345 lines
8.4 KiB
JavaScript
345 lines
8.4 KiB
JavaScript
/**
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* Copyright 2011 Adrian Lang
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS-IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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var async = require("async");
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var Changeset = require("./Changeset");
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var padManager = require("../db/PadManager");
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function getPadDokuWiki(pad, revNum, callback)
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{
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var atext = pad.atext;
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var dokuwiki;
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async.waterfall([
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// fetch revision atext
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function (callback)
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{
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if (revNum != undefined)
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{
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pad.getInternalRevisionAText(revNum, function (err, revisionAtext)
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{
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atext = revisionAtext;
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callback(err);
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});
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}
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else
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{
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callback(null);
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}
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},
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// convert atext to dokuwiki text
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function (callback)
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{
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dokuwiki = getDokuWikiFromAtext(pad, atext);
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callback(null);
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}],
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// run final callback
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function (err)
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{
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callback(err, dokuwiki);
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});
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}
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function getDokuWikiFromAtext(pad, atext)
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{
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var apool = pad.apool();
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var textLines = atext.text.slice(0, -1).split('\n');
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var attribLines = Changeset.splitAttributionLines(atext.attribs, atext.text);
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var tags = ['======', '=====', '**', '//', '__', 'del>'];
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var props = ['heading1', 'heading2', 'bold', 'italic', 'underline', 'strikethrough'];
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var anumMap = {};
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props.forEach(function (propName, i)
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{
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var propTrueNum = apool.putAttrib([propName, true], true);
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if (propTrueNum >= 0)
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{
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anumMap[propTrueNum] = i;
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}
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});
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function getLineDokuWiki(text, attribs)
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{
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var propVals = [false, false, false];
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var ENTER = 1;
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var STAY = 2;
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var LEAVE = 0;
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// Use order of tags (b/i/u) as order of nesting, for simplicity
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// and decent nesting. For example,
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// <b>Just bold<b> <b><i>Bold and italics</i></b> <i>Just italics</i>
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// becomes
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// <b>Just bold <i>Bold and italics</i></b> <i>Just italics</i>
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var taker = Changeset.stringIterator(text);
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var assem = Changeset.stringAssembler();
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function emitOpenTag(i)
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{
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if (tags[i].indexOf('>') !== -1) {
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assem.append('<');
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}
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assem.append(tags[i]);
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}
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function emitCloseTag(i)
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{
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if (tags[i].indexOf('>') !== -1) {
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assem.append('</');
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}
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assem.append(tags[i]);
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}
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var urls = _findURLs(text);
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var idx = 0;
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function processNextChars(numChars)
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{
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if (numChars <= 0)
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{
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return;
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}
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var iter = Changeset.opIterator(Changeset.subattribution(attribs, idx, idx + numChars));
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idx += numChars;
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while (iter.hasNext())
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{
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var o = iter.next();
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var propChanged = false;
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Changeset.eachAttribNumber(o.attribs, function (a)
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{
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if (a in anumMap)
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{
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var i = anumMap[a]; // i = 0 => bold, etc.
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if (!propVals[i])
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{
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propVals[i] = ENTER;
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propChanged = true;
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}
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else
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{
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propVals[i] = STAY;
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}
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}
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});
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for (var i = 0; i < propVals.length; i++)
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{
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if (propVals[i] === true)
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{
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propVals[i] = LEAVE;
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propChanged = true;
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}
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else if (propVals[i] === STAY)
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{
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propVals[i] = true; // set it back
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}
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}
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// now each member of propVal is in {false,LEAVE,ENTER,true}
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// according to what happens at start of span
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if (propChanged)
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{
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// leaving bold (e.g.) also leaves italics, etc.
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var left = false;
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for (var i = 0; i < propVals.length; i++)
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{
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var v = propVals[i];
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if (!left)
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{
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if (v === LEAVE)
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{
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left = true;
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}
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}
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else
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{
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if (v === true)
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{
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propVals[i] = STAY; // tag will be closed and re-opened
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}
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}
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}
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for (var i = propVals.length - 1; i >= 0; i--)
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{
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if (propVals[i] === LEAVE)
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{
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emitCloseTag(i);
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propVals[i] = false;
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}
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else if (propVals[i] === STAY)
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{
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emitCloseTag(i);
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}
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}
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for (var i = 0; i < propVals.length; i++)
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{
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if (propVals[i] === ENTER || propVals[i] === STAY)
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{
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emitOpenTag(i);
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propVals[i] = true;
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}
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}
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// propVals is now all {true,false} again
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} // end if (propChanged)
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var chars = o.chars;
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if (o.lines)
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{
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chars--; // exclude newline at end of line, if present
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}
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var s = taker.take(chars);
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assem.append(_escapeDokuWiki(s));
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} // end iteration over spans in line
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for (var i = propVals.length - 1; i >= 0; i--)
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{
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if (propVals[i])
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{
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emitCloseTag(i);
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propVals[i] = false;
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}
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}
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} // end processNextChars
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if (urls)
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{
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urls.forEach(function (urlData)
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{
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var startIndex = urlData[0];
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var url = urlData[1];
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var urlLength = url.length;
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processNextChars(startIndex - idx);
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assem.append('[[');
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// Do not use processNextChars since a link does not contain syntax and
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// needs no escaping
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var iter = Changeset.opIterator(Changeset.subattribution(attribs, idx, idx + urlLength));
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idx += urlLength;
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assem.append(taker.take(iter.next().chars));
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assem.append(']]');
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});
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}
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processNextChars(text.length - idx);
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return assem.toString() + "\n";
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} // end getLineDokuWiki
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var pieces = [];
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for (var i = 0; i < textLines.length; i++)
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{
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var line = _analyzeLine(textLines[i], attribLines[i], apool);
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var lineContent = getLineDokuWiki(line.text, line.aline);
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if (line.listLevel && lineContent)
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{
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pieces.push(new Array(line.listLevel + 1).join(' ') + '* ');
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}
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pieces.push(lineContent);
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}
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return pieces.join('');
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}
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function _analyzeLine(text, aline, apool)
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{
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var line = {};
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// identify list
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var lineMarker = 0;
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line.listLevel = 0;
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if (aline)
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{
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var opIter = Changeset.opIterator(aline);
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if (opIter.hasNext())
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{
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var listType = Changeset.opAttributeValue(opIter.next(), 'list', apool);
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if (listType)
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{
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lineMarker = 1;
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listType = /([a-z]+)([12345678])/.exec(listType);
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if (listType)
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{
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line.listTypeName = listType[1];
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line.listLevel = Number(listType[2]);
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}
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}
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}
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}
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if (lineMarker)
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{
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line.text = text.substring(1);
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line.aline = Changeset.subattribution(aline, 1);
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}
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else
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{
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line.text = text;
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line.aline = aline;
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}
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return line;
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}
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exports.getPadDokuWikiDocument = function (padId, revNum, callback)
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{
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padManager.getPad(padId, function (err, pad)
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{
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if (err)
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{
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callback(err);
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return;
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}
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getPadDokuWiki(pad, revNum, callback);
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});
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}
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function _escapeDokuWiki(s)
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{
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s = s.replace(/(\/\/|\*\*|__)/g, '%%$1%%');
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return s;
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}
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// copied from ACE
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var _REGEX_WORDCHAR = /[\u0030-\u0039\u0041-\u005A\u0061-\u007A\u00C0-\u00D6\u00D8-\u00F6\u00F8-\u00FF\u0100-\u1FFF\u3040-\u9FFF\uF900-\uFDFF\uFE70-\uFEFE\uFF10-\uFF19\uFF21-\uFF3A\uFF41-\uFF5A\uFF66-\uFFDC]/;
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var _REGEX_SPACE = /\s/;
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var _REGEX_URLCHAR = new RegExp('(' + /[-:@a-zA-Z0-9_.,~%+\/\\?=&#;()$]/.source + '|' + _REGEX_WORDCHAR.source + ')');
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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');
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// returns null if no URLs, or [[startIndex1, url1], [startIndex2, url2], ...]
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function _findURLs(text)
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{
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_REGEX_URL.lastIndex = 0;
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var urls = null;
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var execResult;
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while ((execResult = _REGEX_URL.exec(text)))
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{
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urls = (urls || []);
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var startIndex = execResult.index;
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var url = execResult[0];
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urls.push([startIndex, url]);
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}
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return urls;
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}
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