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);
}
}
for (var i = 0; i < propVals.length; i++)
{
if (propVals[i] === ENTER || propVals[i] === STAY)
{
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), "");
// remove * from s, it's just not needed on a blank line.. This stops
// plugins from being able to display * at the beginning of a line
// s = s.replace("*", ""); // Then remove it
assem.append(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;
}
}
} // end processNextChars
//create the changeset
function(callback)
{
//ex. _checkChangesetAndPool
try
{
// Verify that the changeset has valid syntax and is in canonical form
Changeset.checkRep(changeset);
// Verify that the attribute indexes used in the changeset are all
// defined in the accompanying attribute pool.
Changeset.eachAttribNumber(changeset, function(n) {
if (! wireApool.getAttrib(n)) {
throw "Attribute pool is missing attribute "+n+" for changeset "+changeset;
}
});
}
catch(e)
{
// There is an error in this changeset, so just refuse it
console.warn("Can't apply USER_CHANGES "+changeset+", because it failed checkRep");
client.json.send({disconnect:"badChangeset"});
return;
}
//ex. adoptChangesetAttribs
//Afaik, it copies the new attributes from the changeset, to the global Attribute Pool
changeset = Changeset.moveOpsToNewPool(changeset, wireApool, pad.pool);
//ex. applyUserChanges
apool = pad.pool;
r = baseRev;
// The client's changeset might not be based on the latest revision,
// since other clients are sending changes at the same time.
// Update the changeset so that it can be applied to the latest revision.
//https://github.com/caolan/async#whilst
async.whilst(
function() { return r < pad.getHeadRevisionNumber(); },
function(callback)
{
r++;
pad.getRevisionChangeset(r, function(err, c)
{
if(ERR(err, callback)) return;
// At this point, both "c" (from the pad) and "changeset" (from the
// client) are relative to revision r - 1. The follow function
// rebases "changeset" so that it is relative to revision r
// and can be applied after "c".
changeset = Changeset.follow(c, changeset, false, apool);
if ((r - baseRev) % 200 == 0) { // don't let the stack get too deep
async.nextTick(callback);
} else {
callback(null);
}
});
},
//use the callback of the series function
callback
);
},
//create the changeset
function(callback)
{
//ex. _checkChangesetAndPool
try
{
// Verify that the changeset has valid syntax and is in canonical form
Changeset.checkRep(changeset);
// Verify that the attribute indexes used in the changeset are all
// defined in the accompanying attribute pool.
Changeset.eachAttribNumber(changeset, function(n) {
if (! wireApool.getAttrib(n)) {
throw "Attribute pool is missing attribute "+n+" for changeset "+changeset;
}
});
// Validate all added 'author' attribs to be the same value as the current user
var iterator = Changeset.opIterator(Changeset.unpack(changeset).ops)
, op
while(iterator.hasNext()) {
op = iterator.next()
if(op.opcode != '+') continue;
op.attribs.split('*').forEach(function(attr) {
if(!attr) return
attr = wireApool.getAttrib(attr)
if(!attr) return
if('author' == attr[0] && attr[1] != thisSession.author) throw "Trying to submit changes as another author"
})
}
}
catch(e)
{
// There is an error in this changeset, so just refuse it
console.warn("Can't apply USER_CHANGES "+changeset+", because: "+e);
client.json.send({disconnect:"badChangeset"});
return;
}
//ex. adoptChangesetAttribs
//Afaik, it copies the new attributes from the changeset, to the global Attribute Pool
changeset = Changeset.moveOpsToNewPool(changeset, wireApool, pad.pool);
//ex. applyUserChanges
apool = pad.pool;
r = baseRev;
// The client's changeset might not be based on the latest revision,
// since other clients are sending changes at the same time.
// Update the changeset so that it can be applied to the latest revision.
//https://github.com/caolan/async#whilst
async.whilst(
function() { return r < pad.getHeadRevisionNumber(); },
function(callback)
{
r++;
pad.getRevisionChangeset(r, function(err, c)
{
if(ERR(err, callback)) return;
// At this point, both "c" (from the pad) and "changeset" (from the
// client) are relative to revision r - 1. The follow function
// rebases "changeset" so that it is relative to revision r
// and can be applied after "c".
try
{
changeset = Changeset.follow(c, changeset, false, apool);
}catch(e){
console.warn("Can't apply USER_CHANGES "+changeset+", possibly because of mismatched follow error");
client.json.send({disconnect:"badChangeset"});
return;
}
if ((r - baseRev) % 200 == 0) { // don't let the stack get too deep
async.nextTick(callback);
} else {
callback(null);
}
});
},
//use the callback of the series function
callback
);
},
function processNextChars(numChars)
{
if (numChars <= 0)
{
return;
}
var iter = Changeset.opIterator(Changeset.subattribution(attribs, idx, idx + numChars));
idx += numChars;
while (iter.hasNext())
{
var isSciflowCite = false;
var isSciflowGraphic = false;
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;
}
}
if (a in sciflowMap) {
if (sciflowProps[sciflowMap[a]] === 'sciflow-graphic') {
isSciflowGraphic = a;
} else if (sciflowProps[sciflowMap[a]] === 'sciflow-cite'){
isSciflowCite = a;
}
}
});
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), "");
// is a cite
if (isSciflowCite) {
var id = apool.getAttrib(isSciflowCite);
s = '\\cite{' + id[1] + '}';
}
// is a graphic
if (isSciflowGraphic) {
var id = apool.getAttrib(isSciflowGraphic);
var image = imageDatastore[id[1]];
if (image) {
s = '\\begin{figure}\n \\centering\n'+
'\\includegraphics[width=\\columnwidth, keepaspectratio=true]{' +image.filename + '}\n' +
'\\caption{' + image.caption + '}\n\\label{' + image.id + '}\n\\end{figure}';
}
}
// delete * if this line is a heading
if (heading && !deletedAsterisk) {
s = s.substring(1);
deletedAsterisk = true;
}
assem.append(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
function getLineLatex(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('}');
}
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;
}
}
}
}
// start heading check
var heading = false;
var deletedAsterisk = false; // we need to delete * from the beginning of the heading line
var iter2 = Changeset.opIterator(Changeset.subattribution(attribs, 0, 1));
if (iter2.hasNext()) {
var o2 = iter2.next();
// iterate through attributes
Changeset.eachAttribNumber(o2.attribs, function (a) {
if (a in headinganumMap)
{
var i = headinganumMap[a]; // i = 0 => bold, etc.
heading = headingtags[i];
}
});
}
if (heading) {
assem.append('\\'+heading+'{');
}
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 isSciflowCite = false;
var isSciflowGraphic = false;
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;
}
}
if (a in sciflowMap) {
if (sciflowProps[sciflowMap[a]] === 'sciflow-graphic') {
isSciflowGraphic = a;
} else if (sciflowProps[sciflowMap[a]] === 'sciflow-cite'){
isSciflowCite = a;
}
}
});
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), "");
// is a cite
if (isSciflowCite) {
var id = apool.getAttrib(isSciflowCite);
s = '\\cite{' + id[1] + '}';
}
// is a graphic
if (isSciflowGraphic) {
var id = apool.getAttrib(isSciflowGraphic);
var image = imageDatastore[id[1]];
if (image) {
s = '\\begin{figure}\n \\centering\n'+
'\\includegraphics[width=\\columnwidth, keepaspectratio=true]{' +image.filename + '}\n' +
'\\caption{' + image.caption + '}\n\\label{' + image.id + '}\n\\end{figure}';
}
}
// delete * if this line is a heading
if (heading && !deletedAsterisk) {
s = s.substring(1);
deletedAsterisk = true;
}
assem.append(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('\\url{');
processNextChars(urlLength);
assem.append('}');
});
}
processNextChars(text.length - idx);
if (heading) {
assem.append('}');
}
// replace &, _
assem = assem.toString();
assem = assem.replace(/\&/g, '\\&');
assem = assem.replace(/\_/g, '\\_'); // this breaks latex math mode: $\sum_i^j$ becomes $\sum\_i^j$
return assem;
} // end getLineLatex
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(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
function processNextChars(numChars)
{
if (numChars <= 0)
{
return;
}
var iter = Changeset.opIterator(Changeset.subattribution(attribs, idx, idx + numChars));
idx += numChars;
// this iterates over every op string and decides which tags to open or to close
// based on the attribs used
while (iter.hasNext())
{
var o = iter.next();
var usedAttribs = [];
// mark all attribs as used
Changeset.eachAttribNumber(o.attribs, function (a)
{
if (a in anumMap)
{
usedAttribs.push(anumMap[a]); // i = 0 => bold, etc.
}
});
var outermostTag = -1;
// find the outer most open tag that is no longer used
for (var i = openTags.length - 1; i >= 0; i--)
{
if (usedAttribs.indexOf(openTags[i]) === -1)
{
outermostTag = i;
break;
}
}
// close all tags upto the outer most
if (outermostTag != -1)
{
while ( outermostTag >= 0 )
{
emitCloseTag(openTags[0]);
outermostTag--;
}
}
// open all tags that are used but not open
for (i=0; i < usedAttribs.length; i++)
{
if (openTags.indexOf(usedAttribs[i]) === -1)
{
emitOpenTag(usedAttribs[i])
}
}
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
// close all the tags that are open after the last op
while (openTags.length > 0)
{
emitCloseTag(openTags[0])
}
} // end processNextChars