1 files changed, 175 insertions, 0 deletions
diff --git a/chromium/third_party/WebKit/Source/platform/scroll/ScrollbarThemeAura.cpp b/chromium/third_party/WebKit/Source/platform/scroll/ScrollbarThemeAura.cpp
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index 00000000000..593afbb2e75
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+++ b/chromium/third_party/WebKit/Source/platform/scroll/ScrollbarThemeAura.cpp
@@ -0,0 +1,175 @@
+/*
+ * Copyright (c) 2008, 2009, 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/ScrollbarThemeAura.h"
+
+#include "platform/LayoutTestSupport.h"
+#include "platform/PlatformMouseEvent.h"
+#include "platform/RuntimeEnabledFeatures.h"
+#include "platform/graphics/GraphicsContext.h"
+#include "platform/scroll/ScrollbarThemeClient.h"
+#include "platform/scroll/ScrollbarThemeOverlay.h"
+#include "public/platform/Platform.h"
+#include "public/platform/WebRect.h"
+#include "public/platform/WebThemeEngine.h"
+
+namespace WebCore {
+
+static bool useMockTheme()
+{
+    return isRunningLayoutTest();
+}
+
+ScrollbarTheme* ScrollbarTheme::nativeTheme()
+{
+    if (RuntimeEnabledFeatures::overlayScrollbarsEnabled()) {
+        DEFINE_STATIC_LOCAL(ScrollbarThemeOverlay, theme, (10, 0, ScrollbarThemeOverlay::AllowHitTest));
+        return &theme;
+    }
+
+    DEFINE_STATIC_LOCAL(ScrollbarThemeAura, theme, ());
+    return &theme;
+}
+
+int ScrollbarThemeAura::scrollbarThickness(ScrollbarControlSize controlSize)
+{
+    // Horiz and Vert scrollbars are the same thickness.
+    // In unit tests we don't have the mock theme engine (because of layering violations), so we hard code the size (see bug 327470).
+    if (useMockTheme())
+        return 15;
+    IntSize scrollbarSize = blink::Platform::current()->themeEngine()->getSize(blink::WebThemeEngine::PartScrollbarVerticalTrack);
+    return scrollbarSize.width();
+}
+
+void ScrollbarThemeAura::paintTrackPiece(GraphicsContext* gc, ScrollbarThemeClient* scrollbar, const IntRect& rect, ScrollbarPart partType)
+{
+    if (gc->paintingDisabled())
+        return;
+    blink::WebThemeEngine::State state = scrollbar->hoveredPart() == partType ? blink::WebThemeEngine::StateHover : blink::WebThemeEngine::StateNormal;
+
+    if (useMockTheme() && !scrollbar->enabled())
+        state = blink::WebThemeEngine::StateDisabled;
+
+    IntRect alignRect = trackRect(scrollbar, false);
+    blink::WebThemeEngine::ExtraParams extraParams;
+    blink::WebCanvas* canvas = gc->canvas();
+    extraParams.scrollbarTrack.isBack = (partType == BackTrackPart);
+    extraParams.scrollbarTrack.trackX = alignRect.x();
+    extraParams.scrollbarTrack.trackY = alignRect.y();
+    extraParams.scrollbarTrack.trackWidth = alignRect.width();
+    extraParams.scrollbarTrack.trackHeight = alignRect.height();
+    blink::Platform::current()->themeEngine()->paint(canvas, scrollbar->orientation() == HorizontalScrollbar ? blink::WebThemeEngine::PartScrollbarHorizontalTrack : blink::WebThemeEngine::PartScrollbarVerticalTrack, state, blink::WebRect(rect), &extraParams);
+}
+
+void ScrollbarThemeAura::paintButton(GraphicsContext* gc, ScrollbarThemeClient* scrollbar, const IntRect& rect, ScrollbarPart part)
+{
+    if (gc->paintingDisabled())
+        return;
+    blink::WebThemeEngine::Part paintPart;
+    blink::WebThemeEngine::State state = blink::WebThemeEngine::StateNormal;
+    blink::WebCanvas* canvas = gc->canvas();
+    bool checkMin = false;
+    bool checkMax = false;
+
+    if (scrollbar->orientation() == HorizontalScrollbar) {
+        if (part == BackButtonStartPart) {
+            paintPart = blink::WebThemeEngine::PartScrollbarLeftArrow;
+            checkMin = true;
+        } else if (useMockTheme() && part != ForwardButtonEndPart) {
+            return;
+        } else {
+            paintPart = blink::WebThemeEngine::PartScrollbarRightArrow;
+            checkMax = true;
+        }
+    } else {
+        if (part == BackButtonStartPart) {
+            paintPart = blink::WebThemeEngine::PartScrollbarUpArrow;
+            checkMin = true;
+        } else if (useMockTheme() && part != ForwardButtonEndPart) {
+            return;
+        } else {
+            paintPart = blink::WebThemeEngine::PartScrollbarDownArrow;
+            checkMax = true;
+        }
+    }
+    if (useMockTheme() && !scrollbar->enabled()) {
+        state = blink::WebThemeEngine::StateDisabled;
+    } else if (!useMockTheme() && ((checkMin && (scrollbar->currentPos() <= 0))
+        || (checkMax && scrollbar->currentPos() >= scrollbar->maximum()))) {
+        state = blink::WebThemeEngine::StateDisabled;
+    } else {
+        if (part == scrollbar->pressedPart())
+            state = blink::WebThemeEngine::StatePressed;
+        else if (part == scrollbar->hoveredPart())
+            state = blink::WebThemeEngine::StateHover;
+    }
+    blink::Platform::current()->themeEngine()->paint(canvas, paintPart, state, blink::WebRect(rect), 0);
+}
+
+void ScrollbarThemeAura::paintThumb(GraphicsContext* gc, ScrollbarThemeClient* scrollbar, const IntRect& rect)
+{
+    if (gc->paintingDisabled())
+        return;
+    blink::WebThemeEngine::State state;
+    blink::WebCanvas* canvas = gc->canvas();
+    if (scrollbar->pressedPart() == ThumbPart)
+        state = blink::WebThemeEngine::StatePressed;
+    else if (scrollbar->hoveredPart() == ThumbPart)
+        state = blink::WebThemeEngine::StateHover;
+    else
+        state = blink::WebThemeEngine::StateNormal;
+    blink::Platform::current()->themeEngine()->paint(canvas, scrollbar->orientation() == HorizontalScrollbar ? blink::WebThemeEngine::PartScrollbarHorizontalThumb : blink::WebThemeEngine::PartScrollbarVerticalThumb, state, blink::WebRect(rect), 0);
+}
+
+IntSize ScrollbarThemeAura::buttonSize(ScrollbarThemeClient* scrollbar)
+{
+    if (scrollbar->orientation() == VerticalScrollbar) {
+        IntSize size = blink::Platform::current()->themeEngine()->getSize(blink::WebThemeEngine::PartScrollbarUpArrow);
+        return IntSize(size.width(), scrollbar->height() < 2 * size.height() ? scrollbar->height() / 2 : size.height());
+    }
+
+    // HorizontalScrollbar
+    IntSize size = blink::Platform::current()->themeEngine()->getSize(blink::WebThemeEngine::PartScrollbarLeftArrow);
+    return IntSize(scrollbar->width() < 2 * size.width() ? scrollbar->width() / 2 : size.width(), size.height());
+}
+
+int ScrollbarThemeAura::minimumThumbLength(ScrollbarThemeClient* scrollbar)
+{
+    if (scrollbar->orientation() == VerticalScrollbar) {
+        IntSize size = blink::Platform::current()->themeEngine()->getSize(blink::WebThemeEngine::PartScrollbarVerticalThumb);
+        return size.height();
+    }
+
+    IntSize size = blink::Platform::current()->themeEngine()->getSize(blink::WebThemeEngine::PartScrollbarHorizontalThumb);
+    return size.width();
+}
+
+} // namespace WebCore