/*global $, window*/
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$.fn.editableTableWidget = function (options) {
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'use strict';
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return $(this).each(function () {
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var buildDefaultOptions = function () {
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var opts = $.extend({}, $.fn.editableTableWidget.defaultOptions);
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opts.editor = opts.editor.clone();
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return opts;
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},
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activeOptions = $.extend(buildDefaultOptions(), options),
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ARROW_LEFT = 37, ARROW_UP = 38, ARROW_RIGHT = 39, ARROW_DOWN = 40, ENTER = 13, ESC = 27, TAB = 9,
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element = $(this),
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editor = activeOptions.editor.css('position', 'absolute').hide().appendTo(element.parent()),
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active,
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showEditor = function (select) {
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active = element.find('td:focus');
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if (active.length) {
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editor.val(active.text())
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.removeClass('error')
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.show()
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.offset(active.offset())
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.css(active.css(activeOptions.cloneProperties))
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.width(active.width())
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.height(active.height())
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.focus();
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if (select) {
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editor.select();
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}
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}
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},
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setActiveText = function () {
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var text = editor.val(),
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evt = $.Event('change'),
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originalContent;
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if (active.text() === text || editor.hasClass('error')) {
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return true;
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}
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originalContent = active.html();
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active.text(text).trigger(evt, text);
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if (evt.result === false) {
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active.html(originalContent);
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}
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},
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movement = function (element, keycode) {
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if (keycode === ARROW_RIGHT) {
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return element.next('td');
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} else if (keycode === ARROW_LEFT) {
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return element.prev('td');
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} else if (keycode === ARROW_UP) {
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return element.parent().prev().children().eq(element.index());
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} else if (keycode === ARROW_DOWN) {
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return element.parent().next().children().eq(element.index());
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}
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return [];
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};
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editor.blur(function () {
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setActiveText();
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editor.hide();
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}).keydown(function (e) {
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if (e.which === ENTER) {
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setActiveText();
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editor.hide();
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active.focus();
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e.preventDefault();
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e.stopPropagation();
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} else if (e.which === ESC) {
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editor.val(active.text());
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e.preventDefault();
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e.stopPropagation();
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editor.hide();
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active.focus();
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} else if (e.which === TAB) {
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active.focus();
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} else if (this.selectionEnd - this.selectionStart === this.value.length) {
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var possibleMove = movement(active, e.which);
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if (possibleMove.length > 0) {
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possibleMove.focus();
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e.preventDefault();
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e.stopPropagation();
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}
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}
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})
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.on('input paste', function () {
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var evt = $.Event('validate');
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active.trigger(evt, editor.val());
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if (evt.result === false) {
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editor.addClass('error');
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} else {
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editor.removeClass('error');
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}
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});
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element.on('click keypress dblclick', showEditor)
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.css('cursor', 'pointer')
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.keydown(function (e) {
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var prevent = true,
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possibleMove = movement($(e.target), e.which);
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if (possibleMove.length > 0) {
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possibleMove.focus();
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} else if (e.which === ENTER) {
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showEditor(false);
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} else if (e.which === 17 || e.which === 91 || e.which === 93) {
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showEditor(true);
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prevent = false;
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} else {
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prevent = false;
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}
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if (prevent) {
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e.stopPropagation();
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e.preventDefault();
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}
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});
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element.find('td').prop('tabindex', 1);
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$(window).on('resize', function () {
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if (editor.is(':visible')) {
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editor.offset(active.offset())
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.width(active.width())
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.height(active.height());
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}
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});
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});
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};
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$.fn.editableTableWidget.defaultOptions = {
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cloneProperties: ['padding', 'padding-top', 'padding-bottom', 'padding-left', 'padding-right',
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'text-align', 'font', 'font-size', 'font-family', 'font-weight',
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'border', 'border-top', 'border-bottom', 'border-left', 'border-right'],
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editor: $('<input>')
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};
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