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1 /* |
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2 * Copyright (c) 2002-2007 Nokia Corporation and/or its subsidiary(-ies). |
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3 * All rights reserved. |
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4 * This component and the accompanying materials are made available |
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5 * under the terms of "Eclipse Public License v1.0" |
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6 * which accompanies this distribution, and is available |
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7 * at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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8 * |
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9 * Initial Contributors: |
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10 * Nokia Corporation - initial contribution. |
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11 * |
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12 * Contributors: |
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13 * |
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14 * Description: A class for converts characters into SMS 7 bit format and |
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15 * decides if the data is too long. |
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16 * |
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17 */ |
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18 |
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19 |
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20 #include "CPsu2CharConv.h" |
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21 |
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22 // System includes |
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23 |
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24 // Debug headers |
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25 #include <Pbk2Debug.h> |
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26 |
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27 /// Unnamed namespace for local definitions |
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28 namespace { |
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29 |
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30 const TInt KMaxSizeOfConvertedChar = 5; |
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31 const TInt KReductionSize = 3; |
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32 const TInt KOneCharacter = 1; |
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33 const TInt KTwoBytes = 2; |
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34 _LIT( KAtSign, "@" ); |
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35 const TInt KLineSeparator( 0x2028 ); |
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36 const TInt KParagraphSeparator( 0x2029 ); |
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37 |
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38 } // namespace |
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39 |
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40 // ----------------------------------------------------------------------------- |
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41 // CPsu2CharConv::CPsu2CharConv |
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42 // C++ default constructor can NOT contain any code, that |
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43 // might leave. |
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44 // ----------------------------------------------------------------------------- |
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45 // |
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46 CPsu2CharConv::CPsu2CharConv( RFs& aFs, const TUint aCharacterSet ) : |
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47 iFs( aFs ), |
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48 iCharacterSetIdentifier( aCharacterSet ) |
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49 { |
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50 } |
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51 |
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52 // ----------------------------------------------------------------------------- |
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53 // CPsu2CharConv::ConstructL |
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54 // Symbian 2nd phase constructor can leave. |
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55 // ----------------------------------------------------------------------------- |
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56 // |
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57 void CPsu2CharConv::ConstructL() |
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58 { |
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59 iConverter = CCnvCharacterSetConverter::NewL(); |
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60 iConverter->PrepareToConvertToOrFromL( |
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61 iCharacterSetIdentifier, |
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62 iFs ); |
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63 } |
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64 |
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65 void CPsu2CharConv::SetDownGradeLf( CCnvCharacterSetConverter:: |
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66 TDowngradeForExoticLineTerminatingCharacters aDowngrade ) |
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67 { |
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68 iConverter->SetDowngradeForExoticLineTerminatingCharacters( aDowngrade ); |
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69 } |
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70 |
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71 // ----------------------------------------------------------------------------- |
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72 // CPsu2CharConv::NewL |
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73 // Two-phased constructor. |
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74 // ----------------------------------------------------------------------------- |
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75 // |
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76 CPsu2CharConv* CPsu2CharConv::NewL( RFs& aFs, const TUint aChacterSet ) |
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77 { |
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78 CPsu2CharConv* self = NewLC( aFs, aChacterSet ); |
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79 CleanupStack::Pop( self ); |
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80 return self; |
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81 } |
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82 |
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83 // ----------------------------------------------------------------------------- |
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84 // CPsu2CharConv::NewLC |
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85 // Two-phased constructor. |
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86 // ----------------------------------------------------------------------------- |
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87 // |
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88 CPsu2CharConv* CPsu2CharConv::NewLC( RFs& aFs, const TUint aChacterSet ) |
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89 { |
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90 CPsu2CharConv* self = new( ELeave ) CPsu2CharConv( aFs, aChacterSet ); |
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91 CleanupStack::PushL( self ); |
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92 self->ConstructL(); |
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93 return self; |
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94 } |
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95 |
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96 // ----------------------------------------------------------------------------- |
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97 // ~CPsu2CharConv |
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98 // ----------------------------------------------------------------------------- |
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99 // |
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100 CPsu2CharConv::~CPsu2CharConv() |
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101 { |
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102 delete iConverter; |
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103 } |
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104 |
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105 // ----------------------------------------------------------------------------- |
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106 // CPsu2CharConv::CheckFieldValidityL |
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107 // ----------------------------------------------------------------------------- |
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108 // |
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109 TPtrC CPsu2CharConv::CheckFieldValidityL( |
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110 const TDesC& aData, |
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111 TInt aMaxLength, |
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112 TPsu2FieldValidity& aValidity ) |
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113 { |
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114 TPtrC result( aData ); |
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115 aValidity = EOk; |
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116 |
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117 TBuf8<KMaxSizeOfConvertedChar> convBuf; |
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118 TInt unConv = 0; |
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119 TInt simLength = 0; |
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120 TInt maxUiLength = 0; |
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121 TInt uiLength = aData.Length(); |
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122 TBool hasConvertedChar = EFalse; |
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123 |
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124 // Make the conversion one character at a time |
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125 for ( TInt i = 0; i < uiLength; ++i ) |
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126 { |
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127 convBuf.Zero(); |
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128 TPtrC ch( aData.Mid( i, KOneCharacter ) ); |
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129 User::LeaveIfError( |
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130 iConverter->ConvertFromUnicode( convBuf, ch, unConv ) ); |
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131 |
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132 if ( unConv > 0 ) |
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133 { |
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134 // If the character can't be converted it's unicode, |
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135 // in that case it's assumed that all characters take two bytes as |
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136 // in UCS2 coding scheme 1 |
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137 simLength = uiLength * KTwoBytes; |
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138 maxUiLength = aMaxLength / KTwoBytes; |
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139 } |
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140 else |
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141 { |
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142 // Character was converted. If the converted character |
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143 // differs from original, it requires more space from SIM. |
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144 // Make the reduction only once, since it appears not matter |
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145 // how many funny characters there are. |
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146 if ( !hasConvertedChar ) |
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147 { |
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148 TBuf16<KMaxSizeOfConvertedChar> convBuf16; |
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149 convBuf16.Copy( convBuf ); |
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150 if ( ch.Compare( convBuf16 ) != 0 && ch.Compare( KAtSign ) != 0 ) |
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151 { |
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152 // SIM max.length is decreased once by 3 chars, if special |
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153 // char is other than @. This kind of behaviour seems to |
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154 // be in all SIMs with different name field sizes. |
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155 aMaxLength -= KReductionSize; |
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156 hasConvertedChar = ETrue; |
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157 } |
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158 } |
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159 simLength += convBuf.Length(); |
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160 maxUiLength = i; |
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161 } |
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162 |
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163 if ( simLength > aMaxLength ) |
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164 { |
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165 // If length is too long no need to continue checking |
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166 aValidity = ETooLong; |
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167 result.Set( aData.Left( maxUiLength ) ); |
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168 break; |
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169 } |
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170 } |
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171 |
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172 return result; |
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173 } |
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174 |
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175 // ----------------------------------------------------------------------------- |
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176 // CPsu2CharConv::CheckFieldLengthL |
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177 // ----------------------------------------------------------------------------- |
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178 // |
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179 TPtrC CPsu2CharConv::CheckFieldLengthL( |
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180 const TDesC& aData, |
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181 TInt aMaxLength, |
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182 TInt& aUnconvertedCount ) |
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183 { |
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184 TPtrC result( aData ); |
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185 HBufC8* convertedData = HBufC8::NewLC( aData.Length() * KMaxSizeOfConvertedChar ); |
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186 TPtr8 convertedDataPtr = convertedData->Des(); |
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187 |
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188 // Start with full length data and remove one character on each iteration |
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189 for( TInt i( aData.Length() ); i > 0; i-- ) |
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190 { |
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191 TPtrC convertableData( aData.Left( i ) ); |
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192 convertedDataPtr.Zero(); |
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193 |
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194 User::LeaveIfError( |
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195 iConverter->ConvertFromUnicode( |
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196 convertedDataPtr, convertableData, aUnconvertedCount ) ); |
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197 TInt convertedLength = convertedDataPtr.Length(); |
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198 |
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199 // Check if any extra space needs to be reserved (there is some |
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200 // differences in special character conversions between Symbian |
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201 // character converter and SAT) |
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202 ReviseLength( convertableData, convertedLength ); |
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203 |
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204 // Check if the conversion will fit to the space available |
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205 if( convertedLength <= aMaxLength ) |
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206 { |
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207 PBK2_DEBUG_PRINT( PBK2_DEBUG_STRING |
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208 ("CPsu2CharConv::CheckFieldLengthL passed, max len: %i"), i ); |
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209 // Maximum allowed data length found, no need to continue |
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210 result.Set( convertableData ); |
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211 break; |
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212 } |
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213 } |
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214 |
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215 CleanupStack::PopAndDestroy( convertedData ); |
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216 return result; |
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217 } |
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218 |
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219 // ----------------------------------------------------------------------------- |
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220 // CPsu2CharConv::ReviseMaxLength |
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221 // Checks some special cases to need if extra space needs to be reserved for |
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222 // the data when saving to (U)SIM. |
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223 // ----------------------------------------------------------------------------- |
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224 // |
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225 void CPsu2CharConv::ReviseLength( |
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226 const TDesC& aData, TInt& aConvertedLength ) |
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227 { |
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228 // Check if the data contains unicode line/paragraph separator(s). |
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229 // If it does it will require some extra space when saved to (U)SIM. |
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230 for( TInt i(0); i < aData.Length(); i++ ) |
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231 { |
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232 if( aData[i] == KLineSeparator || aData[i] == KParagraphSeparator ) |
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233 { |
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234 PBK2_DEBUG_PRINT( PBK2_DEBUG_STRING |
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235 ("CPsu2CharConv::CheckFieldLengthL separator found" ) ); |
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236 const TInt KParagraphSeparatorExtraSpace(3); |
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237 aConvertedLength += KParagraphSeparatorExtraSpace; |
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238 // Search no more, reserve more space only once |
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239 break; |
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240 } |
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241 } |
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242 } |
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243 |
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244 // ----------------------------------------------------------------------------- |
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245 // CPsu2CharConv::IsUnicodeL |
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246 // |
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247 // ----------------------------------------------------------------------------- |
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248 // |
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249 TBool CPsu2CharConv::IsUnicodeL( const TDesC& aText ) |
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250 { |
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251 TBool isUnicode( EFalse ); |
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252 TInt unconvertedCount(0); |
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253 HBufC8* convertedText = HBufC8::NewLC( aText.Length() ); |
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254 TPtr8 convertedTextPtr = convertedText->Des(); |
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255 |
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256 iConverter->ConvertFromUnicode( convertedTextPtr, aText, unconvertedCount ); |
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257 |
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258 // If any characters were not converted or if the converted text is longer |
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259 // than the original the text must be unicode |
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260 if( unconvertedCount > 0 || |
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261 aText.Length() < convertedText->Length() ) |
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262 { |
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263 isUnicode = ETrue; |
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264 } |
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265 |
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266 CleanupStack::PopAndDestroy( convertedText ); |
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267 return isUnicode; |
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268 } |
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269 |
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270 // End of File |