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e7b2eb4 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 | import "../core/ns";
import "selection";
d3_selectionPrototype.attr = function(name, value) {
if (arguments.length < 2) {
// For attr(string), return the attribute value for the first node.
if (typeof name === "string") {
var node = this.node();
name = d3.ns.qualify(name);
return name.local
? node.getAttributeNS(name.space, name.local)
: node.getAttribute(name);
}
// For attr(object), the object specifies the names and values of the
// attributes to set or remove. The values may be functions that are
// evaluated for each element.
for (value in name) this.each(d3_selection_attr(value, name[value]));
return this;
}
return this.each(d3_selection_attr(name, value));
};
function d3_selection_attr(name, value) {
name = d3.ns.qualify(name);
// For attr(string, null), remove the attribute with the specified name.
function attrNull() {
this.removeAttribute(name);
}
function attrNullNS() {
this.removeAttributeNS(name.space, name.local);
}
// For attr(string, string), set the attribute with the specified name.
function attrConstant() {
this.setAttribute(name, value);
}
function attrConstantNS() {
this.setAttributeNS(name.space, name.local, value);
}
// For attr(string, function), evaluate the function for each element, and set
// or remove the attribute as appropriate.
function attrFunction() {
var x = value.apply(this, arguments);
if (x == null) this.removeAttribute(name);
else this.setAttribute(name, x);
}
function attrFunctionNS() {
var x = value.apply(this, arguments);
if (x == null) this.removeAttributeNS(name.space, name.local);
else this.setAttributeNS(name.space, name.local, x);
}
return value == null
? (name.local ? attrNullNS : attrNull) : (typeof value === "function"
? (name.local ? attrFunctionNS : attrFunction)
: (name.local ? attrConstantNS : attrConstant));
}
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