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/*
* Copyright (C) 2013 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 "platform/scroll/ScrollbarThemeMacOverlayAPI.h"
#include "platform/graphics/GraphicsContext.h"
#include "platform/graphics/GraphicsContextStateSaver.h"
#include "platform/mac/LocalCurrentGraphicsContext.h"
#include "platform/mac/NSScrollerImpDetails.h"
#include "platform/scroll/ScrollbarThemeClient.h"
namespace blink {
typedef HashMap<ScrollbarThemeClient*, RetainPtr<ScrollbarPainter> > ScrollbarPainterMap;
static ScrollbarPainterMap* scrollbarPainterMap()
{
static ScrollbarPainterMap* map = new ScrollbarPainterMap;
return map;
}
static bool supportsExpandedScrollbars()
{
// FIXME: This is temporary until all platforms that support ScrollbarPainter support this part of the API.
static bool globalSupportsExpandedScrollbars = [NSClassFromString(@"NSScrollerImp") instancesRespondToSelector:@selector(setExpanded:)];
return globalSupportsExpandedScrollbars;
}
void ScrollbarThemeMacOverlayAPI::registerScrollbar(ScrollbarThemeClient* scrollbar)
{
ScrollbarThemeMacCommon::registerScrollbar(scrollbar);
bool isHorizontal = scrollbar->orientation() == HorizontalScrollbar;
ScrollbarPainter scrollbarPainter = [NSClassFromString(@"NSScrollerImp") scrollerImpWithStyle:recommendedScrollerStyle() controlSize:(NSControlSize)scrollbar->controlSize() horizontal:isHorizontal replacingScrollerImp:nil];
scrollbarPainterMap()->add(scrollbar, scrollbarPainter);
updateEnabledState(scrollbar);
updateScrollbarOverlayStyle(scrollbar);
}
void ScrollbarThemeMacOverlayAPI::unregisterScrollbar(ScrollbarThemeClient* scrollbar)
{
scrollbarPainterMap()->remove(scrollbar);
ScrollbarThemeMacCommon::unregisterScrollbar(scrollbar);
}
void ScrollbarThemeMacOverlayAPI::setNewPainterForScrollbar(ScrollbarThemeClient* scrollbar, ScrollbarPainter newPainter)
{
scrollbarPainterMap()->set(scrollbar, newPainter);
updateEnabledState(scrollbar);
updateScrollbarOverlayStyle(scrollbar);
}
ScrollbarPainter ScrollbarThemeMacOverlayAPI::painterForScrollbar(ScrollbarThemeClient* scrollbar)
{
return scrollbarPainterMap()->get(scrollbar).get();
}
void ScrollbarThemeMacOverlayAPI::paintTrackBackground(GraphicsContext* context, ScrollbarThemeClient* scrollbar, const IntRect& rect) {
ASSERT(isOverlayAPIAvailable());
GraphicsContextStateSaver stateSaver(*context);
context->translate(rect.x(), rect.y());
LocalCurrentGraphicsContext localContext(context, IntRect(IntPoint(), rect.size()));
CGRect frameRect = scrollbar->frameRect();
ScrollbarPainter scrollbarPainter = painterForScrollbar(scrollbar);
[scrollbarPainter setEnabled:scrollbar->enabled()];
[scrollbarPainter setBoundsSize: NSSizeFromCGSize(frameRect.size)];
NSRect trackRect = NSMakeRect(0, 0, frameRect.size.width, frameRect.size.height);
[scrollbarPainter drawKnobSlotInRect:trackRect highlight:NO];
}
void ScrollbarThemeMacOverlayAPI::paintThumb(GraphicsContext* context, ScrollbarThemeClient* scrollbar, const IntRect& rect) {
ASSERT(isOverlayAPIAvailable());
GraphicsContextStateSaver stateSaver(*context);
context->translate(rect.x(), rect.y());
LocalCurrentGraphicsContext localContext(context, IntRect(IntPoint(), rect.size()));
ScrollbarPainter scrollbarPainter = painterForScrollbar(scrollbar);
[scrollbarPainter setEnabled:scrollbar->enabled()];
[scrollbarPainter setBoundsSize:NSSizeFromCGSize(rect.size())];
[scrollbarPainter setDoubleValue:0];
[scrollbarPainter setKnobProportion:1];
if (scrollbar->enabled())
[scrollbarPainter drawKnob];
// If this state is not set, then moving the cursor over the scrollbar area will only cause the
// scrollbar to engorge when moved over the top of the scrollbar area.
[scrollbarPainter setBoundsSize: NSSizeFromCGSize(scrollbar->frameRect().size())];
}
int ScrollbarThemeMacOverlayAPI::scrollbarThickness(ScrollbarControlSize controlSize)
{
ScrollbarPainter scrollbarPainter = [NSClassFromString(@"NSScrollerImp") scrollerImpWithStyle:recommendedScrollerStyle() controlSize:controlSize horizontal:NO replacingScrollerImp:nil];
if (supportsExpandedScrollbars())
[scrollbarPainter setExpanded:YES];
return [scrollbarPainter trackBoxWidth];
}
bool ScrollbarThemeMacOverlayAPI::usesOverlayScrollbars() const
{
return recommendedScrollerStyle() == NSScrollerStyleOverlay;
}
void ScrollbarThemeMacOverlayAPI::updateScrollbarOverlayStyle(ScrollbarThemeClient* scrollbar)
{
ScrollbarPainter painter = painterForScrollbar(scrollbar);
switch (scrollbar->scrollbarOverlayStyle()) {
case ScrollbarOverlayStyleDefault:
[painter setKnobStyle:NSScrollerKnobStyleDefault];
break;
case ScrollbarOverlayStyleDark:
[painter setKnobStyle:NSScrollerKnobStyleDark];
break;
case ScrollbarOverlayStyleLight:
[painter setKnobStyle:NSScrollerKnobStyleLight];
break;
}
}
ScrollbarButtonsPlacement ScrollbarThemeMacOverlayAPI::buttonsPlacement() const
{
return ScrollbarButtonsNone;
}
bool ScrollbarThemeMacOverlayAPI::hasThumb(ScrollbarThemeClient* scrollbar)
{
ScrollbarPainter painter = painterForScrollbar(scrollbar);
int minLengthForThumb = [painter knobMinLength] + [painter trackOverlapEndInset] + [painter knobOverlapEndInset]
+ 2 * ([painter trackEndInset] + [painter knobEndInset]);
return scrollbar->enabled() && (scrollbar->orientation() == HorizontalScrollbar ?
scrollbar->width() :
scrollbar->height()) >= minLengthForThumb;
}
IntRect ScrollbarThemeMacOverlayAPI::backButtonRect(ScrollbarThemeClient* scrollbar, ScrollbarPart part, bool painting)
{
ASSERT(buttonsPlacement() == ScrollbarButtonsNone);
return IntRect();
}
IntRect ScrollbarThemeMacOverlayAPI::forwardButtonRect(ScrollbarThemeClient* scrollbar, ScrollbarPart part, bool painting)
{
ASSERT(buttonsPlacement() == ScrollbarButtonsNone);
return IntRect();
}
IntRect ScrollbarThemeMacOverlayAPI::trackRect(ScrollbarThemeClient* scrollbar, bool painting)
{
ASSERT(!hasButtons(scrollbar));
return scrollbar->frameRect();
}
int ScrollbarThemeMacOverlayAPI::minimumThumbLength(ScrollbarThemeClient* scrollbar)
{
return [painterForScrollbar(scrollbar) knobMinLength];
}
void ScrollbarThemeMacOverlayAPI::updateEnabledState(ScrollbarThemeClient* scrollbar)
{
[painterForScrollbar(scrollbar) setEnabled:scrollbar->enabled()];
}
} // namespace blink
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