Bug 513162 - Win support for custom chrome margins on windows. r=tellrob.

This commit is contained in:
Jim Mathies 2010-06-24 21:01:07 -05:00
Родитель 6516a2bcdb
Коммит 4e3537e998
4 изменённых файлов: 364 добавлений и 30 удалений

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@ -92,6 +92,7 @@ nsUXThemeData::DwmSetIconicThumbnailProc nsUXThemeData::dwmSetIconicThumbnailPtr
nsUXThemeData::DwmSetIconicLivePreviewBitmapProc nsUXThemeData::dwmSetIconicLivePreviewBitmapPtr = NULL;
nsUXThemeData::DwmSetWindowAttributeProc nsUXThemeData::dwmSetWindowAttributePtr = NULL;
nsUXThemeData::DwmInvalidateIconicBitmapsProc nsUXThemeData::dwmInvalidateIconicBitmapsPtr = NULL;
nsUXThemeData::DwmDefWindowProcProc nsUXThemeData::dwmDwmDefWindowProcPtr = NULL;
#endif
void
@ -136,6 +137,7 @@ nsUXThemeData::Initialize()
dwmSetIconicLivePreviewBitmapPtr = (DwmSetIconicLivePreviewBitmapProc)::GetProcAddress(sDwmDLL, "DwmSetIconicLivePreviewBitmap");
dwmSetWindowAttributePtr = (DwmSetWindowAttributeProc)::GetProcAddress(sDwmDLL, "DwmSetWindowAttribute");
dwmInvalidateIconicBitmapsPtr = (DwmInvalidateIconicBitmapsProc)::GetProcAddress(sDwmDLL, "DwmInvalidateIconicBitmaps");
dwmDwmDefWindowProcPtr = (DwmDefWindowProcProc)::GetProcAddress(sDwmDLL, "DwmDefWindowProc");
CheckForCompositor();
}
#endif

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@ -178,6 +178,7 @@ public:
typedef HRESULT (WINAPI*DwmSetIconicLivePreviewBitmapProc)(HWND hWnd, HBITMAP hBitmap, POINT *pptClient, DWORD dwSITFlags);
typedef HRESULT (WINAPI*DwmSetWindowAttributeProc)(HWND hWnd, DWORD dwAttribute, LPCVOID pvAttribute, DWORD cbAttribute);
typedef HRESULT (WINAPI*DwmInvalidateIconicBitmapsProc)(HWND hWnd);
typedef HRESULT (WINAPI*DwmDefWindowProcProc)(HWND hWnd, UINT msg, LPARAM lParam, WPARAM wParam, LRESULT *aRetValue);
static DwmExtendFrameIntoClientAreaProc dwmExtendFrameIntoClientAreaPtr;
static DwmIsCompositionEnabledProc dwmIsCompositionEnabledPtr;
@ -185,6 +186,7 @@ public:
static DwmSetIconicLivePreviewBitmapProc dwmSetIconicLivePreviewBitmapPtr;
static DwmSetWindowAttributeProc dwmSetWindowAttributePtr;
static DwmInvalidateIconicBitmapsProc dwmInvalidateIconicBitmapsPtr;
static DwmDefWindowProcProc dwmDwmDefWindowProcPtr;
static PRBool CheckForCompositor() {
BOOL compositionIsEnabled = FALSE;

Просмотреть файл

@ -141,6 +141,7 @@
#include "nsIFontMetrics.h"
#include "nsIFontEnumerator.h"
#include "nsIDeviceContext.h"
#include "nsILookAndFeel.h"
#include "nsGUIEvent.h"
#include "nsFont.h"
#include "nsRect.h"
@ -370,10 +371,13 @@ nsWindow::nsWindow() : nsBaseWidget()
mIsInMouseCapture = PR_FALSE;
mIsTopWidgetWindow = PR_FALSE;
mUnicodeWidget = PR_TRUE;
mDisplayPanFeedback = PR_FALSE;
mCustomNonClient = PR_FALSE;
mCompositorFlag = PR_FALSE;
mHideChrome = PR_FALSE;
mWindowType = eWindowType_child;
mBorderStyle = eBorderStyle_default;
mPopupType = ePopupTypeAny;
mDisplayPanFeedback = PR_FALSE;
mLastPoint.x = 0;
mLastPoint.y = 0;
mLastSize.width = 0;
@ -1719,8 +1723,8 @@ NS_METHOD nsWindow::SetFocus(PRBool aRaise)
*
* SECTION: Bounds
*
* nsIWidget::GetBounds, nsIWidget::GetScreenBounds,
* nsIWidget::GetClientBounds
* GetBounds, GetClientBounds, GetScreenBounds, GetClientOffset
* SetDrawsInTitlebar, GetNonClientMargins, SetNonClientMargins
*
* Bound calculations.
*
@ -1843,6 +1847,166 @@ NS_METHOD nsWindow::GetClientOffset(nsIntPoint &aPt)
return NS_OK;
}
void
nsWindow::SetDrawsInTitlebar(PRBool aState)
{
nsWindow * window = GetTopLevelWindow(PR_TRUE);
if (window && window != this) {
return window->SetDrawsInTitlebar(aState);
}
if (aState) {
// left, top, right, bottom for nsIntMargin
nsIntMargin margins(-1, 0, -1, -1);
SetNonClientMargins(margins);
}
else {
nsIntMargin margins(-1, -1, -1, -1);
SetNonClientMargins(margins);
}
}
NS_IMETHODIMP
nsWindow::GetNonClientMargins(nsIntMargin &margins)
{
nsWindow * window = GetTopLevelWindow(PR_TRUE);
if (window && window != this) {
return window->GetNonClientMargins(margins);
}
if (mCustomNonClient) {
margins = mNonClientMargins;
return NS_OK;
}
nsCOMPtr<nsILookAndFeel> lookAndFeel =
do_GetService("@mozilla.org/widget/lookandfeel;1");
if (!lookAndFeel) {
NS_WARNING("We need nsILookAndFeel for GetNonClientMargins!");
return NS_ERROR_FAILURE;
}
PRInt32 val;
lookAndFeel->GetMetric(nsILookAndFeel::eMetric_WindowTitleHeight, val);
margins.top = val;
lookAndFeel->GetMetric(nsILookAndFeel::eMetric_WindowBorderHeight, val);
margins.top += val;
margins.bottom = val;
lookAndFeel->GetMetric(nsILookAndFeel::eMetric_WindowBorderWidth, val);
margins.left = margins.right = val;
return NS_OK;
}
PRBool
nsWindow::UpdateNonClientMargins()
{
if (!mCustomNonClient)
return PR_FALSE;
// XXX Temp disable margins until frame rendering is supported
mCompositorFlag = PR_TRUE;
if(!nsUXThemeData::CheckForCompositor()) {
mCompositorFlag = PR_FALSE;
return PR_FALSE;
}
mNonClientOffset.top = mNonClientOffset.bottom =
mNonClientOffset.left = mNonClientOffset.right = 0;
nsCOMPtr<nsILookAndFeel> lookAndFeel =
do_GetService("@mozilla.org/widget/lookandfeel;1");
if (!lookAndFeel) {
NS_WARNING("We need nsILookAndFeel for UpdateNonClientMargins!");
return PR_FALSE;
}
// Used in hit testing, provides the resize cursor margin
lookAndFeel->GetMetric(nsILookAndFeel::eMetric_WindowBorderWidth, mResizeMargin);
lookAndFeel->GetMetric(nsILookAndFeel::eMetric_WindowTitleHeight, mCaptionHeight);
mCaptionHeight += mResizeMargin;
// If a margin value is 0, set the offset to the default size of the frame.
// If a margin is -1, leave as default, and if a margin > 0, set the offset
// so that the frame size is equal to the margin value.
if (!mNonClientMargins.top)
mNonClientOffset.top = mCaptionHeight;
else if (mNonClientMargins.top > 0)
mNonClientOffset.top = mCaptionHeight - mNonClientMargins.top;
if (!mNonClientMargins.left)
mNonClientOffset.left = mResizeMargin;
else if (mNonClientMargins.left > 0)
mNonClientOffset.left = mResizeMargin - mNonClientMargins.left;
if (!mNonClientMargins.right)
mNonClientOffset.right = mResizeMargin;
else if (mNonClientMargins.right > 0)
mNonClientOffset.right = mResizeMargin - mNonClientMargins.right;
PRInt32 val;
lookAndFeel->GetMetric(nsILookAndFeel::eMetric_WindowBorderHeight, val);
if (!mNonClientMargins.bottom)
mNonClientOffset.bottom = val;
else if (mNonClientMargins.bottom > 0)
mNonClientOffset.bottom = val - mNonClientMargins.bottom;
NS_ASSERTION(mNonClientOffset.top >= 0, "non-client top margin is negative!");
NS_ASSERTION(mNonClientOffset.left >= 0, "non-client left margin is negative!");
NS_ASSERTION(mNonClientOffset.right >= 0, "non-client right margin is negative!");
NS_ASSERTION(mNonClientOffset.bottom >= 0, "non-client bottom margin is negative!");
if (mNonClientOffset.top < 0)
mNonClientOffset.top = 0;
if (mNonClientOffset.left < 0)
mNonClientOffset.left = 0;
if (mNonClientOffset.right < 0)
mNonClientOffset.right = 0;
if (mNonClientOffset.bottom < 0)
mNonClientOffset.bottom = 0;
SetWindowPos(mWnd, 0, 0, 0, 0, 0,
SWP_FRAMECHANGED|SWP_NOACTIVATE|SWP_NOMOVE|
SWP_NOOWNERZORDER|SWP_NOSIZE|SWP_NOZORDER);
UpdateWindow(mWnd);
return PR_TRUE;
}
NS_IMETHODIMP
nsWindow::SetNonClientMargins(nsIntMargin &margins)
{
if (!mIsTopWidgetWindow ||
mBorderStyle & eBorderStyle_none ||
mHideChrome)
return NS_ERROR_INVALID_ARG;
// Request for a reset
if (margins.top == -1 && margins.left == -1 &&
margins.right == -1 && margins.bottom == -1) {
mCustomNonClient = PR_FALSE;
mNonClientMargins = margins;
SetWindowPos(mWnd, 0, 0, 0, 0, 0,
SWP_FRAMECHANGED|SWP_NOACTIVATE|SWP_NOMOVE|
SWP_NOOWNERZORDER|SWP_NOSIZE|SWP_NOZORDER);
UpdateWindow(mWnd);
return NS_OK;
}
if (margins.top < -1 || margins.bottom < -1 ||
margins.left < -1 || margins.right < -1)
return NS_ERROR_INVALID_ARG;
mNonClientMargins = margins;
mCustomNonClient = PR_TRUE;
if (!UpdateNonClientMargins()) {
NS_WARNING("UpdateNonClientMargins failed!");
return PR_FALSE;
}
return NS_OK;
}
/**************************************************************
*
* SECTION: nsIWidget::SetBackgroundColor
@ -2145,11 +2309,16 @@ void nsWindow::UpdatePossiblyTransparentRegion(const nsIntRegion &aDirtyRegion,
opaqueRegion.Or(opaqueRegion, childWindowRegion);
// Sometimes child windows overlap our bounds
opaqueRegion.And(opaqueRegion, clientBounds);
MARGINS margins = { 0, 0, 0, 0 };
DWORD_PTR dwStyle = ::GetWindowLongPtrW(hWnd, GWL_STYLE);
// If there is no opaque region or hidechrome=true then full glass
if (opaqueRegion.IsEmpty() || !(dwStyle & WS_CAPTION)) {
margins.cxLeftWidth = -1;
// If there is no opaque region or hidechrome=true, set margins
// to support a full sheet of glass.
if (opaqueRegion.IsEmpty() || mHideChrome) {
// Comments in MSDN indicate all values must be set to -1
margins.cxLeftWidth = margins.cxRightWidth =
margins.cyTopHeight = margins.cyBottomHeight = -1;
} else {
// Find the largest rectangle and use that to calculate the inset
nsIntRect largest = opaqueRegion.GetLargestRectangle();
@ -2158,6 +2327,8 @@ void nsWindow::UpdatePossiblyTransparentRegion(const nsIntRegion &aDirtyRegion,
margins.cyTopHeight = largest.y;
margins.cyBottomHeight = clientBounds.height - largest.YMost();
}
// Only update glass area if there are changes
if (memcmp(&mGlassMargins, &margins, sizeof mGlassMargins)) {
mGlassMargins = margins;
UpdateGlass();
@ -2165,13 +2336,21 @@ void nsWindow::UpdatePossiblyTransparentRegion(const nsIntRegion &aDirtyRegion,
#endif // #if MOZ_WINSDK_TARGETVER >= MOZ_NTDDI_LONGHORN
}
void nsWindow::UpdateGlass() {
void nsWindow::UpdateGlass()
{
#if MOZ_WINSDK_TARGETVER >= MOZ_NTDDI_LONGHORN
HWND hWnd = GetTopLevelHWND(mWnd, PR_TRUE);
// DWMNCRP_USEWINDOWSTYLE - The non-client rendering area is
// rendered based on the window style.
// DWMNCRP_ENABLED - The non-client area rendering is
// enabled; the window style is ignored.
DWMNCRENDERINGPOLICY policy = DWMNCRP_USEWINDOWSTYLE;
if(eTransparencyGlass == mTransparencyMode) {
if (mTransparencyMode == eTransparencyGlass) {
policy = DWMNCRP_ENABLED;
}
// Extends the window frame behind the client area
if(nsUXThemeData::CheckForCompositor()) {
nsUXThemeData::dwmExtendFrameIntoClientAreaPtr(hWnd, &mGlassMargins);
nsUXThemeData::dwmSetWindowAttributePtr(hWnd, DWMWA_NCRENDERING_POLICY, &policy, sizeof policy);
@ -2198,11 +2377,13 @@ NS_IMETHODIMP nsWindow::HideWindowChrome(PRBool aShouldHide)
}
DWORD_PTR style, exStyle;
mHideChrome = aShouldHide;
if (aShouldHide) {
DWORD_PTR tempStyle = ::GetWindowLongPtrW(hwnd, GWL_STYLE);
DWORD_PTR tempExStyle = ::GetWindowLongPtrW(hwnd, GWL_EXSTYLE);
style = tempStyle & ~(WS_CAPTION | WS_THICKFRAME);
style = tempStyle & ~(WS_CAPTION | WS_THICKFRAME | WS_SYSMENU |
WS_MINIMIZEBOX | WS_MAXIMIZEBOX);
exStyle = tempExStyle & ~(WS_EX_DLGMODALFRAME | WS_EX_WINDOWEDGE |
WS_EX_CLIENTEDGE | WS_EX_STATICEDGE);
@ -2210,10 +2391,17 @@ NS_IMETHODIMP nsWindow::HideWindowChrome(PRBool aShouldHide)
mOldExStyle = tempExStyle;
}
else {
if (!mOldStyle || !mOldExStyle) {
if (!mOldStyle)
mOldStyle = ::GetWindowLongPtrW(hwnd, GWL_STYLE);
if (!mOldExStyle)
mOldExStyle = ::GetWindowLongPtrW(hwnd, GWL_EXSTYLE);
}
if (mIsVisible)
mOldStyle |= WS_VISIBLE;
if (mSizeMode == nsSizeMode_Maximized)
mOldStyle |= WS_MAXIMIZE;
else if (mSizeMode == nsSizeMode_Minimized)
mOldStyle |= WS_MINIMIZE;
style = mOldStyle;
exStyle = mOldExStyle;
@ -4186,6 +4374,16 @@ PRBool nsWindow::ProcessMessage(UINT msg, WPARAM &wParam, LPARAM &lParam,
static PRBool getWheelInfo = PR_TRUE;
// Glass hit testing w/custom transparent margins
LRESULT dwmHitResult;
if (mCustomNonClient &&
mCompositorFlag &&
nsUXThemeData::CheckForCompositor() &&
nsUXThemeData::dwmDwmDefWindowProcPtr(mWnd, msg, wParam, lParam, &dwmHitResult)) {
*aRetValue = dwmHitResult;
return PR_TRUE;
}
switch (msg) {
#ifndef WINCE
// WM_QUERYENDSESSION must be handled by all windows.
@ -4270,6 +4468,9 @@ PRBool nsWindow::ProcessMessage(UINT msg, WPARAM &wParam, LPARAM &lParam,
case WM_XP_THEMECHANGED:
{
// Update non-client margin offsets
UpdateNonClientMargins();
DispatchStandardEvent(NS_THEMECHANGED);
// Invalidate the window so that the repaint will
@ -4309,6 +4510,62 @@ PRBool nsWindow::ProcessMessage(UINT msg, WPARAM &wParam, LPARAM &lParam,
}
break;
case WM_NCCALCSIZE:
{
// If wParam is TRUE, it specifies that the application should indicate
// which part of the client area contains valid information. The system
// copies the valid information to the specified area within the new
// client area. If the wParam parameter is FALSE, the application should
// return zero.
if (mCustomNonClient && mCompositorFlag) {
if (!wParam) {
result = PR_TRUE;
*aRetValue = 0;
break;
}
// before:
// rgrc[0]: the proposed window
// rgrc[1]: the current window
// rgrc[2]: the source client area
// pncsp->lppos: move/size data
// after:
// rgrc[0]: the new client area
// rgrc[1]: the destination window
// rgrc[2]: the source client area
// (all values in screen coordiantes)
NCCALCSIZE_PARAMS *pncsp = reinterpret_cast<NCCALCSIZE_PARAMS*>(lParam);
LRESULT res = CallWindowProcW(GetPrevWindowProc(), mWnd, msg, wParam, lParam);
pncsp->rgrc[0].top -= mNonClientOffset.top;
pncsp->rgrc[0].left -= mNonClientOffset.left;
pncsp->rgrc[0].right += mNonClientOffset.right;
pncsp->rgrc[0].bottom += mNonClientOffset.bottom;
result = PR_TRUE;
*aRetValue = res;
}
break;
}
case WM_NCHITTEST:
{
/*
* If an nc client area margin has been moved, we are responsible
* for calculating where the resize margins are and returning the
* appropriate set of hit test constants. DwmDefWindowProc (above)
* will handle hit testing on it's command buttons if we are on a
* composited desktop.
*/
if (!mCustomNonClient || !mCompositorFlag)
break;
*aRetValue =
ClientMarginHitTestPoint(GET_X_LPARAM(lParam), GET_Y_LPARAM(lParam));
result = PR_TRUE;
break;
}
#ifndef WINCE
case WM_POWERBROADCAST:
// only hidden window handle this
@ -4813,6 +5070,7 @@ PRBool nsWindow::ProcessMessage(UINT msg, WPARAM &wParam, LPARAM &lParam,
#ifndef WINCE
#if MOZ_WINSDK_TARGETVER >= MOZ_NTDDI_LONGHORN
case WM_DWMCOMPOSITIONCHANGED:
UpdateNonClientMargins();
BroadcastMsg(mWnd, WM_DWMCOMPOSITIONCHANGED);
DispatchStandardEvent(NS_THEMECHANGED);
UpdateGlass();
@ -5094,6 +5352,71 @@ void nsWindow::GlobalMsgWindowProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lP
*
**************************************************************/
PRInt32
nsWindow::ClientMarginHitTestPoint(PRInt32 mx, PRInt32 my)
{
// Calculations are done in screen coords
RECT winRect;
GetWindowRect(mWnd, &winRect);
// hit return constants:
// HTBORDER - non-resizable border
// HTBOTTOM, HTLEFT, HTRIGHT, HTTOP - resizable border
// HTBOTTOMLEFT, HTBOTTOMRIGHT - resizable corner
// HTTOPLEFT, HTTOPRIGHT - resizable corner
// HTCAPTION - general title bar area
// HTCLIENT - area considered the client
// HTCLOSE - hovering over the close button
// HTMAXBUTTON - maximize button
// HTMINBUTTON - minimize button
PRInt32 testResult = HTCLIENT;
PRBool top = PR_FALSE;
PRBool bottom = PR_FALSE;
PRBool left = PR_FALSE;
PRBool right = PR_FALSE;
if (my >= winRect.top && my <=
(winRect.top + (mCaptionHeight - mNonClientOffset.top)))
top = PR_TRUE;
else if (my <= winRect.bottom && my >= (winRect.bottom - mResizeMargin))
bottom = PR_TRUE;
if (mx >= winRect.left && mx <= (winRect.left + mResizeMargin))
left = PR_TRUE;
else if (mx <= winRect.right && mx >= (winRect.right - mResizeMargin))
right = PR_TRUE;
if (top) {
testResult = HTTOP;
if (left)
testResult = HTTOPLEFT;
else if (right)
testResult = HTTOPRIGHT;
} else if (bottom) {
testResult = HTBOTTOM;
if (left)
testResult = HTBOTTOMLEFT;
else if (right)
testResult = HTBOTTOMRIGHT;
} else {
if (left)
testResult = HTLEFT;
if (right)
testResult = HTRIGHT;
}
if (testResult == HTCLIENT &&
my > (winRect.top + mResizeMargin) &&
my <= (winRect.top + mCaptionHeight) &&
my <= (winRect.top + (mCaptionHeight - mNonClientOffset.top)))
testResult = HTCAPTION;
return testResult;
}
#ifndef WINCE
void nsWindow::PostSleepWakeNotification(const char* aNotification)
{
@ -7027,34 +7350,21 @@ void nsWindow::SetWindowTranslucencyInner(nsTransparencyMode aMode)
return;
}
LONG_PTR style = 0, exStyle = 0;
switch(aMode) {
case eTransparencyTransparent:
{
LONG_PTR exStyle = topWindow->WindowStyle();
exStyle |= WS_EX_LAYERED;
::SetWindowLongPtrW(hWnd, GWL_EXSTYLE, exStyle);
}
case eTransparencyOpaque:
case eTransparencyGlass:
topWindow->mTransparencyMode = aMode;
break;
}
style |= topWindow->WindowStyle();
exStyle |= topWindow->WindowExStyle();
if (aMode == eTransparencyTransparent) {
style &= ~(WS_CAPTION | WS_THICKFRAME | WS_SYSMENU | WS_MINIMIZEBOX | WS_MAXIMIZEBOX);
exStyle &= ~(WS_EX_DLGMODALFRAME | WS_EX_WINDOWEDGE | WS_EX_CLIENTEDGE | WS_EX_STATICEDGE);
}
if (topWindow->mIsVisible)
style |= WS_VISIBLE;
if (topWindow->mSizeMode == nsSizeMode_Maximized)
style |= WS_MAXIMIZE;
else if (topWindow->mSizeMode == nsSizeMode_Minimized)
style |= WS_MINIMIZE;
VERIFY_WINDOW_STYLE(style);
::SetWindowLongPtrW(hWnd, GWL_STYLE, style);
::SetWindowLongPtrW(hWnd, GWL_EXSTYLE, exStyle);
// Hide chrome supports caching old styles, so this can be flipped back and forth
topWindow->HideWindowChrome(aMode == eTransparencyTransparent);
#if MOZ_WINSDK_TARGETVER >= MOZ_NTDDI_LONGHORN
if (mTransparencyMode == eTransparencyGlass)

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@ -197,6 +197,9 @@ public:
NS_IMETHOD OnIMETextChange(PRUint32 aStart, PRUint32 aOldEnd, PRUint32 aNewEnd);
NS_IMETHOD OnIMESelectionChange(void);
#endif // NS_ENABLE_TSF
NS_IMETHOD GetNonClientMargins(nsIntMargin &margins);
NS_IMETHOD SetNonClientMargins(nsIntMargin &margins);
void SetDrawsInTitlebar(PRBool aState);
/**
* Statics used in other classes
@ -284,6 +287,7 @@ protected:
nsWindow* GetParentWindow(PRBool aIncludeOwner);
virtual void SubclassWindow(BOOL bState);
PRBool CanTakeFocus();
PRBool UpdateNonClientMargins();
#if !defined(WINCE)
static void InitTrackPointHack();
#endif
@ -319,6 +323,7 @@ protected:
PRBool& aResult,
LRESULT* aRetValue,
PRBool& aQuitProcessing);
PRInt32 ClientMarginHitTestPoint(PRInt32 mx, PRInt32 my);
/**
* Event handlers
@ -449,6 +454,7 @@ protected:
HKL mLastKeyboardLayout;
nsPopupType mPopupType;
PRPackedBool mDisplayPanFeedback;
PRPackedBool mHideChrome;
WindowHook mWindowHook;
static PRUint32 sInstanceCount;
static TriStateBool sCanQuit;
@ -467,6 +473,20 @@ protected:
static PRUint32 sOOPPPluginFocusEvent;
#endif
// Non-client margin settings
// Pre-calculated outward offset applied to default frames
nsIntMargin mNonClientOffset;
// Margins set by the owner
nsIntMargin mNonClientMargins;
// Indicates custom frames are enabled
PRPackedBool mCustomNonClient;
// Disable non client margins on non-comsitor desktops
PRPackedBool mCompositorFlag;
// Cached copy of L&F's resize border
PRInt32 mResizeMargin;
// Height of the caption plus border
PRInt32 mCaptionHeight;
nsCOMPtr<nsIdleService> mIdleService;
// Hook Data Memebers for Dropdowns. sProcessHook Tells the