Files
azuredatastudio/src/vs/workbench/contrib/debug/browser/callStackView.ts

700 lines
25 KiB
TypeScript

/*---------------------------------------------------------------------------------------------
* Copyright (c) Microsoft Corporation. All rights reserved.
* Licensed under the Source EULA. See License.txt in the project root for license information.
*--------------------------------------------------------------------------------------------*/
import * as nls from 'vs/nls';
import { RunOnceScheduler, ignoreErrors, sequence } from 'vs/base/common/async';
import * as dom from 'vs/base/browser/dom';
import { IViewletViewOptions } from 'vs/workbench/browser/parts/views/viewsViewlet';
import { IDebugService, State, IStackFrame, IDebugSession, IThread, CONTEXT_CALLSTACK_ITEM_TYPE, IDebugModel } from 'vs/workbench/contrib/debug/common/debug';
import { Thread, StackFrame, ThreadAndSessionIds } from 'vs/workbench/contrib/debug/common/debugModel';
import { IContextMenuService } from 'vs/platform/contextview/browser/contextView';
import { IInstantiationService } from 'vs/platform/instantiation/common/instantiation';
import { MenuId, IMenu, IMenuService } from 'vs/platform/actions/common/actions';
import { IKeybindingService } from 'vs/platform/keybinding/common/keybinding';
import { renderViewTree } from 'vs/workbench/contrib/debug/browser/baseDebugView';
import { IAction } from 'vs/base/common/actions';
import { IEditorService } from 'vs/workbench/services/editor/common/editorService';
import { IConfigurationService } from 'vs/platform/configuration/common/configuration';
import { IContextKey, IContextKeyService } from 'vs/platform/contextkey/common/contextkey';
import { IViewletPanelOptions, ViewletPanel } from 'vs/workbench/browser/parts/views/panelViewlet';
import { ILabelService } from 'vs/platform/label/common/label';
import { IAccessibilityProvider } from 'vs/base/browser/ui/list/listWidget';
import { fillInContextMenuActions } from 'vs/platform/actions/browser/menuEntryActionViewItem';
import { IListVirtualDelegate } from 'vs/base/browser/ui/list/list';
import { ITreeRenderer, ITreeNode, ITreeContextMenuEvent, IAsyncDataSource } from 'vs/base/browser/ui/tree/tree';
import { TreeResourceNavigator2, WorkbenchAsyncDataTree } from 'vs/platform/list/browser/listService';
import { onUnexpectedError } from 'vs/base/common/errors';
import { HighlightedLabel } from 'vs/base/browser/ui/highlightedlabel/highlightedLabel';
import { createMatches, FuzzyScore } from 'vs/base/common/filters';
import { Event } from 'vs/base/common/event';
const $ = dom.$;
type CallStackItem = IStackFrame | IThread | IDebugSession | string | ThreadAndSessionIds | IStackFrame[];
export class CallStackView extends ViewletPanel {
private pauseMessage: HTMLSpanElement;
private pauseMessageLabel: HTMLSpanElement;
private onCallStackChangeScheduler: RunOnceScheduler;
private needsRefresh: boolean;
private ignoreSelectionChangedEvent: boolean;
private ignoreFocusStackFrameEvent: boolean;
private callStackItemType: IContextKey<string>;
private dataSource: CallStackDataSource;
private tree: WorkbenchAsyncDataTree<CallStackItem | IDebugModel, CallStackItem, FuzzyScore>;
private contributedContextMenu: IMenu;
private parentSessionToExpand = new Set<IDebugSession>();
constructor(
private options: IViewletViewOptions,
@IContextMenuService contextMenuService: IContextMenuService,
@IDebugService private readonly debugService: IDebugService,
@IKeybindingService keybindingService: IKeybindingService,
@IInstantiationService private readonly instantiationService: IInstantiationService,
@IEditorService private readonly editorService: IEditorService,
@IConfigurationService configurationService: IConfigurationService,
@IMenuService menuService: IMenuService,
@IContextKeyService readonly contextKeyService: IContextKeyService,
) {
super({ ...(options as IViewletPanelOptions), ariaHeaderLabel: nls.localize('callstackSection', "Call Stack Section") }, keybindingService, contextMenuService, configurationService);
this.callStackItemType = CONTEXT_CALLSTACK_ITEM_TYPE.bindTo(contextKeyService);
this.contributedContextMenu = menuService.createMenu(MenuId.DebugCallStackContext, contextKeyService);
this.disposables.push(this.contributedContextMenu);
// Create scheduler to prevent unnecessary flashing of tree when reacting to changes
this.onCallStackChangeScheduler = new RunOnceScheduler(() => {
// Only show the global pause message if we do not display threads.
// Otherwise there will be a pause message per thread and there is no need for a global one.
const sessions = this.debugService.getModel().getSessions();
const thread = sessions.length === 1 && sessions[0].getAllThreads().length === 1 ? sessions[0].getAllThreads()[0] : undefined;
if (thread && thread.stoppedDetails) {
this.pauseMessageLabel.textContent = thread.stoppedDetails.description || nls.localize('debugStopped', "Paused on {0}", thread.stoppedDetails.reason || '');
this.pauseMessageLabel.title = thread.stoppedDetails.text || '';
dom.toggleClass(this.pauseMessageLabel, 'exception', thread.stoppedDetails.reason === 'exception');
this.pauseMessage.hidden = false;
} else {
this.pauseMessage.hidden = true;
}
this.needsRefresh = false;
this.dataSource.deemphasizedStackFramesToShow = [];
this.tree.updateChildren().then(() => {
this.parentSessionToExpand.forEach(s => this.tree.expand(s));
this.parentSessionToExpand.clear();
this.updateTreeSelection();
});
}, 50);
}
protected renderHeaderTitle(container: HTMLElement): void {
const titleContainer = dom.append(container, $('.debug-call-stack-title'));
super.renderHeaderTitle(titleContainer, this.options.title);
this.pauseMessage = dom.append(titleContainer, $('span.pause-message'));
this.pauseMessage.hidden = true;
this.pauseMessageLabel = dom.append(this.pauseMessage, $('span.label'));
}
renderBody(container: HTMLElement): void {
dom.addClass(container, 'debug-call-stack');
const treeContainer = renderViewTree(container);
this.dataSource = new CallStackDataSource(this.debugService);
this.tree = this.instantiationService.createInstance(WorkbenchAsyncDataTree, treeContainer, new CallStackDelegate(), [
new SessionsRenderer(),
new ThreadsRenderer(),
this.instantiationService.createInstance(StackFramesRenderer),
new ErrorsRenderer(),
new LoadMoreRenderer(),
new ShowMoreRenderer()
], this.dataSource, {
accessibilityProvider: new CallStackAccessibilityProvider(),
ariaLabel: nls.localize({ comment: ['Debug is a noun in this context, not a verb.'], key: 'callStackAriaLabel' }, "Debug Call Stack"),
identityProvider: {
getId: (element: CallStackItem) => {
if (typeof element === 'string') {
return element;
}
if (element instanceof Array) {
return `showMore ${element[0].getId()}`;
}
return element.getId();
}
},
keyboardNavigationLabelProvider: {
getKeyboardNavigationLabel: (e: CallStackItem) => {
if (isDebugSession(e)) {
return e.getLabel();
}
if (e instanceof Thread) {
return `${e.name} ${e.stateLabel}`;
}
if (e instanceof StackFrame || typeof e === 'string') {
return e;
}
if (e instanceof ThreadAndSessionIds) {
return LoadMoreRenderer.LABEL;
}
return nls.localize('showMoreStackFrames2', "Show More Stack Frames");
}
}
}) as WorkbenchAsyncDataTree<CallStackItem | IDebugModel, CallStackItem, FuzzyScore>;
this.tree.setInput(this.debugService.getModel()).then(undefined, onUnexpectedError);
const callstackNavigator = new TreeResourceNavigator2(this.tree);
this.disposables.push(callstackNavigator);
this.disposables.push(callstackNavigator.onDidOpenResource(e => {
if (this.ignoreSelectionChangedEvent) {
return;
}
const focusStackFrame = (stackFrame: IStackFrame | undefined, thread: IThread | undefined, session: IDebugSession) => {
this.ignoreFocusStackFrameEvent = true;
try {
this.debugService.focusStackFrame(stackFrame, thread, session, true);
} finally {
this.ignoreFocusStackFrameEvent = false;
}
};
const element = e.element;
if (element instanceof StackFrame) {
focusStackFrame(element, element.thread, element.thread.session);
element.openInEditor(this.editorService, e.editorOptions.preserveFocus, e.sideBySide, e.editorOptions.pinned);
}
if (element instanceof Thread) {
focusStackFrame(undefined, element, element.session);
}
if (isDebugSession(element)) {
focusStackFrame(undefined, undefined, element);
}
if (element instanceof ThreadAndSessionIds) {
const session = this.debugService.getModel().getSession(element.sessionId);
const thread = session && session.getThread(element.threadId);
if (thread) {
(<Thread>thread).fetchCallStack()
.then(() => this.tree.updateChildren());
}
}
if (element instanceof Array) {
this.dataSource.deemphasizedStackFramesToShow.push(...element);
this.tree.updateChildren();
}
}));
this.disposables.push(this.debugService.getModel().onDidChangeCallStack(() => {
if (!this.isBodyVisible()) {
this.needsRefresh = true;
return;
}
if (!this.onCallStackChangeScheduler.isScheduled()) {
this.onCallStackChangeScheduler.schedule();
}
}));
const onCallStackChange = Event.any<any>(this.debugService.getViewModel().onDidFocusStackFrame, this.debugService.getViewModel().onDidFocusSession);
this.disposables.push(onCallStackChange(() => {
if (this.ignoreFocusStackFrameEvent) {
return;
}
if (!this.isBodyVisible()) {
this.needsRefresh = true;
return;
}
this.updateTreeSelection();
}));
this.disposables.push(this.tree.onContextMenu(e => this.onContextMenu(e)));
// Schedule the update of the call stack tree if the viewlet is opened after a session started #14684
if (this.debugService.state === State.Stopped) {
this.onCallStackChangeScheduler.schedule(0);
}
this.disposables.push(this.onDidChangeBodyVisibility(visible => {
if (visible && this.needsRefresh) {
this.onCallStackChangeScheduler.schedule();
}
}));
this.disposables.push(this.debugService.onDidNewSession(s => {
if (s.parentSession) {
// Auto expand sessions that have sub sessions
this.parentSessionToExpand.add(s.parentSession);
}
}));
}
layoutBody(height: number, width: number): void {
this.tree.layout(height, width);
}
focus(): void {
this.tree.domFocus();
}
private updateTreeSelection(): void {
if (!this.tree || !this.tree.getInput()) {
// Tree not initialized yet
return;
}
const updateSelectionAndReveal = (element: IStackFrame | IDebugSession) => {
this.ignoreSelectionChangedEvent = true;
try {
this.tree.setSelection([element]);
this.tree.reveal(element);
} catch (e) { }
finally {
this.ignoreSelectionChangedEvent = false;
}
};
const thread = this.debugService.getViewModel().focusedThread;
const session = this.debugService.getViewModel().focusedSession;
const stackFrame = this.debugService.getViewModel().focusedStackFrame;
if (!thread) {
if (!session) {
this.tree.setSelection([]);
} else {
updateSelectionAndReveal(session);
}
} else {
const expandPromises = [() => ignoreErrors(this.tree.expand(thread))];
let s: IDebugSession | undefined = thread.session;
while (s) {
const sessionToExpand = s;
expandPromises.push(() => ignoreErrors(this.tree.expand(sessionToExpand)));
s = s.parentSession;
}
sequence(expandPromises.reverse()).then(() => {
const toReveal = stackFrame || session;
if (toReveal) {
updateSelectionAndReveal(toReveal);
}
});
}
}
private onContextMenu(e: ITreeContextMenuEvent<CallStackItem>): void {
const element = e.element;
if (isDebugSession(element)) {
this.callStackItemType.set('session');
} else if (element instanceof Thread) {
this.callStackItemType.set('thread');
} else if (element instanceof StackFrame) {
this.callStackItemType.set('stackFrame');
} else {
this.callStackItemType.reset();
}
this.contextMenuService.showContextMenu({
getAnchor: () => e.anchor,
getActions: () => {
const actions: IAction[] = [];
fillInContextMenuActions(this.contributedContextMenu, { arg: this.getContextForContributedActions(element), shouldForwardArgs: true }, actions, this.contextMenuService);
return actions;
},
getActionsContext: () => element
});
}
private getContextForContributedActions(element: CallStackItem | null): string | number | undefined {
if (element instanceof StackFrame) {
if (element.source.inMemory) {
return element.source.raw.path || element.source.reference;
}
return element.source.uri.toString();
}
if (element instanceof Thread) {
return element.threadId;
}
if (isDebugSession(element)) {
return element.getId();
}
return undefined;
}
}
interface IThreadTemplateData {
thread: HTMLElement;
name: HTMLElement;
state: HTMLElement;
stateLabel: HTMLSpanElement;
label: HighlightedLabel;
}
interface ISessionTemplateData {
session: HTMLElement;
name: HTMLElement;
state: HTMLElement;
stateLabel: HTMLSpanElement;
label: HighlightedLabel;
}
interface IErrorTemplateData {
label: HTMLElement;
}
interface ILabelTemplateData {
label: HTMLElement;
}
interface IStackFrameTemplateData {
stackFrame: HTMLElement;
file: HTMLElement;
fileName: HTMLElement;
lineNumber: HTMLElement;
label: HighlightedLabel;
}
class SessionsRenderer implements ITreeRenderer<IDebugSession, FuzzyScore, ISessionTemplateData> {
static readonly ID = 'session';
get templateId(): string {
return SessionsRenderer.ID;
}
renderTemplate(container: HTMLElement): ISessionTemplateData {
const session = dom.append(container, $('.session'));
const name = dom.append(session, $('.name'));
const state = dom.append(session, $('.state'));
const stateLabel = dom.append(state, $('span.label'));
const label = new HighlightedLabel(name, false);
return { session, name, state, stateLabel, label };
}
renderElement(element: ITreeNode<IDebugSession, FuzzyScore>, index: number, data: ISessionTemplateData): void {
const session = element.element;
data.session.title = nls.localize({ key: 'session', comment: ['Session is a noun'] }, "Session");
data.label.set(session.getLabel(), createMatches(element.filterData));
const stoppedThread = session.getAllThreads().filter(t => t.stopped).pop();
data.stateLabel.textContent = stoppedThread ? nls.localize('paused', "Paused")
: nls.localize({ key: 'running', comment: ['indicates state'] }, "Running");
}
disposeTemplate(templateData: ISessionTemplateData): void {
// noop
}
}
class ThreadsRenderer implements ITreeRenderer<IThread, FuzzyScore, IThreadTemplateData> {
static readonly ID = 'thread';
get templateId(): string {
return ThreadsRenderer.ID;
}
renderTemplate(container: HTMLElement): IThreadTemplateData {
const thread = dom.append(container, $('.thread'));
const name = dom.append(thread, $('.name'));
const state = dom.append(thread, $('.state'));
const stateLabel = dom.append(state, $('span.label'));
const label = new HighlightedLabel(name, false);
return { thread, name, state, stateLabel, label };
}
renderElement(element: ITreeNode<IThread, FuzzyScore>, index: number, data: IThreadTemplateData): void {
const thread = element.element;
data.thread.title = nls.localize('thread', "Thread");
data.label.set(thread.name, createMatches(element.filterData));
data.stateLabel.textContent = thread.stateLabel;
}
disposeTemplate(templateData: IThreadTemplateData): void {
// noop
}
}
class StackFramesRenderer implements ITreeRenderer<IStackFrame, FuzzyScore, IStackFrameTemplateData> {
static readonly ID = 'stackFrame';
constructor(@ILabelService private readonly labelService: ILabelService) { }
get templateId(): string {
return StackFramesRenderer.ID;
}
renderTemplate(container: HTMLElement): IStackFrameTemplateData {
const stackFrame = dom.append(container, $('.stack-frame'));
const labelDiv = dom.append(stackFrame, $('span.label.expression'));
const file = dom.append(stackFrame, $('.file'));
const fileName = dom.append(file, $('span.file-name'));
const wrapper = dom.append(file, $('span.line-number-wrapper'));
const lineNumber = dom.append(wrapper, $('span.line-number'));
const label = new HighlightedLabel(labelDiv, false);
return { file, fileName, label, lineNumber, stackFrame };
}
renderElement(element: ITreeNode<IStackFrame, FuzzyScore>, index: number, data: IStackFrameTemplateData): void {
const stackFrame = element.element;
dom.toggleClass(data.stackFrame, 'disabled', !stackFrame.source || !stackFrame.source.available || isDeemphasized(stackFrame));
dom.toggleClass(data.stackFrame, 'label', stackFrame.presentationHint === 'label');
dom.toggleClass(data.stackFrame, 'subtle', stackFrame.presentationHint === 'subtle');
data.file.title = stackFrame.source.inMemory ? stackFrame.source.uri.path : this.labelService.getUriLabel(stackFrame.source.uri);
if (stackFrame.source.raw.origin) {
data.file.title += `\n${stackFrame.source.raw.origin}`;
}
data.label.set(stackFrame.name, createMatches(element.filterData), stackFrame.name);
data.fileName.textContent = stackFrame.getSpecificSourceName();
if (stackFrame.range.startLineNumber !== undefined) {
data.lineNumber.textContent = `${stackFrame.range.startLineNumber}`;
if (stackFrame.range.startColumn) {
data.lineNumber.textContent += `:${stackFrame.range.startColumn}`;
}
dom.removeClass(data.lineNumber, 'unavailable');
} else {
dom.addClass(data.lineNumber, 'unavailable');
}
}
disposeTemplate(templateData: IStackFrameTemplateData): void {
// noop
}
}
class ErrorsRenderer implements ITreeRenderer<string, FuzzyScore, IErrorTemplateData> {
static readonly ID = 'error';
get templateId(): string {
return ErrorsRenderer.ID;
}
renderTemplate(container: HTMLElement): IErrorTemplateData {
const label = dom.append(container, $('.error'));
return { label };
}
renderElement(element: ITreeNode<string, FuzzyScore>, index: number, data: IErrorTemplateData): void {
const error = element.element;
data.label.textContent = error;
data.label.title = error;
}
disposeTemplate(templateData: IErrorTemplateData): void {
// noop
}
}
class LoadMoreRenderer implements ITreeRenderer<ThreadAndSessionIds, FuzzyScore, ILabelTemplateData> {
static readonly ID = 'loadMore';
static readonly LABEL = nls.localize('loadMoreStackFrames', "Load More Stack Frames");
get templateId(): string {
return LoadMoreRenderer.ID;
}
renderTemplate(container: HTMLElement): IErrorTemplateData {
const label = dom.append(container, $('.load-more'));
return { label };
}
renderElement(element: ITreeNode<ThreadAndSessionIds, FuzzyScore>, index: number, data: ILabelTemplateData): void {
data.label.textContent = LoadMoreRenderer.LABEL;
}
disposeTemplate(templateData: ILabelTemplateData): void {
// noop
}
}
class ShowMoreRenderer implements ITreeRenderer<IStackFrame[], FuzzyScore, ILabelTemplateData> {
static readonly ID = 'showMore';
get templateId(): string {
return ShowMoreRenderer.ID;
}
renderTemplate(container: HTMLElement): IErrorTemplateData {
const label = dom.append(container, $('.show-more'));
return { label };
}
renderElement(element: ITreeNode<IStackFrame[], FuzzyScore>, index: number, data: ILabelTemplateData): void {
const stackFrames = element.element;
if (stackFrames.every(sf => !!(sf.source && sf.source.origin && sf.source.origin === stackFrames[0].source.origin))) {
data.label.textContent = nls.localize('showMoreAndOrigin', "Show {0} More: {1}", stackFrames.length, stackFrames[0].source.origin);
} else {
data.label.textContent = nls.localize('showMoreStackFrames', "Show {0} More Stack Frames", stackFrames.length);
}
}
disposeTemplate(templateData: ILabelTemplateData): void {
// noop
}
}
class CallStackDelegate implements IListVirtualDelegate<CallStackItem> {
getHeight(element: CallStackItem): number {
return 22;
}
getTemplateId(element: CallStackItem): string {
if (isDebugSession(element)) {
return SessionsRenderer.ID;
}
if (element instanceof Thread) {
return ThreadsRenderer.ID;
}
if (element instanceof StackFrame) {
return StackFramesRenderer.ID;
}
if (typeof element === 'string') {
return ErrorsRenderer.ID;
}
if (element instanceof ThreadAndSessionIds) {
return LoadMoreRenderer.ID;
}
// element instanceof Array
return ShowMoreRenderer.ID;
}
}
function isDebugModel(obj: any): obj is IDebugModel {
return typeof obj.getSessions === 'function';
}
function isDebugSession(obj: any): obj is IDebugSession {
return typeof obj.getAllThreads === 'function';
}
function isDeemphasized(frame: IStackFrame): boolean {
return frame.source.presentationHint === 'deemphasize' || frame.presentationHint === 'deemphasize';
}
class CallStackDataSource implements IAsyncDataSource<IDebugModel, CallStackItem> {
deemphasizedStackFramesToShow: IStackFrame[];
constructor(private debugService: IDebugService) { }
hasChildren(element: IDebugModel | CallStackItem): boolean {
return isDebugModel(element) || isDebugSession(element) || (element instanceof Thread && element.stopped);
}
getChildren(element: IDebugModel | CallStackItem): Promise<CallStackItem[]> {
if (isDebugModel(element)) {
const sessions = element.getSessions();
if (sessions.length === 0) {
return Promise.resolve([]);
}
if (sessions.length > 1 || this.debugService.getViewModel().isMultiSessionView()) {
return Promise.resolve(sessions.filter(s => !s.parentSession));
}
const threads = sessions[0].getAllThreads();
// Only show the threads in the call stack if there is more than 1 thread.
return threads.length === 1 ? this.getThreadChildren(<Thread>threads[0]) : Promise.resolve(threads);
} else if (isDebugSession(element)) {
const childSessions = this.debugService.getModel().getSessions().filter(s => s.parentSession === element);
if (childSessions.length) {
return Promise.resolve(childSessions);
}
return Promise.resolve(element.getAllThreads());
} else {
return this.getThreadChildren(<Thread>element);
}
}
private getThreadChildren(thread: Thread): Promise<CallStackItem[]> {
return this.getThreadCallstack(thread).then(children => {
// Check if some stack frames should be hidden under a parent element since they are deemphasized
const result: CallStackItem[] = [];
children.forEach((child, index) => {
if (child instanceof StackFrame && child.source && isDeemphasized(child)) {
// Check if the user clicked to show the deemphasized source
if (this.deemphasizedStackFramesToShow.indexOf(child) === -1) {
if (result.length) {
const last = result[result.length - 1];
if (last instanceof Array) {
// Collect all the stackframes that will be "collapsed"
last.push(child);
return;
}
}
const nextChild = index < children.length - 1 ? children[index + 1] : undefined;
if (nextChild instanceof StackFrame && nextChild.source && isDeemphasized(nextChild)) {
// Start collecting stackframes that will be "collapsed"
result.push([child]);
return;
}
}
}
result.push(child);
});
return result;
});
}
private getThreadCallstack(thread: Thread): Promise<Array<IStackFrame | string | ThreadAndSessionIds>> {
let callStack: any[] = thread.getCallStack();
let callStackPromise: Promise<any> = Promise.resolve(null);
if (!callStack || !callStack.length) {
callStackPromise = thread.fetchCallStack().then(() => callStack = thread.getCallStack());
}
return callStackPromise.then(() => {
if (callStack.length === 1 && thread.session.capabilities.supportsDelayedStackTraceLoading && thread.stoppedDetails && thread.stoppedDetails.totalFrames && thread.stoppedDetails.totalFrames > 1) {
// To reduce flashing of the call stack view simply append the stale call stack
// once we have the correct data the tree will refresh and we will no longer display it.
callStack = callStack.concat(thread.getStaleCallStack().slice(1));
}
if (thread.stoppedDetails && thread.stoppedDetails.framesErrorMessage) {
callStack = callStack.concat([thread.stoppedDetails.framesErrorMessage]);
}
if (thread.stoppedDetails && thread.stoppedDetails.totalFrames && thread.stoppedDetails.totalFrames > callStack.length && callStack.length > 1) {
callStack = callStack.concat([new ThreadAndSessionIds(thread.session.getId(), thread.threadId)]);
}
return callStack;
});
}
}
class CallStackAccessibilityProvider implements IAccessibilityProvider<CallStackItem> {
getAriaLabel(element: CallStackItem): string {
if (element instanceof Thread) {
return nls.localize('threadAriaLabel', "Thread {0}, callstack, debug", (<Thread>element).name);
}
if (element instanceof StackFrame) {
return nls.localize('stackFrameAriaLabel', "Stack Frame {0} line {1} {2}, callstack, debug", element.name, element.range.startLineNumber, element.getSpecificSourceName());
}
if (isDebugSession(element)) {
return nls.localize('sessionLabel', "Debug Session {0}", element.getLabel());
}
if (typeof element === 'string') {
return element;
}
if (element instanceof Array) {
return nls.localize('showMoreStackFrames', "Show {0} More Stack Frames", element.length);
}
// element instanceof ThreadAndSessionIds
return nls.localize('loadMoreStackFrames', "Load More Stack Frames");
}
}