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gecko-dev/dom/base/nsDOMWindowUtils.cpp

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (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/MPL/
*
* 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.org code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "nsIDocShell.h"
#include "nsPresContext.h"
#include "nsDOMClassInfo.h"
#include "nsDOMError.h"
#include "nsIDOMNSEvent.h"
#include "nsDOMWindowUtils.h"
#include "nsGlobalWindow.h"
#include "nsIDocument.h"
#include "nsFocusManager.h"
#include "nsIEventStateManager.h"
#include "nsIScrollableView.h"
#include "nsContentUtils.h"
#include "nsIFrame.h"
#include "nsIWidget.h"
#include "nsGUIEvent.h"
#include "nsIParser.h"
#include "nsJSEnvironment.h"
#include "nsIViewManager.h"
#include "nsIDOMHTMLCanvasElement.h"
#include "nsICanvasElement.h"
#include "gfxContext.h"
#include "gfxImageSurface.h"
#if defined(MOZ_X11) && defined(MOZ_WIDGET_GTK2)
#include <gdk/gdk.h>
#include <gdk/gdkx.h>
#endif
NS_INTERFACE_MAP_BEGIN(nsDOMWindowUtils)
NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIDOMWindowUtils)
NS_INTERFACE_MAP_ENTRY(nsIDOMWindowUtils)
NS_INTERFACE_MAP_ENTRY(nsISupportsWeakReference)
NS_DOM_INTERFACE_MAP_ENTRY_CLASSINFO(WindowUtils)
NS_INTERFACE_MAP_END
NS_IMPL_ADDREF(nsDOMWindowUtils)
NS_IMPL_RELEASE(nsDOMWindowUtils)
nsDOMWindowUtils::nsDOMWindowUtils(nsGlobalWindow *aWindow)
: mWindow(aWindow)
{
}
nsDOMWindowUtils::~nsDOMWindowUtils()
{
}
nsPresContext*
nsDOMWindowUtils::GetPresContext()
{
if (!mWindow)
return nsnull;
nsIDocShell *docShell = mWindow->GetDocShell();
if (!docShell)
return nsnull;
nsCOMPtr<nsPresContext> presContext;
docShell->GetPresContext(getter_AddRefs(presContext));
return presContext;
}
NS_IMETHODIMP
nsDOMWindowUtils::GetImageAnimationMode(PRUint16 *aMode)
{
NS_ENSURE_ARG_POINTER(aMode);
*aMode = 0;
nsPresContext* presContext = GetPresContext();
if (presContext) {
*aMode = presContext->ImageAnimationMode();
return NS_OK;
}
return NS_ERROR_NOT_AVAILABLE;
}
NS_IMETHODIMP
nsDOMWindowUtils::SetImageAnimationMode(PRUint16 aMode)
{
nsPresContext* presContext = GetPresContext();
if (presContext) {
presContext->SetImageAnimationMode(aMode);
return NS_OK;
}
return NS_ERROR_NOT_AVAILABLE;
}
NS_IMETHODIMP
nsDOMWindowUtils::GetDocCharsetIsForced(PRBool *aIsForced)
{
*aIsForced = PR_FALSE;
PRBool hasCap = PR_FALSE;
if (NS_FAILED(nsContentUtils::GetSecurityManager()->IsCapabilityEnabled("UniversalXPConnect", &hasCap)) || !hasCap)
return NS_ERROR_DOM_SECURITY_ERR;
if (mWindow) {
nsCOMPtr<nsIDocument> doc(do_QueryInterface(mWindow->GetExtantDocument()));
*aIsForced = doc &&
doc->GetDocumentCharacterSetSource() >= kCharsetFromParentForced;
}
return NS_OK;
}
NS_IMETHODIMP
nsDOMWindowUtils::GetDocumentMetadata(const nsAString& aName,
nsAString& aValue)
{
PRBool hasCap = PR_FALSE;
if (NS_FAILED(nsContentUtils::GetSecurityManager()->IsCapabilityEnabled("UniversalXPConnect", &hasCap))
|| !hasCap)
return NS_ERROR_DOM_SECURITY_ERR;
if (mWindow) {
nsCOMPtr<nsIDocument> doc(do_QueryInterface(mWindow->GetExtantDocument()));
if (doc) {
nsCOMPtr<nsIAtom> name = do_GetAtom(aName);
doc->GetHeaderData(name, aValue);
return NS_OK;
}
}
aValue.Truncate();
return NS_OK;
}
NS_IMETHODIMP
nsDOMWindowUtils::Redraw(PRUint32 aCount, PRUint32 *aDurationOut)
{
nsresult rv;
if (aCount == 0)
aCount = 1;
nsCOMPtr<nsIDocShell> docShell = mWindow->GetDocShell();
if (docShell) {
nsCOMPtr<nsIPresShell> presShell;
rv = docShell->GetPresShell(getter_AddRefs(presShell));
if (NS_SUCCEEDED(rv) && presShell) {
nsIFrame *rootFrame = presShell->GetRootFrame();
if (rootFrame) {
nsRect r(nsPoint(0, 0), rootFrame->GetSize());
PRIntervalTime iStart = PR_IntervalNow();
for (PRUint32 i = 0; i < aCount; i++)
rootFrame->InvalidateWithFlags(r, nsIFrame::INVALIDATE_IMMEDIATE);
#if defined(MOZ_X11) && defined(MOZ_WIDGET_GTK2)
XSync(GDK_DISPLAY(), False);
#endif
*aDurationOut = PR_IntervalToMilliseconds(PR_IntervalNow() - iStart);
return NS_OK;
}
}
}
return NS_ERROR_FAILURE;
}
NS_IMETHODIMP
nsDOMWindowUtils::SendMouseEvent(const nsAString& aType,
float aX,
float aY,
PRInt32 aButton,
PRInt32 aClickCount,
PRInt32 aModifiers,
PRBool aIgnoreRootScrollFrame)
{
PRBool hasCap = PR_FALSE;
if (NS_FAILED(nsContentUtils::GetSecurityManager()->IsCapabilityEnabled("UniversalXPConnect", &hasCap))
|| !hasCap)
return NS_ERROR_DOM_SECURITY_ERR;
// get the widget to send the event to
nsPoint offset;
nsCOMPtr<nsIWidget> widget = GetWidget(&offset);
if (!widget)
return NS_ERROR_FAILURE;
PRInt32 msg;
PRBool contextMenuKey = PR_FALSE;
if (aType.EqualsLiteral("mousedown"))
msg = NS_MOUSE_BUTTON_DOWN;
else if (aType.EqualsLiteral("mouseup"))
msg = NS_MOUSE_BUTTON_UP;
else if (aType.EqualsLiteral("mousemove"))
msg = NS_MOUSE_MOVE;
else if (aType.EqualsLiteral("mouseover"))
msg = NS_MOUSE_ENTER;
else if (aType.EqualsLiteral("mouseout"))
msg = NS_MOUSE_EXIT;
else if (aType.EqualsLiteral("contextmenu")) {
msg = NS_CONTEXTMENU;
contextMenuKey = (aButton == 0);
} else
return NS_ERROR_FAILURE;
nsMouseEvent event(PR_TRUE, msg, widget, nsMouseEvent::eReal,
contextMenuKey ?
nsMouseEvent::eContextMenuKey : nsMouseEvent::eNormal);
event.isShift = (aModifiers & nsIDOMNSEvent::SHIFT_MASK) ? PR_TRUE : PR_FALSE;
event.isControl = (aModifiers & nsIDOMNSEvent::CONTROL_MASK) ? PR_TRUE : PR_FALSE;
event.isAlt = (aModifiers & nsIDOMNSEvent::ALT_MASK) ? PR_TRUE : PR_FALSE;
event.isMeta = (aModifiers & nsIDOMNSEvent::META_MASK) ? PR_TRUE : PR_FALSE;
event.button = aButton;
event.widget = widget;
event.clickCount = aClickCount;
event.time = PR_IntervalNow();
event.flags |= NS_EVENT_FLAG_SYNTETIC_TEST_EVENT;
float appPerDev = float(widget->GetDeviceContext()->AppUnitsPerDevPixel());
event.refPoint.x =
NSAppUnitsToIntPixels(nsPresContext::CSSPixelsToAppUnits(aX) + offset.x,
appPerDev);
event.refPoint.y =
NSAppUnitsToIntPixels(nsPresContext::CSSPixelsToAppUnits(aY) + offset.y,
appPerDev);
event.ignoreRootScrollFrame = aIgnoreRootScrollFrame;
nsEventStatus status;
return widget->DispatchEvent(&event, status);
}
NS_IMETHODIMP
nsDOMWindowUtils::SendMouseScrollEvent(const nsAString& aType,
float aX,
float aY,
PRInt32 aButton,
PRInt32 aScrollFlags,
PRInt32 aDelta,
PRInt32 aModifiers)
{
PRBool hasCap = PR_FALSE;
if (NS_FAILED(nsContentUtils::GetSecurityManager()->IsCapabilityEnabled("UniversalXPConnect", &hasCap))
|| !hasCap)
return NS_ERROR_DOM_SECURITY_ERR;
// get the widget to send the event to
nsPoint offset;
nsCOMPtr<nsIWidget> widget = GetWidget(&offset);
if (!widget)
return NS_ERROR_NULL_POINTER;
PRInt32 msg;
if (aType.EqualsLiteral("DOMMouseScroll"))
msg = NS_MOUSE_SCROLL;
else if (aType.EqualsLiteral("MozMousePixelScroll"))
msg = NS_MOUSE_PIXEL_SCROLL;
else
return NS_ERROR_UNEXPECTED;
nsMouseScrollEvent event(PR_TRUE, msg, widget);
event.isShift = (aModifiers & nsIDOMNSEvent::SHIFT_MASK) ? PR_TRUE : PR_FALSE;
event.isControl = (aModifiers & nsIDOMNSEvent::CONTROL_MASK) ? PR_TRUE : PR_FALSE;
event.isAlt = (aModifiers & nsIDOMNSEvent::ALT_MASK) ? PR_TRUE : PR_FALSE;
event.isMeta = (aModifiers & nsIDOMNSEvent::META_MASK) ? PR_TRUE : PR_FALSE;
event.button = aButton;
event.widget = widget;
event.delta = aDelta;
event.scrollFlags = aScrollFlags;
event.time = PR_IntervalNow();
float appPerDev = float(widget->GetDeviceContext()->AppUnitsPerDevPixel());
event.refPoint.x =
NSAppUnitsToIntPixels(nsPresContext::CSSPixelsToAppUnits(aX) + offset.x,
appPerDev);
event.refPoint.y =
NSAppUnitsToIntPixels(nsPresContext::CSSPixelsToAppUnits(aY) + offset.y,
appPerDev);
nsEventStatus status;
return widget->DispatchEvent(&event, status);
}
NS_IMETHODIMP
nsDOMWindowUtils::SendKeyEvent(const nsAString& aType,
PRInt32 aKeyCode,
PRInt32 aCharCode,
PRInt32 aModifiers,
PRBool aPreventDefault,
PRBool* aDefaultActionTaken)
{
PRBool hasCap = PR_FALSE;
if (NS_FAILED(nsContentUtils::GetSecurityManager()->IsCapabilityEnabled("UniversalXPConnect", &hasCap))
|| !hasCap)
return NS_ERROR_DOM_SECURITY_ERR;
// get the widget to send the event to
nsCOMPtr<nsIWidget> widget = GetWidget();
if (!widget)
return NS_ERROR_FAILURE;
PRInt32 msg;
if (aType.EqualsLiteral("keydown"))
msg = NS_KEY_DOWN;
else if (aType.EqualsLiteral("keyup"))
msg = NS_KEY_UP;
else if (aType.EqualsLiteral("keypress"))
msg = NS_KEY_PRESS;
else
return NS_ERROR_FAILURE;
nsKeyEvent event(PR_TRUE, msg, widget);
event.isShift = (aModifiers & nsIDOMNSEvent::SHIFT_MASK) ? PR_TRUE : PR_FALSE;
event.isControl = (aModifiers & nsIDOMNSEvent::CONTROL_MASK) ? PR_TRUE : PR_FALSE;
event.isAlt = (aModifiers & nsIDOMNSEvent::ALT_MASK) ? PR_TRUE : PR_FALSE;
event.isMeta = (aModifiers & nsIDOMNSEvent::META_MASK) ? PR_TRUE : PR_FALSE;
event.keyCode = aKeyCode;
event.charCode = aCharCode;
event.refPoint.x = event.refPoint.y = 0;
event.time = PR_IntervalNow();
if (aPreventDefault) {
event.flags |= NS_EVENT_FLAG_NO_DEFAULT;
}
nsEventStatus status;
nsresult rv = widget->DispatchEvent(&event, status);
NS_ENSURE_SUCCESS(rv, rv);
*aDefaultActionTaken = (status != nsEventStatus_eConsumeNoDefault);
return NS_OK;
}
NS_IMETHODIMP
nsDOMWindowUtils::SendNativeKeyEvent(PRInt32 aNativeKeyboardLayout,
PRInt32 aNativeKeyCode,
PRInt32 aModifiers,
const nsAString& aCharacters,
const nsAString& aUnmodifiedCharacters)
{
PRBool hasCap = PR_FALSE;
if (NS_FAILED(nsContentUtils::GetSecurityManager()->IsCapabilityEnabled("UniversalXPConnect", &hasCap))
|| !hasCap)
return NS_ERROR_DOM_SECURITY_ERR;
// get the widget to send the event to
nsCOMPtr<nsIWidget> widget = GetWidget();
if (!widget)
return NS_ERROR_FAILURE;
return widget->SynthesizeNativeKeyEvent(aNativeKeyboardLayout, aNativeKeyCode,
aModifiers, aCharacters, aUnmodifiedCharacters);
}
NS_IMETHODIMP
nsDOMWindowUtils::ActivateNativeMenuItemAt(const nsAString& indexString)
{
PRBool hasCap = PR_FALSE;
if (NS_FAILED(nsContentUtils::GetSecurityManager()->IsCapabilityEnabled("UniversalXPConnect", &hasCap))
|| !hasCap)
return NS_ERROR_DOM_SECURITY_ERR;
// get the widget to send the event to
nsCOMPtr<nsIWidget> widget = GetWidget();
if (!widget)
return NS_ERROR_FAILURE;
return widget->ActivateNativeMenuItemAt(indexString);
}
NS_IMETHODIMP
nsDOMWindowUtils::ForceUpdateNativeMenuAt(const nsAString& indexString)
{
PRBool hasCap = PR_FALSE;
if (NS_FAILED(nsContentUtils::GetSecurityManager()->IsCapabilityEnabled("UniversalXPConnect", &hasCap))
|| !hasCap)
return NS_ERROR_DOM_SECURITY_ERR;
// get the widget to send the event to
nsCOMPtr<nsIWidget> widget = GetWidget();
if (!widget)
return NS_ERROR_FAILURE;
return widget->ForceUpdateNativeMenuAt(indexString);
}
nsIWidget*
nsDOMWindowUtils::GetWidget(nsPoint* aOffset)
{
if (mWindow) {
nsIDocShell *docShell = mWindow->GetDocShell();
if (docShell) {
nsCOMPtr<nsIPresShell> presShell;
docShell->GetPresShell(getter_AddRefs(presShell));
if (presShell) {
nsIFrame* frame = presShell->GetRootFrame();
if (frame)
return frame->GetView()->GetNearestWidget(aOffset);
}
}
}
return nsnull;
}
NS_IMETHODIMP
nsDOMWindowUtils::Focus(nsIDOMElement* aElement)
{
PRBool hasCap = PR_FALSE;
if (NS_FAILED(nsContentUtils::GetSecurityManager()->IsCapabilityEnabled(
"UniversalXPConnect", &hasCap)) || !hasCap)
return NS_ERROR_DOM_SECURITY_ERR;
nsIFocusManager* fm = nsFocusManager::GetFocusManager();
if (fm) {
if (aElement)
fm->SetFocus(aElement, 0);
else
fm->ClearFocus(mWindow);
}
return NS_OK;
}
NS_IMETHODIMP
nsDOMWindowUtils::GarbageCollect()
{
// NOTE: Only do this in NON debug builds, as this function can useful
// during debugging.
#ifndef DEBUG
PRBool hasCap = PR_FALSE;
if (NS_FAILED(nsContentUtils::GetSecurityManager()->
IsCapabilityEnabled("UniversalXPConnect", &hasCap))
|| !hasCap)
return NS_ERROR_DOM_SECURITY_ERR;
#endif
nsJSContext::CC();
nsJSContext::CC();
return NS_OK;
}
NS_IMETHODIMP
nsDOMWindowUtils::ProcessUpdates()
{
nsPresContext* presContext = GetPresContext();
if (!presContext)
return NS_ERROR_UNEXPECTED;
nsIPresShell* shell = presContext->GetPresShell();
if (!shell)
return NS_ERROR_UNEXPECTED;
nsIViewManager *viewManager = shell->GetViewManager();
if (!viewManager)
return NS_ERROR_UNEXPECTED;
nsIViewManager::UpdateViewBatch batch;
batch.BeginUpdateViewBatch(viewManager);
batch.EndUpdateViewBatch(NS_VMREFRESH_IMMEDIATE);
return NS_OK;
}
NS_IMETHODIMP
nsDOMWindowUtils::SendSimpleGestureEvent(const nsAString& aType,
float aX,
float aY,
PRUint32 aDirection,
PRFloat64 aDelta,
PRInt32 aModifiers)
{
PRBool hasCap = PR_FALSE;
if (NS_FAILED(nsContentUtils::GetSecurityManager()->IsCapabilityEnabled("UniversalXPConnect", &hasCap))
|| !hasCap)
return NS_ERROR_DOM_SECURITY_ERR;
// get the widget to send the event to
nsPoint offset;
nsCOMPtr<nsIWidget> widget = GetWidget(&offset);
if (!widget)
return NS_ERROR_FAILURE;
PRInt32 msg;
if (aType.EqualsLiteral("MozSwipeGesture"))
msg = NS_SIMPLE_GESTURE_SWIPE;
else if (aType.EqualsLiteral("MozMagnifyGestureStart"))
msg = NS_SIMPLE_GESTURE_MAGNIFY_START;
else if (aType.EqualsLiteral("MozMagnifyGestureUpdate"))
msg = NS_SIMPLE_GESTURE_MAGNIFY_UPDATE;
else if (aType.EqualsLiteral("MozMagnifyGesture"))
msg = NS_SIMPLE_GESTURE_MAGNIFY;
else if (aType.EqualsLiteral("MozRotateGestureStart"))
msg = NS_SIMPLE_GESTURE_ROTATE_START;
else if (aType.EqualsLiteral("MozRotateGestureUpdate"))
msg = NS_SIMPLE_GESTURE_ROTATE_UPDATE;
else if (aType.EqualsLiteral("MozRotateGesture"))
msg = NS_SIMPLE_GESTURE_ROTATE;
else if (aType.EqualsLiteral("MozTapGesture"))
msg = NS_SIMPLE_GESTURE_TAP;
else if (aType.EqualsLiteral("MozPressTapGesture"))
msg = NS_SIMPLE_GESTURE_PRESSTAP;
else
return NS_ERROR_FAILURE;
nsSimpleGestureEvent event(PR_TRUE, msg, widget, aDirection, aDelta);
event.isShift = (aModifiers & nsIDOMNSEvent::SHIFT_MASK) ? PR_TRUE : PR_FALSE;
event.isControl = (aModifiers & nsIDOMNSEvent::CONTROL_MASK) ? PR_TRUE : PR_FALSE;
event.isAlt = (aModifiers & nsIDOMNSEvent::ALT_MASK) ? PR_TRUE : PR_FALSE;
event.isMeta = (aModifiers & nsIDOMNSEvent::META_MASK) ? PR_TRUE : PR_FALSE;
event.time = PR_IntervalNow();
float appPerDev = float(widget->GetDeviceContext()->AppUnitsPerDevPixel());
event.refPoint.x =
NSAppUnitsToIntPixels(nsPresContext::CSSPixelsToAppUnits(aX) + offset.x,
appPerDev);
event.refPoint.y =
NSAppUnitsToIntPixels(nsPresContext::CSSPixelsToAppUnits(aY) + offset.y,
appPerDev);
nsEventStatus status;
return widget->DispatchEvent(&event, status);
}
NS_IMETHODIMP
nsDOMWindowUtils::ElementFromPoint(PRInt32 aX, PRInt32 aY,
PRBool aIgnoreRootScrollFrame,
PRBool aFlushLayout,
nsIDOMElement** aReturn)
{
nsCOMPtr<nsIDocument> doc(do_QueryInterface(mWindow->GetExtantDocument()));
NS_ENSURE_STATE(doc);
return doc->ElementFromPointHelper(aX, aY, aIgnoreRootScrollFrame, aFlushLayout,
aReturn);
}
static already_AddRefed<gfxImageSurface>
CanvasToImageSurface(nsIDOMHTMLCanvasElement *canvas)
{
PRUint32 w, h;
nsresult rv;
nsCOMPtr<nsICanvasElement> elt = do_QueryInterface(canvas);
rv = elt->GetSize(&w, &h);
if (NS_FAILED(rv))
return nsnull;
nsRefPtr<gfxImageSurface> img = new gfxImageSurface(gfxIntSize(w, h), gfxASurface::ImageFormatARGB32);
if (img == nsnull)
return nsnull;
nsRefPtr<gfxContext> ctx = new gfxContext(img);
if (ctx == nsnull)
return nsnull;
ctx->SetOperator(gfxContext::OPERATOR_CLEAR);
ctx->Paint();
ctx->SetOperator(gfxContext::OPERATOR_OVER);
rv = elt->RenderContexts(ctx, gfxPattern::FILTER_NEAREST);
if (NS_FAILED(rv))
return nsnull;
ctx = nsnull;
return img.forget();
}
NS_IMETHODIMP
nsDOMWindowUtils::CompareCanvases(nsIDOMHTMLCanvasElement *aCanvas1,
nsIDOMHTMLCanvasElement *aCanvas2,
PRUint32* aMaxDifference,
PRUint32* retVal)
{
PRBool hasCap = PR_FALSE;
if (NS_FAILED(nsContentUtils::GetSecurityManager()->IsCapabilityEnabled("UniversalXPConnect", &hasCap)) || !hasCap)
return NS_ERROR_DOM_SECURITY_ERR;
if (aCanvas1 == nsnull ||
aCanvas2 == nsnull ||
retVal == nsnull)
return NS_ERROR_FAILURE;
nsRefPtr<gfxImageSurface> img1 = CanvasToImageSurface(aCanvas1);
nsRefPtr<gfxImageSurface> img2 = CanvasToImageSurface(aCanvas2);
if (img1 == nsnull || img2 == nsnull ||
img1->GetSize() != img2->GetSize() ||
img1->Stride() != img2->Stride())
return NS_ERROR_FAILURE;
int v;
gfxIntSize size = img1->GetSize();
PRUint32 stride = img1->Stride();
// we can optimize for the common all-pass case
if (stride == (PRUint32) size.width * 4) {
v = memcmp(img1->Data(), img2->Data(), size.width * size.height * 4);
if (v == 0) {
if (aMaxDifference)
*aMaxDifference = 0;
*retVal = 0;
return NS_OK;
}
}
PRUint32 dc = 0;
PRUint32 different = 0;
for (int j = 0; j < size.height; j++) {
unsigned char *p1 = img1->Data() + j*stride;
unsigned char *p2 = img2->Data() + j*stride;
v = memcmp(p1, p2, stride);
if (v) {
for (int i = 0; i < size.width; i++) {
if (*(PRUint32*) p1 != *(PRUint32*) p2) {
different++;
dc = PR_MAX(abs(p1[0] - p2[0]), dc);
dc = PR_MAX(abs(p1[1] - p2[1]), dc);
dc = PR_MAX(abs(p1[2] - p2[2]), dc);
dc = PR_MAX(abs(p1[3] - p2[3]), dc);
}
p1 += 4;
p2 += 4;
}
}
}
if (aMaxDifference)
*aMaxDifference = dc;
*retVal = different;
return NS_OK;
}
NS_IMETHODIMP
nsDOMWindowUtils::GetIsMozAfterPaintPending(PRBool *aResult)
{
*aResult = PR_FALSE;
nsPresContext* presContext = GetPresContext();
if (!presContext)
return NS_OK;
*aResult = presContext->IsDOMPaintEventPending();
return NS_OK;
}
NS_IMETHODIMP
nsDOMWindowUtils::ClearMozAfterPaintEvents()
{
nsPresContext* presContext = GetPresContext();
if (!presContext)
return NS_OK;
presContext->ClearMozAfterPaintEvents();
return NS_OK;
}
NS_IMETHODIMP
nsDOMWindowUtils::DisableNonTestMouseEvents(PRBool aDisable)
{
PRBool hasCap = PR_FALSE;
if (NS_FAILED(nsContentUtils::GetSecurityManager()->
IsCapabilityEnabled("UniversalXPConnect", &hasCap)) ||
!hasCap)
return NS_ERROR_DOM_SECURITY_ERR;
NS_ENSURE_TRUE(mWindow, NS_ERROR_FAILURE);
nsIDocShell *docShell = mWindow->GetDocShell();
NS_ENSURE_TRUE(docShell, NS_ERROR_FAILURE);
nsCOMPtr<nsIPresShell> presShell;
docShell->GetPresShell(getter_AddRefs(presShell));
NS_ENSURE_TRUE(presShell, NS_ERROR_FAILURE);
return presShell->DisableNonTestMouseEvents(aDisable);
}
NS_IMETHODIMP
nsDOMWindowUtils::SuppressEventHandling(PRBool aSuppress)
{
PRBool hasCap = PR_FALSE;
if (NS_FAILED(nsContentUtils::GetSecurityManager()->IsCapabilityEnabled("UniversalXPConnect", &hasCap)) || !hasCap)
return NS_ERROR_DOM_SECURITY_ERR;
nsCOMPtr<nsIDocument> doc(do_QueryInterface(mWindow->GetExtantDocument()));
NS_ENSURE_TRUE(doc, NS_ERROR_FAILURE);
if (aSuppress) {
doc->SuppressEventHandling();
} else {
doc->UnsuppressEventHandlingAndFireEvents(PR_TRUE);
}
return NS_OK;
}
NS_IMETHODIMP
nsDOMWindowUtils::GetScrollXY(PRBool aFlushLayout, PRInt32* aScrollX, PRInt32* aScrollY)
{
nsCOMPtr<nsIDocument> doc(do_QueryInterface(mWindow->GetExtantDocument()));
NS_ENSURE_STATE(doc);
if (aFlushLayout) {
doc->FlushPendingNotifications(Flush_Layout);
}
nscoord xPos = 0, yPos = 0;
nsIPresShell *presShell = doc->GetPrimaryShell();
if (presShell) {
nsIViewManager *viewManager = presShell->GetViewManager();
if (viewManager) {
nsIScrollableView *view = nsnull;
viewManager->GetRootScrollableView(&view);
if (view) {
nsresult rv = view->GetScrollPosition(xPos, yPos);
NS_ENSURE_SUCCESS(rv, rv);
}
}
}
*aScrollX = nsPresContext::AppUnitsToIntCSSPixels(xPos);
*aScrollY = nsPresContext::AppUnitsToIntCSSPixels(yPos);
return NS_OK;
}
NS_IMETHODIMP
nsDOMWindowUtils::GetIMEIsOpen(PRBool *aState)
{
NS_ENSURE_ARG_POINTER(aState);
nsCOMPtr<nsIWidget> widget = GetWidget();
if (!widget)
return NS_ERROR_FAILURE;
// Open state should not be available when IME is not enabled.
PRUint32 enabled;
nsresult rv = widget->GetIMEEnabled(&enabled);
NS_ENSURE_SUCCESS(rv, rv);
if (enabled != nsIWidget::IME_STATUS_ENABLED)
return NS_ERROR_NOT_AVAILABLE;
return widget->GetIMEOpenState(aState);
}
NS_IMETHODIMP
nsDOMWindowUtils::GetIMEStatus(PRUint32 *aState)
{
NS_ENSURE_ARG_POINTER(aState);
nsCOMPtr<nsIWidget> widget = GetWidget();
if (!widget)
return NS_ERROR_FAILURE;
return widget->GetIMEEnabled(aState);
}
NS_IMETHODIMP
nsDOMWindowUtils::GetScreenPixelsPerCSSPixel(float* aScreenPixels)
{
*aScreenPixels = 1;
if (!nsContentUtils::IsCallerTrustedForRead())
return NS_ERROR_DOM_SECURITY_ERR;
nsPresContext* presContext = GetPresContext();
if (!presContext)
return NS_OK;
*aScreenPixels = float(nsPresContext::AppUnitsPerCSSPixel())/
presContext->AppUnitsPerDevPixel();
return NS_OK;
}
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