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0fd9123eac
This patch was generated by a script. Here's the source of the script for future reference: function convert() { echo "Converting $1 to $2..." find . ! -wholename "*nsprpub*" \ ! -wholename "*security/nss*" \ ! -wholename "*/.hg*" \ ! -wholename "obj-ff-dbg*" \ ! -name nsXPCOMCID.h \ ! -name prtypes.h \ -type f \ \( -iname "*.cpp" \ -o -iname "*.h" \ -o -iname "*.c" \ -o -iname "*.cc" \ -o -iname "*.idl" \ -o -iname "*.ipdl" \ -o -iname "*.ipdlh" \ -o -iname "*.mm" \) | \ xargs -n 1 sed -i -e "s/\b$1\b/$2/g" } convert PRInt8 int8_t convert PRUint8 uint8_t convert PRInt16 int16_t convert PRUint16 uint16_t convert PRInt32 int32_t convert PRUint32 uint32_t convert PRInt64 int64_t convert PRUint64 uint64_t convert PRIntn int convert PRUintn unsigned convert PRSize size_t convert PROffset32 int32_t convert PROffset64 int64_t convert PRPtrdiff ptrdiff_t convert PRFloat64 double
217 lines
6.7 KiB
C++
217 lines
6.7 KiB
C++
/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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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 NSFONTMETRICS__H__
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#define NSFONTMETRICS__H__
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#include "nsCOMPtr.h"
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#include "nsCoord.h"
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#include "nsFont.h"
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#include "gfxFont.h"
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class nsIAtom;
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class nsDeviceContext;
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class nsRenderingContext;
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struct nsBoundingMetrics;
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/**
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* Font metrics
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*
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* This class may be somewhat misnamed. A better name might be
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* nsFontList. The style system uses the nsFont struct for various
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* font properties, one of which is font-family, which can contain a
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* *list* of font names. The nsFont struct is "realized" by asking the
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* device context to cough up an nsFontMetrics object, which contains
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* a list of real font handles, one for each font mentioned in
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* font-family (and for each fallback when we fall off the end of that
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* list).
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*
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* The style system needs to have access to certain metrics, such as
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* the em height (for the CSS "em" unit), and we use the first Western
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* font's metrics for that purpose. The platform-specific
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* implementations are expected to select non-Western fonts that "fit"
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* reasonably well with the Western font that is loaded at Init time.
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*/
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class nsFontMetrics
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{
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public:
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nsFontMetrics();
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~nsFontMetrics();
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NS_INLINE_DECL_REFCOUNTING(nsFontMetrics)
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/**
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* Initialize the font metrics. Call this after creating the font metrics.
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* Font metrics you get from the font cache do NOT need to be initialized
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*
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* @see nsDeviceContext#GetMetricsFor()
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*/
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nsresult Init(const nsFont& aFont, nsIAtom* aLanguage,
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nsDeviceContext *aContext,
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gfxUserFontSet *aUserFontSet = nullptr);
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/**
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* Destroy this font metrics. This breaks the association between
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* the font metrics and the device context.
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*/
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void Destroy();
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/**
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* Return the font's x-height.
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*/
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nscoord XHeight();
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/**
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* Return the font's superscript offset (the distance from the
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* baseline to where a superscript's baseline should be placed).
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* The value returned will be positive.
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*/
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nscoord SuperscriptOffset();
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/**
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* Return the font's subscript offset (the distance from the
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* baseline to where a subscript's baseline should be placed).
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* The value returned will be positive.
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*/
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nscoord SubscriptOffset();
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/**
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* Return the font's strikeout offset (the distance from the
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* baseline to where a strikeout should be placed) and size.
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* Positive values are above the baseline, negative below.
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*/
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void GetStrikeout(nscoord& aOffset, nscoord& aSize);
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/**
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* Return the font's underline offset (the distance from the
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* baseline to where a underline should be placed) and size.
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* Positive values are above the baseline, negative below.
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*/
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void GetUnderline(nscoord& aOffset, nscoord& aSize);
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/**
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* Returns the amount of internal leading for the font.
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* This is normally the difference between the max ascent
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* and the em ascent.
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*/
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nscoord InternalLeading();
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/**
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* Returns the amount of external leading for the font.
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* em ascent(?) plus external leading is the font designer's
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* recommended line-height for this font.
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*/
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nscoord ExternalLeading();
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/**
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* Returns the height of the em square.
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* This is em ascent plus em descent.
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*/
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nscoord EmHeight();
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/**
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* Returns the ascent part of the em square.
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*/
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nscoord EmAscent();
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/**
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* Returns the descent part of the em square.
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*/
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nscoord EmDescent();
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/**
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* Returns the height of the bounding box.
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* This is max ascent plus max descent.
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*/
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nscoord MaxHeight();
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/**
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* Returns the maximum distance characters in this font extend
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* above the base line.
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*/
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nscoord MaxAscent();
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/**
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* Returns the maximum distance characters in this font extend
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* below the base line.
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*/
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nscoord MaxDescent();
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/**
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* Returns the maximum character advance for the font.
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*/
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nscoord MaxAdvance();
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/**
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* Returns the average character width
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*/
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nscoord AveCharWidth();
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/**
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* Returns the often needed width of the space character
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*/
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nscoord SpaceWidth();
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/**
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* Returns the font associated with these metrics. The return value
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* is only defined after Init() has been called.
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*/
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const nsFont &Font() { return mFont; }
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/**
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* Returns the language associated with these metrics
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*/
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nsIAtom* Language() { return mLanguage; }
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int32_t GetMaxStringLength();
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// Get the width for this string. aWidth will be updated with the
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// width in points, not twips. Callers must convert it if they
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// want it in another format.
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nscoord GetWidth(const char* aString, uint32_t aLength,
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nsRenderingContext *aContext);
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nscoord GetWidth(const PRUnichar* aString, uint32_t aLength,
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nsRenderingContext *aContext);
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// Draw a string using this font handle on the surface passed in.
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void DrawString(const char *aString, uint32_t aLength,
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nscoord aX, nscoord aY,
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nsRenderingContext *aContext);
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void DrawString(const PRUnichar* aString, uint32_t aLength,
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nscoord aX, nscoord aY,
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nsRenderingContext *aContext,
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nsRenderingContext *aTextRunConstructionContext);
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nsBoundingMetrics GetBoundingMetrics(const PRUnichar *aString,
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uint32_t aLength,
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nsRenderingContext *aContext);
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// Returns the LOOSE_INK_EXTENTS bounds of the text for determing the
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// overflow area of the string.
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nsBoundingMetrics GetInkBoundsForVisualOverflow(const PRUnichar *aString,
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uint32_t aLength,
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nsRenderingContext *aContext);
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void SetTextRunRTL(bool aIsRTL) { mTextRunRTL = aIsRTL; }
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bool GetTextRunRTL() { return mTextRunRTL; }
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gfxFontGroup* GetThebesFontGroup() { return mFontGroup; }
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gfxUserFontSet* GetUserFontSet() { return mFontGroup->GetUserFontSet(); }
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uint32_t AppUnitsPerDevPixel() { return mP2A; }
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protected:
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const gfxFont::Metrics& GetMetrics() const;
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nsFont mFont;
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nsRefPtr<gfxFontGroup> mFontGroup;
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nsCOMPtr<nsIAtom> mLanguage;
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nsDeviceContext *mDeviceContext;
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uint32_t mP2A;
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bool mTextRunRTL;
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};
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#endif /* NSFONTMETRICS__H__ */
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