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alphaindex.h
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1 // © 2016 and later: Unicode, Inc. and others.
2 // License & terms of use: http://www.unicode.org/copyright.html
3 /*
4 *******************************************************************************
5 *
6 * Copyright (C) 2011-2014 International Business Machines
7 * Corporation and others. All Rights Reserved.
8 *
9 *******************************************************************************
10 */
11
12 #ifndef INDEXCHARS_H
13 #define INDEXCHARS_H
14
15 #include "unicode/utypes.h"
16 #include "unicode/uobject.h"
17 #include "unicode/locid.h"
18 #include "unicode/unistr.h"
19
20 #if !UCONFIG_NO_COLLATION
21
27 U_CDECL_BEGIN
28
35 typedef enum UAlphabeticIndexLabelType {
41 U_ALPHAINDEX_NORMAL = 0,
42
48 U_ALPHAINDEX_UNDERFLOW = 1,
49
58 U_ALPHAINDEX_INFLOW = 2,
59
65 U_ALPHAINDEX_OVERFLOW = 3
66 } UAlphabeticIndexLabelType;
67
68
69 struct UHashtable;
70 U_CDECL_END
71
72 U_NAMESPACE_BEGIN
73
74 // Forward Declarations
75
76 class BucketList;
77 class Collator;
78 class RuleBasedCollator;
79 class StringEnumeration;
80 class UnicodeSet;
81 class UVector;
82
189 class U_I18N_API AlphabeticIndex: public UObject {
190 public:
199 class U_I18N_API Bucket : public UObject {
200 public:
205 virtual ~Bucket();
206
213 const UnicodeString &getLabel() const { return label_; }
220 UAlphabeticIndexLabelType getLabelType() const { return labelType_; }
221
222 private:
223 friend class AlphabeticIndex;
224 friend class BucketList;
225
226 UnicodeString label_;
227 UnicodeString lowerBoundary_;
228 UAlphabeticIndexLabelType labelType_;
229 Bucket *displayBucket_;
230 int32_t displayIndex_;
231 UVector *records_; // Records are owned by the inputList_ vector.
232
233 Bucket(const UnicodeString &label, // Parameter strings are copied.
234 const UnicodeString &lowerBoundary,
235 UAlphabeticIndexLabelType type);
236 };
237
248 class U_I18N_API ImmutableIndex : public UObject {
249 public:
254 virtual ~ImmutableIndex();
255
262 int32_t getBucketCount() const;
263
272 int32_t getBucketIndex(const UnicodeString &name, UErrorCode &errorCode) const;
273
281 const Bucket *getBucket(int32_t index) const;
282
283 private:
284 friend class AlphabeticIndex;
285
286 ImmutableIndex(BucketList *bucketList, Collator *collatorPrimaryOnly)
287 : buckets_(bucketList), collatorPrimaryOnly_(collatorPrimaryOnly) {}
288
289 BucketList *buckets_;
290 Collator *collatorPrimaryOnly_;
291 };
292
305 AlphabeticIndex(const Locale &locale, UErrorCode &status);
306
321 AlphabeticIndex(RuleBasedCollator *collator, UErrorCode &status);
322
333 virtual AlphabeticIndex &addLabels(const UnicodeSet &additions, UErrorCode &status);
334
348 virtual AlphabeticIndex &addLabels(const Locale &locale, UErrorCode &status);
349
354 virtual ~AlphabeticIndex();
355
362 ImmutableIndex *buildImmutableIndex(UErrorCode &errorCode);
363
376 virtual const RuleBasedCollator &getCollator() const;
377
378
387 virtual const UnicodeString &getInflowLabel() const;
388
400 virtual AlphabeticIndex &setInflowLabel(const UnicodeString &inflowLabel, UErrorCode &status);
401
402
410 virtual const UnicodeString &getOverflowLabel() const;
411
412
422 virtual AlphabeticIndex &setOverflowLabel(const UnicodeString &overflowLabel, UErrorCode &status);
423
431 virtual const UnicodeString &getUnderflowLabel() const;
432
442 virtual AlphabeticIndex &setUnderflowLabel(const UnicodeString &underflowLabel, UErrorCode &status);
443
444
452 virtual int32_t getMaxLabelCount() const;
453
466 virtual AlphabeticIndex &setMaxLabelCount(int32_t maxLabelCount, UErrorCode &status);
467
468
485 virtual AlphabeticIndex &addRecord(const UnicodeString &name, const void *data, UErrorCode &status);
486
495 virtual AlphabeticIndex &clearRecords(UErrorCode &status);
496
497
506 virtual int32_t getBucketCount(UErrorCode &status);
507
508
517 virtual int32_t getRecordCount(UErrorCode &status);
518
519
520
533 virtual int32_t getBucketIndex(const UnicodeString &itemName, UErrorCode &status);
534
535
542 virtual int32_t getBucketIndex() const;
543
544
556 virtual UBool nextBucket(UErrorCode &status);
557
566 virtual const UnicodeString &getBucketLabel() const;
567
575 virtual UAlphabeticIndexLabelType getBucketLabelType() const;
576
585 virtual int32_t getBucketRecordCount() const;
586
587
596 virtual AlphabeticIndex &resetBucketIterator(UErrorCode &status);
597
609 virtual UBool nextRecord(UErrorCode &status);
610
619 virtual const UnicodeString &getRecordName() const;
620
621
630 virtual const void *getRecordData() const;
631
632
639 virtual AlphabeticIndex &resetRecordIterator();
640
641 private:
646 AlphabeticIndex(const AlphabeticIndex &other);
647
651 AlphabeticIndex &operator =(const AlphabeticIndex & /*other*/) { return *this;};
652
657 virtual UBool operator==(const AlphabeticIndex& other) const;
658
663 virtual UBool operator!=(const AlphabeticIndex& other) const;
664
665 // Common initialization, for use from all constructors.
666 void init(const Locale *locale, UErrorCode &status);
667
672 void addIndexExemplars(const Locale &locale, UErrorCode &status);
676 UBool addChineseIndexCharacters(UErrorCode &errorCode);
677
678 UVector *firstStringsInScript(UErrorCode &status);
679
680 static UnicodeString separated(const UnicodeString &item);
681
687 void initLabels(UVector &indexCharacters, UErrorCode &errorCode) const;
688 BucketList *createBucketList(UErrorCode &errorCode) const;
689 void initBuckets(UErrorCode &errorCode);
690 void clearBuckets();
691 void internalResetBucketIterator();
692
693 public:
694
695 // The Record is declared public only to allow access from
696 // implementation code written in plain C.
697 // It is not intended for public use.
698
699 #ifndef U_HIDE_INTERNAL_API
700
705 struct Record: public UMemory {
706 const UnicodeString name_;
707 const void *data_;
708 Record(const UnicodeString &name, const void *data);
709 ~Record();
710 };
711 #endif /* U_HIDE_INTERNAL_API */
712
713 private:
714
720 UVector *inputList_;
721
722 int32_t labelsIterIndex_; // Index of next item to return.
723 int32_t itemsIterIndex_;
724 Bucket *currentBucket_; // While an iteration of the index in underway,
725 // point to the bucket for the current label.
726 // NULL when no iteration underway.
727
728 int32_t maxLabelCount_; // Limit on # of labels permitted in the index.
729
730 UnicodeSet *initialLabels_; // Initial (unprocessed) set of Labels. Union
731 // of those explicitly set by the user plus
732 // those from locales. Raw values, before
733 // crunching into bucket labels.
734
735 UVector *firstCharsInScripts_; // The first character from each script,
736 // in collation order.
737
738 RuleBasedCollator *collator_;
739 RuleBasedCollator *collatorPrimaryOnly_;
740
741 // Lazy evaluated: null means that we have not built yet.
742 BucketList *buckets_;
743
744 UnicodeString inflowLabel_;
745 UnicodeString overflowLabel_;
746 UnicodeString underflowLabel_;
747 UnicodeString overflowComparisonString_;
748
749 UnicodeString emptyString_;
750 };
751
752 U_NAMESPACE_END
753
754 #endif // !UCONFIG_NO_COLLATION
755 #endif
icu::Collator
The Collator class performs locale-sensitive string comparison.
Definition: coll.h:165
icu::AlphabeticIndex::Bucket::getLabel
const UnicodeString & getLabel() const
Returns the label string.
Definition: alphaindex.h:213
unistr.h
C++ API: Unicode String.
icu::operator==
U_EXPORT UBool operator==(const StringPiece &x, const StringPiece &y)
Global operator == for StringPiece.
U_ALPHAINDEX_INFLOW
Inflow Label.
Definition: alphaindex.h:58
U_ALPHAINDEX_NORMAL
Normal Label, typically the starting letter of the names in the bucket with this label.
Definition: alphaindex.h:41
U_CDECL_BEGIN
#define U_CDECL_BEGIN
This is used to begin a declaration of a library private ICU C API.
Definition: umachine.h:84
U_I18N_API
#define U_I18N_API
Set to export library symbols from inside the i18n library, and to import them from outside...
Definition: utypes.h:360
icu::AlphabeticIndex::Bucket
An index "bucket" with a label string and type.
Definition: alphaindex.h:199
U_NAMESPACE_BEGIN
#define U_NAMESPACE_BEGIN
This is used to begin a declaration of a public ICU C++ API.
Definition: uversion.h:131
icu::RuleBasedCollator
The RuleBasedCollator class provides the implementation of Collator, using data-driven tables...
Definition: tblcoll.h:113
icu::AlphabeticIndex::ImmutableIndex
Immutable, thread-safe version of AlphabeticIndex.
Definition: alphaindex.h:248
icu::operator!=
UBool operator!=(const StringPiece &x, const StringPiece &y)
Global operator != for StringPiece.
Definition: stringpiece.h:218
icu::UnicodeSet
A mutable set of Unicode characters and multicharacter strings.
Definition: uniset.h:278
icu::AlphabeticIndex::Record
A (name, data) pair, to be sorted by name into one of the index buckets.
Definition: alphaindex.h:705
uobject.h
C++ API: Common ICU base class UObject.
U_CDECL_END
#define U_CDECL_END
This is used to end a declaration of a library private ICU C API.
Definition: umachine.h:85
U_NAMESPACE_END
#define U_NAMESPACE_END
This is used to end a declaration of a public ICU C++ API.
Definition: uversion.h:132
icu::AlphabeticIndex
AlphabeticIndex supports the creation of a UI index appropriate for a given language.
Definition: alphaindex.h:189
UErrorCode
UErrorCode
Error code to replace exception handling, so that the code is compatible with all C++ compilers...
Definition: utypes.h:396
U_ALPHAINDEX_OVERFLOW
Overflow Label.
Definition: alphaindex.h:65
locid.h
C++ API: Locale ID object.
utypes.h
Basic definitions for ICU, for both C and C++ APIs.
icu::UnicodeString
UnicodeString is a string class that stores Unicode characters directly and provides similar function...
Definition: unistr.h:286
icu::AlphabeticIndex::Bucket::getLabelType
UAlphabeticIndexLabelType getLabelType() const
Returns whether this bucket is a normal, underflow, overflow, or inflow bucket.
Definition: alphaindex.h:220
U_ALPHAINDEX_UNDERFLOW
Undeflow Label.
Definition: alphaindex.h:48
icu::UObject
UObject is the common ICU "boilerplate" class.
Definition: uobject.h:223
icu::UMemory
UMemory is the common ICU base class.
Definition: uobject.h:112
UBool
int8_t UBool
The ICU boolean type.
Definition: umachine.h:236
icu::Locale
A Locale object represents a specific geographical, political, or cultural region.
Definition: locid.h:188
UAlphabeticIndexLabelType
UAlphabeticIndexLabelType
Constants for Alphabetic Index Label Types.
Definition: alphaindex.h:35