1/* 2 * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved. 3 * Copyright (C) 2010, 2011, 2012 Google Inc. All rights reserved. 4 * 5 * This library is free software; you can redistribute it and/or 6 * modify it under the terms of the GNU Library General Public 7 * License as published by the Free Software Foundation; either 8 * version 2 of the License, or (at your option) any later version. 9 * 10 * This library is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13 * Library General Public License for more details. 14 * 15 * You should have received a copy of the GNU Library General Public License 16 * along with this library; see the file COPYING.LIB. If not, write to 17 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 18 * Boston, MA 02110-1301, USA. 19 * 20 */ 21 22#ifndef FormController_h 23#define FormController_h 24 25#include "core/html/forms/RadioButtonGroupScope.h" 26#include "platform/heap/Handle.h" 27#include "wtf/Forward.h" 28#include "wtf/ListHashSet.h" 29#include "wtf/Vector.h" 30#include "wtf/text/AtomicStringHash.h" 31 32namespace blink { 33 34class FormAssociatedElement; 35class FormKeyGenerator; 36class HTMLFormControlElementWithState; 37class HTMLFormElement; 38class SavedFormState; 39 40class FormControlState { 41public: 42 FormControlState() : m_type(TypeSkip) { } 43 explicit FormControlState(const String& value) : m_type(TypeRestore) { m_values.append(value); } 44 static FormControlState deserialize(const Vector<String>& stateVector, size_t& index); 45 FormControlState(const FormControlState& another) : m_type(another.m_type), m_values(another.m_values) { } 46 FormControlState& operator=(const FormControlState&); 47 48 bool isFailure() const { return m_type == TypeFailure; } 49 size_t valueSize() const { return m_values.size(); } 50 const String& operator[](size_t i) const { return m_values[i]; } 51 void append(const String&); 52 void serializeTo(Vector<String>& stateVector) const; 53 54private: 55 enum Type { TypeSkip, TypeRestore, TypeFailure }; 56 explicit FormControlState(Type type) : m_type(type) { } 57 58 Type m_type; 59 Vector<String> m_values; 60}; 61 62inline FormControlState& FormControlState::operator=(const FormControlState& another) 63{ 64 m_type = another.m_type; 65 m_values = another.m_values; 66 return *this; 67} 68 69inline void FormControlState::append(const String& value) 70{ 71 m_type = TypeRestore; 72 m_values.append(value); 73} 74 75typedef HashMap<AtomicString, OwnPtr<SavedFormState> > SavedFormStateMap; 76 77class DocumentState FINAL : public RefCountedWillBeGarbageCollected<DocumentState> { 78 DECLARE_EMPTY_DESTRUCTOR_WILL_BE_REMOVED(DocumentState); 79public: 80 static PassRefPtrWillBeRawPtr<DocumentState> create(); 81 void trace(Visitor*); 82 83 void addControl(HTMLFormControlElementWithState*); 84 void removeControl(HTMLFormControlElementWithState*); 85 Vector<String> toStateVector(); 86 87private: 88 typedef WillBeHeapListHashSet<RefPtrWillBeMember<HTMLFormControlElementWithState>, 64> FormElementListHashSet; 89 FormElementListHashSet m_formControls; 90}; 91 92class FormController FINAL : public NoBaseWillBeGarbageCollectedFinalized<FormController> { 93 WTF_MAKE_FAST_ALLOCATED_WILL_BE_REMOVED; 94public: 95 static PassOwnPtrWillBeRawPtr<FormController> create() 96 { 97 return adoptPtrWillBeNoop(new FormController); 98 } 99 ~FormController(); 100 void trace(Visitor*); 101 102 RadioButtonGroupScope& radioButtonGroupScope() { return m_radioButtonGroupScope; } 103 104 void registerStatefulFormControl(HTMLFormControlElementWithState&); 105 void unregisterStatefulFormControl(HTMLFormControlElementWithState&); 106 // This should be callled only by Document::formElementsState(). 107 DocumentState* formElementsState() const; 108 // This should be callled only by Document::setStateForNewFormElements(). 109 void setStateForNewFormElements(const Vector<String>&); 110 void willDeleteForm(HTMLFormElement*); 111 void restoreControlStateFor(HTMLFormControlElementWithState&); 112 void restoreControlStateIn(HTMLFormElement&); 113 114 static Vector<String> getReferencedFilePaths(const Vector<String>& stateVector); 115 116private: 117 FormController(); 118 FormControlState takeStateForFormElement(const HTMLFormControlElementWithState&); 119 static void formStatesFromStateVector(const Vector<String>&, SavedFormStateMap&); 120 121 RadioButtonGroupScope m_radioButtonGroupScope; 122 RefPtrWillBeMember<DocumentState> m_documentState; 123 SavedFormStateMap m_savedFormStateMap; 124 OwnPtrWillBeMember<FormKeyGenerator> m_formKeyGenerator; 125}; 126 127} // namespace blink 128#endif 129