private static _enter(config: CursorConfiguration, model: ITextModel, keepPosition: boolean, range: Range): ICommand {
if (!model.isCheapToTokenize(range.getStartPosition().lineNumber)) {
let lineText = model.getLineContent(range.startLineNumber);
let indentation = strings.getLeadingWhitespace(lineText).substring(0, range.startColumn - 1);
return TypeOperations._typeCommand(range, '\n' + config.normalizeIndentation(indentation), keepPosition);
}
let r = LanguageConfigurationRegistry.getEnterAction(model, range);
if (r) {
let enterAction = r.enterAction;
let indentation = r.indentation;
if (enterAction.indentAction === IndentAction.None) {
// Nothing special
return TypeOperations._typeCommand(range, '\n' + config.normalizeIndentation(indentation + enterAction.appendText), keepPosition);
} else if (enterAction.indentAction === IndentAction.Indent) {
// Indent once
return TypeOperations._typeCommand(range, '\n' + config.normalizeIndentation(indentation + enterAction.appendText), keepPosition);
} else if (enterAction.indentAction === IndentAction.IndentOutdent) {
// Ultra special
let normalIndent = config.normalizeIndentation(indentation);
let increasedIndent = config.normalizeIndentation(indentation + enterAction.appendText);
let typeText = '\n' + increasedIndent + '\n' + normalIndent;
if (keepPosition) {
return new ReplaceCommandWithoutChangingPosition(range, typeText, true);
} else {
return new ReplaceCommandWithOffsetCursorState(range, typeText, -1, increasedIndent.length - normalIndent.length, true);
}
} else if (enterAction.indentAction === IndentAction.Outdent) {
let actualIndentation = TypeOperations.unshiftIndent(config, indentation);
return TypeOperations._typeCommand(range, '\n' + config.normalizeIndentation(actualIndentation + enterAction.appendText), keepPosition);
}
}
// no enter rules applied, we should check indentation rules then.
if (!config.autoIndent) {
// Nothing special
let lineText = model.getLineContent(range.startLineNumber);
let indentation = strings.getLeadingWhitespace(lineText).substring(0, range.startColumn - 1);
return TypeOperations._typeCommand(range, '\n' + config.normalizeIndentation(indentation), keepPosition);
}
let ir = LanguageConfigurationRegistry.getIndentForEnter(model, range, {
unshiftIndent: (indent) => {
return TypeOperations.unshiftIndent(config, indent);
},
shiftIndent: (indent) => {
return TypeOperations.shiftIndent(config, indent);
},
normalizeIndentation: (indent) => {
return config.normalizeIndentation(indent);
}
}, config.autoIndent);
let lineText = model.getLineContent(range.startLineNumber);
let indentation = strings.getLeadingWhitespace(lineText).substring(0, range.startColumn - 1);
if (ir) {
let oldEndViewColumn = CursorColumns.visibleColumnFromColumn2(config, model, range.getEndPosition());
let oldEndColumn = range.endColumn;
let beforeText = '\n';
if (indentation !== config.normalizeIndentation(ir.beforeEnter)) {
beforeText = config.normalizeIndentation(ir.beforeEnter) + lineText.substring(indentation.length, range.startColumn - 1) + '\n';
range = new Range(range.startLineNumber, 1, range.endLineNumber, range.endColumn);
}
let newLineContent = model.getLineContent(range.endLineNumber);
let firstNonWhitespace = strings.firstNonWhitespaceIndex(newLineContent);
if (firstNonWhitespace >= 0) {
range = range.setEndPosition(range.endLineNumber, Math.max(range.endColumn, firstNonWhitespace + 1));
} else {
range = range.setEndPosition(range.endLineNumber, model.getLineMaxColumn(range.endLineNumber));
}
if (keepPosition) {
return new ReplaceCommandWithoutChangingPosition(range, beforeText + config.normalizeIndentation(ir.afterEnter), true);
} else {
let offset = 0;
if (oldEndColumn <= firstNonWhitespace + 1) {
if (!config.insertSpaces) {
oldEndViewColumn = Math.ceil(oldEndViewColumn / config.tabSize);
}
offset = Math.min(oldEndViewColumn + 1 - config.normalizeIndentation(ir.afterEnter).length - 1, 0);
}
return new ReplaceCommandWithOffsetCursorState(range, beforeText + config.normalizeIndentation(ir.afterEnter), 0, offset, true);
}
} else {
return TypeOperations._typeCommand(range, '\n' + config.normalizeIndentation(indentation), keepPosition);
}
}