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cs.js
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cs.js
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// Marty Stepp's Stanford CS course web site script
// Sets up various things on my course web site pages,
// such as zebra striping for some table rows,
// links to files, email addresses and campus buildings.
// wrap entire script in an anonymous function to avoid polluting global scope
// (JS module pattern)
(function() {
"use strict";
var DEPARTMENT_EMAIL_DOMAIN = "http://web.stanford.edu/class/cs193a/cs.stanford.edu";
var UNIVERSITY_EMAIL_DOMAIN = "http://web.stanford.edu/class/cs193a/stanford.edu";
var DEFAULT_EMAIL_DOMAIN = DEPARTMENT_EMAIL_DOMAIN;
var WEEK1_SUN;
var DATES = {};
var DAYS_OF_WEEK = ["Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"];
var MONTHS_OF_YEAR = ["January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"];
setupReferenceDates();
// max number of files that will be shown before initially collapsing
var MAX_FILES_LENGTH = 99;
// URL stub for campus map building links
// (this list is woefully incomplete; if you need to add a building, go ahead)
var BUILDING_IDS = {
// "braun": "01-320",
"annenberg": "03-010",
"annenberg auditorium": "03-010",
"art4": "03-010",
"bishop": "08-350",
"bishop auditorium": "08-350",
"braun": "07-210",
"braun auditorium": "07-210",
"braun corner": "01-320",
"cemex": "08-050C",
"cemex auditorium": "08-050C",
"cubberley": "03-300",
"cubberley auditorium": "03-300",
"dinkelspiel auditorium": "02-200",
"dinkelspiel": "02-200",
"educ": "03-300",
"education": "03-300",
"encina": "06-010",
"encina hall center": "06-010",
"encinaw": "06-020",
"encina hall west": "06-020",
"encina west": "06-020",
"gates": "07-450",
"geology": "01-320",
"gilbert": "07-420",
"herrin hall": "07-410",
"herrin": "07-410",
"hewlett": "04-510",
"history": "01-200",
"jacks": "01-460",
"jordan hall (psychology)": "01-420",
"jordan hall": "01-420",
"jordan": "01-420",
"lane": "01-200",
"lane history corner": "01-200",
"lathrop": "08-350",
"lathrop library": "08-350",
"margaret jacks hall": "01-460",
"margaret jacks": "01-460",
"memorial auditorium": "08-300",
"memorial": "08-300",
"mudd": "07-210",
"mudd chemistry": "07-210",
"sloan mathematics": "01-380",
"sloan": "01-380",
"thornton": "04-720",
"tressider": "02-300",
"wallenberg": "01-160",
"blume earthquake center (civil eng)": "02-540",
"blume earthquake center": "02-540",
"blume": "02-540",
"civil eng": "02-540",
"mcclatchy": "01-120",
"mcclatchy hall": "01-120",
"building 300": "01-300",
"building 300, main quad": "01-300",
// "160": "01-160"
"50": "01-050",
"540": "02-540",
};
var MAPS_URL = "http://campus-map.stanford.edu/index.cfm?ID=";
// Turns spans with class of "building" into links to a campus map to that building.
function buildingMapLinks() {
var cells = document.querySelectorAll(".building");
for (var i = 0; i < cells.length; i++) {
var addr = cells[i].innerHTML;
if (addr == "TBD" || addr == "TBA") {
continue;
}
var tokens = addr.split(/[ \-]+/);
var building = tokens[0];
var roomNumber = "";
if (tokens.length >= 2) {
roomNumber = " " + tokens[1];
}
var buildingLC = building.toLowerCase();
var buildingID = addr;
if (BUILDING_IDS[buildingLC]) {
buildingID = BUILDING_IDS[buildingLC];
} else {
// possible weird building link like "160-321";
// check for just the first part ("160") in BUILDING_IDS map; if it's there, use that;
// if not, assume most common "01-" prefix, e.g. "01-160"
if (BUILDING_IDS[building]) {
buildingID = BUILDING_IDS[building];
} else {
buildingID = "01-" + building;
}
}
cells[i].update("<a target=\"_blank\" href=\"" + MAPS_URL + buildingID + "\">" + cells[i].innerHTML + "</a>");
}
}
// Displays a warning message on the page if this is not the current quarter's web site.
function checkPageOutOfDate() {
// TODO: update this code for Stanford
if (location.href.match(/cs106.\.stanford\.edu/)) {
return;
}
// try to figure out what quarter this web site is for
var quarter = location.href.replace(/.*\/cse([0-9a-zA-Z]+)\/([0-9a-zA-Z]+)\/.*/, "$2");
if (!quarter || quarter.toLowerCase() == "currentqtr" || quarter.length != 4) {
return;
}
var quarterYear = 2000 + parseInt(quarter.substring(0, 2), 10); // "11wi" -> 11
var quarterQtr = quarter.substring(2); // "11wi" -> "wi"
var now = new Date();
var currentYear = now.getYear();
if (currentYear < 1000) {
// non-IE<=8 returns year since 1900; IE<=8 returns actual year
currentYear += 1900;
}
var currentQtr = ""; // e.g. "11au"
var currentQtrQtr = ""; // e.g. "au"
var obsolete = false;
// try to figure out what quarter it is currently (roughly)
var QUARTERS = ["wi", "sp", "su", "au"];
var QUARTER_START = {
"wi": "Jan 1",
"sp": "Mar 20",
"su": "Jun 24",
"au": "Sep 20"
};
var QUARTER_END = {
"wi": "Mar 19",
"sp": "Jun 23",
"su": "Sep 19",
"au": "Dec 31"
};
var QUARTER_FULL_NAME = {
"wi": "Winter",
"sp": "Spring",
"su": "Summer",
"au": "Autumn"
};
// "Dec 6 2011 8:15 AM"
for (var i = 0; i < QUARTERS.length; i++) {
var qtrName = QUARTERS[i];
var dateStart = new Date(Date.parse(QUARTER_START[qtrName] + " " + currentYear + " 12:00 AM"));
var dateEnd = new Date(Date.parse(QUARTER_END[qtrName] + " " + currentYear + " 11:59 PM"));
if (dateStart <= now && now <= dateEnd) {
// found the current quarter! now see if this web page is from that quarter.
currentQtr = currentYear % 100 + qtrName;
currentQtrQtr = qtrName;
break;
}
}
if (quarterYear < currentYear) {
obsolete = true; // this web site comes from a past year
} else if (quarter && currentQtr) {
var quarterIndex = QUARTERS.indexOf(quarterQtr);
var currentQtrIndex = QUARTERS.indexOf(currentQtrQtr);
obsolete = quarter != currentQtr &&
(quarterIndex >= 0 && currentQtrIndex >= 0 && quarterIndex < currentQtrIndex); // this web site may come from a past quarter in the same year
}
var quarterFullName = QUARTER_FULL_NAME[quarterQtr] + " " + quarterYear;
var currentQuarterFullName = QUARTER_FULL_NAME[currentQtrQtr] + " " + currentYear;
if (obsolete) {
var div = document.createElement("div");
// try to figure out what course this web site is for
var course = location.href.replace(/.*\/cse([0-9a-zA-Z]+)\/.*/, "$1") || (location.href.match(/143/) ? "143" : "142");
var websiteLink = "http://cs" + course + ".stanford.edu/";
div.className = "excitingnews";
div.update("NOTE: This old web site is <strong>out of date</strong>. " +
"This is the course web site from a past quarter, <strong>" + quarter + "</strong> (" + quarterFullName + "), " +
"but the current quarter is <strong>" + currentQtr + "</strong> (" + currentQuarterFullName + "). " +
"If you are a current student taking the course, this is not your class web site, " +
"and you should visit the <a href=\"" + websiteLink + "\">current class web site</a> instead.");
var container = $$("div.centerpane")[0] || $("container") || document.body;
container.insertBefore(div, container.firstChild);
}
}
// Inserts information about course staff as table rows.
// sectionLeaderList = [
// {name: "Alex Hsu", email: "kzm", sectiontime: "Wed 7:00 PM", sectionroom: "420-371"}, ... ]
function insertStaffTableRows() {
if (typeof(sectionLeaderList) == "undefined") {
return;
}
var templateRow = document.querySelector("#sltemplaterow, .sltemplaterow");
if (!templateRow) {
return;
}
var slTable = $("sltable");
if (!slTable) {
return;
}
var slTableBody = slTable.querySelector("tbody");
for (var i = 0; i < sectionLeaderList.length; i++) {
var slRow = templateRow.cloneNode(true);
slRow.style.display = "";
slTableBody.appendChild(slRow);
var sl = sectionLeaderList[i];
for (var prop in sl) {
if (sl.hasOwnProperty(prop)) {
var slRowElement = slRow.querySelector(".sl" + prop);
if (slRowElement) {
slRowElement.innerHTML = sl[prop];
}
}
}
var slImage = slRow.querySelector(".slimage");
if (slImage) {
var slNameLC = sl["name"].toLowerCase().replace(/ /g, "-");
slImage.src = slImage.src.replace(/SLNAME/, slNameLC);
}
}
}
// Returns true if the given image is indicating that its area is expanded.
function isExpanded(img) {
return img.src.match(/minus/);
}
// Sets the given image to be a plus or minus icon.
function swapPlusMinus(img) {
if (isExpanded(img)) {
img.src = img.src.replace(/minus/, "plus");
} else {
img.src = img.src.replace(/plus/, "minus");
}
}
// Toggles an element being expanded or collapsed.
function toggleCollapsed(collapse) {
collapse.select("ul").each(Element.toggle);
var img = collapse.select("img.plusicon")[0];
swapPlusMinus(img);
}
// Handles click on a link around a plusicon image.
function collapseableClick(event, element) {
if (event) {
event.stop();
}
if (!element) {
element = this;
}
var collapse = element.up(".collapseable");
if (!collapse) { return; }
toggleCollapsed(collapse);
}
// Turns spans with class of "ema" into links to email that person.
function emailAddressLinks() {
var cells = $$(".ema");
for (var i = 0; i < cells.length; i++) {
var addr = cells[i].textContent ? cells[i].textContent : cells[i].innerText;
var linkText = addr;
var domain = DEFAULT_EMAIL_DOMAIN;
if (cells[i].hasClassName("deptema")) {
domain = DEPARTMENT_EMAIL_DOMAIN;
} else if (cells[i].hasClassName("universityema")) {
domain = UNIVERSITY_EMAIL_DOMAIN;
}
if (!cells[i].hasClassName("hideema")) {
linkText += "@" + domain;
}
cells[i].update("<a href=\"mailto:" + addr + "@" + domain + "\"><img src=\"images/icon_email.gif\"/*tpa=http://web.stanford.edu/class/cs193a/images/icon_email.gif*/ class=\"icon\" alt=\"icon\" width=\"16\" height=\"16\" /> " + linkText + "</a>");
}
}
// Expands all lists of files on lecture calendar page.
function expandAllClick(event) {
if (event) {
event.stop();
}
var img = this.select("img.plusicon")[0];
if (!img) { return; }
var expand = !!img.src.match(/plus/);
swapPlusMinus(img);
$$(".collapseable").each(function(collapse) {
// .select("ul").each(Element.toggle);
var img = collapse.select("img.plusicon")[0];
if (!!isExpanded(img) !== expand) {
toggleCollapsed(collapse);
}
});
}
/** Returns all query parameters on the page as a [key => value] hash. */
function getQueryParams() {
var hash = {};
if (location.search && location.search.length >= 1) {
var url = location.search.substring(1);
var chunks = url.split(/&/);
for (var i = 0; i < chunks.length; i++) {
var keyValue = chunks[i].split("=");
if (keyValue[0]) {
var thisValue = true;
if (typeof(keyValue[1]) !== "undefined") {
thisValue = encodeURIComponent(keyValue[1]);
thisValue = thisValue.replace(/[+]/g, " "); // unescape URL spaces
}
hash[keyValue[0]] = thisValue;
}
}
}
return hash;
}
// try to highlight current date table cell on lecture calendar page
function highlightCurrentDate() {
$$(".folder.subheading").each(function(element) {
var text = typeof(element.textContent) !== "undefined" ? element.textContent : element.innerText;
text = text.trim().replace(/\n.*/gi, "");
if (text.match(/[0-9]{1,2}-[0-9]{1,2}/)) {
// then this is a date
var today = new Date();
var tokens = text.split(/-/);
var month = parseInt(tokens[0], 10);
var day = parseInt(tokens[1], 10);
if (month == today.getMonth() + 1 && day == today.getDate()) {
var td = element.up("td");
if (td) {
td.addClassName("today");
td.id = "today";
} else {
element.addClassName("today");
element.id = "today";
}
if (location.hash == "#today") {
// this line might seem useless, but re-setting the #hash makes
// the browser jump down to the element with that newly-set id
location.hash = "#today";
}
} else if (month > today.getMonth() + 1 ||
(month == today.getMonth() + 1 && day > today.getDate())) {
// let's also set a style on days in the future, just for fun
var td = element.up("td");
if (td) {
td.addClassName("future");
} else {
element.addClassName("future");
}
}
}
});
}
// Turns links with class of "honorcode" into links that pop up a reminder to obey the course honor code
function honorCodeLinks() {
var FADESPEED = 0.5;
if ($("honorcodeaccept")) {
$("honorcodeaccept").onclick = function() {
if ($("honorcodeaccept").popup) {
// Event.simulate($("honorcodeaccept").link, "click");
location.href = $("honorcodeaccept").href;
} else {
location.href = $("honorcodeaccept").href;
}
$("honorcodemessage").fade({duration: FADESPEED});
};
}
if ($("honorcodecancel")) {
$("honorcodecancel").observe("click", function() {
$("honorcodemessage").fade({duration: FADESPEED});
});
}
$$("a.honorcodelink").each(function(link) {
// turn off popup in new tab because of interstitial popup window
if (link.hasClassName("popup")) {
link.target = "";
}
link.observe("click", function(event) {
event = event || window.event;
event.stop();
$("honorcodeaccept").link = link;
$("honorcodeaccept").href = link.href;
$("honorcodeaccept").popup = link.hasClassName("popup");
$("honorcodemessage").appear({duration: FADESPEED});
return false;
});
});
}
function insertDates() {
// inject each date's month/day into "date" spans sequentially
// Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
var daysInMonth = [-1, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31];
var month = 0;
var day = 0;
var year = 2012; // hard-code 2012 because course web site will not change year in the future
if (year % 400 == 0 || (year % 4 == 0 && year % 100 != 0)) {
daysInMonth[2]++; // leap years
}
var today = new Date();
var tomorrow = new Date();
tomorrow.setDate(today.getDate() + 1);
var yesterday = new Date();
yesterday.setDate(today.getDate() - 1);
$$(".date").each(function(element) {
if (element.innerHTML) {
var tokens = element.innerHTML.split(/\//);
month = parseInt(tokens[0], 10);
day = parseInt(tokens[1], 10);
} else if (month > 0 && day > 0) {
day++;
if (day > daysInMonth[month]) {
day = 1;
month = (month % 12) + 1;
}
element.update(month + "/" + day);
}
var td = element.up("td");
if (td) {
var thisDate = new Date(year, month - 1, day);
if (thisDate > yesterday && thisDate <= today) {
td.addClassName("today");
}
}
});
}
// Sets +/- icons to expand/collapse various groups of files on the Lectures page.
function plusMinusLinks() {
$$(".plusicon").each(function(el) {
var a = el.up("a");
a.href = "#";
if (!a || a.id == "expandall") { return; }
a.observe("click", collapseableClick);
var collapse = el.up(".collapseable");
if (collapse) {
collapseableClick(null, el); // initially collapsed
}
});
if ($("expandall")) {
$("expandall").observe("click", expandAllClick);
}
}
// Shows any "delayed" sections such as labs or sections to pop up on certain dates.
// Useful for setting up an initially hidden div that will suddenly show up later.
// Example:
// <div class="assignmentarea delayed" style="display: none">
// <span class="showdate" style="display: none">Dec 6 2011 8:15 AM</span>
// ...
// </div>
function processDelayedContent() {
var queryParams = getQueryParams();
var changed = false;
$$(".delayed").each(function(element) {
var showDateText = "";
replaceRelativeDate(element, /* skipInnerHTML */ true);
// one option: another class attribute with the date/time to show it
var classes = element.className.split(/[ ]+/);
for (var i = 0; i < classes.length; i++) {
if (classes[i].match(/delayed_/) || classes[i].match(/showdate_/)) {
// "delayed_May_24_2011_11__00_PM"
showDateText = classes[i].replace(/delayed_/, "").replace(/showdate_/, "");
showDateText = showDateText.replace(/__/g, ":");
showDateText = showDateText.replace(/_/g, " ");
break;
}
}
// other option: a span with the date/time to show it
if (!showDateText) {
var showDateSpan = element.select(".showdate")[0];
if (showDateSpan) {
showDateText = showDateSpan.innerHTML;
if (!queryParams["ta"] || queryParams["clean"]) {
showDateSpan.parentNode.removeChild(showDateSpan);
}
}
}
// can also have a "hide date" where the element will go away
var hideDateText = "";
var hideDateSpan = element.select(".hidedate")[0];
if (hideDateSpan) {
hideDateText = hideDateSpan.innerHTML;
hideDateSpan.parentNode.removeChild(hideDateSpan);
} else {
for (var i = 0; i < classes.length; i++) {
if (classes[i].match(/hidedate_/)) {
// "delayed_May_24_2011_11__00_PM"
hideDateText = classes[i].replace(/hidedate_/, "");
hideDateText = hideDateText.replace(/__/g, ":");
hideDateText = hideDateText.replace(/_/g, " ");
break;
}
}
}
var now = new Date();
if (showDateText) {
var showDate = new Date(Date.parse(showDateText));
if (showDate) {
if (queryParams["ta"] || now >= showDate) {
if (!$(element).visible()) {
changed = true;
}
$(element).show();
$(element).style.visibility = "";
if (queryParams["ta"] || queryParams["debug"]) {
console.log("showing (because after " + showDate + "): " + element + " id=" + element.id + " class=" + element.className + ", display=" + element.style.display);
}
} else {
if (queryParams["ta"] || queryParams["debug"]) {
console.log("NOT showing (because not after " + showDate + "): " + element + " id=" + element.id + " class=" + element.className + ", display=" + element.style.display);
}
}
}
if (showDateSpan && queryParams["ta"] && now < showDate) {
showDateSpan.addClassName("showdatevisible");
showDateSpan.title = "This content on the page will become visible to the students at the given date/time: " + showDate;
if (!$(element).visible()) {
changed = true;
}
$(showDateSpan).show();
$(element).style.visibility = "";
}
}
if (hideDateText) {
var hideDate = new Date(Date.parse(hideDateText));
if (hideDate && now >= hideDate) {
if ($(element).visible()) {
changed = true;
}
$(element).remove();
}
}
});
if (changed) {
// run again after browser has laid out other previously hidden content,
// which is needed if there are any nested "delayed" elements (for some reason)
setTimeout(processDelayedContent, 50);
}
}
// Makes "section cells" link to building info about that section.
function sectionCellLinks() {
$$(".sectioncell").each(function(el) {
// "http://www.cs.stanford.edu/education/courses/cse154/10su/staff.shtml" -> "154"
var course = location.href.replace(/.*\/cse([0-9]{3,4})[a-z]?\/.*/, "$1");
var quarter = "AUT2011";
// "http://www.cs.stanford.edu/education/courses/cse154/10su/staff.shtml" -> "10 su"
var qtrStr = location.href.replace(/.*\/([0-9]{2})([a-zA-Z]{2})\/.*/, "$1 $2");
var today = new Date();
var year = today.getYear();
if (year < 1000) {
// non-IE<=8 returns year since 1900; IE<=8 returns actual year
year += 1900;
}
var qtrMap = {
"wi" : "WIN",
"sp" : "SPR",
"su" : "SUM",
"au" : "AUT"
};
if (qtrStr.length > 0) {
var tokens = qtrStr.split(/ /);
if (tokens.length >= 2) {
year = parseInt(tokens[0], 10) + 2000;
var qtr = qtrMap[tokens[1]];
quarter = qtr + year;
}
}
el.update("<a target=\"_blank\" href=\"http://www.stanford.edu/students/timeschd/" + quarter + "/cse.html#cse" + course + "\">" + el.innerHTML + "</a>");
});
}
function getTextContent(element) {
try {
if (element.value !== undefined) {
return element.value;
} else if (element.textContent !== undefined) {
return element.textContent;
} else if (element.innerText !== undefined) {
return element.innerText;
} else if (element.firstChild !== undefined && element.firstChild.nodeValue !== undefined) {
return element.firstChild.nodeValue;
}
} catch (e) {}
return null;
}
function setTextContent(element, text) {
try {
if (element.textContent !== undefined) {
element.textContent = text;
} else if (element.value !== undefined) {
element.value = text;
} else if (element.innerText !== undefined) {
element.innerText = text;
} else if (element.firstChild !== undefined) {
element.firstChild.nodeValue = text;
}
} catch (e) {}
return element;
}
// <span class="showdate" style="display: none">Week1 Fri 8:00 AM</span>
// Due <span class="insertdate" rel="Week2 Wed"></span>, 11:30pm. <br />
function setupReferenceDates() {
if (typeof(WEEK1_SUN) == "undefined" || WEEK1_SUN === null) {
if ($("WEEK1_SUN")) {
WEEK1_SUN = new Date(Date.parse($("WEEK1_SUN").getAttribute("content") || $("WEEK1_SUN").getAttribute("rel") || $("WEEK1_SUN").innerHTML));
} else {
var meta = $$("meta[name='WEEK1_SUN']")[0];
WEEK1_SUN = meta.getAttribute("content");
}
}
if (!WEEK1_SUN) {
console.log("No WEEK1_SUN variable found. Unable to compute relative dates.");
return;
}
// set up reference dates of the week for each week of the quarter
var date = new Date(WEEK1_SUN);
for (var i = 1; i <= 20; i++) {
for (var day = 0; day < DAYS_OF_WEEK.length; day++) {
var date2 = new Date(date);
DATES["Week" + i + " " + DAYS_OF_WEEK[day].substring(0, 3)] = date2;
date.setDate(date.getDate() + 1); // handles month wrapping
}
}
}
// Replaces any element inner text that contains a relative date such as "Week2 Fri"
// with the actual absolute date such as "Fri Mar 17".
function replaceRelativeDate(element, skipInnerHTML) {
// first look for delayed_DATE class class
// <div class="delayed delayed_Week1_Tue_8__00_AM" style="display: none;">
// becomes
// <div class="delayed delayed_Apr_17_2013_8__00_AM" style="display: none;">
var classNames = element.classList || element.className.split(/[ ]+/);
for (var i = 0; i < classNames.length; i++) {
var classStr = classNames[i]; // "delayed_Week1_Tue_8__00_AM"
// match = ["delayed_Week1_Tue_8__00_AM", "1", "Tue"]
var datePattern = /delayed_week[_]*(\d+)[_]*(sun|mon|tue|wed|thu|fri|sat)/i;
var match = classStr.match(datePattern);
if (match && match.length >= 3) {
var dateString = "Week" + match[1] + " " + match[2][0].toUpperCase() + match[2].substring(1); // "Week1 Tue"
if (DATES[dateString]) {
var date = DATES[dateString];
var year = date.getYear();
if (year < 1000) {
// non-IE<=8 returns year since 1900; IE<=8 returns actual year
year += 1900;
}
var newDateString = "delayed_" +
MONTHS_OF_YEAR[date.getMonth()].substring(0, 3) +
"_" + date.getDate() +
"_" + year;
var newClassStr = classStr.replace(datePattern, newDateString);
element.removeClassName(classStr);
element.addClassName(newClassStr);
return;
}
}
}
// fallback: stores show-date as inner HTML
if (skipInnerHTML !== true) {
var text = element.getAttribute("rel") || getTextContent(element);
var datePattern = /week[ ]*(\d+)[ ]*(sun|mon|tue|wed|thu|fri|sat)/i;
var match = text.match(datePattern);
if (match && match.length >= 3) {
// regex match returns array of numbered parts matching () groups
// match = ["Week2 Fri", "2", "Fri"]
var dateString = "Week" + match[1] + " " + match[2][0].toUpperCase() + match[2].substring(1);
if (DATES[dateString]) {
var date = DATES[dateString];
var newDateString;
if (element.hasClassName("insertdatelong")) {
newDateString = DAYS_OF_WEEK[date.getDay()] + ", " + MONTHS_OF_YEAR[date.getMonth()] + " " + date.getDate();
} else if (element.hasClassName("insertdateshort")) {
newDateString = DAYS_OF_WEEK[date.getDay()].substring(0, 3) +
" " + MONTHS_OF_YEAR[date.getMonth()].substring(0, 3) +
" " + date.getDate();
} else {
var year = date.getYear();
if (year < 1000) {
// non-IE<=8 returns year since 1900; IE<=8 returns actual year
year += 1900;
}
newDateString = DAYS_OF_WEEK[date.getDay()].substring(0, 3) +
" " + MONTHS_OF_YEAR[date.getMonth()].substring(0, 3) +
" " + date.getDate() +
" " + year;
}
text = text.replace(datePattern, newDateString);
setTextContent(element, text);
}
}
}
}
// for debugging; shows all delayed elements on the page.
function showDelayed() {
$$(".delayed").each(function(element) {
$(element).show();
$(element).style.visibility = "";
});
}
// Colors every other row of tables that have the class 'color_alternating_rows'
// or the class 'zebrastripe'.
function zebraStripes() {
var rows = $$("table.color_alternating_rows tr");
for (var i = 0; i < rows.length; i += 2) {
// color every other row gray
rows[i].addClassName("evenrow");
}
rows = $$("table.zebrastripe tr");
for (var i = 0; i < rows.length; i += 2) {
// color every other row gray
rows[i].addClassName("evenrow");
}
}
// This is "main", the main function of code that runs when the page loads.
document.observe("dom:loaded", function() {
// handle zebra-striping on HTML tables as indicated
// zebraStripes();
// make links with the class 'popup' show in a new window
$$("a.popup").each(function(element) {
element.target = "_blank";
});
// staff page: insert SL/TA info
if (location.pathname.match(/\/staff/)) {
insertStaffTableRows();
}
// place links around email addresses
emailAddressLinks();
// place links to maps to campus buildings
buildingMapLinks();
// make some links show a reminder about the course honor code
honorCodeLinks();
// auto-insert dates on "date" spans
$$(".insertdate, .insertdateshort, .dateshort, .showdate, .hidedate").each(replaceRelativeDate);
insertDates();
// show any "delayed" links such as labs or sections to pop up on certain dates
processDelayedContent();
// put up a warning if this is not the current quarter's web site
checkPageOutOfDate();
if (location.href.match(/lectures.[s]?html/)) {
plusMinusLinks(); // set +/- icons to expand/collapse various groups of files
highlightCurrentDate();
if ($("maximizelink")) {
$("maximizelink").href = "#";
$("maximizelink").observe("click", function() {
this.siblings().each(Element.toggle);
return false;
});
}
}
});
})();
// UTILITY FUNCTIONS
/** Deletes whitespace from the front of the given string. */
String.prototype.ltrim = function() {
for (var k = 0; k < this.length && this.charAt(k) <= " "; k++) {
}
return this.substring(k, this.length);
};
/** Inserts spaces at the front of the given string until it reaches the given length,
* then returns the padded string.
*/
String.prototype.padL = function(length, nbsp) {
var str = this;
while (str.length < length) {
str = (nbsp ? " " : " ") + str;
}
return str;
};
/** Inserts spaces at the front of the given string until it reaches the given length,
* then returns the padded string.
*/
String.prototype.padR = function(length, nbsp) {
var str = this;
while (this.length < length) {
str = str + (nbsp ? " " : " ");
}
return str;
};
/** Deletes whitespace from the end of the given string. */
String.prototype.rtrim = function() {
for ( var j = this.length - 1; j >= 0 && this.charAt(j) <= " "; j--) {
}
return this.substring(0, j + 1);
};
/** Converts escape sequences into visible characters. */
String.prototype.toPrintableChar = function() {
if (this == "\n") {
return "\\n";
} else if (this == "\r") {
return "\\r";
} else if (this == "\t") {
return "\\t";
} else if (this == " " && navigator.userAgent.match(/Internet Explorer/)) {
return " "; // IE sux
} else {
return this;
}
};
/** Deletes whitespace from the front and end of the given string. */
String.prototype.trim = function() {
return this.ltrim().rtrim();
};
/**
* code stolen from
* http://github.com/kangax/protolicious/blob/5b56fdafcd7d7662c9d648534225039b2e78e371/event.simulate.js
*
* Event.simulate(@element, eventName[, options]) -> Element
*
* - @element: element to fire event on
* - eventName: name of event to fire (only MouseEvents and HTMLEvents interfaces are supported)
* - options: optional object to fine-tune event properties - pointerX, pointerY, ctrlKey, etc.
*
* $('foo').simulate('click'); // => fires "click" event on an element with id=foo
*
**/
(function(){
var eventMatchers = {
'HTMLEvents': /^(?:load|unload|abort|error|select|change|submit|reset|focus|blur|resize|scroll)$/,
'MouseEvents': /^(?:click|mouse(?:down|up|over|move|out))$/
}
var defaultOptions = {
pointerX: 0,
pointerY: 0,
button: 0,
ctrlKey: false,
altKey: false,
shiftKey: false,
metaKey: false,
bubbles: true,
cancelable: true
}
Event.simulate = function(element, eventName) {
var options = Object.extend(defaultOptions, arguments[2] || { });
var oEvent, eventType = null;
element = $(element);
for (var name in eventMatchers) {
if (eventMatchers[name].test(eventName)) {
eventType = name;
break;
}
}
if (!eventType) {
throw new SyntaxError('Only HTMLEvents and MouseEvents interfaces are supported');
}
if (document.createEvent) {
oEvent = document.createEvent(eventType);
if (eventType == 'HTMLEvents') {
oEvent.initEvent(eventName, options.bubbles, options.cancelable);
}
else {
oEvent.initMouseEvent(eventName, options.bubbles, options.cancelable, document.defaultView,
options.button, options.pointerX, options.pointerY, options.pointerX, options.pointerY,
options.ctrlKey, options.altKey, options.shiftKey, options.metaKey, options.button, element);
}
element.dispatchEvent(oEvent);
}
else {
options.clientX = options.pointerX;
options.clientY = options.pointerY;
oEvent = Object.extend(document.createEventObject(), options);
element.fireEvent('on' + eventName, oEvent);
}
return element;
};
Element.disableLink = function(element) {
if (!element || element.disabled) {
return element;
}
element.disabled = true;
//element.oldBG = element.getStyle("background-color");
element.oldFG = "black";
if (typeof(element.getStyle) !== "undefined") {
// BUGFIX: element foreground colors were not being restored after disable/re-enable
element.oldFG = element.getStyle("color");
}
//element.style.backgroundColor = "#ccc";
element.style.color = "#888";
// if element is a link (a), must turn off its href for now
if (element.tagName && element.tagName.toLowerCase() == "a") {
// element.oldHref = element.href;
// element.href = "";
}
return element;
};
Element.enableLink = function(element) {
if (!element || !element.disabled) {
return element;
}
element.disabled = false;
//element.style.backgroundColor = element.oldBG;
element.style.color = element.oldFG;
// if element is a link (a), must turn back on its href
if (element.tagName && element.tagName.toLowerCase() == "a") {
// element.href = element.oldHref;
// element.oldHref = undefined;
}