gecko-dev/layout/style/nsDOMCSSDeclaration.cpp

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/* -*- 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 Communicator client 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 "nsDOMCSSDeclaration.h"
#include "nsIDOMCSSRule.h"
#include "nsICSSParser.h"
#include "nsICSSLoader.h"
#include "nsIStyleRule.h"
#include "nsCSSDeclaration.h"
#include "nsCSSProps.h"
#include "nsCOMPtr.h"
#include "nsIURL.h"
#include "nsReadableUtils.h"
#include "nsContentUtils.h"
nsDOMCSSDeclaration::nsDOMCSSDeclaration()
: mInner(this)
{
}
nsDOMCSSDeclaration::~nsDOMCSSDeclaration()
{
}
// QueryInterface implementation for nsDOMCSSDeclaration
NS_INTERFACE_MAP_BEGIN(nsDOMCSSDeclaration)
NS_INTERFACE_MAP_ENTRY(nsICSSDeclaration)
NS_INTERFACE_MAP_ENTRY(nsIDOMCSSStyleDeclaration)
NS_INTERFACE_MAP_ENTRY_AGGREGATED(nsIDOMCSS2Properties, &mInner)
NS_INTERFACE_MAP_ENTRY_AGGREGATED(nsIDOMNSCSS2Properties, &mInner)
NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIDOMCSSStyleDeclaration)
NS_INTERFACE_MAP_ENTRY_CONTENT_CLASSINFO(CSSStyleDeclaration)
NS_INTERFACE_MAP_END
NS_IMETHODIMP
nsDOMCSSDeclaration::GetPropertyValue(const nsCSSProperty aPropID,
nsAString& aValue)
{
NS_PRECONDITION(aPropID != eCSSProperty_UNKNOWN,
"Should never pass eCSSProperty_UNKNOWN around");
nsCSSDeclaration *decl;
nsresult result = GetCSSDeclaration(&decl, PR_FALSE);
aValue.Truncate();
if (decl) {
result = decl->GetValue(aPropID, aValue);
}
return result;
}
NS_IMETHODIMP
nsDOMCSSDeclaration::SetPropertyValue(const nsCSSProperty aPropID,
const nsAString& aValue)
{
if (aValue.IsEmpty()) {
// If the new value of the property is an empty string we remove the
// property.
return RemoveProperty(aPropID);
}
return ParsePropertyValue(aPropID, aValue);
}
NS_IMETHODIMP
nsDOMCSSDeclaration::GetCssText(nsAString& aCssText)
{
nsCSSDeclaration* decl;
aCssText.Truncate();
GetCSSDeclaration(&decl, PR_FALSE);
if (decl) {
decl->ToString(aCssText);
}
return NS_OK;
}
NS_IMETHODIMP
nsDOMCSSDeclaration::SetCssText(const nsAString& aCssText)
{
return ParseDeclaration(aCssText, PR_FALSE, PR_TRUE);
}
NS_IMETHODIMP
nsDOMCSSDeclaration::GetLength(PRUint32* aLength)
{
nsCSSDeclaration *decl;
nsresult result = GetCSSDeclaration(&decl, PR_FALSE);
if (decl) {
*aLength = decl->Count();
} else {
*aLength = 0;
}
return result;
}
NS_IMETHODIMP
nsDOMCSSDeclaration::GetPropertyCSSValue(const nsAString& aPropertyName,
nsIDOMCSSValue** aReturn)
{
NS_ENSURE_ARG_POINTER(aReturn);
// We don't support CSSValue yet so we'll just return null...
*aReturn = nsnull;
return NS_OK;
}
NS_IMETHODIMP
nsDOMCSSDeclaration::Item(PRUint32 aIndex, nsAString& aReturn)
{
nsCSSDeclaration *decl;
nsresult result = GetCSSDeclaration(&decl, PR_FALSE);
aReturn.SetLength(0);
if (decl) {
result = decl->GetNthProperty(aIndex, aReturn);
}
return result;
}
NS_IMETHODIMP
nsDOMCSSDeclaration::GetPropertyValue(const nsAString& aPropertyName,
nsAString& aReturn)
{
const nsCSSProperty propID = nsCSSProps::LookupProperty(aPropertyName);
if (propID == eCSSProperty_UNKNOWN) {
aReturn.Truncate();
return NS_OK;
}
return GetPropertyValue(propID, aReturn);
}
NS_IMETHODIMP
nsDOMCSSDeclaration::GetPropertyPriority(const nsAString& aPropertyName,
nsAString& aReturn)
{
nsCSSDeclaration *decl;
nsresult result = GetCSSDeclaration(&decl, PR_FALSE);
aReturn.Truncate();
if (decl && decl->GetValueIsImportant(aPropertyName)) {
aReturn.AssignLiteral("important");
}
return result;
}
NS_IMETHODIMP
nsDOMCSSDeclaration::SetProperty(const nsAString& aPropertyName,
const nsAString& aValue,
const nsAString& aPriority)
{
// In the common (and fast) cases we can use the property id
nsCSSProperty propID = nsCSSProps::LookupProperty(aPropertyName);
if (propID == eCSSProperty_UNKNOWN) {
return NS_OK;
}
if (aValue.IsEmpty()) {
// If the new value of the property is an empty string we remove the
// property.
return RemoveProperty(propID);
}
if (aPriority.IsEmpty()) {
return ParsePropertyValue(propID, aValue);
}
// ParsePropertyValue does not handle priorities correctly -- it's
// optimized for speed. And the priority is not part of the
// property value anyway.... So we have to use the full-blown
// ParseDeclaration()
return ParseDeclaration(aPropertyName + NS_LITERAL_STRING(":") +
aValue + NS_LITERAL_STRING("!") + aPriority,
PR_TRUE, PR_FALSE);
}
NS_IMETHODIMP
nsDOMCSSDeclaration::RemoveProperty(const nsAString& aPropertyName,
nsAString& aReturn)
{
const nsCSSProperty propID = nsCSSProps::LookupProperty(aPropertyName);
if (propID == eCSSProperty_UNKNOWN) {
aReturn.Truncate();
return NS_OK;
}
nsresult rv = GetPropertyValue(propID, aReturn);
NS_ENSURE_SUCCESS(rv, rv);
rv = RemoveProperty(propID);
return rv;
}
nsresult
nsDOMCSSDeclaration::ParsePropertyValue(const nsCSSProperty aPropID,
const nsAString& aPropValue)
{
nsCSSDeclaration* decl;
nsresult result = GetCSSDeclaration(&decl, PR_TRUE);
if (!decl) {
return result;
}
nsCOMPtr<nsICSSLoader> cssLoader;
nsCOMPtr<nsICSSParser> cssParser;
nsCOMPtr<nsIURI> baseURI, sheetURI;
result = GetCSSParsingEnvironment(getter_AddRefs(sheetURI),
getter_AddRefs(baseURI),
getter_AddRefs(cssLoader),
getter_AddRefs(cssParser));
if (NS_FAILED(result)) {
return result;
}
PRBool changed;
result = cssParser->ParseProperty(aPropID, aPropValue, sheetURI, baseURI,
decl, &changed);
if (NS_SUCCEEDED(result) && changed) {
result = DeclarationChanged();
}
if (cssLoader) {
cssLoader->RecycleParser(cssParser);
}
return result;
}
nsresult
nsDOMCSSDeclaration::ParseDeclaration(const nsAString& aDecl,
PRBool aParseOnlyOneDecl,
PRBool aClearOldDecl)
{
nsCSSDeclaration* decl;
nsresult result = GetCSSDeclaration(&decl, PR_TRUE);
if (!decl) {
return result;
}
nsCOMPtr<nsICSSLoader> cssLoader;
nsCOMPtr<nsICSSParser> cssParser;
nsCOMPtr<nsIURI> baseURI, sheetURI;
result = GetCSSParsingEnvironment(getter_AddRefs(sheetURI),
getter_AddRefs(baseURI),
getter_AddRefs(cssLoader),
getter_AddRefs(cssParser));
if (NS_FAILED(result)) {
return result;
}
PRBool changed;
result = cssParser->ParseAndAppendDeclaration(aDecl, sheetURI, baseURI, decl,
aParseOnlyOneDecl,
&changed,
aClearOldDecl);
if (NS_SUCCEEDED(result) && changed) {
result = DeclarationChanged();
}
if (cssLoader) {
cssLoader->RecycleParser(cssParser);
}
return result;
}
nsresult
nsDOMCSSDeclaration::RemoveProperty(const nsCSSProperty aPropID)
{
nsCSSDeclaration* decl;
nsresult rv = GetCSSDeclaration(&decl, PR_FALSE);
if (!decl) {
return rv;
}
rv = decl->RemoveProperty(aPropID);
if (NS_SUCCEEDED(rv)) {
rv = DeclarationChanged();
} else {
// RemoveProperty used to throw in all sorts of situations -- e.g.
// if the property was a shorthand one. Do not propagate its return
// value to callers. (XXX or should we propagate it again now?)
rv = NS_OK;
}
return rv;
}
//////////////////////////////////////////////////////////////////////////////
CSS2PropertiesTearoff::CSS2PropertiesTearoff(nsICSSDeclaration *aOuter)
: mOuter(aOuter)
{
NS_ASSERTION(mOuter, "must have outer");
}
CSS2PropertiesTearoff::~CSS2PropertiesTearoff()
{
}
NS_IMETHODIMP_(nsrefcnt)
CSS2PropertiesTearoff::AddRef(void)
{
return mOuter->AddRef();
}
NS_IMETHODIMP_(nsrefcnt)
CSS2PropertiesTearoff::Release(void)
{
return mOuter->Release();
}
NS_IMETHODIMP
CSS2PropertiesTearoff::QueryInterface(REFNSIID aIID, void** aInstancePtr)
{
return mOuter->QueryInterface(aIID, aInstancePtr);
}
// nsIDOMCSS2Properties
// nsIDOMNSCSS2Properties
#define CSS_PROP(name_, id_, method_, datastruct_, member_, type_, iscoord_, kwtable_) \
NS_IMETHODIMP \
CSS2PropertiesTearoff::Get##method_(nsAString& aValue) \
{ \
return mOuter->GetPropertyValue(eCSSProperty_##id_, aValue); \
} \
\
NS_IMETHODIMP \
CSS2PropertiesTearoff::Set##method_(const nsAString& aValue) \
{ \
return mOuter->SetPropertyValue(eCSSProperty_##id_, aValue); \
}
#define CSS_PROP_NOTIMPLEMENTED(name_, id_, method_) \
NS_IMETHODIMP \
CSS2PropertiesTearoff::Get##method_(nsAString& aValue) \
{ \
aValue.Truncate(); \
return NS_OK; \
} \
\
NS_IMETHODIMP \
CSS2PropertiesTearoff::Set##method_(const nsAString& aValue) \
{ \
return NS_OK; \
}
#define CSS_PROP_LIST_EXCLUDE_INTERNAL
#define CSS_PROP_SHORTHAND(name_, id_, method_) \
CSS_PROP(name_, id_, method_, , , , ,)
#include "nsCSSPropList.h"
// Aliases
CSS_PROP(X, opacity, MozOpacity, X, X, X, X, X)
#undef CSS_PROP_SHORTHAND
#undef CSS_PROP_NOTIMPLEMENTED
#undef CSS_PROP_LIST_EXCLUDE_INTERNAL
#undef CSS_PROP