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// Copyright 2014 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Regenerates the material icons file.
// See https://github.com/flutter/flutter/wiki/Updating-Material-Design-Fonts-&-Icons
import 'dart:collection';
import 'dart:convert' show LineSplitter;
import 'dart:io';
import 'package:args/args.dart';
import 'package:path/path.dart' as path;
const String _newCodepointsPathOption = 'new-codepoints';
const String _oldCodepointsPathOption = 'old-codepoints';
const String _iconsClassPathOption = 'icons';
const String _dryRunOption = 'dry-run';
const String _defaultNewCodepointsPath = 'codepoints';
const String _defaultOldCodepointsPath = 'bin/cache/artifacts/material_fonts/codepoints';
const String _defaultIconsPath = 'packages/flutter/lib/src/material/icons.dart';
const String _beginGeneratedMark = '// BEGIN GENERATED ICONS';
const String _endGeneratedMark = '// END GENERATED ICONS';
const String _beginPlatformAdaptiveGeneratedMark = '// BEGIN GENERATED PLATFORM ADAPTIVE ICONS';
const String _endPlatformAdaptiveGeneratedMark = '// END GENERATED PLATFORM ADAPTIVE ICONS';
const Map<String, List<String>> _platformAdaptiveIdentifiers = <String, List<String>>{
// Mapping of Flutter IDs to an Android/agnostic ID and an iOS ID.
// Flutter IDs can be anything, but should be chosen to be agnostic.
'arrow_back': <String>['arrow_back', 'arrow_back_ios'],
'arrow_forward': <String>['arrow_forward', 'arrow_forward_ios'],
'flip_camera': <String>['flip_camera_android', 'flip_camera_ios'],
'more': <String>['more_vert', 'more_horiz'],
'share': <String>['share', 'ios_share'],
};
// Rewrite certain Flutter IDs (numbers) using prefix matching.
const Map<String, String> identifierPrefixRewrites = <String, String>{
'_1': 'one_',
'_2': 'two_',
'_3': 'three_',
'_4': 'four_',
'_5': 'five_',
'_6': 'six_',
'_7': 'seven_',
'_8': 'eight_',
'_9': 'nine_',
'_10': 'ten_',
'_11': 'eleven_',
'_12': 'twelve_',
'_13': 'thirteen_',
'_14': 'fourteen_',
'_15': 'fifteen_',
'_16': 'sixteen_',
'_17': 'seventeen_',
'_18': 'eighteen_',
'_19': 'nineteen_',
'_20': 'twenty_',
'_21': 'twenty_one_',
'_22': 'twenty_two_',
'_23': 'twenty_three_',
'_24': 'twenty_four_',
'_30': 'thirty_',
'_60': 'sixty_',
'_360': 'threesixty',
'_2d': 'twod',
'_3d': 'threed',
'_3d_rotation': 'threed_rotation',
};
// Rewrite certain Flutter IDs (reserved keywords) using exact matching.
const Map<String, String> identifierExactRewrites = <String, String>{
'class': 'class_',
'new': 'new_',
'switch': 'switch_',
'try': 'try_sms_star',
'door_back': 'door_back_door',
'door_front': 'door_front_door',
};
const Set<String> _iconsMirroredWhenRTL = <String>{
// This list is obtained from:
// http://google.github.io/material-design-icons/#icons-in-rtl
'arrow_back',
'arrow_back_ios',
'arrow_forward',
'arrow_forward_ios',
'arrow_left',
'arrow_right',
'assignment',
'assignment_return',
'backspace',
'battery_unknown',
'call_made',
'call_merge',
'call_missed',
'call_missed_outgoing',
'call_received',
'call_split',
'chevron_left',
'chevron_right',
'chrome_reader_mode',
'device_unknown',
'dvr',
'event_note',
'featured_play_list',
'featured_video',
'first_page',
'flight_land',
'flight_takeoff',
'format_indent_decrease',
'format_indent_increase',
'format_list_bulleted',
'forward',
'functions',
'help',
'help_outline',
'input',
'keyboard_backspace',
'keyboard_tab',
'label',
'label_important',
'label_outline',
'last_page',
'launch',
'list',
'live_help',
'mobile_screen_share',
'multiline_chart',
'navigate_before',
'navigate_next',
'next_week',
'note',
'open_in_new',
'playlist_add',
'queue_music',
'redo',
'reply',
'reply_all',
'screen_share',
'send',
'short_text',
'show_chart',
'sort',
'star_half',
'subject',
'trending_flat',
'toc',
'trending_down',
'trending_up',
'undo',
'view_list',
'view_quilt',
'wrap_text',
};
void main(List<String> args) {
// If we're run from the `tools` dir, set the cwd to the repo root.
if (path.basename(Directory.current.path) == 'tools')
Directory.current = Directory.current.parent.parent;
final ArgResults argResults = _handleArguments(args);
final File iconClassFile = File(path.normalize(path.absolute(argResults[_iconsClassPathOption] as String)));
if (!iconClassFile.existsSync()) {
stderr.writeln('Error: Icons file not found: ${iconClassFile.path}');
exit(1);
}
final File newCodepointsFile = File(argResults[_newCodepointsPathOption] as String);
if (!newCodepointsFile.existsSync()) {
stderr.writeln('Error: New codepoints file not found: ${newCodepointsFile.path}');
exit(1);
}
final File oldCodepointsFile = File(argResults[_oldCodepointsPathOption] as String);
if (!oldCodepointsFile.existsSync()) {
stderr.writeln('Error: Old codepoints file not found: ${oldCodepointsFile.path}');
exit(1);
}
final String newCodepointsString = newCodepointsFile.readAsStringSync();
final Map<String, String> newTokenPairMap = _stringToTokenPairMap(newCodepointsString);
final String oldCodepointsString = oldCodepointsFile.readAsStringSync();
final Map<String, String> oldTokenPairMap = _stringToTokenPairMap(oldCodepointsString);
_testIsMapSuperset(newTokenPairMap, oldTokenPairMap);
final String iconClassFileData = iconClassFile.readAsStringSync();
stderr.writeln('Generating icons file...');
final String newIconData = _regenerateIconsFile(iconClassFileData, newTokenPairMap);
if (argResults[_dryRunOption] as bool) {
stdout.write(newIconData);
} else {
stderr.writeln('\nWriting to ${iconClassFile.path}.');
iconClassFile.writeAsStringSync(newIconData);
_regenerateCodepointsFile(oldCodepointsFile, newTokenPairMap);
}
}
ArgResults _handleArguments(List<String> args) {
final ArgParser argParser = ArgParser()
..addOption(_newCodepointsPathOption,
defaultsTo: _defaultNewCodepointsPath,
help: 'Location of the new codepoints directory')
..addOption(_oldCodepointsPathOption,
defaultsTo: _defaultOldCodepointsPath,
help: 'Location of the existing codepoints directory')
..addOption(_iconsClassPathOption,
defaultsTo: _defaultIconsPath,
help: 'Location of the material icons file')
..addFlag(_dryRunOption, defaultsTo: false);
argParser.addFlag('help', abbr: 'h', negatable: false, callback: (bool help) {
if (help) {
print(argParser.usage);
exit(1);
}
});
return argParser.parse(args);
}
Map<String, String> _stringToTokenPairMap(String codepointData) {
final Iterable<String> cleanData = LineSplitter.split(codepointData)
.map((String line) => line.trim())
.where((String line) => line.isNotEmpty);
final Map<String, String> pairs = <String,String>{};
for (final String line in cleanData) {
final List<String> tokens = line.split(' ');
if (tokens.length != 2) {
throw FormatException('Unexpected codepoint data: $line');
}
pairs.putIfAbsent(tokens[0], () => tokens[1]);
}
return pairs;
}
String _regenerateIconsFile(String iconData, Map<String, String> tokenPairMap) {
final List<_Icon> newIcons = tokenPairMap.entries
.map((MapEntry<String, String> entry) => _Icon(entry))
.toList();
newIcons.sort((_Icon a, _Icon b) => a._compareTo(b));
final StringBuffer buf = StringBuffer();
bool generating = false;
for (final String line in LineSplitter.split(iconData)) {
if (!generating) {
buf.writeln(line);
}
// Generate for _PlatformAdaptiveIcons
if (line.contains(_beginPlatformAdaptiveGeneratedMark)) {
generating = true;
final List<String> platformAdaptiveDeclarations = <String>[];
_platformAdaptiveIdentifiers.forEach((String flutterId, List<String> ids) {
// Automatically finds and generates styled icon declarations.
for (final String style in <String>['', '_outlined', '_rounded', '_sharp']) {
try {
final _Icon agnosticIcon = newIcons.firstWhere(
(_Icon icon) => icon.id == '${ids[0]}$style',
orElse: () => throw ids[0]);
final _Icon iOSIcon = newIcons.firstWhere(
(_Icon icon) => icon.id == '${ids[1]}$style',
orElse: () => throw ids[1]);
platformAdaptiveDeclarations.add(_Icon.platformAdaptiveDeclaration('$flutterId$style', agnosticIcon, iOSIcon));
} catch (e) {
if (style == '') {
// Throw an error for regular (unstyled) icons.
stderr.writeln("Error while generating platformAdaptiveDeclarations: Icon '$e' not found.");
exit(1);
} else {
// Ignore errors for styled icons since some don't exist.
}
}
}
});
buf.write(platformAdaptiveDeclarations.join());
} else if (line.contains(_endPlatformAdaptiveGeneratedMark)) {
generating = false;
buf.writeln(line);
}
// Generate for Icons
if (line.contains(_beginGeneratedMark)) {
generating = true;
final String iconDeclarationsString = newIcons.map((_Icon icon) => icon.fullDeclaration).join('');
buf.write(iconDeclarationsString);
} else if (line.contains(_endGeneratedMark)) {
generating = false;
buf.writeln(line);
}
}
return buf.toString();
}
void _testIsMapSuperset(Map<String, String> newCodepoints, Map<String, String> oldCodepoints) {
final Set<String> newCodepointsSet = newCodepoints.keys.toSet();
final Set<String> oldCodepointsSet = oldCodepoints.keys.toSet();
if (!newCodepointsSet.containsAll(oldCodepointsSet)) {
stderr.writeln('''
Error: New codepoints file does not contain all ${oldCodepointsSet.length} existing codepoints.\n
Missing: ${oldCodepointsSet.difference(newCodepointsSet)}
''',
);
exit(1);
} else {
final int diff = newCodepointsSet.length - oldCodepointsSet.length;
stderr.writeln('New codepoints file contains all ${oldCodepointsSet.length} existing codepoints.');
if (diff > 0) {
stderr.writeln('It also contains $diff new codepoints: ${newCodepointsSet.difference(oldCodepointsSet)}');
}
}
}
void _regenerateCodepointsFile(File oldCodepointsFile, Map<String, String> newTokenPairMap) {
stderr.writeln('Regenerating old codepoints file ${oldCodepointsFile.path}.\n');
final StringBuffer buf = StringBuffer();
final SplayTreeMap<String, String> sortedNewTokenPairMap = SplayTreeMap<String, String>.of(newTokenPairMap);
sortedNewTokenPairMap.forEach((String key, String value) => buf.writeln('$key $value'));
oldCodepointsFile.writeAsStringSync(buf.toString());
}
class _Icon {
// Parse tokenPair (e.g. {"6_ft_apart_outlined": "e004"}).
_Icon(MapEntry<String, String> tokenPair) {
id = tokenPair.key;
hexCodepoint = tokenPair.value;
// Determine family and htmlSuffix.
if (id.endsWith('_gm_outlined')) {
family = 'GM';
htmlSuffix = '-outlined';
} else if (id.endsWith('_gm_filled')) {
family = 'GM';
htmlSuffix = '-filled';
} else if (id.endsWith('_monoline_outlined')) {
family = 'Monoline';
htmlSuffix = '-outlined';
} else if (id.endsWith('_monoline_filled')) {
family = 'Monoline';
htmlSuffix = '-filled';
} else {
family = 'material';
if (id.endsWith('_outlined') && id != 'insert_chart_outlined') {
htmlSuffix = '-outlined';
} else if (id.endsWith('_rounded')) {
htmlSuffix = '-round';
} else if (id.endsWith('_sharp')) {
htmlSuffix = '-sharp';
} else {
htmlSuffix = '';
}
}
shortId = _generateShortId(id);
flutterId = generateFlutterId(id);
}
static const List<String> _idSuffixes = <String>[
'_gm_outlined',
'_gm_filled',
'_monoline_outlined',
'_monoline_filled',
'_outlined',
'_rounded',
'_sharp'
];
late String id; // e.g. 5g, 5g_outlined, 5g_rounded, 5g_sharp
late String shortId; // e.g. 5g
late String flutterId; // e.g. five_g, five_g_outlined, five_g_rounded, five_g_sharp
late String family; // e.g. material
late String hexCodepoint; // e.g. e547
late String htmlSuffix; // The suffix for the 'material-icons' HTML class.
String get name => shortId.replaceAll('_', ' ').trim();
String get style => htmlSuffix == '' ? '' : ' (${htmlSuffix.replaceFirst('-', '')})';
String get dartDoc =>
'<i class="material-icons$htmlSuffix md-36">$shortId</i> &#x2014; $family icon named "$name"$style';
String get mirroredInRTL => _iconsMirroredWhenRTL.contains(shortId)
? ', matchTextDirection: true'
: '';
String get declaration =>
"static const IconData $flutterId = IconData(0x$hexCodepoint, fontFamily: 'MaterialIcons'$mirroredInRTL);";
String get fullDeclaration => '''
/// $dartDoc.
$declaration
''';
static String platformAdaptiveDeclaration(String fullFlutterId, _Icon agnosticIcon, _Icon iOSIcon) => '''
/// Platform-adaptive icon for ${agnosticIcon.dartDoc} and ${iOSIcon.dartDoc}.;
IconData get $fullFlutterId => !_isCupertino() ? Icons.${agnosticIcon.flutterId} : Icons.${iOSIcon.flutterId};
''';
@override
String toString() => id;
/// Analogous to [String.compareTo]
int _compareTo(_Icon b) {
if (shortId == b.shortId) {
// Sort a regular icon before its variants.
return id.length - b.id.length;
}
return shortId.compareTo(b.shortId);
}
static String _replaceLast(String string, String toReplace) {
return string.replaceAll(RegExp('$toReplace\$'), '');
}
static String _generateShortId(String id) {
String shortId = id;
for (final String styleSuffix in _idSuffixes) {
if (styleSuffix == '_outlined' && id == 'insert_chart_outlined')
continue;
shortId = _replaceLast(shortId, styleSuffix);
if (shortId != id) {
break;
}
}
return shortId;
}
/// Given some icon's raw id, returns a valid Dart icon identifier
static String generateFlutterId(String id) {
String flutterId = id;
// Exact identifier rewrites.
for (final MapEntry<String, String> rewritePair
in identifierExactRewrites.entries) {
final String shortId = _Icon._generateShortId(id);
if (shortId == rewritePair.key) {
flutterId = id.replaceFirst(rewritePair.key, identifierExactRewrites[rewritePair.key]!);
}
}
// Prefix identifer rewrites.
for (final MapEntry<String, String> rewritePair
in identifierPrefixRewrites.entries) {
if (id.startsWith(rewritePair.key)) {
flutterId = id.replaceFirst(rewritePair.key, identifierPrefixRewrites[rewritePair.key]!);
}
// TODO(guidezpl): With the next icon update, this won't be necessary, remove it.
if (id.startsWith(rewritePair.key.replaceFirst('_', ''))) {
flutterId = id.replaceFirst(rewritePair.key.replaceFirst('_', ''), identifierPrefixRewrites[rewritePair.key]!);
}
}
return flutterId;
}
}