Index: icu46/source/i18n/titletrn.cpp |
=================================================================== |
--- icu46/source/i18n/titletrn.cpp (revision 0) |
+++ icu46/source/i18n/titletrn.cpp (revision 0) |
@@ -0,0 +1,167 @@ |
+/* |
+********************************************************************** |
+* Copyright (C) 2001-2007, International Business Machines |
+* Corporation and others. All Rights Reserved. |
+********************************************************************** |
+* Date Name Description |
+* 05/24/01 aliu Creation. |
+********************************************************************** |
+*/ |
+ |
+#include "unicode/utypes.h" |
+ |
+#if !UCONFIG_NO_TRANSLITERATION |
+ |
+#include "unicode/uchar.h" |
+#include "unicode/uniset.h" |
+#include "unicode/ustring.h" |
+#include "titletrn.h" |
+#include "umutex.h" |
+#include "ucase.h" |
+#include "cpputils.h" |
+ |
+U_NAMESPACE_BEGIN |
+ |
+UOBJECT_DEFINE_RTTI_IMPLEMENTATION(TitlecaseTransliterator) |
+ |
+TitlecaseTransliterator::TitlecaseTransliterator() : |
+ CaseMapTransliterator(UNICODE_STRING("Any-Title", 9), NULL) |
+{ |
+ // Need to look back 2 characters in the case of "can't" |
+ setMaximumContextLength(2); |
+} |
+ |
+/** |
+ * Destructor. |
+ */ |
+TitlecaseTransliterator::~TitlecaseTransliterator() { |
+} |
+ |
+/** |
+ * Copy constructor. |
+ */ |
+TitlecaseTransliterator::TitlecaseTransliterator(const TitlecaseTransliterator& o) : |
+ CaseMapTransliterator(o) |
+{ |
+} |
+ |
+/** |
+ * Assignment operator. |
+ */ |
+/*TitlecaseTransliterator& TitlecaseTransliterator::operator=( |
+ const TitlecaseTransliterator& o) { |
+ CaseMapTransliterator::operator=(o); |
+ return *this; |
+}*/ |
+ |
+/** |
+ * Transliterator API. |
+ */ |
+Transliterator* TitlecaseTransliterator::clone(void) const { |
+ return new TitlecaseTransliterator(*this); |
+} |
+ |
+/** |
+ * Implements {@link Transliterator#handleTransliterate}. |
+ */ |
+void TitlecaseTransliterator::handleTransliterate( |
+ Replaceable& text, UTransPosition& offsets, |
+ UBool isIncremental) const |
+{ |
+ // TODO reimplement, see ustrcase.c |
+ // using a real word break iterator |
+ // instead of just looking for a transition between cased and uncased characters |
+ // call CaseMapTransliterator::handleTransliterate() for lowercasing? (set fMap) |
+ // needs to take isIncremental into account because case mappings are context-sensitive |
+ // also detect when lowercasing function did not finish because of context |
+ |
+ if (offsets.start >= offsets.limit) { |
+ return; |
+ } |
+ |
+ // case type: >0 cased (UCASE_LOWER etc.) ==0 uncased <0 case-ignorable |
+ int32_t type; |
+ |
+ // Our mode; we are either converting letter toTitle or |
+ // toLower. |
+ UBool doTitle = TRUE; |
+ |
+ // Determine if there is a preceding context of cased case-ignorable*, |
+ // in which case we want to start in toLower mode. If the |
+ // prior context is anything else (including empty) then start |
+ // in toTitle mode. |
+ UChar32 c; |
+ int32_t start; |
+ for (start = offsets.start - 1; start >= offsets.contextStart; start -= U16_LENGTH(c)) { |
+ c = text.char32At(start); |
+ type=ucase_getTypeOrIgnorable(fCsp, c); |
+ if(type>0) { // cased |
+ doTitle=FALSE; |
+ break; |
+ } else if(type==0) { // uncased but not ignorable |
+ break; |
+ } |
+ // else (type<0) case-ignorable: continue |
+ } |
+ |
+ // Convert things after a cased character toLower; things |
+ // after an uncased, non-case-ignorable character toTitle. Case-ignorable |
+ // characters are copied directly and do not change the mode. |
+ UCaseContext csc; |
+ uprv_memset(&csc, 0, sizeof(csc)); |
+ csc.p = &text; |
+ csc.start = offsets.contextStart; |
+ csc.limit = offsets.contextLimit; |
+ |
+ UnicodeString tmp; |
+ const UChar *s; |
+ int32_t textPos, delta, result, locCache=0; |
+ |
+ for(textPos=offsets.start; textPos<offsets.limit;) { |
+ csc.cpStart=textPos; |
+ c=text.char32At(textPos); |
+ csc.cpLimit=textPos+=U16_LENGTH(c); |
+ |
+ type=ucase_getTypeOrIgnorable(fCsp, c); |
+ if(type>=0) { // not case-ignorable |
+ if(doTitle) { |
+ result=ucase_toFullTitle(fCsp, c, utrans_rep_caseContextIterator, &csc, &s, "", &locCache); |
+ } else { |
+ result=ucase_toFullLower(fCsp, c, utrans_rep_caseContextIterator, &csc, &s, "", &locCache); |
+ } |
+ doTitle = (UBool)(type==0); // doTitle=isUncased |
+ |
+ if(csc.b1 && isIncremental) { |
+ // fMap() tried to look beyond the context limit |
+ // wait for more input |
+ offsets.start=csc.cpStart; |
+ return; |
+ } |
+ |
+ if(result>=0) { |
+ // replace the current code point with its full case mapping result |
+ // see UCASE_MAX_STRING_LENGTH |
+ if(result<=UCASE_MAX_STRING_LENGTH) { |
+ // string s[result] |
+ tmp.setTo(FALSE, s, result); |
+ delta=result-U16_LENGTH(c); |
+ } else { |
+ // single code point |
+ tmp.setTo(result); |
+ delta=tmp.length()-U16_LENGTH(c); |
+ } |
+ text.handleReplaceBetween(csc.cpStart, textPos, tmp); |
+ if(delta!=0) { |
+ textPos+=delta; |
+ csc.limit=offsets.contextLimit+=delta; |
+ offsets.limit+=delta; |
+ } |
+ } |
+ } |
+ } |
+ offsets.start=textPos; |
+} |
+ |
+U_NAMESPACE_END |
+ |
+#endif /* #if !UCONFIG_NO_TRANSLITERATION */ |
Property changes on: icu46/source/i18n/titletrn.cpp |
___________________________________________________________________ |
Added: svn:eol-style |
+ LF |