pjs/layout/style/nsCSSProps.h

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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 * The Original Code is mozilla.org code.
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 * The Initial Developer of the Original Code is
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 * Contributor(s):
 *   Mats Palmgren <mats.palmgren@bredband.net>
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/*
 * methods for dealing with CSS properties and tables of the keyword
 * values they accept
 */

#ifndef nsCSSProps_h___
#define nsCSSProps_h___

#include "nsString.h"
#include "nsChangeHint.h"
#include "nsCSSProperty.h"
#include "nsStyleStruct.h"
#include "nsCSSKeywords.h"

// Flags for the kFlagsTable bitfield (flags_ in nsCSSPropList.h)

// A property that is a *-ltr-source or *-rtl-source property for one of
// the directional pseudo-shorthand properties.
#define CSS_PROPERTY_DIRECTIONAL_SOURCE           (1<<0)
#define CSS_PROPERTY_VALUE_LIST_USES_COMMAS       (1<<1) /* otherwise spaces */
#define CSS_PROPERTY_APPLIES_TO_FIRST_LETTER      (1<<2)
#define CSS_PROPERTY_APPLIES_TO_FIRST_LINE        (1<<3)
#define CSS_PROPERTY_APPLIES_TO_FIRST_LETTER_AND_FIRST_LINE \
  (CSS_PROPERTY_APPLIES_TO_FIRST_LETTER | CSS_PROPERTY_APPLIES_TO_FIRST_LINE)

class nsCSSProps {
public:
  static void AddRefTable(void);
  static void ReleaseTable(void);

  // Given a property string, return the enum value
  static nsCSSProperty LookupProperty(const nsAString& aProperty);
  static nsCSSProperty LookupProperty(const nsACString& aProperty);

  static inline PRBool IsShorthand(nsCSSProperty aProperty) {
    NS_ASSERTION(0 <= aProperty && aProperty < eCSSProperty_COUNT,
                 "out of range");
    return (aProperty >= eCSSProperty_COUNT_no_shorthands);
  }

  // Same but for @font-face descriptors
  static nsCSSFontDesc LookupFontDesc(const nsAString& aProperty);
  static nsCSSFontDesc LookupFontDesc(const nsACString& aProperty);

  // Given a property enum, get the string value
  static const nsAFlatCString& GetStringValue(nsCSSProperty aProperty);
  static const nsAFlatCString& GetStringValue(nsCSSFontDesc aFontDesc);

  // Given a CSS Property and a Property Enum Value
  // Return back a const nsString& representation of the 
  // value. Return back nullstr if no value is found
  static const nsAFlatCString& LookupPropertyValue(nsCSSProperty aProperty, PRInt32 aValue);

  // Get a color name for a predefined color value like buttonhighlight or activeborder
  // Sets the aStr param to the name of the propertyID
  static PRBool GetColorName(PRInt32 aPropID, nsCString &aStr);

  // Find |aKeyword| in |aTable|, if found set |aValue| to its corresponding value.
  // If not found, return PR_FALSE and do not set |aValue|.
  static PRBool FindKeyword(nsCSSKeyword aKeyword, const PRInt32 aTable[], PRInt32& aValue);
  // Return the first keyword in |aTable| that has the corresponding value |aValue|.
  // Return |eCSSKeyword_UNKNOWN| if not found.
  static nsCSSKeyword ValueToKeywordEnum(PRInt32 aValue, const PRInt32 aTable[]);
  // Ditto but as a string, return "" when not found.
  static const nsAFlatCString& ValueToKeyword(PRInt32 aValue, const PRInt32 aTable[]);

  static const nsCSSType       kTypeTable[eCSSProperty_COUNT_no_shorthands];
  static const nsStyleStructID kSIDTable[eCSSProperty_COUNT_no_shorthands];
  static const PRInt32* const  kKeywordTableTable[eCSSProperty_COUNT_no_shorthands];

private:
  static const PRUint32        kFlagsTable[eCSSProperty_COUNT];

public:
  static inline PRBool PropHasFlags(nsCSSProperty aProperty, PRUint32 aFlags)
  {
    NS_ASSERTION(0 <= aProperty && aProperty < eCSSProperty_COUNT,
                 "out of range");
    return (nsCSSProps::kFlagsTable[aProperty] & aFlags) == aFlags;
  }

private:
  // A table for shorthand properties.  The appropriate index is the
  // property ID minus eCSSProperty_COUNT_no_shorthands.
  static const nsCSSProperty *const
    kSubpropertyTable[eCSSProperty_COUNT - eCSSProperty_COUNT_no_shorthands];

public:
  static inline
  const nsCSSProperty * SubpropertyEntryFor(nsCSSProperty aProperty) {
    NS_ASSERTION(eCSSProperty_COUNT_no_shorthands <= aProperty &&
                 aProperty < eCSSProperty_COUNT,
                 "out of range");
    return nsCSSProps::kSubpropertyTable[aProperty -
                                         eCSSProperty_COUNT_no_shorthands];
  }

  // Returns an eCSSProperty_UNKNOWN-terminated array of the shorthand
  // properties containing |aProperty|, sorted from those that contain
  // the most properties to those that contain the least.
  static const nsCSSProperty * ShorthandsContaining(nsCSSProperty aProperty) {
    NS_ASSERTION(gShorthandsContainingPool, "uninitialized");
    NS_ASSERTION(0 <= aProperty && aProperty < eCSSProperty_COUNT_no_shorthands,
                 "out of range");
    return gShorthandsContainingTable[aProperty];
  }
private:
  // gShorthandsContainingTable is an array of the return values for
  // ShorthandsContaining (arrays of nsCSSProperty terminated by
  // eCSSProperty_UNKNOWN) pointing into memory in
  // gShorthandsContainingPool (which contains all of those arrays in a
  // single allocation, and is the one pointer that should be |free|d).
  static nsCSSProperty *gShorthandsContainingTable[eCSSProperty_COUNT_no_shorthands];
  static nsCSSProperty* gShorthandsContainingPool;
  static PRBool BuildShorthandsContainingTable();

public:

#define CSSPROPS_FOR_SHORTHAND_SUBPROPERTIES(iter_, prop_)                    \
  for (const nsCSSProperty* iter_ = nsCSSProps::SubpropertyEntryFor(prop_);   \
       *iter_ != eCSSProperty_UNKNOWN; ++iter_)

  // Keyword/Enum value tables
  static const PRInt32 kAppearanceKTable[];
  static const PRInt32 kAzimuthKTable[];
  static const PRInt32 kBackgroundAttachmentKTable[];
  static const PRInt32 kBackgroundClipKTable[];
  static const PRInt32 kBackgroundInlinePolicyKTable[];
  static const PRInt32 kBackgroundOriginKTable[];
  static const PRInt32 kBackgroundPositionKTable[];
  static const PRInt32 kBackgroundRepeatKTable[];
  static const PRInt32 kBorderCollapseKTable[];
  static const PRInt32 kBorderColorKTable[];
  static const PRInt32 kBorderImageKTable[];
  static const PRInt32 kBorderStyleKTable[];
  static const PRInt32 kBorderWidthKTable[];
  static const PRInt32 kBoxAlignKTable[];
  static const PRInt32 kBoxDirectionKTable[];
  static const PRInt32 kBoxOrientKTable[];
  static const PRInt32 kBoxPackKTable[];
#ifdef MOZ_SVG
  static const PRInt32 kDominantBaselineKTable[];
  static const PRInt32 kFillRuleKTable[];
  static const PRInt32 kImageRenderingKTable[];
  static const PRInt32 kPointerEventsKTable[];
  static const PRInt32 kShapeRenderingKTable[];
  static const PRInt32 kStrokeLinecapKTable[];
  static const PRInt32 kStrokeLinejoinKTable[];
  static const PRInt32 kTextAnchorKTable[];
  static const PRInt32 kTextRenderingKTable[];
  static const PRInt32 kColorInterpolationKTable[];
#endif
  static const PRInt32 kBoxPropSourceKTable[];
  static const PRInt32 kBoxShadowTypeKTable[];
  static const PRInt32 kBoxSizingKTable[];
  static const PRInt32 kCaptionSideKTable[];
  static const PRInt32 kClearKTable[];
  static const PRInt32 kColorKTable[];
  static const PRInt32 kContentKTable[];
  static const PRInt32 kCursorKTable[];
  static const PRInt32 kDirectionKTable[];
  static const PRInt32 kDisplayKTable[];
  static const PRInt32 kElevationKTable[];
  static const PRInt32 kEmptyCellsKTable[];
  static const PRInt32 kFloatKTable[];
  static const PRInt32 kFloatEdgeKTable[];
  static const PRInt32 kFontKTable[];
  static const PRInt32 kFontSizeKTable[];
  static const PRInt32 kFontStretchKTable[];
  static const PRInt32 kFontStyleKTable[];
  static const PRInt32 kFontVariantKTable[];
  static const PRInt32 kFontWeightKTable[];
  static const PRInt32 kKeyEquivalentKTable[];
  static const PRInt32 kIMEModeKTable[];
  static const PRInt32 kListStylePositionKTable[];
  static const PRInt32 kListStyleKTable[];
  static const PRInt32 kOutlineStyleKTable[];
  static const PRInt32 kOutlineColorKTable[];
  static const PRInt32 kOverflowKTable[];
  static const PRInt32 kOverflowSubKTable[];
  static const PRInt32 kPageBreakKTable[];
  static const PRInt32 kPageBreakInsideKTable[];
  static const PRInt32 kPageMarksKTable[];
  static const PRInt32 kPageSizeKTable[];
  static const PRInt32 kPitchKTable[];
  static const PRInt32 kPositionKTable[];
  static const PRInt32 kSpeakKTable[];
  static const PRInt32 kSpeakHeaderKTable[];
  static const PRInt32 kSpeakNumeralKTable[];
  static const PRInt32 kSpeakPunctuationKTable[];
  static const PRInt32 kSpeechRateKTable[];
  static const PRInt32 kStackSizingKTable[];
  static const PRInt32 kTableLayoutKTable[];
  static const PRInt32 kTextAlignKTable[];
  static const PRInt32 kTextDecorationKTable[];
  static const PRInt32 kTextTransformKTable[];
  static const PRInt32 kUnicodeBidiKTable[];
  static const PRInt32 kUserFocusKTable[];
  static const PRInt32 kUserInputKTable[];
  static const PRInt32 kUserModifyKTable[];
  static const PRInt32 kUserSelectKTable[];
  static const PRInt32 kVerticalAlignKTable[];
  static const PRInt32 kVisibilityKTable[];
  static const PRInt32 kVolumeKTable[];
  static const PRInt32 kWhitespaceKTable[];
  static const PRInt32 kWidthKTable[]; // also min-width, max-width
  static const PRInt32 kWindowShadowKTable[];
  static const PRInt32 kWordwrapKTable[];
};

#endif /* nsCSSProps_h___ */