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1 // Copyright (c) 2002-2010 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 #ifndef BIDICOMPACT_H_ |
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17 #define BIDICOMPACT_H_ |
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18 |
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19 #include <e32std.h> |
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20 #include <bidi.h> |
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21 |
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22 class TRunInfoCompact |
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23 /** |
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24 Stores information about a run and how to re-order it. |
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25 @internalTechnology |
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26 */ |
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27 { |
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28 public: |
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29 /** Describes text to be re-ordered. |
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30 @internalTechnology */ |
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31 class TReorderingContext |
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32 { |
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33 public: |
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34 /** Where the logical-order text starts. */ |
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35 const TText* iSource; |
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36 /** The start of the line. */ |
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37 TInt iStart; |
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38 /** One past the end of the line. */ |
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39 TInt iEnd; |
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40 /** |
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41 * Truncation character, if there is to be one on this line. Otherwise, |
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42 * 0xFFFF. |
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43 */ |
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44 TChar iTruncation; |
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45 /** ETrue if the line must join at its beginning. */ |
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46 TBool iJoinsAtStart; |
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47 /** ETrue if the line must join at its end. */ |
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48 TBool iJoinsAtEnd; |
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49 }; |
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50 |
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51 /** How to re-order the run. |
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52 @internalTechnology */ |
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53 enum TTypeFlags |
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54 { |
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55 /** Reverse the run, but not surrogate pairs or combining characters. */ |
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56 EFRightToLeft = 0x80000000, |
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57 /** Simply reverse the run, do not check for surrogates or combiners. */ |
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58 EFNoPairsNoCombiners = 0x40000000, |
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59 /** No mirrored characters are present. */ |
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60 EFNoMirroredCharacters = 0x20000000 |
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61 }; |
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62 |
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63 /** Sets up an empty run. |
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64 @internalTechnology */ |
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65 TRunInfoCompact() : iStart(0), iLengthAndType(0) {} |
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66 TRunInfoCompact(TInt aStart, TInt aLength, TBool aReverse, |
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67 const TText* aText); |
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68 TRunInfoCompact(TInt aStart, TInt aLength, TBool aReverse); |
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69 TBool AddRun(const TRunInfoCompact& aToBeAdded); |
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70 TText* Reorder(TText* aDestination, const TReorderingContext& aContext) const; |
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71 |
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72 /** @return The start of this run. |
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73 @internalTechnology */ |
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74 TInt Start() const { return iStart; } |
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75 |
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76 /**@return The length of this run. |
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77 @internalTechnology */ |
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78 TInt Length() const { return static_cast<TInt>(iLengthAndType & 0x0FFFFFFF); } |
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79 |
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80 /** @return The flags associated with this run. |
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81 @internalTechnology */ |
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82 TInt TypeFlags() const { return iLengthAndType & 0xF0000000; } |
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83 |
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84 static TInt Convert(TRunInfoCompact* aBuffer, const TDesC& aText, |
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85 const TBidirectionalState::TRunInfo* aRunArray, TInt aArraySize); |
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86 static TBool JoinBefore(const TText* aText, TInt aIndex); |
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87 private: |
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88 TInt iStart; |
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89 TUint iLengthAndType; |
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90 }; |
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91 |
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92 #endif |
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93 |