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gecko-dev/layout/style/nsROCSSPrimitiveValue.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.org 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 ***** */
/* DOM object representing values in DOM computed style */
#include "nsROCSSPrimitiveValue.h"
#include "nsCOMPtr.h"
#include "nsDOMError.h"
#include "prprf.h"
#include "nsContentUtils.h"
#include "nsXPIDLString.h"
#include "nsCRT.h"
#include "nsPresContext.h"
nsROCSSPrimitiveValue::nsROCSSPrimitiveValue(PRInt32 aAppUnitsPerInch)
: mType(CSS_PX), mAppUnitsPerInch(aAppUnitsPerInch)
{
mValue.mAppUnits = 0;
}
nsROCSSPrimitiveValue::~nsROCSSPrimitiveValue()
{
Reset();
}
void
nsROCSSPrimitiveValue::GetEscapedURI(nsIURI *aURI, PRUnichar **aReturn)
{
nsCAutoString specUTF8;
aURI->GetSpec(specUTF8);
NS_ConvertUTF8toUTF16 spec(specUTF8);
PRUint16 length = spec.Length();
PRUnichar *escaped = (PRUnichar *)nsMemory::Alloc(length * 2 * sizeof(PRUnichar) + sizeof(PRUnichar('\0')));
if (escaped) {
PRUnichar *ptr = escaped;
for (PRUint16 i = 0; i < length; ++i) {
switch (spec[i]) {
case ' ' : // space
case '\t': // tab
case '(' : // opening parenthesis
case ')' : // closing parenthesis
case '\'': // single quote
case '"' : // double quote
case ',' : // comma
case '\\': // backslash
// We have one of the above special characters.
// Prepend it with a backslash.
*ptr++ = '\\';
break;
default:
break;
}
*ptr++ = spec[i];
}
*ptr = 0;
}
*aReturn = escaped;
}
NS_IMPL_ADDREF(nsROCSSPrimitiveValue)
NS_IMPL_RELEASE(nsROCSSPrimitiveValue)
// QueryInterface implementation for nsROCSSPrimitiveValue
NS_INTERFACE_MAP_BEGIN(nsROCSSPrimitiveValue)
NS_INTERFACE_MAP_ENTRY(nsIDOMCSSPrimitiveValue)
NS_INTERFACE_MAP_ENTRY(nsIDOMCSSValue)
NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIDOMCSSPrimitiveValue)
NS_INTERFACE_MAP_ENTRY_CONTENT_CLASSINFO(ROCSSPrimitiveValue)
NS_INTERFACE_MAP_END
// nsIDOMCSSValue
NS_IMETHODIMP
nsROCSSPrimitiveValue::GetCssText(nsAString& aCssText)
{
nsAutoString tmpStr;
aCssText.Truncate();
nsresult result = NS_OK;
switch (mType) {
case CSS_PX :
{
float val = nsPresContext::AppUnitsToFloatCSSPixels(mValue.mAppUnits);
tmpStr.AppendFloat(val);
tmpStr.AppendLiteral("px");
break;
}
case CSS_IDENT :
{
const char *atomValue;
mValue.mAtom->GetUTF8String(&atomValue);
AppendUTF8toUTF16(atomValue, tmpStr);
break;
}
case CSS_STRING :
{
tmpStr.Append(mValue.mString);
break;
}
case CSS_URI :
{
nsXPIDLString uri;
if (mValue.mURI) {
GetEscapedURI(mValue.mURI, getter_Copies(uri));
tmpStr.Assign(NS_LITERAL_STRING("url(") +
uri +
NS_LITERAL_STRING(")"));
} else {
// XXXldb Any better ideas? It's good to have something that
// doesn't parse so that things round-trip "correctly".
tmpStr.Assign(NS_LITERAL_STRING("url(invalid-url:)"));
}
break;
}
case CSS_PERCENTAGE :
{
tmpStr.AppendFloat(mValue.mFloat * 100);
tmpStr.Append(PRUnichar('%'));
break;
}
case CSS_NUMBER :
{
tmpStr.AppendFloat(mValue.mFloat);
break;
}
case CSS_RECT :
{
NS_ASSERTION(mValue.mRect, "mValue.mRect should never be null");
NS_NAMED_LITERAL_STRING(comma, ", ");
nsCOMPtr<nsIDOMCSSPrimitiveValue> sideCSSValue;
nsAutoString sideValue;
tmpStr.AssignLiteral("rect(");
// get the top
result = mValue.mRect->GetTop(getter_AddRefs(sideCSSValue));
if (NS_FAILED(result))
break;
result = sideCSSValue->GetCssText(sideValue);
if (NS_FAILED(result))
break;
tmpStr.Append(sideValue + comma);
// get the right
result = mValue.mRect->GetRight(getter_AddRefs(sideCSSValue));
if (NS_FAILED(result))
break;
result = sideCSSValue->GetCssText(sideValue);
if (NS_FAILED(result))
break;
tmpStr.Append(sideValue + comma);
// get the bottom
result = mValue.mRect->GetBottom(getter_AddRefs(sideCSSValue));
if (NS_FAILED(result))
break;
result = sideCSSValue->GetCssText(sideValue);
if (NS_FAILED(result))
break;
tmpStr.Append(sideValue + comma);
// get the left
result = mValue.mRect->GetLeft(getter_AddRefs(sideCSSValue));
if (NS_FAILED(result))
break;
result = sideCSSValue->GetCssText(sideValue);
if (NS_FAILED(result))
break;
tmpStr.Append(sideValue + NS_LITERAL_STRING(")"));
break;
}
case CSS_RGBCOLOR :
{
NS_ASSERTION(mValue.mColor, "mValue.mColor should never be null");
NS_NAMED_LITERAL_STRING(comma, ", ");
nsCOMPtr<nsIDOMCSSPrimitiveValue> colorCSSValue;
nsAutoString colorValue;
if (mValue.mColor->HasAlpha())
tmpStr.AssignLiteral("rgba(");
else
tmpStr.AssignLiteral("rgb(");
// get the red component
result = mValue.mColor->GetRed(getter_AddRefs(colorCSSValue));
if (NS_FAILED(result))
break;
result = colorCSSValue->GetCssText(colorValue);
if (NS_FAILED(result))
break;
tmpStr.Append(colorValue + comma);
// get the green component
result = mValue.mColor->GetGreen(getter_AddRefs(colorCSSValue));
if (NS_FAILED(result))
break;
result = colorCSSValue->GetCssText(colorValue);
if (NS_FAILED(result))
break;
tmpStr.Append(colorValue + comma);
// get the blue component
result = mValue.mColor->GetBlue(getter_AddRefs(colorCSSValue));
if (NS_FAILED(result))
break;
result = colorCSSValue->GetCssText(colorValue);
if (NS_FAILED(result))
break;
tmpStr.Append(colorValue);
if (mValue.mColor->HasAlpha()) {
// get the alpha component
result = mValue.mColor->GetAlpha(getter_AddRefs(colorCSSValue));
if (NS_FAILED(result))
break;
result = colorCSSValue->GetCssText(colorValue);
if (NS_FAILED(result))
break;
tmpStr.Append(comma + colorValue);
}
tmpStr.Append(NS_LITERAL_STRING(")"));
break;
}
case CSS_CM :
case CSS_MM :
case CSS_IN :
case CSS_PT :
case CSS_PC :
case CSS_UNKNOWN :
case CSS_EMS :
case CSS_EXS :
case CSS_DEG :
case CSS_RAD :
case CSS_GRAD :
case CSS_MS :
case CSS_S :
case CSS_HZ :
case CSS_KHZ :
case CSS_DIMENSION :
case CSS_ATTR :
case CSS_COUNTER :
NS_ERROR("We have a bogus value set. This should not happen");
return NS_ERROR_DOM_INVALID_ACCESS_ERR;
}
if (NS_SUCCEEDED(result)) {
aCssText.Assign(tmpStr);
}
return NS_OK;
}
NS_IMETHODIMP
nsROCSSPrimitiveValue::SetCssText(const nsAString& aCssText)
{
return NS_ERROR_DOM_NO_MODIFICATION_ALLOWED_ERR;
}
NS_IMETHODIMP
nsROCSSPrimitiveValue::GetCssValueType(PRUint16* aValueType)
{
NS_ENSURE_ARG_POINTER(aValueType);
*aValueType = nsIDOMCSSValue::CSS_PRIMITIVE_VALUE;
return NS_OK;
}
// nsIDOMCSSPrimitiveValue
NS_IMETHODIMP
nsROCSSPrimitiveValue::GetPrimitiveType(PRUint16* aPrimitiveType)
{
NS_ENSURE_ARG_POINTER(aPrimitiveType);
*aPrimitiveType = mType;
return NS_OK;
}
NS_IMETHODIMP
nsROCSSPrimitiveValue::SetFloatValue(PRUint16 aUnitType, float aFloatValue)
{
return NS_ERROR_DOM_NO_MODIFICATION_ALLOWED_ERR;
}
NS_IMETHODIMP
nsROCSSPrimitiveValue::GetFloatValue(PRUint16 aUnitType, float* aReturn)
{
NS_ENSURE_ARG_POINTER(aReturn);
*aReturn = 0;
switch(aUnitType) {
case CSS_PX :
if (mType != CSS_PX)
return NS_ERROR_DOM_INVALID_ACCESS_ERR;
*aReturn = nsPresContext::AppUnitsToFloatCSSPixels(mValue.mAppUnits);
break;
case CSS_CM :
if (mType != CSS_PX)
return NS_ERROR_DOM_INVALID_ACCESS_ERR;
*aReturn = mValue.mAppUnits * 2.54f / float(mAppUnitsPerInch);
break;
case CSS_MM :
if (mType != CSS_PX)
return NS_ERROR_DOM_INVALID_ACCESS_ERR;
*aReturn = mValue.mAppUnits * 25.4f / float(mAppUnitsPerInch);
break;
case CSS_IN :
if (mType != CSS_PX)
return NS_ERROR_DOM_INVALID_ACCESS_ERR;
*aReturn = mValue.mAppUnits / float(mAppUnitsPerInch);
break;
case CSS_PT :
if (mType != CSS_PX)
return NS_ERROR_DOM_INVALID_ACCESS_ERR;
*aReturn = mValue.mAppUnits * 72.0f / float(mAppUnitsPerInch);
break;
case CSS_PC :
if (mType != CSS_PX)
return NS_ERROR_DOM_INVALID_ACCESS_ERR;
*aReturn = mValue.mAppUnits * 6.0f / float(mAppUnitsPerInch);
break;
case CSS_PERCENTAGE :
if (mType != CSS_PERCENTAGE)
return NS_ERROR_DOM_INVALID_ACCESS_ERR;
*aReturn = mValue.mFloat * 100;
break;
case CSS_NUMBER :
if (mType != CSS_NUMBER)
return NS_ERROR_DOM_INVALID_ACCESS_ERR;
*aReturn = mValue.mFloat;
break;
case CSS_UNKNOWN :
case CSS_EMS :
case CSS_EXS :
case CSS_DEG :
case CSS_RAD :
case CSS_GRAD :
case CSS_MS :
case CSS_S :
case CSS_HZ :
case CSS_KHZ :
case CSS_DIMENSION :
case CSS_STRING :
case CSS_URI :
case CSS_IDENT :
case CSS_ATTR :
case CSS_COUNTER :
case CSS_RECT :
case CSS_RGBCOLOR :
return NS_ERROR_DOM_INVALID_ACCESS_ERR;
}
return NS_OK;
}
NS_IMETHODIMP
nsROCSSPrimitiveValue::SetStringValue(PRUint16 aStringType,
const nsAString& aStringValue)
{
return NS_ERROR_DOM_NO_MODIFICATION_ALLOWED_ERR;
}
NS_IMETHODIMP
nsROCSSPrimitiveValue::GetStringValue(nsAString& aReturn)
{
switch (mType) {
case CSS_IDENT:
mValue.mAtom->ToString(aReturn);
break;
case CSS_STRING:
aReturn.Assign(mValue.mString);
break;
case CSS_URI: {
nsCAutoString spec;
if (mValue.mURI)
mValue.mURI->GetSpec(spec);
CopyUTF8toUTF16(spec, aReturn);
} break;
case CSS_ATTR:
default:
aReturn.Truncate();
return NS_ERROR_DOM_INVALID_ACCESS_ERR;
}
return NS_OK;
}
NS_IMETHODIMP
nsROCSSPrimitiveValue::GetCounterValue(nsIDOMCounter** aReturn)
{
return NS_ERROR_DOM_NO_MODIFICATION_ALLOWED_ERR;
}
NS_IMETHODIMP
nsROCSSPrimitiveValue::GetRectValue(nsIDOMRect** aReturn)
{
if (mType != CSS_RECT) {
*aReturn = nsnull;
return NS_ERROR_DOM_INVALID_ACCESS_ERR;
}
NS_ASSERTION(mValue.mRect, "mValue.mRect should never be null");
return CallQueryInterface(mValue.mRect, aReturn);
}
NS_IMETHODIMP
nsROCSSPrimitiveValue::GetRGBColorValue(nsIDOMRGBColor** aReturn)
{
if (mType != CSS_RGBCOLOR) {
*aReturn = nsnull;
return NS_ERROR_DOM_INVALID_ACCESS_ERR;
}
NS_ASSERTION(mValue.mColor, "mValue.mColor should never be null");
return CallQueryInterface(mValue.mColor, aReturn);
}
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