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SCRIPT_PROPERTIES (Windows Embedded CE 6.0)

  • Artigo

1/6/2010

This structure has information about special processing for each script.

Syntax

typedef struct {
  DWORD langid;  
  DWORD fNumeric;
  DWORD fComplex;
  DWORD fNeedsWordBreaking;
  DWORD fNeedsCaretInfo;
  DWORD bCharSet;   
  DWORD fControl;   
  DWORD fPrivateUseArea;   
  DWORD fNeedsCharacterJustify;
  DWORD fInvalidGlyph;
  DWORD fInvalidLogAttr;
  DWORD fCDM;
  DWORD fAmbiguousCharSet;
  DWORD fClusterSizeVaries;
  DWORD fRejectInvalid;
} SCRIPT_PROPERTIES;

Members

  • langid
    Primary language and sublanguage associated with the script. When a script is used for many languages, langid represents a default language. For example, Western script is represented by LANG_ENGLISH although it is also used for French, German, and other European languages.
  • fNumeric
    If set, the script contains only digits and the other characters used in writing numbers by the rules of the Unicode bidirectional algorithm. For example, currency symbols, the thousands separator, and the decimal point are classified as numeric when adjacent to or between digits.
  • fComplex
    If set, the script for the language requires special shaping or layout. If fComplex is false, the script contains no combining characters and requires no contextual shaping or reordering.

  • fNeedsWordBreaking
    If set, the word break placement for the language requires that the application call ScriptBreak and that word break placement include character positions marked as fWordStop in SCRIPT_LOGATTR.

    If not set, word break placement is identified by scanning for characters marked as fWhiteSpace in SCRIPT_LOGATTR, or for glyphs marked as uJustify == SCRIPT_JUSTIFY_BLANK or SCRIPT_JUSTIFY_ARABIC_BLANK in SCRIPT_VISATTR.

  • fNeedsCaretInfo
    If set, this language restricts caret placement to cluster boundaries, for example, Thai and Indian. To determine valid caret positions, inspect the fCharStop flag in the logical attributes returned by ScriptBreak, or compare adjacent values in the pwLogClust array returned by ScriptShape.

    ScriptXtoCP and ScriptCPtoX automatically apply caret placement restrictions.

  • bCharSet
    The nominal charset associated with the script. This charset may be used in a log font when creating a font suitable for displaying this script.

    For a new script where no charset is defined, bCharSet may be inappropriate. In this case, use DEFAULT_CHARSET instead. See the description of fAmbiguousCharSet.

  • fControl
    If set, the script contains only control characters.
  • fPrivateUseArea
    If set, the script uses a special set of characters that is privately defined for the Unicode range U+E000 through U+F8FF.
  • fNeedsCharacterJustify
    If set, justification for the script is achieved by increasing the space between all letters, not only between words. When performing inter-character justification, insert extra space only after glyphs marked with SCRIPT_VISATTR.uJustify == SCRIPT_JUSTIFY_CHARACTER.
  • fInvalidGlyph
    If set, this is a script for which ScriptShape generates an invalid glyph to represent invalid sequences. That is, it generates wgInvalid in the glyph buffer. The glyph index of the invalid glyph for a particular font may be obtained by calling ScriptGetFontProperties.
  • fInvalidLogAttr
    If set, this is a script for which ScriptBreak marks invalid combinations by setting fInvalid in the logical attributes buffer.
  • fCDM
    If set, the script contains an item that was analyzed by ScriptItemize as including Combining Diacritical Marks (U+0300 through U+36F).
  • fAmbiguousCharSet
    If set, the script contains characters that are supported by more than one charset. For more information, see the Remarks section . The bCharSet member should be set to DEFAULT_CHARSET.
  • fClusterSizeVaries
    If set, this is a script, such as Arabic, in which contextual shaping may cause a string to increase in size when removing characters.
  • fRejectInvalid
    If set, this is a script, such as Thai, where invalid sequences conventionally cause an editor program such as Notepad to beep and ignore keystrokes.

Remarks

This structure is filled by the ScriptGetProperties function.

Many Uniscribe scripts do not correspond directly to 8-bit character sets. In the case where some of their characters are supported by more than one charset, the fAmbiguousCharSet member is set. The Uniscribe client should do further processing to determine which charset to use when requesting a font suitable for the run. For example, it may determine that the run consists of multiple languages and split the run so that each language uses a different font.

Requirements

Header usp10.h
Windows Embedded CE Windows CE 5.0 and later

See Also

Reference

ScriptBreak
ScriptCPtoX
ScriptGetProperties
ScriptGetFontProperties
ScriptItemize
ScriptShape
ScriptXtoCP
SCRIPT_CONTROL
SCRIPT_LOGATTR
SCRIPT_VISATTR

Other Resources

Uniscribe Structures