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gecko-dev/layout/base/nsPresContext.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):
* L. David Baron <dbaron@dbaron.org>, Mozilla Corporation
* Ehsan Akhgari <ehsan.akhgari@gmail.com>
*
* 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 ***** */
/* a presentation of a document, part 1 */
#include "nsCOMPtr.h"
#include "nsPresContext.h"
#include "nsIPresShell.h"
#include "nsILinkHandler.h"
#include "nsIDocShellTreeItem.h"
#include "nsIDocShell.h"
#include "nsIContentViewer.h"
#include "nsIDocumentViewer.h"
#include "nsPIDOMWindow.h"
#include "nsStyleSet.h"
#include "nsImageLoader.h"
#include "nsIContent.h"
#include "nsIFrame.h"
#include "nsIRenderingContext.h"
#include "nsIURL.h"
#include "nsIDocument.h"
#include "nsStyleContext.h"
#include "nsILookAndFeel.h"
#include "nsWidgetsCID.h"
#include "nsIComponentManager.h"
#include "nsIURIContentListener.h"
#include "nsIInterfaceRequestor.h"
#include "nsIInterfaceRequestorUtils.h"
#include "nsIServiceManager.h"
#include "nsIDOMElement.h"
#include "nsContentPolicyUtils.h"
#include "nsIDOMWindow.h"
#include "nsXPIDLString.h"
#include "nsIWeakReferenceUtils.h"
#include "nsCSSRendering.h"
#include "prprf.h"
#include "nsContentPolicyUtils.h"
#include "nsIDOMDocument.h"
#include "nsAutoPtr.h"
#include "nsEventStateManager.h"
#include "nsThreadUtils.h"
#include "nsFrameManager.h"
#include "nsLayoutUtils.h"
#include "nsIViewManager.h"
#include "nsCSSFrameConstructor.h"
#include "nsCSSRuleProcessor.h"
#include "nsStyleChangeList.h"
#include "nsRuleNode.h"
#include "nsEventDispatcher.h"
#include "gfxUserFontSet.h"
#include "gfxPlatform.h"
#include "nsCSSRules.h"
#include "nsFontFaceLoader.h"
#include "nsIEventListenerManager.h"
#include "nsStyleStructInlines.h"
#include "nsIAppShell.h"
#include "prenv.h"
#include "nsIPrivateDOMEvent.h"
#include "nsIDOMEventTarget.h"
#include "nsObjectFrame.h"
#include "nsTransitionManager.h"
#include "mozilla/dom/Element.h"
#include "nsIFrameMessageManager.h"
#ifdef MOZ_SMIL
#include "nsSMILAnimationController.h"
#endif // MOZ_SMIL
#ifdef IBMBIDI
#include "nsBidiPresUtils.h"
#endif // IBMBIDI
#include "nsContentUtils.h"
#include "nsPIWindowRoot.h"
// Needed for Start/Stop of Image Animation
#include "imgIContainer.h"
#include "nsIImageLoadingContent.h"
//needed for resetting of image service color
#include "nsLayoutCID.h"
using mozilla::TimeDuration;
using mozilla::TimeStamp;
using namespace mozilla::dom;
static nscolor
MakeColorPref(const char *colstr)
{
PRUint32 red, green, blue;
nscolor colorref;
// 4.x stored RGB color values as a string rather than as an int,
// thus we need to do this conversion
PR_sscanf(colstr, "#%02x%02x%02x", &red, &green, &blue);
colorref = NS_RGB(red, green, blue);
return colorref;
}
int
nsPresContext::PrefChangedCallback(const char* aPrefName, void* instance_data)
{
nsPresContext* presContext = (nsPresContext*)instance_data;
NS_ASSERTION(nsnull != presContext, "bad instance data");
if (nsnull != presContext) {
presContext->PreferenceChanged(aPrefName);
}
return 0; // PREF_OK
}
void
nsPresContext::PrefChangedUpdateTimerCallback(nsITimer *aTimer, void *aClosure)
{
nsPresContext* presContext = (nsPresContext*)aClosure;
NS_ASSERTION(presContext != nsnull, "bad instance data");
if (presContext)
presContext->UpdateAfterPreferencesChanged();
}
#ifdef IBMBIDI
static PRBool
IsVisualCharset(const nsCString& aCharset)
{
if (aCharset.LowerCaseEqualsLiteral("ibm864") // Arabic//ahmed
|| aCharset.LowerCaseEqualsLiteral("ibm862") // Hebrew
|| aCharset.LowerCaseEqualsLiteral("iso-8859-8") ) { // Hebrew
return PR_TRUE; // visual text type
}
else {
return PR_FALSE; // logical text type
}
}
#endif // IBMBIDI
static PLDHashOperator
destroy_loads(const void * aKey, nsRefPtr<nsImageLoader>& aData, void* closure)
{
aData->Destroy();
return PL_DHASH_NEXT;
}
static NS_DEFINE_CID(kLookAndFeelCID, NS_LOOKANDFEEL_CID);
#include "nsContentCID.h"
// NOTE! nsPresContext::operator new() zeroes out all members, so don't
// bother initializing members to 0.
nsPresContext::nsPresContext(nsIDocument* aDocument, nsPresContextType aType)
: mType(aType), mDocument(aDocument), mTextZoom(1.0), mFullZoom(1.0),
mPageSize(-1, -1), mPPScale(1.0f),
mViewportStyleOverflow(NS_STYLE_OVERFLOW_AUTO, NS_STYLE_OVERFLOW_AUTO),
mImageAnimationModePref(imgIContainer::kNormalAnimMode),
// Font sizes default to zero; they will be set in GetFontPreferences
mDefaultVariableFont("serif", NS_FONT_STYLE_NORMAL, NS_FONT_VARIANT_NORMAL,
NS_FONT_WEIGHT_NORMAL, NS_FONT_STRETCH_NORMAL, 0, 0),
mDefaultFixedFont("monospace", NS_FONT_STYLE_NORMAL,
NS_FONT_VARIANT_NORMAL, NS_FONT_WEIGHT_NORMAL,
NS_FONT_STRETCH_NORMAL, 0, 0),
mDefaultSerifFont("serif", NS_FONT_STYLE_NORMAL, NS_FONT_VARIANT_NORMAL,
NS_FONT_WEIGHT_NORMAL, NS_FONT_STRETCH_NORMAL, 0, 0),
mDefaultSansSerifFont("sans-serif", NS_FONT_STYLE_NORMAL,
NS_FONT_VARIANT_NORMAL, NS_FONT_WEIGHT_NORMAL,
NS_FONT_STRETCH_NORMAL, 0, 0),
mDefaultMonospaceFont("monospace", NS_FONT_STYLE_NORMAL,
NS_FONT_VARIANT_NORMAL, NS_FONT_WEIGHT_NORMAL,
NS_FONT_STRETCH_NORMAL, 0, 0),
mDefaultCursiveFont("cursive", NS_FONT_STYLE_NORMAL,
NS_FONT_VARIANT_NORMAL, NS_FONT_WEIGHT_NORMAL,
NS_FONT_STRETCH_NORMAL, 0, 0),
mDefaultFantasyFont("fantasy", NS_FONT_STYLE_NORMAL,
NS_FONT_VARIANT_NORMAL, NS_FONT_WEIGHT_NORMAL,
NS_FONT_STRETCH_NORMAL, 0, 0)
{
// NOTE! nsPresContext::operator new() zeroes out all members, so don't
// bother initializing members to 0.
mDoScaledTwips = PR_TRUE;
SetBackgroundImageDraw(PR_TRUE); // always draw the background
SetBackgroundColorDraw(PR_TRUE);
mBackgroundColor = NS_RGB(0xFF, 0xFF, 0xFF);
mUseDocumentColors = PR_TRUE;
mUseDocumentFonts = PR_TRUE;
// the minimum font-size is unconstrained by default
mLinkColor = NS_RGB(0x00, 0x00, 0xEE);
mActiveLinkColor = NS_RGB(0xEE, 0x00, 0x00);
mVisitedLinkColor = NS_RGB(0x55, 0x1A, 0x8B);
mUnderlineLinks = PR_TRUE;
mSendAfterPaintToContent = PR_FALSE;
mFocusTextColor = mDefaultColor;
mFocusBackgroundColor = mBackgroundColor;
mFocusRingWidth = 1;
if (aType == eContext_Galley) {
mMedium = nsGkAtoms::screen;
} else {
mMedium = nsGkAtoms::print;
mPaginated = PR_TRUE;
}
if (!IsDynamic()) {
mImageAnimationMode = imgIContainer::kDontAnimMode;
mNeverAnimate = PR_TRUE;
} else {
mImageAnimationMode = imgIContainer::kNormalAnimMode;
mNeverAnimate = PR_FALSE;
}
NS_ASSERTION(mDocument, "Null document");
mUserFontSet = nsnull;
mUserFontSetDirty = PR_TRUE;
}
nsPresContext::~nsPresContext()
{
NS_PRECONDITION(!mShell, "Presshell forgot to clear our mShell pointer");
SetShell(nsnull);
// Disconnect the refresh driver *after* the transition manager, which
// needs it.
if (mRefreshDriver && mRefreshDriver->PresContext() == this) {
mRefreshDriver->Disconnect();
}
if (mEventManager) {
// unclear if these are needed, but can't hurt
mEventManager->NotifyDestroyPresContext(this);
mEventManager->SetPresContext(nsnull);
NS_RELEASE(mEventManager);
}
if (mPrefChangedTimer)
{
mPrefChangedTimer->Cancel();
mPrefChangedTimer = nsnull;
}
// Unregister preference callbacks
nsContentUtils::UnregisterPrefCallback("font.",
nsPresContext::PrefChangedCallback,
this);
nsContentUtils::UnregisterPrefCallback("browser.display.",
nsPresContext::PrefChangedCallback,
this);
nsContentUtils::UnregisterPrefCallback("browser.underline_anchors",
nsPresContext::PrefChangedCallback,
this);
nsContentUtils::UnregisterPrefCallback("browser.anchor_color",
nsPresContext::PrefChangedCallback,
this);
nsContentUtils::UnregisterPrefCallback("browser.active_color",
nsPresContext::PrefChangedCallback,
this);
nsContentUtils::UnregisterPrefCallback("browser.visited_color",
nsPresContext::PrefChangedCallback,
this);
nsContentUtils::UnregisterPrefCallback("image.animation_mode",
nsPresContext::PrefChangedCallback,
this);
#ifdef IBMBIDI
nsContentUtils::UnregisterPrefCallback("bidi.", PrefChangedCallback, this);
#endif // IBMBIDI
nsContentUtils::UnregisterPrefCallback("dom.send_after_paint_to_content",
nsPresContext::PrefChangedCallback,
this);
nsContentUtils::UnregisterPrefCallback("gfx.font_rendering.",
nsPresContext::PrefChangedCallback,
this);
nsContentUtils::UnregisterPrefCallback("layout.css.dpi",
nsPresContext::PrefChangedCallback,
this);
nsContentUtils::UnregisterPrefCallback("layout.css.devPixelsPerPx",
nsPresContext::PrefChangedCallback,
this);
NS_IF_RELEASE(mDeviceContext);
NS_IF_RELEASE(mLookAndFeel);
NS_IF_RELEASE(mLanguage);
}
NS_IMPL_CYCLE_COLLECTION_CLASS(nsPresContext)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(nsPresContext)
NS_INTERFACE_MAP_ENTRY(nsISupports)
NS_INTERFACE_MAP_ENTRY(nsIObserver)
NS_INTERFACE_MAP_END
NS_IMPL_CYCLE_COLLECTING_ADDREF(nsPresContext)
NS_IMPL_CYCLE_COLLECTING_RELEASE(nsPresContext)
static PLDHashOperator
TraverseImageLoader(const void * aKey, nsRefPtr<nsImageLoader>& aData,
void* aClosure)
{
nsCycleCollectionTraversalCallback *cb =
static_cast<nsCycleCollectionTraversalCallback*>(aClosure);
cb->NoteXPCOMChild(aData);
return PL_DHASH_NEXT;
}
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(nsPresContext)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(mDocument);
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_RAWPTR(mDeviceContext); // worth bothering?
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_RAWPTR(mEventManager);
// NS_IMPL_CYCLE_COLLECTION_TRAVERSE_RAWPTR(mLookAndFeel); // a service
// NS_IMPL_CYCLE_COLLECTION_TRAVERSE_RAWPTR(mLanguage); // an atom
for (PRUint32 i = 0; i < IMAGE_LOAD_TYPE_COUNT; ++i)
tmp->mImageLoaders[i].Enumerate(TraverseImageLoader, &cb);
// NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(mTheme); // a service
// NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(mLangService); // a service
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(mPrintSettings);
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(mPrefChangedTimer);
if (tmp->mBidiUtils)
tmp->mBidiUtils->Traverse(cb);
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(nsPresContext)
NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(mDocument);
NS_RELEASE(tmp->mDeviceContext); // worth bothering?
if (tmp->mEventManager) {
// unclear if these are needed, but can't hurt
tmp->mEventManager->NotifyDestroyPresContext(tmp);
tmp->mEventManager->SetPresContext(nsnull);
NS_RELEASE(tmp->mEventManager);
}
// NS_RELEASE(tmp->mLookAndFeel); // a service
// NS_RELEASE(tmp->mLanguage); // an atom
// NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(mTheme); // a service
// NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(mLangService); // a service
NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(mPrintSettings);
if (tmp->mPrefChangedTimer)
{
tmp->mPrefChangedTimer->Cancel();
tmp->mPrefChangedTimer = nsnull;
}
if (tmp->mBidiUtils)
tmp->mBidiUtils->Unlink();
NS_IMPL_CYCLE_COLLECTION_UNLINK_END
#define MAKE_FONT_PREF_KEY(_pref, _s0, _s1) \
_pref.Assign(_s0); \
_pref.Append(_s1);
static const char* const kGenericFont[] = {
".variable.",
".fixed.",
".serif.",
".sans-serif.",
".monospace.",
".cursive.",
".fantasy."
};
// whether no native theme service exists;
// if this gets set to true, we'll stop asking for it.
static PRBool sNoTheme = PR_FALSE;
// Set to true when LookAndFeelChanged needs to be called. This is used
// because the look and feel is a service, so there's no need to notify it from
// more than one prescontext.
static PRBool sLookAndFeelChanged;
// Set to true when ThemeChanged needs to be called on mTheme. This is used
// because mTheme is a service, so there's no need to notify it from more than
// one prescontext.
static PRBool sThemeChanged;
void
nsPresContext::GetFontPreferences()
{
/* Fetch the font prefs to be used -- see bug 61883 for details.
Not all prefs are needed upfront. Some are fallback prefs intended
for the GFX font sub-system...
1) unit : assumed to be the same for all language groups -------------
font.size.unit = px | pt XXX could be folded in the size... bug 90440
2) attributes for generic fonts --------------------------------------
font.default = serif | sans-serif - fallback generic font
font.name.[generic].[langGroup] = current user' selected font on the pref dialog
font.name-list.[generic].[langGroup] = fontname1, fontname2, ... [factory pre-built list]
font.size.[generic].[langGroup] = integer - settable by the user
font.size-adjust.[generic].[langGroup] = "float" - settable by the user
font.minimum-size.[langGroup] = integer - settable by the user
*/
mDefaultVariableFont.size = CSSPixelsToAppUnits(16);
mDefaultFixedFont.size = CSSPixelsToAppUnits(13);
// the font prefs are based on langGroup, not actual language
nsCAutoString langGroup;
if (mLanguage && mLangService) {
nsresult rv;
nsIAtom *group = mLangService->GetLanguageGroup(mLanguage, &rv);
if (NS_SUCCEEDED(rv) && group) {
group->ToUTF8String(langGroup);
}
else {
langGroup.AssignLiteral("x-western"); // Assume x-western is safe...
}
}
else {
langGroup.AssignLiteral("x-western"); // Assume x-western is safe...
}
nsCAutoString pref;
// get the current applicable font-size unit
enum {eUnit_unknown = -1, eUnit_px, eUnit_pt};
PRInt32 unit = eUnit_px;
nsAdoptingCString cvalue =
nsContentUtils::GetCharPref("font.size.unit");
if (!cvalue.IsEmpty()) {
if (cvalue.Equals("px")) {
unit = eUnit_px;
}
else if (cvalue.Equals("pt")) {
unit = eUnit_pt;
}
else {
NS_WARNING("unexpected font-size unit -- expected: 'px' or 'pt'");
unit = eUnit_unknown;
}
}
// get font.minimum-size.[langGroup]
pref.Assign("font.minimum-size.");
pref.Append(langGroup);
PRInt32 size = nsContentUtils::GetIntPref(pref.get());
if (unit == eUnit_px) {
mMinimumFontSize = CSSPixelsToAppUnits(size);
}
else if (unit == eUnit_pt) {
mMinimumFontSize = CSSPointsToAppUnits(size);
}
// get attributes specific to each generic font
nsCAutoString generic_dot_langGroup;
for (PRInt32 eType = eDefaultFont_Variable; eType < eDefaultFont_COUNT; ++eType) {
generic_dot_langGroup.Assign(kGenericFont[eType]);
generic_dot_langGroup.Append(langGroup);
nsFont* font;
switch (eType) {
case eDefaultFont_Variable: font = &mDefaultVariableFont; break;
case eDefaultFont_Fixed: font = &mDefaultFixedFont; break;
case eDefaultFont_Serif: font = &mDefaultSerifFont; break;
case eDefaultFont_SansSerif: font = &mDefaultSansSerifFont; break;
case eDefaultFont_Monospace: font = &mDefaultMonospaceFont; break;
case eDefaultFont_Cursive: font = &mDefaultCursiveFont; break;
case eDefaultFont_Fantasy: font = &mDefaultFantasyFont; break;
}
// set the default variable font (the other fonts are seen as 'generic' fonts
// in GFX and will be queried there when hunting for alternative fonts)
if (eType == eDefaultFont_Variable) {
MAKE_FONT_PREF_KEY(pref, "font.name", generic_dot_langGroup);
nsAdoptingString value =
nsContentUtils::GetStringPref(pref.get());
if (!value.IsEmpty()) {
font->name.Assign(value);
}
else {
MAKE_FONT_PREF_KEY(pref, "font.default.", langGroup);
value = nsContentUtils::GetStringPref(pref.get());
if (!value.IsEmpty()) {
mDefaultVariableFont.name.Assign(value);
}
}
}
else {
if (eType == eDefaultFont_Monospace) {
// This takes care of the confusion whereby people often expect "monospace"
// to have the same default font-size as "-moz-fixed" (this tentative
// size may be overwritten with the specific value for "monospace" when
// "font.size.monospace.[langGroup]" is read -- see below)
font->size = mDefaultFixedFont.size;
}
else if (eType != eDefaultFont_Fixed) {
// all the other generic fonts are initialized with the size of the
// variable font, but their specific size can supersede later -- see below
font->size = mDefaultVariableFont.size;
}
}
// Bug 84398: for spec purists, a different font-size only applies to the
// .variable. and .fixed. fonts and the other fonts should get |font-size-adjust|.
// The problem is that only GfxWin has the support for |font-size-adjust|. So for
// parity, we enable the ability to set a different font-size on all platforms.
// get font.size.[generic].[langGroup]
// size=0 means 'Auto', i.e., generic fonts retain the size of the variable font
MAKE_FONT_PREF_KEY(pref, "font.size", generic_dot_langGroup);
size = nsContentUtils::GetIntPref(pref.get());
if (size > 0) {
if (unit == eUnit_px) {
font->size = CSSPixelsToAppUnits(size);
}
else if (unit == eUnit_pt) {
font->size = CSSPointsToAppUnits(size);
}
}
// get font.size-adjust.[generic].[langGroup]
// XXX only applicable on GFX ports that handle |font-size-adjust|
MAKE_FONT_PREF_KEY(pref, "font.size-adjust", generic_dot_langGroup);
cvalue = nsContentUtils::GetCharPref(pref.get());
if (!cvalue.IsEmpty()) {
font->sizeAdjust = (float)atof(cvalue.get());
}
#ifdef DEBUG_rbs
printf("%s Family-list:%s size:%d sizeAdjust:%.2f\n",
generic_dot_langGroup.get(),
NS_ConvertUTF16toUTF8(font->name).get(), font->size,
font->sizeAdjust);
#endif
}
}
void
nsPresContext::GetDocumentColorPreferences()
{
PRInt32 useAccessibilityTheme = 0;
PRBool usePrefColors = PR_TRUE;
nsCOMPtr<nsIDocShellTreeItem> docShell(do_QueryReferent(mContainer));
if (docShell) {
PRInt32 docShellType;
docShell->GetItemType(&docShellType);
if (nsIDocShellTreeItem::typeChrome == docShellType) {
usePrefColors = PR_FALSE;
}
else {
mLookAndFeel->GetMetric(nsILookAndFeel::eMetric_UseAccessibilityTheme, useAccessibilityTheme);
usePrefColors = !useAccessibilityTheme;
}
}
if (usePrefColors) {
usePrefColors =
!nsContentUtils::GetBoolPref("browser.display.use_system_colors",
PR_FALSE);
}
if (usePrefColors) {
nsAdoptingCString colorStr =
nsContentUtils::GetCharPref("browser.display.foreground_color");
if (!colorStr.IsEmpty()) {
mDefaultColor = MakeColorPref(colorStr);
}
colorStr =
nsContentUtils::GetCharPref("browser.display.background_color");
if (!colorStr.IsEmpty()) {
mBackgroundColor = MakeColorPref(colorStr);
}
}
else {
mDefaultColor = NS_RGB(0x00, 0x00, 0x00);
mBackgroundColor = NS_RGB(0xFF, 0xFF, 0xFF);
mLookAndFeel->GetColor(nsILookAndFeel::eColor_WindowForeground,
mDefaultColor);
mLookAndFeel->GetColor(nsILookAndFeel::eColor_WindowBackground,
mBackgroundColor);
}
// Wherever we got the default background color from, ensure it is
// opaque.
mBackgroundColor = NS_ComposeColors(NS_RGB(0xFF, 0xFF, 0xFF),
mBackgroundColor);
mUseDocumentColors = !useAccessibilityTheme &&
nsContentUtils::GetBoolPref("browser.display.use_document_colors",
mUseDocumentColors);
}
void
nsPresContext::GetUserPreferences()
{
if (!GetPresShell()) {
// No presshell means nothing to do here. We'll do this when we
// get a presshell.
return;
}
mFontScaler =
nsContentUtils::GetIntPref("browser.display.base_font_scaler",
mFontScaler);
mAutoQualityMinFontSizePixelsPref =
nsContentUtils::GetIntPref("browser.display.auto_quality_min_font_size");
// * document colors
GetDocumentColorPreferences();
mSendAfterPaintToContent =
nsContentUtils::GetBoolPref("dom.send_after_paint_to_content",
mSendAfterPaintToContent);
// * link colors
mUnderlineLinks =
nsContentUtils::GetBoolPref("browser.underline_anchors", mUnderlineLinks);
nsAdoptingCString colorStr =
nsContentUtils::GetCharPref("browser.anchor_color");
if (!colorStr.IsEmpty()) {
mLinkColor = MakeColorPref(colorStr);
}
colorStr =
nsContentUtils::GetCharPref("browser.active_color");
if (!colorStr.IsEmpty()) {
mActiveLinkColor = MakeColorPref(colorStr);
}
colorStr = nsContentUtils::GetCharPref("browser.visited_color");
if (!colorStr.IsEmpty()) {
mVisitedLinkColor = MakeColorPref(colorStr);
}
mUseFocusColors =
nsContentUtils::GetBoolPref("browser.display.use_focus_colors",
mUseFocusColors);
mFocusTextColor = mDefaultColor;
mFocusBackgroundColor = mBackgroundColor;
colorStr = nsContentUtils::GetCharPref("browser.display.focus_text_color");
if (!colorStr.IsEmpty()) {
mFocusTextColor = MakeColorPref(colorStr);
}
colorStr =
nsContentUtils::GetCharPref("browser.display.focus_background_color");
if (!colorStr.IsEmpty()) {
mFocusBackgroundColor = MakeColorPref(colorStr);
}
mFocusRingWidth =
nsContentUtils::GetIntPref("browser.display.focus_ring_width",
mFocusRingWidth);
mFocusRingOnAnything =
nsContentUtils::GetBoolPref("browser.display.focus_ring_on_anything",
mFocusRingOnAnything);
mFocusRingStyle =
nsContentUtils::GetIntPref("browser.display.focus_ring_style",
mFocusRingStyle);
// * use fonts?
mUseDocumentFonts =
nsContentUtils::GetIntPref("browser.display.use_document_fonts") != 0;
// * replace backslashes with Yen signs? (bug 245770)
mEnableJapaneseTransform =
nsContentUtils::GetBoolPref("layout.enable_japanese_specific_transform");
mPrefScrollbarSide =
nsContentUtils::GetIntPref("layout.scrollbar.side");
GetFontPreferences();
// * image animation
const nsAdoptingCString& animatePref =
nsContentUtils::GetCharPref("image.animation_mode");
if (animatePref.Equals("normal"))
mImageAnimationModePref = imgIContainer::kNormalAnimMode;
else if (animatePref.Equals("none"))
mImageAnimationModePref = imgIContainer::kDontAnimMode;
else if (animatePref.Equals("once"))
mImageAnimationModePref = imgIContainer::kLoopOnceAnimMode;
else // dynamic change to invalid value should act like it does initially
mImageAnimationModePref = imgIContainer::kNormalAnimMode;
PRUint32 bidiOptions = GetBidi();
PRInt32 prefInt =
nsContentUtils::GetIntPref(IBMBIDI_TEXTDIRECTION_STR,
GET_BIDI_OPTION_DIRECTION(bidiOptions));
SET_BIDI_OPTION_DIRECTION(bidiOptions, prefInt);
mPrefBidiDirection = prefInt;
prefInt =
nsContentUtils::GetIntPref(IBMBIDI_TEXTTYPE_STR,
GET_BIDI_OPTION_TEXTTYPE(bidiOptions));
SET_BIDI_OPTION_TEXTTYPE(bidiOptions, prefInt);
prefInt =
nsContentUtils::GetIntPref(IBMBIDI_NUMERAL_STR,
GET_BIDI_OPTION_NUMERAL(bidiOptions));
SET_BIDI_OPTION_NUMERAL(bidiOptions, prefInt);
prefInt =
nsContentUtils::GetIntPref(IBMBIDI_SUPPORTMODE_STR,
GET_BIDI_OPTION_SUPPORT(bidiOptions));
SET_BIDI_OPTION_SUPPORT(bidiOptions, prefInt);
prefInt =
nsContentUtils::GetIntPref(IBMBIDI_CHARSET_STR,
GET_BIDI_OPTION_CHARACTERSET(bidiOptions));
SET_BIDI_OPTION_CHARACTERSET(bidiOptions, prefInt);
// We don't need to force reflow: either we are initializing a new
// prescontext or we are being called from UpdateAfterPreferencesChanged()
// which triggers a reflow anyway.
SetBidi(bidiOptions, PR_FALSE);
}
void
nsPresContext::PreferenceChanged(const char* aPrefName)
{
nsDependentCString prefName(aPrefName);
if (prefName.EqualsLiteral("layout.css.dpi") ||
prefName.EqualsLiteral("layout.css.devPixelsPerPx")) {
PRInt32 oldAppUnitsPerDevPixel = AppUnitsPerDevPixel();
if (mDeviceContext->CheckDPIChange() && mShell) {
mDeviceContext->FlushFontCache();
// Re-fetch the view manager's window dimensions in case there's a deferred
// resize which hasn't affected our mVisibleArea yet
nscoord oldWidthAppUnits, oldHeightAppUnits;
nsIViewManager* vm = mShell->GetViewManager();
vm->GetWindowDimensions(&oldWidthAppUnits, &oldHeightAppUnits);
float oldWidthDevPixels = oldWidthAppUnits/oldAppUnitsPerDevPixel;
float oldHeightDevPixels = oldHeightAppUnits/oldAppUnitsPerDevPixel;
nscoord width = NSToCoordRound(oldWidthDevPixels*AppUnitsPerDevPixel());
nscoord height = NSToCoordRound(oldHeightDevPixels*AppUnitsPerDevPixel());
vm->SetWindowDimensions(width, height);
MediaFeatureValuesChanged(PR_TRUE);
RebuildAllStyleData(NS_STYLE_HINT_REFLOW);
}
return;
}
if (StringBeginsWith(prefName, NS_LITERAL_CSTRING("font."))) {
// Changes to font family preferences don't change anything in the
// computed style data, so the style system won't generate a reflow
// hint for us. We need to do that manually.
// FIXME We could probably also handle changes to
// browser.display.auto_quality_min_font_size here, but that
// probably also requires clearing the text run cache, so don't
// bother (yet, anyway).
mPrefChangePendingNeedsReflow = PR_TRUE;
}
if (StringBeginsWith(prefName, NS_LITERAL_CSTRING("bidi."))) {
// Changes to bidi prefs need to trigger a reflow (see bug 443629)
mPrefChangePendingNeedsReflow = PR_TRUE;
// Changes to bidi.numeral also needs to empty the text run cache.
// This is handled in gfxTextRunWordCache.cpp.
}
if (StringBeginsWith(prefName, NS_LITERAL_CSTRING("gfx.font_rendering."))) {
// Changes to font_rendering prefs need to trigger a reflow
mPrefChangePendingNeedsReflow = PR_TRUE;
}
// we use a zero-delay timer to coalesce multiple pref updates
if (!mPrefChangedTimer)
{
mPrefChangedTimer = do_CreateInstance("@mozilla.org/timer;1");
if (!mPrefChangedTimer)
return;
mPrefChangedTimer->InitWithFuncCallback(nsPresContext::PrefChangedUpdateTimerCallback, (void*)this, 0, nsITimer::TYPE_ONE_SHOT);
}
}
void
nsPresContext::UpdateAfterPreferencesChanged()
{
mPrefChangedTimer = nsnull;
nsCOMPtr<nsIDocShellTreeItem> docShell(do_QueryReferent(mContainer));
if (docShell) {
PRInt32 docShellType;
docShell->GetItemType(&docShellType);
if (nsIDocShellTreeItem::typeChrome == docShellType)
return;
}
// Initialize our state from the user preferences
GetUserPreferences();
// update the presShell: tell it to set the preference style rules up
if (mShell) {
mShell->SetPreferenceStyleRules(PR_TRUE);
}
mDeviceContext->FlushFontCache();
nsChangeHint hint = nsChangeHint(0);
if (mPrefChangePendingNeedsReflow) {
NS_UpdateHint(hint, NS_STYLE_HINT_REFLOW);
}
RebuildAllStyleData(hint);
}
nsresult
nsPresContext::Init(nsIDeviceContext* aDeviceContext)
{
NS_ASSERTION(!mInitialized, "attempt to reinit pres context");
NS_ENSURE_ARG(aDeviceContext);
mDeviceContext = aDeviceContext;
NS_ADDREF(mDeviceContext);
if (mDeviceContext->SetPixelScale(mFullZoom))
mDeviceContext->FlushFontCache();
mCurAppUnitsPerDevPixel = AppUnitsPerDevPixel();
for (PRUint32 i = 0; i < IMAGE_LOAD_TYPE_COUNT; ++i)
if (!mImageLoaders[i].Init())
return NS_ERROR_OUT_OF_MEMORY;
// Get the look and feel service here; default colors will be initialized
// from calling GetUserPreferences() when we get a presshell.
nsresult rv = CallGetService(kLookAndFeelCID, &mLookAndFeel);
if (NS_FAILED(rv)) {
NS_ERROR("LookAndFeel service must be implemented for this toolkit");
return rv;
}
mEventManager = new nsEventStateManager();
if (!mEventManager)
return NS_ERROR_OUT_OF_MEMORY;
NS_ADDREF(mEventManager);
mTransitionManager = new nsTransitionManager(this);
if (!mTransitionManager)
return NS_ERROR_OUT_OF_MEMORY;
if (mDocument->GetDisplayDocument()) {
NS_ASSERTION(mDocument->GetDisplayDocument()->GetShell() &&
mDocument->GetDisplayDocument()->GetShell()->GetPresContext(),
"Why are we being initialized?");
mRefreshDriver = mDocument->GetDisplayDocument()->GetShell()->
GetPresContext()->RefreshDriver();
} else {
nsIDocument* parent = mDocument->GetParentDocument();
// Unfortunately, sometimes |parent| here has no presshell because
// printing screws up things. Assert that in other cases it does,
// but whenever the shell is null just fall back on using our own
// refresh driver.
NS_ASSERTION(!parent || mDocument->IsStaticDocument() || parent->GetShell(),
"How did we end up with a presshell if our parent doesn't "
"have one?");
if (parent && parent->GetShell()) {
NS_ASSERTION(parent->GetShell()->GetPresContext(),
"How did we get a presshell?");
// We don't have our container set yet at this point
nsCOMPtr<nsISupports> ourContainer = mDocument->GetContainer();
nsCOMPtr<nsIDocShellTreeItem> ourItem = do_QueryInterface(ourContainer);
if (ourItem) {
nsCOMPtr<nsIDocShellTreeItem> parentItem;
ourItem->GetSameTypeParent(getter_AddRefs(parentItem));
if (parentItem) {
mRefreshDriver = parent->GetShell()->GetPresContext()->RefreshDriver();
}
}
}
if (!mRefreshDriver) {
mRefreshDriver = new nsRefreshDriver(this);
if (!mRefreshDriver)
return NS_ERROR_OUT_OF_MEMORY;
}
}
mLangService = do_GetService(NS_LANGUAGEATOMSERVICE_CONTRACTID);
// Register callbacks so we're notified when the preferences change
nsContentUtils::RegisterPrefCallback("font.",
nsPresContext::PrefChangedCallback,
this);
nsContentUtils::RegisterPrefCallback("browser.display.",
nsPresContext::PrefChangedCallback,
this);
nsContentUtils::RegisterPrefCallback("browser.underline_anchors",
nsPresContext::PrefChangedCallback,
this);
nsContentUtils::RegisterPrefCallback("browser.anchor_color",
nsPresContext::PrefChangedCallback,
this);
nsContentUtils::RegisterPrefCallback("browser.active_color",
nsPresContext::PrefChangedCallback,
this);
nsContentUtils::RegisterPrefCallback("browser.visited_color",
nsPresContext::PrefChangedCallback,
this);
nsContentUtils::RegisterPrefCallback("image.animation_mode",
nsPresContext::PrefChangedCallback,
this);
#ifdef IBMBIDI
nsContentUtils::RegisterPrefCallback("bidi.", PrefChangedCallback,
this);
#endif
nsContentUtils::RegisterPrefCallback("dom.send_after_paint_to_content",
nsPresContext::PrefChangedCallback,
this);
nsContentUtils::RegisterPrefCallback("gfx.font_rendering.", PrefChangedCallback,
this);
nsContentUtils::RegisterPrefCallback("layout.css.dpi",
nsPresContext::PrefChangedCallback,
this);
nsContentUtils::RegisterPrefCallback("layout.css.devPixelsPerPx",
nsPresContext::PrefChangedCallback,
this);
rv = mEventManager->Init();
NS_ENSURE_SUCCESS(rv, rv);
mEventManager->SetPresContext(this);
#ifdef DEBUG
mInitialized = PR_TRUE;
#endif
mBorderWidthTable[NS_STYLE_BORDER_WIDTH_THIN] = CSSPixelsToAppUnits(1);
mBorderWidthTable[NS_STYLE_BORDER_WIDTH_MEDIUM] = CSSPixelsToAppUnits(3);
mBorderWidthTable[NS_STYLE_BORDER_WIDTH_THICK] = CSSPixelsToAppUnits(5);
return NS_OK;
}
// Note: We don't hold a reference on the shell; it has a reference to
// us
void
nsPresContext::SetShell(nsIPresShell* aShell)
{
if (mUserFontSet) {
// Clear out user font set if we have one
mUserFontSet->Destroy();
NS_RELEASE(mUserFontSet);
}
if (mShell) {
// Remove ourselves as the charset observer from the shell's doc, because
// this shell may be going away for good.
nsIDocument *doc = mShell->GetDocument();
if (doc) {
doc->RemoveCharSetObserver(this);
}
}
mShell = aShell;
if (mShell) {
nsIDocument *doc = mShell->GetDocument();
NS_ASSERTION(doc, "expect document here");
if (doc) {
// Have to update PresContext's mDocument before calling any other methods.
mDocument = doc;
}
// Initialize our state from the user preferences, now that we
// have a presshell, and hence a document.
GetUserPreferences();
if (doc) {
nsIURI *docURI = doc->GetDocumentURI();
if (IsDynamic() && docURI) {
PRBool isChrome = PR_FALSE;
PRBool isRes = PR_FALSE;
docURI->SchemeIs("chrome", &isChrome);
docURI->SchemeIs("resource", &isRes);
if (!isChrome && !isRes)
mImageAnimationMode = mImageAnimationModePref;
else
mImageAnimationMode = imgIContainer::kNormalAnimMode;
}
if (mLangService) {
doc->AddCharSetObserver(this);
UpdateCharSet(doc->GetDocumentCharacterSet());
}
}
} else {
// Destroy image loaders now that the presshell is going away.
// This is important since imageloaders can have pointers to frames and
// we don't want those pointers to outlive the destruction of the frame
// arena.
for (PRUint32 i = 0; i < IMAGE_LOAD_TYPE_COUNT; ++i) {
mImageLoaders[i].Enumerate(destroy_loads, nsnull);
mImageLoaders[i].Clear();
}
if (mTransitionManager) {
mTransitionManager->Disconnect();
mTransitionManager = nsnull;
}
}
}
void
nsPresContext::UpdateCharSet(const nsAFlatCString& aCharSet)
{
if (mLangService) {
NS_IF_RELEASE(mLanguage);
mLanguage = mLangService->LookupCharSet(aCharSet.get()).get(); // addrefs
// this will be a language group (or script) code rather than a true language code
// bug 39570: moved from nsLanguageAtomService::LookupCharSet()
#if !defined(XP_BEOS)
if (mLanguage == nsGkAtoms::Unicode) {
NS_RELEASE(mLanguage);
NS_IF_ADDREF(mLanguage = mLangService->GetLocaleLanguage());
}
#endif
GetFontPreferences();
}
#ifdef IBMBIDI
//ahmed
switch (GET_BIDI_OPTION_TEXTTYPE(GetBidi())) {
case IBMBIDI_TEXTTYPE_LOGICAL:
SetVisualMode(PR_FALSE);
break;
case IBMBIDI_TEXTTYPE_VISUAL:
SetVisualMode(PR_TRUE);
break;
case IBMBIDI_TEXTTYPE_CHARSET:
default:
SetVisualMode(IsVisualCharset(aCharSet));
}
#endif // IBMBIDI
}
NS_IMETHODIMP
nsPresContext::Observe(nsISupports* aSubject,
const char* aTopic,
const PRUnichar* aData)
{
if (!nsCRT::strcmp(aTopic, "charset")) {
UpdateCharSet(NS_LossyConvertUTF16toASCII(aData));
mDeviceContext->FlushFontCache();
RebuildAllStyleData(NS_STYLE_HINT_REFLOW);
return NS_OK;
}
NS_WARNING("unrecognized topic in nsPresContext::Observe");
return NS_ERROR_FAILURE;
}
static nsPresContext*
GetParentPresContext(nsPresContext* aPresContext)
{
nsIPresShell* shell = aPresContext->GetPresShell();
if (shell) {
nsIFrame* rootFrame = shell->FrameManager()->GetRootFrame();
if (rootFrame) {
nsIFrame* f = nsLayoutUtils::GetCrossDocParentFrame(rootFrame);
if (f)
return f->PresContext();
}
}
return nsnull;
}
// We may want to replace this with something faster, maybe caching the root prescontext
nsRootPresContext*
nsPresContext::GetRootPresContext()
{
nsPresContext* pc = this;
for (;;) {
nsPresContext* parent = GetParentPresContext(pc);
if (!parent)
break;
pc = parent;
}
return pc->IsRoot() ? static_cast<nsRootPresContext*>(pc) : nsnull;
}
void
nsPresContext::CompatibilityModeChanged()
{
if (!mShell)
return;
// enable/disable the QuirkSheet
mShell->StyleSet()->
EnableQuirkStyleSheet(CompatibilityMode() == eCompatibility_NavQuirks);
}
// Helper function for setting Anim Mode on image
static void SetImgAnimModeOnImgReq(imgIRequest* aImgReq, PRUint16 aMode)
{
if (aImgReq) {
nsCOMPtr<imgIContainer> imgCon;
aImgReq->GetImage(getter_AddRefs(imgCon));
if (imgCon) {
imgCon->SetAnimationMode(aMode);
}
}
}
// Enumeration call back for HashTable
static PLDHashOperator
set_animation_mode(const void * aKey, nsRefPtr<nsImageLoader>& aData, void* closure)
{
for (nsImageLoader *loader = aData; loader;
loader = loader->GetNextLoader()) {
imgIRequest* imgReq = loader->GetRequest();
SetImgAnimModeOnImgReq(imgReq, (PRUint16)NS_PTR_TO_INT32(closure));
}
return PL_DHASH_NEXT;
}
// IMPORTANT: Assumption is that all images for a Presentation
// have the same Animation Mode (pavlov said this was OK)
//
// Walks content and set the animation mode
// this is a way to turn on/off image animations
void nsPresContext::SetImgAnimations(nsIContent *aParent, PRUint16 aMode)
{
nsCOMPtr<nsIImageLoadingContent> imgContent(do_QueryInterface(aParent));
if (imgContent) {
nsCOMPtr<imgIRequest> imgReq;
imgContent->GetRequest(nsIImageLoadingContent::CURRENT_REQUEST,
getter_AddRefs(imgReq));
SetImgAnimModeOnImgReq(imgReq, aMode);
}
PRUint32 count = aParent->GetChildCount();
for (PRUint32 i = 0; i < count; ++i) {
SetImgAnimations(aParent->GetChildAt(i), aMode);
}
}
#ifdef MOZ_SMIL
void
nsPresContext::SetSMILAnimations(nsIDocument *aDoc, PRUint16 aNewMode,
PRUint16 aOldMode)
{
if (aDoc->HasAnimationController()) {
nsSMILAnimationController* controller = aDoc->GetAnimationController();
switch (aNewMode)
{
case imgIContainer::kNormalAnimMode:
case imgIContainer::kLoopOnceAnimMode:
if (aOldMode == imgIContainer::kDontAnimMode)
controller->Resume(nsSMILTimeContainer::PAUSE_USERPREF);
break;
case imgIContainer::kDontAnimMode:
if (aOldMode != imgIContainer::kDontAnimMode)
controller->Pause(nsSMILTimeContainer::PAUSE_USERPREF);
break;
}
}
}
#endif // MOZ_SMIL
void
nsPresContext::SetImageAnimationModeInternal(PRUint16 aMode)
{
NS_ASSERTION(aMode == imgIContainer::kNormalAnimMode ||
aMode == imgIContainer::kDontAnimMode ||
aMode == imgIContainer::kLoopOnceAnimMode, "Wrong Animation Mode is being set!");
// Image animation mode cannot be changed when rendering to a printer.
if (!IsDynamic())
return;
// Set the mode on the image loaders.
for (PRUint32 i = 0; i < IMAGE_LOAD_TYPE_COUNT; ++i)
mImageLoaders[i].Enumerate(set_animation_mode, NS_INT32_TO_PTR(aMode));
// Now walk the content tree and set the animation mode
// on all the images.
if (mShell != nsnull) {
nsIDocument *doc = mShell->GetDocument();
if (doc) {
Element *rootElement = doc->GetRootElement();
if (rootElement) {
SetImgAnimations(rootElement, aMode);
}
#ifdef MOZ_SMIL
SetSMILAnimations(doc, aMode, mImageAnimationMode);
#endif // MOZ_SMIL
}
}
mImageAnimationMode = aMode;
}
void
nsPresContext::SetImageAnimationModeExternal(PRUint16 aMode)
{
SetImageAnimationModeInternal(aMode);
}
already_AddRefed<nsIFontMetrics>
nsPresContext::GetMetricsFor(const nsFont& aFont, PRBool aUseUserFontSet)
{
nsIFontMetrics* metrics = nsnull;
mDeviceContext->GetMetricsFor(aFont, mLanguage,
aUseUserFontSet ? GetUserFontSet() : nsnull,
metrics);
return metrics;
}
const nsFont*
nsPresContext::GetDefaultFont(PRUint8 aFontID) const
{
const nsFont *font;
switch (aFontID) {
// Special (our default variable width font and fixed width font)
case kPresContext_DefaultVariableFont_ID:
font = &mDefaultVariableFont;
break;
case kPresContext_DefaultFixedFont_ID:
font = &mDefaultFixedFont;
break;
// CSS
case kGenericFont_serif:
font = &mDefaultSerifFont;
break;
case kGenericFont_sans_serif:
font = &mDefaultSansSerifFont;
break;
case kGenericFont_monospace:
font = &mDefaultMonospaceFont;
break;
case kGenericFont_cursive:
font = &mDefaultCursiveFont;
break;
case kGenericFont_fantasy:
font = &mDefaultFantasyFont;
break;
default:
font = nsnull;
NS_ERROR("invalid arg");
break;
}
return font;
}
void
nsPresContext::SetFullZoom(float aZoom)
{
if (!mShell || mFullZoom == aZoom) {
return;
}
// Re-fetch the view manager's window dimensions in case there's a deferred
// resize which hasn't affected our mVisibleArea yet
nscoord oldWidthAppUnits, oldHeightAppUnits;
mShell->GetViewManager()->GetWindowDimensions(&oldWidthAppUnits, &oldHeightAppUnits);
float oldWidthDevPixels = oldWidthAppUnits / float(mCurAppUnitsPerDevPixel);
float oldHeightDevPixels = oldHeightAppUnits / float(mCurAppUnitsPerDevPixel);
if (mDeviceContext->SetPixelScale(aZoom)) {
mDeviceContext->FlushFontCache();
}
NS_ASSERTION(!mSupressResizeReflow, "two zooms happening at the same time? impossible!");
mSupressResizeReflow = PR_TRUE;
mFullZoom = aZoom;
mShell->GetViewManager()->
SetWindowDimensions(NSToCoordRound(oldWidthDevPixels * AppUnitsPerDevPixel()),
NSToCoordRound(oldHeightDevPixels * AppUnitsPerDevPixel()));
if (HasCachedStyleData()) {
MediaFeatureValuesChanged(PR_TRUE);
RebuildAllStyleData(NS_STYLE_HINT_REFLOW);
}
mSupressResizeReflow = PR_FALSE;
mCurAppUnitsPerDevPixel = AppUnitsPerDevPixel();
}
void
nsPresContext::SetImageLoaders(nsIFrame* aTargetFrame,
ImageLoadType aType,
nsImageLoader* aImageLoaders)
{
NS_ASSERTION(mShell || !aImageLoaders,
"Shouldn't add new image loader after the shell is gone");
nsRefPtr<nsImageLoader> oldLoaders;
mImageLoaders[aType].Get(aTargetFrame, getter_AddRefs(oldLoaders));
if (aImageLoaders) {
mImageLoaders[aType].Put(aTargetFrame, aImageLoaders);
} else if (oldLoaders) {
mImageLoaders[aType].Remove(aTargetFrame);
}
if (oldLoaders)
oldLoaders->Destroy();
}
void
nsPresContext::SetupBackgroundImageLoaders(nsIFrame* aFrame,
const nsStyleBackground* aStyleBackground)
{
nsRefPtr<nsImageLoader> loaders;
NS_FOR_VISIBLE_BACKGROUND_LAYERS_BACK_TO_FRONT(i, aStyleBackground) {
if (aStyleBackground->mLayers[i].mImage.GetType() == eStyleImageType_Image) {
PRUint32 actions = nsImageLoader::ACTION_REDRAW_ON_DECODE;
imgIRequest *image = aStyleBackground->mLayers[i].mImage.GetImageData();
loaders = nsImageLoader::Create(aFrame, image, actions, loaders);
}
}
SetImageLoaders(aFrame, BACKGROUND_IMAGE, loaders);
}
void
nsPresContext::SetupBorderImageLoaders(nsIFrame* aFrame,
const nsStyleBorder* aStyleBorder)
{
PRUint32 actions = nsImageLoader::ACTION_REDRAW_ON_LOAD;
if (aStyleBorder->ImageBorderDiffers())
actions |= nsImageLoader::ACTION_REFLOW_ON_LOAD;
nsRefPtr<nsImageLoader> loader =
nsImageLoader::Create(aFrame, aStyleBorder->GetBorderImage(),
actions, nsnull);
SetImageLoaders(aFrame, BORDER_IMAGE, loader);
}
void
nsPresContext::StopImagesFor(nsIFrame* aTargetFrame)
{
for (PRUint32 i = 0; i < IMAGE_LOAD_TYPE_COUNT; ++i)
SetImageLoaders(aTargetFrame, ImageLoadType(i), nsnull);
}
void
nsPresContext::SetContainer(nsISupports* aHandler)
{
mContainer = do_GetWeakReference(aHandler);
InvalidateIsChromeCache();
if (mContainer) {
GetDocumentColorPreferences();
}
}
already_AddRefed<nsISupports>
nsPresContext::GetContainerInternal() const
{
nsISupports *result = nsnull;
if (mContainer)
CallQueryReferent(mContainer.get(), &result);
return result;
}
already_AddRefed<nsISupports>
nsPresContext::GetContainerExternal() const
{
return GetContainerInternal();
}
#ifdef IBMBIDI
void
nsPresContext::SetBidiEnabled() const
{
if (mShell) {
nsIDocument *doc = mShell->GetDocument();
if (doc) {
doc->SetBidiEnabled();
}
}
}
nsBidiPresUtils*
nsPresContext::GetBidiUtils()
{
if (!mBidiUtils)
mBidiUtils = new nsBidiPresUtils;
return mBidiUtils;
}
void
nsPresContext::SetBidi(PRUint32 aSource, PRBool aForceRestyle)
{
// Don't do all this stuff unless the options have changed.
if (aSource == GetBidi()) {
return;
}
NS_ASSERTION(!(aForceRestyle && (GetBidi() == 0)),
"ForceReflow on new prescontext");
Document()->SetBidiOptions(aSource);
if (IBMBIDI_TEXTDIRECTION_RTL == GET_BIDI_OPTION_DIRECTION(aSource)
|| IBMBIDI_NUMERAL_HINDI == GET_BIDI_OPTION_NUMERAL(aSource)) {
SetBidiEnabled();
}
if (IBMBIDI_TEXTTYPE_VISUAL == GET_BIDI_OPTION_TEXTTYPE(aSource)) {
SetVisualMode(PR_TRUE);
}
else if (IBMBIDI_TEXTTYPE_LOGICAL == GET_BIDI_OPTION_TEXTTYPE(aSource)) {
SetVisualMode(PR_FALSE);
}
else {
nsIDocument* doc = mShell->GetDocument();
if (doc) {
SetVisualMode(IsVisualCharset(doc->GetDocumentCharacterSet()));
}
}
if (aForceRestyle && mShell) {
// Reconstruct the root document element's frame and its children,
// because we need to trigger frame reconstruction for direction change.
RebuildUserFontSet();
mShell->ReconstructFrames();
}
}
PRUint32
nsPresContext::GetBidi() const
{
return Document()->GetBidiOptions();
}
PRUint32
nsPresContext::GetBidiMemoryUsed()
{
if (!mBidiUtils)
return 0;
return mBidiUtils->EstimateMemoryUsed();
}
#endif //IBMBIDI
PRBool
nsPresContext::IsTopLevelWindowInactive()
{
nsCOMPtr<nsIDocShellTreeItem> treeItem(do_QueryReferent(mContainer));
if (!treeItem)
return PR_FALSE;
nsCOMPtr<nsIDocShellTreeItem> rootItem;
treeItem->GetRootTreeItem(getter_AddRefs(rootItem));
nsCOMPtr<nsPIDOMWindow> domWindow(do_GetInterface(rootItem));
return domWindow && !domWindow->IsActive();
}
nsITheme*
nsPresContext::GetTheme()
{
if (!sNoTheme && !mTheme) {
mTheme = do_GetService("@mozilla.org/chrome/chrome-native-theme;1");
if (!mTheme)
sNoTheme = PR_TRUE;
}
return mTheme;
}
void
nsPresContext::ThemeChanged()
{
if (!mPendingThemeChanged) {
sLookAndFeelChanged = PR_TRUE;
sThemeChanged = PR_TRUE;
nsCOMPtr<nsIRunnable> ev =
NS_NewRunnableMethod(this, &nsPresContext::ThemeChangedInternal);
if (NS_SUCCEEDED(NS_DispatchToCurrentThread(ev))) {
mPendingThemeChanged = PR_TRUE;
}
}
}
void
nsPresContext::ThemeChangedInternal()
{
mPendingThemeChanged = PR_FALSE;
// Tell the theme that it changed, so it can flush any handles to stale theme
// data.
if (mTheme && sThemeChanged) {
mTheme->ThemeChanged();
sThemeChanged = PR_FALSE;
}
// Clear all cached nsILookAndFeel colors.
if (mLookAndFeel && sLookAndFeelChanged) {
mLookAndFeel->LookAndFeelChanged();
sLookAndFeelChanged = PR_FALSE;
}
// This will force the system metrics to be generated the next time they're used
nsCSSRuleProcessor::FreeSystemMetrics();
// Changes to system metrics can change media queries on them.
MediaFeatureValuesChanged(PR_TRUE);
// Changes in theme can change system colors (whose changes are
// properly reflected in computed style data), system fonts (whose
// changes are not), and -moz-appearance (whose changes likewise are
// not), so we need to reflow.
RebuildAllStyleData(NS_STYLE_HINT_REFLOW);
}
void
nsPresContext::SysColorChanged()
{
if (!mPendingSysColorChanged) {
sLookAndFeelChanged = PR_TRUE;
nsCOMPtr<nsIRunnable> ev =
NS_NewRunnableMethod(this, &nsPresContext::SysColorChangedInternal);
if (NS_SUCCEEDED(NS_DispatchToCurrentThread(ev))) {
mPendingSysColorChanged = PR_TRUE;
}
}
}
void
nsPresContext::SysColorChangedInternal()
{
mPendingSysColorChanged = PR_FALSE;
if (mLookAndFeel && sLookAndFeelChanged) {
// Don't use the cached values for the system colors
mLookAndFeel->LookAndFeelChanged();
sLookAndFeelChanged = PR_FALSE;
}
// Reset default background and foreground colors for the document since
// they may be using system colors
GetDocumentColorPreferences();
// The system color values are computed to colors in the style data,
// so normal style data comparison is sufficient here.
RebuildAllStyleData(nsChangeHint(0));
}
void
nsPresContext::RebuildAllStyleData(nsChangeHint aExtraHint)
{
if (!mShell) {
// We must have been torn down. Nothing to do here.
return;
}
RebuildUserFontSet();
mShell->FrameConstructor()->RebuildAllStyleData(aExtraHint);
}
void
nsPresContext::PostRebuildAllStyleDataEvent(nsChangeHint aExtraHint)
{
if (!mShell) {
// We must have been torn down. Nothing to do here.
return;
}
mShell->FrameConstructor()->PostRebuildAllStyleDataEvent(aExtraHint);
}
void
nsPresContext::MediaFeatureValuesChanged(PRBool aCallerWillRebuildStyleData)
{
mPendingMediaFeatureValuesChanged = PR_FALSE;
if (mShell &&
mShell->StyleSet()->MediumFeaturesChanged(this) &&
!aCallerWillRebuildStyleData) {
RebuildAllStyleData(nsChangeHint(0));
}
}
void
nsPresContext::PostMediaFeatureValuesChangedEvent()
{
if (!mPendingMediaFeatureValuesChanged) {
nsCOMPtr<nsIRunnable> ev =
NS_NewRunnableMethod(this, &nsPresContext::HandleMediaFeatureValuesChangedEvent);
if (NS_SUCCEEDED(NS_DispatchToCurrentThread(ev))) {
mPendingMediaFeatureValuesChanged = PR_TRUE;
}
}
}
void
nsPresContext::HandleMediaFeatureValuesChangedEvent()
{
// Null-check mShell in case the shell has been destroyed (and the
// event is the only thing holding the pres context alive).
if (mPendingMediaFeatureValuesChanged && mShell) {
MediaFeatureValuesChanged(PR_FALSE);
}
}
void
nsPresContext::SetPaginatedScrolling(PRBool aPaginated)
{
if (mType == eContext_PrintPreview || mType == eContext_PageLayout)
mCanPaginatedScroll = aPaginated;
}
void
nsPresContext::SetPrintSettings(nsIPrintSettings *aPrintSettings)
{
if (mMedium == nsGkAtoms::print)
mPrintSettings = aPrintSettings;
}
PRBool
nsPresContext::EnsureVisible()
{
nsCOMPtr<nsIDocShell> docShell(do_QueryReferent(mContainer));
if (docShell) {
nsCOMPtr<nsIContentViewer> cv;
docShell->GetContentViewer(getter_AddRefs(cv));
// Make sure this is the content viewer we belong with
nsCOMPtr<nsIDocumentViewer> docV(do_QueryInterface(cv));
if (docV) {
nsRefPtr<nsPresContext> currentPresContext;
docV->GetPresContext(getter_AddRefs(currentPresContext));
if (currentPresContext == this) {
// OK, this is us. We want to call Show() on the content viewer.
cv->Show();
return PR_TRUE;
}
}
}
return PR_FALSE;
}
#ifdef MOZ_REFLOW_PERF
void
nsPresContext::CountReflows(const char * aName, nsIFrame * aFrame)
{
if (mShell) {
mShell->CountReflows(aName, aFrame);
}
}
#endif
PRBool
nsPresContext::IsChromeSlow() const
{
PRBool isChrome = PR_FALSE;
nsCOMPtr<nsISupports> container = GetContainer();
if (container) {
nsresult result;
nsCOMPtr<nsIDocShellTreeItem> docShell(do_QueryInterface(container, &result));
if (NS_SUCCEEDED(result) && docShell) {
PRInt32 docShellType;
result = docShell->GetItemType(&docShellType);
if (NS_SUCCEEDED(result)) {
isChrome = nsIDocShellTreeItem::typeChrome == docShellType;
}
}
}
mIsChrome = isChrome;
mIsChromeIsCached = PR_TRUE;
return mIsChrome;
}
void
nsPresContext::InvalidateIsChromeCacheExternal()
{
InvalidateIsChromeCacheInternal();
}
/* virtual */ PRBool
nsPresContext::HasAuthorSpecifiedRules(nsIFrame *aFrame, PRUint32 ruleTypeMask) const
{
return
nsRuleNode::HasAuthorSpecifiedRules(aFrame->GetStyleContext(),
ruleTypeMask,
UseDocumentColors());
}
static void
InsertFontFaceRule(nsCSSFontFaceRule *aRule, gfxUserFontSet* aFontSet,
PRUint8 aSheetType)
{
NS_ABORT_IF_FALSE(aRule->GetType() == nsICSSRule::FONT_FACE_RULE,
"InsertFontFaceRule passed a non-fontface CSS rule");
// aRule->List();
nsAutoString fontfamily;
nsCSSValue val;
PRUint32 unit;
PRUint32 weight = NS_STYLE_FONT_WEIGHT_NORMAL;
PRUint32 stretch = NS_STYLE_FONT_STRETCH_NORMAL;
PRUint32 italicStyle = FONT_STYLE_NORMAL;
nsString featureSettings, languageOverride;
// set up family name
aRule->GetDesc(eCSSFontDesc_Family, val);
unit = val.GetUnit();
if (unit == eCSSUnit_String) {
val.GetStringValue(fontfamily);
} else {
NS_ASSERTION(unit == eCSSUnit_Null,
"@font-face family name has unexpected unit");
// If there is no family name, this rule cannot contribute a
// usable font, so there is no point in processing it further.
return;
}
// set up weight
aRule->GetDesc(eCSSFontDesc_Weight, val);
unit = val.GetUnit();
if (unit == eCSSUnit_Integer || unit == eCSSUnit_Enumerated) {
weight = val.GetIntValue();
} else if (unit == eCSSUnit_Normal) {
weight = NS_STYLE_FONT_WEIGHT_NORMAL;
} else {
NS_ASSERTION(unit == eCSSUnit_Null,
"@font-face weight has unexpected unit");
}
// set up stretch
aRule->GetDesc(eCSSFontDesc_Stretch, val);
unit = val.GetUnit();
if (unit == eCSSUnit_Enumerated) {
stretch = val.GetIntValue();
} else if (unit == eCSSUnit_Normal) {
stretch = NS_STYLE_FONT_STRETCH_NORMAL;
} else {
NS_ASSERTION(unit == eCSSUnit_Null,
"@font-face stretch has unexpected unit");
}
// set up font style
aRule->GetDesc(eCSSFontDesc_Style, val);
unit = val.GetUnit();
if (unit == eCSSUnit_Enumerated) {
italicStyle = val.GetIntValue();
} else if (unit == eCSSUnit_Normal) {
italicStyle = FONT_STYLE_NORMAL;
} else {
NS_ASSERTION(unit == eCSSUnit_Null,
"@font-face style has unexpected unit");
}
// set up font features
aRule->GetDesc(eCSSFontDesc_FontFeatureSettings, val);
unit = val.GetUnit();
if (unit == eCSSUnit_Normal) {
// empty feature string
} else if (unit == eCSSUnit_String) {
val.GetStringValue(featureSettings);
} else {
NS_ASSERTION(unit == eCSSUnit_Null,
"@font-face font-feature-settings has unexpected unit");
}
// set up font language override
aRule->GetDesc(eCSSFontDesc_FontLanguageOverride, val);
unit = val.GetUnit();
if (unit == eCSSUnit_Normal) {
// empty feature string
} else if (unit == eCSSUnit_String) {
val.GetStringValue(languageOverride);
} else {
NS_ASSERTION(unit == eCSSUnit_Null,
"@font-face font-language-override has unexpected unit");
}
// set up src array
nsTArray<gfxFontFaceSrc> srcArray;
aRule->GetDesc(eCSSFontDesc_Src, val);
unit = val.GetUnit();
if (unit == eCSSUnit_Array) {
nsCSSValue::Array *srcArr = val.GetArrayValue();
size_t numSrc = srcArr->Count();
for (size_t i = 0; i < numSrc; i++) {
val = srcArr->Item(i);
unit = val.GetUnit();
gfxFontFaceSrc *face = srcArray.AppendElements(1);
if (!face)
return;
switch (unit) {
case eCSSUnit_Local_Font:
val.GetStringValue(face->mLocalName);
face->mIsLocal = PR_TRUE;
face->mURI = nsnull;
face->mFormatFlags = 0;
break;
case eCSSUnit_URL:
face->mIsLocal = PR_FALSE;
face->mURI = val.GetURLValue();
NS_ASSERTION(face->mURI, "null url in @font-face rule");
face->mReferrer = val.GetURLStructValue()->mReferrer;
face->mOriginPrincipal = val.GetURLStructValue()->mOriginPrincipal;
NS_ASSERTION(face->mOriginPrincipal, "null origin principal in @font-face rule");
// agent and user stylesheets are treated slightly differently,
// the same-site origin check and access control headers are
// enforced against the sheet principal rather than the document
// principal to allow user stylesheets to include @font-face rules
face->mUseOriginPrincipal = (aSheetType == nsStyleSet::eUserSheet ||
aSheetType == nsStyleSet::eAgentSheet);
face->mLocalName.Truncate();
face->mFormatFlags = 0;
while (i + 1 < numSrc && (val = srcArr->Item(i+1),
val.GetUnit() == eCSSUnit_Font_Format)) {
nsDependentString valueString(val.GetStringBufferValue());
if (valueString.LowerCaseEqualsASCII("woff")) {
face->mFormatFlags |= gfxUserFontSet::FLAG_FORMAT_WOFF;
} else if (valueString.LowerCaseEqualsASCII("opentype")) {
face->mFormatFlags |= gfxUserFontSet::FLAG_FORMAT_OPENTYPE;
} else if (valueString.LowerCaseEqualsASCII("truetype")) {
face->mFormatFlags |= gfxUserFontSet::FLAG_FORMAT_TRUETYPE;
} else if (valueString.LowerCaseEqualsASCII("truetype-aat")) {
face->mFormatFlags |= gfxUserFontSet::FLAG_FORMAT_TRUETYPE_AAT;
} else if (valueString.LowerCaseEqualsASCII("embedded-opentype")) {
face->mFormatFlags |= gfxUserFontSet::FLAG_FORMAT_EOT;
} else if (valueString.LowerCaseEqualsASCII("svg")) {
face->mFormatFlags |= gfxUserFontSet::FLAG_FORMAT_SVG;
} else {
// unknown format specified, mark to distinguish from the
// case where no format hints are specified
face->mFormatFlags |= gfxUserFontSet::FLAG_FORMAT_UNKNOWN;
}
i++;
}
break;
default:
NS_ASSERTION(unit == eCSSUnit_Local_Font || unit == eCSSUnit_URL,
"strange unit type in font-face src array");
break;
}
}
} else {
NS_ASSERTION(unit == eCSSUnit_Null, "@font-face src has unexpected unit");
}
if (!fontfamily.IsEmpty() && srcArray.Length() > 0) {
aFontSet->AddFontFace(fontfamily, srcArray, weight, stretch, italicStyle,
featureSettings, languageOverride);
}
}
gfxUserFontSet*
nsPresContext::GetUserFontSetInternal()
{
// We want to initialize the user font set lazily the first time the
// user asks for it, rather than building it too early and forcing
// rule cascade creation. Thus we try to enforce the invariant that
// we *never* build the user font set until the first call to
// GetUserFontSet. However, once it's been requested, we can't wait
// for somebody to call GetUserFontSet in order to rebuild it (see
// comments below in RebuildUserFontSet for why).
#ifdef DEBUG
PRBool userFontSetGottenBefore = mGetUserFontSetCalled;
#endif
// Set mGetUserFontSetCalled up front, so that FlushUserFontSet will actually
// flush.
mGetUserFontSetCalled = PR_TRUE;
if (mUserFontSetDirty) {
// If this assertion fails, and there have actually been changes to
// @font-face rules, then we will call StyleChangeReflow in
// FlushUserFontSet. If we're in the middle of reflow,
// that's a bad thing to do, and the caller was responsible for
// flushing first. If we're not (e.g., in frame construction), it's
// ok.
NS_ASSERTION(!userFontSetGottenBefore || !mShell->IsReflowLocked(),
"FlushUserFontSet should have been called first");
FlushUserFontSet();
}
return mUserFontSet;
}
gfxUserFontSet*
nsPresContext::GetUserFontSetExternal()
{
return GetUserFontSetInternal();
}
void
nsPresContext::FlushUserFontSet()
{
if (!mShell)
return; // we've been torn down
if (!mGetUserFontSetCalled) {
return; // No one cares about this font set yet, but we want to be careful
// to not unset our mUserFontSetDirty bit, so when someone really
// does we'll create it.
}
if (mUserFontSetDirty) {
if (gfxPlatform::GetPlatform()->DownloadableFontsEnabled()) {
nsRefPtr<gfxUserFontSet> oldUserFontSet = mUserFontSet;
nsTArray<nsFontFaceRuleContainer> rules;
if (!mShell->StyleSet()->AppendFontFaceRules(this, rules))
return;
PRBool differ;
if (rules.Length() == mFontFaceRules.Length()) {
differ = PR_FALSE;
for (PRUint32 i = 0, i_end = rules.Length(); i < i_end; ++i) {
if (rules[i].mRule != mFontFaceRules[i].mRule ||
rules[i].mSheetType != mFontFaceRules[i].mSheetType) {
differ = PR_TRUE;
break;
}
}
} else {
differ = PR_TRUE;
}
// Only rebuild things if the set of @font-face rules is different.
if (differ) {
if (mUserFontSet) {
mUserFontSet->Destroy();
NS_RELEASE(mUserFontSet);
}
if (rules.Length() > 0) {
nsUserFontSet *fs = new nsUserFontSet(this);
if (!fs)
return;
mUserFontSet = fs;
NS_ADDREF(mUserFontSet);
for (PRUint32 i = 0, i_end = rules.Length(); i < i_end; ++i) {
InsertFontFaceRule(rules[i].mRule, fs, rules[i].mSheetType);
}
}
}
#ifdef DEBUG
PRBool success =
#endif
rules.SwapElements(mFontFaceRules);
NS_ASSERTION(success, "should never fail given both are heap arrays");
if (mGetUserFontSetCalled && oldUserFontSet != mUserFontSet) {
// If we've changed, created, or destroyed a user font set, we
// need to trigger a style change reflow.
// We need to enqueue a style change reflow (for later) to
// reflect that we're dropping @font-face rules. (However,
// without a reflow, nothing will happen to start any downloads
// that are needed.)
UserFontSetUpdated();
}
}
mUserFontSetDirty = PR_FALSE;
}
}
void
nsPresContext::RebuildUserFontSet()
{
if (!mGetUserFontSetCalled) {
// We want to lazily build the user font set the first time it's
// requested (so we don't force creation of rule cascades too
// early), so don't do anything now.
return;
}
mUserFontSetDirty = PR_TRUE;
// Somebody has already asked for the user font set, so we need to
// post an event to rebuild it. Setting the user font set to be dirty
// and lazily rebuilding it isn't sufficient, since it is only the act
// of rebuilding it that will trigger the style change reflow that
// calls GetUserFontSet. (This reflow causes rebuilding of text runs,
// which starts font loads, whose completion causes another style
// change reflow).
if (!mPostedFlushUserFontSet) {
nsCOMPtr<nsIRunnable> ev =
NS_NewRunnableMethod(this, &nsPresContext::HandleRebuildUserFontSet);
if (NS_SUCCEEDED(NS_DispatchToCurrentThread(ev))) {
mPostedFlushUserFontSet = PR_TRUE;
}
}
}
void
nsPresContext::UserFontSetUpdated()
{
if (!mShell)
return;
// Changes to the set of available fonts can cause updates to layout by:
//
// 1. Changing the font used for text, which changes anything that
// depends on text measurement, including line breaking and
// intrinsic widths, and any other parts of layout that depend on
// font metrics. This requires a style change reflow to update.
//
// 2. Changing the value of the 'ex' and 'ch' units in style data,
// which also depend on font metrics. Updating this information
// requires rebuilding the rule tree from the top, avoiding the
// reuse of cached data even when no style rules have changed.
PostRebuildAllStyleDataEvent(NS_STYLE_HINT_REFLOW);
}
PRBool
nsPresContext::EnsureSafeToHandOutCSSRules()
{
nsCSSStyleSheet::EnsureUniqueInnerResult res =
mShell->StyleSet()->EnsureUniqueInnerOnCSSSheets();
if (res == nsCSSStyleSheet::eUniqueInner_AlreadyUnique) {
// Nothing to do.
return PR_TRUE;
}
if (res == nsCSSStyleSheet::eUniqueInner_CloneFailed) {
return PR_FALSE;
}
NS_ABORT_IF_FALSE(res == nsCSSStyleSheet::eUniqueInner_ClonedInner,
"unexpected result");
RebuildAllStyleData(nsChangeHint(0));
return PR_TRUE;
}
void
nsPresContext::FireDOMPaintEvent()
{
nsPIDOMWindow* ourWindow = mDocument->GetWindow();
if (!ourWindow)
return;
nsCOMPtr<nsIDOMEventTarget> dispatchTarget = do_QueryInterface(ourWindow);
nsCOMPtr<nsIDOMEventTarget> eventTarget = dispatchTarget;
if (!IsChrome()) {
PRBool notifyContent = mSendAfterPaintToContent;
if (notifyContent) {
// If the pref is set, we still don't post events when they're
// entirely cross-doc.
notifyContent = PR_FALSE;
for (PRUint32 i = 0; i < mInvalidateRequests.mRequests.Length(); ++i) {
if (!(mInvalidateRequests.mRequests[i].mFlags &
nsIFrame::INVALIDATE_CROSS_DOC)) {
notifyContent = PR_TRUE;
}
}
}
if (!notifyContent) {
// Don't tell the window about this event, it should not know that
// something happened in a subdocument. Tell only the chrome event handler.
// (Events sent to the window get propagated to the chrome event handler
// automatically.)
dispatchTarget = do_QueryInterface(ourWindow->GetParentTarget());
if (!dispatchTarget) {
return;
}
}
}
// Events sent to the window get propagated to the chrome event handler
// automatically.
nsCOMPtr<nsIDOMEvent> event;
// This will empty our list in case dispatching the event causes more damage
// (hopefully it won't, or we're likely to get an infinite loop! At least
// it won't be blocking app execution though).
NS_NewDOMNotifyPaintEvent(getter_AddRefs(event), this, nsnull,
NS_AFTERPAINT,
&mInvalidateRequests);
nsCOMPtr<nsIPrivateDOMEvent> pEvent = do_QueryInterface(event);
if (!pEvent) return;
// Even if we're not telling the window about the event (so eventTarget is
// the chrome event handler, not the window), the window is still
// logically the event target.
pEvent->SetTarget(eventTarget);
pEvent->SetTrusted(PR_TRUE);
nsEventDispatcher::DispatchDOMEvent(dispatchTarget, nsnull, event, this, nsnull);
}
static PRBool
MayHavePaintEventListener(nsPIDOMWindow* aInnerWindow)
{
if (!aInnerWindow)
return PR_FALSE;
if (aInnerWindow->HasPaintEventListeners())
return PR_TRUE;
nsPIDOMEventTarget* parentTarget = aInnerWindow->GetParentTarget();
if (!parentTarget)
return PR_FALSE;
nsIEventListenerManager* manager = nsnull;
if ((manager = parentTarget->GetListenerManager(PR_FALSE)) &&
manager->MayHavePaintEventListener()) {
return PR_TRUE;
}
nsCOMPtr<nsINode> node;
if (parentTarget != aInnerWindow->GetChromeEventHandler()) {
nsCOMPtr<nsIInProcessContentFrameMessageManager> mm =
do_QueryInterface(parentTarget);
if (mm) {
node = mm->GetOwnerContent();
}
}
if (!node) {
node = do_QueryInterface(parentTarget);
}
if (node)
return MayHavePaintEventListener(node->GetOwnerDoc()->GetInnerWindow());
nsCOMPtr<nsPIDOMWindow> window = do_QueryInterface(parentTarget);
if (window)
return MayHavePaintEventListener(window);
nsCOMPtr<nsPIWindowRoot> root = do_QueryInterface(parentTarget);
nsPIDOMEventTarget* tabChildGlobal;
return root &&
(tabChildGlobal = root->GetParentTarget()) &&
(manager = tabChildGlobal->GetListenerManager(PR_FALSE)) &&
manager->MayHavePaintEventListener();
}
PRBool
nsPresContext::MayHavePaintEventListener()
{
return ::MayHavePaintEventListener(mDocument->GetInnerWindow());
}
void
nsPresContext::NotifyInvalidation(const nsRect& aRect, PRUint32 aFlags)
{
// If there is no paint event listener, then we don't need to fire
// the asynchronous event. We don't even need to record invalidation.
// MayHavePaintEventListener is pretty cheap and we could make it
// even cheaper by providing a more efficient
// nsPIDOMWindow::GetListenerManager.
if (aRect.IsEmpty() || !MayHavePaintEventListener())
return;
nsPresContext* pc;
for (pc = this; pc; pc = GetParentPresContext(pc)) {
if (pc->mFireAfterPaintEvents)
break;
pc->mFireAfterPaintEvents = PR_TRUE;
}
if (!pc) {
nsRootPresContext* rpc = GetRootPresContext();
if (rpc) {
rpc->EnsureEventualDidPaintEvent();
}
}
nsInvalidateRequestList::Request* request =
mInvalidateRequests.mRequests.AppendElement();
if (!request)
return;
request->mRect = aRect;
request->mFlags = aFlags;
}
static PRBool
NotifyDidPaintSubdocumentCallback(nsIDocument* aDocument, void* aData)
{
nsIPresShell* shell = aDocument->GetShell();
if (shell) {
nsPresContext* pc = shell->GetPresContext();
if (pc) {
pc->NotifyDidPaintForSubtree();
}
}
return PR_TRUE;
}
void
nsPresContext::NotifyDidPaintForSubtree()
{
if (!mFireAfterPaintEvents)
return;
mFireAfterPaintEvents = PR_FALSE;
if (IsRoot()) {
static_cast<nsRootPresContext*>(this)->CancelDidPaintTimer();
}
if (!mInvalidateRequests.mRequests.IsEmpty()) {
nsCOMPtr<nsIRunnable> ev =
NS_NewRunnableMethod(this, &nsPresContext::FireDOMPaintEvent);
nsContentUtils::AddScriptRunner(ev);
}
mDocument->EnumerateSubDocuments(NotifyDidPaintSubdocumentCallback, nsnull);
}
PRBool
nsPresContext::HasCachedStyleData()
{
return mShell && mShell->StyleSet()->HasCachedStyleData();
}
static PRBool sGotInterruptEnv = PR_FALSE;
enum InterruptMode {
ModeRandom,
ModeCounter,
ModeEvent
};
// Controlled by the GECKO_REFLOW_INTERRUPT_MODE env var; allowed values are
// "random" (except on Windows) or "counter". If neither is used, the mode is
// ModeEvent.
static InterruptMode sInterruptMode = ModeEvent;
// Used for the "random" mode. Controlled by the GECKO_REFLOW_INTERRUPT_SEED
// env var.
static PRUint32 sInterruptSeed = 1;
// Used for the "counter" mode. This is the number of unskipped interrupt
// checks that have to happen before we interrupt. Controlled by the
// GECKO_REFLOW_INTERRUPT_FREQUENCY env var.
static PRUint32 sInterruptMaxCounter = 10;
// Used for the "counter" mode. This counts up to sInterruptMaxCounter and is
// then reset to 0.
static PRUint32 sInterruptCounter;
// Number of interrupt checks to skip before really trying to interrupt.
// Controlled by the GECKO_REFLOW_INTERRUPT_CHECKS_TO_SKIP env var.
static PRUint32 sInterruptChecksToSkip = 200;
// Number of milliseconds that a reflow should be allowed to run for before we
// actually allow interruption. Controlled by the
// GECKO_REFLOW_MIN_NOINTERRUPT_DURATION env var.
static TimeDuration sInterruptTimeout = TimeDuration::FromMilliseconds(100);
static void GetInterruptEnv()
{
char *ev = PR_GetEnv("GECKO_REFLOW_INTERRUPT_MODE");
if (ev) {
#ifndef XP_WIN
if (PL_strcasecmp(ev, "random") == 0) {
ev = PR_GetEnv("GECKO_REFLOW_INTERRUPT_SEED");
if (ev) {
sInterruptSeed = atoi(ev);
}
srandom(sInterruptSeed);
sInterruptMode = ModeRandom;
} else
#endif
if (PL_strcasecmp(ev, "counter") == 0) {
ev = PR_GetEnv("GECKO_REFLOW_INTERRUPT_FREQUENCY");
if (ev) {
sInterruptMaxCounter = atoi(ev);
}
sInterruptCounter = 0;
sInterruptMode = ModeCounter;
}
}
ev = PR_GetEnv("GECKO_REFLOW_INTERRUPT_CHECKS_TO_SKIP");
if (ev) {
sInterruptChecksToSkip = atoi(ev);
}
ev = PR_GetEnv("GECKO_REFLOW_MIN_NOINTERRUPT_DURATION");
if (ev) {
sInterruptTimeout = TimeDuration::FromMilliseconds(atoi(ev));
}
}
PRBool
nsPresContext::HavePendingInputEvent()
{
switch (sInterruptMode) {
#ifndef XP_WIN
case ModeRandom:
return (random() & 1);
#endif
case ModeCounter:
if (sInterruptCounter < sInterruptMaxCounter) {
++sInterruptCounter;
return PR_FALSE;
}
sInterruptCounter = 0;
return PR_TRUE;
default:
case ModeEvent: {
nsIFrame* f = PresShell()->GetRootFrame();
if (f) {
nsIWidget* w = f->GetNearestWidget();
if (w) {
return w->HasPendingInputEvent();
}
}
return PR_FALSE;
}
}
}
void
nsPresContext::ReflowStarted(PRBool aInterruptible)
{
#ifdef NOISY_INTERRUPTIBLE_REFLOW
if (!aInterruptible) {
printf("STARTING NONINTERRUPTIBLE REFLOW\n");
}
#endif
// We don't support interrupting in paginated contexts, since page
// sequences only handle initial reflow
mInterruptsEnabled = aInterruptible && !IsPaginated();
// Don't set mHasPendingInterrupt based on HavePendingInputEvent() here. If
// we ever change that, then we need to update the code in
// PresShell::DoReflow to only add the just-reflown root to dirty roots if
// it's actually dirty. Otherwise we can end up adding a root that has no
// interruptible descendants, just because we detected an interrupt at reflow
// start.
mHasPendingInterrupt = PR_FALSE;
mInterruptChecksToSkip = sInterruptChecksToSkip;
if (mInterruptsEnabled) {
mReflowStartTime = TimeStamp::Now();
}
}
PRBool
nsPresContext::CheckForInterrupt(nsIFrame* aFrame)
{
if (mHasPendingInterrupt) {
mShell->FrameNeedsToContinueReflow(aFrame);
return PR_TRUE;
}
if (!sGotInterruptEnv) {
sGotInterruptEnv = PR_TRUE;
GetInterruptEnv();
}
if (!mInterruptsEnabled) {
return PR_FALSE;
}
if (mInterruptChecksToSkip > 0) {
--mInterruptChecksToSkip;
return PR_FALSE;
}
mInterruptChecksToSkip = sInterruptChecksToSkip;
// Don't interrupt if it's been less than sInterruptTimeout since we started
// the reflow.
mHasPendingInterrupt =
TimeStamp::Now() - mReflowStartTime > sInterruptTimeout &&
HavePendingInputEvent() &&
!IsChrome();
if (mHasPendingInterrupt) {
#ifdef NOISY_INTERRUPTIBLE_REFLOW
printf("*** DETECTED pending interrupt (time=%lld)\n", PR_Now());
#endif /* NOISY_INTERRUPTIBLE_REFLOW */
mShell->FrameNeedsToContinueReflow(aFrame);
}
return mHasPendingInterrupt;
}
PRBool
nsPresContext::IsRootContentDocument()
{
// We are a root content document if: we are not a resource doc, we are
// not chrome, and we either have no parent or our parent is chrome.
if (mDocument->IsResourceDoc()) {
return PR_FALSE;
}
if (IsChrome()) {
return PR_FALSE;
}
// We may not have a root frame, so use views.
nsIViewManager* vm = PresShell()->GetViewManager();
nsIView* view = nsnull;
if (NS_FAILED(vm->GetRootView(view)) || !view) {
return PR_FALSE;
}
view = view->GetParent(); // anonymous inner view
if (!view) {
return PR_TRUE;
}
view = view->GetParent(); // subdocumentframe's view
if (!view) {
return PR_TRUE;
}
nsIFrame* f = static_cast<nsIFrame*>(view->GetClientData());
return (f && f->PresContext()->IsChrome());
}
nsRootPresContext::nsRootPresContext(nsIDocument* aDocument,
nsPresContextType aType)
: nsPresContext(aDocument, aType),
mUpdatePluginGeometryForFrame(nsnull),
mDOMGeneration(0),
mNeedsToUpdatePluginGeometry(PR_FALSE)
{
mRegisteredPlugins.Init();
}
nsRootPresContext::~nsRootPresContext()
{
NS_ASSERTION(mRegisteredPlugins.Count() == 0,
"All plugins should have been unregistered");
CancelDidPaintTimer();
}
void
nsRootPresContext::RegisterPluginForGeometryUpdates(nsObjectFrame* aPlugin)
{
mRegisteredPlugins.PutEntry(aPlugin);
}
void
nsRootPresContext::UnregisterPluginForGeometryUpdates(nsObjectFrame* aPlugin)
{
mRegisteredPlugins.RemoveEntry(aPlugin);
}
struct PluginGeometryClosure {
nsIFrame* mRootFrame;
PRInt32 mRootAPD;
nsIFrame* mChangedSubtree;
nsRect mChangedRect;
nsTHashtable<nsPtrHashKey<nsObjectFrame> > mAffectedPlugins;
nsRect mAffectedPluginBounds;
nsTArray<nsIWidget::Configuration>* mOutputConfigurations;
};
static PLDHashOperator
PluginBoundsEnumerator(nsPtrHashKey<nsObjectFrame>* aEntry, void* userArg)
{
PluginGeometryClosure* closure = static_cast<PluginGeometryClosure*>(userArg);
nsObjectFrame* f = aEntry->GetKey();
nsRect fBounds = f->GetContentRect() +
f->GetParent()->GetOffsetToCrossDoc(closure->mRootFrame);
PRInt32 APD = f->PresContext()->AppUnitsPerDevPixel();
fBounds = fBounds.ConvertAppUnitsRoundOut(APD, closure->mRootAPD);
// We're identifying the plugins that may have been affected by changes
// to the frame subtree rooted at aChangedRoot. Any plugin that overlaps
// the overflow area of aChangedRoot could have its clip region affected
// because it might be covered (or uncovered) by changes to the subtree.
// Plugins in the subtree might have changed position and/or size, and
// they might not be in aChangedRoot's overflow area (because they're
// being clipped by an ancestor in the subtree).
if (fBounds.Intersects(closure->mChangedRect) ||
nsLayoutUtils::IsAncestorFrameCrossDoc(closure->mChangedSubtree, f)) {
closure->mAffectedPluginBounds.UnionRect(
closure->mAffectedPluginBounds, fBounds);
closure->mAffectedPlugins.PutEntry(f);
}
return PL_DHASH_NEXT;
}
static PLDHashOperator
PluginHideEnumerator(nsPtrHashKey<nsObjectFrame>* aEntry, void* userArg)
{
PluginGeometryClosure* closure = static_cast<PluginGeometryClosure*>(userArg);
nsObjectFrame* f = aEntry->GetKey();
f->GetEmptyClipConfiguration(closure->mOutputConfigurations);
return PL_DHASH_NEXT;
}
static void
RecoverPluginGeometry(nsDisplayListBuilder* aBuilder,
nsDisplayList* aList, PluginGeometryClosure* aClosure)
{
for (nsDisplayItem* i = aList->GetBottom(); i; i = i->GetAbove()) {
switch (i->GetType()) {
case nsDisplayItem::TYPE_PLUGIN: {
nsDisplayPlugin* displayPlugin = static_cast<nsDisplayPlugin*>(i);
nsObjectFrame* f = static_cast<nsObjectFrame*>(
displayPlugin->GetUnderlyingFrame());
// Ignore plugins which aren't supposed to be affected by this
// operation --- their bounds will not have been included in the
// display list computations so the visible region computed for them
// would be incorrect
nsPtrHashKey<nsObjectFrame>* entry =
aClosure->mAffectedPlugins.GetEntry(f);
if (entry) {
displayPlugin->GetWidgetConfiguration(aBuilder,
aClosure->mOutputConfigurations);
// we've dealt with this plugin now
aClosure->mAffectedPlugins.RawRemoveEntry(entry);
}
break;
}
default: {
nsDisplayList* sublist = i->GetList();
if (sublist) {
RecoverPluginGeometry(aBuilder, sublist, aClosure);
}
break;
}
}
}
}
#ifdef DEBUG
#include <stdio.h>
static PRBool gDumpPluginList = PR_FALSE;
#endif
void
nsRootPresContext::GetPluginGeometryUpdates(nsIFrame* aChangedSubtree,
nsTArray<nsIWidget::Configuration>* aConfigurations)
{
if (mRegisteredPlugins.Count() == 0)
return;
PluginGeometryClosure closure;
closure.mRootFrame = mShell->FrameManager()->GetRootFrame();
closure.mRootAPD = closure.mRootFrame->PresContext()->AppUnitsPerDevPixel();
closure.mChangedSubtree = aChangedSubtree;
closure.mChangedRect = aChangedSubtree->GetVisualOverflowRect() +
aChangedSubtree->GetOffsetToCrossDoc(closure.mRootFrame);
PRInt32 subtreeAPD = aChangedSubtree->PresContext()->AppUnitsPerDevPixel();
closure.mChangedRect =
closure.mChangedRect.ConvertAppUnitsRoundOut(subtreeAPD, closure.mRootAPD);
closure.mAffectedPlugins.Init();
closure.mOutputConfigurations = aConfigurations;
// Fill in closure.mAffectedPlugins and closure.mAffectedPluginBounds
mRegisteredPlugins.EnumerateEntries(PluginBoundsEnumerator, &closure);
nsRect bounds;
if (bounds.IntersectRect(closure.mAffectedPluginBounds,
closure.mRootFrame->GetRect())) {
nsDisplayListBuilder builder(closure.mRootFrame,
nsDisplayListBuilder::PLUGIN_GEOMETRY, PR_FALSE);
builder.SetAccurateVisibleRegions();
nsDisplayList list;
builder.EnterPresShell(closure.mRootFrame, bounds);
closure.mRootFrame->BuildDisplayListForStackingContext(
&builder, bounds, &list);
builder.LeavePresShell(closure.mRootFrame, bounds);
#ifdef DEBUG
if (gDumpPluginList) {
fprintf(stderr, "Plugins --- before optimization (bounds %d,%d,%d,%d):\n",
bounds.x, bounds.y, bounds.width, bounds.height);
nsFrame::PrintDisplayList(&builder, list);
}
#endif
nsRegion visibleRegion(bounds);
list.ComputeVisibilityForRoot(&builder, &visibleRegion);
#ifdef DEBUG
if (gDumpPluginList) {
fprintf(stderr, "Plugins --- after optimization:\n");
nsFrame::PrintDisplayList(&builder, list);
}
#endif
RecoverPluginGeometry(&builder, &list, &closure);
list.DeleteAll();
}
// Plugins that we didn't find in the display list are not visible
closure.mAffectedPlugins.EnumerateEntries(PluginHideEnumerator, &closure);
}
static PRBool
HasOverlap(const nsIntPoint& aOffset1, const nsTArray<nsIntRect>& aClipRects1,
const nsIntPoint& aOffset2, const nsTArray<nsIntRect>& aClipRects2)
{
nsIntPoint offsetDelta = aOffset1 - aOffset2;
for (PRUint32 i = 0; i < aClipRects1.Length(); ++i) {
for (PRUint32 j = 0; j < aClipRects2.Length(); ++j) {
if ((aClipRects1[i] + offsetDelta).Intersects(aClipRects2[j]))
return PR_TRUE;
}
}
return PR_FALSE;
}
/**
* Given a list of plugin windows to move to new locations, sort the list
* so that for each window move, the window moves to a location that
* does not intersect other windows. This minimizes flicker and repainting.
* It's not always possible to do this perfectly, since in general
* we might have cycles. But we do our best.
* We need to take into account that windows are clipped to particular
* regions and the clip regions change as the windows are moved.
*/
static void
SortConfigurations(nsTArray<nsIWidget::Configuration>* aConfigurations)
{
if (aConfigurations->Length() > 10) {
// Give up, we don't want to get bogged down here
return;
}
nsTArray<nsIWidget::Configuration> pluginsToMove;
pluginsToMove.SwapElements(*aConfigurations);
// Our algorithm is quite naive. At each step we try to identify
// a window that can be moved to its new location that won't overlap
// any other windows at the new location. If there is no such
// window, we just move the last window in the list anyway.
while (!pluginsToMove.IsEmpty()) {
// Find a window whose destination does not overlap any other window
PRUint32 i;
for (i = 0; i + 1 < pluginsToMove.Length(); ++i) {
nsIWidget::Configuration* config = &pluginsToMove[i];
PRBool foundOverlap = PR_FALSE;
for (PRUint32 j = 0; j < pluginsToMove.Length(); ++j) {
if (i == j)
continue;
nsIntRect bounds;
pluginsToMove[j].mChild->GetBounds(bounds);
nsAutoTArray<nsIntRect,1> clipRects;
pluginsToMove[j].mChild->GetWindowClipRegion(&clipRects);
if (HasOverlap(bounds.TopLeft(), clipRects,
config->mBounds.TopLeft(),
config->mClipRegion)) {
foundOverlap = PR_TRUE;
break;
}
}
if (!foundOverlap)
break;
}
// Note that we always move the last plugin in pluginsToMove, if we
// can't find any other plugin to move
aConfigurations->AppendElement(pluginsToMove[i]);
pluginsToMove.RemoveElementAt(i);
}
}
void
nsRootPresContext::UpdatePluginGeometry()
{
if (!mNeedsToUpdatePluginGeometry)
return;
mNeedsToUpdatePluginGeometry = PR_FALSE;
nsIFrame* f = mUpdatePluginGeometryForFrame;
if (f) {
mUpdatePluginGeometryForFrame->PresContext()->
SetContainsUpdatePluginGeometryFrame(PR_FALSE);
mUpdatePluginGeometryForFrame = nsnull;
} else {
f = FrameManager()->GetRootFrame();
}
nsTArray<nsIWidget::Configuration> configurations;
GetPluginGeometryUpdates(f, &configurations);
if (configurations.IsEmpty())
return;
SortConfigurations(&configurations);
nsIWidget* widget = FrameManager()->GetRootFrame()->GetNearestWidget();
NS_ASSERTION(widget, "Plugins must have a parent window");
widget->ConfigureChildren(configurations);
DidApplyPluginGeometryUpdates();
}
void
nsRootPresContext::SynchronousPluginGeometryUpdate()
{
if (!mNeedsToUpdatePluginGeometry) {
// Nothing to do
return;
}
// Force synchronous paint
nsIPresShell* shell = GetPresShell();
if (!shell)
return;
nsIFrame* rootFrame = shell->GetRootFrame();
if (!rootFrame)
return;
nsCOMPtr<nsIWidget> widget = rootFrame->GetNearestWidget();
if (!widget)
return;
// Force synchronous paint of a single pixel, just to force plugin
// updates to be flushed. Doing plugin updates during paint is the best
// way to ensure that plugin updates are in sync with our content.
widget->Invalidate(nsIntRect(0,0,1,1), PR_TRUE);
// Update plugin geometry just in case that invalidate didn't work
// (e.g. if none of the widget is visible, it might not have processed
// a paint event). Normally this won't need to do anything.
UpdatePluginGeometry();
}
void
nsRootPresContext::RequestUpdatePluginGeometry(nsIFrame* aFrame)
{
if (mRegisteredPlugins.Count() == 0)
return;
if (!mNeedsToUpdatePluginGeometry) {
mNeedsToUpdatePluginGeometry = PR_TRUE;
// Dispatch a Gecko event to ensure plugin geometry gets updated
// XXX this really should be done through the refresh driver, once
// all painting happens in the refresh driver
nsCOMPtr<nsIRunnable> event =
NS_NewRunnableMethod(this, &nsRootPresContext::SynchronousPluginGeometryUpdate);
NS_DispatchToMainThread(event);
mUpdatePluginGeometryForFrame = aFrame;
mUpdatePluginGeometryForFrame->PresContext()->
SetContainsUpdatePluginGeometryFrame(PR_TRUE);
} else {
if (!mUpdatePluginGeometryForFrame ||
aFrame == mUpdatePluginGeometryForFrame)
return;
mUpdatePluginGeometryForFrame->PresContext()->
SetContainsUpdatePluginGeometryFrame(PR_FALSE);
mUpdatePluginGeometryForFrame = nsnull;
}
}
static PLDHashOperator
PluginDidSetGeometryEnumerator(nsPtrHashKey<nsObjectFrame>* aEntry, void* userArg)
{
nsObjectFrame* f = aEntry->GetKey();
f->DidSetWidgetGeometry();
return PL_DHASH_NEXT;
}
void
nsRootPresContext::DidApplyPluginGeometryUpdates()
{
mRegisteredPlugins.EnumerateEntries(PluginDidSetGeometryEnumerator, nsnull);
}
void
nsRootPresContext::RootForgetUpdatePluginGeometryFrame(nsIFrame* aFrame)
{
if (aFrame == mUpdatePluginGeometryForFrame) {
mUpdatePluginGeometryForFrame->PresContext()->
SetContainsUpdatePluginGeometryFrame(PR_FALSE);
mUpdatePluginGeometryForFrame = nsnull;
}
}
static void
NotifyDidPaintForSubtreeCallback(nsITimer *aTimer, void *aClosure)
{
nsPresContext* presContext = (nsPresContext*)aClosure;
nsAutoScriptBlocker blockScripts;
presContext->NotifyDidPaintForSubtree();
}
void
nsRootPresContext::EnsureEventualDidPaintEvent()
{
if (mNotifyDidPaintTimer)
return;
mNotifyDidPaintTimer = do_CreateInstance("@mozilla.org/timer;1");
if (!mNotifyDidPaintTimer)
return;
mNotifyDidPaintTimer->InitWithFuncCallback(NotifyDidPaintForSubtreeCallback,
(void*)this, 100, nsITimer::TYPE_ONE_SHOT);
}
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