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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "nsStyledElement.h"
#include "mozAutoDocUpdate.h"
#include "nsGkAtoms.h"
#include "nsAttrValue.h"
#include "nsAttrValueInlines.h"
#include "mozilla/dom/ElementInlines.h"
#include "mozilla/InternalMutationEvent.h"
#include "nsDOMCSSDeclaration.h"
#include "nsDOMCSSAttrDeclaration.h"
#include "nsServiceManagerUtils.h"
#include "nsIDocument.h"
#include "mozilla/DeclarationBlockInlines.h"
#include "nsCSSParser.h"
#include "mozilla/css/Loader.h"
#include "nsIDOMMutationEvent.h"
#include "nsXULElement.h"
#include "nsContentUtils.h"
#include "nsStyleUtil.h"
using namespace mozilla;
using namespace mozilla::dom;
NS_IMPL_QUERY_INTERFACE_INHERITED(nsStyledElement,
nsStyledElementBase,
nsStyledElement)
//----------------------------------------------------------------------
// nsIContent methods
bool
nsStyledElement::ParseAttribute(int32_t aNamespaceID,
nsIAtom* aAttribute,
const nsAString& aValue,
nsAttrValue& aResult)
{
if (aAttribute == nsGkAtoms::style && aNamespaceID == kNameSpaceID_None) {
ParseStyleAttribute(aValue, aResult, false);
return true;
}
return nsStyledElementBase::ParseAttribute(aNamespaceID, aAttribute, aValue,
aResult);
}
nsresult
nsStyledElement::BeforeSetAttr(int32_t aNamespaceID, nsIAtom* aName,
const nsAttrValueOrString* aValue, bool aNotify)
{
if (aNamespaceID == kNameSpaceID_None) {
if (aName == nsGkAtoms::style) {
if (aValue) {
SetMayHaveStyle();
}
}
}
return nsStyledElementBase::BeforeSetAttr(aNamespaceID, aName, aValue,
aNotify);
}
nsresult
nsStyledElement::SetInlineStyleDeclaration(DeclarationBlock* aDeclaration,
const nsAString* aSerialized,
bool aNotify)
{
SetMayHaveStyle();
bool modification = false;
nsAttrValue oldValue;
bool oldValueSet = false;
bool hasListeners = aNotify &&
nsContentUtils::HasMutationListeners(this,
NS_EVENT_BITS_MUTATION_ATTRMODIFIED,
this);
// There's no point in comparing the stylerule pointers since we're always
// getting a new stylerule here. And we can't compare the stringvalues of
// the old and the new rules since both will point to the same declaration
// and thus will be the same.
if (hasListeners) {
// save the old attribute so we can set up the mutation event properly
// XXXbz if the old rule points to the same declaration as the new one,
// this is getting the new attr value, not the old one....
nsAutoString oldValueStr;
modification = GetAttr(kNameSpaceID_None, nsGkAtoms::style,
oldValueStr);
if (modification) {
oldValue.SetTo(oldValueStr);
oldValueSet = true;
}
}
else if (aNotify && IsInUncomposedDoc()) {
modification = !!mAttrsAndChildren.GetAttr(nsGkAtoms::style);
}
nsAttrValue attrValue(do_AddRef(aDeclaration), aSerialized);
// XXXbz do we ever end up with ADDITION here? I doubt it.
uint8_t modType = modification ?
static_cast<uint8_t>(nsIDOMMutationEvent::MODIFICATION) :
static_cast<uint8_t>(nsIDOMMutationEvent::ADDITION);
nsIDocument* document = GetComposedDoc();
mozAutoDocUpdate updateBatch(document, UPDATE_CONTENT_MODEL, aNotify);
return SetAttrAndNotify(kNameSpaceID_None, nsGkAtoms::style, nullptr,
oldValueSet ? &oldValue : nullptr, attrValue, modType,
hasListeners, aNotify, kDontCallAfterSetAttr,
document, updateBatch);
}
DeclarationBlock*
nsStyledElement::GetInlineStyleDeclaration()
{
if (!MayHaveStyle()) {
return nullptr;
}
const nsAttrValue* attrVal = mAttrsAndChildren.GetAttr(nsGkAtoms::style);
if (attrVal && attrVal->Type() == nsAttrValue::eCSSDeclaration) {
return attrVal->GetCSSDeclarationValue();
}
return nullptr;
}
// ---------------------------------------------------------------
// Others and helpers
nsICSSDeclaration*
nsStyledElement::Style()
{
Element::nsDOMSlots *slots = DOMSlots();
if (!slots->mStyle) {
// Just in case...
ReparseStyleAttribute(true);
slots->mStyle = new nsDOMCSSAttributeDeclaration(this, false);
SetMayHaveStyle();
}
return slots->mStyle;
}
nsresult
nsStyledElement::ReparseStyleAttribute(bool aForceInDataDoc)
{
if (!MayHaveStyle()) {
return NS_OK;
}
const nsAttrValue* oldVal = mAttrsAndChildren.GetAttr(nsGkAtoms::style);
if (oldVal && oldVal->Type() != nsAttrValue::eCSSDeclaration) {
nsAttrValue attrValue;
nsAutoString stringValue;
oldVal->ToString(stringValue);
ParseStyleAttribute(stringValue, attrValue, aForceInDataDoc);
// Don't bother going through SetInlineStyleDeclaration; we don't
// want to fire off mutation events or document notifications anyway
bool oldValueSet;
nsresult rv = mAttrsAndChildren.SetAndSwapAttr(nsGkAtoms::style, attrValue,
&oldValueSet);
NS_ENSURE_SUCCESS(rv, rv);
}
return NS_OK;
}
nsICSSDeclaration*
nsStyledElement::GetExistingStyle()
{
Element::nsDOMSlots* slots = GetExistingDOMSlots();
if (!slots) {
return nullptr;
}
return slots->mStyle;
}
void
nsStyledElement::ParseStyleAttribute(const nsAString& aValue,
nsAttrValue& aResult,
bool aForceInDataDoc)
{
nsIDocument* doc = OwnerDoc();
bool isNativeAnon = IsInNativeAnonymousSubtree();
if (!isNativeAnon &&
!nsStyleUtil::CSPAllowsInlineStyle(nullptr, NodePrincipal(),
doc->GetDocumentURI(), 0, aValue,
nullptr))
return;
if (aForceInDataDoc ||
!doc->IsLoadedAsData() ||
GetExistingStyle() ||
doc->IsStaticDocument()) {
bool isCSS = true; // assume CSS until proven otherwise
if (!isNativeAnon) { // native anonymous content always assumes CSS
nsAutoString styleType;
doc->GetHeaderData(nsGkAtoms::headerContentStyleType, styleType);
if (!styleType.IsEmpty()) {
static const char textCssStr[] = "text/css";
isCSS = (styleType.EqualsIgnoreCase(textCssStr, sizeof(textCssStr) - 1));
}
}
if (isCSS && aResult.ParseStyleAttribute(aValue, this)) {
return;
}
}
aResult.SetTo(aValue);
}
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