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449f4a6673
* Update project.pbxproj files to say Flutter rather than Chromium Also, the templates now have an empty organization so that we don't cause people to give their apps a Flutter copyright. * Update the copyright notice checker to require a standard notice on all files * Update copyrights on Dart files. (This was a mechanical commit.) * Fix weird license headers on Dart files that deviate from our conventions; relicense Shrine. Some were already marked "The Flutter Authors", not clear why. Their dates have been normalized. Some were missing the blank line after the license. Some were randomly different in trivial ways for no apparent reason (e.g. missing the trailing period). * Clean up the copyrights in non-Dart files. (Manual edits.) Also, make sure templates don't have copyrights. * Fix some more ORGANIZATIONNAMEs
357 lines
9.7 KiB
Dart
357 lines
9.7 KiB
Dart
// Copyright 2014 The Flutter Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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import 'package:flutter/material.dart';
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import 'package:string_scanner/string_scanner.dart';
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class SyntaxHighlighterStyle {
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SyntaxHighlighterStyle({
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this.baseStyle,
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this.numberStyle,
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this.commentStyle,
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this.keywordStyle,
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this.stringStyle,
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this.punctuationStyle,
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this.classStyle,
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this.constantStyle,
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});
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static SyntaxHighlighterStyle lightThemeStyle() {
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return SyntaxHighlighterStyle(
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baseStyle: const TextStyle(color: Color(0xFF000000)),
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numberStyle: const TextStyle(color: Color(0xFF1565C0)),
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commentStyle: const TextStyle(color: Color(0xFF9E9E9E)),
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keywordStyle: const TextStyle(color: Color(0xFF9C27B0)),
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stringStyle: const TextStyle(color: Color(0xFF43A047)),
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punctuationStyle: const TextStyle(color: Color(0xFF000000)),
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classStyle: const TextStyle(color: Color(0xFF512DA8)),
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constantStyle: const TextStyle(color: Color(0xFF795548)),
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);
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}
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static SyntaxHighlighterStyle darkThemeStyle() {
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return SyntaxHighlighterStyle(
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baseStyle: const TextStyle(color: Color(0xFFFFFFFF)),
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numberStyle: const TextStyle(color: Color(0xFF1565C0)),
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commentStyle: const TextStyle(color: Color(0xFF9E9E9E)),
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keywordStyle: const TextStyle(color: Color(0xFF80CBC4)),
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stringStyle: const TextStyle(color: Color(0xFF009688)),
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punctuationStyle: const TextStyle(color: Color(0xFFFFFFFF)),
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classStyle: const TextStyle(color: Color(0xFF009688)),
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constantStyle: const TextStyle(color: Color(0xFF795548)),
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);
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}
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final TextStyle baseStyle;
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final TextStyle numberStyle;
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final TextStyle commentStyle;
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final TextStyle keywordStyle;
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final TextStyle stringStyle;
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final TextStyle punctuationStyle;
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final TextStyle classStyle;
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final TextStyle constantStyle;
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}
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abstract class SyntaxHighlighter {
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TextSpan format(String src);
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}
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class DartSyntaxHighlighter extends SyntaxHighlighter {
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DartSyntaxHighlighter([this._style]) {
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_spans = <_HighlightSpan>[];
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_style ??= SyntaxHighlighterStyle.darkThemeStyle();
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}
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SyntaxHighlighterStyle _style;
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static const List<String> _keywords = <String>[
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'abstract', 'as', 'assert', 'async', 'await', 'break', 'case', 'catch',
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'class', 'const', 'continue', 'default', 'deferred', 'do', 'dynamic', 'else',
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'enum', 'export', 'external', 'extends', 'factory', 'false', 'final',
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'finally', 'for', 'get', 'if', 'implements', 'import', 'in', 'is', 'library',
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'new', 'null', 'operator', 'part', 'rethrow', 'return', 'set', 'static',
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'super', 'switch', 'sync', 'this', 'throw', 'true', 'try', 'typedef', 'var',
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'void', 'while', 'with', 'yield',
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];
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static const List<String> _builtInTypes = <String>[
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'int', 'double', 'num', 'bool',
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];
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String _src;
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StringScanner _scanner;
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List<_HighlightSpan> _spans;
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@override
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TextSpan format(String src) {
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_src = src;
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_scanner = StringScanner(_src);
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if (_generateSpans()) {
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// Successfully parsed the code
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final List<TextSpan> formattedText = <TextSpan>[];
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int currentPosition = 0;
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for (_HighlightSpan span in _spans) {
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if (currentPosition != span.start)
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formattedText.add(TextSpan(text: _src.substring(currentPosition, span.start)));
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formattedText.add(TextSpan(style: span.textStyle(_style), text: span.textForSpan(_src)));
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currentPosition = span.end;
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}
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if (currentPosition != _src.length)
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formattedText.add(TextSpan(text: _src.substring(currentPosition, _src.length)));
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return TextSpan(style: _style.baseStyle, children: formattedText);
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} else {
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// Parsing failed, return with only basic formatting
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return TextSpan(style: _style.baseStyle, text: src);
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}
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}
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bool _generateSpans() {
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int lastLoopPosition = _scanner.position;
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while (!_scanner.isDone) {
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// Skip White space
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_scanner.scan(RegExp(r'\s+'));
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// Block comments
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if (_scanner.scan(RegExp(r'/\*(.|\n)*\*/'))) {
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_spans.add(_HighlightSpan(
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_HighlightType.comment,
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_scanner.lastMatch.start,
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_scanner.lastMatch.end,
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));
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continue;
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}
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// Line comments
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if (_scanner.scan('//')) {
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final int startComment = _scanner.lastMatch.start;
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bool eof = false;
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int endComment;
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if (_scanner.scan(RegExp(r'.*\n'))) {
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endComment = _scanner.lastMatch.end - 1;
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} else {
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eof = true;
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endComment = _src.length;
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}
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_spans.add(_HighlightSpan(
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_HighlightType.comment,
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startComment,
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endComment,
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));
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if (eof)
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break;
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continue;
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}
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// Raw r"String"
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if (_scanner.scan(RegExp(r'r".*"'))) {
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_spans.add(_HighlightSpan(
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_HighlightType.string,
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_scanner.lastMatch.start,
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_scanner.lastMatch.end,
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));
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continue;
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}
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// Raw r'String'
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if (_scanner.scan(RegExp(r"r'.*'"))) {
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_spans.add(_HighlightSpan(
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_HighlightType.string,
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_scanner.lastMatch.start,
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_scanner.lastMatch.end,
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));
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continue;
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}
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// Multiline """String"""
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if (_scanner.scan(RegExp(r'"""(?:[^"\\]|\\(.|\n))*"""'))) {
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_spans.add(_HighlightSpan(
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_HighlightType.string,
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_scanner.lastMatch.start,
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_scanner.lastMatch.end,
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));
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continue;
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}
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// Multiline '''String'''
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if (_scanner.scan(RegExp(r"'''(?:[^'\\]|\\(.|\n))*'''"))) {
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_spans.add(_HighlightSpan(
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_HighlightType.string,
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_scanner.lastMatch.start,
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_scanner.lastMatch.end,
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));
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continue;
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}
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// "String"
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if (_scanner.scan(RegExp(r'"(?:[^"\\]|\\.)*"'))) {
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_spans.add(_HighlightSpan(
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_HighlightType.string,
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_scanner.lastMatch.start,
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_scanner.lastMatch.end,
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));
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continue;
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}
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// 'String'
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if (_scanner.scan(RegExp(r"'(?:[^'\\]|\\.)*'"))) {
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_spans.add(_HighlightSpan(
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_HighlightType.string,
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_scanner.lastMatch.start,
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_scanner.lastMatch.end,
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));
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continue;
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}
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// Double
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if (_scanner.scan(RegExp(r'\d+\.\d+'))) {
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_spans.add(_HighlightSpan(
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_HighlightType.number,
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_scanner.lastMatch.start,
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_scanner.lastMatch.end,
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));
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continue;
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}
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// Integer
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if (_scanner.scan(RegExp(r'\d+'))) {
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_spans.add(_HighlightSpan(
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_HighlightType.number,
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_scanner.lastMatch.start,
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_scanner.lastMatch.end)
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);
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continue;
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}
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// Punctuation
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if (_scanner.scan(RegExp(r'[\[\]{}().!=<>&\|\?\+\-\*/%\^~;:,]'))) {
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_spans.add(_HighlightSpan(
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_HighlightType.punctuation,
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_scanner.lastMatch.start,
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_scanner.lastMatch.end,
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));
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continue;
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}
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// Meta data
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if (_scanner.scan(RegExp(r'@\w+'))) {
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_spans.add(_HighlightSpan(
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_HighlightType.keyword,
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_scanner.lastMatch.start,
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_scanner.lastMatch.end,
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));
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continue;
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}
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// Words
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if (_scanner.scan(RegExp(r'\w+'))) {
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_HighlightType type;
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String word = _scanner.lastMatch[0];
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if (word.startsWith('_'))
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word = word.substring(1);
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if (_keywords.contains(word))
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type = _HighlightType.keyword;
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else if (_builtInTypes.contains(word))
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type = _HighlightType.keyword;
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else if (_firstLetterIsUpperCase(word))
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type = _HighlightType.klass;
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else if (word.length >= 2 && word.startsWith('k') && _firstLetterIsUpperCase(word.substring(1)))
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type = _HighlightType.constant;
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if (type != null) {
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_spans.add(_HighlightSpan(
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type,
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_scanner.lastMatch.start,
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_scanner.lastMatch.end,
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));
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}
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}
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// Check if this loop did anything
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if (lastLoopPosition == _scanner.position) {
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// Failed to parse this file, abort gracefully
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return false;
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}
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lastLoopPosition = _scanner.position;
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}
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_simplify();
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return true;
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}
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void _simplify() {
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for (int i = _spans.length - 2; i >= 0; i -= 1) {
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if (_spans[i].type == _spans[i + 1].type && _spans[i].end == _spans[i + 1].start) {
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_spans[i] = _HighlightSpan(
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_spans[i].type,
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_spans[i].start,
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_spans[i + 1].end,
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);
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_spans.removeAt(i + 1);
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}
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}
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}
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bool _firstLetterIsUpperCase(String str) {
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if (str.isNotEmpty) {
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final String first = str.substring(0, 1);
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return first == first.toUpperCase();
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}
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return false;
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}
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}
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enum _HighlightType {
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number,
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comment,
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keyword,
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string,
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punctuation,
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klass,
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constant
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}
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class _HighlightSpan {
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_HighlightSpan(this.type, this.start, this.end);
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final _HighlightType type;
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final int start;
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final int end;
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String textForSpan(String src) {
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return src.substring(start, end);
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}
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TextStyle textStyle(SyntaxHighlighterStyle style) {
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if (type == _HighlightType.number)
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return style.numberStyle;
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else if (type == _HighlightType.comment)
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return style.commentStyle;
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else if (type == _HighlightType.keyword)
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return style.keywordStyle;
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else if (type == _HighlightType.string)
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return style.stringStyle;
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else if (type == _HighlightType.punctuation)
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return style.punctuationStyle;
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else if (type == _HighlightType.klass)
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return style.classStyle;
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else if (type == _HighlightType.constant)
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return style.constantStyle;
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else
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return style.baseStyle;
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}
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}
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