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