dojo.provide("dijit.form.HorizontalRuleLabels");

dojo.require("dijit.form.HorizontalRule");

dojo.declare("dijit.form.HorizontalRuleLabels", dijit.form.HorizontalRule,
{
	// summary:
	//		Labels for `dijit.form.HorizontalSlider`

	templateString: '<div class="dijitRuleContainer dijitRuleContainerH dijitRuleLabelsContainer dijitRuleLabelsContainerH"></div>',

	// labelStyle: String
	//		CSS style to apply to individual text labels
	labelStyle: "",

	// labels: String[]?
	//		Array of text labels to render - evenly spaced from left-to-right or bottom-to-top.
	//		Alternately, minimum and maximum can be specified, to get numeric labels.
	labels: [],

	// numericMargin: Integer
	//		Number of generated numeric labels that should be rendered as '' on the ends when labels[] are not specified
	numericMargin: 0,

	// numericMinimum: Integer
	//		Leftmost label value for generated numeric labels when labels[] are not specified
	minimum: 0,

	// numericMaximum: Integer
	//		Rightmost label value for generated numeric labels when labels[] are not specified
	maximum: 1,

	// constraints: Object
	//		pattern, places, lang, et al (see dojo.number) for generated numeric labels when labels[] are not specified
	constraints: {pattern:"#%"},

	_positionPrefix: '<div class="dijitRuleLabelContainer dijitRuleLabelContainerH" style="left:',
	_labelPrefix: '"><div class="dijitRuleLabel dijitRuleLabelH">',
	_suffix: '</div></div>',

	_calcPosition: function(pos){
		// summary:
		//		Returns the value to be used in HTML for the label as part of the left: attribute
		// tags:
		//		protected extension
		return pos;
	},

	_genHTML: function(pos, ndx){
		return this._positionPrefix + this._calcPosition(pos) + this._positionSuffix + this.labelStyle + this._labelPrefix + this.labels[ndx] + this._suffix;
	},

	getLabels: function(){
		// summary:
		//		Overridable function to return array of labels to use for this slider.
		//		Can specify a getLabels() method instead of a labels[] array, or min/max attributes.
		// tags:
		//		protected extension

		// if the labels array was not specified directly, then see if <li> children were
		var labels = this.labels;
		if(!labels.length){
			// for markup creation, labels are specified as child elements
			labels = dojo.query("> li", this.srcNodeRef).map(function(node){
				return String(node.innerHTML);
			});
		}
		this.srcNodeRef.innerHTML = '';
		// if the labels were not specified directly and not as <li> children, then calculate numeric labels
		if(!labels.length && this.count > 1){
			var start = this.minimum;
			var inc = (this.maximum - start) / (this.count-1);
			for(var i=0; i < this.count; i++){
				labels.push((i < this.numericMargin || i >= (this.count-this.numericMargin)) ? '' : dojo.number.format(start, this.constraints));
				start += inc;
			}
		}
		return labels;
	},

	postMixInProperties: function(){
		this.inherited(arguments);
		this.labels = this.getLabels();
		this.count = this.labels.length;
	}
});


