/*

 * Copyright (C) 2006, 2007 Apple Inc. All rights reserved.

 *           (C) 2008 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/) 

 *

 * This library is free software; you can redistribute it and/or

 * modify it under the terms of the GNU Library General Public

 * License as published by the Free Software Foundation; either

 * version 2 of the License, or (at your option) any later version.

 *

 * This library is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

 * Library General Public License for more details.

 *

 * You should have received a copy of the GNU Library General Public License

 * along with this library; see the file COPYING.LIB.  If not, write to

 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,

 * Boston, MA 02110-1301, USA.

 *

 */

#ifndef RenderTextControl_h

#define RenderTextControl_h

#include "RenderBlock.h"

namespace WebCore {

class VisibleSelection;

class TextControlInnerElement;

class TextControlInnerTextElement;

class RenderTextControl : public RenderBlock {

public:

    virtual ~RenderTextControl();

    bool wasChangedSinceLastChangeEvent() const { return m_wasChangedSinceLastChangeEvent; }

    void setChangedSinceLastChangeEvent(bool wasChangedSinceLastChangeEvent) { m_wasChangedSinceLastChangeEvent = wasChangedSinceLastChangeEvent; }

    bool lastChangeWasUserEdit() const { return m_lastChangeWasUserEdit; }

    void setLastChangeWasUserEdit(bool lastChangeWasUserEdit);

    int selectionStart();

    int selectionEnd();

    void setSelectionStart(int);

    void setSelectionEnd(int);

    void select();

    void setSelectionRange(int start, int end);

    VisibleSelection selection(int start, int end) const;

    virtual void subtreeHasChanged();

    String text();

    String textWithHardLineBreaks();

    void selectionChanged(bool userTriggered);

    VisiblePosition visiblePositionForIndex(int index);

    int indexForVisiblePosition(const VisiblePosition&);

    void updatePlaceholderVisibility(bool, bool);

protected:

    RenderTextControl(Node*, bool);

    int scrollbarThickness() const;

    void adjustInnerTextStyle(const RenderStyle* startStyle, RenderStyle* textBlockStyle) const;

    void setInnerTextValue(const String&);

    virtual void styleDidChange(StyleDifference, const RenderStyle* oldStyle);

    void createSubtreeIfNeeded(TextControlInnerElement* innerBlock);

    void hitInnerTextElement(HitTestResult&, int x, int y, int tx, int ty);

    void forwardEvent(Event*);

    int textBlockWidth() const;

    int textBlockHeight() const;

    float scaleEmToUnits(int x) const;

    static bool hasValidAvgCharWidth(AtomicString family);

    virtual float getAvgCharWidth(AtomicString family);

    virtual int preferredContentWidth(float charWidth) const = 0;

    virtual void adjustControlHeightBasedOnLineHeight(int lineHeight) = 0;

    virtual void cacheSelection(int start, int end) = 0;

    virtual PassRefPtr<RenderStyle> createInnerTextStyle(const RenderStyle* startStyle) const = 0;

    virtual RenderStyle* textBaseStyle() const = 0;

    virtual void updateFromElement();

    virtual void calcHeight();

    friend class TextIterator;

    HTMLElement* innerTextElement() const;

    bool m_placeholderVisible;

private:

    virtual const char* renderName() const { return "RenderTextControl"; }

    virtual bool isTextControl() const { return true; }

    virtual void calcPrefWidths();

    virtual void removeLeftoverAnonymousBlock(RenderBlock*) { }

    virtual bool canHaveChildren() const { return false; }

    virtual bool avoidsFloats() const { return true; }

    void setInnerTextStyle(PassRefPtr<RenderStyle>);

    virtual void addFocusRingRects(Vector<IntRect>&, int tx, int ty);

    virtual bool canBeProgramaticallyScrolled(bool) const { return true; }

    virtual bool requiresForcedStyleRecalcPropagation() const { return true; }

    String finishText(Vector<UChar>&) const;

    bool m_wasChangedSinceLastChangeEvent;

    bool m_lastChangeWasUserEdit;

    RefPtr<TextControlInnerTextElement> m_innerText;

};

inline RenderTextControl* toRenderTextControl(RenderObject* object)

{ 

    ASSERT(!object || object->isTextControl());

    return static_cast<RenderTextControl*>(object);

}

inline const RenderTextControl* toRenderTextControl(const RenderObject* object)

{ 

    ASSERT(!object || object->isTextControl());

    return static_cast<const RenderTextControl*>(object);

}

// This will catch anyone doing an unnecessary cast.

void toRenderTextControl(const RenderTextControl*);

} // namespace WebCore

#endif // RenderTextControl_h