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GM_config_zh-CN

A lightweight, reusable, cross-browser graphical settings framework for inclusion in user scripts.

Dieses Skript sollte nicht direkt installiert werden. Es handelt sich hier um eine Bibliothek für andere Skripte, welche über folgenden Befehl in den Metadaten eines Skriptes eingebunden wird // @require https://update.greasyfork.org/scripts/398240/832590/GM_config_zh-CN.js

// ==UserScript==
// @name          GM_config_zh-CN
// @author        Mike Medley & zxf10608
// @version       1.3.7
// @description   GM_config_中文版
// @grant         GM_getValue
// @grant         GM_setValue
// @grant         GM_deleteValue
// @exclude       *
// @license       LGPL 3
// ==/UserScript==

/*
优化说明
    1、改成中文 "确定"、"取消" 按钮。
    2、select 新增了 textContents 数组。
	3、新增了skin: 'tab'换页切换菜单样式
	4、更新部分翻译
	5、优化字体显示效果
	6、优化同一行内CSS样式
*/


// The GM_config constructor
function GM_configStruct() {
  // call init() if settings were passed to constructor
  if (arguments.length) {
    GM_configInit(this, arguments);
    this.onInit();
  }
}

// This is the initializer function
function GM_configInit(config, args) {
    // Initialize instance variables
    if (typeof config.fields == "undefined") {
        config.fields = {};
        config.onInit = config.onInit || function() {};
        config.onOpen = config.onOpen || function() {};
        config.onSave = config.onSave || function() {};
        config.onClose = config.onClose || function() {};
        config.onReset = config.onReset || function() {};
        config.isOpen = false;
        config.title = '用户脚本设置';
        config.css = {
            basic: [
                "#GM_config * { font-family: arial,tahoma,myriad pro,sans-serif; }",
                "#GM_config { background: #FFF; }",
                "#GM_config input[type='radio'] { margin-right: 8px; }",
                "#GM_config .indent40 { margin-left: 40%; }",
                "#GM_config .field_label { font-size: 14px; font-weight: bold; margin-right: 6px; }",
                "#GM_config .radio_label { font-size: 14px; }",
                "#GM_config .block { display: block; }",
                "#GM_config .saveclose_buttons { margin: 16px 10px 10px; padding: 2px 12px; }",
                "#GM_config .reset, #GM_config .reset a," +
                  " #GM_config_buttons_holder { color: #000; text-align: right; }",
                "#GM_config .config_header { font-size: 20pt; margin: 0; }",
                "#GM_config .config_desc, #GM_config .section_desc, #GM_config .reset { font-size: 9pt; }",
                "#GM_config .center { text-align: center; }",
                "#GM_config .section_header_holder { margin-top: 8px; }",
                "#GM_config .config_var { margin: 0 0 4px; }",
                "#GM_config .section_header { background: #414141; border: 1px solid #000; color: #FFF;" +
                  " font-size: 12pt; margin: 0; }",
                "#GM_config .section_desc { background: #EFEFEF; border: 1px solid #CCC; color: #575757;" +
                  " font-size: 10pt; margin: 0 0 6px; }",
                // newer
                "#GM_config input[type='number'] { width: 60px; }",
                "#GM_config .nav-tabs { margin: 10 0}",
                "#GM_config .nav-tabs > div { display: inline; padding: 3px 10px; }",
                "#pv-prefs .section_header_holder { padding-left: 10px; }",
                ].join('\n') + '\n',
            skin_tab: [
                "#GM_config { background: #EEE; }",
                "#GM_config textarea { width: 98%; height: 45px; margin-top: 5px; }",
                "#GM_config .field_label { display: inline-block; font-weight: normal; }",
                // 在同一行内的设置
                "#GM_config .inline input[type='checkbox'] {margin: 3px 3px 3px 0px;}",
                "#GM_config .inline .config_var { margin-left: 15px; }",
                // 内容样式
                "#GM_config .config_var { font-size: 14px; padding: 5px; margin: 0; }",
                "#GM_config .config_header a { text-decoration: none; color: #000; }",
                "#GM_config .nav-tabs { margin: 20 0}",
                "#GM_config .nav-tabs > div { font-size: 15px; color: #999; cursor: pointer; padding: 10px 20px; }",
                "#GM_config .nav-tabs > .active { cursor: default; color: #FFF; }",
                "#GM_config .nav-tabs > div:hover { color: #FFF; }",
                ].join('\n') + '\n',
            skin_1: [  // 仿 Mouseover Popup Image Viewer 样式
                "#GM_config { background: #EEE; }",
                "#GM_config textarea { width: 98%; height: 45px; margin-top: 5px; }",
                "#GM_config .config_var { font-size: 12px; }",
                "#GM_config .inline .config_var { margin-left: 15px; }",
                "#GM_config .field_label { display: inline-block; font-weight: normal; }",
                "#GM_config { padding: 20px 30px; margin: 0; }",
                "#GM_config .config_header { margin-bottom: 10px; }",
                "#GM_config div.config_var { padding: 7px 0; }",
                ].join('\n') + '\n',
            basicPrefix: "GM_config",
            stylish: ""
        };
    }

  if (args.length == 1 &&
    typeof args[0].id == "string" &&
    typeof args[0].appendChild != "function") var settings = args[0];
  else {
    // Provide backwards-compatibility with argument style intialization
    var settings = {};

    // loop through GM_config.init() arguments
    for (var i = 0, l = args.length, arg; i < l; ++i) {
      arg = args[i];

      // An element to use as the config window
      if (typeof arg.appendChild == "function") {
        settings.frame = arg;
        continue;
      }

            switch (typeof arg) {
                case 'object':
                    for (var j in arg) { // could be a callback functions or settings object
                        if (typeof arg[j] != "function") { // we are in the settings object
                            if (typeof arg[j] == 'string') {
                                settings.frameStyle = arg;
                            } else {
                                settings.fields = arg; // store settings object
                            }
                            break; // leave the loop
                        } // otherwise it must be a callback function
                        if (!settings.events) settings.events = {};
                        settings.events[j] = arg[j];
                    }
                    break;
                case 'function': // passing a bare function is set to open callback
                    settings.events = {open: arg};
                    break;
                case 'string': // could be custom CSS or the title string
                    // if (/[\w\.]+\s*\{\s*[\w-]+\s*:\s*\w+[\s|\S]*\}/.test(arg))
                    if (/[\w\.]+\s*\{\s*[\w-]+\s*:[\s|\S]*\}/.test(arg))
                        settings.css = arg;
                    else if (arg)
                        settings.title = arg;
                    break;
            }
        }
    }

  /* Initialize everything using the new settings object */
  // Set the id
  if (settings.id) config.id = settings.id;
  else if (typeof config.id == "undefined") config.id = 'GM_config';

  // Set the title
  if (settings.title) config.title = settings.title;

  // Set the custom css
  if (settings.css) config.css.stylish = settings.css;

    if (settings.skin) {
        var skin = config.css['skin_' + settings.skin];
        if (skin) {
            config.css.basic += skin;
        }
    }

    // Set the frame
    if (settings.frame) config.frame = settings.frame;
    if (settings.frameStyle) config.frameStyle = settings.frameStyle;

    config.isTabs = settings.isTabs;

  // Set the event callbacks
  if (settings.events) {
    var events = settings.events;
    for (var e in events)
      config["on" + e.charAt(0).toUpperCase() + e.slice(1)] = events[e];
  }

    // Create the fields
    if (settings.fields) {
        var stored = config.read(), // read the stored settings
                fields = settings.fields,
                customTypes = settings.types || {};

    for (var id in fields) {
      var field = fields[id];

            // for each field definition create a field object
            if (field)
                config.fields[id] = new GM_configField(field, stored[id], id,
                    customTypes[field.type]);
            else if (config.fields[id]) delete config.fields[id];
        }
    }

  // If the id has changed we must modify the default style
  if (config.id != config.css.basicPrefix) {
    config.css.basic = config.css.basic.replace(
      new RegExp('#' + config.css.basicPrefix, 'gm'), '#' + config.id);
    config.css.basicPrefix = config.id;
  }
}

GM_configStruct.prototype = {
  // Support old method of initalizing
  init: function() {
    GM_configInit(this, arguments);
    this.onInit();
  },

  // call GM_config.open() from your script to open the menu
  open: function () {
    // Die if the menu is already open on this page
    // You can have multiple instances but you can't open the same instance twice
    var match = document.getElementById(this.id);
    if (match && (match.tagName == "IFRAME" || match.childNodes.length > 0)) return;

    // Sometimes "this" gets overwritten so create an alias
    var config = this;

    // Function to build the mighty config window :)
    function buildConfigWin (body, head) {
      var create = config.create,
          fields = config.fields,
          configId = config.id,
          bodyWrapper = create('div', {id: configId + '_wrapper'});

      // Append the style which is our default style plus the user style
      head.appendChild(
        create('style', {
        type: 'text/css',
        textContent: config.css.basic + config.css.stylish
      }));

      // Add header and title
      bodyWrapper.appendChild(create('div', {
        id: configId + '_header',
        className: 'config_header block center'
      }, config.title));

            // Append elements
            var section = bodyWrapper,
                    secNum = 0; // Section count
            var lastParentNode = null;

      // loop through fields
      for (var id in fields) {
        var field = fields[id],
            settings = field.settings;

        if (settings.section) { // the start of a new section
          section = bodyWrapper.appendChild(create('div', {
              className: 'section_header_holder',
              id: configId + '_section_' + secNum
            }));

          if (Object.prototype.toString.call(settings.section) !== '[object Array]')
            settings.section = [settings.section];

          if (settings.section[0])
            section.appendChild(create('div', {
              className: 'section_header center',
              id: configId + '_section_header_' + secNum
            }, settings.section[0]));

          if (settings.section[1])
            section.appendChild(create('p', {
              className: 'section_desc center',
              id: configId + '_section_desc_' + secNum
            }, settings.section[1]));
          ++secNum;
        }

                if (settings.line == 'start' && lastParentNode) {  // 切换到下一行
                    lastParentNode = null;
                }

                // Create field elements and append to current section
                (lastParentNode || section).appendChild((field.wrapper = field.toNode(configId, lastParentNode)));

                if (settings.line == 'start') {
                    lastParentNode = field.wrapper;
                    lastParentNode.classList.add('inline')
                } else if (settings.line == 'end') {
                    lastParentNode = null;
                }
            }

      // Add save and close buttons
      bodyWrapper.appendChild(create('div',
        {id: configId + '_buttons_holder'},

                create('button', {
                    id: configId + '_saveBtn',
                    textContent: '确定',
                    title: '部分选项需要刷新页面才能生效',
                    className: 'saveclose_buttons',
                    onclick: function () {
                        config.save();
                        config.close();
                    }
                }),

                create('button', {
                    id: configId + '_closeBtn',
                    textContent: '取消',
                    title: '取消本次设置,所有选项还原',
                    className: 'saveclose_buttons',
                    onclick: function () {
                        config.close()
                    }
                }),

        create('div',
          {className: 'reset_holder block'},

                    // Reset link
                    create('a', {
                        id: configId + '_resetLink',
                        textContent: '恢复默认设置',
                        href: '#',
                        title: '恢复所有设置的内容为默认值',
                        className: 'reset',
                        onclick: function (e) {
                            e.preventDefault();
                            config.reset()
                        }
                    })
            )));

      body.appendChild(bodyWrapper); // Paint everything to window at once
      config.center(); // Show and center iframe
      window.addEventListener('resize', config.center, false); // Center frame on resize

            // Call the open() callback function
            config.onOpen(config.frame.contentDocument || config.frame.ownerDocument,
                                        config.frame.contentWindow || window,
                                        config.frame);

            if (config.isTabs) {
                config.toTabs();
            }

      // Close frame on window close
      window.addEventListener('beforeunload', function () {
          config.close();
      }, false);

      // Now that everything is loaded, make it visible
      config.frame.style.display = "block";
      config.isOpen = true;
    }

        // Change this in the onOpen callback using this.frame.setAttribute('style', '')
        var defaultStyle = 'bottom: auto; border: 1px solid #000; display: none; height: 75%;'
			+ ' left: 0; margin: 0; max-height: 95%; max-width: 95%; opacity: 0;'
			+ ' overflow: auto; padding: 0; position: fixed; right: auto; top: 0;'
			+ ' width: 75%; z-index: 999999999;';

        // Either use the element passed to init() or create an iframe
        if (this.frame) {
            this.frame.id = this.id; // Allows for prefixing styles with the config id
            this.frame.setAttribute('style', defaultStyle);
            buildConfigWin(this.frame, this.frame.ownerDocument.getElementsByTagName('head')[0]);
        } else {
            // Create frame
            document.body.appendChild((this.frame = this.create('iframe', {
                id: this.id,
                style: defaultStyle
            })));

            if (this.frameStyle) {
                Object.keys(this.frameStyle).forEach(function(key) {
                    config.frame.style[key] = config.frameStyle[key];
                })
            }

      // In WebKit src can't be set until it is added to the page
      this.frame.src = 'about:blank';
      // we wait for the iframe to load before we can modify it
      this.frame.addEventListener('load', function(e) {
          var frame = config.frame;
          var body = frame.contentDocument.getElementsByTagName('body')[0];
          body.id = config.id; // Allows for prefixing styles with the config id
          buildConfigWin(body, frame.contentDocument.getElementsByTagName('head')[0]);
      }, false);
    }
  },

  save: function () {
    var forgotten = this.write();
    this.onSave(forgotten); // Call the save() callback function
  },

    close: function() {
        if (!this.frame) return;
        // If frame is an iframe then remove it
        if (this.frame.contentDocument) {
            this.remove(this.frame);
            this.frame = null;
        } else { // else wipe its content
            this.frame.innerHTML = "";
            this.frame.style.display = "none";
        }

    // Null out all the fields so we don't leak memory
    var fields = this.fields;
    for (var id in fields) {
      var field = fields[id];
      field.wrapper = null;
      field.node = null;
    }

    this.onClose(); //  Call the close() callback function
    this.isOpen = false;
  },

  set: function (name, val) {
    this.fields[name].value = val;

    if (this.fields[name].node) {
      this.fields[name].reload();
    }
  },

  get: function (name, getLive) {
    var field = this.fields[name],
        fieldVal = null;

    if (getLive && field.node) {
      fieldVal = field.toValue();
    }

    return fieldVal != null ? fieldVal : field.value;
  },

  write: function (store, obj) {
    if (!obj) {
      var values = {},
          forgotten = {},
          fields = this.fields;

      for (var id in fields) {
        var field = fields[id];
        var value = field.toValue();

        if (field.save) {
          if (value != null) {
            values[id] = value;
            field.value = value;
          } else
            values[id] = field.value;
        } else
          forgotten[id] = value;
      }
    }
    try {
      this.setValue(store || this.id, this.stringify(obj || values));
    } catch(e) {
      this.log("GM_config failed to save settings!");
    }

    return forgotten;
  },

  read: function (store) {
    try {
      var rval = this.parser(this.getValue(store || this.id, '{}'));
    } catch(e) {
      this.log("GM_config failed to read saved settings!");
      var rval = {};
    }
    return rval;
  },

  reset: function () {
    var fields = this.fields;

    // Reset all the fields
    for (var id in fields) fields[id].reset();

    this.onReset(); // Call the reset() callback function
  },

    create: function () {
        switch(arguments.length) {
            case 1:
                var A = document.createTextNode(arguments[0]);
                break;
            default:
                var A = document.createElement(arguments[0]),
                        B = arguments[1];
                for (var b in B) {
                    if (b.indexOf("on") == 0)
                        A.addEventListener(b.substring(2), B[b], false);
                    else if (",style,accesskey,id,name,src,href,which,for".indexOf("," +
                                     b.toLowerCase()) != -1)
                        A.setAttribute(b, B[b]);
                    else if (typeof B[b] != 'undefined')
                        A[b] = B[b];
                }
                if (typeof arguments[2] == "string")
                    A.innerHTML = arguments[2];
                else
                    for (var i = 2, len = arguments.length; i < len; ++i)
                        A.appendChild(arguments[i]);
        }
        return A;
    },

  center: function () {
    var node = this.frame;
    if (!node) return;
    var style = node.style,
        beforeOpacity = style.opacity;
    if (style.display == 'none') style.opacity = '0';
    style.display = '';
    style.top = Math.floor((window.innerHeight / 2) - (node.offsetHeight / 2)) + 'px';
    style.left = Math.floor((window.innerWidth / 2) - (node.offsetWidth / 2)) + 'px';
    style.opacity = '1';
  },

    remove: function (el) {
        if (el && el.parentNode) el.parentNode.removeChild(el);
    },

    toTabs: function() {  // 转为 tab 的形式
        var body = this.frame.tagName == 'IFRAME' ? this.frame.contentWindow.document : this.frame,
            configId = this.id;
        var $ = function(id) {
            return body.getElementById(configId + '_' + id);
        };

        var headers = body.querySelectorAll('.section_header');
        if (!headers.length) return;

        var anch = this.create('div', {
            // id: configId + '_tab_holder',
            className: 'nav-tabs',
        });

        for (var i = 0, header; i < headers.length; i++) {
            header = headers[i];
            if (i == 0) {
                header.classList.add('active');
            }
            anch.appendChild(header);
        }

        anch.addEventListener('click', this.toggleTab.bind(this), false);

        $('section_0').parentNode.insertBefore(anch, $('section_0'));

        var curTab = localStorage.getItem('picviewerCE.config.curTab') || 0;
        this.toggleTab(parseInt(curTab, 10));
    },
    toggleTab: function(e) {
        var body = this.frame.tagName == 'IFRAME' ? this.frame.contentWindow.document : this.frame,
            configId = this.id;

        var curTab = typeof e == 'number' ? e : /\_(\d+)/.exec(e.target.id)[1];

        [].forEach.call(body.querySelectorAll('.section_header'), function(header, i) {
            if (i == curTab) {
                header.classList.add('active');
            } else {
                header.classList.remove('active');
            }
        });

        [].forEach.call(body.querySelectorAll('.section_header_holder'), function(holder, i) {
            holder.style.display = (i == curTab) ? 'block' : 'none';
        });

        localStorage.setItem('picviewerCE.config.curTab', curTab)
    }
};

// Define a bunch of API stuff
(function() {
  var isGM = typeof GM_getValue != 'undefined' &&
             typeof GM_getValue('a', 'b') != 'undefined',
      setValue, getValue, stringify, parser;

  // Define value storing and reading API
  if (!isGM) {
    setValue = function (name, value) {
      return localStorage.setItem(name, value);
    };
    getValue = function(name, def){
      var s = localStorage.getItem(name);
      return s == null ? def : s
    };

    // We only support JSON parser outside GM
    stringify = JSON.stringify;
    parser = JSON.parse;
  } else {
    setValue = GM_setValue;
    getValue = GM_getValue;
    stringify = typeof JSON == "undefined" ?
      function(obj) {
        return obj.toSource();
    } : JSON.stringify;
    parser = typeof JSON == "undefined" ?
      function(jsonData) {
        return (new Function('return ' + jsonData + ';'))();
    } : JSON.parse;
  }

  GM_configStruct.prototype.isGM = isGM;
  GM_configStruct.prototype.setValue = setValue;
  GM_configStruct.prototype.getValue = getValue;
  GM_configStruct.prototype.stringify = stringify;
  GM_configStruct.prototype.parser = parser;
  GM_configStruct.prototype.log =  window.console ?
    console.log : (isGM && typeof GM_log != 'undefined' ?
      GM_log : (window.opera ?
        opera.postError : function(){ /* no logging */ }
  ));
})();

function GM_configDefaultValue(type, options) {
  var value;

    if (type && type.indexOf('unsigned ') == 0)
        type = type.substring(9);

  switch (type) {
    case 'radio': case 'select':
      value = options[0];
      break;
    case 'checkbox':
      value = false;
      break;
    case 'int': case 'integer':
    case 'float': case 'number':
      value = 0;
      break;
    default:
      value = '';
  }

  return value;
}

function GM_configField(settings, stored, id, customType) {
    // Store the field's settings
    this.settings = settings;
    this.id = id;
    this.node = null;
    this.wrapper = null;
    this.save = typeof settings.save == "undefined" ? true : settings.save;

    // Buttons are static and don't have a stored value
    if (settings.type == "button") this.save = false;
    if (settings.type == "span") this.save = false;

  // if a default value wasn't passed through init() then
  //   if the type is custom use its default value
  //   else use default value for type
  // else use the default value passed through init()
  this['default'] = typeof settings['default'] == "undefined" ?
    customType ?
      customType['default']
      : GM_configDefaultValue(settings.type, settings.options)
    : settings['default'];

  // Store the field's value
  this.value = typeof stored == "undefined" ? this['default'] : stored;

  // Setup methods for a custom type
  if (customType) {
    this.toNode = customType.toNode;
    this.toValue = customType.toValue;
    this.reset = customType.reset;
  }
}

GM_configField.prototype = {
  create: GM_configStruct.prototype.create,

    toNode: function(configId, lastParentNode) {
        var field = this.settings,
                value = this.value,
                options = field.options,
                type = field.type,
                id = this.id,
                labelPos = field.labelPos,
                create = this.create;

        function addLabel(pos, labelEl, parentNode, beforeEl) {
            if (!beforeEl) {
                beforeEl = lastParentNode ? parentNode.lastChild : parentNode.firstChild;  // oneLine 的修正
            }

            switch (pos) {
                case 'right': case 'below':
                    if (pos == 'below')
                        parentNode.appendChild(create('br', {}));
                    parentNode.appendChild(labelEl);
                    break;
                default:
                    if (pos == 'above')
                        parentNode.insertBefore(create('br', {}), beforeEl);
                    parentNode.insertBefore(labelEl, beforeEl);
            }
        }

    var retNode = create('div', { className: 'config_var',
          id: configId + '_' + id + '_var',
          title: field.title || '' }),
        firstProp;

    // Retrieve the first prop
    for (var i in field) { firstProp = i; break; }

    var label = field.label && type != "button" ?
      create('label', {
        id: configId + '_' + id + '_field_label',
        for: configId + '_field_' + id,
        className: 'field_label'
      }, field.label) : null;

        switch (type) {
            case 'span':
                label = null;

                this.node = create('span', {
                    innerHTML: field.label,
                    className: 'field_label',
                    title: field.title,
                    style: field.style
                });
                retNode = this.node;
                break;
            case 'textarea':
                retNode.appendChild((this.node = create('textarea', {
                    innerHTML: value,
                    id: configId + '_field_' + id,
                    className: 'block' + (field.className ? (" " + field.className) : ''),
                    cols: (field.cols ? field.cols : 20),
                    rows: (field.rows ? field.rows : 2),
                    placeholder: field.placeholder
                })));
                break;
            case 'radio':
                var wrap = create('div', {
                    id: configId + '_field_' + id,
                    className: field.className
                });
                this.node = wrap;

        for (var i = 0, len = options.length; i < len; ++i) {
          var radLabel = create('label', {
            className: 'radio_label'
          }, options[i]);

          var rad = wrap.appendChild(create('input', {
            value: options[i],
            type: 'radio',
            name: id,
            checked: options[i] == value
          }));

          var radLabelPos = labelPos &&
            (labelPos == 'left' || labelPos == 'right') ?
            labelPos : firstProp == 'options' ? 'left' : 'right';

          addLabel(radLabelPos, radLabel, wrap, rad);
        }

        retNode.appendChild(wrap);
        break;
      case 'select':
        var wrap = create('select', {
          id: configId + '_field_' + id
        });
        this.node = wrap;

        for (var i = 0, len = options.length; i < len; ++i) {
          var option = options[i];
          wrap.appendChild(create('option', {
            value: option,
            selected: option == value
          }, option));
        }

        retNode.appendChild(wrap);
        break;
      default: // fields using input elements
        var props = {
          id: configId + '_field_' + id,
          type: type,
          value: type == 'button' ? field.label : value
        };

        switch (type) {
          case 'checkbox':
            props.checked = value;
            break;
          case 'button':
            props.size = field.size ? field.size : 25;
            if (field.script) field.click = field.script;
            if (field.click) props.onclick = field.click;
            break;
          case 'hidden':
            break;
          default:
            // type = text, int, or float
            props.type = 'text';
            props.size = field.size ? field.size : 25;
        }

        retNode.appendChild((this.node = create('input', props)));
    }

    if (label) {
      // If the label is passed first, insert it before the field
      // else insert it after
      if (!labelPos)
        labelPos = firstProp == "label" || type == "radio" ?
          "left" : "right";

      addLabel(labelPos, label, retNode);
    }

    return retNode;
  },

  toValue: function() {
    var node = this.node,
        field = this.settings,
        type = field.type,
        unsigned = false,
        rval = null;

    if (!node) return rval;

    if (type.indexOf('unsigned ') == 0) {
      type = type.substring(9);
      unsigned = true;
    }

    switch (type) {
      case 'checkbox':
        rval = node.checked;
        break;
      case 'select':
        rval = node[node.selectedIndex].value;
        break;
      case 'radio':
        var radios = node.getElementsByTagName('input');
        for (var i = 0, len = radios.length; i < len; ++i)
          if (radios[i].checked)
            rval = radios[i].value;
        break;
      case 'button':
        break;
      case 'int': case 'integer':
      case 'float': case 'number':
        var num = Number(node.value);
        var warn = '输入字符 "' + field.label + '" 要求必须为' +
          (unsigned ? ' 正 ' : 'n ') + '整数值';

        if (isNaN(num) || (type.substr(0, 3) == 'int' &&
            Math.ceil(num) != Math.floor(num)) ||
            (unsigned && num < 0)) {
          alert(warn + '.');
          return null;
        }

        if (!this._checkNumberRange(num, warn))
          return null;
        rval = num;
        break;
      default:
        rval = node.value;
        break;
    }

    return rval; // value read successfully
  },

  reset: function() {
    var node = this.node,
        field = this.settings,
        type = field.type;

    if (!node) return;

        switch (type) {
            case 'checkbox':
                node.checked = this['default'];
                break;
            case 'select':
                for (var i = 0, len = node.options.length; i < len; ++i)
                if (node.options[i].value == this['default'])
                        node.selectedIndex = i;
                break;
            case 'radio':
                var radios = node.getElementsByTagName('input');
                for (var i = 0, len = radios.length; i < len; ++i)
                    if (radios[i].value == this['default'])
                        radios[i].checked = true;
                break;
            case 'button' :
                break;
            default:
                node.value = this['default'];
                break;
            }
    },

  remove: function(el) {
    GM_configStruct.prototype.remove(el || this.wrapper);
    this.wrapper = null;
    this.node = null;
  },

  reload: function() {
    var wrapper = this.wrapper;
    if (wrapper) {
      var fieldParent = wrapper.parentNode;
      fieldParent.insertBefore((this.wrapper = this.toNode()), wrapper);
      this.remove(wrapper);
    }
  },

  _checkNumberRange: function(num, warn) {
    var field = this.settings;
    if (typeof field.min == "number" && num < field.min) {
      alert(warn + ' greater than or equal to ' + field.min + '.');
      return null;
    }

    if (typeof field.max == "number" && num > field.max) {
      alert(warn + ' less than or equal to ' + field.max + '.');
      return null;
    }
    return true;
  }
};

// Create default instance of GM_config
var GM_config = new GM_configStruct();