plugin: Support LogOutputChannel

- Support LogOutputChannel - Support LogLevel - Support in namespace/env: logLevel & onDidChangeLogLevel - Remark: Needs further extension of application to fully support all aspects of a LogOutputViewChannel (i.e. developer logger service, logging to file, extension of output view UI) Resolves #12017 Contributed on behalf of STMicroelectronics. Signed-off-by: Nina Doschek <ndoschek@eclipsesource.com>
eclipse-theia · Apr 18, 2023 · 17b615c · 17b615c
1 parent 1334898
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diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -3,7 +3,10 @@
 ## History
 
 - [Previous Changelogs](https://github.com/eclipse-theia/theia/tree/master/doc/changelogs/)
-## v1.37.0 0 -
+
+## v1.37.0 -
+
+- [plugin] implemented the VS Code `LogOutputChannel` API [#12017](https://github.com/eclipse-theia/theia/pull/12429)
 
 <a name="breaking_changes_1.37.0">[Breaking Changes:](#breaking_changes_1.37.0)</a>
 - [core] Inject core preference into `DockPanelRenderer` constructor [12360](https://github.com/eclipse-theia/theia/pull/12360)

diff --git a/packages/plugin-ext/src/common/plugin-api-rpc.ts b/packages/plugin-ext/src/common/plugin-api-rpc.ts
@@ -286,7 +286,8 @@ export interface TerminalServiceExt {
     getEnvironmentVariableCollection(extensionIdentifier: string): theia.EnvironmentVariableCollection;
 }
 export interface OutputChannelRegistryExt {
-    createOutputChannel(name: string, pluginInfo: PluginInfo): theia.OutputChannel
+    createOutputChannel(name: string, pluginInfo: PluginInfo): theia.OutputChannel,
+    createOutputChannel(name: string, pluginInfo: PluginInfo, options?: { log: true }): theia.LogOutputChannel
 }
 
 export interface ConnectionMain {

diff --git a/packages/plugin-ext/src/plugin/output-channel-registry.ts b/packages/plugin-ext/src/plugin/output-channel-registry.ts
@@ -13,27 +13,39 @@
 //
 // SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
 // *****************************************************************************
-import {
-    PLUGIN_RPC_CONTEXT as Ext, OutputChannelRegistryMain, PluginInfo, OutputChannelRegistryExt
-} from '../common/plugin-api-rpc';
-import { RPCProtocol } from '../common/rpc-protocol';
+
 import * as theia from '@theia/plugin';
+import { PLUGIN_RPC_CONTEXT as Ext, OutputChannelRegistryExt, OutputChannelRegistryMain, PluginInfo } from '../common/plugin-api-rpc';
+import { RPCProtocol } from '../common/rpc-protocol';
+import { LogOutputChannelImpl } from './output-channel/logoutput-channel';
 import { OutputChannelImpl } from './output-channel/output-channel-item';
 
 export class OutputChannelRegistryExtImpl implements OutputChannelRegistryExt {
 
-    proxy: OutputChannelRegistryMain;
+    private proxy: OutputChannelRegistryMain;
 
     constructor(rpc: RPCProtocol) {
         this.proxy = rpc.getProxy(Ext.OUTPUT_CHANNEL_REGISTRY_MAIN);
     }
 
-    createOutputChannel(name: string, pluginInfo: PluginInfo): theia.OutputChannel {
+    createOutputChannel(name: string, pluginInfo: PluginInfo): theia.OutputChannel;
+    createOutputChannel(name: string, pluginInfo: PluginInfo, options?: { log: true; }): theia.LogOutputChannel;
+    createOutputChannel(name: string, pluginInfo: PluginInfo, options?: { log: true; }): theia.OutputChannel | theia.LogOutputChannel {
         name = name.trim();
         if (!name) {
             throw new Error('illegal argument \'name\'. must not be falsy');
-        } else {
-            return new OutputChannelImpl(name, this.proxy, pluginInfo);
         }
+        const isLogOutput = options && typeof options === 'object' && options.log;
+        return isLogOutput
+            ? this.doCreateLogOutputChannel(name, pluginInfo)
+            : this.doCreateOutputChannel(name, pluginInfo);
+    }
+
+    private doCreateOutputChannel(name: string, pluginInfo: PluginInfo): OutputChannelImpl {
+        return new OutputChannelImpl(name, this.proxy, pluginInfo);
+    }
+
+    private doCreateLogOutputChannel(name: string, pluginInfo: PluginInfo): LogOutputChannelImpl {
+        return new LogOutputChannelImpl(name, this.proxy, pluginInfo);
     }
 }
diff --git a/packages/plugin-ext/src/plugin/output-channel/logoutput-channel.ts b/packages/plugin-ext/src/plugin/output-channel/logoutput-channel.ts
@@ -0,0 +1,80 @@
+// *****************************************************************************
+// Copyright (C) 2023 STMicroelectronics and others.
+//
+// This program and the accompanying materials are made available under the
+// terms of the Eclipse Public License v. 2.0 which is available at
+// http://www.eclipse.org/legal/epl-2.0.
+//
+// This Source Code may also be made available under the following Secondary
+// Licenses when the conditions for such availability set forth in the Eclipse
+// Public License v. 2.0 are satisfied: GNU General Public License, version 2
+// with the GNU Classpath Exception which is available at
+// https://www.gnu.org/software/classpath/license.html.
+//
+// SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
+// *****************************************************************************
+
+import { AbstractMessageLogger, DEFAULT_LOG_LEVEL, LogLevel } from '@theia/monaco-editor-core/esm/vs/platform/log/common/log';
+import * as theia from '@theia/plugin';
+
+import { OutputChannelRegistryMain, PluginInfo } from '../../common/plugin-api-rpc';
+import { toLogLevel } from '../type-converters';
+
+export class LogOutputChannelImpl extends AbstractMessageLogger implements theia.LogOutputChannel {
+
+    private _disposed: boolean = false;
+    get disposed(): boolean { return this._disposed; }
+
+    override onDidChangeLogLevel: theia.Event<theia.LogLevel>;
+
+    constructor(readonly name: string, protected proxy: OutputChannelRegistryMain, protected readonly pluginInfo: PluginInfo) {
+        super();
+        this.setLevel(DEFAULT_LOG_LEVEL);
+    }
+
+    get logLevel(): theia.LogLevel {
+        return toLogLevel(this.getLevel());
+    }
+
+    append(value: string): void {
+        this.info(value);
+    }
+
+    appendLine(value: string): void {
+        this.append(value + '\n');
+    }
+
+    replace(value: string): void {
+        this.info(value);
+        this.proxy.$append(this.name, value, this.pluginInfo);
+    }
+
+    clear(): void {
+        this.proxy.$clear(this.name);
+    }
+
+    show(columnOrPreserveFocus?: theia.ViewColumn | boolean, preserveFocus?: boolean): void {
+        this.proxy.$reveal(this.name, !!(typeof columnOrPreserveFocus === 'boolean' ? columnOrPreserveFocus : preserveFocus));
+    }
+
+    hide(): void {
+        this.proxy.$close(this.name);
+    }
+
+    protected log(level: LogLevel, message: string): void {
+        const now = new Date(Date.now());
+        const eol = message.endsWith('\n') ? '' : '\n';
+        const logMessage = `${now.toISOString()} [${LogLevel[level]}] ${message}${eol}`;
+        this.proxy.$append(this.name, logMessage, this.pluginInfo);
+    }
+
+    override dispose(): void {
+        super.dispose();
+
+        if (!this._disposed) {
+            this.proxy.$dispose(this.name);
+            this._disposed = true;
+        }
+    }
+
+}
diff --git a/packages/plugin-ext/src/plugin/plugin-context.ts b/packages/plugin-ext/src/plugin/plugin-context.ts
@@ -481,8 +481,8 @@ export function createAPIFactory(
 
                 return statusBarMessageRegistryExt.createStatusBarItem(alignment, priority, id);
             },
-            createOutputChannel(name: string): theia.OutputChannel {
-                return outputChannelRegistryExt.createOutputChannel(name, pluginToPluginInfo(plugin));
+            createOutputChannel(name: string, options?: { log: true }): any {
+                return outputChannelRegistryExt.createOutputChannel(name, pluginToPluginInfo(plugin), options);
             },
             createWebviewPanel(viewType: string,
                 title: string,

diff --git a/packages/plugin-ext/src/plugin/type-converters.ts b/packages/plugin-ext/src/plugin/type-converters.ts
@@ -29,6 +29,7 @@ import { UriComponents } from '../common/uri-components';
 import { isReadonlyArray } from '../common/arrays';
 import { MarkdownString as MarkdownStringDTO } from '@theia/core/lib/common/markdown-rendering';
 import { isObject } from '@theia/core/lib/common';
+import { LogLevel as MonacoLogLevel } from '@theia/monaco-editor-core/esm/vs/platform/log/common/log';
 
 const SIDE_GROUP = -2;
 const ACTIVE_GROUP = -1;
@@ -1385,3 +1386,16 @@ export namespace DataTransfer {
         return dataTransfer;
     }
 }
+
+export function toLogLevel(logLevel: MonacoLogLevel): theia.LogLevel {
+    switch (logLevel) {
+        case MonacoLogLevel.Trace: return types.LogLevel.Trace;
+        case MonacoLogLevel.Debug: return types.LogLevel.Debug;
+        case MonacoLogLevel.Info: return types.LogLevel.Info;
+        case MonacoLogLevel.Warning: return types.LogLevel.Warning;
+        case MonacoLogLevel.Error: return types.LogLevel.Error;
+        case MonacoLogLevel.Critical: return types.LogLevel.Error /* the plugin API's max LogLevel is Error */;
+        case MonacoLogLevel.Off: return types.LogLevel.Off;
+        default: throw new Error(`Invalid log level ${logLevel}`);
+    }
+}
diff --git a/packages/plugin-ext/src/plugin/types-impl.ts b/packages/plugin-ext/src/plugin/types-impl.ts
@@ -2734,13 +2734,12 @@ export namespace DebugAdapterInlineImplementation {
 export type DebugAdapterDescriptor = DebugAdapterExecutable | DebugAdapterServer | DebugAdapterNamedPipeServer | DebugAdapterInlineImplementation;
 
 export enum LogLevel {
+    Off = 0,
     Trace = 1,
     Debug = 2,
     Info = 3,
     Warning = 4,
-    Error = 5,
-    Critical = 6,
-    Off = 7
+    Error = 5
 }
 
 /**

diff --git a/packages/plugin/src/theia-proposed.d.ts b/packages/plugin/src/theia-proposed.d.ts
@@ -168,35 +168,6 @@ export module '@theia/plugin' {
         color?: ThemeColor;
     }
 
-    // #region LogLevel: https://github.com/microsoft/vscode/issues/85992
-
-    /**
-     * The severity level of a log message
-     */
-    export enum LogLevel {
-        Trace = 1,
-        Debug = 2,
-        Info = 3,
-        Warning = 4,
-        Error = 5,
-        Critical = 6,
-        Off = 7
-    }
-
-    export namespace env {
-        /**
-         * Current logging level.
-         */
-        export const logLevel: LogLevel;
-
-        /**
-         * An [event](#Event) that fires when the log level has changed.
-         */
-        export const onDidChangeLogLevel: Event<LogLevel>;
-    }
-
-    // #endregion
-
     // #region search in workspace
     /**
      * The parameters of a query for text search.

diff --git a/packages/plugin/src/theia.d.ts b/packages/plugin/src/theia.d.ts
@@ -2702,6 +2702,9 @@ export module '@theia/plugin' {
 
     /**
      * An output channel is a container for readonly textual information.
+     *
+     * To get an instance of an `OutputChannel` use
+     * {@link window.createOutputChannel createOutputChannel}.
      */
     export interface OutputChannel {
 
@@ -2765,6 +2768,106 @@ export module '@theia/plugin' {
         dispose(): void;
     }
 
+    /**
+     * Log levels
+     */
+    export enum LogLevel {
+
+        /**
+         * No messages are logged with this level.
+         */
+        Off = 0,
+
+        /**
+         * All messages are logged with this level.
+         */
+        Trace = 1,
+
+        /**
+         * Messages with debug and higher log level are logged with this level.
+         */
+        Debug = 2,
+
+        /**
+         * Messages with info and higher log level are logged with this level.
+         */
+        Info = 3,
+
+        /**
+         * Messages with warning and higher log level are logged with this level.
+         */
+        Warning = 4,
+
+        /**
+         * Only error messages are logged with this level.
+         */
+        Error = 5
+    }
+
+    /**
+     * A channel for containing log output.
+     *
+     * To get an instance of a `LogOutputChannel` use
+     * {@link window.createOutputChannel createOutputChannel}.
+     */
+    export interface LogOutputChannel extends OutputChannel {
+
+        /**
+         * The current log level of the channel. Defaults to {@link env.logLevel editor log level}.
+         */
+        readonly logLevel: LogLevel;
+
+        /**
+         * An {@link Event} which fires when the log level of the channel changes.
+         */
+        readonly onDidChangeLogLevel: Event<LogLevel>;
+
+        /**
+         * Outputs the given trace message to the channel. Use this method to log verbose information.
+         *
+         * The message is only loggeed if the channel is configured to display {@link LogLevel.Trace trace} log level.
+         *
+         * @param message trace message to log
+         */
+        trace(message: string, ...args: any[]): void;
+
+        /**
+         * Outputs the given debug message to the channel.
+         *
+         * The message is only loggeed if the channel is configured to display {@link LogLevel.Debug debug} log level or lower.
+         *
+         * @param message debug message to log
+         */
+        debug(message: string, ...args: any[]): void;
+
+        /**
+         * Outputs the given information message to the channel.
+         *
+         * The message is only loggeed if the channel is configured to display {@link LogLevel.Info info} log level or lower.
+         *
+         * @param message info message to log
+         */
+        info(message: string, ...args: any[]): void;
+
+        /**
+         * Outputs the given warning message to the channel.
+         *
+         * The message is only loggeed if the channel is configured to display {@link LogLevel.Warning warning} log level or lower.
+         *
+         * @param message warning message to log
+         */
+        warn(message: string, ...args: any[]): void;
+
+        /**
+         * Outputs the given error or error message to the channel.
+         *
+         * The message is only loggeed if the channel is configured to display {@link LogLevel.Error error} log level or lower.
+         *
+         * @param error Error or error message to log
+         */
+        error(error: string | Error, ...args: any[]): void;
+    }
+
     /**
      * Options to configure the behaviour of a file open dialog.
      *
@@ -5250,6 +5353,15 @@ export module '@theia/plugin' {
          */
         export function createOutputChannel(name: string): OutputChannel;
 
+        /**
+         * Creates a new {@link OutputChannel output channel} with the given name.
+         * If options are given, creates a new {@link OutputChannel output channel} with the given name.
+         *
+         * @param name Human-readable string which will be used to represent the channel in the UI.
+         * @param options optional; Options for the log output channel.
+         */
+        export function createOutputChannel(name: string, options?: { log: true }): LogOutputChannel;
+
         /**
          * Create new terminal.
          * @param name - terminal name to display on the UI.
@@ -7527,6 +7639,15 @@ export module '@theia/plugin' {
          */
         export function asExternalUri(target: Uri): Thenable<Uri>;
 
+        /**
+         * The current log level of the editor.
+         */
+        export const logLevel: LogLevel;
+
+        /**
+         * An {@link Event} which fires when the log level of the editor changes.
+         */
+        export const onDidChangeLogLevel: Event<LogLevel>;
     }
 
     /**