morebits.js

// <nowiki>
/**
 * morebits.js
 * ===========
 * A library full of lots of goodness for user scripts on MediaWiki wikis, including Wikipedia.
 *
 * The highlights include:
 *   - Morebits.quickForm class - generates quick HTML forms on the fly
 *   - Morebits.wiki.api class - makes calls to the MediaWiki API
 *   - Morebits.wiki.page class - modifies pages on the wiki (edit, revert, delete, etc.)
 *   - Morebits.wikitext class - contains some utilities for dealing with wikitext
 *   - Morebits.status class - a rough-and-ready status message displayer, used by the Morebits.wiki classes
 *   - Morebits.simpleWindow class - a wrapper for jQuery UI Dialog with a custom look and extra features
 *
 * Dependencies:
 *   - The whole thing relies on jQuery.  But most wikis should provide this by default.
 *   - Morebits.quickForm, Morebits.simpleWindow, and Morebits.status rely on the "morebits.css" file for their styling.
 *   - Morebits.simpleWindow relies on jquery UI Dialog (ResourceLoader module name 'jquery.ui').
 *   - Morebits.quickForm tooltips rely on Tipsy (ResourceLoader module name 'jquery.tipsy').
 *     For external installations, Tipsy is available at [http://onehackoranother.com/projects/jquery/tipsy].
 *   - To create a gadget based on morebits.js, use this syntax in MediaWiki:Gadgets-definition:
 *       * GadgetName[ResourceLoader|dependencies=mediawiki.user,mediawiki.util,jquery.ui,jquery.tipsy]|morebits.js|morebits.css|GadgetName.js
 *
 * Most of the stuff here doesn't work on IE < 9.  It is your script's responsibility to enforce this.
 *
 * This library is maintained by the maintainers of Twinkle.
 * For queries, suggestions, help, etc., head to [[Wikipedia talk:Twinkle]] on English Wikipedia [http://en.wikipedia.org].
 * The latest development source is available at [https://github.com/azatoth/twinkle/blob/master/morebits.js].
 */


(function (window, document, $, undefined) { // Wrap entire file with anonymous function

var Morebits = {};
window.Morebits = Morebits;  // allow global access



/**
 * **************** Morebits.userIsInGroup() ****************
 * Simple helper function to see what groups a user might belong
 */

Morebits.userIsInGroup = function (group) {
	return mw.config.get('wgUserGroups').indexOf(group) !== -1;
};



/**
 * **************** Morebits.sanitizeIPv6() ****************
 * JavaScript translation of the MediaWiki core function IP::sanitizeIP() in
 * includes/utils/IP.php.
 * Converts an IPv6 address to the canonical form stored and used by MediaWiki.
 */

Morebits.sanitizeIPv6 = function (address) {
	address = address.trim();
	if (address === '') {
		return null;
	}
	if (!mw.util.isIPv6Address(address)) {
		return address; // nothing else to do for IPv4 addresses or invalid ones
	}
	// Remove any whitespaces, convert to upper case
	address = address.toUpperCase();
	// Expand zero abbreviations
	var abbrevPos = address.indexOf('::');
	if (abbrevPos > -1) {
		// We know this is valid IPv6. Find the last index of the
		// address before any CIDR number (e.g. "a:b:c::/24").
		var CIDRStart = address.indexOf('/');
		var addressEnd = CIDRStart > -1 ? CIDRStart - 1 : address.length - 1;
		// If the '::' is at the beginning...
		var repeat, extra, pad;
		if (abbrevPos === 0) {
			repeat = '0:';
			extra = address == '::' ? '0' : ''; // for the address '::'
			pad = 9; // 7+2 (due to '::')
		// If the '::' is at the end...
		} else if (abbrevPos === (addressEnd - 1)) {
			repeat = ':0';
			extra = '';
			pad = 9; // 7+2 (due to '::')
		// If the '::' is in the middle...
		} else {
			repeat = ':0';
			extra = ':';
			pad = 8; // 6+2 (due to '::')
		}
		var replacement = repeat;
		pad -= address.split(':').length - 1;
		for (var i = 1; i < pad; i++) {
			replacement += repeat;
		}
		replacement += extra;
		address = address.replace('::', replacement);
	}
	// Remove leading zeros from each bloc as needed
	address = address.replace(/(^|:)0+([0-9A-Fa-f]{1,4})/g, '$1$2');

	return address;
};



/**
 * **************** Morebits.quickForm ****************
 * Morebits.quickForm is a class for creation of simple and standard forms without much
 * specific coding.
 *
 * Index to Morebits.quickForm element types:
 *
 *   select    A combo box (aka drop-down).
 *              - Attributes: name, label, multiple, size, list, event
 *   option    An element for a combo box.
 *              - Attributes: value, label, selected, disabled
 *   optgroup  A group of "option"s.
 *              - Attributes: label, list
 *   field     A fieldset (aka group box).
 *              - Attributes: name, label, disabled
 *   checkbox  A checkbox. Must use "list" parameter.
 *              - Attributes: name, list, event
 *              - Attributes (within list): name, label, value, checked, disabled, event, subgroup
 *   radio     A radio button. Must use "list" parameter.
 *              - Attributes: name, list, event
 *              - Attributes (within list): name, label, value, checked, disabled, hidden, event, subgroup
 *   input     A text box.
 *              - Attributes: name, label, value, size, disabled, readonly, hidden, maxlength, event
 *   dyninput  A set of text boxes with "Remove" buttons and an "Add" button.
 *              - Attributes: name, label, min, max, sublabel, value, size, maxlength, event
 *   hidden    An invisible form field.
 *              - Attributes: name, value
 *   header    A level 5 header.
 *              - Attributes: label
 *   div       A generic placeholder element or label.
 *              - Attributes: name, label
 *   submit    A submit button. Morebits.simpleWindow moves these to the footer of the dialog.
 *              - Attributes: name, label, disabled
 *   button    A generic button.
 *              - Attributes: name, label, disabled, event
 *   textarea  A big, multi-line text box.
 *              - Attributes: name, label, value, cols, rows, disabled, readonly, hidden
 *   fragment  A DocumentFragment object.
 *              - No attributes, and no global attributes except adminonly
 *
 * Global attributes: id, className, style, tooltip, extra, adminonly
 */

Morebits.quickForm = function QuickForm(event, eventType) {
	this.root = new Morebits.quickForm.element({ type: 'form', event: event, eventType: eventType });
};

Morebits.quickForm.prototype.render = function QuickFormRender() {
	var ret = this.root.render();
	ret.names = {};
	return ret;
};

Morebits.quickForm.prototype.append = function QuickFormAppend(data) {
	return this.root.append(data);
};

Morebits.quickForm.element = function QuickFormElement(data) {
	this.data = data;
	this.childs = [];
	this.id = Morebits.quickForm.element.id++;
};

Morebits.quickForm.element.id = 0;

Morebits.quickForm.element.prototype.append = function QuickFormElementAppend(data) {
	var child;
	if (data instanceof Morebits.quickForm.element) {
		child = data;
	} else {
		child = new Morebits.quickForm.element(data);
	}
	this.childs.push(child);
	return child;
};

// This should be called without parameters: form.render()
Morebits.quickForm.element.prototype.render = function QuickFormElementRender(internal_subgroup_id) {
	var currentNode = this.compute(this.data, internal_subgroup_id);

	for (var i = 0; i < this.childs.length; ++i) {
		// do not pass internal_subgroup_id to recursive calls
		currentNode[1].appendChild(this.childs[i].render());
	}
	return currentNode[0];
};

Morebits.quickForm.element.prototype.compute = function QuickFormElementCompute(data, in_id) {
	var node;
	var childContainder = null;
	var label;
	var id = (in_id ? in_id + '_' : '') + 'node_' + this.id;
	if (data.adminonly && !Morebits.userIsInGroup('sysop')) {
		// hell hack alpha
		data.type = 'hidden';
	}

	var i, current, subnode;
	switch (data.type) {
		case 'form':
			node = document.createElement('form');
			node.className = 'quickform';
			node.setAttribute('action', 'javascript:void(0);');
			if (data.event) {
				node.addEventListener(data.eventType || 'submit', data.event, false);
			}
			break;
		case 'fragment':
			node = document.createDocumentFragment();
			// fragments can't have any attributes, so just return it straight away
			return [ node, node ];
		case 'select':
			node = document.createElement('div');

			node.setAttribute('id', 'div_' + id);
			if (data.label) {
				label = node.appendChild(document.createElement('label'));
				label.setAttribute('for', id);
				label.appendChild(document.createTextNode(data.label));
			}
			var select = node.appendChild(document.createElement('select'));
			if (data.event) {
				select.addEventListener('change', data.event, false);
			}
			if (data.multiple) {
				select.setAttribute('multiple', 'multiple');
			}
			if (data.size) {
				select.setAttribute('size', data.size);
			}
			select.setAttribute('name', data.name);

			if (data.list) {
				for (i = 0; i < data.list.length; ++i) {

					current = data.list[i];

					if (current.list) {
						current.type = 'optgroup';
					} else {
						current.type = 'option';
					}

					subnode = this.compute(current);
					select.appendChild(subnode[0]);
				}
			}
			childContainder = select;
			break;
		case 'option':
			node = document.createElement('option');
			node.values = data.value;
			node.setAttribute('value', data.value);
			if (data.selected) {
				node.setAttribute('selected', 'selected');
			}
			if (data.disabled) {
				node.setAttribute('disabled', 'disabled');
			}
			node.setAttribute('label', data.label);
			node.appendChild(document.createTextNode(data.label));
			break;
		case 'optgroup':
			node = document.createElement('optgroup');
			node.setAttribute('label', data.label);

			if (data.list) {
				for (i = 0; i < data.list.length; ++i) {

					current = data.list[i];
					current.type = 'option'; // must be options here

					subnode = this.compute(current);
					node.appendChild(subnode[0]);
				}
			}
			break;
		case 'field':
			node = document.createElement('fieldset');
			label = node.appendChild(document.createElement('legend'));
			label.appendChild(document.createTextNode(data.label));
			if (data.name) {
				node.setAttribute('name', data.name);
			}
			if (data.disabled) {
				node.setAttribute('disabled', 'disabled');
			}
			break;
		case 'checkbox':
		case 'radio':
			node = document.createElement('div');
			if (data.list) {
				for (i = 0; i < data.list.length; ++i) {
					var cur_id = id + '_' + i;
					current = data.list[i];
					var cur_div;
					if (current.type === 'header') {
					// inline hack
						cur_div = node.appendChild(document.createElement('h6'));
						cur_div.appendChild(document.createTextNode(current.label));
						if (current.tooltip) {
							Morebits.quickForm.element.generateTooltip(cur_div, current);
						}
						continue;
					}
					cur_div = node.appendChild(document.createElement('div'));
					if (current.hidden) {
						cur_div.setAttribute('hidden', '');
					}
					subnode = cur_div.appendChild(document.createElement('input'));
					subnode.values = current.value;
					subnode.setAttribute('value', current.value);
					subnode.setAttribute('name', current.name || data.name);
					subnode.setAttribute('type', data.type);
					subnode.setAttribute('id', cur_id);

					if (current.checked) {
						subnode.setAttribute('checked', 'checked');
					}
					if (current.disabled) {
						subnode.setAttribute('disabled', 'disabled');
					}
					label = cur_div.appendChild(document.createElement('label'));
					label.appendChild(document.createTextNode(current.label));
					label.setAttribute('for', cur_id);
					if (current.tooltip) {
						Morebits.quickForm.element.generateTooltip(label, current);
					}
					// styles go on the label, doesn't make sense to style a checkbox/radio
					if (current.style) {
						subnode.setAttribute('style', current.style);
					}

					var event;
					if (current.subgroup) {
						var tmpgroup = current.subgroup;

						if (!$.isArray(tmpgroup)) {
							tmpgroup = [ tmpgroup ];
						}

						var subgroupRaw = new Morebits.quickForm.element({
							type: 'div',
							id: id + '_' + i + '_subgroup'
						});
						$.each(tmpgroup, function(idx, el) {
							var newEl = $.extend({}, el);
							if (!newEl.type) {
								newEl.type = data.type;
							}
							newEl.name = (current.name || data.name) + '.' + newEl.name;
							subgroupRaw.append(newEl);
						});

						var subgroup = subgroupRaw.render(cur_id);
						subgroup.className = 'quickformSubgroup';
						subnode.subgroup = subgroup;
						subnode.shown = false;

						event = function(e) {
							if (e.target.checked) {
								e.target.parentNode.appendChild(e.target.subgroup);
								if (e.target.type === 'radio') {
									var name = e.target.name;
									if (e.target.form.names[name] !== undefined) {
										e.target.form.names[name].parentNode.removeChild(e.target.form.names[name].subgroup);
									}
									e.target.form.names[name] = e.target;
								}
							} else {
								e.target.parentNode.removeChild(e.target.subgroup);
							}
						};
						subnode.addEventListener('change', event, true);
						if (current.checked) {
							subnode.parentNode.appendChild(subgroup);
						}
					} else if (data.type === 'radio') {
						event = function(e) {
							if (e.target.checked) {
								var name = e.target.name;
								if (e.target.form.names[name] !== undefined) {
									e.target.form.names[name].parentNode.removeChild(e.target.form.names[name].subgroup);
								}
								delete e.target.form.names[name];
							}
						};
						subnode.addEventListener('change', event, true);
					}
					// add users' event last, so it can interact with the subgroup
					if (data.event) {
						subnode.addEventListener('change', data.event, false);
					} else if (current.event) {
						subnode.addEventListener('change', current.event, true);
					}
				}
			}
			break;
		case 'input':
			node = document.createElement('div');
			node.setAttribute('id', 'div_' + id);
			if (data.hidden) {
				node.setAttribute('hidden', '');
			}

			if (data.label) {
				label = node.appendChild(document.createElement('label'));
				label.appendChild(document.createTextNode(data.label));
				label.setAttribute('for', id);
			}

			subnode = node.appendChild(document.createElement('input'));
			if (data.value) {
				subnode.setAttribute('value', data.value);
			}
			subnode.setAttribute('name', data.name);
			subnode.setAttribute('id', id);
			subnode.setAttribute('type', 'text');
			if (data.size) {
				subnode.setAttribute('size', data.size);
			}
			if (data.disabled) {
				subnode.setAttribute('disabled', 'disabled');
			}
			if (data.readonly) {
				subnode.setAttribute('readonly', 'readonly');
			}
			if (data.maxlength) {
				subnode.setAttribute('maxlength', data.maxlength);
			}
			if (data.event) {
				subnode.addEventListener('keyup', data.event, false);
			}
			break;
		case 'dyninput':
			var min = data.min || 1;
			var max = data.max || Infinity;

			node = document.createElement('div');

			label = node.appendChild(document.createElement('h5'));
			label.appendChild(document.createTextNode(data.label));

			var listNode = node.appendChild(document.createElement('div'));

			var more = this.compute({
				type: 'button',
				label: '更多',
				disabled: min >= max,
				event: function(e) {
					var new_node = new Morebits.quickForm.element(e.target.sublist);
					e.target.area.appendChild(new_node.render());

					if (++e.target.counter >= e.target.max) {
						e.target.setAttribute('disabled', 'disabled');
					}
					e.stopPropagation();
				}
			});

			node.appendChild(more[0]);
			var moreButton = more[1];

			var sublist = {
				type: '_dyninput_element',
				label: data.sublabel || data.label,
				name: data.name,
				value: data.value,
				size: data.size,
				remove: false,
				maxlength: data.maxlength,
				event: data.event
			};

			for (i = 0; i < min; ++i) {
				var elem = new Morebits.quickForm.element(sublist);
				listNode.appendChild(elem.render());
			}
			sublist.remove = true;
			sublist.morebutton = moreButton;
			sublist.listnode = listNode;

			moreButton.sublist = sublist;
			moreButton.area = listNode;
			moreButton.max = max - min;
			moreButton.counter = 0;
			break;
		case '_dyninput_element': // Private, similar to normal input
			node = document.createElement('div');

			if (data.label) {
				label = node.appendChild(document.createElement('label'));
				label.appendChild(document.createTextNode(data.label));
				label.setAttribute('for', id);
			}

			subnode = node.appendChild(document.createElement('input'));
			if (data.value) {
				subnode.setAttribute('value', data.value);
			}
			subnode.setAttribute('name', data.name);
			subnode.setAttribute('type', 'text');
			if (data.size) {
				subnode.setAttribute('size', data.size);
			}
			if (data.maxlength) {
				subnode.setAttribute('maxlength', data.maxlength);
			}
			if (data.event) {
				subnode.addEventListener('keyup', data.event, false);
			}
			if (data.remove) {
				var remove = this.compute({
					type: 'button',
					label: '移除',
					event: function(e) {
						var list = e.target.listnode;
						var node = e.target.inputnode;
						var more = e.target.morebutton;

						list.removeChild(node);
						--more.counter;
						more.removeAttribute('disabled');
						e.stopPropagation();
					}
				});
				node.appendChild(remove[0]);
				var removeButton = remove[1];
				removeButton.inputnode = node;
				removeButton.listnode = data.listnode;
				removeButton.morebutton = data.morebutton;
			}
			break;
		case 'hidden':
			node = document.createElement('input');
			node.setAttribute('type', 'hidden');
			node.values = data.value;
			node.setAttribute('value', data.value);
			node.setAttribute('name', data.name);
			break;
		case 'header':
			node = document.createElement('h5');
			node.appendChild(document.createTextNode(data.label));
			break;
		case 'div':
			node = document.createElement('div');
			if (data.name) {
				node.setAttribute('name', data.name);
			}
			if (data.label) {
				if (!$.isArray(data.label)) {
					data.label = [ data.label ];
				}
				var result = document.createElement('span');
				result.className = 'quickformDescription';
				for (i = 0; i < data.label.length; ++i) {
					if (typeof data.label[i] === 'string') {
						result.appendChild(document.createTextNode(data.label[i]));
					} else if (data.label[i] instanceof Element) {
						result.appendChild(data.label[i]);
					}
				}
				node.appendChild(result);
			}
			break;
		case 'submit':
			node = document.createElement('span');
			childContainder = node.appendChild(document.createElement('input'));
			childContainder.setAttribute('type', 'submit');
			if (data.label) {
				childContainder.setAttribute('value', data.label);
			}
			childContainder.setAttribute('name', data.name || 'submit');
			if (data.disabled) {
				childContainder.setAttribute('disabled', 'disabled');
			}
			break;
		case 'button':
			node = document.createElement('span');
			childContainder = node.appendChild(document.createElement('input'));
			childContainder.setAttribute('type', 'button');
			if (data.label) {
				childContainder.setAttribute('value', data.label);
			}
			childContainder.setAttribute('name', data.name);
			if (data.disabled) {
				childContainder.setAttribute('disabled', 'disabled');
			}
			if (data.event) {
				childContainder.addEventListener('click', data.event, false);
			}
			break;
		case 'textarea':
			node = document.createElement('div');
			node.setAttribute('id', 'div_' + id);
			if (data.hidden) {
				node.setAttribute('hidden', '');
			}
			if (data.label) {
				label = node.appendChild(document.createElement('h5'));
				label.appendChild(document.createTextNode(data.label));
			// TODO need to nest a <label> tag in here without creating extra vertical space
			// label.setAttribute( 'for', id );
			}
			subnode = node.appendChild(document.createElement('textarea'));
			subnode.setAttribute('name', data.name);
			if (data.cols) {
				subnode.setAttribute('cols', data.cols);
			}
			if (data.rows) {
				subnode.setAttribute('rows', data.rows);
			}
			if (data.disabled) {
				subnode.setAttribute('disabled', 'disabled');
			}
			if (data.readonly) {
				subnode.setAttribute('readonly', 'readonly');
			}
			if (data.value) {
				subnode.value = data.value;
			}
			break;
		default:
			throw new Error('Morebits.quickForm: unknown element type ' + data.type.toString());
	}

	if (!childContainder) {
		childContainder = node;
	}
	if (data.tooltip) {
		Morebits.quickForm.element.generateTooltip(label || node, data);
	}

	if (data.extra) {
		childContainder.extra = data.extra;
	}
	if (data.style) {
		childContainder.setAttribute('style', data.style);
	}
	if (data.className) {
		childContainder.className = childContainder.className ?
			childContainder.className + ' ' + data.className :
			data.className ;
	}
	childContainder.setAttribute('id', data.id || id);

	return [ node, childContainder ];
};

Morebits.quickForm.element.autoNWSW = function() {
	return $(this).offset().top > ($(document).scrollTop() + $(window).height() / 2) ? 'sw' : 'nw';
};

Morebits.quickForm.element.generateTooltip = function QuickFormElementGenerateTooltip(node, data) {
	$('<span/>', {
		'class': 'ui-icon ui-icon-help ui-icon-inline morebits-tooltip'
	}).appendTo(node).tipsy({
		'fallback': data.tooltip,
		'fade': true,
		'gravity': data.type === 'input' || data.type === 'select' ?
			Morebits.quickForm.element.autoNWSW : $.fn.tipsy.autoWE,
		'html': true,
		'delayOut': 250
	});
};

/**
 * Some utility methods for manipulating quickForms after their creation
 * (None of them work for "dyninput" type fields at present)
 *
 * Morebits.quickForm.getElements(form, fieldName)
 *    Returns all form elements with a given field name or ID
 *
 * Morebits.quickForm.getCheckboxOrRadio(elementArray, value)
 *    Searches the array of elements for a checkbox or radio button with a certain |value| attribute
 *
 * Morebits.quickForm.getElementContainer(element)
 *    Returns the <div> containing the form element, or the form element itself
 *    May not work as expected on checkboxes or radios
 *
 * Morebits.quickForm.getElementLabelObject(element)
 *    Gets the HTML element that contains the label of the given form element (mainly for internal use)
 *
 * Morebits.quickForm.getElementLabel(element)
 *    Gets the label text of the element
 *
 * Morebits.quickForm.setElementLabel(element, labelText)
 *    Sets the label of the element to the given text
 *
 * Morebits.quickForm.overrideElementLabel(element, temporaryLabelText)
 *    Stores the element's current label, and temporarily sets the label to the given text
 *
 * Morebits.quickForm.resetElementLabel(element)
 *    Restores the label stored by overrideElementLabel
 *
 * Morebits.quickForm.setElementVisibility(element, visibility)
 *    Shows or hides a form element plus its label and tooltip
 *
 * Morebits.quickForm.setElementTooltipVisibility(element, visibility)
 *    Shows or hides the "question mark" icon next to a form element
 */

Morebits.quickForm.getElements = function QuickFormGetElements(form, fieldName) {
	var $form = $(form);
	var $elements = $form.find('[name="' + fieldName + '"]');
	if ($elements.length > 0) {
		return $elements.toArray();
	}
	$elements = $form.find('#' + fieldName);
	if ($elements.length > 0) {
		return $elements.toArray();
	}
	return null;
};

Morebits.quickForm.getCheckboxOrRadio = function QuickFormGetCheckboxOrRadio(elementArray, value) {
	var found = $.grep(elementArray, function(el) {
		return el.value === value;
	});
	if (found.length > 0) {
		return found[0];
	}
	return null;
};

Morebits.quickForm.getElementContainer = function QuickFormGetElementContainer(element) {
	// for divs, headings and fieldsets, the container is the element itself
	if (element instanceof HTMLFieldSetElement || element instanceof HTMLDivElement ||
			element instanceof HTMLHeadingElement) {
		return element;
	}

	// for others, just return the parent node
	return element.parentNode;
};

Morebits.quickForm.getElementLabelObject = function QuickFormGetElementLabelObject(element) {
	// for buttons, divs and headers, the label is on the element itself
	if (element.type === 'button' || element.type === 'submit' ||
			element instanceof HTMLDivElement || element instanceof HTMLHeadingElement) {
		return element;

	// for fieldsets, the label is the child <legend> element
	} else if (element instanceof HTMLFieldSetElement) {
		return element.getElementsByTagName('legend')[0];

	// for textareas, the label is the sibling <h5> element
	} else if (element instanceof HTMLTextAreaElement) {
		return element.parentNode.getElementsByTagName('h5')[0];

	// for others, the label is the sibling <label> element
	}
	return element.parentNode.getElementsByTagName('label')[0];

};

Morebits.quickForm.getElementLabel = function QuickFormGetElementLabel(element) {
	var labelElement = Morebits.quickForm.getElementLabelObject(element);

	if (!labelElement) {
		return null;
	}
	return labelElement.firstChild.textContent;
};

Morebits.quickForm.setElementLabel = function QuickFormSetElementLabel(element, labelText) {
	var labelElement = Morebits.quickForm.getElementLabelObject(element);

	if (!labelElement) {
		return false;
	}
	labelElement.firstChild.textContent = labelText;
	return true;
};

Morebits.quickForm.overrideElementLabel = function QuickFormOverrideElementLabel(element, temporaryLabelText) {
	if (!element.hasAttribute('data-oldlabel')) {
		element.setAttribute('data-oldlabel', Morebits.quickForm.getElementLabel(element));
	}
	return Morebits.quickForm.setElementLabel(element, temporaryLabelText);
};

Morebits.quickForm.resetElementLabel = function QuickFormResetElementLabel(element) {
	if (element.hasAttribute('data-oldlabel')) {
		return Morebits.quickForm.setElementLabel(element, element.getAttribute('data-oldlabel'));
	}
	return null;
};

Morebits.quickForm.setElementVisibility = function QuickFormSetElementVisibility(element, visibility) {
	$(element).toggle(visibility);
};

Morebits.quickForm.setElementTooltipVisibility = function QuickFormSetElementTooltipVisibility(element, visibility) {
	$(Morebits.quickForm.getElementContainer(element)).find('.morebits-tooltip').toggle(visibility);
};



/**
 * **************** HTMLFormElement ****************
 *
 * getChecked:
 *   XXX Doesn't seem to work reliably across all browsers at the moment. -- see getChecked2 in twinkleunlink.js, which is better
 *
 *   Returns an array containing the values of elements with the given name, that has it's
 *   checked property set to true. (i.e. a checkbox or a radiobutton is checked), or select options
 *   that have selected set to true. (don't try to mix selects with radio/checkboxes, please)
 *   Type is optional and can specify if either radio or checkbox (for the event
 *   that both checkboxes and radiobuttons have the same name.
 */

HTMLFormElement.prototype.getChecked = function(name, type) {
	var elements = this.elements[name];
	if (!elements) {
		// if the element doesn't exists, return null.
		return null;
	}
	var return_array = [];
	var i;
	if (elements instanceof HTMLSelectElement) {
		var options = elements.options;
		for (i = 0; i < options.length; ++i) {
			if (options[i].selected) {
				if (options[i].values) {
					return_array.push(options[i].values);
				} else {
					return_array.push(options[i].value);
				}

			}
		}
	} else if (elements instanceof HTMLInputElement) {
		if (type && elements.type !== type) {
			return [];
		} else if (elements.checked) {
			return [ elements.value ];
		}
	} else {
		for (i = 0; i < elements.length; ++i) {
			if (elements[i].checked) {
				if (type && elements[i].type !== type) {
					continue;
				}
				if (elements[i].values) {
					return_array.push(elements[i].values);
				} else {
					return_array.push(elements[i].value);
				}
			}
		}
	}
	return return_array;
};



/**
 * **************** RegExp ****************
 *
 * RegExp.escape: Will escape a string to be used in a RegExp
 */

RegExp.escape = function(text, space_fix) {
	text = mw.RegExp.escape(text);

	// Special MediaWiki escape - underscore/space are often equivalent
	if (space_fix) {
		text = text.replace(/ |_/g, '[_ ]');
	}

	return text;
};



/**
 * **************** Morebits.bytes ****************
 * Utility object for formatting byte values
 */

Morebits.bytes = function(value) {
	if (typeof value === 'string') {
		var res = /(\d+) ?(\w?)(i?)B?/.exec(value);
		var number = res[1];
		var mag = res[2];
		var si = res[3];

		if (!number) {
			this.number = 0;
			return;
		}

		if (!si) {
			this.value = number * Math.pow(10, Morebits.bytes.magnitudes[mag] * 3);
		} else {
			this.value = number * Math.pow(2, Morebits.bytes.magnitudes[mag] * 10);
		}
	} else {
		this.value = value;
	}
};

Morebits.bytes.magnitudes = {
	'': 0,
	'K': 1,
	'M': 2,
	'G': 3,
	'T': 4,
	'P': 5,
	'E': 6,
	'Z': 7,
	'Y': 8
};

Morebits.bytes.rmagnitudes = {
	0: '',
	1: 'K',
	2: 'M',
	3: 'G',
	4: 'T',
	5: 'P',
	6: 'E',
	7: 'Z',
	8: 'Y'
};

Morebits.bytes.prototype.valueOf = function() {
	return this.value;
};

Morebits.bytes.prototype.toString = function(magnitude) {
	var tmp = this.value;
	if (magnitude) {
		var si = /i/.test(magnitude);
		var mag = magnitude.replace(/.*?(\w)i?B?.*/g, '$1');
		if (si) {
			tmp /= Math.pow(2, Morebits.bytes.magnitudes[mag] * 10);
		} else {
			tmp /= Math.pow(10, Morebits.bytes.magnitudes[mag] * 3);
		}
		if (parseInt(tmp, 10) !== tmp) {
			tmp = Number(tmp).toPrecision(4);
		}
		return tmp + ' ' + mag + (si ? 'i' : '') + 'B';
	}
	// si per default
	var current = 0;
	while (tmp >= 1024) {
		tmp /= 1024;
		++current;
	}
	tmp = this.value / Math.pow(2, current * 10);
	if (parseInt(tmp, 10) !== tmp) {
		tmp = Number(tmp).toPrecision(4);
	}
	return tmp + ' ' + Morebits.bytes.rmagnitudes[current] + (current > 0 ? 'iB' : 'B');

};



/**
 * **************** String; Morebits.string ****************
 */

if (!String.prototype.trimLeft) {
	String.prototype.trimLeft = function stringPrototypeLtrim() {
		return this.replace(/^[\s]+/g, '');
	};
}

if (!String.prototype.trimRight) {
	String.prototype.trimRight = function stringPrototypeRtrim() {
		return this.replace(/[\s]+$/g, '');
	};
}

if (!String.prototype.trim) {
	String.prototype.trim = function stringPrototypeTrim() {
		return this.trimRight().trimLeft();
	};
}

Morebits.string = {
	// Helper functions to change case of a string
	toUpperCaseFirstChar: function(str) {
		str = str.toString();
		return str.substr(0, 1).toUpperCase() + str.substr(1);
	},
	toLowerCaseFirstChar: function(str) {
		str = str.toString();
		return str.substr(0, 1).toLowerCase() + str.substr(1);
	},
	splitWeightedByKeys: function(str, start, end, skip) {
		if (start.length !== end.length) {
			throw new Error('起始和结束标记必须等长');
		}
		var level = 0;
		var initial = null;
		var result = [];
		if (!$.isArray(skip)) {
			if (skip === undefined) {
				skip = [];
			} else if (typeof skip === 'string') {
				skip = [ skip ];
			} else {
				throw new Error('不适用的跳过参数');
			}
		}
		for (var i = 0; i < str.length; ++i) {
			for (var j = 0; j < skip.length; ++j) {
				if (str.substr(i, skip[j].length) === skip[j]) {
					i += skip[j].length - 1;
					continue;
				}
			}
			if (str.substr(i, start.length) === start) {
				if (initial === null) {
					initial = i;
				}
				++level;
				i += start.length - 1;
			} else if (str.substr(i, end.length) === end) {
				--level;
				i += end.length - 1;
			}
			if (!level && initial !== null) {
				result.push(str.substring(initial, i + 1));
				initial = null;
			}
		}

		return result;
	},
	// for deletion/other templates taking a freeform "reason" from a textarea (e.g. PROD, XFD, RPP)
	formatReasonText: function(str) {
		var result = str.toString().trimRight();
		var unbinder = new Morebits.unbinder(result);
		unbinder.unbind('<no' + 'wiki>', '</no' + 'wiki>');
		unbinder.content = unbinder.content.replace(/\|/g, '{{subst:!}}');
		return unbinder.rebind();
	},
	// a replacement for String.prototype.replace() when the second parameter (the
	// replacement string) is arbitrary, such as a username or freeform user input,
	// and may contain dollar signs
	safeReplace: function morebitsStringSafeReplace(string, pattern, replacement) {
		return string.replace(pattern, replacement.replace(/\$/g, '$$$$'));
	}
};



/**
 * **************** Morebits.array ****************
 *
 * uniq(arr): returns a copy of the array with duplicates removed
 *
 * dups(arr): returns a copy of the array with the first instance of each value
 *            removed; subsequent instances of those values (duplicates) remain
 *
 * chunk(arr, size): breaks up |arr| into smaller arrays of length |size|, and
 *                   returns an array of these "chunked" arrays
 */

Morebits.array = {
	uniq: function(arr) {
		if (!$.isArray(arr)) {
			throw 'A non-array object passed to Morebits.array.uniq';
		}
		var result = [];
		for (var i = 0; i < arr.length; ++i) {
			var current = arr[i];
			if (result.indexOf(current) === -1) {
				result.push(current);
			}
		}
		return result;
	},
	dups: function(arr) {
		if (!$.isArray(arr)) {
			throw 'A non-array object passed to Morebits.array.dups';
		}
		var uniques = [];
		var result = [];
		for (var i = 0; i < arr.length; ++i) {
			var current = arr[i];
			if (uniques.indexOf(current) === -1) {
				uniques.push(current);
			} else {
				result.push(current);
			}
		}
		return result;
	},
	chunk: function(arr, size) {
		if (!$.isArray(arr)) {
			throw 'A non-array object passed to Morebits.array.chunk';
		}
		if (typeof size !== 'number' || size <= 0) { // pretty impossible to do anything :)
			return [ arr ]; // we return an array consisting of this array.
		}
		var result = [];
		var current;
		for (var i = 0; i < arr.length; ++i) {
			if (i % size === 0) { // when 'i' is 0, this is always true, so we start by creating one.
				current = [];
				result.push(current);
			}
			current.push(arr[i]);
		}
		return result;
	}
};



/**
 * **************** Morebits.pageNameNorm ****************
 * Stores a normalized version of the wgPageName variable (underscores converted to spaces).
 * For queen/king/whatever and country!
 */
Morebits.pageNameNorm = mw.config.get('wgPageName').replace(/_/g, ' ');



/**
 * **************** Morebits.unbinder ****************
 * Used by Morebits.wikitext.page.commentOutImage
 */

Morebits.unbinder = function Unbinder(string) {
	if (typeof string !== 'string') {
		throw new Error('不是字符串');
	}
	this.content = string;
	this.counter = 0;
	this.history = {};
	this.prefix = '%UNIQ::' + Math.random() + '::';
	this.postfix = '::UNIQ%';
};

Morebits.unbinder.prototype = {
	unbind: function UnbinderUnbind(prefix, postfix) {
		var re = new RegExp(prefix + '(.*?)' + postfix, 'g');
		this.content = this.content.replace(re, Morebits.unbinder.getCallback(this));
	},
	rebind: function UnbinderRebind() {
		var content = this.content;
		content.self = this;
		for (var current in this.history) {
			if (this.history.hasOwnProperty(current)) {
				content = content.replace(current, this.history[current]);
			}
		}
		return content;
	},
	prefix: null, // %UNIQ::0.5955981644938324::
	postfix: null, // ::UNIQ%
	content: null, // string
	counter: null, // 0++
	history: null // {}
};

Morebits.unbinder.getCallback = function UnbinderGetCallback(self) {
	return function UnbinderCallback(match) {
		var current = self.prefix + self.counter + self.postfix;
		self.history[current] = match;
		++self.counter;
		return current;
	};
};



/**
 * **************** Date ****************
 * Helper functions to get the month as a string instead of a number
 *
 * Normally it is poor form to play with prototypes of primitive types, but it
 * is fairly unlikely that anyone will iterate over a Date object.
 */

Date.monthNames = [
	'January',
	'February',
	'March',
	'April',
	'May',
	'June',
	'July',
	'August',
	'September',
	'October',
	'November',
	'December'
];

Date.monthNamesAbbrev = [
	'Jan',
	'Feb',
	'Mar',
	'Apr',
	'May',
	'Jun',
	'Jul',
	'Aug',
	'Sep',
	'Oct',
	'Nov',
	'Dec'
];

Date.prototype.getMonthName = function() {
	return Date.monthNames[this.getMonth()];
};

Date.prototype.getMonthNameAbbrev = function() {
	return Date.monthNamesAbbrev[this.getMonth()];
};

Date.prototype.getUTCMonthName = function() {
	return Date.monthNames[this.getUTCMonth()];
};

Date.prototype.getUTCMonthNameAbbrev = function() {
	return Date.monthNamesAbbrev[this.getUTCMonth()];
};



/**
 * **************** Morebits.wikipedia ****************
 * English Wikipedia-specific objects
 */

Morebits.wikipedia = {};

Morebits.wikipedia.namespaces = {
	'-2': 'Media',
	'-1': 'Special',
	'0': '',
	'1': 'Talk',
	'2': 'User',
	'3': 'User talk',
	'4': 'Project',
	'5': 'Project talk',
	'6': 'File',
	'7': 'File talk',
	'8': 'MediaWiki',
	'9': 'MediaWiki talk',
	'10': 'Template',
	'11': 'Template talk',
	'12': 'Help',
	'13': 'Help talk',
	'14': 'Category',
	'15': 'Category talk',
	'100': 'Portal',
	'101': 'Portal talk',
	'108': 'Book',
	'109': 'Book talk',
	'118': 'Draft',
	'119': 'Draft talk',
	'446': 'Education Program',
	'447': 'Education Program talk',
	'710': 'TimedText',
	'711': 'TimedText talk',
	'828': 'Module',
	'829': 'Module talk'
};

Morebits.wikipedia.namespacesFriendly = {
	'0': wgULS('（条目）', '（條目）'),
	'1': 'Talk',
	'2': 'User',
	'3': 'User talk',
	'4': 'Wikipedia',
	'5': 'Wikipedia talk',
	'6': 'File',
	'7': 'File talk',
	'8': 'MediaWiki',
	'9': 'MediaWiki talk',
	'10': 'Template',
	'11': 'Template talk',
	'12': 'Help',
	'13': 'Help talk',
	'14': 'Category',
	'15': 'Category talk',
	'100': 'Portal',
	'101': 'Portal talk',
	'108': 'Book',
	'109': 'Book talk',
	'118': 'Draft',
	'119': 'Draft talk',
	'446': 'Education Program',
	'447': 'Education Program talk',
	'710': 'TimedText',
	'711': 'TimedText talk',
	'828': 'Module',
	'829': 'Module talk'
};



/**
 * **************** Morebits.wiki ****************
 * Various objects for wiki editing and API access
 */

Morebits.wiki = {};

// Determines whether the current page is a redirect or soft redirect
// (fails to detect soft redirects on edit, history, etc. pages)
Morebits.wiki.isPageRedirect = function wikipediaIsPageRedirect() {
	return !!(mw.config.get('wgIsRedirect') || document.getElementById('softredirect'));
};



/**
 * **************** Morebits.wiki.actionCompleted ****************
 *
 * Use of Morebits.wiki.actionCompleted():
 *    Every call to Morebits.wiki.api.post() results in the dispatch of
 *    an asynchronous callback. Each callback can in turn
 *    make an additional call to Morebits.wiki.api.post() to continue a
 *    processing sequence. At the conclusion of the final callback
 *    of a processing sequence, it is not possible to simply return to the
 *    original caller because there is no call stack leading back to
 *    the original context. Instead, Morebits.wiki.actionCompleted.event() is
 *    called to display the result to the user and to perform an optional
 *    page redirect.
 *
 *    The determination of when to call Morebits.wiki.actionCompleted.event()
 *    is managed through the globals Morebits.wiki.numberOfActionsLeft and
 *    Morebits.wiki.nbrOfCheckpointsLeft. Morebits.wiki.numberOfActionsLeft is
 *    incremented at the start of every Morebits.wiki.api call and decremented
 *    after the completion of a callback function. If a callback function
 *    does not create a new Morebits.wiki.api object before exiting, it is the
 *    final step in the processing chain and Morebits.wiki.actionCompleted.event()
 *    will then be called.
 *
 *    Optionally, callers may use Morebits.wiki.addCheckpoint() to indicate that
 *    processing is not complete upon the conclusion of the final callback function.
 *    This is used for batch operations. The end of a batch is signaled by calling
 *    Morebits.wiki.removeCheckpoint().
 */

Morebits.wiki.numberOfActionsLeft = 0;
Morebits.wiki.nbrOfCheckpointsLeft = 0;

Morebits.wiki.actionCompleted = function(self) {
	if (--Morebits.wiki.numberOfActionsLeft <= 0 && Morebits.wiki.nbrOfCheckpointsLeft <= 0) {
		Morebits.wiki.actionCompleted.event(self);
	}
};

// Change per action wanted
Morebits.wiki.actionCompleted.event = function() {
	new Morebits.status(Morebits.wiki.actionCompleted.notice, Morebits.wiki.actionCompleted.postfix, 'info');
	if (Morebits.wiki.actionCompleted.redirect) {
		// if it isn't a URL, make it one. TODO: This breaks on the articles 'http://', 'ftp://', and similar ones.
		if (!(/^\w+:\/\//).test(Morebits.wiki.actionCompleted.redirect)) {
			Morebits.wiki.actionCompleted.redirect = mw.util.getUrl(Morebits.wiki.actionCompleted.redirect);
			if (Morebits.wiki.actionCompleted.followRedirect === false) {
				Morebits.wiki.actionCompleted.redirect += '?redirect=no';
			}
		}
		window.setTimeout(function() {
			window.location = Morebits.wiki.actionCompleted.redirect;
		}, Morebits.wiki.actionCompleted.timeOut);
	}
};

Morebits.wiki.actionCompleted.timeOut = typeof window.wpActionCompletedTimeOut === 'undefined' ? 5000 : window.wpActionCompletedTimeOut ;
Morebits.wiki.actionCompleted.redirect = null;
Morebits.wiki.actionCompleted.notice = wgULS('动作', '動作');
Morebits.wiki.actionCompleted.postfix = '已完成';

Morebits.wiki.addCheckpoint = function() {
	++Morebits.wiki.nbrOfCheckpointsLeft;
};

Morebits.wiki.removeCheckpoint = function() {
	if (--Morebits.wiki.nbrOfCheckpointsLeft <= 0 && Morebits.wiki.numberOfActionsLeft <= 0) {
		Morebits.wiki.actionCompleted.event();
	}
};

/**
 * **************** Morebits.wiki.api ****************
 * An easy way to talk to the MediaWiki API.
 *
 * Constructor parameters:
 *    currentAction: the current action (required)
 *    query: the query (required)
 *    onSuccess: the function to call when request gotten
 *    statusElement: a Morebits.status object to use for status messages (optional)
 *    onError: the function to call if an error occurs (optional)
 */
Morebits.wiki.api = function(currentAction, query, onSuccess, statusElement, onError) {
	this.currentAction = currentAction;
	this.query = query;
	this.query.format = 'xml';
	this.query.assert = 'user';
	this.onSuccess = onSuccess;
	this.onError = onError;
	if (statusElement) {
		this.statelem = statusElement;
		this.statelem.status(currentAction);
	} else {
		this.statelem = new Morebits.status(currentAction);
	}
};

Morebits.wiki.api.prototype = {
	currentAction: '',
	onSuccess: null,
	onError: null,
	parent: window,  // use global context if there is no parent object
	query: null,
	responseXML: null,
	setParent: function(parent) {
		this.parent = parent;
	},  // keep track of parent object for callbacks
	statelem: null,  // this non-standard name kept for backwards compatibility
	statusText: null, // result received from the API, normally "success" or "error"
	errorCode: null, // short text error code, if any, as documented in the MediaWiki API
	errorText: null, // full error description, if any

	// post(): carries out the request
	// do not specify a parameter unless you really really want to give jQuery some extra parameters
	post: function(callerAjaxParameters) {

		++Morebits.wiki.numberOfActionsLeft;

		var ajaxparams = $.extend({}, {
			context: this,
			type: 'POST',
			url: mw.util.wikiScript('api'),
			data: Morebits.queryString.create(this.query),
			dataType: 'xml',
			headers: {
				'Api-User-Agent': morebitsWikiApiUserAgent
			}
		}, callerAjaxParameters);

		return $.ajax(ajaxparams).done(
			function(xml, statusText) {
				this.statusText = statusText;
				this.responseXML = xml;
				this.errorCode = $(xml).find('error').attr('code');
				this.errorText = $(xml).find('error').attr('info');

				if (typeof this.errorCode === 'string') {

					// the API didn't like what we told it, e.g., bad edit token or an error creating a page
					this.returnError();
					return;
				}

				// invoke success callback if one was supplied
				if (this.onSuccess) {

					// set the callback context to this.parent for new code and supply the API object
					// as the first argument to the callback (for legacy code)
					this.onSuccess.call(this.parent, this);
				} else {
					this.statelem.info('完成');
				}

				Morebits.wiki.actionCompleted();
			}
		).fail(
			// only network and server errors reach here – complaints from the API itself are caught in success()
			function(jqXHR, statusText, errorThrown) {
				this.statusText = statusText;
				this.errorThrown = errorThrown; // frequently undefined
				this.errorText = statusText + wgULS('在调用API时发生了错误“', '在存取API時發生了錯誤「') + jqXHR.statusText + wgULS('”。', '」。');
				this.returnError();
			}
		);  // the return value should be ignored, unless using callerAjaxParameters with |async: false|
	},

	returnError: function() {
		if (this.errorCode === 'badtoken') {
			this.statelem.error(wgULS('无效令牌，请刷新页面并重试', '無效權杖，請重新整理頁面並重試'));
		} else {
			this.statelem.error(this.errorText);
		}

		// invoke failure callback if one was supplied
		if (this.onError) {

			// set the callback context to this.parent for new code and supply the API object
			// as the first argument to the callback for legacy code
			this.onError.call(this.parent, this);
		}
		// don't complete the action so that the error remains displayed
	},

	getStatusElement: function() {
		return this.statelem;
	},

	getErrorCode: function() {
		return this.errorCode;
	},

	getErrorText: function() {
		return this.errorText;
	},

	getXML: function() {
		return this.responseXML;
	}
};

// Custom user agent header, used by WMF for server-side logging
// See https://lists.wikimedia.org/pipermail/mediawiki-api-announce/2014-November/000075.html
var morebitsWikiApiUserAgent = 'morebits.js~zh/2.0 ([[w:zh:WT:TW]])';

// Sets the custom user agent header
Morebits.wiki.api.setApiUserAgent = function(ua) {
	morebitsWikiApiUserAgent = (ua ? ua + ' ' : '') + 'morebits.js~zh/2.0 ([[w:zh:WT:TW]])';
};



/**
 * **************** Morebits.wiki.page ****************
 * Uses the MediaWiki API to load a page and optionally edit it, move it, etc.
 *
 * Callers are not permitted to directly access the properties of this class!
 * All property access is through the appropriate get___() or set___() method.
 *
 * Callers should set Morebits.wiki.actionCompleted.notice and Morebits.wiki.actionCompleted.redirect
 * before the first call to Morebits.wiki.page.load().
 *
 * Each of the callback functions takes one parameter, which is a
 * reference to the Morebits.wiki.page object that registered the callback.
 * Callback functions may invoke any Morebits.wiki.page prototype method using this reference.
 *
 *
 * NOTE: This list of member functions is incomplete.
 *
 * Constructor: Morebits.wiki.page(pageName, currentAction)
 *    pageName - the name of the page, prefixed by the namespace (if any)
 *               (for the current page, use mw.config.get('wgPageName'))
 *    currentAction - a string describing the action about to be undertaken (optional)
 *
 * load(onSuccess, onFailure): Loads the text for the page
 *    onSuccess - callback function which is called when the load has succeeded
 *    onFailure - callback function which is called when the load fails (optional)
 *
 * save(onSuccess, onFailure): Saves the text for the page. Must be preceded by calling load().
 *    onSuccess - callback function which is called when the save has succeeded (optional)
 *    onFailure - callback function which is called when the save fails (optional)
 *    Warning: Calling save() can result in additional calls to the previous load() callbacks to
 *             recover from edit conflicts!
 *             In this case, callers must make the same edit to the new pageText and reinvoke save().
 *             This behavior can be disabled with setMaxConflictRetries(0).
 *
 * append(onSuccess, onFailure): Adds the text provided via setAppendText() to the end of the page.
 *                               Does not require calling load() first.
 *    onSuccess - callback function which is called when the method has succeeded (optional)
 *    onFailure - callback function which is called when the method fails (optional)
 *
 * prepend(onSuccess, onFailure): Adds the text provided via setPrependText() to the start of the page.
 *                                Does not require calling load() first.
 *    onSuccess - callback function which is called when the method has succeeded (optional)
 *    onFailure - callback function which is called when the method fails (optional)
 *
 * getPageName(): returns a string containing the name of the loaded page, including the namespace
 *
 * getPageText(): returns a string containing the text of the page after a successful load()
 *
 * setPageText(pageText)
 *    pageText - string containing the updated page text that will be saved when save() is called
 *
 * setAppendText(appendText)
 *    appendText - string containing the text that will be appended to the page when append() is called
 *
 * setPrependText(prependText)
 *    prependText - string containing the text that will be prepended to the page when prepend() is called
 *
 * setEditSummary(summary)
 *    summary - string containing the text of the edit summary that will be used when save() is called
 *
 * setTags(tags)
 *    tags - string containing the text of the tags that will be applied when save() is called
 *
 * setMinorEdit(minorEdit)
 *    minorEdit is a boolean value:
 *       true  - When save is called, the resulting edit will be marked as "minor".
 *       false - When save is called, the resulting edit will not be marked as "minor". (default)
 *
 * setBotEdit(botEdit)
 *    botEdit is a boolean value:
 *       true  - When save is called, the resulting edit will be marked as "bot".
 *       false - When save is called, the resulting edit will not be marked as "bot". (default)
 *
 * setPageSection(pageSection)
 *    pageSection - integer specifying the section number to load or save. The default is |null|, which means
 *                  that the entire page will be retrieved.
 *
 * setMaxConflictRetries(maxRetries)
 *    maxRetries - number of retries for save errors involving an edit conflict or loss of edit token
 *    default: 2
 *
 * setMaxRetries(maxRetries)
 *    maxRetries - number of retries for save errors not involving an edit conflict or loss of edit token
 *    default: 2
 *
 * setCallbackParameters(callbackParameters)
 *    callbackParameters - an object for use in a callback function
 *
 * getCallbackParameters(): returns the object previous set by setCallbackParameters()
 *
 *    Callback notes: callbackParameters is for use by the caller only. The parameters
 *                    allow a caller to pass the proper context into its callback function.
 *                    Callers must ensure that any changes to the callbackParameters object
 *                    within a load() callback still permit a proper re-entry into the
 *                    load() callback if an edit conflict is detected upon calling save().
 *
 * getStatusElement(): returns the Status element created by the constructor
 *
 * setFollowRedirect(followRedirect)
 *    followRedirect is a boolean value:
 *       true  - a maximum of one redirect will be followed.
 *               In the event of a redirect, a message is displayed to the user and
 *               the redirect target can be retrieved with getPageName().
 *       false - the requested pageName will be used without regard to any redirect. (default)
 *
 * setWatchlist(watchlistOption)
 *    watchlistOption is a boolean value:
 *       true  - page will be added to the user's watchlist when save() is called
 *       false - watchlist status of the page will not be changed (default)
 *
 * setWatchlistFromPreferences(watchlistOption)
 *    watchlistOption is a boolean value:
 *       true  - page watchlist status will be set based on the user's
 *               preference settings when save() is called
 *       false - watchlist status of the page will not be changed (default)
 *
 *    Watchlist notes:
 *       1. The MediaWiki API value of 'unwatch', which explicitly removes the page from the
 *          user's watchlist, is not used.
 *       2. If both setWatchlist() and setWatchlistFromPreferences() are called,
 *          the last call takes priority.
 *       3. Twinkle modules should use the appropriate preference to set the watchlist options.
 *       4. Most Twinkle modules use setWatchlist().
 *          setWatchlistFromPreferences() is only needed for the few Twinkle watchlist preferences
 *          that accept a string value of 'default'.
 *
 * setCreateOption(createOption)
 *    createOption is a string value:
 *       'recreate'   - create the page if it does not exist, or edit it if it exists
 *       'createonly' - create the page if it does not exist, but return an error if it
 *                      already exists
 *       'nocreate'   - don't create the page, only edit it if it already exists
 *       null         - create the page if it does not exist, unless it was deleted in the moment
 *                      between retrieve the edit token and saving the edit (default)
 *
 * exists(): returns true if the page existed on the wiki when it was last loaded
 *
 * lookupCreator(onSuccess): Retrieves the username of the user who created the page
 *    onSuccess - callback function which is called when the username is found
 *                within the callback, the username can be retrieved using the getCreator() function
 *
 * getCreator(): returns the user who created the page following lookupCreator()
 *
 * getCurrentID(): returns a string containing the current revision ID of the page
 *
 * patrol(): marks the page as patrolled, if possible
 *
 * move(onSuccess, onFailure): Moves a page to another title
 *
 * deletePage(onSuccess, onFailure): Deletes a page (for admins only)
 *
 */

/**
 * Call sequence for common operations (optional final user callbacks not shown):
 *
 *    Edit current contents of a page (no edit conflict):
 *       .load(userTextEditCallback) -> ctx.loadApi.post() -> ctx.loadApi.post.success() ->
 *             ctx.fnLoadSuccess() -> userTextEditCallback() -> .save() ->
 *             ctx.saveApi.post() -> ctx.loadApi.post.success() -> ctx.fnSaveSuccess()
 *
 *    Edit current contents of a page (with edit conflict):
 *       .load(userTextEditCallback) -> ctx.loadApi.post() -> ctx.loadApi.post.success() ->
 *             ctx.fnLoadSuccess() -> userTextEditCallback() -> .save() ->
 *             ctx.saveApi.post() -> ctx.loadApi.post.success() -> ctx.fnSaveError() ->
 *             ctx.loadApi.post() -> ctx.loadApi.post.success() ->
 *             ctx.fnLoadSuccess() -> userTextEditCallback() -> .save() ->
 *             ctx.saveApi.post() -> ctx.loadApi.post.success() -> ctx.fnSaveSuccess()
 *
 *    Append to a page (similar for prepend):
 *       .append() -> ctx.loadApi.post() -> ctx.loadApi.post.success() ->
 *             ctx.fnLoadSuccess() -> ctx.fnAutoSave() -> .save() ->
 *             ctx.saveApi.post() -> ctx.loadApi.post.success() -> ctx.fnSaveSuccess()
 *
 *    Notes:
 *       1. All functions following Morebits.wiki.api.post() are invoked asynchronously
 *          from the jQuery AJAX library.
 *       2. The sequence for append/prepend could be slightly shortened, but it would require
 *          significant duplication of code for little benefit.
 */

Morebits.wiki.page = function(pageName, currentAction) {

	if (!currentAction) {
		currentAction = wgULS('打开页面“', '開啟頁面「') + pageName + wgULS('”', '」');
	}

	/**
	 * Private context variables
	 *
	 * This context is not visible to the outside, thus all the data here
	 * must be accessed via getter and setter functions.
	 */
	var ctx = {
		// backing fields for public properties
		pageName: pageName,
		pageExists: false,
		editSummary: null,
		tags: '',
		callbackParameters: null,
		statusElement: new Morebits.status(currentAction),

		// - edit
		pageText: null,
		editMode: 'all',  // save() replaces entire contents of the page by default
		appendText: null,   // can't reuse pageText for this because pageText is needed to follow a redirect
		prependText: null,  // can't reuse pageText for this because pageText is needed to follow a redirect
		createOption: null,
		minorEdit: false,
		botEdit: false,
		pageSection: null,
		maxConflictRetries: 2,
		maxRetries: 2,
		followRedirect: false,
		watchlistOption: 'nochange',
		creator: null,

		// - revert
		revertOldID: null,

		// - move
		moveDestination: null,
		moveTalkPage: false,
		moveSubpages: false,
		moveSuppressRedirect: false,

		// - protect
		protectEdit: null,
		protectMove: null,
		protectCreate: null,
		protectCascade: false,

		// - stabilize (FlaggedRevs)
		flaggedRevs: null,

		// internal status
		pageLoaded: false,
		csrfToken: null,
		loadTime: null,
		lastEditTime: null,
		revertCurID: null,
		revertUser: null,
		fullyProtected: false,
		suppressProtectWarning: false,
		conflictRetries: 0,
		retries: 0,

		// callbacks
		onLoadSuccess: null,
		onLoadFailure: null,
		onSaveSuccess: null,
		onSaveFailure: null,
		onLookupCreatorSuccess: null,
		onMoveSuccess: null,
		onMoveFailure: null,
		onDeleteSuccess: null,
		onDeleteFailure: null,
		onProtectSuccess: null,
		onProtectFailure: null,
		onStabilizeSuccess: null,
		onStabilizeFailure: null,

		// internal objects
		loadQuery: null,
		loadApi: null,
		saveApi: null,
		lookupCreatorApi: null,
		moveApi: null,
		moveProcessApi: null,
		deleteApi: null,
		deleteProcessApi: null,
		protectApi: null,
		protectProcessApi: null,
		stabilizeApi: null,
		stabilizeProcessApi: null
	};

	var emptyFunction = function() { };

	/**
	 * Public interface accessors
	 */
	this.getPageName = function() {
		return ctx.pageName;
	};

	this.getPageText = function() {
		return ctx.pageText;
	};

	this.setPageText = function(pageText) {
		ctx.editMode = 'all';
		ctx.pageText = pageText;
	};

	this.setAppendText = function(appendText) {
		ctx.editMode = 'append';
		ctx.appendText = appendText;
	};

	this.setPrependText = function(prependText) {
		ctx.editMode = 'prepend';
		ctx.prependText = prependText;
	};

	this.setEditSummary = function(summary) {
		ctx.editSummary = summary;
	};

	this.setTags = function(tags) {
		ctx.tags = tags;
	};

	this.setCreateOption = function(createOption) {
		ctx.createOption = createOption;
	};

	this.setMinorEdit = function(minorEdit) {
		ctx.minorEdit = minorEdit;
	};

	this.setBotEdit = function(botEdit) {
		ctx.botEdit = botEdit;
	};

	this.setPageSection = function(pageSection) {
		ctx.pageSection = pageSection;
	};

	this.setMaxConflictRetries = function(maxRetries) {
		ctx.maxConflictRetries = maxRetries;
	};

	this.setMaxRetries = function(maxRetries) {
		ctx.maxRetries = maxRetries;
	};

	this.setCallbackParameters = function(callbackParameters) {
		ctx.callbackParameters = callbackParameters;
	};

	this.getCallbackParameters = function() {
		return ctx.callbackParameters;
	};

	this.getCreator = function() {
		return ctx.creator;
	};

	this.setOldID = function(oldID) {
		ctx.revertOldID = oldID;
	};

	this.getCurrentID = function() {
		return ctx.revertCurID;
	};

	this.getRevisionUser = function() {
		return ctx.revertUser;
	};

	this.setMoveDestination = function(destination) {
		ctx.moveDestination = destination;
	};

	this.setMoveTalkPage = function(flag) {
		ctx.moveTalkPage = !!flag;
	};

	this.setMoveSubpages = function(flag) {
		ctx.moveSubpages = !!flag;
	};

	this.setMoveSuppressRedirect = function(flag) {
		ctx.moveSuppressRedirect = !!flag;
	};

	this.setEditProtection = function(level, expiry) {
		ctx.protectEdit = { level: level, expiry: expiry };
	};

	this.setMoveProtection = function(level, expiry) {
		ctx.protectMove = { level: level, expiry: expiry };
	};

	this.setCreateProtection = function(level, expiry) {
		ctx.protectCreate = { level: level, expiry: expiry };
	};

	this.setCascadingProtection = function(flag) {
		ctx.protectCascade = !!flag;
	};

	this.setFlaggedRevs = function(level, expiry) {
		ctx.flaggedRevs = { level: level, expiry: expiry };
	};

	this.getStatusElement = function() {
		return ctx.statusElement;
	};

	this.setFollowRedirect = function(followRedirect) {
		if (ctx.pageLoaded) {
			ctx.statusElement.error('内部错误：不能在页面加载后修改重定向设置！');
			return;
		}
		ctx.followRedirect = followRedirect;
	};

	this.setWatchlist = function(flag) {
		if (flag) {
			ctx.watchlistOption = 'watch';
		} else {
			ctx.watchlistOption = 'nochange';
		}
	};

	this.setWatchlistFromPreferences = function(flag) {
		if (flag) {
			ctx.watchlistOption = 'preferences';
		} else {
			ctx.watchlistOption = 'nochange';
		}
	};

	this.suppressProtectWarning = function() {
		ctx.suppressProtectWarning = true;
	};

	this.exists = function() {
		return ctx.pageExists;
	};

	this.load = function(onSuccess, onFailure) {
		ctx.onLoadSuccess = onSuccess;
		ctx.onLoadFailure = onFailure || emptyFunction;

		// Need to be able to do something after the page loads
		if (!onSuccess) {
			ctx.statusElement.error('内部错误：未给load()提供onSuccess回调函数！');
			ctx.onLoadFailure(this);
			return;
		}

		ctx.loadQuery = {
			action: 'query',
			prop: 'info|revisions',
			intoken: 'edit',  // fetch an edit token
			titles: ctx.pageName
			// don't need rvlimit=1 because we don't need rvstartid here and only one actual rev is returned by default
		};

		if (ctx.editMode === 'all') {
			ctx.loadQuery.rvprop = 'content|timestamp';  // get the page content at the same time, if needed
		} else if (ctx.editMode === 'revert') {
			ctx.loadQuery.rvprop = 'timestamp';
			ctx.loadQuery.rvlimit = 1;
			ctx.loadQuery.rvstartid = ctx.revertOldID;
		}

		if (ctx.followRedirect) {
			ctx.loadQuery.redirects = '';  // follow all redirects
		}
		if (typeof ctx.pageSection === 'number') {
			ctx.loadQuery.rvsection = ctx.pageSection;
		}
		if (Morebits.userIsInGroup('sysop')) {
			ctx.loadQuery.inprop = 'protection';
		}

		ctx.loadApi = new Morebits.wiki.api(wgULS('抓取页面…', '擷取頁面…'), ctx.loadQuery, fnLoadSuccess, ctx.statusElement, ctx.onLoadFailure);
		ctx.loadApi.setParent(this);
		ctx.loadApi.post();
	};

	// Save updated .pageText to Wikipedia
	// Only valid after successful .load()
	this.save = function(onSuccess, onFailure) {
		ctx.onSaveSuccess = onSuccess;
		ctx.onSaveFailure = onFailure || emptyFunction;

		// are we getting our edit token from mw.user.tokens?
		var canUseMwUserToken = fnCanUseMwUserToken('edit');

		if (!ctx.pageLoaded && !canUseMwUserToken) {
			ctx.statusElement.error('内部错误：试图保存未被加载的页面！');
			ctx.onSaveFailure(this);
			return;
		}
		if (!ctx.editSummary) {
			ctx.statusElement.error('内部错误：保存前未设置编辑摘要！');
			ctx.onSaveFailure(this);
			return;
		}

		// shouldn't happen if canUseMwUserToken === true
		if (ctx.fullyProtected && !ctx.suppressProtectWarning &&
			!confirm(wgULS('您即将编辑全保护页面 "', '您即將編輯全保護頁面 "') + ctx.pageName +
			(ctx.fullyProtected === 'infinity' ? '（永久）' : '（到期：' + ctx.fullyProtected + ')') +
			wgULS('。\n\n点击确定以确定，或点击取消以取消。', '。\n\n點選確定以繼續，或點選取消以取消。'))) {
			ctx.statusElement.error(wgULS('已取消对全保护页面的编辑。', '已取消對全保護頁面的編輯。'));
			ctx.onSaveFailure(this);
			return;
		}

		ctx.retries = 0;

		var query = {
			action: 'edit',
			tags: ctx.tags,
			title: ctx.pageName,
			summary: ctx.editSummary,
			token: canUseMwUserToken ? mw.user.tokens.get('csrfToken') : ctx.csrfToken,
			watchlist: ctx.watchlistOption
		};

		if (typeof ctx.pageSection === 'number') {
			query.section = ctx.pageSection;
		}

		// Set minor edit attribute. If these parameters are present with any value, it is interpreted as true
		if (ctx.minorEdit) {
			query.minor = true;
		} else {
			query.notminor = true;  // force Twinkle config to override user preference setting for "all edits are minor"
		}

		// Set bot edit attribute. If this paramter is present with any value, it is interpreted as true
		if (ctx.botEdit) {
			query.bot = true;
		}

		switch (ctx.editMode) {
			case 'append':
				query.appendtext = ctx.appendText;  // use mode to append to current page contents
				break;
			case 'prepend':
				query.prependtext = ctx.prependText;  // use mode to prepend to current page contents
				break;
			case 'revert':
				query.undo = ctx.revertCurID;
				query.undoafter = ctx.revertOldID;
				if (ctx.lastEditTime) {
					query.basetimestamp = ctx.lastEditTime; // check that page hasn't been edited since it was loaded
				}
				query.starttimestamp = ctx.loadTime; // check that page hasn't been deleted since it was loaded (don't recreate bad stuff)
				break;
			default:
				query.text = ctx.pageText; // replace entire contents of the page
				if (ctx.lastEditTime) {
					query.basetimestamp = ctx.lastEditTime; // check that page hasn't been edited since it was loaded
				}
				query.starttimestamp = ctx.loadTime; // check that page hasn't been deleted since it was loaded (don't recreate bad stuff)
				break;
		}

		if (['recreate', 'createonly', 'nocreate'].indexOf(ctx.createOption) !== -1) {
			query[ctx.createOption] = '';
		}

		if (canUseMwUserToken && ctx.followRedirect) {
			query.redirect = true;
		}

		ctx.saveApi = new Morebits.wiki.api(wgULS('保存页面…', '儲存頁面…'), query, fnSaveSuccess, ctx.statusElement, fnSaveError);
		ctx.saveApi.setParent(this);
		ctx.saveApi.post();
	};

	this.append = function(onSuccess, onFailure) {
		ctx.editMode = 'append';

		if (fnCanUseMwUserToken('edit')) {
			this.save(onSuccess, onFailure);
		} else {
			ctx.onSaveSuccess = onSuccess;
			ctx.onSaveFailure = onFailure || emptyFunction;
			this.load(fnAutoSave, ctx.onSaveFailure);
		}
	};

	this.prepend = function(onSuccess, onFailure) {
		ctx.editMode = 'prepend';

		if (fnCanUseMwUserToken('edit')) {
			this.save(onSuccess, onFailure);
		} else {
			ctx.onSaveSuccess = onSuccess;
			ctx.onSaveFailure = onFailure || emptyFunction;
			this.load(fnAutoSave, ctx.onSaveFailure);
		}
	};

	this.lookupCreator = function(onSuccess) {
		if (!onSuccess) {
			ctx.statusElement.error('内部错误：未给lookupCreator()提供onSuccess回调函数！');
			return;
		}
		ctx.onLookupCreatorSuccess = onSuccess;

		var query = {
			'action': 'query',
			'prop': 'revisions',
			'titles': ctx.pageName,
			'rvlimit': 1,
			'rvprop': 'user',
			'rvdir': 'newer'
		};

		if (ctx.followRedirect) {
			query.redirects = '';  // follow all redirects
		}

		ctx.lookupCreatorApi = new Morebits.wiki.api(wgULS('抓取页面创建者信息', '擷取頁面建立者資訊'), query, fnLookupCreatorSuccess, ctx.statusElement);
		ctx.lookupCreatorApi.setParent(this);
		ctx.lookupCreatorApi.post();
	};

	this.patrol = function() {
		// There's no patrol link on page, so we can't patrol
		if (!$('.patrollink').length) {
			return;
		}

		// Extract the rcid token from the "Mark page as patrolled" link on page
		var patrolhref = $('.patrollink a').attr('href'),
			rcid = mw.util.getParamValue('rcid', patrolhref);

		if (rcid) {

			var patrolstat = new Morebits.status(wgULS('标记页面为已巡查', '標記頁面為已巡查'));

			var wikipedia_api = new Morebits.wiki.api(wgULS('进行中…', '進行中…'), {
				action: 'patrol',
				rcid: rcid,
				token: mw.user.tokens.get('patrolToken')
			}, null, patrolstat);

			// We don't really care about the response
			wikipedia_api.post();
		}
	};

	this.revert = function(onSuccess, onFailure) {
		ctx.onSaveSuccess = onSuccess;
		ctx.onSaveFailure = onFailure || emptyFunction;

		if (!ctx.revertOldID) {
			ctx.statusElement.error('内部错误：回退前未提供修订版本ID！');
			ctx.onSaveFailure(this);
			return;
		}

		ctx.editMode = 'revert';
		this.load(fnAutoSave, ctx.onSaveFailure);
	};

	this.move = function(onSuccess, onFailure) {
		ctx.onMoveSuccess = onSuccess;
		ctx.onMoveFailure = onFailure || emptyFunction;

		if (!ctx.editSummary) {
			ctx.statusElement.error('内部错误：移动前未提供理由（使用setEditSummary函数）！');
			ctx.onMoveFailure(this);
			return;
		}
		if (!ctx.moveDestination) {
			ctx.statusElement.error('内部错误：移动前未指定目标页面！');
			ctx.onMoveFailure(this);
			return;
		}

		var query = {
			action: 'query',
			prop: 'info',
			intoken: 'move',
			titles: ctx.pageName
		};
		if (ctx.followRedirect) {
			query.redirects = '';  // follow all redirects
		}
		if (Morebits.userIsInGroup('sysop')) {
			query.inprop = 'protection';
		}

		ctx.moveApi = new Morebits.wiki.api(wgULS('抓取移动令牌…', '擷取移動權杖…'), query, fnProcessMove, ctx.statusElement, ctx.onMoveFailure);
		ctx.moveApi.setParent(this);
		ctx.moveApi.post();
	};

	// |delete| is a reserved word in some flavours of JS
	this.deletePage = function(onSuccess, onFailure) {
		ctx.onDeleteSuccess = onSuccess;
		ctx.onDeleteFailure = onFailure || emptyFunction;

		// if a non-admin tries to do this, don't bother
		if (!Morebits.userIsInGroup('sysop')) {
			ctx.statusElement.error('不能删除页面：只有管理员可进行该操作');
			ctx.onDeleteFailure(this);
			return;
		}
		if (!ctx.editSummary) {
			ctx.statusElement.error('内部错误：删除前未提供理由（使用setEditSummary函数）！');
			ctx.onDeleteFailure(this);
			return;
		}

		if (fnCanUseMwUserToken('delete')) {
			fnProcessDelete.call(this, this);
		} else {
			var query = {
				action: 'query',
				prop: 'info',
				inprop: 'protection',
				intoken: 'delete',
				titles: ctx.pageName
			};
			if (ctx.followRedirect) {
				query.redirects = '';  // follow all redirects
			}

			ctx.deleteApi = new Morebits.wiki.api(wgULS('抓取删除令牌…', '擷取刪除權杖…'), query, fnProcessDelete, ctx.statusElement, ctx.onDeleteFailure);
			ctx.deleteApi.setParent(this);
			ctx.deleteApi.post();
		}
	};

	this.protect = function(onSuccess, onFailure) {
		ctx.onProtectSuccess = onSuccess;
		ctx.onProtectFailure = onFailure || emptyFunction;

		// if a non-admin tries to do this, don't bother
		if (!Morebits.userIsInGroup('sysop')) {
			ctx.statusElement.error('不能保护页面：只有管理员可进行该操作');
			ctx.onProtectFailure(this);
			return;
		}
		if (!ctx.protectEdit && !ctx.protectMove && !ctx.protectCreate) {
			ctx.statusElement.error('内部错误：调用protect()前未设置编辑和/或移动和/或白纸保护！');
			ctx.onProtectFailure(this);
			return;
		}
		if (!ctx.editSummary) {
			ctx.statusElement.error('内部错误：保护前未提供理由（使用setEditSummary函数）！');
			ctx.onProtectFailure(this);
			return;
		}

		// because of the way MW API interprets protection levels (absolute, not
		// differential), we need to request protection levels from the server
		var query = {
			action: 'query',
			prop: 'info',
			inprop: 'protection',
			intoken: 'protect',
			titles: ctx.pageName,
			watchlist: ctx.watchlistOption
		};
		if (ctx.followRedirect) {
			query.redirects = '';  // follow all redirects
		}

		ctx.protectApi = new Morebits.wiki.api(wgULS('抓取保护令牌…', '擷取保護權杖…'), query, fnProcessProtect, ctx.statusElement, ctx.onProtectFailure);
		ctx.protectApi.setParent(this);
		ctx.protectApi.post();
	};

	// apply FlaggedRevs protection-style settings
	// only works where $wgFlaggedRevsProtection = true (i.e. where FlaggedRevs
	// settings appear on the wiki's "protect" tab)
	this.stabilize = function(onSuccess, onFailure) {
		ctx.onStabilizeSuccess = onSuccess;
		ctx.onStabilizeFailure = onFailure || emptyFunction;

		// if a non-admin tries to do this, don't bother
		if (!Morebits.userIsInGroup('sysop')) {
			ctx.statusElement.error('不能应用FlaggedRevs设定：只有管理员能这么做');
			ctx.onStabilizeFailure(this);
			return;
		}
		if (!ctx.flaggedRevs) {
			ctx.statusElement.error('内部错误：调用stabilize()前必须设置flaggedRevs！');
			ctx.onStabilizeFailure(this);
			return;
		}
		if (!ctx.editSummary) {
			ctx.statusElement.error('内部错误：调用stabilize()前未提供理由（用setEditSummary函数）！');
			ctx.onStabilizeFailure(this);
			return;
		}

		var query = {
			action: 'query',
			prop: 'info|flagged',
			intoken: 'edit',
			titles: ctx.pageName
		};
		if (ctx.followRedirect) {
			query.redirects = '';  // follow all redirects
		}

		ctx.stabilizeApi = new Morebits.wiki.api('抓取stabilize令牌…', query, fnProcessStabilize, ctx.statusElement, ctx.onStabilizeFailure);
		ctx.stabilizeApi.setParent(this);
		ctx.stabilizeApi.post();
	};

	/* Private member functions
	 *
	 * These are not exposed outside
	 */

	/**
	 * Determines whether we can save an API call by using the edit token sent with the page
	 * HTML, or whether we need to ask the server for more info (e.g. protection expiry).
	 *
	 * Currently only used for append, prepend, and deletePage.
	 *
	 * @param {string} action  The action being undertaken, e.g. "edit", "delete".
	 */
	var fnCanUseMwUserToken = function(action) {
		// API-based redirect resolution only works for action=query and
		// action=edit in append/prepend modes (and section=new, but we don't
		// really support that)
		if (ctx.followRedirect && (action !== 'edit' ||
			(ctx.editMode !== 'append' && ctx.editMode !== 'prepend'))) {
			return false;
		}

		// do we need to fetch the edit protection expiry?
		if (Morebits.userIsInGroup('sysop') && !ctx.suppressProtectWarning) {
			// poor man's normalisation
			if (Morebits.string.toUpperCaseFirstChar(mw.config.get('wgPageName')).replace(/ /g, '_').trim() !==
				Morebits.string.toUpperCaseFirstChar(ctx.pageName).replace(/ /g, '_').trim()) {
				return false;
			}

			var editRestriction = mw.config.get('wgRestrictionEdit');
			if (!editRestriction || editRestriction.indexOf('sysop') !== -1) {
				return false;
			}
		}

		return !!mw.user.tokens.get('csrfToken');
	};

	// callback from loadSuccess() for append() and prepend() threads
	var fnAutoSave = function(pageobj) {
		pageobj.save(ctx.onSaveSuccess, ctx.onSaveFailure);
	};

	// callback from loadApi.post()
	var fnLoadSuccess = function() {
		var xml = ctx.loadApi.getXML();

		if (!fnCheckPageName(xml, ctx.onLoadFailure)) {
			return; // abort
		}

		ctx.pageExists = $(xml).find('page').attr('missing') !== '';
		if (ctx.pageExists) {
			ctx.pageText = $(xml).find('rev').text();
		} else {
			ctx.pageText = '';  // allow for concatenation, etc.
		}

		// extract protection info, to alert admins when they are about to edit a protected page
		if (Morebits.userIsInGroup('sysop')) {
			var editprot = $(xml).find('pr[type="edit"]');
			if (editprot.length > 0 && editprot.attr('level') === 'sysop') {
				ctx.fullyProtected = editprot.attr('expiry');
			} else {
				ctx.fullyProtected = false;
			}
		}

		ctx.csrfToken = $(xml).find('page').attr('csrfToken');
		if (!ctx.csrfToken) {
			ctx.statusElement.error(wgULS('未能抓取编辑令牌。', '未能擷取編輯權杖。'));
			ctx.onLoadFailure(this);
			return;
		}
		ctx.loadTime = $(xml).find('page').attr('starttimestamp');
		if (!ctx.loadTime) {
			ctx.statusElement.error(wgULS('未能抓取起始时间戳。', '未能擷取起始時間戳'));
			ctx.onLoadFailure(this);
			return;
		}
		ctx.lastEditTime = $(xml).find('rev').attr('timestamp');
		ctx.revertCurID = $(xml).find('page').attr('lastrevid');

		if (ctx.editMode === 'revert') {
			ctx.revertCurID = $(xml).find('rev').attr('revid');
			if (!ctx.revertCurID) {
				ctx.statusElement.error(wgULS('未能抓取当前修订版本ID。', '未能擷取目前變更版本ID。'));
				ctx.onLoadFailure(this);
				return;
			}
			ctx.revertUser = $(xml).find('rev').attr('user');
			if (!ctx.revertUser) {
				if ($(xml).find('rev').attr('userhidden') === '') {  // username was RevDel'd or oversighted
					ctx.revertUser = wgULS('<用户名已隐藏>', '<用戶名已隱藏>');
				} else {
					ctx.statusElement.error(wgULS('未能抓取此修订版本的编辑者。', '未能擷取此變更版本的編輯者。'));
					ctx.onLoadFailure(this);
					return;
				}
			}
			// set revert edit summary
			ctx.editSummary = '[[w:WP:UNDO|取消]]由 ' + ctx.revertUser + ' 所做出的' + wgULS('修订 ', '變更 ') + ctx.revertOldID + '：' + ctx.editSummary;
		}

		ctx.pageLoaded = true;

		// alert("Generate edit conflict now");  // for testing edit conflict recovery logic
		ctx.onLoadSuccess(this);  // invoke callback
	};

	// helper function to parse the page name returned from the API
	var fnCheckPageName = function(xml, onFailure) {
		if (!onFailure) {
			onFailure = emptyFunction;
		}

		// check for invalid titles
		if ($(xml).find('page').attr('invalid')) {
			ctx.statusElement.error(wgULS('标题不合法：', '標題不合法：') + ctx.pageName);
			onFailure(this);
			return false; // abort
		}

		// retrieve actual title of the page after normalization and redirects
		if ($(xml).find('page').attr('title')) {
			var resolvedName = $(xml).find('page').attr('title');

			// only notify user for redirects, not normalization
			if ($(xml).find('redirects').length > 0) {
				Morebits.status.info('Info', wgULS('从 ', '從 ') + ctx.pageName + ' 重定向到 ' + resolvedName);
			}
			ctx.pageName = resolvedName;  // always update in case of normalization
		} else {
			// could be a circular redirect or other problem
			ctx.statusElement.error(wgULS('不能解释页面的重定向：', '不能解釋頁面的重定向：') + ctx.pageName);
			onFailure(this);

			// force error to stay on the screen
			++Morebits.wiki.numberOfActionsLeft;
			return false; // abort
		}
		return true; // all OK
	};

	// callback from saveApi.post()
	var fnSaveSuccess = function() {
		ctx.editMode = 'all';  // cancel append/prepend/revert modes
		var xml = ctx.saveApi.getXML();

		// see if the API thinks we were successful
		if ($(xml).find('edit').attr('result') === 'Success') {

			// real success
			// default on success action - display link for edited page
			var link = document.createElement('a');
			link.setAttribute('href', mw.util.getUrl(ctx.pageName));
			link.appendChild(document.createTextNode(ctx.pageName));
			ctx.statusElement.info(['完成（', link, '）']);
			if (ctx.onSaveSuccess) {
				ctx.onSaveSuccess(this);  // invoke callback
			}
			return;
		}

		// errors here are only generated by extensions which hook APIEditBeforeSave within MediaWiki
		// Wikimedia wikis should only return spam blacklist errors, captchas, and AbuseFilter messages
		var $editNode = $(xml).find('edit');
		var blacklist = $editNode.attr('spamblacklist');

		if (blacklist) {
			var code = document.createElement('code');
			code.style.fontFamily = 'monospace';
			code.appendChild(document.createTextNode(blacklist));
			ctx.statusElement.error(wgULS(['不能保存页面，因URL ', code, ' 在垃圾黑名单中。'],
				['不能儲存頁面，因URL ', code, ' 在垃圾黑名單中。']));
		} else if ($(xml).find('captcha').length > 0) {
			ctx.statusElement.error(wgULS('不能保存页面，因服务器试图让您完成一个全自动区分计算机和人类的图灵测试。',
				'不能儲存頁面，因伺服器試圖讓您完成一個全自動區分電腦和人類的圖靈測試。'));
		} else if ($editNode.attr('code') === 'abusefilter-disallowed') {
			ctx.statusElement.error(wgULS('编辑被防滥用过滤器规则“' + $editNode.attr('info').substring(17) + '”阻止。如果您认为您的该次编辑是有意义的，请至 Wikipedia:防滥用过滤器/错误报告 提报。',
										 '編輯被防濫用過濾器規則「' + $editNode.attr('info').substring(17) + '」阻止。如果您認為您的該次編輯是有意義的，請至 Wikipedia:防濫用過濾器/錯誤報告 提報。'));
		} else if ($editNode.attr('info').indexOf('Hit AbuseFilter:') === 0) {
			var div = document.createElement('div');
			div.className = 'toccolours';
			div.style.fontWeight = 'normal';
			div.style.color = 'black';
			div.innerHTML = $editNode.attr('warning');
			ctx.statusElement.error(wgULS([ '防滥用过滤器给出了如下警告：', div, '如果您仍希望做出该编辑，请尝试重新提交，根据过滤器的设置您可能可以作出此编辑。' ],
				[ '防濫用過濾器給出了如下警告：', div, '如果您仍希望做出該編輯，請嘗試重新提交，根據過濾器的設定您可能可以作出此編輯。' ]));
			// XXX provide the user with a way to automatically retry the action if they so choose -
			// I can't see how to do this without creating a UI dependency on Morebits.wiki.page though -- TTO
		} else {
			ctx.statusElement.error(wgULS('保存页面时由API得到未知错误', '儲存頁面時由API得到未知錯誤'));
		}

		// force error to stay on the screen
		++Morebits.wiki.numberOfActionsLeft;

		ctx.onSaveFailure(this);
	};

	// callback from saveApi.post()
	var fnSaveError = function() {

		var errorCode = ctx.saveApi.getErrorCode();

		// check for edit conflict
		if (errorCode === 'editconflict' && ctx.conflictRetries++ < ctx.maxConflictRetries) {

			// edit conflicts can occur when the page needs to be purged from the server cache
			var purgeQuery = {
				action: 'purge',
				titles: ctx.pageName  // redirects are already resolved
			};

			var purgeApi = new Morebits.wiki.api(wgULS('检测到编辑冲突，更新服务器缓存', '檢測到編輯衝突，更新伺服器快取'), purgeQuery, null, ctx.statusElement);
			purgeApi.post({ async: false });  // just wait for it, result is for debugging

			--Morebits.wiki.numberOfActionsLeft;  // allow for normal completion if retry succeeds

			ctx.statusElement.info(wgULS('检测到编辑冲突，重试修改', '檢測到編輯衝突，重試修改'));
			if (fnCanUseMwUserToken('edit')) {
				ctx.saveApi.post(); // necessarily append or prepend, so this should work as desired
			} else {
				ctx.loadApi.post(); // reload the page and reapply the edit
			}

		// check for loss of edit token
		// it's impractical to request a new token here, so invoke edit conflict logic when this happens
		} else if (errorCode === 'notoken' && ctx.conflictRetries++ < ctx.maxConflictRetries) {

			ctx.statusElement.info(wgULS('编辑令牌不可用，重试', '編輯權杖不可用，重試'));
			--Morebits.wiki.numberOfActionsLeft;  // allow for normal completion if retry succeeds
			if (fnCanUseMwUserToken('edit')) {
				this.load(fnAutoSave, ctx.onSaveFailure); // try the append or prepend again
			} else {
				ctx.loadApi.post(); // reload the page and reapply the edit
			}

		// check for network or server error
		} else if (errorCode === 'undefined' && ctx.retries++ < ctx.maxRetries) {

			// the error might be transient, so try again
			ctx.statusElement.info(wgULS('保存失败，重试', '儲存失敗，重試'));
			--Morebits.wiki.numberOfActionsLeft;  // allow for normal completion if retry succeeds
			ctx.saveApi.post(); // give it another go!

		// hard error, give up
		} else {

			// non-admin attempting to edit a protected page - this gives a friendlier message than the default
			if (errorCode === 'protectedpage') {
				ctx.statusElement.error(wgULS('不能保存修改：页面被全保护', '不能儲存修改：頁面被全保護'));
			} else if (errorCode === 'hookaborted') {
				ctx.statusElement.error(wgULS('不能保存修改：被防滥用过滤器阻止', '不能儲存修改：被防濫用過濾器阻止'));
			} else {
				ctx.statusElement.error(wgULS('不能保存修改：', '不能儲存修改：') + ctx.saveApi.getErrorText());
			}
			ctx.editMode = 'all';  // cancel append/prepend/revert modes
			if (ctx.onSaveFailure) {
				ctx.onSaveFailure(this);  // invoke callback
			}
		}
	};

	var fnLookupCreatorSuccess = function() {
		var xml = ctx.lookupCreatorApi.getXML();

		if (!fnCheckPageName(xml)) {
			return; // abort
		}

		ctx.creator = $(xml).find('rev').attr('user');
		if (!ctx.creator) {
			ctx.statusElement.error(wgULS('不能获取页面创建者的名字', '無法取得頁面建立者的名字'));
			return;
		}
		ctx.onLookupCreatorSuccess(this);
	};

	var fnProcessMove = function() {
		var xml = ctx.moveApi.getXML();

		if ($(xml).find('page').attr('missing') === '') {
			ctx.statusElement.error(wgULS('不能移动页面，因其已不存在', '無法移動頁面，因其已不存在'));
			ctx.onMoveFailure(this);
			return;
		}

		// extract protection info
		if (Morebits.userIsInGroup('sysop')) {
			var editprot = $(xml).find('pr[type="edit"]');
			if (editprot.length > 0 && editprot.attr('level') === 'sysop' && !ctx.suppressProtectWarning &&
				!confirm(wgULS('您即将移动全保护页面“', '您即將移動全保護頁面「') + ctx.pageName + wgULS('”', '」') +
				(editprot.attr('expiry') === 'infinity' ? '（永久）' : '（到期：' + editprot.attr('expiry') + '）') +
				wgULS('。\n\n点击确定以确定，或点击取消以取消。', '。\n\n點選確定以繼續，或點選取消以取消。'))) {
				ctx.statusElement.error(wgULS('对全保护页面的移动已取消。', '對全保護頁面的移動已取消。'));
				ctx.onMoveFailure(this);
				return;
			}
		}

		var moveToken = $(xml).find('page').attr('movetoken');
		if (!moveToken) {
			ctx.statusElement.error(wgULS('不能抓取移动令牌。', '不能擷取移動權杖。'));
			ctx.onMoveFailure(this);
			return;
		}

		var query = {
			'action': 'move',
			'tags': ctx.tags,
			'from': $(xml).find('page').attr('title'),
			'to': ctx.moveDestination,
			'token': moveToken,
			'reason': ctx.editSummary
		};
		if (ctx.moveTalkPage) {
			query.movetalk = 'true';
		}
		if (ctx.moveSubpages) {
			query.movesubpages = 'true';  // XXX don't know whether this works for non-admins
		}
		if (ctx.moveSuppressRedirect) {
			query.noredirect = 'true';
		}
		if (ctx.watchlistOption === 'watch') {
			query.watch = 'true';
		}

		ctx.moveProcessApi = new Morebits.wiki.api(wgULS('移动页面…', '移動頁面…'), query, ctx.onMoveSuccess, ctx.statusElement, ctx.onMoveFailure);
		ctx.moveProcessApi.setParent(this);
		ctx.moveProcessApi.post();
	};

	var fnProcessDelete = function() {
		var pageTitle, token;

		if (fnCanUseMwUserToken('delete')) {
			token = mw.user.tokens.get('csrfToken');
			pageTitle = ctx.pageName;
		} else {
			var xml = ctx.deleteApi.getXML();

			if ($(xml).find('page').attr('missing') === '') {
				ctx.statusElement.error(wgULS('不能删除页面，因其已不存在', '不能刪除頁面，因其已不存在'));
				ctx.onDeleteFailure(this);
				return;
			}

			// extract protection info
			var editprot = $(xml).find('pr[type="edit"]');
			if (editprot.length > 0 && editprot.attr('level') === 'sysop' && !ctx.suppressProtectWarning &&
				!confirm(wgULS('您即将删除全保护页面“' + ctx.pageName + '”', '您即將刪除全保護頁面「' + ctx.pageName + '」') +
				(editprot.attr('expiry') === 'infinity' ? '（永久）' : '（到期 ' + editprot.attr('expiry') + '）') +
				wgULS('。\n\n点击确定以确定，或点击取消以取消。', '。\n\n點選確定以確定，或點選取消以取消。'))) {
				ctx.statusElement.error(wgULS('对全保护页面的删除已取消。', '對全保護頁面的刪除已取消。'));
				ctx.onDeleteFailure(this);
				return;
			}

			token = $(xml).find('page').attr('deletetoken');
			if (!token) {
				ctx.statusElement.error(wgULS('不能抓取删除令牌。', '不能擷取刪除權杖。'));
				ctx.onDeleteFailure(this);
				return;
			}

			pageTitle = $(xml).find('page').attr('title');
		}

		var query = {
			'action': 'delete',
			'tags': ctx.tags,
			'title': pageTitle,
			'token': token,
			'reason': ctx.editSummary
		};
		if (ctx.watchlistOption === 'watch') {
			query.watch = 'true';
		}

		ctx.deleteProcessApi = new Morebits.wiki.api(wgULS('删除页面…', '刪除頁面…'), query, ctx.onDeleteSuccess, ctx.statusElement, fnProcessDeleteError);
		ctx.deleteProcessApi.setParent(this);
		ctx.deleteProcessApi.post();
	};

	// callback from deleteProcessApi.post()
	var fnProcessDeleteError = function() {

		var errorCode = ctx.deleteProcessApi.getErrorCode();

		// check for "Database query error"
		if (errorCode === 'internal_api_error_DBQueryError' && ctx.retries++ < ctx.maxRetries) {

			ctx.statusElement.info(wgULS('数据库查询错误，重试', '資料庫查詢錯誤，重試'));
			--Morebits.wiki.numberOfActionsLeft;  // allow for normal completion if retry succeeds
			ctx.deleteProcessApi.post(); // give it another go!

		} else if (errorCode === 'badtoken') {
			// this is pathetic, but given the current state of Morebits.wiki.page it would
			// be a dog's breakfast to try and fix this
			ctx.statusElement.error(wgULS('无效令牌，请刷新页面并重试。', '無效權杖，請重新整理頁面並重試。'));
			if (ctx.onDeleteFailure) {
				ctx.onDeleteFailure.call(this, this, ctx.deleteProcessApi);
			}

		} else if (errorCode === 'missingtitle') {

			ctx.statusElement.error(wgULS('不能删除页面，因其已不存在', '不能刪除頁面，因其已不存在'));
			if (ctx.onDeleteFailure) {
				ctx.onDeleteFailure.call(this, ctx.deleteProcessApi);  // invoke callback
			}

		// hard error, give up
		} else {

			ctx.statusElement.error(wgULS('不能删除页面：', '不能刪除頁面：') + ctx.deleteProcessApi.getErrorText());
			if (ctx.onDeleteFailure) {
				ctx.onDeleteFailure.call(this, ctx.deleteProcessApi);  // invoke callback
			}
		}
	};

	var fnProcessProtect = function() {
		var xml = ctx.protectApi.getXML();

		var missing = $(xml).find('page').attr('missing') === '';
		if ((ctx.protectEdit || ctx.protectMove) && missing) {
			ctx.statusElement.error(wgULS('不能保护页面，因其已不存在', '不能保護頁面，因其已不存在'));
			ctx.onProtectFailure(this);
			return;
		}
		if (ctx.protectCreate && !missing) {
			ctx.statusElement.error(wgULS('不能白纸保护页面，因其已存在', '不能白紙保護頁面，因其已存在'));
			ctx.onProtectFailure(this);
			return;
		}

		// TODO cascading protection not possible on edit<sysop

		var protectToken = $(xml).find('page').attr('protecttoken');
		if (!protectToken) {
			ctx.statusElement.error(wgULS('不能抓取保护令牌。', '不能擷取保護權杖。'));
			ctx.onProtectFailure(this);
			return;
		}

		// fetch existing protection levels
		var prs = $(xml).find('pr');
		var editprot = prs.filter('[type="edit"]');
		var moveprot = prs.filter('[type="move"]');
		var createprot = prs.filter('[type="create"]');

		var protections = [], expirys = [];

		// set edit protection level
		if (ctx.protectEdit) {
			protections.push('edit=' + ctx.protectEdit.level);
			expirys.push(ctx.protectEdit.expiry);
		} else if (editprot.length) {
			protections.push('edit=' + editprot.attr('level'));
			expirys.push(editprot.attr('expiry').replace('infinity', 'indefinite'));
		}

		if (ctx.protectMove) {
			protections.push('move=' + ctx.protectMove.level);
			expirys.push(ctx.protectMove.expiry);
		} else if (moveprot.length) {
			protections.push('move=' + moveprot.attr('level'));
			expirys.push(moveprot.attr('expiry').replace('infinity', 'indefinite'));
		}

		if (ctx.protectCreate) {
			protections.push('create=' + ctx.protectCreate.level);
			expirys.push(ctx.protectCreate.expiry);
		} else if (createprot.length) {
			protections.push('create=' + createprot.attr('level'));
			expirys.push(createprot.attr('expiry').replace('infinity', 'indefinite'));
		}

		var query = {
			action: 'protect',
			tags: ctx.tags,
			title: $(xml).find('page').attr('title'),
			token: protectToken,
			protections: protections.join('|'),
			expiry: expirys.join('|'),
			reason: ctx.editSummary
		};
		if (ctx.protectCascade) {
			query.cascade = 'true';
		}
		if (ctx.watchlistOption === 'watch') {
			query.watch = 'true';
		}

		ctx.protectProcessApi = new Morebits.wiki.api(wgULS('保护页面…', '保護頁面…'), query, ctx.onProtectSuccess, ctx.statusElement, ctx.onProtectFailure);
		ctx.protectProcessApi.setParent(this);
		ctx.protectProcessApi.post();
	};

	var fnProcessStabilize = function() {
		var xml = ctx.stabilizeApi.getXML();

		var missing = $(xml).find('page').attr('missing') === '';
		if (missing) {
			ctx.statusElement.error('不能保护页面，因其已不存在');
			ctx.onStabilizeFailure(this);
			return;
		}

		var stabilizeToken = $(xml).find('page').attr('csrfToken');
		if (!stabilizeToken) {
			ctx.statusElement.error('不能抓取stabilize令牌。');
			ctx.onStabilizeFailure(this);
			return;
		}

		var query = {
			action: 'stabilize',
			title: $(xml).find('page').attr('title'),
			token: stabilizeToken,
			protectlevel: ctx.flaggedRevs.level,
			expiry: ctx.flaggedRevs.expiry,
			reason: ctx.editSummary
		};
		if (ctx.watchlistOption === 'watch') {
			query.watch = 'true';
		}

		ctx.stabilizeProcessApi = new Morebits.wiki.api('配置stabilization设定…', query, ctx.onStabilizeSuccess, ctx.statusElement, ctx.onStabilizeFailure);
		ctx.stabilizeProcessApi.setParent(this);
		ctx.stabilizeProcessApi.post();
	};
}; // end Morebits.wiki.page

/** Morebits.wiki.page TODO: (XXX)
 * - Should we retry loads also?
 * - Need to reset current action before the save?
 * - Deal with action.completed stuff
 * - Need to reset all parameters once done (e.g. edit summary, move destination, etc.)
 */


/**
 * **************** Morebits.wiki.flow ****************
 * 目前只有两个功能：添加讨论和编辑描述。
 *
 * 由于Flow讨论板不同于普通页面，各贴是相对独立的页面，因此page的API与类型的设计
 * 并不完全适用于Flow页面。如果需要更多功能，可能需要重构orz。
 *
 * Callers are not permitted to directly access the properties of this class!
 * All property access is through the appropriate get___() or set___() method.
 *
 * Callers should set Morebits.wiki.actionCompleted.notice and Morebits.wiki.actionCompleted.redirect
 * before the first call to Morebits.wiki.flow.newTopic() and Morebits.wiki.flow.editHeader().
 *
 * Each of the callback functions takes one parameter, which is a
 * reference to the Morebits.wiki.page object that registered the callback.
 * Callback functions may invoke any Morebits.wiki.page prototype method using this reference.
 *
 *
 * 公有方法：
 * check(title, callbackOnFlow, callbackOnNonFlow, onError): 检查一个标题是否为Flow页面
 *     title - 页面标题
 *     callbackOnFlow - 回调函数，确认为Flow页面时调用
 *     callbackOnNonFlow - 回调函数，确认不是Flow页面时调用
 *     onError - 调用API发生错误时的回调函数
 *
 * relevantUserName(): 如果没有Flow，直接用mw.config.get('wgRelevantUserName')就行了。
 *
 * Constructor: Morebits.wiki.flow(pageName, currentAction)
 *    pageName - the name of the page, prefixed by the namespace (if any)
 *               (for the current page, use mw.config.get('wgPageName'))。现在请勿使用Topic:xxxxx。
 *    currentAction - a string describing the action about to be undertaken (optional)
 *
 * newTopic(onSuccess, onFailure): 向讨论中加入新留言.
 *    onSuccess - callback function which is called when the save has succeeded (optional)
 *    onFailure - callback function which is called when the save fails (optional)
 *
 * viewHeader(onSuccess, onFailure): 加载Flow讨论页描述。
 *    onSuccess - callback function which is called when the method has succeeded (optional)
 *    onFailure - callback function which is called when the method fails (optional)
 *
 * editHeader(onSuccess, onFailure): 编辑Flow讨论页描述。请先调用loadHeader()
 *    onSuccess - callback function which is called when the method has succeeded (optional)
 *    onFailure - callback function which is called when the method fails (optional)
 *
 * getHeader(): 返回Flow讨论页描述。需要先调用loadHeader()
 *
 * setHeader(header)
 *    header - Flow讨论页描述
 *
 * setTopic(topic)
 *    topic - 新讨论的标题
 *
 * setContent(content)
 *    content - 新讨论的内容，wikicode
 *
 * setCallbackParameters(callbackParameters)
 *    callbackParameters - an object for use in a callback function
 *
 * getCallbackParameters(): returns the object previous set by setCallbackParameters()
 *
 *    Callback notes: callbackParameters is for use by the caller only. The parameters
 *                    allow a caller to pass the proper context into its callback function.
 *                    Callers must ensure that any changes to the callbackParameters object
 *                    within a load() callback still permit a proper re-entry into the
 *                    load() callback if an edit conflict is detected upon calling save().
 *
 */

Morebits.wiki.flow = function(pageName, currentAction) {

	if (!currentAction) {
		currentAction = '打开页面“' + pageName + '”';
	}

	/**
     * Private context variables
     *
     * This context is not visible to the outside, thus all the data here
     * must be accessed via getter and setter functions.
     */
	var ctx = {
		// backing fields for public properties
		pageName: pageName,
		// isFlow: null,
		callbackParameters: null,
		statusElement: new Morebits.status(currentAction),
		// - edit
		header: null,
		headerLastRevision: null,
		topic: null,
		content: null,
		//        watchlistOption: 'nochange',
		// internal status
		headerLoaded: false,
		csrfToken: null,
		// loadTime: null,
		// lastEditTime: null,
		// revertCurID: null,
		// revertUser: null,
		fullyProtected: false,
		suppressProtectWarning: false,
		// conflictRetries: 0,
		// retries: 0,
		// callbacks
		onNewTopicSuccess: null,
		onNewTopicFailure: null,
		onViewHeaderSuccess: null,
		onViewHeaderFailure: null,
		onEditHeaderSuccess: null,
		onEditHeaderFailure: null,
		// internal objects
		newTopicApi: null,
		viewHeaderApi: null,
		editHeaderApi: null
	};

	var emptyFunction = function() { };

	/**
     * Public interface accessors
     */
	this.getPageName = function() {
		return ctx.pageName;
	};

	this.getHeader = function() {
		return ctx.header;
	};

	this.setHeader = function(header) {
		ctx.header = header;
	};

	this.getTopic = function() {
		return ctx.topic;
	};

	this.setTopic = function(topic) {
		ctx.topic = topic;
	};

	this.getContent = function() {
		return ctx.content;
	};

	this.setContent = function(content) {
		ctx.content = content;
	};

	this.setCallbackParameters = function(callbackParameters) {
		ctx.callbackParameters = callbackParameters;
	};

	this.getCallbackParameters = function() {
		return ctx.callbackParameters;
	};

	this.getStatusElement = function() {
		return ctx.statusElement;
	};


	// Save updated .pageText to Wikipedia
	// Only valid after successful .load()
	this.newTopic = function(onSuccess, onFailure) {
		ctx.onNewTopicSuccess = onSuccess;
		ctx.onNewTopicFailure = onFailure || emptyFunction;

		var query = {
			action: 'flow',
			page: ctx.pageName,
			token: mw.user.tokens.get('csrfToken'),
			submodule: 'new-topic',
			nttopic: ctx.topic,
			ntcontent: ctx.content,
			ntformat: 'wikitext'
		};

		ctx.newTopicApi = new Morebits.wiki.api('留言…', query, fnNewTopicSuccess, ctx.statusElement, fnNewTopicError);
		ctx.newTopicApi.setParent(this);
		ctx.newTopicApi.post();
	};


	this.viewHeader = function (onSuccess, onFailure) {
		ctx.onViewHeaderSuccess = onSuccess;
		ctx.onViewHeaderFailure = onFailure || emptyFunction;
		// header: null,
		// headerLastRevision: null,
		// headerLoaded

		if (!onSuccess) {
        	ctx.statusElement.error('内部错误：未给viewHeader()提供onSuccess回调函数！');
			ctx.onViewHeaderFailure(this);
			return;
		}

		var query = {
        	action: 'flow',
        	submodule: 'view-header',
        	page: ctx.pageName,
        	vhformat: 'wikitext'
		};

		ctx.viewHeaderApi = new Morebits.wiki.api(wgULS('抓取Flow描述…', '擷取Flow描述…'), query, fnViewHeaderSuccess, ctx.statusElement, ctx.onViewHeaderFailure);
		ctx.viewHeaderApi.setParent(this);
		ctx.viewHeaderApi.post();
	};

	this.editHeader = function (onSuccess, onFailure) {
		ctx.onEditHeaderSuccess = onSuccess;
		ctx.onEditHeaderFailure = onFailure || emptyFunction;

		var query = {
			action: 'flow',
			page: ctx.pageName,
			token: mw.user.tokens.get('csrfToken'),
			submodule: 'edit-header',
			ehprev_revision: ctx.headerLastRevision,
			ehcontent: ctx.header,
			ehformat: 'wikitext'
		};

		ctx.editHeaderApi = new Morebits.wiki.api(wgULS('编辑Flow讨论页描述…', '編輯Flow討論頁描述…'), query, fnEditHeaderSuccess, ctx.statusElement, fnEditHeaderError);
		ctx.editHeaderApi.setParent(this);
		ctx.editHeaderApi.post();
	};


	/* Private member functions
     *
     * These are not exposed outside
     */

	// callback from newTopicApi.post()
	var fnNewTopicSuccess = function() {
		var xml = ctx.newTopicApi.getXML();

		if ($(xml).find('new-topic').attr('status') === 'ok') {
			var link = document.createElement('a');
			link.setAttribute('href', mw.util.getUrl(ctx.pageName));
			link.appendChild(document.createTextNode(ctx.pageName));
			ctx.statusElement.info(['完成（', link, '）']);
			if (ctx.onNewTopicSuccess) {
				ctx.onNewTopicSuccess(this);  // invoke callback
			}
		} else {
			ctx.statusElement.error(wgULS('保存页面时由API得到未知错误', '儲存頁面時由API得到未知錯誤'));

			// force error to stay on the screen
			++Morebits.wiki.numberOfActionsLeft;

			ctx.onNewTopicFailure(this);
		}
	};

	// callback from newTopicApi.post()
	var fnNewTopicError = function() {
		var errorCode = ctx.newTopicApi.getErrorCode();

		if (errorCode === 'invalid-page') {
			ctx.statusElement.error(wgULS('内部错误：不是Flow页面，无法留言', '內部錯誤：不是Flow頁面，無法留言'));
		} else if (errorCode === 'block') {
			ctx.statusElement.error(wgULS('无法留言，因讨论页被保护', '無法留言，因討論頁被保護'));
		} else if (errorCode === 'spamfilter') {
			ctx.statusElement.error(wgULS('无法留言，因为需要验证码或已经触发URL黑名单', '無法留言，因為需要驗證碼或已經觸發URL黑名單'));
		} else {
			ctx.statusElement.error(wgULS('留言时由API得到未知错误', '留言時由API得到未知錯誤'));
		}

		if (ctx.onNewTopicFailure) {
			ctx.onNewTopicFailure(this);  // invoke callback
		}
	};

	var fnViewHeaderSuccess = function() {
    	var xml = ctx.viewHeaderApi.getXML();
		ctx.header = $(xml).find('content').attr('content');
    	ctx.headerLastRevision = $(xml).find('revision').attr('revisionId');
    	ctx.headerLoaded = true;
    	ctx.onViewHeaderSuccess(this);
	};

	var fnEditHeaderSuccess = function() {
		var xml = ctx.editHeaderApi.getXML();

		if ($(xml).find('edit-header').attr('status') === 'ok') {
			ctx.statusElement.info('完成');
			ctx.headerLastRevision = $(xml).find('header').attr('header-revision-id');
			if (ctx.onEditHeaderSuccess) {
				ctx.onEditHeaderSuccess(this);
			}
		} else {
			ctx.statusElement.error(wgULS('保存Flow讨论页描述时由API得到未知错误', '儲存Flow討論頁描述時由API得到未知錯誤'));

			// force error to stay on the screen
			++Morebits.wiki.numberOfActionsLeft;

			ctx.onEditHeaderFailure(this);
		}
	};

	var fnEditHeaderError = function() {
		var errorCode = ctx.editHeaderApi.getErrorCode();

		if (errorCode === 'invalid-page') {
			ctx.statusElement.error(wgULS('内部错误：不是Flow页面，无法编辑描述', '內部錯誤：不是Flow頁面，無法編輯描述'));
		} else if (errorCode === 'block') {
			ctx.statusElement.error(wgULS('无法编辑描述，因讨论页被保护', '無法編輯描述，因討論頁被保護'));
		} else if (errorCode === 'spamfilter') {
			ctx.statusElement.error(wgULS('无法编辑描述，因为需要验证码或已经触发URL黑名单', '無法編輯描述，因為需要驗證碼或已經觸發URL黑名單'));
		} else {
			ctx.statusElement.error(wgULS('编辑描述时由API得到未知错误', '編輯描述時由API得到未知錯誤'));
		}

		if (ctx.onEditHeaderFailure) {
			ctx.onEditHeaderFailure(this);  // invoke callback
		}
	};
};

Morebits.wiki.flow.check = function(title, callbackOnFlow, callbackOnNonFlow, onError) {
	var callback = function (obj) {
		var responseXML = obj.responseXML;
		var pages = responseXML.getElementsByTagName('page');
		if (pages.length > 0) {
			var model = pages[0].getAttribute('contentmodel');
			if (model === 'flow-board') {
				if (typeof callbackOnFlow === 'function') {
					callbackOnFlow();
				}
			} else if (model !== null) {
				if (typeof callbackOnNonFlow === 'function') {
					callbackOnNonFlow();
				}
			} else {
				if (typeof onError === 'function') {
					obj.statelem.error('内部错误：页面标题无效');
					onError(obj);
				}
			}
		} else {
			if (typeof onError === 'function') {
				obj.statelem.error('内部错误：调用API时失败');
				onError(obj);
			}
		}
	};

	var statusElement = new Morebits.status(wgULS('检查是否为Flow页面', '檢查是否為Flow頁面'));
	var checkApi = new Morebits.wiki.api(wgULS('查询页面信息', '檢索頁面信息'), {
		action: 'query',
		prop: 'info',
		titles: title
	}, callback, statusElement, onError);
	checkApi.post();
}; // end Morebits.wiki.flow

Morebits.wiki.flow.relevantUserName = function () {
	// 处理Flow页面的问题
	var name = mw.config.get('wgRelevantUserName');
	if (name) {
		return name;
	} else if (mw.config.get('wgPageContentModel') === 'flow-board') {
		var title = $('a', '#contentSub').attr('title');
		if (title && title.indexOf('User talk:') === 0) {
			return title.substr(10);
		}
		return null;

	}
	return null;

};


/**
 * **************** Morebits.wiki.preview ****************
 * Uses the API to parse a fragment of wikitext and render it as HTML.
 *
 * Constructor: Morebits.wiki.preview(previewbox, currentAction)
 *    previewbox - the <div> element that will contain the rendered HTML
 *
 * beginRender(wikitext): Displays the preview box, and begins an asynchronous attempt
 *                        to render the specified wikitext.
 *    wikitext - wikitext to render; most things should work, including subst: and ~~~~
 *    pageTitle - optional parameter for the page this should be rendered as being on
 *
 * closePreview(): Hides the preview box and clears it.
 *
 * The suggested implementation pattern (in Morebits.simpleWindow + Morebits.quickForm situations) is to
 * construct a Morebits.wiki.preview object after rendering a Morebits.quickForm, and bind the object
 * to an arbitrary property of the form (e.g. |previewer|).  For an example, see
 * twinklewarn.js.
 */

Morebits.wiki.preview = function(previewbox) {
	this.previewbox = previewbox;
	$(previewbox).addClass('morebits-previewbox').hide();

	this.beginRender = function(wikitext, pageTitle) {
		$(previewbox).show();

		var statusspan = document.createElement('span');
		previewbox.appendChild(statusspan);
		Morebits.status.init(statusspan);

		// 如果页面不是wikitext（例如用户js/css、Flow等），那么找一个wikitext页面来预览。
		var pageName = mw.config.get('wgPageName');
		if (mw.config.get('wgPageContentModel') !== 'wikitext') {
			pageName = 'Draft:' + pageName;
		}

		var query = {
			action: 'parse',
			prop: 'text',
			pst: 'true',  // PST = pre-save transform; this makes substitution work properly
			text: wikitext,
			title: pageTitle || pageName
		};
		var renderApi = new Morebits.wiki.api(wgULS('加载中…', '載入中…'), query, fnRenderSuccess, new Morebits.status(wgULS('预览', '預覽')));
		renderApi.post();
	};

	var fnRenderSuccess = function(apiobj) {
		var xml = apiobj.getXML();
		var html = $(xml).find('text').text();
		if (!html) {
			apiobj.statelem.error(wgULS('加载预览失败，或模板被清空', '載入預覽失敗，或模板被清空'));
			return;
		}
		previewbox.innerHTML = html;
		$(previewbox).find('a').attr('target', '_blank');
	};

	this.closePreview = function() {
		$(previewbox).empty().hide();
	};
};



/**
 * **************** Morebits.wikitext ****************
 * Wikitext manipulation
 */

Morebits.wikitext = {};

Morebits.wikitext.template = {
	parse: function(text, start) {
		var count = -1;
		var level = -1;
		var equals = -1;
		var current = '';
		var result = {
			name: '',
			parameters: {}
		};
		var key, value;

		for (var i = start; i < text.length; ++i) {
			var test3 = text.substr(i, 3);
			if (test3 === '{{{') {
				current += '{{{';
				i += 2;
				++level;
				continue;
			}
			if (test3 === '}}}') {
				current += '}}}';
				i += 2;
				--level;
				continue;
			}
			var test2 = text.substr(i, 2);
			if (test2 === '{{' || test2 === '[[') {
				current += test2;
				++i;
				++level;
				continue;
			}
			if (test2 === ']]') {
				current += test2;
				++i;
				--level;
				continue;
			}
			if (test2 === '}}') {
				current += test2;
				++i;
				--level;

				if (level <= 0) {
					if (count === -1) {
						result.name = current.substring(2).trim();
						++count;
					} else {
						if (equals !== -1) {
							key = current.substring(0, equals).trim();
							value = current.substring(equals).trim();
							result.parameters[key] = value;
							equals = -1;
						} else {
							result.parameters[count] = current;
							++count;
						}
					}
					break;
				}
				continue;
			}

			if (text.charAt(i) === '|' && level <= 0) {
				if (count === -1) {
					result.name = current.substring(2).trim();
					++count;
				} else {
					if (equals !== -1) {
						key = current.substring(0, equals).trim();
						value = current.substring(equals + 1).trim();
						result.parameters[key] = value;
						equals = -1;
					} else {
						result.parameters[count] = current;
						++count;
					}
				}
				current = '';
			} else if (equals === -1 && text.charAt(i) === '=' && level <= 0) {
				equals = current.length;
				current += text.charAt(i);
			} else {
				current += text.charAt(i);
			}
		}

		return result;
	}
};

Morebits.wikitext.page = function mediawikiPage(text) {
	this.text = text;
};

Morebits.wikitext.page.prototype = {
	text: '',
	removeLink: function(link_target) {
		var first_char = link_target.substr(0, 1);
		var link_re_string = '[' + first_char.toUpperCase() + first_char.toLowerCase() + ']' + RegExp.escape(link_target.substr(1), true);
		var link_simple_re = new RegExp('\\[\\[:?(' + link_re_string + ')\\]\\]', 'g');
		var link_named_re = new RegExp('\\[\\[:?' + link_re_string + '\\|(.+?)\\]\\]', 'g');
		this.text = this.text.replace(link_simple_re, '$1').replace(link_named_re, '$1');
	},
	commentOutImage: function(image, reason) {
		var unbinder = new Morebits.unbinder(this.text);
		unbinder.unbind('<!--', '-->');

		reason = reason ? reason + '：' : '';
		var first_char = image.substr(0, 1);
		var image_re_string = '[' + first_char.toUpperCase() + first_char.toLowerCase() + ']' + RegExp.escape(image.substr(1), true);

		/*
		 * Check for normal image links, i.e. [[Image:Foobar.png|...]]
		 * Will eat the whole link
		 */
		var links_re = new RegExp('\\[\\[(?:[Ii]mage|[Ff]ile|文件|檔案):\\s*' + image_re_string);
		var allLinks = Morebits.array.uniq(Morebits.string.splitWeightedByKeys(unbinder.content, '[[', ']]'));
		for (var i = 0; i < allLinks.length; ++i) {
			if (links_re.test(allLinks[i])) {
				var replacement = '<!-- ' + reason + allLinks[i] + ' -->';
				unbinder.content = unbinder.content.replace(allLinks[i], replacement, 'g');
			}
		}
		// unbind the newly created comments
		unbinder.unbind('<!--', '-->');

		/*
		 * Check for gallery images, i.e. instances that must start on a new line, eventually preceded with some space, and must include Image: prefix
		 * Will eat the whole line.
		 */
		var gallery_image_re = new RegExp('(^\\s*(?:[Ii]mage|[Ff]ile|文件|檔案):\\s*' + image_re_string + '.*?$)', 'mg');
		unbinder.content = unbinder.content.replace(gallery_image_re, '<!-- ' + reason + '$1 -->');

		// unbind the newly created comments
		unbinder.unbind('<!--', '-->');
		/*
		 * Check free image usages, for example as template arguments, might have the Image: prefix excluded, but must be preceeded by an |
		 * Will only eat the image name and the preceeding bar and an eventual named parameter
		 */
		var free_image_re = new RegExp('(\\|\\s*(?:[\\w\\s]+\\=)?\\s*(?:(?:[Ii]mage|[Ff]ile|文件|檔案):\\s*)?' + image_re_string + ')', 'mg');
		unbinder.content = unbinder.content.replace(free_image_re, '<!-- ' + reason + '$1 -->');

		// Rebind the content now, we are done!
		this.text = unbinder.rebind();
	},
	addToImageComment: function(image, data) {
		var first_char = image.substr(0, 1);
		var first_char_regex = RegExp.escape(first_char, true);
		if (first_char.toUpperCase() !== first_char.toLowerCase()) {
			first_char_regex = '[' + RegExp.escape(first_char.toUpperCase(), true) + RegExp.escape(first_char.toLowerCase(), true) + ']';
		}
		var image_re_string = '(?:[Ii]mage|[Ff]ile|文件|檔案):\\s*' + first_char_regex + RegExp.escape(image.substr(1), true);
		var links_re = new RegExp('\\[\\[' + image_re_string);
		var allLinks = Morebits.array.uniq(Morebits.string.splitWeightedByKeys(this.text, '[[', ']]'));
		for (var i = 0; i < allLinks.length; ++i) {
			if (links_re.test(allLinks[i])) {
				var replacement = allLinks[i];
				// just put it at the end?
				replacement = replacement.replace(/\]\]$/, '|' + data + ']]');
				this.text = this.text.replace(allLinks[i], replacement, 'g');
			}
		}
		var gallery_re = new RegExp('^(\\s*' + image_re_string + '.*?)\\|?(.*?)$', 'mg');
		var newtext = '$1|$2 ' + data;
		this.text = this.text.replace(gallery_re, newtext);
	},
	removeTemplate: function(template) {
		var first_char = template.substr(0, 1);
		var template_re_string = '(?:[Tt]emplate:|模板:)?\\s*[' + first_char.toUpperCase() + first_char.toLowerCase() + ']' + RegExp.escape(template.substr(1), true);
		var links_re = new RegExp('\\{\\{' + template_re_string);
		var allTemplates = Morebits.array.uniq(Morebits.string.splitWeightedByKeys(this.text, '{{', '}}', [ '{{{', '}}}' ]));
		for (var i = 0; i < allTemplates.length; ++i) {
			if (links_re.test(allTemplates[i])) {
				this.text = this.text.replace(allTemplates[i], '', 'g');
			}
		}
	},
	getText: function() {
		return this.text;
	}
};



/**
 * **************** Morebits.queryString ****************
 * Maps the querystring to an object
 *
 * Functions:
 *
 * Morebits.queryString.exists(key)
 *     returns true if the particular key is set
 * Morebits.queryString.get(key)
 *     returns the value associated to the key
 * Morebits.queryString.equals(key, value)
 *     returns true if the value associated with given key equals given value
 * Morebits.queryString.toString()
 *     returns the query string as a string
 * Morebits.queryString.create( hash )
 *     creates an querystring and encodes strings via encodeURIComponent and joins arrays with |
 *
 * In static context, the value of location.search.substring(1), else the value given to the constructor is going to be used. The mapped hash is saved in the object.
 *
 * Example:
 *
 * var value = Morebits.queryString.get('key');
 * var obj = new Morebits.queryString('foo=bar&baz=quux');
 * value = obj.get('foo');
 */
Morebits.queryString = function QueryString(qString) {
	this.string = qString;
	this.params = {};

	if (!qString.length) {
		return;
	}

	qString.replace(/\+/, ' ');
	var args = qString.split('&');

	for (var i = 0; i < args.length; ++i) {
		var pair = args[i].split('=');
		var key = decodeURIComponent(pair[0]), value = key;

		if (pair.length === 2) {
			value = decodeURIComponent(pair[1]);
		}

		this.params[key] = value;
	}
};

Morebits.queryString.staticstr = null;

Morebits.queryString.staticInit = function() {
	if (!Morebits.queryString.staticstr) {
		Morebits.queryString.staticstr = new Morebits.queryString(location.search.substring(1));
	}
};

Morebits.queryString.get = function(key) {
	Morebits.queryString.staticInit();
	return Morebits.queryString.staticstr.get(key);
};

Morebits.queryString.prototype.get = function(key) {
	return this.params[key] ? this.params[key] : null;
};

Morebits.queryString.exists = function(key) {
	Morebits.queryString.staticInit();
	return Morebits.queryString.staticstr.exists(key);
};

Morebits.queryString.prototype.exists = function(key) {
	return !!this.params[key];
};

Morebits.queryString.equals = function(key, value) {
	Morebits.queryString.staticInit();
	return Morebits.queryString.staticstr.equals(key, value);
};

Morebits.queryString.prototype.equals = function(key, value) {
	return this.params[key] === value;
};

Morebits.queryString.toString = function() {
	Morebits.queryString.staticInit();
	return Morebits.queryString.staticstr.toString();
};

Morebits.queryString.prototype.toString = function() {
	return this.string ? this.string : null;
};

Morebits.queryString.create = function(arr) {
	var resarr = [];
	var csrfToken;  // KLUGE: this should always be the last item in the query string (bug TW-B-0013)
	for (var i in arr) {
		if (arr[i] === undefined) {
			continue;
		}
		var res;
		if ($.isArray(arr[i])) {
			var v = [];
			for (var j = 0; j < arr[i].length; ++j) {
				v[j] = encodeURIComponent(arr[i][j]);
			}
			res = v.join('|');
		} else {
			res = encodeURIComponent(arr[i]);
		}
		if (i === 'token') {
			csrfToken = res;
		} else {
			resarr.push(encodeURIComponent(i) + '=' + res);
		}
	}
	if (csrfToken !== undefined) {
		resarr.push('token=' + csrfToken);
	}
	return resarr.join('&');
};
Morebits.queryString.prototype.create = Morebits.queryString.create;



/**
 * **************** Morebits.status ****************
 */

Morebits.status = function Status(text, stat, type) {
	this.textRaw = text;
	this.text = this.codify(text);
	this.type = type || 'status';
	this.generate();
	if (stat) {
		this.update(stat, type);
	}
};

Morebits.status.init = function(root) {
	if (!(root instanceof Element)) {
		throw new Error('对象不是一个Element');
	}
	while (root.hasChildNodes()) {
		root.removeChild(root.firstChild);
	}
	Morebits.status.root = root;
	Morebits.status.errorEvent = null;
};

Morebits.status.root = null;

Morebits.status.onError = function(handler) {
	if ($.isFunction(handler)) {
		Morebits.status.errorEvent = handler;
	} else {
		throw 'Morebits.status.onError：处理程序不是一个函数';
	}
};

Morebits.status.prototype = {
	stat: null,
	text: null,
	textRaw: null,
	type: 'status',
	target: null,
	node: null,
	linked: false,
	link: function() {
		if (!this.linked && Morebits.status.root) {
			Morebits.status.root.appendChild(this.node);
			this.linked = true;
		}
	},
	unlink: function() {
		if (this.linked) {
			Morebits.status.root.removeChild(this.node);
			this.linked = false;
		}
	},
	codify: function(obj) {
		if (!$.isArray(obj)) {
			obj = [ obj ];
		}
		var result;
		result = document.createDocumentFragment();
		for (var i = 0; i < obj.length; ++i) {
			if (typeof obj[i] === 'string') {
				result.appendChild(document.createTextNode(obj[i]));
			} else if (obj[i] instanceof Element) {
				result.appendChild(obj[i]);
			} // Else cosmic radiation made something shit
		}
		return result;

	},
	update: function(status, type) {
		this.stat = this.codify(status);
		if (type) {
			this.type = type;
			if (type === 'error') {
				// hack to force the page not to reload when an error is output - see also Morebits.status() above
				Morebits.wiki.numberOfActionsLeft = 1000;

				// call error callback
				if (Morebits.status.errorEvent) {
					Morebits.status.errorEvent();
				}

				// also log error messages in the browser console
				console.error(this.textRaw + ': ' + status);
			}
		}
		this.render();
	},
	generate: function() {
		this.node = document.createElement('div');
		this.node.appendChild(document.createElement('span')).appendChild(this.text);
		this.node.appendChild(document.createElement('span')).appendChild(document.createTextNode(': '));
		this.target = this.node.appendChild(document.createElement('span'));
		this.target.appendChild(document.createTextNode('')); // dummy node
	},
	render: function() {
		this.node.className = 'tw_status_' + this.type;
		while (this.target.hasChildNodes()) {
			this.target.removeChild(this.target.firstChild);
		}
		this.target.appendChild(this.stat);
		this.link();
	},
	status: function(status) {
		this.update(status, 'status');
	},
	info: function(status) {
		this.update(status, 'info');
	},
	warn: function(status) {
		this.update(status, 'warn');
	},
	error: function(status) {
		this.update(status, 'error');
	}
};

Morebits.status.info = function(text, status) {
	return new Morebits.status(text, status, 'info');
};

Morebits.status.warn = function(text, status) {
	return new Morebits.status(text, status, 'warn');
};

Morebits.status.error = function(text, status) {
	return new Morebits.status(text, status, 'error');
};

// display the user's rationale, comments, etc. back to them after a failure,
// so they don't use it
Morebits.status.printUserText = function(comments, message) {
	var p = document.createElement('p');
	p.textContent = message;
	var div = document.createElement('div');
	div.className = 'toccolours';
	div.style.marginTop = '0';
	div.style.whiteSpace = 'pre-wrap';
	div.textContent = comments;
	p.appendChild(div);
	Morebits.status.root.appendChild(p);
};



/**
 * **************** Morebits.htmlNode() ****************
 * Simple helper function to create a simple node
 */

Morebits.htmlNode = function (type, content, color) {
	var node = document.createElement(type);
	if (color) {
		node.style.color = color;
	}
	node.appendChild(document.createTextNode(content));
	return node;
};



/**
 * **************** Morebits.checkboxClickHandler() ****************
 * shift-click-support for checkboxes
 * wikibits version (window.addCheckboxClickHandlers) has some restrictions, and
 * doesn't work with checkboxes inside a sortable table, so let's build our own.
 */

Morebits.checkboxShiftClickSupport = function (jQuerySelector, jQueryContext) {
	var lastCheckbox = null;

	function clickHandler(event) {
		var thisCb = this;
		if (event.shiftKey && lastCheckbox !== null) {
			var cbs = $(jQuerySelector, jQueryContext); // can't cache them, obviously, if we want to support resorting
			var index = -1, lastIndex = -1, i;
			for (i = 0; i < cbs.length; i++) {
				if (cbs[i] === thisCb) {
					index = i;
					if (lastIndex > -1) {
						break;
					}
				}
				if (cbs[i] === lastCheckbox) {
					lastIndex = i;
					if (index > -1) {
						break;
					}
				}
			}

			if (index > -1 && lastIndex > -1) {
				// inspired by wikibits
				var endState = thisCb.checked;
				var start, finish;
				if (index < lastIndex) {
					start = index + 1;
					finish = lastIndex;
				} else {
					start = lastIndex;
					finish = index - 1;
				}

				for (i = start; i <= finish; i++) {
					cbs[i].checked = endState;
				}
			}
		}
		lastCheckbox = thisCb;
		return true;
	}

	$(jQuerySelector, jQueryContext).click(clickHandler);
};



/** **************** Morebits.batchOperation ****************
 * Iterates over a group of pages and executes a worker function for each.
 *
 * Constructor: Morebits.batchOperation(currentAction)
 *
 * setPageList(wikitext): Sets the list of pages to work on.
 *    It should be an array of page names (strings).
 *
 * setOption(optionName, optionValue): Sets a known option:
 *    - chunkSize (integer): the size of chunks to break the array into (default 50).
 *                           Setting this to a small value (<5) can cause problems.
 *    - preserveIndividualStatusLines (boolean): keep each page's status element visible
 *                                               when worker is complete?  See note below
 *
 * run(worker): Runs the given callback for each page in the list.
 *    The callback must call workerSuccess when succeeding, or workerFailure
 *    when failing.  If using Morebits.wiki.api or Morebits.wiki.page, this is easily
 *    done by passing these two functions as parameters to the methods on those
 *    objects, for instance, page.save(batchOp.workerSuccess, batchOp.workerFailure).
 *    Make sure the methods are called directly if special success/failure cases arise.
 *    If you omit to call these methods, the batch operation will stall after the first
 *    chunk!  Also ensure that either workerSuccess or workerFailure is called no more
 *    than once.
 *
 * If using preserveIndividualStatusLines, you should try to ensure that the
 * workerSuccess callback has access to the page title.  This is no problem for
 * Morebits.wiki.page objects.  But when using the API, please set the
 * |pageName| property on the Morebits.wiki.api object.
 *
 * There are sample batchOperation implementations using Morebits.wiki.page in
 * twinklebatchdelete.js, and using Morebits.wiki.api in twinklebatchundelete.js.
 */

Morebits.batchOperation = function(currentAction) {
	var ctx = {
		// backing fields for public properties
		pageList: null,
		options: {
			chunkSize: 50,
			preserveIndividualStatusLines: false
		},

		// internal counters, etc.
		statusElement: new Morebits.status(currentAction || wgULS('执行批量操作', '執行批量操作')),
		worker: null,
		countStarted: 0,
		countFinished: 0,
		countFinishedSuccess: 0,
		currentChunkIndex: -1,
		pageChunks: [],
		running: false
	};

	// shouldn't be needed by external users, but provided anyway for maximum flexibility
	this.getStatusElement = function() {
		return ctx.statusElement;
	};

	this.setPageList = function(pageList) {
		ctx.pageList = pageList;
	};

	this.setOption = function(optionName, optionValue) {
		ctx.options[optionName] = optionValue;
	};

	this.run = function(worker) {
		if (ctx.running) {
			ctx.statusElement.error(wgULS('批量操作已在运行', '批量操作已在執行'));
			return;
		}
		ctx.running = true;

		ctx.worker = worker;
		ctx.countStarted = 0;
		ctx.countFinished = 0;
		ctx.countFinishedSuccess = 0;
		ctx.currentChunkIndex = -1;
		ctx.pageChunks = [];

		var total = ctx.pageList.length;
		if (!total) {
			ctx.statusElement.info(wgULS('没什么要做的', '沒什麼要做的'));
			ctx.running = false;
			return;
		}

		// chunk page list into more manageable units
		ctx.pageChunks = Morebits.array.chunk(ctx.pageList, ctx.options.chunkSize);

		// start the process
		Morebits.wiki.addCheckpoint();
		ctx.statusElement.status('0%');
		fnStartNewChunk();
	};

	this.workerSuccess = function(apiobj) {
		// update or remove status line
		if (apiobj && apiobj.getStatusElement) {
			var statelem = apiobj.getStatusElement();
			if (ctx.options.preserveIndividualStatusLines) {
				if (apiobj.getPageName || apiobj.pageName || (apiobj.query && apiobj.query.title)) {
					// we know the page title - display a relevant message
					var pageName = apiobj.getPageName ? apiobj.getPageName() :
						apiobj.pageName || apiobj.query.title;
					var link = document.createElement('a');
					link.setAttribute('href', mw.util.getUrl(pageName));
					link.appendChild(document.createTextNode(pageName));
					statelem.info(['完成（', link, '）']);
				} else {
					// we don't know the page title - just display a generic message
					statelem.info('完成');
				}
			} else {
				// remove the status line from display
				statelem.unlink();
			}
		}

		ctx.countFinishedSuccess++;
		fnDoneOne(apiobj);
	};

	this.workerFailure = function(apiobj) {
		fnDoneOne(apiobj);
	};

	// private functions

	var thisProxy = this;

	var fnStartNewChunk = function() {
		var chunk = ctx.pageChunks[++ctx.currentChunkIndex];
		if (!chunk) {
			return;  // done! yay
		}

		// start workers for the current chunk
		ctx.countStarted += chunk.length;
		chunk.forEach(function(page) {
			ctx.worker(page, thisProxy);
		});
	};

	var fnDoneOne = function() {
		ctx.countFinished++;

		// update overall status line
		var total = ctx.pageList.length;
		if (ctx.countFinished === total) {
			var statusString = '完成（' + ctx.countFinishedSuccess +
				'/' + ctx.countFinished + '操作成功完成）';
			if (ctx.countFinishedSuccess < ctx.countFinished) {
				ctx.statusElement.warn(statusString);
			} else {
				ctx.statusElement.info(statusString);
			}
			Morebits.wiki.removeCheckpoint();
			ctx.running = false;
			return;
		}

		// just for giggles! (well, serious debugging, actually)
		if (ctx.countFinished > total) {
			ctx.statusElement.warn(wgULS('完成（多执行了' + (ctx.countFinished - total) + '）', '完成（多執行了' + (ctx.countFinished - total) + '）'));
			Morebits.wiki.removeCheckpoint();
			ctx.running = false;
			return;
		}

		ctx.statusElement.status(parseInt(100 * ctx.countFinished / total, 10) + '%');

		// start a new chunk if we're close enough to the end of the previous chunk, and
		// we haven't already started the next one
		if (ctx.countFinished >= (ctx.countStarted - Math.max(ctx.options.chunkSize / 10, 2)) &&
			Math.floor(ctx.countFinished / ctx.options.chunkSize) > ctx.currentChunkIndex) {
			fnStartNewChunk();
		}
	};
};



/**
 * **************** Morebits.simpleWindow ****************
 * A simple draggable window
 * now a wrapper for jQuery UI's dialog feature
 */

// The height passed in here is the maximum allowable height for the content area.
Morebits.simpleWindow = function SimpleWindow(width, height) {
	var content = document.createElement('div');
	this.content = content;
	content.className = 'morebits-dialog-content';
	content.id = 'morebits-dialog-content-' + Math.round(Math.random() * 1e15);

	this.height = height;

	$(this.content).dialog({
		autoOpen: false,
		buttons: { '占位按钮': function() {} },
		dialogClass: 'morebits-dialog',
		width: Math.min(parseInt(window.innerWidth, 10), parseInt(width ? width : 800, 10)),
		// give jQuery the given height value (which represents the anticipated height of the dialog) here, so
		// it can position the dialog appropriately
		// the 20 pixels represents adjustment for the extra height of the jQuery dialog "chrome", compared
		// to that of the old SimpleWindow
		height: height + 20,
		close: function(event) {
			// dialogs and their content can be destroyed once closed
			$(event.target).dialog('destroy').remove();
		},
		resizeStart: function() {
			this.scrollbox = $(this).find('.morebits-scrollbox')[0];
			if (this.scrollbox) {
				this.scrollbox.style.maxHeight = 'none';
			}
		},
		resizeEnd: function() {
			this.scrollbox = null;
		},
		resize: function() {
			this.style.maxHeight = '';
			if (this.scrollbox) {
				this.scrollbox.style.width = '';
			}
		}
	});

	var $widget = $(this.content).dialog('widget');

	// add background gradient to titlebar
	var $titlebar = $widget.find('.ui-dialog-titlebar');
	var oldstyle = $titlebar.attr('style');
	$titlebar.attr('style', (oldstyle ? oldstyle : '') + '; background-image: url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAAkCAMAAAB%2FqqA%2BAAAAGXRFWHRTb2Z0d2FyZQBBZG9iZSBJbWFnZVJlYWR5ccllPAAAAEhQTFRFr73ZobTPusjdsMHZp7nVwtDhzNbnwM3fu8jdq7vUt8nbxtDkw9DhpbfSvMrfssPZqLvVztbno7bRrr7W1d%2Fs1N7qydXk0NjpkW7Q%2BgAAADVJREFUeNoMwgESQCAAAMGLkEIi%2FP%2BnbnbpdB59app5Vdg0sXAoMZCpGoFbK6ciuy6FX4ABAEyoAef0BXOXAAAAAElFTkSuQmCC) !important;');

	// delete the placeholder button (it's only there so the buttonpane gets created)
	$widget.find('button').each(function(key, value) {
		value.parentNode.removeChild(value);
	});

	// add container for the buttons we add, and the footer links (if any)
	var buttonspan = document.createElement('span');
	buttonspan.className = 'morebits-dialog-buttons';
	var linksspan = document.createElement('span');
	linksspan.className = 'morebits-dialog-footerlinks';
	$widget.find('.ui-dialog-buttonpane').append(buttonspan, linksspan);

	// resize the scrollbox with the dialog, if one is present
	$widget.resizable('option', 'alsoResize', '#' + this.content.id + ' .morebits-scrollbox, #' + this.content.id);
};

Morebits.simpleWindow.prototype = {
	buttons: [],
	height: 600,
	hasFooterLinks: false,
	scriptName: null,

	// Focuses the dialog. This might work, or on the contrary, it might not.
	focus: function() {
		$(this.content).dialog('moveToTop');

		return this;
	},
	// Closes the dialog.  If this is set as an event handler, it will stop the event from doing anything more.
	close: function(event) {
		if (event) {
			event.preventDefault();
		}
		$(this.content).dialog('close');

		return this;
	},
	// Shows the dialog.  Calling display() on a dialog that has previously been closed might work, but it is not guaranteed.
	display: function() {
		if (this.scriptName) {
			var $widget = $(this.content).dialog('widget');
			$widget.find('.morebits-dialog-scriptname').remove();
			var scriptnamespan = document.createElement('span');
			scriptnamespan.className = 'morebits-dialog-scriptname';
			scriptnamespan.textContent = this.scriptName + ' \u00B7 ';  // U+00B7 MIDDLE DOT = &middot;
			$widget.find('.ui-dialog-title').prepend(scriptnamespan);
		}

		var dialog = $(this.content).dialog('open');
		if (window.setupTooltips && window.pg && window.pg.re && window.pg.re.diff) {  // tie in with NAVPOP
			dialog.parent()[0].ranSetupTooltipsAlready = false;
			window.setupTooltips(dialog.parent()[0]);
		}
		this.setHeight(this.height);  // init height algorithm

		return this;
	},
	// Sets the dialog title.
	setTitle: function(title) {
		$(this.content).dialog('option', 'title', title);

		return this;
	},
	// Sets the script name, appearing as a prefix to the title to help users determine which
	// user script is producing which dialog. For instance, Twinkle modules set this to "Twinkle".
	setScriptName: function(name) {
		this.scriptName = name;

		return this;
	},
	// Sets the dialog width.
	setWidth: function(width) {
		$(this.content).dialog('option', 'width', width);

		return this;
	},
	// Sets the dialog's maximum height. The dialog will auto-size to fit its contents,
	// but the content area will grow no larger than the height given here.
	setHeight: function(height) {
		this.height = height;

		// from display time onwards, let the browser determine the optimum height, and instead limit the height at the given value
		// note that the given height will exclude the approx. 20px that the jQuery UI chrome has in height in addition to the height
		// of an equivalent "classic" Morebits.simpleWindow
		if (parseInt(getComputedStyle($(this.content).dialog('widget')[0], null).height, 10) > window.innerHeight) {
			$(this.content).dialog('option', 'height', window.innerHeight - 2).dialog('option', 'position', 'top');
		} else {
			$(this.content).dialog('option', 'height', 'auto');
		}
		$(this.content).dialog('widget').find('.morebits-dialog-content')[0].style.maxHeight = parseInt(this.height - 30, 10) + 'px';

		return this;
	},
	// Sets the content of the dialog to the given element node, usually from rendering a Morebits.quickForm.
	// Re-enumerates the footer buttons, but leaves the footer links as they are.
	// Be sure to call this at least once before the dialog is displayed...
	setContent: function(content) {
		this.purgeContent();
		this.addContent(content);

		return this;
	},
	addContent: function(content) {
		this.content.appendChild(content);

		// look for submit buttons in the content, hide them, and add a proxy button to the button pane
		var thisproxy = this;
		$(this.content).find('input[type="submit"], button[type="submit"]').each(function(key, value) {
			value.style.display = 'none';
			var button = document.createElement('button');
			button.textContent = value.hasAttribute('value') ? value.getAttribute('value') : value.textContent ? value.textContent : '提交';
			// here is an instance of cheap coding, probably a memory-usage hit in using a closure here
			button.addEventListener('click', function() {
				value.click();
			}, false);
			thisproxy.buttons.push(button);
		});
		// remove all buttons from the button pane and re-add them
		if (this.buttons.length > 0) {
			$(this.content).dialog('widget').find('.morebits-dialog-buttons').empty().append(this.buttons)[0].removeAttribute('data-empty');
		} else {
			$(this.content).dialog('widget').find('.morebits-dialog-buttons')[0].setAttribute('data-empty', 'data-empty');  // used by CSS
		}

		return this;
	},
	purgeContent: function() {
		this.buttons = [];
		// delete all buttons in the buttonpane
		$(this.content).dialog('widget').find('.morebits-dialog-buttons').empty();

		while (this.content.hasChildNodes()) {
			this.content.removeChild(this.content.firstChild);
		}

		return this;
	},
	// Adds a link in the bottom-right corner of the dialog.
	// This can be used to provide help or policy links.
	// For example, Twinkle's CSD module adds a link to the CSD policy page,
	// as well as a link to Twinkle's documentation.
	addFooterLink: function(text, wikiPage) {
		var $footerlinks = $(this.content).dialog('widget').find('.morebits-dialog-footerlinks');
		if (this.hasFooterLinks) {
			var bullet = document.createElement('span');
			bullet.textContent = ' \u2022 ';  // U+2022 BULLET
			$footerlinks.append(bullet);
		}
		var link = document.createElement('a');
		link.setAttribute('href', mw.util.getUrl(wikiPage));
		link.setAttribute('title', wikiPage);
		link.setAttribute('target', '_blank');
		link.textContent = text;
		$footerlinks.append(link);
		this.hasFooterLinks = true;

		return this;
	},
	setModality: function(modal) {
		$(this.content).dialog('option', 'modal', modal);

		return this;
	}
};

// Enables or disables all footer buttons on all Morebits.simpleWindows in the current page.
// This should be called with |false| when the button(s) become irrelevant (e.g. just before Morebits.status.init is called).
// This is not an instance method so that consumers don't have to keep a reference to the original
// Morebits.simpleWindow object sitting around somewhere. Anyway, most of the time there will only be one
// Morebits.simpleWindow open, so this shouldn't matter.
Morebits.simpleWindow.setButtonsEnabled = function(enabled) {
	$('.morebits-dialog-buttons button').prop('disabled', !enabled);
};


// Twinkle blacklist was removed per consensus at http://en.wikipedia.org/wiki/Wikipedia:Administrators%27_noticeboard/Archive221#New_Twinkle_blacklist_proposal



}(window, document, jQuery)); // End wrap with anonymous function


/**
 * If this script is being executed outside a ResourceLoader context, we add some
 * global assignments for legacy scripts, hopefully these can be removed down the line
 *
 * IMPORTANT NOTE:
 * PLEASE DO NOT USE THESE ALIASES IN NEW CODE!
 * Thanks.
 */

if (typeof arguments === 'undefined') {  // typeof is here for a reason...
	/* global Morebits */
	window.SimpleWindow = Morebits.simpleWindow;
	window.QuickForm = Morebits.quickForm;
	window.Wikipedia = Morebits.wiki;
	window.Status = Morebits.status;
	window.QueryString = Morebits.queryString;
}

// </nowiki>