/* -*- 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 , Mozilla Corporation * Ehsan Akhgari * * 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 "nsPIDOMWindow.h" #include "nsStyleSet.h" #include "nsImageLoader.h" #include "nsIContent.h" #include "nsIFrame.h" #include "nsIURL.h" #include "nsIDocument.h" #include "nsStyleContext.h" #include "mozilla/LookAndFeel.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 "nsEventListenerManager.h" #include "nsStyleStructInlines.h" #include "nsIAppShell.h" #include "prenv.h" #include "nsIPrivateDOMEvent.h" #include "nsIDOMEventTarget.h" #include "nsObjectFrame.h" #include "nsTransitionManager.h" #include "nsAnimationManager.h" #include "mozilla/dom/Element.h" #include "nsIFrameMessageManager.h" #include "FrameLayerBuilder.h" #include "nsDOMMediaQueryList.h" #include "nsSMILAnimationController.h" #ifdef IBMBIDI #include "nsBidiPresUtils.h" #endif // IBMBIDI #include "nsContentUtils.h" #include "nsPIWindowRoot.h" #include "mozilla/Preferences.h" // Needed for Start/Stop of Image Animation #include "imgIContainer.h" #include "nsIImageLoadingContent.h" //needed for resetting of image service color #include "nsLayoutCID.h" #include "nsCSSParser.h" using namespace mozilla; using namespace mozilla::dom; static nscolor MakeColorPref(const nsString& aColor) { nscolor color; nsCSSParser parser; nsresult rv = parser.ParseColorString(aColor, nsnull, 0, &color); if (NS_FAILED(rv)) { // Any better choices? color = NS_RGB(0, 0, 0); } return color; } 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 bool IsVisualCharset(const nsCString& aCharset) { if (aCharset.LowerCaseEqualsLiteral("ibm864") // Arabic//ahmed || aCharset.LowerCaseEqualsLiteral("ibm862") // Hebrew || aCharset.LowerCaseEqualsLiteral("iso-8859-8") ) { // Hebrew return true; // visual text type } else { return false; // logical text type } } #endif // IBMBIDI static PLDHashOperator destroy_loads(const void * aKey, nsRefPtr& aData, void* closure) { aData->Destroy(); return PL_DHASH_NEXT; } #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), mMinFontSize(0), 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 = true; SetBackgroundImageDraw(true); // always draw the background SetBackgroundColorDraw(true); mBackgroundColor = NS_RGB(0xFF, 0xFF, 0xFF); mUseDocumentColors = true; mUseDocumentFonts = 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 = true; mSendAfterPaintToContent = false; mFocusTextColor = mDefaultColor; mFocusBackgroundColor = mBackgroundColor; mFocusRingWidth = 1; mBodyTextColor = mDefaultColor; if (aType == eContext_Galley) { mMedium = nsGkAtoms::screen; } else { mMedium = nsGkAtoms::print; mPaginated = true; } if (!IsDynamic()) { mImageAnimationMode = imgIContainer::kDontAnimMode; mNeverAnimate = true; } else { mImageAnimationMode = imgIContainer::kNormalAnimMode; mNeverAnimate = false; } NS_ASSERTION(mDocument, "Null document"); mUserFontSet = nsnull; mUserFontSetDirty = true; PR_INIT_CLIST(&mDOMMediaQueryLists); } nsPresContext::~nsPresContext() { NS_PRECONDITION(!mShell, "Presshell forgot to clear our mShell pointer"); SetShell(nsnull); NS_ABORT_IF_FALSE(PR_CLIST_IS_EMPTY(&mDOMMediaQueryLists), "must not have media query lists left"); // 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 Preferences::UnregisterCallback(nsPresContext::PrefChangedCallback, "font.", this); Preferences::UnregisterCallback(nsPresContext::PrefChangedCallback, "browser.display.", this); Preferences::UnregisterCallback(nsPresContext::PrefChangedCallback, "browser.underline_anchors", this); Preferences::UnregisterCallback(nsPresContext::PrefChangedCallback, "browser.anchor_color", this); Preferences::UnregisterCallback(nsPresContext::PrefChangedCallback, "browser.active_color", this); Preferences::UnregisterCallback(nsPresContext::PrefChangedCallback, "browser.visited_color", this); Preferences::UnregisterCallback(nsPresContext::PrefChangedCallback, "image.animation_mode", this); #ifdef IBMBIDI Preferences::UnregisterCallback(nsPresContext::PrefChangedCallback, "bidi.", this); #endif // IBMBIDI Preferences::UnregisterCallback(nsPresContext::PrefChangedCallback, "dom.send_after_paint_to_content", this); Preferences::UnregisterCallback(nsPresContext::PrefChangedCallback, "gfx.font_rendering.", this); Preferences::UnregisterCallback(nsPresContext::PrefChangedCallback, "layout.css.dpi", this); Preferences::UnregisterCallback(nsPresContext::PrefChangedCallback, "layout.css.devPixelsPerPx", this); NS_IF_RELEASE(mDeviceContext); 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& aData, void* aClosure) { nsCycleCollectionTraversalCallback *cb = static_cast(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); // not xpcom NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR_AMBIGUOUS(mEventManager, nsIObserver); // 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); 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->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; } 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 bool sNoTheme = 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 bool 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 bool 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 = Preferences::GetCString("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 = Preferences::GetInt(pref.get()); if (unit == eUnit_px) { mMinimumFontSizePref = CSSPixelsToAppUnits(size); } else if (unit == eUnit_pt) { mMinimumFontSizePref = 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 = Preferences::GetString(pref.get()); if (!value.IsEmpty()) { font->name.Assign(value); } else { MAKE_FONT_PREF_KEY(pref, "font.default.", langGroup); value = Preferences::GetString(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 = Preferences::GetInt(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 = Preferences::GetCString(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; bool usePrefColors = true; nsCOMPtr docShell(do_QueryReferent(mContainer)); if (docShell) { PRInt32 docShellType; docShell->GetItemType(&docShellType); if (nsIDocShellTreeItem::typeChrome == docShellType) { usePrefColors = false; } else { useAccessibilityTheme = LookAndFeel::GetInt(LookAndFeel::eIntID_UseAccessibilityTheme, 0); usePrefColors = !useAccessibilityTheme; } } if (usePrefColors) { usePrefColors = !Preferences::GetBool("browser.display.use_system_colors", false); } if (usePrefColors) { nsAdoptingString colorStr = Preferences::GetString("browser.display.foreground_color"); if (!colorStr.IsEmpty()) { mDefaultColor = MakeColorPref(colorStr); } colorStr = Preferences::GetString("browser.display.background_color"); if (!colorStr.IsEmpty()) { mBackgroundColor = MakeColorPref(colorStr); } } else { mDefaultColor = LookAndFeel::GetColor(LookAndFeel::eColorID_WindowForeground, NS_RGB(0x00, 0x00, 0x00)); mBackgroundColor = LookAndFeel::GetColor(LookAndFeel::eColorID_WindowBackground, NS_RGB(0xFF, 0xFF, 0xFF)); } // Wherever we got the default background color from, ensure it is // opaque. mBackgroundColor = NS_ComposeColors(NS_RGB(0xFF, 0xFF, 0xFF), mBackgroundColor); mUseDocumentColors = !useAccessibilityTheme && Preferences::GetBool("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; } mAutoQualityMinFontSizePixelsPref = Preferences::GetInt("browser.display.auto_quality_min_font_size"); // * document colors GetDocumentColorPreferences(); mSendAfterPaintToContent = Preferences::GetBool("dom.send_after_paint_to_content", mSendAfterPaintToContent); // * link colors mUnderlineLinks = Preferences::GetBool("browser.underline_anchors", mUnderlineLinks); nsAdoptingString colorStr = Preferences::GetString("browser.anchor_color"); if (!colorStr.IsEmpty()) { mLinkColor = MakeColorPref(colorStr); } colorStr = Preferences::GetString("browser.active_color"); if (!colorStr.IsEmpty()) { mActiveLinkColor = MakeColorPref(colorStr); } colorStr = Preferences::GetString("browser.visited_color"); if (!colorStr.IsEmpty()) { mVisitedLinkColor = MakeColorPref(colorStr); } mUseFocusColors = Preferences::GetBool("browser.display.use_focus_colors", mUseFocusColors); mFocusTextColor = mDefaultColor; mFocusBackgroundColor = mBackgroundColor; colorStr = Preferences::GetString("browser.display.focus_text_color"); if (!colorStr.IsEmpty()) { mFocusTextColor = MakeColorPref(colorStr); } colorStr = Preferences::GetString("browser.display.focus_background_color"); if (!colorStr.IsEmpty()) { mFocusBackgroundColor = MakeColorPref(colorStr); } mFocusRingWidth = Preferences::GetInt("browser.display.focus_ring_width", mFocusRingWidth); mFocusRingOnAnything = Preferences::GetBool("browser.display.focus_ring_on_anything", mFocusRingOnAnything); mFocusRingStyle = Preferences::GetInt("browser.display.focus_ring_style", mFocusRingStyle); mBodyTextColor = mDefaultColor; // * use fonts? mUseDocumentFonts = Preferences::GetInt("browser.display.use_document_fonts") != 0; // * replace backslashes with Yen signs? (bug 245770) mEnableJapaneseTransform = Preferences::GetBool("layout.enable_japanese_specific_transform"); mPrefScrollbarSide = Preferences::GetInt("layout.scrollbar.side"); GetFontPreferences(); // * image animation const nsAdoptingCString& animatePref = Preferences::GetCString("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 = Preferences::GetInt(IBMBIDI_TEXTDIRECTION_STR, GET_BIDI_OPTION_DIRECTION(bidiOptions)); SET_BIDI_OPTION_DIRECTION(bidiOptions, prefInt); mPrefBidiDirection = prefInt; prefInt = Preferences::GetInt(IBMBIDI_TEXTTYPE_STR, GET_BIDI_OPTION_TEXTTYPE(bidiOptions)); SET_BIDI_OPTION_TEXTTYPE(bidiOptions, prefInt); prefInt = Preferences::GetInt(IBMBIDI_NUMERAL_STR, GET_BIDI_OPTION_NUMERAL(bidiOptions)); SET_BIDI_OPTION_NUMERAL(bidiOptions, prefInt); prefInt = Preferences::GetInt(IBMBIDI_SUPPORTMODE_STR, GET_BIDI_OPTION_SUPPORT(bidiOptions)); SET_BIDI_OPTION_SUPPORT(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, false); } void nsPresContext::InvalidateThebesLayers() { if (!mShell) return; nsIFrame* rootFrame = mShell->FrameManager()->GetRootFrame(); if (rootFrame) { // FrameLayerBuilder caches invalidation-related values that depend on the // appunits-per-dev-pixel ratio, so ensure that all ThebesLayer drawing // is completely flushed. FrameLayerBuilder::InvalidateThebesLayersInSubtree(rootFrame); } } void nsPresContext::AppUnitsPerDevPixelChanged() { InvalidateThebesLayers(); mDeviceContext->FlushFontCache(); // All cached style data must be recomputed. if (HasCachedStyleData()) { MediaFeatureValuesChanged(true); RebuildAllStyleData(NS_STYLE_HINT_REFLOW); } } 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) { // 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); AppUnitsPerDevPixelChanged(); } 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 = true; } if (StringBeginsWith(prefName, NS_LITERAL_CSTRING("bidi."))) { // Changes to bidi prefs need to trigger a reflow (see bug 443629) mPrefChangePendingNeedsReflow = 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 = 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 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(true); } InvalidateThebesLayers(); mDeviceContext->FlushFontCache(); nsChangeHint hint = nsChangeHint(0); if (mPrefChangePendingNeedsReflow) { NS_UpdateHint(hint, NS_STYLE_HINT_REFLOW); } RebuildAllStyleData(hint); } nsresult nsPresContext::Init(nsDeviceContext* 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; mEventManager = new nsEventStateManager(); NS_ADDREF(mEventManager); mTransitionManager = new nsTransitionManager(this); mAnimationManager = new nsAnimationManager(this); 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 ourContainer = mDocument->GetContainer(); nsCOMPtr ourItem = do_QueryInterface(ourContainer); if (ourItem) { nsCOMPtr parentItem; ourItem->GetSameTypeParent(getter_AddRefs(parentItem)); if (parentItem) { mRefreshDriver = parent->GetShell()->GetPresContext()->RefreshDriver(); } } } if (!mRefreshDriver) { mRefreshDriver = new nsRefreshDriver(this); } } mLangService = do_GetService(NS_LANGUAGEATOMSERVICE_CONTRACTID); // Register callbacks so we're notified when the preferences change Preferences::RegisterCallback(nsPresContext::PrefChangedCallback, "font.", this); Preferences::RegisterCallback(nsPresContext::PrefChangedCallback, "browser.display.", this); Preferences::RegisterCallback(nsPresContext::PrefChangedCallback, "browser.underline_anchors", this); Preferences::RegisterCallback(nsPresContext::PrefChangedCallback, "browser.anchor_color", this); Preferences::RegisterCallback(nsPresContext::PrefChangedCallback, "browser.active_color", this); Preferences::RegisterCallback(nsPresContext::PrefChangedCallback, "browser.visited_color", this); Preferences::RegisterCallback(nsPresContext::PrefChangedCallback, "image.animation_mode", this); #ifdef IBMBIDI Preferences::RegisterCallback(nsPresContext::PrefChangedCallback, "bidi.", this); #endif Preferences::RegisterCallback(nsPresContext::PrefChangedCallback, "dom.send_after_paint_to_content", this); Preferences::RegisterCallback(nsPresContext::PrefChangedCallback, "gfx.font_rendering.", this); Preferences::RegisterCallback(nsPresContext::PrefChangedCallback, "layout.css.dpi", this); Preferences::RegisterCallback(nsPresContext::PrefChangedCallback, "layout.css.devPixelsPerPx", this); nsresult rv = mEventManager->Init(); NS_ENSURE_SUCCESS(rv, rv); mEventManager->SetPresContext(this); #ifdef DEBUG mInitialized = 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) { bool isChrome = false; bool isRes = 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 { if (mTransitionManager) { mTransitionManager->Disconnect(); mTransitionManager = nsnull; } if (mAnimationManager) { mAnimationManager->Disconnect(); mAnimationManager = nsnull; } } } void nsPresContext::DestroyImageLoaders() { // Destroy image loaders. This is important to do when frames are being // destroyed because 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(); } } 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 (mLanguage == nsGkAtoms::Unicode) { NS_RELEASE(mLanguage); NS_IF_ADDREF(mLanguage = mLangService->GetLocaleLanguage()); } GetFontPreferences(); } #ifdef IBMBIDI //ahmed switch (GET_BIDI_OPTION_TEXTTYPE(GetBidi())) { case IBMBIDI_TEXTTYPE_LOGICAL: SetVisualMode(false); break; case IBMBIDI_TEXTTYPE_VISUAL: SetVisualMode(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(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 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& 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 imgContent(do_QueryInterface(aParent)); if (imgContent) { nsCOMPtr 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); } } 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; } } } 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); } SetSMILAnimations(doc, aMode, mImageAnimationMode); } } mImageAnimationMode = aMode; } void nsPresContext::SetImageAnimationModeExternal(PRUint16 aMode) { SetImageAnimationModeInternal(aMode); } 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); mDeviceContext->SetPixelScale(aZoom); NS_ASSERTION(!mSupressResizeReflow, "two zooms happening at the same time? impossible!"); mSupressResizeReflow = true; mFullZoom = aZoom; mShell->GetViewManager()-> SetWindowDimensions(NSToCoordRound(oldWidthDevPixels * AppUnitsPerDevPixel()), NSToCoordRound(oldHeightDevPixels * AppUnitsPerDevPixel())); AppUnitsPerDevPixelChanged(); mSupressResizeReflow = 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 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 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) { // We get called the first time we try to draw a border-image, and // also when the border image changes (including when it changes from // non-null to null). imgIRequest *borderImage = aStyleBorder->GetBorderImage(); if (!borderImage) { SetImageLoaders(aFrame, BORDER_IMAGE, nsnull); return; } PRUint32 actions = nsImageLoader::ACTION_REDRAW_ON_LOAD; if (aStyleBorder->ImageBorderDiffers()) actions |= nsImageLoader::ACTION_REFLOW_ON_LOAD; nsRefPtr loader = nsImageLoader::Create(aFrame, borderImage, 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 nsPresContext::GetContainerInternal() const { nsISupports *result = nsnull; if (mContainer) CallQueryReferent(mContainer.get(), &result); return result; } already_AddRefed nsPresContext::GetContainerExternal() const { return GetContainerInternal(); } #ifdef IBMBIDI void nsPresContext::SetBidiEnabled() const { if (mShell) { nsIDocument *doc = mShell->GetDocument(); if (doc) { doc->SetBidiEnabled(); } } } void nsPresContext::SetBidi(PRUint32 aSource, bool 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(true); } else if (IBMBIDI_TEXTTYPE_LOGICAL == GET_BIDI_OPTION_TEXTTYPE(aSource)) { SetVisualMode(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(); } #endif //IBMBIDI bool nsPresContext::IsTopLevelWindowInactive() { nsCOMPtr treeItem(do_QueryReferent(mContainer)); if (!treeItem) return false; nsCOMPtr rootItem; treeItem->GetRootTreeItem(getter_AddRefs(rootItem)); nsCOMPtr 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 = true; } return mTheme; } void nsPresContext::ThemeChanged() { if (!mPendingThemeChanged) { sLookAndFeelChanged = true; sThemeChanged = true; nsCOMPtr ev = NS_NewRunnableMethod(this, &nsPresContext::ThemeChangedInternal); if (NS_SUCCEEDED(NS_DispatchToCurrentThread(ev))) { mPendingThemeChanged = true; } } } void nsPresContext::ThemeChangedInternal() { mPendingThemeChanged = false; // Tell the theme that it changed, so it can flush any handles to stale theme // data. if (mTheme && sThemeChanged) { mTheme->ThemeChanged(); sThemeChanged = false; } // Clear all cached LookAndFeel colors. if (sLookAndFeelChanged) { LookAndFeel::Refresh(); sLookAndFeelChanged = 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(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 = true; nsCOMPtr ev = NS_NewRunnableMethod(this, &nsPresContext::SysColorChangedInternal); if (NS_SUCCEEDED(NS_DispatchToCurrentThread(ev))) { mPendingSysColorChanged = true; } } } void nsPresContext::SysColorChangedInternal() { mPendingSysColorChanged = false; if (sLookAndFeelChanged) { // Don't use the cached values for the system colors LookAndFeel::Refresh(); sLookAndFeelChanged = 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(); AnimationManager()->KeyframesListIsDirty(); 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(bool aCallerWillRebuildStyleData) { mPendingMediaFeatureValuesChanged = false; if (mShell && mShell->StyleSet()->MediumFeaturesChanged(this) && !aCallerWillRebuildStyleData) { RebuildAllStyleData(nsChangeHint(0)); } if (!nsContentUtils::IsSafeToRunScript()) { NS_ABORT_IF_FALSE(mDocument->IsBeingUsedAsImage(), "How did we get here? Are we failing to notify " "listeners that we should notify?"); return; } // Media query list listeners should be notified from a queued task // (in HTML5 terms), although we also want to notify them on certain // flushes. (We're already running off an event.) // // Note that we do this after the new style from media queries in // style sheets has been computed. if (!PR_CLIST_IS_EMPTY(&mDOMMediaQueryLists)) { // We build a list of all the notifications we're going to send // before we send any of them. (The spec says the notifications // should be a queued task, so any removals that happen during the // notifications shouldn't affect what gets notified.) Furthermore, // we hold strong pointers to everything we're going to make // notification calls to, since each notification involves calling // arbitrary script that might otherwise destroy these objects, or, // for that matter, |this|. // // Note that we intentionally send the notifications to media query // list in the order they were created and, for each list, to the // listeners in the order added. nsDOMMediaQueryList::NotifyList notifyList; for (PRCList *l = PR_LIST_HEAD(&mDOMMediaQueryLists); l != &mDOMMediaQueryLists; l = PR_NEXT_LINK(l)) { nsDOMMediaQueryList *mql = static_cast(l); mql->MediumFeaturesChanged(notifyList); } if (!notifyList.IsEmpty()) { nsPIDOMWindow *win = mDocument->GetInnerWindow(); nsCOMPtr et = do_QueryInterface(win); nsCxPusher pusher; for (PRUint32 i = 0, i_end = notifyList.Length(); i != i_end; ++i) { if (pusher.RePush(et)) { nsDOMMediaQueryList::HandleChangeData &d = notifyList[i]; d.listener->HandleChange(d.mql); } } } // NOTE: When |notifyList| goes out of scope, our destructor could run. } } void nsPresContext::PostMediaFeatureValuesChangedEvent() { // FIXME: We should probably replace this event with use of // nsRefreshDriver::AddStyleFlushObserver (except the pres shell would // need to track whether it's been added). if (!mPendingMediaFeatureValuesChanged) { nsCOMPtr ev = NS_NewRunnableMethod(this, &nsPresContext::HandleMediaFeatureValuesChangedEvent); if (NS_SUCCEEDED(NS_DispatchToCurrentThread(ev))) { mPendingMediaFeatureValuesChanged = 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(false); } } void nsPresContext::MatchMedia(const nsAString& aMediaQueryList, nsIDOMMediaQueryList** aResult) { nsRefPtr result = new nsDOMMediaQueryList(this, aMediaQueryList); // Insert the new item at the end of the linked list. PR_INSERT_BEFORE(result, &mDOMMediaQueryLists); result.forget(aResult); } void nsPresContext::SetPaginatedScrolling(bool aPaginated) { if (mType == eContext_PrintPreview || mType == eContext_PageLayout) mCanPaginatedScroll = aPaginated; } void nsPresContext::SetPrintSettings(nsIPrintSettings *aPrintSettings) { if (mMedium == nsGkAtoms::print) mPrintSettings = aPrintSettings; } bool nsPresContext::EnsureVisible() { nsCOMPtr docShell(do_QueryReferent(mContainer)); if (docShell) { nsCOMPtr cv; docShell->GetContentViewer(getter_AddRefs(cv)); // Make sure this is the content viewer we belong with if (cv) { nsRefPtr currentPresContext; cv->GetPresContext(getter_AddRefs(currentPresContext)); if (currentPresContext == this) { // OK, this is us. We want to call Show() on the content viewer. cv->Show(); return true; } } } return false; } #ifdef MOZ_REFLOW_PERF void nsPresContext::CountReflows(const char * aName, nsIFrame * aFrame) { if (mShell) { mShell->CountReflows(aName, aFrame); } } #endif bool nsPresContext::IsChromeSlow() const { bool isChrome = false; nsCOMPtr container = GetContainer(); if (container) { nsresult result; nsCOMPtr 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 = true; return mIsChrome; } void nsPresContext::InvalidateIsChromeCacheExternal() { InvalidateIsChromeCacheInternal(); } /* virtual */ bool nsPresContext::HasAuthorSpecifiedRules(nsIFrame *aFrame, PRUint32 ruleTypeMask) const { return nsRuleNode::HasAuthorSpecifiedRules(aFrame->GetStyleContext(), ruleTypeMask, UseDocumentColors()); } 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 bool userFontSetGottenBefore = mGetUserFontSetCalled; #endif // Set mGetUserFontSetCalled up front, so that FlushUserFontSet will actually // flush. mGetUserFontSetCalled = 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()) { nsTArray rules; if (!mShell->StyleSet()->AppendFontFaceRules(this, rules)) { if (mUserFontSet) { mUserFontSet->Destroy(); NS_RELEASE(mUserFontSet); } return; } bool changed = false; if (rules.Length() == 0) { if (mUserFontSet) { mUserFontSet->Destroy(); NS_RELEASE(mUserFontSet); changed = true; } } else { if (!mUserFontSet) { mUserFontSet = new nsUserFontSet(this); NS_ADDREF(mUserFontSet); } changed = mUserFontSet->UpdateRules(rules); } // We need to enqueue a style change reflow (for later) to // reflect that we're modifying @font-face rules. (However, // without a reflow, nothing will happen to start any downloads // that are needed.) if (changed) { UserFontSetUpdated(); } } mUserFontSetDirty = 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 = 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 ev = NS_NewRunnableMethod(this, &nsPresContext::HandleRebuildUserFontSet); if (NS_SUCCEEDED(NS_DispatchToCurrentThread(ev))) { mPostedFlushUserFontSet = 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); } bool nsPresContext::EnsureSafeToHandOutCSSRules() { nsCSSStyleSheet::EnsureUniqueInnerResult res = mShell->StyleSet()->EnsureUniqueInnerOnCSSSheets(); if (res == nsCSSStyleSheet::eUniqueInner_AlreadyUnique) { // Nothing to do. return true; } if (res == nsCSSStyleSheet::eUniqueInner_CloneFailed) { return false; } NS_ABORT_IF_FALSE(res == nsCSSStyleSheet::eUniqueInner_ClonedInner, "unexpected result"); RebuildAllStyleData(nsChangeHint(0)); return true; } void nsPresContext::FireDOMPaintEvent() { nsPIDOMWindow* ourWindow = mDocument->GetWindow(); if (!ourWindow) return; nsCOMPtr dispatchTarget = do_QueryInterface(ourWindow); nsCOMPtr eventTarget = dispatchTarget; if (!IsChrome()) { bool notifyContent = mSendAfterPaintToContent; if (notifyContent) { // If the pref is set, we still don't post events when they're // entirely cross-doc. notifyContent = false; for (PRUint32 i = 0; i < mInvalidateRequests.mRequests.Length(); ++i) { if (!(mInvalidateRequests.mRequests[i].mFlags & nsIFrame::INVALIDATE_CROSS_DOC)) { notifyContent = 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 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 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(true); nsEventDispatcher::DispatchDOMEvent(dispatchTarget, nsnull, event, this, nsnull); } static bool MayHavePaintEventListener(nsPIDOMWindow* aInnerWindow) { if (!aInnerWindow) return false; if (aInnerWindow->HasPaintEventListeners()) return true; nsIDOMEventTarget* parentTarget = aInnerWindow->GetParentTarget(); if (!parentTarget) return false; nsEventListenerManager* manager = nsnull; if ((manager = parentTarget->GetListenerManager(false)) && manager->MayHavePaintEventListener()) { return true; } nsCOMPtr node; if (parentTarget != aInnerWindow->GetChromeEventHandler()) { nsCOMPtr mm = do_QueryInterface(parentTarget); if (mm) { node = mm->GetOwnerContent(); } } if (!node) { node = do_QueryInterface(parentTarget); } if (node) return MayHavePaintEventListener(node->OwnerDoc()->GetInnerWindow()); nsCOMPtr window = do_QueryInterface(parentTarget); if (window) return MayHavePaintEventListener(window); nsCOMPtr root = do_QueryInterface(parentTarget); nsIDOMEventTarget* tabChildGlobal; return root && (tabChildGlobal = root->GetParentTarget()) && (manager = tabChildGlobal->GetListenerManager(false)) && manager->MayHavePaintEventListener(); } bool 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 = 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 bool NotifyDidPaintSubdocumentCallback(nsIDocument* aDocument, void* aData) { nsIPresShell* shell = aDocument->GetShell(); if (shell) { nsPresContext* pc = shell->GetPresContext(); if (pc) { pc->NotifyDidPaintForSubtree(); } } return true; } void nsPresContext::NotifyDidPaintForSubtree() { if (!mFireAfterPaintEvents) return; mFireAfterPaintEvents = false; if (IsRoot()) { static_cast(this)->CancelDidPaintTimer(); } if (!mInvalidateRequests.mRequests.IsEmpty()) { nsCOMPtr ev = NS_NewRunnableMethod(this, &nsPresContext::FireDOMPaintEvent); nsContentUtils::AddScriptRunner(ev); } mDocument->EnumerateSubDocuments(NotifyDidPaintSubdocumentCallback, nsnull); } bool nsPresContext::HasCachedStyleData() { return mShell && mShell->StyleSet()->HasCachedStyleData(); } static bool sGotInterruptEnv = 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. Can't be initialized here, // because TimeDuration/TimeStamp is not safe to use in static constructors.. static TimeDuration sInterruptTimeout; 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"); int duration_ms = ev ? atoi(ev) : 100; sInterruptTimeout = TimeDuration::FromMilliseconds(duration_ms); } bool nsPresContext::HavePendingInputEvent() { switch (sInterruptMode) { #ifndef XP_WIN case ModeRandom: return (random() & 1); #endif case ModeCounter: if (sInterruptCounter < sInterruptMaxCounter) { ++sInterruptCounter; return false; } sInterruptCounter = 0; return true; default: case ModeEvent: { nsIFrame* f = PresShell()->GetRootFrame(); if (f) { nsIWidget* w = f->GetNearestWidget(); if (w) { return w->HasPendingInputEvent(); } } return false; } } } void nsPresContext::ReflowStarted(bool 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 = false; mInterruptChecksToSkip = sInterruptChecksToSkip; if (mInterruptsEnabled) { mReflowStartTime = TimeStamp::Now(); } } bool nsPresContext::CheckForInterrupt(nsIFrame* aFrame) { if (mHasPendingInterrupt) { mShell->FrameNeedsToContinueReflow(aFrame); return true; } if (!sGotInterruptEnv) { sGotInterruptEnv = true; GetInterruptEnv(); } if (!mInterruptsEnabled) { return false; } if (mInterruptChecksToSkip > 0) { --mInterruptChecksToSkip; return 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; } bool 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 false; } if (IsChrome()) { return false; } // We may not have a root frame, so use views. nsIView* view = PresShell()->GetViewManager()->GetRootView(); if (!view) { return false; } view = view->GetParent(); // anonymous inner view if (!view) { return true; } view = view->GetParent(); // subdocumentframe's view if (!view) { return true; } nsIFrame* f = static_cast(view->GetClientData()); return (f && f->PresContext()->IsChrome()); } nsRootPresContext::nsRootPresContext(nsIDocument* aDocument, nsPresContextType aType) : nsPresContext(aDocument, aType), mUpdatePluginGeometryForFrame(nsnull), mDOMGeneration(0), mNeedsToUpdatePluginGeometry(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 > mAffectedPlugins; nsRect mAffectedPluginBounds; nsTArray* mOutputConfigurations; }; static PLDHashOperator PluginBoundsEnumerator(nsPtrHashKey* aEntry, void* userArg) { PluginGeometryClosure* closure = static_cast(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* aEntry, void* userArg) { PluginGeometryClosure* closure = static_cast(userArg); nsObjectFrame* f = aEntry->GetKey(); f->GetEmptyClipConfiguration(closure->mOutputConfigurations); return PL_DHASH_NEXT; } static void RecoverPluginGeometry(nsDisplayListBuilder* aBuilder, nsDisplayList* aList, bool aInTransform, PluginGeometryClosure* aClosure) { for (nsDisplayItem* i = aList->GetBottom(); i; i = i->GetAbove()) { switch (i->GetType()) { case nsDisplayItem::TYPE_PLUGIN: { nsDisplayPlugin* displayPlugin = static_cast(i); nsObjectFrame* f = static_cast( 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* entry = aClosure->mAffectedPlugins.GetEntry(f); // Windowed plugins in transforms are always ignored, we don't // create configurations for them if (entry && (!aInTransform || !f->GetWidget())) { displayPlugin->GetWidgetConfiguration(aBuilder, aClosure->mOutputConfigurations); // we've dealt with this plugin now aClosure->mAffectedPlugins.RawRemoveEntry(entry); } break; } case nsDisplayItem::TYPE_TRANSFORM: { nsDisplayList* sublist = static_cast(i)->GetStoredList()->GetList(); RecoverPluginGeometry(aBuilder, sublist, true, aClosure); break; } default: { nsDisplayList* sublist = i->GetList(); if (sublist) { RecoverPluginGeometry(aBuilder, sublist, aInTransform, aClosure); } break; } } } } #ifdef DEBUG #include static bool gDumpPluginList = false; #endif void nsRootPresContext::GetPluginGeometryUpdates(nsIFrame* aChangedSubtree, nsTArray* 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, 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, false, &closure); list.DeleteAll(); } // Plugins that we didn't find in the display list are not visible closure.mAffectedPlugins.EnumerateEntries(PluginHideEnumerator, &closure); } static bool HasOverlap(const nsIntPoint& aOffset1, const nsTArray& aClipRects1, const nsIntPoint& aOffset2, const nsTArray& 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 true; } } return 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* aConfigurations) { if (aConfigurations->Length() > 10) { // Give up, we don't want to get bogged down here return; } nsTArray 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]; bool foundOverlap = false; for (PRUint32 j = 0; j < pluginsToMove.Length(); ++j) { if (i == j) continue; nsIntRect bounds; pluginsToMove[j].mChild->GetBounds(bounds); nsAutoTArray clipRects; pluginsToMove[j].mChild->GetWindowClipRegion(&clipRects); if (HasOverlap(bounds.TopLeft(), clipRects, config->mBounds.TopLeft(), config->mClipRegion)) { foundOverlap = 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 = false; nsIFrame* f = mUpdatePluginGeometryForFrame; if (f) { mUpdatePluginGeometryForFrame->PresContext()-> SetContainsUpdatePluginGeometryFrame(false); mUpdatePluginGeometryForFrame = nsnull; } else { f = FrameManager()->GetRootFrame(); } nsTArray 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 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), 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 = 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 event = NS_NewRunnableMethod(this, &nsRootPresContext::SynchronousPluginGeometryUpdate); NS_DispatchToMainThread(event); mUpdatePluginGeometryForFrame = aFrame; mUpdatePluginGeometryForFrame->PresContext()-> SetContainsUpdatePluginGeometryFrame(true); } else { if (!mUpdatePluginGeometryForFrame || aFrame == mUpdatePluginGeometryForFrame) return; mUpdatePluginGeometryForFrame->PresContext()-> SetContainsUpdatePluginGeometryFrame(false); mUpdatePluginGeometryForFrame = nsnull; } } static PLDHashOperator PluginDidSetGeometryEnumerator(nsPtrHashKey* 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(false); mUpdatePluginGeometryForFrame = nsnull; } } void nsRootPresContext::RootForgetUpdatePluginGeometryFrameForPresContext( nsPresContext* aPresContext) { if (aPresContext->GetContainsUpdatePluginGeometryFrame()) { aPresContext->SetContainsUpdatePluginGeometryFrame(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); } void nsRootPresContext::AddWillPaintObserver(nsIRunnable* aRunnable) { if (!mWillPaintFallbackEvent.IsPending()) { mWillPaintFallbackEvent = new RunWillPaintObservers(this); NS_DispatchToMainThread(mWillPaintFallbackEvent.get()); } mWillPaintObservers.AppendElement(aRunnable); } /** * Run all runnables that need to get called before the next paint. */ void nsRootPresContext::FlushWillPaintObservers() { mWillPaintFallbackEvent = nsnull; nsTArray > observers; observers.SwapElements(mWillPaintObservers); for (PRUint32 i = 0; i < observers.Length(); ++i) { observers[i]->Run(); } }