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Unified Diff: source/i18n/unicode/filteredbrk.h

Issue 845603002: Update ICU to 54.1 step 1 (Closed) Base URL: https://chromium.googlesource.com/chromium/deps/icu.git@master
Patch Set: remove unusued directories Created 5 years, 11 months ago
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Index: source/i18n/unicode/filteredbrk.h
diff --git a/source/i18n/unicode/filteredbrk.h b/source/i18n/unicode/filteredbrk.h
new file mode 100644
index 0000000000000000000000000000000000000000..1412418be50bbaa4c5a642f78f5fd07b1b4d6dfe
--- /dev/null
+++ b/source/i18n/unicode/filteredbrk.h
@@ -0,0 +1,131 @@
+/*
+********************************************************************************
+* Copyright (C) 1997-2014, International Business Machines
+* Corporation and others. All Rights Reserved.
+********************************************************************************
+*/
+
+#ifndef FILTEREDBRK_H
+#define FILTEREDBRK_H
+
+#include "unicode/utypes.h"
+#include "unicode/brkiter.h"
+
+#if !UCONFIG_NO_BREAK_ITERATION && !UCONFIG_NO_FILTERED_BREAK_ITERATION
+#ifndef U_HIDE_INTERNAL_API
+
+U_NAMESPACE_BEGIN
+
+/**
+ * \file
+ * \brief C++ API: FilteredBreakIteratorBuilder
+ */
+
+/**
+ * The BreakIteratorFilter is used to modify the behavior of a BreakIterator
+ * by constructing a new BreakIterator which suppresses certain segment boundaries.
+ * See http://www.unicode.org/reports/tr35/tr35-general.html#Segmentation_Exceptions .
+ * For example, a typical English Sentence Break Iterator would break on the space
+ * in the string "Mr. Smith" (resulting in two segments),
+ * but with "Mr." as an exception, a filtered break iterator
+ * would consider the string "Mr. Smith" to be a single segment.
+ *
+ * <p><b>Note:</b> An instance of {@link BreakIterator} returned by this builder
+ * class currently does not support following operations in this technology preview
+ * version:
+ * <ul>
+ * <li>{@link BreakIterator#next(int32_t) next(int32_t n)}</li>
+ * <li>{@link BreakIterator#previous(void) previous(void)}</li>
+ * <li>{@link BreakIterator#following(int32_t) following(int32_t offset)}</li>
+ * <li>{@link BreakIterator#preceding(int32_t) preceding(int32_t offset)}</li>
+ * </ul>
+ * When one of above methods is called, BreakIterator.DONE will be returned immediately
+ * without updating the internal state.
+ *
+ * @internal technology preview
+ */
+class U_I18N_API FilteredBreakIteratorBuilder : public UObject {
+ public:
+ /**
+ * destructor.
+ * @internal technology preview
+ */
+ virtual ~FilteredBreakIteratorBuilder();
+
+ /**
+ * Construct a FilteredBreakIteratorBuilder based on rules in a locale.
+ * The rules are taken from CLDR exception data for the locale,
+ * see http://www.unicode.org/reports/tr35/tr35-general.html#Segmentation_Exceptions
+ * This is the equivalent of calling createInstance(UErrorCode&)
+ * and then repeatedly calling addNoBreakAfter(...) with the contents
+ * of the CLDR exception data.
+ * @param where the locale.
+ * @param status The error code.
+ * @return the new builder
+ * @internal technology preview
+ */
+ static FilteredBreakIteratorBuilder *createInstance(const Locale& where, UErrorCode& status);
+
+ /**
+ * Construct an empty FilteredBreakIteratorBuilder.
+ * In this state, it will not suppress any segment boundaries.
+ * @param status The error code.
+ * @return the new builder
+ * @internal technology preview
+ */
+ static FilteredBreakIteratorBuilder *createInstance(UErrorCode &status);
+
+ /**
+ * Suppress a certain string from being the end of a segment.
+ * For example, suppressing "Mr.", then segments ending in "Mr." will not be returned
+ * by the iterator.
+ * @param string the string to suppress, such as "Mr."
+ * @param status error code
+ * @return returns TRUE if the string was not present and now added,
+ * FALSE if the call was a no-op because the string was already being suppressed.
+ * @internal technology preview
+ */
+ virtual UBool suppressBreakAfter(const UnicodeString& string, UErrorCode& status) = 0;
+
+ /**
+ * Stop suppressing a certain string from being the end of the segment.
+ * This function does not create any new segment boundaries, but only serves to un-do
+ * the effect of earlier calls to suppressBreakAfter, or to un-do the effect of
+ * locale data which may be suppressing certain strings.
+ * @param exception the exception to remove
+ * @param status error code
+ * @return returns TRUE if the string was present and now removed,
+ * FALSE if the call was a no-op because the string was not being suppressed.
+ * @internal technology preview
+ */
+ virtual UBool unsuppressBreakAfter(const UnicodeString& string, UErrorCode& status) = 0;
+
+ /**
+ * Wrap (adopt) an existing break iterator in a new filtered instance.
+ * The resulting BreakIterator is owned by the caller.
+ * The BreakIteratorFilter may be destroyed before the BreakIterator is destroyed.
+ * Note that the adoptBreakIterator is adopted by the new BreakIterator
+ * and should no longer be used by the caller.
+ * The FilteredBreakIteratorBuilder may be reused.
+ * @param adoptBreakIterator the break iterator to adopt
+ * @param status error code
+ * @return the new BreakIterator, owned by the caller.
+ * @internal technology preview
+ */
+ virtual BreakIterator *build(BreakIterator* adoptBreakIterator, UErrorCode& status) = 0;
+
+ protected:
+ /**
+ * For subclass use
+ * @internal technology preview
+ */
+ FilteredBreakIteratorBuilder();
+};
+
+
+U_NAMESPACE_END
+
+#endif /* U_HIDE_INTERNAL_API */
+#endif // #if !UCONFIG_NO_BREAK_ITERATION && !UCONFIG_NO_FILTERED_BREAK_ITERATION
+
+#endif // #ifndef FILTEREDBRK_H
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