[debug] fix #5768: exception breakpoints support

Signed-off-by: Anton Kosyakov <anton.kosyakov@typefox.io>

packages/debug/src/browser/breakpoint/breakpoint-manager.ts

@@ -20,7 +20,7 @@ import { StorageService } from '@theia/core/lib/browser';
 import { Marker } from '@theia/markers/lib/common/marker';
 import { MarkerManager } from '@theia/markers/lib/browser/marker-manager';
 import URI from '@theia/core/lib/common/uri';
-import { SourceBreakpoint, BREAKPOINT_KIND } from './breakpoint-marker';
+import { SourceBreakpoint, BREAKPOINT_KIND, ExceptionBreakpoint } from './breakpoint-marker';
 
 export interface BreakpointsChangeEvent {
     uri: URI
@@ -32,6 +32,8 @@ export interface BreakpointsChangeEvent {
 @injectable()
 export class BreakpointManager extends MarkerManager<SourceBreakpoint> {
 
+    static EXCEPTION_URI = new URI('debug:exception://');
+
     protected readonly owner = 'breakpoint';
 
     @inject(StorageService)
@@ -126,22 +128,58 @@ export class BreakpointManager extends MarkerManager<SourceBreakpoint> {
         }
     }
 
+    protected readonly exceptionBreakpoints = new Map<string, ExceptionBreakpoint>();
+
+    getExceptionBreakpoint(filter: string): ExceptionBreakpoint | undefined {
+        return this.exceptionBreakpoints.get(filter);
+    }
+
+    getExceptionBreakpoints(): IterableIterator<ExceptionBreakpoint> {
+        return this.exceptionBreakpoints.values();
+    }
+
+    setExceptionBreakpoints(exceptionBreakpoints: ExceptionBreakpoint[]): void {
+        const toRemove = new Set(this.exceptionBreakpoints.keys());
+        for (const exceptionBreakpoint of exceptionBreakpoints) {
+            const filter = exceptionBreakpoint.raw.filter;
+            toRemove.delete(filter);
+            this.exceptionBreakpoints.set(filter, exceptionBreakpoint);
+        }
+        for (const filter of toRemove) {
+            this.exceptionBreakpoints.delete(filter);
+        }
+        if (toRemove.size || exceptionBreakpoints.length) {
+            this.fireOnDidChangeMarkers(BreakpointManager.EXCEPTION_URI);
+        }
+    }
+
+    toggleExceptionBreakpoint(filter: string): void {
+        const breakpoint = this.getExceptionBreakpoint(filter);
+        if (breakpoint) {
+            breakpoint.enabled = !breakpoint.enabled;
+            this.fireOnDidChangeMarkers(BreakpointManager.EXCEPTION_URI);
+        }
+    }
+
     async load(): Promise<void> {
         const data = await this.storage.getData<BreakpointManager.Data>('breakpoints', {
             breakpointsEnabled: true,
-            breakpoints: {}
+            breakpoints: {},
+            exceptionBreakpoints: []
         });
         this._breakpointsEnabled = data.breakpointsEnabled;
         // tslint:disable-next-line:forin
         for (const uri in data.breakpoints) {
             this.setBreakpoints(new URI(uri), data.breakpoints[uri]);
         }
+        this.setExceptionBreakpoints(data.exceptionBreakpoints);
     }
 
     save(): void {
         const data: BreakpointManager.Data = {
             breakpointsEnabled: this._breakpointsEnabled,
-            breakpoints: {}
+            breakpoints: {},
+            exceptionBreakpoints: [...this.exceptionBreakpoints.values()]
         };
         const uris = this.getUris();
         for (const uri of uris) {
@@ -157,5 +195,6 @@ export namespace BreakpointManager {
         breakpoints: {
             [uri: string]: SourceBreakpoint[]
         }
+        exceptionBreakpoints: ExceptionBreakpoint[]
     }
 }

packages/debug/src/browser/breakpoint/breakpoint-marker.ts

@@ -25,7 +25,7 @@ export interface SourceBreakpoint {
     id: string;
     uri: string;
     enabled: boolean;
-    raw: DebugProtocol.SourceBreakpoint
+    raw: DebugProtocol.SourceBreakpoint;
 }
 export namespace SourceBreakpoint {
     export function create(uri: URI, data: DebugProtocol.SourceBreakpoint, origin?: SourceBreakpoint): SourceBreakpoint {
@@ -49,3 +49,19 @@ export namespace BreakpointMarker {
         return 'kind' in node && node.kind === BREAKPOINT_KIND;
     }
 }
+
+export interface ExceptionBreakpoint {
+    enabled: boolean;
+    raw: DebugProtocol.ExceptionBreakpointsFilter;
+}
+export namespace ExceptionBreakpoint {
+    export function create(data: DebugProtocol.ExceptionBreakpointsFilter, origin?: ExceptionBreakpoint): ExceptionBreakpoint {
+        return {
+            enabled: origin ? origin.enabled : false,
+            raw: {
+                ...(origin && origin.raw),
+                ...data
+            }
+        };
+    }
+}

packages/debug/src/browser/debug-session.tsx

@@ -34,7 +34,7 @@ import URI from '@theia/core/lib/common/uri';
 import { BreakpointManager } from './breakpoint/breakpoint-manager';
 import { DebugSessionOptions, InternalDebugSessionOptions } from './debug-session-options';
 import { DebugConfiguration } from '../common/debug-common';
-import { SourceBreakpoint } from './breakpoint/breakpoint-marker';
+import { SourceBreakpoint, ExceptionBreakpoint } from './breakpoint/breakpoint-marker';
 import { FileSystem } from '@theia/filesystem/lib/common';
 import { TerminalWidgetOptions } from '@theia/terminal/lib/browser/base/terminal-widget';
 
@@ -282,6 +282,15 @@ export class DebugSession implements CompositeTreeElement {
     protected initialized = false;
     protected async configure(): Promise<void> {
         await this.updateBreakpoints({ sourceModified: false });
+        if (this.capabilities.exceptionBreakpointFilters) {
+            const exceptionBreakpoints = [];
+            for (const filter of this.capabilities.exceptionBreakpointFilters) {
+                const origin = this.breakpoints.getExceptionBreakpoint(filter.filter);
+                exceptionBreakpoints.push(ExceptionBreakpoint.create(filter, origin));
+            }
+            this.breakpoints.setExceptionBreakpoints(exceptionBreakpoints);
+        }
+        await this.updateBreakpoints({ uri: BreakpointManager.EXCEPTION_URI, sourceModified: false });
         if (this.capabilities.supportsConfigurationDoneRequest) {
             await this.sendRequest('configurationDone', {});
         }
@@ -529,6 +538,16 @@ export class DebugSession implements CompositeTreeElement {
             return;
         }
         const { uri, sourceModified } = options;
+        if (uri && uri.toString() === BreakpointManager.EXCEPTION_URI.toString()) {
+            const filters = [];
+            for (const breakpoint of this.breakpoints.getExceptionBreakpoints()) {
+                if (breakpoint.enabled) {
+                    filters.push(breakpoint.raw.filter);
+                }
+            }
+            await this.sendRequest('setExceptionBreakpoints', { filters });
+            return;
+        }
         for (const affectedUri of this.getAffectedUris(uri)) {
             const source = await this.toSource(affectedUri);
             const all = this.breakpoints.findMarkers({ uri: affectedUri }).map(({ data }) =>

packages/debug/src/browser/editor/debug-editor-model.ts

@@ -26,6 +26,7 @@ import { SourceBreakpoint } from '../breakpoint/breakpoint-marker';
 import { DebugEditor } from './debug-editor';
 import { DebugHoverWidget, createDebugHoverWidgetContainer } from './debug-hover-widget';
 import { DebugBreakpointWidget } from './debug-breakpoint-widget';
+import { DebugExceptionWidget } from './debug-exception-widget';
 
 export const DebugEditorModelFactory = Symbol('DebugEditorModelFactory');
 export type DebugEditorModelFactory = (editor: DebugEditor) => DebugEditorModel;
@@ -37,6 +38,7 @@ export class DebugEditorModel implements Disposable {
         const child = createDebugHoverWidgetContainer(parent, editor);
         child.bind(DebugEditorModel).toSelf();
         child.bind(DebugBreakpointWidget).toSelf();
+        child.bind(DebugExceptionWidget).toSelf();
         return child;
     }
     static createModel(parent: interfaces.Container, editor: DebugEditor): DebugEditorModel {
@@ -77,12 +79,16 @@ export class DebugEditorModel implements Disposable {
     @inject(DebugBreakpointWidget)
     readonly breakpointWidget: DebugBreakpointWidget;
 
+    @inject(DebugExceptionWidget)
+    readonly exceptionWidget: DebugExceptionWidget;
+
     @postConstruct()
     protected init(): void {
         this.uri = new URI(this.editor.getControl().getModel().uri.toString());
         this.toDispose.pushAll([
             this.hover,
             this.breakpointWidget,
+            this.exceptionWidget,
             this.editor.getControl().onMouseDown(event => this.handleMouseDown(event)),
             this.editor.getControl().onMouseMove(event => this.handleMouseMove(event)),
             this.editor.getControl().onMouseLeave(event => this.handleMouseLeave(event)),
@@ -99,6 +105,7 @@ export class DebugEditorModel implements Disposable {
     }
 
     protected readonly renderFrames = debounce(() => {
+        this.toggleExceptionWidget();
         const decorations = this.createFrameDecorations();
         this.frameDecorations = this.deltaDecorations(this.frameDecorations, decorations);
     }, 100);
@@ -150,6 +157,26 @@ export class DebugEditorModel implements Disposable {
         return decorations;
     }
 
+    protected async toggleExceptionWidget(): Promise<void> {
+        const { currentFrame } = this.sessions;
+        if (!currentFrame ||
+            !currentFrame.source || currentFrame.source.uri.toString() !== this.uri.toString() ||
+            !currentFrame.raw.line || !currentFrame.raw.column) {
+            this.exceptionWidget.hide();
+            return;
+        }
+        const info = await currentFrame.thread.getExceptionInfo();
+        if (!info) {
+            this.exceptionWidget.hide();
+            return;
+        }
+        this.exceptionWidget.show({
+            info,
+            lineNumber: currentFrame.raw.line,
+            column: currentFrame.raw.column
+        });
+    }
+
     render(): void {
         this.renderBreakpoints();
         this.renderCurrentBreakpoints();

packages/debug/src/browser/editor/debug-exception-widget.tsx

@@ -0,0 +1,82 @@
+/********************************************************************************
+ * Copyright (C) 2019 TypeFox 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 * as React from 'react';
+import * as ReactDOM from 'react-dom';
+import { injectable, inject, postConstruct } from 'inversify';
+import { Disposable, DisposableCollection } from '@theia/core/lib/common/disposable';
+import { MonacoEditorZoneWidget } from '@theia/monaco/lib/browser/monaco-editor-zone-widget';
+import { DebugEditor } from './debug-editor';
+import { DebugExceptionInfo } from '../model/debug-thread';
+
+export interface ShowDebugExceptionParams {
+    info: DebugExceptionInfo
+    lineNumber: number
+    column: number
+}
+
+@injectable()
+export class DebugExceptionWidget implements Disposable {
+
+    @inject(DebugEditor)
+    readonly editor: DebugEditor;
+
+    protected zone: MonacoEditorZoneWidget;
+
+    protected readonly toDispose = new DisposableCollection();
+
+    @postConstruct()
+    protected async init(): Promise<void> {
+        this.toDispose.push(this.zone = new MonacoEditorZoneWidget(this.editor.getControl()));
+        this.zone.containerNode.classList.add('theia-debug-exception-widget');
+        this.toDispose.push(Disposable.create(() => ReactDOM.unmountComponentAtNode(this.zone.containerNode)));
+    }
+
+    dispose(): void {
+        this.toDispose.dispose();
+    }
+
+    show({ info, lineNumber, column }: ShowDebugExceptionParams): void {
+        this.render(info);
+
+        const fontInfo = this.editor.getControl().getConfiguration().fontInfo;
+        this.zone.containerNode.style.fontSize = `${fontInfo.fontSize}px`;
+        this.zone.containerNode.style.lineHeight = `${fontInfo.lineHeight}px`;
+
+        const afterLineNumber = lineNumber;
+        const afterColumn = column;
+        const heightInLines = 0;
+        this.zone.show({ showFrame: true, afterLineNumber, afterColumn, heightInLines, frameWidth: 1 });
+    }
+
+    hide(): void {
+        this.zone.hide();
+    }
+
+    protected render(info: DebugExceptionInfo): void {
+        const stackTrace = info.details && info.details.stackTrace;
+        ReactDOM.render(<React.Fragment>
+            <div className='title'>{info.id ? `Exception has occurred: ${info.id}` : 'Exception has occurred.'}</div>
+            {info.description && <div className='description'>{info.description}</div>}
+            {stackTrace && <div className='stack-trace'>{stackTrace}</div>}
+        </React.Fragment>, this.zone.containerNode, () => {
+            const lineHeight = this.editor.getControl().getConfiguration().lineHeight;
+            const heightInLines = Math.ceil(this.zone.containerNode.offsetHeight / lineHeight);
+            this.zone.layout(heightInLines);
+        });
+    }
+
+}

packages/debug/src/browser/model/debug-thread.tsx

@@ -31,6 +31,12 @@ export class DebugThreadData {
     readonly stoppedDetails: StoppedDetails | undefined;
 }
 
+export interface DebugExceptionInfo {
+    id?: string
+    description?: string
+    details?: DebugProtocol.ExceptionDetails
+}
+
 export class DebugThread extends DebugThreadData implements TreeElement {
 
     protected readonly onDidChangedEmitter = new Emitter<void>();
@@ -93,6 +99,23 @@ export class DebugThread extends DebugThreadData implements TreeElement {
         return this.session.sendRequest('pause', this.toArgs());
     }
 
+    async getExceptionInfo(): Promise<DebugExceptionInfo | undefined> {
+        if (this.stoppedDetails && this.stoppedDetails.reason === 'exception') {
+            if (this.session.capabilities.supportsExceptionInfoRequest) {
+                const response = await this.session.sendRequest('exceptionInfo', this.toArgs());
+                return {
+                    id: response.body.exceptionId,
+                    description: response.body.description,
+                    details: response.body.details
+                };
+            }
+            return {
+                description: this.stoppedDetails.text
+            };
+        }
+        return undefined;
+    }
+
     get supportsTerminate(): boolean {
         return !!this.session.capabilities.supportsTerminateThreadsRequest;
     }

packages/debug/src/browser/style/debug-bright.useable.css

@@ -10,4 +10,6 @@
     --theia-debug-configure: url('configure.svg');
     --theia-debug-repl: url('repl.svg');
     --breakpoints-activate-url: url('breakpoints-activate.svg');
+    --theia-debug-exception-widget-border-color: #a31515;
+    --theia-debug-exception-widget-background-color: #f1dfde;
 }

packages/debug/src/browser/style/debug-dark.useable.css

@@ -10,4 +10,6 @@
     --theia-debug-configure: url('configure-inverse.svg');
     --theia-debug-repl: url('repl-inverse.svg');
     --breakpoints-activate-url: url('breakpoints-activate-inverse.svg');
+    --theia-debug-exception-widget-border-color: #a31515;
+    --theia-debug-exception-widget-background-color: #420b0d;
 }

packages/debug/src/browser/style/index.css

@@ -360,3 +360,26 @@
 	margin-top: var(--theia-ui-padding);
 	margin-bottom: var(--theia-ui-padding);
 }
+
+/** Exception Widget */
+.monaco-editor .zone-widget .zone-widget-container.theia-debug-exception-widget {
+    color: var(--theia-content-font-color0);
+    font-size: var(--theia-code-font-size);
+    line-height: var(--theia-code-line-height);
+    font-family: var(--theia-code-font-family);
+    border-top-color: var(--theia-debug-exception-widget-border-color);
+    border-bottom-color: var(--theia-debug-exception-widget-border-color);
+    background-color: var(--theia-debug-exception-widget-background-color);
+    padding: var(--theia-ui-padding) calc(var(--theia-ui-padding)*1.5);
+	white-space: pre-wrap;
+	user-select: text;
+    overflow: hidden;
+}
+
+.theia-debug-exception-widget .title {
+	font-weight: bold;
+}
+
+.theia-debug-exception-widget .stack-trace {
+	margin-top: 0.5em;
+}