507 lines
16 KiB
JavaScript
507 lines
16 KiB
JavaScript
/**
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* Copyright (c) 2014 Leonardo Cardoso (http://leocardz.com)
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* Dual licensed under the MIT (http://www.opensource.org/licenses/mit-license.php)
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* and GPL (http://www.opensource.org/licenses/gpl-license.php) licenses.
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*
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* restructured from rabzuarus (https://friendica.kommune4.de/profile/rabuzarus)
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* for the decental social network Friendica.
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*
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* Version: 1.4.0
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*/
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(function ($) {
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$.fn.linkPreview = function (options) {
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var opts = jQuery.extend({}, $.fn.linkPreview.defaults, options);
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var selector = $(this).selector;
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selector = selector.substr(1);
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var previewTpl = '\
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<div id="preview_' + selector + '" class="preview {0}">\
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{1}\
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<input type="hidden" name="has_attachment" id="hasAttachment_' + selector + '" value="{2}" />\
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<input type="hidden" name="attachment_url" id="attachmentUrl_' + selector + '" value="{3}" />\
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<input type="hidden" name="attachment_type" id="attachmentType_' + selector + '" value="{4}" />\
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</div>';
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var attachmentTpl = '\
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<hr class="previewseparator">\
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<div id="closePreview_' + selector + '" title="Remove" class="closePreview" >\
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<button type="button" class="previewActionBtn">×</button>\
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</div>\
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<div id="previewImages_' + selector + '" class="previewImages">\
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<div id="previewImgBtn_' + selector + '" class="previewImgBtn">\
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<button type="button" id="previewChangeImg_' + selector + '" class="buttonChangeDeactive previewActionBtn" style="display: none">\
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<i class="fa fa-exchange" aria-hidden="true"></i>\
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</button>\
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</div>\
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<div id="previewImage_' + selector + '" class="previewImage">\
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</div>\
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<input type="hidden" id="photoNumber_' + selector + '" class="photoNumber" value="0" />\
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<input type="hidden" name="attachment_img_src" id="attachmentImageSrc_' + selector + '" value="" />\
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<input type="hidden" name="attachment_img_width" id="attachmentImageWidth_' + selector + '" value="0" />\
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<input type="hidden" name="attachment_img_height" id="attachmentImageHeight_' + selector + '" value="0" />\
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</div>\
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<div id="previewContent_' + selector + '" class="previewContent">\
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<h4 id="previewTitle_' + selector + '" class="previewTitle"></h4>\
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<blockquote id="previewDescription_' + selector + '" class="previewDescription"></blockquote>\
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<div id="hiddenDescription_' + selector + '" class="hiddenDescription"></div>\
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<sup id="previewUrl_' + selector + '" class="previewUrl"></sup>\
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</div>\
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<div class="clear"></div>\
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<hr class="previewseparator">';
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var text;
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var urlRegex = /(https?\:\/\/|\s)[a-z0-9-]+(\.[a-z0-9-]+)*(\.[a-z]{2,4})(\/+[a-z0-9_.\:\;-]*)*(\?[\&\%\|\+a-z0-9_=,\.\:\;-]*)?([\&\%\|\+&a-z0-9_=,\:\;\.-]*)([\!\#\/\&\%\|\+a-z0-9_=,\:\;\.-]*)}*/i;
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var binurl;
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var block = false;
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var blockTitle = false;
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var blockDescription = false;
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var cache = {};
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var images = "";
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var isExtern = false;
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var photoNumber = 0;
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var firstPosted = false;
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var isActive = false;
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var isCrawling = false;
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var defaultTitle = opts.defaultTitle;
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var defaultDescription = opts.defaultDescription;
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var init = function() {
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$('#' + selector).bind({
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paste: function () {
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setTimeout(function () {
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crawlText();
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}, 100);
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},
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keyup: function (e) {
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// on enter, space, ctrl
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if ((e.which === 13 || e.which === 32 || e.which === 17)) {
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crawlText();
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}
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}
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});
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};
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var resetPreview = function() {
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$('#hasAttachment_' + selector).val(0);
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photoNumber = 0;
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images = "";
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}
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var crawlText = function (text) {
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block = false;
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images = '';
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isExtern = false;
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if (typeof text === 'undefined') {
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text = getPrevWord(selector);
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} else {
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isExtern = true;
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}
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// Don't procces the textarea input if we have already
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// an attachment preview.
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if (!isExtern && isActive) {
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return;
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}
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if (trim(text) !== "") {
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if (block === false && urlRegex.test(text)) {
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binurl = bin2hex(text);
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block = true;
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isCrawling = true;
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$('#profile-rotator').show();
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if (binurl in cache) {
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isCrawling = false;
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processContentData(cache[binurl]);
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} else {
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getContentData(binurl, processContentData);
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}
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}
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}
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};
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var processContentData = function(result) {
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if (result.contentType === 'image') {
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insertImage(result.data);
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}
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if (result.contentType === 'attachment') {
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insertAttachment(result.data);
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}
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$('#profile-rotator').hide();
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}
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var getContentData = function(binurl, callback) {
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$.get('parse_url?binurl='+ binurl + '&dataType=json', function (answer) {
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if (typeof answer.contentType === 'undefined'
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|| answer.contentType === null)
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{
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answer.contentType = "";
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}
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if (typeof answer.data.url === 'undefined'
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|| answer.data.url === null)
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{
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answer.data.url = "";
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}
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if (typeof answer.data.title === 'undefined'
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|| answer.data.title === null
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|| answer.data.title === "")
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{
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answer.data.title = defaultTitle;
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}
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if (typeof answer.data.text === 'undefined'
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|| answer.data.text === null
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|| answer.data.text === "")
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{
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answer.data.text = "";
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}
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if (typeof answer.data.images === 'undefined'
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|| answer.data.images === null)
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{
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answer.data.images = "";
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}
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// Put the data into a cache
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cache[binurl] = answer;
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callback(answer);
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isCrawling = false;
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});
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}
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var insertImage = function(json) {
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if (!isExtern) {
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return
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}
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var bbcode = '\n[img]' + json.url + '[/img]\n';
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addeditortext(bbcode);
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};
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var insertAudio = function(json) {
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if (!isExtern) {
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return
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}
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var bbcode = '\n[audio]' + json.url + '[/audio]\n';
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addeditortext(bbcode);
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};
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var insertVideo = function(json) {
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if (!isExtern) {
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return
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}
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var bbcode = '\n[video]' + json.url + '[/video]\n';
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addeditortext(bbcode);
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};
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var insertAttachment = function(json) {
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// If we have already a preview, leaver here.
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// Note: if we finish the Preview of other media content type,
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// we can move this condition to the beggining of crawlText();
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if (isActive) {
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$('#profile-rotator').hide();
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return;
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}
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if (json.type != 'link' && json.type != 'video' && json.type != 'photo' || json.url == json.title) {
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$('#profile-rotator').hide();
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return;
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}
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$('#photoNumber_' + selector).val(0);
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resetPreview();
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var typeClass = 'type-' + json.type;
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var imageClass = 'attachment-preview';
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var urlHost = "";
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var description = json.text;
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// Load and add the template if it isn't allready loaded.
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if ($('#preview_' + selector).length == 0) {
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var tpl = previewTpl.format(
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typeClass,
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attachmentTpl,
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1,
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bin2hex(json.url),
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json.type
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);
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$('#' + selector).after(tpl);
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}
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isActive = true;
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if (description === '') {
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description = defaultDescription;
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}
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$('#previewTitle_' + selector).html("\
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<span id='previewSpanTitle_" + selector + "' class='previewSpanTitle' >" + escapeHTML(json.title) + "</span>\
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<input type='text' name='attachment_title' value='" + escapeHTML(json.title) + "' id='previewInputTitle_" + selector + "' class='previewInputTitle inputPreview' style='display: none;'/>"
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);
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$('#previewDescription_' + selector).html("\
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<span id='previewSpanDescription_" + selector + "' class='previewSpanDescription' >" + escapeHTML(description) + "</span>\n\
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<textarea id='previewInputDescription_" + selector + "' name='attachment_text' class='previewInputDescription' style='display: none;' class='inputPreview' >" + escapeHTML(json.text) + "</textarea>"
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);
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if (json.url) {
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var regexpr = "(https?://)([^:^/]*)(:\\d*)?(.*)?";
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var regResult = json.url.match(regexpr);
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var urlHost = regResult[1] + regResult[2];
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$('#previewUrl_' + selector).html("<a href='" + json.url + "'>" + urlHost + "</a>");
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}
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images = json.images;
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if (Array.isArray(images)) {
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$('#previewImages_' + selector).show();
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$('#attachmentImageSrc_' + selector).val(bin2hex(images[photoNumber].src));
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$('#attachmentImageWidth_' + selector).val(images[photoNumber].width);
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$('#attachmentImageHeight_' + selector).val(images[photoNumber].height);
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} else {
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$('#previewImages_' + selector).hide();
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}
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images.length = parseInt(images.length);
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var appendImage = "";
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for (i = 0; i < images.length; i++) {
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// For small preview images we use a smaller attachment format.
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// if (Array.isArray(images) && typeof images[i].width !== 'undefined') {
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///@todo here we need to add a check for !Config::get('system', 'always_show_preview').
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if (images[i].width >= 500 && images[i].width >= images[i].height) {
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imageClass = 'attachment-image';
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}
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// }
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if (i === 0) {
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appendImage += "<img id='imagePreview_" + selector + "_" + i + "' src='" + images[i].src + "' class='" + imageClass + "' ></img>";
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} else {
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appendImage += "<img id='imagePreview_" + selector + "_" + i + "' src='" + images[i].src + "' class='" + imageClass + "' style='display: none;'></img>";
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}
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}
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$('#previewImage_' + selector).html(appendImage + "<div id='whiteImage' style='color: transparent; display:none;'>...</div>");
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// More than just one image.
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if (images.length > 1) {
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// Enable the the button to change the preview pictures.
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$('#previewChangeImg_' + selector).show();
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if (firstPosted === false) {
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firstPosted = true;
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$('#previewChangeImg_' + selector).unbind('click').click(function (e) {
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e.stopPropagation();
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if (images.length > 1) {
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$('#imagePreview_' + selector + '_' + photoNumber).css({
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'display': 'none'
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});
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photoNumber += 1;
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// If have reached the last image, begin with the first image.
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if (photoNumber === images.length) {
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photoNumber = 0;
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}
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$('#imagePreview_' + selector + '_' + photoNumber).css({
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'display': 'block'
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});
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$('#photoNumber_' + selector).val(photoNumber);
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$('#attachmentImageSrc_' + selector).val(bin2hex(images[photoNumber].src));
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$('#attachmentImageWidth_' + selector).val(images[photoNumber].width);
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$('#attachmentImageHeight_' + selector).val(images[photoNumber].height);
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}
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});
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}
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}
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processEventListener();
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$('#profile-rotator').hide();
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};
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var processEventListener = function() {
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$('#previewSpanTitle_' + selector).unbind('click').click(function (e) {
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e.stopPropagation();
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if (blockTitle === false) {
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blockTitle = true;
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$('#previewSpanTitle_' + selector).hide();
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$('#previewInputTitle_' + selector).show();
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$('#previewInputTitle_' + selector).val($('#previewInputTitle_' + selector).val());
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$('#previewInputTitle_' + selector).focus().select();
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}
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});
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$('#previewInputTitle_' + selector).blur(function () {
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blockTitle = false;
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$('#previewSpanTitle_' + selector).html($('#previewInputTitle_' + selector).val());
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$('#previewSpanTitle_' + selector).show();
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$('#previewInputTitle_' + selector).hide();
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});
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$('#previewInputTitle_' + selector).keypress(function (e) {
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if (e.which === 13) {
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blockTitle = false;
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$('#previewSpanTitle_' + selector).html($('#previewInputTitle_' + selector).val());
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$('#previewSpanTitle_' + selector).show();
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$('#previewInputTitle_' + selector).hide();
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}
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});
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$('#previewSpanDescription_' + selector).unbind('click').click(function (e) {
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e.stopPropagation();
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if (blockDescription === false) {
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blockDescription = true;
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$('#previewSpanDescription_' + selector).hide();
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$('#previewInputDescription_' + selector).show();
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$('#previewInputDescription_' + selector).val($('#previewInputDescription_' + selector).val());
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$('#previewInputDescription_' + selector).focus().select();
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}
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});
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$('#previewInputDescription_' + selector).blur(function () {
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blockDescription = false;
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$('#previewSpanDescription_' + selector).html($('#previewInputDescription_' + selector).val());
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$('#previewSpanDescription_' + selector).show();
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$('#previewInputDescription_' + selector).hide();
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});
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$('#previewInputDescription_' + selector).keypress(function (e) {
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if (e.which === 13) {
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blockDescription = false;
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$('#previewSpanDescription_' + selector).html($('#previewInputDescription_' + selector).val());
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$('#previewSpanDescription_' + selector).show();
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$('#previewInputDescription_' + selector).hide();
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}
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});
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$('#previewSpanTitle_' + selector).mouseover(function () {
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$('#previewSpanTitle_' + selector).css({
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"background-color": "#ff9"
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});
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});
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$('#previewSpanTitle_' + selector).mouseout(function () {
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$('#previewSpanTitle_' + selector).css({
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"background-color": "transparent"
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});
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});
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$('#previewSpanDescription_' + selector).mouseover(function () {
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$('#previewSpanDescription_' + selector).css({
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"background-color": "#ff9"
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});
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});
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$('#previewSpanDescription_' + selector).mouseout(function () {
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$('#previewSpanDescription_' + selector).css({
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"background-color": "transparent"
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});
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});
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$('#closePreview_' + selector).unbind('click').click(function (e) {
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e.stopPropagation();
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block = false;
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images = '';
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isActive = false;
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firstPosted = false;
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$('#preview_' + selector).fadeOut("fast", function () {
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$('#preview_' + selector).remove();
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$('#profile-rotator').hide();
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});
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});
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};
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var trim = function(str) {
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return str.replace(/^\s+|\s+$/g, "");
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};
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var escapeHTML = function(unsafe_str) {
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return unsafe_str
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.replace(/&/g, '&')
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.replace(/</g, '<')
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.replace(/>/g, '>')
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.replace(/\"/g, '"')
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.replace(/\[/g, '[')
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.replace(/\]/g, ']')
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.replace(/\'/g, '''); // ''' is not valid HTML 4
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}
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// Initialize LinkPreview
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init();
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return {
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// make crawlText() accessable from the outside.
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crawlText: function (text) {
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crawlText(text);
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}
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};
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};
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$.fn.linkPreview.defaults = {
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defaultDescription: "Enter a description",
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defaultTitle: "Enter a title"
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};
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/**
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* Get in a textarea the previous word before the cursor.
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*
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* @param {object} text Textarea elemet.
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* @param {integer} caretPos Cursor position.
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*
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* @returns {string} Previous word.
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*/
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function returnWord(text, caretPos) {
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var index = text.indexOf(caretPos);
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var preText = text.substring(0, caretPos);
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// If the last charachter is a space remove the one space
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// We need this in friendica for the url preview.
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if (preText.slice(-1) == " ") {
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preText = preText.substring(0, preText.length -1);
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}
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if (preText.indexOf(" ") > 0) {
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var words = preText.split(" ");
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return words[words.length - 1]; //return last word
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}
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else {
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return preText;
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}
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}
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/**
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* Get in a textarea the previous word before the cursor.
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*
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* @param {string} id The ID of a textarea element.
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* @returns {sting|null} Previous word or null if no word is available.
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*/
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function getPrevWord(id) {
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var text = document.getElementById(id);
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var caretPos = getCaretPosition(text);
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var word = returnWord(text.value, caretPos);
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if (word != null) {
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return word
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}
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}
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/**
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* Get the cursor posiotion in an text element.
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*
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* @param {object} ctrl Textarea elemet.
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* @returns {integer} Position of the cursor.
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*/
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function getCaretPosition(ctrl) {
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var CaretPos = 0; // IE Support
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if (document.selection) {
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ctrl.focus();
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var Sel = document.selection.createRange();
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Sel.moveStart('character', -ctrl.value.length);
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CaretPos = Sel.text.length;
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}
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// Firefox support
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else if (ctrl.selectionStart || ctrl.selectionStart == '0') {
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CaretPos = ctrl.selectionStart;
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}
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return (CaretPos);
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}
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})(jQuery);
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