tor-browser

selfmt.cpp (5824B)

---

// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
/********************************************************************
* COPYRIGHT:
* Copyright (c) 1997-2012, International Business Machines Corporation and
* others. All Rights Reserved.
* Copyright (C) 2010 , Yahoo! Inc.
********************************************************************
*
* File SELFMT.CPP
*
* Modification History:
*
*   Date        Name        Description
*   11/11/09    kirtig      Finished first cut of implementation.
*   11/16/09    kirtig      Improved version
********************************************************************/

#include "utypeinfo.h"  // for 'typeid' to work

#include "unicode/messagepattern.h"
#include "unicode/rbnf.h"
#include "unicode/selfmt.h"
#include "unicode/uchar.h"
#include "unicode/ucnv_err.h"
#include "unicode/umsg.h"
#include "unicode/ustring.h"
#include "unicode/utypes.h"
#include "cmemory.h"
#include "messageimpl.h"
#include "patternprops.h"
#include "selfmtimpl.h"
#include "uassert.h"
#include "ustrfmt.h"
#include "util.h"
#include "uvector.h"

#if !UCONFIG_NO_FORMATTING

U_NAMESPACE_BEGIN

UOBJECT_DEFINE_RTTI_IMPLEMENTATION(SelectFormat)

static const char16_t SELECT_KEYWORD_OTHER[] = {LOW_O, LOW_T, LOW_H, LOW_E, LOW_R, 0};

SelectFormat::SelectFormat(const UnicodeString& pat,
                          UErrorCode& status) : msgPattern(status) {
  applyPattern(pat, status);
}

SelectFormat::SelectFormat(const SelectFormat& other) : Format(other),
                                                       msgPattern(other.msgPattern) {
}

SelectFormat::~SelectFormat() {
}

void
SelectFormat::applyPattern(const UnicodeString& newPattern, UErrorCode& status) {
   if (U_FAILURE(status)) {
     return;
   }

   msgPattern.parseSelectStyle(newPattern, nullptr, status);
   if (U_FAILURE(status)) {
       msgPattern.clear();
   }
}

UnicodeString&
SelectFormat::format(const Formattable& obj,
                  UnicodeString& appendTo,
                  FieldPosition& pos,
                  UErrorCode& status) const
{
   if (U_FAILURE(status)) {
       return appendTo;
   }
   if (obj.getType() == Formattable::kString) {
       return format(obj.getString(status), appendTo, pos, status);
   } else {
       status = U_ILLEGAL_ARGUMENT_ERROR;
       return appendTo;
   }
}

UnicodeString&
SelectFormat::format(const UnicodeString& keyword,
                    UnicodeString& appendTo,
                    FieldPosition& /*pos */,
                    UErrorCode& status) const {
   if (U_FAILURE(status)) {
       return appendTo;
   }
   // Check for the validity of the keyword
   if (!PatternProps::isIdentifier(keyword.getBuffer(), keyword.length())) {
       status = U_ILLEGAL_ARGUMENT_ERROR;  // Invalid formatting argument.
   }
   if (msgPattern.countParts() == 0) {
       status = U_INVALID_STATE_ERROR;
       return appendTo;
   }
   int32_t msgStart = findSubMessage(msgPattern, 0, keyword, status);
   if (!MessageImpl::jdkAposMode(msgPattern)) {
       int32_t patternStart = msgPattern.getPart(msgStart).getLimit();
       int32_t msgLimit = msgPattern.getLimitPartIndex(msgStart);
       appendTo.append(msgPattern.getPatternString(),
                       patternStart,
                       msgPattern.getPatternIndex(msgLimit) - patternStart);
       return appendTo;
   }
   // JDK compatibility mode: Remove SKIP_SYNTAX.
   return MessageImpl::appendSubMessageWithoutSkipSyntax(msgPattern, msgStart, appendTo);
}

UnicodeString&
SelectFormat::toPattern(UnicodeString& appendTo) {
   if (0 == msgPattern.countParts()) {
       appendTo.setToBogus();
   } else {
       appendTo.append(msgPattern.getPatternString());
   }
   return appendTo;
}


int32_t SelectFormat::findSubMessage(const MessagePattern& pattern, int32_t partIndex,
                                    const UnicodeString& keyword, UErrorCode& ec) {
   if (U_FAILURE(ec)) {
       return 0;
   }
   UnicodeString other(false, SELECT_KEYWORD_OTHER, 5);
   int32_t count = pattern.countParts();
   int32_t msgStart=0;
   // Iterate over (ARG_SELECTOR, message) pairs until ARG_LIMIT or end of select-only pattern.
   do {
       const MessagePattern::Part& part=pattern.getPart(partIndex++);
       const UMessagePatternPartType type=part.getType();
       if(type==UMSGPAT_PART_TYPE_ARG_LIMIT) {
           break;
       }
       // part is an ARG_SELECTOR followed by a message
       if(pattern.partSubstringMatches(part, keyword)) {
           // keyword matches
           return partIndex;
       } else if(msgStart==0 && pattern.partSubstringMatches(part, other)) {
           msgStart=partIndex;
       }
       partIndex=pattern.getLimitPartIndex(partIndex);
   } while(++partIndex<count);
   return msgStart;
}

SelectFormat* SelectFormat::clone() const
{
   return new SelectFormat(*this);
}

SelectFormat&
SelectFormat::operator=(const SelectFormat& other) {
   if (this != &other) {
       msgPattern = other.msgPattern;
   }
   return *this;
}

bool
SelectFormat::operator==(const Format& other) const {
   if (this == &other) {
       return true;
   }
   if (!Format::operator==(other)) {
       return false;
   }
   const SelectFormat& o = static_cast<const SelectFormat&>(other);
   return msgPattern == o.msgPattern;
}

bool
SelectFormat::operator!=(const Format& other) const {
   return  !operator==(other);
}

void
SelectFormat::parseObject(const UnicodeString& /*source*/,
                       Formattable& /*result*/,
                       ParsePosition& pos) const
{
   // Parsing not supported.
   pos.setErrorIndex(pos.getIndex());
}

U_NAMESPACE_END

#endif /* #if !UCONFIG_NO_FORMATTING */

//eof