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+// Copyright (C) 2016 and later: Unicode, Inc. and others.
+// License & terms of use: http://www.unicode.org/copyright.html
+/*
+**********************************************************************
+* Copyright (c) 2002-2011, International Business Machines Corporation
+* and others. All Rights Reserved.
+**********************************************************************
+* Date Name Description
+* 01/21/2002 aliu Creation.
+**********************************************************************
+*/
+
+#ifndef STRREPL_H
+#define STRREPL_H
+
+#include "unicode/utypes.h"
+
+#if !UCONFIG_NO_TRANSLITERATION
+
+#include "unicode/unifunct.h"
+#include "unicode/unirepl.h"
+#include "unicode/unistr.h"
+
+U_NAMESPACE_BEGIN
+
+class TransliterationRuleData;
+
+/**
+ * A replacer that produces static text as its output. The text may
+ * contain transliterator stand-in characters that represent nested
+ * UnicodeReplacer objects, making it possible to encode a tree of
+ * replacers in a StringReplacer. A StringReplacer that contains such
+ * stand-ins is called a <em>complex</em> StringReplacer. A complex
+ * StringReplacer has a slower processing loop than a non-complex one.
+ * @author Alan Liu
+ */
+class StringReplacer : public UnicodeFunctor, public UnicodeReplacer {
+
+ private:
+
+ /**
+ * Output text, possibly containing stand-in characters that
+ * represent nested UnicodeReplacers.
+ */
+ UnicodeString output;
+
+ /**
+ * Cursor position. Value is ignored if hasCursor is false.
+ */
+ int32_t cursorPos;
+
+ /**
+ * True if this object outputs a cursor position.
+ */
+ UBool hasCursor;
+
+ /**
+ * A complex object contains nested replacers and requires more
+ * complex processing. StringReplacers are initially assumed to
+ * be complex. If no nested replacers are seen during processing,
+ * then isComplex is set to false, and future replacements are
+ * short circuited for better performance.
+ */
+ UBool isComplex;
+
+ /**
+ * Object that translates stand-in characters in 'output' to
+ * UnicodeReplacer objects.
+ */
+ const TransliterationRuleData* data;
+
+ public:
+
+ /**
+ * Construct a StringReplacer that sets the emits the given output
+ * text and sets the cursor to the given position.
+ * @param theOutput text that will replace input text when the
+ * replace() method is called. May contain stand-in characters
+ * that represent nested replacers.
+ * @param theCursorPos cursor position that will be returned by
+ * the replace() method
+ * @param theData transliterator context object that translates
+ * stand-in characters to UnicodeReplacer objects
+ */
+ StringReplacer(const UnicodeString& theOutput,
+ int32_t theCursorPos,
+ const TransliterationRuleData* theData);
+
+ /**
+ * Construct a StringReplacer that sets the emits the given output
+ * text and does not modify the cursor.
+ * @param theOutput text that will replace input text when the
+ * replace() method is called. May contain stand-in characters
+ * that represent nested replacers.
+ * @param theData transliterator context object that translates
+ * stand-in characters to UnicodeReplacer objects
+ */
+ StringReplacer(const UnicodeString& theOutput,
+ const TransliterationRuleData* theData);
+
+ /**
+ * Copy constructor.
+ */
+ StringReplacer(const StringReplacer& other);
+
+ /**
+ * Destructor
+ */
+ virtual ~StringReplacer();
+
+ /**
+ * Implement UnicodeFunctor
+ */
+ virtual UnicodeFunctor* clone() const;
+
+ /**
+ * UnicodeFunctor API. Cast 'this' to a UnicodeReplacer* pointer
+ * and return the pointer.
+ */
+ virtual UnicodeReplacer* toReplacer() const;
+
+ /**
+ * UnicodeReplacer API
+ */
+ virtual int32_t replace(Replaceable& text,
+ int32_t start,
+ int32_t limit,
+ int32_t& cursor);
+
+ /**
+ * UnicodeReplacer API
+ */
+ virtual UnicodeString& toReplacerPattern(UnicodeString& result,
+ UBool escapeUnprintable) const;
+
+ /**
+ * Implement UnicodeReplacer
+ */
+ virtual void addReplacementSetTo(UnicodeSet& toUnionTo) const;
+
+ /**
+ * UnicodeFunctor API
+ */
+ virtual void setData(const TransliterationRuleData*);
+
+ /**
+ * ICU "poor man's RTTI", returns a UClassID for this class.
+ */
+ static UClassID U_EXPORT2 getStaticClassID();
+
+ /**
+ * ICU "poor man's RTTI", returns a UClassID for the actual class.
+ */
+ virtual UClassID getDynamicClassID() const;
+};
+
+U_NAMESPACE_END
+
+#endif /* #if !UCONFIG_NO_TRANSLITERATION */
+
+#endif
+
+//eof