--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/fontservices/textshaperplugin/IcuSource/common/unicode/brkiter.h Tue Feb 02 02:02:46 2010 +0200
@@ -0,0 +1,668 @@
+/*
+********************************************************************************
+* Copyright (C) 1997-2005, International Business Machines
+* Corporation and others. All Rights Reserved.
+********************************************************************************
+*
+* File brkiter.h
+*
+* Modification History:
+*
+* Date Name Description
+* 02/18/97 aliu Added typedef for TextCount. Made DONE const.
+* 05/07/97 aliu Fixed DLL declaration.
+* 07/09/97 jfitz Renamed BreakIterator and interface synced with JDK
+* 08/11/98 helena Sync-up JDK1.2.
+* 01/13/2000 helena Added UErrorCode parameter to createXXXInstance methods.
+********************************************************************************
+*/
+
+#ifndef BRKITER_H
+#define BRKITER_H
+
+#include "unicode/utypes.h"
+
+/**
+ * \file
+ * \brief C++ API: Break Iterator.
+ */
+
+#if UCONFIG_NO_BREAK_ITERATION
+
+U_NAMESPACE_BEGIN
+
+/*
+ * Allow the declaration of APIs with pointers to BreakIterator
+ * even when break iteration is removed from the build.
+ */
+class BreakIterator;
+
+U_NAMESPACE_END
+
+#else
+
+#include "unicode/uobject.h"
+#include "unicode/unistr.h"
+#include "unicode/chariter.h"
+#include "unicode/locid.h"
+#include "unicode/ubrk.h"
+#include "unicode/strenum.h"
+#include "unicode/utext.h"
+
+U_NAMESPACE_BEGIN
+
+#if !UCONFIG_NO_SERVICE
+/**
+ * Opaque type returned by registerInstance.
+ * @stable
+ */
+typedef const void* URegistryKey;
+#endif
+
+/**
+ * The BreakIterator class implements methods for finding the location
+ * of boundaries in text. BreakIterator is an abstract base class.
+ * Instances of BreakIterator maintain a current position and scan over
+ * text returning the index of characters where boundaries occur.
+ * <P>
+ * Line boundary analysis determines where a text string can be broken
+ * when line-wrapping. The mechanism correctly handles punctuation and
+ * hyphenated words.
+ * <P>
+ * Sentence boundary analysis allows selection with correct
+ * interpretation of periods within numbers and abbreviations, and
+ * trailing punctuation marks such as quotation marks and parentheses.
+ * <P>
+ * Word boundary analysis is used by search and replace functions, as
+ * well as within text editing applications that allow the user to
+ * select words with a double click. Word selection provides correct
+ * interpretation of punctuation marks within and following
+ * words. Characters that are not part of a word, such as symbols or
+ * punctuation marks, have word-breaks on both sides.
+ * <P>
+ * Character boundary analysis allows users to interact with
+ * characters as they expect to, for example, when moving the cursor
+ * through a text string. Character boundary analysis provides correct
+ * navigation of through character strings, regardless of how the
+ * character is stored. For example, an accented character might be
+ * stored as a base character and a diacritical mark. What users
+ * consider to be a character can differ between languages.
+ * <P>
+ * This is the interface for all text boundaries.
+ * <P>
+ * Examples:
+ * <P>
+ * Helper function to output text
+ * <pre>
+ * \code
+ * void printTextRange( BreakIterator& iterator, int32_t start, int32_t end )
+ * {
+ * UnicodeString textBuffer, temp;
+ * CharacterIterator *strIter = iterator.createText();
+ * strIter->getText(temp);
+ * cout << " " << start << " " << end << " |"
+ * << temp.extractBetween(start, end, textBuffer)
+ * << "|" << endl;
+ * delete strIter;
+ * }
+ * \endcode
+ * </pre>
+ * Print each element in order:
+ * <pre>
+ * \code
+ * void printEachForward( BreakIterator& boundary)
+ * {
+ * int32_t start = boundary.first();
+ * for (int32_t end = boundary.next();
+ * end != BreakIterator::DONE;
+ * start = end, end = boundary.next())
+ * {
+ * printTextRange( boundary, start, end );
+ * }
+ * }
+ * \endcode
+ * </pre>
+ * Print each element in reverse order:
+ * <pre>
+ * \code
+ * void printEachBackward( BreakIterator& boundary)
+ * {
+ * int32_t end = boundary.last();
+ * for (int32_t start = boundary.previous();
+ * start != BreakIterator::DONE;
+ * end = start, start = boundary.previous())
+ * {
+ * printTextRange( boundary, start, end );
+ * }
+ * }
+ * \endcode
+ * </pre>
+ * Print first element
+ * <pre>
+ * \code
+ * void printFirst(BreakIterator& boundary)
+ * {
+ * int32_t start = boundary.first();
+ * int32_t end = boundary.next();
+ * printTextRange( boundary, start, end );
+ * }
+ * \endcode
+ * </pre>
+ * Print last element
+ * <pre>
+ * \code
+ * void printLast(BreakIterator& boundary)
+ * {
+ * int32_t end = boundary.last();
+ * int32_t start = boundary.previous();
+ * printTextRange( boundary, start, end );
+ * }
+ * \endcode
+ * </pre>
+ * Print the element at a specified position
+ * <pre>
+ * \code
+ * void printAt(BreakIterator &boundary, int32_t pos )
+ * {
+ * int32_t end = boundary.following(pos);
+ * int32_t start = boundary.previous();
+ * printTextRange( boundary, start, end );
+ * }
+ * \endcode
+ * </pre>
+ * Creating and using text boundaries
+ * <pre>
+ * \code
+ * void BreakIterator_Example( void )
+ * {
+ * BreakIterator* boundary;
+ * UnicodeString stringToExamine("Aaa bbb ccc. Ddd eee fff.");
+ * cout << "Examining: " << stringToExamine << endl;
+ *
+ * //print each sentence in forward and reverse order
+ * boundary = BreakIterator::createSentenceInstance( Locale::US );
+ * boundary->setText(stringToExamine);
+ * cout << "----- forward: -----------" << endl;
+ * printEachForward(*boundary);
+ * cout << "----- backward: ----------" << endl;
+ * printEachBackward(*boundary);
+ * delete boundary;
+ *
+ * //print each word in order
+ * boundary = BreakIterator::createWordInstance();
+ * boundary->setText(stringToExamine);
+ * cout << "----- forward: -----------" << endl;
+ * printEachForward(*boundary);
+ * //print first element
+ * cout << "----- first: -------------" << endl;
+ * printFirst(*boundary);
+ * //print last element
+ * cout << "----- last: --------------" << endl;
+ * printLast(*boundary);
+ * //print word at charpos 10
+ * cout << "----- at pos 10: ---------" << endl;
+ * printAt(*boundary, 10 );
+ *
+ * delete boundary;
+ * }
+ * \endcode
+ * </pre>
+ */
+class U_COMMON_API BreakIterator : public UObject {
+public:
+ /**
+ * destructor
+ * @stable ICU 2.0
+ */
+ virtual ~BreakIterator();
+
+ /**
+ * Return true if another object is semantically equal to this
+ * one. The other object should be an instance of the same subclass of
+ * BreakIterator. Objects of different subclasses are considered
+ * unequal.
+ * <P>
+ * Return true if this BreakIterator is at the same position in the
+ * same text, and is the same class and type (word, line, etc.) of
+ * BreakIterator, as the argument. Text is considered the same if
+ * it contains the same characters, it need not be the same
+ * object, and styles are not considered.
+ * @stable ICU 2.0
+ */
+ virtual UBool operator==(const BreakIterator&) const = 0;
+
+ /**
+ * Returns the complement of the result of operator==
+ * @param rhs The BreakIterator to be compared for inequality
+ * @return the complement of the result of operator==
+ * @stable ICU 2.0
+ */
+ UBool operator!=(const BreakIterator& rhs) const { return !operator==(rhs); }
+
+ /**
+ * Return a polymorphic copy of this object. This is an abstract
+ * method which subclasses implement.
+ * @stable ICU 2.0
+ */
+ virtual BreakIterator* clone(void) const = 0;
+
+ /**
+ * Return a polymorphic class ID for this object. Different subclasses
+ * will return distinct unequal values.
+ * @stable ICU 2.0
+ */
+ virtual UClassID getDynamicClassID(void) const = 0;
+
+ /**
+ * Return a CharacterIterator over the text being analyzed.
+ * Changing the state of the returned iterator can have undefined consequences
+ * on the operation of the break iterator. If you need to change it, clone it first.
+ * @stable ICU 2.0
+ */
+ virtual const CharacterIterator& getText(void) const = 0;
+
+
+ /**
+ * Get a UText for the text being analyzed.
+ * The returned UText is a shallow clone of the UText used internally
+ * by the break iterator implementation. It can safely be used to
+ * access the text without impacting any break iterator operations,
+ * but the underlying text itself must not be altered.
+ *
+ * @param fillIn A UText to be filled in. If NULL, a new UText will be
+ * allocated to hold the result.
+ * @param status receives any error codes.
+ * @return The current UText for this break iterator. If an input
+ * UText was provided, it will always be returned.
+ * @draft ICU 3.4
+ */
+ virtual UText *getUText(UText *fillIn, UErrorCode &status) const = 0;
+
+ /**
+ * Change the text over which this operates. The text boundary is
+ * reset to the start.
+ * @param text The UnicodeString used to change the text.
+ * @stable ICU 2.0
+ */
+ virtual void setText(const UnicodeString &text) = 0;
+
+ /**
+ * Reset the break iterator to operate over the text represented by
+ * the UText. The iterator position is reset to the start.
+ *
+ * This function makes a shallow clone of the supplied UText. This means
+ * that the caller is free to immediately close or otherwise reuse the
+ * Utext that was passed as a parameter, but that the underlying text itself
+ * must not be altered while being referenced by the break iterator.
+ *
+ * @param text The UText used to change the text.
+ * @param status receives any error codes.
+ * @draft ICU 3.4
+ */
+ virtual void setText(UText *text, UErrorCode &status) = 0;
+
+ /**
+ * Change the text over which this operates. The text boundary is
+ * reset to the start.
+ * @param it The CharacterIterator used to change the text.
+ * @stable ICU 2.0
+ */
+ virtual void adoptText(CharacterIterator* it) = 0;
+
+ enum {
+ /**
+ * DONE is returned by previous() and next() after all valid
+ * boundaries have been returned.
+ * @stable ICU 2.0
+ */
+ DONE = (int32_t)-1
+ };
+
+ /**
+ * Return the index of the first character in the text being scanned.
+ * @stable ICU 2.0
+ */
+ virtual int32_t first(void) = 0;
+
+ /**
+ * Return the index immediately BEYOND the last character in the text being scanned.
+ * @stable ICU 2.0
+ */
+ virtual int32_t last(void) = 0;
+
+ /**
+ * Return the boundary preceding the current boundary.
+ * @return The character index of the previous text boundary or DONE if all
+ * boundaries have been returned.
+ * @stable ICU 2.0
+ */
+ virtual int32_t previous(void) = 0;
+
+ /**
+ * Return the boundary following the current boundary.
+ * @return The character index of the next text boundary or DONE if all
+ * boundaries have been returned.
+ * @stable ICU 2.0
+ */
+ virtual int32_t next(void) = 0;
+
+ /**
+ * Return character index of the current interator position within the text.
+ * @return The boundary most recently returned.
+ * @stable ICU 2.0
+ */
+ virtual int32_t current(void) const = 0;
+
+ /**
+ * Return the first boundary following the specified offset.
+ * The value returned is always greater than the offset or
+ * the value BreakIterator.DONE
+ * @param offset the offset to begin scanning.
+ * @return The first boundary after the specified offset.
+ * @stable ICU 2.0
+ */
+ virtual int32_t following(int32_t offset) = 0;
+
+ /**
+ * Return the first boundary preceding the specified offset.
+ * The value returned is always smaller than the offset or
+ * the value BreakIterator.DONE
+ * @param offset the offset to begin scanning.
+ * @return The first boundary before the specified offset.
+ * @stable ICU 2.0
+ */
+ virtual int32_t preceding(int32_t offset) = 0;
+
+ /**
+ * Return true if the specfied position is a boundary position.
+ * As a side effect, the current position of the iterator is set
+ * to the first boundary position at or following the specified offset.
+ * @param offset the offset to check.
+ * @return True if "offset" is a boundary position.
+ * @stable ICU 2.0
+ */
+ virtual UBool isBoundary(int32_t offset) = 0;
+
+ /**
+ * Return the nth boundary from the current boundary
+ * @param n which boundary to return. A value of 0
+ * does nothing. Negative values move to previous boundaries
+ * and positive values move to later boundaries.
+ * @return The index of the nth boundary from the current position, or
+ * DONE if there are fewer than |n| boundaries in the specfied direction.
+ * @stable ICU 2.0
+ */
+ virtual int32_t next(int32_t n) = 0;
+
+ /**
+ * Create BreakIterator for word-breaks using the given locale.
+ * Returns an instance of a BreakIterator implementing word breaks.
+ * WordBreak is useful for word selection (ex. double click)
+ * @param where the locale.
+ * @param status the error code
+ * @return A BreakIterator for word-breaks. The UErrorCode& status
+ * parameter is used to return status information to the user.
+ * To check whether the construction succeeded or not, you should check
+ * the value of U_SUCCESS(err). If you wish more detailed information, you
+ * can check for informational error results which still indicate success.
+ * U_USING_FALLBACK_WARNING indicates that a fall back locale was used. For
+ * example, 'de_CH' was requested, but nothing was found there, so 'de' was
+ * used. U_USING_DEFAULT_WARNING indicates that the default locale data was
+ * used; neither the requested locale nor any of its fall back locales
+ * could be found.
+ * The caller owns the returned object and is responsible for deleting it.
+ * @stable ICU 2.0
+ */
+ static BreakIterator* U_EXPORT2
+ createWordInstance(const Locale& where, UErrorCode& status);
+
+ /**
+ * Create BreakIterator for line-breaks using specified locale.
+ * Returns an instance of a BreakIterator implementing line breaks. Line
+ * breaks are logically possible line breaks, actual line breaks are
+ * usually determined based on display width.
+ * LineBreak is useful for word wrapping text.
+ * @param where the locale.
+ * @param status The error code.
+ * @return A BreakIterator for line-breaks. The UErrorCode& status
+ * parameter is used to return status information to the user.
+ * To check whether the construction succeeded or not, you should check
+ * the value of U_SUCCESS(err). If you wish more detailed information, you
+ * can check for informational error results which still indicate success.
+ * U_USING_FALLBACK_WARNING indicates that a fall back locale was used. For
+ * example, 'de_CH' was requested, but nothing was found there, so 'de' was
+ * used. U_USING_DEFAULT_WARNING indicates that the default locale data was
+ * used; neither the requested locale nor any of its fall back locales
+ * could be found.
+ * The caller owns the returned object and is responsible for deleting it.
+ * @stable ICU 2.0
+ */
+ static BreakIterator* U_EXPORT2
+ createLineInstance(const Locale& where, UErrorCode& status);
+
+ /**
+ * Create BreakIterator for character-breaks using specified locale
+ * Returns an instance of a BreakIterator implementing character breaks.
+ * Character breaks are boundaries of combining character sequences.
+ * @param where the locale.
+ * @param status The error code.
+ * @return A BreakIterator for character-breaks. The UErrorCode& status
+ * parameter is used to return status information to the user.
+ * To check whether the construction succeeded or not, you should check
+ * the value of U_SUCCESS(err). If you wish more detailed information, you
+ * can check for informational error results which still indicate success.
+ * U_USING_FALLBACK_WARNING indicates that a fall back locale was used. For
+ * example, 'de_CH' was requested, but nothing was found there, so 'de' was
+ * used. U_USING_DEFAULT_WARNING indicates that the default locale data was
+ * used; neither the requested locale nor any of its fall back locales
+ * could be found.
+ * The caller owns the returned object and is responsible for deleting it.
+ * @stable ICU 2.0
+ */
+ static BreakIterator* U_EXPORT2
+ createCharacterInstance(const Locale& where, UErrorCode& status);
+
+ /**
+ * Create BreakIterator for sentence-breaks using specified locale
+ * Returns an instance of a BreakIterator implementing sentence breaks.
+ * @param where the locale.
+ * @param status The error code.
+ * @return A BreakIterator for sentence-breaks. The UErrorCode& status
+ * parameter is used to return status information to the user.
+ * To check whether the construction succeeded or not, you should check
+ * the value of U_SUCCESS(err). If you wish more detailed information, you
+ * can check for informational error results which still indicate success.
+ * U_USING_FALLBACK_WARNING indicates that a fall back locale was used. For
+ * example, 'de_CH' was requested, but nothing was found there, so 'de' was
+ * used. U_USING_DEFAULT_WARNING indicates that the default locale data was
+ * used; neither the requested locale nor any of its fall back locales
+ * could be found.
+ * The caller owns the returned object and is responsible for deleting it.
+ * @stable ICU 2.0
+ */
+ static BreakIterator* U_EXPORT2
+ createSentenceInstance(const Locale& where, UErrorCode& status);
+
+ /**
+ * Create BreakIterator for title-casing breaks using the specified locale
+ * Returns an instance of a BreakIterator implementing title breaks.
+ * The iterator returned locates title boundaries as described for
+ * Unicode 3.2 only. For Unicode 4.0 and above title boundary iteration,
+ * please use Word Boundary iterator.{@link #createWordInstance }
+ *
+ * @param where the locale.
+ * @param status The error code.
+ * @return A BreakIterator for title-breaks. The UErrorCode& status
+ * parameter is used to return status information to the user.
+ * To check whether the construction succeeded or not, you should check
+ * the value of U_SUCCESS(err). If you wish more detailed information, you
+ * can check for informational error results which still indicate success.
+ * U_USING_FALLBACK_WARNING indicates that a fall back locale was used. For
+ * example, 'de_CH' was requested, but nothing was found there, so 'de' was
+ * used. U_USING_DEFAULT_WARNING indicates that the default locale data was
+ * used; neither the requested locale nor any of its fall back locales
+ * could be found.
+ * The caller owns the returned object and is responsible for deleting it.
+ * @stable ICU 2.1
+ */
+ static BreakIterator* U_EXPORT2
+ createTitleInstance(const Locale& where, UErrorCode& status);
+
+ /**
+ * Get the set of Locales for which TextBoundaries are installed.
+ * <p><b>Note:</b> this will not return locales added through the register
+ * call. To see the registered locales too, use the getAvailableLocales
+ * function that returns a StringEnumeration object </p>
+ * @param count the output parameter of number of elements in the locale list
+ * @return available locales
+ * @stable ICU 2.0
+ */
+ static const Locale* U_EXPORT2 getAvailableLocales(int32_t& count);
+
+ /**
+ * Get name of the object for the desired Locale, in the desired langauge.
+ * @param objectLocale must be from getAvailableLocales.
+ * @param displayLocale specifies the desired locale for output.
+ * @param name the fill-in parameter of the return value
+ * Uses best match.
+ * @return user-displayable name
+ * @stable ICU 2.0
+ */
+ static UnicodeString& U_EXPORT2 getDisplayName(const Locale& objectLocale,
+ const Locale& displayLocale,
+ UnicodeString& name);
+
+ /**
+ * Get name of the object for the desired Locale, in the langauge of the
+ * default locale.
+ * @param objectLocale must be from getMatchingLocales
+ * @param name the fill-in parameter of the return value
+ * @return user-displayable name
+ * @stable ICU 2.0
+ */
+ static UnicodeString& U_EXPORT2 getDisplayName(const Locale& objectLocale,
+ UnicodeString& name);
+
+ /**
+ * Thread safe client-buffer-based cloning operation
+ * Do NOT call delete on a safeclone, since 'new' is not used to create it.
+ * @param stackBuffer user allocated space for the new clone. If NULL new memory will be allocated.
+ * If buffer is not large enough, new memory will be allocated.
+ * @param BufferSize reference to size of allocated space.
+ * If BufferSize == 0, a sufficient size for use in cloning will
+ * be returned ('pre-flighting')
+ * If BufferSize is not enough for a stack-based safe clone,
+ * new memory will be allocated.
+ * @param status to indicate whether the operation went on smoothly or there were errors
+ * An informational status value, U_SAFECLONE_ALLOCATED_ERROR, is used if any allocations were
+ * necessary.
+ * @return pointer to the new clone
+ *
+ * @stable ICU 2.0
+ */
+ virtual BreakIterator * createBufferClone(void *stackBuffer,
+ int32_t &BufferSize,
+ UErrorCode &status) = 0;
+
+ /**
+ * Determine whether the BreakIterator was created in user memory by
+ * createBufferClone(), and thus should not be deleted. Such objects
+ * must be closed by an explicit call to the destructor (not delete).
+ * @stable ICU 2.0
+ */
+ inline UBool isBufferClone(void);
+
+#if !UCONFIG_NO_SERVICE
+ /**
+ * Register a new break iterator of the indicated kind, to use in the given locale.
+ * The break iterator will be adopted. Clones of the iterator will be returned
+ * if a request for a break iterator of the given kind matches or falls back to
+ * this locale.
+ * @param toAdopt the BreakIterator instance to be adopted
+ * @param locale the Locale for which this instance is to be registered
+ * @param kind the type of iterator for which this instance is to be registered
+ * @param status the in/out status code, no special meanings are assigned
+ * @return a registry key that can be used to unregister this instance
+ * @stable ICU 2.4
+ */
+ static URegistryKey U_EXPORT2 registerInstance(BreakIterator* toAdopt,
+ const Locale& locale,
+ UBreakIteratorType kind,
+ UErrorCode& status);
+
+ /**
+ * Unregister a previously-registered BreakIterator using the key returned from the
+ * register call. Key becomes invalid after a successful call and should not be used again.
+ * The BreakIterator corresponding to the key will be deleted.
+ * @param key the registry key returned by a previous call to registerInstance
+ * @param status the in/out status code, no special meanings are assigned
+ * @return TRUE if the iterator for the key was successfully unregistered
+ * @stable ICU 2.4
+ */
+ static UBool U_EXPORT2 unregister(URegistryKey key, UErrorCode& status);
+
+ /**
+ * Return a StringEnumeration over the locales available at the time of the call,
+ * including registered locales.
+ * @return a StringEnumeration over the locales available at the time of the call
+ * @stable ICU 2.4
+ */
+ static StringEnumeration* U_EXPORT2 getAvailableLocales(void);
+#endif
+
+ /**
+ * Returns the locale for this break iterator. Two flavors are available: valid and
+ * actual locale.
+ * @draft ICU 2.8 likely to change after ICU 3.0, based on feedback
+ */
+ Locale getLocale(ULocDataLocaleType type, UErrorCode& status) const;
+
+ /** Get the locale for this break iterator object. You can choose between valid and actual locale.
+ * @param type type of the locale we're looking for (valid or actual)
+ * @param status error code for the operation
+ * @return the locale
+ * @internal
+ */
+ const char *getLocaleID(ULocDataLocaleType type, UErrorCode& status) const;
+
+ private:
+ static BreakIterator* buildInstance(const Locale& loc, const char *type, UBool dict, UErrorCode& status);
+ static BreakIterator* createInstance(const Locale& loc, UBreakIteratorType kind, UErrorCode& status);
+ static BreakIterator* makeInstance(const Locale& loc, int32_t kind, UErrorCode& status);
+
+ friend class ICUBreakIteratorFactory;
+ friend class ICUBreakIteratorService;
+
+protected:
+ /** @internal */
+ BreakIterator();
+ /** @internal */
+ UBool fBufferClone;
+ /** @internal */
+ BreakIterator (const BreakIterator &other) : UObject(other), fBufferClone(FALSE) {}
+
+private:
+
+ /** @internal */
+ char actualLocale[ULOC_FULLNAME_CAPACITY];
+ char validLocale[ULOC_FULLNAME_CAPACITY];
+
+ /**
+ * The assignment operator has no real implementation.
+ * It's provided to make the compiler happy. Do not call.
+ */
+ BreakIterator& operator=(const BreakIterator&);
+};
+
+inline UBool BreakIterator::isBufferClone()
+{
+ return fBufferClone;
+}
+
+U_NAMESPACE_END
+
+#endif /* #if !UCONFIG_NO_BREAK_ITERATION */
+
+#endif // _BRKITER
+//eof
+