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Diffstat (limited to 'src/node/utils/ExportHtml.js')
| -rw-r--r-- | src/node/utils/ExportHtml.js | 595 |
1 files changed, 595 insertions, 0 deletions
diff --git a/src/node/utils/ExportHtml.js b/src/node/utils/ExportHtml.js new file mode 100644 index 00000000..91ebe59f --- /dev/null +++ b/src/node/utils/ExportHtml.js @@ -0,0 +1,595 @@ +/** + * Copyright 2009 Google Inc. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS-IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + + +var async = require("async"); +var Changeset = require("ep_etherpad-lite/static/js/Changeset"); +var padManager = require("../db/PadManager"); +var ERR = require("async-stacktrace"); +var Security = require('ep_etherpad-lite/static/js/security'); + +function getPadPlainText(pad, revNum) +{ + var atext = ((revNum !== undefined) ? pad.getInternalRevisionAText(revNum) : pad.atext()); + var textLines = atext.text.slice(0, -1).split('\n'); + var attribLines = Changeset.splitAttributionLines(atext.attribs, atext.text); + var apool = pad.pool(); + + var pieces = []; + for (var i = 0; i < textLines.length; i++) + { + var line = _analyzeLine(textLines[i], attribLines[i], apool); + if (line.listLevel) + { + var numSpaces = line.listLevel * 2 - 1; + var bullet = '*'; + pieces.push(new Array(numSpaces + 1).join(' '), bullet, ' ', line.text, '\n'); + } + else + { + pieces.push(line.text, '\n'); + } + } + + return pieces.join(''); +} + +function getPadHTML(pad, revNum, callback) +{ + var atext = pad.atext; + var html; + async.waterfall([ + // fetch revision atext + + + function (callback) + { + if (revNum != undefined) + { + pad.getInternalRevisionAText(revNum, function (err, revisionAtext) + { + if(ERR(err, callback)) return; + atext = revisionAtext; + callback(); + }); + } + else + { + callback(null); + } + }, + + // convert atext to html + + + function (callback) + { + html = getHTMLFromAtext(pad, atext); + callback(null); + }], + // run final callback + + + function (err) + { + if(ERR(err, callback)) return; + callback(null, html); + }); +} + +exports.getPadHTML = getPadHTML; + +function getHTMLFromAtext(pad, atext) +{ + var apool = pad.apool(); + var textLines = atext.text.slice(0, -1).split('\n'); + var attribLines = Changeset.splitAttributionLines(atext.attribs, atext.text); + + var tags = ['h1', 'h2', 'strong', 'em', 'u', 's']; + var props = ['heading1', 'heading2', 'bold', 'italic', 'underline', 'strikethrough']; + var anumMap = {}; + + props.forEach(function (propName, i) + { + var propTrueNum = apool.putAttrib([propName, true], true); + if (propTrueNum >= 0) + { + anumMap[propTrueNum] = i; + } + }); + + function getLineHTML(text, attribs) + { + var propVals = [false, false, false]; + var ENTER = 1; + var STAY = 2; + var LEAVE = 0; + + // Use order of tags (b/i/u) as order of nesting, for simplicity + // and decent nesting. For example, + // <b>Just bold<b> <b><i>Bold and italics</i></b> <i>Just italics</i> + // becomes + // <b>Just bold <i>Bold and italics</i></b> <i>Just italics</i> + var taker = Changeset.stringIterator(text); + var assem = Changeset.stringAssembler(); + + var openTags = []; + function emitOpenTag(i) + { + openTags.unshift(i); + assem.append('<'); + assem.append(tags[i]); + assem.append('>'); + } + + function emitCloseTag(i) + { + openTags.shift(); + assem.append('</'); + assem.append(tags[i]); + assem.append('>'); + } + + function orderdCloseTags(tags2close) + { + for(var i=0;i<openTags.length;i++) + { + for(var j=0;j<tags2close.length;j++) + { + if(tags2close[j] == openTags[i]) + { + emitCloseTag(tags2close[j]); + i--; + break; + } + } + } + } + + var urls = _findURLs(text); + + var idx = 0; + + function processNextChars(numChars) + { + if (numChars <= 0) + { + return; + } + + var iter = Changeset.opIterator(Changeset.subattribution(attribs, idx, idx + numChars)); + idx += numChars; + + while (iter.hasNext()) + { + var o = iter.next(); + var propChanged = false; + Changeset.eachAttribNumber(o.attribs, function (a) + { + if (a in anumMap) + { + var i = anumMap[a]; // i = 0 => bold, etc. + if (!propVals[i]) + { + propVals[i] = ENTER; + propChanged = true; + } + else + { + propVals[i] = STAY; + } + } + }); + for (var i = 0; i < propVals.length; i++) + { + if (propVals[i] === true) + { + propVals[i] = LEAVE; + propChanged = true; + } + else if (propVals[i] === STAY) + { + propVals[i] = true; // set it back + } + } + // now each member of propVal is in {false,LEAVE,ENTER,true} + // according to what happens at start of span + if (propChanged) + { + // leaving bold (e.g.) also leaves italics, etc. + var left = false; + for (var i = 0; i < propVals.length; i++) + { + var v = propVals[i]; + if (!left) + { + if (v === LEAVE) + { + left = true; + } + } + else + { + if (v === true) + { + propVals[i] = STAY; // tag will be closed and re-opened + } + } + } + + var tags2close = []; + + for (var i = propVals.length - 1; i >= 0; i--) + { + if (propVals[i] === LEAVE) + { + //emitCloseTag(i); + tags2close.push(i); + propVals[i] = false; + } + else if (propVals[i] === STAY) + { + //emitCloseTag(i); + tags2close.push(i); + } + } + + orderdCloseTags(tags2close); + + for (var i = 0; i < propVals.length; i++) + { + if (propVals[i] === ENTER || propVals[i] === STAY) + { + emitOpenTag(i); + propVals[i] = true; + } + } + // propVals is now all {true,false} again + } // end if (propChanged) + var chars = o.chars; + if (o.lines) + { + chars--; // exclude newline at end of line, if present + } + + var s = taker.take(chars); + + //removes the characters with the code 12. Don't know where they come + //from but they break the abiword parser and are completly useless + s = s.replace(String.fromCharCode(12), ""); + + assem.append(_encodeWhitespace(Security.escapeHTML(s))); + } // end iteration over spans in line + + var tags2close = []; + for (var i = propVals.length - 1; i >= 0; i--) + { + if (propVals[i]) + { + tags2close.push(i); + propVals[i] = false; + } + } + + orderdCloseTags(tags2close); + } // end processNextChars + if (urls) + { + urls.forEach(function (urlData) + { + var startIndex = urlData[0]; + var url = urlData[1]; + var urlLength = url.length; + processNextChars(startIndex - idx); + assem.append('<a href="' + Security.escapeHTMLAttribute(url) + '">'); + processNextChars(urlLength); + assem.append('</a>'); + }); + } + processNextChars(text.length - idx); + + return _processSpaces(assem.toString()); + } // end getLineHTML + var pieces = []; + + // Need to deal with constraints imposed on HTML lists; can + // only gain one level of nesting at once, can't change type + // mid-list, etc. + // People might use weird indenting, e.g. skip a level, + // so we want to do something reasonable there. We also + // want to deal gracefully with blank lines. + // => keeps track of the parents level of indentation + var lists = []; // e.g. [[1,'bullet'], [3,'bullet'], ...] + for (var i = 0; i < textLines.length; i++) + { + var line = _analyzeLine(textLines[i], attribLines[i], apool); + var lineContent = getLineHTML(line.text, line.aline); + + if (line.listLevel)//If we are inside a list + { + // do list stuff + var whichList = -1; // index into lists or -1 + if (line.listLevel) + { + whichList = lists.length; + for (var j = lists.length - 1; j >= 0; j--) + { + if (line.listLevel <= lists[j][0]) + { + whichList = j; + } + } + } + + if (whichList >= lists.length)//means we are on a deeper level of indentation than the previous line + { + lists.push([line.listLevel, line.listTypeName]); + if(line.listTypeName == "number") + { + pieces.push('<ol class="'+line.listTypeName+'"><li>', lineContent || '<br>'); + } + else + { + pieces.push('<ul class="'+line.listTypeName+'"><li>', lineContent || '<br>'); + } + } + //the following code *seems* dead after my patch. + //I keep it just in case I'm wrong... + /*else if (whichList == -1)//means we are not inside a list + { + if (line.text) + { + console.log('trace 1'); + // non-blank line, end all lists + if(line.listTypeName == "number") + { + pieces.push(new Array(lists.length + 1).join('</li></ol>')); + } + else + { + pieces.push(new Array(lists.length + 1).join('</li></ul>')); + } + lists.length = 0; + pieces.push(lineContent, '<br>'); + } + else + { + console.log('trace 2'); + pieces.push('<br><br>'); + } + }*/ + else//means we are getting closer to the lowest level of indentation + { + while (whichList < lists.length - 1) + { + if(lists[lists.length - 1][1] == "number") + { + pieces.push('</li></ol>'); + } + else + { + pieces.push('</li></ul>'); + } + lists.length--; + } + pieces.push('</li><li>', lineContent || '<br>'); + } + } + else//outside any list + { + while (lists.length > 0)//if was in a list: close it before + { + if(lists[lists.length - 1][1] == "number") + { + pieces.push('</li></ol>'); + } + else + { + pieces.push('</li></ul>'); + } + lists.length--; + } + pieces.push(lineContent, '<br>'); + } + } + + for (var k = lists.length - 1; k >= 0; k--) + { + if(lists[k][1] == "number") + { + pieces.push('</li></ol>'); + } + else + { + pieces.push('</li></ul>'); + } + } + + return pieces.join(''); +} + +function _analyzeLine(text, aline, apool) +{ + var line = {}; + + // identify list + var lineMarker = 0; + line.listLevel = 0; + if (aline) + { + var opIter = Changeset.opIterator(aline); + if (opIter.hasNext()) + { + var listType = Changeset.opAttributeValue(opIter.next(), 'list', apool); + if (listType) + { + lineMarker = 1; + listType = /([a-z]+)([12345678])/.exec(listType); + if (listType) + { + line.listTypeName = listType[1]; + line.listLevel = Number(listType[2]); + } + } + } + } + if (lineMarker) + { + line.text = text.substring(1); + line.aline = Changeset.subattribution(aline, 1); + } + else + { + line.text = text; + line.aline = aline; + } + + return line; +} + +exports.getPadHTMLDocument = function (padId, revNum, noDocType, callback) +{ + padManager.getPad(padId, function (err, pad) + { + if(ERR(err, callback)) return; + + var head = + (noDocType ? '' : '<!doctype html>\n') + + '<html lang="en">\n' + (noDocType ? '' : '<head>\n' + + '<meta charset="utf-8">\n' + + '<style> * { font-family: arial, sans-serif;\n' + + 'font-size: 13px;\n' + + 'line-height: 17px; }' + + 'ul.indent { list-style-type: none; }' + + 'ol { list-style-type: decimal; }' + + 'ol ol { list-style-type: lower-latin; }' + + 'ol ol ol { list-style-type: lower-roman; }' + + 'ol ol ol ol { list-style-type: decimal; }' + + 'ol ol ol ol ol { list-style-type: lower-latin; }' + + 'ol ol ol ol ol ol{ list-style-type: lower-roman; }' + + 'ol ol ol ol ol ol ol { list-style-type: decimal; }' + + 'ol ol ol ol ol ol ol ol{ list-style-type: lower-latin; }' + + '</style>\n' + '</head>\n') + + '<body>'; + + var foot = '</body>\n</html>\n'; + + getPadHTML(pad, revNum, function (err, html) + { + if(ERR(err, callback)) return; + callback(null, head + html + foot); + }); + }); +} + +function _encodeWhitespace(s) { + return s.replace(/[^\x21-\x7E\s\t\n\r]/g, function(c) + { + return "&#" +c.charCodeAt(0) + ";" + }); +} + +// copied from ACE + + +function _processSpaces(s) +{ + var doesWrap = true; + if (s.indexOf("<") < 0 && !doesWrap) + { + // short-cut + return s.replace(/ /g, ' '); + } + var parts = []; + s.replace(/<[^>]*>?| |[^ <]+/g, function (m) + { + parts.push(m); + }); + if (doesWrap) + { + var endOfLine = true; + var beforeSpace = false; + // last space in a run is normal, others are nbsp, + // end of line is nbsp + for (var i = parts.length - 1; i >= 0; i--) + { + var p = parts[i]; + if (p == " ") + { + if (endOfLine || beforeSpace) parts[i] = ' '; + endOfLine = false; + beforeSpace = true; + } + else if (p.charAt(0) != "<") + { + endOfLine = false; + beforeSpace = false; + } + } + // beginning of line is nbsp + for (var i = 0; i < parts.length; i++) + { + var p = parts[i]; + if (p == " ") + { + parts[i] = ' '; + break; + } + else if (p.charAt(0) != "<") + { + break; + } + } + } + else + { + for (var i = 0; i < parts.length; i++) + { + var p = parts[i]; + if (p == " ") + { + parts[i] = ' '; + } + } + } + return parts.join(''); +} + + +// copied from ACE +var _REGEX_WORDCHAR = /[\u0030-\u0039\u0041-\u005A\u0061-\u007A\u00C0-\u00D6\u00D8-\u00F6\u00F8-\u00FF\u0100-\u1FFF\u3040-\u9FFF\uF900-\uFDFF\uFE70-\uFEFE\uFF10-\uFF19\uFF21-\uFF3A\uFF41-\uFF5A\uFF66-\uFFDC]/; +var _REGEX_SPACE = /\s/; +var _REGEX_URLCHAR = new RegExp('(' + /[-:@a-zA-Z0-9_.,~%+\/\\?=&#;()$]/.source + '|' + _REGEX_WORDCHAR.source + ')'); +var _REGEX_URL = new RegExp(/(?:(?:https?|s?ftp|ftps|file|smb|afp|nfs|(x-)?man|gopher|txmt):\/\/|mailto:)/.source + _REGEX_URLCHAR.source + '*(?![:.,;])' + _REGEX_URLCHAR.source, 'g'); + +// returns null if no URLs, or [[startIndex1, url1], [startIndex2, url2], ...] + + +function _findURLs(text) +{ + _REGEX_URL.lastIndex = 0; + var urls = null; + var execResult; + while ((execResult = _REGEX_URL.exec(text))) + { + urls = (urls || []); + var startIndex = execResult.index; + var url = execResult[0]; + urls.push([startIndex, url]); + } + + return urls; +} |