137 lines
5.0 KiB
Plaintext
137 lines
5.0 KiB
Plaintext
/*---------------------------------------------------------------------------------------------
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* Copyright (c) Microsoft Corporation. All rights reserved.
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* Licensed under the MIT License. See License.txt in the project root for license information.
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*--------------------------------------------------------------------------------------------*/
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import { Range, Position } from '../cssLanguageTypes';
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import { css_beautify } from '../beautify/beautify-css';
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import { repeat } from '../utils/strings';
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export function format(document, range, options) {
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let value = document.getText();
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let includesEnd = true;
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let initialIndentLevel = 0;
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let inRule = false;
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const tabSize = options.tabSize || 4;
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if (range) {
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let startOffset = document.offsetAt(range.start);
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// include all leading whitespace iff at the beginning of the line
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let extendedStart = startOffset;
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while (extendedStart > 0 && isWhitespace(value, extendedStart - 1)) {
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extendedStart--;
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}
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if (extendedStart === 0 || isEOL(value, extendedStart - 1)) {
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startOffset = extendedStart;
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}
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else {
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// else keep at least one whitespace
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if (extendedStart < startOffset) {
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startOffset = extendedStart + 1;
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}
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}
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// include all following whitespace until the end of the line
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let endOffset = document.offsetAt(range.end);
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let extendedEnd = endOffset;
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while (extendedEnd < value.length && isWhitespace(value, extendedEnd)) {
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extendedEnd++;
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}
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if (extendedEnd === value.length || isEOL(value, extendedEnd)) {
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endOffset = extendedEnd;
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}
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range = Range.create(document.positionAt(startOffset), document.positionAt(endOffset));
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// Test if inside a rule
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inRule = isInRule(value, startOffset);
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includesEnd = endOffset === value.length;
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value = value.substring(startOffset, endOffset);
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if (startOffset !== 0) {
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const startOfLineOffset = document.offsetAt(Position.create(range.start.line, 0));
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initialIndentLevel = computeIndentLevel(document.getText(), startOfLineOffset, options);
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}
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if (inRule) {
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value = `{\n${trimLeft(value)}`;
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}
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}
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else {
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range = Range.create(Position.create(0, 0), document.positionAt(value.length));
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}
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const cssOptions = {
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indent_size: tabSize,
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indent_char: options.insertSpaces ? ' ' : '\t',
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end_with_newline: includesEnd && getFormatOption(options, 'insertFinalNewline', false),
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selector_separator_newline: getFormatOption(options, 'newlineBetweenSelectors', true),
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newline_between_rules: getFormatOption(options, 'newlineBetweenRules', true),
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space_around_selector_separator: getFormatOption(options, 'spaceAroundSelectorSeparator', false),
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brace_style: getFormatOption(options, 'braceStyle', 'collapse'),
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indent_empty_lines: getFormatOption(options, 'indentEmptyLines', false),
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max_preserve_newlines: getFormatOption(options, 'maxPreserveNewLines', undefined),
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preserve_newlines: getFormatOption(options, 'preserveNewLines', true),
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wrap_line_length: getFormatOption(options, 'wrapLineLength', undefined),
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eol: '\n'
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};
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let result = css_beautify(value, cssOptions);
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if (inRule) {
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result = trimLeft(result.substring(2));
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}
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if (initialIndentLevel > 0) {
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const indent = options.insertSpaces ? repeat(' ', tabSize * initialIndentLevel) : repeat('\t', initialIndentLevel);
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result = result.split('\n').join('\n' + indent);
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if (range.start.character === 0) {
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result = indent + result; // keep the indent
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}
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}
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return [{
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range: range,
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newText: result
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}];
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}
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function trimLeft(str) {
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return str.replace(/^\s+/, '');
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}
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const _CUL = '{'.charCodeAt(0);
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const _CUR = '}'.charCodeAt(0);
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function isInRule(str, offset) {
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while (offset >= 0) {
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const ch = str.charCodeAt(offset);
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if (ch === _CUL) {
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return true;
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}
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else if (ch === _CUR) {
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return false;
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}
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offset--;
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}
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return false;
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}
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function getFormatOption(options, key, dflt) {
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if (options && options.hasOwnProperty(key)) {
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const value = options[key];
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if (value !== null) {
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return value;
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}
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}
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return dflt;
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}
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function computeIndentLevel(content, offset, options) {
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let i = offset;
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let nChars = 0;
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const tabSize = options.tabSize || 4;
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while (i < content.length) {
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const ch = content.charAt(i);
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if (ch === ' ') {
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nChars++;
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}
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else if (ch === '\t') {
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nChars += tabSize;
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}
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else {
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break;
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}
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i++;
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}
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return Math.floor(nChars / tabSize);
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}
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function isEOL(text, offset) {
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return '\r\n'.indexOf(text.charAt(offset)) !== -1;
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}
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function isWhitespace(text, offset) {
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return ' \t'.indexOf(text.charAt(offset)) !== -1;
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}
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