https://alpenrouten.de/lib/js/jquery.autocomplete.js

1/**
2*  Ajax Autocomplete for jQuery, version 1.1.3
3*  (c) 2010 Tomas Kirda
4*
5*  Ajax Autocomplete for jQuery is freely distributable under the terms of an MIT-style license.
6*  For details, see the web site: http://www.devbridge.com/projects/autocomplete/jquery/
7*
8*  Last Review: 04/19/2010
9*/
10
11/*jslint onevar: true, evil: true, nomen: true, eqeqeq: true, bitwise: true, regexp: true, newcap: true, immed: true */
12/*global window: true, document: true, clearInterval: true, setInterval: true, jQuery: true */
13
14(function($) {
15
16  var reEscape = new RegExp('(\\' + ['/', '.', '*', '+', '?', '|', '(', ')', '[', ']', '{', '}', '\\'].join('|\\') + ')', 'g');
17
18  function fnFormatResult(value, data, currentValue) {
19    var pattern = '(' + currentValue.replace(reEscape, '\\$1') + ')';
20    return value.replace(new RegExp(pattern, 'gi'), '<strong>$1<\/strong>');
21  }
22
23  function Autocomplete(el, options) {
24    this.el = $(el);
25    this.el.attr('autocomplete', 'off');
26    this.suggestions = [];
27    this.data = [];
28    this.badQueries = [];
29    this.selectedIndex = -1;
30    this.currentValue = this.el.val();
31    this.intervalId = 0;
32    this.cachedResponse = [];
33    this.onChangeInterval = null;
34    this.ignoreValueChange = false;
35    this.serviceUrl = options.serviceUrl;
36    this.isLocal = false;
37    this.options = {
38      autoSubmit: false,
39      minChars: 1,
40      maxHeight: 300,
41      deferRequestBy: 0,
42      width: 0,
43      highlight: true,
44      params: {},
45      fnFormatResult: fnFormatResult,
46      delimiter: null,
47      zIndex: 9999
48    };
49    this.initialize();
50    this.setOptions(options);
51  }
52  
53  $.fn.autocomplete = function(options) {
54    return new Autocomplete(this.get(0)||$('<input />'), options);
55  };
56
57
58  Autocomplete.prototype = {
59
60    killerFn: null,
61
62    initialize: function() {
63
64      var me, uid, autocompleteElId;
65      me = this;
66      uid = Math.floor(Math.random()*0x100000).toString(16);
67      autocompleteElId = 'Autocomplete_' + uid;
68
69      this.killerFn = function(e) {
70        if ($(e.target).parents('.autocomplete').size() === 0) {
71          me.killSuggestions();
72          me.disableKillerFn();
73        }
74      };
75
76      if (!this.options.width) { this.options.width = this.el.width(); }
77      this.mainContainerId = 'AutocompleteContainter_' + uid;
78
79      $('<div id="' + this.mainContainerId + '" style="position:absolute;z-index:9999;"><div class="autocomplete-w1"><div class="autocomplete" id="' + autocompleteElId + '" style="display:none; width:300px;"></div></div></div>').appendTo('body');
80
81      this.container = $('#' + autocompleteElId);
82      this.fixPosition();
83      if (window.opera) {
84        this.el.keypress(function(e) { me.onKeyPress(e); });
85      } else {
86        this.el.keydown(function(e) { me.onKeyPress(e); });
87      }
88      this.el.keyup(function(e) { me.onKeyUp(e); });
89      this.el.blur(function() { me.enableKillerFn(); });
90      this.el.focus(function() { me.fixPosition(); });
91    },
92    
93    setOptions: function(options){
94      var o = this.options;
95      $.extend(o, options);
96      if(o.lookup){
97        this.isLocal = true;
98        if($.isArray(o.lookup)){ o.lookup = { suggestions:o.lookup, data:[] }; }
99      }
100      $('#'+this.mainContainerId).css({ zIndex:o.zIndex });
101      this.container.css({ maxHeight: o.maxHeight + 'px', width:o.width });
102    },
103    
104    clearCache: function(){
105      this.cachedResponse = [];
106      this.badQueries = [];
107    },
108    
109    disable: function(){
110      this.disabled = true;
111    },
112    
113    enable: function(){
114      this.disabled = false;
115    },
116
117    fixPosition: function() {
118      var offset = this.el.offset();
119//      $('#' + this.mainContainerId).css({ top: (offset.top + this.el.innerHeight()) + 'px', left: offset.left + 'px' });
120      $('#' + this.mainContainerId).css({ top: (offset.top + this.el.innerHeight()) + 'px', left: (offset.left - this.options.width + this.el.innerWidth()) + 'px' });
121    },
122
123    enableKillerFn: function() {
124      var me = this;
125      $(document).bind('click', me.killerFn);
126    },
127
128    disableKillerFn: function() {
129      var me = this;
130      $(document).unbind('click', me.killerFn);
131    },
132

133    killSuggestions: function() {
134      var me = this;
135      this.stopKillSuggestions();
136      this.intervalId = window.setInterval(function() { me.hide(); me.stopKillSuggestions(); }, 300);
137    },
138
139    stopKillSuggestions: function() {
140      window.clearInterval(this.intervalId);
141    },
142
143    onKeyPress: function(e) {
144      if (this.disabled || !this.enabled) { return; }
145      // return will exit the function
146      // and event will not be prevented
147      switch (e.keyCode) {
148        case 27: //KEY_ESC:
149          this.el.val(this.currentValue);
150          this.hide();
151          break;
152        case 9: //KEY_TAB:
153        case 13: //KEY_RETURN:
154          if (this.selectedIndex === -1) {
155            this.hide();
156            return;
157          }
158          this.select(this.selectedIndex);
159          if(e.keyCode === 9){ return; }
160          break;
161        case 38: //KEY_UP:
162          this.moveUp();
163          break;
164        case 40: //KEY_DOWN:
165          this.moveDown();
166          break;
167        default:
168          return;
169      }
170      e.stopImmediatePropagation();
171      e.preventDefault();
172    },
173
174    onKeyUp: function(e) {
175      if(this.disabled){ return; }
176      switch (e.keyCode) {
177        case 38: //KEY_UP:
178        case 40: //KEY_DOWN:
179          return;
180      }
181      clearInterval(this.onChangeInterval);
182      if (this.currentValue !== this.el.val()) {
183        if (this.options.deferRequestBy > 0) {
184          // Defer lookup in case when value changes very quickly:
185          var me = this;
186          this.onChangeInterval = setInterval(function() { me.onValueChange(); }, this.options.deferRequestBy);
187        } else {
188          this.onValueChange();
189        }
190      }
191    },
192
193    onValueChange: function() {
194      clearInterval(this.onChangeInterval);
195      this.currentValue = this.el.val();
196      var q = this.getQuery(this.currentValue);
197      this.selectedIndex = -1;
198      if (this.ignoreValueChange) {
199        this.ignoreValueChange = false;
200        return;
201      }
202      if (q === '' || q.length < this.options.minChars) {
203        this.hide();
204      } else {

205        this.getSuggestions(q);
206      }
207    },
208
209    getQuery: function(val) {
210      var d, arr;
211      d = this.options.delimiter;
212      if (!d) { return $.trim(val); }
213      arr = val.split(d);
214      return $.trim(arr[arr.length - 1]);
215    },
216
217    getSuggestionsLocal: function(q) {
218      var ret, arr, len, val, i;
219      arr = this.options.lookup;
220      len = arr.suggestions.length;
221      ret = { suggestions:[], data:[] };
222      q = q.toLowerCase();
223      for(i=0; i< len; i++){
224        val = arr.suggestions[i];
225        if(val.toLowerCase().indexOf(q) === 0){
226          ret.suggestions.push(val);
227          ret.data.push(arr.data[i]);
228        }
229      }
230      return ret;
231    },
232    
233    getSuggestions: function(q) {
234      var cr, me;
235      cr = this.isLocal ? this.getSuggestionsLocal(q) : this.cachedResponse[q];
236      if (cr && $.isArray(cr.suggestions)) {
237        this.suggestions = cr.suggestions;
238        this.data = cr.data;
239        this.suggest();
240      } else if (!this.isBadQuery(q)) {
241        me = this;
242        me.options.params.query = q;
243        $.get(this.serviceUrl, me.options.params, function(txt) { me.processResponse(txt); }, 'text');
244      }
245    },
246
247    isBadQuery: function(q) {
248      var i = this.badQueries.length;
249      while (i--) {
250        if (q.indexOf(this.badQueries[i]) === 0) { return true; }
251      }
252      return false;
253    },
254
255    hide: function() {
256      this.enabled = false;
257      this.selectedIndex = -1;
258      this.container.hide();
259    },
260
261    suggest: function() {
262      if (this.suggestions.length === 0) {
263        this.hide();
264        return;
265      }
266
267      var me, len, div, f, v, i, s, mOver, mClick;
268      me = this;
269      len = this.suggestions.length;
270      f = this.options.fnFormatResult;
271      v = this.getQuery(this.currentValue);
272      mOver = function(xi) { return function() { me.activate(xi); }; };
273      mClick = function(xi) { return function() { me.select(xi); }; };
274      this.container.hide().empty();
275      for (i = 0; i < len; i++) {
276        s = this.suggestions[i];
277        div = $((me.selectedIndex === i ? '<div class="selected"' : '<div') + ' title="' + s + '">' + f(s, this.data[i], v) + '</div>');
278        div.mouseover(mOver(i));
279        div.click(mClick(i));
280        this.container.append(div);
281      }
282      this.enabled = true;
283      this.container.show();
284    },
285
286    processResponse: function(text) {
287      var response;
288      try {
289        response = eval('(' + text + ')');
290      } catch (err) { return; }
291      if (!$.isArray(response.data)) { response.data = []; }
292      if(!this.options.noCache){
293        this.cachedResponse[response.query] = response;
294        if (response.suggestions.length === 0) { this.badQueries.push(response.query); }
295      }
296      if (response.query === this.getQuery(this.currentValue)) {
297        this.suggestions = response.suggestions;
298        this.data = response.data;
299        this.suggest(); 
300      }
301    },
302
303    activate: function(index) {
304      var divs, activeItem;
305      divs = this.container.children();
306      // Clear previous selection:
307      if (this.selectedIndex !== -1 && divs.length > this.selectedIndex) {
308        $(divs.get(this.selectedIndex)).removeClass();
309      }
310      this.selectedIndex = index;
311      if (this.selectedIndex !== -1 && divs.length > this.selectedIndex) {
312        activeItem = divs.get(this.selectedIndex);
313        $(activeItem).addClass('selected');
314      }
315      return activeItem;
316    },
317
318    deactivate: function(div, index) {
319      div.className = '';
320      if (this.selectedIndex === index) { this.selectedIndex = -1; }
321    },
322
323    select: function(i) {
324      var selectedValue, f;
325      selectedValue = this.suggestions[i];
326      if (selectedValue) {
327        this.el.val(selectedValue);
328        if (this.options.autoSubmit) {
329          f = this.el.parents('form');
330          if (f.length > 0) { f.get(0).submit(); }
331        }
332        this.ignoreValueChange = true;
333        this.hide();
334        this.onSelect(i);
335      }
336    },
337
338    moveUp: function() {
339      if (this.selectedIndex === -1) { return; }
340      if (this.selectedIndex === 0) {
341        this.container.children().get(0).className = '';
342        this.selectedIndex = -1;
343        this.el.val(this.currentValue);
344        return;
345      }
346      this.adjustScroll(this.selectedIndex - 1);
347    },
348
349    moveDown: function() {
350      if (this.selectedIndex === (this.suggestions.length - 1)) { return; }
351      this.adjustScroll(this.selectedIndex + 1);
352    },
353
354    adjustScroll: function(i) {
355      var activeItem, offsetTop, upperBound, lowerBound;
356      activeItem = this.activate(i);
357      offsetTop = activeItem.offsetTop;
358      upperBound = this.container.scrollTop();
359      lowerBound = upperBound + this.options.maxHeight - 25;
360      if (offsetTop < upperBound) {
361        this.container.scrollTop(offsetTop);
362      } else if (offsetTop > lowerBound) {
363        this.container.scrollTop(offsetTop - this.options.maxHeight + 25);
364      }
365      this.el.val(this.getValue(this.suggestions[i]));
366    },
367
368    onSelect: function(i) {
369      var me, fn, s, d;
370      me = this;
371      fn = me.options.onSelect;
372      s = me.suggestions[i];
373      d = me.data[i];
374      me.el.val(me.getValue(s));
375      if ($.isFunction(fn)) { fn(s, d, me.el); }
376    },
377    
378    getValue: function(value){
379        var del, currVal, arr, me;
380        me = this;
381        del = me.options.delimiter;
382        if (!del) { return value; }
383        currVal = me.currentValue;
384        arr = currVal.split(del);
385        if (arr.length === 1) { return value; }
386        return currVal.substr(0, currVal.length - arr[arr.length - 1].length) + value;
387    }
388
389  };
390
391}(jQuery));