root / drupal7 / sites / all / modules / date / date_api / date_year_range.js @ a84ddea4
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(function ($) { |
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Drupal.behaviors.dateYearRange = {}; |
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Drupal.behaviors.dateYearRange.attach = function (context, settings) { |
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var $textfield, $textfields, i; |
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// Turn the years back and forward fieldsets into dropdowns.
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$textfields = $('input.select-list-with-custom-option', context).once('date-year-range'); |
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for (i = 0; i < $textfields.length; i++) { |
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$textfield = $($textfields[i]); |
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new Drupal.dateYearRange.SelectListWithCustomOption($textfield); |
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} |
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}; |
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Drupal.dateYearRange = {}; |
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/**
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* Constructor for the SelectListWithCustomOption object.
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*
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* This object is responsible for turning the years back and forward textfields
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* into dropdowns with an 'other' option that lets the user enter a custom
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* value.
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*/
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Drupal.dateYearRange.SelectListWithCustomOption = function ($textfield) { |
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this.$textfield = $textfield; |
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this.$description = $textfield.next('div.description'); |
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this.defaultValue = $textfield.val(); |
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this.$dropdown = this.createDropdown(); |
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this.$dropdown.insertBefore($textfield); |
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}; |
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/**
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* Get the value of the textfield as it existed on page load.
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*
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* @param {String} type
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* The type of the variable to be returned. Defaults to string.
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* @return
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* The original value of the textfield. Returned as an integer, if the type
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* parameter was 'int'.
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*/
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Drupal.dateYearRange.SelectListWithCustomOption.prototype.getOriginal = function (type) { |
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var original;
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if (type === 'int') { |
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original = parseInt(this.defaultValue, 10); |
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if (window.isNaN(original)) {
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original = 0;
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} |
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} |
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else {
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original = this.defaultValue;
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} |
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return original;
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}; |
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/**
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* Get the correct first value for the dropdown.
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*/
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Drupal.dateYearRange.SelectListWithCustomOption.prototype.getStartValue = function () { |
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var direction = this.getDirection(); |
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var start;
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switch (direction) {
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case 'back': |
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// For the 'years back' dropdown, the first option should be -10, unless
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// the default value of the textfield is even smaller than that.
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start = Math.min(this.getOriginal('int'), -10); |
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break;
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case 'forward': |
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start = 0;
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break;
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} |
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return start;
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}; |
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/**
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* Get the correct last value for the dropdown.
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*/
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Drupal.dateYearRange.SelectListWithCustomOption.prototype.getEndValue = function () { |
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var direction = this.getDirection(); |
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var end;
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var originalString = this.getOriginal(); |
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switch (direction) {
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case 'back': |
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end = 0;
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break;
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case 'forward': |
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// If the original value of the textfield is an absolute year such as
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// 2020, don't try to include it in the dropdown.
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if (originalString.indexOf('+') === -1) { |
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end = 10;
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} |
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// If the original value is a relative value (+x), we want it to be
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// included in the possible dropdown values.
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else {
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end = Math.max(this.getOriginal('int'), 10); |
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} |
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break;
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} |
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return end;
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}; |
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/**
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* Create a dropdown select list with the correct options for this textfield.
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*/
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Drupal.dateYearRange.SelectListWithCustomOption.prototype.createDropdown = function () { |
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var $dropdown = $('<select>').addClass('form-select date-year-range-select'); |
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var $option, i, value; |
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var start = this.getStartValue(); |
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var end = this.getEndValue(); |
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var direction = this.getDirection(); |
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for (i = start; i <= end; i++) {
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// Make sure we include the +/- sign in the option value.
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value = i; |
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if (i > 0) { |
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value = '+' + i;
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} |
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// Zero values must have a + or - in front.
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if (i === 0) { |
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if (direction === 'back') { |
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value = '-' + i;
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} |
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else {
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value = '+' + i;
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} |
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} |
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$option = $('<option>' + Drupal.formatPlural(value, '@count year from now', '@count years from now') + '</option>').val(value); |
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$dropdown.append($option); |
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} |
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// Create an 'Other' option.
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$option = $('<option class="custom-option">' + Drupal.t('Other') + '</option>').val(''); |
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$dropdown.append($option); |
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// When the user changes the selected option in the dropdown, perform
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// appropriate actions (such as showing or hiding the textfield).
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$dropdown.bind('change', $.proxy(this.handleDropdownChange, this)); |
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// Set the initial value of the dropdown.
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this._setInitialDropdownValue($dropdown); |
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return $dropdown; |
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}; |
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Drupal.dateYearRange.SelectListWithCustomOption.prototype._setInitialDropdownValue = function ($dropdown) { |
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var textfieldValue = this.getOriginal(); |
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// Determine whether the original textfield value exists in the dropdown.
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var possible = $dropdown.find('option[value="' + textfieldValue + '"]'); |
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// If the original textfield value is one of the dropdown options, preselect
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// it and hide the 'other' textfield.
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if (possible.length) {
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$dropdown.val(textfieldValue);
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this.hideTextfield();
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} |
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// If the original textfield value isn't one of the dropdown options, choose
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// the 'Other' option in the dropdown.
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else {
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$dropdown.val(''); |
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} |
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}; |
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/**
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* Determine whether this is the "years back" or "years forward" textfield.
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*/
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Drupal.dateYearRange.SelectListWithCustomOption.prototype.getDirection = function () { |
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if (this.direction) { |
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return this.direction; |
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} |
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var direction;
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if (this.$textfield.hasClass('back')) { |
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direction = 'back';
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} |
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else if (this.$textfield.hasClass('forward')) { |
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direction = 'forward';
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} |
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this.direction = direction;
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return direction;
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}; |
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/**
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* Change handler for the dropdown, to modify the textfield as appropriate.
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*/
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Drupal.dateYearRange.SelectListWithCustomOption.prototype.handleDropdownChange = function () { |
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// Since the dropdown changed, we need to make the content of the textfield
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// match the (new) selected option.
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this.syncTextfield();
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// Show the textfield if the 'Other' option was selected, and hide it if one
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// of the preset options was selected.
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if ($(':selected', this.$dropdown).hasClass('custom-option')) { |
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this.revealTextfield();
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} |
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else {
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this.hideTextfield();
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} |
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}; |
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/**
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* Display the textfield and its description.
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*/
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Drupal.dateYearRange.SelectListWithCustomOption.prototype.revealTextfield = function () { |
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this.$textfield.show(); |
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this.$description.show(); |
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}; |
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/**
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* Hide the textfield and its description.
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*/
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Drupal.dateYearRange.SelectListWithCustomOption.prototype.hideTextfield = function () { |
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this.$textfield.hide(); |
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this.$description.hide(); |
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}; |
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/**
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* Copy the selected value of the dropdown to the textfield.
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*
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* FAPI doesn't know about the JS-only dropdown, so the textfield needs to
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* reflect the value of the dropdown.
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*/
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Drupal.dateYearRange.SelectListWithCustomOption.prototype.syncTextfield = function () { |
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var value = this.$dropdown.val(); |
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this.$textfield.val(value); |
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}; |
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})(jQuery); |