mirror of
https://github.com/writefreely/writefreely
synced 2024-11-10 19:34:19 +00:00
297 lines
7.3 KiB
JavaScript
297 lines
7.3 KiB
JavaScript
/**
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* H.js
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*
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* Lightweight, extremely bare-bones library for manipulating the DOM and
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* saving some typing.
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*/
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var Element = function(domElement) {
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this.el = domElement;
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};
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/**
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* Creates a toggle button that adds / removes the given class name from the
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* given element.
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*
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* @param {Element} $el - The element to modify.
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* @param {string} onClass - The class to add to the given element.
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* @param {function} onFunc - Additional actions when toggling on.
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* @param {function} offFunc - Additional actions when toggling off.
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*/
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Element.prototype.createToggle = function($el, onClass, onFunc, offFunc) {
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this.on('click', function(e) {
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if ($el.el.className === '') {
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$el.el.className = onClass;
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onFunc(new Element(this), e);
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} else {
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$el.el.className = '';
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offFunc(new Element(this), e);
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}
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e.preventDefault();
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}, false);
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};
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Element.prototype.on = function(event, func) {
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events = event.split(' ');
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var el = this.el;
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if (el == null) {
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console.error("Error: element for event is null");
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return;
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}
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var addEvent = function(e) {
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if (el.addEventListener) {
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el.addEventListener(e, func, false);
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} else if (el.attachEvent) {
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el.attachEvent(e, func);
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}
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};
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if (events.length === 1) {
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addEvent(event);
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} else {
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for(var i=0; i<events.length; i++) {
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addEvent(events[i]);
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}
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}
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};
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Element.prototype.setClass = function(className) {
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if (this.el == null) {
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console.error("Error: element to set class on is null");
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return;
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}
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this.el.className = className;
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};
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Element.prototype.removeClass = function(className) {
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if (this.el == null) {
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console.error("Error: element to remove class on is null");
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return;
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}
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var regex = new RegExp(' ?' + className, 'g');
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this.el.className = this.el.className.replace(regex, '');
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};
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Element.prototype.text = function(text, className) {
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if (this.el == null) {
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console.error("Error: element for setting text is null");
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return;
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}
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if (this.el.textContent !== text) {
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this.el.textContent = text;
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if (typeof className !== 'undefined') {
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this.el.className = this.el.className + ' ' + className;
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}
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}
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};
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Element.prototype.insertAfter = function(newNode) {
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if (this.el == null) {
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console.error("Error: element for insertAfter is null");
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return;
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}
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this.el.parentNode.insertBefore(newNode, this.el.nextSibling);
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};
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Element.prototype.remove = function() {
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if (this.el == null) {
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console.error("Didn't remove element");
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return;
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}
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this.el.parentNode.removeChild(this.el);
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};
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Element.prototype.hide = function() {
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if (this.el == null) {
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console.error("Didn't hide element");
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return;
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}
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this.el.className += ' effect fade-out';
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};
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Element.prototype.show = function() {
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if (this.el == null) {
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console.error("Didn't show element");
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return;
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}
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this.el.className += ' effect';
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};
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var H = {
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getQEl: function(elementQuery) {
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return new Element(document.querySelector(elementQuery));
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},
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getEl: function(elementId) {
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return new Element(document.getElementById(elementId));
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},
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save: function($el, key) {
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localStorage.setItem(key, $el.el.value);
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},
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saveClassic: function($titleEl, $el, key) {
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var out = "";
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var title = $titleEl.el.value;
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if (title !== "") {
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out = "# "+title+"\n\n";
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}
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out += $el.el.value;
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localStorage.setItem(key, out);
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},
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load: function($el, key, onlyLoadPopulated, postUpdated) {
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var val = localStorage.getItem(key);
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if (onlyLoadPopulated && val == null) {
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// Do nothing
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return true;
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}
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$el.el.value = val;
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if (postUpdated != null) {
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var lastLocalPublishStr = localStorage.getItem(key+'-published');
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if (lastLocalPublishStr != null && lastLocalPublishStr != '') {
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try {
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var lastLocalPublish = new Date(lastLocalPublishStr);
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if (postUpdated > lastLocalPublish) {
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return false;
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}
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} catch (e) {
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console.error("unable to parse draft updated time");
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}
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}
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}
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return true;
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},
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loadClassic: function($titleEl, $el, key, onlyLoadPopulated) {
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var val = localStorage.getItem(key);
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if (onlyLoadPopulated && val == null) {
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// Do nothing
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return;
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}
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if (val.indexOf("# ") === 0) {
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var eol = val.indexOf("\n");
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title = val.substring("# ".length, eol);
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val = val.substring(eol+"\n\n".length);
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$titleEl.el.value = title;
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}
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$el.el.value = val;
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},
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set: function(key, value) {
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localStorage.setItem(key, value);
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},
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get: function(key, defaultValue) {
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var val = localStorage.getItem(key);
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if (val == null) {
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val = defaultValue;
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}
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return val;
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},
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remove: function(key) {
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localStorage.removeItem(key);
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},
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exists: function(key) {
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return localStorage.getItem(key) !== null;
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},
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createPost: function(id, editToken, content, created) {
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var summaryLen = 200;
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var titleLen = 80;
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var getPostMeta = function(content) {
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var eol = content.indexOf("\n");
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if (content.indexOf("# ") === 0) {
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// Title is in the format:
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//
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// # Some title
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var summary = content.substring(eol).trim();
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if (summary.length > summaryLen) {
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summary = summary.substring(0, summaryLen) + "...";
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}
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return {
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title: content.substring("# ".length, eol),
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summary: summary,
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};
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}
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var blankLine = content.indexOf("\n\n");
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if (blankLine !== -1 && blankLine <= eol && blankLine <= titleLen) {
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// Title is in the format:
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//
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// Some title
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//
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// The body starts after that blank line above it.
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var summary = content.substring(blankLine).trim();
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if (summary.length > summaryLen) {
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summary = summary.substring(0, summaryLen) + "...";
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}
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return {
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title: content.substring(0, blankLine),
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summary: summary,
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};
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}
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// TODO: move this to the beginning
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var title = content.trim();
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var summary = "";
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if (title.length > titleLen) {
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// Content can't fit in the title, so figure out the summary
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summary = title;
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title = "";
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if (summary.length > summaryLen) {
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summary = summary.substring(0, summaryLen) + "...";
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}
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} else if (eol > 0) {
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summary = title.substring(eol+1);
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title = title.substring(0, eol);
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}
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return {
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title: title,
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summary: summary
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};
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};
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var post = getPostMeta(content);
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post.id = id;
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post.token = editToken;
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post.created = created ? new Date(created) : new Date();
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post.client = "Pad";
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return post;
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},
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getTitleStrict: function(content) {
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var eol = content.indexOf("\n");
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var title = "";
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var newContent = content;
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if (content.indexOf("# ") === 0) {
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// Title is in the format:
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// # Some title
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if (eol !== -1) {
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// First line should start with # and end with \n
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newContent = content.substring(eol).leftTrim();
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title = content.substring("# ".length, eol);
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}
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}
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return {
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title: title,
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content: newContent
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};
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},
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};
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var He = {
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create: function(name) {
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return document.createElement(name);
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},
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get: function(id) {
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return document.getElementById(id);
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},
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$: function(selector) {
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var els = document.querySelectorAll(selector);
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return els;
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},
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postJSON: function(url, params, callback) {
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var http = new XMLHttpRequest();
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http.open("POST", url, true);
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// Send the proper header information along with the request
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http.setRequestHeader("Content-type", "application/json");
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http.onreadystatechange = function() {
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if (http.readyState == 4) {
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callback(http.status, JSON.parse(http.responseText));
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}
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}
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http.send(JSON.stringify(params));
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},
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};
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String.prototype.leftTrim = function() {
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return this.replace(/^\s+/,"");
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};
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