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/*---------------------------------------------------------------------------------------------
* Copyright (c) Microsoft Corporation. All rights reserved.
* Licensed under the MIT License. See License.txt in the project root for license information.
*--------------------------------------------------------------------------------------------*/
import { createCancelablePromise, RunOnceScheduler } from 'vs/base/common/async';
import { onUnexpectedError } from 'vs/base/common/errors';
import { MutableDisposable, toDisposable } from 'vs/base/common/lifecycle';
import { IActiveCodeEditor } from 'vs/editor/browser/editorBrowser';
import { EditorOption } from 'vs/editor/common/config/editorOptions';
import { InlineCompletionTriggerKind, SelectedSuggestionInfo } from 'vs/editor/common/languages';
import { ILanguageFeaturesService } from 'vs/editor/common/services/languageFeatures';
import { SharedInlineCompletionCache } from 'vs/editor/contrib/inlineCompletions/browser/ghostTextModel';
import { BaseGhostTextWidgetModel, GhostText } from './ghostText';
import { provideInlineCompletions, TrackedInlineCompletions, UpdateOperation } from './inlineCompletionsModel';
import { inlineCompletionToGhostText, minimizeInlineCompletion, NormalizedInlineCompletion } from './inlineCompletionToGhostText';
import { SuggestWidgetInlineCompletionProvider } from './suggestWidgetInlineCompletionProvider';
export class SuggestWidgetPreviewModel extends BaseGhostTextWidgetModel {
private readonly suggestionInlineCompletionSource = this._register(
new SuggestWidgetInlineCompletionProvider(
this.editor,
// Use the first cache item (if any) as preselection.
() => this.cache.value?.completions[0]?.toLiveInlineCompletion()
)
);
private readonly updateOperation = this._register(new MutableDisposable<UpdateOperation>());
private readonly updateCacheSoon = this._register(new RunOnceScheduler(() => this.updateCache(), 50));
public override minReservedLineCount: number = 0;
public get isActive(): boolean {
return this.suggestionInlineCompletionSource.state !== undefined;
}
constructor(
editor: IActiveCodeEditor,
private readonly cache: SharedInlineCompletionCache,
@ILanguageFeaturesService private readonly languageFeaturesService: ILanguageFeaturesService,
) {
super(editor);
this._register(this.suggestionInlineCompletionSource.onDidChange(() => {
if (!this.editor.hasModel()) {
// onDidChange might be called when calling setModel on the editor, before we are disposed.
return;
}
this.updateCacheSoon.schedule();
const suggestWidgetState = this.suggestionInlineCompletionSource.state;
if (!suggestWidgetState) {
this.minReservedLineCount = 0;
}
const newGhostText = this.ghostText;
if (newGhostText) {
this.minReservedLineCount = Math.max(this.minReservedLineCount, sum(newGhostText.parts.map(p => p.lines.length - 1)));
}
if (this.minReservedLineCount >= 1) {
this.suggestionInlineCompletionSource.forceRenderingAbove();
} else {
this.suggestionInlineCompletionSource.stopForceRenderingAbove();
}
this.onDidChangeEmitter.fire();
}));
this._register(this.cache.onDidChange(() => {
this.onDidChangeEmitter.fire();
}));
this._register(this.editor.onDidChangeCursorPosition((e) => {
this.minReservedLineCount = 0;
this.updateCacheSoon.schedule();
this.onDidChangeEmitter.fire();
}));
this._register(toDisposable(() => this.suggestionInlineCompletionSource.stopForceRenderingAbove()));
}
private isSuggestionPreviewEnabled(): boolean {
const suggestOptions = this.editor.getOption(EditorOption.suggest);
return suggestOptions.preview;
}
private async updateCache() {
const state = this.suggestionInlineCompletionSource.state;
if (!state || !state.selectedItem) {
return;
}
const info: SelectedSuggestionInfo = {
text: state.selectedItem.normalizedInlineCompletion.insertText,
range: state.selectedItem.normalizedInlineCompletion.range,
isSnippetText: state.selectedItem.isSnippetText,
completionKind: state.selectedItem.completionItemKind,
};
const position = this.editor.getPosition();
const promise = createCancelablePromise(async token => {
let result: TrackedInlineCompletions;
try {
result = await provideInlineCompletions(this.languageFeaturesService.inlineCompletionsProvider, position,
this.editor.getModel(),
{ triggerKind: InlineCompletionTriggerKind.Automatic, selectedSuggestionInfo: info },
token
);
} catch (e) {
onUnexpectedError(e);
return;
}
if (token.isCancellationRequested) {
result.dispose();
return;
}
this.cache.setValue(
this.editor,
result,
InlineCompletionTriggerKind.Automatic
);
this.onDidChangeEmitter.fire();
});
const operation = new UpdateOperation(promise, InlineCompletionTriggerKind.Automatic);
this.updateOperation.value = operation;
await promise;
if (this.updateOperation.value === operation) {
this.updateOperation.clear();
}
}
public override get ghostText(): GhostText | undefined {
const isSuggestionPreviewEnabled = this.isSuggestionPreviewEnabled();
const model = this.editor.getModel();
const augmentedCompletion = minimizeInlineCompletion(model, this.cache.value?.completions[0]?.toLiveInlineCompletion());
const suggestWidgetState = this.suggestionInlineCompletionSource.state;
const suggestInlineCompletion = minimizeInlineCompletion(model, suggestWidgetState?.selectedItem?.normalizedInlineCompletion);
const isAugmentedCompletionValid = augmentedCompletion
&& suggestInlineCompletion
&& augmentedCompletion.insertText.startsWith(suggestInlineCompletion.insertText)
&& augmentedCompletion.range.equalsRange(suggestInlineCompletion.range);
if (!isSuggestionPreviewEnabled && !isAugmentedCompletionValid) {
return undefined;
}
// If the augmented completion is not valid and there is no suggest inline completion, we still show the augmented completion.
const finalCompletion = isAugmentedCompletionValid ? augmentedCompletion : (suggestInlineCompletion || augmentedCompletion);
const inlineCompletionPreviewLength = isAugmentedCompletionValid ? finalCompletion!.insertText.length - suggestInlineCompletion.insertText.length : 0;
const newGhostText = this.toGhostText(finalCompletion, inlineCompletionPreviewLength);
return newGhostText;
}
private toGhostText(completion: NormalizedInlineCompletion | undefined, inlineCompletionPreviewLength: number): GhostText | undefined {
const mode = this.editor.getOptions().get(EditorOption.suggest).previewMode;
return completion
? (
inlineCompletionToGhostText(completion, this.editor.getModel(), mode, this.editor.getPosition(), inlineCompletionPreviewLength) ||
// Show an invisible ghost text to reserve space
new GhostText(completion.range.endLineNumber, [], this.minReservedLineCount)
)
: undefined;
}
}
function sum(arr: number[]): number {
return arr.reduce((a, b) => a + b, 0);
}
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