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1 /* |
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2 * Copyright (c) 2008 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: Implementation of presentation utilities. |
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15 * |
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16 */ |
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17 |
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18 |
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19 // INCLUDE FILES |
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20 #include "emailtrace.h" |
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21 #include "FscPresentationUtils.h" |
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22 |
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23 // From system |
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24 #include <featmgr.h> |
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25 |
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26 /// Namespace for local PresentationUtils definitions |
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27 namespace __RVCT_UNS_FscPresentationUtils { |
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28 |
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29 // LOCAL CONSTANTS |
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30 enum TPanicCode |
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31 { |
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32 EPanicPreCond_CopyAndReplaceChars = 1 |
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33 }; |
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34 |
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35 // ================= LOCAL FUNCTIONS ======================= |
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36 #ifdef _DEBUG |
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37 void Panic(TPanicCode aReason) |
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38 { |
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39 _LIT(KPanicText, "FscPresentationUtils"); |
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40 User::Panic(KPanicText, aReason); |
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41 } |
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42 #endif // _DEBUG |
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43 |
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44 // Zero Width characters |
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45 const TUint KZWSCharacter = 0x200B; |
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46 const TUint KZWNJCharacter = 0x200C; |
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47 const TUint KZWJCharacter = 0x200D; |
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48 |
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49 // ================= LOCAL FUNCTIONS ======================= |
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50 |
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51 /** |
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52 * Check if the given char is a zero width character: |
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53 * Zero Width Space, Zero Width Non-Joiner |
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54 * or Zero Width Joiner character |
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55 * @param aChar Given character |
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56 * @return ETrue if aChar is zero width character. |
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57 * EFalse if aChar is not specified zero width character. |
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58 */ |
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59 inline TBool ZWSCharacter( const TChar aChar ) |
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60 { |
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61 const TChar zwsChar( KZWSCharacter ); |
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62 const TChar zwnjChar( KZWNJCharacter ); |
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63 const TChar zwjChar( KZWJCharacter ); |
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64 return ( aChar == zwsChar ) || ( aChar == zwnjChar ) || |
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65 ( aChar == zwjChar ); |
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66 } |
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67 |
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68 } // __RVCT_UNS_FscPresentationUtils |
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69 |
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70 using namespace __RVCT_UNS_FscPresentationUtils; |
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71 |
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72 |
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73 // ================= MEMBER FUNCTIONS ======================= |
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74 |
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75 // -------------------------------------------------------------------------- |
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76 // FscPresentationUtils::TrimAllAppend |
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77 // -------------------------------------------------------------------------- |
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78 // |
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79 TInt FscPresentationUtils::TrimAllAppend(const TDesC& aText, TDes& aDest) |
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80 { |
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81 FUNC_LOG; |
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82 const TInt oldDestLength = aDest.Length(); |
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83 |
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84 // 1. Find first non space character |
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85 const TInt textLength = aText.Length(); |
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86 TInt firstNonSpaceChar = 0; |
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87 while(firstNonSpaceChar < textLength |
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88 && TChar(aText[firstNonSpaceChar]).IsSpace()) |
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89 { |
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90 ++firstNonSpaceChar; |
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91 } |
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92 |
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93 // 2. Append the source text to destination, |
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94 // not including the leading spaces |
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95 aDest.Append(aText.Mid(firstNonSpaceChar)); |
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96 // 3. Trim the new part of the destination to remove |
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97 // trailing and middle spaces |
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98 TPtr ptr = aDest.MidTPtr(oldDestLength); |
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99 ptr.TrimAll(); |
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100 aDest.SetLength(oldDestLength); |
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101 aDest.Append(ptr); |
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102 |
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103 return aDest.Length() - oldDestLength; |
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104 } |
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105 |
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106 // -------------------------------------------------------------------------- |
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107 // FscPresentationUtils::TrimRightAppend |
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108 // -------------------------------------------------------------------------- |
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109 // |
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110 TInt FscPresentationUtils::TrimRightAppend( |
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111 const TDesC& aText, TDes& aDest) |
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112 { |
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113 FUNC_LOG; |
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114 const TInt oldDestLength = aDest.Length(); |
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115 |
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116 // 1. Find first non space character |
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117 const TInt textLength = aText.Length(); |
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118 TInt firstNonSpaceChar = 0; |
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119 while(firstNonSpaceChar < textLength |
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120 && TChar(aText[firstNonSpaceChar]).IsSpace()) |
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121 { |
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122 ++firstNonSpaceChar; |
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123 } |
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124 |
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125 // 2. Append the source text to destination, |
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126 // not including the leading spaces |
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127 aDest.Append(aText.Mid(firstNonSpaceChar)); |
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128 // 3. Trim the new part of the destination to remove |
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129 // trailing and middle spaces |
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130 TPtr ptr = aDest.MidTPtr(oldDestLength); |
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131 ptr.TrimAll(); |
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132 aDest.SetLength(oldDestLength); |
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133 aDest.Append(ptr); |
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134 // 4. Insert the leading spaces to destination |
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135 aDest.Insert(oldDestLength, aText.Left(firstNonSpaceChar)); |
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136 |
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137 return aDest.Length() - oldDestLength; |
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138 } |
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139 |
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140 // -------------------------------------------------------------------------- |
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141 // FscPresentationUtils::AppendAndReplaceChars |
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142 // -------------------------------------------------------------------------- |
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143 // |
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144 TInt FscPresentationUtils::AppendAndReplaceChars |
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145 (TDes& aDest, const TDesC& aSrc, |
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146 const TDesC& aCharsToReplace, const TDesC& aReplaceChars) |
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147 { |
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148 FUNC_LOG; |
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149 // Check that aDest has enough capacity |
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150 __ASSERT_DEBUG((aDest.MaxLength()-aDest.Length()) >= aSrc.Length(), |
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151 Panic(EPanicPreCond_CopyAndReplaceChars)); |
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152 // Check that a replacament is provided for all characters |
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153 __ASSERT_DEBUG(aCharsToReplace.Length() == aReplaceChars.Length(), |
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154 Panic(EPanicPreCond_CopyAndReplaceChars)); |
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155 |
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156 TInt count, i; |
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157 const TInt sourceLenght = aSrc.Length(); |
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158 for (count=0, i=0; i < sourceLenght; ++i) |
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159 { |
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160 TText ch = aSrc[i]; |
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161 const TInt replacePos = aCharsToReplace.Locate(aSrc[i]); |
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162 if (replacePos != KErrNotFound) |
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163 { |
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164 ++count; |
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165 ch = aReplaceChars[replacePos]; |
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166 } |
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167 aDest.Append(ch); |
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168 } |
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169 |
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170 return count; |
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171 } |
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172 |
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173 // -------------------------------------------------------------------------- |
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174 // FscPresentationUtils::ReplaceNonGraphicCharacters |
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175 // -------------------------------------------------------------------------- |
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176 // |
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177 void FscPresentationUtils::ReplaceNonGraphicCharacters |
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178 (TDes& aText, TText aChar) |
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179 { |
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180 FUNC_LOG; |
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181 const TInt len = aText.Length(); |
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182 for ( TInt i=0; i < len; ++i ) |
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183 { |
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184 if ( !TChar(aText[i]).IsGraph() && |
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185 !ZWSCharacter( aText[i] ) ) |
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186 { |
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187 // If non-graphic char is specified in ZWSCharacter, |
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188 // it will not be replaced. Otherwise replace non-graphic |
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189 // character with aChar. |
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190 aText[i] = aChar; |
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191 } |
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192 } |
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193 } |
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194 |
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195 // -------------------------------------------------------------------------- |
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196 // FscPresentationUtils::AppendWithNewlineTranslationL |
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197 // -------------------------------------------------------------------------- |
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198 // |
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199 void FscPresentationUtils::AppendWithNewlineTranslationL |
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200 ( TDes& aBuffer, const TDesC& aText ) |
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201 { |
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202 FUNC_LOG; |
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203 const TUint16 KCarriageReturn = 0x000d; |
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204 const TUint16 KLineFeed = 0x000a; |
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205 const TUint16 KParagraphSeparator = 0x2029; |
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206 |
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207 const TInt length( aText.Length() ); |
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208 const TInt max( aBuffer.MaxLength() ); |
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209 |
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210 for ( register TInt i = 0; |
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211 (i < length) && (aBuffer.Length() < max); ++i ) |
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212 { |
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213 register TUint16 ch = aText[i]; |
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214 if ( ch == KCarriageReturn ) |
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215 { |
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216 ch = KParagraphSeparator; |
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217 // Skip linefeeds that follow carriage return |
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218 if ( (i < length-1) && (aText[i+1] == KLineFeed) ) |
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219 { |
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220 ++i; |
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221 } |
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222 } |
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223 else if ( ch == KLineFeed ) |
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224 { |
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225 ch = KParagraphSeparator; |
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226 } |
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227 aBuffer.Append( ch ); |
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228 } |
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229 } |
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230 // End of File |
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231 |