447 lines
15 KiB
JavaScript
447 lines
15 KiB
JavaScript
// Copyright (c) 2005 Thomas Fuchs (http://script.aculo.us, http://mir.aculo.us)
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// (c) 2005 Ivan Krstic (http://blogs.law.harvard.edu/ivan)
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//
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// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to
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// permit persons to whom the Software is furnished to do so, subject to
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// the following conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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Element.collectTextNodesIgnoreClass = function(element, ignoreclass) {
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var children = $(element).childNodes;
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var text = "";
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var classtest = new RegExp("^([^ ]+ )*" + ignoreclass+ "( [^ ]+)*$","i");
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for (var i = 0; i < children.length; i++) {
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if(children[i].nodeType==3) {
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text+=children[i].nodeValue;
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} else {
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if((!children[i].className.match(classtest)) && children[i].hasChildNodes())
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text += Element.collectTextNodesIgnoreClass(children[i], ignoreclass);
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}
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}
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return text;
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}
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// Autocompleter.Base handles all the autocompletion functionality
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// that's independent of the data source for autocompletion. This
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// includes drawing the autocompletion menu, observing keyboard
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// and mouse events, and similar.
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//
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// Specific autocompleters need to provide, at the very least,
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// a getUpdatedChoices function that will be invoked every time
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// the text inside the monitored textbox changes. This method
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// should get the text for which to provide autocompletion by
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// invoking this.getEntry(), NOT by directly accessing
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// this.element.value. This is to allow incremental tokenized
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// autocompletion. Specific auto-completion logic (AJAX, etc)
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// belongs in getUpdatedChoices.
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//
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// Tokenized incremental autocompletion is enabled automatically
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// when an autocompleter is instantiated with the 'tokens' option
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// in the options parameter, e.g.:
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// new Ajax.Autocompleter('id','upd', '/url/', { tokens: ',' });
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// will incrementally autocomplete with a comma as the token.
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// Additionally, ',' in the above example can be replaced with
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// a token array, e.g. { tokens: new Array (',', '\n') } which
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// enables autocompletion on multiple tokens. This is most
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// useful when one of the tokens is \n (a newline), as it
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// allows smart autocompletion after linebreaks.
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var Autocompleter = {}
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Autocompleter.Base = function() {};
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Autocompleter.Base.prototype = {
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base_initialize: function(element, update, options) {
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this.element = $(element);
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this.update = $(update);
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this.has_focus = false;
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this.changed = false;
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this.active = false;
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this.index = 0;
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this.entry_count = 0;
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if (this.setOptions)
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this.setOptions(options);
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else
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this.options = {}
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this.options.tokens = this.options.tokens || new Array();
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this.options.frequency = this.options.frequency || 0.4;
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this.options.min_chars = this.options.min_chars || 1;
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this.options.onShow = this.options.onShow ||
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function(element, update){
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if(!update.style.position || update.style.position=='absolute') {
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update.style.position = 'absolute';
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var offsets = Position.cumulativeOffset(element);
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update.style.left = offsets[0] + 'px';
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update.style.top = (offsets[1] + element.offsetHeight) + 'px';
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update.style.width = element.offsetWidth + 'px';
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}
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new Effect.Appear(update,{duration:0.15});
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};
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this.options.onHide = this.options.onHide ||
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function(element, update){ new Effect.Fade(update,{duration:0.15}) };
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if(this.options.indicator)
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this.indicator = $(this.options.indicator);
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if (typeof(this.options.tokens) == 'string')
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this.options.tokens = new Array(this.options.tokens);
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this.observer = null;
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Element.hide(this.update);
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Event.observe(this.element, "blur", this.onBlur.bindAsEventListener(this));
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Event.observe(this.element, "keypress", this.onKeyPress.bindAsEventListener(this));
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},
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show: function() {
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if(this.update.style.display=='none') this.options.onShow(this.element, this.update);
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if(!this.iefix && (navigator.appVersion.indexOf('MSIE')>0) && this.update.style.position=='absolute') {
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new Insertion.After(this.update,
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'<iframe id="' + this.update.id + '_iefix" '+
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'style="display:none;filter:progid:DXImageTransform.Microsoft.Alpha(opacity=0);" ' +
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'src="javascript:false;" frameborder="0" scrolling="no"></iframe>');
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this.iefix = $(this.update.id+'_iefix');
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}
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if(this.iefix) {
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Position.clone(this.update, this.iefix);
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this.iefix.style.zIndex = 1;
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this.update.style.zIndex = 2;
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Element.show(this.iefix);
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}
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},
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hide: function() {
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if(this.update.style.display=='') this.options.onHide(this.element, this.update);
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if(this.iefix) Element.hide(this.iefix);
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},
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startIndicator: function() {
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if(this.indicator) Element.show(this.indicator);
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},
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stopIndicator: function() {
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if(this.indicator) Element.hide(this.indicator);
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},
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onKeyPress: function(event) {
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if(this.active)
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switch(event.keyCode) {
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case Event.KEY_TAB:
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case Event.KEY_RETURN:
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this.select_entry();
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Event.stop(event);
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case Event.KEY_ESC:
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this.hide();
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this.active = false;
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return;
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case Event.KEY_LEFT:
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case Event.KEY_RIGHT:
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return;
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case Event.KEY_UP:
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this.mark_previous();
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this.render();
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if(navigator.appVersion.indexOf('AppleWebKit')>0) Event.stop(event);
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return;
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case Event.KEY_DOWN:
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this.mark_next();
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this.render();
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if(navigator.appVersion.indexOf('AppleWebKit')>0) Event.stop(event);
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return;
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}
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else
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if(event.keyCode==Event.KEY_TAB || event.keyCode==Event.KEY_RETURN)
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return;
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this.changed = true;
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this.has_focus = true;
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if(this.observer) clearTimeout(this.observer);
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this.observer =
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setTimeout(this.onObserverEvent.bind(this), this.options.frequency*1000);
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},
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onHover: function(event) {
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var element = Event.findElement(event, 'LI');
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if(this.index != element.autocompleteIndex)
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{
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this.index = element.autocompleteIndex;
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this.render();
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}
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Event.stop(event);
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},
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onClick: function(event) {
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var element = Event.findElement(event, 'LI');
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this.index = element.autocompleteIndex;
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this.select_entry();
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Event.stop(event);
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},
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onBlur: function(event) {
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// needed to make click events working
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setTimeout(this.hide.bind(this), 250);
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this.has_focus = false;
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this.active = false;
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},
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render: function() {
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if(this.entry_count > 0) {
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for (var i = 0; i < this.entry_count; i++)
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this.index==i ?
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Element.addClassName(this.get_entry(i),"selected") :
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Element.removeClassName(this.get_entry(i),"selected");
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if(this.has_focus) {
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if(this.get_current_entry().scrollIntoView)
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this.get_current_entry().scrollIntoView(false);
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this.show();
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this.active = true;
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}
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} else this.hide();
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},
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mark_previous: function() {
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if(this.index > 0) this.index--
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else this.index = this.entry_count-1;
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},
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mark_next: function() {
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if(this.index < this.entry_count-1) this.index++
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else this.index = 0;
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},
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get_entry: function(index) {
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return this.update.firstChild.childNodes[index];
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},
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get_current_entry: function() {
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return this.get_entry(this.index);
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},
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select_entry: function() {
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this.active = false;
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value = Element.collectTextNodesIgnoreClass(this.get_current_entry(), 'informal').unescapeHTML();
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this.updateElement(value);
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this.element.focus();
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},
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updateElement: function(value) {
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var last_token_pos = this.findLastToken();
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if (last_token_pos != -1) {
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var new_value = this.element.value.substr(0, last_token_pos + 1);
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var whitespace = this.element.value.substr(last_token_pos + 1).match(/^\s+/);
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if (whitespace)
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new_value += whitespace[0];
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this.element.value = new_value + value;
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} else {
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this.element.value = value;
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}
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},
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updateChoices: function(choices) {
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if(!this.changed && this.has_focus) {
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this.update.innerHTML = choices;
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Element.cleanWhitespace(this.update);
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Element.cleanWhitespace(this.update.firstChild);
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if(this.update.firstChild && this.update.firstChild.childNodes) {
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this.entry_count =
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this.update.firstChild.childNodes.length;
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for (var i = 0; i < this.entry_count; i++) {
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entry = this.get_entry(i);
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entry.autocompleteIndex = i;
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this.addObservers(entry);
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}
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} else {
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this.entry_count = 0;
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}
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this.stopIndicator();
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this.index = 0;
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this.render();
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}
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},
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addObservers: function(element) {
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Event.observe(element, "mouseover", this.onHover.bindAsEventListener(this));
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Event.observe(element, "click", this.onClick.bindAsEventListener(this));
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},
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onObserverEvent: function() {
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this.changed = false;
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if(this.getEntry().length>=this.options.min_chars) {
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this.startIndicator();
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this.getUpdatedChoices();
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} else {
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this.active = false;
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this.hide();
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}
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},
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getEntry: function() {
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var token_pos = this.findLastToken();
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if (token_pos != -1)
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var ret = this.element.value.substr(token_pos + 1).replace(/^\s+/,'').replace(/\s+$/,'');
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else
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var ret = this.element.value;
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return /\n/.test(ret) ? '' : ret;
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},
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findLastToken: function() {
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var last_token_pos = -1;
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for (var i=0; i<this.options.tokens.length; i++) {
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var this_token_pos = this.element.value.lastIndexOf(this.options.tokens[i]);
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if (this_token_pos > last_token_pos)
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last_token_pos = this_token_pos;
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}
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return last_token_pos;
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}
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}
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Ajax.Autocompleter = Class.create();
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Ajax.Autocompleter.prototype = Object.extend(new Autocompleter.Base(),
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Object.extend(new Ajax.Base(), {
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initialize: function(element, update, url, options) {
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this.base_initialize(element, update, options);
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this.options.asynchronous = true;
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this.options.onComplete = this.onComplete.bind(this)
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this.options.method = 'post';
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this.options.defaultParams = this.options.parameters || null;
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this.url = url;
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},
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getUpdatedChoices: function() {
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entry = encodeURIComponent(this.element.name) + '=' +
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encodeURIComponent(this.getEntry());
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this.options.parameters = this.options.callback ?
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this.options.callback(this.element, entry) : entry;
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if(this.options.defaultParams)
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this.options.parameters += '&' + this.options.defaultParams;
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new Ajax.Request(this.url, this.options);
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},
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onComplete: function(request) {
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this.updateChoices(request.responseText);
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}
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}));
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// The local array autocompleter. Used when you'd prefer to
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// inject an array of autocompletion options into the page, rather
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// than sending out Ajax queries, which can be quite slow sometimes.
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//
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// The constructor takes four parameters. The first two are, as usual,
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// the id of the monitored textbox, and id of the autocompletion menu.
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// The third is the array you want to autocomplete from, and the fourth
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// is the options block.
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//
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// Extra local autocompletion options:
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// - choices - How many autocompletion choices to offer
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//
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// - partial_search - If false, the autocompleter will match entered
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// text only at the beginning of strings in the
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// autocomplete array. Defaults to true, which will
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// match text at the beginning of any *word* in the
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// strings in the autocomplete array. If you want to
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// search anywhere in the string, additionally set
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// the option full_search to true (default: off).
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//
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// - full_search - Search anywhere in autocomplete array strings.
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//
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// - partial_chars - How many characters to enter before triggering
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// a partial match (unlike min_chars, which defines
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// how many characters are required to do any match
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// at all). Defaults to 2.
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//
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// - ignore_case - Whether to ignore case when autocompleting.
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// Defaults to true.
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//
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// It's possible to pass in a custom function as the 'selector'
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// option, if you prefer to write your own autocompletion logic.
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// In that case, the other options above will not apply unless
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// you support them.
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Autocompleter.Local = Class.create();
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Autocompleter.Local.prototype = Object.extend(new Autocompleter.Base(), {
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initialize: function(element, update, array, options) {
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this.base_initialize(element, update, options);
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this.options.array = array;
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},
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getUpdatedChoices: function() {
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this.updateChoices(this.options.selector(this));
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},
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setOptions: function(options) {
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this.options = Object.extend({
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choices: 10,
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partial_search: true,
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partial_chars: 2,
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ignore_case: true,
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full_search: false,
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selector: function(instance) {
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var ret = new Array(); // Beginning matches
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var partial = new Array(); // Inside matches
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var entry = instance.getEntry();
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var count = 0;
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for (var i = 0; i < instance.options.array.length &&
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ret.length < instance.options.choices ; i++) {
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var elem = instance.options.array[i];
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var found_pos = instance.options.ignore_case ?
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elem.toLowerCase().indexOf(entry.toLowerCase()) :
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elem.indexOf(entry);
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while (found_pos != -1) {
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if (found_pos == 0 && elem.length != entry.length) {
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ret.push("<li><strong>" + elem.substr(0, entry.length) + "</strong>" +
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elem.substr(entry.length) + "</li>");
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break;
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} else if (entry.length >= instance.options.partial_chars &&
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instance.options.partial_search && found_pos != -1) {
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if (instance.options.full_search || /\s/.test(elem.substr(found_pos-1,1))) {
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partial.push("<li>" + elem.substr(0, found_pos) + "<strong>" +
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elem.substr(found_pos, entry.length) + "</strong>" + elem.substr(
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found_pos + entry.length) + "</li>");
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break;
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}
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}
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found_pos = instance.options.ignore_case ?
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elem.toLowerCase().indexOf(entry.toLowerCase(), found_pos + 1) :
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elem.indexOf(entry, found_pos + 1);
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}
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}
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if (partial.length)
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ret = ret.concat(partial.slice(0, instance.options.choices - ret.length))
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return "<ul>" + ret.join('') + "</ul>";
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}
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}, options || {});
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}
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});
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