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1 /* |
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2 * Copyright (c) 2007 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 the License "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 LIW Iterable wrapper |
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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 <config.h> |
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21 #include <lookup.h> |
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22 #include <LiwServiceHandler.h> |
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23 #include "DeviceLiwIterable.h" |
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24 #include "DeviceLiwBinding.h" |
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25 |
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26 const TInt KMaxKeySize = 128; |
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27 |
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28 using namespace KJS; |
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29 |
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30 const ClassInfo DeviceLiwIterable::info = { "DeviceLiwIterable", 0, 0, 0 }; |
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31 const TInt INIT_JSOBJ_ARRAY_SIZE = 10; // initial jsobject array |
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32 // ============================= LOCAL FUNCTIONS =============================== |
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33 /* |
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34 @begin DeviceLiwIterableTable 1 |
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35 getNext DeviceLiwIterable::getNext DontDelete|Function 0 |
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36 reset DeviceLiwIterable::reset DontDelete|Function 0 |
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37 close DeviceLiwIterable::close DontDelete|Function 0 |
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38 @end |
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39 */ |
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40 |
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41 /* |
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42 * The DeviceLiwIterable is a plain wrapper around the underlying LIW iterable variant |
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43 * object. It acts as a pass through for the iterable methods to JS. This |
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44 * is needed for efficiently processing returned iterables (instead of copying the |
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45 * contents into a JS array). Of course much of the benefit depends on how well iterables |
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46 * are implemented in the underlying LIW framework. |
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47 */ |
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48 |
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49 // ============================ MEMBER FUNCTIONS =============================== |
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50 |
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51 |
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52 // ---------------------------------------------------------------------------- |
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53 // DeviceLiwIterable::DeviceLiwIterable |
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54 // |
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55 // ---------------------------------------------------------------------------- |
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56 // |
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57 DeviceLiwIterable::DeviceLiwIterable( |
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58 ExecState* exec, |
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59 CDeviceLiwBinding* binding, |
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60 CLiwIterable* variant) |
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61 : JSObject(exec->lexicalInterpreter()->builtinObjectPrototype() ) |
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62 { |
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63 m_privateData = new DeviceLiwIterablePrivate(variant, binding); |
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64 if (!m_privateData || !m_privateData->m_jsobjArray ) |
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65 m_valid = false; |
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66 else |
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67 { |
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68 m_valid = true; |
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69 KJS::Collector::protect(this); |
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70 } |
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71 } |
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72 |
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73 // ---------------------------------------------------------------------------- |
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74 // DeviceLiwIterable::~DeviceLiwIterable |
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75 // |
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76 // ---------------------------------------------------------------------------- |
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77 // |
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78 DeviceLiwIterable::~DeviceLiwIterable() |
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79 { |
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80 // only can be called by garbage collection after the |
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81 // DeviceLiwIterable::Close() was called |
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82 } |
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83 |
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84 // ---------------------------------------------------------------------------- |
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85 // DeviceLiwIterable::Close() |
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86 // |
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87 // ---------------------------------------------------------------------------- |
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88 // |
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89 void DeviceLiwIterable::Close(ExecState* exec, bool unmark) |
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90 { |
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91 // avoid double close |
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92 if(!m_valid) |
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93 { |
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94 if(unmark) |
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95 { |
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96 // unprotect this to allow the garbage collection to release this jsobject |
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97 KJS::Collector::unprotect(this); |
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98 } |
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99 return; |
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100 } |
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101 |
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102 // need exec to close other jsobject |
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103 m_privateData->m_exec = exec; |
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104 delete m_privateData; |
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105 m_privateData = NULL; |
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106 m_valid = false; |
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107 |
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108 if(unmark) |
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109 { |
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110 // unprotect this to allow the garbage collection to release this jsobject |
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111 KJS::Collector::unprotect(this); |
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112 } |
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113 } |
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114 |
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115 // ---------------------------------------------------------------------------- |
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116 // DeviceLiwIterable::toString |
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117 // Returns string representation of the object |
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118 // |
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119 // ---------------------------------------------------------------------------- |
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120 UString DeviceLiwIterable::toString(ExecState* /*exec*/) const |
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121 { |
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122 return "[object DeviceLiwIterable]"; |
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123 } |
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124 |
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125 // ---------------------------------------------------------------------------- |
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126 // Device::getOwnPropertySlot |
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127 // |
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128 // ---------------------------------------------------------------------------- |
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129 |
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130 bool DeviceLiwIterable::getOwnPropertySlot(ExecState* exec, const Identifier& propertyName, PropertySlot& slot) |
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131 { |
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132 // When the DeviceLiwIterable is valid, the check order is |
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133 // DeviceLiwIterable table => own property => prototype property |
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134 // When the DeviceLiwIterable is invalid (after close), the check order is |
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135 // close function in table => prototype property |
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136 |
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137 // 1. when it is valid |
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138 if(m_valid) |
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139 { |
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140 // 1.1 check DeviceLiwIterable table |
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141 const HashEntry* entry = Lookup::findEntry(&DeviceLiwIterableTable, propertyName); |
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142 if (entry) |
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143 { |
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144 slot.setStaticEntry(this, entry, staticValueGetter<DeviceLiwIterable>); |
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145 return true; |
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146 } |
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147 |
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148 // 1.2 check own property |
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149 if(JSObject::getOwnPropertySlot(exec, propertyName, slot)) |
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150 return true; |
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151 |
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152 // 1.3 check prototypes |
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153 JSObject *proto = static_cast<JSObject *>(this->prototype()); |
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154 while (!proto->isNull() && proto->isObject()) |
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155 { |
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156 if (proto->getOwnPropertySlot(exec, propertyName, slot)) |
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157 return true; |
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158 |
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159 proto = static_cast<JSObject *>(proto->prototype()); |
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160 } |
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161 } |
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162 // 2. when it is invalid |
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163 else |
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164 { |
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165 // 2.1 check close() function |
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166 if (propertyName == "close") |
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167 { |
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168 const HashEntry* entry = Lookup::findEntry(&DeviceLiwIterableTable, propertyName); |
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169 if (entry) |
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170 { |
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171 slot.setStaticEntry(this, entry, staticValueGetter<DeviceLiwIterable>); |
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172 return true; |
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173 } |
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174 } |
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175 |
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176 // 2.2 check prototypes |
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177 JSObject *proto = static_cast<JSObject *>(this->prototype()); |
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178 while (!proto->isNull() && proto->isObject()) |
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179 { |
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180 if (proto->getOwnPropertySlot(exec, propertyName, slot)) |
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181 return true; |
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182 |
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183 proto = static_cast<JSObject *>(proto->prototype()); |
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184 } |
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185 } |
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186 |
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187 return false; |
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188 } |
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189 |
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190 // ---------------------------------------------------------------------------- |
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191 // JSVersion::getValueProperty |
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192 // |
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193 // ---------------------------------------------------------------------------- |
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194 JSValue* DeviceLiwIterable::getValueProperty(ExecState *exec, int token) const |
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195 { |
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196 DeviceLiwIterableFunc *lf; |
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197 switch (token) |
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198 { |
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199 // Unfortunately, the only operations that LIW Iterables support are next() and reset(). e.g. there |
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200 // are no hasNext() or count() operations typical for iterators. |
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201 case getNext: |
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202 case reset: |
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203 case close: |
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204 { |
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205 lf = new DeviceLiwIterableFunc(exec, token); |
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206 break; |
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207 } |
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208 |
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209 default: |
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210 return throwError(exec, GeneralError); |
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211 } |
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212 return lf; |
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213 } |
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214 |
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215 // --------------------------------------------------------------------------- |
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216 // DeviceLiwIterablePrivate constructor |
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217 // |
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218 // --------------------------------------------------------------------------- |
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219 DeviceLiwIterablePrivate::DeviceLiwIterablePrivate(const CLiwIterable* liwIterable, CDeviceLiwBinding* liwBinding) |
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220 { |
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221 TRAP_IGNORE( |
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222 m_liwBinding = liwBinding; |
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223 m_jsobjArray = new RPointerArray<JSObject>( INIT_JSOBJ_ARRAY_SIZE ); |
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224 m_exec = NULL; |
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225 m_iterable = (CLiwIterable*) liwIterable; |
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226 if ( m_iterable ) |
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227 m_iterable->IncRef(); |
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228 ) |
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229 } |
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230 |
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231 // --------------------------------------------------------------------------- |
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232 // DeviceLiwMapPrivate::Close |
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233 // |
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234 // --------------------------------------------------------------------------- |
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235 void DeviceLiwIterablePrivate::Close() |
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236 { |
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237 // close the jsobject |
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238 if ( m_jsobjArray && m_exec ) |
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239 { |
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240 // close all the DeviceLiwMap objects and DeviceLiwIterable objects |
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241 for (int i = 0; i < m_jsobjArray->Count(); i++) |
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242 { |
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243 JSObject * jsobj = (*m_jsobjArray)[i]; |
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244 if (jsobj->inherits( &DeviceLiwIterable::info )) |
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245 { |
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246 (static_cast<DeviceLiwIterable*>(jsobj))->Close(m_exec, true); |
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247 } |
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248 else if (jsobj->inherits( &DeviceLiwMap::info )) |
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249 { |
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250 (static_cast<DeviceLiwMap*>(jsobj))->Close(m_exec, true); |
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251 } |
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252 } |
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253 m_jsobjArray->Close(); |
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254 delete m_jsobjArray; |
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255 m_jsobjArray = NULL; |
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256 m_exec = NULL; |
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257 } |
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258 |
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259 // release the map |
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260 if ( m_iterable ) |
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261 { |
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262 m_iterable->DecRef(); |
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263 m_iterable = NULL; |
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264 } |
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265 } |
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266 |
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267 // ---------------------------------------------------------------------------- |
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268 // DeviceLiwIterablePrivate::DeviceLiwIterableFunc |
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269 // |
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270 // ---------------------------------------------------------------------------- |
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271 // |
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272 DeviceLiwIterableFunc::DeviceLiwIterableFunc( ExecState* exec, int token ) |
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273 : JSObject( exec->lexicalInterpreter()->builtinObjectPrototype() ), |
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274 m_func( token ) |
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275 { |
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276 } |
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277 |
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278 // ---------------------------------------------------------------------------- |
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279 // DeviceLiwIterableFunc::~DeviceLiwIterableFunc |
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280 // |
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281 // ---------------------------------------------------------------------------- |
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282 // |
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283 DeviceLiwIterableFunc::~DeviceLiwIterableFunc() |
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284 { |
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285 } |
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286 |
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287 // ---------------------------------------------------------------------------- |
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288 // DeviceLiwIterableFunc::implementsCall |
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289 // |
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290 // ---------------------------------------------------------------------------- |
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291 // |
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292 bool DeviceLiwIterableFunc::implementsCall() const |
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293 { |
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294 return true; |
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295 } |
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296 |
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297 // ---------------------------------------------------------------------------- |
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298 // DeviceLiwIterableFunc::callAsFunction |
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299 // |
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300 // ---------------------------------------------------------------------------- |
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301 // |
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302 JSValue* DeviceLiwIterableFunc::callAsFunction(ExecState* exec, JSObject *thisObj, const List& aArgs ) |
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303 { |
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304 JSValue* rval = jsUndefined(); |
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305 TBool found = EFalse; |
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306 |
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307 if (!thisObj->inherits(&DeviceLiwIterable::info)) { |
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308 return throwError(exec, GeneralError); |
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309 } |
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310 |
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311 DeviceLiwIterable *it = static_cast<DeviceLiwIterable *>(thisObj); |
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312 |
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313 if ( !it->isValid() || !it->m_privateData->m_liwBinding || !it->m_privateData->m_iterable) { |
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314 return rval; |
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315 } |
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316 |
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317 if ( m_func == DeviceLiwIterable::getNext ) { |
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318 TLiwVariant vv; |
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319 TRAP_IGNORE( found = it->m_privateData->m_iterable->NextL( vv ) ); |
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320 if( found ) |
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321 { |
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322 rval = it->m_privateData->m_liwBinding->LiwVariant2JsVal( exec, vv ); |
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323 if(rval->isObject()) |
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324 { |
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325 JSObject* obj = static_cast<JSObject*> (rval); |
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326 if(obj->inherits( &KJS::DeviceLiwIterable::info ) || obj->inherits( &KJS::DeviceLiwMap::info )) |
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327 { |
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328 // insert into jsobject array |
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329 it->m_privateData->m_jsobjArray->Append(obj); |
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330 } |
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331 } |
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332 |
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333 vv.Reset(); |
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334 } |
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335 } |
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336 else if ( m_func == DeviceLiwIterable::reset ){ |
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337 it->m_privateData->m_iterable->Reset(); |
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338 } |
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339 else if ( m_func == DeviceLiwIterable::close ){ |
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340 it->Close(exec, false); |
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341 } |
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342 return rval; |
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343 } |
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344 //END OF FILE |
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345 |
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346 |
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347 |