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1 /* |
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2 * Copyright (c) 2002-2005 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: Class for handling area searching for landmarks. |
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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 |
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20 #include <lbs.h> |
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21 #include <EPos_CPosLmAreaCriteria.h> |
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22 #include <epos_landmarkdatabasestructure.h> |
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23 #include "EPos_CPosLmLocalAreaSearch.h" |
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24 #include "EPos_PosLmSqlQueryHelper.h" |
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25 #include "epos_cposlmnameindexiterator.h" |
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26 |
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27 const TInt KLmIdColumn = 1; |
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28 |
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29 // ============================ MEMBER FUNCTIONS =============================== |
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30 |
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31 // ----------------------------------------------------------------------------- |
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32 // ----------------------------------------------------------------------------- |
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33 // |
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34 CPosLmLocalAreaSearch::CPosLmLocalAreaSearch( |
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35 CPosLmLocalDatabase& aDatabase, |
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36 const CPosLmSearchCriteria& aCriteria, |
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37 const TPosLmLocalSortPref& aSortPref, |
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38 TInt aMaxNumOfMatches) |
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39 : CPosLmLocalSearchHandler( |
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40 aDatabase, aCriteria.CriteriaType(), aSortPref, aMaxNumOfMatches ), |
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41 iSearchStatus( ESearchNotStarted ) |
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42 { |
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43 } |
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44 |
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45 // ----------------------------------------------------------------------------- |
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46 // ----------------------------------------------------------------------------- |
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47 // |
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48 void CPosLmLocalAreaSearch::ConstructL( |
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49 const CPosLmSearchCriteria& aCriteria, |
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50 CPosLmDisplayData* aDisplayData) |
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51 { |
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52 const CPosLmAreaCriteria& criteria = |
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53 static_cast<const CPosLmAreaCriteria&>( aCriteria ); |
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54 |
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55 criteria.GetSearchArea( iSouth, iNorth, iWest, iEast ); |
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56 |
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57 if ( aDisplayData ) |
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58 { |
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59 SetDisplayDataL( aDisplayData ); |
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60 } |
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61 } |
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62 |
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63 // ----------------------------------------------------------------------------- |
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64 // ----------------------------------------------------------------------------- |
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65 // |
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66 CPosLmLocalAreaSearch* CPosLmLocalAreaSearch::NewL( |
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67 CPosLmLocalDatabase& aDatabase, |
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68 const CPosLmSearchCriteria& aCriteria, |
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69 const TPosLmLocalSortPref& aSortPref, |
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70 CPosLmDisplayData* aDisplayData, |
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71 TInt aMaxNumOfMatches) |
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72 { |
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73 CPosLmLocalAreaSearch* self = new (ELeave) CPosLmLocalAreaSearch( |
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74 aDatabase, aCriteria, aSortPref, aMaxNumOfMatches); |
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75 CleanupStack::PushL(self); |
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76 self->ConstructL(aCriteria, aDisplayData); |
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77 CleanupStack::Pop(self); |
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78 return self; |
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79 } |
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80 |
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81 // ----------------------------------------------------------------------------- |
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82 // ----------------------------------------------------------------------------- |
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83 // |
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84 CPosLmLocalAreaSearch::~CPosLmLocalAreaSearch() |
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85 { |
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86 } |
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87 |
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88 // ----------------------------------------------------------------------------- |
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89 // ----------------------------------------------------------------------------- |
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90 // |
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91 TBool CPosLmLocalAreaSearch::IsValidForLandmarkSearch() const |
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92 { |
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93 return ETrue; |
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94 } |
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95 |
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96 // ----------------------------------------------------------------------------- |
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97 // ----------------------------------------------------------------------------- |
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98 // |
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99 TInt CPosLmLocalAreaSearch::NextStepL( TReal32& aProgress ) |
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100 { |
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101 if ( iSearchStatus == ESearchNotStarted ) |
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102 { |
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103 PrepareSearchL(); |
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104 } |
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105 |
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106 switch ( iSearchStatus ) |
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107 { |
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108 case EPrepareUnsortedSearch: |
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109 case EUnsortedSearch: |
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110 UnsortedSearchL(); |
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111 break; |
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112 case EPrepareSortedSearch: |
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113 case ESortedSearch: |
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114 SortedSearchL(); |
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115 break; |
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116 default: |
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117 iSearchStatus = ESearchCompleted; |
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118 break; |
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119 } |
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120 |
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121 return SearchStepCompletedL( iSearchStatus == ESearchCompleted, aProgress ); |
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122 } |
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123 |
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124 // ----------------------------------------------------------------------------- |
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125 // ----------------------------------------------------------------------------- |
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126 // |
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127 void CPosLmLocalAreaSearch::PrepareSearchL() |
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128 { |
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129 TInt numRowsInTable = GetRowCountL( KPosLmLandmarkTable ); |
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130 |
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131 if ( numRowsInTable == 0 ) |
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132 { |
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133 iSearchStatus = ESearchCompleted; |
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134 } |
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135 else |
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136 { |
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137 PrepareCalculateProgress( numRowsInTable ); |
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138 if ( SortPref().SortType() == TPosLmLocalSortPref::ELandmarkSorting ) |
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139 { |
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140 iSearchStatus = EPrepareSortedSearch; |
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141 } |
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142 else |
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143 { |
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144 iSearchStatus = EPrepareUnsortedSearch; |
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145 } |
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146 } |
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147 } |
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148 |
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149 // ----------------------------------------------------------------------------- |
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150 // ----------------------------------------------------------------------------- |
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151 // |
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152 void CPosLmLocalAreaSearch::PrepareQueryL( TBool aFullData ) |
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153 { |
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154 HBufC* query = HBufC::NewLC( KPosLmSqlStatementMaxLen ); |
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155 if ( aFullData ) |
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156 { |
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157 query->Des().Format( KPosLmSqlSelect, &KPosLmSqlAll, &KPosLmLandmarkTable ); |
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158 } |
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159 else |
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160 { |
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161 query->Des().Format( KPosLmSqlSelect, &KPosLmLandmarkIdCol, &KPosLmLandmarkTable ); |
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162 } |
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163 |
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164 PosLmSqlQueryHelper::AppendAreaCriteriaToQueryL( |
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165 query, iSouth, iNorth, iWest, iEast ); |
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166 |
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167 PrepareViewL( iView, *query ); |
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168 CleanupStack::PopAndDestroy( query ); |
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169 } |
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170 |
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171 // ----------------------------------------------------------------------------- |
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172 // ----------------------------------------------------------------------------- |
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173 // |
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174 void CPosLmLocalAreaSearch::UnsortedSearchL() |
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175 { |
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176 if ( iSearchStatus == EPrepareUnsortedSearch ) |
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177 { |
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178 PrepareQueryL( HasDisplayData() ); |
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179 iSearchStatus = EUnsortedSearch; |
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180 } |
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181 |
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182 if ( iSearchStatus == EUnsortedSearch ) |
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183 { |
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184 if ( SearchViewL( iView, KLmIdColumn ) || IsMaxMatchesFound() ) |
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185 { |
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186 iSearchStatus = ESearchCompleted; |
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187 } |
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188 } |
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189 } |
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190 |
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191 // ----------------------------------------------------------------------------- |
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192 // ----------------------------------------------------------------------------- |
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193 // |
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194 void CPosLmLocalAreaSearch::SortedSearchL() |
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195 { |
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196 if ( iSearchStatus == EPrepareSortedSearch ) |
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197 { |
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198 PrepareLandmarkIndexL(); |
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199 iSearchStatus = ESortedSearch; |
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200 } |
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201 |
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202 if ( iSearchStatus == ESortedSearch ) |
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203 { |
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204 EvaluateLandmarkIndexL(); |
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205 TInt ddMatches = DisplayDataCount(); |
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206 while ( !iLandmarkIndex->AtEnd() && !IsMaxMatchesFound() && !BreakOnDisplayData( ddMatches ) ) |
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207 { |
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208 const RPosLmLocalNameIndex::CIndexItem& item = iLandmarkIndex->Current(); |
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209 if ( GetLandmarkRowL( item.Id() ) && CurrentRowMatch( iTable ) ) |
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210 { |
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211 AddMatchL( item.Id(), &iTable ); |
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212 } |
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213 iLandmarkIndex->Next(); |
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214 } |
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215 |
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216 if ( !MoreInLandmarkIndex() || IsMaxMatchesFound() ) |
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217 { |
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218 iSearchStatus = ESearchCompleted; |
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219 } |
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220 } |
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221 } |
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222 |
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223 //------------------------------------------------------------- |
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224 //------------------------------------------------------------- |
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225 // |
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226 TBool CPosLmLocalAreaSearch::CurrentRowMatch( RDbRowSet& aView ) |
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227 { |
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228 if ( !aView.IsColNull( EPosLmLcLatitudeCol ) && |
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229 !aView.IsColNull( EPosLmLcLongitudeCol ) ) |
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230 { |
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231 TRealX nan; |
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232 nan.SetNaN(); |
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233 TReal lat = nan, lon = nan; |
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234 |
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235 lat = aView.ColReal( EPosLmLcLatitudeCol ); |
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236 lon = aView.ColReal( EPosLmLcLongitudeCol ); |
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237 |
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238 if ( !Math::IsNaN( lat ) && !Math::IsNaN( lon ) ) |
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239 { |
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240 if ( ( lat >= iSouth ) && ( lat <= iNorth ) ) |
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241 { |
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242 if ( iWest <= iEast ) |
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243 { |
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244 return ( lon >= iWest ) && ( lon <= iEast ); |
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245 } |
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246 else // cross 180 meridian |
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247 { |
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248 return ( lon >= iWest ) || ( lon <= iEast ); |
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249 } |
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250 } |
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251 } |
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252 } |
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253 return EFalse; |
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254 } |