gecko/gfx/thebes/public/gfxAtsuiFonts.h

192 lines
7.2 KiB
C++

/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is thebes gfx code.
*
* The Initial Developer of the Original Code is Mozilla Corporation.
* Portions created by the Initial Developer are Copyright (C) 2006
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Vladimir Vukicevic <vladimir@pobox.com>
* Masayuki Nakano <masayuki@d-toybox.com>
* John Daggett <jdaggett@mozilla.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#ifndef GFX_ATSUIFONTS_H
#define GFX_ATSUIFONTS_H
#include "cairo.h"
#include "gfxTypes.h"
#include "gfxFont.h"
#include "gfxFontUtils.h"
#include "gfxPlatform.h"
#include <Carbon/Carbon.h>
class gfxAtsuiFontGroup;
class MacOSFontEntry;
class MacOSFamilyEntry;
class gfxAtsuiFont : public gfxFont {
public:
gfxAtsuiFont(MacOSFontEntry *aFontEntry,
const gfxFontStyle *fontStyle, PRBool aNeedsBold);
virtual ~gfxAtsuiFont();
virtual const gfxFont::Metrics& GetMetrics();
float GetCharWidth(PRUnichar c, PRUint32 *aGlyphID = nsnull);
float GetCharHeight(PRUnichar c);
ATSUFontID GetATSUFontID();
cairo_font_face_t *CairoFontFace() { return mFontFace; }
cairo_scaled_font_t *CairoScaledFont() { return mScaledFont; }
ATSUStyle GetATSUStyle() { return mATSUStyle; }
virtual nsString GetUniqueName();
virtual PRUint32 GetSpaceGlyph() { return mSpaceGlyph; }
PRBool HasMirroringInfo();
virtual void SetupGlyphExtents(gfxContext *aContext, PRUint32 aGlyphID,
PRBool aNeedTight, gfxGlyphExtents *aExtents);
PRBool TestCharacterMap(PRUint32 aCh);
MacOSFontEntry* GetFontEntry();
PRBool Valid() { return mIsValid; }
protected:
const gfxFontStyle *mFontStyle;
ATSUStyle mATSUStyle;
PRBool mHasMirroring;
PRBool mHasMirroringLookedUp;
nsString mUniqueName;
cairo_font_face_t *mFontFace;
cairo_scaled_font_t *mScaledFont;
gfxFont::Metrics mMetrics;
gfxFloat mAdjustedSize;
PRUint32 mSpaceGlyph;
void InitMetrics(ATSUFontID aFontID, ATSFontRef aFontRef);
virtual PRBool SetupCairoFont(gfxContext *aContext);
};
class THEBES_API gfxAtsuiFontGroup : public gfxFontGroup {
public:
gfxAtsuiFontGroup(const nsAString& families,
const gfxFontStyle *aStyle);
virtual ~gfxAtsuiFontGroup() {};
virtual gfxFontGroup *Copy(const gfxFontStyle *aStyle);
virtual gfxTextRun *MakeTextRun(const PRUnichar* aString, PRUint32 aLength,
const Parameters* aParams, PRUint32 aFlags);
virtual gfxTextRun *MakeTextRun(const PRUint8* aString, PRUint32 aLength,
const Parameters* aParams, PRUint32 aFlags);
// When aWrapped is true, the string includes bidi control
// characters. The first character will be LRO or LRO to force setting the
// direction for all characters, the last character is PDF, and the
// second to last character is a non-whitespace character --- to ensure
// that there is no "trailing whitespace" in the string, see
// http://weblogs.mozillazine.org/roc/archives/2007/02/superlaser_targ.html#comments
void MakeTextRunInternal(const PRUnichar *aString, PRUint32 aLength,
PRBool aWrapped, gfxTextRun *aTextRun);
gfxAtsuiFont* GetFontAt(PRInt32 aFontIndex) {
return static_cast<gfxAtsuiFont*>(static_cast<gfxFont*>(mFonts[aFontIndex]));
}
PRBool HasFont(ATSUFontID fid);
inline gfxAtsuiFont* WhichFontSupportsChar(nsTArray< nsRefPtr<gfxFont> >& aFontList, PRUint32 aCh) {
PRUint32 len = aFontList.Length();
for (PRUint32 i = 0; i < len; i++) {
gfxAtsuiFont* font = static_cast<gfxAtsuiFont*>(aFontList.ElementAt(i).get());
if (font->TestCharacterMap(aCh))
return font;
}
return nsnull;
}
// search through pref fonts for a character, return nsnull if no matching pref font
already_AddRefed<gfxFont> WhichPrefFontSupportsChar(PRUint32 aCh);
already_AddRefed<gfxFont> WhichSystemFontSupportsChar(PRUint32 aCh);
protected:
static PRBool FindATSUFont(const nsAString& aName,
const nsACString& aGenericName,
void *closure);
PRUint32 GuessMaximumStringLength();
/**
* @param aRun the text run to fill in
* @param aString the complete text including all wrapper characters
* @param aLength the length of aString
* @param aLayoutStart the first character of aString that should be
* at the start of the ATSUI layout; this skips any wrapper character
* used to override direction
* @param aLayoutLength the length of the characters that should be
* in the ATSUI layout; this excludes any trailing wrapper character
* used to override direction
* @param aTrailingCharsToIgnore the number of trailing characters
* in the ATSUI layout that are not part of the text run
* (characters added to ensure correct RTL and kerning behaviour)
* @param aTextRunOffset the character offset in the textrun where
* the glyph data from the ATSUI layout should be copied
* @return true for success
*/
PRBool InitTextRun(gfxTextRun *aRun,
const PRUnichar *aString, PRUint32 aLength,
PRUint32 aLayoutStart, PRUint32 aLayoutLength,
PRUint32 aOffsetInTextRun, PRUint32 aLengthInTextRun);
// cache the most recent pref font to avoid general pref font lookup
nsRefPtr<MacOSFamilyEntry> mLastPrefFamily;
nsRefPtr<gfxAtsuiFont> mLastPrefFont;
eFontPrefLang mLastPrefLang; // lang group for last pref font
PRBool mLastPrefFirstFont; // is this the first font in the list of pref fonts for this lang group?
eFontPrefLang mPageLang;
};
#endif /* GFX_ATSUIFONTS_H */