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// Copyright (c) 2009 Katsuhisa Yuasa <berupon [at] gmail.com> |
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// License http://www.opensource.org/licenses/mit-license.html |
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// |
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// Inspired by suggest.js http://www.enjoyxstudy.com/javascript/suggest/ |
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// |
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|
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InputAssist = function (elem) { |
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this.init.apply(this, arguments); |
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}; |
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|
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InputAssist.prototype = { |
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|
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init : function (elem) { |
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this.elem = elem; |
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this.listElem = null; |
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this.oldValue = elem.value; |
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this.timer = null; |
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this.interval = 300; |
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this.listClassName = "assist_list"; |
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this.listItemClassName = "item"; |
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this.activeListItemClassName = "active"; |
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this.listActiveIndex = -1; |
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this.dataList = new Array(); |
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this.matchedDataList = new Array(); |
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|
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elem.observe("focus", this.onFocus.bind(this)); |
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elem.observe("blur", this.onBlur.bind(this)); |
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|
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elem.observe("keydown", this.onKeyDown.bind(this)); |
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var keyevent = (Prototype.Browser.Opera || Prototype.Browser.Gecko) ? 'keypress' : 'keyup'; |
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elem.observe(keyevent, this.onKeyUp.bind(this)); |
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document.observe('mousemove', this.onMouseMove.bind(this)); |
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}, |
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|
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onFocus : function (e) { |
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var elem = Event.element(e); |
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this.createListElem(); |
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}, |
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|
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onBlur : function (e) { |
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this.hideList(); |
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if (this.timer) { |
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clearTimeout(this.timer); |
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this.timer = null; |
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} |
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}, |
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|
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onKeyDown : function (e) { |
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switch (e.keyCode) { |
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case 9: // tab |
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if (1 |
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&& this.matchedDataList.length |
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&& this.listActiveIndex >= 0 |
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&& this.listActiveIndex < this.matchedDataList.length |
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) { |
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this.selectData(this.listActiveIndex); |
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break; |
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} |
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case 13: // enter |
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if (1 |
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&& this.matchedDataList.length |
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&& this.listActiveIndex >= 0 |
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&& this.listActiveIndex < this.matchedDataList.length |
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) { |
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this.selectData(this.listActiveIndex, true); |
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Event.stop(e); |
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break; |
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} |
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break; |
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} |
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}, |
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|
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selectData : function (idx, bFocus) { |
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setTimeout( |
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function () { |
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this.hideList(); |
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this.setData(this.matchedDataList[idx]); |
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this.oldValue = this.elem.value; |
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this.listActiveIndex = -1; |
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if (bFocus) { |
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this.elem.focus(); |
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} |
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}.bind(this), |
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10 |
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); |
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}, |
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|
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onKeyUp : function (e) { |
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if (this.timer) { |
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switch (e.keyCode) { |
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case 16: // shift |
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case 17: // ctrl |
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case 18: // alt |
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break; |
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default: |
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clearTimeout(this.timer); |
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} |
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} |
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switch (e.keyCode) { |
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case 37: // left |
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break; |
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case 38: // up |
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this.shiftItemFocus(-1); |
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break; |
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case 39: // right |
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break; |
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case 40: // down |
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if (e.altKey) { |
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this.oldValue = ""; |
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this.onTimer(); |
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}else { |
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this.shiftItemFocus(1); |
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} |
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break; |
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case 27: // esc |
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this.hideList(); |
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break; |
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case 13: // enter |
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case 9: // tab |
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case 16: // shift |
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case 17: // ctrl |
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case 18: // alt |
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break; |
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case 8: // backspace |
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case 46: // delete |
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if (this.elem.value == "") { |
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this.onTimer(); |
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break; |
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} |
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default: |
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if (!e.altKey && !e.ctrlKey) { |
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if (this.oldValue == "") { |
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this.timer = setTimeout(this.onTimer.bind(this), this.interval/10); |
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}else { |
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this.timer = setTimeout(this.onTimer.bind(this), this.interval); |
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} |
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} |
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break; |
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} |
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}, |
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|
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onMouseMove : function (e) { |
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if (!this.listElem) { |
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return; |
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} |
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var nodes = this.listElem.childNodes; |
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if (nodes.length == 0) { |
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return; |
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} |
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var x = Event.pointerX(e); |
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var y = Event.pointerY(e); |
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var listItems = this.listElem.childNodes; |
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for (var i=0; i<listItems.length; ++i) { |
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var elem = listItems[i]; |
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if (Position.within(elem, x, y)) { |
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this.moveItemFocus(i); |
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break; |
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} |
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} |
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|
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}, |
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|
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shiftItemFocus : function (shift) { |
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if (!Element.visible(this.listElem)) { |
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return; |
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} |
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var nodes = this.listElem.childNodes; |
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if (nodes.length == 0) { |
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return; |
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} |
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var newActiveIndex = -1; |
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if (this.listActiveIndex == -1) { |
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if (shift < 0) { |
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newActiveIndex = nodes.length - 1; |
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}else { |
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newActiveIndex = 0; |
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} |
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}else { |
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newActiveIndex = this.listActiveIndex + shift; |
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if (newActiveIndex >= nodes.length) { |
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newActiveIndex = -1; |
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} |
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} |
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this.moveItemFocus(newActiveIndex); |
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}, |
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|
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moveItemFocus : function (newActiveIndex) { |
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if (this.listActiveIndex != newActiveIndex) { |
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var nodes = this.listElem.childNodes; |
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if (this.listActiveIndex != -1 && this.listActiveIndex < nodes.length) { |
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Element.removeClassName(nodes[this.listActiveIndex], this.activeListItemClassName); |
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} |
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if (newActiveIndex != -1) { |
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if (newActiveIndex < 0) { |
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alert(1); |
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} |
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Element.addClassName(nodes[newActiveIndex], this.activeListItemClassName); |
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} |
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this.listActiveIndex = newActiveIndex; |
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} |
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}, |
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|
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onTimer : function () { |
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if (this.elem.value.length == 0) { |
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this.hideList(); |
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return; |
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} |
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if (this.elem != document.activeElement) { |
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return; |
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} |
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if (this.elem.value == this.oldValue) { |
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return; |
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} |
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this.setList(); |
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this.oldValue = this.elem.value; |
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this.timer = setTimeout(this.onTimer.bind(this), this.interval); |
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}, |
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onMouseDown : function(e) { |
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var x = Event.pointerX(e); |
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var y = Event.pointerY(e); |
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var listItems = this.listElem.childNodes; |
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for (var i=0; i<listItems.length; ++i) { |
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var elem = listItems[i]; |
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if (Position.within(elem, x, y)) { |
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this.selectData(i, true); |
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break; |
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} |
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} |
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}, |
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|
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createListElem : function () { |
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if (this.listElem) { |
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return; |
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} |
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var listElem = document.createElement('DIV'); |
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listElem.className = this.listClassName; |
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Element.hide(listElem); |
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Event.observe(listElem, "mousedown", this.onMouseDown.bind(this)); |
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this.listElem = listElem; |
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this.elem.parentNode.insertBefore(listElem, this.elem.nextSibling); |
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}, |
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|
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addListElemItem : function (html) { |
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var listItem = document.createElement('DIV'); |
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listItem.className = this.listItemClassName; |
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listItem.innerHTML = html; |
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this.listElem.appendChild(listItem); |
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}, |
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setList : function () { |
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if (!this.listElem) { |
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return; |
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} |
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if (this.listElem.childNodes) { |
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for (var i=this.listElem.childNodes.length-1; i>=0; --i) { |
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this.listElem.removeChild(this.listElem.childNodes[i]); |
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} |
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} |
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this.dataList = this.provideDataList(); |
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this.matchedDataList = new Array(); |
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var results = new Array(); |
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for (var i=0; i<this.dataList.length; ++i) { |
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var data = this.dataList[i]; |
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var result = this.matchData(data); |
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if (result) { |
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this.matchedDataList.push(data); |
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results.push(result); |
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} |
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} |
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if (results.length != 0) { |
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for (var i=0; i<results.length; ++i) { |
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this.addListElemItem(results[i]); |
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} |
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var style = this.listElem.style; |
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var offset = Element.cumulativeOffset(this.elem); |
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style.left = offset[0] + "px"; |
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style.top = (offset[1] + this.elem.offsetHeight) + "px"; |
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style.minWidth = this.elem.offsetWidth + "px"; |
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Element.show(this.listElem); |
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}else { |
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this.hideList(); |
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} |
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}, |
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|
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hideList : function () { |
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if (!this.listElem) { |
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return; |
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} |
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this.oldValue = this.elem.value; |
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this.listActiveIndex = -1; |
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Element.hide(this.listElem); |
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} |
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|
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}; |
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