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344 lines
8 KiB
JavaScript
344 lines
8 KiB
JavaScript
// Haddock JavaScript utilities
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var rspace = /\s\s+/g,
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rtrim = /^\s+|\s+$/g;
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function spaced(s) { return (" " + s + " ").replace(rspace, " "); }
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function trim(s) { return s.replace(rtrim, ""); }
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function hasClass(elem, value) {
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var className = spaced(elem.className || "");
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return className.indexOf( " " + value + " " ) >= 0;
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}
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function addClass(elem, value) {
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var className = spaced(elem.className || "");
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if ( className.indexOf( " " + value + " " ) < 0 ) {
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elem.className = trim(className + " " + value);
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}
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}
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function removeClass(elem, value) {
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var className = spaced(elem.className || "");
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className = className.replace(" " + value + " ", " ");
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elem.className = trim(className);
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}
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function toggleClass(elem, valueOn, valueOff, bool) {
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if (bool == null) { bool = ! hasClass(elem, valueOn); }
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if (bool) {
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removeClass(elem, valueOff);
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addClass(elem, valueOn);
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}
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else {
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removeClass(elem, valueOn);
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addClass(elem, valueOff);
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}
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return bool;
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}
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function makeClassToggle(valueOn, valueOff)
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{
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return function(elem, bool) {
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return toggleClass(elem, valueOn, valueOff, bool);
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}
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}
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toggleShow = makeClassToggle("show", "hide");
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toggleCollapser = makeClassToggle("collapser", "expander");
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function toggleSection(id)
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{
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var b = toggleShow(document.getElementById("section." + id));
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toggleCollapser(document.getElementById("control." + id), b);
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rememberCollapsed(id, b);
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return b;
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}
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var collapsed = {};
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function rememberCollapsed(id, b)
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{
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if(b)
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delete collapsed[id]
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else
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collapsed[id] = null;
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var sections = [];
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for(var i in collapsed)
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{
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if(collapsed.hasOwnProperty(i))
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sections.push(i);
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}
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// cookie specific to this page; don't use setCookie which sets path=/
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document.cookie = "collapsed=" + escape(sections.join('+'));
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}
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function restoreCollapsed()
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{
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var cookie = getCookie("collapsed");
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if(!cookie)
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return;
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var ids = cookie.split('+');
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for(var i in ids)
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{
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if(document.getElementById("section." + ids[i]))
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toggleSection(ids[i]);
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}
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}
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function setCookie(name, value) {
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document.cookie = name + "=" + escape(value) + ";path=/;";
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}
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function clearCookie(name) {
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document.cookie = name + "=;path=/;expires=Thu, 01-Jan-1970 00:00:01 GMT;";
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}
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function getCookie(name) {
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var nameEQ = name + "=";
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var ca = document.cookie.split(';');
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for(var i=0;i < ca.length;i++) {
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var c = ca[i];
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while (c.charAt(0)==' ') c = c.substring(1,c.length);
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if (c.indexOf(nameEQ) == 0) {
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return unescape(c.substring(nameEQ.length,c.length));
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}
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}
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return null;
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}
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var max_results = 75; // 50 is not enough to search for map in the base libraries
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var shown_range = null;
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var last_search = null;
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function quick_search()
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{
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perform_search(false);
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}
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function full_search()
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{
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perform_search(true);
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}
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function perform_search(full)
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{
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var text = document.getElementById("searchbox").value.toLowerCase();
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if (text == last_search && !full) return;
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last_search = text;
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var table = document.getElementById("indexlist");
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var status = document.getElementById("searchmsg");
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var children = table.firstChild.childNodes;
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// first figure out the first node with the prefix
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var first = bisect(-1);
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var last = (first == -1 ? -1 : bisect(1));
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if (first == -1)
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{
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table.className = "";
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status.innerHTML = "No results found, displaying all";
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}
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else if (first == 0 && last == children.length - 1)
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{
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table.className = "";
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status.innerHTML = "";
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}
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else if (last - first >= max_results && !full)
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{
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table.className = "";
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status.innerHTML = "More than " + max_results + ", press Search to display";
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}
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else
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{
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// decide what you need to clear/show
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if (shown_range)
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setclass(shown_range[0], shown_range[1], "indexrow");
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setclass(first, last, "indexshow");
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shown_range = [first, last];
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table.className = "indexsearch";
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status.innerHTML = "";
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}
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function setclass(first, last, status)
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{
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for (var i = first; i <= last; i++)
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{
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children[i].className = status;
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}
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}
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// do a binary search, treating 0 as ...
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// return either -1 (no 0's found) or location of most far match
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function bisect(dir)
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{
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var first = 0, finish = children.length - 1;
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var mid, success = false;
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while (finish - first > 3)
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{
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mid = Math.floor((finish + first) / 2);
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var i = checkitem(mid);
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if (i == 0) i = dir;
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if (i == -1)
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finish = mid;
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else
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first = mid;
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}
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var a = (dir == 1 ? first : finish);
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var b = (dir == 1 ? finish : first);
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for (var i = b; i != a - dir; i -= dir)
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{
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if (checkitem(i) == 0) return i;
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}
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return -1;
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}
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// from an index, decide what the result is
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// 0 = match, -1 is lower, 1 is higher
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function checkitem(i)
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{
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var s = getitem(i).toLowerCase().substr(0, text.length);
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if (s == text) return 0;
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else return (s > text ? -1 : 1);
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}
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// from an index, get its string
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// this abstracts over alternates
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function getitem(i)
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{
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for ( ; i >= 0; i--)
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{
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var s = children[i].firstChild.firstChild.data;
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if (s.indexOf(' ') == -1)
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return s;
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}
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return ""; // should never be reached
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}
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}
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function setSynopsis(filename) {
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if (parent.window.synopsis) {
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if (parent.window.synopsis.location.replace) {
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// In Firefox this avoids adding the change to the history.
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parent.window.synopsis.location.replace(filename);
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} else {
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parent.window.synopsis.location = filename;
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}
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}
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}
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function addMenuItem(html) {
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var menu = document.getElementById("page-menu");
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if (menu) {
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var btn = menu.firstChild.cloneNode(false);
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btn.innerHTML = html;
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menu.appendChild(btn);
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}
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}
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function adjustForFrames() {
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var bodyCls;
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if (parent.location.href == window.location.href) {
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// not in frames, so add Frames button
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addMenuItem("<a href='#' onclick='reframe();return true;'>Frames</a>");
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bodyCls = "no-frame";
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}
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else {
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bodyCls = "in-frame";
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}
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addClass(document.body, bodyCls);
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}
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function reframe() {
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setCookie("haddock-reframe", document.URL);
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window.location = "frames.html";
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}
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function postReframe() {
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var s = getCookie("haddock-reframe");
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if (s) {
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parent.window.main.location = s;
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clearCookie("haddock-reframe");
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}
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}
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function styles() {
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var i, a, es = document.getElementsByTagName("link"), rs = [];
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for (i = 0; a = es[i]; i++) {
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if(a.rel.indexOf("style") != -1 && a.title) {
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rs.push(a);
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}
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}
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return rs;
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}
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function addStyleMenu() {
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var as = styles();
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var i, a, btns = "";
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for(i=0; a = as[i]; i++) {
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btns += "<li><a href='#' onclick=\"setActiveStyleSheet('"
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+ a.title + "'); return false;\">"
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+ a.title + "</a></li>"
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}
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if (as.length > 1) {
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var h = "<div id='style-menu-holder'>"
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+ "<a href='#' onclick='styleMenu(); return false;'>Style ▾</a>"
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+ "<ul id='style-menu' class='hide'>" + btns + "</ul>"
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+ "</div>";
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addMenuItem(h);
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}
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}
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function setActiveStyleSheet(title) {
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var as = styles();
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var i, a, found;
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for(i=0; a = as[i]; i++) {
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a.disabled = true;
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// need to do this always, some browsers are edge triggered
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if(a.title == title) {
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found = a;
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}
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}
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if (found) {
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found.disabled = false;
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setCookie("haddock-style", title);
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}
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else {
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as[0].disabled = false;
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clearCookie("haddock-style");
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}
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styleMenu(false);
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}
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function resetStyle() {
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var s = getCookie("haddock-style");
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if (s) setActiveStyleSheet(s);
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}
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function styleMenu(show) {
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var m = document.getElementById('style-menu');
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if (m) toggleShow(m, show);
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}
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function pageLoad() {
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addStyleMenu();
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adjustForFrames();
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resetStyle();
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restoreCollapsed();
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}
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