Moving GraphicsContext and dependencies from core to platform.

Source/core/platform/ScrollbarThemeMacOverlayAPI.mm

Index: Source/core/platform/ScrollbarThemeMacOverlayAPI.mm
diff --git a/Source/core/platform/ScrollbarThemeMacOverlayAPI.mm b/Source/core/platform/ScrollbarThemeMacOverlayAPI.mm
deleted file mode 100644
index 0781d2c52ee8b4786a7a14afb475dc3d146bfc1b..0000000000000000000000000000000000000000
--- a/Source/core/platform/ScrollbarThemeMacOverlayAPI.mm
+++ /dev/null
@@ -1,195 +0,0 @@
-/*
- * 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 "core/platform/ScrollbarThemeMacOverlayAPI.h"
-
-#include "core/platform/graphics/GraphicsContext.h"
-#include "core/platform/graphics/GraphicsContextStateSaver.h"
-#include "core/platform/mac/LocalCurrentGraphicsContext.h"
-#include "core/platform/mac/NSScrollerImpDetails.h"
-#include "platform/scroll/ScrollbarThemeClient.h"
-
-namespace WebCore {
-
-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(isScrollbarOverlayAPIAvailable());
-
-    GraphicsContextStateSaver stateSaver(*context);
-    context->translate(rect.x(), rect.y());
-    LocalCurrentGraphicsContext localContext(context);
-
-    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(isScrollbarOverlayAPIAvailable());
-
-    GraphicsContextStateSaver stateSaver(*context);
-    context->translate(rect.x(), rect.y());
-    LocalCurrentGraphicsContext localContext(context);
-
-    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 WebCore