nsresult
ChangeStyleTransaction::SetStyle(bool aAttributeWasSet,
nsAString& aValue)
{
if (aAttributeWasSet) {
// The style attribute was not empty, let's recreate the declaration
nsAutoString propertyNameString;
mProperty->ToString(propertyNameString);
nsCOMPtr<nsStyledElement> inlineStyles = do_QueryInterface(mElement);
NS_ENSURE_TRUE(inlineStyles, NS_ERROR_NULL_POINTER);
nsCOMPtr<nsICSSDeclaration> cssDecl = inlineStyles->Style();
if (aValue.IsEmpty()) {
// An empty value means we have to remove the property
nsAutoString returnString;
return cssDecl->RemoveProperty(propertyNameString, returnString);
}
// Let's recreate the declaration as it was
nsAutoString priority;
cssDecl->GetPropertyPriority(propertyNameString, priority);
return cssDecl->SetProperty(propertyNameString, aValue, priority);
}
return mElement->UnsetAttr(kNameSpaceID_None, nsGkAtoms::style, true);
}
NS_IMETHODIMP
nsXTFElementWrapper::RemoveAttribute(const nsAString& aName)
{
const nsAttrName* name = InternalGetExistingAttrNameFromQName(aName);
if (name) {
nsAttrName tmp(*name);
return UnsetAttr(name->NamespaceID(), name->LocalName(), PR_TRUE);
}
// Maybe this attribute is handled by our inner element:
if (mAttributeHandler) {
nsCOMPtr<nsIAtom> nameAtom = do_GetAtom(aName);
return UnsetAttr(kNameSpaceID_None, nameAtom, PR_TRUE);
}
return NS_OK;
}
NS_IMETHODIMP
ChangeStyleTransaction::DoTransaction()
{
nsCOMPtr<nsStyledElement> inlineStyles = do_QueryInterface(mElement);
NS_ENSURE_TRUE(inlineStyles, NS_ERROR_NULL_POINTER);
nsCOMPtr<nsICSSDeclaration> cssDecl = inlineStyles->Style();
nsAutoString propertyNameString;
mProperty->ToString(propertyNameString);
mUndoAttributeWasSet = mElement->HasAttr(kNameSpaceID_None,
nsGkAtoms::style);
nsAutoString values;
nsresult rv = cssDecl->GetPropertyValue(propertyNameString, values);
NS_ENSURE_SUCCESS(rv, rv);
mUndoValue.Assign(values);
// Does this property accept more than one value? (bug 62682)
bool multiple = AcceptsMoreThanOneValue(*mProperty);
if (mRemoveProperty) {
nsAutoString returnString;
if (multiple) {
// Let's remove only the value we have to remove and not the others
// The two lines below are a workaround because
// nsDOMCSSDeclaration::GetPropertyCSSValue is not yet implemented (bug
// 62682)
RemoveValueFromListOfValues(values, NS_LITERAL_STRING("none"));
RemoveValueFromListOfValues(values, mValue);
if (values.IsEmpty()) {
rv = cssDecl->RemoveProperty(propertyNameString, returnString);
NS_ENSURE_SUCCESS(rv, rv);
} else {
nsAutoString priority;
cssDecl->GetPropertyPriority(propertyNameString, priority);
rv = cssDecl->SetProperty(propertyNameString, values, priority);
NS_ENSURE_SUCCESS(rv, rv);
}
} else {
rv = cssDecl->RemoveProperty(propertyNameString, returnString);
NS_ENSURE_SUCCESS(rv, rv);
}
} else {
nsAutoString priority;
cssDecl->GetPropertyPriority(propertyNameString, priority);
if (multiple) {
// Let's add the value we have to add to the others
// The line below is a workaround because
// nsDOMCSSDeclaration::GetPropertyCSSValue is not yet implemented (bug
// 62682)
AddValueToMultivalueProperty(values, mValue);
} else {
values.Assign(mValue);
}
rv = cssDecl->SetProperty(propertyNameString, values, priority);
NS_ENSURE_SUCCESS(rv, rv);
}
// Let's be sure we don't keep an empty style attribute
uint32_t length = cssDecl->Length();
if (!length) {
rv = mElement->UnsetAttr(kNameSpaceID_None, nsGkAtoms::style, true);
NS_ENSURE_SUCCESS(rv, rv);
} else {
mRedoAttributeWasSet = true;
}
return cssDecl->GetPropertyValue(propertyNameString, mRedoValue);
}
