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## org.apache.fop.complexscripts.scripts
Class IndicScriptProcessor

    java.lang.Object
      org.apache.fop.complexscripts.scripts.ScriptProcessor
          org.apache.fop.complexscripts.scripts.DefaultScriptProcessor
              org.apache.fop.complexscripts.scripts.IndicScriptProcessor

Direct Known Subclasses:
  DevanagariScriptProcessor, GujaratiScriptProcessor, GurmukhiScriptProcessor, TamilScriptProcessor

    public class IndicScriptProcessor

extends DefaultScriptProcessor

The `IndicScriptProcessor` class implements a script processor for performing glyph substitution and positioning operations on content associated with the Indic script.

This work was originally authored by Glenn Adams (gadams@apache.org).

Nested Class Summary
`protected static class` | `IndicScriptProcessor.DefaultSyllabizer` Default syllabizer.
`protected static class` | `IndicScriptProcessor.Segment` Syllabic segment.
`protected static class` | `IndicScriptProcessor.Syllabizer` Abstract syllabizer.

Method Summary
`protected int` | `findPreBaseMatra(GlyphSequence gs)` Find pre-base matra in sequence.
`protected int` | `findPreBaseMatraTarget(GlyphSequence gs, int source)` Find pre-base matra target in sequence.
`protected int` | `findReph(GlyphSequence gs)` Find reph in sequence.
`protected int` | `findRephTarget(GlyphSequence gs, int source)` Find reph target in sequence.
`java.lang.String[]` | `getOptionalPositioningFeatures()` Obtain script specific optional positioning features.
`java.lang.String[]` | `getOptionalSubstitutionFeatures()` Obtain script specific optional substitution features.
`ScriptContextTester` | `getPositioningContextTester()` Obtain script specific positioning context tester.
`java.lang.String[]` | `getPositioningFeatures()` Obtain script specific required positioning features.
`ScriptContextTester` | `getSubstitutionContextTester()` Obtain script specific substitution context tester.
`java.lang.String[]` | `getSubstitutionFeatures()` Obtain script specific required substitution features.
`protected java.lang.Class<? extends IndicScriptProcessor.Syllabizer>` | `getSyllabizerClass()` Get script specific syllabizer class.
`static ScriptProcessor` | `makeProcessor(java.lang.String script)` Make script specific flavor of Indic script processor.
`boolean` | `position(GlyphSequence gs, java.lang.String script, java.lang.String language, int fontSize, GlyphTable.UseSpec[] usa, int[] widths, int[][] adjustments, ScriptContextTester sct)` Perform positioning processing using a specific set of ordered glyph table use specifications.
`GlyphSequence` | `substitute(GlyphSequence gs, java.lang.String script, java.lang.String language, GlyphTable.UseSpec[] usa, ScriptContextTester sct)` Perform substitution processing using a specific set of ordered glyph table use specifications.

Methods inherited from class org.apache.fop.complexscripts.scripts.DefaultScriptProcessor
`isReorderedMark, reorderCombiningMarks`

Methods inherited from class org.apache.fop.complexscripts.scripts.ScriptProcessor
`assembleLookups, getInstance, getScript, position, substitute`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Method Detail

### makeProcessor

    public static ScriptProcessor makeProcessor(java.lang.String script)

  Make script specific flavor of Indic script processor.

  Parameters:
    `script` - tag
  Returns:
    script processor instance

### getSubstitutionFeatures

    public java.lang.String[] getSubstitutionFeatures()

  Obtain script specific required substitution features.

  Overrides:
    `getSubstitutionFeatures` in class `DefaultScriptProcessor`
  Returns:
    array of suppported substitution features or null

### getOptionalSubstitutionFeatures

    public java.lang.String[] getOptionalSubstitutionFeatures()

  Obtain script specific optional substitution features.

  Overrides:
    `getOptionalSubstitutionFeatures` in class `ScriptProcessor`
  Returns:
    array of suppported substitution features or null

### getSubstitutionContextTester

    public ScriptContextTester getSubstitutionContextTester()

  Obtain script specific substitution context tester.

  Overrides:
    `getSubstitutionContextTester` in class `DefaultScriptProcessor`
  Returns:
    substitution context tester or null

### getPositioningFeatures

    public java.lang.String[] getPositioningFeatures()

  Obtain script specific required positioning features.

  Overrides:
    `getPositioningFeatures` in class `DefaultScriptProcessor`
  Returns:
    array of suppported positioning features or null

### getOptionalPositioningFeatures

    public java.lang.String[] getOptionalPositioningFeatures()

  Obtain script specific optional positioning features.

  Overrides:
    `getOptionalPositioningFeatures` in class `ScriptProcessor`
  Returns:
    array of suppported positioning features or null

### getPositioningContextTester

    public ScriptContextTester getPositioningContextTester()

  Obtain script specific positioning context tester.

  Overrides:
    `getPositioningContextTester` in class `DefaultScriptProcessor`
  Returns:
    positioning context tester or null

### substitute

    public GlyphSequence substitute(GlyphSequence gs,
                                    java.lang.String script,
                                    java.lang.String language,
                                    GlyphTable.UseSpec[] usa,
                                    ScriptContextTester sct)

  Perform substitution processing using a specific set of ordered glyph table use specifications.

  Overrides:
    `substitute` in class `ScriptProcessor`
  Parameters:
    `gs` - an input glyph sequence
    `script` - a script identifier
    `language` - a language identifier
    `usa` - an ordered array of glyph table use specs
    `sct` - a script specific context tester (or null)
  Returns:
    the substituted (output) glyph sequence

### getSyllabizerClass

    protected java.lang.Class<? extends IndicScriptProcessor.Syllabizer> getSyllabizerClass()

  Get script specific syllabizer class.

  Returns:
    a syllabizer class object or null

### findPreBaseMatra

    protected int findPreBaseMatra(GlyphSequence gs)

  Find pre-base matra in sequence.

  Parameters:
    `gs` - input sequence
  Returns:
    index of pre-base matra or -1 if not found

### findPreBaseMatraTarget

    protected int findPreBaseMatraTarget(GlyphSequence gs,
                                         int source)

  Find pre-base matra target in sequence.

  Parameters:
    `gs` - input sequence
    `source` - index of pre-base matra
  Returns:
    index of pre-base matra target or -1

### findReph

    protected int findReph(GlyphSequence gs)

  Find reph in sequence.

  Parameters:
    `gs` - input sequence
  Returns:
    index of reph or -1 if not found

### findRephTarget

    protected int findRephTarget(GlyphSequence gs,
                                 int source)

  Find reph target in sequence.

  Parameters:
    `gs` - input sequence
    `source` - index of reph
  Returns:
    index of reph target or -1

### position

    public boolean position(GlyphSequence gs,
                            java.lang.String script,
                            java.lang.String language,
                            int fontSize,
                            GlyphTable.UseSpec[] usa,
                            int[] widths,
                            int[][] adjustments,
                            ScriptContextTester sct)

  Perform positioning processing using a specific set of ordered glyph table use specifications.

  Overrides:
    `position` in class `ScriptProcessor`
  Parameters:
    `gs` - an input glyph sequence
    `script` - a script identifier
    `language` - a language identifier
    `fontSize` - size in device units
    `usa` - an ordered array of glyph table use specs
    `widths` - array of default advancements for each glyph in font
    `adjustments` - accumulated adjustments array (sequence) of 4-tuples of placement [PX,PY] and advance [AX,AY] adjustments, in that order, with one 4-tuple for each element of glyph sequence
    `sct` - a script specific context tester (or null)
  Returns:
    true if some adjustment is not zero; otherwise, false

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