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116 lines
4.0 KiB
116 lines
4.0 KiB
/**
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* @fileOverview Completion request handler for skewer.js
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* @requires skewer
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* @version 1.0
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*/
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/**
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* Handles a completion request from Emacs.
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* @param request The request object sent by Emacs
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* @returns The completions and init values to be returned to Emacs
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*/
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skewer.fn.complete = function(request) {
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var result = {
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type : request.type,
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id : request.id,
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strict : request.strict,
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status : "success"
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},
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/**
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* Methods for generating candidates
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*/
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METHOD = {
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EVAL : 0,
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GLOBAL : 1
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},
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/**
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* Add the properties from object to extendObject. Properties
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* may be from the prototype but we still want to add them.
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*/
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extend = function(extendObject, object) {
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for(var key in object) {
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extendObject[key] = object[key];
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}
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},
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globalCompletion = function() {
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var global = Function('return this')(),
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keys = Object.keys(global);
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candidates = buildCandidates(global, keys);
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},
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evalCompletion = function(evalObject) {
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var obj = (eval, eval)(evalObject);
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if (typeof obj === "object") {
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candidates = buildCandidates(obj) || {};
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while (request.prototypes && (obj = Object.getPrototypeOf(obj)) !== null) {
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extend(candidates, buildCandidates(obj));
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}
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} else if (typeof obj === "function"){
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candidates = buildCandidates(obj) || {};
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extend(candidates, buildCandidates(Object.getPrototypeOf(obj)));
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if (request.prototypes) {
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var protoObject = Object.getPrototypeOf(obj.prototype);
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if (protoObject !== null) {
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extend(candidates, buildCandidates(protoObject));
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} else {
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extend(candidates, buildCandidates(obj.prototype));
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}
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}
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}
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},
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/**
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* Completion candidates sent back to Emacs. Keys are
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* completion candidates the values are the inital items or
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* function interfaces.
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*/
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candidates = {},
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/**
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* Build the candiates to return to Emacs.
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* @param obj The object to get candidates from
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* @param items The selected keys from obj to create candidates for
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* @return object containing completion candidates and documentation strings
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*/
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buildCandidates = function(obj, items) {
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var keys = items || Object.getOwnPropertyNames(obj), values = {};
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for (var i = 0; i < keys.length; i++) {
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var key = keys[i];
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if (key === "callee" || key === "caller" || key === "arguments") continue;
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if (Object.prototype.toString.call(obj[key]) === "[object Function]") {
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values[key] = obj[key].toString();
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} else if (typeof obj[key] === "object"){
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values[key] = "[object Object]";
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} else if (typeof obj[key] === "number") {
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if (!(obj instanceof Array)) {
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values[key] = obj[key].toString();
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}
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} else if (typeof obj[key] === "string") {
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values[key] = obj[key].toString();
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} else if(obj[key] === true) {
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values[key] = "true";
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} else if (obj[key] === false) {
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values[key] = "false";
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} else {
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values[key] = "";
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}
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}
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return values;
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};
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try {
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switch (request.method) {
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case METHOD.GLOBAL:
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globalCompletion();
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break;
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default:
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evalCompletion(request.eval);
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}
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result.value = candidates;
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} catch (error){
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skewer.errorResult(error, result, request);
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}
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return result;
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};
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