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Added CantRenderReplacedElement() to nsIPresShell and changed the image frame 

code to use it
This commit is contained in:
troy%netscape.com 1999-02-05 18:25:29 +00:00
Родитель 7b1c2ddcae
Коммит b8205354d1
6 изменённых файлов: 232 добавлений и 28 удалений
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8
layout/base/nsIPresShell.h
Просмотреть файл

@ -157,6 +157,14 @@ public:
*/
NS_IMETHOD CreateRenderingContext(nsIFrame *aFrame, nsIRenderingContext *&aContext) = 0;
// Notification that we were unable to render a replaced element.
// Called when the replaced element can not be rendered, and we should
// instead render the element's contents.
// The content object associated with aFrame should either be a IMG
// element or an OBJECT element.
NS_IMETHOD CantRenderReplacedElement(nsIPresContext* aPresContext,
nsIFrame* aFrame) = 0;
// XXX events
// XXX selection

98
layout/base/nsPresShell.cpp
Просмотреть файл

@ -49,6 +49,9 @@
#include "nsIDOMElement.h"
#include "nsHTMLAtoms.h"
#include "nsCOMPtr.h"
#include "nsIEventQueueService.h"
#include "nsXPComCIID.h"
#include "nsIServiceManager.h"
static PRBool gsNoisyRefs = PR_FALSE;
#undef NOISY
@ -146,18 +149,23 @@ FrameHashTable::Remove(nsIFrame* aKey)
//----------------------------------------------------------------------
// Class IID's
static NS_DEFINE_IID(kEventQueueServiceCID, NS_EVENTQUEUESERVICE_CID);
static NS_DEFINE_IID(kRangeListCID, NS_RANGELIST_CID);
static NS_DEFINE_IID(kCRangeCID, NS_RANGE_CID);
// IID's
static NS_DEFINE_IID(kISupportsIID, NS_ISUPPORTS_IID);
static NS_DEFINE_IID(kIPresShellIID, NS_IPRESSHELL_IID);
static NS_DEFINE_IID(kIDocumentObserverIID, NS_IDOCUMENT_OBSERVER_IID);
static NS_DEFINE_IID(kIViewObserverIID, NS_IVIEWOBSERVER_IID);
static NS_DEFINE_IID(kRangeListCID, NS_RANGELIST_CID);
static NS_DEFINE_IID(kISelectionIID, NS_ISELECTION_IID);
static NS_DEFINE_IID(kICollectionIID, NS_ICOLLECTION_IID);
static NS_DEFINE_IID(kIDOMNodeIID, NS_IDOMNODE_IID);
static NS_DEFINE_IID(kIDOMRangeIID, NS_IDOMRANGE_IID);
static NS_DEFINE_IID(kCRangeCID, NS_RANGE_CID);
static NS_DEFINE_IID(kIDOMDocumentIID, NS_IDOMDOCUMENT_IID);
static NS_DEFINE_IID(kIFocusTrackerIID, NS_IFOCUSTRACKER_IID);
static NS_DEFINE_IID(kIEventQueueServiceIID, NS_IEVENTQUEUESERVICE_IID);
class PresShell : public nsIPresShell, public nsIViewObserver,
@ -256,6 +264,8 @@ public:
NS_IMETHOD ProcessReflowCommands();
virtual void ClearFrameRefs(nsIFrame*);
NS_IMETHOD CreateRenderingContext(nsIFrame *aFrame, nsIRenderingContext *&aContext);
NS_IMETHOD CantRenderReplacedElement(nsIPresContext* aPresContext,
nsIFrame* aFrame);
//nsIViewObserver interface
@ -272,6 +282,10 @@ public:
NS_IMETHOD SetFocus(nsIFrame *aFrame, nsIFrame *aAnchorFrame);
NS_IMETHOD GetFocus(nsIFrame **aFrame, nsIFrame **aAnchorFrame);
// implementation
void HandleCantRenderReplacedElementEvent(nsIFrame* aFrame);
protected:
~PresShell();
@ -1034,8 +1048,8 @@ PresShell::ClearFrameRefs(nsIFrame* aFrame)
}
}
NS_IMETHODIMP PresShell :: CreateRenderingContext(nsIFrame *aFrame,
nsIRenderingContext *&aContext)
NS_IMETHODIMP
PresShell::CreateRenderingContext(nsIFrame *aFrame, nsIRenderingContext *&aContext)
{
nsIWidget *widget = nsnull;
nsIView *view = nsnull;
@ -1074,6 +1088,82 @@ NS_IMETHODIMP PresShell :: CreateRenderingContext(nsIFrame *aFrame,
return rv;
}
void
PresShell::HandleCantRenderReplacedElementEvent(nsIFrame* aFrame)
{
// Double-check that we haven't deleted the frame hierarchy
// XXX If we stay with this model we approach, then we need to observe
// aFrame and if it's deleted null out the pointer in the PL event struct
if (nsnull != mRootFrame) {
mStyleSet->CantRenderReplacedElement(mPresContext, aFrame);
ProcessReflowCommands();
}
}
struct CantRenderReplacedElementEvent : public PLEvent {
CantRenderReplacedElementEvent(PresShell* aShell, nsIFrame* aFrame);
~CantRenderReplacedElementEvent();
PresShell* mShell;
nsIFrame* mFrame;
};
static void PR_CALLBACK
HandlePLEvent(CantRenderReplacedElementEvent* aEvent)
{
aEvent->mShell->HandleCantRenderReplacedElementEvent(aEvent->mFrame);
}
static void PR_CALLBACK
DestroyPLEvent(CantRenderReplacedElementEvent* aEvent)
{
delete aEvent;
}
CantRenderReplacedElementEvent::CantRenderReplacedElementEvent(PresShell* aShell,
nsIFrame* aFrame)
{
mShell = aShell;
NS_ADDREF(mShell);
mFrame = aFrame;
PL_InitEvent(this, nsnull, (PLHandleEventProc)::HandlePLEvent,
(PLDestroyEventProc)::DestroyPLEvent);
}
CantRenderReplacedElementEvent::~CantRenderReplacedElementEvent()
{
NS_RELEASE(mShell);
}
NS_IMETHODIMP
PresShell::CantRenderReplacedElement(nsIPresContext* aPresContext,
nsIFrame* aFrame)
{
nsIEventQueueService* eventService;
nsresult rv;
// Notify the style set, but post the notification so it doesn't happen
// now
rv = nsServiceManager::GetService(kEventQueueServiceCID,
kIEventQueueServiceIID,
(nsISupports **)&eventService);
if (NS_SUCCEEDED(rv)) {
PLEventQueue* eventQueue;
rv = eventService->GetThreadEventQueue(PR_GetCurrentThread(),
&eventQueue);
nsServiceManager::ReleaseService(kEventQueueServiceCID, eventService);
if (nsnull != eventQueue) {
CantRenderReplacedElementEvent* ev;
ev = new CantRenderReplacedElementEvent(this, aFrame);
PL_PostEvent(eventQueue, ev);
}
}
return rv;
}
#ifdef NS_DEBUG
static char*
ContentTag(nsIContent* aContent, PRIntn aSlot)

8
layout/base/public/nsIPresShell.h
Просмотреть файл

@ -157,6 +157,14 @@ public:
*/
NS_IMETHOD CreateRenderingContext(nsIFrame *aFrame, nsIRenderingContext *&aContext) = 0;
// Notification that we were unable to render a replaced element.
// Called when the replaced element can not be rendered, and we should
// instead render the element's contents.
// The content object associated with aFrame should either be a IMG
// element or an OBJECT element.
NS_IMETHOD CantRenderReplacedElement(nsIPresContext* aPresContext,
nsIFrame* aFrame) = 0;
// XXX events
// XXX selection

24
layout/generic/nsImageFrame.cpp
Просмотреть файл

@ -136,11 +136,21 @@ nsHTMLImageLoader::StartLoadImage(nsIPresContext* aPresContext,
// Get absolute url the first time through
nsresult rv;
nsAutoString src;
if (mLoadImageFailed || (nsnull == mURLSpec)) {
#ifdef _WIN32
if (mLoadImageFailed) {
// We've already notified the pres shell that we're unable to render
// the image so just return
return NS_OK;
} else if (nsnull == mURLSpec) {
// No URI was specified for the src. Indicate we're unable to load the
// image and notify the pres shell
mLoadImageFailed = PR_TRUE;
nsIPresShell* presShell = aPresContext->GetShell();
presShell->CantRenderReplacedElement(aPresContext, aForFrame);
NS_RELEASE(presShell);
return NS_OK;
#else
if (mLoadImageFailed || (nsnull == mURLSpec)) {
src.Append(BROKEN_IMAGE_URL);
#endif
} else if (nsnull == mImageLoader) {
@ -372,16 +382,10 @@ UpdateImageFrame(nsIPresContext& aPresContext, nsIFrame* aFrame,
NS_RELEASE(content);
}
} else if (NS_IMAGE_LOAD_STATUS_ERROR & aStatus) {
#if 0
// We failed to load the image. Notify the style system
// We failed to load the image. Notify the pres shell
nsIPresShell* presShell = aPresContext.GetShell();
nsIStyleSet* styleSet = presShell->GetStyleSet();
styleSet->CantRenderReplacedElement(&aPresContext, aFrame);
NS_RELEASE(styleSet);
presShell->CantRenderReplacedElement(&aPresContext, aFrame);
NS_RELEASE(presShell);
#else
;
#endif
}
return NS_OK;
}
@ -673,7 +677,7 @@ nsImageFrame::Paint(nsIPresContext& aPresContext,
}
if (eFramePaintLayer_Content == aWhichLayer) {
// Now render the image into our inner area (the area without the
// Now render the image into our content area (the area inside the
// borders and padding)
nsRect inner;
GetInnerArea(&aPresContext, inner);

24
layout/html/base/src/nsImageFrame.cpp
Просмотреть файл

@ -136,11 +136,21 @@ nsHTMLImageLoader::StartLoadImage(nsIPresContext* aPresContext,
// Get absolute url the first time through
nsresult rv;
nsAutoString src;
if (mLoadImageFailed || (nsnull == mURLSpec)) {
#ifdef _WIN32
if (mLoadImageFailed) {
// We've already notified the pres shell that we're unable to render
// the image so just return
return NS_OK;
} else if (nsnull == mURLSpec) {
// No URI was specified for the src. Indicate we're unable to load the
// image and notify the pres shell
mLoadImageFailed = PR_TRUE;
nsIPresShell* presShell = aPresContext->GetShell();
presShell->CantRenderReplacedElement(aPresContext, aForFrame);
NS_RELEASE(presShell);
return NS_OK;
#else
if (mLoadImageFailed || (nsnull == mURLSpec)) {
src.Append(BROKEN_IMAGE_URL);
#endif
} else if (nsnull == mImageLoader) {
@ -372,16 +382,10 @@ UpdateImageFrame(nsIPresContext& aPresContext, nsIFrame* aFrame,
NS_RELEASE(content);
}
} else if (NS_IMAGE_LOAD_STATUS_ERROR & aStatus) {
#if 0
// We failed to load the image. Notify the style system
// We failed to load the image. Notify the pres shell
nsIPresShell* presShell = aPresContext.GetShell();
nsIStyleSet* styleSet = presShell->GetStyleSet();
styleSet->CantRenderReplacedElement(&aPresContext, aFrame);
NS_RELEASE(styleSet);
presShell->CantRenderReplacedElement(&aPresContext, aFrame);
NS_RELEASE(presShell);
#else
;
#endif
}
return NS_OK;
}
@ -673,7 +677,7 @@ nsImageFrame::Paint(nsIPresContext& aPresContext,
}
if (eFramePaintLayer_Content == aWhichLayer) {
// Now render the image into our inner area (the area without the
// Now render the image into our content area (the area inside the
// borders and padding)
nsRect inner;
GetInnerArea(&aPresContext, inner);

98
layout/html/base/src/nsPresShell.cpp
Просмотреть файл

@ -49,6 +49,9 @@
#include "nsIDOMElement.h"
#include "nsHTMLAtoms.h"
#include "nsCOMPtr.h"
#include "nsIEventQueueService.h"
#include "nsXPComCIID.h"
#include "nsIServiceManager.h"
static PRBool gsNoisyRefs = PR_FALSE;
#undef NOISY
@ -146,18 +149,23 @@ FrameHashTable::Remove(nsIFrame* aKey)
//----------------------------------------------------------------------
// Class IID's
static NS_DEFINE_IID(kEventQueueServiceCID, NS_EVENTQUEUESERVICE_CID);
static NS_DEFINE_IID(kRangeListCID, NS_RANGELIST_CID);
static NS_DEFINE_IID(kCRangeCID, NS_RANGE_CID);
// IID's
static NS_DEFINE_IID(kISupportsIID, NS_ISUPPORTS_IID);
static NS_DEFINE_IID(kIPresShellIID, NS_IPRESSHELL_IID);
static NS_DEFINE_IID(kIDocumentObserverIID, NS_IDOCUMENT_OBSERVER_IID);
static NS_DEFINE_IID(kIViewObserverIID, NS_IVIEWOBSERVER_IID);
static NS_DEFINE_IID(kRangeListCID, NS_RANGELIST_CID);
static NS_DEFINE_IID(kISelectionIID, NS_ISELECTION_IID);
static NS_DEFINE_IID(kICollectionIID, NS_ICOLLECTION_IID);
static NS_DEFINE_IID(kIDOMNodeIID, NS_IDOMNODE_IID);
static NS_DEFINE_IID(kIDOMRangeIID, NS_IDOMRANGE_IID);
static NS_DEFINE_IID(kCRangeCID, NS_RANGE_CID);
static NS_DEFINE_IID(kIDOMDocumentIID, NS_IDOMDOCUMENT_IID);
static NS_DEFINE_IID(kIFocusTrackerIID, NS_IFOCUSTRACKER_IID);
static NS_DEFINE_IID(kIEventQueueServiceIID, NS_IEVENTQUEUESERVICE_IID);
class PresShell : public nsIPresShell, public nsIViewObserver,
@ -256,6 +264,8 @@ public:
NS_IMETHOD ProcessReflowCommands();
virtual void ClearFrameRefs(nsIFrame*);
NS_IMETHOD CreateRenderingContext(nsIFrame *aFrame, nsIRenderingContext *&aContext);
NS_IMETHOD CantRenderReplacedElement(nsIPresContext* aPresContext,
nsIFrame* aFrame);
//nsIViewObserver interface
@ -272,6 +282,10 @@ public:
NS_IMETHOD SetFocus(nsIFrame *aFrame, nsIFrame *aAnchorFrame);
NS_IMETHOD GetFocus(nsIFrame **aFrame, nsIFrame **aAnchorFrame);
// implementation
void HandleCantRenderReplacedElementEvent(nsIFrame* aFrame);
protected:
~PresShell();
@ -1034,8 +1048,8 @@ PresShell::ClearFrameRefs(nsIFrame* aFrame)
}
}
NS_IMETHODIMP PresShell :: CreateRenderingContext(nsIFrame *aFrame,
nsIRenderingContext *&aContext)
NS_IMETHODIMP
PresShell::CreateRenderingContext(nsIFrame *aFrame, nsIRenderingContext *&aContext)
{
nsIWidget *widget = nsnull;
nsIView *view = nsnull;
@ -1074,6 +1088,82 @@ NS_IMETHODIMP PresShell :: CreateRenderingContext(nsIFrame *aFrame,
return rv;
}
void
PresShell::HandleCantRenderReplacedElementEvent(nsIFrame* aFrame)
{
// Double-check that we haven't deleted the frame hierarchy
// XXX If we stay with this model we approach, then we need to observe
// aFrame and if it's deleted null out the pointer in the PL event struct
if (nsnull != mRootFrame) {
mStyleSet->CantRenderReplacedElement(mPresContext, aFrame);
ProcessReflowCommands();
}
}
struct CantRenderReplacedElementEvent : public PLEvent {
CantRenderReplacedElementEvent(PresShell* aShell, nsIFrame* aFrame);
~CantRenderReplacedElementEvent();
PresShell* mShell;
nsIFrame* mFrame;
};
static void PR_CALLBACK
HandlePLEvent(CantRenderReplacedElementEvent* aEvent)
{
aEvent->mShell->HandleCantRenderReplacedElementEvent(aEvent->mFrame);
}
static void PR_CALLBACK
DestroyPLEvent(CantRenderReplacedElementEvent* aEvent)
{
delete aEvent;
}
CantRenderReplacedElementEvent::CantRenderReplacedElementEvent(PresShell* aShell,
nsIFrame* aFrame)
{
mShell = aShell;
NS_ADDREF(mShell);
mFrame = aFrame;
PL_InitEvent(this, nsnull, (PLHandleEventProc)::HandlePLEvent,
(PLDestroyEventProc)::DestroyPLEvent);
}
CantRenderReplacedElementEvent::~CantRenderReplacedElementEvent()
{
NS_RELEASE(mShell);
}
NS_IMETHODIMP
PresShell::CantRenderReplacedElement(nsIPresContext* aPresContext,
nsIFrame* aFrame)
{
nsIEventQueueService* eventService;
nsresult rv;
// Notify the style set, but post the notification so it doesn't happen
// now
rv = nsServiceManager::GetService(kEventQueueServiceCID,
kIEventQueueServiceIID,
(nsISupports **)&eventService);
if (NS_SUCCEEDED(rv)) {
PLEventQueue* eventQueue;
rv = eventService->GetThreadEventQueue(PR_GetCurrentThread(),
&eventQueue);
nsServiceManager::ReleaseService(kEventQueueServiceCID, eventService);
if (nsnull != eventQueue) {
CantRenderReplacedElementEvent* ev;
ev = new CantRenderReplacedElementEvent(this, aFrame);
PL_PostEvent(eventQueue, ev);
}
}
return rv;
}
#ifdef NS_DEBUG
static char*
ContentTag(nsIContent* aContent, PRIntn aSlot)