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(function ($) {
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$.fn.extend({
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"editTips": function (options) {
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var opts = $.extend({}, defaults, options);
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return this.each(function(e) {
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/*********以下为获取下拉框像素坐标方法*********/
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var Teleprompter = {
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getInputPositon: function (elem) {
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if (document.selection) { //IE Support
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elem.focus();
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var Sel = document.selection.createRange();
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return {
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left: Sel.boundingLeft,
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top: Sel.boundingTop,
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bottom: Sel.boundingTop + Sel.boundingHeight
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};
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} else {
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var that = this;
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var cloneDiv = '{$clone_div}', cloneLeft = '{$cloneLeft}', cloneFocus = '{$cloneFocus}', cloneRight = '{$cloneRight}';
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var none = '<span style="white-space:pre-wrap;"> </span>';
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var div = elem[cloneDiv] || document.createElement('div'), focus = elem[cloneFocus] || document.createElement('span');
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var text = elem[cloneLeft] || document.createElement('span');
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var offset = that._offset(elem), index = this._getFocus(elem), focusOffset = { left: 0, top: 0 };
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if (!elem[cloneDiv]) {
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elem[cloneDiv] = div, elem[cloneFocus] = focus;
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elem[cloneLeft] = text;
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div.appendChild(text);
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div.appendChild(focus);
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document.body.appendChild(div);
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focus.innerHTML = '|';
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focus.style.cssText = 'display:inline-block;width:0px;overflow:hidden;z-index:-100;word-wrap:break-word;word-break:break-all;';
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div.className = this._cloneStyle(elem);
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div.style.cssText = 'visibility:hidden;display:inline-block;position:absolute;z-index:-100;word-wrap:break-word;word-break:break-all;overflow:hidden;';
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};
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div.style.left = this._offset(elem).left + "px";
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div.style.top = this._offset(elem).top + "px";
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var strTmp = elem.value.substring(0, index).replace(/</g, '<').replace(/>/g, '>').replace(/\n/g, '<br/>').replace(/\s/g, none);
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text.innerHTML = strTmp;
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focus.style.display = 'inline-block';
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try { focusOffset = this._offset(focus); } catch (e) { };
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focus.style.display = 'none';
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return {
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left: focusOffset.left,
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top: focusOffset.top,
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bottom: focusOffset.bottom
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};
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}
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},
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// 克隆元素样式并返回类
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_cloneStyle: function (elem, cache) {
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if (!cache && elem['${cloneName}']) return elem['${cloneName}'];
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var className, name, rstyle = /^(number|string)$/;
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var rname = /^(content|outline|outlineWidth)$/; //Opera: content; IE8:outline && outlineWidth
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var cssText = [], sStyle = elem.style;
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for (name in sStyle) {
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if (!rname.test(name)) {
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val = this._getStyle(elem, name);
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if (val !== '' && rstyle.test(typeof val)) { // Firefox 4
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name = name.replace(/([A-Z])/g, "-$1").toLowerCase();
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cssText.push(name);
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cssText.push(':');
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cssText.push(val);
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cssText.push(';');
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};
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};
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};
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cssText = cssText.join('');
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elem['${cloneName}'] = className = 'clone' + (new Date).getTime();
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this._addHeadStyle('.' + className + '{' + cssText + '}');
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return className;
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},
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// 向页头插入样式
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_addHeadStyle: function (content) {
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var style = this._style[document];
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if (!style) {
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style = this._style[document] = document.createElement('style');
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document.getElementsByTagName('head')[0].appendChild(style);
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};
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style.styleSheet && (style.styleSheet.cssText += content) || style.appendChild(document.createTextNode(content));
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},
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_style: {},
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// 获取最终样式
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_getStyle: 'getComputedStyle' in window ? function (elem, name) {
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return getComputedStyle(elem, null)[name];
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} : function (elem, name) {
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return elem.currentStyle[name];
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},
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// 获取光标在文本框的位置
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_getFocus: function (elem) {
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var index = 0;
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if (document.selection) {// IE Support
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elem.focus();
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var Sel = document.selection.createRange();
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if (elem.nodeName === 'TEXTAREA') {//textarea
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var Sel2 = Sel.duplicate();
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Sel2.moveToElementText(elem);
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var index = -1;
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while (Sel2.inRange(Sel)) {
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Sel2.moveStart('character');
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index++;
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};
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}
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else if (elem.nodeName === 'INPUT') {// input
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Sel.moveStart('character', -elem.value.length);
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index = Sel.text.length;
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}
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}
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else if (elem.selectionStart || elem.selectionStart == '0') { // Firefox support
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index = elem.selectionStart;
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}
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return (index);
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},
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// 获取元素在页面中位置
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_offset: function (elem) {
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var box = elem.getBoundingClientRect(), doc = elem.ownerDocument, body = doc.body, docElem = doc.documentElement;
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var clientTop = docElem.clientTop || body.clientTop || 0, clientLeft = docElem.clientLeft || body.clientLeft || 0;
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var top = box.top + (self.pageYOffset || docElem.scrollTop) - clientTop, left = box.left + (self.pageXOffset || docElem.scrollLeft) - clientLeft;
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return {
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left: left,
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top: top,
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right: left + box.width,
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bottom: top + box.height
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};
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}
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};
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/*********以下为检索方法*********/
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var _this = me = $(this);
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var e = event || window.event; // 键值兼容
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var searchStart = false; // 设置检索事件开关
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var checkCharacter = false; // 输入字符检索开关
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var oldCurrentPos = ''; // 检索值开始的位置
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var currentPos = ''; // 检索值结束的位置
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var selectVal = ''; // 检索值
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var pos = ''; // 设置光标位置
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var enterCharacter = ''; // 当前输入的字符
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var dotVal; // 输入 . 时从0到当前光标位置文本
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var dotDollerPos; // 获取往后查找离 . 最近的 $ 的下标，引文输入 . 时的检索值即dotSelectVal不包含 $ 本身，所以需要加1
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var dotSelectVal; // 输入 . 时的检索值
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// 插入下拉框
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me.dropdown = $('<ul class="tips" style="display:none;"></ul>');
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$("body").after(me.dropdown);
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me.dropdown.css({
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'width': opts.dropdownWidth,
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'position':'absolute',
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});
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// 获取当前光标位置 currentPos
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var getStart = function() {
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var all_range = '';
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if (navigator.userAgent.indexOf("MSIE") > -1) { //IE
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if( _this.get(0).tagName == "TEXTAREA" ){
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// 根据body创建textRange
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all_range = document.body.createTextRange();
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// 让textRange范围包含元素里所有内容
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all_range.moveToElementText(_this.get(0));
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} else {
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// 根据当前输入元素类型创建textRange
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all_range = _this.get(0).createTextRange();
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}
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// 输入元素获取焦点
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_this.focus();
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// 获取当前的textRange,如果当前的textRange是一个具体位置而不是范围,textRange的范围从currentPos到end.此时currentPos等于end
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var cur_range = document.selection.createRange();
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// 将当前的textRange的end向前移"选中的文本.length"个单位.保证currentPos=end
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cur_range.moveEnd('character',-cur_range.text.length)
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// 将当前textRange的currentPos移动到之前创建的textRange的currentPos处, 此时当前textRange范围变为整个内容的currentPos处到当前范围end处
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cur_range.setEndPoint("StartToStart",all_range);
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// 此时当前textRange的Start到End的长度,就是光标的位置
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currentPos = cur_range.text.length;
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} else {
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// 文本框获取焦点
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_this.focus();
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// 获取当前元素光标位置
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currentPos = _this.get(0).selectionStart;
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//console.log("光标当前位置:"+currentPos);
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}
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// 返回光标位置
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return currentPos;
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};
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// 获取检索值开始位置 oldCurrentPos
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var getOldCurrentPos = function() {
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getStart(); // 开始输入的时候的光标位置 currentPos
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oldCurrentPos = currentPos; // 储存输入开始位置
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console.log(oldCurrentPos);
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}
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// 结束检索事件
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var endSearch = function(){
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me.dropdown.empty();
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me.dropdown.hide();
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searchStart = false;
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enterCharacter ='';
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}
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// 设置光标位置
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var setCarePosition = function(start, end) {
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if (navigator.userAgent.indexOf("MSIE") > -1) {
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var all_range = '';
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if ( _this.get(0).tagName == "TEXTAREA" ) {
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// 根据body创建textRange
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all_range = document.body.createTextRange();
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// 让textRange范围包含元素里所有内容
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all_range.moveToElementText(_this.get(0));
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} else {
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// 根据当前输入元素类型创建textRange
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all_range = _this.get(0).createTextRange();
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}
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_this.focus();
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// 将textRange的start设置为想要的start
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all_range.moveStart('character',start);
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// 将textRange的end设置为想要的end. 此时我们需要的textRange长度=end-start; 所以用总长度-(end-start)就是新end所在位置
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all_range.moveEnd('character',-(all_range.text.length-(end-start)));
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// 选中从start到end间的文本,若start=end,则光标定位到start处
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all_range.select();
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} else {
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// 文本框获取焦点
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_this.focus();
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// 选中从start到end间的文本,若start=end,则光标定位到start处
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_this.get(0).setSelectionRange(start, end);
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}
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};
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// 获取检索的值 selctVal
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var getSelectVal = function(){
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var val = me.val();
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if( searchStart == true && enterCharacter != opts.levelCharacter ){ // 当输入的是字符 triggerCharacter 的时候 默认为 $
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selectVal = val.substring(oldCurrentPos,currentPos); // 检索值直接为获取的文本区域
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}
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if( searchStart == true && enterCharacter == opts.levelCharacter ){ // 当输入的是字符 levelCharacter 的时候 默认为 .
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dotVal = val.slice(0,currentPos);
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dotDollerPos = dotVal.lastIndexOf(opts.triggerCharacter)+1;
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dotSelectVal = dotVal.substring(dotDollerPos,currentPos);
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selectVal = dotSelectVal;
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console.log("到当前下标的字符串为：" + dotVal);
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console.log("到当前下标最近的$下标是：" + dotDollerPos);
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console.log("输入 . 时检索值为：" + dotSelectVal);
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}
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console.log("获取的值区域为："+oldCurrentPos+"-"+currentPos);
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if ( oldCurrentPos > currentPos ){ // 回删时清除选项li 隐藏下拉框
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endSearch()
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}
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}
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// 选中li当前项 改变输入框value值 定位光标
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var changeValue = function() {
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var val = me.val(); var valLength = val.length;
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var liTxt = me.dropdown.find(".active").text();
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var liTxtLength = liTxt.length;
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// 此处需要区分触发检索事件的符号是
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if ( enterCharacter == opts.levelCharacter ) { // 如果是 .
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var beforeSelectVal = val.substring(0, dotDollerPos);
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}
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else { // 如果是 &
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var beforeSelectVal = val.substring(0, oldCurrentPos);
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}
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var beforeSelectValLength = beforeSelectVal.length;
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var afterSelectVal = val.substring(currentPos, valLength);
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var pos = beforeSelectValLength + liTxtLength;
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val = beforeSelectVal + liTxt + afterSelectVal;
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_this.val(val);
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setCarePosition(pos, pos); // 将光标定位在插入值后面
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endSearch();
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console.log("文本长度:" + beforeSelectVal.length);
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console.log("li文本为:" + liTxt);
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console.log("前部为:" + beforeSelectVal);
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console.log("后部分为:" + afterSelectVal);
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return false;
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// 此处必须加上return false 不然会调用callbacktips 初始化 dropdown
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}
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// 定义回调函数 callbacktips
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var callbacktips = function(arr_json) {
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//1. empty body
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me.dropdown.empty();
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//2. create list
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if (arr_json) {
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for (var i = 0; i < arr_json.length; i++) {
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var n = arr_json[i].indexOf(selectVal);
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if ( n != -1 ) {
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me.dropdown.append("<li class='tips-item'>" + arr_json[i] + "</li>");
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}
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else{
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return;
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}
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};
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}
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//3. show and select first
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me.dropdown.show();
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me.dropdown.find("li:first-child").addClass("active");
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};
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// 点击当前项获取文本值 重组输入框 value值 失去焦点时隐藏下拉框 清空下拉框
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$(document).click(function(e) {
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var e = event || window.event;
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var el = e.target.localName; // 获取事件源 标签名
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el == "li" ? changeValue() : endSearch();
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})
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// 获得焦点的时候获取光标位置
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me.click(function() {
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getOldCurrentPos()
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});
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//下拉框显示时 阻止键盘方向键默认事件
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me.keydown(function(e) {
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var dropdownIsshow = me.dropdown.css("display");
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if (dropdownIsshow == "block") {
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if (e.keyCode == 38 || e.keyCode == 40 || e.keyCode == 13) {
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e.preventDefault();
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}
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}
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})
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// 监听输入框value值变化
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me.keyup(function(e) {
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if (e.keyCode >= 37 && e.keyCode <= 40) {
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reutrn;
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}
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var val = me.val();
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getStart();
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enterCharacter = val.substring(currentPos - 1, currentPos);
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checkCharacter = true;
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if (enterCharacter == opts.triggerCharacter || enterCharacter == opts.levelCharacter) {
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console.log("输入了$或者.");
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searchStart = true;
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getOldCurrentPos(); // 输入 $ 的时候重置 oldCurrentPos
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}
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getSelectVal(); // 外度调用获取检索值方法 保证实时更新 selectVal 及 searchStart
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if ( searchStart == true && checkCharacter == true && e.keyCode != 13 ) {
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console.log("获取的值:"+selectVal);
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if( $.isFunction(opts.keyPressAction) ){
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opts.keyPressAction(selectVal, function(arr_json){
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// 调用回调函数
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callbacktips(arr_json);
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});
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}
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}
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if (e.keyCode == 13) { // 按enter键选取当前li文本值 重组输入框 value值
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var dropdownIsshow = _this.dropdown.css("display");
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if ( dropdownIsshow == "block" ){ // 为了在下拉框隐藏时按 enter键 能换行，需要加上这个判断
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changeValue();
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console.log("这是点击enter后searchStart："+searchStart);
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}
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}
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console.log("这是整个事件执行完成以后："+searchStart);
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});
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// 切换当前项
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me.dropdown.on('mouseenter','li', function() {
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$(this).addClass("active").siblings().removeClass("active");
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});
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// 设置显示位置
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$(this).keyup(function() {
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setPopupPos(this);
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});
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// 调用 Teleprompter， 获取光标坐标
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function setPopupPos(el) {
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var cursorPos = Teleprompter.getInputPositon(el);
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var tleft = parseInt(me.css("marginLeft"));
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var ttop = parseInt(me.css("marginTop"));
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var dropdown = me.dropdown.get(0);
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dropdown.style.left = cursorPos.left - tleft + 'px';
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//dropdown.style.top = cursorPos.bottom - ttop + 10 + 'px';
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dropdown.style.bottom = "50px";
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}
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})
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}
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})
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var defaults = {
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triggerCharacter : '[',
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levelCharacter: '.',
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dropdownWidth:'150px'
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};
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})(window.jQuery);
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