TypeScript ITokenizedModel.getLineContent方法代碼示例

	private static _isSurroundSelectionType(config: CursorConfiguration, model: ITokenizedModel, cursors: SingleCursorState[], ch: string): boolean {
		if (!config.autoClosingBrackets || !config.surroundingPairs.hasOwnProperty(ch)) {
			return false;
		}

		for (let i = 0, len = cursors.length; i < len; i++) {
			const cursor = cursors[i];
			const selection = cursor.selection;

			if (selection.isEmpty()) {
				return false;
			}

			let selectionContainsOnlyWhitespace = true;

			for (let lineNumber = selection.startLineNumber; lineNumber <= selection.endLineNumber; lineNumber++) {
				const lineText = model.getLineContent(lineNumber);
				const startIndex = (lineNumber === selection.startLineNumber ? selection.startColumn - 1 : 0);
				const endIndex = (lineNumber === selection.endLineNumber ? selection.endColumn - 1 : lineText.length);
				const selectedText = lineText.substring(startIndex, endIndex);
				if (/[^ \t]/.test(selectedText)) {
					// this selected text contains something other than whitespace
					selectionContainsOnlyWhitespace = false;
					break;
				}
			}

			if (selectionContainsOnlyWhitespace) {
				return false;
			}
		}

		return true;
	}

	private static _typeInterceptorAutoClosingCloseChar(config: CursorConfiguration, model: ITokenizedModel, cursor: SingleCursorState, ch: string): EditOperationResult {
		if (!config.autoClosingBrackets) {
			return null;
		}

		let selection = cursor.selection;

		if (!selection.isEmpty() || !config.autoClosingPairsClose.hasOwnProperty(ch)) {
			return null;
		}

		let position = cursor.position;

		let lineText = model.getLineContent(position.lineNumber);
		let beforeCharacter = lineText.charAt(position.column - 1);

		if (beforeCharacter !== ch) {
			return null;
		}

		let typeSelection = new Range(position.lineNumber, position.column, position.lineNumber, position.column + 1);
		return new EditOperationResult(new ReplaceCommand(typeSelection, ch), {
			shouldPushStackElementBefore: false,
			shouldPushStackElementAfter: false
		});
	}

	private static _runAutoIndentType(config: CursorConfiguration, model: ITokenizedModel, range: Range, ch: string): ICommand {
		let currentIndentation = LanguageConfigurationRegistry.getIndentationAtPosition(model, range.startLineNumber, range.startColumn);
		let actualIndentation = LanguageConfigurationRegistry.getIndentActionForType(model, range, ch, {
			shiftIndent: (indentation) => {
				return TypeOperations.shiftIndent(config, indentation);
			},
			unshiftIndent: (indentation) => {
				return TypeOperations.unshiftIndent(config, indentation);
			},
		});

		if (actualIndentation === null) {
			return null;
		}

		if (actualIndentation !== config.normalizeIndentation(currentIndentation)) {
			let firstNonWhitespace = model.getLineFirstNonWhitespaceColumn(range.startLineNumber);
			if (firstNonWhitespace === 0) {
				return TypeOperations._typeCommand(
					new Range(range.startLineNumber, 0, range.endLineNumber, range.endColumn),
					config.normalizeIndentation(actualIndentation) + ch,
					false
				);
			} else {
				return TypeOperations._typeCommand(
					new Range(range.startLineNumber, 0, range.endLineNumber, range.endColumn),
					config.normalizeIndentation(actualIndentation) +
					model.getLineContent(range.startLineNumber).substring(firstNonWhitespace - 1, range.startColumn - 1) + ch,
					false
				);
			}
		}

		return null;
	}

	private static _isAutoClosingCloseCharType(config: CursorConfiguration, model: ITokenizedModel, selections: Selection[], ch: string): boolean {
		if (!config.autoClosingBrackets || !config.autoClosingPairsClose.hasOwnProperty(ch)) {
			return false;
		}

		const isEqualPair = (ch === config.autoClosingPairsClose[ch]);

		for (let i = 0, len = selections.length; i < len; i++) {
			const selection = selections[i];

			if (!selection.isEmpty()) {
				return false;
			}

			const position = selection.getPosition();
			const lineText = model.getLineContent(position.lineNumber);
			const afterCharacter = lineText.charAt(position.column - 1);

			if (afterCharacter !== ch) {
				return false;
			}

			if (isEqualPair) {
				const lineTextBeforeCursor = lineText.substr(0, position.column - 1);
				const chCntBefore = this._countNeedlesInHaystack(lineTextBeforeCursor, ch);
				if (chCntBefore % 2 === 0) {
					return false;
				}
			}
		}

		return true;
	}

	private matchEnterRule(model: ITokenizedModel, oneLineAbove: number, line: number, indentConverter: IIndentConverter, tabSize: number) {
		while (oneLineAbove >= 1) {
			// ship empty lines as empty lines just inherit indentation
			let lineContent = model.getLineContent(oneLineAbove);
			let nonWhitespaceIdx = strings.lastNonWhitespaceIndex(lineContent);
			if (nonWhitespaceIdx >= 0) {
				break;
			}
			oneLineAbove--;
		}

		if (oneLineAbove < 1 || line > model.getLineCount()) {
			return null;
		}

		let maxColumn = model.getLineMaxColumn(oneLineAbove);
		let enter = LanguageConfigurationRegistry.getEnterAction(model, new Range(oneLineAbove, maxColumn, oneLineAbove, maxColumn));

		if (enter) {
			let enterPrefix = enter.indentation;
			let enterAction = enter.enterAction;

			if (enterAction.indentAction === IndentAction.None) {
				enterPrefix = enter.indentation + enterAction.appendText;
			} else if (enterAction.indentAction === IndentAction.Indent) {
				enterPrefix = enter.indentation + enterAction.appendText;
			} else if (enterAction.indentAction === IndentAction.IndentOutdent) {
				enterPrefix = enter.indentation;
			} else if (enterAction.indentAction === IndentAction.Outdent) {
				enterPrefix = indentConverter.unshiftIndent(enter.indentation) + enterAction.appendText;
			}
			let movingLineText = model.getLineContent(line);
			if (this.trimLeft(movingLineText).indexOf(this.trimLeft(enterPrefix)) >= 0) {
				let oldIndentation = strings.getLeadingWhitespace(model.getLineContent(line));
				let newIndentation = strings.getLeadingWhitespace(enterPrefix);
				let indentMetadataOfMovelingLine = LanguageConfigurationRegistry.getIndentMetadata(model, line);
				if (indentMetadataOfMovelingLine & IndentConsts.DECREASE_MASK) {
					newIndentation = indentConverter.unshiftIndent(newIndentation);
				}
				let newSpaceCnt = IndentUtil.getSpaceCnt(newIndentation, tabSize);
				let oldSpaceCnt = IndentUtil.getSpaceCnt(oldIndentation, tabSize);
				return newSpaceCnt - oldSpaceCnt;
			}
		}

		return null;
	}

	private static _enter(config: CursorConfiguration, model: ITokenizedModel, keepPosition: boolean, range: Range): CommandResult {
		let r = LanguageConfigurationRegistry.getEnterAction(model, range);
		let enterAction = r.enterAction;
		let indentation = r.indentation;

		let beforeText = '';

		if (!r.ignoreCurrentLine) {
			// textBeforeEnter doesn't match unIndentPattern.
			let goodIndent = this._goodIndentForLine(config, model, range.startLineNumber);

			if (goodIndent !== null && goodIndent === r.indentation) {
				if (enterAction.outdentCurrentLine) {
					goodIndent = TypeOperations.unshiftIndent(config, goodIndent);
				}

				let lineText = model.getLineContent(range.startLineNumber);
				if (config.normalizeIndentation(goodIndent) !== config.normalizeIndentation(indentation)) {
					beforeText = config.normalizeIndentation(goodIndent) + lineText.substring(indentation.length, range.startColumn - 1);
					indentation = goodIndent;
					range = new Range(range.startLineNumber, 1, range.endLineNumber, range.endColumn);
				}
			}
		}

		if (enterAction.removeText) {
			indentation = indentation.substring(0, indentation.length - enterAction.removeText);
		}

		let executeCommand: ICommand;
		if (enterAction.indentAction === IndentAction.None) {
			// Nothing special
			executeCommand = TypeOperations.typeCommand(range, beforeText + '\n' + config.normalizeIndentation(indentation + enterAction.appendText), keepPosition);

		} else if (enterAction.indentAction === IndentAction.Indent) {
			// Indent once
			executeCommand = TypeOperations.typeCommand(range, beforeText + '\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 = beforeText + '\n' + increasedIndent + '\n' + normalIndent;

			if (keepPosition) {
				executeCommand = new ReplaceCommandWithoutChangingPosition(range, typeText);
			} else {
				executeCommand = new ReplaceCommandWithOffsetCursorState(range, typeText, -1, increasedIndent.length - normalIndent.length);
			}
		} else if (enterAction.indentAction === IndentAction.Outdent) {
			let actualIndentation = TypeOperations.unshiftIndent(config, indentation);
			executeCommand = TypeOperations.typeCommand(range, beforeText + '\n' + config.normalizeIndentation(actualIndentation + enterAction.appendText), keepPosition);
		}

		return new CommandResult(executeCommand, true);
	}

	private static _typeInterceptorAutoClosingOpenChar(config: CursorConfiguration, model: ITokenizedModel, cursor: SingleCursorState, ch: string): EditOperationResult {
		if (!config.autoClosingBrackets) {
			return null;
		}

		let selection = cursor.selection;

		if (!selection.isEmpty() || !config.autoClosingPairsOpen.hasOwnProperty(ch)) {
			return null;
		}

		let position = cursor.position;
		let lineText = model.getLineContent(position.lineNumber);
		let beforeCharacter = lineText.charAt(position.column - 1);

		// Only consider auto closing the pair if a space follows or if another autoclosed pair follows
		if (beforeCharacter) {
			let thisBraceIsSymmetric = (config.autoClosingPairsOpen[ch] === ch);

			let isBeforeCloseBrace = false;
			for (let otherCloseBrace in config.autoClosingPairsClose) {
				let otherBraceIsSymmetric = (config.autoClosingPairsOpen[otherCloseBrace] === otherCloseBrace);
				if (!thisBraceIsSymmetric && otherBraceIsSymmetric) {
					continue;
				}
				if (beforeCharacter === otherCloseBrace) {
					isBeforeCloseBrace = true;
					break;
				}
			}
			if (!isBeforeCloseBrace && !/\s/.test(beforeCharacter)) {
				return null;
			}
		}

		let lineTokens = model.getLineTokens(position.lineNumber, false);

		let shouldAutoClosePair = false;
		try {
			shouldAutoClosePair = LanguageConfigurationRegistry.shouldAutoClosePair(ch, lineTokens, position.column);
		} catch (e) {
			onUnexpectedError(e);
		}

		if (!shouldAutoClosePair) {
			return null;
		}

		let closeCharacter = config.autoClosingPairsOpen[ch];
		return new EditOperationResult(new ReplaceCommandWithOffsetCursorState(selection, ch + closeCharacter, 0, -closeCharacter.length), {
			shouldPushStackElementBefore: true,
			shouldPushStackElementAfter: false
		});
	}

	private static _isAutoClosingOpenCharType(config: CursorConfiguration, model: ITokenizedModel, cursors: SingleCursorState[], ch: string): boolean {
		if (!config.autoClosingBrackets || !config.autoClosingPairsOpen.hasOwnProperty(ch)) {
			return false;
		}

		for (let i = 0, len = cursors.length; i < len; i++) {
			const cursor = cursors[i];
			const selection = cursor.selection;
			if (!selection.isEmpty()) {
				return false;
			}

			const position = cursor.position;
			const lineText = model.getLineContent(position.lineNumber);
			const afterCharacter = lineText.charAt(position.column - 1);

			// Only consider auto closing the pair if a space follows or if another autoclosed pair follows
			if (afterCharacter) {
				const thisBraceIsSymmetric = (config.autoClosingPairsOpen[ch] === ch);

				let isBeforeCloseBrace = false;
				for (let otherCloseBrace in config.autoClosingPairsClose) {
					const otherBraceIsSymmetric = (config.autoClosingPairsOpen[otherCloseBrace] === otherCloseBrace);
					if (!thisBraceIsSymmetric && otherBraceIsSymmetric) {
						continue;
					}
					if (afterCharacter === otherCloseBrace) {
						isBeforeCloseBrace = true;
						break;
					}
				}
				if (!isBeforeCloseBrace && !/\s/.test(afterCharacter)) {
					return false;
				}
			}

			model.forceTokenization(position.lineNumber);
			const lineTokens = model.getLineTokens(position.lineNumber);

			let shouldAutoClosePair = false;
			try {
				shouldAutoClosePair = LanguageConfigurationRegistry.shouldAutoClosePair(ch, lineTokens, position.column);
			} catch (e) {
				onUnexpectedError(e);
			}

			if (!shouldAutoClosePair) {
				return false;
			}
		}

		return true;
	}

	private static _goodIndentForLine(config: CursorConfiguration, model: ITokenizedModel, lineNumber: number): string {
		let action;
		let indentation;
		let expectedIndentAction = LanguageConfigurationRegistry.getInheritIndentForLine(model, lineNumber, false);

		if (expectedIndentAction) {
			action = expectedIndentAction.action;
			indentation = expectedIndentAction.indentation;
		} else if (lineNumber > 1) {
			let lastLineNumber = lineNumber - 1;
			for (lastLineNumber = lineNumber - 1; lastLineNumber >= 1; lastLineNumber--) {
				let lineText = model.getLineContent(lastLineNumber);
				let nonWhitespaceIdx = strings.lastNonWhitespaceIndex(lineText);
				if (nonWhitespaceIdx >= 0) {
					break;
				}
			}

			if (lastLineNumber < 1) {
				// No previous line with content found
				return null;
			}

			let maxColumn = model.getLineMaxColumn(lastLineNumber);
			let expectedEnterAction = LanguageConfigurationRegistry.getEnterAction(model, new Range(lastLineNumber, maxColumn, lastLineNumber, maxColumn));
			if (expectedEnterAction) {
				indentation = expectedEnterAction.indentation;
				action = expectedEnterAction.enterAction;
				if (action) {
					indentation += action.appendText;
				}
			}
		}

		if (action) {
			if (action === IndentAction.Indent) {
				indentation = TypeOperations.shiftIndent(config, indentation);
			}

			if (action === IndentAction.Outdent) {
				indentation = TypeOperations.unshiftIndent(config, indentation);
			}

			indentation = config.normalizeIndentation(indentation);
		}

		if (!indentation) {
			return null;
		}

		return indentation;
	}

	public static tab(config: CursorConfiguration, model: ITokenizedModel, cursors: SingleCursorState[]): EditOperationResult {
		let commands: CommandResult[] = [];
		for (let i = 0, len = cursors.length; i < len; i++) {
			const cursor = cursors[i];
			let selection = cursor.selection;

			if (selection.isEmpty()) {

				let lineText = model.getLineContent(selection.startLineNumber);

				if (/^\s*$/.test(lineText)) {
					let goodIndent = this._goodIndentForLine(config, model, selection.startLineNumber);
					goodIndent = goodIndent || '\t';
					let possibleTypeText = config.normalizeIndentation(goodIndent);
					if (!strings.startsWith(lineText, possibleTypeText)) {
						let command = new ReplaceCommand(new Range(selection.startLineNumber, 1, selection.startLineNumber, lineText.length + 1), possibleTypeText);
						commands[i] = new CommandResult(command, true);
						continue;
					}
				}

				commands[i] = new CommandResult(this._replaceJumpToNextIndent(config, model, selection), true);
			} else {
				if (selection.startLineNumber === selection.endLineNumber) {
					let lineMaxColumn = model.getLineMaxColumn(selection.startLineNumber);
					if (selection.startColumn !== 1 || selection.endColumn !== lineMaxColumn) {
						// This is a single line selection that is not the entire line
						commands[i] = new CommandResult(this._replaceJumpToNextIndent(config, model, selection), false);
						continue;
					}
				}

				commands[i] = new CommandResult(
					new ShiftCommand(selection, {
						isUnshift: false,
						tabSize: config.tabSize,
						oneIndent: config.oneIndent,
						useTabStops: config.useTabStops
					}),
					false
				);
			}
		}
		return new EditOperationResult(commands, {
			shouldPushStackElementBefore: true,
			shouldPushStackElementAfter: true
		});
	}