Current File : //proc/self/root/home/tjamichg/cursos.tjamich.gob.mx/main/inc/lib/javascript/svgedit/draw.js
/*globals $, svgedit*/
/*jslint vars: true, eqeq: true, todo: true*/
/**
* Package: svgedit.draw
*
* Licensed under the MIT License
*
* Copyright(c) 2011 Jeff Schiller
*/
// Dependencies:
// 1) jQuery
// 2) browser.js
// 3) svgutils.js
(function() {'use strict';
if (!svgedit.draw) {
svgedit.draw = {};
}
// alias
var NS = svgedit.NS;
var visElems = 'a,circle,ellipse,foreignObject,g,image,line,path,polygon,polyline,rect,svg,text,tspan,use'.split(',');
var RandomizeModes = {
LET_DOCUMENT_DECIDE: 0,
ALWAYS_RANDOMIZE: 1,
NEVER_RANDOMIZE: 2
};
var randomize_ids = RandomizeModes.LET_DOCUMENT_DECIDE;
/**
* This class encapsulates the concept of a layer in the drawing
* @param {String} name - Layer name
* @param {SVGGElement} child - Layer SVG group.
*/
svgedit.draw.Layer = function(name, group) {
this.name_ = name;
this.group_ = group;
};
/**
* @returns {string} The layer name
*/
svgedit.draw.Layer.prototype.getName = function() {
return this.name_;
};
/**
* @returns {SVGGElement} The layer SVG group
*/
svgedit.draw.Layer.prototype.getGroup = function() {
return this.group_;
};
/**
* Called to ensure that drawings will or will not have randomized ids.
* The currentDrawing will have its nonce set if it doesn't already.
* @param {boolean} enableRandomization - flag indicating if documents should have randomized ids
* @param {svgedit.draw.Drawing} currentDrawing
*/
svgedit.draw.randomizeIds = function(enableRandomization, currentDrawing) {
randomize_ids = enableRandomization === false ?
RandomizeModes.NEVER_RANDOMIZE :
RandomizeModes.ALWAYS_RANDOMIZE;
if (randomize_ids == RandomizeModes.ALWAYS_RANDOMIZE && !currentDrawing.getNonce()) {
currentDrawing.setNonce(Math.floor(Math.random() * 100001));
} else if (randomize_ids == RandomizeModes.NEVER_RANDOMIZE && currentDrawing.getNonce()) {
currentDrawing.clearNonce();
}
};
/**
* This class encapsulates the concept of a SVG-edit drawing
* @param {SVGSVGElement} svgElem - The SVG DOM Element that this JS object
* encapsulates. If the svgElem has a se:nonce attribute on it, then
* IDs will use the nonce as they are generated.
* @param {String=svg_} [opt_idPrefix] - The ID prefix to use.
*/
svgedit.draw.Drawing = function(svgElem, opt_idPrefix) {
if (!svgElem || !svgElem.tagName || !svgElem.namespaceURI ||
svgElem.tagName != 'svg' || svgElem.namespaceURI != NS.SVG) {
throw "Error: svgedit.draw.Drawing instance initialized without a <svg> element";
}
/**
* The SVG DOM Element that represents this drawing.
* @type {SVGSVGElement}
*/
this.svgElem_ = svgElem;
/**
* The latest object number used in this drawing.
* @type {number}
*/
this.obj_num = 0;
/**
* The prefix to prepend to each element id in the drawing.
* @type {String}
*/
this.idPrefix = opt_idPrefix || "svg_";
/**
* An array of released element ids to immediately reuse.
* @type {Array.<number>}
*/
this.releasedNums = [];
/**
* The z-ordered array of tuples containing layer names and <g> elements.
* The first layer is the one at the bottom of the rendering.
* TODO: Turn this into an Array.<Layer>
* @type {Array.<Array.<String, SVGGElement>>}
*/
this.all_layers = [];
/**
* The current layer being used.
* TODO: Make this a {Layer}.
* @type {SVGGElement}
*/
this.current_layer = null;
/**
* The nonce to use to uniquely identify elements across drawings.
* @type {!String}
*/
this.nonce_ = '';
var n = this.svgElem_.getAttributeNS(NS.SE, 'nonce');
// If already set in the DOM, use the nonce throughout the document
// else, if randomizeIds(true) has been called, create and set the nonce.
if (!!n && randomize_ids != RandomizeModes.NEVER_RANDOMIZE) {
this.nonce_ = n;
} else if (randomize_ids == RandomizeModes.ALWAYS_RANDOMIZE) {
this.setNonce(Math.floor(Math.random() * 100001));
}
};
/**
* @param {string} id Element ID to retrieve
* @returns {Element} SVG element within the root SVGSVGElement
*/
svgedit.draw.Drawing.prototype.getElem_ = function (id) {
if (this.svgElem_.querySelector) {
// querySelector lookup
return this.svgElem_.querySelector('#' + id);
}
// jQuery lookup: twice as slow as xpath in FF
return $(this.svgElem_).find('[id=' + id + ']')[0];
};
/**
* @returns {SVGSVGElement}
*/
svgedit.draw.Drawing.prototype.getSvgElem = function () {
return this.svgElem_;
};
/**
* @returns {!string|number} The previously set nonce
*/
svgedit.draw.Drawing.prototype.getNonce = function() {
return this.nonce_;
};
/**
* @param {!string|number} n The nonce to set
*/
svgedit.draw.Drawing.prototype.setNonce = function(n) {
this.svgElem_.setAttributeNS(NS.XMLNS, 'xmlns:se', NS.SE);
this.svgElem_.setAttributeNS(NS.SE, 'se:nonce', n);
this.nonce_ = n;
};
/**
* Clears any previously set nonce
*/
svgedit.draw.Drawing.prototype.clearNonce = function () {
// We deliberately leave any se:nonce attributes alone,
// we just don't use it to randomize ids.
this.nonce_ = '';
};
/**
* Returns the latest object id as a string.
* @return {String} The latest object Id.
*/
svgedit.draw.Drawing.prototype.getId = function () {
return this.nonce_ ?
this.idPrefix + this.nonce_ + '_' + this.obj_num :
this.idPrefix + this.obj_num;
};
/**
* Returns the next object Id as a string.
* @return {String} The next object Id to use.
*/
svgedit.draw.Drawing.prototype.getNextId = function () {
var oldObjNum = this.obj_num;
var restoreOldObjNum = false;
// If there are any released numbers in the release stack,
// use the last one instead of the next obj_num.
// We need to temporarily use obj_num as that is what getId() depends on.
if (this.releasedNums.length > 0) {
this.obj_num = this.releasedNums.pop();
restoreOldObjNum = true;
} else {
// If we are not using a released id, then increment the obj_num.
this.obj_num++;
}
// Ensure the ID does not exist.
var id = this.getId();
while (this.getElem_(id)) {
if (restoreOldObjNum) {
this.obj_num = oldObjNum;
restoreOldObjNum = false;
}
this.obj_num++;
id = this.getId();
}
// Restore the old object number if required.
if (restoreOldObjNum) {
this.obj_num = oldObjNum;
}
return id;
};
/**
* Releases the object Id, letting it be used as the next id in getNextId().
* This method DOES NOT remove any elements from the DOM, it is expected
* that client code will do this.
* @param {string} id - The id to release.
* @returns {boolean} True if the id was valid to be released, false otherwise.
*/
svgedit.draw.Drawing.prototype.releaseId = function (id) {
// confirm if this is a valid id for this Document, else return false
var front = this.idPrefix + (this.nonce_ ? this.nonce_ + '_' : '');
if (typeof id !== 'string' || id.indexOf(front) !== 0) {
return false;
}
// extract the obj_num of this id
var num = parseInt(id.substr(front.length), 10);
// if we didn't get a positive number or we already released this number
// then return false.
if (typeof num !== 'number' || num <= 0 || this.releasedNums.indexOf(num) != -1) {
return false;
}
// push the released number into the released queue
this.releasedNums.push(num);
return true;
};
/**
* Returns the number of layers in the current drawing.
* @returns {integer} The number of layers in the current drawing.
*/
svgedit.draw.Drawing.prototype.getNumLayers = function() {
return this.all_layers.length;
};
/**
* Check if layer with given name already exists
* @param {string} name - The layer name to check
*/
svgedit.draw.Drawing.prototype.hasLayer = function (name) {
var i;
for (i = 0; i < this.getNumLayers(); i++) {
if(this.all_layers[i][0] == name) {return true;}
}
return false;
};
/**
* Returns the name of the ith layer. If the index is out of range, an empty string is returned.
* @param {integer} i - The zero-based index of the layer you are querying.
* @returns {string} The name of the ith layer (or the empty string if none found)
*/
svgedit.draw.Drawing.prototype.getLayerName = function (i) {
if (i >= 0 && i < this.getNumLayers()) {
return this.all_layers[i][0];
}
return '';
};
/**
* @returns {SVGGElement} The SVGGElement representing the current layer.
*/
svgedit.draw.Drawing.prototype.getCurrentLayer = function() {
return this.current_layer;
};
/**
* Returns the name of the currently selected layer. If an error occurs, an empty string
* is returned.
* @returns The name of the currently active layer (or the empty string if none found).
*/
svgedit.draw.Drawing.prototype.getCurrentLayerName = function () {
var i;
for (i = 0; i < this.getNumLayers(); ++i) {
if (this.all_layers[i][1] == this.current_layer) {
return this.getLayerName(i);
}
}
return '';
};
/**
* Sets the current layer. If the name is not a valid layer name, then this
* function returns false. Otherwise it returns true. This is not an
* undo-able action.
* @param {string} name - The name of the layer you want to switch to.
* @returns {boolean} true if the current layer was switched, otherwise false
*/
svgedit.draw.Drawing.prototype.setCurrentLayer = function(name) {
var i;
for (i = 0; i < this.getNumLayers(); ++i) {
if (name == this.getLayerName(i)) {
if (this.current_layer != this.all_layers[i][1]) {
this.current_layer.setAttribute("style", "pointer-events:none");
this.current_layer = this.all_layers[i][1];
this.current_layer.setAttribute("style", "pointer-events:all");
}
return true;
}
}
return false;
};
/**
* Deletes the current layer from the drawing and then clears the selection.
* This function then calls the 'changed' handler. This is an undoable action.
* @returns {SVGGElement} The SVGGElement of the layer removed or null.
*/
svgedit.draw.Drawing.prototype.deleteCurrentLayer = function() {
if (this.current_layer && this.getNumLayers() > 1) {
// actually delete from the DOM and return it
var parent = this.current_layer.parentNode;
var nextSibling = this.current_layer.nextSibling;
var oldLayerGroup = parent.removeChild(this.current_layer);
this.identifyLayers();
return oldLayerGroup;
}
return null;
};
/**
* Updates layer system and sets the current layer to the
* top-most layer (last <g> child of this drawing).
*/
svgedit.draw.Drawing.prototype.identifyLayers = function() {
this.all_layers = [];
var numchildren = this.svgElem_.childNodes.length;
// loop through all children of SVG element
var orphans = [], layernames = [];
var a_layer = null;
var childgroups = false;
var i;
for (i = 0; i < numchildren; ++i) {
var child = this.svgElem_.childNodes.item(i);
// for each g, find its layer name
if (child && child.nodeType == 1) {
if (child.tagName == "g") {
childgroups = true;
var name = $("title", child).text();
// Hack for Opera 10.60
if(!name && svgedit.browser.isOpera() && child.querySelectorAll) {
name = $(child.querySelectorAll('title')).text();
}
// store layer and name in global variable
if (name) {
layernames.push(name);
this.all_layers.push( [name, child] );
a_layer = child;
svgedit.utilities.walkTree(child, function(e){e.setAttribute("style", "pointer-events:inherit");});
a_layer.setAttribute("style", "pointer-events:none");
}
// if group did not have a name, it is an orphan
else {
orphans.push(child);
}
}
// if child has is "visible" (i.e. not a <title> or <defs> element), then it is an orphan
else if(~visElems.indexOf(child.nodeName)) {
var bb = svgedit.utilities.getBBox(child);
orphans.push(child);
}
}
}
// create a new layer and add all the orphans to it
var svgdoc = this.svgElem_.ownerDocument;
if (orphans.length > 0 || !childgroups) {
i = 1;
// TODO(codedread): What about internationalization of "Layer"?
while (layernames.indexOf(("Layer " + i)) >= 0) { i++; }
var newname = "Layer " + i;
a_layer = svgdoc.createElementNS(NS.SVG, "g");
var layer_title = svgdoc.createElementNS(NS.SVG, "title");
layer_title.textContent = newname;
a_layer.appendChild(layer_title);
var j;
for (j = 0; j < orphans.length; ++j) {
a_layer.appendChild(orphans[j]);
}
this.svgElem_.appendChild(a_layer);
this.all_layers.push( [newname, a_layer] );
}
svgedit.utilities.walkTree(a_layer, function(e){e.setAttribute("style", "pointer-events:inherit");});
this.current_layer = a_layer;
this.current_layer.setAttribute("style", "pointer-events:all");
};
/**
* Creates a new top-level layer in the drawing with the given name and
* sets the current layer to it.
* @param {string} name - The given name
* @returns {SVGGElement} The SVGGElement of the new layer, which is
* also the current layer of this drawing.
*/
svgedit.draw.Drawing.prototype.createLayer = function(name) {
var svgdoc = this.svgElem_.ownerDocument;
var new_layer = svgdoc.createElementNS(NS.SVG, "g");
var layer_title = svgdoc.createElementNS(NS.SVG, "title");
layer_title.textContent = name;
new_layer.appendChild(layer_title);
this.svgElem_.appendChild(new_layer);
this.identifyLayers();
return new_layer;
};
/**
* Returns whether the layer is visible. If the layer name is not valid,
* then this function returns false.
* @param {string} layername - The name of the layer which you want to query.
* @returns {boolean} The visibility state of the layer, or false if the layer name was invalid.
*/
svgedit.draw.Drawing.prototype.getLayerVisibility = function(layername) {
// find the layer
var layer = null;
var i;
for (i = 0; i < this.getNumLayers(); ++i) {
if (this.getLayerName(i) == layername) {
layer = this.all_layers[i][1];
break;
}
}
if (!layer) {return false;}
return (layer.getAttribute('display') !== 'none');
};
/**
* Sets the visibility of the layer. If the layer name is not valid, this
* function returns false, otherwise it returns true. This is an
* undo-able action.
* @param {string} layername - The name of the layer to change the visibility
* @param {boolean} bVisible - Whether the layer should be visible
* @returns {?SVGGElement} The SVGGElement representing the layer if the
* layername was valid, otherwise null.
*/
svgedit.draw.Drawing.prototype.setLayerVisibility = function(layername, bVisible) {
if (typeof bVisible !== 'boolean') {
return null;
}
// find the layer
var layer = null;
var i;
for (i = 0; i < this.getNumLayers(); ++i) {
if (this.getLayerName(i) == layername) {
layer = this.all_layers[i][1];
break;
}
}
if (!layer) {return null;}
var oldDisplay = layer.getAttribute("display");
if (!oldDisplay) {oldDisplay = "inline";}
layer.setAttribute("display", bVisible ? "inline" : "none");
return layer;
};
/**
* Returns the opacity of the given layer. If the input name is not a layer, null is returned.
* @param {string} layername - name of the layer on which to get the opacity
* @returns {?number} The opacity value of the given layer. This will be a value between 0.0 and 1.0, or null
* if layername is not a valid layer
*/
svgedit.draw.Drawing.prototype.getLayerOpacity = function(layername) {
var i;
for (i = 0; i < this.getNumLayers(); ++i) {
if (this.getLayerName(i) == layername) {
var g = this.all_layers[i][1];
var opacity = g.getAttribute('opacity');
if (!opacity) {
opacity = '1.0';
}
return parseFloat(opacity);
}
}
return null;
};
/**
* Sets the opacity of the given layer. If the input name is not a layer,
* nothing happens. If opacity is not a value between 0.0 and 1.0, then
* nothing happens.
* @param {string} layername - Name of the layer on which to set the opacity
* @param {number} opacity - A float value in the range 0.0-1.0
*/
svgedit.draw.Drawing.prototype.setLayerOpacity = function(layername, opacity) {
if (typeof opacity !== 'number' || opacity < 0.0 || opacity > 1.0) {
return;
}
var i;
for (i = 0; i < this.getNumLayers(); ++i) {
if (this.getLayerName(i) == layername) {
var g = this.all_layers[i][1];
g.setAttribute("opacity", opacity);
break;
}
}
};
}());
Mini Shell