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<?php
/**
* CAutoComplete class file.
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @link http://www.yiiframework.com/
* @copyright Copyright © 2008-2009 Yii Software LLC
* @license http://www.yiiframework.com/license/
*/
/**
* CAutoComplete generates an auto-complete text field.
*
* CAutoComplete is based on the {@link http://plugins.jquery.com/project/autocompletex jQuery Autocomplete}.
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @version $Id: CAutoComplete.php 1416 2009-09-17 18:33:22Z istvan.beregszaszi $
* @package system.web.widgets
* @since 1.0
*/
class CAutoComplete extends CInputWidget
{
/**
* @var boolean whether to show the autocomplete using a text area. Defaults to false,
* meaning a text field is used.
* @since 1.0.4
*/
public $textArea=false;
/**
* @var array data that would be saved as client-side data to provide candidate selections.
* Each array element can be string or an associative array.
* The {@link url} property will be ignored if this property is set.
* @see url
*/
public $data;
/**
* @var string|array the URL that can return the candidate selections.
* A 'q' GET parameter will be sent with the URL which contains what the user has entered so far.
* If the URL is given as an array, it is considered as a route to a controller action and will
* be used to generate a URL using {@link CController::createUrl};
* If the URL is an empty string, the currently requested URL is used.
* This property will be ignored if {@link data} is set.
* @see data
*/
public $url='';
/**
* @var mixed the CSS file used for the widget. Defaults to null, meaning
* using the default CSS file included together with the widget.
* If false, no CSS file will be used. Otherwise, the specified CSS file
* will be included when using this widget.
*/
public $cssFile;
/**
* @var integer the minimum number of characters a user has to type before
* the autocompleter activates. Defaults to 1.
*/
public $minChars;
/**
* @var integer the delay in milliseconds the autocompleter waits after
* a keystroke to activate itself. Defaults to 400.
*/
public $delay;
/**
* @var integer the number of backend query results to store in cache.
* If set to 1 (the current result), no caching will happen. Must be >= 1. Defaults to 10.
*/
public $cacheLength;
/**
* @var boolean whether or not the autocompleter can use a cache for more
* specific queries. This means that all matches of "foot" are a subset
* of all matches for "foo". Usually this is true, and using this options
* decreases server load and increases performance. Only useful with
* cacheLength settings bigger than one, like 10. Defaults to true.
*/
public $matchSubset;
/**
* @var boolean whether or not the comparison is case sensitive. Important
* only if you use caching. Defaults to false.
*/
public $matchCase;
/**
* @var boolean whether or not the comparison looks inside
* (i.e. does "ba" match "foo bar") the search results. Important only if
* you use caching. Don't mix with autofill. Defaults to false.
*/
public $matchContains;
/**
* @var boolean if set to true, the autocompleter will only allow results that
* are presented by the backend. Note that illegal values result in an empty
* input box. Defaults to false.
*/
public $mustMatch;
/**
* @var boolean if this is set to true, the first autocomplete value will
* be automatically selected on tab/return, even if it has not been handpicked
* by keyboard or mouse action. If there is a handpicked (highlighted) result,
* that result will take precedence. Defaults to true.
*/
public $selectFirst;
/**
* @var array extra parameters for the backend. If you were to specify
* array('bar'=>4), the autocompleter would call the backend with a GET
* parameter 'bar' 4. The param can be a function that is called to calculate
* the param before each request.
*/
public $extraParams;
/**
* @var string a javascript function that provides advanced markup for an item.
* For each row of results, this function will be called. The returned value will
* be displayed inside an LI element in the results list. Autocompleter will
* provide 4 parameters: the results row, the position of the row in the list of
* results (starting at 1), the number of items in the list of results and the search term.
* The default behavior assumes that a single row contains a single value.
*/
public $formatItem;
/**
* @var string a javascript function that can be used to limit the data that autocomplete
* searches for matches. For example, there may be items you want displayed to the user,
* but don't want included in the data that's searched. The function is called with the same arguments
* as {@link formatItem}. Defaults to formatItem.
*/
public $formatMatch;
/**
* @var string a javascript function that provides the formatting for the value to be
* put into the input field. Again three arguments: Data, position (starting with one) and
* total number of data. The default behavior assumes either plain data to use as result
* or uses the same value as provided by formatItem.
*/
public $formatResult;
/**
* @var boolean whether to allow more than one autocompleted-value to enter. Defaults to false.
*/
public $multiple;
/**
* @var string seperator to put between values when using multiple option. Defaults to ", ".
*/
public $multipleSeparator;
/**
* @var integer specify a custom width for the select box. Defaults to the width of the input element.
*/
public $width;
/**
* @var boolean fill the textinput while still selecting a value, replacing the value
* if more is typed or something else is selected. Defaults to false.
*/
public $autoFill;
/**
* @var integer limit the number of items in the select box. Is also sent as
* a "limit" parameter with a remote request. Defaults to 10.
*/
public $max;
/**
* @var boolean|string Whether and how to highlight matches in the select box.
* Set to false to disable. Set to a javascript function to customize.
* The function gets the value as the first argument and the search term as the
* second and must return the formatted value. Defaults to Wraps the search term in a <strong> element.
*/
public $highlight;
/**
* @var boolean whether to scroll when more results than configured via scrollHeight are available. Defaults to true.
*/
public $scroll;
/**
* @var integer height of scrolled autocomplete control in pixels. Defaults to 180.
*/
public $scrollHeight;
/**
* @var string the CSS class for the input element. Defaults to "ac_input".
*/
public $inputClass;
/**
* @var string the CSS class for the dropdown list. Defaults to "ac_results".
*/
public $resultsClass;
/**
* @var string the CSS class used when the data is being loaded from backend. Defaults to "ac_loading".
*/
public $loadingClass;
/**
* @var array additional options that can be passed to the constructor of the autocomplete js object.
* This allows you to override existing functions of the autocomplete js class (e.g. the parse() function)
*
* If you want to provide JavaScript native code, you have to prefix the string with js: otherwise it will
* be enclosed by quotes.
*/
public $options=array();
/**
* @var string the chain of method calls that would be appended at the end of the autocomplete constructor.
* For example, ".result(function(...){})" would cause the specified js function to execute
* when the user selects an option.
*/
public $methodChain;
/**
* Initializes the widget.
* This method registers all needed client scripts and renders
* the autocomplete input.
*/
public function init()
{
list($name,$id)=$this->resolveNameID();
if(!isset($this->htmlOptions['id']))
$this->htmlOptions['id']=$id;
if(!isset($this->htmlOptions['name']))
$this->htmlOptions['name']=$name;
$this->registerClientScript();
if($this->hasModel())
{
$field=$this->textArea ? 'activeTextArea' : 'activeTextField';
echo CHtml::$field($this->model,$this->attribute,$this->htmlOptions);
}
else
{
$field=$this->textArea ? 'textArea' : 'textField';
echo CHtml::$field($name,$this->value,$this->htmlOptions);
}
}
/**
* Registers the needed CSS and JavaScript.
* @since 1.0.1
*/
public function registerClientScript()
{
$id=$this->htmlOptions['id'];
$acOptions=$this->getClientOptions();
$options=$acOptions===array()?'{}' : CJavaScript::encode($acOptions);
$cs=Yii::app()->getClientScript();
$cs->registerCoreScript('autocomplete');
if($this->data!==null)
$data=CJavaScript::encode($this->data);
else
{
$url=CHtml::normalizeUrl($this->url);
$data='"'.$url.'"';
}
$cs->registerScript('Yii.CAutoComplete#'.$id,"jQuery(\"#{$id}\").autocomplete($data,{$options}){$this->methodChain};");
if($this->cssFile!==false)
self::registerCssFile($this->cssFile);
}
/**
* Registers the needed CSS file.
* @param string the CSS URL. If null, a default CSS URL will be used.
* @since 1.0.2
*/
public static function registerCssFile($url=null)
{
$cs=Yii::app()->getClientScript();
if($url===null)
$url=$cs->getCoreScriptUrl().'/autocomplete/jquery.autocomplete.css';
$cs->registerCssFile($url);
}
/**
* @return array the javascript options
*/
protected function getClientOptions()
{
static $properties=array(
'minChars', 'delay', 'cacheLength', 'matchSubset',
'matchCase', 'matchContains', 'mustMatch', 'selectFirst',
'extraParams', 'multiple', 'multipleSeparator', 'width',
'autoFill', 'max', 'scroll', 'scrollHeight', 'inputClass',
'formatItem', 'formatMatch', 'formatResult', 'highlight',
'resultsClass', 'loadingClass');
static $functions=array('formatItem', 'formatMatch', 'formatResult', 'highlight');
$options=$this->options;
foreach($properties as $property)
{
if($this->$property!==null)
$options[$property]=$this->$property;
}
foreach($functions as $func)
{
if(is_string($this->$func) && strncmp($this->$func,'js:',3))
$options[$func]='js:'.$this->$func;
}
return $options;
}
}