зеркало из https://github.com/mozilla/gecko-dev.git
122 строки
4.7 KiB
C++
122 строки
4.7 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: MPL 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 Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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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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* Alternatively, the contents of this file may be used under the terms of
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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* or 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 MPL, 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 MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#ifndef nsStyleUtil_h___
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#define nsStyleUtil_h___
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#include "nsCoord.h"
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#include "nsCSSProperty.h"
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class nsPresContext;
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struct nsStyleBackground;
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class nsString;
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class nsStringComparator;
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class nsIContent;
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enum nsFontSizeType {
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eFontSize_HTML = 1,
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eFontSize_CSS = 2
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};
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// Style utility functions
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class nsStyleUtil {
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public:
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static nscoord CalcFontPointSize(PRInt32 aHTMLSize, PRInt32 aBasePointSize,
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nsPresContext* aPresContext,
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nsFontSizeType aFontSizeType = eFontSize_HTML);
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static nscoord FindNextSmallerFontSize(nscoord aFontSize, PRInt32 aBasePointSize,
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nsPresContext* aPresContext,
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nsFontSizeType aFontSizeType = eFontSize_HTML);
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static nscoord FindNextLargerFontSize(nscoord aFontSize, PRInt32 aBasePointSize,
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nsPresContext* aPresContext,
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nsFontSizeType aFontSizeType = eFontSize_HTML);
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static PRInt32 ConstrainFontWeight(PRInt32 aWeight);
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static bool DashMatchCompare(const nsAString& aAttributeValue,
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const nsAString& aSelectorValue,
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const nsStringComparator& aComparator);
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// Append a quoted (with "") and escaped version of aString to aResult.
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static void AppendEscapedCSSString(const nsString& aString,
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nsAString& aResult);
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// Append the identifier given by |aIdent| to |aResult|, with
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// appropriate escaping so that it can be reparsed to the same
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// identifier.
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static void AppendEscapedCSSIdent(const nsString& aIdent,
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nsAString& aResult);
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// Append a bitmask-valued property's value(s) (space-separated) to aResult.
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static void AppendBitmaskCSSValue(nsCSSProperty aProperty,
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PRInt32 aMaskedValue,
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PRInt32 aFirstMask,
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PRInt32 aLastMask,
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nsAString& aResult);
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/*
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* Convert an author-provided floating point number to an integer (0
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* ... 255) appropriate for use in the alpha component of a color.
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*/
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static PRUint8 FloatToColorComponent(float aAlpha)
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{
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NS_ASSERTION(0.0 <= aAlpha && aAlpha <= 1.0, "out of range");
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return NSToIntRound(aAlpha * 255);
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}
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/*
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* Convert the alpha component of an nscolor (0 ... 255) to the
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* floating point number with the least accurate *decimal*
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* representation that is converted to that color.
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*
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* Should be used only by serialization code.
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*/
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static float ColorComponentToFloat(PRUint8 aAlpha);
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/*
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* Does this child count as significant for selector matching?
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*/
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static bool IsSignificantChild(nsIContent* aChild,
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bool aTextIsSignificant,
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bool aWhitespaceIsSignificant);
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};
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#endif /* nsStyleUtil_h___ */
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