gecko/layout/generic/nsTextRunTransformations.h

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#ifndef NSTEXTRUNTRANSFORMATIONS_H_
#define NSTEXTRUNTRANSFORMATIONS_H_

#include "gfxFont.h"

class nsTransformedTextRun;
class nsStyleContext;

class nsTransformingTextRunFactory {
public:
  virtual ~nsTransformingTextRunFactory() {}

  // Default 8-bit path just transforms to Unicode and takes that path
  gfxTextRun* MakeTextRun(const PRUint8* aString, PRUint32 aLength,
                          const gfxFontGroup::Parameters* aParams,
                          gfxFontGroup* aFontGroup, PRUint32 aFlags,
                          nsStyleContext** aStyles, PRBool aOwnsFactory = PR_TRUE);
  gfxTextRun* MakeTextRun(const PRUnichar* aString, PRUint32 aLength,
                          const gfxFontGroup::Parameters* aParams,
                          gfxFontGroup* aFontGroup, PRUint32 aFlags,
                          nsStyleContext** aStyles, PRBool aOwnsFactory = PR_TRUE);

  virtual void RebuildTextRun(nsTransformedTextRun* aTextRun, gfxContext* aRefContext) = 0;
};

/**
 * Builds textruns that render their text using a font-variant (i.e.,
 * smallcaps).
 */
class nsFontVariantTextRunFactory : public nsTransformingTextRunFactory {
public:
  virtual void RebuildTextRun(nsTransformedTextRun* aTextRun, gfxContext* aRefContext);
};

/**
 * Builds textruns that transform the text in some way (e.g., capitalize)
 * and then render the text using some other textrun implementation.
 */
class nsCaseTransformTextRunFactory : public nsTransformingTextRunFactory {
public:
  // We could add an optimization here so that when there is no inner
  // factory, no title-case conversion, and no upper-casing of SZLIG, we override
  // MakeTextRun (after making it virtual in the superclass) and have it
  // just convert the string to uppercase or lowercase and create the textrun
  // via the fontgroup.
  
  // Takes ownership of aInnerTransformTextRunFactory
  nsCaseTransformTextRunFactory(nsTransformingTextRunFactory* aInnerTransformingTextRunFactory,
                                PRBool aAllUppercase = PR_FALSE)
    : mInnerTransformingTextRunFactory(aInnerTransformingTextRunFactory),
      mAllUppercase(aAllUppercase) {}

  virtual void RebuildTextRun(nsTransformedTextRun* aTextRun, gfxContext* aRefContext);

protected:
  nsAutoPtr<nsTransformingTextRunFactory> mInnerTransformingTextRunFactory;
  PRPackedBool                            mAllUppercase;
};

#endif /*NSTEXTRUNTRANSFORMATIONS_H_*/