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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 { CharCode } from 'vs/base/common/charCode';
import { EditOperation, ISingleEditOperation } from 'vs/editor/common/core/editOperation';
import { Position } from 'vs/editor/common/core/position';
import { Range } from 'vs/editor/common/core/range';
import { Selection } from 'vs/editor/common/core/selection';
import { ICommand, ICursorStateComputerData, IEditOperationBuilder } from 'vs/editor/common/editorCommon';
import { ITextModel } from 'vs/editor/common/model';
import { ILanguageConfigurationService } from 'vs/editor/common/languages/languageConfigurationRegistry';
export class BlockCommentCommand implements ICommand {
private readonly _selection: Selection;
private readonly _insertSpace: boolean;
private _usedEndToken: string | null;
constructor(
selection: Selection,
insertSpace: boolean,
private readonly languageConfigurationService: ILanguageConfigurationService
) {
this._selection = selection;
this._insertSpace = insertSpace;
this._usedEndToken = null;
}
public static _haystackHasNeedleAtOffset(haystack: string, needle: string, offset: number): boolean {
if (offset < 0) {
return false;
}
const needleLength = needle.length;
const haystackLength = haystack.length;
if (offset + needleLength > haystackLength) {
return false;
}
for (let i = 0; i < needleLength; i++) {
const codeA = haystack.charCodeAt(offset + i);
const codeB = needle.charCodeAt(i);
if (codeA === codeB) {
continue;
}
if (codeA >= CharCode.A && codeA <= CharCode.Z && codeA + 32 === codeB) {
// codeA is upper-case variant of codeB
continue;
}
if (codeB >= CharCode.A && codeB <= CharCode.Z && codeB + 32 === codeA) {
// codeB is upper-case variant of codeA
continue;
}
return false;
}
return true;
}
private _createOperationsForBlockComment(selection: Range, startToken: string, endToken: string, insertSpace: boolean, model: ITextModel, builder: IEditOperationBuilder): void {
const startLineNumber = selection.startLineNumber;
const startColumn = selection.startColumn;
const endLineNumber = selection.endLineNumber;
const endColumn = selection.endColumn;
const startLineText = model.getLineContent(startLineNumber);
const endLineText = model.getLineContent(endLineNumber);
let startTokenIndex = startLineText.lastIndexOf(startToken, startColumn - 1 + startToken.length);
let endTokenIndex = endLineText.indexOf(endToken, endColumn - 1 - endToken.length);
if (startTokenIndex !== -1 && endTokenIndex !== -1) {
if (startLineNumber === endLineNumber) {
const lineBetweenTokens = startLineText.substring(startTokenIndex + startToken.length, endTokenIndex);
if (lineBetweenTokens.indexOf(endToken) >= 0) {
// force to add a block comment
startTokenIndex = -1;
endTokenIndex = -1;
}
} else {
const startLineAfterStartToken = startLineText.substring(startTokenIndex + startToken.length);
const endLineBeforeEndToken = endLineText.substring(0, endTokenIndex);
if (startLineAfterStartToken.indexOf(endToken) >= 0 || endLineBeforeEndToken.indexOf(endToken) >= 0) {
// force to add a block comment
startTokenIndex = -1;
endTokenIndex = -1;
}
}
}
let ops: ISingleEditOperation[];
if (startTokenIndex !== -1 && endTokenIndex !== -1) {
// Consider spaces as part of the comment tokens
if (insertSpace && startTokenIndex + startToken.length < startLineText.length && startLineText.charCodeAt(startTokenIndex + startToken.length) === CharCode.Space) {
// Pretend the start token contains a trailing space
startToken = startToken + ' ';
}
if (insertSpace && endTokenIndex > 0 && endLineText.charCodeAt(endTokenIndex - 1) === CharCode.Space) {
// Pretend the end token contains a leading space
endToken = ' ' + endToken;
endTokenIndex -= 1;
}
ops = BlockCommentCommand._createRemoveBlockCommentOperations(
new Range(startLineNumber, startTokenIndex + startToken.length + 1, endLineNumber, endTokenIndex + 1), startToken, endToken
);
} else {
ops = BlockCommentCommand._createAddBlockCommentOperations(selection, startToken, endToken, this._insertSpace);
this._usedEndToken = ops.length === 1 ? endToken : null;
}
for (const op of ops) {
builder.addTrackedEditOperation(op.range, op.text);
}
}
public static _createRemoveBlockCommentOperations(r: Range, startToken: string, endToken: string): ISingleEditOperation[] {
let res: ISingleEditOperation[] = [];
if (!Range.isEmpty(r)) {
// Remove block comment start
res.push(EditOperation.delete(new Range(
r.startLineNumber, r.startColumn - startToken.length,
r.startLineNumber, r.startColumn
)));
// Remove block comment end
res.push(EditOperation.delete(new Range(
r.endLineNumber, r.endColumn,
r.endLineNumber, r.endColumn + endToken.length
)));
} else {
// Remove both continuously
res.push(EditOperation.delete(new Range(
r.startLineNumber, r.startColumn - startToken.length,
r.endLineNumber, r.endColumn + endToken.length
)));
}
return res;
}
public static _createAddBlockCommentOperations(r: Range, startToken: string, endToken: string, insertSpace: boolean): ISingleEditOperation[] {
let res: ISingleEditOperation[] = [];
if (!Range.isEmpty(r)) {
// Insert block comment start
res.push(EditOperation.insert(new Position(r.startLineNumber, r.startColumn), startToken + (insertSpace ? ' ' : '')));
// Insert block comment end
res.push(EditOperation.insert(new Position(r.endLineNumber, r.endColumn), (insertSpace ? ' ' : '') + endToken));
} else {
// Insert both continuously
res.push(EditOperation.replace(new Range(
r.startLineNumber, r.startColumn,
r.endLineNumber, r.endColumn
), startToken + ' ' + endToken));
}
return res;
}
public getEditOperations(model: ITextModel, builder: IEditOperationBuilder): void {
const startLineNumber = this._selection.startLineNumber;
const startColumn = this._selection.startColumn;
model.tokenization.tokenizeIfCheap(startLineNumber);
const languageId = model.getLanguageIdAtPosition(startLineNumber, startColumn);
const config = this.languageConfigurationService.getLanguageConfiguration(languageId).comments;
if (!config || !config.blockCommentStartToken || !config.blockCommentEndToken) {
// Mode does not support block comments
return;
}
this._createOperationsForBlockComment(this._selection, config.blockCommentStartToken, config.blockCommentEndToken, this._insertSpace, model, builder);
}
public computeCursorState(model: ITextModel, helper: ICursorStateComputerData): Selection {
const inverseEditOperations = helper.getInverseEditOperations();
if (inverseEditOperations.length === 2) {
const startTokenEditOperation = inverseEditOperations[0];
const endTokenEditOperation = inverseEditOperations[1];
return new Selection(
startTokenEditOperation.range.endLineNumber,
startTokenEditOperation.range.endColumn,
endTokenEditOperation.range.startLineNumber,
endTokenEditOperation.range.startColumn
);
} else {
const srcRange = inverseEditOperations[0].range;
const deltaColumn = this._usedEndToken ? -this._usedEndToken.length - 1 : 0; // minus 1 space before endToken
return new Selection(
srcRange.endLineNumber,
srcRange.endColumn + deltaColumn,
srcRange.endLineNumber,
srcRange.endColumn + deltaColumn
);
}
}
}
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