void
TaskbarPreview::DrawBitmap(PRUint32 width, PRUint32 height, PRBool isPreview) {
nsresult rv;
nsRefPtr<gfxWindowsSurface> surface = new gfxWindowsSurface(gfxIntSize(width, height), gfxASurface::ImageFormatARGB32);
nsCOMPtr<nsIDocShell> shell = do_QueryReferent(mDocShell);
if (!shell)
return;
rv = GetRenderingContext(shell, surface, width, height);
if (NS_FAILED(rv))
return;
PRBool drawFrame = PR_FALSE;
if (isPreview)
rv = mController->DrawPreview(gCtx, &drawFrame);
else
rv = mController->DrawThumbnail(gCtx, width, height, &drawFrame);
if (NS_FAILED(rv))
return;
HDC hDC = surface->GetDC();
HBITMAP hBitmap = (HBITMAP)GetCurrentObject(hDC, OBJ_BITMAP);
DWORD flags = drawFrame ? DWM_SIT_DISPLAYFRAME : 0;
POINT pptClient = { 0, 0 };
if (isPreview)
nsUXThemeData::dwmSetIconicLivePreviewBitmapPtr(PreviewWindow(), hBitmap, &pptClient, flags);
else
nsUXThemeData::dwmSetIconicThumbnailPtr(PreviewWindow(), hBitmap, flags);
ResetRenderingContext();
}
nsresult
TaskbarPreview::UpdateTooltip() {
NS_ASSERTION(CanMakeTaskbarCalls() && mVisible, "UpdateTooltip called on invisible tab preview");
if (FAILED(mTaskbar->SetThumbnailTooltip(PreviewWindow(), mTooltip.get())))
return NS_ERROR_FAILURE;
return NS_OK;
}
NS_IMETHODIMP
TaskbarPreview::Invalidate() {
if (!mVisible)
return NS_ERROR_FAILURE;
// DWM Composition is required for previews
if (!nsUXThemeData::CheckForCompositor())
return NS_OK;
HWND previewWindow = PreviewWindow();
return FAILED(nsUXThemeData::dwmInvalidateIconicBitmapsPtr(previewWindow))
? NS_ERROR_FAILURE
: NS_OK;
}
LRESULT
TaskbarPreview::WndProc(UINT nMsg, WPARAM wParam, LPARAM lParam) {
switch (nMsg) {
case WM_DWMSENDICONICTHUMBNAIL:
{
uint32_t width = HIWORD(lParam);
uint32_t height = LOWORD(lParam);
float aspectRatio = width/float(height);
nsresult rv;
float preferredAspectRatio;
rv = mController->GetThumbnailAspectRatio(&preferredAspectRatio);
if (NS_FAILED(rv))
break;
uint32_t thumbnailWidth = width;
uint32_t thumbnailHeight = height;
if (aspectRatio > preferredAspectRatio) {
thumbnailWidth = uint32_t(thumbnailHeight * preferredAspectRatio);
} else {
thumbnailHeight = uint32_t(thumbnailWidth / preferredAspectRatio);
}
DrawBitmap(thumbnailWidth, thumbnailHeight, false);
}
break;
case WM_DWMSENDICONICLIVEPREVIEWBITMAP:
{
uint32_t width, height;
nsresult rv;
rv = mController->GetWidth(&width);
if (NS_FAILED(rv))
break;
rv = mController->GetHeight(&height);
if (NS_FAILED(rv))
break;
double scale = nsIWidget::DefaultScaleOverride();
if (scale <= 0.0)
scale = gfxWindowsPlatform::GetPlatform()->GetDPIScale();
DrawBitmap(NSToIntRound(scale * width), NSToIntRound(scale * height), true);
}
break;
}
return ::DefWindowProcW(PreviewWindow(), nMsg, wParam, lParam);
}
LRESULT
TaskbarPreview::WndProc(UINT nMsg, WPARAM wParam, LPARAM lParam) {
switch (nMsg) {
case WM_DWMSENDICONICTHUMBNAIL:
{
PRUint32 width = HIWORD(lParam);
PRUint32 height = LOWORD(lParam);
float aspectRatio = width/float(height);
nsresult rv;
float preferredAspectRatio;
rv = mController->GetThumbnailAspectRatio(&preferredAspectRatio);
if (NS_FAILED(rv))
break;
PRUint32 thumbnailWidth = width;
PRUint32 thumbnailHeight = height;
if (aspectRatio > preferredAspectRatio) {
thumbnailWidth = PRUint32(thumbnailHeight * preferredAspectRatio);
} else {
thumbnailHeight = PRUint32(thumbnailWidth / preferredAspectRatio);
}
DrawBitmap(thumbnailWidth, thumbnailHeight, PR_FALSE);
}
break;
case WM_DWMSENDICONICLIVEPREVIEWBITMAP:
{
PRUint32 width, height;
nsresult rv;
rv = mController->GetWidth(&width);
if (NS_FAILED(rv))
break;
rv = mController->GetHeight(&height);
if (NS_FAILED(rv))
break;
DrawBitmap(width, height, PR_TRUE);
}
break;
}
return ::DefWindowProcW(PreviewWindow(), nMsg, wParam, lParam);
}