1 /* |
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2 * Copyright (c) 2002 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: |
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15 * |
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16 */ |
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17 |
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28 |
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29 #ifndef _AKNFEP_INLINE_TEXT_DECORATOR_H__ |
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30 #define _AKNFEP_INLINE_TEXT_DECORATOR_H__ |
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31 |
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32 #include <e32base.h> |
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33 |
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34 class CAknFepInlineTextDecorator : public CBase |
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35 { |
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36 public: |
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37 enum |
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38 { |
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39 ELeftToRightMark = 0x200E, // LRM |
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40 ERightToLeftMark = 0x200F // RLM |
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41 }; |
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42 private: |
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43 enum |
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44 { |
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45 ENullChar = 0, |
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46 ESingleCharacter = 1, |
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47 ETwoCharacters = 2 |
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48 }; |
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49 |
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50 public: |
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51 /** |
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52 * Applies required markup to a piece of bidirectional text to ensure correct |
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53 * rendering for Averell |
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54 * |
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55 * @param aInlineText original inline text |
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56 * @param aDecoratedText descriptor which will hold the original text plus |
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57 * any decoration |
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58 * @param aPositionOfInsertionPointInInlineText position of insertion point |
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59 * (cursor) in the original inline text |
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60 * @param aPreviousCharacter the character immediately prior to the inline |
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61 * text |
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62 * @param aRTLParagraph set to true if the inline text is being inserted into |
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63 * a paragraph with RTL directionality in the CParaFormat |
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64 * @param aInputDirectionIsRtl is to be set to ETrue if the current input direction is RTL |
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65 */ |
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66 void DecorateInlineText( |
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67 const TDesC& aInlineText, |
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68 TDes& aDecoratedText, |
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69 TInt& aPositionOfInsertionPointInInlineText, |
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70 TChar aPreviousCharacter, |
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71 TBool aRTLParagraph, |
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72 TBool aInputDirectionIsRTL); |
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73 |
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74 /** |
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75 * Resolves any decorated text + any surrounding text that has been added to the beginning |
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76 * or end to remove unnecessary directional markers. |
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77 * |
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78 * @param aDecoratedTextPlusSurroundings descriptor to hold a piece of text to be parsed |
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79 * and resolved; new text, optionally with accreted surrounding text |
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80 * @param aDecoratedTextSpan span of text originally inspected and decorated (must be subset of descriptor) |
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81 * |
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82 * @return EFalse if and only if no change was made to aDecoratedTextPlusSurroundings |
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83 */ |
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84 TBool ResolveDecoratedText( |
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85 TDes& aDecoratedTextPlusSurroundings, |
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86 TCursorSelection aDecoratedTextSpan); |
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87 |
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88 /** |
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89 * Determines if a character is an LRM (0x200e) or an RLM (0x200f) |
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90 * |
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91 * @param aChar the character to be inspected |
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92 * @return ETrue if the character has the value 0x200e or 0x200f |
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93 */ |
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94 TBool CharacterIsDirectionalMarker(TChar aChar); |
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95 |
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96 /** |
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97 * Determines if a character has strong LTR directionality |
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98 * |
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99 * @param aChar the character to be inspected |
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100 * @return ETrue if the character has bidi category of TChar::ELeftToRight |
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101 * or is an LRM |
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102 */ |
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103 TBool CharacterIsStrongLeftToRight(TChar aChar); |
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104 |
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105 /** |
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106 * Determines if a character has strong RTL directionality |
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107 * |
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108 * @param aChar the character to be inspected |
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109 * @return ETrue if the character has bidi category of TChar::ERightToLeft |
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110 * or is an RLM |
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111 */ |
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112 TBool CharacterIsStrongRightToLeft(TChar aChar); |
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113 |
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114 /** |
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115 * Determines if two characters share the same strong directionality |
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116 * |
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117 * @param aCh1 the first character to be compared |
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118 * @param aCh2 the second character to be compared |
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119 * @return ETrue if aCh1 and aCh2 share the same strong directionality |
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120 */ |
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121 TBool CharactersHaveSameStrongDirection(TChar aCh1, TChar aCh2); |
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122 |
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123 /** |
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124 * Determines if a character has weak directionality |
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125 * |
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126 * @param aChar the character to be inspected |
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127 * @return ETrue if the character has any of the following bidi categories |
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128 * TChar::EEuropeanNumber |
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129 * TChar::EEuropeanNumberSeparator |
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130 * TChar::EEuropeanNumberTerminator |
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131 * TChar::EArabicNumber |
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132 * TChar::ECommonNumberSeparator |
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133 */ |
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134 TBool CharacterIsWeaklyDirectional(TChar aChar); |
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135 |
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136 /** |
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137 * Determines if a character is a separator character |
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138 * |
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139 * @param aChar the character to be inspected |
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140 * @return ETrue if the character has any of the following bidi categories |
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141 * TChar::EParagraphSeparator |
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142 * TChar::ESegmentSeparator |
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143 */ |
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144 TBool CharacterIsSeparator(TChar aChar); |
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145 |
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146 /** |
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147 * Determines if a character has neutral directionlaity |
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148 * |
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149 * @param aChar the character to be inspected |
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150 * @return ETrue if the character has any of the following bidi categories |
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151 * TChar::EWhitespace |
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152 * TChar::EOtherNeutral |
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153 */ |
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154 TBool CharacterIsNeutral(TChar aChar); |
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155 |
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156 private: |
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157 void DecorateNeutralCharacters( |
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158 const TDesC& aInlineText, |
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159 TDes& aDecoratedText, |
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160 TInt& aPositionOfInsertionPointInInlineText, |
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161 TChar aPreviousCharacter, |
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162 TBool aRTLParagraph, |
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163 TBool aInputDirectionIsRTL); |
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164 }; |
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165 |
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166 #endif |
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