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simpleRefactorProvider.ts
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136 lines (122 loc) · 5.93 KB
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'use strict';
import * as vscode from 'vscode';
import { RefactorProxy } from '../refactor/proxy';
import { getTextEditsFromPatch } from '../common/editor';
import { PythonSettings, IPythonSettings } from '../common/configSettings';
interface RenameResponse {
results: [{ diff: string }];
}
export function activateSimplePythonRefactorProvider(context: vscode.ExtensionContext, outputChannel: vscode.OutputChannel) {
let disposable = vscode.commands.registerCommand('python.refactorExtractVariable', () => {
extractVariable(context.extensionPath,
vscode.window.activeTextEditor,
vscode.window.activeTextEditor.selection,
outputChannel).catch(() => { });
});
context.subscriptions.push(disposable);
disposable = vscode.commands.registerCommand('python.refactorExtractMethod', () => {
extractMethod(context.extensionPath,
vscode.window.activeTextEditor,
vscode.window.activeTextEditor.selection,
outputChannel).catch(() => { });
});
context.subscriptions.push(disposable);
}
// Exported for unit testing
export function extractVariable(extensionDir: string, textEditor: vscode.TextEditor, range: vscode.Range,
outputChannel: vscode.OutputChannel, workspaceRoot: string = vscode.workspace.rootPath,
pythonSettings: IPythonSettings = PythonSettings.getInstance()): Promise<any> {
return validateDocumentForRefactor(textEditor).then(() => {
let newName = 'newvariable' + new Date().getMilliseconds().toString();
let proxy = new RefactorProxy(extensionDir, pythonSettings, workspaceRoot);
let rename = proxy.extractVariable<RenameResponse>(textEditor.document, newName, textEditor.document.uri.fsPath, range, textEditor.options).then(response => {
return response.results[0].diff;
});
return extractName(extensionDir, textEditor, range, newName, rename, outputChannel);
});
}
// Exported for unit testing
export function extractMethod(extensionDir: string, textEditor: vscode.TextEditor, range: vscode.Range,
outputChannel: vscode.OutputChannel, workspaceRoot: string = vscode.workspace.rootPath,
pythonSettings: IPythonSettings = PythonSettings.getInstance()): Promise<any> {
return validateDocumentForRefactor(textEditor).then(() => {
let newName = 'newmethod' + new Date().getMilliseconds().toString();
let proxy = new RefactorProxy(extensionDir, pythonSettings, workspaceRoot);
let rename = proxy.extractMethod<RenameResponse>(textEditor.document, newName, textEditor.document.uri.fsPath, range, textEditor.options).then(response => {
return response.results[0].diff;
});
return extractName(extensionDir, textEditor, range, newName, rename, outputChannel);
});
}
function validateDocumentForRefactor(textEditor: vscode.TextEditor): Promise<any> {
if (!textEditor.document.isDirty) {
return Promise.resolve();
}
return new Promise<any>((resolve, reject) => {
vscode.window.showInformationMessage('Please save changes before refactoring', 'Save').then(item => {
if (item === 'Save') {
textEditor.document.save().then(resolve, reject);
}
else {
return reject();
}
});
});
}
function extractName(extensionDir: string, textEditor: vscode.TextEditor, range: vscode.Range, newName: string,
renameResponse: Promise<string>, outputChannel: vscode.OutputChannel): Promise<any> {
let changeStartsAtLine = -1;
return renameResponse.then(diff => {
if (diff.length === 0) {
return [];
}
let edits = getTextEditsFromPatch(textEditor.document.getText(), diff);
return edits;
}).then(edits => {
return textEditor.edit(editBuilder => {
edits.forEach(edit => {
if (changeStartsAtLine === -1 || changeStartsAtLine > edit.range.start.line) {
changeStartsAtLine = edit.range.start.line;
}
editBuilder.replace(edit.range, edit.newText);
});
});
}).then(done => {
if (done && changeStartsAtLine >= 0) {
let newWordPosition: vscode.Position;
for (let lineNumber = changeStartsAtLine; lineNumber < textEditor.document.lineCount; lineNumber++) {
let line = textEditor.document.lineAt(lineNumber);
let indexOfWord = line.text.indexOf(newName);
if (indexOfWord >= 0) {
newWordPosition = new vscode.Position(line.range.start.line, indexOfWord);
break;
}
}
if (newWordPosition) {
textEditor.selections = [new vscode.Selection(newWordPosition, new vscode.Position(newWordPosition.line, newWordPosition.character + newName.length))];
textEditor.revealRange(new vscode.Range(textEditor.selection.start, textEditor.selection.end), vscode.TextEditorRevealType.Default);
}
return newWordPosition;
}
return null;
}).then(newWordPosition => {
if (newWordPosition) {
return textEditor.document.save().then(() => {
// Now that we have selected the new variable, lets invoke the rename command
return vscode.commands.executeCommand('editor.action.rename');
});
}
}).catch(error => {
let errorMessage = error + '';
if (typeof error === 'string') {
errorMessage = error;
}
if (typeof error === 'object' && error.message) {
errorMessage = error.message;
}
outputChannel.appendLine('#'.repeat(10) + 'Refactor Output' + '#'.repeat(10));
outputChannel.appendLine('Error in refactoring:\n' + errorMessage);
vscode.window.showErrorMessage(`Cannot perform refactoring using selected element(s). (${errorMessage})`);
return Promise.reject(error);
});
}