216 lines
6.6 KiB
C++
216 lines
6.6 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Netscape Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All
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* Rights Reserved.
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*
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* Contributor(s):
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*/
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#ifndef nsHTMLValue_h___
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#define nsHTMLValue_h___
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#include "nscore.h"
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#include "nsColor.h"
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#include "nsString.h"
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#include "nsISupports.h"
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#include "nsReadableUtils.h"
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enum nsHTMLUnit {
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eHTMLUnit_Null = 0, // (n/a) null unit, value is not specified
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eHTMLUnit_Empty = 1, // (n/a) empty unit, value is not specified
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eHTMLUnit_String = 10, // (nsString) a string value
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eHTMLUnit_ISupports = 20, // (nsISupports*) a ref counted interface
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eHTMLUnit_Integer = 50, // (int) simple value
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eHTMLUnit_Enumerated = 51, // (int) value has enumerated meaning
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eHTMLUnit_Proportional = 52, // (int) value is a relative proportion of some whole
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eHTMLUnit_Color = 80, // (color) an RGBA value
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eHTMLUnit_ColorName = 81, // (nsString/color) a color name value
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eHTMLUnit_Percent = 90, // (float) 1.0 == 100%) value is percentage of something
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// Screen relative measure
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eHTMLUnit_Pixel = 600 // (int) screen pixels
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};
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class nsHTMLValue {
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public:
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nsHTMLValue(nsHTMLUnit aUnit = eHTMLUnit_Null) : mUnit(aUnit)
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{
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NS_ASSERTION((aUnit <= eHTMLUnit_Empty), "not a valueless unit");
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if (aUnit > eHTMLUnit_Empty) {
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mUnit = eHTMLUnit_Null;
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}
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mValue.mString = nsnull;
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}
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nsHTMLValue(PRInt32 aValue, nsHTMLUnit aUnit);
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nsHTMLValue(float aValue);
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nsHTMLValue(const nsAReadableString& aValue,
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nsHTMLUnit aUnit = eHTMLUnit_String) : mUnit(aUnit)
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{
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NS_ASSERTION((eHTMLUnit_String == aUnit) ||
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(eHTMLUnit_ColorName == aUnit), "not a string value");
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if ((eHTMLUnit_String == aUnit) ||
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(eHTMLUnit_ColorName == aUnit)) {
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mValue.mString = ToNewUnicode(aValue);
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}
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else {
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mUnit = eHTMLUnit_Null;
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mValue.mInt = 0;
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}
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}
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nsHTMLValue(nsISupports* aValue);
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nsHTMLValue(nscolor aValue);
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nsHTMLValue(const nsHTMLValue& aCopy);
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~nsHTMLValue(void)
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{
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Reset();
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}
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nsHTMLValue& operator=(const nsHTMLValue& aCopy);
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PRBool operator==(const nsHTMLValue& aOther) const;
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PRBool operator!=(const nsHTMLValue& aOther) const;
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PRUint32 HashValue(void) const;
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nsHTMLUnit GetUnit(void) const { return mUnit; }
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PRInt32 GetIntValue(void) const;
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PRInt32 GetPixelValue(void) const;
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float GetPercentValue(void) const;
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nsAWritableString& GetStringValue(nsAWritableString& aBuffer) const;
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nsISupports* GetISupportsValue(void) const;
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nscolor GetColorValue(void) const;
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void Reset(void) {
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if ((eHTMLUnit_String == mUnit) || (eHTMLUnit_ColorName == mUnit)) {
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if (nsnull != mValue.mString) {
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nsCRT::free(mValue.mString);
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}
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}
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else if (eHTMLUnit_ISupports == mUnit) {
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NS_IF_RELEASE(mValue.mISupports);
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}
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mUnit = eHTMLUnit_Null;
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mValue.mString = nsnull;
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}
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void SetIntValue(PRInt32 aValue, nsHTMLUnit aUnit);
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void SetPixelValue(PRInt32 aValue);
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void SetPercentValue(float aValue);
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void SetStringValue(const nsAReadableString& aValue, nsHTMLUnit aUnit = eHTMLUnit_String);
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void SetISupportsValue(nsISupports* aValue);
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void SetColorValue(nscolor aValue);
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void SetEmptyValue(void);
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void AppendToString(nsAWritableString& aBuffer) const;
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void ToString(nsAWritableString& aBuffer) const;
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protected:
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nsHTMLUnit mUnit;
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union {
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PRInt32 mInt;
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float mFloat;
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PRUnichar* mString;
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nsISupports* mISupports;
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nscolor mColor;
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} mValue;
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};
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inline PRInt32 nsHTMLValue::GetIntValue(void) const
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{
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NS_ASSERTION((mUnit == eHTMLUnit_String) ||
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(mUnit == eHTMLUnit_Integer) ||
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(mUnit == eHTMLUnit_Enumerated) ||
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(mUnit == eHTMLUnit_Proportional), "not an int value");
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if ((mUnit == eHTMLUnit_Integer) ||
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(mUnit == eHTMLUnit_Enumerated) ||
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(mUnit == eHTMLUnit_Proportional)) {
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return mValue.mInt;
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}
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else if (mUnit == eHTMLUnit_String) {
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if (mValue.mString) {
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PRInt32 err=0;
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nsAutoString str(mValue.mString); // XXX copy. new string APIs will make this better, right?
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return str.ToInteger(&err);
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}
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}
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return 0;
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}
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inline PRInt32 nsHTMLValue::GetPixelValue(void) const
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{
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NS_ASSERTION((mUnit == eHTMLUnit_Pixel), "not a pixel value");
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if (mUnit == eHTMLUnit_Pixel) {
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return mValue.mInt;
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}
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return 0;
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}
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inline float nsHTMLValue::GetPercentValue(void) const
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{
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NS_ASSERTION(mUnit == eHTMLUnit_Percent, "not a percent value");
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if (mUnit == eHTMLUnit_Percent) {
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return mValue.mFloat;
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}
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return 0.0f;
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}
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inline nsAWritableString& nsHTMLValue::GetStringValue(nsAWritableString& aBuffer) const
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{
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NS_ASSERTION((mUnit == eHTMLUnit_String) || (mUnit == eHTMLUnit_ColorName) ||
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(mUnit == eHTMLUnit_Null), "not a string value");
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aBuffer.SetLength(0);
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if (((mUnit == eHTMLUnit_String) || (mUnit == eHTMLUnit_ColorName)) &&
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(nsnull != mValue.mString)) {
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aBuffer.Append(mValue.mString);
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}
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return aBuffer;
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}
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inline nsISupports* nsHTMLValue::GetISupportsValue(void) const
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{
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NS_ASSERTION(mUnit == eHTMLUnit_ISupports, "not an ISupports value");
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if (mUnit == eHTMLUnit_ISupports) {
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nsISupports *result = mValue.mISupports;
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NS_IF_ADDREF(result);
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return result;
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}
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return nsnull;
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}
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inline nscolor nsHTMLValue::GetColorValue(void) const
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{
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NS_ASSERTION((mUnit == eHTMLUnit_Color) || (mUnit == eHTMLUnit_ColorName),
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"not a color value");
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if (mUnit == eHTMLUnit_Color) {
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return mValue.mColor;
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}
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if ((mUnit == eHTMLUnit_ColorName) && (mValue.mString)) {
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nscolor color;
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if (NS_ColorNameToRGB(nsAutoString(mValue.mString), &color)) {
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return color;
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}
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}
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return NS_RGB(0,0,0);
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}
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inline PRBool nsHTMLValue::operator!=(const nsHTMLValue& aOther) const
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{
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return PRBool(! ((*this) == aOther));
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}
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#endif /* nsHTMLValue_h___ */
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