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Bug 407059 - Part 2: Make nsMathMLChar use the MATH table. r=karlt
This commit is contained in:
Frédéric Wang
parent
d33eebd920
commit
4b93f4c2f2
@ -28,10 +28,15 @@
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#include "nsMathMLOperators.h"
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#include <algorithm>
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#include "gfxMathTable.h"
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using namespace mozilla;
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//#define NOISY_SEARCH 1
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static const float kLargeOpFactor = float(M_SQRT2);
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static const float kIntegralFactor = 2.0;
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// -----------------------------------------------------------------------------
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static const nsGlyphCode kNullGlyph = {{{0, 0}}, 0};
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typedef enum {eExtension_base, eExtension_variants, eExtension_parts}
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@ -41,16 +46,59 @@ typedef enum {eExtension_base, eExtension_variants, eExtension_parts}
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// nsGlyphTable is a class that provides an interface for accessing glyphs
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// of stretchy chars. It acts like a table that stores the variants of bigger
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// sizes (if any) and the partial glyphs needed to build extensible symbols.
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// An instance of nsGlyphTable is associated to one primary font. Extra glyphs
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// can be taken in other additional fonts when stretching certain characters.
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// These supplementary fonts are referred to as "external" fonts to the table.
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//
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// Bigger sizes (if any) of the char can then be retrieved with
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// BigOf(aSize). Partial glyphs can be retrieved with ElementAt()
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// Bigger sizes (if any) of the char can then be retrieved with BigOf(...).
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// Partial glyphs can be retrieved with ElementAt(...).
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//
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// A table consists of "nsGlyphCode"s which are viewed either as Unicode
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// points or as direct glyph indices, depending on the type of the table.
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// XXX The latter is not yet supported.
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// points (for nsPropertiesTable) or as direct glyph indices (for
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// nsOpenTypeTable)
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// -----------------------------------------------------------------------------
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class nsGlyphTable {
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public:
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virtual ~nsGlyphTable() {}
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virtual const nsAString&
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FontNameFor(const nsGlyphCode& aGlyphCode) const = 0;
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// Getters for the parts
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virtual nsGlyphCode ElementAt(gfxContext* aThebesContext,
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int32_t aAppUnitsPerDevPixel,
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gfxFontGroup* aFontGroup,
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char16_t aChar,
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bool aVertical,
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uint32_t aPosition) = 0;
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virtual nsGlyphCode BigOf(gfxContext* aThebesContext,
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int32_t aAppUnitsPerDevPixel,
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gfxFontGroup* aFontGroup,
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char16_t aChar,
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bool aVertical,
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uint32_t aSize) = 0;
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// True if this table contains parts to render this char
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virtual bool HasPartsOf(gfxContext* aThebesContext,
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int32_t aAppUnitsPerDevPixel,
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gfxFontGroup* aFontGroup,
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char16_t aChar,
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bool aVertical) = 0;
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virtual gfxTextRun* MakeTextRun(gfxContext* aThebesContext,
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int32_t aAppUnitsPerDevPixel,
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gfxFontGroup* aFontGroup,
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const nsGlyphCode& aGlyph) = 0;
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protected:
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nsGlyphTable() : mCharCache(0) {}
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// For speedy re-use, we always cache the last data used in the table.
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// mCharCache is the Unicode point of the last char that was queried in this
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// table.
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char16_t mCharCache;
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};
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// An instance of nsPropertiesTable is associated with one primary font. Extra
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// glyphs can be taken in other additional fonts when stretching certain
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// characters.
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// These supplementary fonts are referred to as "external" fonts to the table.
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// General format of MathFont Property Files from which glyph data are
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// retrieved:
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@ -67,9 +115,6 @@ typedef enum {eExtension_base, eExtension_variants, eExtension_parts}
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// with the UNICODE REPLACEMENT CHARACTER 0xFFFD.
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// -----------------------------------------------------------------------------
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#define NS_TABLE_TYPE_UNICODE 0
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#define NS_TABLE_TYPE_GLYPH_INDEX 1
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#define NS_TABLE_STATE_ERROR -1
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#define NS_TABLE_STATE_EMPTY 0
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#define NS_TABLE_STATE_READY 1
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@ -98,23 +143,19 @@ LoadProperties(const nsString& aName,
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NS_ConvertUTF16toUTF8(uriStr));
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}
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// -----------------------------------------------------------------------------
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class nsGlyphTable {
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class nsPropertiesTable MOZ_FINAL : public nsGlyphTable {
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public:
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explicit nsGlyphTable(const nsString& aPrimaryFontName)
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: mFontName(1), // ensure space for primary font name.
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mState(NS_TABLE_STATE_EMPTY),
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mCharCache(0)
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explicit nsPropertiesTable(const nsString& aPrimaryFontName)
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: mFontName(1) // ensure space for primary font name.
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, mState(NS_TABLE_STATE_EMPTY)
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{
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MOZ_COUNT_CTOR(nsGlyphTable);
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MOZ_COUNT_CTOR(nsPropertiesTable);
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mFontName.AppendElement(aPrimaryFontName);
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}
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// not a virtual destructor: this class is not intended to be subclassed
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~nsGlyphTable()
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~nsPropertiesTable()
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{
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MOZ_COUNT_DTOR(nsGlyphTable);
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MOZ_COUNT_DTOR(nsPropertiesTable);
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}
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const nsAString& PrimaryFontName() const
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@ -122,29 +163,52 @@ public:
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return mFontName[0];
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}
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const nsAString& FontNameFor(const nsGlyphCode& aGlyphCode) const
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const nsAString&
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FontNameFor(const nsGlyphCode& aGlyphCode) const MOZ_OVERRIDE
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{
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NS_ASSERTION(!aGlyphCode.IsGlyphID(),
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"nsGlyphTable can only access glyphs by Unicode code point");
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"nsPropertiesTable can only access glyphs by code point");
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return mFontName[aGlyphCode.font];
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}
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// Getters for the parts
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nsGlyphCode ElementAt(char16_t aChar, uint32_t aPosition);
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nsGlyphCode BigOf(char16_t aChar, int32_t aSize) {
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return ElementAt(aChar, 4 + aSize);
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virtual nsGlyphCode ElementAt(gfxContext* aThebesContext,
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int32_t aAppUnitsPerDevPixel,
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gfxFontGroup* aFontGroup,
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char16_t aChar,
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bool aVertical,
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uint32_t aPosition) MOZ_OVERRIDE;
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virtual nsGlyphCode BigOf(gfxContext* aThebesContext,
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int32_t aAppUnitsPerDevPixel,
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gfxFontGroup* aFontGroup,
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char16_t aChar,
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bool aVertical,
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uint32_t aSize) MOZ_OVERRIDE
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{
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return ElementAt(aThebesContext, aAppUnitsPerDevPixel, aFontGroup,
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aChar, aVertical, 4 + aSize);
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}
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// True if this table contains parts to render this char
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bool HasPartsOf(char16_t aChar) {
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return (ElementAt(aChar, 0).Exists() || ElementAt(aChar, 1).Exists() ||
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ElementAt(aChar, 2).Exists() || ElementAt(aChar, 3).Exists());
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virtual bool HasPartsOf(gfxContext* aThebesContext,
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int32_t aAppUnitsPerDevPixel,
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gfxFontGroup* aFontGroup,
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char16_t aChar,
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bool aVertical) MOZ_OVERRIDE
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{
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return (ElementAt(aThebesContext, aAppUnitsPerDevPixel, aFontGroup,
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aChar, aVertical, 0).Exists() ||
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ElementAt(aThebesContext, aAppUnitsPerDevPixel, aFontGroup,
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aChar, aVertical, 1).Exists() ||
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ElementAt(aThebesContext, aAppUnitsPerDevPixel, aFontGroup,
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aChar, aVertical, 2).Exists() ||
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ElementAt(aThebesContext, aAppUnitsPerDevPixel, aFontGroup,
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aChar, aVertical, 3).Exists());
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}
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gfxTextRun* MakeTextRun(gfxContext* aThebesContext,
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int32_t aAppUnitsPerDevPixel,
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gfxFontGroup* aFontGroup,
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const nsGlyphCode& aGlyph);
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virtual gfxTextRun* MakeTextRun(gfxContext* aThebesContext,
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int32_t aAppUnitsPerDevPixel,
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gfxFontGroup* aFontGroup,
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const nsGlyphCode& aGlyph) MOZ_OVERRIDE;
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private:
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// mFontName[0] is the primary font associated to this table. The others
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@ -159,10 +223,9 @@ private:
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// File
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nsCOMPtr<nsIPersistentProperties> mGlyphProperties;
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// For speedy re-use, we always cache the last data used in the table.
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// mCharCache is the Unicode point of the last char that was queried in this
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// table. mGlyphCache is a buffer containing the glyph data associated to
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// that char. For a property line 'key = value' in the MathFont Property File,
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// mGlyphCache is a buffer containing the glyph data associated with
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// mCharCache.
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// For a property line 'key = value' in the MathFont Property File,
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// mCharCache will retain the 'key' -- which is a Unicode point, while
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// mGlyphCache will retain the 'value', which is a consecutive list of
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// nsGlyphCodes, i.e., the pairs of 'code@font' needed by the char -- in
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@ -178,11 +241,16 @@ private:
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// table. Other digits map to the "external" fonts that may have been
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// specified in the MathFont Property File.
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nsString mGlyphCache;
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char16_t mCharCache;
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};
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/* virtual */
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nsGlyphCode
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nsGlyphTable::ElementAt(char16_t aChar, uint32_t aPosition)
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nsPropertiesTable::ElementAt(gfxContext* /* aThebesContext */,
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int32_t /* aAppUnitsPerDevPixel */,
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gfxFontGroup* /* aFontGroup */,
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char16_t aChar,
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bool /* aVertical */,
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uint32_t aPosition)
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{
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if (mState == NS_TABLE_STATE_ERROR) return kNullGlyph;
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// Load glyph properties if this is the first time we have been here
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@ -286,18 +354,205 @@ nsGlyphTable::ElementAt(char16_t aChar, uint32_t aPosition)
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return ch.code[0] == char16_t(0xFFFD) ? kNullGlyph : ch;
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}
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/* virtual */
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gfxTextRun*
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nsGlyphTable::MakeTextRun(gfxContext* aThebesContext,
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int32_t aAppUnitsPerDevPixel,
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gfxFontGroup* aFontGroup,
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const nsGlyphCode& aGlyph)
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nsPropertiesTable::MakeTextRun(gfxContext* aThebesContext,
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int32_t aAppUnitsPerDevPixel,
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gfxFontGroup* aFontGroup,
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const nsGlyphCode& aGlyph)
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{
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NS_ASSERTION(!aGlyph.IsGlyphID(), "not yet implemented");
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NS_ASSERTION(!aGlyph.IsGlyphID(),
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"nsPropertiesTable can only access glyphs by code point");
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return aFontGroup->
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MakeTextRun(aGlyph.code, aGlyph.Length(), aThebesContext,
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aAppUnitsPerDevPixel, 0);
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}
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// An instance of nsOpenTypeTable is associated with one gfxFontEntry that
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// corresponds to an Open Type font with a MATH table. All the glyphs come from
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// the same font and the calls to access size variants and parts are directly
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// forwarded to the gfx code.
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class nsOpenTypeTable MOZ_FINAL : public nsGlyphTable {
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public:
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~nsOpenTypeTable()
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{
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MOZ_COUNT_DTOR(nsOpenTypeTable);
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}
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virtual nsGlyphCode ElementAt(gfxContext* aThebesContext,
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int32_t aAppUnitsPerDevPixel,
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gfxFontGroup* aFontGroup,
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char16_t aChar,
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bool aVertical,
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uint32_t aPosition) MOZ_OVERRIDE;
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virtual nsGlyphCode BigOf(gfxContext* aThebesContext,
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int32_t aAppUnitsPerDevPixel,
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gfxFontGroup* aFontGroup,
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char16_t aChar,
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bool aVertical,
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uint32_t aSize) MOZ_OVERRIDE;
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virtual bool HasPartsOf(gfxContext* aThebesContext,
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int32_t aAppUnitsPerDevPixel,
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gfxFontGroup* aFontGroup,
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char16_t aChar,
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bool aVertical) MOZ_OVERRIDE;
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const nsAString&
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FontNameFor(const nsGlyphCode& aGlyphCode) const MOZ_OVERRIDE {
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NS_ASSERTION(aGlyphCode.IsGlyphID(),
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"nsOpenTypeTable can only access glyphs by id");
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return mFontEntry->FamilyName();
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}
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virtual gfxTextRun* MakeTextRun(gfxContext* aThebesContext,
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int32_t aAppUnitsPerDevPixel,
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gfxFontGroup* aFontGroup,
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const nsGlyphCode& aGlyph) MOZ_OVERRIDE;
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// This returns a new OpenTypeTable instance to give access to OpenType MATH
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// table or nullptr if the font does not have such table. Ownership is passed
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// to the caller.
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static nsOpenTypeTable* Create(gfxFont* aFont)
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{
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if (!aFont->GetFontEntry()->TryGetMathTable(aFont)) {
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return nullptr;
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}
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return new nsOpenTypeTable(aFont->GetFontEntry());
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}
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private:
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nsRefPtr<gfxFontEntry> mFontEntry;
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uint32_t mGlyphID;
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explicit nsOpenTypeTable(gfxFontEntry* aFontEntry)
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: mFontEntry(aFontEntry) {
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MOZ_COUNT_CTOR(nsOpenTypeTable);
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}
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void UpdateCache(gfxContext* aThebesContext,
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int32_t aAppUnitsPerDevPixel,
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gfxFontGroup* aFontGroup,
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char16_t aChar);
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};
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void
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nsOpenTypeTable::UpdateCache(gfxContext* aThebesContext,
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int32_t aAppUnitsPerDevPixel,
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gfxFontGroup* aFontGroup,
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char16_t aChar)
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{
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if (mCharCache != aChar) {
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nsAutoPtr<gfxTextRun> textRun;
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textRun = aFontGroup->
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MakeTextRun(&aChar, 1, aThebesContext, aAppUnitsPerDevPixel, 0);
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const gfxTextRun::CompressedGlyph& data = textRun->GetCharacterGlyphs()[0];
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if (data.IsSimpleGlyph()) {
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mGlyphID = data.GetSimpleGlyph();
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} else if (data.GetGlyphCount() == 1) {
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mGlyphID = textRun->GetDetailedGlyphs(0)->mGlyphID;
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} else {
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mGlyphID = 0;
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}
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mCharCache = aChar;
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}
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}
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/* virtual */
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nsGlyphCode
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nsOpenTypeTable::ElementAt(gfxContext* aThebesContext,
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int32_t aAppUnitsPerDevPixel,
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gfxFontGroup* aFontGroup,
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char16_t aChar,
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bool aVertical,
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uint32_t aPosition)
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{
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UpdateCache(aThebesContext, aAppUnitsPerDevPixel, aFontGroup, aChar);
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uint32_t parts[4];
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if (!mFontEntry->GetMathVariantsParts(mGlyphID, aVertical, parts)) {
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return kNullGlyph;
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}
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uint32_t glyphID = parts[aPosition];
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if (!glyphID) {
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return kNullGlyph;
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}
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nsGlyphCode glyph;
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glyph.glyphID = glyphID;
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glyph.font = -1;
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return glyph;
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}
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/* virtual */
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nsGlyphCode
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nsOpenTypeTable::BigOf(gfxContext* aThebesContext,
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int32_t aAppUnitsPerDevPixel,
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gfxFontGroup* aFontGroup,
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char16_t aChar,
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bool aVertical,
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uint32_t aSize)
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{
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UpdateCache(aThebesContext, aAppUnitsPerDevPixel, aFontGroup, aChar);
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uint32_t glyphID =
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mFontEntry->GetMathVariantsSize(mGlyphID, aVertical, aSize);
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if (!glyphID) {
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return kNullGlyph;
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}
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nsGlyphCode glyph;
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glyph.glyphID = glyphID;
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glyph.font = -1;
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return glyph;
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}
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/* virtual */
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bool
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nsOpenTypeTable::HasPartsOf(gfxContext* aThebesContext,
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int32_t aAppUnitsPerDevPixel,
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gfxFontGroup* aFontGroup,
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char16_t aChar,
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bool aVertical)
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{
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UpdateCache(aThebesContext, aAppUnitsPerDevPixel, aFontGroup, aChar);
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uint32_t parts[4];
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if (!mFontEntry->GetMathVariantsParts(mGlyphID, aVertical, parts)) {
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return false;
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}
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return parts[0] || parts[1] || parts[2] || parts[3];
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}
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/* virtual */
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gfxTextRun*
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nsOpenTypeTable::MakeTextRun(gfxContext* aThebesContext,
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int32_t aAppUnitsPerDevPixel,
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gfxFontGroup* aFontGroup,
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const nsGlyphCode& aGlyph)
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{
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NS_ASSERTION(aGlyph.IsGlyphID(),
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"nsOpenTypeTable can only access glyphs by id");
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gfxTextRunFactory::Parameters params = {
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aThebesContext, nullptr, nullptr, nullptr, 0, aAppUnitsPerDevPixel
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};
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gfxTextRun* textRun = gfxTextRun::Create(¶ms, 1, aFontGroup, 0);
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textRun->AddGlyphRun(aFontGroup->GetFontAt(0), gfxTextRange::kFontGroup, 0,
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false);
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gfxTextRun::DetailedGlyph detailedGlyph;
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detailedGlyph.mGlyphID = aGlyph.glyphID;
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// We set the advance width to zero and this will be fixed in MeasureTextRun.
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// XXXfredw: We should use gfxHarfbuzzShaper::GetGlyphHAdvance()
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detailedGlyph.mAdvance = 0;
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detailedGlyph.mXOffset = detailedGlyph.mYOffset = 0;
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gfxShapedText::CompressedGlyph g;
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g.SetComplex(true, true, 1);
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textRun->SetGlyphs(0, g, &detailedGlyph);
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return textRun;
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}
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// -----------------------------------------------------------------------------
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// This is the list of all the applicable glyph tables.
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// We will maintain a single global instance that will only reveal those
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@ -311,7 +566,7 @@ public:
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NS_DECL_ISUPPORTS
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NS_DECL_NSIOBSERVER
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nsGlyphTable mUnicodeTable;
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nsPropertiesTable mUnicodeTable;
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nsGlyphTableList()
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: mUnicodeTable(NS_LITERAL_STRING("Unicode"))
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@ -336,15 +591,14 @@ public:
|
||||
GetGlyphTableFor(const nsAString& aFamily);
|
||||
|
||||
private:
|
||||
nsGlyphTable* TableAt(int32_t aIndex) {
|
||||
return &mTableList.ElementAt(aIndex);
|
||||
nsPropertiesTable* PropertiesTableAt(int32_t aIndex) {
|
||||
return &mPropertiesTableList.ElementAt(aIndex);
|
||||
}
|
||||
int32_t Count() {
|
||||
return mTableList.Length();
|
||||
int32_t PropertiesTableCount() {
|
||||
return mPropertiesTableList.Length();
|
||||
}
|
||||
|
||||
// List of glyph tables;
|
||||
nsTArray<nsGlyphTable> mTableList;
|
||||
nsTArray<nsPropertiesTable> mPropertiesTableList;
|
||||
};
|
||||
|
||||
NS_IMPL_ISUPPORTS1(nsGlyphTableList, nsIObserver)
|
||||
@ -405,15 +659,15 @@ nsGlyphTableList::AddGlyphTable(const nsString& aPrimaryFontName)
|
||||
return glyphTable;
|
||||
|
||||
// allocate a table
|
||||
glyphTable = mTableList.AppendElement(aPrimaryFontName);
|
||||
glyphTable = mPropertiesTableList.AppendElement(aPrimaryFontName);
|
||||
return glyphTable;
|
||||
}
|
||||
|
||||
nsGlyphTable*
|
||||
nsGlyphTableList::GetGlyphTableFor(const nsAString& aFamily)
|
||||
{
|
||||
for (int32_t i = 0; i < Count(); i++) {
|
||||
nsGlyphTable* glyphTable = TableAt(i);
|
||||
for (int32_t i = 0; i < PropertiesTableCount(); i++) {
|
||||
nsPropertiesTable* glyphTable = PropertiesTableAt(i);
|
||||
const nsAString& fontName = glyphTable->PrimaryFontName();
|
||||
// TODO: would be nice to consider StripWhitespace and other aliasing
|
||||
if (fontName.Equals(aFamily, nsCaseInsensitiveStringComparator())) {
|
||||
@ -899,6 +1153,11 @@ MeasureTextRun(gfxContext* aThebesContext, gfxTextRun* aTextRun)
|
||||
bm.ascent = NSToCoordCeil(-metrics.mBoundingBox.Y());
|
||||
bm.descent = NSToCoordCeil(metrics.mBoundingBox.YMost());
|
||||
bm.width = NSToCoordRound(metrics.mAdvanceWidth);
|
||||
if (bm.width == 0) {
|
||||
// The advance width was not set in nsGlyphTable::MakeTextRun, so we use
|
||||
// the right bearing instead.
|
||||
bm.width = bm.rightBearing;
|
||||
}
|
||||
|
||||
return bm;
|
||||
}
|
||||
@ -930,8 +1189,12 @@ public:
|
||||
EnumCallback(const nsString& aFamily, bool aGeneric, void *aData);
|
||||
|
||||
private:
|
||||
bool TryVariants(nsGlyphTable* aGlyphTable, const nsAString& aFamily);
|
||||
bool TryParts(nsGlyphTable* aGlyphTable, const nsAString& aFamily);
|
||||
bool TryVariants(nsGlyphTable* aGlyphTable,
|
||||
nsRefPtr<gfxFontGroup>* aFontGroup,
|
||||
const nsAString& aFamily);
|
||||
bool TryParts(nsGlyphTable* aGlyphTable,
|
||||
nsRefPtr<gfxFontGroup>* aFontGroup,
|
||||
const nsAString& aFamily);
|
||||
|
||||
nsMathMLChar* mChar;
|
||||
nsPresContext* mPresContext;
|
||||
@ -957,14 +1220,18 @@ private:
|
||||
// Returns true if the size is OK, false to keep searching.
|
||||
// Always updates the char if a better match is found.
|
||||
bool
|
||||
nsMathMLChar::StretchEnumContext::TryVariants(nsGlyphTable* aGlyphTable,
|
||||
const nsAString& aFamily)
|
||||
nsMathMLChar::
|
||||
StretchEnumContext::TryVariants(nsGlyphTable* aGlyphTable,
|
||||
nsRefPtr<gfxFontGroup>* aFontGroup,
|
||||
const nsAString& aFamily)
|
||||
{
|
||||
// Use our stretchy style context now that stretching is in progress
|
||||
nsStyleContext *sc = mChar->mStyleContext;
|
||||
nsFont font = sc->StyleFont()->mFont;
|
||||
|
||||
bool isVertical = (mDirection == NS_STRETCH_DIRECTION_VERTICAL);
|
||||
nscoord oneDevPixel = mPresContext->AppUnitsPerDevPixel();
|
||||
char16_t uchar = mChar->mData[0];
|
||||
bool largeop = (NS_STRETCH_LARGEOP & mStretchHint) != 0;
|
||||
bool largeopOnly =
|
||||
largeop && (NS_STRETCH_VARIABLE_MASK & mStretchHint) == 0;
|
||||
@ -977,17 +1244,45 @@ nsMathMLChar::StretchEnumContext::TryVariants(nsGlyphTable* aGlyphTable,
|
||||
|
||||
// start at size = 1 (size = 0 is the char at its normal size)
|
||||
int32_t size = 1;
|
||||
nsGlyphCode ch;
|
||||
nscoord displayOperatorMinHeight = 0;
|
||||
if (largeopOnly) {
|
||||
NS_ASSERTION(isVertical, "Stretching should be in the vertical direction");
|
||||
ch = aGlyphTable->BigOf(mThebesContext, oneDevPixel, *aFontGroup, uchar,
|
||||
isVertical, 0);
|
||||
if (ch.IsGlyphID()) {
|
||||
gfxFont* mathFont = aFontGroup->get()->GetFontAt(0);
|
||||
// For OpenType MATH fonts, we will rely on the DisplayOperatorMinHeight
|
||||
// to select the right size variant. Note that the value is sometimes too
|
||||
// small so we use kLargeOpFactor/kIntegralFactor as a minimum value.
|
||||
displayOperatorMinHeight =
|
||||
NSToCoordRound(mathFont->GetFontEntry()->
|
||||
GetMathConstant(gfxFontEntry::DisplayOperatorMinHeight) *
|
||||
mathFont->GetAdjustedSize() * oneDevPixel);
|
||||
nsAutoPtr<gfxTextRun> textRun;
|
||||
textRun = aGlyphTable->MakeTextRun(mThebesContext, oneDevPixel,
|
||||
*aFontGroup, ch);
|
||||
nsBoundingMetrics bm = MeasureTextRun(mThebesContext, textRun);
|
||||
float largeopFactor = kLargeOpFactor;
|
||||
if (NS_STRETCH_INTEGRAL & mStretchHint) {
|
||||
// integrals are drawn taller
|
||||
largeopFactor = kIntegralFactor;
|
||||
}
|
||||
nscoord minHeight = largeopFactor * (bm.ascent + bm.descent);
|
||||
if (displayOperatorMinHeight < minHeight) {
|
||||
displayOperatorMinHeight = minHeight;
|
||||
}
|
||||
}
|
||||
}
|
||||
#ifdef NOISY_SEARCH
|
||||
printf(" searching in %s ...\n",
|
||||
NS_LossyConvertUTF16toASCII(aFamily).get());
|
||||
#endif
|
||||
|
||||
nsGlyphCode ch;
|
||||
nsRefPtr<gfxFontGroup> fontGroup;
|
||||
while ((ch = aGlyphTable->BigOf(mChar->mData[0], size)).Exists()) {
|
||||
while ((ch = aGlyphTable->BigOf(mThebesContext, oneDevPixel, *aFontGroup,
|
||||
uchar, isVertical, size)).Exists()) {
|
||||
|
||||
if (!mChar->SetFontFamily(mPresContext, aGlyphTable, ch, aFamily, font,
|
||||
&fontGroup)) {
|
||||
aFontGroup)) {
|
||||
// if largeopOnly is set, break now
|
||||
if (largeopOnly) break;
|
||||
++size;
|
||||
@ -995,10 +1290,29 @@ nsMathMLChar::StretchEnumContext::TryVariants(nsGlyphTable* aGlyphTable,
|
||||
}
|
||||
|
||||
nsAutoPtr<gfxTextRun> textRun;
|
||||
textRun = aGlyphTable->MakeTextRun(mThebesContext,
|
||||
mPresContext->AppUnitsPerDevPixel(),
|
||||
fontGroup, ch);
|
||||
textRun = aGlyphTable->MakeTextRun(mThebesContext, oneDevPixel,
|
||||
*aFontGroup, ch);
|
||||
nsBoundingMetrics bm = MeasureTextRun(mThebesContext, textRun);
|
||||
if (ch.IsGlyphID()) {
|
||||
gfxFont* mathFont = aFontGroup->get()->GetFontAt(0);
|
||||
if (mathFont->GetFontEntry()->TryGetMathTable(mathFont)) {
|
||||
// MeasureTextRun has set the advance width to the right bearing. We now
|
||||
// subtract the italic correction, so that nsMathMLmmultiscripts will
|
||||
// place the scripts correctly.
|
||||
// Note that STIX-Word does not provide italic corrections
|
||||
// (http://sourceforge.net/p/stixfonts/tracking/50/)
|
||||
gfxFloat italicCorrection;
|
||||
if (mathFont->GetFontEntry()->
|
||||
GetMathItalicsCorrection(ch.glyphID, &italicCorrection)) {
|
||||
bm.width -=
|
||||
NSToCoordRound(italicCorrection *
|
||||
mathFont->GetAdjustedSize() * oneDevPixel);
|
||||
if (bm.width < 0) {
|
||||
bm.width = 0;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
nscoord charSize =
|
||||
isVertical ? bm.ascent + bm.descent
|
||||
@ -1038,8 +1352,10 @@ nsMathMLChar::StretchEnumContext::TryVariants(nsGlyphTable* aGlyphTable,
|
||||
break; // Not making an futher progress, stop searching
|
||||
}
|
||||
|
||||
// if largeopOnly is set, break now
|
||||
if (largeopOnly) break;
|
||||
// If this a largeop only operator, we stop if the glyph is large enough.
|
||||
if (largeopOnly && (bm.ascent + bm.descent) >= displayOperatorMinHeight) {
|
||||
break;
|
||||
}
|
||||
++size;
|
||||
}
|
||||
|
||||
@ -1052,14 +1368,10 @@ nsMathMLChar::StretchEnumContext::TryVariants(nsGlyphTable* aGlyphTable,
|
||||
// Returns true if the size is OK, false to keep searching.
|
||||
// Always updates the char if a better match is found.
|
||||
bool
|
||||
nsMathMLChar::StretchEnumContext::TryParts(nsGlyphTable* aGlyphTable,
|
||||
nsMathMLChar::StretchEnumContext::TryParts(nsGlyphTable* aGlyphTable,
|
||||
nsRefPtr<gfxFontGroup>* aFontGroup,
|
||||
const nsAString& aFamily)
|
||||
{
|
||||
if (!aGlyphTable->HasPartsOf(mChar->mData[0]))
|
||||
return false; // to next table
|
||||
|
||||
// See if the parts of this table fit in the desired space //////////////////
|
||||
|
||||
// Use our stretchy style context now that stretching is in progress
|
||||
nsFont font = mChar->mStyleContext->StyleFont()->mFont;
|
||||
|
||||
@ -1070,20 +1382,24 @@ nsMathMLChar::StretchEnumContext::TryParts(nsGlyphTable* aGlyphTable,
|
||||
nscoord sizedata[4];
|
||||
|
||||
bool isVertical = (mDirection == NS_STRETCH_DIRECTION_VERTICAL);
|
||||
nscoord oneDevPixel = mPresContext->AppUnitsPerDevPixel();
|
||||
char16_t uchar = mChar->mData[0];
|
||||
bool maxWidth = (NS_STRETCH_MAXWIDTH & mStretchHint) != 0;
|
||||
nsRefPtr<gfxFontGroup> fontGroup;
|
||||
if (!aGlyphTable->HasPartsOf(mThebesContext, oneDevPixel, *aFontGroup,
|
||||
uchar, isVertical))
|
||||
return false; // to next table
|
||||
|
||||
for (int32_t i = 0; i < 4; i++) {
|
||||
nsGlyphCode ch = aGlyphTable->ElementAt(mChar->mData[0], i);
|
||||
nsGlyphCode ch = aGlyphTable->ElementAt(mThebesContext, oneDevPixel,
|
||||
*aFontGroup, uchar, isVertical, i);
|
||||
chdata[i] = ch;
|
||||
if (ch.Exists()) {
|
||||
if (!mChar->SetFontFamily(mPresContext, aGlyphTable, ch, aFamily, font,
|
||||
&fontGroup))
|
||||
aFontGroup))
|
||||
return false;
|
||||
|
||||
textRun[i] = aGlyphTable->MakeTextRun(mThebesContext,
|
||||
mPresContext->AppUnitsPerDevPixel(),
|
||||
fontGroup, ch);
|
||||
textRun[i] = aGlyphTable->MakeTextRun(mThebesContext, oneDevPixel,
|
||||
*aFontGroup, ch);
|
||||
nsBoundingMetrics bm = MeasureTextRun(mThebesContext, textRun[i]);
|
||||
|
||||
// TODO: For the generic Unicode table, ideally we should check that the
|
||||
@ -1203,15 +1519,6 @@ nsMathMLChar::StretchEnumContext::EnumCallback(const nsString& aFamily,
|
||||
{
|
||||
StretchEnumContext* context = static_cast<StretchEnumContext*>(aData);
|
||||
|
||||
// See if there is a special table for the family, but always use the
|
||||
// Unicode table for generic fonts.
|
||||
nsGlyphTable* glyphTable = aGeneric ?
|
||||
&gGlyphTableList->mUnicodeTable :
|
||||
gGlyphTableList->GetGlyphTableFor(aFamily);
|
||||
|
||||
if (context->mTablesTried.Contains(glyphTable))
|
||||
return true; // already tried this one
|
||||
|
||||
// Check font family if it is not a generic one
|
||||
// We test with the kNullGlyph
|
||||
nsStyleContext *sc = context->mChar->mStyleContext;
|
||||
@ -1222,10 +1529,31 @@ nsMathMLChar::StretchEnumContext::EnumCallback(const nsString& aFamily,
|
||||
font, &fontGroup))
|
||||
return true; // Could not set the family
|
||||
|
||||
// Now see if the table has a glyph that matches the container
|
||||
// Determine the glyph table to use for this font.
|
||||
nsAutoPtr<nsOpenTypeTable> openTypeTable;
|
||||
nsGlyphTable* glyphTable;
|
||||
if (aGeneric) {
|
||||
// This is a generic font, use the Unicode table.
|
||||
glyphTable = &gGlyphTableList->mUnicodeTable;
|
||||
} else {
|
||||
// If the font contains an Open Type MATH table, use it.
|
||||
openTypeTable = nsOpenTypeTable::Create(fontGroup->GetFontAt(0));
|
||||
if (openTypeTable) {
|
||||
glyphTable = openTypeTable;
|
||||
} else {
|
||||
// Otherwise try to find a .properties file corresponding to that font
|
||||
// family or fallback to the Unicode table.
|
||||
glyphTable = gGlyphTableList->GetGlyphTableFor(aFamily);
|
||||
}
|
||||
}
|
||||
|
||||
// Only try this table once.
|
||||
context->mTablesTried.AppendElement(glyphTable);
|
||||
if (!openTypeTable) {
|
||||
if (context->mTablesTried.Contains(glyphTable))
|
||||
return true; // already tried this one
|
||||
|
||||
// Only try this table once.
|
||||
context->mTablesTried.AppendElement(glyphTable);
|
||||
}
|
||||
|
||||
// If the unicode table is being used, then search all font families. If a
|
||||
// special table is being used then the font in this family should have the
|
||||
@ -1233,8 +1561,9 @@ nsMathMLChar::StretchEnumContext::EnumCallback(const nsString& aFamily,
|
||||
const nsAString& family = glyphTable == &gGlyphTableList->mUnicodeTable ?
|
||||
context->mFamilies : aFamily;
|
||||
|
||||
if((context->mTryVariants && context->TryVariants(glyphTable, family)) ||
|
||||
(context->mTryParts && context->TryParts(glyphTable, family)))
|
||||
if((context->mTryVariants &&
|
||||
context->TryVariants(glyphTable, &fontGroup, family)) ||
|
||||
(context->mTryParts && context->TryParts(glyphTable, &fontGroup, family)))
|
||||
return false; // no need to continue
|
||||
|
||||
return true; // true means continue
|
||||
@ -1470,7 +1799,7 @@ nsMathMLChar::StretchInternal(nsPresContext* aPresContext,
|
||||
// apply a scale transform to the base char.
|
||||
if (!glyphFound && largeop) {
|
||||
float scale;
|
||||
float largeopFactor = float(M_SQRT2);
|
||||
float largeopFactor = kLargeOpFactor;
|
||||
|
||||
// increase the width if it is not largeopFactor times larger
|
||||
// than the initial one.
|
||||
@ -1491,7 +1820,7 @@ nsMathMLChar::StretchInternal(nsPresContext* aPresContext,
|
||||
// than the initial one.
|
||||
if (NS_STRETCH_INTEGRAL & aStretchHint) {
|
||||
// integrals are drawn taller
|
||||
largeopFactor = 2.0;
|
||||
largeopFactor = kIntegralFactor;
|
||||
}
|
||||
if ((aDesiredStretchSize.ascent + aDesiredStretchSize.descent) <
|
||||
largeopFactor * (initialSize.ascent + initialSize.descent)) {
|
||||
|
||||
@ -199,6 +199,8 @@ public:
|
||||
|
||||
protected:
|
||||
friend class nsGlyphTable;
|
||||
friend class nsPropertiesTable;
|
||||
friend class nsOpenTypeTable;
|
||||
nsString mData;
|
||||
|
||||
private:
|
||||
|
||||
Loading…
Reference in New Issue
Block a user