gecko/gfx/public/nsFont.h

151 lines
5.6 KiB
C

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** 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 mozilla.org code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either of 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
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* ***** END LICENSE BLOCK ***** */
#ifndef nsFont_h___
#define nsFont_h___
#include "gfxCore.h"
#include "nsCoord.h"
#include "nsStringGlue.h"
#include "gfxFontConstants.h"
// XXX we need a method to enumerate all of the possible fonts on the
// system across family, weight, style, size, etc. But not here!
// Enumerator callback function. Return PR_FALSE to stop
typedef PRBool (*nsFontFamilyEnumFunc)(const nsString& aFamily, PRBool aGeneric, void *aData);
// IDs for generic fonts
// NOTE: 0, 1 are reserved for the special IDs of the default variable
// and fixed fonts in the presentation context, see nsPresContext.h
const PRUint8 kGenericFont_NONE = 0x00;
// Special
const PRUint8 kGenericFont_moz_variable = 0x00; // for the default variable width font
const PRUint8 kGenericFont_moz_fixed = 0x01; // our special "use the user's fixed font"
// CSS
const PRUint8 kGenericFont_serif = 0x02;
const PRUint8 kGenericFont_sans_serif = 0x04;
const PRUint8 kGenericFont_monospace = 0x08;
const PRUint8 kGenericFont_cursive = 0x10;
const PRUint8 kGenericFont_fantasy = 0x20;
// Font structure.
struct NS_GFX nsFont {
// The family name of the font
nsString name;
// The style of font (normal, italic, oblique; see gfxFontConstants.h)
PRUint8 style;
// Force this font to not be considered a 'generic' font, even if
// the name is the same as a CSS generic font family.
PRUint8 systemFont;
// The variant of the font (normal, small-caps)
PRUint8 variant;
// True if the character set quirks (for treatment of "Symbol",
// "Wingdings", etc.) should be applied.
PRUint8 familyNameQuirks;
// The weight of the font; see gfxFontConstants.h.
PRUint16 weight;
// The stretch of the font (the sum of various NS_FONT_STRETCH_*
// constants; see gfxFontConstants.h).
PRInt16 stretch;
// The decorations on the font (underline, overline,
// line-through). The decorations can be binary or'd together.
PRUint8 decorations;
// The logical size of the font, in nscoord units
nscoord size;
// The aspect-value (ie., the ratio actualsize:actualxheight) that any
// actual physical font created from this font structure must have when
// rendering or measuring a string. A value of 0 means no adjustment
// needs to be done.
float sizeAdjust;
// Initialize the font struct with an ASCII name
nsFont(const char* aName, PRUint8 aStyle, PRUint8 aVariant,
PRUint16 aWeight, PRInt16 aStretch, PRUint8 aDecoration,
nscoord aSize, float aSizeAdjust=0.0f);
// Initialize the font struct with a (potentially) unicode name
nsFont(const nsString& aName, PRUint8 aStyle, PRUint8 aVariant,
PRUint16 aWeight, PRInt16 aStretch, PRUint8 aDecoration,
nscoord aSize, float aSizeAdjust=0.0f);
// Make a copy of the given font
nsFont(const nsFont& aFont);
nsFont();
~nsFont();
PRBool operator==(const nsFont& aOther) const {
return Equals(aOther);
}
PRBool Equals(const nsFont& aOther) const ;
// Compare ignoring differences in 'variant' and 'decoration'
PRBool BaseEquals(const nsFont& aOther) const;
nsFont& operator=(const nsFont& aOther);
// Utility method to interpret name string
// enumerates all families specified by this font only
// returns PR_TRUE if completed, PR_FALSE if stopped
// enclosing quotes will be removed, and whitespace compressed (as needed)
PRBool EnumerateFamilies(nsFontFamilyEnumFunc aFunc, void* aData) const;
void GetFirstFamily(nsString& aFamily) const;
// Utility method to return the ID of a generic font
static void GetGenericID(const nsString& aGeneric, PRUint8* aID);
};
#define NS_FONT_VARIANT_NORMAL 0
#define NS_FONT_VARIANT_SMALL_CAPS 1
#define NS_FONT_DECORATION_NONE 0x0
#define NS_FONT_DECORATION_UNDERLINE 0x1
#define NS_FONT_DECORATION_OVERLINE 0x2
#define NS_FONT_DECORATION_LINE_THROUGH 0x4
#endif /* nsFont_h___ */