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Added editing features to Langium-based example
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89 changes: 89 additions & 0 deletions
89
examples/states-langium/language-server/src/code-actions.ts
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,89 @@ | ||
| /******************************************************************************** | ||
| * Copyright (c) 2023 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 | ||
| ********************************************************************************/ | ||
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| import { LangiumDocument, MaybePromise, URI } from 'langium'; | ||
| import { CodeActionProvider } from 'langium/lsp'; | ||
| import { CodeActionParams, Command, CodeAction, Position, WorkspaceEdit } from 'vscode-languageserver'; | ||
| import { StateMachine } from './generated/ast.js'; | ||
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| const CREATE_STATE_KIND = 'sprotty.create.state'; | ||
| const CREATE_EVENT_KIND = 'sprotty.create.event'; | ||
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| export class StatesCodeActionProvider implements CodeActionProvider { | ||
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| getCodeActions(document: LangiumDocument<StateMachine>, params: CodeActionParams): MaybePromise<(Command | CodeAction)[] | undefined> { | ||
| const sm = document.parseResult.value; | ||
| const result: CodeAction[] = []; | ||
| const endOfDocument = document.textDocument.positionAt(document.textDocument.getText().length); | ||
| if (matchesContext(CREATE_STATE_KIND, params)) { | ||
| result.push({ | ||
| kind: CREATE_STATE_KIND, | ||
| title: 'new State', | ||
| edit: createInsertWorkspaceEdit( | ||
| document.uri, | ||
| endOfDocument, | ||
| '\n' + 'state ' + getNewName('state', sm.states.map(s => s.name)) | ||
| ) | ||
| }); | ||
| } | ||
| if (matchesContext(CREATE_EVENT_KIND, params)) { | ||
| result.push({ | ||
| kind: CREATE_EVENT_KIND, | ||
| title: 'new Event', | ||
| edit: createInsertWorkspaceEdit( | ||
| document.uri, | ||
| endOfDocument, | ||
| '\n' + 'event '+ getNewName('event', sm.events.map(e => e.name)) | ||
| ) | ||
| }); | ||
| } | ||
| return result; | ||
| } | ||
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| } | ||
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| function matchesContext(kind: string, params: CodeActionParams): boolean { | ||
| if (!params.context?.only) { | ||
| return true; | ||
| } else { | ||
| return params.context.only.some(k => kind.startsWith(k)); | ||
| } | ||
| } | ||
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| function getNewName(prefix: string, siblings: string[]): string { | ||
| for (let i = 0;; i++) { | ||
| const currentName = prefix + i; | ||
| if (!siblings.some(s => s === currentName)) { | ||
| return currentName; | ||
| } | ||
| } | ||
| } | ||
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| function createInsertWorkspaceEdit(uri: URI, position: Position, text: string): WorkspaceEdit { | ||
| return { | ||
| changes: { | ||
| [uri.toString()]: [ | ||
| { | ||
| range: { | ||
| start: position, | ||
| end: position | ||
| }, | ||
| newText: text | ||
| } | ||
| ] | ||
| } | ||
| }; | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,15 @@ | ||
| .sprotty-popup { | ||
| padding: 0; | ||
| color: var(--vscode-editorHoverWidget-foreground); | ||
| background: var(--vscode-editorHoverWidget-background); | ||
| border-color: var(--vscode-editorHoverWidget-border); | ||
| } | ||
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| .sprotty-palette > div { | ||
| padding: 0 4px; | ||
| cursor: pointer; | ||
| } | ||
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| .sprotty-palette > div:hover { | ||
| color: var(--vscode-textLink-activeForeground); | ||
| } |
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