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// the tagRangeFinder function is

// Copyright (C) 2011 by Daniel Glazman <daniel@glazman.org>

// released under the MIT license (../../LICENSE) like the rest of CodeMirror

CodeMirror.tagRangeFinder = function(cm, line) {

var nameStartChar = "A-Z_a-z\\u00C0-\\u00D6\\u00D8-\\u00F6\\u00F8-\\u02FF\\u0370-\\u037D\\u037F-\\u1FFF\\u200C-\\u200D\\u2070-\\u218F\\u2C00-\\u2FEF\\u3001-\\uD7FF\\uF900-\\uFDCF\\uFDF0-\\uFFFD";

var nameChar = nameStartChar + "\-\.0-9\\u00B7\\u0300-\\u036F\\u203F-\\u2040";

var xmlNAMERegExp = new RegExp("^[" + nameStartChar + "][" + nameChar + "]*");

var lineText = cm.getLine(line);

var found = false;

var tag = null;

var pos = 0;

while (!found) {

pos = lineText.indexOf("<", pos);

if (-1 == pos) // no tag on line

return;

if (pos + 1 < lineText.length && lineText[pos + 1] == "/") { // closing tag

pos++;

continue;

}

// ok we weem to have a start tag

if (!lineText.substr(pos + 1).match(xmlNAMERegExp)) { // not a tag name...

pos++;

continue;

}

var gtPos = lineText.indexOf(">", pos + 1);

if (-1 == gtPos) { // end of start tag not in line

var l = line + 1;

var foundGt = false;

var lastLine = cm.lineCount();

while (l < lastLine && !foundGt) {

var lt = cm.getLine(l);

var gt = lt.indexOf(">");

if (-1 != gt) { // found a >

foundGt = true;

var slash = lt.lastIndexOf("/", gt);

if (-1 != slash && slash < gt) {

var str = lineText.substr(slash, gt - slash + 1);

if (!str.match( /\/\s*\>/ )) // yep, that's the end of empty tag

return l+1;

}

}

l++;

}

found = true;

}

else {

var slashPos = lineText.lastIndexOf("/", gtPos);

if (-1 == slashPos) { // cannot be empty tag

found = true;

// don't continue

}

else { // empty tag?

// check if really empty tag

var str = lineText.substr(slashPos, gtPos - slashPos + 1);

if (!str.match( /\/\s*\>/ )) { // finally not empty

found = true;

// don't continue

}

}

}

if (found) {

var subLine = lineText.substr(pos + 1);

tag = subLine.match(xmlNAMERegExp);

if (tag) {

// we have an element name, wooohooo !

tag = tag[0];

// do we have the close tag on same line ???

if (-1 != lineText.indexOf("</" + tag + ">", pos)) // yep

{

found = false;

}

// we don't, so we have a candidate...

}

else

found = false;

}

if (!found)

pos++;

}

if (found) {

var startTag = "(\\<\\/" + tag + "\\>)|(\\<" + tag + "\\>)|(\\<" + tag + "\\s)|(\\<" + tag + "$)";

var startTagRegExp = new RegExp(startTag, "g");

var endTag = "</" + tag + ">";

var depth = 1;

var l = line + 1;

var lastLine = cm.lineCount();

while (l < lastLine) {

lineText = cm.getLine(l);

var match = lineText.match(startTagRegExp);

if (match) {

for (var i = 0; i < match.length; i++) {

if (match[i] == endTag)

depth--;

else

depth++;

if (!depth)

return l+1;

}

}

l++;

}

return;

}

};

CodeMirror.braceRangeFinder = function(cm, line) {

var lineText = cm.getLine(line);

var startChar = lineText.lastIndexOf("{");

if (startChar < 0 || lineText.lastIndexOf("}") > startChar) return;

var tokenType = cm.getTokenAt({line: line, ch: startChar}).className;

var count = 1, lastLine = cm.lineCount(), end;

outer: for (var i = line + 1; i < lastLine; ++i) {

var text = cm.getLine(i), pos = 0;

for (;;) {

var nextOpen = text.indexOf("{", pos), nextClose = text.indexOf("}", pos);

if (nextOpen < 0) nextOpen = text.length;

if (nextClose < 0) nextClose = text.length;

pos = Math.min(nextOpen, nextClose);

if (pos == text.length) break;

if (cm.getTokenAt({line: i, ch: pos + 1}).className == tokenType) {

if (pos == nextOpen) ++count;

else if (!--count) { end = i; break outer; }

}

++pos;

}

}

if (end == null || end == line + 1) return;

return end;

};

CodeMirror.indentRangeFinder = function(cm, line) {

var tabSize = cm.getOption("tabSize");

var myIndent = cm.getLineHandle(line).indentation(tabSize), last;

for (var i = line + 1, end = cm.lineCount(); i < end; ++i) {

var handle = cm.getLineHandle(i);

if (!/^\s*$/.test(handle.text)) {

if (handle.indentation(tabSize) <= myIndent) break;

last = i;

}

}

if (!last) return null;

return last + 1;

};

CodeMirror.newFoldFunction = function(rangeFinder, markText) {

var folded = [];

if (markText == null) markText = '<div style="position: absolute; left: 4px; color:#8B8B8B;">&#x25bc;</div>%N%';

function isFolded(cm, n) {

for (var i = 0; i < folded.length; ++i) {

var start = cm.lineInfo(folded[i].start);

if (!start) folded.splice(i--, 1);

else if (start.line == n) return {pos: i, region: folded[i]};

}

}

function expand(cm, region) {

cm.clearMarker(region.start);

for (var i = 0; i < region.hidden.length; ++i)

cm.showLine(region.hidden[i]);

}

return function(cm, line) {

cm.operation(function() {

var known = isFolded(cm, line);

if (known) {

folded.splice(known.pos, 1);

expand(cm, known.region);

} else {

var end = rangeFinder(cm, line);

if (end == null) return;

var hidden = [];

for (var i = line + 1; i < end; ++i) {

var handle = cm.hideLine(i);

if (handle) hidden.push(handle);

}

var first = cm.setMarker(line, markText);

var region = {start: first, hidden: hidden};

cm.onDeleteLine(first, function() { expand(cm, region); });

folded.push(region);

}

});

};

};