Moving GraphicsContext and dependencies from core to platform.

Source/core/platform/ScrollbarThemeWin.cpp

Index: Source/core/platform/ScrollbarThemeWin.cpp
diff --git a/Source/core/platform/ScrollbarThemeWin.cpp b/Source/core/platform/ScrollbarThemeWin.cpp
deleted file mode 100644
index 8814377ddef110c6e4bbeee16af4adab6a75128f..0000000000000000000000000000000000000000
--- a/Source/core/platform/ScrollbarThemeWin.cpp
+++ /dev/null
@@ -1,256 +0,0 @@
-/*
- * Copyright (C) 2008 Apple Inc. All Rights Reserved.
- * Copyright (C) 2008, 2009 Google Inc.
- *
- * 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 "core/platform/ScrollbarThemeWin.h"
-
-#include <windows.h>
-#include <vsstyle.h>
-
-#include "core/platform/graphics/GraphicsContext.h"
-#include "platform/LayoutTestSupport.h"
-#include "platform/PlatformMouseEvent.h"
-#include "platform/scroll/ScrollbarThemeClient.h"
-#include "platform/win/SystemInfo.h"
-#include "public/platform/Platform.h"
-#include "public/platform/WebRect.h"
-#include "public/platform/win/WebThemeEngine.h"
-
-namespace WebCore {
-
-ScrollbarTheme* ScrollbarTheme::nativeTheme()
-{
-    static ScrollbarThemeWin theme;
-    return &theme;
-}
-
-// The scrollbar size in DumpRenderTree on the Mac - so we can match their
-// layout results. Entries are for regular, small, and mini scrollbars.
-// Metrics obtained using [NSScroller scrollerWidthForControlSize:]
-static const int kMacScrollbarSize[3] = { 15, 11, 15 };
-
-// Constants used to figure the drag rect outside which we should snap the
-// scrollbar thumb back to its origin. These calculations are based on
-// observing the behavior of the MSVC8 main window scrollbar + some
-// guessing/extrapolation.
-static const int kOffEndMultiplier = 3;
-static const int kOffSideMultiplier = 8;
-
-int ScrollbarThemeWin::scrollbarThickness(ScrollbarControlSize controlSize)
-{
-    static int thickness;
-    if (!thickness) {
-        if (isRunningLayoutTest())
-            return kMacScrollbarSize[controlSize];
-        thickness = IntSize(blink::Platform::current()->themeEngine()->getSize(SBP_ARROWBTN)).width();
-    }
-    return thickness;
-}
-
-bool ScrollbarThemeWin::invalidateOnMouseEnterExit()
-{
-    return isWindowsVistaOrGreater();
-}
-
-bool ScrollbarThemeWin::shouldSnapBackToDragOrigin(ScrollbarThemeClient* scrollbar, const PlatformMouseEvent& evt)
-{
-    // Find the rect within which we shouldn't snap, by expanding the track rect
-    // in both dimensions.
-    IntRect rect = trackRect(scrollbar);
-    const bool horz = scrollbar->orientation() == HorizontalScrollbar;
-    const int thickness = scrollbarThickness(scrollbar->controlSize());
-    rect.inflateX((horz ? kOffEndMultiplier : kOffSideMultiplier) * thickness);
-    rect.inflateY((horz ? kOffSideMultiplier : kOffEndMultiplier) * thickness);
-
-    // Convert the event to local coordinates.
-    IntPoint mousePosition = scrollbar->convertFromContainingWindow(evt.position());
-    mousePosition.move(scrollbar->x(), scrollbar->y());
-
-    // We should snap iff the event is outside our calculated rect.
-    return !rect.contains(mousePosition);
-}
-
-void ScrollbarThemeWin::paintTrackPiece(GraphicsContext* gc, ScrollbarThemeClient* scrollbar, const IntRect& rect, ScrollbarPart partType)
-{
-    bool horz = scrollbar->orientation() == HorizontalScrollbar;
-
-    int partId;
-    if (partType == BackTrackPart)
-        partId = horz ? SBP_UPPERTRACKHORZ : SBP_UPPERTRACKVERT;
-    else
-        partId = horz ? SBP_LOWERTRACKHORZ : SBP_LOWERTRACKVERT;
-
-    IntRect alignRect = trackRect(scrollbar, false);
-
-    blink::WebCanvas* canvas = gc->canvas();
-    // Draw the track area before/after the thumb on the scroll bar.
-    blink::Platform::current()->themeEngine()->paintScrollbarTrack(canvas, partId, getThemeState(scrollbar, partType), getClassicThemeState(scrollbar, partType), blink::WebRect(rect), blink::WebRect(alignRect));
-}
-
-void ScrollbarThemeWin::paintButton(GraphicsContext* gc, ScrollbarThemeClient* scrollbar, const IntRect& rect, ScrollbarPart part)
-{
-    bool horz = scrollbar->orientation() == HorizontalScrollbar;
-
-    int partId;
-    if (part == BackButtonStartPart || part == ForwardButtonStartPart)
-        partId = horz ? DFCS_SCROLLLEFT : DFCS_SCROLLUP;
-    else
-        partId = horz ? DFCS_SCROLLRIGHT : DFCS_SCROLLDOWN;
-
-    blink::WebCanvas* canvas = gc->canvas();
-    // Draw the thumb (the box you drag in the scroll bar to scroll).
-    blink::Platform::current()->themeEngine()->paintScrollbarArrow(canvas, getThemeArrowState(scrollbar, part), partId | getClassicThemeState(scrollbar, part), blink::WebRect(rect));
-}
-
-void ScrollbarThemeWin::paintThumb(GraphicsContext* gc, ScrollbarThemeClient* scrollbar, const IntRect& rect)
-{
-    bool horz = scrollbar->orientation() == HorizontalScrollbar;
-
-    blink::WebCanvas* canvas = gc->canvas();
-    // Draw the thumb (the box you drag in the scroll bar to scroll).
-    blink::Platform::current()->themeEngine()->paintScrollbarThumb(canvas, horz ? SBP_THUMBBTNHORZ : SBP_THUMBBTNVERT, getThemeState(scrollbar, ThumbPart), getClassicThemeState(scrollbar, ThumbPart), blink::WebRect(rect));
-
-    // Draw the gripper (the three little lines on the thumb).
-    blink::Platform::current()->themeEngine()->paintScrollbarThumb(canvas, horz ? SBP_GRIPPERHORZ : SBP_GRIPPERVERT, getThemeState(scrollbar, ThumbPart), getClassicThemeState(scrollbar, ThumbPart), blink::WebRect(rect));
-}
-
-int ScrollbarThemeWin::getThemeState(ScrollbarThemeClient* scrollbar, ScrollbarPart part) const
-{
-    // When dragging the thumb, draw thumb pressed and other segments normal
-    // regardless of where the cursor actually is. See also four places in
-    // getThemeArrowState().
-    if (scrollbar->pressedPart() == ThumbPart) {
-        if (part == ThumbPart)
-            return SCRBS_PRESSED;
-        return isWindowsVistaOrGreater() ? SCRBS_HOVER : SCRBS_NORMAL;
-    }
-    if (!scrollbar->enabled())
-        return SCRBS_DISABLED;
-    if (scrollbar->hoveredPart() != part || part == BackTrackPart || part == ForwardTrackPart)
-        return (scrollbar->hoveredPart() == NoPart || !isWindowsVistaOrGreater()) ? SCRBS_NORMAL : SCRBS_HOVER;
-    if (scrollbar->pressedPart() == NoPart)
-        return SCRBS_HOT;
-    return (scrollbar->pressedPart() == part) ? SCRBS_PRESSED : SCRBS_NORMAL;
-}
-
-int ScrollbarThemeWin::getThemeArrowState(ScrollbarThemeClient* scrollbar, ScrollbarPart part) const
-{
-    // We could take advantage of knowing the values in the state enum to write
-    // some simpler code, but treating the state enum as a black box seems
-    // clearer and more future-proof.
-    if (part == BackButtonStartPart || part == ForwardButtonStartPart) {
-        if (scrollbar->orientation() == HorizontalScrollbar) {
-            if (scrollbar->pressedPart() == ThumbPart)
-                return isWindowsVistaOrGreater() ? ABS_LEFTHOVER : ABS_LEFTNORMAL;
-            if (!scrollbar->enabled())
-                return ABS_LEFTDISABLED;
-            if (scrollbar->hoveredPart() != part)
-                return ((scrollbar->hoveredPart() == NoPart) || !isWindowsVistaOrGreater()) ? ABS_LEFTNORMAL : ABS_LEFTHOVER;
-            if (scrollbar->pressedPart() == NoPart)
-                return ABS_LEFTHOT;
-            return (scrollbar->pressedPart() == part) ?
-                ABS_LEFTPRESSED : ABS_LEFTNORMAL;
-        }
-        if (scrollbar->pressedPart() == ThumbPart)
-            return isWindowsVistaOrGreater() ? ABS_UPHOVER : ABS_UPNORMAL;
-        if (!scrollbar->enabled())
-            return ABS_UPDISABLED;
-        if (scrollbar->hoveredPart() != part)
-            return ((scrollbar->hoveredPart() == NoPart) || !isWindowsVistaOrGreater()) ? ABS_UPNORMAL : ABS_UPHOVER;
-        if (scrollbar->pressedPart() == NoPart)
-            return ABS_UPHOT;
-        return (scrollbar->pressedPart() == part) ? ABS_UPPRESSED : ABS_UPNORMAL;
-    }
-    if (scrollbar->orientation() == HorizontalScrollbar) {
-        if (scrollbar->pressedPart() == ThumbPart)
-            return isWindowsVistaOrGreater() ? ABS_RIGHTHOVER : ABS_RIGHTNORMAL;
-        if (!scrollbar->enabled())
-            return ABS_RIGHTDISABLED;
-        if (scrollbar->hoveredPart() != part)
-            return ((scrollbar->hoveredPart() == NoPart) || !isWindowsVistaOrGreater()) ? ABS_RIGHTNORMAL : ABS_RIGHTHOVER;
-        if (scrollbar->pressedPart() == NoPart)
-            return ABS_RIGHTHOT;
-        return (scrollbar->pressedPart() == part) ? ABS_RIGHTPRESSED : ABS_RIGHTNORMAL;
-    }
-    if (scrollbar->pressedPart() == ThumbPart)
-        return isWindowsVistaOrGreater() ? ABS_DOWNHOVER : ABS_DOWNNORMAL;
-    if (!scrollbar->enabled())
-        return ABS_DOWNDISABLED;
-    if (scrollbar->hoveredPart() != part)
-        return ((scrollbar->hoveredPart() == NoPart) || !isWindowsVistaOrGreater()) ? ABS_DOWNNORMAL : ABS_DOWNHOVER;
-    if (scrollbar->pressedPart() == NoPart)
-        return ABS_DOWNHOT;
-    return (scrollbar->pressedPart() == part) ? ABS_DOWNPRESSED : ABS_DOWNNORMAL;
-}
-
-int ScrollbarThemeWin::getClassicThemeState(ScrollbarThemeClient* scrollbar, ScrollbarPart part) const
-{
-    // When dragging the thumb, draw the buttons normal even when hovered.
-    if (scrollbar->pressedPart() == ThumbPart)
-        return 0;
-    if (!scrollbar->enabled())
-        return DFCS_INACTIVE;
-    if (scrollbar->hoveredPart() != part || part == BackTrackPart || part == ForwardTrackPart)
-        return 0;
-    if (scrollbar->pressedPart() == NoPart)
-        return DFCS_HOT;
-    return (scrollbar->pressedPart() == part) ? (DFCS_PUSHED | DFCS_FLAT) : 0;
-}
-
-bool ScrollbarThemeWin::shouldCenterOnThumb(ScrollbarThemeClient*, const PlatformMouseEvent& evt)
-{
-    return evt.shiftKey() && evt.button() == LeftButton;
-}
-
-IntSize ScrollbarThemeWin::buttonSize(ScrollbarThemeClient* scrollbar)
-{
-    // Our desired rect is essentially thickness by thickness.
-
-    // Our actual rect will shrink to half the available space when we have < 2
-    // times thickness pixels left. This allows the scrollbar to scale down
-    // and function even at tiny sizes.
-
-    int thickness = scrollbarThickness(scrollbar->controlSize());
-
-    // In layout test mode, we force the button "girth" (i.e., the length of
-    // the button along the axis of the scrollbar) to be a fixed size.
-    // FIXME: This is retarded! scrollbarThickness is already fixed in layout
-    // test mode so that should be enough to result in repeatable results, but
-    // preserving this hack avoids having to rebaseline pixel tests.
-    const int kLayoutTestModeGirth = 17;
-    int girth = isRunningLayoutTest() ? kLayoutTestModeGirth : thickness;
-
-    if (scrollbar->orientation() == HorizontalScrollbar) {
-        int width = scrollbar->width() < 2 * girth ? scrollbar->width() / 2 : girth;
-        return IntSize(width, thickness);
-    }
-
-    int height = scrollbar->height() < 2 * girth ? scrollbar->height() / 2 : girth;
-    return IntSize(thickness, height);
-}
-
-
-} // namespace WebCore