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MathConstant

read_fonts::tables::math

Enum MathConstant

#[repr(u8)]pub enum MathConstant {
Show 56 variants    ScriptPercentScaleDown = 0,
    ScriptScriptPercentScaleDown = 1,
    DelimitedSubFormulaMinHeight = 2,
    DisplayOperatorMinHeight = 3,
    MathLeading = 4,
    AxisHeight = 5,
    AccentBaseHeight = 6,
    FlattenedAccentBaseHeight = 7,
    SubscriptShiftDown = 8,
    SubscriptTopMax = 9,
    SubscriptBaselineDropMin = 10,
    SuperscriptShiftUp = 11,
    SuperscriptShiftUpCramped = 12,
    SuperscriptBottomMin = 13,
    SuperscriptBaselineDropMax = 14,
    SubSuperscriptGapMin = 15,
    SuperscriptBottomMaxWithSubscript = 16,
    SpaceAfterScript = 17,
    UpperLimitGapMin = 18,
    UpperLimitBaselineRiseMin = 19,
    LowerLimitGapMin = 20,
    LowerLimitBaselineDropMin = 21,
    StackTopShiftUp = 22,
    StackTopDisplayStyleShiftUp = 23,
    StackBottomShiftDown = 24,
    StackBottomDisplayStyleShiftDown = 25,
    StackGapMin = 26,
    StackDisplayStyleGapMin = 27,
    StretchStackTopShiftUp = 28,
    StretchStackBottomShiftDown = 29,
    StretchStackGapAboveMin = 30,
    StretchStackGapBelowMin = 31,
    FractionNumeratorShiftUp = 32,
    FractionNumeratorDisplayStyleShiftUp = 33,
    FractionDenominatorShiftDown = 34,
    FractionDenominatorDisplayStyleShiftDown = 35,
    FractionNumeratorGapMin = 36,
    FractionNumDisplayStyleGapMin = 37,
    FractionRuleThickness = 38,
    FractionDenominatorGapMin = 39,
    FractionDenomDisplayStyleGapMin = 40,
    SkewedFractionHorizontalGap = 41,
    SkewedFractionVerticalGap = 42,
    OverbarVerticalGap = 43,
    OverbarRuleThickness = 44,
    OverbarExtraAscender = 45,
    UnderbarVerticalGap = 46,
    UnderbarRuleThickness = 47,
    UnderbarExtraDescender = 48,
    RadicalVerticalGap = 49,
    RadicalDisplayStyleVerticalGap = 50,
    RadicalRuleThickness = 51,
    RadicalExtraAscender = 52,
    RadicalKernBeforeDegree = 53,
    RadicalKernAfterDegree = 54,
    RadicalDegreeBottomRaisePercent = 55,
}

Expand description

A constant in the MathConstants subtable.

The values must match HarfBuzz’s hb_ot_math_constant_t, which is also the order the OpenType spec lists the fields in.

Variants§

ScriptPercentScaleDown = 0

See MathConstants::script_percent_scale_down.

ScriptScriptPercentScaleDown = 1

See MathConstants::script_script_percent_scale_down.

DelimitedSubFormulaMinHeight = 2

See MathConstants::delimited_sub_formula_min_height.

DisplayOperatorMinHeight = 3

See MathConstants::display_operator_min_height.

MathLeading = 4

See MathConstants::math_leading.

AxisHeight = 5

See MathConstants::axis_height.

AccentBaseHeight = 6

See MathConstants::accent_base_height.

FlattenedAccentBaseHeight = 7

See MathConstants::flattened_accent_base_height.

SubscriptShiftDown = 8

See MathConstants::subscript_shift_down.

SubscriptTopMax = 9

See MathConstants::subscript_top_max.

SubscriptBaselineDropMin = 10

See MathConstants::subscript_baseline_drop_min.

SuperscriptShiftUp = 11

See MathConstants::superscript_shift_up.

SuperscriptShiftUpCramped = 12

See MathConstants::superscript_shift_up_cramped.

SuperscriptBottomMin = 13

See MathConstants::superscript_bottom_min.

SuperscriptBaselineDropMax = 14

See MathConstants::superscript_baseline_drop_max.

SubSuperscriptGapMin = 15

See MathConstants::sub_superscript_gap_min.

SuperscriptBottomMaxWithSubscript = 16

See MathConstants::superscript_bottom_max_with_subscript.

SpaceAfterScript = 17

See MathConstants::space_after_script.

UpperLimitGapMin = 18

See MathConstants::upper_limit_gap_min.

UpperLimitBaselineRiseMin = 19

See MathConstants::upper_limit_baseline_rise_min.

LowerLimitGapMin = 20

See MathConstants::lower_limit_gap_min.

LowerLimitBaselineDropMin = 21

See MathConstants::lower_limit_baseline_drop_min.

StackTopShiftUp = 22

See MathConstants::stack_top_shift_up.

StackTopDisplayStyleShiftUp = 23

See MathConstants::stack_top_display_style_shift_up.

StackBottomShiftDown = 24

See MathConstants::stack_bottom_shift_down.

StackBottomDisplayStyleShiftDown = 25

See MathConstants::stack_bottom_display_style_shift_down.

StackGapMin = 26

See MathConstants::stack_gap_min.

StackDisplayStyleGapMin = 27

See MathConstants::stack_display_style_gap_min.

StretchStackTopShiftUp = 28

See MathConstants::stretch_stack_top_shift_up.

StretchStackBottomShiftDown = 29

See MathConstants::stretch_stack_bottom_shift_down.

StretchStackGapAboveMin = 30

See MathConstants::stretch_stack_gap_above_min.

StretchStackGapBelowMin = 31

See MathConstants::stretch_stack_gap_below_min.

FractionNumeratorShiftUp = 32

See MathConstants::fraction_numerator_shift_up.

FractionNumeratorDisplayStyleShiftUp = 33

See MathConstants::fraction_numerator_display_style_shift_up.

FractionDenominatorShiftDown = 34

See MathConstants::fraction_denominator_shift_down.

FractionDenominatorDisplayStyleShiftDown = 35

See MathConstants::fraction_denominator_display_style_shift_down.

FractionNumeratorGapMin = 36

See MathConstants::fraction_numerator_gap_min.

FractionNumDisplayStyleGapMin = 37

See MathConstants::fraction_num_display_style_gap_min.

FractionRuleThickness = 38

See MathConstants::fraction_rule_thickness.

FractionDenominatorGapMin = 39

See MathConstants::fraction_denominator_gap_min.

FractionDenomDisplayStyleGapMin = 40

See MathConstants::fraction_denom_display_style_gap_min.

SkewedFractionHorizontalGap = 41

See MathConstants::skewed_fraction_horizontal_gap.

SkewedFractionVerticalGap = 42

See MathConstants::skewed_fraction_vertical_gap.

OverbarVerticalGap = 43

See MathConstants::overbar_vertical_gap.

OverbarRuleThickness = 44

See MathConstants::overbar_rule_thickness.

OverbarExtraAscender = 45

See MathConstants::overbar_extra_ascender.

UnderbarVerticalGap = 46

See MathConstants::underbar_vertical_gap.

UnderbarRuleThickness = 47

See MathConstants::underbar_rule_thickness.

UnderbarExtraDescender = 48

See MathConstants::underbar_extra_descender.

RadicalVerticalGap = 49

See MathConstants::radical_vertical_gap.

RadicalDisplayStyleVerticalGap = 50

See MathConstants::radical_display_style_vertical_gap.

RadicalRuleThickness = 51

See MathConstants::radical_rule_thickness.

RadicalExtraAscender = 52

See MathConstants::radical_extra_ascender.

RadicalKernBeforeDegree = 53

See MathConstants::radical_kern_before_degree.

RadicalKernAfterDegree = 54

See MathConstants::radical_kern_after_degree.

RadicalDegreeBottomRaisePercent = 55

See MathConstants::radical_degree_bottom_raise_percent.

Implementations§

impl MathConstant

pub const ALL: &'static [MathConstant]

Every constant, in the order the spec lists them.

A constant’s position here is its numeric value.

pub fn new(value: u8) -> Option<Self>

The constant with a given numeric value, or None if the value names no constant.

Trait Implementations§

impl Clone for MathConstant

fn clone(&self) -> Self

Returns a duplicate of the value. Read more

1.0.0 (const: unstable) · Source§

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more

impl Copy for MathConstant

impl Debug for MathConstant

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more

impl Eq for MathConstant

impl PartialEq for MathConstant

fn eq(&self, other: &Self) -> bool

Equality operator ==. Read more

1.0.0 (const: unstable) · Source§

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=. Read more

impl StructuralPartialEq for MathConstant

Auto Trait Implementations§

impl Freeze for MathConstant

impl RefUnwindSafe for MathConstant

impl Send for MathConstant

impl Sync for MathConstant

impl Unpin for MathConstant

impl UnsafeUnpin for MathConstant

impl UnwindSafe for MathConstant

Blanket Implementations§

impl<T> Any for T
where T: 'static + ?Sized,

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

impl<T> Borrow<T> for T
where T: ?Sized,

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

impl<T> BorrowMut<T> for T
where T: ?Sized,

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more

impl<T> CloneToUninit for T
where T: Clone,

unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)

Performs copy-assignment from self to dest. Read more

impl<T> ErasedDestructor for T
where T: 'static,

impl<T> From<T> for T

fn from(t: T) -> T

Returns the argument unchanged.

impl<T, U> Into<U> for T
where U: From<T>,

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

impl<T> ToOwned for T
where T: Clone,

type Owned = T

The resulting type after obtaining ownership.

fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more

fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more

impl<T, U> TryFrom<U> for T
where U: Into<T>,

type Error = !

The type returned in the event of a conversion error.

fn try_from(value: U) -> Result<T, !>

Performs the conversion.

impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.