1 : /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
2 : /* ***** BEGIN LICENSE BLOCK *****
3 : * Version: MPL 1.1/GPL 2.0/LGPL 2.1
4 : *
5 : * The contents of this file are subject to the Mozilla Public License Version
6 : * 1.1 (the "License"); you may not use this file except in compliance with
7 : * the License. You may obtain a copy of the License at
8 : * http://www.mozilla.org/MPL/
9 : *
10 : * Software distributed under the License is distributed on an "AS IS" basis,
11 : * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
12 : * for the specific language governing rights and limitations under the
13 : * License.
14 : *
15 : * The Original Code is mozilla.org code.
16 : *
17 : * The Initial Developer of the Original Code is
18 : * Netscape Communications Corporation.
19 : * Portions created by the Initial Developer are Copyright (C) 1998
20 : * the Initial Developer. All Rights Reserved.
21 : *
22 : * Contributor(s):
23 : *
24 : * Alternatively, the contents of this file may be used under the terms of
25 : * either of the GNU General Public License Version 2 or later (the "GPL"),
26 : * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
27 : * in which case the provisions of the GPL or the LGPL are applicable instead
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33 : * the provisions above, a recipient may use your version of this file under
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35 : *
36 : * ***** END LICENSE BLOCK ***** */
37 : #ifndef nsStyleUtil_h___
38 : #define nsStyleUtil_h___
39 :
40 : #include "nsCoord.h"
41 : #include "nsCSSProperty.h"
42 :
43 : class nsPresContext;
44 : struct nsStyleBackground;
45 : class nsString;
46 : class nsStringComparator;
47 : class nsIContent;
48 :
49 : enum nsFontSizeType {
50 : eFontSize_HTML = 1,
51 : eFontSize_CSS = 2
52 : };
53 :
54 :
55 : // Style utility functions
56 : class nsStyleUtil {
57 : public:
58 :
59 : static nscoord CalcFontPointSize(PRInt32 aHTMLSize, PRInt32 aBasePointSize,
60 : nsPresContext* aPresContext,
61 : nsFontSizeType aFontSizeType = eFontSize_HTML);
62 :
63 : static nscoord FindNextSmallerFontSize(nscoord aFontSize, PRInt32 aBasePointSize,
64 : nsPresContext* aPresContext,
65 : nsFontSizeType aFontSizeType = eFontSize_HTML);
66 :
67 : static nscoord FindNextLargerFontSize(nscoord aFontSize, PRInt32 aBasePointSize,
68 : nsPresContext* aPresContext,
69 : nsFontSizeType aFontSizeType = eFontSize_HTML);
70 :
71 : static PRInt32 ConstrainFontWeight(PRInt32 aWeight);
72 :
73 : static bool DashMatchCompare(const nsAString& aAttributeValue,
74 : const nsAString& aSelectorValue,
75 : const nsStringComparator& aComparator);
76 :
77 : // Append a quoted (with "") and escaped version of aString to aResult.
78 : static void AppendEscapedCSSString(const nsString& aString,
79 : nsAString& aResult);
80 : // Append the identifier given by |aIdent| to |aResult|, with
81 : // appropriate escaping so that it can be reparsed to the same
82 : // identifier.
83 : static void AppendEscapedCSSIdent(const nsString& aIdent,
84 : nsAString& aResult);
85 :
86 : // Append a bitmask-valued property's value(s) (space-separated) to aResult.
87 : static void AppendBitmaskCSSValue(nsCSSProperty aProperty,
88 : PRInt32 aMaskedValue,
89 : PRInt32 aFirstMask,
90 : PRInt32 aLastMask,
91 : nsAString& aResult);
92 :
93 : /*
94 : * Convert an author-provided floating point number to an integer (0
95 : * ... 255) appropriate for use in the alpha component of a color.
96 : */
97 0 : static PRUint8 FloatToColorComponent(float aAlpha)
98 : {
99 0 : NS_ASSERTION(0.0 <= aAlpha && aAlpha <= 1.0, "out of range");
100 0 : return NSToIntRound(aAlpha * 255);
101 : }
102 :
103 : /*
104 : * Convert the alpha component of an nscolor (0 ... 255) to the
105 : * floating point number with the least accurate *decimal*
106 : * representation that is converted to that color.
107 : *
108 : * Should be used only by serialization code.
109 : */
110 : static float ColorComponentToFloat(PRUint8 aAlpha);
111 :
112 : /*
113 : * Does this child count as significant for selector matching?
114 : */
115 : static bool IsSignificantChild(nsIContent* aChild,
116 : bool aTextIsSignificant,
117 : bool aWhitespaceIsSignificant);
118 : };
119 :
120 :
121 : #endif /* nsStyleUtil_h___ */
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