// @license magnet:?xt=urn:btih:d3d9a9a6595521f9666a5e94cc830dab83b65699&dn=expat.txt Expat // @license magnet:?xt=urn:btih:cf05388f2679ee054f2beb29a391d25f4e673ac3&dn=gpl-2.0.txt GPL /** * Copyright (c) 2014 Leonardo Cardoso (http://leocardz.com) * Dual licensed under the MIT (http://www.opensource.org/licenses/mit-license.php) * and GPL (http://www.opensource.org/licenses/gpl-license.php) licenses. * * Restructured by Rabzuarus (https://friendica.kommune4.de/profile/rabuzarus) * to use it in the decentralized social network Friendica (https://friendi.ca). * * Version: 1.4.0 */ (function ($) { $.fn.linkPreview = function (options) { var opts = jQuery.extend({}, $.fn.linkPreview.defaults, options); var id = $(this).attr('id'); var previewTpl = '\
\ {1}\ \ \ \
'; var attachmentTpl = '\
\
\ \
\
\
\ \
\
\
\ \ \ \ \
\
\

\
\
\ \
\
\
'; var text; var binurl; var block = false; var blockTitle = false; var blockDescription = false; var cache = {}; var images = ""; var isExtern = false; var photoNumber = 0; var firstPosted = false; var isActive = false; var isCrawling = false; var defaultTitle = opts.defaultTitle; var defaultDescription = opts.defaultDescription; /** * Initialize the plugin * * @returns {void} */ var init = function() { $('#' + id).bind({ paste: function () { setTimeout(function () { crawlText(); }, 100); }, keyup: function (e) { // on enter, space, ctrl if ((e.which === 13 || e.which === 32 || e.which === 17)) { crawlText(); } } }); // Check if we have already attachment bbcode in the textarea // and add it to the attachment preview. var content = $('#' + id).val(); addBBCodeToPreview(content); }; /** * Reset some values. * * @returns {void} */ var resetPreview = function() { $('#hasAttachment_' + id).val(0); photoNumber = 0; images = ""; }; /** * Crawl a text string if it contains an url and try * to attach it. * * If no text is passed to crawlText() we take * the previous word before the cursor of the textarea. * * @param {string} text (optional) * @returns {void} */ var crawlText = function (text) { block = false; images = ''; isExtern = false; // If no text is passed to crawlText() we // take the previous word before the cursor. if (typeof text === 'undefined') { text = getPrevWord(id); } else { isExtern = true; } // Don't process the textarea input if we have already // an attachment preview. if (!isExtern && isActive) { return; } if (trim(text) !== "" && block === false && urlRegex.test(text)) { binurl = bin2hex(text); block = true; isCrawling = true; $('#profile-rotator').show(); if (binurl in cache) { isCrawling = false; processContentData(cache[binurl]); } else { getContentData(binurl, processContentData); } } }; /** * Process the attachment data according to * its content type (image, audio, video, attachment) * * @param {object} result * @returns {void} */ var processContentData = function(result) { if (result.contentType === 'image') { insertImage(result.data); } if (result.contentType === 'audio') { insertAudio(result.data); } if (result.contentType === 'video') { insertVideo(result.data); } if (result.contentType === 'attachment') { insertAttachment(result.data); } $('#profile-rotator').hide(); }; /** * Fetch the content of link which should be attached. * * @param {string} binurl Link which should be attached as hexadecimal string. * @param {type} callback * @returns {void} */ var getContentData = function(binurl, callback) { $.get('parseurl?binurl='+ binurl + '&format=json', function (answer) { obj = sanitizeInputData(answer); // Put the data into a cache cache[binurl] = obj; callback(obj); isCrawling = false; }); }; /* * Add a [img] bbtag with the image url to the jot editor. * * @param {type} data * @returns {void} */ var insertImage = function(data) { if (!isExtern) { return; } var bbcode = '\n[img]' + data.url + '[/img]\n'; addeditortext(bbcode); }; /* * Add a [audio] bbtag with the audio url to the jot editor. * * @param {type} data * @returns {void} */ var insertAudio = function(data) { if (!isExtern) { return; } var bbcode = '\n[audio]' + data.url + '[/audio]\n'; addeditortext(bbcode); }; /* * Add a [video] bbtag with the video url to the jot editor. * * @param {type} data * @returns {void} */ var insertVideo = function(data) { if (!isExtern) { return; } var bbcode = '\n[video]' + data.url + '[/video]\n'; addeditortext(bbcode); }; /** * Process all attachment data and show up a html * attachment preview. * * @param {obj} data Attachment data. * @returns {void} */ var insertAttachment = function(data) { // If we have already a preview, leaver here. // Note: if we finish the Preview of other media content type, // we can move this condition to the beginning of crawlText(); if (isActive) { $('#profile-rotator').hide(); return; } if (data.type !== 'link' && data.type !== 'video' && data.type !== 'photo' || data.url === data.title) { $('#profile-rotator').hide(); return; } $('#photoNumber_' + id).val(0); resetPreview(); processAttachmentTpl(data, 'type-' + data.type); addTitleDescription(data); addHostToAttachment(data.url); addImagesToAttachment(data.images); processEventListener(); $('#profile-rotator').hide(); }; /** * Construct the attachment html from the attachment template and * add it to the DOM. * * @param {object} data Attachment data. * @returns {void} */ var processAttachmentTpl = function(data) { // Load and add the template if it isn't already loaded. if ($('#preview_' + id).length === 0) { var tpl = previewTpl.format( 'type-' + data.type, attachmentTpl, 1, bin2hex(data.url), data.type ); $('#' + id).after(tpl); } isActive = true; }; /** * Add the attachment title and the description * to the attachment preview. * * @param {object} data Attachment data. * @returns {void} */ var addTitleDescription = function(data) { var description = data.text; if (description === '') { description = defaultDescription; } $('#previewTitle_' + id).html("\ " + escapeHTML(data.title) + "\ " ); $('#previewDescription_' + id).html("\ " + escapeHTML(description) + "\n\ " ); }; /** * Add the host to the attachment preview. * * @param {string} url The url of the link attachment. * @returns {void} */ var addHostToAttachment = function(url) { if (url) { var regexpr = "(https?://)([^:^/]*)(:\\d*)?(.*)?"; var regResult = url.match(regexpr); var urlHost = regResult[1] + regResult[2]; $('#previewUrl_' + id).html("" + urlHost + ""); } }; /** * Add preview images to the attachment. * * @param {array} images * * @returns {void} */ var addImagesToAttachment = function(images) { var imageClass = 'attachment-preview'; if (Array.isArray(images)) { $('#previewImages_' + id).show(); $('#attachmentImageSrc_' + id).val(bin2hex(images[photoNumber].src)); $('#attachmentImageWidth_' + id).val(images[photoNumber].width); $('#attachmentImageHeight_' + id).val(images[photoNumber].height); } else { $('#previewImages_' + id).hide(); } images.length = parseInt(images.length); var appendImage = ""; for (i = 0; i < images.length; i++) { // For small preview images we use a smaller attachment format. ///@todo here we need to add a check for !DI::config()->get('system', 'always_show_preview'). if (images[i].width >= 500 && images[i].width >= images[i].height) { imageClass = 'attachment-image'; } if (i === 0) { appendImage += ""; } else { appendImage += ""; } } $('#previewImage_' + id).html(appendImage + ""); // More than just one image. if (images.length > 1) { // Enable the button to change the preview pictures. $('#previewChangeImg_' + id).show(); if (firstPosted === false) { firstPosted = true; $('#previewChangeImg_' + id).unbind('click').click(function (e) { e.stopPropagation(); if (images.length > 1) { $('#imagePreview_' + id + '_' + photoNumber).css({ 'display': 'none' }); photoNumber += 1; // If have reached the last image, begin with the first image. if (photoNumber === images.length) { photoNumber = 0; } $('#imagePreview_' + id + '_' + photoNumber).css({ 'display': 'block' }); $('#photoNumber_' + id).val(photoNumber); $('#attachmentImageSrc_' + id).val(bin2hex(images[photoNumber].src)); $('#attachmentImageWidth_' + id).val(images[photoNumber].width); $('#attachmentImageHeight_' + id).val(images[photoNumber].height); } }); } } }; /** * Add event listener to control the attachment preview. * * @returns {void} */ var processEventListener = function() { $('#previewSpanTitle_' + id).unbind('click').click(function (e) { e.stopPropagation(); if (blockTitle === false) { blockTitle = true; $('#previewSpanTitle_' + id).hide(); $('#previewInputTitle_' + id).show(); $('#previewInputTitle_' + id).val($('#previewInputTitle_' + id).val()); $('#previewInputTitle_' + id).focus().select(); } }); $('#previewInputTitle_' + id).blur(function () { blockTitle = false; $('#previewSpanTitle_' + id).html($('#previewInputTitle_' + id).val()); $('#previewSpanTitle_' + id).show(); $('#previewInputTitle_' + id).hide(); }); $('#previewInputTitle_' + id).keypress(function (e) { if (e.which === 13) { blockTitle = false; $('#previewSpanTitle_' + id).html($('#previewInputTitle_' + id).val()); $('#previewSpanTitle_' + id).show(); $('#previewInputTitle_' + id).hide(); } }); $('#previewSpanDescription_' + id).unbind('click').click(function (e) { e.stopPropagation(); if (blockDescription === false) { blockDescription = true; $('#previewSpanDescription_' + id).hide(); $('#previewInputDescription_' + id).show(); $('#previewInputDescription_' + id).val($('#previewInputDescription_' + id).val()); $('#previewInputDescription_' + id).focus().select(); } }); $('#previewInputDescription_' + id).blur(function () { blockDescription = false; $('#previewSpanDescription_' + id).html($('#previewInputDescription_' + id).val()); $('#previewSpanDescription_' + id).show(); $('#previewInputDescription_' + id).hide(); }); $('#previewInputDescription_' + id).keypress(function (e) { if (e.which === 13) { blockDescription = false; $('#previewSpanDescription_' + id).html($('#previewInputDescription_' + id).val()); $('#previewSpanDescription_' + id).show(); $('#previewInputDescription_' + id).hide(); } }); $('#previewSpanTitle_' + id).mouseover(function () { $('#previewSpanTitle_' + id).css({ "background-color": "#ff9" }); }); $('#previewSpanTitle_' + id).mouseout(function () { $('#previewSpanTitle_' + id).css({ "background-color": "transparent" }); }); $('#previewSpanDescription_' + id).mouseover(function () { $('#previewSpanDescription_' + id).css({ "background-color": "#ff9" }); }); $('#previewSpanDescription_' + id).mouseout(function () { $('#previewSpanDescription_' + id).css({ "background-color": "transparent" }); }); $('#closePreview_' + id).unbind('click').click(function (e) { e.stopPropagation(); block = false; images = ''; isActive = false; firstPosted = false; $('#preview_' + id).fadeOut("fast", function () { $('#preview_' + id).remove(); $('#profile-rotator').hide(); $('#' + id).focus(); }); }); }; /** * Convert attachment bbcode into an array. * * @param {string} content Text content with the attachment bbcode. * @returns {object || null} */ var getAttachmentData = function(content) { var data = {}; var match = content.match(/([\s\S]*)\[attachment([\s\S]*?)\]([\s\S]*?)\[\/attachment\]([\s\S]*)/im); if (match === null || match.length < 5) { return null; } var attributes = match[2]; data.text = trim(match[1]); var type = ''; var matches = attributes.match(/type='([\s\S]*?)'/im); if (matches !== null && typeof matches[1] !== 'undefined') { type = matches[1].toLowerCase(); } matches = attributes.match(/type="([\s\S]*?)"/im); if (matches !== null && typeof matches[1] !== 'undefined') { type = matches[1].toLowerCase(); } if (type === '') { return null; } if ( type !== 'link' && type !== 'audio' && type !== 'photo' && type !== 'video') { return null; } if (type !== '') { data.type = type; } var url = ''; matches = attributes.match(/url='([\s\S]*?)'/im); if (matches !== null && typeof matches[1] !== 'undefined') { url = matches[1]; } matches = attributes.match(/url="([\s\S]*?)"/im); if (matches !== null && typeof matches[1] !== 'undefined') { url = matches[1]; } if(url !== '') { data.url = escapeHTML(url); } var title = ''; matches = attributes.match(/title='([\s\S]*?)'/im); if (matches !== null && typeof matches[1] !== 'undefined') { title = trim(matches[1]); } matches = attributes.match(/title="([\s\S]*?)"/im); if (matches !== null && typeof matches[1] !== 'undefined') { title = trim(matches[1]); } if (title !== '') { data.title = escapeHTML(title); } var image = ''; matches = attributes.match(/image='([\s\S]*?)'/im); if (matches !== null && typeof matches[1] !== 'undefined') { image = trim(matches[1]); } matches = attributes.match(/image="([\s\S]*?)"/im); if (matches !== null && typeof matches[1] !== 'undefined') { image = trim(matches[1]); } if (image !== '') { data.image = escapeHTML(image); } var preview = ''; matches = attributes.match(/preview='([\s\S]*?)'/im); if (matches !== null && typeof matches[1] !== 'undefined') { preview = trim(matches[1]); } matches = attributes.match(/preview="([\s\S]*?)"/im); if (matches !== null && typeof matches[1] !== 'undefined') { preview = trim(matches[1]); } if (preview !== '') { data.preview = escapeHTML(preview); } data.text = trim(match[3]); data.after = trim(match[4]); return data; }; /** * Process txt content and if it contains attachment bbcode * add it to the attachment preview . * * @param {string} content * @returns {void} */ var addBBCodeToPreview =function(content) { var attachmentData = getAttachmentData(content); if (attachmentData) { reAddAttachment(attachmentData); // Remove the attachment bbcode from the textarea. var content = content.replace(/\[attachment[\s\S]*\[\/attachment]/im, ''); $('#' + id).val(content); $('#' + id).focus(); } }; /** * Add an Attachment with data from an old bbcode * generated attachment. * * @param {object} json The attachment data. * @returns {void} */ var reAddAttachment = function(json) { if (isActive) { $('#profile-rotator').hide(); return; } if (json.type !== 'link' && json.type !== 'video' && json.type !== 'photo' || json.url === json.title) { $('#profile-rotator').hide(); return; } var obj = {data: json}; obj = sanitizeInputData(obj); var data = obj.data; resetPreview(); processAttachmentTpl(data); addTitleDescription(data); addHostToAttachment(data.url); // Since we don't have an array of image data, // we need to add the preview images in a different way // than in function addImagesToAttachment(). var imageClass = 'attachment-preview'; var image = ''; if (data.image !== '') { imageClass = 'attachment-image'; image = data.image; } else { image = data.preview; } if (image !== '') { var appendImage = "" $('#previewImage_' + id).html(appendImage); $('#attachmentImageSrc_' + id).val(bin2hex(image)); // We need to add the image width and height when it is // loaded. $('' ,{ load : function(){ $('#attachmentImageWidth_' + id).val(this.width); $('#attachmentImageHeight_' + id).val(this.height); }, src : image }); } processEventListener(); $('#profile-rotator').hide(); }; /** * Add missing default properties to the input data object. * * @param {object} obj Input data. * @returns {object} */ var sanitizeInputData = function(obj) { if (typeof obj.contentType === 'undefined' || obj.contentType === null) { obj.contentType = ""; } if (typeof obj.data.url === 'undefined' || obj.data.url === null) { obj.data.url = ""; } if (typeof obj.data.title === 'undefined' || obj.data.title === null || obj.data.title === "") { obj.data.title = defaultTitle; } if (typeof obj.data.text === 'undefined' || obj.data.text === null || obj.data.text === "") { obj.data.text = ""; } if (typeof obj.data.images === 'undefined' || obj.data.images === null) { obj.data.images = ""; } if (typeof obj.data.image === 'undefined' || obj.data.image === null) { obj.data.image = ""; } if (typeof obj.data.preview === 'undefined' || obj.data.preview === null) { obj.data.preview = ""; } return obj; }; /** * Destroy the plugin. * * @returns {void} */ var destroy = function() { $('#' + id).unbind(); $('#preview_' + id).remove(); binurl; block = false; blockTitle = false; blockDescription = false; cache = {}; images = ""; isExtern = false; photoNumber = 0; firstPosted = false; isActive = false; isCrawling = false; id = ""; }; var trim = function(str) { return str.replace(/^\s+|\s+$/g, ""); }; var escapeHTML = function(unsafe_str) { return unsafe_str .replace(/&/g, '&') .replace(//g, '>') .replace(/\"/g, '"') .replace(/\[/g, '[') .replace(/\]/g, ']') .replace(/\'/g, '''); // ''' is not valid HTML 4 }; // Initialize LinkPreview init(); return { // make crawlText() accessable from the outside. crawlText: function(text) { crawlText(text); }, addBBCodeToPreview: function(content) { addBBCodeToPreview(content); }, destroy: function() { destroy(); } }; }; $.fn.linkPreview.defaults = { defaultDescription: "Enter a description", defaultTitle: "Enter a title" }; /** * Get in a textarea the previous word before the cursor. * * @param {object} text Textarea element. * @param {integer} caretPos Cursor position. * * @returns {string} Previous word. */ function returnWord(text, caretPos) { var index = text.indexOf(caretPos); var preText = text.substring(0, caretPos); // If the last character is a space or enter remove it // We need this in friendica for the url preview. var lastChar = preText.slice(-1) if ( lastChar === " " || lastChar === "\n" || lastChar === "\r" ) { preText = preText.substring(0, preText.length -1); } // Replace new line with space. preText = preText.replace(/\n/g, " "); if (preText.indexOf(" ") > 0) { var words = preText.split(" "); return words[words.length - 1]; //return last word } else { return preText; } } /** * Get in a textarea the previous word before the cursor. * * @param {string} id The ID of a textarea element. * @returns {sting|null} Previous word or null if no word is available. */ function getPrevWord(id) { var text = document.getElementById(id); var caretPos = getCaretPosition(text); var word = returnWord(text.value, caretPos); if (word != null) { return word } } /** * Get the cursor position in an text element. * * @param {object} ctrl Textarea element. * @returns {integer} Position of the cursor. */ function getCaretPosition(ctrl) { var CaretPos = 0; // IE Support if (document.selection) { ctrl.focus(); var Sel = document.selection.createRange(); Sel.moveStart('character', -ctrl.value.length); CaretPos = Sel.text.length; } // Firefox support else if (ctrl.selectionStart || ctrl.selectionStart == '0') { CaretPos = ctrl.selectionStart; } return (CaretPos); } })(jQuery); // @license-end