/**

 * 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.

 *

 */

#include "config.h"

#include "RenderTextControlMultiLine.h"

#include "Event.h"

#include "EventNames.h"

#include "Frame.h"

#include "HTMLNames.h"

#include "HTMLTextAreaElement.h"

#include "HitTestResult.h"

namespace WebCore {

RenderTextControlMultiLine::RenderTextControlMultiLine(Node* node, bool placeholderVisible)

    : RenderTextControl(node, placeholderVisible)

{

}

RenderTextControlMultiLine::~RenderTextControlMultiLine()

{

    if (node())

        static_cast<HTMLTextAreaElement*>(node())->rendererWillBeDestroyed();

}

void RenderTextControlMultiLine::subtreeHasChanged()

{

    RenderTextControl::subtreeHasChanged();

    HTMLTextAreaElement* textArea = static_cast<HTMLTextAreaElement*>(node());

    textArea->setFormControlValueMatchesRenderer(false);

    textArea->setNeedsValidityCheck();

    if (!node()->focused())

        return;

    node()->dispatchEvent(Event::create(eventNames().inputEvent, true, false));

    if (Frame* frame = this->frame())

        frame->textDidChangeInTextArea(textArea);

}

bool RenderTextControlMultiLine::nodeAtPoint(const HitTestRequest& request, HitTestResult& result, int x, int y, int tx, int ty, HitTestAction hitTestAction)

{

    if (!RenderTextControl::nodeAtPoint(request, result, x, y, tx, ty, hitTestAction))

        return false;

    bool resultIsTextValueOrPlaceholder

        = (!m_placeholderVisible && result.innerNode() == innerTextElement())

        || (m_placeholderVisible && result.innerNode()->isDescendantOf(innerTextElement()));

    if (result.innerNode() == node() || resultIsTextValueOrPlaceholder)

        hitInnerTextElement(result, x, y, tx, ty);

    return true;

}

void RenderTextControlMultiLine::forwardEvent(Event* event)

{

    RenderTextControl::forwardEvent(event);

}

float RenderTextControlMultiLine::getAvgCharWidth(AtomicString family)

{

    // Since Lucida Grande is the default font, we want this to match the width

    // of Courier New, the default font for textareas in IE, Firefox and Safari Win.

    // 1229 is the avgCharWidth value in the OS/2 table for Courier New.

    if (family == AtomicString("Lucida Grande"))

        return scaleEmToUnits(1229);

    return RenderTextControl::getAvgCharWidth(family);

}

int RenderTextControlMultiLine::preferredContentWidth(float charWidth) const

{

    int factor = static_cast<HTMLTextAreaElement*>(node())->cols();

    return static_cast<int>(ceilf(charWidth * factor)) + scrollbarThickness();

}

void RenderTextControlMultiLine::adjustControlHeightBasedOnLineHeight(int lineHeight)

{

    setHeight(height() + lineHeight * static_cast<HTMLTextAreaElement*>(node())->rows());

}

int RenderTextControlMultiLine::baselinePosition(bool, bool) const

{

    return height() + marginTop() + marginBottom();

}

void RenderTextControlMultiLine::updateFromElement()

{

    createSubtreeIfNeeded(0);

    RenderTextControl::updateFromElement();

    HTMLTextAreaElement* textArea = static_cast<HTMLTextAreaElement*>(node());

    if (m_placeholderVisible)

        setInnerTextValue(textArea->strippedPlaceholder());

    else

        setInnerTextValue(textArea->value());

}

void RenderTextControlMultiLine::cacheSelection(int start, int end)

{

    static_cast<HTMLTextAreaElement*>(node())->cacheSelection(start, end);

}

PassRefPtr<RenderStyle> RenderTextControlMultiLine::createInnerTextStyle(const RenderStyle* startStyle) const

{

    RefPtr<RenderStyle> textBlockStyle;

    if (m_placeholderVisible) {

        if (RenderStyle* pseudoStyle = getCachedPseudoStyle(INPUT_PLACEHOLDER))

            textBlockStyle = RenderStyle::clone(pseudoStyle);

    }

    if (!textBlockStyle) {

        textBlockStyle = RenderStyle::create();

        textBlockStyle->inheritFrom(startStyle);

    }

    adjustInnerTextStyle(startStyle, textBlockStyle.get());

    textBlockStyle->setDisplay(BLOCK);

    return textBlockStyle.release();

}

RenderStyle* RenderTextControlMultiLine::textBaseStyle() const

{

    return style();

}

}