Source/platform/exported/WebScrollbarThemePainter.cpp

/*
 * Copyright (C) 2012 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:
 *
 * 1.  Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 * 2.  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.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS 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 APPLE OR ITS 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
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#include "config.h"

#include "public/platform/WebScrollbarThemePainter.h"

#include "platform/graphics/GraphicsContext.h"
#include "platform/graphics/paint/SkPictureBuilder.h"
#include "platform/scroll/Scrollbar.h"
#include "platform/scroll/ScrollbarTheme.h"
#include "public/platform/WebRect.h"
#include "third_party/skia/include/core/SkCanvas.h"

namespace blink {

void WebScrollbarThemePainter::assign(const WebScrollbarThemePainter& painter)
{
    // This is a pointer to a static object, so no ownership transferral.
    m_theme = painter.m_theme;
    m_scrollbar = painter.m_scrollbar;
}

void WebScrollbarThemePainter::reset()
{
    m_scrollbar = nullptr;
}

void WebScrollbarThemePainter::paintScrollbarBackground(WebCanvas* canvas, const WebRect& rect)
{
    SkRect clip = SkRect::MakeXYWH(rect.x, rect.y, rect.width, rect.height);
    canvas->clipRect(clip);

    IntRect intRect(rect);
    SkPictureBuilder pictureBuilder(intRect);
    m_theme->paintScrollbarBackground(&pictureBuilder.context(), m_scrollbar.get());
    pictureBuilder.endRecording()->playback(canvas);
}

void WebScrollbarThemePainter::paintTrackBackground(WebCanvas* canvas, const WebRect& rect)
{
    IntRect intRect(rect);
    SkPictureBuilder pictureBuilder(intRect);
    m_theme->paintTrackBackground(&pictureBuilder.context(), m_scrollbar.get(), intRect);
    pictureBuilder.endRecording()->playback(canvas);
}

void WebScrollbarThemePainter::paintBackTrackPart(WebCanvas* canvas, const WebRect& rect)
{
    IntRect intRect(rect);
    SkPictureBuilder pictureBuilder(intRect);
    m_theme->paintTrackPiece(&pictureBuilder.context(), m_scrollbar.get(), intRect, BackTrackPart);
    pictureBuilder.endRecording()->playback(canvas);
}

void WebScrollbarThemePainter::paintForwardTrackPart(WebCanvas* canvas, const WebRect& rect)
{
    IntRect intRect(rect);
    SkPictureBuilder pictureBuilder(intRect);
    m_theme->paintTrackPiece(&pictureBuilder.context(), m_scrollbar.get(), intRect, ForwardTrackPart);
    pictureBuilder.endRecording()->playback(canvas);
}

void WebScrollbarThemePainter::paintBackButtonStart(WebCanvas* canvas, const WebRect& rect)
{
    IntRect intRect(rect);
    SkPictureBuilder pictureBuilder(intRect);
    m_theme->paintButton(&pictureBuilder.context(), m_scrollbar.get(), intRect, BackButtonStartPart);
    pictureBuilder.endRecording()->playback(canvas);
}

void WebScrollbarThemePainter::paintBackButtonEnd(WebCanvas* canvas, const WebRect& rect)
{
    IntRect intRect(rect);
    SkPictureBuilder pictureBuilder(intRect);
    m_theme->paintButton(&pictureBuilder.context(), m_scrollbar.get(), intRect, BackButtonEndPart);
    pictureBuilder.endRecording()->playback(canvas);
}

void WebScrollbarThemePainter::paintForwardButtonStart(WebCanvas* canvas, const WebRect& rect)
{
    IntRect intRect(rect);
    SkPictureBuilder pictureBuilder(intRect);
    m_theme->paintButton(&pictureBuilder.context(), m_scrollbar.get(), intRect, ForwardButtonStartPart);
    pictureBuilder.endRecording()->playback(canvas);
}

void WebScrollbarThemePainter::paintForwardButtonEnd(WebCanvas* canvas, const WebRect& rect)
{
    IntRect intRect(rect);
    SkPictureBuilder pictureBuilder(intRect);
    m_theme->paintButton(&pictureBuilder.context(), m_scrollbar.get(), intRect, ForwardButtonEndPart);
    pictureBuilder.endRecording()->playback(canvas);
}

void WebScrollbarThemePainter::paintTickmarks(WebCanvas* canvas, const WebRect& rect)
{
    IntRect intRect(rect);
    SkPictureBuilder pictureBuilder(intRect);
    m_theme->paintTickmarks(&pictureBuilder.context(), m_scrollbar.get(), intRect);
    pictureBuilder.endRecording()->playback(canvas);
}

void WebScrollbarThemePainter::paintThumb(WebCanvas* canvas, const WebRect& rect)
{
    IntRect intRect(rect);
    SkPictureBuilder pictureBuilder(intRect);
    m_theme->paintThumb(&pictureBuilder.context(), m_scrollbar.get(), intRect);
    pictureBuilder.endRecording()->playback(canvas);
}

WebScrollbarThemePainter::WebScrollbarThemePainter(ScrollbarTheme* theme, Scrollbar* scrollbar)
    : m_theme(theme)
    , m_scrollbar(scrollbar)
{
}

} // namespace blink