1 /*
2  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
3  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
4  *           (C) 2000 Dirk Mueller (mueller@kde.org)
5  * Copyright (C) 2004, 2005, 2006, 2007, 2010 Apple Inc. All rights reserved.
6  *
7  * This library is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Library General Public
9  * License as published by the Free Software Foundation; either
10  * version 2 of the License, or (at your option) any later version.
11  *
12  * This library is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15  * Library General Public License for more details.
16  *
17  * You should have received a copy of the GNU Library General Public License
18  * along with this library; see the file COPYING.LIB.  If not, write to
19  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
20  * Boston, MA 02110-1301, USA.
21  *
22  */
23 
24 #ifndef HTMLTextAreaElement_h
25 #define HTMLTextAreaElement_h
26 
27 #include "HTMLFormControlElement.h"
28 
29 namespace WebCore {
30 
31 class BeforeTextInsertedEvent;
32 class VisibleSelection;
33 
34 class HTMLTextAreaElement : public HTMLTextFormControlElement {
35 public:
36     static PassRefPtr<HTMLTextAreaElement> create(const QualifiedName&, Document*, HTMLFormElement*);
37 
cols()38     int cols() const { return m_cols; }
rows()39     int rows() const { return m_rows; }
40 
shouldWrapText()41     bool shouldWrapText() const { return m_wrap != NoWrap; }
42 
43     virtual String value() const;
44     void setValue(const String&);
45     String defaultValue() const;
46     void setDefaultValue(const String&);
textLength()47     int textLength() const { return value().length(); }
48     virtual int maxLength() const;
49     void setMaxLength(int, ExceptionCode&);
valueMissing(const String & value)50     bool valueMissing(const String& value) const { return isRequiredFormControl() && !disabled() && !readOnly() && value.isEmpty(); }
51     bool tooLong(const String&, NeedsToCheckDirtyFlag) const;
52     bool isValidValue(const String&) const;
53 
54     void rendererWillBeDestroyed();
55 
56     void setCols(int);
57     void setRows(int);
58 
59     bool lastChangeWasUserEdit() const;
60 
cacheSelection(int s,int e)61     void cacheSelection(int s, int e) { m_cachedSelectionStart = s; m_cachedSelectionEnd = e; };
62 
63 private:
64     HTMLTextAreaElement(const QualifiedName&, Document*, HTMLFormElement*);
65 
66     enum WrapMethod { NoWrap, SoftWrap, HardWrap };
67 
68     void handleBeforeTextInsertedEvent(BeforeTextInsertedEvent*) const;
69     static String sanitizeUserInputValue(const String&, unsigned maxLength);
70     void updateValue() const;
71     void setNonDirtyValue(const String&);
72     void setValueCommon(const String&);
73 
supportsPlaceholder()74     virtual bool supportsPlaceholder() const { return true; }
isEmptyValue()75     virtual bool isEmptyValue() const { return value().isEmpty(); }
cachedSelectionStart()76     virtual int cachedSelectionStart() const { return m_cachedSelectionStart; }
cachedSelectionEnd()77     virtual int cachedSelectionEnd() const { return m_cachedSelectionEnd; }
78 
isOptionalFormControl()79     virtual bool isOptionalFormControl() const { return !isRequiredFormControl(); }
isRequiredFormControl()80     virtual bool isRequiredFormControl() const { return required(); }
81 
82     virtual void defaultEventHandler(Event*);
83 
isEnumeratable()84     virtual bool isEnumeratable() const { return true; }
85 
86     virtual const AtomicString& formControlType() const;
87 
88     virtual bool saveFormControlState(String& value) const;
89     virtual void restoreFormControlState(const String&);
90 
isTextFormControl()91     virtual bool isTextFormControl() const { return true; }
92 
93     virtual void childrenChanged(bool changedByParser = false, Node* beforeChange = 0, Node* afterChange = 0, int childCountDelta = 0);
94     virtual void parseMappedAttribute(Attribute*);
95     virtual RenderObject* createRenderer(RenderArena*, RenderStyle*);
96     virtual bool appendFormData(FormDataList&, bool);
97     virtual void reset();
98     virtual bool isMouseFocusable() const;
99     virtual bool isKeyboardFocusable(KeyboardEvent*) const;
100     virtual void updateFocusAppearance(bool restorePreviousSelection);
101 
102     virtual void accessKeyAction(bool sendToAnyElement);
103 
104     virtual bool shouldUseInputMethod() const;
105 
106     int m_rows;
107     int m_cols;
108     WrapMethod m_wrap;
109     mutable String m_value;
110     int m_cachedSelectionStart;
111     int m_cachedSelectionEnd;
112     mutable bool m_isDirty;
113 };
114 
115 } //namespace
116 
117 #endif
118