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// ### Used by nearly every other module
//
SVG.Element = function Element(node) {
/* keep reference to the element node */
this.node = node;
/* initialize attribute store with defaults */
this.attrs = {
'fill-opacity': 1,
'stroke-opacity': 1,
'stroke-width': 0
};
/* initialize transformation store with defaults */
this.trans = {
x: 0,
y: 0,
scaleX: 1,
scaleY: 1,
rotation: 0,
skewX: 0,
skewY: 0
};
};
//
SVG.extend(SVG.Element, {
// Move element to given x and y values
move: function(x, y) {
return this.attr({
x: x,
y: y
});
},
// Move element by its center
center: function(x, y) {
var box = this.bbox();
return this.move(x - box.width / 2, y - box.height / 2);
},
// Set element size to given width and height
size: function(width, height) {
return this.attr({
width: width,
height: height
});
},
// Clone element
clone: function() {
var clone;
/* if this is a wrapped shape */
if (this instanceof Wrap) {
/* build new wrapped shape */
clone = this.parent[this.child.node.nodeName]();
/* copy child attributes and transformations */
clone.child.trans = this.child.trans;
clone.child.attr(this.child.attrs).transform({});
} else {
var name = this.node.nodeName;
/* invoke shape method with shape-specific arguments */
clone = name == 'rect' ?
this.parent[name](this.attrs.width, this.attrs.height) :
name == 'ellipse' ?
this.parent[name](this.attrs.rx * 2, this.attrs.ry * 2) :
name == 'image' ?
this.parent[name](this.src) :
name == 'text' ?
this.parent[name](this.content) :
name == 'g' ?
this.parent.group() :
this.parent[name]();
}
/* copy transformations */
clone.trans = this.trans;
/* apply attributes and translations */
return clone.attr(this.attrs).transform({});
},
// Remove element
remove: function() {
return this.parent != null ? this.parent.remove(this) : void 0;
},
// Get parent document
parentDoc: function() {
return this._parent(SVG.Doc);
},
// Set svg element attribute
attr: function(a, v, n) {
if (arguments.length < 2) {
/* apply every attribute individually if an object is passed */
if (typeof a == 'object')
for (v in a) this.attr(v, a[v]);
/* act as a getter for style attributes */
else if (this._isStyle(a))
return a == 'text' ?
this.content :
a == 'leading' ?
this[a] :
this.style[a];
/* act as a getter if the first and only argument is not an object */
else
return this.attrs[a];
} else {
/* store value */
this.attrs[a] = v;
/* treat x differently on text elements */
if (a == 'x' && this._isText())
for (var i = this.lines.length - 1; i >= 0; i--)
this.lines[i].attr(a, v);
/* set the actual attribute */
else
n != null ?
this.node.setAttributeNS(n, a, v) :
this.node.setAttribute(a, v);
/* if the passed argument belongs to the style as well, add it there */
if (this._isStyle(a)) {
a == 'text' ?
this.text(v) :
a == 'leading' ?
this[a] = v :
this.style[a] = v;
this.text(this.content);
}
}
return this;
},
// Manage transformations
transform: function(o) {
/* act as a getter if the first argument is a string */
if (typeof o === 'string')
return this.trans[o];
/* ... otherwise continue as a setter */
var key, transform = [];
/* merge values */
for (key in o)
if (o[key] != null)
this.trans[key] = o[key];
/* alias current transformations */
o = this.trans;
/* add rotation */
if (o.rotation != 0) {
var box = this.bbox();
transform.push('rotate(' + o.rotation + ',' + (o.cx != null ? o.cx : box.cx) + ',' + (o.cy != null ? o.cy : box.cy) + ')');
}
/* add scale */
transform.push('scale(' + o.scaleX + ',' + o.scaleY + ')');
/* add skew on x axis */
if (o.skewX != 0)
transform.push('skewX(' + o.skewX + ')');
/* add skew on y axis */
if (o.skewY != 0)
transform.push('skewY(' + o.skewY + ')')
/* add translation */
transform.push('translate(' + o.x + ',' + o.y + ')');
/* add only te required transformations */
return this.attr('transform', transform.join(' '));
},
// Get bounding box
bbox: function() {
/* actual, native bounding box */
var box = this.node.getBBox();
return {
/* include translations on x an y */
x: box.x + this.trans.x,
y: box.y + this.trans.y,
/* add the center */
cx: box.x + this.trans.x + box.width / 2,
cy: box.y + this.trans.y + box.height / 2,
/* plain width and height */
width: box.width,
height: box.height
};
},
// Checks whether the given point inside the bounding box of the element
inside: function(x, y) {
var box = this.bbox();
return x > box.x &&
y > box.y &&
x < box.x + box.width &&
y < box.y + box.height;
},
// Show element
show: function() {
this.node.style.display = '';
return this;
},
// Hide element
hide: function() {
this.node.style.display = 'none';
return this;
},
// Private: find svg parent by instance
_parent: function(parent) {
var element = this;
while (element != null && !(element instanceof parent))
element = element.parent;
return element;
},
// Private: tester method for style detection
_isStyle: function(attr) {
return typeof attr == 'string' && this._isText() ? (/^font|text|leading/).test(attr) : false;
},
// Private: element type tester
_isText: function() {
return this instanceof SVG.Text;
}
});
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