blob: 0144848d5e5ba1c32fb92a6bd82e6a82518edc70 [file] [log] [blame]
// Copyright 2016 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Store child window object which will display slides with notes
var notesWindow = null;
var isParentWindow = window.parent == window;
// When parent window closes, clear storage and close child window
if (isParentWindow) {
window.onbeforeunload = function() {
localStorage.clear();
if (notesWindow) notesWindow.close();
}
};
function toggleNotesWindow() {
if (!isParentWindow) return;
if (notesWindow) {
notesWindow.close();
notesWindow = null;
return;
}
initNotes();
};
// Create an unique key for the local storage so we don't mix the
// destSlide of different presentations. For golang.org/issue/24688.
function destSlideKey() {
var key = '';
if (notesWindow) {
var slides = notesWindow.document.getElementById('presenter-slides');
key = slides.src.split('#')[0];
} else {
key = window.location.href.split('#')[0];
}
return 'destSlide:' + key;
}
function initNotes() {
notesWindow = window.open('', '', 'width=1000,height=700');
var w = notesWindow;
var slidesUrl = window.location.href;
// Hack to apply css. Requires existing html on notesWindow.
w.document.write("<div style='display:none;'></div>");
w.document.title = window.document.title;
var slides = w.document.createElement('iframe');
slides.id = 'presenter-slides';
slides.src = slidesUrl;
w.document.body.appendChild(slides);
var curSlide = parseInt(localStorage.getItem(destSlideKey()), 10);
var formattedNotes = '';
var section = sections[curSlide - 1];
// curSlide is 0 when initialized from the first page of slides.
// Check if section is valid before retrieving Notes.
if (section) {
formattedNotes = formatNotes(section.Notes);
} else if (curSlide == 0) {
formattedNotes = formatNotes(titleNotes);
}
// setTimeout needed for Firefox
setTimeout(function() {
slides.focus();
}, 100);
var notes = w.document.createElement('div');
notes.id = 'presenter-notes';
notes.innerHTML = formattedNotes;
w.document.body.appendChild(notes);
w.document.close();
function addPresenterNotesStyle() {
var el = w.document.createElement('link');
el.rel = 'stylesheet';
el.type = 'text/css';
el.href = PERMANENT_URL_PREFIX + 'notes.css';
w.document.body.appendChild(el);
w.document.querySelector('head').appendChild(el);
}
addPresenterNotesStyle();
// Add listener on notesWindow to update notes when triggered from
// parent window
w.addEventListener('storage', updateNotes, false);
};
function formatNotes(notes) {
var formattedNotes = '';
if (notes) {
for (var i = 0; i < notes.length; i++) {
formattedNotes = formattedNotes + '<p>' + notes[i] + '</p>';
}
}
return formattedNotes;
};
function updateNotes() {
// When triggered from parent window, notesWindow is null
// The storage event listener on notesWindow will update notes
if (!notesWindow) return;
var destSlide = parseInt(localStorage.getItem(destSlideKey()), 10);
var section = sections[destSlide - 1];
var el = notesWindow.document.getElementById('presenter-notes');
if (!el) return;
if (section && section.Notes) {
el.innerHTML = formatNotes(section.Notes);
} else if (destSlide == 0) {
el.innerHTML = formatNotes(titleNotes);
} else {
el.innerHTML = '';
}
};
/* Playground syncing */
// When presenter notes are enabled, playground click handlers are
// stored here to sync click events on the correct playground
var playgroundHandlers = {onRun: [], onKill: [], onClose: []};
function updatePlay(e) {
var i = localStorage.getItem('play-index');
switch (e.key) {
case 'play-index':
return;
case 'play-action':
// Sync 'run', 'kill', 'close' actions
var action = localStorage.getItem('play-action');
playgroundHandlers[action][i](e);
return;
case 'play-code':
// Sync code editing
var play = document.querySelectorAll('div.playground')[i];
play.innerHTML = localStorage.getItem('play-code');
return;
case 'output-style':
// Sync resizing of playground output
var out = document.querySelectorAll('.output')[i];
out.style = localStorage.getItem('output-style');
return;
}
};
// Reset 'run', 'kill', 'close' storage items when synced
// so that successive actions can be synced correctly
function updatePlayStorage(action, index, e) {
localStorage.setItem('play-index', index);
if (localStorage.getItem('play-action') === action) {
// We're the receiving window, and the message has been received
localStorage.removeItem('play-action');
} else {
// We're the triggering window, send the message
localStorage.setItem('play-action', action);
}
if (action === 'onRun') {
if (localStorage.getItem('play-shiftKey') === 'true') {
localStorage.removeItem('play-shiftKey');
} else if (e.shiftKey) {
localStorage.setItem('play-shiftKey', e.shiftKey);
}
}
};