Moving GraphicsContext and dependencies from core to platform.

Source/core/platform/ScrollbarThemeMacNonOverlayAPI.mm

Index: Source/core/platform/ScrollbarThemeMacNonOverlayAPI.mm
diff --git a/Source/core/platform/ScrollbarThemeMacNonOverlayAPI.mm b/Source/core/platform/ScrollbarThemeMacNonOverlayAPI.mm
deleted file mode 100644
index 1851659955a180cf9d66f682a05ce2997b63bb3d..0000000000000000000000000000000000000000
--- a/Source/core/platform/ScrollbarThemeMacNonOverlayAPI.mm
+++ /dev/null
@@ -1,336 +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/ScrollbarThemeMacNonOverlayAPI.h"
-
-#include <Carbon/Carbon.h>
-#include "platform/scroll/ScrollbarThemeClient.h"
-#include "public/platform/mac/WebThemeEngine.h"
-#include "public/platform/Platform.h"
-#include "public/platform/WebRect.h"
-#include "skia/ext/skia_utils_mac.h"
-
-namespace WebCore {
-
-// FIXME: Get these numbers from CoreUI.
-static int cRealButtonLength[] = { 28, 21 };
-static int cButtonHitInset[] = { 3, 2 };
-// cRealButtonLength - cButtonInset
-static int cButtonLength[] = { 14, 10 };
-static int cScrollbarThickness[] = { 15, 11 };
-static int cButtonInset[] = { 14, 11 };
-static int cThumbMinLength[] = { 26, 20 };
-
-static int cOuterButtonLength[] = { 16, 14 }; // The outer button in a double button pair is a bit bigger.
-static int cOuterButtonOverlap = 2;
-
-static ScrollbarButtonsPlacement gButtonPlacement = ScrollbarButtonsDoubleEnd;
-
-void ScrollbarThemeMacNonOverlayAPI::updateButtonPlacement()
-{
-    NSString *buttonPlacement = [[NSUserDefaults standardUserDefaults] objectForKey:@"AppleScrollBarVariant"];
-    if ([buttonPlacement isEqualToString:@"Single"])
-        gButtonPlacement = ScrollbarButtonsSingle;
-    else if ([buttonPlacement isEqualToString:@"DoubleMin"])
-        gButtonPlacement = ScrollbarButtonsDoubleStart;
-    else if ([buttonPlacement isEqualToString:@"DoubleBoth"])
-        gButtonPlacement = ScrollbarButtonsDoubleBoth;
-    else {
-        gButtonPlacement = ScrollbarButtonsDoubleEnd;
-    }
-}
-
-static blink::WebThemeEngine::State scrollbarStateToThemeState(ScrollbarThemeClient* scrollbar)
-{
-    if (!scrollbar->enabled())
-        return blink::WebThemeEngine::StateDisabled;
-    if (!scrollbar->isScrollableAreaActive())
-        return blink::WebThemeEngine::StateInactive;
-    if (scrollbar->pressedPart() == ThumbPart)
-        return blink::WebThemeEngine::StatePressed;
-
-    return blink::WebThemeEngine::StateActive;
-}
-
-// Override ScrollbarThemeMacCommon::paint() to add support for the following:
-//     - drawing using WebThemeEngine functions
-//     - drawing tickmarks
-//     - Skia specific changes
-bool ScrollbarThemeMacNonOverlayAPI::paint(ScrollbarThemeClient* scrollbar, GraphicsContext* context, const IntRect& damageRect)
-{
-    // Get the tickmarks for the frameview.
-    Vector<IntRect> tickmarks;
-    scrollbar->getTickmarks(tickmarks);
-
-    HIThemeTrackDrawInfo trackInfo;
-    trackInfo.version = 0;
-    trackInfo.kind = scrollbar->controlSize() == RegularScrollbar ? kThemeMediumScrollBar : kThemeSmallScrollBar;
-    trackInfo.bounds = scrollbar->frameRect();
-    trackInfo.min = 0;
-    trackInfo.max = scrollbar->maximum();
-    trackInfo.value = scrollbar->currentPos();
-    trackInfo.trackInfo.scrollbar.viewsize = scrollbar->visibleSize();
-    trackInfo.attributes = 0;
-    if (scrollbar->orientation() == HorizontalScrollbar)
-        trackInfo.attributes |= kThemeTrackHorizontal;
-
-    if (!scrollbar->enabled())
-        trackInfo.enableState = kThemeTrackDisabled;
-    else
-        trackInfo.enableState = scrollbar->isScrollableAreaActive() ? kThemeTrackActive : kThemeTrackInactive;
-
-    if (!hasButtons(scrollbar))
-        trackInfo.enableState = kThemeTrackNothingToScroll;
-    trackInfo.trackInfo.scrollbar.pressState = scrollbarPartToHIPressedState(scrollbar->pressedPart());
-
-    SkCanvas* canvas = context->canvas();
-    CGAffineTransform currentCTM = gfx::SkMatrixToCGAffineTransform(canvas->getTotalMatrix());
-
-    // The Aqua scrollbar is buggy when rotated and scaled.  We will just draw into a bitmap if we detect a scale or rotation.
-    bool canDrawDirectly = currentCTM.a == 1.0f && currentCTM.b == 0.0f && currentCTM.c == 0.0f && (currentCTM.d == 1.0f || currentCTM.d == -1.0f);
-    GraphicsContext* drawingContext = context;
-    OwnPtr<ImageBuffer> imageBuffer;
-    if (!canDrawDirectly) {
-        trackInfo.bounds = IntRect(IntPoint(), scrollbar->frameRect().size());
-
-        IntRect bufferRect(scrollbar->frameRect());
-        bufferRect.intersect(damageRect);
-        bufferRect.move(-scrollbar->frameRect().x(), -scrollbar->frameRect().y());
-
-        imageBuffer = ImageBuffer::create(bufferRect.size());
-        if (!imageBuffer)
-            return true;
-
-        drawingContext = imageBuffer->context();
-    }
-
-    // Draw thumbless.
-    gfx::SkiaBitLocker bitLocker(drawingContext->canvas());
-    CGContextRef cgContext = bitLocker.cgContext();
-    HIThemeDrawTrack(&trackInfo, 0, cgContext, kHIThemeOrientationNormal);
-
-    IntRect tickmarkTrackRect = trackRect(scrollbar, false);
-    if (!canDrawDirectly) {
-        tickmarkTrackRect.setX(0);
-        tickmarkTrackRect.setY(0);
-    }
-    // The ends are rounded and the thumb doesn't go there.
-    tickmarkTrackRect.inflateY(-tickmarkTrackRect.width());
-    // Inset a bit.
-    tickmarkTrackRect.setX(tickmarkTrackRect.x() + 2);
-    tickmarkTrackRect.setWidth(tickmarkTrackRect.width() - 5);
-    paintGivenTickmarks(drawingContext, scrollbar, tickmarkTrackRect, tickmarks);
-
-    if (hasThumb(scrollbar)) {
-        blink::WebThemeEngine::ScrollbarInfo scrollbarInfo;
-        scrollbarInfo.orientation = scrollbar->orientation() == HorizontalScrollbar ? blink::WebThemeEngine::ScrollbarOrientationHorizontal : blink::WebThemeEngine::ScrollbarOrientationVertical;
-        scrollbarInfo.parent = scrollbar->isScrollViewScrollbar() ? blink::WebThemeEngine::ScrollbarParentScrollView : blink::WebThemeEngine::ScrollbarParentRenderLayer;
-        scrollbarInfo.maxValue = scrollbar->maximum();
-        scrollbarInfo.currentValue = scrollbar->currentPos();
-        scrollbarInfo.visibleSize = scrollbar->visibleSize();
-        scrollbarInfo.totalSize = scrollbar->totalSize();
-
-        blink::WebCanvas* webCanvas = drawingContext->canvas();
-        blink::Platform::current()->themeEngine()->paintScrollbarThumb(
-            webCanvas,
-            scrollbarStateToThemeState(scrollbar),
-            scrollbar->controlSize() == RegularScrollbar ? blink::WebThemeEngine::SizeRegular : blink::WebThemeEngine::SizeSmall,
-            blink::WebRect(scrollbar->frameRect()),
-            scrollbarInfo);
-    }
-
-    if (!canDrawDirectly)
-        context->drawImageBuffer(imageBuffer.get(), scrollbar->frameRect().location());
-
-    return true;
-}
-
-int ScrollbarThemeMacNonOverlayAPI::scrollbarThickness(ScrollbarControlSize controlSize)
-{
-    return cScrollbarThickness[controlSize];
-}
-
-ScrollbarButtonsPlacement ScrollbarThemeMacNonOverlayAPI::buttonsPlacement() const
-{
-    return gButtonPlacement;
-}
-
-bool ScrollbarThemeMacNonOverlayAPI::hasButtons(ScrollbarThemeClient* scrollbar)
-{
-    return scrollbar->enabled() && buttonsPlacement() != ScrollbarButtonsNone
-             && (scrollbar->orientation() == HorizontalScrollbar
-             ? scrollbar->width()
-             : scrollbar->height()) >= 2 * (cRealButtonLength[scrollbar->controlSize()] - cButtonHitInset[scrollbar->controlSize()]);
-}
-
-bool ScrollbarThemeMacNonOverlayAPI::hasThumb(ScrollbarThemeClient* scrollbar)
-{
-    int minLengthForThumb = 2 * cButtonInset[scrollbar->controlSize()] + cThumbMinLength[scrollbar->controlSize()] + 1;
-    return scrollbar->enabled() && (scrollbar->orientation() == HorizontalScrollbar ?
-             scrollbar->width() :
-             scrollbar->height()) >= minLengthForThumb;
-}
-
-static IntRect buttonRepaintRect(const IntRect& buttonRect, ScrollbarOrientation orientation, ScrollbarControlSize controlSize, bool start)
-{
-    ASSERT(gButtonPlacement != ScrollbarButtonsNone);
-
-    IntRect paintRect(buttonRect);
-    if (orientation == HorizontalScrollbar) {
-        paintRect.setWidth(cRealButtonLength[controlSize]);
-        if (!start)
-            paintRect.setX(buttonRect.x() - (cRealButtonLength[controlSize] - buttonRect.width()));
-    } else {
-        paintRect.setHeight(cRealButtonLength[controlSize]);
-        if (!start)
-            paintRect.setY(buttonRect.y() - (cRealButtonLength[controlSize] - buttonRect.height()));
-    }
-
-    return paintRect;
-}
-
-IntRect ScrollbarThemeMacNonOverlayAPI::backButtonRect(ScrollbarThemeClient* scrollbar, ScrollbarPart part, bool painting)
-{
-    IntRect result;
-
-    if (part == BackButtonStartPart && (buttonsPlacement() == ScrollbarButtonsNone || buttonsPlacement() == ScrollbarButtonsDoubleEnd))
-        return result;
-
-    if (part == BackButtonEndPart && (buttonsPlacement() == ScrollbarButtonsNone || buttonsPlacement() == ScrollbarButtonsDoubleStart || buttonsPlacement() == ScrollbarButtonsSingle))
-        return result;
-
-    int thickness = scrollbarThickness(scrollbar->controlSize());
-    bool outerButton = part == BackButtonStartPart && (buttonsPlacement() == ScrollbarButtonsDoubleStart || buttonsPlacement() == ScrollbarButtonsDoubleBoth);
-    if (outerButton) {
-        if (scrollbar->orientation() == HorizontalScrollbar)
-            result = IntRect(scrollbar->x(), scrollbar->y(), cOuterButtonLength[scrollbar->controlSize()] + (painting ? cOuterButtonOverlap : 0), thickness);
-        else
-            result = IntRect(scrollbar->x(), scrollbar->y(), thickness, cOuterButtonLength[scrollbar->controlSize()] + (painting ? cOuterButtonOverlap : 0));
-        return result;
-    }
-
-    // Our repaint rect is slightly larger, since we are a button that is adjacent to the track.
-    if (scrollbar->orientation() == HorizontalScrollbar) {
-        int start = part == BackButtonStartPart ? scrollbar->x() : scrollbar->x() + scrollbar->width() - cOuterButtonLength[scrollbar->controlSize()] - cButtonLength[scrollbar->controlSize()];
-        result = IntRect(start, scrollbar->y(), cButtonLength[scrollbar->controlSize()], thickness);
-    } else {
-        int start = part == BackButtonStartPart ? scrollbar->y() : scrollbar->y() + scrollbar->height() - cOuterButtonLength[scrollbar->controlSize()] - cButtonLength[scrollbar->controlSize()];
-        result = IntRect(scrollbar->x(), start, thickness, cButtonLength[scrollbar->controlSize()]);
-    }
-
-    if (painting)
-        return buttonRepaintRect(result, scrollbar->orientation(), scrollbar->controlSize(), part == BackButtonStartPart);
-    return result;
-}
-
-IntRect ScrollbarThemeMacNonOverlayAPI::forwardButtonRect(ScrollbarThemeClient* scrollbar, ScrollbarPart part, bool painting)
-{
-    IntRect result;
-
-    if (part == ForwardButtonEndPart && (buttonsPlacement() == ScrollbarButtonsNone || buttonsPlacement() == ScrollbarButtonsDoubleStart))
-        return result;
-
-    if (part == ForwardButtonStartPart && (buttonsPlacement() == ScrollbarButtonsNone || buttonsPlacement() == ScrollbarButtonsDoubleEnd || buttonsPlacement() == ScrollbarButtonsSingle))
-        return result;
-
-    int thickness = scrollbarThickness(scrollbar->controlSize());
-    int outerButtonLength = cOuterButtonLength[scrollbar->controlSize()];
-    int buttonLength = cButtonLength[scrollbar->controlSize()];
-
-    bool outerButton = part == ForwardButtonEndPart && (buttonsPlacement() == ScrollbarButtonsDoubleEnd || buttonsPlacement() == ScrollbarButtonsDoubleBoth);
-    if (outerButton) {
-        if (scrollbar->orientation() == HorizontalScrollbar) {
-            result = IntRect(scrollbar->x() + scrollbar->width() - outerButtonLength, scrollbar->y(), outerButtonLength, thickness);
-            if (painting)
-                result.inflateX(cOuterButtonOverlap);
-        } else {
-            result = IntRect(scrollbar->x(), scrollbar->y() + scrollbar->height() - outerButtonLength, thickness, outerButtonLength);
-            if (painting)
-                result.inflateY(cOuterButtonOverlap);
-        }
-        return result;
-    }
-
-    if (scrollbar->orientation() == HorizontalScrollbar) {
-        int start = part == ForwardButtonEndPart ? scrollbar->x() + scrollbar->width() - buttonLength : scrollbar->x() + outerButtonLength;
-        result = IntRect(start, scrollbar->y(), buttonLength, thickness);
-    } else {
-        int start = part == ForwardButtonEndPart ? scrollbar->y() + scrollbar->height() - buttonLength : scrollbar->y() + outerButtonLength;
-        result = IntRect(scrollbar->x(), start, thickness, buttonLength);
-    }
-    if (painting)
-        return buttonRepaintRect(result, scrollbar->orientation(), scrollbar->controlSize(), part == ForwardButtonStartPart);
-    return result;
-}
-
-IntRect ScrollbarThemeMacNonOverlayAPI::trackRect(ScrollbarThemeClient* scrollbar, bool painting)
-{
-    if (painting || !hasButtons(scrollbar))
-        return scrollbar->frameRect();
-
-    IntRect result;
-    int thickness = scrollbarThickness(scrollbar->controlSize());
-    int startWidth = 0;
-    int endWidth = 0;
-    int outerButtonLength = cOuterButtonLength[scrollbar->controlSize()];
-    int buttonLength = cButtonLength[scrollbar->controlSize()];
-    int doubleButtonLength = outerButtonLength + buttonLength;
-    switch (buttonsPlacement()) {
-        case ScrollbarButtonsSingle:
-            startWidth = buttonLength;
-            endWidth = buttonLength;
-            break;
-        case ScrollbarButtonsDoubleStart:
-            startWidth = doubleButtonLength;
-            break;
-        case ScrollbarButtonsDoubleEnd:
-            endWidth = doubleButtonLength;
-            break;
-        case ScrollbarButtonsDoubleBoth:
-            startWidth = doubleButtonLength;
-            endWidth = doubleButtonLength;
-            break;
-        default:
-            break;
-    }
-
-    int totalWidth = startWidth + endWidth;
-    if (scrollbar->orientation() == HorizontalScrollbar)
-        return IntRect(scrollbar->x() + startWidth, scrollbar->y(), scrollbar->width() - totalWidth, thickness);
-    return IntRect(scrollbar->x(), scrollbar->y() + startWidth, thickness, scrollbar->height() - totalWidth);
-}
-
-int ScrollbarThemeMacNonOverlayAPI::minimumThumbLength(ScrollbarThemeClient* scrollbar)
-{
-    return cThumbMinLength[scrollbar->controlSize()];
-}
-
-}