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      1 /*
      2  * Copyright (C) 1999 Lars Knoll (knoll (at) kde.org)
      3  *           (C) 1999 Antti Koivisto (koivisto (at) kde.org)
      4  *           (C) 2000 Dirk Mueller (mueller (at) kde.org)
      5  * Copyright (C) 2004, 2005, 2006, 2007 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     HTMLTextAreaElement(const QualifiedName&, Document*, HTMLFormElement* = 0);
     37 
     38     virtual bool checkDTD(const Node* newChild) { return newChild->isTextNode(); }
     39 
     40     int cols() const { return m_cols; }
     41     int rows() const { return m_rows; }
     42 
     43     bool shouldWrapText() const { return m_wrap != NoWrap; }
     44 
     45     virtual bool isEnumeratable() const { return true; }
     46 
     47     virtual const AtomicString& formControlType() const;
     48 
     49     virtual bool saveFormControlState(String& value) const;
     50     virtual void restoreFormControlState(const String&);
     51 
     52     bool readOnly() const { return isReadOnlyFormControl(); }
     53 
     54     virtual bool isTextFormControl() const { return true; }
     55 
     56     virtual bool valueMissing() const { return isRequiredFormControl() && !disabled() && !readOnly() && value().isEmpty(); }
     57 
     58     virtual void childrenChanged(bool changedByParser = false, Node* beforeChange = 0, Node* afterChange = 0, int childCountDelta = 0);
     59     virtual void parseMappedAttribute(MappedAttribute*);
     60     virtual RenderObject* createRenderer(RenderArena*, RenderStyle*);
     61     virtual bool appendFormData(FormDataList&, bool);
     62     virtual void reset();
     63     virtual void defaultEventHandler(Event*);
     64     virtual bool isMouseFocusable() const;
     65     virtual bool isKeyboardFocusable(KeyboardEvent*) const;
     66     virtual void updateFocusAppearance(bool restorePreviousSelection);
     67 
     68     String value() const;
     69     void setValue(const String&);
     70     String defaultValue() const;
     71     void setDefaultValue(const String&);
     72     int textLength() const { return value().length(); }
     73     int maxLength() const;
     74     void setMaxLength(int, ExceptionCode&);
     75     virtual bool tooLong() const;
     76 
     77     void rendererWillBeDestroyed();
     78 
     79     virtual void accessKeyAction(bool sendToAnyElement);
     80 
     81     const AtomicString& accessKey() const;
     82     void setAccessKey(const String&);
     83 
     84     void setCols(int);
     85     void setRows(int);
     86 
     87     void cacheSelection(int s, int e) { m_cachedSelectionStart = s; m_cachedSelectionEnd = e; };
     88 
     89     virtual bool shouldUseInputMethod() const;
     90 
     91 private:
     92     enum WrapMethod { NoWrap, SoftWrap, HardWrap };
     93 
     94     void handleBeforeTextInsertedEvent(BeforeTextInsertedEvent*) const;
     95     static String sanitizeUserInputValue(const String&, unsigned maxLength);
     96     void updateValue() const;
     97     void setNonDirtyValue(const String&);
     98 
     99     virtual bool supportsPlaceholder() const { return true; }
    100     virtual bool isEmptyValue() const { return value().isEmpty(); }
    101     virtual int cachedSelectionStart() const { return m_cachedSelectionStart; }
    102     virtual int cachedSelectionEnd() const { return m_cachedSelectionEnd; }
    103 
    104     virtual bool isOptionalFormControl() const { return !isRequiredFormControl(); }
    105     virtual bool isRequiredFormControl() const { return required(); }
    106 
    107     int m_rows;
    108     int m_cols;
    109     WrapMethod m_wrap;
    110     mutable String m_value;
    111     int m_cachedSelectionStart;
    112     int m_cachedSelectionEnd;
    113     mutable bool m_isDirty;
    114 };
    115 
    116 } //namespace
    117 
    118 #endif
    119