mediawiki-extensions-WikiEd.../modules/contentCollector.js

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// THIS FILE HAS BEEN MODIFIED for use with the mediawiki wikiEditor
// It no longer requires etherpad.collab.ace.easysync2.Changeset
// THIS FILE WAS ORIGINALLY AN APPJET MODULE: etherpad.collab.ace.contentcollector
/**
* 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 _MAX_LIST_LEVEL = 8;
function sanitizeUnicode(s) {
return s.replace(/[\uffff\ufffe\ufeff\ufdd0-\ufdef\ud800-\udfff]/g, '?');
}
function makeContentCollector( browser, domInterface ) {
browser = browser || {};
var dom = domInterface || {
isNodeText : function(n) {
return (n.nodeType == 3);
},
nodeTagName : function(n) {
return n.tagName;
},
nodeValue : function(n) {
try {
return n.nodeValue;
} catch ( err ) {
return '';
}
},
nodeName : function(n) {
return n.nodeName;
},
nodeNumChildren : function(n) {
return n.childNodes.length;
},
nodeChild : function(n, i) {
return n.childNodes.item(i);
},
nodeProp : function(n, p) {
return n[p];
},
nodeAttr : function(n, a) {
return n.getAttribute(a);
},
optNodeInnerHTML : function(n) {
return n.innerHTML;
}
};
var _blockElems = {
"div" : 1,
"p" : 1,
"pre" : 1,
"li" : 1
};
function isBlockElement(n) {
return !!_blockElems[(dom.nodeTagName(n) || "").toLowerCase()];
}
function textify(str) {
return sanitizeUnicode(str.replace(/[\n\r ]/g, ' ').replace(/\xa0/g,
' ').replace(/\t/g, ' '));
}
function getAssoc(node, name) {
return dom.nodeProp(node, "_magicdom_" + name);
}
var lines = (function() {
var textArray = [];
var self = {
length : function() {
return textArray.length;
},
atColumnZero : function() {
return textArray[textArray.length - 1] === "";
},
startNew : function() {
textArray.push("");
self.flush(true);
},
textOfLine : function(i) {
return textArray[i];
},
appendText : function(txt, attrString) {
textArray[textArray.length - 1] += txt;
// dmesg(txt+" / "+attrString);
},
textLines : function() {
return textArray.slice();
},
// call flush only when you're done
flush : function(withNewline) {
}
};
self.startNew();
return self;
}());
var cc = {};
function _ensureColumnZero(state) {
if (!lines.atColumnZero()) {
_startNewLine(state);
}
}
var selection, startPoint, endPoint;
var selStart = [ -1, -1 ], selEnd = [ -1, -1 ];
var blockElems = {
"div" : 1,
"p" : 1,
"pre" : 1
};
function _isEmpty(node, state) {
// consider clean blank lines pasted in IE to be empty
if (dom.nodeNumChildren(node) == 0)
return true;
if (dom.nodeNumChildren(node) == 1 && getAssoc(node, "shouldBeEmpty")
&& dom.optNodeInnerHTML(node) == " "
&& !getAssoc(node, "unpasted")) {
if (state) {
var child = dom.nodeChild(node, 0);
_reachPoint(child, 0, state);
_reachPoint(child, 1, state);
}
return true;
}
return false;
}
function _pointHere(charsAfter, state) {
var ln = lines.length() - 1;
var chr = lines.textOfLine(ln).length;
if (chr == 0 && state.listType && state.listType != 'none') {
chr += 1; // listMarker
}
chr += charsAfter;
return [ ln, chr ];
}
function _reachBlockPoint(nd, idx, state) {
if (!dom.isNodeText(nd))
_reachPoint(nd, idx, state);
}
function _reachPoint(nd, idx, state) {
if (startPoint && nd == startPoint.node && startPoint.index == idx) {
selStart = _pointHere(0, state);
}
if (endPoint && nd == endPoint.node && endPoint.index == idx) {
selEnd = _pointHere(0, state);
}
}
function _incrementFlag(state, flagName) {
state.flags[flagName] = (state.flags[flagName] || 0) + 1;
}
function _decrementFlag(state, flagName) {
state.flags[flagName]--;
}
function _enterList(state, listType) {
var oldListType = state.listType;
state.listLevel = (state.listLevel || 0) + 1;
if (listType != 'none') {
state.listNesting = (state.listNesting || 0) + 1;
}
state.listType = listType;
return oldListType;
}
function _exitList(state, oldListType) {
state.listLevel--;
if (state.listType != 'none') {
state.listNesting--;
}
state.listType = oldListType;
}
function _produceListMarker(state) {
}
function _startNewLine(state) {
if (state) {
var atBeginningOfLine = lines.textOfLine(lines.length() - 1).length == 0;
if (atBeginningOfLine && state.listType && state.listType != 'none') {
_produceListMarker(state);
}
}
lines.startNew();
}
cc.notifySelection = function(sel) {
if (sel) {
selection = sel;
startPoint = selection.startPoint;
endPoint = selection.endPoint;
}
};
cc.collectContent = function(node, state) {
if (!state) {
state = {
flags : {/* name -> nesting counter */}
};
}
var isBlock = isBlockElement(node);
var isEmpty = _isEmpty(node, state);
if (isBlock)
_ensureColumnZero(state);
var startLine = lines.length() - 1;
_reachBlockPoint(node, 0, state);
if (dom.isNodeText(node)) {
var txt = dom.nodeValue(node);
var rest = '';
var x = 0; // offset into original text
if (txt.length == 0) {
if (startPoint && node == startPoint.node) {
selStart = _pointHere(0, state);
}
if (endPoint && node == endPoint.node) {
selEnd = _pointHere(0, state);
}
}
while (txt.length > 0) {
var consumed = 0;
if (!browser.firefox || state.flags.preMode) {
var firstLine = txt.split('\n', 1)[0];
consumed = firstLine.length + 1;
rest = txt.substring(consumed);
txt = firstLine;
} else { /* will only run this loop body once */
}
if (startPoint && node == startPoint.node
&& startPoint.index - x <= txt.length) {
selStart = _pointHere(startPoint.index - x, state);
}
if (endPoint && node == endPoint.node
&& endPoint.index - x <= txt.length) {
selEnd = _pointHere(endPoint.index - x, state);
}
var txt2 = txt;
if ((!state.flags.preMode) && /^[\r\n]*$/.exec(txt)) {
// prevents textnodes containing just "\n" from being
// significant
// in safari when pasting text, now that we convert them to
// spaces instead of removing them, because in other cases
// removing "\n" from pasted HTML will collapse words
// together.
txt2 = "";
}
var atBeginningOfLine = lines.textOfLine(lines.length() - 1).length == 0;
if (atBeginningOfLine) {
// newlines in the source mustn't become spaces at beginning
// of line box
txt2 = txt2.replace(/^\n*/, '');
}
if (atBeginningOfLine && state.listType
&& state.listType != 'none') {
_produceListMarker(state);
}
lines.appendText(textify(txt2));
x += consumed;
txt = rest;
if (txt.length > 0) {
_startNewLine(state);
}
}
} else {
var cls = dom.nodeProp(node, "className");
var tname = (dom.nodeTagName(node) || "").toLowerCase();
if (tname == "br") {
_startNewLine(state);
} else if (tname == "script" || tname == "style") {
// ignore
} else if (!isEmpty) {
var styl = dom.nodeAttr(node, "style");
var isPre = (tname == "pre");
if ((!isPre) && browser.safari) {
isPre = (styl && /\bwhite-space:\s*pre\b/i.exec(styl));
}
if (isPre)
_incrementFlag(state, 'preMode');
var oldListTypeOrNull = null;
var nc = dom.nodeNumChildren(node);
for ( var i = 0; i < nc; i++) {
var c = dom.nodeChild(node, i);
//very specific IE case where it inserts <span lang="en"> which we want to ginore.
//to reproduce copy content from wordpad andpaste into the middle of a line in IE
if ( browser.msie && cls.indexOf('wikiEditor') >= 0 && dom.nodeName(c) == 'SPAN' && dom.nodeAttr(c, 'lang') == "" ) {
continue;
}
cc.collectContent(c, state);
}
if (isPre)
_decrementFlag(state, 'preMode');
if (oldListTypeOrNull) {
_exitList(state, oldListTypeOrNull);
}
}
}
if (!browser.msie) {
_reachBlockPoint(node, 1, state);
}
if (isBlock) {
if (lines.length() - 1 == startLine) {
_startNewLine(state);
} else {
_ensureColumnZero(state);
}
}
if (browser.msie) {
// in IE, a point immediately after a DIV appears on the next line
//_reachBlockPoint(node, 1, state);
}
};
// can pass a falsy value for end of doc
cc.notifyNextNode = function(node) {
// an "empty block" won't end a line; this addresses an issue in IE with
// typing into a blank line at the end of the document. typed text
// goes into the body, and the empty line div still looks clean.
// it is incorporated as dirty by the rule that a dirty region has
// to end a line.
if ((!node) || (isBlockElement(node) && !_isEmpty(node))) {
_ensureColumnZero(null);
}
};
// each returns [line, char] or [-1,-1]
var getSelectionStart = function() {
return selStart;
};
var getSelectionEnd = function() {
return selEnd;
};
// returns array of strings for lines found, last entry will be "" if
// last line is complete (i.e. if a following span should be on a new line).
// can be called at any point
cc.getLines = function() {
return lines.textLines();
};
// cc.applyHints = function(hints) {
// if (hints.pastedLines) {
//
// }
// }
cc.finish = function() {
lines.flush();
var lineStrings = cc.getLines();
if ( lineStrings.length > 0 && !lineStrings[lineStrings.length - 1] ) {
lineStrings.length--;
}
var ss = getSelectionStart();
var se = getSelectionEnd();
function fixLongLines() {
// design mode does not deal with with really long lines!
var lineLimit = 2000; // chars
var buffer = 10; // chars allowed over before wrapping
var linesWrapped = 0;
var numLinesAfter = 0;
for ( var i = lineStrings.length - 1; i >= 0; i--) {
var oldString = lineStrings[i];
if (oldString.length > lineLimit + buffer) {
var newStrings = [];
while (oldString.length > lineLimit) {
// var semiloc = oldString.lastIndexOf(';',
// lineLimit-1);
// var lengthToTake = (semiloc >= 0 ? (semiloc+1) :
// lineLimit);
lengthToTake = lineLimit;
newStrings.push(oldString.substring(0, lengthToTake));
oldString = oldString.substring(lengthToTake);
}
if (oldString.length > 0) {
newStrings.push(oldString);
}
function fixLineNumber(lineChar) {
if (lineChar[0] < 0)
return;
var n = lineChar[0];
var c = lineChar[1];
if (n > i) {
n += (newStrings.length - 1);
} else if (n == i) {
var a = 0;
while (c > newStrings[a].length) {
c -= newStrings[a].length;
a++;
}
n += a;
}
lineChar[0] = n;
lineChar[1] = c;
}
fixLineNumber(ss);
fixLineNumber(se);
linesWrapped++;
numLinesAfter += newStrings.length;
newStrings.unshift(i, 1);
lineStrings.splice.apply(lineStrings, newStrings);
}
}
return {
linesWrapped : linesWrapped,
numLinesAfter : numLinesAfter
};
}
var wrapData = fixLongLines();
return {
selStart : ss,
selEnd : se,
linesWrapped : wrapData.linesWrapped,
numLinesAfter : wrapData.numLinesAfter,
lines : lineStrings
};
};
return cc;
}