Support for pasting a java file in the file explorer

Signed-off-by: Hope Hadfield <hhadfiel@redhat.com>

package.json

@@ -1487,6 +1487,11 @@
         "command": "java.server.restart",
         "title": "%java.server.restart%",
         "category": "Java"
+      },
+      {
+        "command": "java.action.filesExplorerPasteAction",
+        "title": "%java.action.filesExplorerPasteAction%",
+        "category": "Java"
       }
     ],
     "keybindings": [
@@ -1504,6 +1509,12 @@
         "key": "ctrl+shift+v",
         "mac": "cmd+shift+v",
         "when": "javaLSReady && editorLangId == java"
+      },
+      {
+        "command": "java.action.filesExplorerPasteAction",
+        "key": "ctrl+shift+v",
+        "mac": "cmd+shift+v",
+        "when": "explorerViewletFocus && config.editor.pasteAs.enabled"
       }
     ],
     "menus": {
@@ -1622,6 +1633,10 @@
         {
           "command": "java.server.restart",
           "when": "javaLSReady"
+        },
+        {
+          "command": "java.action.filesExplorerPasteAction",
+          "when": "false"
         }
       ],
       "view/title": [

package.nls.json

@@ -25,5 +25,6 @@
 	"java.project.createModuleInfo.command": "Create module-info.java",
 	"java.clean.sharedIndexes": "Clean Shared Indexes",
 	"java.server.restart": "Restart Java Language Server",
-	"java.edit.smartSemicolonDetection": "Java Smart Semicolon Detection"
+	"java.edit.smartSemicolonDetection": "Java Smart Semicolon Detection",
+	"java.action.filesExplorerPasteAction": "Paste clipboard text into a file"
 }

package.nls.ko.json

@@ -22,5 +22,6 @@
 	"java.action.showSupertypeHierarchy": "Supertype 계층 구조 표시",
 	"java.action.showSubtypeHierarchy": "Subtype 계층 구조 표시",
 	"java.action.changeBaseType": "이 유형을 기준으로",
-	"java.project.createModuleInfo.command": "module-info.java 생성"
+	"java.project.createModuleInfo.command": "module-info.java 생성",
+	"java.action.filesExplorerPasteAction": "클립보드 텍스트를 파일에 붙여넣기"
 }

package.nls.zh-cn.json

@@ -23,5 +23,6 @@
 	"java.action.showSubtypeHierarchy": "显示子类层次结构",
 	"java.action.changeBaseType": "基于此类型",
 	"java.project.createModuleInfo.command": "创建 module-info.java",
-	"java.clean.sharedIndexes": "清理共享的索引文件"
+	"java.clean.sharedIndexes": "清理共享的索引文件",
+	"java.action.filesExplorerPasteAction": "将剪贴板文本粘贴到文件中"
 }

package.nls.zh-tw.json

@@ -22,5 +22,6 @@
 	"java.action.showSupertypeHierarchy": "顯示父類別階層結構",
 	"java.action.showSubtypeHierarchy": "顯示子類別階層結構",
 	"java.action.changeBaseType": "以此型別為基礎",
-	"java.project.createModuleInfo.command": "創建 module-info.java"
+	"java.project.createModuleInfo.command": "創建 module-info.java",
+	"java.action.filesExplorerPasteAction": "將剪貼簿文字貼到文件中"
 }

src/commands.ts

@@ -191,6 +191,10 @@ export namespace Commands {
      * Custom paste action (triggers auto-import)
      */
     export const CLIPBOARD_ONPASTE = 'java.action.clipboardPasteAction';
+    /**
+     * Custom paste action in files explorer
+     */
+     export const FILESEXPLORER_ONPASTE = 'java.action.filesExplorerPasteAction';
     /**
      * Choose type to import.
      */
@@ -341,4 +345,9 @@ export namespace Commands {
     */
     export const SMARTSEMICOLON_DETECTION = "java.edit.smartSemicolonDetection";
 
+    /**
+     * Determine if pasted text is a java file and resolve packages
+     */
+    export const RESOLVE_PASTED_TEXT = "java.project.resolveText";
+
 }

src/extension.ts

@@ -37,6 +37,7 @@ import { TelemetryService } from '@redhat-developer/vscode-redhat-telemetry/lib'
 import { activationProgressNotification } from "./serverTaskPresenter";
 import { loadSupportedJreNames } from './jdkUtils';
 import { BuildFileSelector, PICKED_BUILD_FILES, cleanupProjectPickerCache } from './buildFilesSelector';
+import { pasteFile } from './pasteAction';
 
 const syntaxClient: SyntaxLanguageClient = new SyntaxLanguageClient();
 const standardClient: StandardLanguageClient = new StandardLanguageClient();
@@ -93,6 +94,14 @@ function getHeapDumpFolderFromSettings(): string {
 
 export async function activate(context: ExtensionContext): Promise<ExtensionAPI> {
 	await loadSupportedJreNames(context);
+	context.subscriptions.push(commands.registerCommand(Commands.FILESEXPLORER_ONPASTE, async () => {
+		const originalClipboard = await env.clipboard.readText();
+		// Hack in order to get path to selected folder if applicable (see https://github.com/microsoft/vscode/issues/3553#issuecomment-1098562676)
+		await commands.executeCommand('copyFilePath');
+		const folder = await env.clipboard.readText();
+		await env.clipboard.writeText(originalClipboard);
+		pasteFile(folder);
+	}));
 	context.subscriptions.push(markdownPreviewProvider);
 	context.subscriptions.push(commands.registerCommand(Commands.TEMPLATE_VARIABLES, async () => {
 		markdownPreviewProvider.show(context.asAbsolutePath(path.join('document', `${Commands.TEMPLATE_VARIABLES}.md`)), 'Predefined Variables', "", context);
@@ -650,7 +659,7 @@ function enableJavadocSymbols() {
 	});
 }
 
-function getTempWorkspace() {
+export function getTempWorkspace() {
 	return path.resolve(os.tmpdir(), `vscodesws_${makeRandomHexString(5)}`);
 }
 

src/pasteAction.ts

@@ -1,9 +1,11 @@
 'use strict';
 
-import { commands, env, ExtensionContext, Range, TextEditor, window } from 'vscode';
+import { TextEncoder } from 'util';
+import { commands, env, ExtensionContext, Range, TextEditor, Uri, window, workspace } from 'vscode';
 import { LanguageClient } from 'vscode-languageclient/node';
-
+import { apiManager } from './apiManager';
 import { Commands } from './commands';
+import fs = require('fs');
 
 export function registerCommands(languageClient: LanguageClient, context: ExtensionContext) {
 	context.subscriptions.push(commands.registerCommand(Commands.CLIPBOARD_ONPASTE, () => {
@@ -48,4 +50,32 @@ export async function registerOrganizeImportsOnPasteCommand(): Promise<void> {
 			}
 		}
 	});
+}
+
+let serverReady = false;
+
+export async function pasteFile(folder: fs.PathLike): Promise<void>  {
+	const clipboardText: string = await env.clipboard.readText();
+	let filePath = folder.toString();
+	fs.stat(folder, async (err, stats) => {
+		// If given path to selected folder is invalid (no folder is selected)
+		if (filePath === clipboardText || stats.isFile() || (filePath === "." && workspace.workspaceFolders !== undefined)) {
+			filePath = workspace.workspaceFolders[0].uri.fsPath;
+		}
+		if (!serverReady) {
+			await apiManager.getApiInstance().serverReady().then( async () => {
+				serverReady = true;
+			});
+		}
+		const fileString: string = await commands.executeCommand(Commands.EXECUTE_WORKSPACE_COMMAND, Commands.RESOLVE_PASTED_TEXT, filePath, clipboardText);
+		const fileUri = fileString !== null ? Uri.file(fileString) : null;
+		if (fileUri !== null){
+			try {
+				await workspace.fs.writeFile(fileUri, new TextEncoder().encode(clipboardText));
+				window.showTextDocument(fileUri, { preview: false });
+			} catch (error: unknown) {
+				// Do nothing (file does not have write permissions)
+			}
+		}
+	});
 }

test/lightweight-mode-suite/extension.test.ts

@@ -25,6 +25,7 @@ suite('Java Language Extension - LightWeight', () => {
 				Commands.OPEN_FILE,
 				Commands.CLEAN_SHARED_INDEXES,
 				Commands.RESTART_LANGUAGE_SERVER,
+				Commands.FILESEXPLORER_ONPASTE
 			].sort();
 			const foundJavaCommands = commands.filter((value) => {
 				return JAVA_COMMANDS.indexOf(value)>=0 || value.startsWith('java.');

test/standard-mode-suite/extension.test.ts

@@ -118,6 +118,8 @@ suite('Java Language Extension - Standard', () => {
 				Commands.UPDATE_SOURCE_ATTACHMENT_CMD,
 				Commands.SMARTSEMICOLON_DETECTION,
 				Commands.RESOLVE_SOURCE_ATTACHMENT,
+				Commands.FILESEXPLORER_ONPASTE,
+				Commands.RESOLVE_PASTED_TEXT,
 			].sort();
 			const foundJavaCommands = commands.filter((value) => {
 				return JAVA_COMMANDS.indexOf(value)>=0 || value.startsWith('java.');