google_address_autocomplete.js

/*========================================================
GOOGLE ADDRESS AUTOCOMPLETE
========================================================*/
$(function(){
	var autocomplete,
		input = $('#shipping-line1');
		
	// Only IE 9+
	if ($.browser.msie && $.browser.version.substr(0,1) < 10)
		return false;
	
	// Create the autocomplete object, restricting the search to geographical location types.
	autocomplete = new google.maps.places.Autocomplete(input[0], {
		types: ['address'],
		componentRestrictions: {country: 'us'}
	});

	// When the user selects an address from the dropdown, populate the address fields in the form.
	autocomplete.addListener('place_changed', fillInAddress);

	function fillInAddress() {
		// Get the place details from the autocomplete object.
		var place = autocomplete.getPlace(),
			components = place.address_components;

		// Function to find an address component by type and short_name/long_name
		var find = function (type, name) {
			if (typeof name === 'undefined')
				name = 'short_name';
			var component = components.filter(function(obj) {
				return $.inArray(type, obj['types']) !== -1;
			});

			if (component.length > 0) {
				return component[0][name];
			}
			return '';
		};

		// Result MUST have a street_number
		var street_number = find('street_number');
		if (!street_number || street_number === '') {
			// HERE'S THE HACK:
			// Sometimes Google doesn't return street_number field, but address is correct in the auto-completer
			// Use the value from autocomplete to get the street address
			street_number = input.val().split(',')[0];
		}
		else {
			// has street number, append route for full street address
			street_number += ' ' + find('route');
		}
		
		// Trim street address
		street_number = $.trim(street_number);

		// Autocomplete shipping address fields
		input.val(street_number);
		$('#shipping-city').val(find('locality', 'long_name'));
		$('#shipping-state').val(find('administrative_area_level_1'));
		$('#shipping-zip').val((find('postal_code') + '-' + find('postal_code_suffix')).replace(/-\s*$/, ''));

		// Phone number?
		if (place.formatted_phone_number)
			$('#shipping-phone').val(place.formatted_phone_number);

		// Company name?
		if (place.types && place.name && $.inArray('establishment', place.types) !== -1)
			$('#shipping-company').val(place.name);

		// Clear and auto-focus on line 2
		$('#shipping-line2').val('').focus();
	}
});