| // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file |
| // for details. All rights reserved. Use of this source code is governed by a |
| // BSD-style license that can be found in the LICENSE file. |
| |
| part of html; |
| |
| abstract class CssClassSet implements Set<String> { |
| |
| String toString() { |
| return Strings.join(new List.from(readClasses()), ' '); |
| } |
| |
| /** |
| * Adds the class [token] to the element if it is not on it, removes it if it |
| * is. |
| */ |
| bool toggle(String value) { |
| Set<String> s = readClasses(); |
| bool result = false; |
| if (s.contains(value)) { |
| s.remove(value); |
| } else { |
| s.add(value); |
| result = true; |
| } |
| writeClasses(s); |
| return result; |
| } |
| |
| /** |
| * Returns [:true:] if classes cannot be added or removed from this |
| * [:CssClassSet:]. |
| */ |
| bool get frozen => false; |
| |
| // interface Iterable - BEGIN |
| Iterator<String> get iterator => readClasses().iterator; |
| // interface Iterable - END |
| |
| // interface Collection - BEGIN |
| void forEach(void f(String element)) { |
| readClasses().forEach(f); |
| } |
| |
| String join([String separator]) => readClasses().join(separator); |
| |
| Iterable map(f(String element)) => readClasses().map(f); |
| |
| Iterable mappedBy(f(String element)) => readClasses().mappedBy(f); |
| |
| Iterable<String> where(bool f(String element)) => readClasses().where(f); |
| |
| bool every(bool f(String element)) => readClasses().every(f); |
| |
| bool any(bool f(String element)) => readClasses().any(f); |
| |
| bool get isEmpty => readClasses().isEmpty; |
| |
| int get length =>readClasses().length; |
| |
| dynamic reduce(dynamic initialValue, |
| dynamic combine(dynamic previousValue, String element)) { |
| return readClasses().reduce(initialValue, combine); |
| } |
| // interface Collection - END |
| |
| // interface Set - BEGIN |
| bool contains(String value) => readClasses().contains(value); |
| |
| void add(String value) { |
| // TODO - figure out if we need to do any validation here |
| // or if the browser natively does enough. |
| _modify((s) => s.add(value)); |
| } |
| |
| bool remove(Object value) { |
| if (value is! String) return false; |
| Set<String> s = readClasses(); |
| bool result = s.remove(value); |
| writeClasses(s); |
| return result; |
| } |
| |
| void addAll(Iterable<String> iterable) { |
| // TODO - see comment above about validation. |
| _modify((s) => s.addAll(iterable)); |
| } |
| |
| void removeAll(Iterable<String> iterable) { |
| _modify((s) => s.removeAll(iterable)); |
| } |
| |
| void retainAll(Iterable<String> iterable) { |
| _modify((s) => s.retainAll(iterable)); |
| } |
| |
| void removeMatching(bool test(String name)) { |
| _modify((s) => s.removeMatching(test)); |
| } |
| |
| void retainMatching(bool test(String name)) { |
| _modify((s) => s.retainMatching(test)); |
| } |
| |
| bool isSubsetOf(Collection<String> collection) => |
| readClasses().isSubsetOf(collection); |
| |
| bool containsAll(Collection<String> collection) => |
| readClasses().containsAll(collection); |
| |
| Set<String> intersection(Collection<String> other) => |
| readClasses().intersection(other); |
| |
| String get first => readClasses().first; |
| String get last => readClasses().last; |
| String get single => readClasses().single; |
| List<String> toList() => readClasses().toList(); |
| Set<String> toSet() => readClasses().toSet(); |
| String min([int compare(String a, String b)]) => |
| readClasses().min(compare); |
| String max([int compare(String a, String b)]) => |
| readClasses().max(compare); |
| Iterable<String> take(int n) => readClasses().take(n); |
| Iterable<String> takeWhile(bool test(String value)) => |
| readClasses().takeWhile(test); |
| Iterable<String> skip(int n) => readClasses().skip(n); |
| Iterable<String> skipWhile(bool test(String value)) => |
| readClasses().skipWhile(test); |
| String firstMatching(bool test(String value), { String orElse() }) => |
| readClasses().firstMatching(test, orElse: orElse); |
| String lastMatching(bool test(String value), {String orElse()}) => |
| readClasses().lastMatching(test, orElse: orElse); |
| String singleMatching(bool test(String value)) => |
| readClasses().singleMatching(test); |
| String elementAt(int index) => readClasses().elementAt(index); |
| |
| void clear() { |
| _modify((s) => s.clear()); |
| } |
| // interface Set - END |
| |
| /** |
| * Helper method used to modify the set of css classes on this element. |
| * |
| * f - callback with: |
| * s - a Set of all the css class name currently on this element. |
| * |
| * After f returns, the modified set is written to the |
| * className property of this element. |
| */ |
| void _modify( f(Set<String> s)) { |
| Set<String> s = readClasses(); |
| f(s); |
| writeClasses(s); |
| } |
| |
| /** |
| * Read the class names from the Element class property, |
| * and put them into a set (duplicates are discarded). |
| * This is intended to be overridden by specific implementations. |
| */ |
| Set<String> readClasses(); |
| |
| /** |
| * Join all the elements of a set into one string and write |
| * back to the element. |
| * This is intended to be overridden by specific implementations. |
| */ |
| void writeClasses(Set<String> s); |
| } |