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115 lines
4.3 KiB
C++
115 lines
4.3 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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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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#include "gfxFontFeatures.h"
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#include "nsIPrincipal.h"
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#include "nsSubstring.h"
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class nsCSSValue;
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class nsStringComparator;
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class nsIContent;
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struct gfxFontFeature;
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class nsCSSValueList;
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template <class E> class nsTArray;
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// Style utility functions
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class nsStyleUtil {
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public:
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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 'quoteChar') and escaped version of aString
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// to aResult. 'quoteChar' must be ' or ".
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static void AppendEscapedCSSString(const nsAString& aString,
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nsAString& aResult,
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PRUnichar quoteChar = '"');
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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 nsAString& 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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int32_t aMaskedValue,
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int32_t aFirstMask,
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int32_t aLastMask,
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nsAString& aResult);
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static void AppendPaintOrderValue(uint8_t aValue, nsAString& aResult);
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static void AppendFontFeatureSettings(const nsTArray<gfxFontFeature>& aFeatures,
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nsAString& aResult);
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static void AppendFontFeatureSettings(const nsCSSValue& src,
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nsAString& aResult);
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// convert bitmask value to keyword name for a functional alternate
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static void GetFunctionalAlternatesName(int32_t aFeature,
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nsAString& aFeatureName);
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// Append functional font-variant-alternates values to string
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static void
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SerializeFunctionalAlternates(const nsTArray<gfxAlternateValue>& aAlternates,
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nsAString& aResult);
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// List of functional font-variant-alternates values to feature/value pairs
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static void
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ComputeFunctionalAlternates(const nsCSSValueList* aList,
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nsTArray<gfxAlternateValue>& aAlternateValues);
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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 uint8_t 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(uint8_t 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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* Does this principal have a CSP that blocks the application of
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* inline styles ? Returns false if application of the style should
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* be blocked.
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*
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* Note that the principal passed in here needs to be the principal
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* of the document, not of the style sheet. The document's principal
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* is where any Content Security Policy that should be used to
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* block or allow inline styles will be located.
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*/
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static bool CSPAllowsInlineStyle(nsIPrincipal* aPrincipal,
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nsIURI* aSourceURI,
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uint32_t aLineNumber,
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const nsSubstring& aStyleText,
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nsresult* aRv);
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};
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#endif /* nsStyleUtil_h___ */
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