Rkns.Renderer = {

    _MINIMAP_MARGIN_X: 20,

    _MINIMAP_MARGIN_Y: 20,

    _MIN_DRAG_DISTANCE: 2,

    _NODE_SIZE_BASE: 25,

    _NODE_BUTTON_WIDTH: 40,

    _EDGE_BUTTON_INNER: 2,

    _EDGE_BUTTON_OUTER: 40,

    _NODE_FONT_SIZE: 10,

    _EDGE_FONT_SIZE: 9,

    _EDGE_DISTANCE: 3,

    _NODE_MAX_CHAR: 50,

    _EDGE_MAX_CHAR: 40,

    _ARROW_LENGTH: 18,

    _ARROW_WIDTH: 12,

    _EDITOR_ARROW_LENGTH : 20,

    _EDITOR_ARROW_WIDTH : 40,

    _EDITOR_WIDTH : 275,

    _EDITOR_MARGIN : 15,

    _EDITOR_PADDING : 10,

    _EDITOR_GRADIENT : new paper.Gradient(['#f0f0f0', '#d0d0d0']),

    _CLICKMODE_ADDNODE : 1,

    _CLICKMODE_STARTEDGE : 2,

    _CLICKMODE_ENDEDGE : 3,

    _IMAGE_MAX_KB : 500,

    _NODE_SIZE_STEP: Math.LN2/4,

    _MINIMAP_WIDTH: 160,

    _MINIMAP_HEIGHT: 120,

    _USER_PLACEHOLDER : {

        color: "#000000",

        title: "(unknown user)",

        get: function(attr) {

            return this[attr] || false;

        }

    },

    _BOOKMARKLET_CODE: function(_renkan) {

    	return "(function(a,b,c,d,e,f,h,i,j,k,l,m,n,o,p,q,r){a=document;b=a.body;c=a.location.href;j='draggable';m='text/x-iri-';d=a.createElement('div');d.innerHTML='<p_style=\"position:fixed;top:0;right:0;font:bold_18px_sans-serif;color:#fff;background:#909;padding:10px;z-index:100000;\">"

	    + _renkan.translate("Drag items from this website, drop them in Renkan").replace(/ /g,"_")

	    + "</p>'.replace(/_/g,String.fromCharCode(32));b.appendChild(d);e=[{r:/https?:\\/\\/[^\\/]*twitter\\.com\\//,s:'.tweet',n:'twitter'},{r:/https?:\\/\\/[^\\/]*google\\.[^\\/]+\\//,s:'.g',n:'google'},{r:/https?:\\/\\/[^\\/]*lemonde\\.fr\\//,s:'[data-vr-contentbox]',n:'lemonde'}];f=false;e.forEach(function(g){if(g.r.test(c)){f=g;}});if(f){h=function(){Array.prototype.forEach.call(a.querySelectorAll(f.s),function(i){i[j]=true;k=i.style;k.borderWidth='2px';k.borderColor='#909';k.borderStyle='solid';k.backgroundColor='rgba(200,0,180,.1)';})};window.setInterval(h,500);h();};a.addEventListener('dragstart',function(k){l=k.dataTransfer;l.setData(m+'source-uri',c);l.setData(m+'source-title',a.title);n=k.target;if(f){o=n;while(!o.attributes[j]){o=o.parentNode;if(o==b){break;}}}if(f&&o.attributes[j]){p=o.cloneNode(true);l.setData(m+'specific-site',f.n)}else{q=a.getSelection();if(q.type==='Range'||!q.type){p=q.getRangeAt(0).cloneContents();}else{p=n.cloneNode();}}r=a.createElement('div');r.appendChild(p);l.setData('text/x-iri-selected-text',r.textContent.trim());l.setData('text/x-iri-selected-html',r.innerHTML);},false);})();"

    }

}

Rkns.Renderer.Utils = {

	shortenText : function(_text, _maxlength) {

		return (_text.length > _maxlength ? (_text.substr(0,_maxlength) + '…') : _text);

	},

    drawEditBox : function(_coords, _path, _width, _xmargin, _selector) {

        _selector.css({

            width: (_width - 2* Rkns.Renderer._EDITOR_PADDING),

        })

        var _height = _selector.outerHeight() + 2* Rkns.Renderer._EDITOR_PADDING,

            _isLeft = (_coords.x < paper.view.center.x ? 1 : -1),

            _left = _coords.x + _isLeft * ( _xmargin + Rkns.Renderer._EDITOR_ARROW_LENGTH ),

            _right = _coords.x + _isLeft * ( _xmargin + Rkns.Renderer._EDITOR_ARROW_LENGTH + _width ),

            _top = _coords.y - _height / 2;

        if (_top < Rkns.Renderer._EDITOR_MARGIN) {

            _top = Math.min( Rkns.Renderer._EDITOR_MARGIN, _coords.y - Rkns.Renderer._EDITOR_ARROW_WIDTH / 2 );

        }

        var _bottom = _top + _height;

        if (_bottom > (paper.view.size.height - Rkns.Renderer._EDITOR_MARGIN)) {

            _bottom = Math.max( paper.view.size.height - Rkns.Renderer._EDITOR_MARGIN, _coords.y + Rkns.Renderer._EDITOR_ARROW_WIDTH / 2 );

            _top = _bottom - _height;

        }

        _path.segments[0].point

            = _path.segments[7].point

            = _coords.add([_isLeft * _xmargin, 0]);

        _path.segments[1].point.x

            = _path.segments[2].point.x

            = _path.segments[5].point.x

            = _path.segments[6].point.x

            = _left;

        _path.segments[3].point.x

            = _path.segments[4].point.x

            = _right;

        _path.segments[2].point.y

            = _path.segments[3].point.y

            = _top;

        _path.segments[4].point.y

            = _path.segments[5].point.y

            = _bottom;

        _path.segments[1].point.y = _coords.y - Rkns.Renderer._EDITOR_ARROW_WIDTH / 2;

        _path.segments[6].point.y = _coords.y + Rkns.Renderer._EDITOR_ARROW_WIDTH / 2;

        _path.closed = true;

        _path.fillColor = new paper.GradientColor(Rkns.Renderer._EDITOR_GRADIENT, [0,_top], [0, _bottom]);

        _selector.css({

            left: (Rkns.Renderer._EDITOR_PADDING + Math.min(_left, _right)),

            top: (Rkns.Renderer._EDITOR_PADDING + _top)

        });

    },

    sector : function(_repr, _inR, _outR, _startAngle, _endAngle, _padding, _imgsrc, _caption) {

        var _startRads = _startAngle * Math.PI / 180,

            _endRads = _endAngle * Math.PI / 180,

            _img = new Image(),

            _span = _endRads - _startRads,

            _k = .0879 * _span,

            _kin = _k * _inR,

            _kout = _k * _outR,

            _startdx = - Math.sin(_startRads),

            _startdy = Math.cos(_startRads),

            _startXIn = Math.cos(_startRads) * _inR + _padding * _startdx,

            _startYIn = Math.sin(_startRads) * _inR + _padding * _startdy,

            _startXOut = Math.cos(_startRads) * _outR + _padding * _startdx,

            _startYOut = Math.sin(_startRads) * _outR + _padding * _startdy,

            _enddx = - Math.sin(_endRads),

            _enddy = Math.cos(_endRads),

            _endXIn = Math.cos(_endRads) * _inR - _padding * _enddx,

            _endYIn = Math.sin(_endRads) * _inR - _padding * _enddy,

            _endXOut = Math.cos(_endRads) * _outR - _padding * _enddx,

            _endYOut = Math.sin(_endRads) * _outR - _padding * _enddy,

            _centerR = (_inR + _outR)/2,

            _centerRads = (_startRads + _endRads) / 2,

            _centerX = Math.cos(_centerRads) * _centerR,

            _centerY = Math.sin(_centerRads) * _centerR,

            _centerXIn = Math.cos(_centerRads) * _inR,

            _centerXOut = Math.cos(_centerRads) * _outR,

            _centerYIn = Math.sin(_centerRads) * _inR,

            _centerYOut = Math.sin(_centerRads) * _outR,

            _textX = Math.cos(_centerRads) * (_outR + 3),

            _textY = Math.sin(_centerRads) * (_outR + 3),

            _segments = [];

    	_repr.renderer.buttons_layer.activate();

        var _path = new paper.Path();

        _path.add([_startXIn, _startYIn]);

        _path.arcTo([_centerXIn, _centerYIn], [_endXIn, _endYIn]);

        _path.lineTo([_endXOut,  _endYOut]);

        _path.arcTo([_centerXOut, _centerYOut], [_startXOut, _startYOut]);

        _path.fillColor = "#333333";

        _path.opacity = .5;

        _path.closed = true;

        _path.__representation = _repr;

        if (_textX >= -2 && _textX <= 2) {

            if (_textY > 0) {

                _textY += 6;

            }

        }

        var _text = new paper.PointText(_textX,_textY);

        _text.characterStyle = {

            fontSize: 9,

            fillColor: '#c000c0'

        };

        if (_textX > 2) {

            _text.paragraphStyle.justification = 'left';

        } else if (_textX < -2) {

            _text.paragraphStyle.justification = 'right';

        } else {

            _text.paragraphStyle.justification = 'center';

        }

        _text.visible = false;

        var _visible = false,

            _restPos = new paper.Point(-200, -200),

            _grp = new paper.Group([_path, _text]),

            _delta = _grp.position,

            _imgdelta = new paper.Point([_centerX, _centerY]),

            _currentPos = new paper.Point(0,0);

        _text.content = _caption;

        _grp.visible = false;

        _grp.position = _restPos;

        var _res = {

            show: function() {

                _visible = true;

                _grp.position = _currentPos.add(_delta);

                _grp.visible = true;

            },

            moveTo: function(_point) {

                _currentPos = _point;

                if (_visible) {

                    _grp.position = _point.add(_delta);

                }

            },

            hide: function() {

                _visible = false;

                _grp.visible = false;

                _grp.position = _restPos;

            },

            select: function() {

                _path.opacity = .8;

                _text.visible = true;

            },

            unselect: function() {

                _path.opacity = .5;

                _text.visible = false;

            },

            destroy: function() {

                _grp.remove();

            }

        }

        _img.onload = function() {

            var _h = _img.height;

            var _raster = new paper.Raster(_img);

            _raster.position = _imgdelta.add(_grp.position).subtract(_delta);

            _grp.addChild(_raster);

        }

        _img.src = _imgsrc;

        return _res

    }

}

Rkns.Renderer._BaseRepresentation = function(_renderer, _model) {

    if (typeof _renderer !== "undefined") {

        this.renderer = _renderer;

        this.project = _renderer.renkan.project;

        this.model = _model;

        if (this.model) {

            var _this = this;

            this._changeBinding = function() {

                _this.redraw();

            }

            this._removeBinding = function() {

                _renderer.removeRepresentation(_this);

            }

            this.model.on("change", this._changeBinding );

            this.model.on("remove", this._removeBinding );

        }

    }

}

Rkns.Renderer._BaseRepresentation.prototype.super = function(_func) {

    Rkns.Renderer._BaseRepresentation.prototype[_func].apply(this, Array.prototype.slice.call(arguments, 1));

}

Rkns.Renderer._BaseRepresentation.prototype.moveTo = function() {}

Rkns.Renderer._BaseRepresentation.prototype.show = function() {}

Rkns.Renderer._BaseRepresentation.prototype.hide = function() {}

Rkns.Renderer._BaseRepresentation.prototype.select = function() {}

Rkns.Renderer._BaseRepresentation.prototype.unselect = function() {}

Rkns.Renderer._BaseRepresentation.prototype.highlight = function() {}

Rkns.Renderer._BaseRepresentation.prototype.unhighlight = function() {}

Rkns.Renderer._BaseRepresentation.prototype.mouseup = function() {}

Rkns.Renderer._BaseRepresentation.prototype.destroy = function() {

    if (this.model) {

        this.model.off("change", this._changeBinding );

        this.model.off("remove", this._removeBinding );

    }

}

Rkns.Renderer.Node = Rkns.Utils.inherit(Rkns.Renderer._BaseRepresentation);

Rkns.Renderer.Node.prototype._init = function() {

    this.renderer.node_layer.activate();

    this.type = "Node";

    this.circle = new paper.Path.Circle([0, 0], 1);

    this.circle.fillColor = '#ffffff';

    this.circle.__representation = this;

    this.circle.strokeWidth = 2;

    this.title = new paper.PointText([0,0]);

    this.title.characterStyle = {

        fontSize: Rkns.Renderer._NODE_FONT_SIZE,

        fillColor: 'black'

    };

        this.edit_button = new Rkns.Renderer.NodeEditButton(this.renderer, null);

        this.edit_button.node_representation = this;

        this.remove_button = new Rkns.Renderer.NodeRemoveButton(this.renderer, null);

        this.remove_button.node_representation = this;

        this.link_button = new Rkns.Renderer.NodeLinkButton(this.renderer, null);

        this.link_button.node_representation = this;

    }

    this.last_circle_radius = 1;

    this.title.paragraphStyle.justification = 'center';

    this.renderer.minimap.node_layer.activate();

    this.minimap_circle = new paper.Path.Circle([0, 0], 1);

    this.renderer.minimap.node_group.addChild(this.minimap_circle);

}

Rkns.Renderer.Node.prototype.redraw = function() {

    var _model_coords = new paper.Point(this.model.get("position")),

    	_baseRadius = Rkns.Renderer._NODE_SIZE_BASE * Math.exp((this.model.get("size") || 0) * Rkns.Renderer._NODE_SIZE_STEP);

    if (!this.is_dragging || !this.paper_coords) {

        this.paper_coords = this.renderer.toPaperCoords(_model_coords);

    }

    this.circle_radius = _baseRadius * this.renderer.scale;

    if (this.last_circle_radius !== this.circle_radius) {

	    	this.edit_button.setSectorSize();

	    	this.remove_button.setSectorSize();

	    	this.link_button.setSectorSize();

	    }

	    var square = new paper.Size(this.circle_radius, this.circle_radius),

	    	topleft = this.paper_coords.subtract(square),

	    	bounds = new paper.Rectangle(topleft, square.multiply(2));