зеркало из https://github.com/mozilla/gecko-dev.git
343 строки
11 KiB
C++
343 строки
11 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: NPL 1.1/GPL 2.0/LGPL 2.1
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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 1.1 (the "License"); you may not use this file except in
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* compliance with the License. You may obtain a copy of the License at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* 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
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the NPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the NPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#ifndef nsCSSValue_h___
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#define nsCSSValue_h___
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#include "nsColor.h"
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#include "nsString.h"
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#include "nsCRT.h"
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#include "nsCoord.h"
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#include "nsCSSProperty.h"
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#include "nsUnitConversion.h"
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#include "nsIURI.h"
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#include "nsCOMPtr.h"
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#include "nsAutoPtr.h"
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class imgIRequest;
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class nsIDocument;
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enum nsCSSUnit {
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eCSSUnit_Null = 0, // (n/a) null unit, value is not specified
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eCSSUnit_Auto = 1, // (n/a) value is algorithmic
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eCSSUnit_Inherit = 2, // (n/a) value is inherited
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eCSSUnit_Initial = 3, // (n/a) value is default UA value
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eCSSUnit_None = 4, // (n/a) value is none
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eCSSUnit_Normal = 5, // (n/a) value is normal (algorithmic, different than auto)
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eCSSUnit_String = 10, // (PRUnichar*) a string value
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eCSSUnit_Attr = 11, // (PRUnichar*) a attr(string) value
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eCSSUnit_Counter = 12, // (PRUnichar*) a counter(string,[string]) value
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eCSSUnit_Counters = 13, // (PRUnichar*) a counters(string,string[,string]) value
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eCSSUnit_URL = 14, // (nsCSSValue::URL*) value
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eCSSUnit_Image = 15, // (nsCSSValue::Image*) value
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eCSSUnit_Integer = 50, // (int) simple value
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eCSSUnit_Enumerated = 51, // (int) value has enumerated meaning
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eCSSUnit_Color = 80, // (color) an RGBA value
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eCSSUnit_Percent = 90, // (float) 1.0 == 100%) value is percentage of something
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eCSSUnit_Number = 91, // (float) value is numeric (usually multiplier, different behavior that percent)
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// Length units - fixed
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// US English
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eCSSUnit_Inch = 100, // (float) Standard length
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eCSSUnit_Foot = 101, // (float) 12 inches
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eCSSUnit_Mile = 102, // (float) 5280 feet
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// Metric
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eCSSUnit_Millimeter = 207, // (float) 1/1000 meter
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eCSSUnit_Centimeter = 208, // (float) 1/100 meter
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eCSSUnit_Meter = 210, // (float) Standard length
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eCSSUnit_Kilometer = 213, // (float) 1000 meters
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// US Typographic
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eCSSUnit_Point = 300, // (float) 1/72 inch
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eCSSUnit_Pica = 301, // (float) 12 points == 1/6 inch
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// European Typographic
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eCSSUnit_Didot = 400, // (float) 15 didots == 16 points
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eCSSUnit_Cicero = 401, // (float) 12 didots
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// Length units - relative
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// Font relative measure
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eCSSUnit_EM = 800, // (float) == current font size
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eCSSUnit_EN = 801, // (float) .5 em
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eCSSUnit_XHeight = 802, // (float) distance from top of lower case x to baseline
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eCSSUnit_CapHeight = 803, // (float) distance from top of uppercase case H to baseline
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eCSSUnit_Char = 804, // (float) number of characters, used for width with monospace font
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// Screen relative measure
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eCSSUnit_Pixel = 900, // (float)
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// Proportional Unit (for columns in tables)
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eCSSUnit_Proportional = 950,
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// Angular units
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eCSSUnit_Degree = 1000, // (float) 360 per circle
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eCSSUnit_Grad = 1001, // (float) 400 per circle
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eCSSUnit_Radian = 1002, // (float) 2pi per circle
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// Frequency units
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eCSSUnit_Hertz = 2000, // (float)
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eCSSUnit_Kilohertz = 2001, // (float)
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// Time units
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eCSSUnit_Seconds = 3000, // (float)
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eCSSUnit_Milliseconds = 3001 // (float)
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};
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class nsCSSValue {
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public:
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struct URL;
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friend struct URL;
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struct Image;
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friend struct Image;
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// for valueless units only (null, auto, inherit, none, normal)
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nsCSSValue(nsCSSUnit aUnit = eCSSUnit_Null)
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: mUnit(aUnit)
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{
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NS_ASSERTION(aUnit <= eCSSUnit_Normal, "not a valueless unit");
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if (aUnit > eCSSUnit_Normal) {
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mUnit = eCSSUnit_Null;
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}
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mValue.mInt = 0;
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}
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nsCSSValue(PRInt32 aValue, nsCSSUnit aUnit);
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nsCSSValue(float aValue, nsCSSUnit aUnit);
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nsCSSValue(const nsAString& aValue, nsCSSUnit aUnit);
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nsCSSValue(nscolor aValue);
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nsCSSValue(URL* aValue);
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nsCSSValue(Image* aValue);
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nsCSSValue(const nsCSSValue& aCopy);
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~nsCSSValue();
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nsCSSValue& operator=(const nsCSSValue& aCopy);
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PRBool operator==(const nsCSSValue& aOther) const;
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PRBool operator!=(const nsCSSValue& aOther) const
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{
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return !(*this == aOther);
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}
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nsCSSUnit GetUnit() const { return mUnit; };
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PRBool IsLengthUnit() const
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{ return PRBool((eCSSUnit_Inch <= mUnit) && (mUnit <= eCSSUnit_Proportional)); }
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PRBool IsFixedLengthUnit() const
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{ return PRBool((eCSSUnit_Inch <= mUnit) && (mUnit <= eCSSUnit_Cicero)); }
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PRBool IsRelativeLengthUnit() const
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{ return PRBool((eCSSUnit_EM <= mUnit) && (mUnit <= eCSSUnit_Proportional)); }
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PRBool IsAngularUnit() const
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{ return PRBool((eCSSUnit_Degree <= mUnit) && (mUnit <= eCSSUnit_Radian)); }
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PRBool IsFrequencyUnit() const
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{ return PRBool((eCSSUnit_Hertz <= mUnit) && (mUnit <= eCSSUnit_Kilohertz)); }
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PRBool IsTimeUnit() const
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{ return PRBool((eCSSUnit_Seconds <= mUnit) && (mUnit <= eCSSUnit_Milliseconds)); }
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PRInt32 GetIntValue() const
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{
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NS_ASSERTION(mUnit == eCSSUnit_Integer || mUnit == eCSSUnit_Enumerated,
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"not an int value");
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return mValue.mInt;
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}
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float GetPercentValue() const
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{
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NS_ASSERTION(mUnit == eCSSUnit_Percent, "not a percent value");
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return mValue.mFloat;
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}
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float GetFloatValue() const
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{
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NS_ASSERTION(eCSSUnit_Number <= mUnit, "not a float value");
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return mValue.mFloat;
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}
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nsAString& GetStringValue(nsAString& aBuffer) const
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{
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NS_ASSERTION(eCSSUnit_String <= mUnit && mUnit <= eCSSUnit_Counters,
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"not a string value");
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aBuffer.Truncate();
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if (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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const PRUnichar* GetStringBufferValue() const
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{
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NS_ASSERTION(eCSSUnit_String <= mUnit && mUnit <= eCSSUnit_Counters,
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"not a string value");
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return mValue.mString;
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}
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nscolor GetColorValue() const
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{
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NS_ASSERTION((mUnit == eCSSUnit_Color), "not a color value");
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return mValue.mColor;
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}
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nsIURI* GetURLValue() const
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{
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NS_ASSERTION(mUnit == eCSSUnit_URL || mUnit == eCSSUnit_Image,
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"not a URL value");
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return mUnit == eCSSUnit_URL ?
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mValue.mURL->mURI : mValue.mImage->mURI;
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}
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const PRUnichar* GetOriginalURLValue() const
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{
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NS_ASSERTION(mUnit == eCSSUnit_URL || mUnit == eCSSUnit_Image,
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"not a URL value");
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return mUnit == eCSSUnit_URL ?
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mValue.mURL->mString : mValue.mImage->mString;
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}
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// Not making this inline because that would force us to include
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// imgIRequest.h, which leads to REQUIRES hell, since this header is included
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// all over.
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imgIRequest* GetImageValue() const;
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nscoord GetLengthTwips() const;
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void Reset() // sets to null
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{
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if ((eCSSUnit_String <= mUnit) && (mUnit <= eCSSUnit_Counters) &&
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(nsnull != mValue.mString)) {
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nsCRT::free(mValue.mString);
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} else if (eCSSUnit_URL == mUnit) {
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mValue.mURL->Release();
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} else if (eCSSUnit_Image == mUnit) {
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mValue.mImage->Release();
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}
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mUnit = eCSSUnit_Null;
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mValue.mInt = 0;
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}
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void SetIntValue(PRInt32 aValue, nsCSSUnit aUnit);
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void SetPercentValue(float aValue);
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void SetFloatValue(float aValue, nsCSSUnit aUnit);
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void SetStringValue(const nsAString& aValue, nsCSSUnit aUnit);
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void SetColorValue(nscolor aValue);
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void SetURLValue(nsCSSValue::URL* aURI);
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void SetImageValue(nsCSSValue::Image* aImage);
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void SetAutoValue();
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void SetInheritValue();
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void SetInitialValue();
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void SetNoneValue();
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void SetNormalValue();
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void StartImageLoad(nsIDocument* aDocument) const; // Not really const, but pretending
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#ifdef DEBUG
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void AppendToString(nsAString& aBuffer, nsCSSProperty aPropID = eCSSProperty_UNKNOWN) const;
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void ToString(nsAString& aBuffer, nsCSSProperty aPropID = eCSSProperty_UNKNOWN) const;
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#endif
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MOZ_DECL_CTOR_COUNTER(nsCSSValue::URL)
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struct URL {
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// Caller must delete this object immediately if the allocation of
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// |mString| fails.
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URL(nsIURI* aURI, const PRUnichar* aString)
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: mURI(aURI),
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mString(nsCRT::strdup(aString)),
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mRefCnt(0)
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{
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MOZ_COUNT_CTOR(nsCSSValue::URL);
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}
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~URL()
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{
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// null |mString| isn't valid normally, but is checked by callers
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// of the constructor
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if (mString)
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nsCRT::free(mString);
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MOZ_COUNT_DTOR(nsCSSValue::URL);
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}
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PRBool operator==(const URL& aOther)
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{
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PRBool eq;
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return nsCRT::strcmp(mString, aOther.mString) == 0 &&
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(mURI == aOther.mURI || // handles null == null
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(mURI && aOther.mURI &&
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NS_SUCCEEDED(mURI->Equals(aOther.mURI, &eq)) &&
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eq));
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}
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nsCOMPtr<nsIURI> mURI; // null == invalid URL
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PRUnichar* mString;
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void AddRef() { ++mRefCnt; }
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void Release() { if (--mRefCnt == 0) delete this; }
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protected:
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nsrefcnt mRefCnt;
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};
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MOZ_DECL_CTOR_COUNTER(nsCSSValue::Image)
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struct Image : public URL {
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// Not making the constructor and destructor inline because that would
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// force us to include imgIRequest.h, which leads to REQUIRES hell, since
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// this header is included all over.
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Image(nsIURI* aURI, const PRUnichar* aString, nsIDocument* aDocument);
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~Image();
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// Inherit operator== from nsCSSValue::URL
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nsCOMPtr<imgIRequest> mRequest; // null == image load blocked or somehow failed
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// Override AddRef/Release so we delete ourselves via the right pointer.
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void AddRef() { ++mRefCnt; }
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void Release() { if (--mRefCnt == 0) delete this; }
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};
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protected:
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nsCSSUnit 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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nscolor mColor;
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URL* mURL;
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Image* mImage;
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} mValue;
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};
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#endif /* nsCSSValue_h___ */
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