pjs/dom/public/base/nsPIDOMWindow.h

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=2 sw=2 et tw=80: */
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* 1.1 (the "License"); you may not use this file except in compliance with
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*
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* for the specific language governing rights and limitations under the
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*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
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* the Initial Developer. All Rights Reserved.
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*
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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#ifndef nsPIDOMWindow_h__
#define nsPIDOMWindow_h__
#include "nsISupports.h"
#include "nsIDOMLocation.h"
#include "nsIDOMXULCommandDispatcher.h"
#include "nsIDOMElement.h"
#include "nsIDOMWindowInternal.h"
#include "nsPIDOMEventTarget.h"
#include "nsIDOMDocument.h"
#include "nsCOMPtr.h"
#include "nsEvent.h"
class nsIPrincipal;
// Popup control state enum. The values in this enum must go from most
// permissive to least permissive so that it's safe to push state in
// all situations. Pushing popup state onto the stack never makes the
// current popup state less permissive (see
// nsGlobalWindow::PushPopupControlState()).
enum PopupControlState {
openAllowed = 0, // open that window without worries
openControlled, // it's a popup, but allow it
openAbused, // it's a popup. disallow it, but allow domain override.
openOverridden // disallow window open
};
class nsIDocShell;
class nsIFocusController;
class nsIDocument;
class nsIScriptTimeoutHandler;
class nsPresContext;
struct nsTimeout;
#define NS_PIDOMWINDOW_IID \
{ 0xbf81c452, 0xbd39, 0x4001, \
{ 0x85, 0xf4, 0x21, 0x79, 0x36, 0xc5, 0x85, 0x7d } }
class nsPIDOMWindow : public nsIDOMWindowInternal
{
public:
NS_DECLARE_STATIC_IID_ACCESSOR(NS_PIDOMWINDOW_IID)
virtual nsPIDOMWindow* GetPrivateRoot() = 0;
// This is private because activate/deactivate events are not part
// of the DOM spec.
virtual nsresult Activate() = 0;
virtual nsresult Deactivate() = 0;
nsPIDOMEventTarget* GetChromeEventHandler() const
{
return mChromeEventHandler;
}
PRBool HasMutationListeners(PRUint32 aMutationEventType) const
{
const nsPIDOMWindow *win;
if (IsOuterWindow()) {
win = GetCurrentInnerWindow();
if (!win) {
NS_ERROR("No current inner window available!");
return PR_FALSE;
}
} else {
if (!mOuterWindow) {
NS_ERROR("HasMutationListeners() called on orphan inner window!");
return PR_FALSE;
}
win = this;
}
return (win->mMutationBits & aMutationEventType) != 0;
}
void SetMutationListeners(PRUint32 aType)
{
nsPIDOMWindow *win;
if (IsOuterWindow()) {
win = GetCurrentInnerWindow();
if (!win) {
NS_ERROR("No inner window available to set mutation bits on!");
return;
}
} else {
if (!mOuterWindow) {
NS_ERROR("HasMutationListeners() called on orphan inner window!");
return;
}
win = this;
}
win->mMutationBits |= aType;
}
virtual nsIFocusController* GetRootFocusController() = 0;
// GetExtantDocument provides a backdoor to the DOM GetDocument accessor
nsIDOMDocument* GetExtantDocument() const
{
return mDocument;
}
// Internal getter/setter for the frame element, this version of the
// getter crosses chrome boundaries whereas the public scriptable
// one doesn't for security reasons.
nsIDOMElement* GetFrameElementInternal() const
{
if (mOuterWindow) {
return mOuterWindow->GetFrameElementInternal();
}
NS_ASSERTION(!IsInnerWindow(),
"GetFrameElementInternal() called on orphan inner window");
return mFrameElement;
}
void SetFrameElementInternal(nsIDOMElement *aFrameElement)
{
if (IsOuterWindow()) {
mFrameElement = aFrameElement;
return;
}
if (!mOuterWindow) {
NS_ERROR("frameElement set on inner window with no outer!");
return;
}
mOuterWindow->SetFrameElementInternal(aFrameElement);
}
PRBool IsLoadingOrRunningTimeout() const
{
const nsPIDOMWindow *win = GetCurrentInnerWindow();
if (!win) {
win = this;
}
return !win->mIsDocumentLoaded || win->mRunningTimeout;
}
// Check whether a document is currently loading
PRBool IsLoading() const
{
const nsPIDOMWindow *win;
if (IsOuterWindow()) {
win = GetCurrentInnerWindow();
if (!win) {
NS_ERROR("No current inner window available!");
return PR_FALSE;
}
} else {
if (!mOuterWindow) {
NS_ERROR("IsLoading() called on orphan inner window!");
return PR_FALSE;
}
win = this;
}
return !win->mIsDocumentLoaded;
}
PRBool IsHandlingResizeEvent() const
{
const nsPIDOMWindow *win;
if (IsOuterWindow()) {
win = GetCurrentInnerWindow();
if (!win) {
NS_ERROR("No current inner window available!");
return PR_FALSE;
}
} else {
if (!mOuterWindow) {
NS_ERROR("IsHandlingResizeEvent() called on orphan inner window!");
return PR_FALSE;
}
win = this;
}
return win->mIsHandlingResizeEvent;
}
// Tell this window who opened it. This only has an effect if there is
// either no document currently in the window or if the document is the
// original document this window came with (an about:blank document either
// preloaded into it when it was created, or created by
// CreateAboutBlankContentViewer()).
virtual void SetOpenerScriptPrincipal(nsIPrincipal* aPrincipal) = 0;
// Ask this window who opened it.
virtual nsIPrincipal* GetOpenerScriptPrincipal() = 0;
virtual PopupControlState PushPopupControlState(PopupControlState aState,
PRBool aForce) const = 0;
virtual void PopPopupControlState(PopupControlState state) const = 0;
virtual PopupControlState GetPopupControlState() const = 0;
// Returns an object containing the window's state. This also suspends
// all running timeouts in the window.
virtual nsresult SaveWindowState(nsISupports **aState) = 0;
// Restore the window state from aState.
virtual nsresult RestoreWindowState(nsISupports *aState) = 0;
// Resume suspended timeouts in this window and in child windows.
virtual nsresult ResumeTimeouts() = 0;
// Fire any DOM notification events related to things that happened while
// the window was frozen.
virtual nsresult FireDelayedDOMEvents() = 0;
// Add a timeout to this window.
virtual nsresult SetTimeoutOrInterval(nsIScriptTimeoutHandler *aHandler,
PRInt32 interval,
PRBool aIsInterval, PRInt32 *aReturn) = 0;
// Clear a timeout from this window.
virtual nsresult ClearTimeoutOrInterval(PRInt32 aTimerID) = 0;
nsPIDOMWindow *GetOuterWindow()
{
return mIsInnerWindow ? mOuterWindow : this;
}
nsPIDOMWindow *GetCurrentInnerWindow() const
{
return mInnerWindow;
}
nsPIDOMWindow *EnsureInnerWindow()
{
NS_ASSERTION(IsOuterWindow(), "EnsureInnerWindow called on inner window");
// GetDocument forces inner window creation if there isn't one already
nsCOMPtr<nsIDOMDocument> doc;
GetDocument(getter_AddRefs(doc));
return GetCurrentInnerWindow();
}
PRBool IsInnerWindow() const
{
return mIsInnerWindow;
}
PRBool IsOuterWindow() const
{
return !IsInnerWindow();
}
virtual PRBool WouldReuseInnerWindow(nsIDocument *aNewDocument) = 0;
/**
* Get the docshell in this window.
*/
nsIDocShell *GetDocShell()
{
if (mOuterWindow) {
return mOuterWindow->mDocShell;
}
return mDocShell;
}
/**
* Set or unset the docshell in the window.
*/
virtual void SetDocShell(nsIDocShell *aDocShell) = 0;
/**
* Set a new document in the window. Calling this method will in
* most cases create a new inner window. If this method is called on
* an inner window the call will be forewarded to the outer window,
* if the inner window is not the current inner window an
* NS_ERROR_NOT_AVAILABLE error code will be returned. This may be
* called with a pointer to the current document, in that case the
* document remains unchanged, but a new inner window will be
* created.
*/
virtual nsresult SetNewDocument(nsIDocument *aDocument,
nsISupports *aState,
PRBool aClearScope) = 0;
/**
* Set the opener window. aOriginalOpener is true if and only if this is the
* original opener for the window. That is, it can only be true at most once
* during the life cycle of a window, and then only the first time
* SetOpenerWindow is called. It might never be true, of course, if the
* window does not have an opener when it's created.
*/
virtual void SetOpenerWindow(nsIDOMWindowInternal *aOpener,
PRBool aOriginalOpener) = 0;
virtual void EnsureSizeUpToDate() = 0;
/**
* Callback for notifying a window about a modal dialog being
* opened/closed with the window as a parent.
*/
virtual void EnterModalState() = 0;
virtual void LeaveModalState() = 0;
protected:
// The nsPIDOMWindow constructor. The aOuterWindow argument should
// be null if and only if the created window itself is an outer
// window. In all other cases aOuterWindow should be the outer
// window for the inner window that is being created.
nsPIDOMWindow(nsPIDOMWindow *aOuterWindow)
: mFrameElement(nsnull), mDocShell(nsnull), mModalStateDepth(0),
mRunningTimeout(nsnull), mMutationBits(0), mIsDocumentLoaded(PR_FALSE),
mIsHandlingResizeEvent(PR_FALSE), mIsInnerWindow(aOuterWindow != nsnull),
mInnerWindow(nsnull), mOuterWindow(aOuterWindow)
{
}
// These two variables are special in that they're set to the same
// value on both the outer window and the current inner window. Make
// sure you keep them in sync!
nsCOMPtr<nsPIDOMEventTarget> mChromeEventHandler; // strong
nsCOMPtr<nsIDOMDocument> mDocument; // strong
// These members are only used on outer windows.
nsIDOMElement *mFrameElement; // weak
nsIDocShell *mDocShell; // Weak Reference
PRUint32 mModalStateDepth;
// These variables are only used on inner windows.
nsTimeout *mRunningTimeout;
PRUint32 mMutationBits;
PRPackedBool mIsDocumentLoaded;
PRPackedBool mIsHandlingResizeEvent;
PRPackedBool mIsInnerWindow;
// And these are the references between inner and outer windows.
nsPIDOMWindow *mInnerWindow;
nsPIDOMWindow *mOuterWindow;
};
NS_DEFINE_STATIC_IID_ACCESSOR(nsPIDOMWindow, NS_PIDOMWINDOW_IID)
#ifdef _IMPL_NS_LAYOUT
PopupControlState
PushPopupControlState(PopupControlState aState, PRBool aForce);
void
PopPopupControlState(PopupControlState aState);
#define NS_AUTO_POPUP_STATE_PUSHER nsAutoPopupStatePusherInternal
#else
#define NS_AUTO_POPUP_STATE_PUSHER nsAutoPopupStatePusherExternal
#endif
// Helper class that helps with pushing and popping popup control
// state. Note that this class looks different from within code that's
// part of the layout library than it does in code outside the layout
// library. We give the two object layouts different names so the symbols
// don't conflict, but code should always use the name
// |nsAutoPopupStatePusher|.
class NS_AUTO_POPUP_STATE_PUSHER
{
public:
#ifdef _IMPL_NS_LAYOUT
NS_AUTO_POPUP_STATE_PUSHER(PopupControlState aState, PRBool aForce = PR_FALSE)
: mOldState(::PushPopupControlState(aState, aForce))
{
}
~NS_AUTO_POPUP_STATE_PUSHER()
{
PopPopupControlState(mOldState);
}
#else
NS_AUTO_POPUP_STATE_PUSHER(nsPIDOMWindow *aWindow, PopupControlState aState)
: mWindow(aWindow), mOldState(openAbused)
{
if (aWindow) {
mOldState = aWindow->PushPopupControlState(aState, PR_FALSE);
}
}
~NS_AUTO_POPUP_STATE_PUSHER()
{
if (mWindow) {
mWindow->PopPopupControlState(mOldState);
}
}
#endif
protected:
#ifndef _IMPL_NS_LAYOUT
nsCOMPtr<nsPIDOMWindow> mWindow;
#endif
PopupControlState mOldState;
private:
// Hide so that this class can only be stack-allocated
static void* operator new(size_t /*size*/) CPP_THROW_NEW { return nsnull; }
static void operator delete(void* /*memory*/) {}
};
#define nsAutoPopupStatePusher NS_AUTO_POPUP_STATE_PUSHER
#endif // nsPIDOMWindow_h__