Rkns.Renderer = {

    _MIN_DRAG_DISTANCE: 2,

    _NODE_BUTTON_WIDTH: 40,

    _EDGE_BUTTON_INNER: 2,

    _EDGE_BUTTON_OUTER: 40,

    _CLICKMODE_ADDNODE : 1,

    _CLICKMODE_STARTEDGE : 2,

    _CLICKMODE_ENDEDGE : 3,

    _IMAGE_MAX_KB : 500,

    _NODE_SIZE_STEP: Math.LN2/4,

    _MIN_SCALE: 1/20,

    _MAX_SCALE: 20,

    _MOUSEMOVE_RATE: 80,

    _DOUBLETAP_DELAY: 800,

    _DOUBLETAP_DISTANCE: 20*20,

    _USER_PLACEHOLDER : function(_renkan) {

        return {

            color: _renkan.options.default_user_color,

            title: _renkan.translate("(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);})();";

    },

    shortenText : function(_text, _maxlength) {

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

    },

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

        _selector.css({

            width: ( _options.tooltip_width - 2* _options.tooltip_padding ),

        });

        var _height = _selector.outerHeight() + 2* _options.tooltip_padding,

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

            _left = _coords.x + _isLeft * ( _xmargin + _options.tooltip_arrow_length ),

            _right = _coords.x + _isLeft * ( _xmargin + _options.tooltip_arrow_length + _options.tooltip_width ),

            _top = _coords.y - _height / 2;

        if (_top + _height > (paper.view.size.height - _options.tooltip_margin)) {

            _top = Math.max( paper.view.size.height - _options.tooltip_margin, _coords.y + _options.tooltip_arrow_width / 2 ) - _height;

        }

        if (_top < _options.tooltip_margin) {

            _top = Math.min( _options.tooltip_margin, _coords.y - _options.tooltip_arrow_width / 2 );

        }

        var _bottom = _top + _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 - _options.tooltip_arrow_width / 2;

        _path.segments[6].point.y = _coords.y + _options.tooltip_arrow_width / 2;

        _path.closed = true;

        _path.fillColor = new paper.GradientColor(new paper.Gradient([_options.tooltip_top_color, _options.tooltip_bottom_color]), [0,_top], [0, _bottom]);

        _selector.css({

            left: (_options.tooltip_padding + Math.min(_left, _right)),

            top: (_options.tooltip_padding + _top)

        });

        return _path;

    }

};

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

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

        this.renderer = _renderer;

        this.renkan = _renderer.renkan;

        this.project = _renderer.renkan.project;

        this.options = _renderer.renkan.options;

        this.model = _model;

        if (this.model) {

            var _this = this;

            this._changeBinding = function() {

                _this.redraw();

            };

            this._removeBinding = function() {

                _renderer.removeRepresentation(_this);

                _(function() {

                    _renderer.redraw();

                }).defer();

            };

            this._selectBinding = function() {

                _this.select();

            };

            this._unselectBinding = function() {

                _this.unselect();

            };

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

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

            this.model.on("select", this._selectBinding );

            this.model.on("unselect", this._unselectBinding );

        }

    }

};

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

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

};

Rkns.Renderer._BaseRepresentation.prototype.redraw = function() {};

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

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

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

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

    if (this.model) {

        this.model.trigger("selected");

    }

};

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

    if (this.model) {

        this.model.trigger("unselected");

    }

};

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

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

Rkns.Renderer._BaseRepresentation.prototype.mousedown = function() {};

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

    if (this.model) {

        this.model.trigger("clicked");

    }

};

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

    if (this.model) {

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

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

        this.model.off("select", this._selectBinding );

        this.model.off("unselect", this._unselectBinding );

    }

};

/* */

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

Rkns.Renderer._BaseButton.prototype.moveTo = function(_pos) {

    this.sector.moveTo(_pos);

};

Rkns.Renderer._BaseButton.prototype.show = function() {

    this.sector.show();

};

Rkns.Renderer._BaseButton.prototype.hide = function() {

    this.sector.hide();

};

Rkns.Renderer._BaseButton.prototype.select = function() {

    this.sector.select();

};

Rkns.Renderer._BaseButton.prototype.unselect = function(_newTarget) {

    this.sector.unselect();

    if (!_newTarget || (_newTarget !== this.source_representation && _newTarget.source_representation !== this.source_representation)) {

        this.source_representation.unselect();

    }

};

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

    this.sector.destroy();

};

/* */

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.__representation = this;

    if (this.options.show_node_circles) {

        this.circle.strokeWidth = this.options.node_stroke_width;

        this.h_ratio = 1;

    } else {

        this.h_ratio = 0;

    }

    this.title = Rkns.$('<div class="Rk-Label">').appendTo(this.renderer.labels_$);

    if (this.options.editor_mode) {

        this.normal_buttons = [

            new Rkns.Renderer.NodeEditButton(this.renderer, null),

            new Rkns.Renderer.NodeRemoveButton(this.renderer, null),

            new Rkns.Renderer.NodeLinkButton(this.renderer, null),

            new Rkns.Renderer.NodeEnlargeButton(this.renderer, null),

            new Rkns.Renderer.NodeShrinkButton(this.renderer, null)

        ];

        this.pending_delete_buttons = [

            new Rkns.Renderer.NodeRevertButton(this.renderer, null)

        ];

        this.all_buttons = this.normal_buttons.concat(this.pending_delete_buttons);

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

            this.all_buttons[i].source_representation = this;

        }

        this.active_buttons = [];

    } else {

        this.active_buttons = this.all_buttons = [];

    }

    this.last_circle_radius = 1;

    if (this.renderer.minimap) {

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

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

        this.minimap_circle.__representation = this.renderer.minimap.miniframe.__representation;

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

    }

};

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

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

        _baseRadius = this.options.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.all_buttons.forEach(function(b) {

            b.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));

        this.circle.scale(this.circle_radius / this.last_circle_radius);

        if (this.node_image) {

            this.node_image.scale(this.circle_radius / this.last_circle_radius);

        }

    }

    this.circle.position = this.paper_coords;

    if (this.node_image) {

        this.node_image.position = this.paper_coords.subtract(this.image_delta.multiply(this.circle_radius));

    }

    this.last_circle_radius = this.circle_radius;

    var old_act_btn = this.active_buttons;

    if (this.model.get("delete_scheduled")) {

        var opacity = .5;

        this.active_buttons = this.pending_delete_buttons;

        this.circle.dashArray = [2,2];

    } else {

        var opacity = 1;

        this.active_buttons = this.normal_buttons;

        this.circle.dashArray = null;

    }

    if (this.selected && this.renderer.isEditable()) {

        if (old_act_btn !== this.active_buttons) {

            old_act_btn.forEach(function(b) {

                b.hide();

            });

        }

        this.active_buttons.forEach(function(b) {

            b.show();

        });

    }

    if (this.node_image) {

        this.node_image.opacity = this.highlighted ? opacity * .5 : (opacity - .01);

    }

    this.circle.fillColor = this.highlighted ? this.options.highlighted_node_fill_color : this.options.node_fill_color;

    this.circle.opacity = this.options.show_node_circles ? opacity : .01;

    var _text = this.model.get("title") || this.renkan.translate(this.options.label_untitled_nodes) || "";

    _text = Rkns.Renderer.shortenText(_text, this.options.node_label_max_length);

    this.title.text(_text);

    this.title.css({

        left: this.paper_coords.x,

        top: this.paper_coords.y + this.circle_radius * this.h_ratio + this.options.node_label_distance,

        opacity: opacity

    });

    var _color = this.model.get("color") || (this.model.get("created_by") || Rkns.Renderer._USER_PLACEHOLDER(this.renkan)).get("color");

    this.circle.strokeColor = _color;

    var _pc = this.paper_coords;

    this.all_buttons.forEach(function(b) {

        b.moveTo(_pc);

    });

    var lastImage = this.img;

    this.img = this.model.get("image");

    if (this.img && this.img !== lastImage) {

        this.showImage();

    }

    if (this.node_image && !this.img) {

        this.node_image.remove();

        delete this.node_image;

    }

    if (this.renderer.minimap) {

        this.minimap_circle.fillColor = _color;

        var minipos = this.renderer.toMinimapCoords(_model_coords),

            miniradius = this.renderer.minimap.scale * _baseRadius,

            minisize = new paper.Size([miniradius, miniradius]);

        this.minimap_circle.fitBounds(minipos.subtract(minisize), minisize.multiply(2));

    }

    if (!_dontRedrawEdges) {

        Rkns._.each(this.project.get("edges").filter(function (ed) { return ((ed.to === this.model) || (ed.from === this.model));}), function(edge, index, list){

            var repr = this.renderer.getRepresentationByModel(edge);

            if (repr && typeof repr.from_representation !== "undefined" && typeof repr.from_representation.paper_coords !== "undefined" && typeof repr.to_representation !== "undefined" && typeof repr.to_representation.paper_coords !== "undefined") {

                repr.redraw();

            }

        }, this);

    }

};

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

    if (typeof this.renderer.image_cache[this.img] === "undefined") {

        var _image = new Image();

        this.renderer.image_cache[this.img] = _image;

        _image.src = this.img;

    } else {

        var _image = this.renderer.image_cache[this.img];

    }

    if (_image.width) {

        if (this.node_image) {

            this.node_image.remove();

        }

        this.renderer.node_layer.activate();

        var width = _image.width,

            height = _image.height,

            clipPath = this.model.get("clip-path"),

            hasClipPath = (typeof clipPath !== "undefined" && clipPath);

        if (hasClipPath) {

            var _clip = new paper.Path(),

                instructions = clipPath.match(/[a-z][^a-z]+/gi) || [],

                lastCoords = [0,0],

                minX = Infinity,

                minY = Infinity,

                maxX = -Infinity,

                maxY = -Infinity;

            function transformCoords(tabc, relative) {

                var newCoords = tabc.slice(1).map(function(v, k) {

                    var res = parseFloat(v),

                        isY = k % 2;

                    if (isY) {

                        res = ( res - .5 ) * height;

                    } else {

                        res = ( res - .5 ) * width;

                    }

                    if (relative) {

                        res += lastCoords[isY];

                    }

                    if (isY) {

                        minY = Math.min(minY, res);

                        maxY = Math.max(maxY, res);

                    } else {

                        minX = Math.min(minX, res);

                        maxX = Math.max(maxX, res);

                    }

                    return res;

                });

                lastCoords = newCoords.slice(-2);

                return newCoords;

            }

            instructions.forEach(function(instr) {

                var coords = instr.match(/([a-z]|[0-9.-]+)/ig) || [""];

                switch(coords[0]) {

                    case "M":

                        _clip.moveTo(transformCoords(coords));

                    break;

                    case "m":

                        _clip.moveTo(transformCoords(coords, true));

                    break;

                    case "L":

                        _clip.lineTo(transformCoords(coords));

                    break;

                    case "l":

                        _clip.lineTo(transformCoords(coords, true));

                    break;

                    case "C":

                        _clip.cubicCurveTo(transformCoords(coords));

                    break;

                    case "c":

                        _clip.cubicCurveTo(transformCoords(coords, true));

                    break;

                    case "Q":

                        _clip.quadraticCurveTo(transformCoords(coords));

                    break;

                    case "q":

                        _clip.quadraticCurveTo(transformCoords(coords, true));

                    break;

                }

            });

            if (!this.options.show_node_circles) {

            }

        } else {

            if (!this.options.show_node_circles) {

            }

        }

        var _raster = new paper.Raster(_image);

            /* This is a workaround to allow clipping at group level

             * If opacity was set to 1, paper.js would merge all clipping groups in one (known bug).

            */

            _clip.__representation = this;

        }

        this.node_image.__representation = _this;

        this.node_image.position = this.paper_coords.subtract(this.image_delta.multiply(this.circle_radius));

        this.redraw();

        this.renderer.throttledPaperDraw();

    } else {

        var _this = this;

        Rkns.$(_image).on("load", function() {

            _this.showImage();

        });

    }

}

Rkns.Renderer.Node.prototype.paperShift = function(_delta) {

    if (this.options.editor_mode) {

        if (!this.renkan.read_only) {

            this.is_dragging = true;

            this.paper_coords = this.paper_coords.add(_delta);

            this.redraw();

        }

    } else {

        this.renderer.paperShift(_delta);

    }

};

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

    this.renderer.removeRepresentationsOfType("editor");

    var _editor = this.renderer.addRepresentation("NodeEditor",null);

    _editor.source_representation = this;

    _editor.draw();

};

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

    this.selected = true;

    this.circle.strokeWidth = this.options.selected_node_stroke_width;

    if (this.renderer.isEditable()) {

        this.active_buttons.forEach(function(b) {

            b.show();

        });

    }

    var _uri = this.model.get("uri");