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pjs/layout/base/nsPresContext.cpp

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: NPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Netscape 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/NPL/
*
* 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 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 NPL, 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 NPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "nsCOMPtr.h"
#include "nsPresContext.h"
#include "nsIPresShell.h"
#include "nsIPref.h"
#include "nsILinkHandler.h"
#include "nsIDocShellTreeItem.h"
#include "nsStyleSet.h"
#include "nsIFrameManager.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 "nsIScriptGlobalObject.h"
#include "nsIDOMWindow.h"
#include "nsXPIDLString.h"
#include "nsIWeakReferenceUtils.h"
#include "nsCSSRendering.h"
#include "prprf.h"
#include "nsContentPolicyUtils.h"
#include "nsIScriptGlobalObject.h"
#include "nsIDOMDocument.h"
#include "nsAutoPtr.h"
#ifdef IBMBIDI
#include "nsBidiPresUtils.h"
#endif // IBMBIDI
// 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
}
#ifdef IBMBIDI
PRBool
IsVisualCharset(const nsCAutoString& aCharset)
{
if (aCharset.EqualsIgnoreCase("ibm864") // Arabic//ahmed
|| aCharset.EqualsIgnoreCase("ibm862") // Hebrew
|| aCharset.EqualsIgnoreCase("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(kEventStateManagerCID, NS_EVENTSTATEMANAGER_CID);
static NS_DEFINE_CID(kSelectionImageService, NS_SELECTIONIMAGESERVICE_CID);
nsPresContext::nsPresContext()
: 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))
{
mCompatibilityMode = eCompatibility_FullStandards;
mImageAnimationMode = imgIContainer::kNormalAnimMode;
mImageAnimationModePref = imgIContainer::kNormalAnimMode;
SetBackgroundImageDraw(PR_TRUE); // always draw the background
SetBackgroundColorDraw(PR_TRUE);
mShell = nsnull;
mLinkHandler = nsnull;
mContainer = nsnull;
mDefaultColor = NS_RGB(0x00, 0x00, 0x00);
mBackgroundColor = NS_RGB(0xFF, 0xFF, 0xFF);
mUseDocumentColors = PR_TRUE;
mUseDocumentFonts = PR_TRUE;
// the minimum font-size is unconstrained by default
mMinimumFontSize = 0;
mLinkColor = NS_RGB(0x00, 0x00, 0xEE);
mActiveLinkColor = NS_RGB(0xEE, 0x00, 0x00);
mVisitedLinkColor = NS_RGB(0x55, 0x1A, 0x8B);
mUnderlineLinks = PR_TRUE;
mUseFocusColors = PR_FALSE;
mFocusTextColor = mDefaultColor;
mFocusBackgroundColor = mBackgroundColor;
mFocusRingWidth = 1;
mFocusRingOnAnything = PR_FALSE;
mLanguageSpecificTransformType = eLanguageSpecificTransformType_Unknown;
mIsRenderingOnlySelection = PR_FALSE;
#ifdef IBMBIDI
mIsVisual = PR_FALSE;
mBidiUtils = nsnull;
mIsBidiSystem = PR_FALSE;
mBidi = 0;
#endif // IBMBIDI
}
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);
}
// Unregister preference callbacks
if (mPrefs) {
mPrefs->UnregisterCallback("font.", nsPresContext::PrefChangedCallback, (void*)this);
mPrefs->UnregisterCallback("browser.display.", nsPresContext::PrefChangedCallback, (void*)this);
mPrefs->UnregisterCallback("browser.underline_anchors", nsPresContext::PrefChangedCallback, (void*)this);
mPrefs->UnregisterCallback("browser.anchor_color", nsPresContext::PrefChangedCallback, (void*)this);
mPrefs->UnregisterCallback("browser.active_color", nsPresContext::PrefChangedCallback, (void*)this);
mPrefs->UnregisterCallback("browser.visited_color", nsPresContext::PrefChangedCallback, (void*)this);
mPrefs->UnregisterCallback("network.image.imageBehavior", nsPresContext::PrefChangedCallback, (void*)this);
mPrefs->UnregisterCallback("image.animation_mode", nsPresContext::PrefChangedCallback, (void*)this);
#ifdef IBMBIDI
mPrefs->UnregisterCallback("bidi.", PrefChangedCallback, (void*)this);
#endif
}
#ifdef IBMBIDI
if (mBidiUtils) {
delete mBidiUtils;
}
#endif // IBMBIDI
NS_IF_RELEASE(mDeviceContext);
NS_IF_RELEASE(mLookAndFeel);
NS_IF_RELEASE(mLanguage);
}
NS_IMPL_ISUPPORTS2(nsPresContext, nsIPresContext, 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 (!mPrefs || !mLanguage)
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;
GetScaledPixelsToTwips(&p2t);
mDefaultVariableFont.size = NSFloatPixelsToTwips((float)16, p2t);
mDefaultFixedFont.size = NSFloatPixelsToTwips((float)13, p2t);
nsAutoString langGroup;
nsCOMPtr<nsIAtom> langGroupAtom;
mLanguage->GetLanguageGroup(getter_AddRefs(langGroupAtom));
langGroupAtom->ToString(langGroup);
nsCAutoString pref;
nsXPIDLString value;
nsXPIDLCString cvalue;
// get the current applicable font-size unit
enum {eUnit_unknown = -1, eUnit_px, eUnit_pt};
PRInt32 unit = eUnit_px;
nsresult rv = mPrefs->CopyCharPref("font.size.unit", getter_Copies(cvalue));
if (NS_SUCCEEDED(rv)) {
if (!PL_strcmp(cvalue.get(), "px")) {
unit = eUnit_px;
}
else if (!PL_strcmp(cvalue.get(), "pt")) {
unit = eUnit_pt;
}
else {
NS_WARNING("unexpected font-size unit -- expected: 'px' or 'pt'");
unit = eUnit_unknown;
}
}
// get font.minimum-size.[langGroup]
PRInt32 size;
pref.Assign("font.minimum-size.");
AppendUTF16toUTF8(langGroup, pref);
rv = mPrefs->GetIntPref(pref.get(), &size);
if (NS_SUCCEEDED(rv)) {
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]);
AppendUTF16toUTF8(langGroup, generic_dot_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;
default: NS_ERROR("not reached - bogus to silence some compilers"); 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);
rv = mPrefs->CopyUnicharPref(pref.get(), getter_Copies(value));
if (NS_SUCCEEDED(rv)) {
font->name.Assign(value);
}
else {
rv = mPrefs->CopyUnicharPref("font.default", getter_Copies(value));
if (NS_SUCCEEDED(rv)) {
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);
rv = mPrefs->GetIntPref(pref.get(), &size);
if (NS_SUCCEEDED(rv) && 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);
rv = mPrefs->CopyCharPref(pref.get(), getter_Copies(cvalue));
if (NS_SUCCEEDED(rv)) {
font->sizeAdjust = (float)atof(cvalue.get());
}
#ifdef DEBUG_rbs
printf("%s Family-list:%s size:%d sizeAdjust:%.2f\n",
generic_dot_langGroup.get(),
NS_ConvertUCS2toUTF8(font->name).get(), font->size,
font->sizeAdjust);
#endif
}
}
void
nsPresContext::GetDocumentColorPreferences()
{
PRBool usePrefColors = PR_TRUE;
PRBool boolPref;
nsXPIDLCString colorStr;
nsCOMPtr<nsIDocShellTreeItem> docShell(do_QueryReferent(mContainer));
if (docShell) {
PRInt32 docShellType;
docShell->GetItemType(&docShellType);
if (nsIDocShellTreeItem::typeChrome == docShellType)
usePrefColors = PR_FALSE;
}
if (usePrefColors) {
if (NS_SUCCEEDED(mPrefs->GetBoolPref("browser.display.use_system_colors", &boolPref))) {
usePrefColors = !boolPref;
}
}
if (usePrefColors) {
if (NS_SUCCEEDED(mPrefs->CopyCharPref("browser.display.foreground_color", getter_Copies(colorStr)))) {
mDefaultColor = MakeColorPref(colorStr);
}
if (NS_SUCCEEDED(mPrefs->CopyCharPref("browser.display.background_color", getter_Copies(colorStr)))) {
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);
}
if (NS_SUCCEEDED(mPrefs->GetBoolPref("browser.display.use_document_colors", &boolPref))) {
mUseDocumentColors = boolPref;
}
}
void
nsPresContext::GetUserPreferences()
{
PRInt32 prefInt;
if (NS_SUCCEEDED(mPrefs->GetIntPref("browser.display.base_font_scaler", &prefInt))) {
mFontScaler = prefInt;
}
// * document colors
GetDocumentColorPreferences();
// * link colors
PRBool boolPref;
nsXPIDLCString colorStr;
if (NS_SUCCEEDED(mPrefs->GetBoolPref("browser.underline_anchors", &boolPref))) {
mUnderlineLinks = boolPref;
}
if (NS_SUCCEEDED(mPrefs->CopyCharPref("browser.anchor_color", getter_Copies(colorStr)))) {
mLinkColor = MakeColorPref(colorStr);
}
if (NS_SUCCEEDED(mPrefs->CopyCharPref("browser.active_color", getter_Copies(colorStr)))) {
mActiveLinkColor = MakeColorPref(colorStr);
}
if (NS_SUCCEEDED(mPrefs->CopyCharPref("browser.visited_color", getter_Copies(colorStr)))) {
mVisitedLinkColor = MakeColorPref(colorStr);
}
if (NS_SUCCEEDED(mPrefs->GetBoolPref("browser.display.use_focus_colors", &boolPref))) {
mUseFocusColors = boolPref;
mFocusTextColor = mDefaultColor;
mFocusBackgroundColor = mBackgroundColor;
if (NS_SUCCEEDED(mPrefs->CopyCharPref("browser.display.focus_text_color", getter_Copies(colorStr)))) {
mFocusTextColor = MakeColorPref(colorStr);
}
if (NS_SUCCEEDED(mPrefs->CopyCharPref("browser.display.focus_background_color", getter_Copies(colorStr)))) {
mFocusBackgroundColor = MakeColorPref(colorStr);
}
}
if (NS_SUCCEEDED(mPrefs->GetIntPref("browser.display.focus_ring_width", &prefInt))) {
mFocusRingWidth = prefInt;
}
if (NS_SUCCEEDED(mPrefs->GetBoolPref("browser.display.focus_ring_on_anything", &boolPref))) {
mFocusRingOnAnything = boolPref;
}
// * use fonts?
if (NS_SUCCEEDED(mPrefs->GetIntPref("browser.display.use_document_fonts", &prefInt))) {
mUseDocumentFonts = prefInt == 0 ? PR_FALSE : PR_TRUE;
}
GetFontPreferences();
// * image animation
char* animatePref = 0;
nsresult rv = mPrefs->CopyCharPref("image.animation_mode", &animatePref);
if (NS_SUCCEEDED(rv) && animatePref) {
if (!nsCRT::strcmp(animatePref, "normal"))
mImageAnimationModePref = imgIContainer::kNormalAnimMode;
else if (!nsCRT::strcmp(animatePref, "none"))
mImageAnimationModePref = imgIContainer::kDontAnimMode;
else if (!nsCRT::strcmp(animatePref, "once"))
mImageAnimationModePref = imgIContainer::kLoopOnceAnimMode;
nsMemory::Free(animatePref);
}
#ifdef IBMBIDI
if (NS_SUCCEEDED(mPrefs->GetIntPref("bidi.direction", &prefInt))) {
SET_BIDI_OPTION_DIRECTION(mBidi, prefInt);
}
if (NS_SUCCEEDED(mPrefs->GetIntPref("bidi.texttype", &prefInt))) {
SET_BIDI_OPTION_TEXTTYPE(mBidi, prefInt);
}
if (NS_SUCCEEDED(mPrefs->GetIntPref("bidi.controlstextmode", &prefInt))) {
SET_BIDI_OPTION_CONTROLSTEXTMODE(mBidi, prefInt);
}
if (NS_SUCCEEDED(mPrefs->GetIntPref("bidi.clipboardtextmode", &prefInt))) {
SET_BIDI_OPTION_CLIPBOARDTEXTMODE(mBidi, prefInt);
}
if (NS_SUCCEEDED(mPrefs->GetIntPref("bidi.numeral", &prefInt))) {
SET_BIDI_OPTION_NUMERAL(mBidi, prefInt);
}
if (NS_SUCCEEDED(mPrefs->GetIntPref("bidi.support", &prefInt))) {
SET_BIDI_OPTION_SUPPORT(mBidi, prefInt);
}
if (NS_SUCCEEDED(mPrefs->GetIntPref("bidi.characterset", &prefInt))) {
SET_BIDI_OPTION_CHARACTERSET(mBidi, prefInt);
}
#endif
}
NS_IMETHODIMP
nsPresContext::GetCachedIntPref(PRUint32 aPrefType, PRInt32& aValue)
{
nsresult rv = NS_OK;
switch (aPrefType) {
case kPresContext_MinimumFontSize:
aValue = mMinimumFontSize;
break;
default:
rv = NS_ERROR_INVALID_ARG;
NS_ERROR("invalid arg");
}
return rv;
}
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)
{
nsCOMPtr<nsIDocShellTreeItem> docShell(do_QueryReferent(mContainer));
if (docShell) {
PRInt32 docShellType;
docShell->GetItemType(&docShellType);
if (nsIDocShellTreeItem::typeChrome == docShellType)
return;
}
// Initialize our state from the user preferences
GetUserPreferences();
// update the presShell: tell it to set the preference style rules up
if (mShell) {
mShell->SetPreferenceStyleRules(PR_TRUE);
}
mDeviceContext->FlushFontCache();
nsPresContext::ClearStyleDataAndReflow();
}
NS_IMETHODIMP
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() below.
nsresult rv = CallGetService(kLookAndFeelCID, &mLookAndFeel);
if (NS_FAILED(rv)) {
NS_ERROR("LookAndFeel service must be implemented for this toolkit");
return rv;
}
mLangService = do_GetService(NS_LANGUAGEATOMSERVICE_CONTRACTID);
mPrefs = do_GetService(NS_PREF_CONTRACTID);
if (mPrefs) {
// Register callbacks so we're notified when the preferences change
mPrefs->RegisterCallback("font.", nsPresContext::PrefChangedCallback, (void*)this);
mPrefs->RegisterCallback("browser.display.", nsPresContext::PrefChangedCallback, (void*)this);
mPrefs->RegisterCallback("browser.underline_anchors", nsPresContext::PrefChangedCallback, (void*)this);
mPrefs->RegisterCallback("browser.anchor_color", nsPresContext::PrefChangedCallback, (void*)this);
mPrefs->RegisterCallback("browser.active_color", nsPresContext::PrefChangedCallback, (void*)this);
mPrefs->RegisterCallback("browser.visited_color", nsPresContext::PrefChangedCallback, (void*)this);
mPrefs->RegisterCallback("network.image.imageBehavior", nsPresContext::PrefChangedCallback, (void*)this);
mPrefs->RegisterCallback("image.animation_mode", nsPresContext::PrefChangedCallback, (void*)this);
#ifdef IBMBIDI
mPrefs->RegisterCallback("bidi.", PrefChangedCallback, (void*)this);
#endif
// Initialize our state from the user preferences
GetUserPreferences();
}
#ifdef DEBUG
mInitialized = PR_TRUE;
#endif
return NS_OK;
}
// Note: We don't hold a reference on the shell; it has a reference to
// us
NS_IMETHODIMP
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.
nsCOMPtr<nsIDocument> doc;
mShell->GetDocument(getter_AddRefs(doc));
if (doc) {
doc->RemoveCharSetObserver(this);
}
}
mShell = aShell;
if (mShell) {
nsCOMPtr<nsIDocument> doc;
if (NS_SUCCEEDED(mShell->GetDocument(getter_AddRefs(doc)))) {
NS_ASSERTION(doc, "expect document here");
if (doc) {
nsIURI *baseURI = doc->GetBaseURI();
if (!mNeverAnimate && 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().get());
}
}
}
}
return NS_OK;
}
void
nsPresContext::UpdateCharSet(const char* aCharSet)
{
if (mLangService) {
NS_IF_RELEASE(mLanguage);
mLangService->LookupCharSet(aCharSet, &mLanguage); // addrefs
GetFontPreferences();
if (mLanguage) {
nsCOMPtr<nsIAtom> langGroupAtom;
mLanguage->GetLanguageGroup(getter_AddRefs(langGroupAtom));
NS_ASSERTION(langGroupAtom, "non-NULL language group atom expected");
if (langGroupAtom.get() == nsLayoutAtoms::Japanese) {
mLanguageSpecificTransformType =
eLanguageSpecificTransformType_Japanese;
}
else if (langGroupAtom.get() == nsLayoutAtoms::Korean) {
mLanguageSpecificTransformType =
eLanguageSpecificTransformType_Korean;
}
else {
mLanguageSpecificTransformType =
eLanguageSpecificTransformType_None;
}
}
}
#ifdef IBMBIDI
//ahmed
mCharset=aCharSet;
SetVisualMode(IsVisualCharset(mCharset) );
#endif // IBMBIDI
}
NS_IMETHODIMP
nsPresContext::Observe(nsISupports* aSubject,
const char* aTopic,
const PRUnichar* aData)
{
if (!nsCRT::strcmp(aTopic, "charset")) {
UpdateCharSet(NS_LossyConvertUCS2toASCII(aData).get());
mDeviceContext->FlushFontCache();
nsPresContext::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<imgIContainer> 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<nsIImageLoadingContent> imgContent(do_QueryInterface(aParent));
if (imgContent) {
nsCOMPtr<imgIRequest> imgReq;
imgContent->GetRequest(nsIImageLoadingContent::CURRENT_REQUEST,
getter_AddRefs(imgReq));
SetImgAnimModeOnImgReq(imgReq, aMode);
}
PRUint32 count = aParent->GetChildCount();
for (PRUint32 i = 0; i < count; ++i) {
SetImgAnimations(aParent->GetChildAt(i), aMode);
}
}
void
nsPresContext::SetImageAnimationMode(PRUint16 aMode)
{
NS_ASSERTION(aMode == imgIContainer::kNormalAnimMode ||
aMode == imgIContainer::kDontAnimMode ||
aMode == imgIContainer::kLoopOnceAnimMode, "Wrong Animation Mode is being set!");
// This hash table contains a list of background images
// so iterate over it and set the mode
mImageLoaders.Enumerate(set_animation_mode, (void*)aMode);
// Now walk the content tree and set the animation mode
// on all the images
nsCOMPtr<nsIDocument> doc;
if (mShell != nsnull) {
mShell->GetDocument(getter_AddRefs(doc));
if (doc) {
nsIContent *rootContent = doc->GetRootContent();
if (rootContent) {
SetImgAnimations(rootContent, aMode);
}
}
}
mImageAnimationMode = aMode;
}
nsresult
nsPresContext::GetXBLBindingURL(nsIContent* aContent, nsIURI** aResult)
{
nsRefPtr<nsStyleContext> sc;
sc = StyleSet()->ResolveStyleFor(aContent, nsnull);
NS_ENSURE_TRUE(sc, NS_ERROR_FAILURE);
*aResult = sc->GetStyleDisplay()->mBinding;
NS_IF_ADDREF(*aResult);
return NS_OK;
}
NS_IMETHODIMP
nsPresContext::AllocateFromShell(size_t aSize, void** aResult)
{
if (mShell)
return mShell->AllocateFrame(aSize, aResult);
return NS_OK;
}
NS_IMETHODIMP
nsPresContext::FreeToShell(size_t aSize, void* aFreeChunk)
{
if (mShell)
return mShell->FreeFrame(aSize, aFreeChunk);
return NS_OK;
}
NS_IMETHODIMP
nsPresContext::GetMetricsFor(const nsFont& aFont, nsIFontMetrics** aResult)
{
NS_PRECONDITION(aResult, "null out param");
nsIFontMetrics* metrics = nsnull;
nsCOMPtr<nsIAtom> langGroup;
if (mLanguage) {
mLanguage->GetLanguageGroup(getter_AddRefs(langGroup));
}
mDeviceContext->GetMetricsFor(aFont, langGroup, metrics);
*aResult = metrics;
return NS_OK;
}
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;
}
NS_IMETHODIMP
nsPresContext::GetTwipsToPixelsForFonts(float* aResult) const
{
NS_PRECONDITION(nsnull != aResult, "null ptr");
if (nsnull == aResult) {
return NS_ERROR_NULL_POINTER;
}
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<nsIDeviceContext> altDC;
mDeviceContext->GetAltDevice(getter_AddRefs(altDC));
if (altDC) {
app2dev = altDC->AppUnitsToDevUnits();
} else {
app2dev = mDeviceContext->AppUnitsToDevUnits();
}
#else
app2dev = mDeviceContext->AppUnitsToDevUnits();
#endif
*aResult = app2dev;
return NS_OK;
}
NS_IMETHODIMP
nsPresContext::GetScaledPixelsToTwips(float* aResult) const
{
NS_PRECONDITION(aResult, "null out param");
float scale;
float p2t;
p2t = mDeviceContext->DevUnitsToAppUnits();
mDeviceContext->GetCanonicalPixelScale(scale);
scale = p2t * scale;
*aResult = scale;
return NS_OK;
}
nsresult
nsPresContext::LoadImage(nsIURI* aURL,
nsIFrame* aTargetFrame,//may be null (precached image)
imgIRequest **aRequest)
{
// 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) {
nsIContent* content = aTargetFrame->GetContent();
// Check with the content-policy things to make sure this load is permitted.
nsresult rv;
nsCOMPtr<nsIDOMElement> element(do_QueryInterface(content));
if (content && element) {
nsCOMPtr<nsIDocument> document = content->GetDocument();
// If there is no document, skip the policy check
// XXXldb This really means the document is being destroyed, so
// perhaps we're better off skipping the load entirely.
if (document) {
nsCOMPtr<nsIDOMWindow> domWin(do_QueryInterface(document->GetScriptGlobalObject()));
if (domWin) {
PRBool shouldLoad = PR_TRUE;
rv = NS_CheckContentLoadPolicy(nsIContentPolicy::IMAGE,
aURL, element, domWin, &shouldLoad);
if (NS_SUCCEEDED(rv) && !shouldLoad)
return NS_ERROR_FAILURE;
}
}
}
loader = new nsImageLoader();
if (!loader)
return NS_ERROR_OUT_OF_MEMORY;
NS_ADDREF(loader); // new
loader->Init(aTargetFrame, this);
mImageLoaders.Put(&key, loader);
}
loader->Load(aURL);
NS_IF_ADDREF(*aRequest = loader->GetRequest());
NS_RELEASE(loader);
return NS_OK;
}
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<nsISupports>
nsPresContext::GetContainer()
{
nsISupports *result;
if (mContainer)
CallQueryReferent(mContainer.get(), &result);
else
result = nsnull;
return result;
}
nsIEventStateManager*
nsIPresContext::GetEventStateManager()
{
if (!mEventManager) {
nsresult rv = CallCreateInstance(kEventStateManagerCID, &mEventManager);
if (NS_FAILED(rv)) {
return nsnull;
}
//Not refcnted, set null in destructor
mEventManager->SetPresContext(this);
}
return mEventManager;
}
NS_IMETHODIMP
nsPresContext::GetEventStateManager(nsIEventStateManager** aManager)
{
NS_PRECONDITION(aManager, "null ptr");
*aManager = GetEventStateManager();
if (!*aManager)
return NS_ERROR_OUT_OF_MEMORY;
NS_ADDREF(*aManager);
return NS_OK;
}
#ifdef IBMBIDI
//ahmed
NS_IMETHODIMP
nsPresContext::IsArabicEncoding(PRBool& aResult) const
{
aResult=PR_FALSE;
if ( (mCharset.EqualsIgnoreCase("ibm864") )||(mCharset.EqualsIgnoreCase("ibm864i") )||(mCharset.EqualsIgnoreCase("windows-1256") )||(mCharset.EqualsIgnoreCase("iso-8859-6") ))
aResult=PR_TRUE;
return NS_OK;
}
NS_IMETHODIMP
nsPresContext::IsVisRTL(PRBool& aResult) const
{
aResult=PR_FALSE;
if ( (mIsVisual)&&(GET_BIDI_OPTION_DIRECTION(mBidi) == IBMBIDI_TEXTDIRECTION_RTL) )
aResult=PR_TRUE;
return NS_OK;
}
NS_IMETHODIMP
nsPresContext::GetBidiEnabled(PRBool* aBidiEnabled) const
{
NS_ENSURE_ARG_POINTER(aBidiEnabled);
*aBidiEnabled = PR_FALSE;
NS_ASSERTION(mShell, "PresShell must be set on PresContext before calling nsPresContext::GetBidiEnabled");
if (mShell) {
nsCOMPtr<nsIDocument> doc;
mShell->GetDocument(getter_AddRefs(doc) );
NS_ASSERTION(doc, "PresShell has no document in nsPresContext::GetBidiEnabled");
if (doc) {
*aBidiEnabled = doc->GetBidiEnabled();
}
}
return NS_OK;
}
NS_IMETHODIMP
nsPresContext::SetBidiEnabled(PRBool aBidiEnabled) const
{
if (mShell) {
nsCOMPtr<nsIDocument> doc;
mShell->GetDocument(getter_AddRefs(doc) );
if (doc) {
doc->SetBidiEnabled(aBidiEnabled);
}
}
return NS_OK;
}
NS_IMETHODIMP
nsPresContext::GetBidiUtils(nsBidiPresUtils** aBidiUtils)
{
nsresult rv = NS_OK;
if (!mBidiUtils) {
mBidiUtils = new nsBidiPresUtils;
if (!mBidiUtils) {
rv = NS_ERROR_OUT_OF_MEMORY;
}
}
*aBidiUtils = mBidiUtils;
return rv;
}
NS_IMETHODIMP nsPresContext::SetBidi(PRUint32 aSource, PRBool aForceReflow)
{
mBidi = aSource;
if (IBMBIDI_TEXTDIRECTION_RTL == GET_BIDI_OPTION_DIRECTION(mBidi)
|| IBMBIDI_NUMERAL_HINDI == GET_BIDI_OPTION_NUMERAL(mBidi)) {
SetBidiEnabled(PR_TRUE);
}
if (IBMBIDI_TEXTTYPE_VISUAL == GET_BIDI_OPTION_TEXTTYPE(mBidi)) {
SetVisualMode(PR_TRUE);
}
else if (IBMBIDI_TEXTTYPE_LOGICAL == GET_BIDI_OPTION_TEXTTYPE(mBidi)) {
SetVisualMode(PR_FALSE);
}
else {
SetVisualMode(IsVisualCharset(mCharset) );
}
if (mShell && aForceReflow) {
nsPresContext::ClearStyleDataAndReflow();
}
return NS_OK;
}
NS_IMETHODIMP nsPresContext::GetBidi(PRUint32* aDest) const
{
if (aDest)
*aDest = mBidi;
return NS_OK;
}
//Mohamed 17-1-01
NS_IMETHODIMP
nsPresContext::GetBidiCharset(nsACString &aCharSet) const
{
aCharSet = mCharset;
return NS_OK;
}
//Mohamed End
#endif //IBMBIDI
NS_IMETHODIMP
nsPresContext::GetLanguageSpecificTransformType(
nsLanguageSpecificTransformType* aType)
{
NS_PRECONDITION(aType, "null out param");
*aType = mLanguageSpecificTransformType;
return NS_OK;
}
NS_IMETHODIMP
nsPresContext::GetTheme(nsITheme** aResult)
{
if (!mNoTheme && !mTheme) {
mTheme = do_GetService("@mozilla.org/chrome/chrome-native-theme;1");
if (!mTheme)
mNoTheme = PR_TRUE;
}
*aResult = mTheme;
NS_IF_ADDREF(*aResult);
return mTheme ? NS_OK : NS_ERROR_FAILURE;
}
NS_IMETHODIMP
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();
if (!mShell)
return NS_OK;
return mShell->ReconstructStyleData();
}
NS_IMETHODIMP
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<nsISelectionImageService> 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.
nsPresContext::ClearStyleDataAndReflow();
return NS_OK;
}
NS_IMETHODIMP
nsPresContext::FindFrameBackground(nsIFrame* aFrame,
const nsStyleBackground** aBackground,
PRBool* aIsCanvas,
PRBool* aFoundBackground)
{
*aFoundBackground = nsCSSRendering::FindBackground(this, aFrame,
aBackground, aIsCanvas);
return NS_OK;
}
#ifdef MOZ_REFLOW_PERF
NS_IMETHODIMP
nsPresContext::CountReflows(const char * aName, PRUint32 aType, nsIFrame * aFrame)
{
if (mShell) {
mShell->CountReflows(aName, aType, aFrame);
}
return NS_OK;
}
NS_IMETHODIMP
nsPresContext::PaintCount(const char * aName, nsIRenderingContext* aRenderingContext, nsIFrame * aFrame, PRUint32 aColor)
{
if (mShell) {
mShell->PaintCount(aName, aRenderingContext, this, aFrame, aColor);
}
return NS_OK;
}
#endif
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