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/*global SelectBox, addEvent, gettext, interpolate, quickElement, SelectFilter*/
/*
SelectFilter2 - Turns a multiple-select box into a filter interface.
Requires jQuery, core.js, and SelectBox.js.
*/
(function($) {
'use strict';
function findForm(node) {
// returns the node of the form containing the given node
if (node.tagName.toLowerCase() !== 'form') {
return findForm(node.parentNode);
}
return node;
}
window.SelectFilter = {
init: function(field_id, field_name, is_stacked) {
if (field_id.match(/__prefix__/)) {
// Don't initialize on empty forms.
return;
}
var from_box = document.getElementById(field_id);
from_box.id += '_from'; // change its ID
from_box.className = 'filtered';
var ps = from_box.parentNode.getElementsByTagName('p');
for (var i = 0; i < ps.length; i++) {
if (ps[i].className.indexOf("info") !== -1) {
// Remove <p class="info">, because it just gets in the way.
from_box.parentNode.removeChild(ps[i]);
} else if (ps[i].className.indexOf("help") !== -1) {
// Move help text up to the top so it isn't below the select
// boxes or wrapped off on the side to the right of the add
// button:
from_box.parentNode.insertBefore(ps[i], from_box.parentNode.firstChild);
}
}
// <div class="selector"> or <div class="selector stacked">
var selector_div = quickElement('div', from_box.parentNode);
selector_div.className = is_stacked ? 'selector stacked' : 'selector';
// <div class="selector-available">
var selector_available = quickElement('div', selector_div);
selector_available.className = 'selector-available';
var title_available = quickElement('h2', selector_available, interpolate(gettext('Available %s') + ' ', [field_name]));
quickElement(
'span', title_available, '',
'class', 'help help-tooltip help-icon',
'title', interpolate(
gettext(
'This is the list of available %s. You may choose some by ' +
'selecting them in the box below and then clicking the ' +
'"Choose" arrow between the two boxes.'
),
[field_name]
)
);
var filter_p = quickElement('p', selector_available, '', 'id', field_id + '_filter');
filter_p.className = 'selector-filter';
var search_filter_label = quickElement('label', filter_p, '', 'for', field_id + '_input');
quickElement(
'span', search_filter_label, '',
'class', 'help-tooltip search-label-icon',
'title', interpolate(gettext("Type into this box to filter down the list of available %s."), [field_name])
);
filter_p.appendChild(document.createTextNode(' '));
var filter_input = quickElement('input', filter_p, '', 'type', 'text', 'placeholder', gettext("Filter"));
filter_input.id = field_id + '_input';
selector_available.appendChild(from_box);
var choose_all = quickElement('a', selector_available, gettext('Choose all'), 'title', interpolate(gettext('Click to choose all %s at once.'), [field_name]), 'href', '#', 'id', field_id + '_add_all_link');
choose_all.className = 'selector-chooseall';
// <ul class="selector-chooser">
var selector_chooser = quickElement('ul', selector_div);
selector_chooser.className = 'selector-chooser';
var add_link = quickElement('a', quickElement('li', selector_chooser), gettext('Choose'), 'title', gettext('Choose'), 'href', '#', 'id', field_id + '_add_link');
add_link.className = 'selector-add';
var remove_link = quickElement('a', quickElement('li', selector_chooser), gettext('Remove'), 'title', gettext('Remove'), 'href', '#', 'id', field_id + '_remove_link');
remove_link.className = 'selector-remove';
// <div class="selector-chosen">
var selector_chosen = quickElement('div', selector_div);
selector_chosen.className = 'selector-chosen';
var title_chosen = quickElement('h2', selector_chosen, interpolate(gettext('Chosen %s') + ' ', [field_name]));
quickElement(
'span', title_chosen, '',
'class', 'help help-tooltip help-icon',
'title', interpolate(
gettext(
'This is the list of chosen %s. You may remove some by ' +
'selecting them in the box below and then clicking the ' +
'"Remove" arrow between the two boxes.'
),
[field_name]
)
);
var to_box = quickElement('select', selector_chosen, '', 'id', field_id + '_to', 'multiple', 'multiple', 'size', from_box.size, 'name', from_box.getAttribute('name'));
to_box.className = 'filtered';
var clear_all = quickElement('a', selector_chosen, gettext('Remove all'), 'title', interpolate(gettext('Click to remove all chosen %s at once.'), [field_name]), 'href', '#', 'id', field_id + '_remove_all_link');
clear_all.className = 'selector-clearall';
from_box.setAttribute('name', from_box.getAttribute('name') + '_old');
// Set up the JavaScript event handlers for the select box filter interface
var move_selection = function(e, elem, move_func, from, to) {
if (elem.className.indexOf('active') !== -1) {
move_func(from, to);
SelectFilter.refresh_icons(field_id);
}
e.preventDefault();
};
addEvent(choose_all, 'click', function(e) { move_selection(e, this, SelectBox.move_all, field_id + '_from', field_id + '_to'); });
addEvent(add_link, 'click', function(e) { move_selection(e, this, SelectBox.move, field_id + '_from', field_id + '_to'); });
addEvent(remove_link, 'click', function(e) { move_selection(e, this, SelectBox.move, field_id + '_to', field_id + '_from'); });
addEvent(clear_all, 'click', function(e) { move_selection(e, this, SelectBox.move_all, field_id + '_to', field_id + '_from'); });
addEvent(filter_input, 'keypress', function(e) { SelectFilter.filter_key_press(e, field_id); });
addEvent(filter_input, 'keyup', function(e) { SelectFilter.filter_key_up(e, field_id); });
addEvent(filter_input, 'keydown', function(e) { SelectFilter.filter_key_down(e, field_id); });
addEvent(selector_div, 'change', function(e) {
if (e.target.tagName === 'SELECT') {
SelectFilter.refresh_icons(field_id);
}
});
addEvent(selector_div, 'dblclick', function(e) {
if (e.target.tagName === 'OPTION') {
if (e.target.closest('select').id === field_id + '_to') {
SelectBox.move(field_id + '_to', field_id + '_from');
} else {
SelectBox.move(field_id + '_from', field_id + '_to');
}
SelectFilter.refresh_icons(field_id);
}
});
addEvent(findForm(from_box), 'submit', function() { SelectBox.select_all(field_id + '_to'); });
SelectBox.init(field_id + '_from');
SelectBox.init(field_id + '_to');
// Move selected from_box options to to_box
SelectBox.move(field_id + '_from', field_id + '_to');
if (!is_stacked) {
// In horizontal mode, give the same height to the two boxes.
var j_from_box = $(from_box);
var j_to_box = $(to_box);
var resize_filters = function() { j_to_box.height($(filter_p).outerHeight() + j_from_box.outerHeight()); };
if (j_from_box.outerHeight() > 0) {
resize_filters(); // This fieldset is already open. Resize now.
} else {
// This fieldset is probably collapsed. Wait for its 'show' event.
j_to_box.closest('fieldset').one('show.fieldset', resize_filters);
}
}
// Initial icon refresh
SelectFilter.refresh_icons(field_id);
},
any_selected: function(field) {
var any_selected = false;
try {
// Temporarily add the required attribute and check validity.
// This is much faster in WebKit browsers than the fallback.
field.attr('required', 'required');
any_selected = field.is(':valid');
field.removeAttr('required');
} catch (e) {
// Browsers that don't support :valid (IE < 10)
any_selected = field.find('option:selected').length > 0;
}
return any_selected;
},
refresh_icons: function(field_id) {
var from = $('#' + field_id + '_from');
var to = $('#' + field_id + '_to');
// Active if at least one item is selected
$('#' + field_id + '_add_link').toggleClass('active', SelectFilter.any_selected(from));
$('#' + field_id + '_remove_link').toggleClass('active', SelectFilter.any_selected(to));
// Active if the corresponding box isn't empty
$('#' + field_id + '_add_all_link').toggleClass('active', from.find('option').length > 0);
$('#' + field_id + '_remove_all_link').toggleClass('active', to.find('option').length > 0);
},
filter_key_press: function(event, field_id) {
var from = document.getElementById(field_id + '_from');
// don't submit form if user pressed Enter
if ((event.which && event.which === 13) || (event.keyCode && event.keyCode === 13)) {
from.selectedIndex = 0;
SelectBox.move(field_id + '_from', field_id + '_to');
from.selectedIndex = 0;
event.preventDefault();
return false;
}
},
filter_key_up: function(event, field_id) {
var from = document.getElementById(field_id + '_from');
var temp = from.selectedIndex;
SelectBox.filter(field_id + '_from', document.getElementById(field_id + '_input').value);
from.selectedIndex = temp;
return true;
},
filter_key_down: function(event, field_id) {
var from = document.getElementById(field_id + '_from');
// right arrow -- move across
if ((event.which && event.which === 39) || (event.keyCode && event.keyCode === 39)) {
var old_index = from.selectedIndex;
SelectBox.move(field_id + '_from', field_id + '_to');
from.selectedIndex = (old_index === from.length) ? from.length - 1 : old_index;
return false;
}
// down arrow -- wrap around
if ((event.which && event.which === 40) || (event.keyCode && event.keyCode === 40)) {
from.selectedIndex = (from.length === from.selectedIndex + 1) ? 0 : from.selectedIndex + 1;
}
// up arrow -- wrap around
if ((event.which && event.which === 38) || (event.keyCode && event.keyCode === 38)) {
from.selectedIndex = (from.selectedIndex === 0) ? from.length - 1 : from.selectedIndex - 1;
}
return true;
}
};
addEvent(window, 'load', function(e) {
$('select.selectfilter, select.selectfilterstacked').each(function() {
var $el = $(this),
data = $el.data();
SelectFilter.init($el.attr('id'), data.fieldName, parseInt(data.isStacked, 10));
});
});
})(django.jQuery);
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