зеркало из https://github.com/mozilla/gecko-dev.git
153 строки
4.7 KiB
C++
153 строки
4.7 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 License
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* Version 1.0 (the "NPL"); you may not use this file except in
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* compliance with the NPL. You may obtain a copy of the NPL at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the NPL is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
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* for the specific language governing rights and limitations under the
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* NPL.
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*
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* The Initial Developer of this code under the NPL is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All Rights
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* Reserved.
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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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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_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);
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nsHTMLValue(PRInt32 aValue, nsHTMLUnit aUnit);
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nsHTMLValue(float aValue);
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nsHTMLValue(const nsString& aValue);
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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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nsHTMLValue& operator=(const nsHTMLValue& aCopy);
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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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nsString& GetStringValue(nsString& 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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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 nsString& aValue);
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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(nsString& aBuffer) const;
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void ToString(nsString& 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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nsString* mString;
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nsISupports* mISupports;
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nscolor mColor;
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} mValue;
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public:
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static const nsHTMLValue kNull;
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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_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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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 nsString& nsHTMLValue::GetStringValue(nsString& aBuffer) const
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{
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NS_ASSERTION((mUnit == eHTMLUnit_String) || (mUnit == eHTMLUnit_Null), "not a string value");
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aBuffer.SetLength(0);
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if ((mUnit == eHTMLUnit_String) && (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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NS_IF_ADDREF(mValue.mISupports);
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return mValue.mISupports;
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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, "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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return NS_RGB(0,0,0);
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}
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#endif /* nsHTMLValue_h___ */
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