tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
Log | Files | Refs | README | LICENSE

remtrans.cpp (2477B)

      1 // © 2016 and later: Unicode, Inc. and others.
      2 // License & terms of use: http://www.unicode.org/copyright.html
      3 /*
      4 **********************************************************************
      5 *   Copyright (c) 2001-2011, International Business Machines
      6 *   Corporation and others.  All Rights Reserved.
      7 **********************************************************************
      8 *   Date        Name        Description
      9 *   04/02/2001  aliu        Creation.
     10 **********************************************************************
     11 */
     12 
     13 #include "unicode/utypes.h"
     14 
     15 #if !UCONFIG_NO_TRANSLITERATION
     16 
     17 #include "remtrans.h"
     18 #include "unicode/unifilt.h"
     19 
     20 static const char16_t CURR_ID[] = {65, 110, 121, 45, 0x52, 0x65, 0x6D, 0x6F, 0x76, 0x65, 0x00}; /* "Any-Remove" */
     21 
     22 U_NAMESPACE_BEGIN
     23 
     24 UOBJECT_DEFINE_RTTI_IMPLEMENTATION(RemoveTransliterator)
     25 
     26 /**
     27 * Factory method
     28 */
     29 static Transliterator* RemoveTransliterator_create(const UnicodeString& /*ID*/,
     30                                                   Transliterator::Token /*context*/) {
     31    /* We don't need the ID or context. We just remove data */
     32    return new RemoveTransliterator();
     33 }
     34 
     35 /**
     36 * System registration hook.
     37 */
     38 void RemoveTransliterator::registerIDs() {
     39 
     40    Transliterator::_registerFactory(UnicodeString(true, ::CURR_ID, -1),
     41                                     RemoveTransliterator_create, integerToken(0));
     42 
     43    Transliterator::_registerSpecialInverse(UNICODE_STRING_SIMPLE("Remove"),
     44                                            UNICODE_STRING_SIMPLE("Null"), false);
     45 }
     46 
     47 RemoveTransliterator::RemoveTransliterator() : Transliterator(UnicodeString(true, ::CURR_ID, -1), nullptr) {}
     48 
     49 RemoveTransliterator::~RemoveTransliterator() {}
     50 
     51 RemoveTransliterator* RemoveTransliterator::clone() const {
     52    RemoveTransliterator* result = new RemoveTransliterator();
     53    if (result != nullptr && getFilter() != nullptr) {
     54        result->adoptFilter(getFilter()->clone());
     55    }
     56    return result;
     57 }
     58 
     59 void RemoveTransliterator::handleTransliterate(Replaceable& text, UTransPosition& index,
     60                                               UBool /*isIncremental*/) const {
     61    // Our caller (filteredTransliterate) has already narrowed us
     62    // to an unfiltered run.  Delete it.
     63    UnicodeString empty;
     64    text.handleReplaceBetween(index.start, index.limit, empty);
     65    int32_t len = index.limit - index.start;
     66    index.contextLimit -= len;
     67    index.limit -= len;
     68 }
     69 U_NAMESPACE_END
     70 
     71 #endif /* #if !UCONFIG_NO_TRANSLITERATION */