1 files changed, 163 insertions, 0 deletions
diff --git a/Source/WebCore/page/linux/ResourceUsageOverlayLinux.cpp b/Source/WebCore/page/linux/ResourceUsageOverlayLinux.cpp
new file mode 100644
index 000000000..cff63e00e
--- /dev/null
+++ b/Source/WebCore/page/linux/ResourceUsageOverlayLinux.cpp
@@ -0,0 +1,163 @@
+/*
+ * Copyright (C) 2017 Igalia S.L.
+ *
+ * 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"
+#include "ResourceUsageOverlay.h"
+
+#if ENABLE(RESOURCE_USAGE) && OS(LINUX)
+
+#include "Chrome.h"
+#include "ChromeClient.h"
+#include "CommonVM.h"
+#include "GraphicsContext.h"
+#include "Page.h"
+#include "RenderTheme.h"
+#include "ResourceUsageThread.h"
+#include <runtime/VM.h>
+
+namespace WebCore {
+
+static ResourceUsageData gData;
+
+static String cpuUsageString(float cpuUsage)
+{
+    if (cpuUsage < 0)
+        return ASCIILiteral("<unknown>");
+    return String::format("%.1f%%", cpuUsage);
+}
+
+static String formatByteNumber(size_t number)
+{
+    if (number >= 1024 * 1048576)
+        return String::format("%.3f GB", static_cast<double>(number) / (1024 * 1048576));
+    if (number >= 1048576)
+        return String::format("%.2f MB", static_cast<double>(number) / 1048576);
+    if (number >= 1024)
+        return String::format("%.1f kB", static_cast<double>(number) / 1024);
+    return String::format("%lu", number);
+}
+
+static String gcTimerString(double timerFireDate, double now)
+{
+    if (!timerFireDate)
+        return ASCIILiteral("[not scheduled]");
+    return String::format("%g", timerFireDate - now);
+}
+
+static const float gFontSize = 14;
+
+class ResourceUsageOverlayPainter final : public GraphicsLayerClient {
+public:
+    ResourceUsageOverlayPainter(ResourceUsageOverlay& overlay)
+        : m_overlay(overlay)
+    {
+        FontCascadeDescription fontDescription;
+        RenderTheme::defaultTheme()->systemFont(CSSValueMessageBox, fontDescription);
+        fontDescription.setComputedSize(gFontSize);
+        m_textFont = FontCascade(fontDescription, 0, 0);
+        m_textFont.update(nullptr);
+    }
+
+    ~ResourceUsageOverlayPainter()
+    {
+    }
+
+private:
+    void paintContents(const GraphicsLayer*, GraphicsContext& context, GraphicsLayerPaintingPhase, const FloatRect& clip) override
+    {
+        GraphicsContextStateSaver stateSaver(context);
+        context.fillRect(clip, Color(0.0f, 0.0f, 0.0f, 0.8f));
+        context.setFillColor(Color(0.9f, 0.9f, 0.9f, 1.f));
+
+        FloatPoint position = { 10, 20 };
+        String string =  "CPU: " + cpuUsageString(gData.cpu);
+        context.drawText(m_textFont, TextRun(string), position);
+        position.move(0, gFontSize + 2);
+
+        string = "Memory: " + formatByteNumber(gData.totalDirtySize);
+        context.drawText(m_textFont, TextRun(string), position);
+        position.move(0, gFontSize + 2);
+
+        string = "External: " + formatByteNumber(gData.totalExternalSize);
+        context.drawText(m_textFont, TextRun(string), position);
+        position.move(0, gFontSize + 2);
+
+        string = "GC Heap: " + formatByteNumber(gData.categories[MemoryCategory::GCHeap].dirtySize);
+        context.drawText(m_textFont, TextRun(string), position);
+        position.move(0, gFontSize + 2);
+
+        string = "GC owned: " + formatByteNumber(gData.categories[MemoryCategory::GCOwned].dirtySize);
+        context.drawText(m_textFont, TextRun(string), position);
+        position.move(0, gFontSize + 2);
+
+        double now = WTF::currentTime();
+        string = "Eden GC: " + gcTimerString(gData.timeOfNextEdenCollection, now);
+        context.drawText(m_textFont, TextRun(string), position);
+        position.move(0, gFontSize + 2);
+
+        string = "Full GC: " + gcTimerString(gData.timeOfNextFullCollection, now);
+        context.drawText(m_textFont, TextRun(string), position);
+        position.move(0, gFontSize + 2);
+    }
+
+    void notifyFlushRequired(const GraphicsLayer*) override
+    {
+        m_overlay.overlay().page()->chrome().client().scheduleCompositingLayerFlush();
+    }
+
+    ResourceUsageOverlay& m_overlay;
+    FontCascade m_textFont;
+};
+
+void ResourceUsageOverlay::platformInitialize()
+{
+    m_overlayPainter = std::make_unique<ResourceUsageOverlayPainter>(*this);
+    m_paintLayer = GraphicsLayer::create(overlay().page()->chrome().client().graphicsLayerFactory(), *m_overlayPainter);
+    m_paintLayer->setAnchorPoint(FloatPoint3D());
+    m_paintLayer->setSize({ normalWidth, normalHeight });
+    m_paintLayer->setBackgroundColor(Color(0.0f, 0.0f, 0.0f, 0.8f));
+    m_paintLayer->setDrawsContent(true);
+    overlay().layer().addChild(m_paintLayer.get());
+
+    ResourceUsageThread::addObserver(this, [this] (const ResourceUsageData& data) {
+        gData = data;
+        m_paintLayer->setNeedsDisplay();
+    });
+}
+
+void ResourceUsageOverlay::platformDestroy()
+{
+    ResourceUsageThread::removeObserver(this);
+    if (!m_paintLayer)
+        return;
+
+    m_paintLayer->removeFromParent();
+    m_paintLayer = nullptr;
+    m_overlayPainter = nullptr;
+}
+
+} // namespace WebCore
+
+#endif // ENABLE(RESOURCE_USAGE) && OS(LINUX)