更新： 自己找到解决方案，看到答案
答案 0 :(得分：3)
我自己找到了解决方案，希望它会帮助别人。
我必须做到如下：
在扩展目录中，我创建了一个名为“components”的新目录。
在那个目录里面，我使用自定义自动完成名称创建了一个js文件，在本例中为“simpleautocomplete.js”。该js文件的内容是：
/*
* https://developer.mozilla.org/en/How_to_implement_custom_autocomplete_search_component
*/
const Ci = Components.interfaces;
const CLASS_ID = Components.ID("6224daa1-71a2-4d1a-ad90-01ca1c08e323");
const CLASS_NAME = "Simple AutoComplete";
const CONTRACT_ID = "@mozilla.org/autocomplete/search;1?name=simple-autocomplete";
try{
Components.utils.import("resource://gre/modules/XPCOMUtils.jsm");
} catch (x) {
}
// Implements nsIAutoCompleteResult
function SimpleAutoCompleteResult(searchString, searchResult,
defaultIndex, errorDescription,
results, comments) {
this._searchString = searchString;
this._searchResult = searchResult;
this._defaultIndex = defaultIndex;
this._errorDescription = errorDescription;
this._results = results;
this._comments = comments;
}
SimpleAutoCompleteResult.prototype = {
_searchString: "",
_searchResult: 0,
_defaultIndex: 0,
_errorDescription: "",
_results: [],
_comments: [],
getLabelAt: function(index) { return this._results[index]; },
/**
* The original search string
*/
get searchString() {
return this._searchString;
},
/**
* The result code of this result object, either:
* RESULT_IGNORED (invalid searchString)
* RESULT_FAILURE (failure)
* RESULT_NOMATCH (no matches found)
* RESULT_SUCCESS (matches found)
*/
get searchResult() {
return this._searchResult;
},
/**
* Index of the default item that should be entered if none is selected
*/
get defaultIndex() {
return this._defaultIndex;
},
/**
* A string describing the cause of a search failure
*/
get errorDescription() {
return this._errorDescription;
},
/**
* The number of matches
*/
get matchCount() {
return this._results.length;
},
/**
* Get the value of the result at the given index
*/
getValueAt: function(index) {
return this._results[index];
},
/**
* Get the comment of the result at the given index
*/
getCommentAt: function(index) {
return this._comments[index];
},
/**
* Get the style hint for the result at the given index
*/
getStyleAt: function(index) {
if (!this._comments[index])
return null; // not a category label, so no special styling
if (index == 0)
return "suggestfirst"; // category label on first line of results
return "suggesthint"; // category label on any other line of results
},
/**
* Get the image for the result at the given index
* The return value is expected to be an URI to the image to display
*/
getImageAt : function (index) {
return "";
},
/**
* Remove the value at the given index from the autocomplete results.
* If removeFromDb is set to true, the value should be removed from
* persistent storage as well.
*/
removeValueAt: function(index, removeFromDb) {
this._results.splice(index, 1);
this._comments.splice(index, 1);
},
QueryInterface: function(aIID) {
if (!aIID.equals(Ci.nsIAutoCompleteResult) && !aIID.equals(Ci.nsISupports))
throw Components.results.NS_ERROR_NO_INTERFACE;
return this;
}
};
// Implements nsIAutoCompleteSearch
function SimpleAutoCompleteSearch() {
}
SimpleAutoCompleteSearch.prototype = {
classID: CLASS_ID,
classDescription: CLASS_NAME,
contractID: CONTRACT_ID,
/*
* Search for a given string and notify a listener (either synchronously
* or asynchronously) of the result
*
* @param searchString - The string to search for
* @param searchParam - An extra parameter
* @param previousResult - A previous result to use for faster searchinig
* @param listener - A listener to notify when the search is complete
*/
startSearch: function(searchString, searchParam, result, listener) {
// This autocomplete source assumes the developer attached a JSON string
// to the the "autocompletesearchparam" attribute or "searchParam" property
// of the <textbox> element. The JSON is converted into an array and used
// as the source of match data. Any values that match the search string
// are moved into temporary arrays and passed to the AutoCompleteResult
if (searchParam.length > 0) {
var nativeJSON = Components.classes["@mozilla.org/dom/json;1"].createInstance(Ci.nsIJSON);
var searchResults = nativeJSON.decode(searchParam);
var results = [];
var comments = [];
for (i=0; i<searchResults.length; i++) {
if (searchResults[i].value.indexOf(searchString) == 0) {
results.push(searchResults[i].value);
if (searchResults[i].comment)
comments.push(searchResults[i].comment);
else
comments.push(null);
}
}
var newResult = new SimpleAutoCompleteResult(searchString, Ci.nsIAutoCompleteResult.RESULT_SUCCESS, 0, "", results, comments);
listener.onSearchResult(this, newResult);
}
},
/*
* Stop an asynchronous search that is in progress
*/
stopSearch: function() {
},
QueryInterface: function(aIID) {
if (!aIID.equals(Ci.nsIAutoCompleteSearch) && !aIID.equals(Ci.nsISupports))
throw Components.results.NS_ERROR_NO_INTERFACE;
return this;
},
_QueryInterface: XPCOMUtils.generateQI([Components.interfaces.nsIAutoCompleteSearch])
};
// Factory
var SimpleAutoCompleteSearchFactory = {
singleton: null,
createInstance: function (aOuter, aIID) {
if (aOuter != null)
throw Components.results.NS_ERROR_NO_AGGREGATION;
if (this.singleton == null)
this.singleton = new SimpleAutoCompleteSearch();
return this.singleton.QueryInterface(aIID);
}
};
// Module
var SimpleAutoCompleteSearchModule = {
registerSelf: function(aCompMgr, aFileSpec, aLocation, aType) {
aCompMgr = aCompMgr.QueryInterface(Components.interfaces.nsIComponentRegistrar);
aCompMgr.registerFactoryLocation(CLASS_ID, CLASS_NAME, CONTRACT_ID, aFileSpec, aLocation, aType);
},
unregisterSelf: function(aCompMgr, aLocation, aType) {
aCompMgr = aCompMgr.QueryInterface(Components.interfaces.nsIComponentRegistrar);
aCompMgr.unregisterFactoryLocation(CLASS_ID, aLocation);
},
getClassObject: function(aCompMgr, aCID, aIID) {
if (!aIID.equals(Components.interfaces.nsIFactory))
throw Components.results.NS_ERROR_NOT_IMPLEMENTED;
if (aCID.equals(CLASS_ID))
return SimpleAutoCompleteSearchFactory;
throw Components.results.NS_ERROR_NO_INTERFACE;
},
canUnload: function(aCompMgr) { return true; }
};
// Module initialization
function NSGetModule(aCompMgr, aFileSpec) { return SimpleAutoCompleteSearchModule; }
if (XPCOMUtils.generateNSGetFactory){
var NSGetFactory = XPCOMUtils.generateNSGetFactory([SimpleAutoCompleteSearch]);
}
我将此代码添加到chrome.manifest：
component {6224daa1-71a2-4d1a-ad90-01ca1c08e323} components/simpleautocomplete.js
contract @mozilla.org/autocomplete/search;1?name=simple-autocomplete {6224daa1-71a2-4d1a-ad90-01ca1c08e323}
在xul文件中我添加了：
<textbox type="autocomplete" autocompletesearch="simple-autocomplete"
autocompletesearchparam='[{"value":"param1"},{"value":"param2"}]' />
重要提示：设置autocompletesearchparam属性时，赋值必须是两个单引号而不是双引号。只有里面的值必须是双引号，如上面的xul所示。
就是这样。
当我测试我的扩展并在自动完成文本框中键入“p”时，单词“param1”和“param2”加速。
我还可以在js文件中设置params，如下所示：
var searchTextField = document.getElementById("searchTextField");
var param1 = "Param1", param2 = "Param2";
paramsToSet = "[";
paramsToSet += "{\"value\" : \"" + param1 + "\"},";
paramsToSet += "{\"value\" : \"" + param2 + "\"},";
paramsToSet = paramsToSet.substring(0, paramsToSet.length-1); // to remove the last ","
paramsToSet += "]";
paramsToSet = paramsToSet.toLowerCase(); // important!
searchTextField.setAttribute("autocompletesearchparam", paramsToSet);
note1：请注意，自动完成文本框仅接受小写字母。
note2：如果将params设置为文本框是动态的并且需要一些时间，例如 - 当客户端在文本框中键入并且键入的文本被发送到服务器时，包含params的响应将附加到文本框，这个过程需要一些时间（大约一秒或一半），然后弹出自动完成将不会弹出，因为当客户端开始输入时，autocompletesearchparam为空。在这种情况下，当您在文本框中设置参数时，可以强制自动完成弹出：
searchTextField.open = true;