122 lines
3.3 KiB
JavaScript
122 lines
3.3 KiB
JavaScript
'use strict';
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/*@
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Ox.OptionGroup <f> OptionGroup
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Helper object, used by ButtonGroup, CheckboxGroup, Select and Menu
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(items, min, max, property) -> <f> OptionGroup
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items <a> array of items
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min <n> minimum number of selected items
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max <n> maximum number of selected items
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property <s|'checked'> property to check
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@*/
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Ox.OptionGroup = function(items, min, max, property) {
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var length = items.length;
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property = property || 'checked';
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max = max == -1 ? length : max;
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function getLastBefore(pos) {
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// returns the position of the last checked item before position pos
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var last = -1;
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// fixme: why is length not == items.length here?
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Ox.forEach([].concat(
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pos > 0 ? Ox.range(pos - 1, -1, -1) : [],
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pos < items.length - 1 ? Ox.range(items.length - 1, pos, -1) : []
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), function(v) {
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if (items[v][property]) {
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last = v;
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Ox.Break();
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}
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});
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return last;
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}
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function getNumber() {
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// returns the number of checked items
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return items.reduce(function(prev, curr) {
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return prev + !!curr[property];
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}, 0);
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}
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/*@
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[property] <f> returns an array with the positions of all checked items
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() -> <a> positions of checked items
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@*/
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// FIXME: isn't value more useful in all cases?
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this[property] = function() {
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return Ox.indicesOf(items, function(item) {
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return item[property];
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});
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};
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/*@
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init <f> init group
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() -> <a> returns items
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@*/
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this.init = function() {
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var num = getNumber(),
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count = 0;
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//if (num < min || num > max) {
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items.forEach(function(item) {
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if (Ox.isUndefined(item[property])) {
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item[property] = false;
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}
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if (item[property]) {
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count++;
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if (count > max) {
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item[property] = false;
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}
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} else {
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if (num < min) {
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item[property] = true;
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num++;
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}
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}
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});
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//}
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return items;
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};
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/*@
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toggle <f> toggle options
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(pos) -> <a> returns toggled state
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@*/
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this.toggle = function(pos) {
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var last,
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num = getNumber(),
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toggled = [];
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if (!items[pos][property]) { // check
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if (num >= max) {
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last = getLastBefore(pos);
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items[last][property] = false;
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toggled.push(last);
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}
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if (!items[pos][property]) {
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items[pos][property] = true;
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toggled.push(pos);
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}
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} else { // uncheck
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if (num > min) {
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items[pos][property] = false;
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toggled.push(pos);
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}
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}
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return toggled;
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}
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/*@
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value <f> get value
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@*/
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this.value = function() {
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var value = items.filter(function(item) {
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return item[property];
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}).map(function(item) {
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return item.id;
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});
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return max == 1 ? (value.length ? value[0] : '') : value;
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};
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return this;
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}
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