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/*
* Copyright (C) 2006, 2007, 2008 Apple Computer, Inc. All rights reserved.
* Copyright (C) 2006 Michael Emmel mike.emmel@gmail.com
* Copyright (C) 2007, 2009 Holger Hans Peter Freyther
* Copyright (C) 2008 Collabora Ltd.
*
* 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 COMPUTER, INC. ``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 COMPUTER, INC. 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 "ScrollView.h"
#include "FloatRect.h"
#include "GraphicsContext.h"
#include "HostWindow.h"
#include "IntRect.h"
#include "PlatformMouseEvent.h"
#include "PlatformWheelEvent.h"
#include "ScrollbarGtk.h"
#include "ScrollbarTheme.h"
#include <gtk/gtk.h>
using namespace std;
namespace WebCore {
void ScrollView::platformInit()
{
m_horizontalAdjustment = 0;
m_verticalAdjustment = 0;
}
void ScrollView::platformDestroy()
{
m_horizontalAdjustment = 0;
m_verticalAdjustment = 0;
}
PassRefPtr<Scrollbar> ScrollView::createScrollbar(ScrollbarOrientation orientation)
{
if (orientation == HorizontalScrollbar && m_horizontalAdjustment)
return ScrollbarGtk::createScrollbar(this, orientation, m_horizontalAdjustment);
else if (orientation == VerticalScrollbar && m_verticalAdjustment)
return ScrollbarGtk::createScrollbar(this, orientation, m_verticalAdjustment);
else
return Scrollbar::createNativeScrollbar(this, orientation, RegularScrollbar);
}
/*
* The following is assumed:
* (hadj && vadj) || (!hadj && !vadj)
*/
void ScrollView::setGtkAdjustments(GtkAdjustment* hadj, GtkAdjustment* vadj)
{
ASSERT(!hadj == !vadj);
m_horizontalAdjustment = hadj;
m_verticalAdjustment = vadj;
// Reset the adjustments to a sane default
if (m_horizontalAdjustment) {
m_horizontalAdjustment->lower = 0;
m_horizontalAdjustment->upper = 0;
m_horizontalAdjustment->value = 0;
gtk_adjustment_changed(m_horizontalAdjustment);
gtk_adjustment_value_changed(m_horizontalAdjustment);
m_verticalAdjustment->lower = 0;
m_verticalAdjustment->upper = 0;
m_verticalAdjustment->value = 0;
gtk_adjustment_changed(m_verticalAdjustment);
gtk_adjustment_value_changed(m_verticalAdjustment);
}
/* reconsider having a scrollbar */
setHasVerticalScrollbar(false);
setHasHorizontalScrollbar(false);
updateScrollbars(m_scrollOffset);
}
void ScrollView::platformAddChild(Widget* child)
{
if (!GTK_IS_SOCKET(child->platformWidget()))
gtk_container_add(GTK_CONTAINER(hostWindow()->platformWindow()), child->platformWidget());
}
void ScrollView::platformRemoveChild(Widget* child)
{
GtkWidget* parent;
// HostWindow can be NULL here. If that's the case
// let's grab the child's parent instead.
if (hostWindow())
parent = GTK_WIDGET(hostWindow()->platformWindow());
else
parent = GTK_WIDGET(child->platformWidget()->parent);
if (GTK_IS_CONTAINER(parent) && parent == child->platformWidget()->parent)
gtk_container_remove(GTK_CONTAINER(parent), child->platformWidget());
}
IntRect ScrollView::visibleContentRect(bool includeScrollbars) const
{
if (!m_horizontalAdjustment)
return IntRect(IntPoint(m_scrollOffset.width(), m_scrollOffset.height()),
IntSize(max(0, width() - (verticalScrollbar() && !includeScrollbars ? verticalScrollbar()->width() : 0)),
max(0, height() - (horizontalScrollbar() && !includeScrollbars ? horizontalScrollbar()->height() : 0))));
// Main frame.
GtkWidget* measuredWidget = hostWindow()->platformWindow();
GtkWidget* parent = gtk_widget_get_parent(measuredWidget);
// We may not be in a widget that displays scrollbars, but we may
// have other kinds of decoration that make us smaller.
if (parent && includeScrollbars)
measuredWidget = parent;
return IntRect(IntPoint(m_scrollOffset.width(), m_scrollOffset.height()),
IntSize(measuredWidget->allocation.width,
measuredWidget->allocation.height));
}
}
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