Proyectos de Subversion Moodle

/**

 * Provides the Calendar class.

 *

 * @module moodle-form-dateselector

 */

/**

 * Calendar class

 */

CALENDAR = function() {

    CALENDAR.superclass.constructor.apply(this, arguments);

};

CALENDAR.prototype = {

    panel: null,

    yearselect: null,

    monthselect: null,

    dayselect: null,

    calendarimage: null,

    enablecheckbox: null,

    closepopup: true,

    initializer: function() {

        var controls = this.get('node').all('select');

        controls.each(function(node) {

            if (node.get('name').match(/\[year\]/)) {

                this.yearselect = node;

            } else if (node.get('name').match(/\[month\]/)) {

                this.monthselect = node;

            } else if (node.get('name').match(/\[day\]/)) {

                this.dayselect = node;

            }

            node.after('change', this.handle_select_change, this);

        }, this);

        // Loop through the input fields.

        var inputs = this.get('node').all('input, a');

        inputs.each(function(node) {

            // Check if the current node is a calendar image field.

            if (node.get('name').match(/\[calendar\]/)) {

                // Set it so that when the image is clicked the pop-up displays.

                node.on('click', this.focus_event, this);

                // Set the node to the calendarimage variable.

                this.calendarimage = node;

            } else { // Must be the enabled checkbox field.

                // If the enable checkbox is clicked we want to either disable/enable the calendar image.

                node.on('click', this.toggle_calendar_image, this);

                // Set the node to the enablecheckbox variable.

                this.enablecheckbox = node;

            }

            // Ensure that the calendarimage and enablecheckbox values have been set.

            if (this.calendarimage && this.enablecheckbox) {

                // Set the calendar icon status depending on the value of the checkbox.

                this.toggle_calendar_image();

            }

        }, this);

        // Get the calendarimage element by its ID and check if any of its parents have the modal-dialog class to

        // know if the link is inside a modal, if so, set the aria-hidden and tabindex properties to the indicated values.

        var calendarimageelement = document.getElementById(this.calendarimage.get('id'));

        if (calendarimageelement.closest('.modal-dialog')) {

            this.calendarimage.set('aria-hidden', true);

            this.calendarimage.set('tabIndex', '-1');

        }

    },

    focus_event: function(e) {

        M.form.dateselector.cancel_any_timeout();

        // If the current owner is set, then the pop-up is currently being displayed, so hide it.

        if (M.form.dateselector.currentowner === this) {

            this.release_calendar();

        } else if ((this.enablecheckbox === null)

            || (this.enablecheckbox.get('checked'))) { // Must be hidden. If the field is enabled display the pop-up.

            this.claim_calendar();

        }

        // Stop the input image field from submitting the form.

        e.preventDefault();

    },

    handle_select_change: function() {

        // It may seem as if the following variable is not used, however any call to set_date_from_selects will trigger a

        // call to set_selects_from_date if the calendar is open as the date has changed. Whenever the calendar is displayed

        // the set_selects_from_date function is set to trigger on any date change (see function connect_handlers).

        this.closepopup = false;

        this.set_date_from_selects();

        this.closepopup = true;

    },

    claim_calendar: function() {

        M.form.dateselector.cancel_any_timeout();

        if (M.form.dateselector.currentowner === this) {

            return;

        }

        if (M.form.dateselector.currentowner) {

            M.form.dateselector.currentowner.release_calendar();

        }

        if (M.form.dateselector.currentowner !== this) {

            this.connect_handlers();

            this.set_date_from_selects();

        }

        M.form.dateselector.currentowner = this;

        M.form.dateselector.calendar.set('minimumDate', new Date(this.yearselect.firstOptionValue(), 0, 1));

        M.form.dateselector.calendar.set('maximumDate', new Date(this.yearselect.lastOptionValue(), 11, 31));

        M.form.dateselector.panel.show();

        M.form.dateselector.calendar.show();

        M.form.dateselector.fix_position();

        setTimeout(function() {

            M.form.dateselector.cancel_any_timeout();

        }, 100);

        // Focus on the calendar.

        M.form.dateselector.calendar.focus();

        // When the user tab out the calendar, close it.

        Y.one(document.body).on('keyup', function(e) {

            // If the calendar is open and we try to access it by pressing tab, we check if it is inside a Bootstrap dropdown-menu,

            // if so, we keep the dropdown open while navigation takes place in the calendar.

            if (M.form.dateselector.currentowner && e.keyCode === 9) {

                e.stopPropagation();

                var calendarimageelement = document.getElementById(M.form.dateselector.currentowner.calendarimage.get('id'));

                if (M.form.dateselector.calendar.get('focused') && calendarimageelement.closest('.dropdown-menu') &&

                    !calendarimageelement.closest('.dropdown-menu').classList.contains("show")) {

                    calendarimageelement.closest('.dropdown-menu').classList.add('show');

                }

            }

            // hide the calendar if we press a key and the calendar is not focussed, or if we press ESC in the calendar.

            if ((M.form.dateselector.currentowner === this && !M.form.dateselector.calendar.get('focused')) ||

                ((e.keyCode === 27) && M.form.dateselector.calendar.get('focused'))) {

                // Focus back on the calendar button.

                this.calendarimage.focus();

                this.release_calendar();

            }

        }, this);

    },

    set_date_from_selects: function() {

        var year = parseInt(this.yearselect.get('value'), 10);

        var month = parseInt(this.monthselect.get('value'), 10) - 1;

        var day = parseInt(this.dayselect.get('value'), 10);

        var date = new Date(year, month, day);

        M.form.dateselector.calendar.deselectDates();

        M.form.dateselector.calendar.selectDates([date]);

        M.form.dateselector.calendar.set("date", date);

        M.form.dateselector.calendar.render();

        if (date.getDate() !== day) {

            // Must've selected the 29 to 31st of a month that doesn't have such dates.

            this.dayselect.set('value', date.getDate());

            this.monthselect.set('value', date.getMonth() + 1);

        }

    },

    set_selects_from_date: function(ev) {

        var date = ev.newSelection[0];

        var newyear = Y.DataType.Date.format(date, {format: "%Y"});

        var newindex = newyear - this.yearselect.firstOptionValue();

        this.yearselect.set('selectedIndex', newindex);

        this.monthselect.set('selectedIndex', Y.DataType.Date.format(date, {format: "%m"}) - this.monthselect.firstOptionValue());

        this.dayselect.set('selectedIndex', Y.DataType.Date.format(date, {format: "%d"}) - this.dayselect.firstOptionValue());

        if (M.form.dateselector.currentowner && this.closepopup) {

            this.release_calendar();

        }

    },

    connect_handlers: function() {

        M.form.dateselector.calendar.on('selectionChange', this.set_selects_from_date, this, true);

    },

    release_calendar: function(e) {

        var wasOwner = M.form.dateselector.currentowner === this;

        M.form.dateselector.panel.hide();

        M.form.dateselector.calendar.detach('selectionChange', this.set_selects_from_date);

        M.form.dateselector.calendar.hide();

        M.form.dateselector.currentowner = null;

        // Put the focus back to the image calendar that we clicked, only if it was visible.

        if (wasOwner && (e === null || typeof e === "undefined" || e.type !== "click")) {

            this.calendarimage.focus();

        }

    },

    toggle_calendar_image: function() {

        // If the enable checkbox is not checked, disable the calendar image and prevent focus.

        if (!this.enablecheckbox.get('checked')) {

            this.calendarimage.addClass('disabled');

            this.release_calendar();

        } else {

            this.calendarimage.removeClass('disabled');

        }

    }

};

Y.extend(CALENDAR, Y.Base, CALENDAR.prototype, {

    NAME: 'Date Selector',

    ATTRS: {

        firstdayofweek: {

            validator: Y.Lang.isString

        },

        node: {

            setter: function(node) {

                return Y.one(node);

            }

        }

    }

});