128 lines
3.7 KiB
JavaScript
128 lines
3.7 KiB
JavaScript
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/*
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Copyright 2013 Daniel Wirtz <dcode@dcode.io>
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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var ProtoBuf = require("../../index.js");
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/**
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* Utility namespace.
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* @exports pbjs/util
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* @namespace
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*/
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var util = module.exports = {};
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/**
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* Extracts builder options with the specified prefix from a set of CLI options.
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* @param {!Object.<string,*>} options CLI options
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* @param {string} prefix Prefix
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* @returns {!Object.<string,*>}
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*/
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util.getBuilderOptions = function(options, prefix) {
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if (!options[prefix])
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return {};
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var builderOptions = {};
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options[prefix].forEach(function(kv) {
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var key, val;
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var p = kv.indexOf("=");
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if (p < 0) {
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key = kv;
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val = true;
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} else {
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key = kv.substring(0, p);
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val = kv.substring(p+1);
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if (val === "true")
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val = true;
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else if (val === "false")
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val = false;
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else {
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var intval = parseInt(val, 10);
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if (intval == val)
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val = intval;
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}
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}
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builderOptions[key] = val;
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});
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return builderOptions;
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};
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/**
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* Pads a string to the specified length.
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* @param {string} str String to pad
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* @param {number} len Pad length
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* @param {boolean=} left Whether to pad to the left, defaults to `false`
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* @returns {string}
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*/
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util.pad = function(str, len, left) {
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while (str.length < len)
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left ? str = " "+str : str += " ";
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return str;
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};
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/**
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* Indents a string by the specified whitespace.
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* @param {string} str String to indent
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* @param {string|number} ws Whitespace string or number of whitespaces
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* @returns {string}
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*/
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util.indent = function(str, ws) {
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if (ws === 0 || ws === "")
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return str;
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var lines = str.split(/\r?\n/);
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if (typeof ws === 'number') {
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var n = ws; ws = "";
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while (ws.length < n) ws += " ";
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}
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for (var i=1; i<lines.length; ++i)
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lines[i] = ws+lines[i];
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return lines.join("\n");
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};
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/**
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* Extends an object with additional properties.
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* @param {!Object.<string,*>} subject Subject to extend
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* @param {!Object.<string,*>} extension Extensions to apply
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*/
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util.extend = function(subject, extension) {
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Object.keys(extension).forEach(function(key) {
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subject[key] = extension[key];
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});
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};
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/**
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* Groups extensions by extended message.
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* @param {!ProtoBuf.Reflect.Namespace} ns Namespace
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* @returns {?Object.<string,!Array.<!ProtoBuf.Reflect.Message.ExtensionField>>}
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*/
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util.groupExtensions = function(ns) {
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var exts = {},
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n = 0;
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ns.getChildren(ProtoBuf.Reflect.Extension).forEach(function(ext) {
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var msg = ext.field.parent,
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fqn = msg.fqn();
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if (!exts[fqn])
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exts[fqn] = [];
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exts[fqn].push(ext.field);
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n++;
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});
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return n > 0 ? exts : null;
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};
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/**
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* Tests if the specified import name is referencing an internal descriptor.
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* @param {string} name Import name
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* @returns {boolean}
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*/
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util.isDescriptor = function(name) {
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return /^google\/protobuf\/descriptor/.test(name);
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};
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