fix some links and add FOSDEM 2017 talk to index
[slides.git] / linuxwochen2015 / slides.js
CommitLineData
2ba8be31
RK
1/******************************
2 * JavaScript for talk slides *
3 * by Robert Kaiser *
4 * <kairo@kairo.at> *
5 * (for FOSDEM 2011) *
6 ******************************/
7
8var slides = {};
9var articleNodes;
10var currentSlide;
11var currentIdx;
12var defaultIdx = 1; // set to slide index to show by default
13var firstIdx = 2; // set no value if to use first available
14var lastIdx; // set no value if to use first available
15
16var pageTitle, headerText, subHeaderText;
17var navPrev, navNext, navPrevNolink, navNextNolink;
18
19// Slide timer - color variation of headerText
20var slideSeconds = 2 * 60;
21
22// Called when the document has been loaded.
23function docLoaded() {
24 pageTitle = document.getElementsByTagName("title")[0];
25 headerText = document.getElementById("header-text");
26 subHeaderText = document.getElementById("subheader-text");
27 navPrev = document.getElementById("nav-prev");
28 navNext = document.getElementById("nav-next");
29 navPrevNolink = document.getElementById("nav-prev-nolink");
30 navNextNolink = document.getElementById("nav-next-nolink");
31 articleNodes = document.getElementsByTagName("article");
32
33 if (!firstIdx)
34 firstIdx = 0;
35 if (!lastIdx)
36 lastIdx = articleNodes.length - 1;
37
38 // Get a list of all slides (articles).
39 subHeaderText.textContent = articleNodes.length + " slides...";
40 for (var i = 0; i < articleNodes.length; ++i) {
41 subHeaderText.textContent = "Indexing slide " + i + " / " + articleNodes.length;
42 if (!articleNodes[i].id)
43 articleNodes[i].id = "slide_" + i;
44
45 slides[articleNodes[i].id] =
46 {"idx": i,
47 "name": articleNodes[i].id,
48 "title": articleNodes[i].title ? articleNodes[i].title : articleNodes[i].id,
49 "obj": articleNodes[i]};
50
51 if (location.hash.length &&
52 (location.hash == "#" + articleNodes[i].id || location.hash == "#" + i)) {
53 articleNodes[i].setAttribute("aria-selected", "true");
54 currentSlide = slides[articleNodes[i].id];
55 currentIdx = i;
56 }
57 }
58
59 if (!currentSlide) {
60 currentIdx = defaultIdx;
61 currentSlide = slides[articleNodes[currentIdx].id];
62 currentSlide.obj.setAttribute("aria-selected", "true");
63 location.hash = "#" + currentSlide.name;
64 }
65 updateDisplay();
66}
67
68// Called when the hash part of the location changes.
69function locationHashChanged() {
70 if (location.hash.length > 1) {
71 var hashtag = location.hash.substring(1);
72 // If not a number, treat as ID
73 if (isNaN(hashtag) && slides[hashtag]) {
74 currentSlide.obj.removeAttribute("aria-selected");
75 currentSlide = slides[hashtag];
76 currentIdx = currentSlide.idx;
77 currentSlide.obj.setAttribute("aria-selected", "true");
78 updateDisplay();
79 }
80 else if (articleNodes[hashtag]) {
81 currentSlide.obj.removeAttribute("aria-selected");
82 currentIdx = hashtag;
83 currentSlide = slides[articleNodes[currentIdx].id];
84 currentSlide.obj.setAttribute("aria-selected", "true");
85 updateDisplay();
86 }
87 }
88}
89window.onhashchange = locationHashChanged;
90
91// Update the display after we updated what slide is shown.
92function updateDisplay() {
93 if (currentIdx >= firstIdx && currentIdx <= lastIdx &&
94 currentSlide.name != "toc")
95 subHeaderText.textContent = (currentIdx - firstIdx + 1) + "/" +
96 (lastIdx - firstIdx + 1) + " - " +
97 currentSlide.title;
98 else
99 subHeaderText.textContent = currentSlide.title;
100 pageTitle.textContent = headerText.textContent + ": " + currentSlide.title;
101 if (currentIdx > firstIdx && currentSlide.name != "toc") {
102 navPrev.hidden = false;
103 navPrev.href = "#" + articleNodes[currentIdx - 1].id;
104 navPrevNolink.hidden = true;
105 }
106 else {
107 navPrev.hidden = true;
108 navPrevNolink.hidden = false;
109 }
110 if (currentIdx < lastIdx && currentSlide.name != "toc") {
111 navNext.hidden = false;
112 navNext.href = "#" + articleNodes[currentIdx + 1].id;
113 navNextNolink.hidden = true;
114 }
115 else {
116 navNext.hidden = true;
117 navNextNolink.hidden = false;
118 }
119 headerText.className = "";
120 slideStart = new Date();
121 if (currentSlide.name == "toc")
122 createTOC();
123 else
124 setTimeout("timerFired()", timerMSec);
125}
126
127// Create TOC list.
128function createTOC() {
129 var list = document.getElementById("toc-list");
130 if (!list.getElementsByTagName("li").length) {
131 for (var slide in slides) {
132 if (slide != "toc") {
133 var item = document.createElement("li");
134 var link = document.createElement("a");
135 var slideHeaders = slides[slide].obj.getElementsByTagName("h1");
136 if (slideHeaders.length)
137 link.textContent = slideHeaders[0].textContent;
138 else
139 link.textContent = slides[slide].title;
140 link.href = "#" + slides[slide].name;
141 item.appendChild(link);
142 list.appendChild(item);
143 }
144 }
145 }
146}
147
148// Do timed color variation on slides.
149function timerFired() {
150 var slideCurrent = new Date();
151 var secondsDiff = Math.round((slideCurrent.getTime() - slideStart.getTime()) / 1000);
152 if (secondsDiff >= slideSeconds) {
153 headerText.className = "overtime";
154 }
155 else if (secondsDiff >= Math.round(2 * slideSeconds / 3)) {
156 headerText.className = "ontime";
157 setTimeout("timerFired()", timerMSec);
158 }
159 else if (secondsDiff >= Math.round(slideSeconds / 3)) {
160 headerText.className = "neartime";
161 setTimeout("timerFired()", timerMSec);
162 }
163 else {
164 // We should never come here, but if we do, go into a 100ms loop until we get over the upcoming step.
165 setTimeout("timerFired()", 100);
166 }
167}
168var slideStart = new Date();
169var timerMSec = 1000 * (slideSeconds / 3);
170setTimeout("timerFired()", timerMSec);
171
172// Keyboard/click nav functionality, mostly inherited from FOSDEM 2007.
173(function() {
174 function go(where) {
175 where = where || "next";
176 var navElem = document.getElementById("nav-" + where);
177 if (!navElem.hidden)
178 window.location.href = navElem.href;
179 }
180
181 function handleClick(e) {
182 e = e || event;
183 var target = (window.event) ? e.srcElement : e.target;
184 if (e.which == 1 && target.nodeName != "A" && target.nodeName != "VIDEO")
185 go("next");
186 }
187
188 function handleKeyPress(e) {
189 e = e || event;
190 switch (e.keyCode) {
191 case e.DOM_VK_LEFT:
192 go("prev"); break;
193 case e.DOM_VK_RIGHT:
194 go("next"); break;
195 }
196 }
197
198 window.onclick = handleClick;
199 window.onkeypress = handleKeyPress;
200})();