pad.pub0.org/node/utils/ExportDokuWiki.js

346 lines
8.5 KiB
JavaScript

/**
* Copyright 2011 Adrian Lang
*
* 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 CommonCode = require('./common_code');
var Changeset = CommonCode.require("/Changeset");
var padManager = require("../db/PadManager");
function getPadDokuWiki(pad, revNum, callback)
{
var atext = pad.atext;
var dokuwiki;
async.waterfall([
// fetch revision atext
function (callback)
{
if (revNum != undefined)
{
pad.getInternalRevisionAText(revNum, function (err, revisionAtext)
{
atext = revisionAtext;
callback(err);
});
}
else
{
callback(null);
}
},
// convert atext to dokuwiki text
function (callback)
{
dokuwiki = getDokuWikiFromAtext(pad, atext);
callback(null);
}],
// run final callback
function (err)
{
callback(err, dokuwiki);
});
}
function getDokuWikiFromAtext(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 = ['======', '=====', '**', '//', '__', 'del>'];
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 getLineDokuWiki(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();
function emitOpenTag(i)
{
if (tags[i].indexOf('>') !== -1) {
assem.append('<');
}
assem.append(tags[i]);
}
function emitCloseTag(i)
{
if (tags[i].indexOf('>') !== -1) {
assem.append('</');
}
assem.append(tags[i]);
}
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
}
}
}
for (var i = propVals.length - 1; i >= 0; i--)
{
if (propVals[i] === LEAVE)
{
emitCloseTag(i);
propVals[i] = false;
}
else if (propVals[i] === STAY)
{
emitCloseTag(i);
}
}
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);
assem.append(_escapeDokuWiki(s));
} // end iteration over spans in line
for (var i = propVals.length - 1; i >= 0; i--)
{
if (propVals[i])
{
emitCloseTag(i);
propVals[i] = false;
}
}
} // 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('[[');
// Do not use processNextChars since a link does not contain syntax and
// needs no escaping
var iter = Changeset.opIterator(Changeset.subattribution(attribs, idx, idx + urlLength));
idx += urlLength;
assem.append(taker.take(iter.next().chars));
assem.append(']]');
});
}
processNextChars(text.length - idx);
return assem.toString() + "\n";
} // end getLineDokuWiki
var pieces = [];
for (var i = 0; i < textLines.length; i++)
{
var line = _analyzeLine(textLines[i], attribLines[i], apool);
var lineContent = getLineDokuWiki(line.text, line.aline);
if (line.listLevel && lineContent)
{
pieces.push(new Array(line.listLevel + 1).join(' ') + '* ');
}
pieces.push(lineContent);
}
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.getPadDokuWikiDocument = function (padId, revNum, callback)
{
padManager.getPad(padId, function (err, pad)
{
if (err)
{
callback(err);
return;
}
getPadDokuWiki(pad, revNum, callback);
});
}
function _escapeDokuWiki(s)
{
s = s.replace(/(\/\/|\*\*|__)/g, '%%$1%%');
return s;
}
// copied from ACE
var _REGEX_WORDCHAR = /[\u0030-\u0039\u0041-\u005A\u0061-\u007A\u00C0-\u00D6\u00D8-\u00F6\u00F8-\u00FF\u0100-\u1FFF\u3040-\u9FFF\uF900-\uFDFF\uFE70-\uFEFE\uFF10-\uFF19\uFF21-\uFF3A\uFF41-\uFF5A\uFF66-\uFFDC]/;
var _REGEX_SPACE = /\s/;
var _REGEX_URLCHAR = new RegExp('(' + /[-:@a-zA-Z0-9_.,~%+\/\\?=&#;()$]/.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;
}