import “../format/collapse”; import “../format/requote”; import “selection”;
d3_selectionPrototype.classed = function(name, value) {
if (arguments.length < 2) { // For classed(string), return true only if the first node has the specified // class or classes. Note that even if the browser supports DOMTokenList, it // probably doesn't support it on SVG elements (which can be animated). if (typeof name === "string") { var node = this.node(), n = (name = name.trim().split(/^|\s+/g)).length, i = -1; if (value = node.classList) { while (++i < n) if (!value.contains(name[i])) return false; } else { value = node.getAttribute("class"); while (++i < n) if (!d3_selection_classedRe(name[i]).test(value)) return false; } return true; } // For classed(object), the object specifies the names of classes to add or // remove. The values may be functions that are evaluated for each element. for (value in name) this.each(d3_selection_classed(value, name[value])); return this; } // Otherwise, both a name and a value are specified, and are handled as below. return this.each(d3_selection_classed(name, value));
};
function d3_selection_classedRe(name) {
return new RegExp("(?:^|\\s+)" + d3.requote(name) + "(?:\\s+|$)", "g");
}
// Multiple class names are allowed (e.g., “foo bar”). function d3_selection_classed(name, value) {
name = name.trim().split(/\s+/).map(d3_selection_classedName); var n = name.length; function classedConstant() { var i = -1; while (++i < n) name[i](this, value); } // When the value is a function, the function is still evaluated only once per // element even if there are multiple class names. function classedFunction() { var i = -1, x = value.apply(this, arguments); while (++i < n) name[i](this, x); } return typeof value === "function" ? classedFunction : classedConstant;
}
function d3_selection_classedName(name) {
var re = d3_selection_classedRe(name); return function(node, value) { if (c = node.classList) return value ? c.add(name) : c.remove(name); var c = node.getAttribute("class") || ""; if (value) { re.lastIndex = 0; if (!re.test(c)) node.setAttribute("class", d3_collapse(c + " " + name)); } else { node.setAttribute("class", d3_collapse(c.replace(re, " "))); } };
}