/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ /* ***** BEGIN LICENSE BLOCK ***** * Version: MPL 1.1/GPL 2.0/LGPL 2.1 * * The contents of this file are subject to the Mozilla Public License Version * 1.1 (the "License"); you may not use this file except in compliance with * the License. You may obtain a copy of the License at * http://www.mozilla.org/MPL/ * * Software distributed under the License is distributed on an "AS IS" basis, * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License * for the specific language governing rights and limitations under the * License. * * The Original Code is mozilla.org code. * * The Initial Developer of the Original Code is * Netscape Communications Corporation. * Portions created by the Initial Developer are Copyright (C) 1998 * the Initial Developer. All Rights Reserved. * * Contributor(s): * * Alternatively, the contents of this file may be used under the terms of * either of the GNU General Public License Version 2 or later (the "GPL"), * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"), * in which case the provisions of the GPL or the LGPL are applicable instead * of those above. If you wish to allow use of your version of this file only * under the terms of either the GPL or the LGPL, and not to allow others to * use your version of this file under the terms of the MPL, indicate your * decision by deleting the provisions above and replace them with the notice * and other provisions required by the GPL or the LGPL. If you do not delete * the provisions above, a recipient may use your version of this file under * the terms of any one of the MPL, the GPL or the LGPL. * * ***** END LICENSE BLOCK ***** */ #include "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 "nsIFocusController.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 "nsLayoutAtoms.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" #ifdef IBMBIDI #include "nsBidiPresUtils.h" #endif // IBMBIDI #include "nsContentUtils.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 "nsISelectionImageService.h" 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 PR_CALLBACK 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 PR_STATIC_CALLBACK(PRBool) destroy_loads(nsHashKey *aKey, void *aData, void* closure) { nsISupports *sup = NS_REINTERPRET_CAST(nsISupports*, aData); nsImageLoader *loader = NS_REINTERPRET_CAST(nsImageLoader*, sup); loader->Destroy(); return PR_TRUE; } static NS_DEFINE_CID(kLookAndFeelCID, NS_LOOKANDFEEL_CID); #include "nsContentCID.h" static NS_DEFINE_CID(kSelectionImageService, NS_SELECTIONIMAGESERVICE_CID); // NOTE! nsPresContext::operator new() zeroes out all members, so don't // bother initializing members to 0. nsPresContext::nsPresContext(nsPresContextType aType) : mType(aType), mTextZoom(1.0), mViewportStyleOverflow(NS_STYLE_OVERFLOW_AUTO, NS_STYLE_OVERFLOW_AUTO), mCompatibilityMode(eCompatibility_FullStandards), mImageAnimationModePref(imgIContainer::kNormalAnimMode), mDefaultVariableFont("serif", NS_FONT_STYLE_NORMAL, NS_FONT_VARIANT_NORMAL, NS_FONT_WEIGHT_NORMAL, 0, NSIntPointsToTwips(12)), mDefaultFixedFont("monospace", NS_FONT_STYLE_NORMAL, NS_FONT_VARIANT_NORMAL, NS_FONT_WEIGHT_NORMAL, 0, NSIntPointsToTwips(10)), mDefaultSerifFont("serif", NS_FONT_STYLE_NORMAL, NS_FONT_VARIANT_NORMAL, NS_FONT_WEIGHT_NORMAL, 0, NSIntPointsToTwips(12)), mDefaultSansSerifFont("sans-serif", NS_FONT_STYLE_NORMAL, NS_FONT_VARIANT_NORMAL, NS_FONT_WEIGHT_NORMAL, 0, NSIntPointsToTwips(12)), mDefaultMonospaceFont("monospace", NS_FONT_STYLE_NORMAL, NS_FONT_VARIANT_NORMAL, NS_FONT_WEIGHT_NORMAL, 0, NSIntPointsToTwips(10)), mDefaultCursiveFont("cursive", NS_FONT_STYLE_NORMAL, NS_FONT_VARIANT_NORMAL, NS_FONT_WEIGHT_NORMAL, 0, NSIntPointsToTwips(12)), mDefaultFantasyFont("fantasy", NS_FONT_STYLE_NORMAL, NS_FONT_VARIANT_NORMAL, NS_FONT_WEIGHT_NORMAL, 0, NSIntPointsToTwips(12)) { // 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; mFocusTextColor = mDefaultColor; mFocusBackgroundColor = mBackgroundColor; mFocusRingWidth = 1; mLanguageSpecificTransformType = eLanguageSpecificTransformType_Unknown; if (aType == eContext_Galley) { mMedium = nsLayoutAtoms::screen; mImageAnimationMode = imgIContainer::kNormalAnimMode; } else { SetBackgroundImageDraw(PR_FALSE); SetBackgroundColorDraw(PR_FALSE); mImageAnimationMode = imgIContainer::kDontAnimMode; mNeverAnimate = PR_TRUE; mMedium = nsLayoutAtoms::print; mPaginated = PR_TRUE; if (aType == eContext_PrintPreview) { mCanPaginatedScroll = PR_TRUE; mPageDim.SetRect(-1, -1, -1, -1); } else { mPageDim.SetRect(0, 0, 0, 0); } } } nsPresContext::~nsPresContext() { mImageLoaders.Enumerate(destroy_loads); NS_PRECONDITION(!mShell, "Presshell forgot to clear our mShell pointer"); SetShell(nsnull); if (mEventManager) { mEventManager->SetPresContext(nsnull); // unclear if this is needed, but can't hurt 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); delete mBidiUtils; #endif // IBMBIDI NS_IF_RELEASE(mDeviceContext); NS_IF_RELEASE(mLookAndFeel); NS_IF_RELEASE(mLangGroup); } NS_IMPL_ISUPPORTS1(nsPresContext, nsIObserver) #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." }; void nsPresContext::GetFontPreferences() { if (!mLangGroup) return; /* 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 */ float p2t = ScaledPixelsToTwips(); mDefaultVariableFont.size = NSFloatPixelsToTwips((float)16, p2t); mDefaultFixedFont.size = NSFloatPixelsToTwips((float)13, p2t); const char *langGroup; mLangGroup->GetUTF8String(&langGroup); 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 (size > 0) { if (unit == eUnit_px) { mMinimumFontSize = NSFloatPixelsToTwips((float)size, p2t); } else if (unit == eUnit_pt) { mMinimumFontSize = NSIntPointsToTwips(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 = NSFloatPixelsToTwips((float)size, p2t); } else if (unit == eUnit_pt) { font->size = NSIntPointsToTwips(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 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); } 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); // * document colors GetDocumentColorPreferences(); // * 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); // * 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"); 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; #ifdef IBMBIDI PRUint32 bidiOptions = GetBidi(); PRInt32 prefInt = nsContentUtils::GetIntPref("bidi.direction", GET_BIDI_OPTION_DIRECTION(bidiOptions)); SET_BIDI_OPTION_DIRECTION(bidiOptions, prefInt); prefInt = nsContentUtils::GetIntPref("bidi.texttype", GET_BIDI_OPTION_TEXTTYPE(bidiOptions)); SET_BIDI_OPTION_TEXTTYPE(bidiOptions, prefInt); prefInt = nsContentUtils::GetIntPref("bidi.controlstextmode", GET_BIDI_OPTION_CONTROLSTEXTMODE(bidiOptions)); SET_BIDI_OPTION_CONTROLSTEXTMODE(bidiOptions, prefInt); prefInt = nsContentUtils::GetIntPref("bidi.numeral", GET_BIDI_OPTION_NUMERAL(bidiOptions)); SET_BIDI_OPTION_NUMERAL(bidiOptions, prefInt); prefInt = nsContentUtils::GetIntPref("bidi.support", GET_BIDI_OPTION_SUPPORT(bidiOptions)); SET_BIDI_OPTION_SUPPORT(bidiOptions, prefInt); prefInt = nsContentUtils::GetIntPref("bidi.characterset", 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); #endif } void nsPresContext::ClearStyleDataAndReflow() { if (mShell) { // Clear out all our style data. mShell->StyleSet()->ClearStyleData(this); // Force a reflow of the root frame // XXX We really should only do a reflow if a preference that affects // formatting changed, e.g., a font change. If it's just a color change // then we only need to repaint... mShell->StyleChangeReflow(); } } void nsPresContext::PreferenceChanged(const char* aPrefName) { // 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(PR_TRUE); } mDeviceContext->FlushFontCache(); ClearStyleDataAndReflow(); } nsresult nsPresContext::Init(nsIDeviceContext* aDeviceContext) { NS_ASSERTION(!(mInitialized == PR_TRUE), "attempt to reinit pres context"); NS_ENSURE_ARG(aDeviceContext); mDeviceContext = aDeviceContext; NS_ADDREF(mDeviceContext); // 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); 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 rv = mEventManager->Init(); NS_ENSURE_SUCCESS(rv, rv); mEventManager->SetPresContext(this); #ifdef DEBUG mInitialized = PR_TRUE; #endif float pixelsToTwips = ScaledPixelsToTwips(); mBorderWidthTable[NS_STYLE_BORDER_WIDTH_THIN] = NSIntPixelsToTwips(1, pixelsToTwips); mBorderWidthTable[NS_STYLE_BORDER_WIDTH_MEDIUM] = NSIntPixelsToTwips(3, pixelsToTwips); mBorderWidthTable[NS_STYLE_BORDER_WIDTH_THICK] = NSIntPixelsToTwips(5, pixelsToTwips); 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 (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) { // Initialize our state from the user preferences, now that we // have a presshell, and hence a document. GetUserPreferences(); nsIDocument *doc = mShell->GetDocument(); NS_ASSERTION(doc, "expect document here"); if (doc) { nsIURI *baseURI = doc->GetBaseURI(); if (mMedium != nsLayoutAtoms::print && baseURI) { PRBool isChrome = PR_FALSE; PRBool isRes = PR_FALSE; baseURI->SchemeIs("chrome", &isChrome); baseURI->SchemeIs("resource", &isRes); if (!isChrome && !isRes) mImageAnimationMode = mImageAnimationModePref; else mImageAnimationMode = imgIContainer::kNormalAnimMode; } if (mLangService) { doc->AddCharSetObserver(this); UpdateCharSet(doc->GetDocumentCharacterSet()); } } } } void nsPresContext::UpdateCharSet(const nsAFlatCString& aCharSet) { if (mLangService) { NS_IF_RELEASE(mLangGroup); mLangGroup = mLangService->LookupCharSet(aCharSet.get()).get(); // addrefs if (mLangGroup == nsLayoutAtoms::Japanese && mEnableJapaneseTransform) { mLanguageSpecificTransformType = eLanguageSpecificTransformType_Japanese; } else { mLanguageSpecificTransformType = eLanguageSpecificTransformType_None; } // bug 39570: moved from nsLanguageAtomService::LookupCharSet() #if !defined(XP_BEOS) if (mLangGroup == nsLayoutAtoms::Unicode) { NS_RELEASE(mLangGroup); NS_IF_ADDREF(mLangGroup = mLangService->GetLocaleLanguageGroup()); } #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(); ClearStyleDataAndReflow(); return NS_OK; } NS_WARNING("unrecognized topic in nsPresContext::Observe"); return NS_ERROR_FAILURE; } void nsPresContext::SetCompatibilityMode(nsCompatibility aMode) { mCompatibilityMode = aMode; if (!mShell) return; // enable/disable the QuirkSheet mShell->StyleSet()-> EnableQuirkStyleSheet(mCompatibilityMode == 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 PR_STATIC_CALLBACK(PRBool) set_animation_mode(nsHashKey *aKey, void *aData, void* closure) { nsISupports *sup = NS_REINTERPRET_CAST(nsISupports*, aData); nsImageLoader *loader = NS_REINTERPRET_CAST(nsImageLoader*, sup); imgIRequest* imgReq = loader->GetRequest(); SetImgAnimModeOnImgReq(imgReq, (PRUint16)NS_PTR_TO_INT32(closure)); return PR_TRUE; } // 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::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 (mMedium == nsLayoutAtoms::print) return; // This hash table contains a list of background images // so iterate over it and set the mode mImageLoaders.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) { nsIContent *rootContent = doc->GetRootContent(); if (rootContent) { SetImgAnimations(rootContent, aMode); } } } mImageAnimationMode = aMode; } void nsPresContext::SetImageAnimationModeExternal(PRUint16 aMode) { SetImageAnimationModeInternal(aMode); } already_AddRefed nsPresContext::GetMetricsForInternal(const nsFont& aFont) { nsIFontMetrics* metrics = nsnull; mDeviceContext->GetMetricsFor(aFont, mLangGroup, metrics); return metrics; } already_AddRefed nsPresContext::GetMetricsForExternal(const nsFont& aFont) { return GetMetricsForInternal(aFont); } const nsFont* nsPresContext::GetDefaultFontInternal(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; } const nsFont* nsPresContext::GetDefaultFontExternal(PRUint8 aFontID) const { return GetDefaultFontInternal(aFontID); } float nsPresContext::TwipsToPixelsForFonts() const { float app2dev; #ifdef NS_PRINT_PREVIEW // If an alternative DC is available we want to use // it to get the scaling factor for fonts. Usually, the AltDC // is a printing DC so therefore we need to get the printers // scaling values for calculating the font heights nsCOMPtr altDC; mDeviceContext->GetAltDevice(getter_AddRefs(altDC)); if (altDC) { app2dev = altDC->AppUnitsToDevUnits(); } else { app2dev = mDeviceContext->AppUnitsToDevUnits(); } #else app2dev = mDeviceContext->AppUnitsToDevUnits(); #endif return app2dev; } float nsPresContext::ScaledPixelsToTwips() const { float scale; float p2t; p2t = mDeviceContext->DevUnitsToAppUnits(); if (mDoScaledTwips) { mDeviceContext->GetCanonicalPixelScale(scale); scale = p2t * scale; } else { scale = p2t; } return scale; } void nsPresContext::SetTextZoomExternal(float aZoom) { SetTextZoomInternal(aZoom); } imgIRequest* nsPresContext::LoadImage(imgIRequest* aImage, nsIFrame* aTargetFrame) { // look and see if we have a loader for the target frame. nsVoidKey key(aTargetFrame); nsImageLoader *loader = NS_REINTERPRET_CAST(nsImageLoader*, mImageLoaders.Get(&key)); // addrefs if (!loader) { loader = new nsImageLoader(); if (!loader) return nsnull; NS_ADDREF(loader); // new loader->Init(aTargetFrame, this); mImageLoaders.Put(&key, loader); } loader->Load(aImage); imgIRequest *request = loader->GetRequest(); NS_RELEASE(loader); return request; } void nsPresContext::StopImagesFor(nsIFrame* aTargetFrame) { nsVoidKey key(aTargetFrame); nsImageLoader *loader = NS_REINTERPRET_CAST(nsImageLoader*, mImageLoaders.Get(&key)); // addrefs if (loader) { loader->Destroy(); NS_RELEASE(loader); mImageLoaders.Remove(&key); } } void nsPresContext::SetContainer(nsISupports* aHandler) { mContainer = do_GetWeakReference(aHandler); if (mContainer) { GetDocumentColorPreferences(); } } already_AddRefed nsPresContext::GetContainerInternal() { nsISupports *result; if (mContainer) CallQueryReferent(mContainer.get(), &result); else result = nsnull; return result; } already_AddRefed nsPresContext::GetContainerExternal() { return GetContainerInternal(); } #ifdef IBMBIDI PRBool nsPresContext::BidiEnabledInternal() const { PRBool bidiEnabled = PR_FALSE; NS_ASSERTION(mShell, "PresShell must be set on PresContext before calling nsPresContext::GetBidiEnabled"); if (mShell) { nsIDocument *doc = mShell->GetDocument(); NS_ASSERTION(doc, "PresShell has no document in nsPresContext::GetBidiEnabled"); if (doc) { bidiEnabled = doc->GetBidiEnabled(); } } return bidiEnabled; } PRBool nsPresContext::BidiEnabledExternal() const { return BidiEnabledInternal(); } void nsPresContext::SetBidiEnabled(PRBool aBidiEnabled) const { if (mShell) { nsIDocument *doc = mShell->GetDocument(); if (doc) { doc->SetBidiEnabled(aBidiEnabled); } } } nsBidiPresUtils* nsPresContext::GetBidiUtils() { if (!mBidiUtils) mBidiUtils = new nsBidiPresUtils; return mBidiUtils; } void nsPresContext::SetBidi(PRUint32 aSource, PRBool aForceReflow) { // Don't do all this stuff unless the options have changed. if (aSource == GetBidi()) { return; } NS_ASSERTION(!(aForceReflow && (GetBidi() == 0)), "ForceReflow on new prescontext"); GetDocument()->SetBidiOptions(aSource); if (IBMBIDI_TEXTDIRECTION_RTL == GET_BIDI_OPTION_DIRECTION(aSource) || IBMBIDI_NUMERAL_HINDI == GET_BIDI_OPTION_NUMERAL(aSource)) { SetBidiEnabled(PR_TRUE); } 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 (aForceReflow) { ClearStyleDataAndReflow(); } } PRUint32 nsPresContext::GetBidi() const { return GetDocument()->GetBidiOptions(); } #endif //IBMBIDI nsITheme* nsPresContext::GetTheme() { if (!mNoTheme && !mTheme) { mTheme = do_GetService("@mozilla.org/chrome/chrome-native-theme;1"); if (!mTheme) mNoTheme = PR_TRUE; } return mTheme; } void nsPresContext::ThemeChanged() { // Tell the theme that it changed, so it can flush any handles to stale theme // data. if (mTheme) mTheme->ThemeChanged(); // Clear all cached nsILookAndFeel colors. if (mLookAndFeel) mLookAndFeel->LookAndFeelChanged(); // We have to clear style data because the assumption of style rule // immutability has been violated since any style rule that uses // system colors or fonts (and probably -moz-appearance as well) has // changed. nsPresContext::ClearStyleDataAndReflow(); } void nsPresContext::SysColorChanged() { if (mLookAndFeel) { // Don't use the cached values for the system colors mLookAndFeel->LookAndFeelChanged(); } // Reset default background and foreground colors for the document since // they may be using system colors GetDocumentColorPreferences(); // Clear out all of the style data since it may contain RGB values // which originated from system colors. nsCOMPtr imageService; nsresult result; imageService = do_GetService(kSelectionImageService, &result); if (NS_SUCCEEDED(result) && imageService) { imageService->Reset(); } // We need to do a full reflow (and view update) here. Clearing the style // data without reflowing/updating views will lead to incorrect change hints // later, because when generating change hints, any style structs which have // been cleared and not reread are assumed to not be used at all. ClearStyleDataAndReflow(); } void nsPresContext::GetPageDim(nsRect* aActualRect, nsRect* aAdjRect) { if (mMedium == nsLayoutAtoms::print) { if (aActualRect) { PRInt32 width, height; nsresult rv = mDeviceContext->GetDeviceSurfaceDimensions(width, height); if (NS_SUCCEEDED(rv)) aActualRect->SetRect(0, 0, width, height); } if (aAdjRect) *aAdjRect = mPageDim; } else { if (aActualRect) aActualRect->SetRect(0, 0, 0, 0); if (aAdjRect) aAdjRect->SetRect(0, 0, 0, 0); } } void nsPresContext::SetPageDim(const nsRect& aPageDim) { if (mMedium == nsLayoutAtoms::print) mPageDim = aPageDim; } void nsPresContext::SetPaginatedScrolling(PRBool aPaginated) { if (mType == eContext_PrintPreview) mCanPaginatedScroll = aPaginated; } void nsPresContext::SetPrintSettings(nsIPrintSettings *aPrintSettings) { if (mMedium == nsLayoutAtoms::print) mPrintSettings = aPrintSettings; } PRBool nsPresContext::EnsureVisible(PRBool aUnsuppressFocus) { nsCOMPtr docShell(do_QueryReferent(mContainer)); if (docShell) { nsCOMPtr cv; docShell->GetContentViewer(getter_AddRefs(cv)); // Make sure this is the content viewer we belong with nsCOMPtr docV(do_QueryInterface(cv)); if (docV) { nsCOMPtr currentPresContext; docV->GetPresContext(getter_AddRefs(currentPresContext)); if (currentPresContext == this) { // OK, this is us. We want to call Show() on the content viewer. But // first, we need to suppress focus changes; otherwise the focus will // get sent to the wrong place (toplevel window). nsCOMPtr privWindow = do_GetInterface(docShell); // XXXbz privWindow should never really be null! nsIFocusController* fc = privWindow ? privWindow->GetRootFocusController() : nsnull; if (fc) { fc->SetSuppressFocus(PR_TRUE, "nsPresContext::EnsureVisible Suppression"); } cv->Show(); if (fc && aUnsuppressFocus) { fc->SetSuppressFocus(PR_FALSE, "nsPresContext::EnsureVisible Suppression"); } return PR_TRUE; } } } return PR_FALSE; } nsresult NS_NewPresContext(nsPresContext::nsPresContextType aType, nsPresContext** aInstancePtrResult) { nsPresContext *context = new nsPresContext(aType); if (!context) return NS_ERROR_OUT_OF_MEMORY; NS_ADDREF(*aInstancePtrResult = context); return NS_OK; } #ifdef MOZ_REFLOW_PERF void nsPresContext::CountReflows(const char * aName, PRUint32 aType, nsIFrame * aFrame) { if (mShell) { mShell->CountReflows(aName, aType, aFrame); } } #endif