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/CheckedRadioButtons.h"
26 #include "wtf/Forward.h"
27 #include "wtf/ListHashSet.h"
28 #include "wtf/Vector.h"
29 #include "wtf/text/AtomicStringHash.h"
30
31 namespace WebCore {
32
33 class FormAssociatedElement;
34 class FormKeyGenerator;
35 class HTMLFormControlElementWithState;
36 class HTMLFormElement;
37 class SavedFormState;
38
39 class FormControlState {
40 public:
FormControlState()41 FormControlState() : m_type(TypeSkip) { }
FormControlState(const String & value)42 explicit FormControlState(const String& value) : m_type(TypeRestore) { m_values.append(value); }
43 static FormControlState deserialize(const Vector<String>& stateVector, size_t& index);
FormControlState(const FormControlState & another)44 FormControlState(const FormControlState& another) : m_type(another.m_type), m_values(another.m_values) { }
45 FormControlState& operator=(const FormControlState&);
46
isFailure()47 bool isFailure() const { return m_type == TypeFailure; }
valueSize()48 size_t valueSize() const { return m_values.size(); }
49 const String& operator[](size_t i) const { return m_values[i]; }
50 void append(const String&);
51 void serializeTo(Vector<String>& stateVector) const;
52
53 private:
54 enum Type { TypeSkip, TypeRestore, TypeFailure };
FormControlState(Type type)55 explicit FormControlState(Type type) : m_type(type) { }
56
57 Type m_type;
58 Vector<String> m_values;
59 };
60
61 inline FormControlState& FormControlState::operator=(const FormControlState& another)
62 {
63 m_type = another.m_type;
64 m_values = another.m_values;
65 return *this;
66 }
67
append(const String & value)68 inline void FormControlState::append(const String& value)
69 {
70 m_type = TypeRestore;
71 m_values.append(value);
72 }
73
74 class FormController {
75 WTF_MAKE_FAST_ALLOCATED;
76 public:
create()77 static PassOwnPtr<FormController> create()
78 {
79 return adoptPtr(new FormController);
80 }
81 ~FormController();
82
checkedRadioButtons()83 CheckedRadioButtons& checkedRadioButtons() { return m_checkedRadioButtons; }
84
85 void registerFormElementWithState(HTMLFormControlElementWithState*);
86 void unregisterFormElementWithState(HTMLFormControlElementWithState*);
87 // This should be callled only by Document::formElementsState().
88 Vector<String> formElementsState() const;
89 // This should be callled only by Document::setStateForNewFormElements().
90 void setStateForNewFormElements(const Vector<String>&);
91 void willDeleteForm(HTMLFormElement*);
92 void restoreControlStateFor(HTMLFormControlElementWithState&);
93 void restoreControlStateIn(HTMLFormElement&);
94
95 static Vector<String> getReferencedFilePaths(const Vector<String>& stateVector);
96
97 private:
98 typedef ListHashSet<RefPtr<HTMLFormControlElementWithState>, 64> FormElementListHashSet;
99 typedef HashMap<AtomicString, OwnPtr<SavedFormState> > SavedFormStateMap;
100
101 FormController();
102 static PassOwnPtr<SavedFormStateMap> createSavedFormStateMap(const FormElementListHashSet&);
103 FormControlState takeStateForFormElement(const HTMLFormControlElementWithState&);
104 static void formStatesFromStateVector(const Vector<String>&, SavedFormStateMap&);
105
106 CheckedRadioButtons m_checkedRadioButtons;
107 FormElementListHashSet m_formElementsWithState;
108 SavedFormStateMap m_savedFormStateMap;
109 OwnPtr<FormKeyGenerator> m_formKeyGenerator;
110 };
111
112 } // namespace WebCore
113 #endif
114