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1 /*
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2 * File: KeyTable.js
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3 * Version: 1.1.7
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4 * CVS: $Idj$
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5 * Description: Keyboard navigation for HTML tables
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6 * Author: Allan Jardine (www.sprymedia.co.uk)
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7 * Created: Fri Mar 13 21:24:02 GMT 2009
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8 * Modified: $Date$ by $Author$
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9 * Language: Javascript
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10 * License: GPL v2 or BSD 3 point style
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11 * Project: Just a little bit of fun :-)
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12 * Contact: www.sprymedia.co.uk/contact
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13 *
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14 * Copyright 2009-2011 Allan Jardine, all rights reserved.
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15 *
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16 * This source file is free software, under either the GPL v2 license or a
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17 * BSD style license, available at:
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18 * http://datatables.net/license_gpl2
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19 * http://datatables.net/license_bsd
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20 */
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21
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22
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23 function KeyTable ( oInit )
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24 {
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25 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
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26 * API parameters
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27 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
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28
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29 /*
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30 * Variable: block
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31 * Purpose: Flag whether or not KeyTable events should be processed
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32 * Scope: KeyTable - public
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33 */
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34 this.block = false;
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35
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36 /*
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37 * Variable: event
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38 * Purpose: Container for all event application methods
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39 * Scope: KeyTable - public
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40 * Notes: This object contains all the public methods for adding and removing events - these
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41 * are dynamically added later on
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42 */
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43 this.event = {
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44 "remove": {}
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45 };
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46
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47
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48 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
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49 * API methods
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50 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
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51
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52 /*
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53 * Function: fnGetCurrentPosition
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54 * Purpose: Get the currently focused cell's position
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55 * Returns: array int: [ x, y ]
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56 * Inputs: void
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57 */
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58 this.fnGetCurrentPosition = function ()
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59 {
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60 return [ _iOldX, _iOldY ];
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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 * Function: fnGetCurrentData
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66 * Purpose: Get the currently focused cell's data (innerHTML)
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67 * Returns: string: - data requested
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68 * Inputs: void
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69 */
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70 this.fnGetCurrentData = function ()
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71 {
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72 return _nOldFocus.innerHTML;
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73 };
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74
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75
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76 /*
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77 * Function: fnGetCurrentTD
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78 * Purpose: Get the currently focused cell
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79 * Returns: node: - focused element
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80 * Inputs: void
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81 */
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82 this.fnGetCurrentTD = function ()
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83 {
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84 return _nOldFocus;
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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 * Function: fnSetPosition
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90 * Purpose: Set the position of the focused cell
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91 * Returns: -
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92 * Inputs: int:x - x coordinate
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93 * int:y - y coordinate
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94 * Notes: Thanks to Rohan Daxini for the basis of this function
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95 */
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96 this.fnSetPosition = function( x, y )
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97 {
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98 if ( typeof x == 'object' && x.nodeName )
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99 {
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100 _fnSetFocus( x );
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101 }
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102 else
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103 {
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104 _fnSetFocus( _fnCellFromCoords(x, y) );
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105 }
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106 };
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107
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108
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109 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
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110 * Private parameters
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111 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
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112
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113 /*
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114 * Variable: _nBody
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115 * Purpose: Body node of the table - cached for renference
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116 * Scope: KeyTable - private
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117 */
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118 var _nBody = null;
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119
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120 /*
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121 * Variable:
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122 * Purpose:
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123 * Scope: KeyTable - private
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124 */
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125 var _nOldFocus = null;
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126
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127 /*
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128 * Variable: _iOldX and _iOldY
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129 * Purpose: X and Y coords of the old elemet that was focused on
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130 * Scope: KeyTable - private
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131 */
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132 var _iOldX = null;
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133 var _iOldY = null;
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134
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135 /*
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136 * Variable: _that
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137 * Purpose: Scope saving for 'this' after a jQuery event
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138 * Scope: KeyTable - private
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139 */
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140 var _that = null;
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141
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142 /*
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143 * Variable: sFocusClass
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144 * Purpose: Class that should be used for focusing on a cell
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145 * Scope: KeyTable - private
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146 */
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147 var _sFocusClass = "focus";
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148
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149 /*
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150 * Variable: _bKeyCapture
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151 * Purpose: Flag for should KeyTable capture key events or not
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152 * Scope: KeyTable - private
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153 */
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154 var _bKeyCapture = false;
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155
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156 /*
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157 * Variable: _oaoEvents
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158 * Purpose: Event cache object, one array for each supported event for speed of searching
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159 * Scope: KeyTable - private
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160 */
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161 var _oaoEvents = {
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162 "action": [],
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163 "esc": [],
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164 "focus": [],
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165 "blur": []
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166 };
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167
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168 /*
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169 * Variable: _oDatatable
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170 * Purpose: DataTables object for if we are actually using a DataTables table
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171 * Scope: KeyTable - private
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172 */
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173 var _oDatatable = null;
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174
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175 var _bForm;
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176 var _nInput;
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177 var _bInputFocused = false;
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178
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179
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180 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
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181 * Private methods
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182 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
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183
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184 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
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185 * Key table events
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186 */
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187
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188 /*
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189 * Function: _fnEventAddTemplate
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190 * Purpose: Create a function (with closure for sKey) event addition API
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191 * Returns: function: - template function
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192 * Inputs: string:sKey - type of event to detect
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193 */
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194 function _fnEventAddTemplate( sKey )
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195 {
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196 /*
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197 * Function: -
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198 * Purpose: API function for adding event to cache
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199 * Returns: -
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200 * Inputs: 1. node:x - target node to add event for
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201 * 2. function:y - callback function to apply
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202 * or
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203 * 1. int:x - x coord. of target cell (can be null for live events)
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204 * 2. int:y - y coord. of target cell (can be null for live events)
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205 * 3. function:z - callback function to apply
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206 * Notes: This function is (interally) overloaded (in as much as javascript allows for
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207 * that) - the target cell can be given by either node or coords.
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208 */
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209 return function ( x, y, z ) {
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210 if ( (x===null || typeof x == "number") &&
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211 (y===null || typeof y == "number") &&
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212 typeof z == "function" )
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213 {
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214 _fnEventAdd( sKey, x, y, z );
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215 }
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216 else if ( typeof x == "object" && typeof y == "function" )
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217 {
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218 var aCoords = _fnCoordsFromCell( x );
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219 _fnEventAdd( sKey, aCoords[0], aCoords[1], y );
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220 }
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221 else
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222 {
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223 alert( "Unhandable event type was added: x" +x+ " y:" +y+ " z:" +z );
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224 }
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225 };
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226 }
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227
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228
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229 /*
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230 * Function: _fnEventRemoveTemplate
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231 * Purpose: Create a function (with closure for sKey) event removal API
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232 * Returns: function: - template function
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233 * Inputs: string:sKey - type of event to detect
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234 */
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235 function _fnEventRemoveTemplate( sKey )
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236 {
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237 /*
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238 * Function: -
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239 * Purpose: API function for removing event from cache
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240 * Returns: int: - number of events removed
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241 * Inputs: 1. node:x - target node to remove event from
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242 * 2. function:y - callback function to apply
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243 * or
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244 * 1. int:x - x coord. of target cell (can be null for live events)
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245 * 2. int:y - y coord. of target cell (can be null for live events)
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246 * 3. function:z - callback function to remove - optional
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247 * Notes: This function is (interally) overloaded (in as much as javascript allows for
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248 * that) - the target cell can be given by either node or coords and the function
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249 * to remove is optional
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250 */
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251 return function ( x, y, z ) {
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252 if ( (x===null || typeof arguments[0] == "number") &&
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253 (y===null || typeof arguments[1] == "number" ) )
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254 {
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255 if ( typeof arguments[2] == "function" )
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256 {
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257 _fnEventRemove( sKey, x, y, z );
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258 }
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259 else
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260 {
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261 _fnEventRemove( sKey, x, y );
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262 }
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263 }
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264 else if ( typeof arguments[0] == "object" )
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265 {
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266 var aCoords = _fnCoordsFromCell( x );
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267 if ( typeof arguments[1] == "function" )
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268 {
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269 _fnEventRemove( sKey, aCoords[0], aCoords[1], y );
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270 }
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271 else
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272 {
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273 _fnEventRemove( sKey, aCoords[0], aCoords[1] );
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274 }
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275 }
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276 else
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277 {
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278 alert( "Unhandable event type was removed: x" +x+ " y:" +y+ " z:" +z );
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279 }
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280 };
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281 }
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282
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283 /* Use the template functions to add the event API functions */
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284 for ( var sKey in _oaoEvents )
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285 {
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286 if ( sKey )
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287 {
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288 this.event[sKey] = _fnEventAddTemplate( sKey );
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289 this.event.remove[sKey] = _fnEventRemoveTemplate( sKey );
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290 }
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291 }
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292
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293
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294 /*
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295 * Function: _fnEventAdd
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296 * Purpose: Add an event to the internal cache
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297 * Returns: -
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298 * Inputs: string:sType - type of event to add, given by the available elements in _oaoEvents
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299 * int:x - x-coords to add event to - can be null for "blanket" event
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300 * int:y - y-coords to add event to - can be null for "blanket" event
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301 * function:fn - callback function for when triggered
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302 */
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303 function _fnEventAdd( sType, x, y, fn )
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304 {
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305 _oaoEvents[sType].push( {
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306 "x": x,
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307 "y": y,
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308 "fn": fn
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309 } );
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310 }
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311
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312
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313 /*
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314 * Function: _fnEventRemove
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315 * Purpose: Remove an event from the event cache
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316 * Returns: int: - number of matching events removed
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317 * Inputs: string:sType - type of event to look for
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318 * node:nTarget - target table cell
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319 * function:fn - optional - remove this function. If not given all handlers of this
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320 * type will be removed
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321 */
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322 function _fnEventRemove( sType, x, y, fn )
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323 {
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324 var iCorrector = 0;
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325
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326 for ( var i=0, iLen=_oaoEvents[sType].length ; i<iLen-iCorrector ; i++ )
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327 {
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328 if ( typeof fn != 'undefined' )
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329 {
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330 if ( _oaoEvents[sType][i-iCorrector].x == x &&
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331 _oaoEvents[sType][i-iCorrector].y == y &&
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332 _oaoEvents[sType][i-iCorrector].fn == fn )
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333 {
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334 _oaoEvents[sType].splice( i-iCorrector, 1 );
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335 iCorrector++;
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336 }
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337 }
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338 else
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339 {
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340 if ( _oaoEvents[sType][i-iCorrector].x == x &&
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341 _oaoEvents[sType][i-iCorrector].y == y )
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342 {
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343 _oaoEvents[sType].splice( i, 1 );
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344 return 1;
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345 }
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346 }
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347 }
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348 return iCorrector;
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349 }
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350
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351
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352 /*
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353 * Function: _fnEventFire
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354 * Purpose: Look thought the events cache and fire off the event of interest
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355 * Returns: int:iFired - number of events fired
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356 * Inputs: string:sType - type of event to look for
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357 * int:x - x coord of cell
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358 * int:y - y coord of ell
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359 * Notes: It might be more efficient to return after the first event has been tirggered,
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360 * but that would mean that only one function of a particular type can be
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361 * subscribed to a particular node.
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362 */
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363 function _fnEventFire ( sType, x, y )
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364 {
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365 var iFired = 0;
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366 var aEvents = _oaoEvents[sType];
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367 for ( var i=0 ; i<aEvents.length ; i++ )
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368 {
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369 if ( (aEvents[i].x == x && aEvents[i].y == y ) ||
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370 (aEvents[i].x === null && aEvents[i].y == y ) ||
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371 (aEvents[i].x == x && aEvents[i].y === null ) ||
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372 (aEvents[i].x === null && aEvents[i].y === null )
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373 )
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374 {
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375 aEvents[i].fn( _fnCellFromCoords(x,y), x, y );
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376 iFired++;
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377 }
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378 }
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379 return iFired;
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380 }
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381
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382
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383
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384 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
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385 * Focus functions
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386 */
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387
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388 /*
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389 * Function: _fnSetFocus
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390 * Purpose: Set focus on a node, and remove from an old node if needed
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391 * Returns: -
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392 * Inputs: node:nTarget - node we want to focus on
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393 * bool:bAutoScroll - optional - should we scroll the view port to the display
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394 */
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395 function _fnSetFocus( nTarget, bAutoScroll )
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396 {
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397 /* If node already has focus, just ignore this call */
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398 if ( _nOldFocus == nTarget )
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399 {
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400 return;
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401 }
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402
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403 if ( typeof bAutoScroll == 'undefined' )
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404 {
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405 bAutoScroll = true;
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406 }
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407
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408 /* Remove old focus (with blur event if needed) */
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409 if ( _nOldFocus !== null )
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410 {
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411 _fnRemoveFocus( _nOldFocus );
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412 }
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413
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414 /* Add the new class to highlight the focused cell */
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415 jQuery(nTarget).addClass( _sFocusClass );
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416 jQuery(nTarget).parent().addClass( _sFocusClass );
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417
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418 /* If it's a DataTable then we need to jump the paging to the relevant page */
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419 var oSettings;
|
|
|
420 if ( _oDatatable )
|
|
|
421 {
|
|
|
422 oSettings = _oDatatable.fnSettings();
|
|
|
423 var iRow = _fnFindDtCell( nTarget )[1];
|
|
|
424 var bKeyCaptureCache = _bKeyCapture;
|
|
|
425
|
|
|
426 /* Page forwards */
|
|
|
427 while ( iRow >= oSettings.fnDisplayEnd() )
|
|
|
428 {
|
|
|
429 if ( oSettings._iDisplayLength >= 0 )
|
|
|
430 {
|
|
|
431 /* Make sure we are not over running the display array */
|
|
|
432 if ( oSettings._iDisplayStart + oSettings._iDisplayLength < oSettings.fnRecordsDisplay() )
|
|
|
433 {
|
|
|
434 oSettings._iDisplayStart += oSettings._iDisplayLength;
|
|
|
435 }
|
|
|
436 }
|
|
|
437 else
|
|
|
438 {
|
|
|
439 oSettings._iDisplayStart = 0;
|
|
|
440 }
|
|
|
441 _oDatatable.oApi._fnCalculateEnd( oSettings );
|
|
|
442 }
|
|
|
443
|
|
|
444 /* Page backwards */
|
|
|
445 while ( iRow < oSettings._iDisplayStart )
|
|
|
446 {
|
|
|
447 oSettings._iDisplayStart = oSettings._iDisplayLength>=0 ?
|
|
|
448 oSettings._iDisplayStart - oSettings._iDisplayLength :
|
|
|
449 0;
|
|
|
450
|
|
|
451 if ( oSettings._iDisplayStart < 0 )
|
|
|
452 {
|
|
|
453 oSettings._iDisplayStart = 0;
|
|
|
454 }
|
|
|
455 _oDatatable.oApi._fnCalculateEnd( oSettings );
|
|
|
456 }
|
|
|
457
|
|
|
458 /* Re-draw the table */
|
|
|
459 _oDatatable.oApi._fnDraw( oSettings );
|
|
|
460
|
|
|
461 /* Restore the key capture */
|
|
|
462 _bKeyCapture = bKeyCaptureCache;
|
|
|
463 }
|
|
|
464
|
|
|
465 /* Cache the information that we are interested in */
|
|
|
466 var aNewPos = _fnCoordsFromCell( nTarget );
|
|
|
467 _nOldFocus = nTarget;
|
|
|
468 _iOldX = aNewPos[0];
|
|
|
469 _iOldY = aNewPos[1];
|
|
|
470
|
|
|
471 var iViewportHeight, iViewportWidth, iScrollTop, iScrollLeft, iHeight, iWidth, aiPos;
|
|
|
472 if ( bAutoScroll )
|
|
|
473 {
|
|
|
474 /* Scroll the viewport such that the new cell is fully visible in the rendered window */
|
|
|
475 iViewportHeight = document.documentElement.clientHeight;
|
|
|
476 iViewportWidth = document.documentElement.clientWidth;
|
|
|
477 iScrollTop = document.body.scrollTop || document.documentElement.scrollTop;
|
|
|
478 iScrollLeft = document.body.scrollLeft || document.documentElement.scrollLeft;
|
|
|
479 iHeight = nTarget.offsetHeight;
|
|
|
480 iWidth = nTarget.offsetWidth;
|
|
|
481 aiPos = _fnGetPos( nTarget );
|
|
|
482
|
|
|
483 /* Take account of scrolling in DataTables 1.7 - remove scrolling since that would add to
|
|
|
484 * the positioning calculation
|
|
|
485 */
|
|
|
486 if ( _oDatatable && typeof oSettings.oScroll != 'undefined' &&
|
|
|
487 (oSettings.oScroll.sX !== "" || oSettings.oScroll.sY !== "") )
|
|
|
488 {
|
|
|
489 aiPos[1] -= $(oSettings.nTable.parentNode).scrollTop();
|
|
|
490 aiPos[0] -= $(oSettings.nTable.parentNode).scrollLeft();
|
|
|
491 }
|
|
|
492
|
|
|
493 /* Correct viewport positioning for vertical scrolling */
|
|
|
494 if ( aiPos[1]+iHeight > iScrollTop+iViewportHeight )
|
|
|
495 {
|
|
|
496 /* Displayed element if off the bottom of the viewport */
|
|
|
497 _fnSetScrollTop( aiPos[1]+iHeight - iViewportHeight );
|
|
|
498 }
|
|
|
499 else if ( aiPos[1] < iScrollTop )
|
|
|
500 {
|
|
|
501 /* Displayed element if off the top of the viewport */
|
|
|
502 _fnSetScrollTop( aiPos[1] );
|
|
|
503 }
|
|
|
504
|
|
|
505 /* Correct viewport positioning for horizontal scrolling */
|
|
|
506 if ( aiPos[0]+iWidth > iScrollLeft+iViewportWidth )
|
|
|
507 {
|
|
|
508 /* Displayed element is off the bottom of the viewport */
|
|
|
509 _fnSetScrollLeft( aiPos[0]+iWidth - iViewportWidth );
|
|
|
510 }
|
|
|
511 else if ( aiPos[0] < iScrollLeft )
|
|
|
512 {
|
|
|
513 /* Displayed element if off the Left of the viewport */
|
|
|
514 _fnSetScrollLeft( aiPos[0] );
|
|
|
515 }
|
|
|
516 }
|
|
|
517
|
|
|
518 /* Take account of scrolling in DataTables 1.7 */
|
|
|
519 if ( _oDatatable && typeof oSettings.oScroll != 'undefined' &&
|
|
|
520 (oSettings.oScroll.sX !== "" || oSettings.oScroll.sY !== "") )
|
|
|
521 {
|
|
|
522 var dtScrollBody = oSettings.nTable.parentNode;
|
|
|
523 iViewportHeight = dtScrollBody.clientHeight;
|
|
|
524 iViewportWidth = dtScrollBody.clientWidth;
|
|
|
525 iScrollTop = dtScrollBody.scrollTop;
|
|
|
526 iScrollLeft = dtScrollBody.scrollLeft;
|
|
|
527 iHeight = nTarget.offsetHeight;
|
|
|
528 iWidth = nTarget.offsetWidth;
|
|
|
529
|
|
|
530 /* Correct for vertical scrolling */
|
|
|
531 if ( nTarget.offsetTop + iHeight > iViewportHeight+iScrollTop )
|
|
|
532 {
|
|
|
533 dtScrollBody.scrollTop = (nTarget.offsetTop + iHeight) - iViewportHeight;
|
|
|
534 }
|
|
|
535 else if ( nTarget.offsetTop < iScrollTop )
|
|
|
536 {
|
|
|
537 dtScrollBody.scrollTop = nTarget.offsetTop;
|
|
|
538 }
|
|
|
539
|
|
|
540 /* Correct for horizontal scrolling */
|
|
|
541 if ( nTarget.offsetLeft + iWidth > iViewportWidth+iScrollLeft )
|
|
|
542 {
|
|
|
543 dtScrollBody.scrollLeft = (nTarget.offsetLeft + iWidth) - iViewportWidth;
|
|
|
544 }
|
|
|
545 else if ( nTarget.offsetLeft < iScrollLeft )
|
|
|
546 {
|
|
|
547 dtScrollBody.scrollLeft = nTarget.offsetLeft;
|
|
|
548 }
|
|
|
549 }
|
|
|
550
|
|
|
551 /* Focused - so we want to capture the keys */
|
|
|
552 _fnCaptureKeys();
|
|
|
553
|
|
|
554 /* Fire of the focus event if there is one */
|
|
|
555 _fnEventFire( "focus", _iOldX, _iOldY );
|
|
|
556 }
|
|
|
557
|
|
|
558
|
|
|
559 /*
|
|
|
560 * Function: _fnBlur
|
|
|
561 * Purpose: Blur focus from the whole table
|
|
|
562 * Returns: -
|
|
|
563 * Inputs: -
|
|
|
564 */
|
|
|
565 function _fnBlur()
|
|
|
566 {
|
|
|
567 _fnRemoveFocus( _nOldFocus );
|
|
|
568 _iOldX = null;
|
|
|
569 _iOldY = null;
|
|
|
570 _nOldFocus = null;
|
|
|
571 _fnReleaseKeys();
|
|
|
572 }
|
|
|
573
|
|
|
574
|
|
|
575 /*
|
|
|
576 * Function: _fnRemoveFocus
|
|
|
577 * Purpose: Remove focus from a cell and fire any blur events which are attached
|
|
|
578 * Returns: -
|
|
|
579 * Inputs: node:nTarget - cell of interest
|
|
|
580 */
|
|
|
581 function _fnRemoveFocus( nTarget )
|
|
|
582 {
|
|
|
583 jQuery(nTarget).removeClass( _sFocusClass );
|
|
|
584 jQuery(nTarget).parent().removeClass( _sFocusClass );
|
|
|
585 _fnEventFire( "blur", _iOldX, _iOldY );
|
|
|
586 }
|
|
|
587
|
|
|
588
|
|
|
589 /*
|
|
|
590 * Function: _fnClick
|
|
|
591 * Purpose: Focus on the element that has been clicked on by the user
|
|
|
592 * Returns: -
|
|
|
593 * Inputs: event:e - click event
|
|
|
594 */
|
|
|
595 function _fnClick ( e )
|
|
|
596 {
|
|
|
597 var nTarget = this;
|
|
|
598 while ( nTarget.nodeName != "TD" )
|
|
|
599 {
|
|
|
600 nTarget = nTarget.parentNode;
|
|
|
601 }
|
|
|
602
|
|
|
603 _fnSetFocus( nTarget );
|
|
|
604 _fnCaptureKeys();
|
|
|
605 }
|
|
|
606
|
|
|
607
|
|
|
608
|
|
|
609 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
|
|
|
610 * Key events
|
|
|
611 */
|
|
|
612
|
|
|
613 /*
|
|
|
614 * Function: _fnKey
|
|
|
615 * Purpose: Deal with a key events, be it moving the focus or return etc.
|
|
|
616 * Returns: bool: - allow browser default action
|
|
|
617 * Inputs: event:e - key event
|
|
|
618 */
|
|
|
619 function _fnKey ( e )
|
|
|
620 {
|
|
|
621 /* If user or system has blocked KeyTable from doing anything, just ignore this event */
|
|
|
622 if ( _that.block || !_bKeyCapture )
|
|
|
623 {
|
|
|
624 return true;
|
|
|
625 }
|
|
|
626
|
|
|
627 /* If a modifier key is pressed (exapct shift), ignore the event */
|
|
|
628 if ( e.metaKey || e.altKey || e.ctrlKey )
|
|
|
629 {
|
|
|
630 return true;
|
|
|
631 }
|
|
|
632 var
|
|
|
633 x, y,
|
|
|
634 iTableWidth = _nBody.getElementsByTagName('tr')[0].getElementsByTagName('td').length,
|
|
|
635 iTableHeight;
|
|
|
636
|
|
|
637 /* Get table height and width - done here so as to be dynamic (if table is updated) */
|
|
|
638 if ( _oDatatable )
|
|
|
639 {
|
|
|
640 /*
|
|
|
641 * Locate the current node in the DataTable overriding the old positions - the reason for
|
|
|
642 * is is that there might have been some DataTables interaction between the last focus and
|
|
|
643 * now
|
|
|
644 */
|
|
|
645 var oSettings = _oDatatable.fnSettings();
|
|
|
646 iTableHeight = oSettings.aiDisplay.length;
|
|
|
647
|
|
|
648 var aDtPos = _fnFindDtCell( _nOldFocus );
|
|
|
649 if ( aDtPos === null )
|
|
|
650 {
|
|
|
651 /* If the table has been updated such that the focused cell can't be seen - do nothing */
|
|
|
652 return;
|
|
|
653 }
|
|
|
654 _iOldX = aDtPos[ 0 ];
|
|
|
655 _iOldY = aDtPos[ 1 ];
|
|
|
656 }
|
|
|
657 else
|
|
|
658 {
|
|
|
659 iTableHeight = _nBody.getElementsByTagName('tr').length;
|
|
|
660 }
|
|
|
661
|
|
|
662 /* Capture shift+tab to match the left arrow key */
|
|
|
663 var iKey = (e.keyCode == 9 && e.shiftKey) ? -1 : e.keyCode;
|
|
|
664
|
|
|
665 switch( iKey )
|
|
|
666 {
|
|
|
667 case 13: /* return */
|
|
|
668 e.preventDefault();
|
|
|
669 e.stopPropagation();
|
|
|
670 _fnEventFire( "action", _iOldX, _iOldY );
|
|
|
671 return true;
|
|
|
672
|
|
|
673 case 27: /* esc */
|
|
|
674 if ( !_fnEventFire( "esc", _iOldX, _iOldY ) )
|
|
|
675 {
|
|
|
676 /* Only lose focus if there isn't an escape handler on the cell */
|
|
|
677 _fnBlur();
|
|
|
678 return;
|
|
|
679 }
|
|
|
680 x = _iOldX;
|
|
|
681 y = _iOldY;
|
|
|
682 break;
|
|
|
683
|
|
|
684 case -1:
|
|
|
685 case 37: /* left arrow */
|
|
|
686 if ( _iOldX > 0 ) {
|
|
|
687 x = _iOldX - 1;
|
|
|
688 y = _iOldY;
|
|
|
689 } else if ( _iOldY > 0 ) {
|
|
|
690 x = iTableWidth-1;
|
|
|
691 y = _iOldY - 1;
|
|
|
692 } else {
|
|
|
693 /* at start of table */
|
|
|
694 if ( iKey == -1 && _bForm )
|
|
|
695 {
|
|
|
696 /* If we are in a form, return focus to the 'input' element such that tabbing will
|
|
|
697 * follow correctly in the browser
|
|
|
698 */
|
|
|
699 _bInputFocused = true;
|
|
|
700 _nInput.focus();
|
|
|
701
|
|
|
702 /* This timeout is a little nasty - but IE appears to have some asyhnc behaviour for
|
|
|
703 * focus
|
|
|
704 */
|
|
|
705 setTimeout( function(){ _bInputFocused = false; }, 0 );
|
|
|
706 _bKeyCapture = false;
|
|
|
707 _fnBlur();
|
|
|
708 return true;
|
|
|
709 }
|
|
|
710 else
|
|
|
711 {
|
|
|
712 return false;
|
|
|
713 }
|
|
|
714 }
|
|
|
715 break;
|
|
|
716
|
|
|
717 case 38: /* up arrow */
|
|
|
718 if ( _iOldY > 0 ) {
|
|
|
719 x = _iOldX;
|
|
|
720 y = _iOldY - 1;
|
|
|
721 } else {
|
|
|
722 return false;
|
|
|
723 }
|
|
|
724 break;
|
|
|
725
|
|
|
726 case 9: /* tab */
|
|
|
727 case 39: /* right arrow */
|
|
|
728 if ( _iOldX < iTableWidth-1 ) {
|
|
|
729 x = _iOldX + 1;
|
|
|
730 y = _iOldY;
|
|
|
731 } else if ( _iOldY < iTableHeight-1 ) {
|
|
|
732 x = 0;
|
|
|
733 y = _iOldY + 1;
|
|
|
734 } else {
|
|
|
735 /* at end of table */
|
|
|
736 if ( iKey == 9 && _bForm )
|
|
|
737 {
|
|
|
738 /* If we are in a form, return focus to the 'input' element such that tabbing will
|
|
|
739 * follow correctly in the browser
|
|
|
740 */
|
|
|
741 _bInputFocused = true;
|
|
|
742 _nInput.focus();
|
|
|
743
|
|
|
744 /* This timeout is a little nasty - but IE appears to have some asyhnc behaviour for
|
|
|
745 * focus
|
|
|
746 */
|
|
|
747 setTimeout( function(){ _bInputFocused = false; }, 0 );
|
|
|
748 _bKeyCapture = false;
|
|
|
749 _fnBlur();
|
|
|
750 return true;
|
|
|
751 }
|
|
|
752 else
|
|
|
753 {
|
|
|
754 return false;
|
|
|
755 }
|
|
|
756 }
|
|
|
757 break;
|
|
|
758
|
|
|
759 case 40: /* down arrow */
|
|
|
760 if ( _iOldY < iTableHeight-1 ) {
|
|
|
761 x = _iOldX;
|
|
|
762 y = _iOldY + 1;
|
|
|
763 } else {
|
|
|
764 return false;
|
|
|
765 }
|
|
|
766 break;
|
|
|
767
|
|
|
768 default: /* Nothing we are interested in */
|
|
|
769 return true;
|
|
|
770 }
|
|
|
771
|
|
|
772 _fnSetFocus( _fnCellFromCoords(x, y) );
|
|
|
773 return false;
|
|
|
774 }
|
|
|
775
|
|
|
776
|
|
|
777 /*
|
|
|
778 * Function: _fnCaptureKeys
|
|
|
779 * Purpose: Start capturing key events for this table
|
|
|
780 * Returns: -
|
|
|
781 * Inputs: -
|
|
|
782 */
|
|
|
783 function _fnCaptureKeys( )
|
|
|
784 {
|
|
|
785 if ( !_bKeyCapture )
|
|
|
786 {
|
|
|
787 _bKeyCapture = true;
|
|
|
788 }
|
|
|
789 }
|
|
|
790
|
|
|
791
|
|
|
792 /*
|
|
|
793 * Function: _fnReleaseKeys
|
|
|
794 * Purpose: Stop capturing key events for this table
|
|
|
795 * Returns: -
|
|
|
796 * Inputs: -
|
|
|
797 */
|
|
|
798 function _fnReleaseKeys( )
|
|
|
799 {
|
|
|
800 _bKeyCapture = false;
|
|
|
801 }
|
|
|
802
|
|
|
803
|
|
|
804
|
|
|
805 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
|
|
|
806 * Support functions
|
|
|
807 */
|
|
|
808
|
|
|
809 /*
|
|
|
810 * Function: _fnCellFromCoords
|
|
|
811 * Purpose: Calulate the target TD cell from x and y coordinates
|
|
|
812 * Returns: node: - TD target
|
|
|
813 * Inputs: int:x - x coordinate
|
|
|
814 * int:y - y coordinate
|
|
|
815 */
|
|
|
816 function _fnCellFromCoords( x, y )
|
|
|
817 {
|
|
|
818 if ( _oDatatable )
|
|
|
819 {
|
|
|
820 var oSettings = _oDatatable.fnSettings();
|
|
|
821 if ( typeof oSettings.aoData[ oSettings.aiDisplay[ y ] ] != 'undefined' )
|
|
|
822 {
|
|
|
823 return oSettings.aoData[ oSettings.aiDisplay[ y ] ].nTr.getElementsByTagName('td')[x];
|
|
|
824 }
|
|
|
825 else
|
|
|
826 {
|
|
|
827 return null;
|
|
|
828 }
|
|
|
829 }
|
|
|
830 else
|
|
|
831 {
|
|
|
832 return jQuery('tr:eq('+y+')>td:eq('+x+')', _nBody )[0];
|
|
|
833 }
|
|
|
834 }
|
|
|
835
|
|
|
836
|
|
|
837 /*
|
|
|
838 * Function: _fnCoordsFromCell
|
|
|
839 * Purpose: Calculate the x and y position in a table from a TD cell
|
|
|
840 * Returns: array[2] int: [x, y]
|
|
|
841 * Inputs: node:n - TD cell of interest
|
|
|
842 * Notes: Not actually interested in this for DataTables since it might go out of date
|
|
|
843 */
|
|
|
844 function _fnCoordsFromCell( n )
|
|
|
845 {
|
|
|
846 if ( _oDatatable )
|
|
|
847 {
|
|
|
848 var oSettings = _oDatatable.fnSettings();
|
|
|
849 return [
|
|
|
850 jQuery('td', n.parentNode).index(n),
|
|
|
851 jQuery('tr', n.parentNode.parentNode).index(n.parentNode) + oSettings._iDisplayStart
|
|
|
852 ];
|
|
|
853 }
|
|
|
854 else
|
|
|
855 {
|
|
|
856 return [
|
|
|
857 jQuery('td', n.parentNode).index(n),
|
|
|
858 jQuery('tr', n.parentNode.parentNode).index(n.parentNode)
|
|
|
859 ];
|
|
|
860 }
|
|
|
861 }
|
|
|
862
|
|
|
863
|
|
|
864 /*
|
|
|
865 * Function: _fnSetScrollTop
|
|
|
866 * Purpose: Set the vertical scrolling position
|
|
|
867 * Returns: -
|
|
|
868 * Inputs: int:iPos - scrolltop
|
|
|
869 * Notes: This is so nasty, but without browser detection you can't tell which you should set
|
|
|
870 * So on browsers that support both, the scroll top will be set twice. I can live with
|
|
|
871 * that :-)
|
|
|
872 */
|
|
|
873 function _fnSetScrollTop( iPos )
|
|
|
874 {
|
|
|
875 document.documentElement.scrollTop = iPos;
|
|
|
876 document.body.scrollTop = iPos;
|
|
|
877 }
|
|
|
878
|
|
|
879
|
|
|
880 /*
|
|
|
881 * Function: _fnSetScrollLeft
|
|
|
882 * Purpose: Set the horizontal scrolling position
|
|
|
883 * Returns: -
|
|
|
884 * Inputs: int:iPos - scrollleft
|
|
|
885 */
|
|
|
886 function _fnSetScrollLeft( iPos )
|
|
|
887 {
|
|
|
888 document.documentElement.scrollLeft = iPos;
|
|
|
889 document.body.scrollLeft = iPos;
|
|
|
890 }
|
|
|
891
|
|
|
892
|
|
|
893 /*
|
|
|
894 * Function: _fnGetPos
|
|
|
895 * Purpose: Get the position of an object on the rendered page
|
|
|
896 * Returns: array[2] int: [left, right]
|
|
|
897 * Inputs: node:obj - element of interest
|
|
|
898 */
|
|
|
899 function _fnGetPos ( obj )
|
|
|
900 {
|
|
|
901 var iLeft = 0;
|
|
|
902 var iTop = 0;
|
|
|
903
|
|
|
904 if (obj.offsetParent)
|
|
|
905 {
|
|
|
906 iLeft = obj.offsetLeft;
|
|
|
907 iTop = obj.offsetTop;
|
|
|
908 obj = obj.offsetParent;
|
|
|
909 while (obj)
|
|
|
910 {
|
|
|
911 iLeft += obj.offsetLeft;
|
|
|
912 iTop += obj.offsetTop;
|
|
|
913 obj = obj.offsetParent;
|
|
|
914 }
|
|
|
915 }
|
|
|
916 return [iLeft,iTop];
|
|
|
917 }
|
|
|
918
|
|
|
919
|
|
|
920 /*
|
|
|
921 * Function: _fnFindDtCell
|
|
|
922 * Purpose: Get the coords. of a cell from the DataTables internal information
|
|
|
923 * Returns: array[2] int: [x, y] coords. or null if not found
|
|
|
924 * Inputs: node:nTarget - the node of interest
|
|
|
925 */
|
|
|
926 function _fnFindDtCell( nTarget )
|
|
|
927 {
|
|
|
928 var oSettings = _oDatatable.fnSettings();
|
|
|
929 for ( var i=0, iLen=oSettings.aiDisplay.length ; i<iLen ; i++ )
|
|
|
930 {
|
|
|
931 var nTr = oSettings.aoData[ oSettings.aiDisplay[i] ].nTr;
|
|
|
932 var nTds = nTr.getElementsByTagName('td');
|
|
|
933 for ( var j=0, jLen=nTds.length ; j<jLen ; j++ )
|
|
|
934 {
|
|
|
935 if ( nTds[j] == nTarget )
|
|
|
936 {
|
|
|
937 return [ j, i ];
|
|
|
938 }
|
|
|
939 }
|
|
|
940 }
|
|
|
941 return null;
|
|
|
942 }
|
|
|
943
|
|
|
944
|
|
|
945
|
|
|
946 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
|
|
|
947 * Initialisation
|
|
|
948 */
|
|
|
949
|
|
|
950 /*
|
|
|
951 * Function: _fnInit
|
|
|
952 * Purpose: Initialise the KeyTable
|
|
|
953 * Returns: -
|
|
|
954 * Inputs: object:oInit - optional - Initalisation object with the following parameters:
|
|
|
955 * array[2] int:focus - x and y coordinates of the initial target
|
|
|
956 * or
|
|
|
957 * node:focus - the node to set initial focus on
|
|
|
958 * node:table - the table to use, if not given, first table with class 'KeyTable' will be used
|
|
|
959 * string:focusClass - focusing class to give to table elements
|
|
|
960 * object:that - focus
|
|
|
961 * bool:initScroll - scroll the view port on load, default true
|
|
|
962 * int:tabIndex - the tab index to give the hidden input element
|
|
|
963 */
|
|
|
964 function _fnInit( oInit, that )
|
|
|
965 {
|
|
|
966 /* Save scope */
|
|
|
967 _that = that;
|
|
|
968
|
|
|
969 /* Capture undefined initialisation and apply the defaults */
|
|
|
970 if ( typeof oInit == 'undefined' ) {
|
|
|
971 oInit = {};
|
|
|
972 }
|
|
|
973
|
|
|
974 if ( typeof oInit.focus == 'undefined' ) {
|
|
|
975 oInit.focus = [0,0];
|
|
|
976 }
|
|
|
977
|
|
|
978 if ( typeof oInit.table == 'undefined' ) {
|
|
|
979 oInit.table = jQuery('table.KeyTable')[0];
|
|
|
980 } else {
|
|
|
981 $(oInit.table).addClass('KeyTable');
|
|
|
982 }
|
|
|
983
|
|
|
984 if ( typeof oInit.focusClass != 'undefined' ) {
|
|
|
985 _sFocusClass = oInit.focusClass;
|
|
|
986 }
|
|
|
987
|
|
|
988 if ( typeof oInit.datatable != 'undefined' ) {
|
|
|
989 _oDatatable = oInit.datatable;
|
|
|
990 }
|
|
|
991
|
|
|
992 if ( typeof oInit.initScroll == 'undefined' ) {
|
|
|
993 oInit.initScroll = true;
|
|
|
994 }
|
|
|
995
|
|
|
996 if ( typeof oInit.form == 'undefined' ) {
|
|
|
997 oInit.form = false;
|
|
|
998 }
|
|
|
999 _bForm = oInit.form;
|
|
|
1000
|
|
|
1001 /* Cache the tbody node of interest */
|
|
|
1002 _nBody = oInit.table.getElementsByTagName('tbody')[0];
|
|
|
1003
|
|
|
1004 /* If the table is inside a form, then we need a hidden input box which can be used by the
|
|
|
1005 * browser to catch the browser tabbing for our table
|
|
|
1006 */
|
|
|
1007 if ( _bForm )
|
|
|
1008 {
|
|
|
1009 var nDiv = document.createElement('div');
|
|
|
1010 _nInput = document.createElement('input');
|
|
|
1011 nDiv.style.height = "1px"; /* Opera requires a little something */
|
|
|
1012 nDiv.style.width = "0px";
|
|
|
1013 nDiv.style.overflow = "hidden";
|
|
|
1014 if ( typeof oInit.tabIndex != 'undefined' )
|
|
|
1015 {
|
|
|
1016 _nInput.tabIndex = oInit.tabIndex;
|
|
|
1017 }
|
|
|
1018 nDiv.appendChild(_nInput);
|
|
|
1019 oInit.table.parentNode.insertBefore( nDiv, oInit.table.nextSibling );
|
|
|
1020
|
|
|
1021 jQuery(_nInput).focus( function () {
|
|
|
1022 /* See if we want to 'tab into' the table or out */
|
|
|
1023 if ( !_bInputFocused )
|
|
|
1024 {
|
|
|
1025 _bKeyCapture = true;
|
|
|
1026 _bInputFocused = false;
|
|
|
1027 if ( typeof oInit.focus.nodeName != "undefined" )
|
|
|
1028 {
|
|
|
1029 _fnSetFocus( oInit.focus, oInit.initScroll );
|
|
|
1030 }
|
|
|
1031 else
|
|
|
1032 {
|
|
|
1033 _fnSetFocus( _fnCellFromCoords( oInit.focus[0], oInit.focus[1]), oInit.initScroll );
|
|
|
1034 }
|
|
|
1035
|
|
|
1036 /* Need to interup the thread for this to work */
|
|
|
1037 setTimeout( function() { _nInput.blur(); }, 0 );
|
|
|
1038 }
|
|
|
1039 } );
|
|
|
1040 _bKeyCapture = false;
|
|
|
1041 }
|
|
|
1042 else
|
|
|
1043 {
|
|
|
1044 /* Set the initial focus on the table */
|
|
|
1045 if ( typeof oInit.focus.nodeName != "undefined" )
|
|
|
1046 {
|
|
|
1047 _fnSetFocus( oInit.focus, oInit.initScroll );
|
|
|
1048 }
|
|
|
1049 else
|
|
|
1050 {
|
|
|
1051 _fnSetFocus( _fnCellFromCoords( oInit.focus[0], oInit.focus[1]), oInit.initScroll );
|
|
|
1052 }
|
|
|
1053 _fnCaptureKeys();
|
|
|
1054 }
|
|
|
1055
|
|
|
1056 /*
|
|
|
1057 * Add event listeners
|
|
|
1058 * Well - I hate myself for doing this, but it would appear that key events in browsers are
|
|
|
1059 * a complete mess, particulay when you consider arrow keys, which of course are one of the
|
|
|
1060 * main areas of interest here. So basically for arrow keys, there is no keypress event in
|
|
|
1061 * Safari and IE, while there is in Firefox and Opera. But Firefox and Opera don't repeat the
|
|
|
1062 * keydown event for an arrow key. OUCH. See the following two articles for more:
|
|
|
1063 * http://www.quirksmode.org/dom/events/keys.html
|
|
|
1064 * https://lists.webkit.org/pipermail/webkit-dev/2007-December/002992.html
|
|
|
1065 * http://unixpapa.com/js/key.html
|
|
|
1066 * PPK considers the IE / Safari method correct (good enough for me!) so we (urgh) detect
|
|
|
1067 * Mozilla and Opera and apply keypress for them, while everything else gets keydown. If
|
|
|
1068 * Mozilla or Opera change their implemention in future, this will need to be updated...
|
|
|
1069 * although at the time of writing (14th March 2009) Minefield still uses the 3.0 behaviour.
|
|
|
1070 */
|
|
|
1071 if ( jQuery.browser.mozilla || jQuery.browser.opera )
|
|
|
1072 {
|
|
|
1073 jQuery(document).bind( "keypress", _fnKey );
|
|
|
1074 }
|
|
|
1075 else
|
|
|
1076 {
|
|
|
1077 jQuery(document).bind( "keydown", _fnKey );
|
|
|
1078 }
|
|
|
1079
|
|
|
1080 if ( _oDatatable )
|
|
|
1081 {
|
|
|
1082 jQuery('tbody td', _oDatatable.fnSettings().nTable).live( 'click', _fnClick );
|
|
|
1083 }
|
|
|
1084 else
|
|
|
1085 {
|
|
|
1086 jQuery('td', _nBody).live( 'click', _fnClick );
|
|
|
1087 }
|
|
|
1088
|
|
|
1089 /* Loose table focus when click outside the table */
|
|
|
1090 jQuery(document).click( function(e) {
|
|
|
1091 var nTarget = e.target;
|
|
|
1092 var bTableClick = false;
|
|
|
1093 while ( nTarget )
|
|
|
1094 {
|
|
|
1095 if ( nTarget == oInit.table )
|
|
|
1096 {
|
|
|
1097 bTableClick = true;
|
|
|
1098 break;
|
|
|
1099 }
|
|
|
1100 nTarget = nTarget.parentNode;
|
|
|
1101 }
|
|
|
1102 if ( !bTableClick )
|
|
|
1103 {
|
|
|
1104 _fnBlur();
|
|
|
1105 }
|
|
|
1106 } );
|
|
|
1107 }
|
|
|
1108
|
|
|
1109 /* Initialise our new object */
|
|
|
1110 _fnInit( oInit, this );
|
|
|
1111 }
|
