gecko-dev/layout/style/nsDOMCSSDeclaration.cpp

299 строки
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Исходник Обычный вид История

/* -*- 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 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 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 "nsDOMCSSDeclaration.h"
#include "nsIDOMCSSRule.h"
#include "nsICSSParser.h"
#include "nsIStyleRule.h"
#include "nsCSSDeclaration.h"
#include "nsCSSProps.h"
#include "nsCOMPtr.h"
#include "nsIURL.h"
#include "nsContentUtils.h"
nsDOMCSSDeclaration::nsDOMCSSDeclaration()
: mInner(nsnull)
{
}
nsDOMCSSDeclaration::~nsDOMCSSDeclaration()
{
}
NS_IMETHODIMP
nsDOMCSSDeclaration::QueryInterface(REFNSIID aIID, void** aInstancePtr)
{
if (!aInstancePtr) {
NS_ERROR("QueryInterface requires a non-NULL destination!");
return NS_ERROR_NULL_POINTER;
}
nsISupports* inst;
if (aIID.Equals(NS_GET_IID(nsIDOMCSSStyleDeclaration))) {
inst = NS_STATIC_CAST(nsIDOMCSSStyleDeclaration*, this);
} else if (aIID.Equals(NS_GET_IID(nsIDOMCSS2Properties))) {
if (!mInner) {
mInner = new CSS2PropertiesTearoff(this);
NS_ENSURE_TRUE(mInner, NS_ERROR_OUT_OF_MEMORY);
}
inst = NS_STATIC_CAST(nsIDOMCSS2Properties*,
NS_STATIC_CAST(nsISupports*, mInner));
} else if (aIID.Equals(NS_GET_IID(nsIDOMNSCSS2Properties))) {
if (!mInner) {
mInner = new CSS2PropertiesTearoff(this);
NS_ENSURE_TRUE(mInner, NS_ERROR_OUT_OF_MEMORY);
}
inst = NS_STATIC_CAST(nsIDOMNSCSS2Properties*,
NS_STATIC_CAST(nsISupports*, mInner));
} else if (aIID.Equals(NS_GET_IID(nsISupports))) {
inst = NS_STATIC_CAST(nsISupports*,
NS_STATIC_CAST(nsIDOMCSSStyleDeclaration*, this));
} else if (aIID.Equals(NS_GET_IID(nsIClassInfo))) {
inst = nsContentUtils::GetClassInfoInstance(eDOMClassInfo_CSSStyleDeclaration_id);
NS_ENSURE_TRUE(inst, NS_ERROR_OUT_OF_MEMORY);
} else {
inst = nsnull;
}
nsresult rv;
if (!inst) {
rv = NS_NOINTERFACE;
} else {
NS_ADDREF(inst);
rv = NS_OK;
}
*aInstancePtr = inst;
return rv;
}
NS_IMPL_ADDREF(nsDOMCSSDeclaration);
NS_IMPL_RELEASE(nsDOMCSSDeclaration);
NS_IMETHODIMP
nsDOMCSSDeclaration::GetCssText(nsAString& aCssText)
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{
nsCSSDeclaration* decl;
aCssText.Truncate();
GetCSSDeclaration(&decl, PR_FALSE);
NS_ASSERTION(decl, "null CSSDeclaration");
if (decl) {
decl->ToString(aCssText);
}
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return NS_OK;
}
NS_IMETHODIMP
nsDOMCSSDeclaration::SetCssText(const nsAString& aCssText)
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{
return ParseDeclaration(aCssText, PR_FALSE, PR_TRUE);
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}
NS_IMETHODIMP
nsDOMCSSDeclaration::GetLength(PRUint32* aLength)
{
nsCSSDeclaration *decl;
nsresult result = GetCSSDeclaration(&decl, PR_FALSE);
*aLength = 0;
if ((NS_OK == result) && (nsnull != decl)) {
*aLength = decl->Count();
}
return result;
}
NS_IMETHODIMP
nsDOMCSSDeclaration::GetParentRule(nsIDOMCSSRule** aParentRule)
{
NS_ENSURE_ARG_POINTER(aParentRule);
*aParentRule = nsnull;
nsCOMPtr<nsISupports> parent;
GetParent(getter_AddRefs(parent));
if (parent) {
CallQueryInterface(parent, aParentRule);
}
return NS_OK;
}
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 ((NS_OK == result) && (nsnull != decl)) {
result = decl->GetNthProperty(aIndex, aReturn);
}
return result;
}
NS_IMETHODIMP
nsDOMCSSDeclaration::GetPropertyValue(const nsAString& aPropertyName,
nsAString& aReturn)
{
nsCSSValue val;
nsCSSDeclaration *decl;
nsresult result = GetCSSDeclaration(&decl, PR_FALSE);
aReturn.SetLength(0);
if ((NS_OK == result) && (nsnull != decl)) {
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result = decl->GetValue(aPropertyName, aReturn);
}
return result;
}
NS_IMETHODIMP
nsDOMCSSDeclaration::GetPropertyPriority(const nsAString& aPropertyName,
nsAString& aReturn)
{
nsCSSDeclaration *decl;
nsresult result = GetCSSDeclaration(&decl, PR_FALSE);
PRBool isImportant = PR_FALSE;
if ((NS_OK == result) && (nsnull != decl)) {
isImportant = decl->GetValueIsImportant(aPropertyName);
}
if ((NS_OK == result) && isImportant) {
aReturn.Assign(NS_LITERAL_STRING("important"));
}
else {
aReturn.SetLength(0);
}
return result;
}
NS_IMETHODIMP
nsDOMCSSDeclaration::SetProperty(const nsAString& aPropertyName,
const nsAString& aValue,
const nsAString& aPriority)
{
if (aValue.IsEmpty()) {
// If the new value of the property is an empty string we remove the
// property.
nsAutoString tmp;
return RemoveProperty(aPropertyName, tmp);
}
if (aPriority.IsEmpty()) {
return ParsePropertyValue(aPropertyName, 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);
}
//////////////////////////////////////////////////////////////////////////////
CSS2PropertiesTearoff::CSS2PropertiesTearoff(nsISupports *aOuter)
{
NS_INIT_AGGREGATED(aOuter);
}
CSS2PropertiesTearoff::~CSS2PropertiesTearoff()
{
}
NS_IMPL_AGGREGATED(CSS2PropertiesTearoff);
NS_INTERFACE_MAP_BEGIN_AGGREGATED(CSS2PropertiesTearoff)
NS_INTERFACE_MAP_ENTRY(nsIDOMCSS2Properties)
NS_INTERFACE_MAP_ENTRY(nsIDOMNSCSS2Properties)
NS_INTERFACE_MAP_END_AGGREGATED(fOuter)
// nsIDOMCSS2Properties
// nsIDOMNSCSS2Properties
#define CSS_PROP(name_, id_, method_, hint_) \
NS_IMETHODIMP \
CSS2PropertiesTearoff::Get##method_(nsAString& aValue) \
{ \
return NS_STATIC_CAST(nsIDOMCSSStyleDeclaration*, fOuter)-> \
GetPropertyValue(NS_LITERAL_STRING(#name_), aValue); \
} \
\
NS_IMETHODIMP \
CSS2PropertiesTearoff::Set##method_(const nsAString& aValue) \
{ \
return NS_STATIC_CAST(nsIDOMCSSStyleDeclaration*, fOuter)-> \
SetProperty(NS_LITERAL_STRING(#name_), aValue, \
NS_LITERAL_STRING("")); \
}
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#define CSS_PROP_INTERNAL(name_, id_, method_, hint_) /* nothing */
#define CSS_PROP_NOTIMPLEMENTED(name_, id_, method_, hint_) \
CSS_PROP(name_, id_, method_, hint_)
#include "nsCSSPropList.h"
#undef CSS_PROP_INTERNAL
#undef CSS_PROP