1 files changed, 130 insertions, 0 deletions
diff --git a/Source/WebCore/page/ResourceUsageOverlay.cpp b/Source/WebCore/page/ResourceUsageOverlay.cpp
new file mode 100644
index 000000000..0e47a8fcb
--- /dev/null
+++ b/Source/WebCore/page/ResourceUsageOverlay.cpp
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+/*
+ * Copyright (C) 2015 Apple 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:
+ * 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. AND ITS 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 APPLE INC. OR ITS 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"
+
+#if ENABLE(RESOURCE_USAGE)
+
+#include "ResourceUsageOverlay.h"
+
+#include "FrameView.h"
+#include "Page.h"
+#include "PageOverlayController.h"
+#include "PlatformMouseEvent.h"
+
+namespace WebCore {
+
+ResourceUsageOverlay::ResourceUsageOverlay(Page& page)
+    : m_page(page)
+    , m_overlay(PageOverlay::create(*this, PageOverlay::OverlayType::View))
+{
+    // Let the event loop cycle before continuing with initialization.
+    // This way we'll have access to the FrameView's dimensions.
+    callOnMainThread([this] {
+        initialize();
+    });
+}
+
+ResourceUsageOverlay::~ResourceUsageOverlay()
+{
+    platformDestroy();
+
+    // FIXME: This is a hack so we don't try to uninstall the PageOverlay during Page destruction.
+    if (m_page.mainFrame().page())
+        m_page.mainFrame().pageOverlayController().uninstallPageOverlay(*m_overlay, PageOverlay::FadeMode::DoNotFade);
+}
+
+void ResourceUsageOverlay::initialize()
+{
+    if (!m_page.mainFrame().view())
+        return;
+
+    FrameView& frameView = *m_page.mainFrame().view();
+
+    IntRect initialRect(frameView.width() / 2 - normalWidth / 2, frameView.height() - normalHeight - 20, normalWidth, normalHeight);
+
+#if PLATFORM(IOS)
+    // FIXME: The overlay should be stuck to the viewport instead of moving along with the page.
+    initialRect.setY(20);
+#endif
+
+    m_overlay->setFrame(initialRect);
+    m_page.mainFrame().pageOverlayController().installPageOverlay(*m_overlay, PageOverlay::FadeMode::DoNotFade);
+    platformInitialize();
+}
+
+bool ResourceUsageOverlay::mouseEvent(PageOverlay&, const PlatformMouseEvent& event)
+{
+    if (event.button() != LeftButton)
+        return false;
+
+    switch (event.type()) {
+    case PlatformEvent::MousePressed: {
+        m_overlay->setShouldIgnoreMouseEventsOutsideBounds(false);
+        m_dragging = true;
+        IntPoint location = m_overlay->frame().location();
+        m_dragPoint = event.position() + IntPoint(-location.x(), -location.y());
+        return true;
+    }
+    case PlatformEvent::MouseReleased:
+        if (m_dragging) {
+            m_overlay->setShouldIgnoreMouseEventsOutsideBounds(true);
+            m_dragging = false;
+            return true;
+        }
+        break;
+    case PlatformEvent::MouseMoved:
+        if (m_dragging) {
+            IntRect newFrame = m_overlay->frame();
+
+            // Move the new frame relative to the point where the drag was initiated.
+            newFrame.setLocation(event.position());
+            newFrame.moveBy(IntPoint(-m_dragPoint.x(), -m_dragPoint.y()));
+
+            // Force the frame to stay inside the viewport entirely.
+            if (newFrame.x() < 0)
+                newFrame.setX(0);
+            if (newFrame.y() < m_page.topContentInset())
+                newFrame.setY(m_page.topContentInset());
+            FrameView& frameView = *m_page.mainFrame().view();
+            if (newFrame.maxX() > frameView.width())
+                newFrame.setX(frameView.width() - newFrame.width());
+            if (newFrame.maxY() > frameView.height())
+                newFrame.setY(frameView.height() - newFrame.height());
+
+            m_overlay->setFrame(newFrame);
+            m_overlay->setNeedsDisplay();
+            return true;
+        }
+        break;
+    default:
+        break;
+    }
+    return false;
+}
+
+}
+
+#endif