1 | /*! |
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2 | * Ext JS Library 3.0.0 |
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3 | * Copyright(c) 2006-2009 Ext JS, LLC |
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4 | * licensing@extjs.com |
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5 | * http://www.extjs.com/license |
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6 | */ |
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7 | /** |
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8 | * @class Ext.DomHelper |
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9 | * <p>The DomHelper class provides a layer of abstraction from DOM and transparently supports creating |
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10 | * elements via DOM or using HTML fragments. It also has the ability to create HTML fragment templates |
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11 | * from your DOM building code.</p> |
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12 | * |
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13 | * <p><b><u>DomHelper element specification object</u></b></p> |
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14 | * <p>A specification object is used when creating elements. Attributes of this object |
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15 | * are assumed to be element attributes, except for 4 special attributes: |
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16 | * <div class="mdetail-params"><ul> |
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17 | * <li><b><tt>tag</tt></b> : <div class="sub-desc">The tag name of the element</div></li> |
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18 | * <li><b><tt>children</tt></b> : or <tt>cn</tt><div class="sub-desc">An array of the |
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19 | * same kind of element definition objects to be created and appended. These can be nested |
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20 | * as deep as you want.</div></li> |
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21 | * <li><b><tt>cls</tt></b> : <div class="sub-desc">The class attribute of the element. |
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22 | * This will end up being either the "class" attribute on a HTML fragment or className |
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23 | * for a DOM node, depending on whether DomHelper is using fragments or DOM.</div></li> |
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24 | * <li><b><tt>html</tt></b> : <div class="sub-desc">The innerHTML for the element</div></li> |
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25 | * </ul></div></p> |
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26 | * |
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27 | * <p><b><u>Insertion methods</u></b></p> |
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28 | * <p>Commonly used insertion methods: |
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29 | * <div class="mdetail-params"><ul> |
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30 | * <li><b><tt>{@link #append}</tt></b> : <div class="sub-desc"></div></li> |
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31 | * <li><b><tt>{@link #insertBefore}</tt></b> : <div class="sub-desc"></div></li> |
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32 | * <li><b><tt>{@link #insertAfter}</tt></b> : <div class="sub-desc"></div></li> |
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33 | * <li><b><tt>{@link #overwrite}</tt></b> : <div class="sub-desc"></div></li> |
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34 | * <li><b><tt>{@link #createTemplate}</tt></b> : <div class="sub-desc"></div></li> |
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35 | * <li><b><tt>{@link #insertHtml}</tt></b> : <div class="sub-desc"></div></li> |
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36 | * </ul></div></p> |
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37 | * |
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38 | * <p><b><u>Example</u></b></p> |
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39 | * <p>This is an example, where an unordered list with 3 children items is appended to an existing |
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40 | * element with id <tt>'my-div'</tt>:<br> |
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41 | <pre><code> |
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42 | var dh = Ext.DomHelper; // create shorthand alias |
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43 | // specification object |
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44 | var spec = { |
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45 | id: 'my-ul', |
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46 | tag: 'ul', |
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47 | cls: 'my-list', |
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48 | // append children after creating |
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49 | children: [ // may also specify 'cn' instead of 'children' |
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50 | {tag: 'li', id: 'item0', html: 'List Item 0'}, |
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51 | {tag: 'li', id: 'item1', html: 'List Item 1'}, |
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52 | {tag: 'li', id: 'item2', html: 'List Item 2'} |
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53 | ] |
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54 | }; |
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55 | var list = dh.append( |
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56 | 'my-div', // the context element 'my-div' can either be the id or the actual node |
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57 | spec // the specification object |
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58 | ); |
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59 | </code></pre></p> |
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60 | * <p>Element creation specification parameters in this class may also be passed as an Array of |
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61 | * specification objects. This can be used to insert multiple sibling nodes into an existing |
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62 | * container very efficiently. For example, to add more list items to the example above:<pre><code> |
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63 | dh.append('my-ul', [ |
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64 | {tag: 'li', id: 'item3', html: 'List Item 3'}, |
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65 | {tag: 'li', id: 'item4', html: 'List Item 4'} |
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66 | ]); |
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67 | * </code></pre></p> |
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68 | * |
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69 | * <p><b><u>Templating</u></b></p> |
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70 | * <p>The real power is in the built-in templating. Instead of creating or appending any elements, |
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71 | * <tt>{@link #createTemplate}</tt> returns a Template object which can be used over and over to |
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72 | * insert new elements. Revisiting the example above, we could utilize templating this time: |
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73 | * <pre><code> |
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74 | // create the node |
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75 | var list = dh.append('my-div', {tag: 'ul', cls: 'my-list'}); |
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76 | // get template |
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77 | var tpl = dh.createTemplate({tag: 'li', id: 'item{0}', html: 'List Item {0}'}); |
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78 | |
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79 | for(var i = 0; i < 5, i++){ |
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80 | tpl.append(list, [i]); // use template to append to the actual node |
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81 | } |
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82 | * </code></pre></p> |
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83 | * <p>An example using a template:<pre><code> |
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84 | var html = '<a id="{0}" href="{1}" class="nav">{2}</a>'; |
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85 | |
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86 | var tpl = new Ext.DomHelper.createTemplate(html); |
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87 | tpl.append('blog-roll', ['link1', 'http://www.jackslocum.com/', "Jack's Site"]); |
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88 | tpl.append('blog-roll', ['link2', 'http://www.dustindiaz.com/', "Dustin's Site"]); |
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89 | * </code></pre></p> |
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90 | * |
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91 | * <p>The same example using named parameters:<pre><code> |
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92 | var html = '<a id="{id}" href="{url}" class="nav">{text}</a>'; |
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93 | |
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94 | var tpl = new Ext.DomHelper.createTemplate(html); |
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95 | tpl.append('blog-roll', { |
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96 | id: 'link1', |
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97 | url: 'http://www.jackslocum.com/', |
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98 | text: "Jack's Site" |
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99 | }); |
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100 | tpl.append('blog-roll', { |
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101 | id: 'link2', |
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102 | url: 'http://www.dustindiaz.com/', |
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103 | text: "Dustin's Site" |
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104 | }); |
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105 | * </code></pre></p> |
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106 | * |
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107 | * <p><b><u>Compiling Templates</u></b></p> |
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108 | * <p>Templates are applied using regular expressions. The performance is great, but if |
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109 | * you are adding a bunch of DOM elements using the same template, you can increase |
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110 | * performance even further by {@link Ext.Template#compile "compiling"} the template. |
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111 | * The way "{@link Ext.Template#compile compile()}" works is the template is parsed and |
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112 | * broken up at the different variable points and a dynamic function is created and eval'ed. |
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113 | * The generated function performs string concatenation of these parts and the passed |
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114 | * variables instead of using regular expressions. |
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115 | * <pre><code> |
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116 | var html = '<a id="{id}" href="{url}" class="nav">{text}</a>'; |
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117 | |
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118 | var tpl = new Ext.DomHelper.createTemplate(html); |
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119 | tpl.compile(); |
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120 | |
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121 | //... use template like normal |
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122 | * </code></pre></p> |
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123 | * |
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124 | * <p><b><u>Performance Boost</u></b></p> |
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125 | * <p>DomHelper will transparently create HTML fragments when it can. Using HTML fragments instead |
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126 | * of DOM can significantly boost performance.</p> |
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127 | * <p>Element creation specification parameters may also be strings. If {@link #useDom} is <tt>false</tt>, |
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128 | * then the string is used as innerHTML. If {@link #useDom} is <tt>true</tt>, a string specification |
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129 | * results in the creation of a text node. Usage:</p> |
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130 | * <pre><code> |
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131 | Ext.DomHelper.useDom = true; // force it to use DOM; reduces performance |
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132 | * </code></pre> |
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133 | * @singleton |
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134 | */ |
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135 | Ext.DomHelper = function(){ |
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136 | var tempTableEl = null, |
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137 | emptyTags = /^(?:br|frame|hr|img|input|link|meta|range|spacer|wbr|area|param|col)$/i, |
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138 | tableRe = /^table|tbody|tr|td$/i, |
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139 | pub, |
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140 | // kill repeat to save bytes |
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141 | afterbegin = "afterbegin", |
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142 | afterend = "afterend", |
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143 | beforebegin = "beforebegin", |
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144 | beforeend = "beforeend", |
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145 | ts = '<table>', |
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146 | te = '</table>', |
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147 | tbs = ts+'<tbody>', |
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148 | tbe = '</tbody>'+te, |
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149 | trs = tbs + '<tr>', |
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150 | tre = '</tr>'+tbe; |
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151 | |
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152 | // private |
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153 | function doInsert(el, o, returnElement, pos, sibling, append){ |
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154 | var newNode = pub.insertHtml(pos, Ext.getDom(el), createHtml(o)); |
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155 | return returnElement ? Ext.get(newNode, true) : newNode; |
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156 | } |
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157 | |
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158 | // build as innerHTML where available |
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159 | function createHtml(o){ |
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160 | var b = "", |
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161 | attr, |
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162 | val, |
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163 | key, |
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164 | keyVal, |
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165 | cn; |
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166 | |
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167 | if(typeof o == 'string'){ |
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168 | b = o; |
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169 | } else if (Ext.isArray(o)) { |
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170 | Ext.each(o, function(v) { |
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171 | b += createHtml(v); |
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172 | }); |
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173 | } else { |
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174 | b += "<" + (o.tag = o.tag || "div"); |
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175 | Ext.iterate(o, function(attr, val){ |
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176 | if(!/tag|children|cn|html$/i.test(attr)){ |
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177 | if (Ext.isObject(val)) { |
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178 | b += " " + attr + "='"; |
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179 | Ext.iterate(val, function(key, keyVal){ |
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180 | b += key + ":" + keyVal + ";"; |
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181 | }); |
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182 | b += "'"; |
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183 | }else{ |
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184 | b += " " + ({cls : "class", htmlFor : "for"}[attr] || attr) + "='" + val + "'"; |
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185 | } |
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186 | } |
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187 | }); |
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188 | // Now either just close the tag or try to add children and close the tag. |
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189 | if (emptyTags.test(o.tag)) { |
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190 | b += "/>"; |
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191 | } else { |
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192 | b += ">"; |
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193 | if ((cn = o.children || o.cn)) { |
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194 | b += createHtml(cn); |
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195 | } else if(o.html){ |
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196 | b += o.html; |
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197 | } |
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198 | b += "</" + o.tag + ">"; |
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199 | } |
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200 | } |
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201 | return b; |
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202 | } |
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203 | |
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204 | function ieTable(depth, s, h, e){ |
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205 | tempTableEl.innerHTML = [s, h, e].join(''); |
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206 | var i = -1, |
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207 | el = tempTableEl; |
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208 | while(++i < depth){ |
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209 | el = el.firstChild; |
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210 | } |
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211 | return el; |
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212 | } |
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213 | |
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214 | /** |
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215 | * @ignore |
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216 | * Nasty code for IE's broken table implementation |
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217 | */ |
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218 | function insertIntoTable(tag, where, el, html) { |
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219 | var node, |
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220 | before; |
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221 | |
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222 | tempTableEl = tempTableEl || document.createElement('div'); |
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223 | |
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224 | if(tag == 'td' && (where == afterbegin || where == beforeend) || |
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225 | !/td|tr|tbody/i.test(tag) && (where == beforebegin || where == afterend)) { |
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226 | return; |
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227 | } |
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228 | before = where == beforebegin ? el : |
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229 | where == afterend ? el.nextSibling : |
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230 | where == afterbegin ? el.firstChild : null; |
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231 | |
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232 | if (where == beforebegin || where == afterend) { |
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233 | el = el.parentNode; |
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234 | } |
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235 | |
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236 | if (tag == 'td' || (tag == "tr" && (where == beforeend || where == afterbegin))) { |
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237 | node = ieTable(4, trs, html, tre); |
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238 | } else if ((tag == "tbody" && (where == beforeend || where == afterbegin)) || |
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239 | (tag == "tr" && (where == beforebegin || where == afterend))) { |
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240 | node = ieTable(3, tbs, html, tbe); |
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241 | } else { |
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242 | node = ieTable(2, ts, html, te); |
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243 | } |
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244 | el.insertBefore(node, before); |
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245 | return node; |
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246 | } |
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247 | |
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248 | |
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249 | pub = { |
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250 | /** |
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251 | * Returns the markup for the passed Element(s) config. |
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252 | * @param {Object} o The DOM object spec (and children) |
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253 | * @return {String} |
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254 | */ |
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255 | markup : function(o){ |
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256 | return createHtml(o); |
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257 | }, |
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258 | |
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259 | /** |
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260 | * Inserts an HTML fragment into the DOM. |
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261 | * @param {String} where Where to insert the html in relation to el - beforeBegin, afterBegin, beforeEnd, afterEnd. |
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262 | * @param {HTMLElement} el The context element |
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263 | * @param {String} html The HTML fragmenet |
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264 | * @return {HTMLElement} The new node |
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265 | */ |
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266 | insertHtml : function(where, el, html){ |
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267 | var hash = {}, |
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268 | hashVal, |
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269 | setStart, |
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270 | range, |
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271 | frag, |
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272 | rangeEl, |
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273 | rs; |
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274 | |
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275 | where = where.toLowerCase(); |
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276 | // add these here because they are used in both branches of the condition. |
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277 | hash[beforebegin] = ['BeforeBegin', 'previousSibling']; |
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278 | hash[afterend] = ['AfterEnd', 'nextSibling']; |
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279 | |
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280 | if (el.insertAdjacentHTML) { |
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281 | if(tableRe.test(el.tagName) && (rs = insertIntoTable(el.tagName.toLowerCase(), where, el, html))){ |
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282 | return rs; |
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283 | } |
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284 | // add these two to the hash. |
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285 | hash[afterbegin] = ['AfterBegin', 'firstChild']; |
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286 | hash[beforeend] = ['BeforeEnd', 'lastChild']; |
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287 | if ((hashVal = hash[where])) { |
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288 | el.insertAdjacentHTML(hashVal[0], html); |
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289 | return el[hashVal[1]]; |
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290 | } |
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291 | } else { |
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292 | range = el.ownerDocument.createRange(); |
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293 | setStart = "setStart" + (/end/i.test(where) ? "After" : "Before"); |
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294 | if (hash[where]) { |
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295 | range[setStart](el); |
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296 | frag = range.createContextualFragment(html); |
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297 | el.parentNode.insertBefore(frag, where == beforebegin ? el : el.nextSibling); |
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298 | return el[(where == beforebegin ? "previous" : "next") + "Sibling"]; |
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299 | } else { |
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300 | rangeEl = (where == afterbegin ? "first" : "last") + "Child"; |
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301 | if (el.firstChild) { |
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302 | range[setStart](el[rangeEl]); |
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303 | frag = range.createContextualFragment(html); |
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304 | if(where == afterbegin){ |
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305 | el.insertBefore(frag, el.firstChild); |
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306 | }else{ |
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307 | el.appendChild(frag); |
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308 | } |
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309 | } else { |
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310 | el.innerHTML = html; |
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311 | } |
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312 | return el[rangeEl]; |
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313 | } |
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314 | } |
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315 | throw 'Illegal insertion point -> "' + where + '"'; |
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316 | }, |
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317 | |
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318 | /** |
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319 | * Creates new DOM element(s) and inserts them before el. |
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320 | * @param {Mixed} el The context element |
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321 | * @param {Object/String} o The DOM object spec (and children) or raw HTML blob |
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322 | * @param {Boolean} returnElement (optional) true to return a Ext.Element |
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323 | * @return {HTMLElement/Ext.Element} The new node |
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324 | */ |
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325 | insertBefore : function(el, o, returnElement){ |
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326 | return doInsert(el, o, returnElement, beforebegin); |
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327 | }, |
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328 | |
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329 | /** |
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330 | * Creates new DOM element(s) and inserts them after el. |
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331 | * @param {Mixed} el The context element |
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332 | * @param {Object} o The DOM object spec (and children) |
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333 | * @param {Boolean} returnElement (optional) true to return a Ext.Element |
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334 | * @return {HTMLElement/Ext.Element} The new node |
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335 | */ |
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336 | insertAfter : function(el, o, returnElement){ |
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337 | return doInsert(el, o, returnElement, afterend, "nextSibling"); |
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338 | }, |
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339 | |
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340 | /** |
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341 | * Creates new DOM element(s) and inserts them as the first child of el. |
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342 | * @param {Mixed} el The context element |
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343 | * @param {Object/String} o The DOM object spec (and children) or raw HTML blob |
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344 | * @param {Boolean} returnElement (optional) true to return a Ext.Element |
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345 | * @return {HTMLElement/Ext.Element} The new node |
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346 | */ |
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347 | insertFirst : function(el, o, returnElement){ |
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348 | return doInsert(el, o, returnElement, afterbegin, "firstChild"); |
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349 | }, |
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350 | |
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351 | /** |
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352 | * Creates new DOM element(s) and appends them to el. |
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353 | * @param {Mixed} el The context element |
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354 | * @param {Object/String} o The DOM object spec (and children) or raw HTML blob |
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355 | * @param {Boolean} returnElement (optional) true to return a Ext.Element |
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356 | * @return {HTMLElement/Ext.Element} The new node |
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357 | */ |
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358 | append : function(el, o, returnElement){ |
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359 | return doInsert(el, o, returnElement, beforeend, "", true); |
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360 | }, |
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361 | |
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362 | /** |
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363 | * Creates new DOM element(s) and overwrites the contents of el with them. |
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364 | * @param {Mixed} el The context element |
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365 | * @param {Object/String} o The DOM object spec (and children) or raw HTML blob |
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366 | * @param {Boolean} returnElement (optional) true to return a Ext.Element |
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367 | * @return {HTMLElement/Ext.Element} The new node |
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368 | */ |
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369 | overwrite : function(el, o, returnElement){ |
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370 | el = Ext.getDom(el); |
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371 | el.innerHTML = createHtml(o); |
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372 | return returnElement ? Ext.get(el.firstChild) : el.firstChild; |
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373 | }, |
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374 | |
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375 | createHtml : createHtml |
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376 | }; |
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377 | return pub; |
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378 | }(); |
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