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/* globals marked, unfetch, ES6Promise */
if (!window.Promise) {
window.Promise = ES6Promise;
}
if (!window.fetch) {
window.fetch = unfetch;
}
var $inputElem = document.querySelector('#input');
var $outputTypeElem = document.querySelector('#outputType');
var $previewElem = document.querySelector('#preview');
var $permalinkElem = document.querySelector('#permalink');
var $clearElem = document.querySelector('#clear');
var $htmlElem = document.querySelector('#html');
var $lexerElem = document.querySelector('#lexer');
var $panes = document.querySelectorAll('.pane');
var inputDirty = true;
var $activeElem = null;
var changeTimeout = null;
var search = searchToObject();
if ('text' in search) {
$inputElem.value = search.text;
} else {
fetch('./initial.md')
.then(function (res) { return res.text(); })
.then(function (text) {
if ($inputElem.value === '') {
$inputElem.value = text;
inputDirty = true;
clearTimeout(changeTimeout);
checkForChanges();
setScrollPercent(0);
}
});
}
if (search.outputType) {
$outputTypeElem.value = search.outputType;
}
fetch('./quickref.md')
.then(function (res) { return res.text(); })
.then(function (text) {
document.querySelector('#quickref').value = text;
});
function handleChange() {
for (var i = 0; i < $panes.length; i++) {
$panes[i].style.display = 'none';
}
$activeElem = document.querySelector('#' + $outputTypeElem.value);
$activeElem.style.display = 'block';
updateLink();
};
$outputTypeElem.addEventListener('change', handleChange, false);
handleChange();
function handleInput() {
inputDirty = true;
};
$inputElem.addEventListener('change', handleInput, false);
$inputElem.addEventListener('keyup', handleInput, false);
$inputElem.addEventListener('keypress', handleInput, false);
$inputElem.addEventListener('keydown', handleInput, false);
$clearElem.addEventListener('click', function () {
$inputElem.value = '';
handleInput();
}, false);
function searchToObject() {
// modified from https://stackoverflow.com/a/7090123/806777
var pairs = location.search.slice(1).split('&');
var obj = {};
for (var i = 0; i < pairs.length; i++) {
if (pairs[i] === '') {
continue;
}
var pair = pairs[i].split('=');
obj[decodeURIComponent(pair.shift())] = decodeURIComponent(pair.join('='));
}
return obj;
}
function jsonString(input) {
var output = (input + '')
.replace(/\n/g, '\\n')
.replace(/\r/g, '\\r')
.replace(/\t/g, '\\t')
.replace(/\f/g, '\\f')
.replace(/[\\"']/g, '\\$&')
.replace(/\u0000/g, '\\0');
return '"' + output + '"';
};
function getScrollSize() {
var e = $activeElem;
return e.scrollHeight - e.clientHeight;
};
function getScrollPercent() {
var size = getScrollSize();
if (size <= 0) {
return 1;
}
return $activeElem.scrollTop / size;
};
function setScrollPercent(percent) {
$activeElem.scrollTop = percent * getScrollSize();
};
function updateLink() {
var outputType = '';
if ($outputTypeElem.value !== 'preview') {
outputType = 'outputType=' + $outputTypeElem.value + '&';
}
$permalinkElem.href = '?' + outputType + 'text=' + encodeURIComponent($inputElem.value);
history.replaceState('', document.title, $permalinkElem.href);
}
var delayTime = 1;
function checkForChanges() {
if (inputDirty) {
inputDirty = false;
updateLink();
var startTime = new Date();
var scrollPercent = getScrollPercent();
var lexed = marked.lexer($inputElem.value);
var lexedList = [];
for (var i = 0; i < lexed.length; i++) {
var lexedLine = [];
for (var j in lexed[i]) {
lexedLine.push(j + ':' + jsonString(lexed[i][j]));
}
lexedList.push('{' + lexedLine.join(', ') + '}');
}
var parsed = marked.parser(lexed);
$previewElem.innerHTML = (parsed);
$htmlElem.value = (parsed);
$lexerElem.value = (lexedList.join('\n'));
setScrollPercent(scrollPercent);
var endTime = new Date();
delayTime = endTime - startTime;
if (delayTime < 50) {
delayTime = 50;
} else if (delayTime > 500) {
delayTime = 1000;
}
}
changeTimeout = window.setTimeout(checkForChanges, delayTime);
};
checkForChanges();
setScrollPercent(0);
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