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/*
* Copyright (C) 2008 Apple 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 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 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 "ScrollbarThemeGtk.h"
#ifndef GTK_API_VERSION_2
#include "PlatformContextCairo.h"
#include "PlatformMouseEvent.h"
#include "RenderThemeGtk.h"
#include "ScrollView.h"
#include "Scrollbar.h"
#include <gtk/gtk.h>
namespace WebCore {
static void gtkStyleChangedCallback(GtkWidget*, ScrollbarThemeGtk* scrollbarTheme)
{
scrollbarTheme->updateThemeProperties();
}
ScrollbarThemeGtk::ScrollbarThemeGtk()
: m_context(static_cast<RenderThemeGtk*>(RenderTheme::defaultTheme().get())->gtkScrollbarStyle())
{
updateThemeProperties();
g_signal_connect(m_context, "changed", G_CALLBACK(gtkStyleChangedCallback), this);
}
void ScrollbarThemeGtk::updateThemeProperties()
{
gtk_style_context_get_style(m_context,
"min-slider-length", &m_minThumbLength,
"slider-width", &m_thumbFatness,
"trough-border", &m_troughBorderWidth,
"stepper-size", &m_stepperSize,
"stepper-spacing", &m_stepperSpacing,
"trough-under-steppers", &m_troughUnderSteppers,
"has-backward-stepper", &m_hasBackButtonStartPart,
"has-forward-stepper", &m_hasForwardButtonEndPart,
"has-secondary-backward-stepper", &m_hasBackButtonEndPart,
"has-secondary-forward-stepper", &m_hasForwardButtonStartPart,
NULL);
updateScrollbarsFrameThickness();
}
static void applyScrollbarStyleContextClasses(GtkStyleContext* context, ScrollbarOrientation orientation)
{
gtk_style_context_add_class(context, GTK_STYLE_CLASS_SCROLLBAR);
gtk_style_context_add_class(context, orientation == VerticalScrollbar ? GTK_STYLE_CLASS_VERTICAL : GTK_STYLE_CLASS_HORIZONTAL);
}
void ScrollbarThemeGtk::paintTrackBackground(GraphicsContext* context, ScrollbarThemeClient* scrollbar, const IntRect& rect)
{
// Paint the track background. If the trough-under-steppers property is true, this
// should be the full size of the scrollbar, but if is false, it should only be the
// track rect.
IntRect fullScrollbarRect(rect);
if (m_troughUnderSteppers)
fullScrollbarRect = IntRect(scrollbar->x(), scrollbar->y(), scrollbar->width(), scrollbar->height());
gtk_style_context_save(m_context);
applyScrollbarStyleContextClasses(m_context, scrollbar->orientation());
gtk_style_context_add_class(m_context, GTK_STYLE_CLASS_TROUGH);
gtk_render_background(m_context, context->platformContext()->cr(),
fullScrollbarRect.x(), fullScrollbarRect.y(), fullScrollbarRect.width(), fullScrollbarRect.height());
gtk_render_frame(m_context, context->platformContext()->cr(),
fullScrollbarRect.x(), fullScrollbarRect.y(), fullScrollbarRect.width(), fullScrollbarRect.height());
gtk_style_context_restore(m_context);
}
void ScrollbarThemeGtk::paintScrollbarBackground(GraphicsContext* context, ScrollbarThemeClient* scrollbar)
{
gtk_style_context_save(m_context);
applyScrollbarStyleContextClasses(m_context, scrollbar->orientation());
gtk_style_context_add_class(m_context, "scrolled-window");
gtk_render_frame(m_context, context->platformContext()->cr(), scrollbar->x(), scrollbar->y(), scrollbar->width(), scrollbar->height());
gtk_style_context_restore(m_context);
}
void ScrollbarThemeGtk::paintThumb(GraphicsContext* context, ScrollbarThemeClient* scrollbar, const IntRect& rect)
{
gtk_style_context_save(m_context);
ScrollbarOrientation orientation = scrollbar->orientation();
applyScrollbarStyleContextClasses(m_context, orientation);
gtk_style_context_add_class(m_context, GTK_STYLE_CLASS_SLIDER);
guint flags = 0;
if (scrollbar->pressedPart() == ThumbPart)
flags |= GTK_STATE_FLAG_ACTIVE;
if (scrollbar->hoveredPart() == ThumbPart)
flags |= GTK_STATE_FLAG_PRELIGHT;
gtk_style_context_set_state(m_context, static_cast<GtkStateFlags>(flags));
gtk_render_slider(m_context, context->platformContext()->cr(), rect.x(), rect.y(), rect.width(), rect.height(),
orientation == VerticalScrollbar ? GTK_ORIENTATION_VERTICAL : GTK_ORIENTATION_HORIZONTAL);
gtk_style_context_restore(m_context);
}
void ScrollbarThemeGtk::paintButton(GraphicsContext* context, ScrollbarThemeClient* scrollbar, const IntRect& rect, ScrollbarPart part)
{
gtk_style_context_save(m_context);
ScrollbarOrientation orientation = scrollbar->orientation();
applyScrollbarStyleContextClasses(m_context, orientation);
guint flags = 0;
if ((BackButtonStartPart == part && scrollbar->currentPos())
|| (BackButtonEndPart == part && scrollbar->currentPos())
|| (ForwardButtonEndPart == part && scrollbar->currentPos() != scrollbar->maximum())
|| (ForwardButtonStartPart == part && scrollbar->currentPos() != scrollbar->maximum())) {
if (part == scrollbar->pressedPart())
flags |= GTK_STATE_FLAG_ACTIVE;
if (part == scrollbar->hoveredPart())
flags |= GTK_STATE_FLAG_PRELIGHT;
} else
flags |= GTK_STATE_FLAG_INSENSITIVE;
gtk_style_context_set_state(m_context, static_cast<GtkStateFlags>(flags));
gtk_style_context_add_class(m_context, GTK_STYLE_CLASS_BUTTON);
gtk_render_background(m_context, context->platformContext()->cr(), rect.x(), rect.y(), rect.width(), rect.height());
gtk_render_frame(m_context, context->platformContext()->cr(), rect.x(), rect.y(), rect.width(), rect.height());
gfloat arrowScaling;
gtk_style_context_get_style(m_context, "arrow-scaling", &arrowScaling, NULL);
double arrowSize = std::min(rect.width(), rect.height()) * arrowScaling;
FloatPoint arrowPoint(rect.x() + (rect.width() - arrowSize) / 2,
rect.y() + (rect.height() - arrowSize) / 2);
if (flags & GTK_STATE_FLAG_ACTIVE) {
gint arrowDisplacementX, arrowDisplacementY;
gtk_style_context_get_style(m_context,
"arrow-displacement-x", &arrowDisplacementX,
"arrow-displacement-y", &arrowDisplacementY,
NULL);
arrowPoint.move(arrowDisplacementX, arrowDisplacementY);
}
gdouble angle;
if (orientation == VerticalScrollbar) {
angle = (part == ForwardButtonEndPart || part == ForwardButtonStartPart) ? G_PI : 0;
} else {
angle = (part == ForwardButtonEndPart || part == ForwardButtonStartPart) ? G_PI / 2 : 3 * (G_PI / 2);
}
gtk_render_arrow(m_context, context->platformContext()->cr(), angle, arrowPoint.x(), arrowPoint.y(), arrowSize);
gtk_style_context_restore(m_context);
}
} // namespace WebCore
#endif // !GTK_API_VERSION_2
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