Eclipse 2023-12: Add sample code and narration; update features to show

README.md

@@ -19,7 +19,7 @@
 [2019-06](https://github.com/howlger/Eclipse-IDE-improvements-videos/tree/2019-06)
 </sup>
 
-# +++ Work in progress (for December 6, 2023) +++<br>Eclipse IDE 2023-12 Improvements Video <!--[Eclipse IDE 2023-12 Improvements Video](https://youtu.be/bUnx9_jF-i)-->
+# [Eclipse IDE 2023-12 Improvements Video](https://youtu.be/ilM7GY1uEYI)
 
 * [December 6, 2023](https://calendar.google.com/calendar/event?eid=MnZoYWYyaDZrZnRuOWtpdG9ucjh0NDQwMDYgZ2NoczdubTRudnBtODM3NDY5ZGRqOXRqbGtAZw&ctz=Europe/Berlin) ([calendar](https://calendar.google.com/calendar/[email protected]&ctz=Europe/Berlin)) - [projects](https://projects.eclipse.org/releases/2023-12) - [wiki](https://wiki.eclipse.org/Category:SimRel-2023-12) - [website](https://eclipse.org/eclipseide/2023-12) ([New & Noteworthy](https://eclipse.org/eclipseide/2023-12/noteworthy)) - [splash screen](https://gitlab.eclipse.org/eclipsefdn/helpdesk/-/issues/2336)
 * Builds: [latest unreleased](https://download.eclipse.org/technology/epp/staging/) → [released](https://download.eclipse.org/technology/epp/downloads/release/2023-12/) ([Jenkins](https://ci.eclipse.org/packaging/job/simrel.epp-tycho-build), [*.aggrcon](https://github.com/eclipse-simrel/simrel.build/commits/main), update sites: [staging](https://download.eclipse.org/staging/2023-12), [release](http://download.eclipse.org/releases/2023-12))
@@ -38,7 +38,7 @@
 * General
     * **Platform** 4.29→**4.30**: [Eclipse 4.30 - New and Noteworthy - Platform and Equinox](https://www.eclipse.org/eclipse/news/4.30/platform.php) ([log](https://github.com/eclipse-platform/www.eclipse.org-eclipse/commits/master/news/4.30/platform.html)), Git [UI](https://github.com/eclipse-platform/eclipse.platform.ui/commits/master) [platform](https://github.com/eclipse-platform/eclipse.platform/commits/master)
     * ([Marketplace Client (MPC)](https://projects.eclipse.org/projects/technology.packaging.mpc) 1.10.1→**1.10.2**: [commits](https://github.com/eclipse-mpc/epp.mpc/commits/master), [issues](https://github.com/eclipse-mpc/epp.mpc/issues))
-    * [Mylyn](https://projects.eclipse.org/projects/tools.mylyn) (task-focused UI) 4.0.0→**[4.1.0](https://github.com/eclipse-mylyn/org.eclipse.mylyn/milestone/3?closed=1)**: [commits](https://github.com/eclipse-mylyn/org.eclipse.mylyn/commits/main)
+    * [Mylyn](https://projects.eclipse.org/projects/tools.mylyn) (task-focused UI) 4.0.0→[**4.1.0**](https://github.com/eclipse-mylyn/org.eclipse.mylyn/milestone/4?closed=1): [commits](https://github.com/eclipse-mylyn/org.eclipse.mylyn/commits/main)
     * (Mylyn WikiText (Markdown editor, etc.) 3.0.48→**3.0.49**: [commits](https://github.com/eclipse-mylyn/org.eclipse.mylyn.docs/compare/wikitext.core-3.0.48...wikitext.core-3.0.49))
     * ([Oomph](https://projects.eclipse.org/projects/tools.oomph) 1.30→**1.31**: [commits](https://github.com/eclipse-oomph/oomph/commits/master), [issus](https://github.com/eclipse-oomph/oomph/issues?q=is%3Aissue+is%3Aclosed+sort%3Aupdated-desc))
     * (EPP: [changelog](https://github.com/eclipse-packaging/packages/blob/master/CHANGELOG.md#2023-12), [commits](https://github.com/eclipse-packaging/packages/commits/master), [issues](https://github.com/eclipse-packaging/packages/issues))
@@ -59,7 +59,7 @@
 
 ### Features to show
 
-* **Java<!-- [📽️](https://youtu.be/bUnx9_jF-ig?t=17)-->**
+* **Java [📽️](https://youtu.be/ilM7GY1uEYI?t=15)**
     * [Java 21 support](https://eclipse.dev/eclipse/news/4.30/jdt.php#Java_21)
         * [Record Patterns (JEP 440)](https://openjdk.org/jeps/440)
         * [Pattern Matching for switch (JEP 441)](https://openjdk.org/jeps/441)
@@ -77,17 +77,17 @@
         * ([In P2Utils.findBundle() the check if the bundle file exists is deferred to the latest possibility in order to speed-up the search if multiple versions are present](https://github.com/eclipse-jdt/eclipse.jdt.ui/commit/80cdc892db1271aaeffd5ea88c73c74b088dcb07))
         * ([Use JavaElementComparator in CleanUpRefactoringWizard](https://github.com/eclipse-jdt/eclipse.jdt.ui/commit/3f6796695adf6fdd9d607cd200f9af05f5c1d20d))
         * ([Avoid O(n^2) in ContentProviders](https://github.com/eclipse-jdt/eclipse.jdt.ui/commit/aadde02f88c7529c28842d389d4c9b30c3b0ee7b))
-    * (**Maven<!-- [📽️](https://youtu.be/bUnx9_jF-ig?t=140)-->**)
-    * (**Gradle<!-- [📽️](https://youtu.be/bUnx9_jF-ig?t=140)-->**:)
+    * (**Maven<!-- [📽️](https://youtu.be/ilM7GY1uEYI?t=000)-->**)
+    * (**Gradle<!-- [📽️](https://youtu.be/ilM7GY1uEYI?t=000)-->**:)
         * ([Kotlin DSL editor support](https://gist.github.com/D0zee/90b63a9cfd2edb7a039f111e2406f5b8#file-gsoc-md): optional installable feature; does not work on Windows yet (by Nikolai Vladimirov in the Google Summer of Code program))
-* **General/Platform<!-- [📽️](https://youtu.be/bUnx9_jF-ig?t=222)-->**
+* (**General/Platform<!-- [📽️](https://youtu.be/ilM7GY1uEYI?t=000)-->**)
     * ([Opening a directory shows existing projects in Project Explorer](https://github.com/eclipse-platform/eclipse.platform.ui/commit/35a5e7bfdc632a8ec9e752c8e068a010c2c346dc) (instead of running always the import wizard as in the past): seems not to work on Windows)
     * ([UI](https://github.com/search?utf8=%E2%9C%93&q=dark+OR+light+OR+theme+OR+layout+org%3Aeclipse-platform+org%3Aeclipse-jdt+committer-date%3A2023-09-05..2023-12-10&s=committer-date&type=Commits))
     * ([Performance](https://github.com/search?utf8=%E2%9C%93&q=performance+OR+speed+OR+fast+OR+faster+OR+slow+org%3Aeclipse-platform+committer-date%3A2023-09-05..2023-12-10&s=committer-date&o=desc&type=Commits):)
         * ([PropertyManager2 iterates the tree for infinite depth for deleting/moving an IFile](https://github.com/eclipse-platform/eclipse.platform/commit/5e0a9979f91c067059ccb88cbe5166f82b3492a3))
     * (Mylyn:)
         * ([Performance: Use an OSGi declarative service instead of IStartup](https://github.com/eclipse-mylyn/org.eclipse.mylyn/pull/201))
-* **Web<!-- [📽️](https://youtu.be/bUnx9_jF-ig?t=238)-->**
+* **Web [📽️](https://youtu.be/ilM7GY1uEYI?t=236)**
     * Latest [TypeScript 5.2](https://devblogs.microsoft.com/typescript/announcing-typescript-5-2) (e.g. [`using ...`](https://devblogs.microsoft.com/typescript/announcing-typescript-5-2/#using-declarations-and-explicit-resource-management)) and ECMAScript/JavaScript:
         * [_Code Actions > Inline variable_](https://devblogs.microsoft.com/typescript/announcing-typescript-5-2/#inline-variable-refactoring)
     * ([Allow using TypeScript version specified by project](https://github.com/eclipse-wildwebdeveloper/wildwebdeveloper/pull/1308))
@@ -96,7 +96,7 @@
         * [Support (code completion and no warnings anymore) for the properties `container`, `container-name` and `container-type`](https://github.com/microsoft/vscode-css-languageservice/pull/365), e.g. `div { container-type: size; }`
         * ([Support (no errors anymore) for `<timeline-range-name>` in `@keyframes`](https://github.com/microsoft/vscode-css-languageservice/pull/355), e.g. `@keyframes sample { cover 50% { color: red; } }` ([experimental](https://developer.mozilla.org/en-US/docs/Web/CSS/@keyframes#timeline-range-name)))
     * [Vue support: code completion for Vue-specific things](https://github.com/eclipse-wildwebdeveloper/wildwebdeveloper/issues/1332), e.g. `<li v-|` ([project name must not contain spaces](https://github.com/eclipse-wildwebdeveloper/wildwebdeveloper/issues/1413))
-* (**Git<!-- [📽️](https://youtu.be/bUnx9_jF-ig?t=000)-->**)
+* (**Git<!-- [📽️](https://youtu.be/ilM7GY1uEYI?t=000)-->**)
     * (Performance:)
         * ([Optimize RefDirectory.getRefsByPrefix(String...)](https://github.com/eclipse-jgit/jgit/commit/4f18c5095049116350828e9bb499964ea887ac02))
         * ([RepositoryTreeNode: cache hashCode](https://github.com/eclipse-egit/egit/commit/981b7278c232903ff22cf66d81552907bee86609))

reset_workspace_and_installation.bat

@@ -1,4 +1,4 @@
-set IDE=java-2023-09
+set IDE=java-2023-12
 set REPO=sample
 
 set ECLIPSE_DIR=%USERPROFILE%\eclipse\%IDE%
@@ -13,7 +13,7 @@ set REPO_ZIP=%USERPROFILE%\git\%REPO%.7z
 ::start C:\Users\Howlger\eclipse-installer\eclipse-inst.exe
 ::echo|set/p=^^^<project.build.sourceEncoding^^^>UTF-8^^^</project.build.sourceEncoding^^^>|clip
 ::echo|set/p=""C:\Program Files\Java\jdk-20-ea\bin\javac^" -d . src\main\java\BytecodeSample.java"|clip
-::echo|set/p="C:\Program Files\Eclipse Adoptium\jdk-20.0.1.9-hotspot"|clip
+echo|set/p="C:\Program Files\Eclipse Adoptium\jdk-21.0.1.12-hotspot"|clip
 
 dir "%ECLIPSE_DIR%\p2"
 

sample_code/Eclipse_2023-12_Improvements/.classpath

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<classpath>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-21">
+		<attributes>
+			<attribute name="module" value="true"/>
+		</attributes>
+	</classpathentry>
+	<classpathentry kind="src" path="src"/>
+	<classpathentry kind="output" path="bin"/>
+</classpath>

sample_code/Eclipse_2023-12_Improvements/.project

@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>Eclipse_2023-12_Improvements</name>
+	<comment></comment>
+	<projects>
+	</projects>
+	<buildSpec>
+		<buildCommand>
+			<name>org.eclipse.jdt.core.javabuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+	</buildSpec>
+	<natures>
+		<nature>org.eclipse.jdt.core.javanature</nature>
+	</natures>
+</projectDescription>

sample_code/Eclipse_2023-12_Improvements/.settings/org.eclipse.core.resources.prefs

@@ -0,0 +1,2 @@
+eclipse.preferences.version=1
+encoding/<project>=UTF-8

sample_code/Eclipse_2023-12_Improvements/.settings/org.eclipse.jdt.core.prefs

@@ -0,0 +1,15 @@
+eclipse.preferences.version=1
+org.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode=enabled
+org.eclipse.jdt.core.compiler.codegen.methodParameters=do not generate
+org.eclipse.jdt.core.compiler.codegen.targetPlatform=21
+org.eclipse.jdt.core.compiler.codegen.unusedLocal=preserve
+org.eclipse.jdt.core.compiler.compliance=21
+org.eclipse.jdt.core.compiler.debug.lineNumber=generate
+org.eclipse.jdt.core.compiler.debug.localVariable=generate
+org.eclipse.jdt.core.compiler.debug.sourceFile=generate
+org.eclipse.jdt.core.compiler.problem.assertIdentifier=error
+org.eclipse.jdt.core.compiler.problem.enablePreviewFeatures=disabled
+org.eclipse.jdt.core.compiler.problem.enumIdentifier=error
+org.eclipse.jdt.core.compiler.problem.reportPreviewFeatures=warning
+org.eclipse.jdt.core.compiler.release=enabled
+org.eclipse.jdt.core.compiler.source=21

sample_code/Eclipse_2023-12_Improvements/App.vue

@@ -0,0 +1,10 @@
+<script setup>
+import { ref } from 'vue'
+const data = ref(["First", "Second"])
+</script>
+<template>
+	<ul v-if="data.length">
+		<li>{{  }}</li>
+	</ul>
+	<p v-else>No data</p>
+</template>

sample_code/Eclipse_2023-12_Improvements/TempFile.ts

@@ -0,0 +1,31 @@
+declare global {
+	export interface SymbolConstructor {
+		readonly dispose: symbol;
+	}
+}
+
+export interface Symbol {
+	readonly [Symbol.dispose]: symbol;
+}
+
+export class TempFile {
+	#path: string;
+
+	constructor(path: string) {
+		this.#path = path;
+	}
+
+	[Symbol.dispose]() {
+		// Here you can add the logic to delete the file
+		// For example, you can use the fs module in Node.js to delete the file
+		// fs.unlinkSync(this.#path);
+	}
+
+	write(content: String): void {
+		console.log(content)
+	}
+
+	getPath(): string {
+		return this.#path;
+	}
+}

sample_code/Eclipse_2023-12_Improvements/sample.css

@@ -0,0 +1,11 @@
+
+li:nth-child(1 of .active) {
+	color: green;
+}
+li:nth-last-child(1 of .not-hidden) {
+	color: orange;
+}
+
+.container {
+	background-color: gray;
+	}

sample_code/Eclipse_2023-12_Improvements/sample.js

@@ -0,0 +1,8 @@
+export function sample() {
+	const path = ".temp_file";
+	const file = fs.openSync(path, "rw");
+	using cleanup = new DisposableStack();
+	cleanup.defer(() => {
+		fs.closeSync(file); b > fs.unlinkSync(path);
+	})
+}

sample_code/Eclipse_2023-12_Improvements/sample.ts

@@ -0,0 +1,23 @@
+import { TempFile } from "./TempFile";
+
+const path = ".temp_file"
+
+export function withUsing() {
+    using file = new TempFile(path);
+
+    // use file...
+    file.write("...")
+
+    // `Symbol.dispose` is called implicitly at the end of the scope
+}
+
+export function withoutUsing() {
+	const file = new TempFile(path);
+	try {
+		// use file...
+		file.write("...")
+	}
+	finally {
+		file[Symbol.dispose]();
+	}
+}

sample_code/Eclipse_2023-12_Improvements/src/com/example/Java21.java

@@ -0,0 +1,46 @@
+package com.example;
+class Java21 {
+	int sample(Object item, Pair pair, NamedPair namedPair) {
+
+		// Pattern Matching for switch (JEP 441)
+		switch (item) {
+		case String s:
+			System.out.println(s);
+			break;
+		case Object obj:
+			System.out.println("Unknown item");
+		}
+
+
+		// Record Patterns (JEP 440)...
+
+		// ... switch statement
+		switch (pair) {
+		case Pair(Integer x, Integer y):
+			System.out.println(x + y);
+			break;
+		case Pair(Object a, Object b):
+			break;
+		}
+
+		// ... switch expression
+		int result = switch (pair) {
+		case Pair(Integer level, Boolean enabled) when enabled -> level;
+		default -> -1;
+		};
+
+		// ... if
+		if (pair instanceof Pair(Integer x, Integer y)) {
+			return x + y;
+		}
+
+		// nested
+		if (namedPair instanceof NamedPair(String name, Pair(Integer x, Integer y))) {
+			System.out.println(name);
+			return x + y;
+		}
+		return result;
+	}
+	record Pair(Object x, Object y) {}
+	record NamedPair(String name, Pair pair) {}
+}

sample_code/Eclipse_2023-12_Improvements/src/com/example/Sample.java

@@ -0,0 +1,28 @@
+package com.example;
+class Sample {
+
+	void printFactor(int x, int y) {
+		int boost = Api.getFactor(x, y);
+		System.out.println(boost);
+	}
+
+}
+
+class Api {
+
+	private static final int mask = 0xff;
+
+	/**
+	 * @deprecated use {@link #getFactor(int)} instead
+	 */
+	@Deprecated
+	public static int getFactor(int x, int y) {
+		int z = x + y;
+		return getFactor(z);
+	}
+
+	public static int getFactor(int a) {
+		return a & mask;
+	}
+
+}