feat: Show reload button at editor title when there is reload required diagnostics

package.json

@@ -88,6 +88,12 @@
         "command": "java.project.update",
         "title": "%contributes.commands.java.project.update%"
       },
+      {
+        "command": "java.project.reloadProjectFromActiveFile",
+        "title": "%contributes.commands.java.project.reloadProjectFromActiveFile%",
+        "category": "Java",
+        "icon": "$(sync)"
+      },
       {
         "command": "java.project.rebuild",
         "title": "%contributes.commands.java.project.rebuild%"
@@ -282,6 +288,10 @@
         }
       ],
       "commandPalette": [
+        {
+          "command": "java.project.reloadProjectFromActiveFile",
+          "when": "false"
+        },
         {
           "command": "java.view.package.exportJar",
           "when": "java:serverMode == Standard && !java:noJavaProjects"
@@ -383,6 +393,13 @@
           "group": "navigation@100"
         }
       ],
+      "editor/title": [
+        {
+          "command": "java.project.reloadProjectFromActiveFile",
+          "when": "java:reloadProjectActive && javaLSReady",
+          "group": "navigation"
+        }
+      ],
       "editor/title/context": [
         {
           "command": "java.view.package.revealInProjectExplorer",

package.nls.json

@@ -9,6 +9,7 @@
   "contributes.commands.java.project.clean.workspace": "Clean Workspace",
   "contributes.commands.java.project.rebuild": "Rebuild Project",
   "contributes.commands.java.project.update": "Reload Project",
+  "contributes.commands.java.project.reloadProjectFromActiveFile": "Reload Java Project",
   "contributes.commands.java.view.package.revealInProjectExplorer": "Reveal in Java Project Explorer",
   "contributes.commands.java.view.package.changeToFlatPackageView":"Flat View",
   "contributes.commands.java.view.package.changeToHierarchicalPackageView":"Hierarchical View",

package.nls.zh-cn.json

@@ -9,6 +9,7 @@
   "contributes.commands.java.project.clean.workspace": "清理工作空间",
   "contributes.commands.java.project.rebuild": "重新构建项目",
   "contributes.commands.java.project.update": "重新加载项目",
+  "contributes.commands.java.project.reloadProjectFromActiveFile": "重新加载 Java 项目",
   "contributes.commands.java.view.package.revealInProjectExplorer": "在 Java 项目视图中显示",
   "contributes.commands.java.view.package.changeToFlatPackageView":"平行显示",
   "contributes.commands.java.view.package.changeToHierarchicalPackageView":"层级显示",

package.nls.zh-tw.json

@@ -9,6 +9,7 @@
   "contributes.commands.java.project.clean.workspace": "清理工作區",
   "contributes.commands.java.project.rebuild": "重新建置專案",
   "contributes.commands.java.project.update": "重新載入專案",
+  "contributes.commands.java.project.reloadProjectFromActiveFile": "重新載入 Java 專案",
   "contributes.commands.java.view.package.revealInProjectExplorer": "在 Java 專案視圖中顯示",
   "contributes.commands.java.view.package.changeToFlatPackageView":"平行顯示",
   "contributes.commands.java.view.package.changeToHierarchicalPackageView":"階層顯示",

src/commands.ts

@@ -64,6 +64,8 @@ export namespace Commands {
 
     export const JAVA_PROJECT_UPDATE = "java.project.update";
 
+    export const JAVA_PROJECT_RELOAD_ALL = "java.project.reloadProjectFromActiveFile";
+
     export const JAVA_PROJECT_REBUILD = "java.project.rebuild";
 
     export const JAVA_PROJECT_EXPLORER_FOCUS = "javaProjectExplorer.focus";

src/constants.ts

@@ -6,6 +6,7 @@ export namespace Context {
     export const LANGUAGE_SUPPORT_INSTALLED: string = "java:languageSupportInstalled";
     export const NO_JAVA_PROJECT: string = "java:noJavaProjects";
     export const WORKSPACE_CONTAINS_BUILD_FILES: string = "java:workspaceContainsBuildFiles";
+    export const RELOAD_PROJECT_ACTIVE: string = "java:reloadProjectActive";
 }
 
 export namespace Explorer {
@@ -31,3 +32,8 @@ export namespace Explorer {
 export namespace ExtensionName {
     export const JAVA_LANGUAGE_SUPPORT: string = "redhat.java";
 }
+
+/**
+ * The files names for all the build files we support.
+ */
+export const buildFiles = ["pom.xml", "build.gradle", "settings.gradle", "build.gradle.kts", "settings.gradle.kts"];

src/extension.ts

@@ -1,11 +1,13 @@
 // Copyright (c) Microsoft Corporation. All rights reserved.
 // Licensed under the MIT license.
 
-import { commands, Extension, ExtensionContext, extensions, tasks, Uri, workspace } from "vscode";
-import { dispose as disposeTelemetryWrapper, initializeFromJsonFile, instrumentOperation, sendInfo } from "vscode-extension-telemetry-wrapper";
+
+import * as path from "path";
+import { commands, Diagnostic, Extension, ExtensionContext, extensions, languages, tasks, TextDocument, TextEditor, Uri, window, workspace } from "vscode";
+import { dispose as disposeTelemetryWrapper, initializeFromJsonFile, instrumentOperation, instrumentOperationAsVsCodeCommand, sendInfo } from "vscode-extension-telemetry-wrapper";
 import { Commands, contextManager } from "../extension.bundle";
 import { BuildTaskProvider } from "./tasks/build/buildTaskProvider";
-import { Context, ExtensionName } from "./constants";
+import { buildFiles, Context, ExtensionName } from "./constants";
 import { LibraryController } from "./controllers/libraryController";
 import { ProjectController } from "./controllers/projectController";
 import { init as initExpService } from "./ExperimentationService";
@@ -40,6 +42,28 @@ async function activateExtension(_operationId: string, context: ExtensionContext
     context.subscriptions.push(syncHandler);
     context.subscriptions.push(tasks.registerTaskProvider(ExportJarTaskProvider.exportJarType, new ExportJarTaskProvider()));
     context.subscriptions.push(tasks.registerTaskProvider(BuildTaskProvider.type, new BuildTaskProvider()));
+
+    context.subscriptions.push(window.onDidChangeActiveTextEditor((e: TextEditor | undefined) => {
+        setContextForReloadProject(e?.document);
+    }));
+    context.subscriptions.push(languages.onDidChangeDiagnostics(() => {
+        setContextForReloadProject(window.activeTextEditor?.document);
+    }));
+    instrumentOperationAsVsCodeCommand(Commands.JAVA_PROJECT_RELOAD_ALL, (uri?: Uri) => {
+        if (!uri) {
+            const activeDocument = window.activeTextEditor?.document;
+            if (!activeDocument) {
+                return;
+            }
+            uri = activeDocument.uri;
+        }
+
+        if (!buildFiles.includes(path.basename(uri.fsPath))) {
+            return;
+        }
+
+        commands.executeCommand(Commands.JAVA_PROJECT_CONFIGURATION_UPDATE, uri);
+    });
 }
 
 // this method is called when your extension is deactivated
@@ -61,3 +85,23 @@ function addExtensionChangeListener(context: ExtensionContext): void {
         context.subscriptions.push(extensionChangeListener);
     }
 }
+
+/**
+ * Set the context value when reload diagnostic is detected for the active
+ * build file.
+ */
+function setContextForReloadProject(document: TextDocument | undefined): void {
+    if (!document || !buildFiles.includes(path.basename(document.fileName))) {
+        contextManager.setContextValue(Context.RELOAD_PROJECT_ACTIVE, false);
+        return;
+    }
+
+    const diagnostics: Diagnostic[] = languages.getDiagnostics(document.uri);
+    for (const diagnostic of diagnostics) {
+        if (diagnostic.message.startsWith("The build file has been changed")) {
+            contextManager.setContextValue(Context.RELOAD_PROJECT_ACTIVE, true);
+            return;
+        }
+    }
+    contextManager.setContextValue(Context.RELOAD_PROJECT_ACTIVE, false);
+}

test/maven-suite/context.test.ts

@@ -0,0 +1,35 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT license.
+
+import * as path from "path";
+import * as assert from "assert";
+import { Diagnostic, DiagnosticSeverity, languages, Position, Range, Uri, window } from "vscode";
+import { contextManager } from "../../extension.bundle";
+import { setupTestEnv, Uris } from "../shared";
+import { sleep } from "../util";
+
+// tslint:disable: only-arrow-functions
+suite("Context Manager Tests", () => {
+
+    suiteSetup(setupTestEnv);
+
+    test("Can set reload project context correctly", async function() {
+        assert.strictEqual(!!contextManager.getContextValue("java:reloadProjectActive"), false);
+
+        const pomUri = Uri.file(path.join(Uris.MAVEN_PROJECT_NODE, "pom.xml"));
+        await window.showTextDocument(pomUri);
+        assert.strictEqual(!!contextManager.getContextValue("java:reloadProjectActive"), false);
+
+        const collection = languages.createDiagnosticCollection("test-collection");
+        collection.set(pomUri, [new Diagnostic(
+            new Range(new Position(0, 0), new Position(0, 0)),
+            "The build file has been changed and may need reload to make it effective.",
+            DiagnosticSeverity.Information
+        )]);
+        await sleep(1000);
+        assert.strictEqual(!!contextManager.getContextValue("java:reloadProjectActive"), true);
+
+        await window.showTextDocument(Uri.file(Uris.MAVEN_MAIN_CLASS));
+        assert.strictEqual(!!contextManager.getContextValue("java:reloadProjectActive"), false);
+    });
+});