* Prado 3.3.0

1 files changed, 438 insertions, 0 deletions

diff --git a/lib/prado/framework/Web/UI/ActiveControls/TAutoComplete.php b/lib/prado/framework/Web/UI/ActiveControls/TAutoComplete.php
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+<?php
+/**
+ * TAutoComplete class file.
+ *
+ * @author Wei Zhuo <weizhuo[at]gamil[dot]com>
+ * @link https://github.com/pradosoft/prado
+ * @copyright Copyright &copy; 2005-2015 The PRADO Group
+ * @license https://github.com/pradosoft/prado/blob/master/COPYRIGHT
+ * @package System.Web.UI.ActiveControls
+ */
+
+/**
+ * Load active text box.
+ */
+Prado::using('System.Web.UI.ActiveControls.TActiveTextBox');
+Prado::using('System.Web.UI.ActiveControls.TCallbackEventParameter');
+
+/**
+ * TAutoComplete class.
+ *
+ * TAutoComplete is a textbox that provides a list of suggestion on
+ * the current partial word typed in the textbox. The suggestions are
+ * requested using callbacks, and raises the {@link onSuggestion OnSuggestion}
+ * event. The events of the TActiveText (from which TAutoComplete is extended from)
+ * and {@link onSuggestion OnSuggestion} are mutually exculsive. That is,
+ * if {@link onTextChange OnTextChange} and/or {@link onCallback OnCallback}
+ * events are raise, then {@link onSuggestion OnSuggestion} will not be raise, and
+ * vice versa.
+ *
+ * The list of suggestions should be set in the {@link onSuggestion OnSuggestion}
+ * event handler. The partial word to match the suggestion is in the
+ * {@link TCallbackEventParameter::getCallbackParameter TCallbackEventParameter::CallbackParameter}
+ * property. The datasource of the TAutoComplete must be set using {@link setDataSource}
+ * method. This sets the datasource for the suggestions repeater, available through
+ * the {@link getSuggestions Suggestions} property. Header, footer templates and
+ * other properties of the repeater can be access via the {@link getSuggestions Suggestions}
+ * property and its sub-properties.
+ *
+ * The {@link setTextCssClass TextCssClass} property if set is used to find
+ * the element within the Suggestions.ItemTemplate and Suggestions.AlternatingItemTemplate
+ * that contains the actual text for the suggestion selected. That is,
+ * only text inside elements with CSS class name equal to {@link setTextCssClass TextCssClass}
+ * will be used as suggestions.
+ *
+ * To return the list of suggestions back to the browser, supply a non-empty data source
+ * and call databind. For example,
+ * <code>
+ * function autocomplete_suggestion($sender, $param)
+ * {
+ *   $token = $param->getToken(); //the partial word to match
+ *   $sender->setDataSource($this->getSuggestionsFor($token)); //set suggestions
+ *   $sender->dataBind();
+ * }
+ * </code>
+ *
+ * The suggestion will be rendered when the {@link dataBind()} method is called
+ * <strong>during a callback request</strong>.
+ *
+ * When an suggestion is selected, that is, when the use has clicked, pressed
+ * the "Enter" key, or pressed the "Tab" key, the {@link onSuggestionSelected OnSuggestionSelected}
+ * event is raised. The
+ * {@link TCallbackEventParameter::getCallbackParameter TCallbackEventParameter::CallbackParameter}
+ * property contains the index of the selected suggestion.
+ *
+ * TAutoComplete allows multiple suggestions within one textbox with each
+ * word or phrase separated by any characters specified in the
+ * {@link setSeparator Separator} property. The {@link setFrequency Frequency}
+ * and {@link setMinChars MinChars} properties sets the delay and minimum number
+ * of characters typed, respectively, before requesting for sugggestions.
+ *
+ * Use {@link onTextChange OnTextChange} and/or {@link onCallback OnCallback} events
+ * to handle post backs due to {@link setAutoPostBack AutoPostBack}.
+ *
+ * In the {@link getSuggestions Suggestions} TRepater item template, all HTML text elements
+ * are considered as text for the suggestion. Text within HTML elements with CSS class name
+ * "informal" are ignored as text for suggestions.
+ *
+ * @author Wei Zhuo <weizhuo[at]gmail[dot]com>
+ * @package System.Web.UI.ActiveControls
+ * @since 3.1
+ */
+class TAutoComplete extends TActiveTextBox implements INamingContainer
+{
+	/**
+	 * @var ITemplate template for repeater items
+	 */
+	private $_repeater=null;
+	/**
+	 * @var TPanel result panel holding the suggestion items.
+	 */
+	private $_resultPanel=null;
+
+	/**
+	 * @return string word or token separators (delimiters).
+	 */
+	public function getSeparator()
+	{
+		return $this->getViewState('tokens', '');
+	}
+
+	/**
+	 * @return string word or token separators (delimiters).
+	 */
+	public function setSeparator($value)
+	{
+		$this->setViewState('tokens', TPropertyValue::ensureString($value), '');
+	}
+
+	/**
+	 * @return float maximum delay (in seconds) before requesting a suggestion.
+	 */
+	public function getFrequency()
+	{
+		return $this->getViewState('frequency', '');
+	}
+
+	/**
+	 * @param float maximum delay (in seconds) before requesting a suggestion.
+	 * Default is 0.4.
+	 */
+	public function setFrequency($value)
+	{
+		$this->setViewState('frequency', TPropertyValue::ensureFloat($value),'');
+	}
+
+	/**
+	 * @return integer minimum number of characters before requesting a suggestion.
+	 */
+	public function getMinChars()
+	{
+		return $this->getViewState('minChars','');
+	}
+
+	/**
+	 * @param integer minimum number of characters before requesting a suggestion.
+	 */
+	public function setMinChars($value)
+	{
+		$this->setViewState('minChars', TPropertyValue::ensureInteger($value), '');
+	}
+
+	/**
+	 * @param string Css class name of the element to use for suggestion.
+	 */
+	public function setTextCssClass($value)
+	{
+		$this->setViewState('TextCssClass', $value);
+	}
+
+	/**
+	 * @return string Css class name of the element to use for suggestion.
+	 */
+	public function getTextCssClass()
+	{
+		return $this->getViewState('TextCssClass');
+	}
+
+	/**
+	 * Raises the callback event. This method is overrides the parent implementation.
+	 * If {@link setAutoPostBack AutoPostBack} is enabled it will raise
+	 * {@link onTextChanged OnTextChanged} event event and then the
+	 * {@link onCallback OnCallback} event. The {@link onSuggest OnSuggest} event is
+	 * raise if the request is to find sugggestions, the {@link onTextChanged OnTextChanged}
+	 * and {@link onCallback OnCallback} events are <b>NOT</b> raised.
+	 * This method is mainly used by framework and control developers.
+	 * @param TCallbackEventParameter the event parameter
+	 */
+ 	public function raiseCallbackEvent($param)
+	{
+		$token = $param->getCallbackParameter();
+		if(is_array($token) && count($token) == 2)
+		{
+			if($token[1] === '__TAutoComplete_onSuggest__')
+			{
+				$parameter = new TAutoCompleteEventParameter($this->getResponse(), $token[0]);
+				$this->onSuggest($parameter);
+			}
+			else if($token[1] === '__TAutoComplete_onSuggestionSelected__')
+			{
+				$parameter = new TAutoCompleteEventParameter($this->getResponse(), null, $token[0]);
+				$this->onSuggestionSelected($parameter);
+			}
+		}
+		else if($this->getAutoPostBack())
+			parent::raiseCallbackEvent($param);
+	}
+
+	/**
+	 * This method is invoked when an autocomplete suggestion is requested.
+	 * The method raises 'OnSuggest' event. If you override this
+	 * method, be sure to call the parent implementation so that the event
+	 * handler can be invoked.
+	 * @param TCallbackEventParameter event parameter to be passed to the event handlers
+	 */
+	public function onSuggest($param)
+	{
+		$this->raiseEvent('OnSuggest', $this, $param);
+	}
+
+	/**
+	 * This method is invoked when an autocomplete suggestion is selected.
+	 * The method raises 'OnSuggestionSelected' event. If you override this
+	 * method, be sure to call the parent implementation so that the event
+	 * handler can be invoked.
+	 * @param TCallbackEventParameter event parameter to be passed to the event handlers
+	 */
+	public function onSuggestionSelected($param)
+	{
+		$this->raiseEvent('OnSuggestionSelected', $this, $param);
+	}
+
+	/**
+	 * @param array data source for suggestions.
+	 */
+	public function setDataSource($data)
+	{
+		$this->getSuggestions()->setDataSource($data);
+	}
+
+	/**
+	 * Overrides parent implementation. Callback {@link renderSuggestions()} when
+	 * page's IsCallback property is true.
+	 */
+	public function dataBind()
+	{
+		parent::dataBind();
+		if($this->getPage()->getIsCallback())
+			$this->renderSuggestions($this->getResponse()->createHtmlWriter());
+	}
+
+	/**
+	 * @return TPanel suggestion results panel.
+	 */
+	public function getResultPanel()
+	{
+		if($this->_resultPanel===null)
+			$this->_resultPanel = $this->createResultPanel();
+		return $this->_resultPanel;
+	}
+
+	/**
+	 * @return TPanel new instance of result panel. Default uses TPanel.
+	 */
+	protected function createResultPanel()
+	{
+		$panel = Prado::createComponent('System.Web.UI.WebControls.TPanel');
+		$this->getControls()->add($panel);
+		$panel->setID('result');
+		return $panel;
+	}
+
+	/**
+	 * @return TRepeater suggestion list repeater
+	 */
+	public function getSuggestions()
+	{
+		if($this->_repeater===null)
+			$this->_repeater = $this->createRepeater();
+		return $this->_repeater;
+	}
+
+	/**
+	 * @return TRepeater new instance of TRepater to render the list of suggestions.
+	 */
+	protected function createRepeater()
+	{
+		$repeater = Prado::createComponent('System.Web.UI.WebControls.TRepeater');
+		$repeater->setHeaderTemplate(new TAutoCompleteTemplate('<ul>'));
+		$repeater->setFooterTemplate(new TAutoCompleteTemplate('</ul>'));
+		$repeater->setItemTemplate(new TTemplate('<li><%# $this->DataItem %></li>',null));
+		$repeater->setEmptyTemplate(new TAutoCompleteTemplate('<ul></ul>'));
+		$this->getControls()->add($repeater);
+		return $repeater;
+	}
+
+	/**
+	 * Renders the end tag and registers the needed javascript library.
+	 */
+	public function renderEndTag($writer)
+	{
+		$cs=$this->getPage()->getClientScript();
+		$cs->registerPradoScript('autocomplete');
+		parent::renderEndTag($writer);
+		$this->renderResultPanel($writer);
+	}
+
+	/**
+	 * Renders the result panel.
+	 * @param THtmlWriter the renderer.
+	 */
+	protected function renderResultPanel($writer)
+	{
+		$this->getResultPanel()->render($writer);
+	}
+
+	/**
+	 * Renders the suggestions during a callback respones.
+	 * @param THtmlWriter the renderer.
+	 */
+	public function renderCallback($writer)
+	{
+		$this->renderSuggestions($writer);
+	}
+
+	/**
+	 * Renders the suggestions repeater.
+	 * @param THtmlWriter the renderer.
+	 */
+	public function renderSuggestions($writer)
+	{
+		if($this->getActiveControl()->canUpdateClientSide())
+		{
+			$this->getSuggestions()->render($writer);
+			$boundary = $writer->getWriter()->getBoundary();
+			$this->getResponse()->getAdapter()->setResponseData($boundary);
+		}
+	}
+
+	/**
+	 * @return array list of callback options.
+	 */
+	protected function getPostBackOptions()
+	{
+		//disallow page state update ?
+		//$this->getActiveControl()->getClientSide()->setEnablePageStateUpdate(false);
+		$options = array();
+		if(strlen($string = $this->getSeparator()))
+		{
+			$string = strtr($string,array('\t'=>"\t",'\n'=>"\n",'\r'=>"\r"));
+			$token = preg_split('//', $string, -1, PREG_SPLIT_NO_EMPTY);
+			$options['tokens'] = $token;
+		}
+		if($this->getAutoPostBack())
+		{
+			$options = array_merge($options,parent::getPostBackOptions());
+			$options['AutoPostBack'] = true;
+		}
+		if(strlen($select = $this->getTextCssClass()))
+			$options['select'] = $select;
+		$options['ResultPanel'] = $this->getResultPanel()->getClientID();
+		$options['ID'] = $this->getClientID();
+		$options['EventTarget'] = $this->getUniqueID();
+		if(($minchars=$this->getMinChars())!=='')
+			$options['minChars'] = $minchars;
+		if(($frequency=$this->getFrequency())!=='')
+			$options['frequency'] = $frequency;
+		$options['CausesValidation'] = $this->getCausesValidation();
+		$options['ValidationGroup'] = $this->getValidationGroup();
+		return $options;
+	}
+
+	/**
+	 * Override parent implementation, no javascript is rendered here instead
+	 * the javascript required for active control is registered in {@link addAttributesToRender}.
+	 */
+	protected function renderClientControlScript($writer)
+	{
+	}
+
+	/**
+	 * @return string corresponding javascript class name for this TActiveButton.
+	 */
+	protected function getClientClassName()
+	{
+		return 'Prado.WebUI.TAutoComplete';
+	}
+}
+
+/**
+ * TAutCompleteEventParameter contains the {@link getToken Token} requested by
+ * the user for a partial match of the suggestions.
+ *
+ * The {@link getSelectedIndex SelectedIndex} is a zero-based index of the
+ * suggestion selected by the user, -1 if not suggestion is selected.
+ *
+ * @author Wei Zhuo <weizhuo[at]gmail[dot]com>
+ * @package System.Web.UI.ActiveControls
+ * @since 3.1
+ */
+class TAutoCompleteEventParameter extends TCallbackEventParameter
+{
+	private $_selectedIndex=-1;
+
+	/**
+	 * Creates a new TCallbackEventParameter.
+	 */
+	public function __construct($response, $parameter, $index=-1)
+	{
+		parent::__construct($response, $parameter);
+		$this->_selectedIndex=$index;
+	}
+
+	/**
+	 * @return int selected suggestion zero-based index, -1 if not selected.
+	 */
+	public function getSelectedIndex()
+	{
+		return $this->_selectedIndex;
+	}
+
+	/**
+	 * @return string token for matching a list of suggestions.
+	 */
+	public function getToken()
+	{
+		return $this->getCallbackParameter();
+	}
+}
+
+/**
+ * TAutoCompleteTemplate class.
+ *
+ * TAutoCompleteTemplate is the default template for TAutoCompleteTemplate
+ * item template.
+ *
+ * @author Wei Zhuo <weizhuo[at]gmail[dot]com>
+ * @package System.Web.UI.ActiveControls
+ * @since 3.1
+ */
+class TAutoCompleteTemplate extends TComponent implements ITemplate
+{
+	private $_template;
+
+	public function __construct($template)
+	{
+		$this->_template = $template;
+	}
+	/**
+	 * Instantiates the template.
+	 * It creates a {@link TDataList} control.
+	 * @param TControl parent to hold the content within the template
+	 */
+	public function instantiateIn($parent)
+	{
+		$parent->getControls()->add($this->_template);
+	}
+}
+