/*

 * Copyright (C) 2010 Google Inc. All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions are

 * met:

 *

 *     * Redistributions of source code must retain the above copyright

 * notice, this list of conditions and the following disclaimer.

 *     * Redistributions in binary form must reproduce the above

 * copyright notice, this list of conditions and the following disclaimer

 * in the documentation and/or other materials provided with the

 * distribution.

 *     * Neither the name of Google Inc. nor the names of its

 * contributors may be used to endorse or promote products derived from

 * this software without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR

 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT

 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT

 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 */

#include "config.h"

#include "RenderInputSpeech.h"

#if ENABLE(INPUT_SPEECH)

#include "GraphicsContext.h"

#include "HTMLNames.h"

#include "RenderBox.h"

namespace WebCore {

static const float defaultControlFontPixelSize = 13;

static const float defaultSpeechButtonSize = 16;

static const float minSpeechButtonSize = 8;

static const float maxSpeechButtonSize = 40;

void RenderInputSpeech::adjustInputFieldSpeechButtonStyle(CSSStyleSelector*, RenderStyle* style, Element*)

{

    // Scale the button size based on the font size.

    float fontScale = style->fontSize() / defaultControlFontPixelSize;

    int speechButtonSize = lroundf(std::min(std::max(minSpeechButtonSize, defaultSpeechButtonSize * fontScale), maxSpeechButtonSize));

    style->setWidth(Length(speechButtonSize, Fixed));

    style->setHeight(Length(speechButtonSize, Fixed));

}

bool RenderInputSpeech::paintInputFieldSpeechButton(RenderObject* object, const PaintInfo& paintInfo, const IntRect& rect)

{

    // Get the renderer of <input> element.

    Node* input = object->node()->shadowAncestorNode();

    if (!input->renderer()->isBox())

        return false;

    RenderBox* inputRenderBox = toRenderBox(input->renderer());

    IntRect inputContentBox = inputRenderBox->contentBoxRect();

    // Make sure the scaled button stays square and will fit in its parent's box.

    int buttonSize = std::min(inputContentBox.width(), std::min(inputContentBox.height(), rect.height()));

    // Calculate button's coordinates relative to the input element.

    // Center the button vertically.  Round up though, so if it has to be one pixel off-center, it will

    // be one pixel closer to the bottom of the field.  This tends to look better with the text.

    IntRect buttonRect(object->offsetFromAncestorContainer(inputRenderBox).width(),

                       inputContentBox.y() + (inputContentBox.height() - buttonSize + 1) / 2,

                       buttonSize, buttonSize);

    // Compute an offset between the part renderer and the input renderer.

    IntSize offsetFromInputRenderer = -(object->offsetFromAncestorContainer(inputRenderBox));

    // Move the rect into partRenderer's coords.

    buttonRect.move(offsetFromInputRenderer);

    // Account for the local drawing offset.

    buttonRect.move(rect.x(), rect.y());

    DEFINE_STATIC_LOCAL(RefPtr<Image>, imageStateNormal, (Image::loadPlatformResource("inputSpeech")));

    paintInfo.context->drawImage(imageStateNormal.get(), object->style()->colorSpace(), buttonRect);

    return false;

}

} // namespace WebCore

#endif // ENABLE(INPUT_SPEECH)