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gecko-dev/layout/base/nsDocumentViewer.cpp

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* The contents of this file are subject to the Netscape Public License
* Version 1.0 (the "License"); you may not use this file except in
* compliance with the License. You may obtain a copy of the License at
* http://www.mozilla.org/NPL/
*
* Software distributed under the License is distributed on an "AS IS"
* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
* the License for the specific language governing rights and limitations
* under the License.
*
* The Original Code is Mozilla Communicator client code.
*
* The Initial Developer of the Original Code is Netscape Communications
* Corporation. Portions created by Netscape are Copyright (C) 1998
* Netscape Communications Corporation. All Rights Reserved.
*/
#include "nslayout.h"
#include "nsCOMPtr.h"
#include "nsCRT.h"
#include "nsString.h"
#include "nsISupports.h"
#include "nsIContentViewerContainer.h"
#include "nsIDocumentViewer.h"
#include "nsIImageGroup.h"
#include "nsIImageObserver.h"
#include "nsIDocument.h"
#include "nsIPresContext.h"
#include "nsIPresShell.h"
#include "nsIStyleSet.h"
#include "nsIStyleSheet.h"
#include "nsIFrame.h"
#include "nsIScriptContextOwner.h"
#include "nsIScriptGlobalObject.h"
#include "nsILinkHandler.h"
#include "nsIDOMDocument.h"
#include "nsViewsCID.h"
#include "nsWidgetsCID.h"
#include "nsGfxCIID.h"
#include "nsIDeviceContext.h"
#include "nsIDeviceContextSpec.h"
#include "nsIDeviceContextSpecFactory.h"
#include "nsIViewManager.h"
#include "nsIView.h"
#include "nsIPref.h"
#include "nsIPageSequenceFrame.h"
#include "nsIURL.h"
#include "nsIWebShell.h"
#include "nsIServiceManager.h"
#include "nsIEventQueueService.h"
#include "nsIEventQueue.h"
static NS_DEFINE_CID(kEventQueueService, NS_EVENTQUEUESERVICE_CID);
static NS_DEFINE_IID(kIWebShellIID, NS_IWEB_SHELL_IID);
#ifdef NS_DEBUG
#undef NOISY_VIEWER
#else
#undef NOISY_VIEWER
#endif
class DocumentViewerImpl : public nsIDocumentViewer,
public nsIImageGroupObserver
{
public:
DocumentViewerImpl();
DocumentViewerImpl(nsIPresContext* aPresContext);
NS_DECL_AND_IMPL_ZEROING_OPERATOR_NEW
// nsISupports interface...
NS_DECL_ISUPPORTS
// nsIContentViewer interface...
NS_IMETHOD Init(nsNativeWidget aParent,
nsIDeviceContext* aDeviceContext,
nsIPref* aPrefs,
const nsRect& aBounds,
nsScrollPreference aScrolling = nsScrollPreference_kAuto);
NS_IMETHOD BindToDocument(nsISupports* aDoc, const char* aCommand);
NS_IMETHOD SetContainer(nsIContentViewerContainer* aContainer);
NS_IMETHOD GetContainer(nsIContentViewerContainer*& aContainerResult);
NS_IMETHOD Stop(void);
NS_IMETHOD GetBounds(nsRect& aResult);
NS_IMETHOD SetBounds(const nsRect& aBounds);
NS_IMETHOD Move(PRInt32 aX, PRInt32 aY);
NS_IMETHOD Show();
NS_IMETHOD Hide();
NS_IMETHOD Print(void);
NS_IMETHOD PrintContent(nsIWebShell *aParent,nsIDeviceContext *aDContext);
NS_IMETHOD SetEnableRendering(PRBool aOn);
NS_IMETHOD GetEnableRendering(PRBool* aResult);
// nsIDocumentViewer interface...
NS_IMETHOD SetUAStyleSheet(nsIStyleSheet* aUAStyleSheet);
NS_IMETHOD GetDocument(nsIDocument*& aResult);
NS_IMETHOD GetPresShell(nsIPresShell*& aResult);
NS_IMETHOD GetPresContext(nsIPresContext*& aResult);
NS_IMETHOD CreateDocumentViewerUsing(nsIPresContext* aPresContext,
nsIDocumentViewer*& aResult);
// nsIImageGroupObserver interface...
virtual void Notify(nsIImageGroup *aImageGroup,
nsImageGroupNotification aNotificationType);
protected:
virtual ~DocumentViewerImpl();
private:
void ForceRefresh(void);
nsresult CreateStyleSet(nsIDocument* aDocument, nsIStyleSet** aStyleSet);
nsresult MakeWindow(nsNativeWidget aNativeParent,
const nsRect& aBounds,
nsScrollPreference aScrolling);
//
// The following three methods are used for printing...
//
void DocumentReadyForPrinting();
static void PR_CALLBACK HandlePLEvent(PLEvent* aEvent);
static void PR_CALLBACK DestroyPLEvent(PLEvent* aEvent);
protected:
// IMPORTANT: The ownership implicit in the following member
// variables has been explicitly checked and set using nsCOMPtr
// for owning pointers and raw COM interface pointers for weak
// (ie, non owning) references. If you add any members to this
// class, please make the ownership explicit (pinkerton, scc).
nsIContentViewerContainer* mContainer; // [WEAK] it owns me!
nsCOMPtr<nsIDeviceContext> mDeviceContext; // ??? can't hurt, but...
nsIView* mView; // [WEAK] cleaned up by view mgr
// the following six items are explicitly in this order
// so they will be destroyed in the reverse order (pinkerton, scc)
nsCOMPtr<nsIDocument> mDocument;
nsCOMPtr<nsIWidget> mWindow; // ??? should we really own it?
nsCOMPtr<nsIViewManager> mViewManager;
nsCOMPtr<nsIPresContext> mPresContext;
nsCOMPtr<nsIPresShell> mPresShell;
nsCOMPtr<nsIStyleSheet> mUAStyleSheet;
PRBool mEnableRendering;
PRInt16 mNumURLStarts;
PRBool mIsPrinting;
// printing members
nsIDeviceContext *mPrintDC;
nsIPresContext *mPrintPC;
nsIStyleSet *mPrintSS;
nsIPresShell *mPrintPS;
nsIViewManager *mPrintVM;
nsIView *mPrintView;
};
// Class IDs
static NS_DEFINE_CID(kViewManagerCID, NS_VIEW_MANAGER_CID);
static NS_DEFINE_CID(kScrollingViewCID, NS_SCROLLING_VIEW_CID);
static NS_DEFINE_CID(kWidgetCID, NS_CHILD_CID);
static NS_DEFINE_CID(kViewCID, NS_VIEW_CID);
// Interface IDs
static NS_DEFINE_IID(kIScriptContextOwnerIID, NS_ISCRIPTCONTEXTOWNER_IID);
static NS_DEFINE_IID(kISupportsIID, NS_ISUPPORTS_IID);
static NS_DEFINE_IID(kIDocumentIID, NS_IDOCUMENT_IID);
static NS_DEFINE_IID(kIDOMDocumentIID, NS_IDOMDOCUMENT_IID);
static NS_DEFINE_IID(kIViewManagerIID, NS_IVIEWMANAGER_IID);
static NS_DEFINE_IID(kIViewIID, NS_IVIEW_IID);
static NS_DEFINE_IID(kScrollViewIID, NS_ISCROLLABLEVIEW_IID);
static NS_DEFINE_IID(kIContentViewerIID, NS_ICONTENT_VIEWER_IID);
static NS_DEFINE_IID(kIDocumentViewerIID, NS_IDOCUMENT_VIEWER_IID);
static NS_DEFINE_IID(kILinkHandlerIID, NS_ILINKHANDLER_IID);
nsresult
NS_NewDocumentViewer(nsIDocumentViewer** aResult)
{
NS_PRECONDITION(aResult, "null OUT ptr");
if (!aResult) {
return NS_ERROR_NULL_POINTER;
}
DocumentViewerImpl* it = new DocumentViewerImpl();
if (nsnull == it) {
*aResult = nsnull;
return NS_ERROR_OUT_OF_MEMORY;
}
return it->QueryInterface(kIDocumentViewerIID, (void**) aResult);
}
// Note: operator new zeros our memory
DocumentViewerImpl::DocumentViewerImpl()
{
NS_INIT_REFCNT();
mEnableRendering = PR_TRUE;
}
DocumentViewerImpl::DocumentViewerImpl(nsIPresContext* aPresContext)
: mPresContext(dont_QueryInterface(aPresContext))
{
NS_INIT_REFCNT();
}
// ISupports implementation...
NS_IMPL_ADDREF(DocumentViewerImpl)
NS_IMPL_RELEASE(DocumentViewerImpl)
nsresult
DocumentViewerImpl::QueryInterface(REFNSIID aIID, void** aInstancePtr)
{
if (NULL == aInstancePtr) {
return NS_ERROR_NULL_POINTER;
}
if (aIID.Equals(kIContentViewerIID)) {
nsIContentViewer* tmp = this;
*aInstancePtr = (void*)tmp;
NS_ADDREF_THIS();
return NS_OK;
}
if (aIID.Equals(kIDocumentViewerIID)) {
nsIDocumentViewer* tmp = this;
*aInstancePtr = (void*) tmp;
NS_ADDREF_THIS();
return NS_OK;
}
if (aIID.Equals(kISupportsIID)) {
nsIContentViewer* tmp1 = this;
nsISupports* tmp2 = tmp1;
*aInstancePtr = (void*) tmp2;
NS_ADDREF_THIS();
return NS_OK;
}
return NS_NOINTERFACE;
}
DocumentViewerImpl::~DocumentViewerImpl()
{
if (mDocument) {
// Break global object circular reference on the document created
// in the DocViewer Init
nsIScriptContextOwner *mOwner = mDocument->GetScriptContextOwner();
if (nsnull != mOwner) {
nsIScriptGlobalObject *mGlobal;
mOwner->GetScriptGlobalObject(&mGlobal);
if (nsnull != mGlobal) {
mGlobal->SetNewDocument(nsnull);
NS_RELEASE(mGlobal);
}
NS_RELEASE(mOwner);
// out of band cleanup of webshell
mDocument->SetScriptContextOwner(nsnull);
}
}
if (mDeviceContext)
mDeviceContext->FlushFontCache();
if (mPresShell) {
// Break circular reference (or something)
mPresShell->EndObservingDocument();
}
}
/*
* This method is called by the Document Loader once a document has
* been created for a particular data stream... The content viewer
* must cache this document for later use when Init(...) is called.
*/
NS_IMETHODIMP
DocumentViewerImpl::BindToDocument(nsISupports *aDoc, const char *aCommand)
{
NS_PRECONDITION(!mDocument, "Viewer is already bound to a document!");
#ifdef NOISY_VIEWER
printf("DocumentViewerImpl::BindToDocument\n");
#endif
nsresult rv;
mDocument = do_QueryInterface(aDoc,&rv);
return rv;
}
NS_IMETHODIMP
DocumentViewerImpl::SetContainer(nsIContentViewerContainer* aContainer)
{
mContainer = aContainer;
if (mPresContext) {
mPresContext->SetContainer(aContainer);
}
return NS_OK;
}
NS_IMETHODIMP
DocumentViewerImpl::GetContainer(nsIContentViewerContainer*& aResult)
{
aResult = mContainer;
NS_IF_ADDREF(aResult);
return NS_OK;
}
NS_IMETHODIMP
DocumentViewerImpl::Init(nsNativeWidget aNativeParent,
nsIDeviceContext* aDeviceContext,
nsIPref* aPrefs,
const nsRect& aBounds,
nsScrollPreference aScrolling)
{
nsresult rv;
if (!mDocument) {
return NS_ERROR_NULL_POINTER;
}
mDeviceContext = dont_QueryInterface(aDeviceContext);
PRBool makeCX = PR_FALSE;
if (!mPresContext) {
// Create presentation context
rv = NS_NewGalleyContext(getter_AddRefs(mPresContext));
if (NS_OK != rv) {
return rv;
}
mPresContext->Init(aDeviceContext, aPrefs);
makeCX = PR_TRUE;
}
if (nsnull != mContainer) {
nsILinkHandler* linkHandler = nsnull;
mContainer->QueryCapability(kILinkHandlerIID, (void**)&linkHandler);
mPresContext->SetContainer(mContainer);
mPresContext->SetLinkHandler(linkHandler);
NS_IF_RELEASE(linkHandler);
// Set script-context-owner in the document
nsIScriptContextOwner* owner = nsnull;
mContainer->QueryCapability(kIScriptContextOwnerIID, (void**)&owner);
if (nsnull != owner) {
mDocument->SetScriptContextOwner(owner);
nsIScriptGlobalObject* global;
rv = owner->GetScriptGlobalObject(&global);
if (NS_SUCCEEDED(rv) && (nsnull != global)) {
nsIDOMDocument *domdoc = nsnull;
mDocument->QueryInterface(kIDOMDocumentIID,
(void**) &domdoc);
if (nsnull != domdoc) {
global->SetNewDocument(domdoc);
NS_RELEASE(domdoc);
}
NS_RELEASE(global);
}
NS_RELEASE(owner);
}
}
// Create the ViewManager and Root View...
MakeWindow(aNativeParent, aBounds, aScrolling);
// Create the style set...
nsIStyleSet* styleSet;
rv = CreateStyleSet(mDocument, &styleSet);
if (NS_OK == rv) {
// Now make the shell for the document
rv = mDocument->CreateShell(mPresContext, mViewManager, styleSet,
getter_AddRefs(mPresShell));
NS_RELEASE(styleSet);
if (NS_OK == rv) {
// Initialize our view manager
nsRect bounds;
mWindow->GetBounds(bounds);
nscoord width = bounds.width;
nscoord height = bounds.height;
float p2t;
mPresContext->GetPixelsToTwips(&p2t);
width = NSIntPixelsToTwips(width, p2t);
height = NSIntPixelsToTwips(height, p2t);
mViewManager->DisableRefresh();
mViewManager->SetWindowDimensions(width, height);
if (!makeCX) {
// Make shell an observer for next time
mPresShell->BeginObservingDocument();
//XXX I don't think this should be done *here*; and why paint nothing
//(which turns out to cause black flashes!)???
// Resize-reflow this time
mPresShell->InitialReflow(width, height);
// Now trigger a refresh
if (mEnableRendering) {
mViewManager->EnableRefresh();
}
}
}
}
return rv;
}
NS_IMETHODIMP
DocumentViewerImpl::Stop(void)
{
if (mPresContext) {
mPresContext->Stop();
}
return NS_OK;
}
NS_IMETHODIMP
DocumentViewerImpl::SetUAStyleSheet(nsIStyleSheet* aUAStyleSheet)
{
mUAStyleSheet = dont_QueryInterface(aUAStyleSheet);
return NS_OK;
}
NS_IMETHODIMP
DocumentViewerImpl::GetDocument(nsIDocument*& aResult)
{
aResult = mDocument;
NS_IF_ADDREF(aResult);
return NS_OK;
}
NS_IMETHODIMP
DocumentViewerImpl::GetPresShell(nsIPresShell*& aResult)
{
aResult = mPresShell;
NS_IF_ADDREF(aResult);
return NS_OK;
}
NS_IMETHODIMP
DocumentViewerImpl::GetPresContext(nsIPresContext*& aResult)
{
aResult = mPresContext;
NS_IF_ADDREF(aResult);
return NS_OK;
}
NS_IMETHODIMP
DocumentViewerImpl::GetBounds(nsRect& aResult)
{
NS_PRECONDITION(mWindow, "null window");
if (mWindow) {
mWindow->GetBounds(aResult);
}
else {
aResult.SetRect(0, 0, 0, 0);
}
return NS_OK;
}
NS_IMETHODIMP
DocumentViewerImpl::SetBounds(const nsRect& aBounds)
{
NS_PRECONDITION(mWindow, "null window");
if (mWindow) {
// Don't have the widget repaint. Layout will generate repaint requests
// during reflow
mWindow->Resize(aBounds.x, aBounds.y, aBounds.width, aBounds.height,
PR_FALSE);
}
return NS_OK;
}
NS_IMETHODIMP
DocumentViewerImpl::Move(PRInt32 aX, PRInt32 aY)
{
NS_PRECONDITION(mWindow, "null window");
if (mWindow) {
mWindow->Move(aX, aY);
}
return NS_OK;
}
NS_IMETHODIMP
DocumentViewerImpl::Show(void)
{
NS_PRECONDITION(mWindow, "null window");
if (mWindow) {
mWindow->Show(PR_TRUE);
}
return NS_OK;
}
NS_IMETHODIMP
DocumentViewerImpl::Hide(void)
{
NS_PRECONDITION(mWindow, "null window");
if (mWindow) {
mWindow->Show(PR_FALSE);
}
return NS_OK;
}
static NS_DEFINE_IID(kIDeviceContextSpecFactoryIID, NS_IDEVICE_CONTEXT_SPEC_FACTORY_IID);
static NS_DEFINE_IID(kDeviceContextSpecFactoryCID, NS_DEVICE_CONTEXT_SPEC_FACTORY_CID);
/** ---------------------------------------------------
* See documentation above in the DocumentViewerImpl class definition
* @update 07/09/99 dwc
*/
NS_IMETHODIMP
DocumentViewerImpl::Print(void)
{
nsCOMPtr<nsIContentViewerContainer> containerResult;
nsCOMPtr<nsIWebShell> webContainer;
nsCOMPtr<nsIDeviceContextSpecFactory> factory;
PRInt32 width,height;
nsCOMPtr<nsIPref> prefs;
nsComponentManager::CreateInstance(kDeviceContextSpecFactoryCID,
nsnull,
kIDeviceContextSpecFactoryIID,
(void **)getter_AddRefs(factory));
if (factory) {
#ifdef DEBUG_dcone
printf("PRINT JOB STARTING\n");
#endif
nsIDeviceContextSpec *devspec = nsnull;
nsCOMPtr<nsIDeviceContext> dx;
mPrintDC = nsnull;
factory->CreateDeviceContextSpec(nsnull, devspec, PR_FALSE);
if (nsnull != devspec) {
mPresContext->GetDeviceContext(getter_AddRefs(dx));
nsresult rv = dx->GetDeviceContextFor(devspec, mPrintDC);
if (NS_SUCCEEDED(rv)) {
NS_RELEASE(devspec);
// Get the webshell for this documentviewer
rv = this->GetContainer(*getter_AddRefs(containerResult));
webContainer = do_QueryInterface(containerResult);
if(webContainer) {
// load the document and do the initial reflow on the entire document
rv = NS_NewPrintContext(&mPrintPC);
if(NS_FAILED(rv)){
return rv;
}
mPrintDC->GetDeviceSurfaceDimensions(width,height);
mPresContext->GetPrefs(getter_AddRefs(prefs));
mPrintPC->Init(mPrintDC,prefs);
CreateStyleSet(mDocument,&mPrintSS);
rv = NS_NewPresShell(&mPrintPS);
if(NS_FAILED(rv)){
return rv;
}
rv = nsComponentManager::CreateInstance(kViewManagerCID,nsnull,kIViewManagerIID,(void**)&mPrintVM);
if(NS_FAILED(rv)) {
return rv;
}
rv = mPrintVM->Init(mPrintDC);
if(NS_FAILED(rv)) {
return rv;
}
rv = nsComponentManager::CreateInstance(kViewCID,nsnull,kIViewIID,(void**)&mPrintView);
if(NS_FAILED(rv)) {
return rv;
}
nsRect tbounds = nsRect(0,0,width,height);
rv = mPrintView->Init(mPrintVM,tbounds,nsnull);
if(NS_FAILED(rv)) {
return rv;
}
// setup hierarchical relationship in view manager
mPrintVM->SetRootView(mPrintView);
mPrintPS->Init(mDocument,mPrintPC,mPrintVM,mPrintSS);
nsCOMPtr<nsIImageGroup> imageGroup;
mPrintPC->GetImageGroup(getter_AddRefs(imageGroup));
if (imageGroup) {
imageGroup->AddObserver(this);
}
mPrintPS->InitialReflow(width,height);
#ifdef DEBUG_dcone
float a1,a2;
PRInt32 i1,i2;
printf("CRITICAL PRINTING INFORMATION\n");
printf("PRESSHELL(%x) PRESCONTEXT(%x)\nVIEWMANAGER(%x) VIEW(%x)\n",
mPrintPS, mPrintPC,mPrintDC,mPrintVM,mPrintView);
// DEVICE CONTEXT INFORMATION from PresContext
printf("DeviceContext of Presentation Context(%x)\n",dx);
dx->GetDevUnitsToTwips(a1);
dx->GetTwipsToDevUnits(a2);
printf(" DevToTwips = %f TwipToDev = %f\n",a1,a2);
dx->GetAppUnitsToDevUnits(a1);
dx->GetDevUnitsToAppUnits(a2);
printf(" AppUnitsToDev = %f DevUnitsToApp = %f\n",a1,a2);
dx->GetCanonicalPixelScale(a1);
printf(" GetCanonicalPixelScale = %f\n",a1);
dx->GetScrollBarDimensions(a1, a2);
printf(" ScrollBar x = %f y = %f\n",a1,a2);
dx->GetZoom(a1);
printf(" Zoom = %f\n",a1);
dx->GetDepth((PRUint32&)i1);
printf(" Depth = %d\n",i1);
dx->GetDeviceSurfaceDimensions(i1,i2);
printf(" DeviceDimension w = %d h = %d\n",i1,i2);
// DEVICE CONTEXT INFORMATION
printf("DeviceContext created for print(%x)\n",mPrintDC);
mPrintDC->GetDevUnitsToTwips(a1);
mPrintDC->GetTwipsToDevUnits(a2);
printf(" DevToTwips = %f TwipToDev = %f\n",a1,a2);
mPrintDC->GetAppUnitsToDevUnits(a1);
mPrintDC->GetDevUnitsToAppUnits(a2);
printf(" AppUnitsToDev = %f DevUnitsToApp = %f\n",a1,a2);
mPrintDC->GetCanonicalPixelScale(a1);
printf(" GetCanonicalPixelScale = %f\n",a1);
mPrintDC->GetScrollBarDimensions(a1, a2);
printf(" ScrollBar x = %f y = %f\n",a1,a2);
mPrintDC->GetZoom(a1);
printf(" Zoom = %f\n",a1);
mPrintDC->GetDepth((PRUint32&)i1);
printf(" Depth = %d\n",i1);
mPrintDC->GetDeviceSurfaceDimensions(i1,i2);
printf(" DeviceDimension w = %d h = %d\n",i1,i2);
#endif
//
// The mIsPrinting flag is set when the ImageGroup observer is
// notified that images must be loaded as a result of the
// InitialReflow...
//
if(!mIsPrinting){
DocumentReadyForPrinting();
#ifdef DEBUG_dcone
printf("PRINT JOB ENDING, OBSERVER WAS NOT CALLED\n");
#endif
} else {
// use the observer mechanism to finish the printing
#ifdef DEBUG_dcone
printf("PRINTING OBSERVER STARTED\n");
#endif
}
}
}
}
}
return NS_OK;
}
/** ---------------------------------------------------
* See documentation above in the DocumentViewerImpl class definition
* @update 07/09/99 dwc
*/
NS_IMETHODIMP
DocumentViewerImpl::PrintContent(nsIWebShell *aParent,nsIDeviceContext *aDContext)
{
nsCOMPtr<nsIStyleSet> ss;
nsCOMPtr<nsIPref> prefs;
nsCOMPtr<nsIViewManager> vm;
PRInt32 width, height;
nsIView *view;
nsresult rv;
PRInt32 count,i;
nsIWebShell *childWebShell;
nsIContentViewer *viewer;
aParent->GetChildCount(count);
if(count> 0) {
for(i=0;i<count;i++) {
aParent->ChildAt(i,childWebShell);
childWebShell->GetContentViewer(&viewer);
viewer->PrintContent(childWebShell,aDContext);
NS_RELEASE(childWebShell);
NS_RELEASE(viewer);
}
} else {
aDContext->BeginDocument();
aDContext->GetDeviceSurfaceDimensions(width, height);
nsCOMPtr<nsIPresContext> cx;
rv = NS_NewPrintContext(getter_AddRefs(cx));
if (NS_FAILED(rv)) {
return rv;
}
mPresContext->GetPrefs(getter_AddRefs(prefs));
cx->Init(aDContext, prefs);
nsCompatibility mode;
mPresContext->GetCompatibilityMode(&mode);
cx->SetCompatibilityMode(mode);
CreateStyleSet(mDocument, getter_AddRefs(ss));
nsCOMPtr<nsIPresShell> ps;
rv = NS_NewPresShell(getter_AddRefs(ps));
if (NS_FAILED(rv)) {
return rv;
}
rv = nsComponentManager::CreateInstance(kViewManagerCID,
nsnull,
kIViewManagerIID,
(void **)getter_AddRefs(vm));
if (NS_FAILED(rv)) {
return rv;
}
rv = vm->Init(aDContext);
if (NS_FAILED(rv)) {
return rv;
}
nsRect tbounds = nsRect(0, 0, width, height);
// Create a child window of the parent that is our "root view/window"
rv = nsComponentManager::CreateInstance(kViewCID,nsnull,kIViewIID,(void **)&view);
if (NS_FAILED(rv)) {
return rv;
}
rv = view->Init(vm, tbounds, nsnull);
if (NS_FAILED(rv)) {
return rv;
}
// Setup hierarchical relationship in view manager
vm->SetRootView(view);
ps->Init(mDocument, cx, vm, ss);
//lay it out...
//aDContext->BeginDocument();
ps->InitialReflow(width, height);
// Ask the page sequence frame to print all the pages
nsIPageSequenceFrame* pageSequence;
nsPrintOptions options;
ps->GetPageSequenceFrame(&pageSequence);
NS_ASSERTION(nsnull != pageSequence, "no page sequence frame");
pageSequence->Print(*cx, options, nsnull);
aDContext->EndDocument();
ps->EndObservingDocument();
}
return NS_OK;
}
void DocumentViewerImpl::Notify(nsIImageGroup *aImageGroup,
nsImageGroupNotification aNotificationType)
{
//
// Image are being loaded... Set the flag to delay printing until
// all images are loaded.
//
if (aNotificationType == nsImageGroupNotification_kStartedLoading) {
mIsPrinting = PR_TRUE;
}
//
// All the images have been loaded, so the document is ready to print.
//
// However, at this point we are unable to release the resources that
// were allocated for printing... This is because ImgLib resources will
// be deleted and *this* is an ImgLib notification routine. So, fire an
// event to do the actual printing.
//
else if(aNotificationType == nsImageGroupNotification_kFinishedLoading) {
nsresult rv;
nsCOMPtr<nsIEventQueue> eventQ;
// Get the event queue of the current thread...
NS_WITH_SERVICE(nsIEventQueueService, eventQService, kEventQueueService, &rv);
if (NS_FAILED(rv)) return;
rv = eventQService->GetThreadEventQueue(PR_CurrentThread(),
getter_AddRefs(eventQ));
if (NS_FAILED(rv)) return;
PRStatus status;
PLEvent *event = new PLEvent;
if (!event) return;
//
// AddRef this because it is being placed in the PLEvent struct.
// It will be Released when DestroyPLEvent is called...
//
NS_ADDREF_THIS();
PL_InitEvent(event,
this,
(PLHandleEventProc) DocumentViewerImpl::HandlePLEvent,
(PLDestroyEventProc) DocumentViewerImpl::DestroyPLEvent);
status = eventQ->PostEvent(event);
}
}
NS_IMETHODIMP
DocumentViewerImpl::SetEnableRendering(PRBool aOn)
{
mEnableRendering = aOn;
if (mViewManager) {
if (aOn) {
mViewManager->EnableRefresh();
nsIView* view;
mViewManager->GetRootView(view); // views are not refCounted
if (view) {
mViewManager->UpdateView(view,nsnull,NS_VMREFRESH_IMMEDIATE);
}
}
else {
mViewManager->DisableRefresh();
}
}
return NS_OK;
}
NS_IMETHODIMP
DocumentViewerImpl::GetEnableRendering(PRBool* aResult)
{
NS_PRECONDITION(nsnull != aResult, "null OUT ptr");
if (aResult) {
*aResult = mEnableRendering;
}
return NS_OK;
}
void
DocumentViewerImpl::ForceRefresh()
{
mWindow->Invalidate(PR_TRUE);
}
nsresult
DocumentViewerImpl::CreateStyleSet(nsIDocument* aDocument,
nsIStyleSet** aStyleSet)
{
// this should eventually get expanded to allow for creating
// different sets for different media
nsresult rv;
if (!mUAStyleSheet) {
NS_WARNING("unable to load UA style sheet");
}
rv = NS_NewStyleSet(aStyleSet);
if (NS_OK == rv) {
PRInt32 index = aDocument->GetNumberOfStyleSheets();
while (0 < index--) {
nsIStyleSheet* sheet = aDocument->GetStyleSheetAt(index);
(*aStyleSet)->AddDocStyleSheet(sheet, aDocument);
NS_RELEASE(sheet);
}
if (mUAStyleSheet) {
(*aStyleSet)->AppendBackstopStyleSheet(mUAStyleSheet);
}
}
return rv;
}
nsresult
DocumentViewerImpl::MakeWindow(nsNativeWidget aNativeParent,
const nsRect& aBounds,
nsScrollPreference aScrolling)
{
nsresult rv;
rv = nsComponentManager::CreateInstance(kViewManagerCID,
nsnull,
kIViewManagerIID,
getter_AddRefs(mViewManager));
nsCOMPtr<nsIDeviceContext> dx;
mPresContext->GetDeviceContext(getter_AddRefs(dx));
if ((NS_OK != rv) || (NS_OK != mViewManager->Init(dx))) {
return rv;
}
nsRect tbounds = aBounds;
float p2t;
mPresContext->GetPixelsToTwips(&p2t);
tbounds *= p2t;
// Create a child window of the parent that is our "root view/window"
// Create a view
rv = nsComponentManager::CreateInstance(kViewCID,
nsnull,
kIViewIID,
(void**)&mView);
if ((NS_OK != rv) || (NS_OK != mView->Init(mViewManager,
tbounds,
nsnull))) {
return rv;
}
rv = mView->CreateWidget(kWidgetCID, nsnull, aNativeParent);
if (rv != NS_OK)
return rv;
// Setup hierarchical relationship in view manager
mViewManager->SetRootView(mView);
mView->GetWidget(*getter_AddRefs(mWindow));
//set frame rate to 25 fps
mViewManager->SetFrameRate(25);
// This SetFocus is necessary so the Arrow Key and Page Key events
// go to the scrolled view as soon as the Window is created instead of going to
// the browser window (this enables keyboard scrolling of the document)
// mWindow->SetFocus();
return rv;
}
NS_IMETHODIMP
DocumentViewerImpl::CreateDocumentViewerUsing(nsIPresContext* aPresContext,
nsIDocumentViewer*& aResult)
{
if (!mDocument) {
// XXX better error
return NS_ERROR_NULL_POINTER;
}
if (nsnull == aPresContext) {
return NS_ERROR_NULL_POINTER;
}
// Create new viewer
DocumentViewerImpl* viewer = new DocumentViewerImpl(aPresContext);
if (nsnull == viewer) {
return NS_ERROR_OUT_OF_MEMORY;
}
NS_ADDREF(viewer);
// XXX make sure the ua style sheet is used (for now; need to be
// able to specify an alternate)
viewer->SetUAStyleSheet(mUAStyleSheet);
// Bind the new viewer to the old document
nsresult rv = viewer->BindToDocument(mDocument, "create");/* XXX verb? */
aResult = viewer;
return rv;
}
void PR_CALLBACK DocumentViewerImpl::HandlePLEvent(PLEvent* aEvent)
{
DocumentViewerImpl *viewer;
viewer = (DocumentViewerImpl*)PL_GetEventOwner(aEvent);
NS_ASSERTION(viewer, "The event owner is null.");
if (viewer) {
viewer->DocumentReadyForPrinting();
}
}
void PR_CALLBACK DocumentViewerImpl::DestroyPLEvent(PLEvent* aEvent)
{
DocumentViewerImpl *viewer;
viewer = (DocumentViewerImpl*)PL_GetEventOwner(aEvent);
NS_IF_RELEASE(viewer);
delete aEvent;
}
void DocumentViewerImpl::DocumentReadyForPrinting()
{
nsresult rv;
nsCOMPtr<nsIContentViewerContainer> containerResult;
nsCOMPtr<nsIWebShell> webContainer;
rv = this->GetContainer(*getter_AddRefs(containerResult));
webContainer = do_QueryInterface(containerResult);
if(webContainer) {
//
// Remove ourselves as an image group observer...
//
nsCOMPtr<nsIImageGroup> imageGroup;
mPrintPC->GetImageGroup(getter_AddRefs(imageGroup));
if (imageGroup) {
imageGroup->RemoveObserver(this);
}
//
// Send the document to the printer...
//
PrintContent(webContainer,mPrintDC);
// printing is complete, clean up now
mIsPrinting = PR_FALSE;
mPrintPS->EndObservingDocument();
NS_RELEASE(mPrintPS);
NS_RELEASE(mPrintVM);
NS_RELEASE(mPrintSS);
NS_RELEASE(mPrintDC);
}
}
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