API: autocomplete AutoComplete.js (YUI Library)

/** * The AutoComplete control provides the front-end logic for text-entry suggestion and * completion functionality. * * @module autocomplete * @requires yahoo, dom, event, datasource * @optional animation, connection * @namespace YAHOO.widget * @title AutoComplete Widget */ /****************************************************************************/ /****************************************************************************/ /****************************************************************************/ /** * The AutoComplete class provides the customizable functionality of a plug-and-play DHTML * auto completion widget. Some key features: * <ul> * <li>Navigate with up/down arrow keys and/or mouse to pick a selection</li> * <li>The drop down container can "roll down" or "fly out" via configurable * animation</li> * <li>UI look-and-feel customizable through CSS, including container * attributes, borders, position, fonts, etc</li> * </ul> * * @class AutoComplete * @constructor * @param elInput {HTMLElement} DOM element reference of an input field. * @param elInput {String} String ID of an input field. * @param elContainer {HTMLElement} DOM element reference of an existing DIV. * @param elContainer {String} String ID of an existing DIV. * @param oDataSource {YAHOO.widget.DataSource} DataSource instance. * @param oConfigs {Object} (optional) Object literal of configuration params. */ YAHOO.widget.AutoComplete = function(elInput,elContainer,oDataSource,oConfigs) { if(elInput && elContainer && oDataSource) { // Validate DataSource if(oDataSource instanceof YAHOO.widget.DataSource) { this.dataSource = oDataSource; } else { YAHOO.log("Could not instantiate AutoComplete due to an invalid DataSource", "error", this.toString()); return; } // Validate input element if(YAHOO.util.Dom.inDocument(elInput)) { if(YAHOO.lang.isString(elInput)) { this._sName = "instance" + YAHOO.widget.AutoComplete._nIndex + " " + elInput; this._oTextbox = document.getElementById(elInput); } else { this._sName = (elInput.id) ? "instance" + YAHOO.widget.AutoComplete._nIndex + " " + elInput.id: "instance" + YAHOO.widget.AutoComplete._nIndex; this._oTextbox = elInput; } YAHOO.util.Dom.addClass(this._oTextbox, "yui-ac-input"); } else { YAHOO.log("Could not instantiate AutoComplete due to an invalid input element", "error", this.toString()); return; } // Validate container element if(YAHOO.util.Dom.inDocument(elContainer)) { if(YAHOO.lang.isString(elContainer)) { this._oContainer = document.getElementById(elContainer); } else { this._oContainer = elContainer; } if(this._oContainer.style.display == "none") { YAHOO.log("The container may not display properly if display is set to \"none\" in CSS", "warn", this.toString()); } // For skinning var elParent = this._oContainer.parentNode; var elTag = elParent.tagName.toLowerCase(); if(elTag == "div") { YAHOO.util.Dom.addClass(elParent, "yui-ac"); } else { YAHOO.log("Could not find the wrapper element for skinning", "warn", this.toString()); } } else { YAHOO.log("Could not instantiate AutoComplete due to an invalid container element", "error", this.toString()); return; } // Set any config params passed in to override defaults if(oConfigs && (oConfigs.constructor == Object)) { for(var sConfig in oConfigs) { if(sConfig) { this[sConfig] = oConfigs[sConfig]; } } } // Initialization sequence this._initContainer(); this._initProps(); this._initList(); this._initContainerHelpers(); // Set up events var oSelf = this; var oTextbox = this._oTextbox; // Events are actually for the content module within the container var oContent = this._oContainer._oContent; // Dom events YAHOO.util.Event.addListener(oTextbox,"keyup",oSelf._onTextboxKeyUp,oSelf); YAHOO.util.Event.addListener(oTextbox,"keydown",oSelf._onTextboxKeyDown,oSelf); YAHOO.util.Event.addListener(oTextbox,"focus",oSelf._onTextboxFocus,oSelf); YAHOO.util.Event.addListener(oTextbox,"blur",oSelf._onTextboxBlur,oSelf); YAHOO.util.Event.addListener(oContent,"mouseover",oSelf._onContainerMouseover,oSelf); YAHOO.util.Event.addListener(oContent,"mouseout",oSelf._onContainerMouseout,oSelf); YAHOO.util.Event.addListener(oContent,"scroll",oSelf._onContainerScroll,oSelf); YAHOO.util.Event.addListener(oContent,"resize",oSelf._onContainerResize,oSelf); YAHOO.util.Event.addListener(oTextbox,"keypress",oSelf._onTextboxKeyPress,oSelf); YAHOO.util.Event.addListener(window,"unload",oSelf._onWindowUnload,oSelf); // Custom events this.textboxFocusEvent = new YAHOO.util.CustomEvent("textboxFocus", this); this.textboxKeyEvent = new YAHOO.util.CustomEvent("textboxKey", this); this.dataRequestEvent = new YAHOO.util.CustomEvent("dataRequest", this); this.dataReturnEvent = new YAHOO.util.CustomEvent("dataReturn", this); this.dataErrorEvent = new YAHOO.util.CustomEvent("dataError", this); this.containerExpandEvent = new YAHOO.util.CustomEvent("containerExpand", this); this.typeAheadEvent = new YAHOO.util.CustomEvent("typeAhead", this); this.itemMouseOverEvent = new YAHOO.util.CustomEvent("itemMouseOver", this); this.itemMouseOutEvent = new YAHOO.util.CustomEvent("itemMouseOut", this); this.itemArrowToEvent = new YAHOO.util.CustomEvent("itemArrowTo", this); this.itemArrowFromEvent = new YAHOO.util.CustomEvent("itemArrowFrom", this); this.itemSelectEvent = new YAHOO.util.CustomEvent("itemSelect", this); this.unmatchedItemSelectEvent = new YAHOO.util.CustomEvent("unmatchedItemSelect", this); this.selectionEnforceEvent = new YAHOO.util.CustomEvent("selectionEnforce", this); this.containerCollapseEvent = new YAHOO.util.CustomEvent("containerCollapse", this); this.textboxBlurEvent = new YAHOO.util.CustomEvent("textboxBlur", this); // Finish up oTextbox.setAttribute("autocomplete","off"); YAHOO.widget.AutoComplete._nIndex++; YAHOO.log("AutoComplete initialized","info",this.toString()); } // Required arguments were not found else { YAHOO.log("Could not instantiate AutoComplete due invalid arguments", "error", this.toString()); } }; ///////////////////////////////////////////////////////////////////////////// // // Public member variables // ///////////////////////////////////////////////////////////////////////////// /** * The DataSource object that encapsulates the data used for auto completion. * This object should be an inherited object from YAHOO.widget.DataSource. * * @property dataSource * @type YAHOO.widget.DataSource */ YAHOO.widget.AutoComplete.prototype.dataSource = null; /** * Number of characters that must be entered before querying for results. A negative value * effectively turns off the widget. A value of 0 allows queries of null or empty string * values. * * @property minQueryLength * @type Number * @default 1 */ YAHOO.widget.AutoComplete.prototype.minQueryLength = 1; /** * Maximum number of results to display in results container. * * @property maxResultsDisplayed * @type Number * @default 10 */ YAHOO.widget.AutoComplete.prototype.maxResultsDisplayed = 10; /** * Number of seconds to delay before submitting a query request. If a query * request is received before a previous one has completed its delay, the * previous request is cancelled and the new request is set to the delay. * Implementers should take care when setting this value very low (i.e., less * than 0.2) with low latency DataSources and the typeAhead feature enabled, as * fast typers may see unexpected behavior. * * @property queryDelay * @type Number * @default 0.2 */ YAHOO.widget.AutoComplete.prototype.queryDelay = 0.2; /** * Class name of a highlighted item within results container. * * @property highlightClassName * @type String * @default "yui-ac-highlight" */ YAHOO.widget.AutoComplete.prototype.highlightClassName = "yui-ac-highlight"; /** * Class name of a pre-highlighted item within results container. * * @property prehighlightClassName * @type String */ YAHOO.widget.AutoComplete.prototype.prehighlightClassName = null; /** * Query delimiter. A single character separator for multiple delimited * selections. Multiple delimiter characteres may be defined as an array of * strings. A null value or empty string indicates that query results cannot * be delimited. This feature is not recommended if you need forceSelection to * be true. * * @property delimChar * @type String | String[] */ YAHOO.widget.AutoComplete.prototype.delimChar = null; /** * Whether or not the first item in results container should be automatically highlighted * on expand. * * @property autoHighlight * @type Boolean * @default true */ YAHOO.widget.AutoComplete.prototype.autoHighlight = true; /** * Whether or not the input field should be automatically updated * with the first query result as the user types, auto-selecting the substring * that the user has not typed. * * @property typeAhead * @type Boolean * @default false */ YAHOO.widget.AutoComplete.prototype.typeAhead = false; /** * Whether or not to animate the expansion/collapse of the results container in the * horizontal direction. * * @property animHoriz * @type Boolean * @default false */ YAHOO.widget.AutoComplete.prototype.animHoriz = false; /** * Whether or not to animate the expansion/collapse of the results container in the * vertical direction. * * @property animVert * @type Boolean * @default true */ YAHOO.widget.AutoComplete.prototype.animVert = true; /** * Speed of container expand/collapse animation, in seconds.. * * @property animSpeed * @type Number * @default 0.3 */ YAHOO.widget.AutoComplete.prototype.animSpeed = 0.3; /** * Whether or not to force the user's selection to match one of the query * results. Enabling this feature essentially transforms the input field into a * <select> field. This feature is not recommended with delimiter character(s) * defined. * * @property forceSelection * @type Boolean * @default false */ YAHOO.widget.AutoComplete.prototype.forceSelection = false; /** * Whether or not to allow browsers to cache user-typed input in the input * field. Disabling this feature will prevent the widget from setting the * autocomplete="off" on the input field. When autocomplete="off" * and users click the back button after form submission, user-typed input can * be prefilled by the browser from its cache. This caching of user input may * not be desired for sensitive data, such as credit card numbers, in which * case, implementers should consider setting allowBrowserAutocomplete to false. * * @property allowBrowserAutocomplete * @type Boolean * @default true */ YAHOO.widget.AutoComplete.prototype.allowBrowserAutocomplete = true; /** * Whether or not the results container should always be displayed. * Enabling this feature displays the container when the widget is instantiated * and prevents the toggling of the container to a collapsed state. * * @property alwaysShowContainer * @type Boolean * @default false */ YAHOO.widget.AutoComplete.prototype.alwaysShowContainer = false; /** * Whether or not to use an iFrame to layer over Windows form elements in * IE. Set to true only when the results container will be on top of a * <select> field in IE and thus exposed to the IE z-index bug (i.e., * 5.5 < IE < 7). * * @property useIFrame * @type Boolean * @default false */ YAHOO.widget.AutoComplete.prototype.useIFrame = false; /** * Whether or not the results container should have a shadow. * * @property useShadow * @type Boolean * @default false */ YAHOO.widget.AutoComplete.prototype.useShadow = false; ///////////////////////////////////////////////////////////////////////////// // // Public methods // ///////////////////////////////////////////////////////////////////////////// /** * Public accessor to the unique name of the AutoComplete instance. * * @method toString * @return {String} Unique name of the AutoComplete instance. */ YAHOO.widget.AutoComplete.prototype.toString = function() { return "AutoComplete " + this._sName; }; /** * Returns true if container is in an expanded state, false otherwise. * * @method isContainerOpen * @return {Boolean} Returns true if container is in an expanded state, false otherwise. */ YAHOO.widget.AutoComplete.prototype.isContainerOpen = function() { return this._bContainerOpen; }; /** * Public accessor to the internal array of DOM <li> elements that * display query results within the results container. * * @method getListItems * @return {HTMLElement[]} Array of <li> elements within the results container. */ YAHOO.widget.AutoComplete.prototype.getListItems = function() { return this._aListItems; }; /** * Public accessor to the data held in an <li> element of the * results container. * * @method getListItemData * @return {Object | Object[]} Object or array of result data or null */ YAHOO.widget.AutoComplete.prototype.getListItemData = function(oListItem) { if(oListItem._oResultData) { return oListItem._oResultData; } else { return false; } }; /** * Sets HTML markup for the results container header. This markup will be * inserted within a <div> tag with a class of "yui-ac-hd". * * @method setHeader * @param sHeader {String} HTML markup for results container header. */ YAHOO.widget.AutoComplete.prototype.setHeader = function(sHeader) { if(sHeader) { if(this._oContainer._oContent._oHeader) { this._oContainer._oContent._oHeader.innerHTML = sHeader; this._oContainer._oContent._oHeader.style.display = "block"; } } else { this._oContainer._oContent._oHeader.innerHTML = ""; this._oContainer._oContent._oHeader.style.display = "none"; } }; /** * Sets HTML markup for the results container footer. This markup will be * inserted within a <div> tag with a class of "yui-ac-ft". * * @method setFooter * @param sFooter {String} HTML markup for results container footer. */ YAHOO.widget.AutoComplete.prototype.setFooter = function(sFooter) { if(sFooter) { if(this._oContainer._oContent._oFooter) { this._oContainer._oContent._oFooter.innerHTML = sFooter; this._oContainer._oContent._oFooter.style.display = "block"; } } else { this._oContainer._oContent._oFooter.innerHTML = ""; this._oContainer._oContent._oFooter.style.display = "none"; } }; /** * Sets HTML markup for the results container body. This markup will be * inserted within a <div> tag with a class of "yui-ac-bd". * * @method setBody * @param sBody {String} HTML markup for results container body. */ YAHOO.widget.AutoComplete.prototype.setBody = function(sBody) { if(sBody) { if(this._oContainer._oContent._oBody) { this._oContainer._oContent._oBody.innerHTML = sBody; this._oContainer._oContent._oBody.style.display = "block"; this._oContainer._oContent.style.display = "block"; } } else { this._oContainer._oContent._oBody.innerHTML = ""; this._oContainer._oContent.style.display = "none"; } this._maxResultsDisplayed = 0; }; /** * Overridable method that converts a result item object into HTML markup * for display. Return data values are accessible via the oResultItem object, * and the key return value will always be oResultItem[0]. Markup will be * displayed within <li> element tags in the container. * * @method formatResult * @param oResultItem {Object} Result item representing one query result. Data is held in an array. * @param sQuery {String} The current query string. * @return {String} HTML markup of formatted result data. */ YAHOO.widget.AutoComplete.prototype.formatResult = function(oResultItem, sQuery) { var sResult = oResultItem[0]; if(sResult) { return sResult; } else { return ""; } }; /** * Overridable method called before container expands allows implementers to access data * and DOM elements. * * @method doBeforeExpandContainer * @param oTextbox {HTMLElement} The text input box. * @param oContainer {HTMLElement} The container element. * @param sQuery {String} The query string. * @param aResults {Object[]} An array of query results. * @return {Boolean} Return true to continue expanding container, false to cancel the expand. */ YAHOO.widget.AutoComplete.prototype.doBeforeExpandContainer = function(oTextbox, oContainer, sQuery, aResults) { return true; }; /** * Makes query request to the DataSource. * * @method sendQuery * @param sQuery {String} Query string. */ YAHOO.widget.AutoComplete.prototype.sendQuery = function(sQuery) { this._sendQuery(sQuery); }; /** * Overridable method gives implementers access to the query before it gets sent. * * @method doBeforeSendQuery * @param sQuery {String} Query string. * @return {String} Query string. */ YAHOO.widget.AutoComplete.prototype.doBeforeSendQuery = function(sQuery) { return sQuery; }; /** * Nulls out the entire AutoComplete instance and related objects, removes attached * event listeners, and clears out DOM elements inside the container. After * calling this method, the instance reference should be expliclitly nulled by * implementer, as in myDataTable = null. Use with caution! * * @method destroy */ YAHOO.widget.AutoComplete.prototype.destroy = function() { var instanceName = this.toString(); var elInput = this._oTextbox; var elContainer = this._oContainer; // Unhook custom events this.textboxFocusEvent.unsubscribe(); this.textboxKeyEvent.unsubscribe(); this.dataRequestEvent.unsubscribe(); this.dataReturnEvent.unsubscribe(); this.dataErrorEvent.unsubscribe(); this.containerExpandEvent.unsubscribe(); this.typeAheadEvent.unsubscribe(); this.itemMouseOverEvent.unsubscribe(); this.itemMouseOutEvent.unsubscribe(); this.itemArrowToEvent.unsubscribe(); this.itemArrowFromEvent.unsubscribe(); this.itemSelectEvent.unsubscribe(); this.unmatchedItemSelectEvent.unsubscribe(); this.selectionEnforceEvent.unsubscribe(); this.containerCollapseEvent.unsubscribe(); this.textboxBlurEvent.unsubscribe(); // Unhook DOM events YAHOO.util.Event.purgeElement(elInput, true); YAHOO.util.Event.purgeElement(elContainer, true); // Remove DOM elements elContainer.innerHTML = ""; // Null out objects for(var key in this) { if(YAHOO.lang.hasOwnProperty(this, key)) { this[key] = null; } } YAHOO.log("AutoComplete instance destroyed: " + instanceName); }; ///////////////////////////////////////////////////////////////////////////// // // Public events // ///////////////////////////////////////////////////////////////////////////// /** * Fired when the input field receives focus. * * @event textboxFocusEvent * @param oSelf {YAHOO.widget.AutoComplete} The AutoComplete instance. */ YAHOO.widget.AutoComplete.prototype.textboxFocusEvent = null; /** * Fired when the input field receives key input. * * @event textboxKeyEvent * @param oSelf {YAHOO.widget.AutoComplete} The AutoComplete instance. * @param nKeycode {Number} The keycode number. */ YAHOO.widget.AutoComplete.prototype.textboxKeyEvent = null; /** * Fired when the AutoComplete instance makes a query to the DataSource. * * @event dataRequestEvent * @param oSelf {YAHOO.widget.AutoComplete} The AutoComplete instance. * @param sQuery {String} The query string. */ YAHOO.widget.AutoComplete.prototype.dataRequestEvent = null; /** * Fired when the AutoComplete instance receives query results from the data * source. * * @event dataReturnEvent * @param oSelf {YAHOO.widget.AutoComplete} The AutoComplete instance. * @param sQuery {String} The query string. * @param aResults {Object[]} Results array. */ YAHOO.widget.AutoComplete.prototype.dataReturnEvent = null; /** * Fired when the AutoComplete instance does not receive query results from the * DataSource due to an error. * * @event dataErrorEvent * @param oSelf {YAHOO.widget.AutoComplete} The AutoComplete instance. * @param sQuery {String} The query string. */ YAHOO.widget.AutoComplete.prototype.dataErrorEvent = null; /** * Fired when the results container is expanded. * * @event containerExpandEvent * @param oSelf {YAHOO.widget.AutoComplete} The AutoComplete instance. */ YAHOO.widget.AutoComplete.prototype.containerExpandEvent = null; /** * Fired when the input field has been prefilled by the type-ahead * feature. * * @event typeAheadEvent * @param oSelf {YAHOO.widget.AutoComplete} The AutoComplete instance. * @param sQuery {String} The query string. * @param sPrefill {String} The prefill string. */ YAHOO.widget.AutoComplete.prototype.typeAheadEvent = null; /** * Fired when result item has been moused over. * * @event itemMouseOverEvent * @param oSelf {YAHOO.widget.AutoComplete} The AutoComplete instance. * @param elItem {HTMLElement} The <li&gt element item moused to. */ YAHOO.widget.AutoComplete.prototype.itemMouseOverEvent = null; /** * Fired when result item has been moused out. * * @event itemMouseOutEvent * @param oSelf {YAHOO.widget.AutoComplete} The AutoComplete instance. * @param elItem {HTMLElement} The <li> element item moused from. */ YAHOO.widget.AutoComplete.prototype.itemMouseOutEvent = null; /** * Fired when result item has been arrowed to. * * @event itemArrowToEvent * @param oSelf {YAHOO.widget.AutoComplete} The AutoComplete instance. * @param elItem {HTMLElement} The <li> element item arrowed to. */ YAHOO.widget.AutoComplete.prototype.itemArrowToEvent = null; /** * Fired when result item has been arrowed away from. * * @event itemArrowFromEvent * @param oSelf {YAHOO.widget.AutoComplete} The AutoComplete instance. * @param elItem {HTMLElement} The <li> element item arrowed from. */ YAHOO.widget.AutoComplete.prototype.itemArrowFromEvent = null; /** * Fired when an item is selected via mouse click, ENTER key, or TAB key. * * @event itemSelectEvent * @param oSelf {YAHOO.widget.AutoComplete} The AutoComplete instance. * @param elItem {HTMLElement} The selected <li> element item. * @param oData {Object} The data returned for the item, either as an object, * or mapped from the schema into an array. */ YAHOO.widget.AutoComplete.prototype.itemSelectEvent = null; /** * Fired when a user selection does not match any of the displayed result items. * * @event unmatchedItemSelectEvent * @param oSelf {YAHOO.widget.AutoComplete} The AutoComplete instance. */ YAHOO.widget.AutoComplete.prototype.unmatchedItemSelectEvent = null; /** * Fired if forceSelection is enabled and the user's input has been cleared * because it did not match one of the returned query results. * * @event selectionEnforceEvent * @param oSelf {YAHOO.widget.AutoComplete} The AutoComplete instance. */ YAHOO.widget.AutoComplete.prototype.selectionEnforceEvent = null; /** * Fired when the results container is collapsed. * * @event containerCollapseEvent * @param oSelf {YAHOO.widget.AutoComplete} The AutoComplete instance. */ YAHOO.widget.AutoComplete.prototype.containerCollapseEvent = null; /** * Fired when the input field loses focus. * * @event textboxBlurEvent * @param oSelf {YAHOO.widget.AutoComplete} The AutoComplete instance. */ YAHOO.widget.AutoComplete.prototype.textboxBlurEvent = null; ///////////////////////////////////////////////////////////////////////////// // // Private member variables // ///////////////////////////////////////////////////////////////////////////// /** * Internal class variable to index multiple AutoComplete instances. * * @property _nIndex * @type Number * @default 0 * @private */ YAHOO.widget.AutoComplete._nIndex = 0; /** * Name of AutoComplete instance. * * @property _sName * @type String * @private */ YAHOO.widget.AutoComplete.prototype._sName = null; /** * Text input field DOM element. * * @property _oTextbox * @type HTMLElement * @private */ YAHOO.widget.AutoComplete.prototype._oTextbox = null; /** * Whether or not the input field is currently in focus. If query results come back * but the user has already moved on, do not proceed with auto complete behavior. * * @property _bFocused * @type Boolean * @private */ YAHOO.widget.AutoComplete.prototype._bFocused = true; /** * Animation instance for container expand/collapse. * * @property _oAnim * @type Boolean * @private */ YAHOO.widget.AutoComplete.prototype._oAnim = null; /** * Container DOM element. * * @property _oContainer * @type HTMLElement * @private */ YAHOO.widget.AutoComplete.prototype._oContainer = null; /** * Whether or not the results container is currently open. * * @property _bContainerOpen * @type Boolean * @private */ YAHOO.widget.AutoComplete.prototype._bContainerOpen = false; /** * Whether or not the mouse is currently over the results * container. This is necessary in order to prevent clicks on container items * from being text input field blur events. * * @property _bOverContainer * @type Boolean * @private */ YAHOO.widget.AutoComplete.prototype._bOverContainer = false; /** * Array of <li> elements references that contain query results within the * results container. * * @property _aListItems * @type HTMLElement[] * @private */ YAHOO.widget.AutoComplete.prototype._aListItems = null; /** * Number of <li> elements currently displayed in results container. * * @property _nDisplayedItems * @type Number * @private */ YAHOO.widget.AutoComplete.prototype._nDisplayedItems = 0; /** * Internal count of <li> elements displayed and hidden in results container. * * @property _maxResultsDisplayed * @type Number * @private */ YAHOO.widget.AutoComplete.prototype._maxResultsDisplayed = 0; /** * Current query string * * @property _sCurQuery * @type String * @private */ YAHOO.widget.AutoComplete.prototype._sCurQuery = null; /** * Past queries this session (for saving delimited queries). * * @property _sSavedQuery * @type String * @private */ YAHOO.widget.AutoComplete.prototype._sSavedQuery = null; /** * Pointer to the currently highlighted <li> element in the container. * * @property _oCurItem * @type HTMLElement * @private */ YAHOO.widget.AutoComplete.prototype._oCurItem = null; /** * Whether or not an item has been selected since the container was populated * with results. Reset to false by _populateList, and set to true when item is * selected. * * @property _bItemSelected * @type Boolean * @private */ YAHOO.widget.AutoComplete.prototype._bItemSelected = false; /** * Key code of the last key pressed in textbox. * * @property _nKeyCode * @type Number * @private */ YAHOO.widget.AutoComplete.prototype._nKeyCode = null; /** * Delay timeout ID. * * @property _nDelayID * @type Number * @private */ YAHOO.widget.AutoComplete.prototype._nDelayID = -1; /** * Src to iFrame used when useIFrame = true. Supports implementations over SSL * as well. * * @property _iFrameSrc * @type String * @private */ YAHOO.widget.AutoComplete.prototype._iFrameSrc = "javascript:false;"; /** * For users typing via certain IMEs, queries must be triggered by intervals, * since key events yet supported across all browsers for all IMEs. * * @property _queryInterval * @type Object * @private */ YAHOO.widget.AutoComplete.prototype._queryInterval = null; /** * Internal tracker to last known textbox value, used to determine whether or not * to trigger a query via interval for certain IME users. * * @event _sLastTextboxValue * @type String * @private */ YAHOO.widget.AutoComplete.prototype._sLastTextboxValue = null; ///////////////////////////////////////////////////////////////////////////// // // Private methods // ///////////////////////////////////////////////////////////////////////////// /** * Updates and validates latest public config properties. * * @method __initProps * @private */ YAHOO.widget.AutoComplete.prototype._initProps = function() { // Correct any invalid values var minQueryLength = this.minQueryLength; if(!YAHOO.lang.isNumber(minQueryLength)) { this.minQueryLength = 1; } var maxResultsDisplayed = this.maxResultsDisplayed; if(!YAHOO.lang.isNumber(maxResultsDisplayed) || (maxResultsDisplayed < 1)) { this.maxResultsDisplayed = 10; } var queryDelay = this.queryDelay; if(!YAHOO.lang.isNumber(queryDelay) || (queryDelay < 0)) { this.queryDelay = 0.2; } var delimChar = this.delimChar; if(YAHOO.lang.isString(delimChar) && (delimChar.length > 0)) { this.delimChar = [delimChar]; } else if(!YAHOO.lang.isArray(delimChar)) { this.delimChar = null; } var animSpeed = this.animSpeed; if((this.animHoriz || this.animVert) && YAHOO.util.Anim) { if(!YAHOO.lang.isNumber(animSpeed) || (animSpeed < 0)) { this.animSpeed = 0.3; } if(!this._oAnim ) { this._oAnim = new YAHOO.util.Anim(this._oContainer._oContent, {}, this.animSpeed); } else { this._oAnim.duration = this.animSpeed; } } if(this.forceSelection && delimChar) { YAHOO.log("The forceSelection feature has been enabled with delimChar defined.","warn", this.toString()); } }; /** * Initializes the results container helpers if they are enabled and do * not exist * * @method _initContainerHelpers * @private */ YAHOO.widget.AutoComplete.prototype._initContainerHelpers = function() { if(this.useShadow && !this._oContainer._oShadow) { var oShadow = document.createElement("div"); oShadow.className = "yui-ac-shadow"; this._oContainer._oShadow = this._oContainer.appendChild(oShadow); } if(this.useIFrame && !this._oContainer._oIFrame) { var oIFrame = document.createElement("iframe"); oIFrame.src = this._iFrameSrc; oIFrame.frameBorder = 0; oIFrame.scrolling = "no"; oIFrame.style.position = "absolute"; oIFrame.style.width = "100%"; oIFrame.style.height = "100%"; oIFrame.tabIndex = -1; this._oContainer._oIFrame = this._oContainer.appendChild(oIFrame); } }; /** * Initializes the results container once at object creation * * @method _initContainer * @private */ YAHOO.widget.AutoComplete.prototype._initContainer = function() { YAHOO.util.Dom.addClass(this._oContainer, "yui-ac-container"); if(!this._oContainer._oContent) { // The oContent div helps size the iframe and shadow properly var oContent = document.createElement("div"); oContent.className = "yui-ac-content"; oContent.style.display = "none"; this._oContainer._oContent = this._oContainer.appendChild(oContent); var oHeader = document.createElement("div"); oHeader.className = "yui-ac-hd"; oHeader.style.display = "none"; this._oContainer._oContent._oHeader = this._oContainer._oContent.appendChild(oHeader); var oBody = document.createElement("div"); oBody.className = "yui-ac-bd"; this._oContainer._oContent._oBody = this._oContainer._oContent.appendChild(oBody); var oFooter = document.createElement("div"); oFooter.className = "yui-ac-ft"; oFooter.style.display = "none"; this._oContainer._oContent._oFooter = this._oContainer._oContent.appendChild(oFooter); } else { YAHOO.log("Could not initialize the container","warn",this.toString()); } }; /** * Clears out contents of container body and creates up to * YAHOO.widget.AutoComplete#maxResultsDisplayed <li> elements in an * <ul> element. * * @method _initList * @private */ YAHOO.widget.AutoComplete.prototype._initList = function() { this._aListItems = []; while(this._oContainer._oContent._oBody.hasChildNodes()) { var oldListItems = this.getListItems(); if(oldListItems) { for(var oldi = oldListItems.length-1; oldi >= 0; oldi--) { oldListItems[oldi] = null; } } this._oContainer._oContent._oBody.innerHTML = ""; } var oList = document.createElement("ul"); oList = this._oContainer._oContent._oBody.appendChild(oList); for(var i=0; i<this.maxResultsDisplayed; i++) { var oItem = document.createElement("li"); oItem = oList.appendChild(oItem); this._aListItems[i] = oItem; this._initListItem(oItem, i); } this._maxResultsDisplayed = this.maxResultsDisplayed; }; /** * Initializes each <li> element in the container list. * * @method _initListItem * @param oItem {HTMLElement} The <li> DOM element. * @param nItemIndex {Number} The index of the element. * @private */ YAHOO.widget.AutoComplete.prototype._initListItem = function(oItem, nItemIndex) { var oSelf = this; oItem.style.display = "none"; oItem._nItemIndex = nItemIndex; oItem.mouseover = oItem.mouseout = oItem.onclick = null; YAHOO.util.Event.addListener(oItem,"mouseover",oSelf._onItemMouseover,oSelf); YAHOO.util.Event.addListener(oItem,"mouseout",oSelf._onItemMouseout,oSelf); YAHOO.util.Event.addListener(oItem,"click",oSelf._onItemMouseclick,oSelf); }; /** * Enables interval detection for Korean IME support. * * @method _onIMEDetected * @param oSelf {YAHOO.widget.AutoComplete} The AutoComplete instance. * @private */ YAHOO.widget.AutoComplete.prototype._onIMEDetected = function(oSelf) { oSelf._enableIntervalDetection(); }; /** * Enables query triggers based on text input detection by intervals (rather * than by key events). * * @method _enableIntervalDetection * @private */ YAHOO.widget.AutoComplete.prototype._enableIntervalDetection = function() { var currValue = this._oTextbox.value; var lastValue = this._sLastTextboxValue; if(currValue != lastValue) { this._sLastTextboxValue = currValue; this._sendQuery(currValue); } }; /** * Cancels text input detection by intervals. * * @method _cancelIntervalDetection * @param oSelf {YAHOO.widget.AutoComplete} The AutoComplete instance. * @private */ YAHOO.widget.AutoComplete.prototype._cancelIntervalDetection = function(oSelf) { if(oSelf._queryInterval) { clearInterval(oSelf._queryInterval); } }; /** * Whether or not key is functional or should be ignored. Note that the right * arrow key is NOT an ignored key since it triggers queries for certain intl * charsets. * * @method _isIgnoreKey * @param nKeycode {Number} Code of key pressed. * @return {Boolean} True if key should be ignored, false otherwise. * @private */ YAHOO.widget.AutoComplete.prototype._isIgnoreKey = function(nKeyCode) { if((nKeyCode == 9) || (nKeyCode == 13) || // tab, enter (nKeyCode == 16) || (nKeyCode == 17) || // shift, ctl (nKeyCode >= 18 && nKeyCode <= 20) || // alt,pause/break,caps lock (nKeyCode == 27) || // esc (nKeyCode >= 33 && nKeyCode <= 35) || // page up,page down,end /*(nKeyCode >= 36 && nKeyCode <= 38) || // home,left,up (nKeyCode == 40) || // down*/ (nKeyCode >= 36 && nKeyCode <= 40) || // home,left,up, right, down (nKeyCode >= 44 && nKeyCode <= 45)) { // print screen,insert return true; } return false; }; /** * Makes query request to the DataSource. * * @method _sendQuery * @param sQuery {String} Query string. * @private */ YAHOO.widget.AutoComplete.prototype._sendQuery = function(sQuery) { // Widget has been effectively turned off if(this.minQueryLength == -1) { this._toggleContainer(false); YAHOO.log("Property minQueryLength is set to -1", "info", this.toString()); return; } // Delimiter has been enabled var aDelimChar = (this.delimChar) ? this.delimChar : null; if(aDelimChar) { // Loop through all possible delimiters and find the latest one // A " " may be a false positive if they are defined as delimiters AND // are used to separate delimited queries var nDelimIndex = -1; for(var i = aDelimChar.length-1; i >= 0; i--) { var nNewIndex = sQuery.lastIndexOf(aDelimChar[i]); if(nNewIndex > nDelimIndex) { nDelimIndex = nNewIndex; } } // If we think the last delimiter is a space (" "), make sure it is NOT // a false positive by also checking the char directly before it if(aDelimChar[i] == " ") { for (var j = aDelimChar.length-1; j >= 0; j--) { if(sQuery[nDelimIndex - 1] == aDelimChar[j]) { nDelimIndex--; break; } } } // A delimiter has been found so extract the latest query if(nDelimIndex > -1) { var nQueryStart = nDelimIndex + 1; // Trim any white space from the beginning... while(sQuery.charAt(nQueryStart) == " ") { nQueryStart += 1; } // ...and save the rest of the string for later this._sSavedQuery = sQuery.substring(0,nQueryStart); // Here is the query itself sQuery = sQuery.substr(nQueryStart); } else if(sQuery.indexOf(this._sSavedQuery) < 0){ this._sSavedQuery = null; } } // Don't search queries that are too short if((sQuery && (sQuery.length < this.minQueryLength)) || (!sQuery && this.minQueryLength > 0)) { if(this._nDelayID != -1) { clearTimeout(this._nDelayID); } this._toggleContainer(false); YAHOO.log("Query \"" + sQuery + "\" is too short", "info", this.toString()); return; } sQuery = encodeURIComponent(sQuery); this._nDelayID = -1; // Reset timeout ID because request has been made sQuery = this.doBeforeSendQuery(sQuery); this.dataRequestEvent.fire(this, sQuery); YAHOO.log("Sending query \"" + sQuery + "\"", "info", this.toString()); this.dataSource.getResults(this._populateList, sQuery, this); }; /** * Populates the array of <li> elements in the container with query * results. This method is passed to YAHOO.widget.DataSource#getResults as a * callback function so results from the DataSource instance are returned to the * AutoComplete instance. * * @method _populateList * @param sQuery {String} The query string. * @param aResults {Object[]} An array of query result objects from the DataSource. * @param oSelf {YAHOO.widget.AutoComplete} The AutoComplete instance. * @private */ YAHOO.widget.AutoComplete.prototype._populateList = function(sQuery, aResults, oSelf) { if(aResults === null) { oSelf.dataErrorEvent.fire(oSelf, sQuery); } if(!oSelf._bFocused || !aResults) { YAHOO.log("Could not populate list", "info", oSelf.toString()); return; } var isOpera = (navigator.userAgent.toLowerCase().indexOf("opera") != -1); var contentStyle = oSelf._oContainer._oContent.style; contentStyle.width = (!isOpera) ? null : ""; contentStyle.height = (!isOpera) ? null : ""; var sCurQuery = decodeURIComponent(sQuery); oSelf._sCurQuery = sCurQuery; oSelf._bItemSelected = false; if(oSelf._maxResultsDisplayed != oSelf.maxResultsDisplayed) { oSelf._initList(); } var nItems = Math.min(aResults.length,oSelf.maxResultsDisplayed); oSelf._nDisplayedItems = nItems; if(nItems > 0) { oSelf._initContainerHelpers(); var aItems = oSelf._aListItems; // Fill items with data for(var i = nItems-1; i >= 0; i--) { var oItemi = aItems[i]; var oResultItemi = aResults[i]; oItemi.innerHTML = oSelf.formatResult(oResultItemi, sCurQuery); oItemi.style.display = "list-item"; oItemi._sResultKey = oResultItemi[0]; oItemi._oResultData = oResultItemi; } // Empty out remaining items if any for(var j = aItems.length-1; j >= nItems ; j--) { var oItemj = aItems[j]; oItemj.innerHTML = null; oItemj.style.display = "none"; oItemj._sResultKey = null; oItemj._oResultData = null; } // Expand the container var ok = oSelf.doBeforeExpandContainer(oSelf._oTextbox, oSelf._oContainer, sQuery, aResults); oSelf._toggleContainer(ok); if(oSelf.autoHighlight) { // Go to the first item var oFirstItem = aItems[0]; oSelf._toggleHighlight(oFirstItem,"to"); oSelf.itemArrowToEvent.fire(oSelf, oFirstItem); YAHOO.log("Arrowed to first item", "info", oSelf.toString()); oSelf._typeAhead(oFirstItem,sQuery); } else { oSelf._oCurItem = null; } } else { oSelf._toggleContainer(false); } oSelf.dataReturnEvent.fire(oSelf, sQuery, aResults); YAHOO.log("Container populated with list items", "info", oSelf.toString()); }; /** * When forceSelection is true and the user attempts * leave the text input box without selecting an item from the query results, * the user selection is cleared. * * @method _clearSelection * @private */ YAHOO.widget.AutoComplete.prototype._clearSelection = function() { var sValue = this._oTextbox.value; var sChar = (this.delimChar) ? this.delimChar[0] : null; var nIndex = (sChar) ? sValue.lastIndexOf(sChar, sValue.length-2) : -1; if(nIndex > -1) { this._oTextbox.value = sValue.substring(0,nIndex); } else { this._oTextbox.value = ""; } this._sSavedQuery = this._oTextbox.value; // Fire custom event this.selectionEnforceEvent.fire(this); YAHOO.log("Selection enforced", "info", this.toString()); }; /** * Whether or not user-typed value in the text input box matches any of the * query results. * * @method _textMatchesOption * @return {HTMLElement} Matching list item element if user-input text matches * a result, null otherwise. * @private */ YAHOO.widget.AutoComplete.prototype._textMatchesOption = function() { var foundMatch = null; for(var i = this._nDisplayedItems-1; i >= 0 ; i--) { var oItem = this._aListItems[i]; var sMatch = oItem._sResultKey.toLowerCase(); if(sMatch == this._sCurQuery.toLowerCase()) { foundMatch = oItem; break; } } return(foundMatch); }; /** * Updates in the text input box with the first query result as the user types, * selecting the substring that the user has not typed. * * @method _typeAhead * @param oItem {HTMLElement} The <li> element item whose data populates the input field. * @param sQuery {String} Query string. * @private */ YAHOO.widget.AutoComplete.prototype._typeAhead = function(oItem, sQuery) { // Don't update if turned off if(!this.typeAhead || (this._nKeyCode == 8)) { return; } var oTextbox = this._oTextbox; var sValue = this._oTextbox.value; // any saved queries plus what user has typed // Don't update with type-ahead if text selection is not supported if(!oTextbox.setSelectionRange && !oTextbox.createTextRange) { return; } // Select the portion of text that the user has not typed var nStart = sValue.length; this._updateValue(oItem); var nEnd = oTextbox.value.length; this._selectText(oTextbox,nStart,nEnd); var sPrefill = oTextbox.value.substr(nStart,nEnd); this.typeAheadEvent.fire(this,sQuery,sPrefill); YAHOO.log("Typeahead occured with prefill string \"" + sPrefill + "\"", "info", this.toString()); }; /** * Selects text in the input field. * * @method _selectText * @param oTextbox {HTMLElement} Text input box element in which to select text. * @param nStart {Number} Starting index of text string to select. * @param nEnd {Number} Ending index of text selection. * @private */ YAHOO.widget.AutoComplete.prototype._selectText = function(oTextbox, nStart, nEnd) { if(oTextbox.setSelectionRange) { // For Mozilla oTextbox.setSelectionRange(nStart,nEnd); } else if(oTextbox.createTextRange) { // For IE var oTextRange = oTextbox.createTextRange(); oTextRange.moveStart("character", nStart); oTextRange.moveEnd("character", nEnd-oTextbox.value.length); oTextRange.select(); } else { oTextbox.select(); } }; /** * Syncs results container with its helpers. * * @method _toggleContainerHelpers * @param bShow {Boolean} True if container is expanded, false if collapsed * @private */ YAHOO.widget.AutoComplete.prototype._toggleContainerHelpers = function(bShow) { var bFireEvent = false; var width = this._oContainer._oContent.offsetWidth + "px"; var height = this._oContainer._oContent.offsetHeight + "px"; if(this.useIFrame && this._oContainer._oIFrame) { bFireEvent = true; if(bShow) { this._oContainer._oIFrame.style.width = width; this._oContainer._oIFrame.style.height = height; } else { this._oContainer._oIFrame.style.width = 0; this._oContainer._oIFrame.style.height = 0; } } if(this.useShadow && this._oContainer._oShadow) { bFireEvent = true; if(bShow) { this._oContainer._oShadow.style.width = width; this._oContainer._oShadow.style.height = height; } else { this._oContainer._oShadow.style.width = 0; this._oContainer._oShadow.style.height = 0; } } }; /** * Animates expansion or collapse of the container. * * @method _toggleContainer * @param bShow {Boolean} True if container should be expanded, false if container should be collapsed * @private */ YAHOO.widget.AutoComplete.prototype._toggleContainer = function(bShow) { var oContainer = this._oContainer; // Implementer has container always open so don't mess with it if(this.alwaysShowContainer && this._bContainerOpen) { return; } // Clear contents of container if(!bShow) { this._oContainer._oContent.scrollTop = 0; var aItems = this._aListItems; if(aItems && (aItems.length > 0)) { for(var i = aItems.length-1; i >= 0 ; i--) { aItems[i].style.display = "none"; } } if(this._oCurItem) { this._toggleHighlight(this._oCurItem,"from"); } this._oCurItem = null; this._nDisplayedItems = 0; this._sCurQuery = null; } // Container is already closed if(!bShow && !this._bContainerOpen) { oContainer._oContent.style.display = "none"; return; } // If animation is enabled... var oAnim = this._oAnim; if(oAnim && oAnim.getEl() && (this.animHoriz || this.animVert)) { // If helpers need to be collapsed, do it right away... // but if helpers need to be expanded, wait until after the container expands if(!bShow) { this._toggleContainerHelpers(bShow); } if(oAnim.isAnimated()) { oAnim.stop(); } // Clone container to grab current size offscreen var oClone = oContainer._oContent.cloneNode(true); oContainer.appendChild(oClone); oClone.style.top = "-9000px"; oClone.style.display = "block"; // Current size of the container is the EXPANDED size var wExp = oClone.offsetWidth; var hExp = oClone.offsetHeight; // Calculate COLLAPSED sizes based on horiz and vert anim var wColl = (this.animHoriz) ? 0 : wExp; var hColl = (this.animVert) ? 0 : hExp; // Set animation sizes oAnim.attributes = (bShow) ? {width: { to: wExp }, height: { to: hExp }} : {width: { to: wColl}, height: { to: hColl }}; // If opening anew, set to a collapsed size... if(bShow && !this._bContainerOpen) { oContainer._oContent.style.width = wColl+"px"; oContainer._oContent.style.height = hColl+"px"; } // Else, set it to its last known size. else { oContainer._oContent.style.width = wExp+"px"; oContainer._oContent.style.height = hExp+"px"; } oContainer.removeChild(oClone); oClone = null; var oSelf = this; var onAnimComplete = function() { // Finish the collapse oAnim.onComplete.unsubscribeAll(); if(bShow) { oSelf.containerExpandEvent.fire(oSelf); YAHOO.log("Container expanded", "info", oSelf.toString()); } else { oContainer._oContent.style.display = "none"; oSelf.containerCollapseEvent.fire(oSelf); YAHOO.log("Container collapsed", "info", oSelf.toString()); } oSelf._toggleContainerHelpers(bShow); }; // Display container and animate it oContainer._oContent.style.display = "block"; oAnim.onComplete.subscribe(onAnimComplete); oAnim.animate(); this._bContainerOpen = bShow; } // Else don't animate, just show or hide else { if(bShow) { oContainer._oContent.style.display = "block"; this.containerExpandEvent.fire(this); YAHOO.log("Container expanded", "info", this.toString()); } else { oContainer._oContent.style.display = "none"; this.containerCollapseEvent.fire(this); YAHOO.log("Container collapsed", "info", this.toString()); } this._toggleContainerHelpers(bShow); this._bContainerOpen = bShow; } }; /** * Toggles the highlight on or off for an item in the container, and also cleans * up highlighting of any previous item. * * @method _toggleHighlight * @param oNewItem {HTMLElement} The <li> element item to receive highlight behavior. * @param sType {String} Type "mouseover" will toggle highlight on, and "mouseout" will toggle highlight off. * @private */ YAHOO.widget.AutoComplete.prototype._toggleHighlight = function(oNewItem, sType) { var sHighlight = this.highlightClassName; if(this._oCurItem) { // Remove highlight from old item YAHOO.util.Dom.removeClass(this._oCurItem, sHighlight); } if((sType == "to") && sHighlight) { // Apply highlight to new item YAHOO.util.Dom.addClass(oNewItem, sHighlight); this._oCurItem = oNewItem; } }; /** * Toggles the pre-highlight on or off for an item in the container. * * @method _togglePrehighlight * @param oNewItem {HTMLElement} The <li> element item to receive highlight behavior. * @param sType {String} Type "mouseover" will toggle highlight on, and "mouseout" will toggle highlight off. * @private */ YAHOO.widget.AutoComplete.prototype._togglePrehighlight = function(oNewItem, sType) { if(oNewItem == this._oCurItem) { return; } var sPrehighlight = this.prehighlightClassName; if((sType == "mouseover") && sPrehighlight) { // Apply prehighlight to new item YAHOO.util.Dom.addClass(oNewItem, sPrehighlight); } else { // Remove prehighlight from old item YAHOO.util.Dom.removeClass(oNewItem, sPrehighlight); } }; /** * Updates the text input box value with selected query result. If a delimiter * has been defined, then the value gets appended with the delimiter. * * @method _updateValue * @param oItem {HTMLElement} The <li> element item with which to update the value. * @private */ YAHOO.widget.AutoComplete.prototype._updateValue = function(oItem) { var oTextbox = this._oTextbox; var sDelimChar = (this.delimChar) ? (this.delimChar[0] || this.delimChar) : null; var sSavedQuery = this._sSavedQuery; var sResultKey = oItem._sResultKey; oTextbox.focus(); // First clear text field oTextbox.value = ""; // Grab data to put into text field if(sDelimChar) { if(sSavedQuery) { oTextbox.value = sSavedQuery; } oTextbox.value += sResultKey + sDelimChar; if(sDelimChar != " ") { oTextbox.value += " "; } } else { oTextbox.value = sResultKey; } // scroll to bottom of textarea if necessary if(oTextbox.type == "textarea") { oTextbox.scrollTop = oTextbox.scrollHeight; } // move cursor to end var end = oTextbox.value.length; this._selectText(oTextbox,end,end); this._oCurItem = oItem; }; /** * Selects a result item from the container * * @method _selectItem * @param oItem {HTMLElement} The selected <li> element item. * @private */ YAHOO.widget.AutoComplete.prototype._selectItem = function(oItem) { this._bItemSelected = true; this._updateValue(oItem); this._cancelIntervalDetection(this); this.itemSelectEvent.fire(this, oItem, oItem._oResultData); YAHOO.log("Item selected: " + YAHOO.lang.dump(oItem._oResultData), "info", this.toString()); this._toggleContainer(false); }; /** * If an item is highlighted in the container, the right arrow key jumps to the * end of the textbox and selects the highlighted item, otherwise the container * is closed. * * @method _jumpSelection * @private */ YAHOO.widget.AutoComplete.prototype._jumpSelection = function() { if(this._oCurItem) { this._selectItem(this._oCurItem); } else { this._toggleContainer(false); } }; /** * Triggered by up and down arrow keys, changes the current highlighted * <li> element item. Scrolls container if necessary. * * @method _moveSelection * @param nKeyCode {Number} Code of key pressed. * @private */ YAHOO.widget.AutoComplete.prototype._moveSelection = function(nKeyCode) { if(this._bContainerOpen) { // Determine current item's id number var oCurItem = this._oCurItem; var nCurItemIndex = -1; if(oCurItem) { nCurItemIndex = oCurItem._nItemIndex; } var nNewItemIndex = (nKeyCode == 40) ? (nCurItemIndex + 1) : (nCurItemIndex - 1); // Out of bounds if(nNewItemIndex < -2 || nNewItemIndex >= this._nDisplayedItems) { return; } if(oCurItem) { // Unhighlight current item this._toggleHighlight(oCurItem, "from"); this.itemArrowFromEvent.fire(this, oCurItem); YAHOO.log("Item arrowed from", "info", this.toString()); } if(nNewItemIndex == -1) { // Go back to query (remove type-ahead string) if(this.delimChar && this._sSavedQuery) { if(!this._textMatchesOption()) { this._oTextbox.value = this._sSavedQuery; } else { this._oTextbox.value = this._sSavedQuery + this._sCurQuery; } } else { this._oTextbox.value = this._sCurQuery; } this._oCurItem = null; return; } if(nNewItemIndex == -2) { // Close container this._toggleContainer(false); return; } var oNewItem = this._aListItems[nNewItemIndex]; // Scroll the container if necessary var oContent = this._oContainer._oContent; var scrollOn = ((YAHOO.util.Dom.getStyle(oContent,"overflow") == "auto") || (YAHOO.util.Dom.getStyle(oContent,"overflowY") == "auto")); if(scrollOn && (nNewItemIndex > -1) && (nNewItemIndex < this._nDisplayedItems)) { // User is keying down if(nKeyCode == 40) { // Bottom of selected item is below scroll area... if((oNewItem.offsetTop+oNewItem.offsetHeight) > (oContent.scrollTop + oContent.offsetHeight)) { // Set bottom of scroll area to bottom of selected item oContent.scrollTop = (oNewItem.offsetTop+oNewItem.offsetHeight) - oContent.offsetHeight; } // Bottom of selected item is above scroll area... else if((oNewItem.offsetTop+oNewItem.offsetHeight) < oContent.scrollTop) { // Set top of selected item to top of scroll area oContent.scrollTop = oNewItem.offsetTop; } } // User is keying up else { // Top of selected item is above scroll area if(oNewItem.offsetTop < oContent.scrollTop) { // Set top of scroll area to top of selected item this._oContainer._oContent.scrollTop = oNewItem.offsetTop; } // Top of selected item is below scroll area else if(oNewItem.offsetTop > (oContent.scrollTop + oContent.offsetHeight)) { // Set bottom of selected item to bottom of scroll area this._oContainer._oContent.scrollTop = (oNewItem.offsetTop+oNewItem.offsetHeight) - oContent.offsetHeight; } } } this._toggleHighlight(oNewItem, "to"); this.itemArrowToEvent.fire(this, oNewItem); YAHOO.log("Item arrowed to", "info", this.toString()); if(this.typeAhead) { this._updateValue(oNewItem); } } }; ///////////////////////////////////////////////////////////////////////////// // // Private event handlers // ///////////////////////////////////////////////////////////////////////////// /** * Handles <li> element mouseover events in the container. * * @method _onItemMouseover * @param v {HTMLEvent} The mouseover event. * @param oSelf {YAHOO.widget.AutoComplete} The AutoComplete instance. * @private */ YAHOO.widget.AutoComplete.prototype._onItemMouseover = function(v,oSelf) { if(oSelf.prehighlightClassName) { oSelf._togglePrehighlight(this,"mouseover"); } else { oSelf._toggleHighlight(this,"to"); } oSelf.itemMouseOverEvent.fire(oSelf, this); YAHOO.log("Item moused over", "info", oSelf.toString()); }; /** * Handles <li> element mouseout events in the container. * * @method _onItemMouseout * @param v {HTMLEvent} The mouseout event. * @param oSelf {YAHOO.widget.AutoComplete} The AutoComplete instance. * @private */ YAHOO.widget.AutoComplete.prototype._onItemMouseout = function(v,oSelf) { if(oSelf.prehighlightClassName) { oSelf._togglePrehighlight(this,"mouseout"); } else { oSelf._toggleHighlight(this,"from"); } oSelf.itemMouseOutEvent.fire(oSelf, this); YAHOO.log("Item moused out", "info", oSelf.toString()); }; /** * Handles <li> element click events in the container. * * @method _onItemMouseclick * @param v {HTMLEvent} The click event. * @param oSelf {YAHOO.widget.AutoComplete} The AutoComplete instance. * @private */ YAHOO.widget.AutoComplete.prototype._onItemMouseclick = function(v,oSelf) { // In case item has not been moused over oSelf._toggleHighlight(this,"to"); oSelf._selectItem(this); }; /** * Handles container mouseover events. * * @method _onContainerMouseover * @param v {HTMLEvent} The mouseover event. * @param oSelf {YAHOO.widget.AutoComplete} The AutoComplete instance. * @private */ YAHOO.widget.AutoComplete.prototype._onContainerMouseover = function(v,oSelf) { oSelf._bOverContainer = true; }; /** * Handles container mouseout events. * * @method _onContainerMouseout * @param v {HTMLEvent} The mouseout event. * @param oSelf {YAHOO.widget.AutoComplete} The AutoComplete instance. * @private */ YAHOO.widget.AutoComplete.prototype._onContainerMouseout = function(v,oSelf) { oSelf._bOverContainer = false; // If container is still active if(oSelf._oCurItem) { oSelf._toggleHighlight(oSelf._oCurItem,"to"); } }; /** * Handles container scroll events. * * @method _onContainerScroll * @param v {HTMLEvent} The scroll event. * @param oSelf {YAHOO.widget.AutoComplete} The AutoComplete instance. * @private */ YAHOO.widget.AutoComplete.prototype._onContainerScroll = function(v,oSelf) { oSelf._oTextbox.focus(); }; /** * Handles container resize events. * * @method _onContainerResize * @param v {HTMLEvent} The resize event. * @param oSelf {YAHOO.widget.AutoComplete} The AutoComplete instance. * @private */ YAHOO.widget.AutoComplete.prototype._onContainerResize = function(v,oSelf) { oSelf._toggleContainerHelpers(oSelf._bContainerOpen); }; /** * Handles textbox keydown events of functional keys, mainly for UI behavior. * * @method _onTextboxKeyDown * @param v {HTMLEvent} The keydown event. * @param oSelf {YAHOO.widget.AutoComplete} The AutoComplete instance. * @private */ YAHOO.widget.AutoComplete.prototype._onTextboxKeyDown = function(v,oSelf) { var nKeyCode = v.keyCode; switch (nKeyCode) { case 9: // tab // select an item or clear out if(oSelf._oCurItem) { if(oSelf.delimChar && (oSelf._nKeyCode != nKeyCode)) { if(oSelf._bContainerOpen) { YAHOO.util.Event.stopEvent(v); } } oSelf._selectItem(oSelf._oCurItem); } else { oSelf._toggleContainer(false); } break; case 13: // enter var isMac = (navigator.userAgent.toLowerCase().indexOf("mac") != -1); if(!isMac) { if(oSelf._oCurItem) { if(oSelf._nKeyCode != nKeyCode) { if(oSelf._bContainerOpen) { YAHOO.util.Event.stopEvent(v); } } oSelf._selectItem(oSelf._oCurItem); } else { oSelf._toggleContainer(false); } } break; case 27: // esc oSelf._toggleContainer(false); return; case 39: // right oSelf._jumpSelection(); break; case 38: // up YAHOO.util.Event.stopEvent(v); oSelf._moveSelection(nKeyCode); break; case 40: // down YAHOO.util.Event.stopEvent(v); oSelf._moveSelection(nKeyCode); break; default: break; } }; /** * Handles textbox keypress events. * @method _onTextboxKeyPress * @param v {HTMLEvent} The keypress event. * @param oSelf {YAHOO.widget.AutoComplete} The AutoComplete instance. * @private */ YAHOO.widget.AutoComplete.prototype._onTextboxKeyPress = function(v,oSelf) { var nKeyCode = v.keyCode; //Expose only to Mac browsers, where stopEvent is ineffective on keydown events (bug 790337) var isMac = (navigator.userAgent.toLowerCase().indexOf("mac") != -1); if(isMac) { switch (nKeyCode) { case 9: // tab if(oSelf._oCurItem) { if(oSelf.delimChar && (oSelf._nKeyCode != nKeyCode)) { YAHOO.util.Event.stopEvent(v); } } break; case 13: // enter if(oSelf._oCurItem) { if(oSelf._nKeyCode != nKeyCode) { if(oSelf._bContainerOpen) { YAHOO.util.Event.stopEvent(v); } } oSelf._selectItem(oSelf._oCurItem); } else { oSelf._toggleContainer(false); } break; case 38: // up case 40: // down YAHOO.util.Event.stopEvent(v); break; default: break; } } //TODO: (?) limit only to non-IE, non-Mac-FF for Korean IME support (bug 811948) // Korean IME detected else if(nKeyCode == 229) { oSelf._queryInterval = setInterval(function() { oSelf._onIMEDetected(oSelf); },500); } }; /** * Handles textbox keyup events that trigger queries. * * @method _onTextboxKeyUp * @param v {HTMLEvent} The keyup event. * @param oSelf {YAHOO.widget.AutoComplete} The AutoComplete instance. * @private */ YAHOO.widget.AutoComplete.prototype._onTextboxKeyUp = function(v,oSelf) { // Check to see if any of the public properties have been updated oSelf._initProps(); var nKeyCode = v.keyCode; oSelf._nKeyCode = nKeyCode; var sText = this.value; //string in textbox // Filter out chars that don't trigger queries if(oSelf._isIgnoreKey(nKeyCode) || (sText.toLowerCase() == oSelf._sCurQuery)) { return; } else { oSelf._bItemSelected = false; YAHOO.util.Dom.removeClass(oSelf._oCurItem, oSelf.highlightClassName); oSelf._oCurItem = null; oSelf.textboxKeyEvent.fire(oSelf, nKeyCode); YAHOO.log("Textbox keyed", "info", oSelf.toString()); } // Set timeout on the request if(oSelf.queryDelay > 0) { var nDelayID = setTimeout(function(){oSelf._sendQuery(sText);},(oSelf.queryDelay * 1000)); if(oSelf._nDelayID != -1) { clearTimeout(oSelf._nDelayID); } oSelf._nDelayID = nDelayID; } else { // No delay so send request immediately oSelf._sendQuery(sText); } }; /** * Handles text input box receiving focus. * * @method _onTextboxFocus * @param v {HTMLEvent} The focus event. * @param oSelf {YAHOO.widget.AutoComplete} The AutoComplete instance. * @private */ YAHOO.widget.AutoComplete.prototype._onTextboxFocus = function (v,oSelf) { oSelf._oTextbox.setAttribute("autocomplete","off"); oSelf._bFocused = true; if(!oSelf._bItemSelected) { oSelf.textboxFocusEvent.fire(oSelf); YAHOO.log("Textbox focused", "info", oSelf.toString()); } }; /** * Handles text input box losing focus. * * @method _onTextboxBlur * @param v {HTMLEvent} The focus event. * @param oSelf {YAHOO.widget.AutoComplete} The AutoComplete instance. * @private */ YAHOO.widget.AutoComplete.prototype._onTextboxBlur = function (v,oSelf) { // Don't treat as a blur if it was a selection via mouse click if(!oSelf._bOverContainer || (oSelf._nKeyCode == 9)) { // Current query needs to be validated as a selection if(!oSelf._bItemSelected) { var oMatch = oSelf._textMatchesOption(); // Container is closed or current query doesn't match any result if(!oSelf._bContainerOpen || (oSelf._bContainerOpen && (oMatch === null))) { // Force selection is enabled so clear the current query if(oSelf.forceSelection) { oSelf._clearSelection(); } // Treat current query as a valid selection else { oSelf.unmatchedItemSelectEvent.fire(oSelf); YAHOO.log("Unmatched item selected", "info", oSelf.toString()); } } // Container is open and current query matches a result else { // Force a selection when textbox is blurred with a match if(oSelf.forceSelection) { oSelf._selectItem(oMatch); } } } if(oSelf._bContainerOpen) { oSelf._toggleContainer(false); } oSelf._cancelIntervalDetection(oSelf); oSelf._bFocused = false; oSelf.textboxBlurEvent.fire(oSelf); YAHOO.log("Textbox blurred", "info", oSelf.toString()); } }; /** * Handles window unload event. * * @method _onWindowUnload * @param v {HTMLEvent} The unload event. * @param oSelf {YAHOO.widget.AutoComplete} The AutoComplete instance. * @private */ YAHOO.widget.AutoComplete.prototype._onWindowUnload = function(v,oSelf) { if(oSelf && oSelf._oTextbox && oSelf.allowBrowserAutocomplete) { oSelf._oTextbox.setAttribute("autocomplete","on"); } };

Yahoo! UI Library

AutoComplete Widget 2.4.1

Modules

Classes

Files