snakeskin/lib/api/error.js

Компилятор блочных шаблонов c поддержкой наследования.

/*!
 * API для обработки ошибок трансляции
 */

/**
 * Вывести дополнительную информацию об ошибке
 * @return {string}
 */
DirObj.prototype.genErrorAdvInfo = function () {
	var nl = this.lineSeparator;
	var info = this.info,
		str = '';

	if (!info) {
		return str;
	}

	forIn(info, (el, key) => {
		if (el == null) {
			return;
		}

		if (el.innerHTML) {
			str += `${key}: (class: ${el.className || 'undefined'}, id: ${el.id || 'undefined'}), `;

		} else {
			str += `${key}: ${el}, `;
		}
	});

	str = str.replace(/, $/, '');
	var line = info['line'];

	var cutRgxp = /\/\*!!= (.*?) =\*\//g,
		privateRgxp = new RegExp(`${ADV_LEFT_BLOCK}?${LEFT_BLOCK}__.*?__.*?${RIGHT_BLOCK}`, 'g'),
		styleRgxp = /\t|[ ]{4}/g;

	if (line) {
		let prfx = '',
			max = 0;

		for (let i = 8; i--;) {
			let pos = line - i - 2,
				prev = this.lines[pos];

			let space = new Array(String(line - 1).length - String(pos).length + 1)
				.join(' ');

			if (prev != null) {
				prev = prev
					.replace(styleRgxp, '  ')
					.replace(privateRgxp, '')
					.replace(cutRgxp, '$1');

				let part;

				if (prev.trim()) {
					part = `${nl}  ${pos + 1} ${space}${prev}`;

				} else {
					part = `${nl}  ...`;
				}

				prfx += part;
				if (max < part.length) {
					max = part.length;
				}
			}
		}

		let current = this.lines[line - 1]
			.replace(styleRgxp, '  ')
			.replace(privateRgxp, '')
			.replace(cutRgxp, '$1');

		let part = `> ${line} ${current}`;
		let sep = new Array(
				Math.max(max, part.length) || 5
		).join('-');

		str += nl + sep + prfx + nl + part + nl + sep;
	}

	return str;
};

/**
 * @private
 * @type {?boolean}
 */
DirObj.prototype._error = null;

/**
 * Генерировать заданную ошибку
 * @param {string} msg - сообщение ошибки
 */
DirObj.prototype.error = function (msg) {
	if (this._error) {
		return;
	}

	this._error = true;
	var report = `${msg}, ${this.genErrorAdvInfo()}`,
		error = new Error(report);

	error.name = 'SnakeskinError';
	this.brk = true;

	if (this.proto) {
		this.parent.brk = true;
	}

	if (this.onError) {
		this.onError(error);

	} else {
		if (typeof console === 'undefined' || typeof console.error !== 'function' || this.throws) {
			throw error;
		}

		console.error(`SnakeskinError: ${report}`);
	}
};