svgOMWriter.js

// Copyright (c) 2014, 2015 Adobe Systems Incorporated. All rights reserved.
// 
// 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.


/*jslint vars: true, plusplus: true, devel: true, nomen: true, indent: 4, bitwise: true */
/*global define: true, require: true, module: true */

/* Help construct the svgOM */

(function () {
"use strict";

	function SVGOMWriter() {
        
		var _root = {
                children: [],
                global: {},
                artboards: {},
                meta: {
                    PS: {}
                }
		    },
            _currentNodeStack = [],
            _docIDs = {};
        
        this._root = _root;

        this._dpi = function () {
            return (_root && _root.global.pxToInchRatio) ? _root.global.pxToInchRatio : 72.0;
        }
        
        this.peekCurrent = function () {
            if (_currentNodeStack.length > 0) {
                return _currentNodeStack[_currentNodeStack.length - 1];
            }
            return null;
        };
        this.pushCurrent = function(oNode) {
            _currentNodeStack.push(oNode);
        };
        this.popCurrent = function () {
            _currentNodeStack.pop();
        };
        this.pushCurrent(_root);
        
        this.setDocBounds = function (bounds) {
            _root.global.bounds = bounds;
        };
        
        this.setDocViewBox = function (bounds) {
            _root.global.viewBox = bounds;
        };

        this.setDocTitle = function (title) {
            _root.title = title;
        }

        this.setDocPxToInchRatio = function (pxToInchRatio) {
            _root.global.pxToInchRatio = pxToInchRatio;
        };

        this.setArtboard = function (id, title, bounds) {
            _root.artboards[id] = {
                title: title,
                bounds: bounds
            };
        }

        this.setDocGlobalLight = function (globalLight) {
            _root.meta.PS.globalLight = globalLight;
        };

        this.uniqueId = function (nodeID) {
            if (_docIDs[nodeID]) {
                return nodeID + "-" + _docIDs[nodeID]++;
            } else {
                _docIDs[nodeID] = 1;
            }
            return nodeID;
        };
        
		this.addSVGNode = function (nodeID, nodeType, nodeVisible) {
			var n = {
				id: this.uniqueId(nodeID),
                type: nodeType,
                visible: nodeVisible,
				style: {},
                children: []
			};
            this.peekCurrent().children.push(n);
			return n;
		};

		this.addFontRule = function() {
			var r = {
				"rule-type": "font",
				"style": {}
			};
            
            //Undefined... comment out until this is wired in
            //_appendRule(r);

			return r.style;
		};
        
		
		this.toSVGOM = function() {
			return _root;
		};
	}

	module.exports = SVGOMWriter;
    
}());