val = field.value;
if (event && event.keyCode == 13) {
var u = GetCookie("PLT_Root."+ver, null);
if (u == null) u = top_path; // default: go to the top path
u += "search/index.html?q=" + escape(val);
if (page_query_string) u += "&" + page_query_string;
location = u;
return false;
}
return true;
}
function TocviewToggle(glyph, id) {
var s = document.getElementById(id).style;
var expand = s.display == "none";
s.display = expand ? "block" : "none";
glyph.innerHTML = expand ? "▼" : "►";
}
// Page Init ------------------------------------------------------------------
// Note: could make a function that inspects and uses window.onload to chain to
// a previous one, but this file needs to be required first anyway, since it
// contains utilities for all other files.
var on_load_funcs = [];
function AddOnLoad(fun) { on_load_funcs.push(fun); }
window.onload = function() {
for (var i=0; i<on_load_funcs.length; i++) on_load_funcs[i]();
};
AddOnLoad(function(){
var links = document.getElementsByTagName("a");
for (var i=0; i<links.length; i++) MergePageArgsIntoLink(links[i]);
var label = GetPageArg("ctxtname",false);
if (!label) return;
var indicator = document.getElementById("contextindicator");
if (!indicator) return;
indicator.innerHTML = label;
indicator.style.display = "block";
});
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