Imported WebKit commit 2ea9d364d0f6efa8fa64acf19f451504c59be0e4 (http://svn.webkit.org/repository/webkit/trunk@104285)

1 files changed, 1782 insertions, 0 deletions

diff --git a/Source/WebKit2/UIProcess/win/WebView.cpp b/Source/WebKit2/UIProcess/win/WebView.cpp
new file mode 100644
index 000000000..d44e25560
--- /dev/null
+++ b/Source/WebKit2/UIProcess/win/WebView.cpp
@@ -0,0 +1,1782 @@
+/*
+ * Copyright (C) 2010 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"
+#include "WebView.h"
+
+#include "DrawingAreaProxyImpl.h"
+#include "FindIndicator.h"
+#include "Logging.h"
+#include "NativeWebKeyboardEvent.h"
+#include "NativeWebMouseEvent.h"
+#include "NativeWebWheelEvent.h"
+#include "RunLoop.h"
+#include "WKAPICast.h"
+#if USE(CG)
+#include "WKCACFViewWindow.h"
+#endif
+#include "WebContext.h"
+#include "WebContextMenuProxyWin.h"
+#include "WebEditCommandProxy.h"
+#include "WebEventFactory.h"
+#include "WebPageProxy.h"
+#include "WebPopupMenuProxyWin.h"
+#include <Commctrl.h>
+#include <WebCore/BitmapInfo.h>
+#include <WebCore/Cursor.h>
+#include <WebCore/DragSession.h>
+#include <WebCore/Editor.h>
+#include <WebCore/FloatRect.h>
+#if USE(CG)
+#include <WebCore/GraphicsContextCG.h>
+#endif
+#include <WebCore/IntRect.h>
+#include <WebCore/NotImplemented.h>
+#include <WebCore/Region.h>
+#include <WebCore/SoftLinking.h>
+#include <WebCore/WebCoreInstanceHandle.h>
+#include <WebCore/WindowMessageBroadcaster.h>
+#include <WebCore/WindowsTouch.h>
+#include <wtf/text/WTFString.h>
+
+#if ENABLE(FULLSCREEN_API)
+#include "WebFullScreenManagerProxy.h"
+#include <WebCore/FullScreenController.h>
+#endif
+
+namespace Ime {
+// We need these functions in a separate namespace, because in the global namespace they conflict
+// with the definitions in imm.h only by the type modifier (the macro defines them as static) and
+// imm.h is included by windows.h
+SOFT_LINK_LIBRARY(IMM32)
+SOFT_LINK(IMM32, ImmGetContext, HIMC, WINAPI, (HWND hwnd), (hwnd))
+SOFT_LINK(IMM32, ImmReleaseContext, BOOL, WINAPI, (HWND hWnd, HIMC hIMC), (hWnd, hIMC))
+SOFT_LINK(IMM32, ImmGetCompositionStringW, LONG, WINAPI, (HIMC hIMC, DWORD dwIndex, LPVOID lpBuf, DWORD dwBufLen), (hIMC, dwIndex, lpBuf, dwBufLen))
+SOFT_LINK(IMM32, ImmSetCandidateWindow, BOOL, WINAPI, (HIMC hIMC, LPCANDIDATEFORM lpCandidate), (hIMC, lpCandidate))
+SOFT_LINK(IMM32, ImmSetOpenStatus, BOOL, WINAPI, (HIMC hIMC, BOOL fOpen), (hIMC, fOpen))
+SOFT_LINK(IMM32, ImmNotifyIME, BOOL, WINAPI, (HIMC hIMC, DWORD dwAction, DWORD dwIndex, DWORD dwValue), (hIMC, dwAction, dwIndex, dwValue))
+SOFT_LINK(IMM32, ImmAssociateContextEx, BOOL, WINAPI, (HWND hWnd, HIMC hIMC, DWORD dwFlags), (hWnd, hIMC, dwFlags))
+};
+
+// Soft link functions for gestures and panning.
+SOFT_LINK_LIBRARY(USER32);
+SOFT_LINK_OPTIONAL(USER32, GetGestureInfo, BOOL, WINAPI, (HGESTUREINFO, PGESTUREINFO));
+SOFT_LINK_OPTIONAL(USER32, SetGestureConfig, BOOL, WINAPI, (HWND, DWORD, UINT, PGESTURECONFIG, UINT));
+SOFT_LINK_OPTIONAL(USER32, CloseGestureInfoHandle, BOOL, WINAPI, (HGESTUREINFO));
+
+SOFT_LINK_LIBRARY(Uxtheme);
+SOFT_LINK_OPTIONAL(Uxtheme, BeginPanningFeedback, BOOL, WINAPI, (HWND));
+SOFT_LINK_OPTIONAL(Uxtheme, EndPanningFeedback, BOOL, WINAPI, (HWND, BOOL));
+SOFT_LINK_OPTIONAL(Uxtheme, UpdatePanningFeedback, BOOL, WINAPI, (HWND, LONG, LONG, BOOL));
+
+using namespace WebCore;
+
+namespace WebKit {
+
+static const LPCWSTR kWebKit2WebViewWindowClassName = L"WebKit2WebViewWindowClass";
+
+// Constants not available on all platforms.
+const int WM_XP_THEMECHANGED = 0x031A;
+const int WM_VISTA_MOUSEHWHEEL = 0x020E;
+
+static const int kMaxToolTipWidth = 250;
+
+enum {
+    UpdateActiveStateTimer = 1,
+};
+
+LRESULT CALLBACK WebView::WebViewWndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
+{
+    LONG_PTR longPtr = ::GetWindowLongPtr(hWnd, 0);
+    
+    if (WebView* webView = reinterpret_cast<WebView*>(longPtr))
+        return webView->wndProc(hWnd, message, wParam, lParam);
+
+    if (message == WM_CREATE) {
+        LPCREATESTRUCT createStruct = reinterpret_cast<LPCREATESTRUCT>(lParam);
+
+        // Associate the WebView with the window.
+        ::SetWindowLongPtr(hWnd, 0, (LONG_PTR)createStruct->lpCreateParams);
+        return 0;
+    }
+
+    return ::DefWindowProc(hWnd, message, wParam, lParam);
+}
+
+LRESULT WebView::wndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
+{
+    LRESULT lResult = 0;
+    bool handled = true;
+
+    switch (message) {
+    case WM_CLOSE:
+        m_page->tryClose();
+        break;
+    case WM_DESTROY:
+        m_isBeingDestroyed = true;
+        close();
+        break;
+    case WM_ERASEBKGND:
+        lResult = 1;
+        break;
+    case WM_PAINT:
+        lResult = onPaintEvent(hWnd, message, wParam, lParam, handled);
+        break;
+    case WM_PRINTCLIENT:
+        lResult = onPrintClientEvent(hWnd, message, wParam, lParam, handled);
+        break;
+    case WM_MOUSEACTIVATE:
+        setWasActivatedByMouseEvent(true);
+        handled = false;
+        break;
+    case WM_MOUSEMOVE:
+    case WM_LBUTTONDOWN:
+    case WM_MBUTTONDOWN:
+    case WM_RBUTTONDOWN:
+    case WM_LBUTTONDBLCLK:
+    case WM_MBUTTONDBLCLK:
+    case WM_RBUTTONDBLCLK:
+    case WM_LBUTTONUP:
+    case WM_MBUTTONUP:
+    case WM_RBUTTONUP:
+    case WM_MOUSELEAVE:
+        lResult = onMouseEvent(hWnd, message, wParam, lParam, handled);
+        break;
+    case WM_MOUSEWHEEL:
+    case WM_VISTA_MOUSEHWHEEL:
+        lResult = onWheelEvent(hWnd, message, wParam, lParam, handled);
+        break;
+    case WM_HSCROLL:
+        lResult = onHorizontalScroll(hWnd, message, wParam, lParam, handled);
+        break;
+    case WM_VSCROLL:
+        lResult = onVerticalScroll(hWnd, message, wParam, lParam, handled);
+        break;
+    case WM_GESTURENOTIFY:
+        lResult = onGestureNotify(hWnd, message, wParam, lParam, handled);
+        break;
+    case WM_GESTURE:
+        lResult = onGesture(hWnd, message, wParam, lParam, handled);
+        break;
+    case WM_SYSKEYDOWN:
+    case WM_KEYDOWN:
+    case WM_SYSCHAR:
+    case WM_CHAR:
+    case WM_SYSKEYUP:
+    case WM_KEYUP:
+        lResult = onKeyEvent(hWnd, message, wParam, lParam, handled);
+        break;
+    case WM_SIZE:
+        lResult = onSizeEvent(hWnd, message, wParam, lParam, handled);
+        break;
+    case WM_WINDOWPOSCHANGED:
+        lResult = onWindowPositionChangedEvent(hWnd, message, wParam, lParam, handled);
+        break;
+    case WM_SETFOCUS:
+        lResult = onSetFocusEvent(hWnd, message, wParam, lParam, handled);
+        break;
+    case WM_KILLFOCUS:
+        lResult = onKillFocusEvent(hWnd, message, wParam, lParam, handled);
+        break;
+    case WM_TIMER:
+        lResult = onTimerEvent(hWnd, message, wParam, lParam, handled);
+        break;
+    case WM_SHOWWINDOW:
+        lResult = onShowWindowEvent(hWnd, message, wParam, lParam, handled);
+        break;
+    case WM_SETCURSOR:
+        lResult = onSetCursor(hWnd, message, wParam, lParam, handled);
+        break;
+    case WM_IME_STARTCOMPOSITION:
+        handled = onIMEStartComposition();
+        break;
+    case WM_IME_REQUEST:
+        lResult = onIMERequest(wParam, lParam);
+        break;
+    case WM_IME_COMPOSITION:
+        handled = onIMEComposition(lParam);
+        break;
+    case WM_IME_ENDCOMPOSITION:
+        handled = onIMEEndComposition();
+        break;
+    case WM_IME_SELECT:
+        handled = onIMESelect(wParam, lParam);
+        break;
+    case WM_IME_SETCONTEXT:
+        handled = onIMESetContext(wParam, lParam);
+        break;
+    default:
+        handled = false;
+        break;
+    }
+
+    if (!handled)
+        lResult = ::DefWindowProc(hWnd, message, wParam, lParam);
+
+    return lResult;
+}
+
+bool WebView::registerWebViewWindowClass()
+{
+    static bool haveRegisteredWindowClass = false;
+    if (haveRegisteredWindowClass)
+        return true;
+    haveRegisteredWindowClass = true;
+
+    WNDCLASSEX wcex;
+
+    wcex.cbSize = sizeof(WNDCLASSEX);
+    wcex.style          = CS_DBLCLKS;
+    wcex.lpfnWndProc    = WebView::WebViewWndProc;
+    wcex.cbClsExtra     = 0;
+    wcex.cbWndExtra     = sizeof(WebView*);
+    wcex.hInstance      = instanceHandle();
+    wcex.hIcon          = 0;
+    wcex.hCursor        = ::LoadCursor(0, IDC_ARROW);
+    wcex.hbrBackground  = 0;
+    wcex.lpszMenuName   = 0;
+    wcex.lpszClassName  = kWebKit2WebViewWindowClassName;
+    wcex.hIconSm        = 0;
+
+    return !!::RegisterClassEx(&wcex);
+}
+
+WebView::WebView(RECT rect, WebContext* context, WebPageGroup* pageGroup, HWND parentWindow)
+    : m_topLevelParentWindow(0)
+    , m_toolTipWindow(0)
+    , m_lastCursorSet(0)
+    , m_webCoreCursor(0)
+    , m_overrideCursor(0)
+    , m_trackingMouseLeave(false)
+    , m_isInWindow(false)
+    , m_isVisible(false)
+    , m_wasActivatedByMouseEvent(false)
+    , m_isBeingDestroyed(false)
+    , m_inIMEComposition(0)
+    , m_findIndicatorCallback(0)
+    , m_findIndicatorCallbackContext(0)
+    , m_pageOverlayInstalled(false)
+    , m_lastPanX(0)
+    , m_lastPanY(0)
+    , m_overPanY(0)
+    , m_gestureReachedScrollingLimit(false)
+#if USE(ACCELERATED_COMPOSITING)
+    , m_layerHostWindow(0)
+#endif
+{
+    registerWebViewWindowClass();
+
+    m_window = ::CreateWindowExW(0, kWebKit2WebViewWindowClassName, 0, WS_CHILD | WS_CLIPSIBLINGS | WS_CLIPCHILDREN | WS_VISIBLE,
+        rect.top, rect.left, rect.right - rect.left, rect.bottom - rect.top, parentWindow ? parentWindow : HWND_MESSAGE, 0, instanceHandle(), this);
+    ASSERT(::IsWindow(m_window));
+    // We only check our window style, and not ::IsWindowVisible, because m_isVisible only tracks
+    // this window's visibility status, while ::IsWindowVisible takes our ancestors' visibility
+    // status into account. <http://webkit.org/b/54104>
+    ASSERT(m_isVisible == static_cast<bool>(::GetWindowLong(m_window, GWL_STYLE) & WS_VISIBLE));
+
+    m_page = context->createWebPage(this, pageGroup);
+    m_page->initializeWebPage();
+
+    CoCreateInstance(CLSID_DragDropHelper, 0, CLSCTX_INPROC_SERVER, IID_IDropTargetHelper, (void**)&m_dropTargetHelper);
+
+    // FIXME: Initializing the tooltip window here matches WebKit win, but seems like something
+    // we could do on demand to save resources.
+    initializeToolTipWindow();
+
+    // Initialize the top level parent window and register it with the WindowMessageBroadcaster.
+    windowAncestryDidChange();
+
+#if ENABLE(FULLSCREEN_API)
+    m_page->fullScreenManager()->setWebView(this);
+#endif
+}
+
+WebView::~WebView()
+{
+    // Tooltip window needs to be explicitly destroyed since it isn't a WS_CHILD.
+    if (::IsWindow(m_toolTipWindow))
+        ::DestroyWindow(m_toolTipWindow);
+}
+
+void WebView::initialize()
+{
+    ::RegisterDragDrop(m_window, this);
+
+    if (shouldInitializeTrackPointHack()) {
+        // If we detected a registry key belonging to a TrackPoint driver, then create fake
+        // scrollbars, so the WebView will receive WM_VSCROLL and WM_HSCROLL messages.
+        // We create an invisible vertical scrollbar and an invisible horizontal scrollbar to allow
+        // for receiving both types of messages.
+        ::CreateWindow(TEXT("SCROLLBAR"), TEXT("FAKETRACKPOINTHSCROLLBAR"), WS_CHILD | WS_VISIBLE | SBS_HORZ, 0, 0, 0, 0, m_window, 0, instanceHandle(), 0);
+        ::CreateWindow(TEXT("SCROLLBAR"), TEXT("FAKETRACKPOINTVSCROLLBAR"), WS_CHILD | WS_VISIBLE | SBS_VERT, 0, 0, 0, 0, m_window, 0, instanceHandle(), 0);
+    }
+}
+
+void WebView::initializeUndoClient(const WKViewUndoClient* client)
+{
+    m_undoClient.initialize(client);
+}
+
+void WebView::setParentWindow(HWND parentWindow)
+{
+    if (m_window) {
+        // If the host window hasn't changed, bail.
+        if (::GetParent(m_window) == parentWindow)
+            return;
+        if (parentWindow)
+            ::SetParent(m_window, parentWindow);
+        else if (!m_isBeingDestroyed) {
+            // Turn the WebView into a message-only window so it will no longer be a child of the
+            // old parent window and will be hidden from screen. We only do this when
+            // isBeingDestroyed() is false because doing this while handling WM_DESTROY can leave
+            // m_window in a weird state (see <http://webkit.org/b/29337>).
+            ::SetParent(m_window, HWND_MESSAGE);
+        }
+    }
+
+    windowAncestryDidChange();
+}
+
+static HWND findTopLevelParentWindow(HWND window)
+{
+    if (!window)
+        return 0;
+
+    HWND current = window;
+    for (HWND parent = GetParent(current); current; current = parent, parent = GetParent(parent)) {
+        if (!parent || !(GetWindowLongPtr(current, GWL_STYLE) & (WS_POPUP | WS_CHILD)))
+            return current;
+    }
+    ASSERT_NOT_REACHED();
+    return 0;
+}
+
+void WebView::windowAncestryDidChange()
+{
+    HWND newTopLevelParentWindow;
+    if (m_window)
+        newTopLevelParentWindow = findTopLevelParentWindow(m_window);
+    else {
+        // There's no point in tracking active state changes of our parent window if we don't have
+        // a window ourselves.
+        newTopLevelParentWindow = 0;
+    }
+
+    if (newTopLevelParentWindow == m_topLevelParentWindow)
+        return;
+
+    if (m_topLevelParentWindow)
+        WindowMessageBroadcaster::removeListener(m_topLevelParentWindow, this);
+
+    m_topLevelParentWindow = newTopLevelParentWindow;
+
+    if (m_topLevelParentWindow)
+        WindowMessageBroadcaster::addListener(m_topLevelParentWindow, this);
+
+    updateActiveState();
+}
+
+LRESULT WebView::onMouseEvent(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam, bool& handled)
+{
+    NativeWebMouseEvent mouseEvent = NativeWebMouseEvent(hWnd, message, wParam, lParam, m_wasActivatedByMouseEvent);
+    setWasActivatedByMouseEvent(false);
+    
+    switch (message) {
+    case WM_LBUTTONDOWN:
+    case WM_MBUTTONDOWN:
+    case WM_RBUTTONDOWN:
+        ::SetFocus(m_window);
+        ::SetCapture(m_window);
+        break; 
+    case WM_LBUTTONUP:
+    case WM_MBUTTONUP:
+    case WM_RBUTTONUP:
+        ::ReleaseCapture();
+        break;
+    case WM_MOUSEMOVE:
+        startTrackingMouseLeave();
+        break;
+    case WM_MOUSELEAVE:
+        stopTrackingMouseLeave();
+        break;
+    case WM_LBUTTONDBLCLK:
+    case WM_MBUTTONDBLCLK:
+    case WM_RBUTTONDBLCLK:
+        break;
+    default:
+        ASSERT_NOT_REACHED();
+    }
+
+    m_page->handleMouseEvent(mouseEvent);
+
+    handled = true;
+    return 0;
+}
+
+LRESULT WebView::onWheelEvent(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam, bool& handled)
+{
+    NativeWebWheelEvent wheelEvent(hWnd, message, wParam, lParam);
+    if (wheelEvent.controlKey()) {
+        // We do not want WebKit to handle Control + Wheel, this should be handled by the client application
+        // to zoom the page.
+        handled = false;
+        return 0;
+    }
+
+    m_page->handleWheelEvent(wheelEvent);
+
+    handled = true;
+    return 0;
+}
+
+LRESULT WebView::onHorizontalScroll(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam, bool& handled)
+{
+    ScrollDirection direction;
+    ScrollGranularity granularity;
+    switch (LOWORD(wParam)) {
+    case SB_LINELEFT:
+        granularity = ScrollByLine;
+        direction = ScrollLeft;
+        break;
+    case SB_LINERIGHT:
+        granularity = ScrollByLine;
+        direction = ScrollRight;
+        break;
+    case SB_PAGELEFT:
+        granularity = ScrollByDocument;
+        direction = ScrollLeft;
+        break;
+    case SB_PAGERIGHT:
+        granularity = ScrollByDocument;
+        direction = ScrollRight;
+        break;
+    default:
+        handled = false;
+        return 0;
+    }
+
+    m_page->scrollBy(direction, granularity);
+
+    handled = true;
+    return 0;
+}
+
+LRESULT WebView::onVerticalScroll(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam, bool& handled)
+{
+    ScrollDirection direction;
+    ScrollGranularity granularity;
+    switch (LOWORD(wParam)) {
+    case SB_LINEDOWN:
+        granularity = ScrollByLine;
+        direction = ScrollDown;
+        break;
+    case SB_LINEUP:
+        granularity = ScrollByLine;
+        direction = ScrollUp;
+        break;
+    case SB_PAGEDOWN:
+        granularity = ScrollByDocument;
+        direction = ScrollDown;
+        break;
+    case SB_PAGEUP:
+        granularity = ScrollByDocument;
+        direction = ScrollUp;
+        break;
+    default:
+        handled = false;
+        return 0;
+    }
+
+    m_page->scrollBy(direction, granularity);
+
+    handled = true;
+    return 0;
+}
+
+LRESULT WebView::onGestureNotify(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam, bool& handled)
+{
+    // We shouldn't be getting any gesture messages without SetGestureConfig soft-linking correctly.
+    ASSERT(SetGestureConfigPtr());
+
+    GESTURENOTIFYSTRUCT* gn = reinterpret_cast<GESTURENOTIFYSTRUCT*>(lParam);
+
+    POINT localPoint = { gn->ptsLocation.x, gn->ptsLocation.y };
+    ::ScreenToClient(m_window, &localPoint);
+
+    bool canPan = m_page->gestureWillBegin(localPoint);
+
+    DWORD dwPanWant = GC_PAN | GC_PAN_WITH_INERTIA | GC_PAN_WITH_GUTTER;
+    DWORD dwPanBlock = GC_PAN_WITH_SINGLE_FINGER_HORIZONTALLY;
+    if (canPan)
+        dwPanWant |= GC_PAN_WITH_SINGLE_FINGER_VERTICALLY;
+    else
+        dwPanBlock |= GC_PAN_WITH_SINGLE_FINGER_VERTICALLY;
+
+    GESTURECONFIG gc = { GID_PAN, dwPanWant, dwPanBlock };
+    return SetGestureConfigPtr()(m_window, 0, 1, &gc, sizeof(gc));
+}
+
+LRESULT WebView::onGesture(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam, bool& handled)
+{
+    ASSERT(GetGestureInfoPtr());
+    ASSERT(CloseGestureInfoHandlePtr());
+    ASSERT(UpdatePanningFeedbackPtr());
+    ASSERT(BeginPanningFeedbackPtr());
+    ASSERT(EndPanningFeedbackPtr());
+
+    if (!GetGestureInfoPtr() || !CloseGestureInfoHandlePtr() || !UpdatePanningFeedbackPtr() || !BeginPanningFeedbackPtr() || !EndPanningFeedbackPtr()) {
+        handled = false;
+        return 0;
+    }
+
+    HGESTUREINFO gestureHandle = reinterpret_cast<HGESTUREINFO>(lParam);
+    GESTUREINFO gi = {0};
+    gi.cbSize = sizeof(GESTUREINFO);
+
+    if (!GetGestureInfoPtr()(gestureHandle, &gi)) {
+        handled = false;
+        return 0;
+    }
+
+    switch (gi.dwID) {
+    case GID_BEGIN:
+        m_lastPanX = gi.ptsLocation.x;
+        m_lastPanY = gi.ptsLocation.y;
+        break;
+    case GID_END:
+        m_page->gestureDidEnd();
+        break;
+    case GID_PAN: {
+        int currentX = gi.ptsLocation.x;
+        int currentY = gi.ptsLocation.y;
+
+        // Reverse the calculations because moving your fingers up should move the screen down, and
+        // vice-versa.
+        int deltaX = m_lastPanX - currentX;
+        int deltaY = m_lastPanY - currentY;
+
+        m_lastPanX = currentX;
+        m_lastPanY = currentY;
+
+        // Calculate the overpan for window bounce.
+        m_overPanY -= deltaY;
+
+        if (deltaX || deltaY)
+            m_page->gestureDidScroll(IntSize(deltaX, deltaY));
+
+        if (gi.dwFlags & GF_BEGIN) {
+            BeginPanningFeedbackPtr()(m_window);
+            m_gestureReachedScrollingLimit = false;
+            m_overPanY = 0;
+        } else if (gi.dwFlags & GF_END) {
+            EndPanningFeedbackPtr()(m_window, true);
+            m_overPanY = 0;
+        }
+
+        // FIXME: Support horizontal window bounce - <http://webkit.org/b/58068>.
+        // FIXME: Window Bounce doesn't undo until user releases their finger - <http://webkit.org/b/58069>.
+
+        if (m_gestureReachedScrollingLimit)
+            UpdatePanningFeedbackPtr()(m_window, 0, m_overPanY, gi.dwFlags & GF_INERTIA);
+
+        CloseGestureInfoHandlePtr()(gestureHandle);
+
+        handled = true;
+        return 0;
+    }
+    default:
+        break;
+    }
+
+    // If we get to this point, the gesture has not been handled. We forward
+    // the call to DefWindowProc by returning false, and we don't need to 
+    // to call CloseGestureInfoHandle. 
+    // http://msdn.microsoft.com/en-us/library/dd353228(VS.85).aspx
+    handled = false;
+    return 0;
+}
+
+LRESULT WebView::onKeyEvent(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam, bool& handled)
+{
+#if ENABLE(FULLSCREEN_API)
+    // Trap the ESC key when in full screen mode.
+    if (message == WM_KEYDOWN && wParam == VK_ESCAPE && m_fullScreenController && m_fullScreenController->isFullScreen()) {
+        m_fullScreenController->exitFullScreen();
+        return false;
+    }
+#endif
+
+    m_page->handleKeyboardEvent(NativeWebKeyboardEvent(hWnd, message, wParam, lParam));
+
+    // We claim here to always have handled the event. If the event is not in fact handled, we will
+    // find out later in didNotHandleKeyEvent.
+    handled = true;
+    return 0;
+}
+
+static void drawPageBackground(HDC dc, const WebPageProxy* page, const RECT& rect)
+{
+    if (!page->drawsBackground() || page->drawsTransparentBackground())
+        return;
+
+    ::FillRect(dc, &rect, reinterpret_cast<HBRUSH>(COLOR_WINDOW + 1));
+}
+
+void WebView::paint(HDC hdc, const IntRect& dirtyRect)
+{
+    m_page->endPrinting();
+    if (DrawingAreaProxyImpl* drawingArea = static_cast<DrawingAreaProxyImpl*>(m_page->drawingArea())) {
+        // FIXME: We should port WebKit1's rect coalescing logic here.
+        Region unpaintedRegion;
+        drawingArea->paint(hdc, dirtyRect, unpaintedRegion);
+
+        Vector<IntRect> unpaintedRects = unpaintedRegion.rects();
+        for (size_t i = 0; i < unpaintedRects.size(); ++i) {
+            RECT winRect = unpaintedRects[i];
+            drawPageBackground(hdc, m_page.get(), unpaintedRects[i]);
+        }
+    } else
+        drawPageBackground(hdc, m_page.get(), dirtyRect);
+
+    m_page->didDraw();
+}
+
+static void flashRects(HDC dc, const IntRect rects[], size_t rectCount, HBRUSH brush)
+{
+    for (size_t i = 0; i < rectCount; ++i) {
+        RECT winRect = rects[i];
+        ::FillRect(dc, &winRect, brush);
+    }
+
+    ::GdiFlush();
+    ::Sleep(50);
+}
+
+static OwnPtr<HBRUSH> createBrush(const Color& color)
+{
+    return adoptPtr(::CreateSolidBrush(RGB(color.red(), color.green(), color.blue())));
+}
+
+LRESULT WebView::onPaintEvent(HWND hWnd, UINT message, WPARAM, LPARAM, bool& handled)
+{
+    // Update child windows now so that any areas of our window they reveal will be included in the
+    // invalid region that ::BeginPaint sees.
+    updateChildWindowGeometries();
+
+    PAINTSTRUCT paintStruct;
+    HDC hdc = ::BeginPaint(m_window, &paintStruct);
+
+    if (WebPageProxy::debugPaintFlags() & kWKDebugFlashViewUpdates) {
+        static HBRUSH brush = createBrush(WebPageProxy::viewUpdatesFlashColor().rgb()).leakPtr();
+        IntRect rect = paintStruct.rcPaint;
+        flashRects(hdc, &rect, 1, brush);
+    }
+
+    paint(hdc, paintStruct.rcPaint);
+
+    ::EndPaint(m_window, &paintStruct);
+
+    handled = true;
+    return 0;
+}
+
+LRESULT WebView::onPrintClientEvent(HWND hWnd, UINT, WPARAM wParam, LPARAM, bool& handled)
+{
+    HDC hdc = reinterpret_cast<HDC>(wParam);
+    RECT winRect;
+    ::GetClientRect(hWnd, &winRect);
+
+    // Twidding the visibility flags tells the DrawingArea to resume painting. Right now, the
+    // the visible state of the view only affects whether or not painting happens, but in the
+    // future it could affect more, which we wouldn't want to touch here.
+
+    // FIXME: We should have a better way of telling the WebProcess to draw even if we're
+    // invisible than twiddling the visibility flag.
+
+    bool wasVisible = isViewVisible();
+    if (!wasVisible)
+        setIsVisible(true);
+
+    paint(hdc, winRect);
+
+    if (!wasVisible)
+        setIsVisible(false);
+
+    handled = true;
+    return 0;
+}
+
+LRESULT WebView::onSizeEvent(HWND, UINT, WPARAM, LPARAM lParam, bool& handled)
+{
+    int width = LOWORD(lParam);
+    int height = HIWORD(lParam);
+
+    if (m_page && m_page->drawingArea()) {
+        m_page->drawingArea()->setSize(IntSize(width, height), m_nextResizeScrollOffset);
+        m_nextResizeScrollOffset = IntSize();
+    }
+
+#if USE(ACCELERATED_COMPOSITING)
+    if (m_layerHostWindow)
+        ::MoveWindow(m_layerHostWindow, 0, 0, width, height, FALSE);
+#endif
+
+    handled = true;
+    return 0;
+}
+
+LRESULT WebView::onWindowPositionChangedEvent(HWND, UINT, WPARAM, LPARAM lParam, bool& handled)
+{
+    if (reinterpret_cast<WINDOWPOS*>(lParam)->flags & SWP_SHOWWINDOW)
+        updateActiveStateSoon();
+
+    handled = false;
+    return 0;
+}
+
+LRESULT WebView::onSetFocusEvent(HWND, UINT, WPARAM, LPARAM lParam, bool& handled)
+{
+    m_page->viewStateDidChange(WebPageProxy::ViewIsFocused);
+    handled = true;
+    return 0;
+}
+
+LRESULT WebView::onKillFocusEvent(HWND, UINT, WPARAM, LPARAM lParam, bool& handled)
+{
+    m_page->viewStateDidChange(WebPageProxy::ViewIsFocused);
+    handled = true;
+    return 0;
+}
+
+LRESULT WebView::onTimerEvent(HWND hWnd, UINT, WPARAM wParam, LPARAM, bool& handled)
+{
+    switch (wParam) {
+    case UpdateActiveStateTimer:
+        ::KillTimer(hWnd, UpdateActiveStateTimer);
+        updateActiveState();
+        break;
+    }
+
+    handled = true;
+    return 0;
+}
+
+LRESULT WebView::onShowWindowEvent(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam, bool& handled)
+{
+    // lParam is 0 when the message is sent because of a ShowWindow call.
+    // FIXME: Since we don't get notified when an ancestor window is hidden or shown, we will keep
+    // painting even when we have a hidden ancestor. <http://webkit.org/b/54104>
+    if (!lParam)
+        setIsVisible(wParam);
+
+    handled = false;
+    return 0;
+}
+
+LRESULT WebView::onSetCursor(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam, bool& handled)
+{
+    if (!m_lastCursorSet) {
+        handled = false;
+        return 0;
+    }
+
+    ::SetCursor(m_lastCursorSet);
+    return 0;
+}
+
+void WebView::updateActiveState()
+{
+    m_page->viewStateDidChange(WebPageProxy::ViewWindowIsActive);
+}
+
+void WebView::updateActiveStateSoon()
+{
+    // This function is called while processing the WM_NCACTIVATE message.
+    // While processing WM_NCACTIVATE when we are being deactivated, GetActiveWindow() will
+    // still return our window. If we were to call updateActiveState() in that case, we would
+    // wrongly think that we are still the active window. To work around this, we update our
+    // active state after a 0-delay timer fires, at which point GetActiveWindow() will return
+    // the newly-activated window.
+
+    ::SetTimer(m_window, UpdateActiveStateTimer, 0, 0);
+}
+
+static bool initCommonControls()
+{
+    static bool haveInitialized = false;
+    if (haveInitialized)
+        return true;
+
+    INITCOMMONCONTROLSEX init;
+    init.dwSize = sizeof(init);
+    init.dwICC = ICC_TREEVIEW_CLASSES;
+    haveInitialized = !!::InitCommonControlsEx(&init);
+    return haveInitialized;
+}
+
+void WebView::initializeToolTipWindow()
+{
+    if (!initCommonControls())
+        return;
+
+    m_toolTipWindow = ::CreateWindowEx(WS_EX_TRANSPARENT, TOOLTIPS_CLASS, 0, WS_POPUP | TTS_NOPREFIX | TTS_ALWAYSTIP,
+                                       CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT,
+                                       m_window, 0, 0, 0);
+    if (!m_toolTipWindow)
+        return;
+
+    TOOLINFO info = {0};
+    info.cbSize = sizeof(info);
+    info.uFlags = TTF_IDISHWND | TTF_SUBCLASS;
+    info.uId = reinterpret_cast<UINT_PTR>(m_window);
+
+    ::SendMessage(m_toolTipWindow, TTM_ADDTOOL, 0, reinterpret_cast<LPARAM>(&info));
+    ::SendMessage(m_toolTipWindow, TTM_SETMAXTIPWIDTH, 0, kMaxToolTipWidth);
+    ::SetWindowPos(m_toolTipWindow, HWND_TOP, 0, 0, 0, 0, SWP_NOMOVE | SWP_NOSIZE | SWP_NOACTIVATE);
+}
+
+void WebView::startTrackingMouseLeave()
+{
+    if (m_trackingMouseLeave)
+        return;
+    m_trackingMouseLeave = true;
+
+    TRACKMOUSEEVENT trackMouseEvent;
+    trackMouseEvent.cbSize = sizeof(TRACKMOUSEEVENT);
+    trackMouseEvent.dwFlags = TME_LEAVE;
+    trackMouseEvent.hwndTrack = m_window;
+
+    ::TrackMouseEvent(&trackMouseEvent);
+}
+
+void WebView::stopTrackingMouseLeave()
+{
+    if (!m_trackingMouseLeave)
+        return;
+    m_trackingMouseLeave = false;
+
+    TRACKMOUSEEVENT trackMouseEvent;
+    trackMouseEvent.cbSize = sizeof(TRACKMOUSEEVENT);
+    trackMouseEvent.dwFlags = TME_LEAVE | TME_CANCEL;
+    trackMouseEvent.hwndTrack = m_window;
+
+    ::TrackMouseEvent(&trackMouseEvent);
+}
+
+bool WebView::shouldInitializeTrackPointHack()
+{
+    static bool shouldCreateScrollbars;
+    static bool hasRunTrackPointCheck;
+
+    if (hasRunTrackPointCheck)
+        return shouldCreateScrollbars;
+
+    hasRunTrackPointCheck = true;
+    const wchar_t* trackPointKeys[] = { 
+        L"Software\\Lenovo\\TrackPoint",
+        L"Software\\Lenovo\\UltraNav",
+        L"Software\\Alps\\Apoint\\TrackPoint",
+        L"Software\\Synaptics\\SynTPEnh\\UltraNavUSB",
+        L"Software\\Synaptics\\SynTPEnh\\UltraNavPS2"
+    };
+
+    for (size_t i = 0; i < WTF_ARRAY_LENGTH(trackPointKeys); ++i) {
+        HKEY trackPointKey;
+        int readKeyResult = ::RegOpenKeyExW(HKEY_CURRENT_USER, trackPointKeys[i], 0, KEY_READ, &trackPointKey);
+        ::RegCloseKey(trackPointKey);
+        if (readKeyResult == ERROR_SUCCESS) {
+            shouldCreateScrollbars = true;
+            return shouldCreateScrollbars;
+        }
+    }
+
+    return shouldCreateScrollbars;
+}
+
+void WebView::close()
+{
+    m_undoClient.initialize(0);
+    ::RevokeDragDrop(m_window);
+    if (m_window) {
+        // We can't check IsWindow(m_window) here, because that will return true even while
+        // we're already handling WM_DESTROY. So we check !m_isBeingDestroyed instead.
+        if (!m_isBeingDestroyed)
+            DestroyWindow(m_window);
+        // Either we just destroyed m_window, or it's in the process of being destroyed. Either
+        // way, we clear it out to make sure we don't try to use it later.
+        m_window = 0;
+    }
+    setParentWindow(0);
+    m_page->close();
+}
+
+// PageClient
+
+PassOwnPtr<DrawingAreaProxy> WebView::createDrawingAreaProxy()
+{
+    return DrawingAreaProxyImpl::create(m_page.get());
+}
+
+void WebView::setViewNeedsDisplay(const WebCore::IntRect& rect)
+{
+    RECT r = rect;
+    ::InvalidateRect(m_window, &r, false);
+}
+
+void WebView::displayView()
+{
+    ::UpdateWindow(m_window);
+}
+
+void WebView::scrollView(const IntRect& scrollRect, const IntSize& scrollOffset)
+{
+    // FIXME: Actually scroll the view contents.
+    setViewNeedsDisplay(scrollRect);
+}
+
+void WebView::flashBackingStoreUpdates(const Vector<IntRect>& updateRects)
+{
+    static HBRUSH brush = createBrush(WebPageProxy::backingStoreUpdatesFlashColor().rgb()).leakPtr();
+    HDC dc = ::GetDC(m_window);
+    flashRects(dc, updateRects.data(), updateRects.size(), brush);
+    ::ReleaseDC(m_window, dc);
+}
+
+WebCore::IntSize WebView::viewSize()
+{
+    RECT clientRect;
+    GetClientRect(m_window, &clientRect);
+
+    return IntRect(clientRect).size();
+}
+
+bool WebView::isViewWindowActive()
+{    
+    HWND activeWindow = ::GetActiveWindow();
+    return (activeWindow && m_topLevelParentWindow == findTopLevelParentWindow(activeWindow));
+}
+
+bool WebView::isViewFocused()
+{
+    return ::GetFocus() == m_window;
+}
+
+bool WebView::isViewVisible()
+{
+    return m_isVisible;
+}
+
+bool WebView::isViewInWindow()
+{
+    return m_isInWindow;
+}
+
+void WebView::pageClosed()
+{
+}
+
+void WebView::processDidCrash()
+{
+    updateNativeCursor();
+    ::InvalidateRect(m_window, 0, TRUE);
+}
+
+void WebView::didRelaunchProcess()
+{
+    updateNativeCursor();
+    ::InvalidateRect(m_window, 0, TRUE);
+}
+
+void WebView::toolTipChanged(const String&, const String& newToolTip)
+{
+    if (!m_toolTipWindow)
+        return;
+
+    if (!newToolTip.isEmpty()) {
+        // This is necessary because String::charactersWithNullTermination() is not const.
+        String toolTip = newToolTip;
+
+        TOOLINFO info = {0};
+        info.cbSize = sizeof(info);
+        info.uFlags = TTF_IDISHWND;
+        info.uId = reinterpret_cast<UINT_PTR>(m_window);
+        info.lpszText = const_cast<UChar*>(toolTip.charactersWithNullTermination());
+        ::SendMessage(m_toolTipWindow, TTM_UPDATETIPTEXT, 0, reinterpret_cast<LPARAM>(&info));
+    }
+
+    ::SendMessage(m_toolTipWindow, TTM_ACTIVATE, !newToolTip.isEmpty(), 0);
+}
+
+HCURSOR WebView::cursorToShow() const
+{
+    if (!m_page->isValid())
+        return 0;
+
+    // We only show the override cursor if the default (arrow) cursor is showing.
+    static HCURSOR arrowCursor = ::LoadCursor(0, IDC_ARROW);
+    if (m_overrideCursor && m_webCoreCursor == arrowCursor)
+        return m_overrideCursor;
+
+    return m_webCoreCursor;
+}
+
+void WebView::updateNativeCursor()
+{
+    m_lastCursorSet = cursorToShow();
+    if (!m_lastCursorSet)
+        return;
+    ::SetCursor(m_lastCursorSet);
+}
+
+void WebView::setCursor(const WebCore::Cursor& cursor)
+{
+    if (!cursor.platformCursor()->nativeCursor())
+        return;
+    m_webCoreCursor = cursor.platformCursor()->nativeCursor();
+    updateNativeCursor();
+}
+
+void WebView::setCursorHiddenUntilMouseMoves(bool)
+{
+    notImplemented();
+}
+
+void WebView::setOverrideCursor(HCURSOR overrideCursor)
+{
+    m_overrideCursor = overrideCursor;
+    updateNativeCursor();
+}
+
+void WebView::setInitialFocus(bool forward, bool isKeyboardEventValid, const WebKeyboardEvent& event)
+{
+    m_page->setInitialFocus(forward, isKeyboardEventValid, event);
+}
+
+void WebView::setScrollOffsetOnNextResize(const IntSize& scrollOffset)
+{
+    // The next time we get a WM_SIZE message, scroll by the specified amount in onSizeEvent().
+    m_nextResizeScrollOffset = scrollOffset;
+}
+
+void WebView::didChangeViewportProperties(const WebCore::ViewportArguments&)
+{
+}
+
+void WebView::registerEditCommand(PassRefPtr<WebEditCommandProxy> prpCommand, WebPageProxy::UndoOrRedo undoOrRedo)
+{
+    RefPtr<WebEditCommandProxy> command = prpCommand;
+    m_undoClient.registerEditCommand(this, command, undoOrRedo);
+}
+
+void WebView::clearAllEditCommands()
+{
+    m_undoClient.clearAllEditCommands(this);
+}
+
+bool WebView::canUndoRedo(WebPageProxy::UndoOrRedo undoOrRedo)
+{
+    return m_undoClient.canUndoRedo(this, undoOrRedo);
+}
+
+void WebView::executeUndoRedo(WebPageProxy::UndoOrRedo undoOrRedo)
+{
+    m_undoClient.executeUndoRedo(this, undoOrRedo);
+}
+    
+void WebView::reapplyEditCommand(WebEditCommandProxy* command)
+{
+    if (!m_page->isValid() || !m_page->isValidEditCommand(command))
+        return;
+    
+    command->reapply();
+}
+
+void WebView::unapplyEditCommand(WebEditCommandProxy* command)
+{
+    if (!m_page->isValid() || !m_page->isValidEditCommand(command))
+        return;
+    
+    command->unapply();
+}
+
+void WebView::setCustomDropTarget(IDropTarget* dropTarget)
+{
+    if (!m_page->isValid() || !m_window)
+        return;
+
+    ::RevokeDragDrop(m_window);
+
+    if (dropTarget)
+        ::RegisterDragDrop(m_window, dropTarget);
+    else
+        ::RegisterDragDrop(m_window, this);
+}
+
+FloatRect WebView::convertToDeviceSpace(const FloatRect& rect)
+{
+    return rect;
+}
+
+IntPoint WebView::screenToWindow(const IntPoint& point)
+{
+    return point;
+}
+
+IntRect WebView::windowToScreen(const IntRect& rect)
+{
+    return rect;
+}
+
+FloatRect WebView::convertToUserSpace(const FloatRect& rect)
+{
+    return rect;
+}
+
+HIMC WebView::getIMMContext() 
+{
+    return Ime::ImmGetContext(m_window);
+}
+
+void WebView::prepareCandidateWindow(HIMC hInputContext) 
+{
+    IntRect caret = m_page->firstRectForCharacterInSelectedRange(0);
+    CANDIDATEFORM form;
+    form.dwIndex = 0;
+    form.dwStyle = CFS_EXCLUDE;
+    form.ptCurrentPos.x = caret.x();
+    form.ptCurrentPos.y = caret.maxY();
+    form.rcArea.top = caret.y();
+    form.rcArea.bottom = caret.maxY();
+    form.rcArea.left = caret.x();
+    form.rcArea.right = caret.maxX();
+    Ime::ImmSetCandidateWindow(hInputContext, &form);
+}
+
+void WebView::resetIME()
+{
+    HIMC hInputContext = getIMMContext();
+    if (!hInputContext)
+        return;
+    Ime::ImmNotifyIME(hInputContext, NI_COMPOSITIONSTR, CPS_CANCEL, 0);
+    Ime::ImmReleaseContext(m_window, hInputContext);
+}
+
+void WebView::setInputMethodState(bool enabled)
+{
+    Ime::ImmAssociateContextEx(m_window, 0, enabled ? IACE_DEFAULT : 0);
+}
+
+void WebView::compositionSelectionChanged(bool hasChanged)
+{
+    if (m_page->editorState().hasComposition && !hasChanged)
+        resetIME();
+}
+
+bool WebView::onIMEStartComposition()
+{
+    LOG(TextInput, "onIMEStartComposition");
+    m_inIMEComposition++;
+
+    HIMC hInputContext = getIMMContext();
+    if (!hInputContext)
+        return false;
+    prepareCandidateWindow(hInputContext);
+    Ime::ImmReleaseContext(m_window, hInputContext);
+    return true;
+}
+
+static bool getCompositionString(HIMC hInputContext, DWORD type, String& result)
+{
+    LONG compositionLength = Ime::ImmGetCompositionStringW(hInputContext, type, 0, 0);
+    if (compositionLength <= 0)
+        return false;
+    Vector<UChar> compositionBuffer(compositionLength / 2);
+    compositionLength = Ime::ImmGetCompositionStringW(hInputContext, type, compositionBuffer.data(), compositionLength);
+    result = String::adopt(compositionBuffer);
+    return true;
+}
+
+static void compositionToUnderlines(const Vector<DWORD>& clauses, const Vector<BYTE>& attributes, Vector<CompositionUnderline>& underlines)
+{
+    if (clauses.isEmpty()) {
+        underlines.clear();
+        return;
+    }
+  
+    size_t numBoundaries = clauses.size() - 1;
+    underlines.resize(numBoundaries);
+    for (unsigned i = 0; i < numBoundaries; ++i) {
+        underlines[i].startOffset = clauses[i];
+        underlines[i].endOffset = clauses[i + 1];
+        BYTE attribute = attributes[clauses[i]];
+        underlines[i].thick = attribute == ATTR_TARGET_CONVERTED || attribute == ATTR_TARGET_NOTCONVERTED;
+        underlines[i].color = Color::black;
+    }
+}
+
+#if !LOG_DISABLED
+#define APPEND_ARGUMENT_NAME(name) \
+    if (lparam & name) { \
+        if (needsComma) \
+            result += ", "; \
+            result += #name; \
+        needsComma = true; \
+    }
+
+static String imeCompositionArgumentNames(LPARAM lparam)
+{
+    String result;
+    bool needsComma = false;
+
+    APPEND_ARGUMENT_NAME(GCS_COMPATTR);
+    APPEND_ARGUMENT_NAME(GCS_COMPCLAUSE);
+    APPEND_ARGUMENT_NAME(GCS_COMPREADSTR);
+    APPEND_ARGUMENT_NAME(GCS_COMPREADATTR);
+    APPEND_ARGUMENT_NAME(GCS_COMPREADCLAUSE);
+    APPEND_ARGUMENT_NAME(GCS_COMPSTR);
+    APPEND_ARGUMENT_NAME(GCS_CURSORPOS);
+    APPEND_ARGUMENT_NAME(GCS_DELTASTART);
+    APPEND_ARGUMENT_NAME(GCS_RESULTCLAUSE);
+    APPEND_ARGUMENT_NAME(GCS_RESULTREADCLAUSE);
+    APPEND_ARGUMENT_NAME(GCS_RESULTREADSTR);
+    APPEND_ARGUMENT_NAME(GCS_RESULTSTR);
+    APPEND_ARGUMENT_NAME(CS_INSERTCHAR);
+    APPEND_ARGUMENT_NAME(CS_NOMOVECARET);
+
+    return result;
+}
+
+static String imeRequestName(WPARAM wparam)
+{
+    switch (wparam) {
+    case IMR_CANDIDATEWINDOW:
+        return "IMR_CANDIDATEWINDOW";
+    case IMR_COMPOSITIONFONT:
+        return "IMR_COMPOSITIONFONT";
+    case IMR_COMPOSITIONWINDOW:
+        return "IMR_COMPOSITIONWINDOW";
+    case IMR_CONFIRMRECONVERTSTRING:
+        return "IMR_CONFIRMRECONVERTSTRING";
+    case IMR_DOCUMENTFEED:
+        return "IMR_DOCUMENTFEED";
+    case IMR_QUERYCHARPOSITION:
+        return "IMR_QUERYCHARPOSITION";
+    case IMR_RECONVERTSTRING:
+        return "IMR_RECONVERTSTRING";
+    default:
+        return "Unknown (" + String::number(wparam) + ")";
+    }
+}
+#endif
+
+bool WebView::onIMEComposition(LPARAM lparam)
+{
+    LOG(TextInput, "onIMEComposition %s", imeCompositionArgumentNames(lparam).latin1().data());
+    HIMC hInputContext = getIMMContext();
+    if (!hInputContext)
+        return true;
+
+    if (!m_page->editorState().isContentEditable)
+        return true;
+
+    prepareCandidateWindow(hInputContext);
+
+    if (lparam & GCS_RESULTSTR || !lparam) {
+        String compositionString;
+        if (!getCompositionString(hInputContext, GCS_RESULTSTR, compositionString) && lparam)
+            return true;
+        
+        m_page->confirmComposition(compositionString);
+        return true;
+    }
+
+    String compositionString;
+    if (!getCompositionString(hInputContext, GCS_COMPSTR, compositionString))
+        return true;
+    
+    // Composition string attributes
+    int numAttributes = Ime::ImmGetCompositionStringW(hInputContext, GCS_COMPATTR, 0, 0);
+    Vector<BYTE> attributes(numAttributes);
+    Ime::ImmGetCompositionStringW(hInputContext, GCS_COMPATTR, attributes.data(), numAttributes);
+
+    // Get clauses
+    int numBytes = Ime::ImmGetCompositionStringW(hInputContext, GCS_COMPCLAUSE, 0, 0);
+    Vector<DWORD> clauses(numBytes / sizeof(DWORD));
+    Ime::ImmGetCompositionStringW(hInputContext, GCS_COMPCLAUSE, clauses.data(), numBytes);
+
+    Vector<CompositionUnderline> underlines;
+    compositionToUnderlines(clauses, attributes, underlines);
+
+    int cursorPosition = LOWORD(Ime::ImmGetCompositionStringW(hInputContext, GCS_CURSORPOS, 0, 0));
+
+    m_page->setComposition(compositionString, underlines, cursorPosition);
+
+    return true;
+}
+
+bool WebView::onIMEEndComposition()
+{
+    LOG(TextInput, "onIMEEndComposition");
+    // If the composition hasn't been confirmed yet, it needs to be cancelled.
+    // This happens after deleting the last character from inline input hole.
+    if (m_page->editorState().hasComposition)
+        m_page->confirmComposition(String());
+
+    if (m_inIMEComposition)
+        m_inIMEComposition--;
+
+    return true;
+}
+
+LRESULT WebView::onIMERequestCharPosition(IMECHARPOSITION* charPos)
+{
+    if (charPos->dwCharPos && !m_page->editorState().hasComposition)
+        return 0;
+    IntRect caret = m_page->firstRectForCharacterInSelectedRange(charPos->dwCharPos);
+    charPos->pt.x = caret.x();
+    charPos->pt.y = caret.y();
+    ::ClientToScreen(m_window, &charPos->pt);
+    charPos->cLineHeight = caret.height();
+    ::GetWindowRect(m_window, &charPos->rcDocument);
+    return true;
+}
+
+LRESULT WebView::onIMERequestReconvertString(RECONVERTSTRING* reconvertString)
+{
+    String text = m_page->getSelectedText();
+    unsigned totalSize = sizeof(RECONVERTSTRING) + text.length() * sizeof(UChar);
+    
+    if (!reconvertString)
+        return totalSize;
+
+    if (totalSize > reconvertString->dwSize)
+        return 0;
+    reconvertString->dwCompStrLen = text.length();
+    reconvertString->dwStrLen = text.length();
+    reconvertString->dwTargetStrLen = text.length();
+    reconvertString->dwStrOffset = sizeof(RECONVERTSTRING);
+    memcpy(reconvertString + 1, text.characters(), text.length() * sizeof(UChar));
+    return totalSize;
+}
+
+LRESULT WebView::onIMERequest(WPARAM request, LPARAM data)
+{
+    LOG(TextInput, "onIMERequest %s", imeRequestName(request).latin1().data());
+    if (!m_page->editorState().isContentEditable)
+        return 0;
+
+    switch (request) {
+    case IMR_RECONVERTSTRING:
+        return onIMERequestReconvertString(reinterpret_cast<RECONVERTSTRING*>(data));
+
+    case IMR_QUERYCHARPOSITION:
+        return onIMERequestCharPosition(reinterpret_cast<IMECHARPOSITION*>(data));
+    }
+    return 0;
+}
+
+bool WebView::onIMESelect(WPARAM wparam, LPARAM lparam)
+{
+    UNUSED_PARAM(wparam);
+    UNUSED_PARAM(lparam);
+    LOG(TextInput, "onIMESelect locale %ld %s", lparam, wparam ? "select" : "deselect");
+    return false;
+}
+
+bool WebView::onIMESetContext(WPARAM wparam, LPARAM)
+{
+    LOG(TextInput, "onIMESetContext %s", wparam ? "active" : "inactive");
+    return false;
+}
+
+void WebView::doneWithKeyEvent(const NativeWebKeyboardEvent& event, bool wasEventHandled)
+{
+    // Calling ::DefWindowProcW will ensure that pressing the Alt key will generate a WM_SYSCOMMAND
+    // event, e.g. See <http://webkit.org/b/47671>.
+    if (!wasEventHandled)
+        ::DefWindowProcW(event.nativeEvent()->hwnd, event.nativeEvent()->message, event.nativeEvent()->wParam, event.nativeEvent()->lParam);
+}
+
+PassRefPtr<WebPopupMenuProxy> WebView::createPopupMenuProxy(WebPageProxy* page)
+{
+    return WebPopupMenuProxyWin::create(this, page);
+}
+
+PassRefPtr<WebContextMenuProxy> WebView::createContextMenuProxy(WebPageProxy* page)
+{
+    return WebContextMenuProxyWin::create(m_window, page);
+}
+
+void WebView::setFindIndicator(PassRefPtr<FindIndicator> prpFindIndicator, bool fadeOut, bool animate)
+{
+    UNUSED_PARAM(animate);
+
+    if (!m_findIndicatorCallback)
+        return;
+
+    HBITMAP hbmp = 0;
+    IntRect selectionRect;
+
+    if (RefPtr<FindIndicator> findIndicator = prpFindIndicator) {
+        if (ShareableBitmap* contentImage = findIndicator->contentImage()) {
+            // Render the contentImage to an HBITMAP.
+            void* bits;
+            HDC hdc = ::CreateCompatibleDC(0);
+            int width = contentImage->bounds().width();
+            int height = contentImage->bounds().height();
+            BitmapInfo bitmapInfo = BitmapInfo::create(contentImage->size());
+
+            hbmp = CreateDIBSection(0, &bitmapInfo, DIB_RGB_COLORS, static_cast<void**>(&bits), 0, 0);
+            HBITMAP hbmpOld = static_cast<HBITMAP>(SelectObject(hdc, hbmp));
+#if USE(CG)
+            RetainPtr<CGContextRef> context(AdoptCF, CGBitmapContextCreate(bits, width, height,
+                8, width * sizeof(RGBQUAD), deviceRGBColorSpaceRef(), kCGBitmapByteOrder32Little | kCGImageAlphaPremultipliedFirst));
+
+            GraphicsContext graphicsContext(context.get());
+            contentImage->paint(graphicsContext, IntPoint(), contentImage->bounds());
+#else
+            // FIXME: Implement!
+#endif
+
+            ::SelectObject(hdc, hbmpOld);
+            ::DeleteDC(hdc);
+        }
+
+        selectionRect = IntRect(findIndicator->selectionRectInWindowCoordinates());
+    }
+    
+    // The callback is responsible for calling ::DeleteObject(hbmp).
+    (*m_findIndicatorCallback)(toAPI(this), hbmp, selectionRect, fadeOut, m_findIndicatorCallbackContext);
+}
+
+void WebView::setFindIndicatorCallback(WKViewFindIndicatorCallback callback, void* context)
+{
+    m_findIndicatorCallback = callback;
+    m_findIndicatorCallbackContext = context;
+}
+
+WKViewFindIndicatorCallback WebView::getFindIndicatorCallback(void** context)
+{
+    if (context)
+        *context = m_findIndicatorCallbackContext;
+    
+    return m_findIndicatorCallback;
+}
+
+void WebView::didInstallOrUninstallPageOverlay(bool didInstall)
+{
+    m_pageOverlayInstalled = didInstall;
+}
+
+void WebView::didCommitLoadForMainFrame(bool useCustomRepresentation)
+{
+}
+
+void WebView::didFinishLoadingDataForCustomRepresentation(const String& suggestedFilename, const CoreIPC::DataReference&)
+{
+}
+
+double WebView::customRepresentationZoomFactor()
+{
+    return 1;
+}
+
+void WebView::setCustomRepresentationZoomFactor(double)
+{
+}
+
+void WebView::didChangeScrollbarsForMainFrame() const
+{
+}
+
+void WebView::findStringInCustomRepresentation(const String&, FindOptions, unsigned)
+{
+}
+
+void WebView::countStringMatchesInCustomRepresentation(const String&, FindOptions, unsigned)
+{
+}
+
+void WebView::setIsInWindow(bool isInWindow)
+{
+    m_isInWindow = isInWindow;
+    m_page->viewStateDidChange(WebPageProxy::ViewIsInWindow);
+}
+
+void WebView::setIsVisible(bool isVisible)
+{
+    m_isVisible = isVisible;
+
+    if (m_page)
+        m_page->viewStateDidChange(WebPageProxy::ViewIsVisible);
+}
+
+#if USE(ACCELERATED_COMPOSITING)
+
+void WebView::enterAcceleratedCompositingMode(const LayerTreeContext& context)
+{
+#if HAVE(WKQCA)
+    ASSERT(!context.isEmpty());
+
+    m_layerHostWindow = context.window;
+
+    IntSize size = viewSize();
+    // Ensure the layer host window is behind all other child windows (since otherwise it would obscure them).
+    ::SetWindowPos(m_layerHostWindow, HWND_BOTTOM, 0, 0, size.width(), size.height(), SWP_SHOWWINDOW | SWP_NOACTIVATE);
+#else
+    ASSERT_NOT_REACHED();
+#endif
+}
+
+void WebView::exitAcceleratedCompositingMode()
+{
+#if HAVE(WKQCA)
+    ASSERT(m_layerHostWindow);
+
+    // Tell the WKCACFViewWindow to destroy itself. We can't call ::DestroyWindow directly because
+    // the window is owned by another thread.
+    ::PostMessageW(m_layerHostWindow, WKCACFViewWindow::customDestroyMessage, 0, 0);
+    m_layerHostWindow = 0;
+#else
+    ASSERT_NOT_REACHED();
+#endif
+}
+
+#endif // USE(ACCELERATED_COMPOSITING)
+
+HWND WebView::nativeWindow()
+{
+    return m_window;
+}
+
+void WebView::scheduleChildWindowGeometryUpdate(const WindowGeometry& geometry)
+{
+    m_geometriesUpdater.addPendingUpdate(geometry);
+}
+
+void WebView::updateChildWindowGeometries()
+{
+    m_geometriesUpdater.updateGeometries(DoNotBringToTop);
+}
+
+// WebCore::WindowMessageListener
+
+void WebView::windowReceivedMessage(HWND, UINT message, WPARAM wParam, LPARAM)
+{
+    switch (message) {
+    case WM_NCACTIVATE:
+        updateActiveStateSoon();
+        break;
+    case WM_SETTINGCHANGE:
+        // systemParameterChanged(wParam);
+        break;
+    }
+}
+
+HRESULT STDMETHODCALLTYPE WebView::QueryInterface(REFIID riid, void** ppvObject)
+{
+    *ppvObject = 0;
+    if (IsEqualGUID(riid, IID_IUnknown))
+        *ppvObject = static_cast<IUnknown*>(this);
+    else if (IsEqualGUID(riid, IID_IDropTarget))
+        *ppvObject = static_cast<IDropTarget*>(this);
+    else
+        return E_NOINTERFACE;
+
+    AddRef();
+    return S_OK;
+}
+
+ULONG STDMETHODCALLTYPE WebView::AddRef(void)
+{
+    ref();
+    return refCount();
+}
+
+ULONG STDMETHODCALLTYPE WebView::Release(void)
+{
+    deref();
+    return refCount();
+}
+
+static DWORD dragOperationToDragCursor(DragOperation op)
+{
+    DWORD res = DROPEFFECT_NONE;
+    if (op & DragOperationCopy) 
+        res = DROPEFFECT_COPY;
+    else if (op & DragOperationLink) 
+        res = DROPEFFECT_LINK;
+    else if (op & DragOperationMove) 
+        res = DROPEFFECT_MOVE;
+    else if (op & DragOperationGeneric) 
+        res = DROPEFFECT_MOVE; // This appears to be the Firefox behaviour
+    return res;
+}
+
+WebCore::DragOperation WebView::keyStateToDragOperation(DWORD grfKeyState) const
+{
+    if (!m_page)
+        return DragOperationNone;
+
+    // Conforms to Microsoft's key combinations as documented for 
+    // IDropTarget::DragOver. Note, grfKeyState is the current 
+    // state of the keyboard modifier keys on the keyboard. See:
+    // <http://msdn.microsoft.com/en-us/library/ms680129(VS.85).aspx>.
+    DragOperation operation = m_page->dragSession().operation;
+
+    if ((grfKeyState & (MK_CONTROL | MK_SHIFT)) == (MK_CONTROL | MK_SHIFT))
+        operation = DragOperationLink;
+    else if ((grfKeyState & MK_CONTROL) == MK_CONTROL)
+        operation = DragOperationCopy;
+    else if ((grfKeyState & MK_SHIFT) == MK_SHIFT)
+        operation = DragOperationGeneric;
+
+    return operation;
+}
+
+HRESULT STDMETHODCALLTYPE WebView::DragEnter(IDataObject* pDataObject, DWORD grfKeyState, POINTL pt, DWORD* pdwEffect)
+{
+    m_dragData = 0;
+    m_page->resetDragOperation();
+
+    if (m_dropTargetHelper)
+        m_dropTargetHelper->DragEnter(m_window, pDataObject, (POINT*)&pt, *pdwEffect);
+
+    POINTL localpt = pt;
+    ::ScreenToClient(m_window, (LPPOINT)&localpt);
+    DragData data(pDataObject, IntPoint(localpt.x, localpt.y), IntPoint(pt.x, pt.y), keyStateToDragOperation(grfKeyState));
+    m_page->dragEntered(&data);
+    *pdwEffect = dragOperationToDragCursor(m_page->dragSession().operation);
+
+    m_lastDropEffect = *pdwEffect;
+    m_dragData = pDataObject;
+
+    return S_OK;
+}
+
+HRESULT STDMETHODCALLTYPE WebView::DragOver(DWORD grfKeyState, POINTL pt, DWORD* pdwEffect)
+{
+    if (m_dropTargetHelper)
+        m_dropTargetHelper->DragOver((POINT*)&pt, *pdwEffect);
+
+    if (m_dragData) {
+        POINTL localpt = pt;
+        ::ScreenToClient(m_window, (LPPOINT)&localpt);
+        DragData data(m_dragData.get(), IntPoint(localpt.x, localpt.y), IntPoint(pt.x, pt.y), keyStateToDragOperation(grfKeyState));
+        m_page->dragUpdated(&data);
+        *pdwEffect = dragOperationToDragCursor(m_page->dragSession().operation);
+    } else
+        *pdwEffect = DROPEFFECT_NONE;
+
+    m_lastDropEffect = *pdwEffect;
+    return S_OK;
+}
+
+HRESULT STDMETHODCALLTYPE WebView::DragLeave()
+{
+    if (m_dropTargetHelper)
+        m_dropTargetHelper->DragLeave();
+
+    if (m_dragData) {
+        DragData data(m_dragData.get(), IntPoint(), IntPoint(), DragOperationNone);
+        m_page->dragExited(&data);
+        m_dragData = 0;
+        m_page->resetDragOperation();
+    }
+    return S_OK;
+}
+
+HRESULT STDMETHODCALLTYPE WebView::Drop(IDataObject* pDataObject, DWORD grfKeyState, POINTL pt, DWORD* pdwEffect)
+{
+    if (m_dropTargetHelper)
+        m_dropTargetHelper->Drop(pDataObject, (POINT*)&pt, *pdwEffect);
+
+    m_dragData = 0;
+    *pdwEffect = m_lastDropEffect;
+    POINTL localpt = pt;
+    ::ScreenToClient(m_window, (LPPOINT)&localpt);
+    DragData data(pDataObject, IntPoint(localpt.x, localpt.y), IntPoint(pt.x, pt.y), keyStateToDragOperation(grfKeyState));
+
+    SandboxExtension::Handle sandboxExtensionHandle;
+    m_page->performDrag(&data, String(), sandboxExtensionHandle);
+    return S_OK;
+}
+
+#if ENABLE(FULLSCREEN_API)
+FullScreenController* WebView::fullScreenController()
+{
+    if (!m_fullScreenController)
+        m_fullScreenController = adoptPtr(new FullScreenController(this));
+    return m_fullScreenController.get();
+}
+
+HWND WebView::fullScreenClientWindow() const
+{
+    return m_window;
+}
+
+HWND WebView::fullScreenClientParentWindow() const
+{
+    return ::GetParent(m_window);
+}
+
+void WebView::fullScreenClientSetParentWindow(HWND hostWindow)
+{
+    setParentWindow(hostWindow);
+}
+
+void WebView::fullScreenClientWillEnterFullScreen()
+{
+    page()->fullScreenManager()->willEnterFullScreen();
+}
+
+void WebView::fullScreenClientDidEnterFullScreen()
+{
+    page()->fullScreenManager()->didEnterFullScreen();
+}
+
+void WebView::fullScreenClientWillExitFullScreen()
+{
+    page()->fullScreenManager()->willExitFullScreen();
+}
+
+void WebView::fullScreenClientDidExitFullScreen()
+{
+    page()->fullScreenManager()->didExitFullScreen();
+}
+
+static void fullScreenClientForceRepaintCompleted(WKErrorRef, void* context)
+{
+    ASSERT(context);
+    static_cast<WebView*>(context)->fullScreenController()->repaintCompleted();
+}
+
+void WebView::fullScreenClientForceRepaint()
+{
+    page()->forceRepaint(VoidCallback::create(this, &fullScreenClientForceRepaintCompleted));
+}
+
+#endif
+} // namespace WebKit