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131 lines
4.5 KiB
C
131 lines
4.5 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 nsFont_h___
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#define nsFont_h___
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#include "gfxCore.h"
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#include "nsCoord.h"
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#include "nsStringGlue.h"
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#include "gfxFontConstants.h"
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#include "gfxFontFeatures.h"
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// XXX we need a method to enumerate all of the possible fonts on the
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// system across family, weight, style, size, etc. But not here!
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// Enumerator callback function. Return false to stop
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typedef bool (*nsFontFamilyEnumFunc)(const nsString& aFamily, bool aGeneric, void *aData);
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// IDs for generic fonts
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// NOTE: 0, 1 are reserved for the special IDs of the default variable
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// and fixed fonts in the presentation context, see nsPresContext.h
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const PRUint8 kGenericFont_NONE = 0x00;
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// Special
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const PRUint8 kGenericFont_moz_variable = 0x00; // for the default variable width font
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const PRUint8 kGenericFont_moz_fixed = 0x01; // our special "use the user's fixed font"
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// CSS
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const PRUint8 kGenericFont_serif = 0x02;
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const PRUint8 kGenericFont_sans_serif = 0x04;
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const PRUint8 kGenericFont_monospace = 0x08;
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const PRUint8 kGenericFont_cursive = 0x10;
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const PRUint8 kGenericFont_fantasy = 0x20;
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struct gfxFontStyle;
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// Font structure.
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struct NS_GFX nsFont {
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// The family name of the font
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nsString name;
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// The style of font (normal, italic, oblique; see gfxFontConstants.h)
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PRUint8 style;
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// Force this font to not be considered a 'generic' font, even if
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// the name is the same as a CSS generic font family.
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PRUint8 systemFont;
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// The variant of the font (normal, small-caps)
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PRUint8 variant;
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// The decorations on the font (underline, overline,
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// line-through). The decorations can be binary or'd together.
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PRUint8 decorations;
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// The weight of the font; see gfxFontConstants.h.
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PRUint16 weight;
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// The stretch of the font (the sum of various NS_FONT_STRETCH_*
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// constants; see gfxFontConstants.h).
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PRInt16 stretch;
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// The logical size of the font, in nscoord units
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nscoord size;
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// The aspect-value (ie., the ratio actualsize:actualxheight) that any
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// actual physical font created from this font structure must have when
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// rendering or measuring a string. A value of 0 means no adjustment
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// needs to be done.
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float sizeAdjust;
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// Font features from CSS font-feature-settings
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nsTArray<gfxFontFeature> fontFeatureSettings;
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// Language system tag, to override document language;
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// this is an OpenType "language system" tag represented as a 32-bit integer
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// (see http://www.microsoft.com/typography/otspec/languagetags.htm).
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nsString languageOverride;
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// Initialize the font struct with an ASCII name
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nsFont(const char* aName, PRUint8 aStyle, PRUint8 aVariant,
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PRUint16 aWeight, PRInt16 aStretch, PRUint8 aDecoration,
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nscoord aSize, float aSizeAdjust=0.0f,
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const nsString* aLanguageOverride = nsnull);
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// Initialize the font struct with a (potentially) unicode name
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nsFont(const nsString& aName, PRUint8 aStyle, PRUint8 aVariant,
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PRUint16 aWeight, PRInt16 aStretch, PRUint8 aDecoration,
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nscoord aSize, float aSizeAdjust=0.0f,
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const nsString* aLanguageOverride = nsnull);
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// Make a copy of the given font
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nsFont(const nsFont& aFont);
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nsFont();
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~nsFont();
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bool operator==(const nsFont& aOther) const {
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return Equals(aOther);
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}
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bool Equals(const nsFont& aOther) const ;
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// Compare ignoring differences in 'variant' and 'decoration'
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bool BaseEquals(const nsFont& aOther) const;
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nsFont& operator=(const nsFont& aOther);
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// Add featureSettings into style
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void AddFontFeaturesToStyle(gfxFontStyle *aStyle) const;
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// Utility method to interpret name string
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// enumerates all families specified by this font only
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// returns true if completed, false if stopped
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// enclosing quotes will be removed, and whitespace compressed (as needed)
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bool EnumerateFamilies(nsFontFamilyEnumFunc aFunc, void* aData) const;
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void GetFirstFamily(nsString& aFamily) const;
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// Utility method to return the ID of a generic font
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static void GetGenericID(const nsString& aGeneric, PRUint8* aID);
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};
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#define NS_FONT_VARIANT_NORMAL 0
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#define NS_FONT_VARIANT_SMALL_CAPS 1
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#define NS_FONT_DECORATION_NONE 0x0
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#define NS_FONT_DECORATION_UNDERLINE 0x1
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#define NS_FONT_DECORATION_OVERLINE 0x2
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#define NS_FONT_DECORATION_LINE_THROUGH 0x4
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#endif /* nsFont_h___ */
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