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/*
* Copyright (C) 2011, 2012 Research In Motion Limited. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "config.h"
#include "InRegionScrollableArea.h"
#include "Frame.h"
#include "LayerWebKitThread.h"
#include "RenderBox.h"
#include "RenderLayer.h"
#include "RenderLayerBacking.h"
#include "RenderObject.h"
#include "RenderView.h"
#include "WebPage_p.h"
using namespace WebCore;
namespace BlackBerry {
namespace WebKit {
InRegionScrollableArea::InRegionScrollableArea()
: m_webPage(0)
, m_layer(0)
, m_hasWindowVisibleRectCalculated(false)
{
}
InRegionScrollableArea::~InRegionScrollableArea()
{
}
InRegionScrollableArea::InRegionScrollableArea(WebPagePrivate* webPage, RenderLayer* layer)
: m_webPage(webPage)
, m_layer(layer)
, m_hasWindowVisibleRectCalculated(false)
{
ASSERT(webPage);
ASSERT(layer);
m_isNull = false;
// FIXME: Add an ASSERT here as the 'layer' must be scrollable.
RenderObject* layerRenderer = layer->renderer();
ASSERT(layerRenderer);
if (layerRenderer->isRenderView()) { // #document case
FrameView* view = toRenderView(layerRenderer)->frameView();
ASSERT(view);
Frame* frame = view->frame();
ASSERT_UNUSED(frame, frame);
m_scrollPosition = m_webPage->mapToTransformed(view->scrollPosition());
m_contentsSize = m_webPage->mapToTransformed(view->contentsSize());
m_viewportSize = m_webPage->mapToTransformed(view->visibleContentRect(false /*includeScrollbars*/)).size();
m_scrollsHorizontally = view->contentsWidth() > view->visibleWidth();
m_scrollsVertically = view->contentsHeight() > view->visibleHeight();
m_overscrollLimitFactor = 0.0; // FIXME eventually support overscroll
m_cachedCompositedScrollableLayer = 0; // FIXME: Needs composited layer for inner frames.
} else { // RenderBox-based elements case (scrollable boxes (div's, p's, textarea's, etc)).
RenderBox* box = m_layer->renderBox();
ASSERT(box);
ASSERT(box->canBeScrolledAndHasScrollableArea());
ScrollableArea* scrollableArea = static_cast<ScrollableArea*>(m_layer);
m_scrollPosition = m_webPage->mapToTransformed(scrollableArea->scrollPosition());
m_contentsSize = m_webPage->mapToTransformed(scrollableArea->contentsSize());
m_viewportSize = m_webPage->mapToTransformed(scrollableArea->visibleContentRect(false /*includeScrollbars*/)).size();
m_scrollsHorizontally = box->scrollWidth() != box->clientWidth() && box->scrollsOverflowX();
m_scrollsVertically = box->scrollHeight() != box->clientHeight() && box->scrollsOverflowY();
if (m_layer->usesCompositedScrolling()) {
m_supportsCompositedScrolling = true;
ASSERT(m_layer->backing()->hasScrollingLayer());
m_camouflagedCompositedScrollableLayer = reinterpret_cast<unsigned>(m_layer->backing()->scrollingLayer()->platformLayer());
m_cachedCompositedScrollableLayer = m_layer->backing()->scrollingLayer()->platformLayer();
}
m_overscrollLimitFactor = 0.0;
}
}
void InRegionScrollableArea::setVisibleWindowRect(const WebCore::IntRect& rect)
{
m_hasWindowVisibleRectCalculated = true;
m_visibleWindowRect = rect;
}
Platform::IntRect InRegionScrollableArea::visibleWindowRect() const
{
ASSERT(m_hasWindowVisibleRectCalculated);
return m_visibleWindowRect;
}
RenderLayer* InRegionScrollableArea::layer() const
{
ASSERT(!m_isNull);
return m_layer;
}
}
}
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