define([ "underscore", "crel", "extensions/markdownExtra", "classes/Extension", "text!html/partialRenderingSettingsBlock.html", ], function(_, crel, markdownExtra, Extension, partialRenderingSettingsBlockHTML) { var partialRendering = new Extension("partialRendering", "Partial Rendering", true); partialRendering.settingsBlock = partialRenderingSettingsBlockHTML; var converter; var doFootnotes = false; var hasFootnotes = false; var currentSectionList = []; var sectionList = []; var linkDefinition; var sectionsToRemove = []; var modifiedSections = []; var insertBeforeSection; var fileChanged = false; function updateSectionList() { var newSectionList = []; var newLinkDefinition = '\n'; hasFootnotes = false; _.each(currentSectionList, function(section) { var text = '\n
\n\n' + section.text + '\n\n'; // Strip footnotes if(doFootnotes) { text = text.replace(/^```.*\n[\s\S]*?\n```|\n[ ]{0,3}\[\^(.+?)\]\:[ \t]*\n?([\s\S]*?)\n{1,2}((?=\n[ ]{0,3}\S)|$)/gm, function(wholeMatch, footnote) { if(footnote) { hasFootnotes = true; newLinkDefinition += wholeMatch.replace(/^\s*\n/gm, '') + '\n'; return ""; } return wholeMatch; }); } // Strip link definitions text = text.replace(/^```.*\n[\s\S]*?\n```|^[ ]{0,3}\[(.+)\]:[ \t]*\n?[ \t]*?(?=\s|$)[ \t]*\n?[ \t]*((\n*)["(](.+?)[")][ \t]*)?(?:\n+)/gm, function(wholeMatch, link) { if(link) { newLinkDefinition += wholeMatch.replace(/^\s*\n/gm, '') + '\n'; return ""; } return wholeMatch; }); // Add section to the newSectionList newSectionList.push({ id: section.id, text: text + '\n' }); }); modifiedSections = []; sectionsToRemove = []; insertBeforeSection = undefined; // Render everything if file or linkDefinition changed if(fileChanged === true || linkDefinition != newLinkDefinition) { fileChanged = false; linkDefinition = newLinkDefinition; sectionsToRemove = sectionList; sectionList = newSectionList; modifiedSections = newSectionList; return; } // Find modified section starting from top var leftIndex = sectionList.length; _.some(sectionList, function(section, index) { if(index >= newSectionList.length || section.text != newSectionList[index].text) { leftIndex = index; return true; } }); // Find modified section starting from bottom var rightIndex = -sectionList.length; _.some(sectionList.slice().reverse(), function(section, index) { if(index >= newSectionList.length || section.text != newSectionList[newSectionList.length - index - 1].text) { rightIndex = -index; return true; } }); if(leftIndex - rightIndex > sectionList.length) { // Prevent overlap rightIndex = leftIndex - sectionList.length; } // Create an array composed of left unmodified, modified, right // unmodified sections var leftSections = sectionList.slice(0, leftIndex); modifiedSections = newSectionList.slice(leftIndex, newSectionList.length + rightIndex); var rightSections = sectionList.slice(sectionList.length + rightIndex, sectionList.length); insertBeforeSection = _.first(rightSections); sectionsToRemove = sectionList.slice(leftIndex, sectionList.length + rightIndex); sectionList = leftSections.concat(modifiedSections).concat(rightSections); } var footnoteMap = {}; // Store one footnote elt in the footnote map function storeFootnote(footnoteElt) { var id = footnoteElt.id.substring(3); footnoteMap[id] = footnoteElt; } var footnoteContainerElt; var previewContentsElt; function refreshSections() { // Remove outdated sections _.each(sectionsToRemove, function(section) { var sectionElt = document.getElementById("wmd-preview-section-" + section.id); previewContentsElt.removeChild(sectionElt); }); var wmdPreviewElt = document.getElementById("wmd-preview"); var childNode = wmdPreviewElt.firstChild; function createSectionElt(section) { var sectionElt = crel('div', { id: 'wmd-preview-section-' + section.id, class: 'wmd-preview-section preview-content' }); var isNextDelimiter = false; while(childNode) { var nextNode = childNode.nextSibling; var isDelimiter = childNode.className == 'se-preview-section-delimiter'; if(isNextDelimiter === true && childNode.tagName == 'DIV' && isDelimiter) { // Stop when encountered the next delimiter break; } isNextDelimiter = true; if(childNode.tagName == 'DIV' && childNode.className == 'footnotes') { _.each(childNode.querySelectorAll("ol > li"), storeFootnote); } else { isDelimiter || sectionElt.appendChild(childNode); } childNode = nextNode; } return sectionElt; } var newSectionEltList = document.createDocumentFragment(); _.each(modifiedSections, function(section) { newSectionEltList.appendChild(createSectionElt(section)); }); wmdPreviewElt.innerHTML = ''; var insertBeforeElt = footnoteContainerElt; if(insertBeforeSection !== undefined) { insertBeforeElt = document.getElementById("wmd-preview-section-" + insertBeforeSection.id); } previewContentsElt.insertBefore(newSectionEltList, insertBeforeElt); // Rewrite footnotes in the footer and update footnote numbers footnoteContainerElt.innerHTML = ''; var usedFootnoteIds = []; if(hasFootnotes === true) { var footnoteElts = crel('ol'); _.each(previewContentsElt.querySelectorAll('a.footnote'), function(elt, index) { elt.textContent = index + 1; var id = elt.id.substring(6); usedFootnoteIds.push(id); var footnoteElt = footnoteMap[id]; footnoteElt && footnoteElts.appendChild(footnoteElt.cloneNode(true)); }); if(usedFootnoteIds.length > 0) { // Append the whole footnotes at the end of the document footnoteContainerElt.appendChild(crel('div', { class: 'footnotes' }, crel('hr'), footnoteElts)); } // Keep used footnotes only in our map footnoteMap = _.pick(footnoteMap, usedFootnoteIds); } } partialRendering.onSectionsCreated = function(sectionListParam) { currentSectionList = sectionListParam; }; partialRendering.onPagedownConfigure = function(editor) { converter = editor.getConverter(); converter.hooks.chain("preConversion", function() { updateSectionList(); var result = _.map(modifiedSections, function(section) { return section.text; }); result.push(linkDefinition + "\n\n"); return result.join(""); }); editor.hooks.chain("onPreviewRefresh", function() { refreshSections(); }); }; partialRendering.onInit = function() { if(markdownExtra.enabled) { if(_.some(markdownExtra.config.extensions, function(extension) { return extension == "footnotes"; })) { doFootnotes = true; } } }; partialRendering.onReady = function() { footnoteContainerElt = crel('div', { id: 'wmd-preview-section-footnotes', class: 'preview-content' }); previewContentsElt = document.getElementById("preview-contents"); previewContentsElt.appendChild(footnoteContainerElt); }; partialRendering.onFileSelected = function() { fileChanged = true; }; return partialRendering; });