feat: Detect override of control "rerender"

src/linter/messages.ts

@@ -47,6 +47,7 @@ export enum MESSAGE {
 	HTML_IN_XML,
 	LIB_INIT_API_VERSION,
 	MISSING_BOOTSTRAP_PARAM,
+	NO_CONTROL_RERENDER_OVERRIDE,
 	NO_DEPRECATED_RENDERER,
 	NO_DIRECT_DATATYPE_ACCESS,
 	NO_DIRECT_ENUM_ACCESS,
@@ -316,6 +317,16 @@ export const MESSAGE_INFO = {
 		details: () => `{@link sap.ui.core.Lib.init Lib.init}`,
 	},
 
+	[MESSAGE.NO_CONTROL_RERENDER_OVERRIDE]: {
+		severity: LintMessageSeverity.Error,
+		ruleId: RULES["no-deprecated-api"],
+		message: ({className}: {className: string}) =>
+			`Override of deprecated method 'rerender' in control '${className}'`,
+		details: () => `Starting from UI5 1.121 the framework no longer calls 'rerender', ` +
+			`so there is no point in overriding it. ` +
+			`Move any rendering related code to the renderer or into onBeforeRendering/onAfterRendering.`,
+	},
+
 	[MESSAGE.NO_DEPRECATED_RENDERER]: {
 		severity: LintMessageSeverity.Error,
 		ruleId: RULES["no-deprecated-api"],

src/linter/ui5Types/SourceFileLinter.ts

@@ -6,7 +6,7 @@ import LinterContext, {ResourcePath, CoverageCategory} from "../LinterContext.js
 import {MESSAGE} from "../messages.js";
 import analyzeComponentJson from "./asyncComponentFlags.js";
 import {deprecatedLibraries, deprecatedThemes} from "../../utils/deprecations.js";
-import {getPropertyName, getSymbolForPropertyInConstructSignatures} from "./utils.js";
+import {findClassInstanceMethod, getPropertyName, getSymbolForPropertyInConstructSignatures} from "./utils.js";
 import {taskStart} from "../../utils/perf.js";
 import {getPositionsForNode} from "../../utils/nodePosition.js";
 import {TraceMap} from "@jridgewell/trace-mapping";
@@ -153,6 +153,7 @@ export default class SourceFileLinter {
 			ts.forEachChild(node, visitMetadataNodes);
 		} else if (this.isUi5ClassDeclaration(node, "sap/ui/core/Control")) {
 			this.analyzeControlRendererDeclaration(node);
+			this.analyzeControlRerenderMethod(node);
 		} else if (ts.isPropertyAssignment(node) && removeQuotes(node.name.getText()) === "theme") {
 			this.analyzeTestsuiteThemeProperty(node);
 		}
@@ -539,6 +540,15 @@ export default class SourceFileLinter {
 		}
 	}
 
+	analyzeControlRerenderMethod(node: ts.ClassDeclaration) {
+		const className = node.name?.getText() ?? "<unknown>";
+		const rerenderMethod = findClassInstanceMethod(node, "rerender", this.checker);
+		if (!rerenderMethod) {
+			return;
+		}
+		this.#reporter.addMessage(MESSAGE.NO_CONTROL_RERENDER_OVERRIDE, {className}, rerenderMethod);
+	}
+
 	analyzeMetadataProperty(type: string, node: ts.PropertyAssignment) {
 		const analyzeMetadataDone = taskStart(`analyzeMetadataProperty: ${type}`, this.resourcePath, true);
 		if (type === "interfaces") {

src/linter/ui5Types/utils.ts

@@ -23,3 +23,35 @@ export function getSymbolForPropertyInConstructSignatures(
 	}
 	return undefined;
 }
+
+export function findClassInstanceMethod(
+	node: ts.ClassDeclaration, methodName: string, checker: ts.TypeChecker
+): ts.ClassElement | undefined {
+	return node.members.find((member) => {
+		if (!member.name) {
+			return false;
+		}
+		const name = getPropertyName(member.name);
+		if (name !== methodName) {
+			return false;
+		}
+		if (ts.isMethodDeclaration(member)) {
+			return true;
+		}
+		if (ts.isPropertyDeclaration(member)) {
+			if (!member.initializer) {
+				return false;
+			}
+			if (ts.isFunctionExpression(member.initializer) || ts.isArrowFunction(member.initializer)) {
+				return true;
+			};
+			if (ts.isIdentifier(member.initializer)) {
+				const symbol = checker.getSymbolAtLocation(member.initializer);
+				if (symbol?.valueDeclaration && ts.isFunctionDeclaration(symbol.valueDeclaration)) {
+					return true;
+				}
+			}
+		}
+		return false;
+	});
+}

test/fixtures/linter/projects/sap.ui.core/src/sap/ui/core/Control.js

@@ -7,6 +7,9 @@ sap.ui.define(["./Element"], function(Element) {
 			library: "sap.ui.core",
 		},
 
+		// Should not be detected as declaration / override of a deprecated method
+		rerender: function() {},
+
 		renderer : null // Control has no renderer
 	});
 	return Control;

test/fixtures/linter/projects/sap.ui.core/src/sap/ui/core/Element.js

@@ -7,6 +7,9 @@ sap.ui.define(["../base/ManagedObject"], function(ManagedObject) {
 			library : "sap.ui.core"
 		},
 
+		// Should not be detected as declaration / override of a deprecated method
+		rerender: function() {},
+
 		renderer : null // Element has no renderer
 	});
 	return Element;

test/fixtures/linter/rules/renderer/ControlRerenderOverride.js

@@ -0,0 +1,122 @@
+sap.ui.define(["sap/ui/core/Control"], function(Control) {
+	const Example1 = Control.extend("sap.ui.demo.linter.controls.Example1", {
+		metadata: {},
+
+		rerender: function() {
+			console.log("Overriding rerender method");
+			return Control.prototype.rerender.apply(this, arguments);
+		},
+
+		renderer: {
+			apiVersion: 2,
+			render: function(oRm, oControl) {
+				oRm.openStart("div", oControl);
+				oRm.openEnd();
+				oRm.close("div");
+			}
+		}
+	});
+
+	const Example2 = Control.extend("sap.ui.demo.linter.controls.Example2", {
+		metadata: {},
+
+		"rerender": function() {
+			console.log("Overriding rerender method without calling super method");
+		},
+
+		renderer: {
+			apiVersion: 2,
+			render: function(oRm, oControl) {
+				oRm.openStart("div", oControl);
+				oRm.openEnd();
+				oRm.close("div");
+			}
+		}
+	});
+
+	const Example3 = Control.extend("sap.ui.demo.linter.controls.Example3", {
+		metadata: {},
+
+		rerender: () => {
+			console.log("Overriding rerender method without calling super method");
+		},
+
+		renderer: {
+			apiVersion: 2,
+			render: function(oRm, oControl) {
+				oRm.openStart("div", oControl);
+				oRm.openEnd();
+				oRm.close("div");
+			}
+		}
+	});
+
+	const Example4 = Control.extend("sap.ui.demo.linter.controls.Example4", {
+		metadata: {},
+
+		rerender() {
+			console.log("Overriding rerender method without calling super method");
+		},
+
+		renderer: {
+			apiVersion: 2,
+			render: function(oRm, oControl) {
+				oRm.openStart("div", oControl);
+				oRm.openEnd();
+				oRm.close("div");
+			}
+		}
+	});
+
+	const Example5 = Control.extend("sap.ui.demo.linter.controls.Example5", {
+		metadata: {},
+
+		renderer: {
+			apiVersion: 2,
+			render: function(oRm, oControl) {
+				oRm.openStart("div", oControl);
+				oRm.openEnd();
+				oRm.close("div");
+			}
+		}
+	});
+	// TODO detect: Check why this override is currently not detected in JavaScript files.
+	// The same code is detected properly in ControlRerenderOverrideTypeScript.ts.
+	Example5.prototype.rerender = function() {
+		console.log("Overriding rerender method without calling super method");
+	};
+
+	function rerender() {
+		console.log("Overriding rerender method without calling super method");
+	}
+
+	const Example6 = Control.extend("sap.ui.demo.linter.controls.Example6", {
+		metadata: {},
+
+		rerender,
+
+		renderer: {
+			apiVersion: 2,
+			render: function(oRm, oControl) {
+				oRm.openStart("div", oControl);
+				oRm.openEnd();
+				oRm.close("div");
+			}
+		}
+	});
+
+	const Example7 = Control.extend("sap.ui.demo.linter.controls.Example7", {
+		metadata: {},
+
+		rerender: rerender,
+
+		renderer: {
+			apiVersion: 2,
+			render: function(oRm, oControl) {
+				oRm.openStart("div", oControl);
+				oRm.openEnd();
+				oRm.close("div");
+			}
+		}
+	});
+});

test/fixtures/linter/rules/renderer/ControlRerenderOverrideTypeScript.ts

@@ -0,0 +1,125 @@
+import Control from "sap/ui/core/Control";
+import type { MetadataOptions } from "sap/ui/core/Element";
+import RenderManager from "sap/ui/core/RenderManager";
+
+/**
+ * @namespace sap.ui.demo.linter.controls
+ */
+class Example1 extends Control {
+	static readonly metadata: MetadataOptions = {}
+
+	rerender() {
+		console.log("Overriding rerender method");
+		return super.rerender();
+	}
+
+	static renderer = {
+		apiVersion: 2,
+		render: function(rm: RenderManager, control: Example1) {
+			rm.openStart("div", control);
+			rm.openEnd();
+			rm.close("div");
+		}
+	}
+}
+
+/**
+ * @namespace sap.ui.demo.linter.controls
+ */
+class Example2 extends Control {
+	static readonly metadata: MetadataOptions = {}
+
+	rerender() {
+		console.log("Overriding rerender method without calling super method");
+	}
+
+	static renderer = {
+		apiVersion: 2,
+		render: function(rm: RenderManager, control: Example2) {
+			rm.openStart("div", control);
+			rm.openEnd();
+			rm.close("div");
+		}
+	}
+}
+
+/**
+ * @namespace sap.ui.demo.linter.controls
+ */
+class Example3 extends Control {
+	static readonly metadata: MetadataOptions = {}
+
+	rerender = () => {
+		console.log("Overriding rerender method without calling super method");
+	}
+
+	static renderer = {
+		apiVersion: 2,
+		render: function(rm: RenderManager, control: Example3) {
+			rm.openStart("div", control);
+			rm.openEnd();
+			rm.close("div");
+		}
+	}
+}
+
+/**
+ * @namespace sap.ui.demo.linter.controls
+ */
+class Example4 extends Control {
+	static readonly metadata: MetadataOptions = {}
+
+	rerender = function() {
+		console.log("Overriding rerender method without calling super method");
+	}
+
+	static renderer = {
+		apiVersion: 2,
+		render: function(rm: RenderManager, control: Example4) {
+			rm.openStart("div", control);
+			rm.openEnd();
+			rm.close("div");
+		}
+	}
+}
+
+/**
+ * @namespace sap.ui.demo.linter.controls
+ */
+class Example5 extends Control {
+	static readonly metadata: MetadataOptions = {}
+
+	static renderer = {
+		apiVersion: 2,
+		render: function(rm: RenderManager, control: Example5) {
+			rm.openStart("div", control);
+			rm.openEnd();
+			rm.close("div");
+		}
+	}
+}
+Example5.prototype.rerender = function() {
+	console.log("Overriding rerender method without calling super method");
+};
+
+function rerender() {
+	console.log("Overriding rerender method without calling super method");
+}
+
+/**
+ * @namespace sap.ui.demo.linter.controls
+ */
+class Example6 extends Control {
+	static readonly metadata: MetadataOptions = {}
+
+	rerender = rerender
+
+	static renderer = {
+		apiVersion: 2,
+		render: function(rm: RenderManager, control: Example6) {
+			rm.openStart("div", control);
+			rm.openEnd();
+			rm.close("div");
+		}
+	}
+}