Changeset - 21fdc69bd446
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Christian Oyarzun - 11 years ago 2015-01-23 20:34:17
oyarzun@gmail.com
mergely: update Mergely to v3.3.9 (Issue #83)
2 files changed with 185 insertions and 109 deletions:
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LICENSE.md
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@@ -71,49 +71,49 @@ It is Copyright 2013 jQuery Foundation a
 
[MIT-permissive license](MIT-Permissive-License.txt).
 

	
 

	
 

	
 
Mousetrap
 
---------
 

	
 
Kallithea incorporates parts of the Javascript system called
 
[Mousetrap](http://craig.is/killing/mice/), which is:
 

	
 
   Copyright 2013 Craig Campbell
 

	
 
and licensed under
 
[the Apache License 2.0](http://www.apache.org/licenses/LICENSE-2.0.html).
 

	
 
A [copy of the Apache License 2.0](Apache-License-2.0.txt) is also included
 
in this distribution.
 

	
 

	
 

	
 
Mergely
 
-------
 

	
 
Kallithea incorporates some code from the Javascript system called
 
[Mergely](http://http://www.mergely.com/).
 
[Mergely](http://http://www.mergely.com/), version 3.3.9.
 
[Mergely's license](http://www.mergely.com/license.php), a
 
[copy of which is included in this repository](LICENSE-MERGELY.html),
 
is (GPL|LGPL|MPL).  Kallithea as GPLv3'd project chooses the GPL arm of that
 
tri-license.
 

	
 

	
 

	
 
Select2
 
-------
 

	
 
Kallithea incorporates parts of the Javascript system called
 
[Select2](http://ivaynberg.github.io/select2/), which is:
 

	
 
Copyright 2012 Igor Vaynberg (and probably others)
 

	
 
and is licensed [under the following license](https://github.com/ivaynberg/select2/blob/master/LICENSE):
 

	
 
> This software is licensed under the Apache License, Version 2.0 (the
 
> "Apache License") or the GNU General Public License version 2 (the "GPL
 
> License"). You may choose either license to govern your use of this
 
> software only upon the condition that you accept all of the terms of either
 
> the Apache License or the GPL License.
 

	
 
A [copy of the Apache License 2.0](Apache-License-2.0.txt) is also included
kallithea/public/js/mergely.js
Show inline comments
 
/**
 
 * Copyright (c) 2013 by Jamie Peabody, http://www.mergely.com
 
 * Copyright (c) 2012-2015 by Jamie Peabody, http://www.mergely.com
 
 * All rights reserved.
 
 * Version: 3.3.4 2013-11-02
 
 * Version: 3.3.9 2014-12-07
 
 *
 
 * NOTE by bkuhn@sfconservancy.org for Kallithea:
 
 * Mergely license appears at http://www.mergely.com/license.php and in LICENSE-MERGELY.html
 
 */
 
Mgly = {};
 

	
 
"use strict"; 
 

	
 
(function( window, document, jQuery, CodeMirror ){
 

	
 
var Mgly = {};
 

	
 
Mgly.Timer = function(){
 
	var self = this;
 
	self.start = function() { self.t0 = new Date().getTime(); }
 
	self.start = function() { self.t0 = new Date().getTime(); };
 
	self.stop = function() {
 
		var t1 = new Date().getTime();
 
		var d = t1 - self.t0; 
 
		self.t0 = t1;
 
		return d;
 
	}
 
	};
 
	self.start();
 
}
 
};
 

	
 
Mgly.ChangeExpression = new RegExp(/(\d+(?:,\d+)?)([acd])(\d+(?:,\d+)?)/);
 
Mgly.ChangeExpression = new RegExp(/(^(?![><\-])*\d+(?:,\d+)?)([acd])(\d+(?:,\d+)?)/);
 

	
 
Mgly.DiffParser = function(diff) {
 
	var changes = [];
 
	var change_id = 0;
 
	// parse diff
 
	var diff_lines = diff.split(/\n/);
 
	for (var i = 0; i < diff_lines.length; ++i) {
 
		if (diff_lines[i].length == 0) continue;
 
		var change = {};
 
		var test = Mgly.ChangeExpression.exec(diff_lines[i]);
 
		if (test == null) continue;
 
		// lines are zero-based
 
		var fr = test[1].split(',');
 
		change['lhs-line-from'] = fr[0] - 1;
 
		if (fr.length == 1) change['lhs-line-to'] = fr[0] - 1;
 
		else change['lhs-line-to'] = fr[1] - 1;
 
		var to = test[3].split(',');
 
		change['rhs-line-from'] = to[0] - 1;
 
		if (to.length == 1) change['rhs-line-to'] = to[0] - 1;
 
		else change['rhs-line-to'] = to[1] - 1;
 
		change['op'] = test[2];
 
		changes[change_id++] = change;
 
	}
 
	return changes;
 
}
 
};
 

	
 
Mgly.sizeOf = function(obj) {
 
	var size = 0, key;
 
	for (key in obj) {
 
		if (obj.hasOwnProperty(key)) size++;
 
	}
 
	return size;
 
}
 
};
 

	
 
Mgly.LCS = function(x, y) {
 
	this.x = x.replace(/[ ]{1}/g, '\n');
 
	this.y = y.replace(/[ ]{1}/g, '\n');
 
}
 
};
 

	
 
jQuery.extend(Mgly.LCS.prototype, {
 
	clear: function() { this.ready = 0; },
 
	diff: function(added, removed) {
 
		var d = new Mgly.diff(this.x, this.y, {ignorews: false});
 
		var changes = Mgly.DiffParser(d.normal_form());
 
		var li = 0, lj = 0;
 
		for (var i = 0; i < changes.length; ++i) {
 
			var change = changes[i];
 
			if (change.op != 'a') {
 
				// find the starting index of the line
 
				li = d.getLines('lhs').slice(0, change['lhs-line-from']).join(' ').length;
 
				// get the index of the the span of the change
 
				lj = change['lhs-line-to'] + 1;
 
				// get the changed text
 
				var lchange = d.getLines('lhs').slice(change['lhs-line-from'], lj).join(' ');
 
				if (change.op == 'd') lchange += ' ';// include the leading space
 
				else if (li > 0 && change.op == 'c') li += 1; // ignore leading space if not first word
 
				// output the changed index and text
 
				removed(li, li + lchange.length);
 
			}
 
			if (change.op != 'd') {
 
				// find the starting index of the line
 
				li = d.getLines('lhs').slice(0, change['rhs-line-from']).join(' ').length;
 
				li = d.getLines('rhs').slice(0, change['rhs-line-from']).join(' ').length;
 
				// get the index of the the span of the change
 
				lj = change['rhs-line-to'] + 1;
 
				// get the changed text
 
				var rchange = d.getLines('lhs').slice(change['rhs-line-from'], lj).join(' ');
 
				var rchange = d.getLines('rhs').slice(change['rhs-line-from'], lj).join(' ');
 
				if (change.op == 'a') rchange += ' ';// include the leading space
 
				else if (li > 0 && change.op == 'c') li += 1; // ignore leading space if not first word
 
				// output the changed index and text
 
				added(li, li + rchange.length);
 
			}
 
		}
 
	}
 
});
 

	
 
Mgly.CodeifyText = function(settings) {
 
    this._max_code = 0;
 
    this._diff_codes = {};
 
	this.ctxs = {};
 
	this.options = {ignorews: false};
 
	jQuery.extend(this, settings);
 
	this.lhs = settings.lhs.split('\n');
 
	this.rhs = settings.rhs.split('\n');
 
}
 
};
 

	
 
jQuery.extend(Mgly.CodeifyText.prototype, {
 
	getCodes: function(side) {
 
		if (!this.ctxs.hasOwnProperty(side)) {
 
			var ctx = this._diff_ctx(this[side]);
 
			this.ctxs[side] = ctx;
 
			ctx.codes.length = Object.keys(ctx.codes).length;
 
		}
 
		return this.ctxs[side].codes;
 
	},
 
	getLines: function(side) {
 
		return this.ctxs[side].lines;
 
	},
 
	_diff_ctx: function(lines) {
 
		var ctx = {i: 0, codes: {}, lines: lines};
 
		this._codeify(lines, ctx);
 
		return ctx;
 
	},
 
	_codeify: function(lines, ctx) {
 
		var code = this._max_code;
 
		for (var i = 0; i < lines.length; ++i) {
 
			var line = lines[i];
 
			if (this.options.ignorews) {
 
				line = line.replace(/\s+/g, '');
 
@@ -137,160 +143,162 @@ jQuery.extend(Mgly.CodeifyText.prototype
 
				this._max_code++;
 
				this._diff_codes[line] = this._max_code;
 
				ctx.codes[i] = this._max_code;
 
			}
 
		}
 
	}
 
});
 

	
 
Mgly.diff = function(lhs, rhs, options) {
 
	var opts = jQuery.extend({ignorews: false}, options);
 
	this.codeify = new Mgly.CodeifyText({
 
		lhs: lhs,
 
		rhs: rhs,
 
		options: opts
 
	});
 
	var lhs_ctx = {
 
		codes: this.codeify.getCodes('lhs'),
 
		modified: {}
 
	};
 
	var rhs_ctx = {
 
		codes: this.codeify.getCodes('rhs'),
 
		modified: {}
 
	};
 
	var max = (lhs_ctx.codes.length + rhs_ctx.codes.length + 1);
 
	var vector_d = Array( 2 * max + 2 );
 
	var vector_u = Array( 2 * max + 2 );
 
	var vector_d = [];
 
	var vector_u = [];
 
	this._lcs(lhs_ctx, 0, lhs_ctx.codes.length, rhs_ctx, 0, rhs_ctx.codes.length, vector_u, vector_d);
 
	this._optimize(lhs_ctx);
 
	this._optimize(rhs_ctx);
 
	this.items = this._create_diffs(lhs_ctx, rhs_ctx);
 
};
 

	
 
jQuery.extend(Mgly.diff.prototype, {
 
	changes: function() { return this.items; },
 
	getLines: function(side) {
 
		return this.codeify.getLines(side);
 
	},
 
	normal_form: function() {
 
		var nf = '';
 
		for (var index = 0; index < this.items.length; ++index) {
 
			var item = this.items[index];
 
			var lhs_str = '';
 
			var rhs_str = '';
 
			var change = 'c';
 
			if (item.lhs_deleted_count == 0 && item.rhs_inserted_count > 0) change = 'a';
 
			else if (item.lhs_deleted_count > 0 && item.rhs_inserted_count == 0) change = 'd';
 
			
 
			if (item.lhs_deleted_count == 1) lhs_str = item.lhs_start + 1;
 
			else if (item.lhs_deleted_count == 0) lhs_str = item.lhs_start;
 
			else lhs_str = (item.lhs_start + 1) + ',' + (item.lhs_start + item.lhs_deleted_count);
 
			
 
			if (item.rhs_inserted_count == 1) rhs_str = item.rhs_start + 1;
 
			else if (item.rhs_inserted_count == 0) rhs_str = item.rhs_start;
 
			else rhs_str = (item.rhs_start + 1) + ',' + (item.rhs_start + item.rhs_inserted_count);
 
			nf += lhs_str + change + rhs_str + '\n';
 
			if (this.rhs_lines && this.lhs_lines) {
 

	
 
			var lhs_lines = this.getLines('lhs');
 
			var rhs_lines = this.getLines('rhs');
 
			if (rhs_lines && lhs_lines) {
 
				var i;
 
				// if rhs/lhs lines have been retained, output contextual diff
 
				for (var i = item.lhs_start; i < item.lhs_start + item.lhs_deleted_count; ++i) {
 
					nf += '< ' + this.lhs_lines[i] + '\n';
 
				for (i = item.lhs_start; i < item.lhs_start + item.lhs_deleted_count; ++i) {
 
					nf += '< ' + lhs_lines[i] + '\n';
 
				}
 
				if (item.rhs_inserted_count && item.lhs_deleted_count) nf += '---\n';
 
				for (var i = item.rhs_start; i < item.rhs_start + item.rhs_inserted_count; ++i) {
 
					nf += '> ' + this.rhs_lines[i] + '\n';
 
				for (i = item.rhs_start; i < item.rhs_start + item.rhs_inserted_count; ++i) {
 
					nf += '> ' + rhs_lines[i] + '\n';
 
				}
 
			}
 
		}
 
		return nf;
 
	},
 
	_lcs: function(lhs_ctx, lhs_lower, lhs_upper, rhs_ctx, rhs_lower, rhs_upper, vector_u, vector_d) {
 
		while ( (lhs_lower < lhs_upper) && (rhs_lower < rhs_upper) && (lhs_ctx.codes[lhs_lower] == rhs_ctx.codes[rhs_lower]) ) {
 
			++lhs_lower;
 
			++rhs_lower;
 
		}
 
		while ( (lhs_lower < lhs_upper) && (rhs_lower < rhs_upper) && (lhs_ctx.codes[lhs_upper - 1] == rhs_ctx.codes[rhs_upper - 1]) ) {
 
			--lhs_upper;
 
			--rhs_upper;
 
		}
 
		if (lhs_lower == lhs_upper) {
 
			while (rhs_lower < rhs_upper) {
 
				rhs_ctx.modified[ rhs_lower++ ] = true;
 
			}
 
		}
 
		else if (rhs_lower == rhs_upper) {
 
			while (lhs_lower < lhs_upper) {
 
				lhs_ctx.modified[ lhs_lower++ ] = true;
 
			}
 
		}
 
		else {
 
			var sms = this._sms(lhs_ctx, lhs_lower, lhs_upper, rhs_ctx, rhs_lower, rhs_upper, vector_u, vector_d);
 
			this._lcs(lhs_ctx, lhs_lower, sms.x, rhs_ctx, rhs_lower, sms.y, vector_u, vector_d);
 
			this._lcs(lhs_ctx, sms.x, lhs_upper, rhs_ctx, sms.y, rhs_upper, vector_u, vector_d);
 
		}
 
	},
 
	_sms: function(lhs_ctx, lhs_lower, lhs_upper, rhs_ctx, rhs_lower, rhs_upper, vector_u, vector_d) {
 
		var max = lhs_ctx.codes.length + rhs_ctx.codes.length + 1;
 
		var kdown = lhs_lower - rhs_lower;
 
		var kup = lhs_upper - rhs_upper;
 
		var delta = (lhs_upper - lhs_lower) - (rhs_upper - rhs_lower);
 
		var odd = (delta & 1) != 0;
 
		var offset_down = max - kdown;
 
		var offset_up = max - kup;
 
		var maxd = ((lhs_upper - lhs_lower + rhs_upper - rhs_lower) / 2) + 1;
 
		vector_d[ offset_down + kdown + 1 ] = lhs_lower;
 
		vector_u[ offset_up + kup - 1 ] = lhs_upper;
 
		var ret = {x:0,y:0};
 
		for (var d = 0; d <= maxd; ++d) {
 
			for (var k = kdown - d; k <= kdown + d; k += 2) {
 
				var x, y;
 
		var ret = {x:0,y:0}, d, k, x, y;
 
		for (d = 0; d <= maxd; ++d) {
 
			for (k = kdown - d; k <= kdown + d; k += 2) {
 
				if (k == kdown - d) {
 
					x = vector_d[ offset_down + k + 1 ];//down
 
				}
 
				else {
 
					x = vector_d[ offset_down + k - 1 ] + 1;//right
 
					if ((k < (kdown + d)) && (vector_d[ offset_down + k + 1 ] >= x)) {
 
						x = vector_d[ offset_down + k + 1 ];//down
 
					}
 
				}
 
				y = x - k;
 
				// find the end of the furthest reaching forward D-path in diagonal k.
 
				while ((x < lhs_upper) && (y < rhs_upper) && (lhs_ctx.codes[x] == rhs_ctx.codes[y])) {
 
					x++; y++;
 
				}
 
				vector_d[ offset_down + k ] = x;
 
				// overlap ?
 
				if (odd && (kup - d < k) && (k < kup + d)) {
 
					if (vector_u[offset_up + k] <= vector_d[offset_down + k]) {
 
						ret.x = vector_d[offset_down + k];
 
						ret.y = vector_d[offset_down + k] - k;
 
						return (ret);
 
					}
 
				}
 
			}
 
			// Extend the reverse path.
 
			for (var k = kup - d; k <= kup + d; k += 2) {
 
			for (k = kup - d; k <= kup + d; k += 2) {
 
				// find the only or better starting point
 
				var x, y;
 
				if (k == kup + d) {
 
					x = vector_u[offset_up + k - 1]; // up
 
				} else {
 
					x = vector_u[offset_up + k + 1] - 1; // left
 
					if ((k > kup - d) && (vector_u[offset_up + k - 1] < x))
 
						x = vector_u[offset_up + k - 1]; // up
 
				}
 
				y = x - k;
 
				while ((x > lhs_lower) && (y > rhs_lower) && (lhs_ctx.codes[x - 1] == rhs_ctx.codes[y - 1])) {
 
					// diagonal
 
					x--;
 
					y--;
 
				}
 
				vector_u[offset_up + k] = x;
 
				// overlap ?
 
				if (!odd && (kdown - d <= k) && (k <= kdown + d)) {
 
					if (vector_u[offset_up + k] <= vector_d[offset_down + k]) {
 
						ret.x = vector_d[offset_down + k];
 
						ret.y = vector_d[offset_down + k] - k;
 
						return (ret);
 
					}
 
				}
 
			}
 
		}
 
@@ -370,181 +378,206 @@ jQuery.extend(Mgly.mergely.prototype, {
 
		this.diffView.bind(el);
 
	}
 
});
 

	
 
Mgly.CodeMirrorDiffView = function(el, options) {
 
	CodeMirror.defineExtension('centerOnCursor', function() {
 
		var coords = this.cursorCoords(null, 'local');
 
		this.scrollTo(null, 
 
			(coords.y + coords.yBot) / 2 - (this.getScrollerElement().clientHeight / 2));
 
	});
 
	this.init(el, options);
 
};
 

	
 
jQuery.extend(Mgly.CodeMirrorDiffView.prototype, {
 
	init: function(el, options) {
 
		this.settings = {
 
			autoupdate: true,
 
			autoresize: true,
 
			rhs_margin: 'right',
 
			lcs: true,
 
			sidebar: true,
 
			viewport: false,
 
			ignorews: false,
 
			fadein: 'fast',
 
			editor_width: '400px',
 
			editor_width: '650px',
 
			editor_height: '400px',
 
			resize_timeout: 500,
 
			change_timeout: 150,
 
			fgcolor: {a:'#4ba3fa',c:'#a3a3a3',d:'#ff7f7f'},
 
			fgcolor: {a:'#4ba3fa',c:'#a3a3a3',d:'#ff7f7f',  // color for differences (soft color)
 
				ca:'#4b73ff',cc:'#434343',cd:'#ff4f4f'},    // color for currently active difference (bright color)
 
			bgcolor: '#eee',
 
			vpcolor: 'rgba(0, 0, 200, 0.5)',
 
			lhs: function(setValue) { },
 
			rhs: function(setValue) { },
 
			loaded: function() { },
 
			//_auto_height: function(h) { return h - 20; },
 
			_auto_width: function(w) { return w; },
 
			resize: function(init) {
 
				var scrollbar = init ? 16 : 0;
 
				var w = jQuery(el).parent().width() + scrollbar;
 
				var w = jQuery(el).parent().width() + scrollbar, h = 0;
 
				if (this.width == 'auto') {
 
					w = this._auto_width(w);
 
				}
 
				else {
 
					w = this.width;
 
					this.editor_width = w;
 
				}
 
				if (this.height == 'auto') {
 
					//h = this._auto_height(h);
 
					h = jQuery(el).parent().height();
 
				}
 
				else {
 
					h = this.height;
 
					this.editor_height = h;
 
				}
 
				var content_width = w / 2.0 - 2 * 8 - 8;
 
				var content_height = h;
 
				var self = jQuery(el);
 
				self.find('.mergely-column').css({ width: content_width + 'px' });
 
				self.find('.mergely-column, .mergely-canvas, .mergely-margin, .mergely-column textarea, .CodeMirror-scroll, .cm-s-default').css({ height: content_height + 'px' });
 
				self.find('.mergely-canvas').css({ height: content_height + 'px' });
 
				self.find('.mergely-column textarea').css({ width: content_width + 'px' });
 
				self.css({ width: w, height: h, clear: 'both' });
 
				if (self.css('display') == 'none') {
 
					if (this.fadein != false) self.fadeIn(this.fadein);
 
					else self.show();
 
					if (this.loaded) this.loaded();
 
				}
 
				if (this.resized) this.resized();
 
			},
 
			_debug: '', //scroll,draw,calc,diff,markup,change
 
			resized: function() { }
 
		};
 
		var cmsettings = {
 
			mode: 'text/plain',
 
			readOnly: false,
 
			lineWrapping: false,
 
			lineNumbers: true,
 
			gutters: ['merge', 'CodeMirror-linenumbers']
 
		}
 
		};
 
		this.lhs_cmsettings = {};
 
		this.rhs_cmsettings = {};
 
		
 
		// save this element for faster queries
 
		this.element = jQuery(el);
 
		
 
		// save options if there are any
 
		if (options && options.cmsettings) jQuery.extend(this.lhs_cmsettings, cmsettings, options.cmsettings, options.lhs_cmsettings);
 
		if (options && options.cmsettings) jQuery.extend(this.rhs_cmsettings, cmsettings, options.cmsettings, options.rhs_cmsettings);
 
		if (options) jQuery.extend(this.settings, options);
 
		//if (options) jQuery.extend(this.settings, options);
 
		
 
		// bind if the element is destroyed
 
		this.element.bind('destroyed', jQuery.proxy(this.teardown, this));
 

	
 
		// save this instance in jQuery data, binding this view to the node
 
		jQuery.data(el, 'mergely', this);
 

	
 
		this._setOptions(options);
 
	},
 
	unbind: function() {
 
		if (this.changed_timeout != null) clearTimeout(this.changed_timeout);
 
		this.editor[this.id + '-lhs'].toTextArea();
 
		this.editor[this.id + '-rhs'].toTextArea();
 
	},
 
	destroy: function() {
 
		this.element.unbind('destroyed', this.teardown);
 
		this.teardown();
 
	},
 
	teardown: function() {
 
		this.unbind();
 
	},
 
	lhs: function(text) {
 
		this.editor[this.id + '-lhs'].setValue(text);
 
	},
 
	rhs: function(text) {
 
		this.editor[this.id + '-rhs'].setValue(text);
 
	},
 
	update: function() {
 
		this._changing(this.id + '-lhs', this.id + '-rhs');
 
	},
 
	unmarkup: function() {
 
		this._clear();
 
	},
 
	scrollToDiff: function(direction) {
 
		if (!this.changes.length) return;
 
		if (direction == 'next') {
 
			this._current_diff = Math.min(++this._current_diff, this.changes.length - 1);
 
		}
 
		else {
 
			this._current_diff = Math.max(--this._current_diff, 0);
 
		}
 
		this._scroll_to_change(this.changes[this._current_diff]);
 
		this._changed(this.id + '-lhs', this.id + '-rhs');
 
	},
 
	mergeCurrentChange: function(side) {
 
		if (!this.changes.length) return;
 
		if (side == 'lhs' && !this.lhs_cmsettings.readOnly) {
 
			this._merge_change(this.changes[this._current_diff], 'rhs', 'lhs');
 
		}
 
		else if (side == 'rhs' && !this.rhs_cmsettings.readOnly) {
 
			this._merge_change(this.changes[this._current_diff], 'lhs', 'rhs');
 
		}
 
	},
 
	scrollTo: function(side, num) {
 
		var le = this.editor[this.id + '-lhs'];
 
		var re = this.editor[this.id + '-rhs'];
 
		if (side == 'lhs') {
 
			le.setCursor(num);
 
			le.centerOnCursor();
 
		}
 
		else {
 
			re.setCursor(num);
 
			re.centerOnCursor();
 
		}
 
	},
 
	options: function(opts) {
 
		if (opts) {
 
	_setOptions: function(opts) {
 
			jQuery.extend(this.settings, opts);
 
			if (this.settings.autoresize) this.resize();
 
			if (this.settings.autoupdate) this.update();
 
			if (this.settings.hasOwnProperty('rhs_margin')) {
 
				// dynamically swap the margin
 
				if (this.settings.rhs_margin == 'left') {
 
					this.element.find('.mergely-margin:last-child').insertAfter(
 
						this.element.find('.mergely-canvas'));
 
				}
 
				else {
 
					var target = this.element.find('.mergely-margin').last();
 
					target.appendTo(target.parent());
 
				}
 
			}
 
			if (this.settings.hasOwnProperty('sidebar')) {
 
				// dynamically enable sidebars
 
				if (this.settings.sidebar) {
 
					jQuery(this.element).find('.mergely-margin').css({display: 'block'});
 
				}
 
				else {
 
					jQuery(this.element).find('.mergely-margin').css({display: 'none'});
 
				}
 
			}
 
	},
 
	options: function(opts) {
 
		if (opts) {
 
			this._setOptions(opts);
 
			if (this.settings.autoresize) this.resize();
 
			if (this.settings.autoupdate) this.update();
 
		}
 
		else {
 
			return this.settings;
 
		}
 
	},
 
	swap: function() {
 
		if (this.lhs_cmsettings.readOnly || this.rhs_cmsettings.readOnly) return;
 
		var le = this.editor[this.id + '-lhs'];
 
		var re = this.editor[this.id + '-rhs'];
 
		var tmp = re.getValue();
 
		re.setValue(le.getValue());
 
		le.setValue(tmp);
 
	},
 
	merge: function(side) {
 
		var le = this.editor[this.id + '-lhs'];
 
		var re = this.editor[this.id + '-rhs'];
 
		if (side == 'lhs' && !this.lhs_cmsettings.readOnly) le.setValue(re.getValue());
 
		else if (!this.rhs_cmsettings.readOnly) re.setValue(le.getValue());
 
	},
 
	get: function(side) {
 
		var ed = this.editor[this.id + '-' + side];
 
		var t = ed.getValue();
 
		if (t == undefined) return '';
 
		return t;
 
@@ -569,151 +602,177 @@ jQuery.extend(Mgly.CodeMirrorDiffView.pr
 
			this.cursor[this.id] = editor.getSearchCursor(query, { line: 0, ch: 0 }, false);
 
			this.prev_query[side] = query;
 
		}
 
		var cursor = this.cursor[this.id];
 
		
 
		if (cursor[direction]()) {
 
			editor.setSelection(cursor.from(), cursor.to());
 
		}
 
		else {
 
			cursor = editor.getSearchCursor(query, { line: 0, ch: 0 }, false);
 
		}
 
	},
 
	resize: function() {
 
		this.settings.resize();
 
		this._changing(this.id + '-lhs', this.id + '-rhs');
 
		this._set_top_offset(this.id + '-lhs');
 
	},
 
	diff: function() {
 
		var lhs = this.editor[this.id + '-lhs'].getValue();
 
		var rhs = this.editor[this.id + '-rhs'].getValue();
 
		var d = new Mgly.diff(lhs, rhs, this.settings);
 
		return d.normal_form();
 
	},
 
	bind: function(el) {
 
		jQuery(this.element).hide();//hide
 
		this.element.hide();//hide
 
		this.id = jQuery(el).attr('id');
 
		var height = this.settings.editor_height;
 
		var width = this.settings.editor_width;
 
		this.changed_timeout = null;
 
		this.chfns = {};
 
		this.chfns[this.id + '-lhs'] = [];
 
		this.chfns[this.id + '-rhs'] = [];
 
		this.prev_query = [];
 
		this.cursor = [];
 
		this._skipscroll = {};
 
		this.change_exp = new RegExp(/(\d+(?:,\d+)?)([acd])(\d+(?:,\d+)?)/);
 
		var merge_lhs_button;
 
		var merge_rhs_button;
 
		if (jQuery.button != undefined) {
 
			//jquery ui
 
			merge_lhs_button = '<button title="Merge left"></button>';
 
			merge_rhs_button = '<button title="Merge right"></button>';
 
		}
 
		else {
 
			// homebrew
 
			var style = 'opacity:0.4;width:10px;height:15px;background-color:#888;cursor:pointer;text-align:center;color:#eee;border:1px solid: #222;margin-right:5px;';
 
			var style = 'opacity:0.4;width:10px;height:15px;background-color:#888;cursor:pointer;text-align:center;color:#eee;border:1px solid: #222;margin-right:5px;margin-top: -2px;';
 
			merge_lhs_button = '<div style="' + style + '" title="Merge left">&lt;</div>';
 
			merge_rhs_button = '<div style="' + style + '" title="Merge right">&gt;</div>';
 
		}
 
		this.merge_rhs_button = jQuery(merge_rhs_button);
 
		this.merge_lhs_button = jQuery(merge_lhs_button);
 
		
 
		// create the textarea and canvas elements
 
		jQuery(this.element).append(jQuery('<div class="mergely-margin" style="height: ' + height + '"><canvas id="' + this.id + '-lhs-margin" width="8px" height="' + height + '"></canvas></div>'));
 
		jQuery(this.element).append(jQuery('<div style="position:relative;width:' + width + '; height:' + height + '" id="' + this.id + '-editor-lhs" class="mergely-column"><textarea style="" id="' + this.id + '-lhs"></textarea></div>'));
 
		jQuery(this.element).append(jQuery('<div class="mergely-canvas" style="height: ' + height + '"><canvas id="' + this.id + '-lhs-' + this.id + '-rhs-canvas" style="width:28px" width="28px" height="' + height + '"></canvas></div>'));
 
		var height = this.settings.editor_height;
 
		var width = this.settings.editor_width;
 
		this.element.append(jQuery('<div class="mergely-margin" style="height: ' + height + '"><canvas id="' + this.id + '-lhs-margin" width="8px" height="' + height + '"></canvas></div>'));
 
		this.element.append(jQuery('<div style="position:relative;width:' + width + '; height:' + height + '" id="' + this.id + '-editor-lhs" class="mergely-column"><textarea style="" id="' + this.id + '-lhs"></textarea></div>'));
 
		this.element.append(jQuery('<div class="mergely-canvas" style="height: ' + height + '"><canvas id="' + this.id + '-lhs-' + this.id + '-rhs-canvas" style="width:28px" width="28px" height="' + height + '"></canvas></div>'));
 
		var rmargin = jQuery('<div class="mergely-margin" style="height: ' + height + '"><canvas id="' + this.id + '-rhs-margin" width="8px" height="' + height + '"></canvas></div>');
 
		if (!this.settings.sidebar) {
 
			jQuery(this.element).find('.mergely-margin').css({display: 'none'});
 
			this.element.find('.mergely-margin').css({display: 'none'});
 
		}
 
		if (this.settings.rhs_margin == 'left') {
 
			jQuery(this.element).append(rmargin);
 
			this.element.append(rmargin);
 
		}
 
		jQuery(this.element).append(jQuery('<div style="width:' + width + '; height:' + height + '" id="' + this.id + '-editor-rhs" class="mergely-column"><textarea style="" id="' + this.id + '-rhs"></textarea></div>'));
 
		this.element.append(jQuery('<div style="width:' + width + '; height:' + height + '" id="' + this.id + '-editor-rhs" class="mergely-column"><textarea style="" id="' + this.id + '-rhs"></textarea></div>'));
 
		if (this.settings.rhs_margin != 'left') {
 
			jQuery(this.element).append(rmargin);
 
			this.element.append(rmargin);
 
		}
 
		//codemirror
 
		var cmstyle = '#' + this.id + ' .CodeMirror-gutter-text { padding: 5px 0 0 0; }' +
 
			'#' + this.id + ' .CodeMirror-lines pre, ' + '#' + this.id + ' .CodeMirror-gutter-text pre { line-height: 18px; }' +
 
			'.CodeMirror-linewidget { overflow: hidden; };';
 
		if (this.settings.autoresize) {
 
			cmstyle += this.id + ' .CodeMirror-scroll { height: 100%; overflow: auto; }';
 
		}
 
		// adjust the margin line height
 
		cmstyle += '\n.CodeMirror { line-height: 18px; }';
 
		jQuery('<style type="text/css">' + cmstyle + '</style>').appendTo('head');
 

	
 
		//bind
 
		var rhstx = jQuery('#' + this.id + '-rhs').get(0);
 
		if (!rhstx) {
 
			console.error('rhs textarea not defined - Mergely not initialized properly');
 
			return;
 
		}
 
		var lhstx = jQuery('#' + this.id + '-lhs').get(0);
 
		if (!rhstx) {
 
			console.error('lhs textarea not defined - Mergely not initialized properly');
 
			return;
 
		}
 
		var self = this;
 
		this.editor = [];
 
		this.editor[this.id + '-lhs'] = CodeMirror.fromTextArea(lhstx, this.lhs_cmsettings);
 
		this.editor[this.id + '-rhs'] = CodeMirror.fromTextArea(rhstx, this.rhs_cmsettings);
 
		this.editor[this.id + '-lhs'].on('change', function(){ if (self.settings.autoupdate) self._changing(self.id + '-lhs', self.id + '-rhs'); });
 
		this.editor[this.id + '-lhs'].on('scroll', function(){ self._scrolling(self.id + '-lhs'); });
 
		this.editor[this.id + '-rhs'].on('change', function(){ if (self.settings.autoupdate) self._changing(self.id + '-lhs', self.id + '-rhs'); });
 
		this.editor[this.id + '-rhs'].on('scroll', function(){ self._scrolling(self.id + '-rhs'); });
 
		// resize
 
		if (this.settings.autoresize) {
 
			var sz_timeout1 = null;
 
			var sz = function(init) {
 
				//self.em_height = null; //recalculate
 
				if (self.settings.resize) self.settings.resize(init);
 
				self.editor[self.id + '-lhs'].refresh();
 
				self.editor[self.id + '-rhs'].refresh();
 
				if (self.settings.autoupdate) {
 
					self._changing(self.id + '-lhs', self.id + '-rhs');
 
				}
 
			}
 
			};
 
			jQuery(window).resize(
 
				function () {
 
					if (sz_timeout1) clearTimeout(sz_timeout1);
 
					sz_timeout1 = setTimeout(sz, self.settings.resize_timeout);
 
				}
 
			);
 
			sz(true);
 
		}
 
		//bind
 
		>
 
		var setv;
 
		if (this.settings.lhs) {
 
			var setv = this.editor[this.id + '-lhs'].getDoc().setValue;
 
			setv = this.editor[this.id + '-lhs'].getDoc().setValue;
 
			this.settings.lhs(setv.bind(this.editor[this.id + '-lhs'].getDoc()));
 
		}
 
		if (this.settings.rhs) {
 
			var setv = this.editor[this.id + '-rhs'].getDoc().setValue;
 
			setv = this.editor[this.id + '-rhs'].getDoc().setValue;
 
			this.settings.rhs(setv.bind(this.editor[this.id + '-rhs'].getDoc()));
 
		}
 
	},
 
	
 
	_scroll_to_change : function(change) {
 
		if (!change) return;
 
		var self = this;
 
		var led = self.editor[self.id+'-lhs'];
 
		var red = self.editor[self.id+'-rhs'];
 

	
 
		var yref = led.getScrollerElement().offsetHeight * 0.5; // center between >0 and 1/2
 

	
 
		// set cursors
 
		led.setCursor(Math.max(change["lhs-line-from"],0), 0); // use led.getCursor().ch ?
 
		red.setCursor(Math.max(change["rhs-line-from"],0), 0);
 

	
 
		// using directly CodeMirror breaks canvas alignment
 
		// var ly = led.charCoords({line: Math.max(change["lhs-line-from"],0), ch: 0}, "local").top;
 

	
 
		// calculate scroll offset for current change. Warning: returns relative y position so we scroll to 0 first.
 
		led.scrollTo(null, 0);
 
		red.scrollTo(null, 0);
 
		self._calculate_offsets(self.id+'-lhs', self.id+'-rhs', [change]);
 
		led.scrollTo(null, Math.max(change["lhs-y-start"]-yref, 0));
 
		red.scrollTo(null, Math.max(change["rhs-y-start"]-yref, 0));
 
		// right pane should simply follows
 
	},
 

	
 
	_scrolling: function(editor_name) {
 
		if (this._skipscroll[editor_name] === true) {
 
			// scrolling one side causes the other to event - ignore it
 
			this._skipscroll[editor_name] = false;
 
			return;
 
		}
 
		var scroller = jQuery(this.editor[editor_name].getScrollerElement());
 
		if (this.midway == undefined) {
 
			this.midway = (scroller.height() / 2.0 + scroller.offset().top).toFixed(2);
 
		}
 
		// balance-line
 
		var midline = this.editor[editor_name].coordsChar({left:0, top:this.midway});
 
		var top_to = scroller.scrollTop();
 
		var left_to = scroller.scrollLeft();
 
		
 
		this.trace('scroll', 'side', editor_name);
 
		this.trace('scroll', 'midway', this.midway);
 
		this.trace('scroll', 'midline', midline);
 
		this.trace('scroll', 'top_to', top_to);
 
		this.trace('scroll', 'left_to', left_to);
 
		
 
		var editor_name1 = this.id + '-lhs';
 
		var editor_name2 = this.id + '-rhs';
 
		
 
@@ -740,136 +799,144 @@ jQuery.extend(Mgly.CodeMirrorDiffView.pr
 
							// change outside of viewport
 
							force_scroll = true;
 
						}
 
						else {
 
							top_adjust += 
 
								(change[this_side+'-y-end'] - change[this_side+'-y-start']) - 
 
								(change[other_side+'-y-end'] - change[other_side+'-y-start']);
 
						}
 
					}
 
				}
 
			}
 
			
 
			var vp = this.editor[name].getViewport();
 
			var scroll = true;
 
			if (last_change) {
 
				this.trace('scroll', 'last change before midline', last_change);
 
				if (midline.line >= vp.from && midline <= vp.to) {
 
					scroll = false;
 
				}
 
			}
 
			this.trace('scroll', 'scroll', scroll);
 
			if (scroll || force_scroll) {
 
				// scroll the other side
 
				this.trace('scroll', 'scrolling other side', top_to - top_adjust);
 
				var scroller = jQuery(this.editor[name].getScrollerElement());
 
				this._skipscroll[name] = true;//disable next event
 
				scroller.scrollTop(top_to - top_adjust).scrollLeft(left_to);
 
				this.editor[name].scrollTo(left_to, top_to - top_adjust);
 
			}
 
			else this.trace('scroll', 'not scrolling other side');
 
			
 
			if (this.settings.autoupdate) {
 
				var timer = new Mgly.Timer();
 
				this._calculate_offsets(editor_name1, editor_name2, this.changes);
 
				this.trace('change', 'offsets time', timer.stop());
 
				this._markup_changes(editor_name1, editor_name2, this.changes);
 
				this.trace('change', 'markup time', timer.stop());
 
				this._draw_diff(editor_name1, editor_name2, this.changes);
 
				this.trace('change', 'draw time', timer.stop());
 
			}
 
			this.trace('scroll', 'scrolled');
 
		}
 
	},
 
	_changing: function(editor_name1, editor_name2) {
 
		this.trace('change', 'changing-timeout', this.changed_timeout);
 
		var self = this;
 
		if (this.changed_timeout != null) clearTimeout(this.changed_timeout);
 
		this.changed_timeout = setTimeout(function(){
 
			var timer = new Mgly.Timer();
 
			self._changed(editor_name1, editor_name2);
 
			self.trace('change', 'total time', timer.stop());
 
		}, this.settings.change_timeout);
 
	},
 
	_changed: function(editor_name1, editor_name2) {
 
		this._clear();
 
		this._diff(editor_name1, editor_name2);
 
	},
 
	_clear: function() {
 
		var self = this;
 
		for (var name in this.editor) {
 
			if (!this.editor.hasOwnProperty(name)) continue;
 
			var editor = this.editor[name];
 
			var fns = self.chfns[name];
 
			// clear editor changes
 
			editor.operation(function() {
 
				var timer = new Mgly.Timer();
 
				for (var i = 0, l = editor.lineCount(); i < l; ++i) {
 
		var self = this, name, editor, fns, timer, i, change, l;
 

	
 
		var clear_changes = function() {
 
			timer = new Mgly.Timer();
 
			for (i = 0, l = editor.lineCount(); i < l; ++i) {
 
					editor.removeLineClass(i, 'background');
 
				}
 
				for (var i = 0; i < fns.length; ++i) {
 
			for (i = 0; i < fns.length; ++i) {
 
					//var edid = editor.getDoc().id;
 
					var change = fns[i];
 
				change = fns[i];
 
					//if (change.doc.id != edid) continue;
 
					if (change.lines.length) {
 
						self.trace('change', 'clear text', change.lines[0].text);
 
					}
 
					change.clear();
 
				}
 
				editor.clearGutter('merge');
 
				self.trace('change', 'clear time', timer.stop());
 
			});
 
		};
 

	
 
		for (name in this.editor) {
 
			if (!this.editor.hasOwnProperty(name)) continue;
 
			editor = this.editor[name];
 
			fns = self.chfns[name];
 
			// clear editor changes
 
			editor.operation(clear_changes);
 
		}
 
		self.chfns[name] = [];
 
		
 
		var ex = this._draw_info(this.id + '-lhs', this.id + '-rhs');
 
		var ctx_lhs = ex.clhs.get(0).getContext('2d');
 
		var ctx_rhs = ex.crhs.get(0).getContext('2d');
 
		var ctx = ex.dcanvas.getContext('2d');
 
		
 
		ctx_lhs.beginPath();
 
		ctx_lhs.fillStyle = this.settings.bgcolor;
 
		ctx_lhs.strokeStyle = '#888';
 
		ctx_lhs.fillRect(0, 0, 6.5, ex.visible_page_height);
 
		ctx_lhs.strokeRect(0, 0, 6.5, ex.visible_page_height);
 

	
 
		ctx_rhs.beginPath();
 
		ctx_rhs.fillStyle = this.settings.bgcolor;
 
		ctx_rhs.strokeStyle = '#888';
 
		ctx_rhs.fillRect(0, 0, 6.5, ex.visible_page_height);
 
		ctx_rhs.strokeRect(0, 0, 6.5, ex.visible_page_height);
 
		
 
		ctx.beginPath();
 
		ctx.fillStyle = '#fff';
 
		ctx.fillRect(0, 0, this.draw_mid_width, ex.visible_page_height);
 
	},
 
	_diff: function(editor_name1, editor_name2) {
 
		var lhs = this.editor[editor_name1].getValue();
 
		var rhs = this.editor[editor_name2].getValue();
 
		var timer = new Mgly.Timer();
 
		var d = new Mgly.diff(lhs, rhs, this.settings);
 
		this.trace('change', 'diff time', timer.stop());
 
		this.changes = Mgly.DiffParser(d.normal_form());
 
		this.trace('change', 'parse time', timer.stop());
 
		if (this._current_diff === undefined) {
 
			// go to first difference on start-up
 
			this._current_diff = 0;
 
			this._scroll_to_change(this.changes[0]);
 
		}
 
		this.trace('change', 'scroll_to_change time', timer.stop());
 
		this._calculate_offsets(editor_name1, editor_name2, this.changes);
 
		this.trace('change', 'offsets time', timer.stop());
 
		this._markup_changes(editor_name1, editor_name2, this.changes);
 
		this.trace('change', 'markup time', timer.stop());
 
		this._draw_diff(editor_name1, editor_name2, this.changes);
 
		this.trace('change', 'draw time', timer.stop());
 
	},
 
	_parse_diff: function (editor_name1, editor_name2, diff) {
 
		this.trace('diff', 'diff results:\n', diff);
 
		var changes = [];
 
		var change_id = 0;
 
		// parse diff
 
		var diff_lines = diff.split(/\n/);
 
		for (var i = 0; i < diff_lines.length; ++i) {
 
			if (diff_lines[i].length == 0) continue;
 
			var change = {};
 
			var test = this.change_exp.exec(diff_lines[i]);
 
			if (test == null) continue;
 
			// lines are zero-based
 
			var fr = test[1].split(',');
 
			change['lhs-line-from'] = fr[0] - 1;
 
			if (fr.length == 1) change['lhs-line-to'] = fr[0] - 1;
 
			else change['lhs-line-to'] = fr[1] - 1;
 
			var to = test[3].split(',');
 
@@ -943,65 +1010,65 @@ jQuery.extend(Mgly.CodeMirrorDiffView.pr
 
			this.draw_lhs_width = 5;
 
			this.draw_rhs_width = 5;
 
			this.trace('calc', 'change offsets calculated', {top_offset: this.draw_top_offset, lhs_min: this.draw_lhs_min, rhs_max: this.draw_rhs_max, lhs_width: this.draw_lhs_width, rhs_width: this.draw_rhs_width});
 
		}
 
		var lhschc = this.editor[editor_name1].charCoords({line: 0});
 
		var rhschc = this.editor[editor_name2].charCoords({line: 0});
 
		var vp = this._get_viewport(editor_name1, editor_name2);
 
		
 
		for (var i = 0; i < changes.length; ++i) {
 
			var change = changes[i];
 
			
 
			if (!this.settings.sidebar && !this._is_change_in_view(vp, change)) {
 
				// if the change is outside the viewport, skip
 
				delete change['lhs-y-start'];
 
				delete change['lhs-y-end'];
 
				delete change['rhs-y-start'];
 
				delete change['rhs-y-end'];
 
				continue;
 
			}
 
			var llf = change['lhs-line-from'] >= 0 ? change['lhs-line-from'] : 0;
 
			var llt = change['lhs-line-to'] >= 0 ? change['lhs-line-to'] : 0;
 
			var rlf = change['rhs-line-from'] >= 0 ? change['rhs-line-from'] : 0;
 
			var rlt = change['rhs-line-to'] >= 0 ? change['rhs-line-to'] : 0;
 
			
 
			var ls, le, rs, re;
 
			if (this.editor[editor_name1].getOption('lineWrapping') || this.editor[editor_name1].getOption('lineWrapping')) {
 
			var ls, le, rs, re, tls, tle, lhseh, lhssh, rhssh, rhseh;
 
			if (this.editor[editor_name1].getOption('lineWrapping') || this.editor[editor_name2].getOption('lineWrapping')) {
 
				// If using line-wrapping, we must get the height of the line
 
				var tls = this.editor[editor_name1].cursorCoords({line: llf, ch: 0}, 'page');
 
				var lhssh = this.editor[editor_name1].getLineHandle(llf);
 
				tls = this.editor[editor_name1].cursorCoords({line: llf, ch: 0}, 'page');
 
				lhssh = this.editor[editor_name1].getLineHandle(llf);
 
				ls = { top: tls.top, bottom: tls.top + lhssh.height };
 

	
 
				var tle = this.editor[editor_name1].cursorCoords({line: llt, ch: 0}, 'page');
 
				var lhseh = this.editor[editor_name1].getLineHandle(llt);
 
				tle = this.editor[editor_name1].cursorCoords({line: llt, ch: 0}, 'page');
 
				lhseh = this.editor[editor_name1].getLineHandle(llt);
 
				le = { top: tle.top, bottom: tle.top + lhseh.height };
 
				
 
				var tls = this.editor[editor_name2].cursorCoords({line: rlf, ch: 0}, 'page');
 
				var rhssh = this.editor[editor_name2].getLineHandle(rlf);
 
				tls = this.editor[editor_name2].cursorCoords({line: rlf, ch: 0}, 'page');
 
				rhssh = this.editor[editor_name2].getLineHandle(rlf);
 
				rs = { top: tls.top, bottom: tls.top + rhssh.height };
 

	
 
				var tle = this.editor[editor_name2].cursorCoords({line: rlt, ch: 0}, 'page');
 
				var rhseh = this.editor[editor_name2].getLineHandle(rlt);
 
				tle = this.editor[editor_name2].cursorCoords({line: rlt, ch: 0}, 'page');
 
				rhseh = this.editor[editor_name2].getLineHandle(rlt);
 
				re = { top: tle.top, bottom: tle.top + rhseh.height };
 
			}
 
			else {
 
				// If not using line-wrapping, we can calculate the line position
 
				ls = { 
 
					top: lhschc.top + llf * this.em_height, 
 
					bottom: lhschc.bottom + llf * this.em_height + 2
 
				};
 
				le = {
 
					top: lhschc.top + llt * this.em_height, 
 
					bottom: lhschc.bottom + llt * this.em_height + 2
 
				};
 
				rs = {
 
					top: rhschc.top + rlf * this.em_height, 
 
					bottom: rhschc.bottom + rlf * this.em_height + 2
 
				};
 
				re = {
 
					top: rhschc.top + rlt * this.em_height, 
 
					bottom: rhschc.bottom + rlt * this.em_height + 2
 
				};
 
			}
 
			
 
			if (change['op'] == 'a') {
 
				// adds (right), normally start from the end of the lhs,
 
@@ -1112,99 +1179,95 @@ jQuery.extend(Mgly.CodeMirrorDiffView.pr
 
				else {
 
					// apply change for each line in-between the changed lines
 
					for (var j = rlf; j <= rlt; ++j) {
 
						red.addLineClass(j, 'background', clazz.join(' '));
 
						red.addLineClass(j, 'background', clazz.join(' '));
 
					}
 
				}
 

	
 
				if (!led.getOption('readOnly')) {
 
					// add widgets to rhs, if lhs is not read only
 
					var lhs_button = self.merge_lhs_button.clone();
 
					if (lhs_button.button) {
 
						//jquery-ui support
 
						lhs_button.button({icons: {primary: 'ui-icon-triangle-1-w'}, text: false});
 
					}
 
					lhs_button.addClass('merge-button');
 
					lhs_button.attr('id', 'merge-lhs-' + i);
 
					red.setGutterMarker(rlf, 'merge', lhs_button.get(0));
 
				}
 
			}
 
		});
 
		this.trace('change', 'markup rhs-editor time', timer.stop());
 
		
 
		// mark text deleted, LCS changes
 
		var marktext = [];
 
		for (var i = 0; this.settings.lcs && i < changes.length; ++i) {
 
		var marktext = [], i, j, k, p;
 
		for (i = 0; this.settings.lcs && i < changes.length; ++i) {
 
			var change = changes[i];
 
			var llf = change['lhs-line-from'] >= 0 ? change['lhs-line-from'] : 0;
 
			var llt = change['lhs-line-to'] >= 0 ? change['lhs-line-to'] : 0;
 
			var rlf = change['rhs-line-from'] >= 0 ? change['rhs-line-from'] : 0;
 
			var rlt = change['rhs-line-to'] >= 0 ? change['rhs-line-to'] : 0;
 
			
 
			if (!this._is_change_in_view(vp, change)) {
 
				// if the change is outside the viewport, skip
 
				continue;
 
			}
 
			if (change['op'] == 'd') {
 
				// apply delete to cross-out (left-hand side only)
 
				var from = llf;
 
				var to = llt;
 
				var to_ln = led.lineInfo(to);
 
				if (to_ln) {
 
					marktext.push([led, {line:from, ch:0}, {line:to, ch:to_ln.text.length}, {className: 'mergely ch d lhs'}]);
 
				}
 
			}
 
			else if (change['op'] == 'c') {
 
				// apply LCS changes to each line
 
				for (var j = llf, k = rlf, p = 0; 
 
				for (j = llf, k = rlf, p = 0; 
 
					 ((j >= 0) && (j <= llt)) || ((k >= 0) && (k <= rlt));
 
					 ++j, ++k) {
 
					var lhs_line, rhs_line;
 
					if (k + p > rlt) {
 
						// lhs continues past rhs, mark lhs as deleted
 
						var lhs_line = led.getLine( j );
 
						lhs_line = led.getLine( j );
 
						marktext.push([led, {line:j, ch:0}, {line:j, ch:lhs_line.length}, {className: 'mergely ch d lhs'}]);
 
						continue;
 
					}
 
					if (j + p > llt) {
 
						// rhs continues past lhs, mark rhs as added
 
						var rhs_line = red.getLine( k );
 
						rhs_line = red.getLine( k );
 
						marktext.push([red, {line:k, ch:0}, {line:k, ch:rhs_line.length}, {className: 'mergely ch a rhs'}]);
 
						continue;
 
					}
 
					var lhs_line = led.getLine( j );
 
					var rhs_line = red.getLine( k );
 
					var lhs_start = { line: -1, ch: -1 };
 
					var lhs_stop = { line: -1, ch: -1 };
 
					var rhs_start = { line: -1, ch: -1 };
 
					var rhs_stop = { line: -1, ch: -1 };
 
					
 
					lhs_line = led.getLine( j );
 
					rhs_line = red.getLine( k );
 
					var lcs = new Mgly.LCS(lhs_line, rhs_line);
 
					lcs.diff(
 
						function (from, to) {//added
 
						function added (from, to) {
 
							marktext.push([red, {line:k, ch:from}, {line:k, ch:to}, {className: 'mergely ch a rhs'}]);
 
						},
 
						removed = function (from, to) {//removed
 
						function removed (from, to) {
 
							marktext.push([led, {line:j, ch:from}, {line:j, ch:to}, {className: 'mergely ch d lhs'}]);
 
						}
 
					);
 
				}
 
			}
 
		}
 
		this.trace('change', 'LCS marktext time', timer.stop());
 
		
 
		// mark changes outside closure
 
		led.operation(function() {
 
			// apply lhs markup
 
			for (var i = 0; i < marktext.length; ++i) {
 
				var m = marktext[i];
 
				if (m[0].doc.id != led.getDoc().id) continue;
 
				self.chfns[self.id + '-lhs'].push(m[0].markText(m[1], m[2], m[3]));
 
			}
 
		});
 
		red.operation(function() {
 
			// apply lhs markup
 
			for (var i = 0; i < marktext.length; ++i) {
 
				var m = marktext[i];
 
				if (m[0].doc.id != red.getDoc().id) continue;
 
				self.chfns[self.id + '-rhs'].push(m[0].markText(m[1], m[2], m[3]));
 
			}
 
@@ -1213,93 +1276,104 @@ jQuery.extend(Mgly.CodeMirrorDiffView.pr
 
		
 
		// merge buttons
 
		var ed = {lhs:led, rhs:red};
 
		jQuery('.merge-button').on('click', function(ev){
 
			// side of mouseenter
 
			var side = 'rhs';
 
			var oside = 'lhs';
 
			var parent = jQuery(this).parents('#' + self.id + '-editor-lhs');
 
			if (parent.length) {
 
				side = 'lhs';
 
				oside = 'rhs';
 
			}
 
			var pos = ed[side].coordsChar({left:ev.pageX, top:ev.pageY});
 

	
 
			// get the change id
 
			var cid = null;
 
			var info = ed[side].lineInfo(pos.line);
 
			jQuery.each(info.bgClass.split(' '), function(i, clazz) {
 
				if (clazz.indexOf('cid-') == 0) {
 
					cid = parseInt(clazz.split('-')[1], 10);
 
					return false;
 
				}
 
			});
 
			var change = self.changes[cid];
 

	
 
			var line = {lhs: ed['lhs'].lineInfo(llt), rhs: ed['rhs'].lineInfo(rlt)};
 
			self._merge_change(change, side, oside);
 
			return false;
 
		});
 
		this.trace('change', 'markup buttons time', timer.stop());
 
	},
 
	_merge_change :	function(change, side, oside) {
 
		if (!change) return;
 
		var led = this.editor[this.id+'-lhs'];
 
		var red = this.editor[this.id+'-rhs'];
 
		var ed = {lhs:led, rhs:red};
 
		var i, from, to;
 
	
 
			var text = ed[side].getRange(
 
				CodeMirror.Pos(change[side + '-line-from'], 0),
 
				CodeMirror.Pos(change[side + '-line-to'] + 1, 0));
 
			
 
			if (change['op'] == 'c') {
 
				ed[oside].replaceRange(text,
 
					CodeMirror.Pos(change[oside + '-line-from'], 0),
 
					CodeMirror.Pos(change[oside + '-line-to'] + 1, 0));
 
			}
 
			else if (side == 'rhs') {
 
				if (change['op'] == 'a') {
 
					ed[oside].replaceRange(text,
 
						CodeMirror.Pos(change[oside + '-line-from'] + 1, 0),
 
						CodeMirror.Pos(change[oside + '-line-to'] + 1, 0));
 
				}
 
				else {// 'd'
 
					var from = parseInt(change[oside + '-line-from']);
 
					var to = parseInt(change[oside + '-line-to']);
 
					for (var i = to; i >= from; --i) {
 
						ed[oside].removeLine(i);
 
				from = parseInt(change[oside + '-line-from'], 10);
 
				to = parseInt(change[oside + '-line-to'], 10);
 
				for (i = to; i >= from; --i) {
 
					ed[oside].setCursor({line: i, ch: -1});
 
					ed[oside].execCommand('deleteLine');
 
					}
 
				}
 
			}
 
			else if (side == 'lhs') {
 
				if (change['op'] == 'a') {
 
					var from = parseInt(change[oside + '-line-from']);
 
					var to = parseInt(change[oside + '-line-to']);
 
					for (var i = to; i >= from; --i) {
 
						ed[oside].removeLine(i);
 
				from = parseInt(change[oside + '-line-from'], 10);
 
				to = parseInt(change[oside + '-line-to'], 10);
 
				for (i = to; i >= from; --i) {
 
					//ed[oside].removeLine(i);
 
					ed[oside].setCursor({line: i, ch: -1});
 
					ed[oside].execCommand('deleteLine');
 
					}
 
				}
 
				else {// 'd'
 
					ed[oside].replaceRange( text,
 
						CodeMirror.Pos(change[oside + '-line-from'] + 1, 0));
 
				}
 
			}
 
			//reset
 
			ed['lhs'].setValue(ed['lhs'].getValue());
 
			ed['rhs'].setValue(ed['rhs'].getValue());
 
			return false;
 
		});
 
		this.trace('change', 'markup buttons time', timer.stop());
 

	
 
		this._scroll_to_change(change);
 
	},
 
	_draw_info: function(editor_name1, editor_name2) {
 
		var visible_page_height = jQuery(this.editor[editor_name1].getScrollerElement()).height();
 
		var gutter_height = jQuery(this.editor[editor_name1].getScrollerElement()).children(':first-child').height();
 
		var dcanvas = document.getElementById(editor_name1 + '-' + editor_name2 + '-canvas');
 
		if (dcanvas == undefined) throw 'Failed to find: ' + editor_name1 + '-' + editor_name2 + '-canvas';
 
		var clhs = jQuery('#' + this.id + '-lhs-margin');
 
		var crhs = jQuery('#' + this.id + '-rhs-margin');
 
		return {
 
			visible_page_height: visible_page_height,
 
			gutter_height: gutter_height,
 
			visible_page_ratio: (visible_page_height / gutter_height),
 
			margin_ratio: (visible_page_height / gutter_height),
 
			lhs_scroller: jQuery(this.editor[editor_name1].getScrollerElement()),
 
			rhs_scroller: jQuery(this.editor[editor_name2].getScrollerElement()),
 
			lhs_lines: this.editor[editor_name1].lineCount(),
 
			rhs_lines: this.editor[editor_name2].lineCount(),
 
			dcanvas: dcanvas,
 
			clhs: clhs,
 
			crhs: crhs,
 
			lhs_xyoffset: jQuery(clhs).offset(),
 
			rhs_xyoffset: jQuery(crhs).offset()
 
		};
 
	},
 
@@ -1328,76 +1402,76 @@ jQuery.extend(Mgly.CodeMirrorDiffView.pr
 
		ctx_lhs.fillStyle = this.settings.bgcolor;
 
		ctx_lhs.strokeStyle = '#888';
 
		ctx_lhs.fillRect(0, 0, 6.5, ex.visible_page_height);
 
		ctx_lhs.strokeRect(0, 0, 6.5, ex.visible_page_height);
 

	
 
		ctx_rhs.beginPath();
 
		ctx_rhs.fillStyle = this.settings.bgcolor;
 
		ctx_rhs.strokeStyle = '#888';
 
		ctx_rhs.fillRect(0, 0, 6.5, ex.visible_page_height);
 
		ctx_rhs.strokeRect(0, 0, 6.5, ex.visible_page_height);
 

	
 
		var vp = this._get_viewport(editor_name1, editor_name2);
 
		for (var i = 0; i < changes.length; ++i) {
 
			var change = changes[i];
 

	
 
			this.trace('draw', change);
 
			// margin indicators
 
			var lhs_y_start = ((change['lhs-y-start'] + ex.lhs_scroller.scrollTop()) * ex.visible_page_ratio);
 
			var lhs_y_end = ((change['lhs-y-end'] + ex.lhs_scroller.scrollTop()) * ex.visible_page_ratio) + 1;
 
			var rhs_y_start = ((change['rhs-y-start'] + ex.rhs_scroller.scrollTop()) * ex.visible_page_ratio);
 
			var rhs_y_end = ((change['rhs-y-end'] + ex.rhs_scroller.scrollTop()) * ex.visible_page_ratio) + 1;
 
			this.trace('draw', 'marker calculated', lhs_y_start, lhs_y_end, rhs_y_start, rhs_y_end);
 

	
 
			ctx_lhs.beginPath();
 
			ctx_lhs.fillStyle = this.settings.fgcolor[change['op']];
 
			ctx_lhs.fillStyle = this.settings.fgcolor[(this._current_diff==i?'c':'')+change['op']];
 
			ctx_lhs.strokeStyle = '#000';
 
			ctx_lhs.lineWidth = 0.5;
 
			ctx_lhs.fillRect(1.5, lhs_y_start, 4.5, Math.max(lhs_y_end - lhs_y_start, 5));
 
			ctx_lhs.strokeRect(1.5, lhs_y_start, 4.5, Math.max(lhs_y_end - lhs_y_start, 5));
 

	
 
			ctx_rhs.beginPath();
 
			ctx_rhs.fillStyle = this.settings.fgcolor[change['op']];
 
			ctx_rhs.fillStyle = this.settings.fgcolor[(this._current_diff==i?'c':'')+change['op']];
 
			ctx_rhs.strokeStyle = '#000';
 
			ctx_rhs.lineWidth = 0.5;
 
			ctx_rhs.fillRect(1.5, rhs_y_start, 4.5, Math.max(rhs_y_end - rhs_y_start, 5));
 
			ctx_rhs.strokeRect(1.5, rhs_y_start, 4.5, Math.max(rhs_y_end - rhs_y_start, 5));
 
			
 
			if (!this._is_change_in_view(vp, change)) {
 
				continue;
 
			}
 
			
 
			lhs_y_start = change['lhs-y-start'];
 
			lhs_y_end = change['lhs-y-end'];
 
			rhs_y_start = change['rhs-y-start'];
 
			rhs_y_end = change['rhs-y-end'];
 
			
 
			var radius = 3;
 
			
 
			// draw left box
 
			ctx.beginPath();
 
			ctx.strokeStyle = this.settings.fgcolor[change['op']];
 
			ctx.lineWidth = 1;
 
			ctx.strokeStyle = this.settings.fgcolor[(this._current_diff==i?'c':'')+change['op']];
 
			ctx.lineWidth = (this._current_diff==i) ? 1.5 : 1;
 
			
 
			var rectWidth = this.draw_lhs_width;
 
			var rectHeight = lhs_y_end - lhs_y_start - 1;
 
			var rectX = this.draw_lhs_min;
 
			var rectY = lhs_y_start;
 
			// top and top top-right corner
 
			
 
			// draw left box
 
			ctx.moveTo(rectX, rectY);
 
			if (navigator.appName == 'Microsoft Internet Explorer') {
 
				// IE arcs look awful
 
				ctx.lineTo(this.draw_lhs_min + this.draw_lhs_width, lhs_y_start);
 
				ctx.lineTo(this.draw_lhs_min + this.draw_lhs_width, lhs_y_end + 1);
 
				ctx.lineTo(this.draw_lhs_min, lhs_y_end + 1);
 
			}
 
			else {
 
				if (rectHeight <= 0) {
 
					ctx.lineTo(rectX + rectWidth, rectY);
 
				}
 
				else {
 
					ctx.arcTo(rectX + rectWidth, rectY, rectX + rectWidth, rectY + radius, radius);
 
					ctx.arcTo(rectX + rectWidth, rectY + rectHeight, rectX + rectWidth - radius, rectY + rectHeight, radius);
 
				}
 
				// bottom line
 
@@ -1470,47 +1544,49 @@ jQuery.extend(Mgly.CodeMirrorDiffView.pr
 
			var y = ev.pageY - ex.lhs_xyoffset.top - (lto / 2);
 
			var sto = Math.max(0, (y / mcanvas_lhs.height) * ex.lhs_scroller.get(0).scrollHeight);
 
			ex.lhs_scroller.scrollTop(sto);
 
		});
 
		ex.crhs.click(function (ev) {
 
			var y = ev.pageY - ex.rhs_xyoffset.top - (rto / 2);
 
			var sto = Math.max(0, (y / mcanvas_rhs.height) * ex.rhs_scroller.get(0).scrollHeight);			
 
			ex.rhs_scroller.scrollTop(sto);
 
		});
 
	},
 
	trace: function(name) {
 
		if(this.settings._debug.indexOf(name) >= 0) {
 
			arguments[0] = name+':';
 
			console.log([].slice.apply(arguments));
 
		} 
 
	}
 
});
 

	
 
jQuery.pluginMaker = function(plugin) {
 
	// add the plugin function as a jQuery plugin
 
	jQuery.fn[plugin.prototype.name] = function(options) {
 
		// get the arguments 
 
		var args = jQuery.makeArray(arguments),
 
		after = args.slice(1);
 
		var rc = undefined;
 
		var rc;
 
		this.each(function() {
 
			// see if we have an instance
 
			var instance = jQuery.data(this, plugin.prototype.name);
 
			if (instance) {
 
				// call a method on the instance
 
				if (typeof options == "string") {
 
					rc = instance[options].apply(instance, after);
 
				} else if (instance.update) {
 
					// call update on the instance
 
					return instance.update.apply(instance, args);
 
				}
 
			} else {
 
				// create the plugin
 
				new plugin(this, options);
 
				var _plugin = new plugin(this, options);
 
			}
 
		});
 
		if (rc != undefined) return rc;
 
	};
 
};
 

	
 
// make the mergely widget
 
jQuery.pluginMaker(Mgly.mergely);
 

	
 
})( window, document, jQuery, CodeMirror );
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