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//-----------------------------------------------------------------------
//
// Microsoft Windows Client Platform
// Copyright (C) Microsoft Corporation
//
// File: TextRunTypographyProperties.cs
//
// Contents: Text run Typography properties
//
// Spec: http://team/sites/Avalon/Specs/Text%20Formatting%20API.doc
//
// Created: 1-7-2005 Sergey Malkin (SergeyM)
//
//------------------------------------------------------------------------
using System;
using System.Windows;
using MS.Internal.Text.TextInterface;
using MS.Internal.Shaping;
namespace System.Windows.Media.TextFormatting
{
/// <summary>
/// Text run typography properties
///
/// Client set properties to generate set of features
/// that will be processed by OpenType layout engine.
///
/// For details see OpenType font specification at
/// http://www.microsoft.com/typography/
///
/// </summary>
public abstract class TextRunTypographyProperties
{
#region Public typography properties
/// <summary>
/// Common ligatures assisting with text readability.
/// Examples: fi, fl ligatures
/// </summary>
public abstract bool StandardLigatures
{ get; }
/// <summary>
/// Ligature forms depending on surrounding context
/// </summary>
public abstract bool ContextualLigatures
{ get; }
/// <summary>
/// Additional ligatures to assist with text readability
/// Examples: Qu, Th
/// </summary>
public abstract bool DiscretionaryLigatures
{ get; }
/// <summary>
/// Ligatures used in historical typography
/// Examples: ct, st
/// </summary>
public abstract bool HistoricalLigatures
{ get; }
/// <summary>
/// Custom forms defined by surrounding context
/// Examples: multiple medial forms in Urdu Nastaliq fonts
/// </summary>
public abstract bool ContextualAlternates
{ get; }
/// <summary>
/// Forms commonly used in the past
/// Examples: long s, old Fraktur k
/// </summary>
public abstract bool HistoricalForms
{ get; }
/// <summary>
/// Feature adjusting spacing between charactersto enchance word shape
/// </summary>
public abstract bool Kerning
{ get; }
/// <summary>
/// Feature adjusting inter-glyph spacing to provide better readability for all-`capital text
/// </summary>
public abstract bool CapitalSpacing
{ get; }
/// <summary>
/// Feature adjusting punctuation types of characters to the case of the surrounding glyphs
/// </summary>
public abstract bool CaseSensitiveForms
{ get; }
/// <summary>
/// Font specific set of glyph forms designed to work with each other.
/// </summary>
public abstract bool StylisticSet1
{ get; }
/// <summary>
/// Font-specific set of glyph forms designed to work with each other.
/// </summary>
public abstract bool StylisticSet2
{ get; }
/// <summary>
/// Font-specific set of glyph forms designed to work with each other.
/// </summary>
public abstract bool StylisticSet3
{ get; }
/// <summary>
/// Font-specific set of glyph forms designed to work with each other.
/// </summary>
public abstract bool StylisticSet4
{ get; }
/// <summary>
/// Font-specific set of glyph forms designed to work with each other.
/// </summary>
public abstract bool StylisticSet5
{ get; }
/// <summary>
/// Font-specific set of glyph forms designed to work with each other.
/// </summary>
public abstract bool StylisticSet6
{ get; }
/// <summary>
/// Font-specific set of glyph forms designed to work with each other.
/// </summary>
public abstract bool StylisticSet7
{ get; }
/// <summary>
/// Font-specific set of glyph forms designed to work with each other.
/// </summary>
public abstract bool StylisticSet8
{ get; }
/// <summary>
/// Font-specific set of glyph forms designed to work with each other.
/// </summary>
public abstract bool StylisticSet9
{ get; }
/// <summary>
/// Font-specific set of glyph forms designed to work with each other.
/// </summary>
public abstract bool StylisticSet10
{ get; }
/// <summary>
/// Font-specific set of glyph forms designed to work with each other.
/// </summary>
public abstract bool StylisticSet11
{ get; }
/// <summary>
/// Font-specific set of glyph forms designed to work with each other.
/// </summary>
public abstract bool StylisticSet12
{ get; }
/// <summary>
/// Font-specific set of glyph forms designed to work with each other.
/// </summary>
public abstract bool StylisticSet13
{ get; }
/// <summary>
/// Font-specific set of glyph forms designed to work with each other.
/// </summary>
public abstract bool StylisticSet14
{ get; }
/// <summary>
/// Font-specific set of glyph forms designed to work with each other.
/// </summary>
public abstract bool StylisticSet15
{ get; }
/// <summary>
/// Font-specific set of glyph forms designed to work with each other.
/// </summary>
public abstract bool StylisticSet16
{ get; }
/// <summary>
/// Font-specific set of glyph forms designed to work with each other.
/// </summary>
public abstract bool StylisticSet17
{ get; }
/// <summary>
/// Font-specific set of glyph forms designed to work with each other.
/// </summary>
public abstract bool StylisticSet18
{ get; }
/// <summary>
/// Font-specific set of glyph forms designed to work with each other.
/// </summary>
public abstract bool StylisticSet19
{ get; }
/// <summary>
/// Font-specific set of glyph forms designed to work with each other.
/// </summary>
public abstract bool StylisticSet20
{ get; }
/// <summary>
/// Substitute nominal zero with slashed zero.
/// </summary>
public abstract bool SlashedZero
{ get; }
/// <summary>
/// Substitute regular greek forms with forms used in mathematical notation.
/// </summary>
public abstract bool MathematicalGreek
{ get; }
/// <summary>
/// Replace standard forms in Japaneese fonts with preferred typographic forms
/// </summary>
public abstract bool EastAsianExpertForms
{ get; }
/// <summary>
/// Render different types of typographic variations. Include Normal, Subscript, Superscript,
/// Inferior, Ordinal and Ruby.
/// </summary>
public abstract FontVariants Variants
{ get; }
/// <summary>
/// Select set of `capital forms from Normal, SmallCaps, AllSmallCaps,
/// PetiteCaps, AllPetiteCaps, Unicase and Titling.
/// </summary>
public abstract FontCapitals Capitals
{ get; }
/// <summary>
/// Feature selecting special fractional forms of nominator, denominator and slash.
/// </summary>
public abstract FontFraction Fraction { get; }
/// <summary>
/// Select set of glyphs to render alternate numeral forms from Normal, OldStyle and Lining
/// </summary>
public abstract FontNumeralStyle NumeralStyle
{ get; }
/// <summary>
/// Select glyph set for different numeral aligning options from Default, Proportional and Tabular
/// </summary>
public abstract FontNumeralAlignment NumeralAlignment
{ get; }
/// <summary>
/// Select from different width styles for Latin characters in East Asian fonts.
/// </summary>
public abstract FontEastAsianWidths EastAsianWidths
{ get; }
/// <summary>
/// Select glyphs forms specific for particular writing system and language.
/// </summary>
public abstract FontEastAsianLanguage EastAsianLanguage
{ get; }
/// <summary>
/// Select glyph forms having swashes by specified index.
/// Examples: Q with tail extended under following letter
/// </summary>
public abstract int StandardSwashes
{ get; }
/// <summary>
/// Select swash forms of glyphs by specified index and based on surrounding characters.
/// Examples: d with flourish occupying space above following ea.
/// </summary>
public abstract int ContextualSwashes
{ get; }
/// <summary>
/// Select alternate form of glyphs by specified index.
/// Examples: multiple forms of ampersand.
/// </summary>
public abstract int StylisticAlternates
{ get; }
/// <summary>
/// Forms commonly used in notation.
/// Examples: characters placed in circles, parentheses
/// </summary>
public abstract int AnnotationAlternates
{ get; }
#endregion Public typography properties
/// <summary>
/// Should be called every time any property changes it's value
/// </summary>
protected void OnPropertiesChanged()
{
_features = null;
}
/// <summary>
/// cached feature array.
/// </summary>
internal DWriteFontFeature[] CachedFeatureSet
{
get
{
return _features;
}
set
{
_features = value;
}
}
private DWriteFontFeature[] _features = null;
}
}
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