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1 // Copyright (c) 1997-2009 Nokia Corporation and/or its subsidiary(-ies). |
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2 // All rights reserved. |
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3 // This component and the accompanying materials are made available |
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4 // under the terms of "Eclipse Public License v1.0" |
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5 // which accompanies this distribution, and is available |
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6 // at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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7 // |
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8 // Initial Contributors: |
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9 // Nokia Corporation - initial contribution. |
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10 // |
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11 // Contributors: |
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12 // |
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13 // Description: |
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14 // |
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15 |
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16 |
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17 |
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18 #include <conarc.h> |
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19 #include <s32file.h> |
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20 #include <e32std.h> |
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21 #include <e32uid.h> |
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22 |
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23 #include "TXCONV.H" |
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24 |
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25 // |
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26 // class CEtToTxtCnv |
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27 // |
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28 |
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29 CEtToTxtCnv::~CEtToTxtCnv() |
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30 { |
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31 delete iTextTranFromEra; |
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32 } |
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33 |
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34 void CEtToTxtCnv::ConvertObjectAL(RReadStream& aReadStream, RWriteStream& aWriteStream,MConverterUiObserver* /*aObserver*/) |
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35 { |
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36 iReadStream = &aReadStream; |
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37 iPos=0; |
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38 iLength=aReadStream.Source()->SizeL(); |
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39 delete iTextTranFromEra; |
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40 iTextTranFromEra=NULL; |
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41 iTextTranFromEra=TTextTranFromEra::NewL(CPlainText::EOrganiseByParagraph, aWriteStream,0); |
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42 } |
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43 |
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44 const TInt KBufSize=256; |
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45 |
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46 TBool CEtToTxtCnv::DoConvertL() |
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47 { |
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48 __ASSERT_DEBUG(iTextTranFromEra, User::Invariant()); |
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49 TBuf<KBufSize> buf; |
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50 TInt read = Min(iLength - iPos, KBufSize); |
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51 #if defined _UNICODE |
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52 TBuf8<KBufSize> buf8; |
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53 iReadStream->ReadL(buf8, read); |
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54 for(TInt i = 0; i < (buf8.Size() - 1); i += 2) |
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55 { |
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56 buf.Append(buf8[i] | (buf8[i + 1] << 8)); |
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57 } |
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58 #else |
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59 iReadStream->ReadL(buf,read); |
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60 #endif |
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61 iPos += read; |
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62 iTextTranFromEra->Initialise(buf); |
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63 return iTextTranFromEra->DoTranslateL(); |
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64 } |
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65 |
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66 |
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67 TUid CEtToTxtCnv::Uid() |
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68 { |
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69 return KUidEtextToText; |
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70 } |
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71 |
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72 TInt CEtToTxtCnv::Capabilities() |
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73 { |
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74 return EConvertsObjects; |
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75 } |
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76 |
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77 CEtToTxtCnv::CEtToTxtCnv() |
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78 {} |
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79 |
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80 // |
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81 // class CTxtToEtCnv |
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82 // |
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83 |
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84 CTxtToEtCnv::~CTxtToEtCnv() |
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85 { |
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86 delete iTextTranToEra; |
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87 } |
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88 |
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89 void CTxtToEtCnv::ConvertObjectAL(RReadStream& aReadStream, RWriteStream& aWriteStream, MConverterUiObserver* /*aObserver*/) |
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90 { |
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91 iReadStream = &aReadStream; |
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92 iWriteStream = &aWriteStream; |
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93 iLength=iReadStream->Source()->SizeL(); |
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94 iPos=0; |
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95 delete iTextTranToEra; |
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96 iTextTranToEra=NULL; |
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97 iTextTranToEra=new(ELeave) TTextTranToEra(CPlainText::EOrganiseByParagraph, iNoTrim); |
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98 } |
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99 |
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100 TBool CTxtToEtCnv::DoConvertL() |
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101 { |
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102 __ASSERT_DEBUG(iTextTranToEra, User::Invariant()); |
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103 TBuf<KBufSize> buf; |
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104 TInt read = Min(iLength - iPos, KBufSize); |
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105 #if defined _UNICODE |
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106 TBuf8<KBufSize> buf8; |
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107 iReadStream->ReadL(buf8, read); |
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108 TInt i = 0; |
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109 for(; i < (buf8.Size() - 1); i += 2) |
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110 { |
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111 buf.Append(buf8[i] | (buf8[i + 1] << 8)); |
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112 } |
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113 #else |
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114 iReadStream->ReadL(buf, read); |
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115 #endif |
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116 iPos += read; |
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117 iTextTranToEra->Translate(buf); |
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118 #if defined _UNICODE |
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119 buf8.Zero(); |
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120 for (i = 0; i < buf.Length(); i++) |
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121 { |
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122 buf8.Append(buf[i] & 0x00FF); |
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123 buf8.Append((buf[i] >> 8) & 0x00FF); |
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124 } |
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125 iWriteStream->WriteL(buf8); |
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126 #else |
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127 iWriteStream->WriteL(buf); |
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128 #endif |
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129 if (iPos < iLength) |
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130 return ETrue; // more to do |
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131 return EFalse; |
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132 } |
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133 |
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134 TUid CTxtToEtCnv::Uid() |
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135 { |
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136 return KUidTextToEtext; |
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137 } |
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138 |
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139 TInt CTxtToEtCnv::Capabilities() |
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140 { |
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141 return EConvertsObjects; |
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142 } |
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143 |
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144 CTxtToEtCnv::CTxtToEtCnv() |
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145 {} |
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146 CTxtToEtCnv::CTxtToEtCnv(TBool aNoTrim) : iNoTrim(aNoTrim) |
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147 {} |
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148 |
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149 TTextTran::TTextTran(CPlainText::TTextOrganisation aTextOrganisation) |
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150 // C'tor |
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151 // |
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152 : iTransMode(aTextOrganisation) |
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153 {} |
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154 |
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155 |
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156 void TTextTran::SetTranslationMode(CPlainText::TTextOrganisation aTextOrganisation) |
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157 // |
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158 {iTransMode=aTextOrganisation;} |
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159 |
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160 |
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161 CPlainText::TTextOrganisation TTextTran::TranslationMode()const |
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162 // |
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163 {return iTransMode;} |
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164 |
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165 |
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166 TTextTranToEra::TTextTranToEra(CPlainText::TTextOrganisation aTextOrganisation, TBool aNoTrim) |
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167 // C'tor |
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168 // |
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169 : TTextTran(aTextOrganisation) |
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170 { |
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171 iNoTrim=aNoTrim; |
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172 } |
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173 |
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174 |
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175 void TTextTranToEra::Translate(TDes& aBuf) |
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176 // Scans the passed buffer, replacing line delimiters with paragraph delimiters |
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177 // based on the translation mode that has been set. (Paragraph or line). |
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178 // Control characters in the source, that have meaning to ERA text are translated |
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179 // into 'blobs'. |
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180 // The descriptor aBuf will never be enlarged, only made smaller! |
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181 // |
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182 // Unicode specifies discontinuous control code regions.!!! |
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183 { |
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184 |
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185 iReadPtr=CONST_CAST(TText*,aBuf.Ptr()); |
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186 iWritePtr=CONST_CAST(TText*,iReadPtr); |
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187 const TText* basePtr=iReadPtr; |
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188 const TInt length=aBuf.Length(); |
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189 while (iReadPtr<basePtr+length) |
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190 { |
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191 // __ASSERT_DEBUG(iReadPtr>=iWritePtr,Panic(EDebug)); |
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192 if (*iReadPtr<0x20) |
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193 MapControlCode(); // This is a control character |
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194 else |
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195 { |
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196 *iWritePtr=*iReadPtr; |
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197 iWritePtr++; |
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198 } |
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199 iReadPtr++; |
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200 } |
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201 aBuf.SetLength(iWritePtr-basePtr); |
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202 } |
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203 |
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204 |
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205 void TTextTranToEra::MapControlCode() |
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206 // Translate any control codes encountered into something more reasonable. |
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207 // CR's are ignored completely, only LF's influence where paragraph delimiters occur. |
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208 // |
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209 { |
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210 switch (*iReadPtr) |
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211 { |
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212 case 0x0c: // FF |
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213 *iWritePtr=CEditableText::EPageBreak; |
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214 break; |
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215 case 0x09: // CEditableText::ETabCharacter |
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216 *iWritePtr=*iReadPtr; |
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217 break; // No translation required |
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218 case 0x0d: // CR - ignore this character. |
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219 iWritePtr--; // cos its incremented again outside the switch. |
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220 break; |
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221 case 0x0a: // LF |
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222 { |
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223 if (iTransMode==CPlainText::EOrganiseByParagraph) |
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224 { |
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225 if(!iNoTrim) |
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226 { |
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227 Trim(); // trims trailng white space preceeding this line delimter. |
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228 } |
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229 *iWritePtr=CEditableText::EParagraphDelimiter; // all line delimiters become paragraph delimiters |
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230 } |
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231 else |
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232 {// only consecutive line delimiters become paragraph delimiters |
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233 if (*(iReadPtr+1)==0x0a || (*(iReadPtr+1)==0x0d && *(iReadPtr+2)==0x0a)) |
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234 { |
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235 Trim(); // trims trailng white space preceeding this line delimter. |
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236 *iWritePtr=CEditableText::EParagraphDelimiter; // Insert paragraph |
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237 iReadPtr+=(*(iReadPtr+1)==0x0a) ? 1 : 2; // consume this delimiter set. |
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238 } |
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239 else |
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240 *iWritePtr=0x20; // replace with white space. |
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241 } |
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242 break; |
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243 } |
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244 default: |
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245 // CEditableText::EParagraphDelimiter |
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246 // CEditableText::ELineBreak |
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247 // CEditableText::EPageBreak |
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248 // CEditableText::ENonBreakingTab |
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249 // CEditableText::ENonBreakingHyphen |
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250 // CEditableText::EPotentialHyphen |
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251 // CEditableText::ENonBreakingSpace |
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252 // CEditableText::EPictureCharacter |
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253 *iWritePtr=*iReadPtr; |
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254 break; |
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255 } |
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256 iWritePtr++; |
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257 } |
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258 |
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259 |
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260 void TTextTranToEra::Trim() |
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261 // Removes white space that has already been written before the line delimiter was encountered. |
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262 // |
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263 { |
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264 while (*(iWritePtr-1)==0x20) |
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265 iWritePtr--; |
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266 } |
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267 |
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268 |
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269 TTextTranFromEra* TTextTranFromEra::NewL(CPlainText::TTextOrganisation aTextOrganisation,RWriteStream& aOutStream,TInt aLineWrap) |
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270 // Create & initialise a new instance of this class. |
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271 // |
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272 { |
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273 TTextTranFromEra* self=new(ELeave) TTextTranFromEra(aTextOrganisation,aOutStream,aLineWrap); |
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274 CleanupStack::PushL(self); |
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275 self->ConstructL(); |
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276 CleanupStack::Pop(); |
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277 return self; |
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278 } |
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279 |
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280 |
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281 TTextTranFromEra::TTextTranFromEra(CPlainText::TTextOrganisation aTextOrganisation,RWriteStream& aOutStream,TInt aLineWrap) |
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282 // C'tor |
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283 // |
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284 : TTextTran(aTextOrganisation),iOutStream(aOutStream),iLineWrap(aLineWrap) |
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285 |
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286 { |
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287 ResetExportBuffer(); |
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288 if (aTextOrganisation==CPlainText::EOrganiseByParagraph) |
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289 iLineWrap=KMaxTInt; |
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290 } |
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291 |
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292 |
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293 void TTextTranFromEra::ConstructL() |
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294 // Initialise this object. |
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295 // |
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296 {} |
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297 |
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298 |
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299 TInt TTextTranFromEra::DoTranslateL() |
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300 // Scans the passed buffer, replacing paragraph delimiters with line delimiters (CR/LF) |
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301 // based on the translation mode that has been set. (Paragraph or line). |
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302 // Special characters in the source, that have meaning to ERA text are translated. |
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303 // |
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304 { |
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305 if(iReadPtr<iSBase+iSLen) |
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306 { |
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307 while (iReadPtr<(iSBase+iSLen)) |
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308 { |
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309 DoTranslateSourceBufferL(); // returns when export buffer is full or aBuf is empty |
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310 CommitExportBufferToFileL(); // export buffer full |
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311 } |
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312 return ETrue; |
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313 } |
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314 CommitExportBufferToFileL(); |
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315 return EFalse; |
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316 } |
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317 |
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318 |
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319 void TTextTranFromEra::NotifyEndOfSourceL() |
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320 // Flush the export buffer. |
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321 // |
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322 {CommitExportBufferToFileL();} |
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323 |
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324 |
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325 void TTextTranFromEra::Initialise(const TDesC& aBuf) |
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326 // |
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327 { |
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328 iReadPtr=CONST_CAST(TText*,aBuf.Ptr()); |
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329 iSBase=iReadPtr; |
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330 iSLen=aBuf.Length(); |
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331 } |
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332 |
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333 |
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334 void TTextTranFromEra::ResetExportBuffer() |
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335 // |
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336 { |
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337 iWritePtr=CONST_CAST(TText*,iExportBuffer.Ptr()); |
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338 iTBase=iWritePtr; |
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339 } |
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340 |
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341 void TTextTranFromEra::CommitExportBufferToFileL() |
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342 // |
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343 { |
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344 iExportBuffer.SetLength(iWritePtr - iTBase); |
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345 #if !defined(_UNICODE) |
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346 iOutStream.WriteL(iExportBuffer); |
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347 #else // Write wide descriptor to file as byte stream |
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348 TBuf8<KMaxExportBuffer> narrowBuffer; |
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349 TInt i = 0; |
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350 for (; i < (iExportBuffer.Length() / 2); i++) |
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351 { |
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352 narrowBuffer.Append(iExportBuffer[i] & 0x00FF); |
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353 narrowBuffer.Append((iExportBuffer[i] >> 8) & 0x00FF); |
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354 } |
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355 iOutStream.WriteL(narrowBuffer); |
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356 narrowBuffer.Zero(); |
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357 for (i = (iExportBuffer.Length() / 2); i < iExportBuffer.Length(); i++) |
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358 { |
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359 narrowBuffer.Append(iExportBuffer[i] & 0x00FF); |
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360 narrowBuffer.Append((iExportBuffer[i] >> 8) & 0x00FF); |
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361 } |
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362 iOutStream.WriteL(narrowBuffer); |
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363 #endif |
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364 iExportBuffer.SetLength(0); |
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365 iWritePtr = iTBase; // Reset the write pointer - fundamental !!!! |
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366 } |
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367 |
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368 |
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369 void TTextTranFromEra::DoTranslateSourceBufferL() |
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370 // Translate the source buffer, writing to the export buffer. |
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371 // Returns when either the source has been consumed or the export buffer is full |
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372 // |
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373 { |
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374 while (iReadPtr<iSBase+iSLen && iWritePtr<iTBase+KMaxExportBuffer-2*KLineDelimiterLength) |
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375 { |
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376 if ((*iReadPtr<0x20) || (*iReadPtr==CEditableText::EParagraphDelimiter)) |
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377 MapEraCodeL(); // May fill export buffer |
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378 else |
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379 { |
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380 *iWritePtr=*iReadPtr; |
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381 iWritePtr++; |
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382 } |
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383 if (iLineWrap!=KMaxTInt && iWritePtr>=iTBase+iLineWrap) |
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384 { |
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385 TText* ptr=iWritePtr; |
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386 TText* end=iWritePtr; |
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387 TText chr(0); |
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388 while ((*(--ptr))!=' ' && ptr>iTBase) //Allow for more general breaking character |
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389 {} |
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390 if (*ptr!=' ') |
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391 { |
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392 WriteCRLF(KLineDelimiterLength); |
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393 ptr=end; //So the while below is not executed |
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394 } |
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395 else |
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396 { |
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397 *ptr++=KCharacterCR; |
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398 chr=*ptr; |
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399 *ptr++=KCharacterLF; |
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400 iWritePtr=ptr; |
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401 } |
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402 CommitExportBufferToFileL(); |
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403 if (ptr<=end) |
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404 { |
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405 *(iWritePtr++)=chr; |
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406 while (ptr<end) |
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407 { |
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408 *(iWritePtr++)=*(ptr++); |
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409 } |
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410 } |
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411 } |
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412 iReadPtr++; |
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413 } |
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414 } |
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415 |
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416 |
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417 void TTextTranFromEra::MapEraCodeL() |
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418 // |
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419 { |
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420 switch (*iReadPtr) |
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421 { |
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422 case CEditableText::EPictureCharacter: |
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423 case CEditableText::ELineBreak: |
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424 case CEditableText::EPageBreak: |
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425 case CEditableText::EPotentialHyphen: |
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426 return; // These characters are not emitted. |
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427 case CEditableText::ETabCharacter: |
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428 *iWritePtr=KCharacterTab; |
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429 break; |
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430 case CEditableText::ENonBreakingHyphen: |
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431 *iWritePtr=KCharacterHyphen; |
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432 break; |
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433 case CEditableText::ENonBreakingSpace: |
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434 *iWritePtr=KCharacterSpace; |
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435 break; |
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436 case CEditableText::EParagraphDelimiter: |
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437 { |
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438 TInt charsToWrite=KLineDelimiterLength; |
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439 if (iTransMode==CPlainText::EOrganiseByLine) |
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440 charsToWrite=2*KLineDelimiterLength; |
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441 WriteCRLF(charsToWrite); |
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442 if (iTransMode==CPlainText::EOrganiseByLine) |
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443 CommitExportBufferToFileL(); // export buffer |
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444 return; |
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445 } |
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446 default: |
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447 *iWritePtr=*iReadPtr; |
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448 break; |
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449 } |
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450 iWritePtr++; |
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451 } |
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452 |
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453 |
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454 void TTextTranFromEra::WriteCRLF(TInt aNumCharacters) |
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455 // |
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456 { |
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457 while (aNumCharacters>0) |
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458 { |
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459 if (aNumCharacters%2==1) |
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460 *iWritePtr=KCharacterLF; |
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461 else |
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462 *iWritePtr=KCharacterCR; |
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463 aNumCharacters--; |
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464 iWritePtr++; |
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465 } |
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466 } |
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467 |