javascript Tokeninput - JQ插件//模式
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/*
* jQuery Plugin: Tokenizing Autocomplete Text Entry
* Version 1.6.2
*
* Copyright (c) 2009 James Smith (http://loopj.com)
* Licensed jointly under the GPL and MIT licenses,
* choose which one suits your project best!
*
*/
;(function ($) {
var DEFAULT_SETTINGS = {
// Search settings
method: "GET",
queryParam: "q",
searchDelay: 300,
minChars: 1,
propertyToSearch: "name",
jsonContainer: null,
contentType: "json",
excludeCurrent: false,
excludeCurrentParameter: "x",
// Prepopulation settings
prePopulate: null,
processPrePopulate: false,
// Display settings
hintText: "Type in a search term",
noResultsText: "No results",
searchingText: "Searching...",
deleteText: "×",
animateDropdown: true,
placeholder: null,
theme: null,
zindex: 999,
resultsLimit: null,
enableHTML: false,
resultsFormatter: function(item) {
var string = item[this.propertyToSearch];
return "<li>" + (this.enableHTML ? string : _escapeHTML(string)) + "</li>";
},
tokenFormatter: function(item) {
var string = item[this.propertyToSearch];
return "<li><p>" + (this.enableHTML ? string : _escapeHTML(string)) + "</p></li>";
},
// Tokenization settings
tokenLimit: null,
tokenDelimiter: ",",
preventDuplicates: false,
tokenValue: "id",
// Behavioral settings
allowFreeTagging: false,
allowTabOut: false,
autoSelectFirstResult: false,
// Callbacks
onResult: null,
onCachedResult: null,
onAdd: null,
onFreeTaggingAdd: null,
onDelete: null,
onReady: null,
// Other settings
idPrefix: "token-input-",
// Keep track if the input is currently in disabled mode
disabled: false
};
// Default classes to use when theming
var DEFAULT_CLASSES = {
tokenList : "token-input-list",
token : "token-input-token",
tokenReadOnly : "token-input-token-readonly",
tokenDelete : "token-input-delete-token",
selectedToken : "token-input-selected-token",
highlightedToken : "token-input-highlighted-token",
dropdown : "token-input-dropdown",
dropdownItem : "token-input-dropdown-item",
dropdownItem2 : "token-input-dropdown-item2",
selectedDropdownItem : "token-input-selected-dropdown-item",
inputToken : "token-input-input-token",
focused : "token-input-focused",
disabled : "token-input-disabled"
};
// Input box position "enum"
var POSITION = {
BEFORE : 0,
AFTER : 1,
END : 2
};
// Keys "enum"
var KEY = {
BACKSPACE : 8,
TAB : 9,
ENTER : 13,
ESCAPE : 27,
SPACE : 32,
PAGE_UP : 33,
PAGE_DOWN : 34,
END : 35,
HOME : 36,
LEFT : 37,
UP : 38,
RIGHT : 39,
DOWN : 40,
NUMPAD_ENTER : 108,
COMMA : 188
};
var HTML_ESCAPES = {
'&' : '&',
'<' : '<',
'>' : '>',
'"' : '"',
"'" : ''',
'/' : '/'
};
var HTML_ESCAPE_CHARS = /[&<>"'\/]/g;
function coerceToString(val) {
return String((val === null || val === undefined) ? '' : val);
}
function _escapeHTML(text) {
return coerceToString(text).replace(HTML_ESCAPE_CHARS, function(match) {
return HTML_ESCAPES[match];
});
}
// Additional public (exposed) methods
var methods = {
init: function(url_or_data_or_function, options) {
var settings = $.extend({}, DEFAULT_SETTINGS, options || {});
return this.each(function () {
$(this).data("settings", settings);
$(this).data("tokenInputObject", new $.TokenList(this, url_or_data_or_function, settings));
});
},
clear: function() {
this.data("tokenInputObject").clear();
return this;
},
add: function(item) {
this.data("tokenInputObject").add(item);
return this;
},
remove: function(item) {
this.data("tokenInputObject").remove(item);
return this;
},
get: function() {
return this.data("tokenInputObject").getTokens();
},
toggleDisabled: function(disable) {
this.data("tokenInputObject").toggleDisabled(disable);
return this;
},
setOptions: function(options){
$(this).data("settings", $.extend({}, $(this).data("settings"), options || {}));
return this;
},
destroy: function () {
if (this.data("tokenInputObject")) {
this.data("tokenInputObject").clear();
var tmpInput = this;
var closest = this.parent();
closest.empty();
tmpInput.show();
closest.append(tmpInput);
return tmpInput;
}
}
};
// Expose the .tokenInput function to jQuery as a plugin
$.fn.tokenInput = function (method) {
// Method calling and initialization logic
if (methods[method]) {
return methods[method].apply(this, Array.prototype.slice.call(arguments, 1));
} else {
return methods.init.apply(this, arguments);
}
};
// TokenList class for each input
$.TokenList = function (input, url_or_data, settings) {
//
// Initialization
//
// Configure the data source
if (typeof(url_or_data) === "string" || typeof(url_or_data) === "function") {
// Set the url to query against
$(input).data("settings").url = url_or_data;
// If the URL is a function, evaluate it here to do our initalization work
var url = computeURL();
// Make a smart guess about cross-domain if it wasn't explicitly specified
if ($(input).data("settings").crossDomain === undefined && typeof url === "string") {
if(url.indexOf("://") === -1) {
$(input).data("settings").crossDomain = false;
} else {
$(input).data("settings").crossDomain = (location.href.split(/\/+/g)[1] !== url.split(/\/+/g)[1]);
}
}
} else if (typeof(url_or_data) === "object") {
// Set the local data to search through
$(input).data("settings").local_data = url_or_data;
}
// Build class names
if($(input).data("settings").classes) {
// Use custom class names
$(input).data("settings").classes = $.extend({}, DEFAULT_CLASSES, $(input).data("settings").classes);
} else if($(input).data("settings").theme) {
// Use theme-suffixed default class names
$(input).data("settings").classes = {};
$.each(DEFAULT_CLASSES, function(key, value) {
$(input).data("settings").classes[key] = value + "-" + $(input).data("settings").theme;
});
} else {
$(input).data("settings").classes = DEFAULT_CLASSES;
}
// Save the tokens
var saved_tokens = [];
// Keep track of the number of tokens in the list
var token_count = 0;
// Basic cache to save on db hits
var cache = new $.TokenList.Cache();
// Keep track of the timeout, old vals
var timeout;
var input_val;
// Create a new text input an attach keyup events
var input_box = $("<input type=\"text\" autocomplete=\"off\" autocapitalize=\"off\"/>")
.css({
outline: "none"
})
.attr("id", $(input).data("settings").idPrefix + input.id)
.focus(function () {
if ($(input).data("settings").disabled) {
return false;
} else
if ($(input).data("settings").tokenLimit === null || $(input).data("settings").tokenLimit !== token_count) {
show_dropdown_hint();
}
token_list.addClass($(input).data("settings").classes.focused);
})
.blur(function () {
hide_dropdown();
if ($(input).data("settings").allowFreeTagging) {
add_freetagging_tokens();
}
$(this).val("");
token_list.removeClass($(input).data("settings").classes.focused);
})
.bind("keyup keydown blur update", resize_input)
.keydown(function (event) {
var previous_token;
var next_token;
switch(event.keyCode) {
case KEY.LEFT:
case KEY.RIGHT:
case KEY.UP:
case KEY.DOWN:
if(this.value.length === 0) {
previous_token = input_token.prev();
next_token = input_token.next();
if((previous_token.length && previous_token.get(0) === selected_token) ||
(next_token.length && next_token.get(0) === selected_token)) {
// Check if there is a previous/next token and it is selected
if(event.keyCode === KEY.LEFT || event.keyCode === KEY.UP) {
deselect_token($(selected_token), POSITION.BEFORE);
} else {
deselect_token($(selected_token), POSITION.AFTER);
}
} else if((event.keyCode === KEY.LEFT || event.keyCode === KEY.UP) && previous_token.length) {
// We are moving left, select the previous token if it exists
select_token($(previous_token.get(0)));
} else if((event.keyCode === KEY.RIGHT || event.keyCode === KEY.DOWN) && next_token.length) {
// We are moving right, select the next token if it exists
select_token($(next_token.get(0)));
}
} else {
var dropdown_item = null;
if (event.keyCode === KEY.DOWN || event.keyCode === KEY.RIGHT) {
dropdown_item = $(dropdown).find('li').first();
if (selected_dropdown_item) {
dropdown_item = $(selected_dropdown_item).next();
}
} else {
dropdown_item = $(dropdown).find('li').last();
if (selected_dropdown_item) {
dropdown_item = $(selected_dropdown_item).prev();
}
}
select_dropdown_item(dropdown_item);
}
break;
case KEY.BACKSPACE:
previous_token = input_token.prev();
if (this.value.length === 0) {
if (selected_token) {
delete_token($(selected_token));
hiddenInput.change();
} else if(previous_token.length) {
select_token($(previous_token.get(0)));
}
return false;
} else if($(this).val().length === 1) {
hide_dropdown();
} else {
// set a timeout just long enough to let this function finish.
setTimeout(function(){ do_search(); }, 5);
}
break;
case KEY.TAB:
case KEY.ENTER:
case KEY.NUMPAD_ENTER:
case KEY.COMMA:
if(selected_dropdown_item) {
add_token($(selected_dropdown_item).data("tokeninput"));
hiddenInput.change();
} else {
if ($(input).data("settings").allowFreeTagging) {
if($(input).data("settings").allowTabOut && $(this).val() === "") {
return true;
} else {
add_freetagging_tokens();
}
} else {
$(this).val("");
if($(input).data("settings").allowTabOut) {
return true;
}
}
event.stopPropagation();
event.preventDefault();
}
return false;
case KEY.ESCAPE:
hide_dropdown();
return true;
default:
if (String.fromCharCode(event.which)) {
// set a timeout just long enough to let this function finish.
setTimeout(function(){ do_search(); }, 5);
}
break;
}
});
// Keep reference for placeholder
if (settings.placeholder) {
input_box.attr("placeholder", settings.placeholder);
}
// Keep a reference to the original input box
var hiddenInput = $(input)
.hide()
.val("")
.focus(function () {
focusWithTimeout(input_box);
})
.blur(function () {
input_box.blur();
//return the object to this can be referenced in the callback functions.
return hiddenInput;
})
;
// Keep a reference to the selected token and dropdown item
var selected_token = null;
var selected_token_index = 0;
var selected_dropdown_item = null;
// The list to store the token items in
var token_list = $("<ul />")
.addClass($(input).data("settings").classes.tokenList)
.click(function (event) {
var li = $(event.target).closest("li");
if(li && li.get(0) && $.data(li.get(0), "tokeninput")) {
toggle_select_token(li);
} else {
// Deselect selected token
if(selected_token) {
deselect_token($(selected_token), POSITION.END);
}
// Focus input box
focusWithTimeout(input_box);
}
})
.mouseover(function (event) {
var li = $(event.target).closest("li");
if(li && selected_token !== this) {
li.addClass($(input).data("settings").classes.highlightedToken);
}
})
.mouseout(function (event) {
var li = $(event.target).closest("li");
if(li && selected_token !== this) {
li.removeClass($(input).data("settings").classes.highlightedToken);
}
})
.insertBefore(hiddenInput);
// The token holding the input box
var input_token = $("<li />")
.addClass($(input).data("settings").classes.inputToken)
.appendTo(token_list)
.append(input_box);
// The list to store the dropdown items in
var dropdown = $("<div/>")
.addClass($(input).data("settings").classes.dropdown)
.appendTo("body")
.hide();
// Magic element to help us resize the text input
var input_resizer = $("<tester/>")
.insertAfter(input_box)
.css({
position: "absolute",
top: -9999,
left: -9999,
width: "auto",
fontSize: input_box.css("fontSize"),
fontFamily: input_box.css("fontFamily"),
fontWeight: input_box.css("fontWeight"),
letterSpacing: input_box.css("letterSpacing"),
whiteSpace: "nowrap"
});
// Pre-populate list if items exist
hiddenInput.val("");
var li_data = $(input).data("settings").prePopulate || hiddenInput.data("pre");
if ($(input).data("settings").processPrePopulate && $.isFunction($(input).data("settings").onResult)) {
li_data = $(input).data("settings").onResult.call(hiddenInput, li_data);
}
if (li_data && li_data.length) {
$.each(li_data, function (index, value) {
insert_token(value);
checkTokenLimit();
input_box.attr("placeholder", null)
});
}
// Check if widget should initialize as disabled
if ($(input).data("settings").disabled) {
toggleDisabled(true);
}
// Initialization is done
if (typeof($(input).data("settings").onReady) === "function") {
$(input).data("settings").onReady.call();
}
//
// Public functions
//
this.clear = function() {
token_list.children("li").each(function() {
if ($(this).children("input").length === 0) {
delete_token($(this));
}
});
};
this.add = function(item) {
add_token(item);
};
this.remove = function(item) {
token_list.children("li").each(function() {
if ($(this).children("input").length === 0) {
var currToken = $(this).data("tokeninput");
var match = true;
for (var prop in item) {
if (item[prop] !== currToken[prop]) {
match = false;
break;
}
}
if (match) {
delete_token($(this));
}
}
});
};
this.getTokens = function() {
return saved_tokens;
};
this.toggleDisabled = function(disable) {
toggleDisabled(disable);
};
// Resize input to maximum width so the placeholder can be seen
resize_input();
//
// Private functions
//
function escapeHTML(text) {
return $(input).data("settings").enableHTML ? text : _escapeHTML(text);
}
// Toggles the widget between enabled and disabled state, or according
// to the [disable] parameter.
function toggleDisabled(disable) {
if (typeof disable === 'boolean') {
$(input).data("settings").disabled = disable
} else {
$(input).data("settings").disabled = !$(input).data("settings").disabled;
}
input_box.attr('disabled', $(input).data("settings").disabled);
token_list.toggleClass($(input).data("settings").classes.disabled, $(input).data("settings").disabled);
// if there is any token selected we deselect it
if(selected_token) {
deselect_token($(selected_token), POSITION.END);
}
hiddenInput.attr('disabled', $(input).data("settings").disabled);
}
function checkTokenLimit() {
if($(input).data("settings").tokenLimit !== null && token_count >= $(input).data("settings").tokenLimit) {
input_box.hide();
hide_dropdown();
return;
}
}
function resize_input() {
if(input_val === (input_val = input_box.val())) {return;}
// Get width left on the current line
var width_left = token_list.width() - input_box.offset().left - token_list.offset().left;
// Enter new content into resizer and resize input accordingly
input_resizer.html(_escapeHTML(input_val) || _escapeHTML(settings.placeholder));
// Get maximum width, minimum the size of input and maximum the widget's width
input_box.width(Math.min(token_list.width(),
Math.max(width_left, input_resizer.width() + 30)));
}
function add_freetagging_tokens() {
var value = $.trim(input_box.val());
var tokens = value.split($(input).data("settings").tokenDelimiter);
$.each(tokens, function(i, token) {
if (!token) {
return;
}
if ($.isFunction($(input).data("settings").onFreeTaggingAdd)) {
token = $(input).data("settings").onFreeTaggingAdd.call(hiddenInput, token);
}
var object = {};
object[$(input).data("settings").tokenValue] = object[$(input).data("settings").propertyToSearch] = token;
add_token(object);
});
}
// Inner function to a token to the list
function insert_token(item) {
var $this_token = $($(input).data("settings").tokenFormatter(item));
var readonly = item.readonly === true;
if(readonly) $this_token.addClass($(input).data("settings").classes.tokenReadOnly);
$this_token.addClass($(input).data("settings").classes.token).insertBefore(input_token);
// The 'delete token' button
if(!readonly) {
$("<span>" + $(input).data("settings").deleteText + "</span>")
.addClass($(input).data("settings").classes.tokenDelete)
.appendTo($this_token)
.click(function () {
if (!$(input).data("settings").disabled) {
delete_token($(this).parent());
hiddenInput.change();
return false;
}
});
}
// Store data on the token
var token_data = item;
$.data($this_token.get(0), "tokeninput", item);
// Save this token for duplicate checking
saved_tokens = saved_tokens.slice(0,selected_token_index).concat([token_data]).concat(saved_tokens.slice(selected_token_index));
selected_token_index++;
// Update the hidden input
update_hiddenInput(saved_tokens, hiddenInput);
token_count += 1;
// Check the token limit
if($(input).data("settings").tokenLimit !== null && token_count >= $(input).data("settings").tokenLimit) {
input_box.hide();
hide_dropdown();
}
return $this_token;
}
// Add a token to the token list based on user input
function add_token (item) {
var callback = $(input).data("settings").onAdd;
// See if the token already exists and select it if we don't want duplicates
if(token_count > 0 && $(input).data("settings").preventDuplicates) {
var found_existing_token = null;
token_list.children().each(function () {
var existing_token = $(this);
var existing_data = $.data(existing_token.get(0), "tokeninput");
if(existing_data && existing_data[settings.tokenValue] === item[settings.tokenValue]) {
found_existing_token = existing_token;
return false;
}
});
if(found_existing_token) {
select_token(found_existing_token);
input_token.insertAfter(found_existing_token);
focusWithTimeout(input_box);
return;
}
}
// Squeeze input_box so we force no unnecessary line break
input_box.width(1);
// Insert the new tokens
if($(input).data("settings").tokenLimit == null || token_count < $(input).data("settings").tokenLimit) {
insert_token(item);
// Remove the placeholder so it's not seen after you've added a token
input_box.attr("placeholder", null);
checkTokenLimit();
}
// Clear input box
input_box.val("");
// Don't show the help dropdown, they've got the idea
hide_dropdown();
// Execute the onAdd callback if defined
if($.isFunction(callback)) {
callback.call(hiddenInput,item);
}
}
// Select a token in the token list
function select_token (token) {
if (!$(input).data("settings").disabled) {
token.addClass($(input).data("settings").classes.selectedToken);
selected_token = token.get(0);
// Hide input box
input_box.val("");
// Hide dropdown if it is visible (eg if we clicked to select token)
hide_dropdown();
}
}
// Deselect a token in the token list
function deselect_token (token, position) {
token.removeClass($(input).data("settings").classes.selectedToken);
selected_token = null;
if(position === POSITION.BEFORE) {
input_token.insertBefore(token);
selected_token_index--;
} else if(position === POSITION.AFTER) {
input_token.insertAfter(token);
selected_token_index++;
} else {
input_token.appendTo(token_list);
selected_token_index = token_count;
}
// Show the input box and give it focus again
focusWithTimeout(input_box);
}
// Toggle selection of a token in the token list
function toggle_select_token(token) {
var previous_selected_token = selected_token;
if(selected_token) {
deselect_token($(selected_token), POSITION.END);
}
if(previous_selected_token === token.get(0)) {
deselect_token(token, POSITION.END);
} else {
select_token(token);
}
}
// Delete a token from the token list
function delete_token (token) {
// Remove the id from the saved list
var token_data = $.data(token.get(0), "tokeninput");
var callback = $(input).data("settings").onDelete;
var index = token.prevAll().length;
if(index > selected_token_index) index--;
// Delete the token
token.remove();
selected_token = null;
// Show the input box and give it focus again
focusWithTimeout(input_box);
// Remove this token from the saved list
saved_tokens = saved_tokens.slice(0,index).concat(saved_tokens.slice(index+1));
if (saved_tokens.length == 0) {
input_box.attr("placeholder", settings.placeholder)
}
if(index < selected_token_index) selected_token_index--;
// Update the hidden input
update_hiddenInput(saved_tokens, hiddenInput);
token_count -= 1;
if($(input).data("settings").tokenLimit !== null) {
input_box
.show()
.val("");
focusWithTimeout(input_box);
}
// Execute the onDelete callback if defined
if($.isFunction(callback)) {
callback.call(hiddenInput,token_data);
}
}
// Update the hidden input box value
function update_hiddenInput(saved_tokens, hiddenInput) {
var token_values = $.map(saved_tokens, function (el) {
if(typeof $(input).data("settings").tokenValue == 'function')
return $(input).data("settings").tokenValue.call(this, el);
return el[$(input).data("settings").tokenValue];
});
hiddenInput.val(token_values.join($(input).data("settings").tokenDelimiter));
}
// Hide and clear the results dropdown
function hide_dropdown () {
dropdown.hide().empty();
selected_dropdown_item = null;
}
function show_dropdown() {
dropdown
.css({
position: "absolute",
top: token_list.offset().top + token_list.outerHeight(true),
left: token_list.offset().left,
width: token_list.width(),
'z-index': $(input).data("settings").zindex
})
.show();
}
function show_dropdown_searching () {
if($(input).data("settings").searchingText) {
dropdown.html("<p>" + escapeHTML($(input).data("settings").searchingText) + "</p>");
show_dropdown();
}
}
function show_dropdown_hint () {
if($(input).data("settings").hintText) {
dropdown.html("<p>" + escapeHTML($(input).data("settings").hintText) + "</p>");
show_dropdown();
}
}
var regexp_special_chars = new RegExp('[.\\\\+*?\\[\\^\\]$(){}=!<>|:\\-]', 'g');
function regexp_escape(term) {
return term.replace(regexp_special_chars, '\\$&');
}
// Highlight the query part of the search term
function highlight_term(value, term) {
return value.replace(
new RegExp(
"(?![^&;]+;)(?!<[^<>]*)(" + regexp_escape(term) + ")(?![^<>]*>)(?![^&;]+;)",
"gi"
), function(match, p1) {
return "<b>" + escapeHTML(p1) + "</b>";
}
);
}
function find_value_and_highlight_term(template, value, term) {
return template.replace(new RegExp("(?![^&;]+;)(?!<[^<>]*)(" + regexp_escape(value) + ")(?![^<>]*>)(?![^&;]+;)", "g"), highlight_term(value, term));
}
// exclude existing tokens from dropdown, so the list is clearer
function excludeCurrent(results) {
if ($(input).data("settings").excludeCurrent) {
var currentTokens = $(input).data("tokenInputObject").getTokens(),
trimmedList = [];
if (currentTokens.length) {
$.each(results, function(index, value) {
var notFound = true;
$.each(currentTokens, function(cIndex, cValue) {
if (value[$(input).data("settings").propertyToSearch] == cValue[$(input).data("settings").propertyToSearch]) {
notFound = false;
return false;
}
});
if (notFound) {
trimmedList.push(value);
}
});
results = trimmedList;
}
}
return results;
}
// Populate the results dropdown with some results
function populateDropdown (query, results) {
// exclude current tokens if configured
results = excludeCurrent(results);
if(results && results.length) {
dropdown.empty();
var dropdown_ul = $("<ul/>")
.appendTo(dropdown)
.mouseover(function (event) {
select_dropdown_item($(event.target).closest("li"));
})
.mousedown(function (event) {
add_token($(event.target).closest("li").data("tokeninput"));
hiddenInput.change();
return false;
})
.hide();
if ($(input).data("settings").resultsLimit && results.length > $(input).data("settings").resultsLimit) {
results = results.slice(0, $(input).data("settings").resultsLimit);
}
$.each(results, function(index, value) {
var this_li = $(input).data("settings").resultsFormatter(value);
this_li = find_value_and_highlight_term(this_li ,value[$(input).data("settings").propertyToSearch], query);
this_li = $(this_li).appendTo(dropdown_ul);
if(index % 2) {
this_li.addClass($(input).data("settings").classes.dropdownItem);
} else {
this_li.addClass($(input).data("settings").classes.dropdownItem2);
}
if(index === 0 && $(input).data("settings").autoSelectFirstResult) {
select_dropdown_item(this_li);
}
$.data(this_li.get(0), "tokeninput", value);
});
show_dropdown();
if($(input).data("settings").animateDropdown) {
dropdown_ul.slideDown("fast");
} else {
dropdown_ul.show();
}
} else {
if($(input).data("settings").noResultsText) {
dropdown.html("<p>" + escapeHTML($(input).data("settings").noResultsText) + "</p>");
show_dropdown();
}
}
}
// Highlight an item in the results dropdown
function select_dropdown_item (item) {
if(item) {
if(selected_dropdown_item) {
deselect_dropdown_item($(selected_dropdown_item));
}
item.addClass($(input).data("settings").classes.selectedDropdownItem);
selected_dropdown_item = item.get(0);
}
}
// Remove highlighting from an item in the results dropdown
function deselect_dropdown_item (item) {
item.removeClass($(input).data("settings").classes.selectedDropdownItem);
selected_dropdown_item = null;
}
// Do a search and show the "searching" dropdown if the input is longer
// than $(input).data("settings").minChars
function do_search() {
var query = input_box.val();
if(query && query.length) {
if(selected_token) {
deselect_token($(selected_token), POSITION.AFTER);
}
if(query.length >= $(input).data("settings").minChars) {
show_dropdown_searching();
clearTimeout(timeout);
timeout = setTimeout(function(){
run_search(query);
}, $(input).data("settings").searchDelay);
} else {
hide_dropdown();
}
}
}
// Do the actual search
function run_search(query) {
var cache_key = query + computeURL();
var cached_results = cache.get(cache_key);
if (cached_results) {
if ($.isFunction($(input).data("settings").onCachedResult)) {
cached_results = $(input).data("settings").onCachedResult.call(hiddenInput, cached_results);
}
populateDropdown(query, cached_results);
} else {
// Are we doing an ajax search or local data search?
if($(input).data("settings").url) {
var url = computeURL();
// Extract existing get params
var ajax_params = {};
ajax_params.data = {};
if(url.indexOf("?") > -1) {
var parts = url.split("?");
ajax_params.url = parts[0];
var param_array = parts[1].split("&");
$.each(param_array, function (index, value) {
var kv = value.split("=");
ajax_params.data[kv[0]] = kv[1];
});
} else {
ajax_params.url = url;
}
// Prepare the request
ajax_params.data[$(input).data("settings").queryParam] = query;
ajax_params.type = $(input).data("settings").method;
ajax_params.dataType = $(input).data("settings").contentType;
if ($(input).data("settings").crossDomain) {
ajax_params.dataType = "jsonp";
}
// exclude current tokens?
// send exclude list to the server, so it can also exclude existing tokens
if ($(input).data("settings").excludeCurrent) {
var currentTokens = $(input).data("tokenInputObject").getTokens();
var tokenList = $.map(currentTokens, function (el) {
if(typeof $(input).data("settings").tokenValue == 'function')
return $(input).data("settings").tokenValue.call(this, el);
return el[$(input).data("settings").tokenValue];
});
ajax_params.data[$(input).data("settings").excludeCurrentParameter] = tokenList.join($(input).data("settings").tokenDelimiter);
}
// Attach the success callback
ajax_params.success = function(results) {
cache.add(cache_key, $(input).data("settings").jsonContainer ? results[$(input).data("settings").jsonContainer] : results);
if($.isFunction($(input).data("settings").onResult)) {
results = $(input).data("settings").onResult.call(hiddenInput, results);
}
// only populate the dropdown if the results are associated with the active search query
if(input_box.val() === query) {
populateDropdown(query, $(input).data("settings").jsonContainer ? results[$(input).data("settings").jsonContainer] : results);
}
};
// Provide a beforeSend callback
if (settings.onSend) {
settings.onSend(ajax_params);
}
// Make the request
$.ajax(ajax_params);
} else if($(input).data("settings").local_data) {
// Do the search through local data
var results = $.grep($(input).data("settings").local_data, function (row) {
return row[$(input).data("settings").propertyToSearch].toLowerCase().indexOf(query.toLowerCase()) > -1;
});
cache.add(cache_key, results);
if($.isFunction($(input).data("settings").onResult)) {
results = $(input).data("settings").onResult.call(hiddenInput, results);
}
populateDropdown(query, results);
}
}
}
// compute the dynamic URL
function computeURL() {
var settings = $(input).data("settings");
return typeof settings.url == 'function' ? settings.url.call(settings) : settings.url;
}
// Bring browser focus to the specified object.
// Use of setTimeout is to get around an IE bug.
// (See, e.g., http://stackoverflow.com/questions/2600186/focus-doesnt-work-in-ie)
//
// obj: a jQuery object to focus()
function focusWithTimeout(object) {
setTimeout(
function() {
object.focus();
},
50
);
}
};
// Really basic cache for the results
$.TokenList.Cache = function (options) {
var settings, data = {}, size = 0, flush;
settings = $.extend({ max_size: 500 }, options);
flush = function () {
data = {};
size = 0;
};
this.add = function (query, results) {
if (size > settings.max_size) {
flush();
}
if (!data[query]) {
size += 1;
}
data[query] = results;
};
this.get = function (query) {
return data[query];
};
};
}(jQuery));以上是关于javascript Tokeninput - JQ插件//模式的主要内容，如果未能解决你的问题，请参考以下文章
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