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):
* Mats Palmgren <mats.palmgren@bredband.net>
*
* 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 ***** */
/* base class for DOM objects for element.style and cssStyleRule.style */
#include "nsDOMCSSDeclaration.h"
#include "nsIDOMCSSRule.h"
#include "nsCSSParser.h"
#include "nsCSSLoader.h"
#include "nsIStyleRule.h"
#include "nsCSSDeclaration.h"
#include "nsCSSProps.h"
#include "nsCOMPtr.h"
#include "nsIURL.h"
#include "nsReadableUtils.h"
#include "nsIPrincipal.h"
#include "nsContentUtils.h"
#include "mozAutoDocUpdate.h"
namespace css = mozilla::css;
nsDOMCSSDeclaration::~nsDOMCSSDeclaration()
{
}
DOMCI_DATA(CSSStyleDeclaration, nsDOMCSSDeclaration)
NS_INTERFACE_TABLE_HEAD(nsDOMCSSDeclaration)
NS_OFFSET_AND_INTERFACE_TABLE_BEGIN(nsDOMCSSDeclaration)
NS_INTERFACE_TABLE_ENTRY(nsDOMCSSDeclaration, nsICSSDeclaration)
NS_INTERFACE_TABLE_ENTRY(nsDOMCSSDeclaration, nsIDOMCSSStyleDeclaration)
NS_INTERFACE_TABLE_ENTRY(nsDOMCSSDeclaration, nsISupports)
NS_OFFSET_AND_INTERFACE_TABLE_END
NS_OFFSET_AND_INTERFACE_TABLE_TO_MAP_SEGUE
NS_INTERFACE_MAP_ENTRY_AGGREGATED(nsIDOMCSS2Properties,
new CSS2PropertiesTearoff(this))
NS_INTERFACE_MAP_ENTRY_AGGREGATED(nsIDOMSVGCSS2Properties,
new CSS2PropertiesTearoff(this))
NS_INTERFACE_MAP_ENTRY_AGGREGATED(nsIDOMNSCSS2Properties,
new CSS2PropertiesTearoff(this))
NS_DOM_INTERFACE_MAP_ENTRY_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, PR_FALSE);
}
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.
// XXX this ignores the priority string, should it?
return RemoveProperty(propID);
}
if (aPriority.IsEmpty()) {
return ParsePropertyValue(propID, aValue, PR_FALSE);
}
if (aPriority.EqualsLiteral("important")) {
return ParsePropertyValue(propID, aValue, PR_TRUE);
}
// XXX silent failure?
return NS_OK;
}
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,
PRBool aIsImportant)
{
nsCSSDeclaration* decl;
nsresult result = GetCSSDeclaration(&decl, PR_TRUE);
if (!decl) {
return result;
}
nsRefPtr<css::Loader> cssLoader;
nsCOMPtr<nsIURI> baseURI, sheetURI;
nsCOMPtr<nsIPrincipal> sheetPrincipal;
result = GetCSSParsingEnvironment(getter_AddRefs(sheetURI),
getter_AddRefs(baseURI),
getter_AddRefs(sheetPrincipal),
getter_AddRefs(cssLoader));
if (NS_FAILED(result)) {
return result;
}
// For nsDOMCSSAttributeDeclaration, DeclarationChanged will lead to
// Attribute setting code, which leads in turn to BeginUpdate. We
// need to start the update now so that the old rule doesn't get used
// between when we mutate the declaration and when we set the new
// rule (see stack in bug 209575).
mozAutoDocConditionalContentUpdateBatch autoUpdate(DocToUpdate(), PR_TRUE);
nsCSSParser cssParser(cssLoader);
PRBool changed;
result = cssParser.ParseProperty(aPropID, aPropValue, sheetURI, baseURI,
sheetPrincipal, decl, &changed,
aIsImportant);
if (NS_SUCCEEDED(result) && changed) {
result = DeclarationChanged();
}
return result;
}
nsresult
nsDOMCSSDeclaration::ParseDeclaration(const nsAString& aDecl,
PRBool aParseOnlyOneDecl,
PRBool aClearOldDecl)
{
nsCSSDeclaration* decl;
nsresult result = GetCSSDeclaration(&decl, PR_TRUE);
if (!decl) {
return result;
}
nsRefPtr<css::Loader> cssLoader;
nsCOMPtr<nsIURI> baseURI, sheetURI;
nsCOMPtr<nsIPrincipal> sheetPrincipal;
result = GetCSSParsingEnvironment(getter_AddRefs(sheetURI),
getter_AddRefs(baseURI),
getter_AddRefs(sheetPrincipal),
getter_AddRefs(cssLoader));
if (NS_FAILED(result)) {
return result;
}
// For nsDOMCSSAttributeDeclaration, DeclarationChanged will lead to
// Attribute setting code, which leads in turn to BeginUpdate. We
// need to start the update now so that the old rule doesn't get used
// between when we mutate the declaration and when we set the new
// rule (see stack in bug 209575).
mozAutoDocConditionalContentUpdateBatch autoUpdate(DocToUpdate(), PR_TRUE);
nsCSSParser cssParser(cssLoader);
PRBool changed;
result = cssParser.ParseAndAppendDeclaration(aDecl, sheetURI, baseURI,
sheetPrincipal, decl,
aParseOnlyOneDecl,
&changed,
aClearOldDecl);
if (NS_SUCCEEDED(result) && changed) {
result = DeclarationChanged();
}
return result;
}
nsresult
nsDOMCSSDeclaration::RemoveProperty(const nsCSSProperty aPropID)
{
nsCSSDeclaration* decl;
nsresult rv = GetCSSDeclaration(&decl, PR_FALSE);
if (!decl) {
return rv;
}
// For nsDOMCSSAttributeDeclaration, DeclarationChanged will lead to
// Attribute setting code, which leads in turn to BeginUpdate. We
// need to start the update now so that the old rule doesn't get used
// between when we mutate the declaration and when we set the new
// rule (see stack in bug 209575).
mozAutoDocConditionalContentUpdateBatch autoUpdate(DocToUpdate(), PR_TRUE);
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_IMPL_CYCLE_COLLECTION_1(CSS2PropertiesTearoff, mOuter)
NS_IMPL_CYCLE_COLLECTING_ADDREF(CSS2PropertiesTearoff)
NS_IMPL_CYCLE_COLLECTING_RELEASE(CSS2PropertiesTearoff)
NS_INTERFACE_TABLE_HEAD(CSS2PropertiesTearoff)
NS_INTERFACE_TABLE_INHERITED3(CSS2PropertiesTearoff,
nsIDOMCSS2Properties,
nsIDOMSVGCSS2Properties,
nsIDOMNSCSS2Properties)
NS_INTERFACE_TABLE_TO_MAP_SEGUE_CYCLE_COLLECTION(CSS2PropertiesTearoff)
NS_INTERFACE_MAP_END_AGGREGATED(mOuter)
// nsIDOMCSS2Properties
// nsIDOMSVGCSS2Properties
// nsIDOMNSCSS2Properties
#define CSS_PROP(name_, id_, method_, flags_, datastruct_, member_, type_, \
kwtable_, stylestruct_, stylestructoffset_, animtype_) \
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_LIST_EXCLUDE_INTERNAL
#define CSS_PROP_SHORTHAND(name_, id_, method_, flags_) \
CSS_PROP(name_, id_, method_, flags_, X, X, X, X, X, X, X)
#include "nsCSSPropList.h"
// Aliases
CSS_PROP(X, opacity, MozOpacity, 0, X, X, X, X, X, X, X)
CSS_PROP(X, outline, MozOutline, 0, X, X, X, X, X, X, X)
CSS_PROP(X, outline_color, MozOutlineColor, 0, X, X, X, X, X, X, X)
CSS_PROP(X, outline_style, MozOutlineStyle, 0, X, X, X, X, X, X, X)
CSS_PROP(X, outline_width, MozOutlineWidth, 0, X, X, X, X, X, X, X)
CSS_PROP(X, outline_offset, MozOutlineOffset, 0, X, X, X, X, X, X, X)
#undef CSS_PROP_SHORTHAND
#undef CSS_PROP_LIST_EXCLUDE_INTERNAL
#undef CSS_PROP