refactor: replaces lodash.memoize with alternatives

.c8rc.json

@@ -1,7 +1,7 @@
 {
   "checkCoverage": true,
   "statements": 99.3,
-  "branches": 89.6,
+  "branches": 89.5,
   "functions": 98.5,
   "lines": 99.3,
   "exclude": ["{src/render/graphics/styling,src/render/graphics/svgelementfactory/wobbly,src/parse/*parser.js,test/**/*,tools/**/*}"],

dist/cjs/main/lazy-resolver.js

@@ -1,36 +1,48 @@
 "use strict";
-var __importDefault = (this && this.__importDefault) || function (mod) {
-    return (mod && mod.__esModule) ? mod : { "default": mod };
-};
 Object.defineProperty(exports, "__esModule", { value: true });
-exports.getTextRenderer = exports.getGraphicsRenderer = exports.getParser = void 0;
-var memoize_1 = __importDefault(require("lodash/memoize"));
+exports.getParser = getParser;
+exports.getGraphicsRenderer = getGraphicsRenderer;
+exports.getTextRenderer = getTextRenderer;
 var DEFAULT_PARSER = "../parse/mscgenparser";
 var DEFAULT_TEXT_RENDERER = "../render/text/ast2mscgen";
-var gLang2Parser = Object.freeze({
-    mscgen: "../parse/mscgenparser",
-    xu: "../parse/xuparser",
-    msgenny: "../parse/msgennyparser",
-});
-var gLang2TextRenderer = Object.freeze({
-    mscgen: "../render/text/ast2mscgen",
-    msgenny: "../render/text/ast2msgenny",
-    xu: "../render/text/ast2xu",
-    dot: "../render/text/ast2dot",
-    doxygen: "../render/text/ast2doxygen",
-});
-exports.getParser = (0, memoize_1.default)(function (pLanguage) {
+var gLang2Parser = new Map([
+    ["mscgen", "../parse/mscgenparser"],
+    ["xu", "../parse/xuparser"],
+    ["msgenny", "../parse/msgennyparser"],
+]);
+var gLang2TextRenderer = new Map([
+    ["mscgen", "../render/text/ast2mscgen"],
+    ["msgenny", "../render/text/ast2msgenny"],
+    ["xu", "../render/text/ast2xu"],
+    ["dot", "../render/text/ast2dot"],
+    ["doxygen", "../render/text/ast2doxygen"],
+]);
+var parserMap = new Map();
+function getParser(pLanguage) {
     if (["ast", "json"].indexOf(pLanguage) > -1) {
         return JSON;
     }
-    return require(gLang2Parser[pLanguage] || DEFAULT_PARSER);
-});
-exports.getGraphicsRenderer = (0, memoize_1.default)(function () {
-    return require("../render/graphics/renderast");
-});
-exports.getTextRenderer = (0, memoize_1.default)(function (pLanguage) {
-    return require(gLang2TextRenderer[pLanguage] || DEFAULT_TEXT_RENDERER);
-});
+    if (!parserMap.has(pLanguage)) {
+        parserMap.set(pLanguage, require(gLang2Parser.get(pLanguage) || DEFAULT_PARSER));
+    }
+    return parserMap.get(pLanguage);
+}
+;
+var graphicsRenderer = null;
+function getGraphicsRenderer() {
+    if (!graphicsRenderer) {
+        graphicsRenderer = require("../render/graphics/renderast");
+    }
+    return graphicsRenderer;
+}
+var textRendererMap = new Map();
+function getTextRenderer(pLanguage) {
+    if (!textRendererMap.has(pLanguage)) {
+        textRendererMap.set(pLanguage, require(gLang2TextRenderer.get(pLanguage) || DEFAULT_TEXT_RENDERER));
+    }
+    return textRendererMap.get(pLanguage);
+}
+;
 /*
  This file is part of mscgen_js.
 

dist/cjs/render/graphics/svgutensils.js

@@ -22,21 +22,19 @@ var __importStar = (this && this.__importStar) || function (mod) {
     __setModuleDefault(result, mod);
     return result;
 };
-var __importDefault = (this && this.__importDefault) || function (mod) {
-    return (mod && mod.__esModule) ? mod : { "default": mod };
-};
 Object.defineProperty(exports, "__esModule", { value: true });
-exports.webkitNamespaceBugWorkaround = exports.calculateTextHeight = exports.init = void 0;
+exports.webkitNamespaceBugWorkaround = exports.init = void 0;
 exports.getBBox = getBBox;
+exports.calculateTextHeight = calculateTextHeight;
 exports.removeRenderedSVGFromElement = removeRenderedSVGFromElement;
-var memoize_1 = __importDefault(require("lodash/memoize"));
 var idmanager = __importStar(require("./idmanager"));
 var svgelementfactory = __importStar(require("./svgelementfactory/index"));
 /**
  * Some SVG specific calculations & workarounds
  */
 var gDocument = {};
 var gSvgBBoxerId = idmanager.get("bboxer");
+var gTextHeight = 0;
 /* istanbul ignore next */
 function _createBBoxerSVG(pId) {
     var lSvg = svgelementfactory.createSVG(pId, idmanager.get());
@@ -103,18 +101,25 @@ function getBBox(pElement) {
         };
     }
 }
-function _calculateTextHeight() {
+/**
+ * Returns the height in pixels necessary for rendering characters
+ */
+function calculateTextHeight() {
+    if (gTextHeight !== 0) {
+        return gTextHeight;
+    }
     /* Uses a string with some characters that tend to stick out
      * above/ below the current line and an 'astral codepoint' to
      * determine the text height to use everywhere.
      *
      * The astral \uD83D\uDCA9 codepoint mainly makes a difference in gecko based
      * browsers. The string in readable form: ÁjyÎ9ƒ@💩
      */
-    return getBBox(svgelementfactory.createText("\u00C1jy\u00CE9\u0192@\uD83D\uDCA9", {
+    gTextHeight = getBBox(svgelementfactory.createText("\u00C1jy\u00CE9\u0192@\uD83D\uDCA9", {
         x: 0,
         y: 0,
     })).height;
+    return gTextHeight;
 }
 function removeRenderedSVGFromElement(pElementId) {
     idmanager.setPrefix(pElementId);
@@ -133,10 +138,6 @@ var init = function (pDocument) {
     gDocument = pDocument;
 };
 exports.init = init;
-/**
- * Returns the height in pixels necessary for rendering characters
- */
-exports.calculateTextHeight = (0, memoize_1.default)(_calculateTextHeight);
 // webkit (at least in Safari Version 6.0.5 (8536.30.1) which is
 // distibuted with MacOSX 10.8.4) omits the xmlns: and xlink:
 // namespace prefixes in front of xlink and all hrefs respectively.

dist/es2015/main/lazy-resolver.js

@@ -1,26 +1,43 @@
-import memoize from "lodash/memoize";
 const DEFAULT_PARSER = "../parse/mscgenparser";
 const DEFAULT_TEXT_RENDERER = "../render/text/ast2mscgen";
-const gLang2Parser = Object.freeze({
-    mscgen: "../parse/mscgenparser",
-    xu: "../parse/xuparser",
-    msgenny: "../parse/msgennyparser",
-});
-const gLang2TextRenderer = Object.freeze({
-    mscgen: "../render/text/ast2mscgen",
-    msgenny: "../render/text/ast2msgenny",
-    xu: "../render/text/ast2xu",
-    dot: "../render/text/ast2dot",
-    doxygen: "../render/text/ast2doxygen",
-});
-export const getParser = memoize((pLanguage) => {
+const gLang2Parser = new Map([
+    ["mscgen", "../parse/mscgenparser"],
+    ["xu", "../parse/xuparser"],
+    ["msgenny", "../parse/msgennyparser"],
+]);
+const gLang2TextRenderer = new Map([
+    ["mscgen", "../render/text/ast2mscgen"],
+    ["msgenny", "../render/text/ast2msgenny"],
+    ["xu", "../render/text/ast2xu"],
+    ["dot", "../render/text/ast2dot"],
+    ["doxygen", "../render/text/ast2doxygen"],
+]);
+const parserMap = new Map();
+export function getParser(pLanguage) {
     if (["ast", "json"].indexOf(pLanguage) > -1) {
         return JSON;
     }
-    return require(gLang2Parser[pLanguage] || DEFAULT_PARSER);
-});
-export const getGraphicsRenderer = memoize(() => require("../render/graphics/renderast"));
-export const getTextRenderer = memoize((pLanguage) => require(gLang2TextRenderer[pLanguage] || DEFAULT_TEXT_RENDERER));
+    if (!parserMap.has(pLanguage)) {
+        parserMap.set(pLanguage, require(gLang2Parser.get(pLanguage) || DEFAULT_PARSER));
+    }
+    return parserMap.get(pLanguage);
+}
+;
+let graphicsRenderer = null;
+export function getGraphicsRenderer() {
+    if (!graphicsRenderer) {
+        graphicsRenderer = require("../render/graphics/renderast");
+    }
+    return graphicsRenderer;
+}
+const textRendererMap = new Map();
+export function getTextRenderer(pLanguage) {
+    if (!textRendererMap.has(pLanguage)) {
+        textRendererMap.set(pLanguage, require(gLang2TextRenderer.get(pLanguage) || DEFAULT_TEXT_RENDERER));
+    }
+    return textRendererMap.get(pLanguage);
+}
+;
 /*
  This file is part of mscgen_js.
 

dist/es2015/render/graphics/svgutensils.js

@@ -1,11 +1,11 @@
-import memoize from "lodash/memoize";
 import * as idmanager from "./idmanager";
 import * as svgelementfactory from "./svgelementfactory/index";
 /**
  * Some SVG specific calculations & workarounds
  */
 let gDocument = {};
 const gSvgBBoxerId = idmanager.get("bboxer");
+let gTextHeight = 0;
 /* istanbul ignore next */
 function _createBBoxerSVG(pId) {
     const lSvg = svgelementfactory.createSVG(pId, idmanager.get());
@@ -72,18 +72,25 @@ export function getBBox(pElement) {
         };
     }
 }
-function _calculateTextHeight() {
+/**
+ * Returns the height in pixels necessary for rendering characters
+ */
+export function calculateTextHeight() {
+    if (gTextHeight !== 0) {
+        return gTextHeight;
+    }
     /* Uses a string with some characters that tend to stick out
      * above/ below the current line and an 'astral codepoint' to
      * determine the text height to use everywhere.
      *
      * The astral \uD83D\uDCA9 codepoint mainly makes a difference in gecko based
      * browsers. The string in readable form: ÁjyÎ9ƒ@💩
      */
-    return getBBox(svgelementfactory.createText("\u00C1jy\u00CE9\u0192@\uD83D\uDCA9", {
+    gTextHeight = getBBox(svgelementfactory.createText("\u00C1jy\u00CE9\u0192@\uD83D\uDCA9", {
         x: 0,
         y: 0,
     })).height;
+    return gTextHeight;
 }
 export function removeRenderedSVGFromElement(pElementId) {
     idmanager.setPrefix(pElementId);
@@ -101,10 +108,6 @@ export function removeRenderedSVGFromElement(pElementId) {
 export const init = (pDocument) => {
     gDocument = pDocument;
 };
-/**
- * Returns the height in pixels necessary for rendering characters
- */
-export const calculateTextHeight = memoize(_calculateTextHeight);
 // webkit (at least in Safari Version 6.0.5 (8536.30.1) which is
 // distibuted with MacOSX 10.8.4) omits the xmlns: and xlink:
 // namespace prefixes in front of xlink and all hrefs respectively.