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1 /* |
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2 * Copyright (c) 2003 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: Handles table elements in XHTML documents. |
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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 #ifndef CXHTMLTABLEELEMENTHANDLER__H |
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21 #define CXHTMLTABLEELEMENTHANDLER__H |
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22 |
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23 // INCLUDES |
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24 #include <e32def.h> |
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25 #include <e32base.h> |
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26 |
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27 #include "nwx_defs.h" |
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28 #include "nw_dom_node.h" |
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29 |
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30 |
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31 // CONSTANTS |
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32 |
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33 // MACROS |
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34 |
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35 // DATA TYPES |
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36 |
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37 // FUNCTION PROTOTYPES |
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38 |
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39 // FORWARD DECLARATIONS |
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40 #ifdef __cplusplus |
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41 extern "C" { |
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42 #endif /* __cplusplus */ |
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43 |
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44 typedef struct NW_XHTML_ContentHandler_s NW_XHTML_ContentHandler_t; |
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45 typedef struct NW_XHTML_ElementHandler_s NW_XHTML_ElementHandler_t; |
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46 typedef struct NW_LMgr_Box_s NW_LMgr_Box_t; |
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47 typedef struct NW_LMgr_RootBox_s NW_LMgr_RootBox_t; |
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48 typedef struct NW_LMgr_ContainerBox_s NW_LMgr_ContainerBox_t; |
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49 |
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50 #ifdef __cplusplus |
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51 } |
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52 #endif /* __cplusplus */ |
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53 |
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54 // CLASS DECLARATION |
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55 |
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56 // TODO: This class should be derived from CElementHandler once the browser is |
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57 // converted to c++. |
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58 |
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59 class CXHTMLTableElementHandler : public CBase |
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60 { |
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61 public: // Constructors and destructor |
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62 /** |
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63 * Two-phased constructor. |
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64 */ |
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65 static CXHTMLTableElementHandler* NewL(const NW_XHTML_ElementHandler_t* aElementHandler, |
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66 NW_XHTML_ContentHandler_t* aContentHandler, NW_DOM_ElementNode_t* aElementNode); |
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67 |
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68 /** |
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69 * Destructor. |
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70 */ |
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71 virtual ~CXHTMLTableElementHandler(); |
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72 |
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73 |
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74 public: // New Methods |
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75 /** |
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76 * Initializes the ElementHandler. |
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77 * |
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78 * @return status code |
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79 */ |
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80 virtual TBrowserStatusCode Initialize(void); |
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81 |
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82 /** |
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83 * Creates the box-tree associated with the tag. |
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84 * |
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85 * @param aParentBox the parent to attach the new box-tree to. |
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86 * @return status code |
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87 */ |
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88 virtual TBrowserStatusCode CreateBoxTree(NW_LMgr_ContainerBox_t& aParentBox); |
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89 |
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90 /** |
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91 * Returns whether or not grid mode applies to this table. |
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92 * |
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93 * @return ETrue or EFalse. |
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94 */ |
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95 TBool DoesGridModeApply(void); |
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96 |
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97 |
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98 private: // Private Methods |
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99 /** |
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100 * C++ default constructor. |
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101 */ |
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102 CXHTMLTableElementHandler(const NW_XHTML_ElementHandler_t* aElementHandler, |
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103 NW_XHTML_ContentHandler_t* aContentHandler, NW_DOM_ElementNode_t* aElementNode); |
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104 |
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105 /** |
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106 * By default Symbian 2nd phase constructor is private. |
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107 */ |
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108 void ConstructL(void); |
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109 |
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110 /** |
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111 * A simple helper method to create the box-tree. |
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112 * |
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113 * @param aElementNode the table's element node. |
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114 * @param aTableBox the table's box. |
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115 * @param aTableContainerParent the table's parent's box. |
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116 * |
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117 * @return status code |
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118 */ |
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119 TBrowserStatusCode CreateSubTree(NW_DOM_ElementNode_t* aElementNode, |
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120 NW_LMgr_Box_t* aTableBox, NW_LMgr_ContainerBox_t* aTableContainerParent); |
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121 |
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122 /** |
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123 * A simple helper method to create the box-tree. |
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124 * |
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125 * @param aElementHandler the table's element handler. |
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126 * @param aElementNode the table's element node. |
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127 * @param aTableBox the table's box. |
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128 * @param aTableContainerParent the table's parent's box. |
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129 * |
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130 * @return status code |
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131 */ |
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132 TBrowserStatusCode CreateSubTreeHelper(const NW_XHTML_ElementHandler_t* aElementHandler, |
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133 NW_DOM_ElementNode_t* aElementNode, NW_LMgr_Box_t* aTableBox, |
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134 NW_LMgr_ContainerBox_t* aTableContainerParent); |
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135 |
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136 /** |
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137 * Returns true if the parent has only one element, ignoring text nodes that |
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138 * only contain whitespace. |
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139 * |
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140 * @return true or false. |
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141 */ |
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142 NW_Bool HasOnlyOneElementChild(NW_DOM_Node_t* aParentNode); |
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143 |
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144 /** |
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145 * This method is called each time a table chunk arrives. It is used |
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146 * to determine whether or not that table should be laid out in grid mode. |
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147 * |
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148 * @return status code |
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149 */ |
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150 TBrowserStatusCode PreEvalTable(); |
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151 |
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152 /** |
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153 * This method is called after all of the chunks of a table arrive. It is used |
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154 * to determine whether or not that table should be laid out in grid mode. |
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155 * |
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156 * @return status code |
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157 */ |
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158 TBrowserStatusCode PostEvalTable(); |
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159 |
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160 |
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161 private: // Data |
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162 const NW_XHTML_ElementHandler_t* iElementHandler; |
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163 NW_XHTML_ContentHandler_t* iContentHandler; |
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164 NW_DOM_ElementNode_t* iElementNode; |
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165 NW_LMgr_RootBox_t* iRootBox; |
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166 NW_Float32 iScreenWidth; |
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167 |
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168 TInt8 iIsGridMode; |
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169 NW_DOM_Node_t* iLastEvaluatedElement; |
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170 TInt32 iNumberOfElements; |
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171 }; |
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172 |
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173 #endif // CXHTMLTABLEELEMENTHANDLER__H |