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'use strict';
/**
* @workInProgress
* @ngdoc overview
* @name angular.widget
* @description
*
* An angular widget can be either a custom attribute that modifies an existing DOM element or an
* entirely new DOM element.
*
* During html compilation, widgets are processed after {@link angular.markup markup}, but before
* {@link angular.directive directives}.
*
* Following is the list of built-in angular widgets:
*
* * {@link angular.widget.@ng:format ng:format} - Formats data for display to user and for storage.
* * {@link angular.widget.@ng:non-bindable ng:non-bindable} - Blocks angular from processing an
* HTML element.
* * {@link angular.widget.@ng:repeat ng:repeat} - Creates and manages a collection of cloned HTML
* elements.
* * {@link angular.widget.@ng:required ng:required} - Verifies presence of user input.
* * {@link angular.widget.@ng:validate ng:validate} - Validates content of user input.
* * {@link angular.widget.HTML HTML input elements} - Standard HTML input elements data-bound by
* angular.
* * {@link angular.widget.ng:view ng:view} - Works with $route to "include" partial templates
* * {@link angular.widget.ng:switch ng:switch} - Conditionally changes DOM structure
* * {@link angular.widget.ng:include ng:include} - Includes an external HTML fragment
*
* For more information about angular widgets, see {@link guide/dev_guide.compiler.widgets
* Understanding Angular Widgets} in the angular Developer Guide.
*/
/**
* @workInProgress
* @ngdoc widget
* @name angular.widget.HTML
*
* @description
* The most common widgets you will use will be in the form of the
* standard HTML set. These widgets are bound using the `name` attribute
* to an expression. In addition, they can have `ng:validate`, `ng:required`,
* `ng:format`, `ng:change` attribute to further control their behavior.
*
* @usageContent
* see example below for usage
*
* <input type="text|checkbox|..." ... />
* <textarea ... />
* <select ...>
* <option>...</option>
* </select>
*
* @example
<doc:example>
<doc:source>
<table style="font-size:.9em;">
<tr>
<th>Name</th>
<th>Format</th>
<th>HTML</th>
<th>UI</th>
<th ng:non-bindable>{{input#}}</th>
</tr>
<tr>
<th>text</th>
<td>String</td>
<td><tt><input type="text" name="input1"></tt></td>
<td><input type="text" name="input1" size="4"></td>
<td><tt>{{input1|json}}</tt></td>
</tr>
<tr>
<th>textarea</th>
<td>String</td>
<td><tt><textarea name="input2"></textarea></tt></td>
<td><textarea name="input2" cols='6'></textarea></td>
<td><tt>{{input2|json}}</tt></td>
</tr>
<tr>
<th>radio</th>
<td>String</td>
<td><tt>
<input type="radio" name="input3" value="A"><br>
<input type="radio" name="input3" value="B">
</tt></td>
<td>
<input type="radio" name="input3" value="A">
<input type="radio" name="input3" value="B">
</td>
<td><tt>{{input3|json}}</tt></td>
</tr>
<tr>
<th>checkbox</th>
<td>Boolean</td>
<td><tt><input type="checkbox" name="input4" value="checked"></tt></td>
<td><input type="checkbox" name="input4" value="checked"></td>
<td><tt>{{input4|json}}</tt></td>
</tr>
<tr>
<th>pulldown</th>
<td>String</td>
<td><tt>
<select name="input5"><br>
<option value="c">C</option><br>
<option value="d">D</option><br>
</select><br>
</tt></td>
<td>
<select name="input5">
<option value="c">C</option>
<option value="d">D</option>
</select>
</td>
<td><tt>{{input5|json}}</tt></td>
</tr>
<tr>
<th>multiselect</th>
<td>Array</td>
<td><tt>
<select name="input6" multiple size="4"><br>
<option value="e">E</option><br>
<option value="f">F</option><br>
</select><br>
</tt></td>
<td>
<select name="input6" multiple size="4">
<option value="e">E</option>
<option value="f">F</option>
</select>
</td>
<td><tt>{{input6|json}}</tt></td>
</tr>
</table>
</doc:source>
<doc:scenario>
it('should exercise text', function(){
input('input1').enter('Carlos');
expect(binding('input1')).toEqual('"Carlos"');
});
it('should exercise textarea', function(){
input('input2').enter('Carlos');
expect(binding('input2')).toEqual('"Carlos"');
});
it('should exercise radio', function(){
expect(binding('input3')).toEqual('null');
input('input3').select('A');
expect(binding('input3')).toEqual('"A"');
input('input3').select('B');
expect(binding('input3')).toEqual('"B"');
});
it('should exercise checkbox', function(){
expect(binding('input4')).toEqual('false');
input('input4').check();
expect(binding('input4')).toEqual('true');
});
it('should exercise pulldown', function(){
expect(binding('input5')).toEqual('"c"');
select('input5').option('d');
expect(binding('input5')).toEqual('"d"');
});
it('should exercise multiselect', function(){
expect(binding('input6')).toEqual('[]');
select('input6').options('e');
expect(binding('input6')).toEqual('["e"]');
select('input6').options('e', 'f');
expect(binding('input6')).toEqual('["e","f"]');
});
</doc:scenario>
</doc:example>
*/
function modelAccessor(scope, element) {
var expr = element.attr('name');
var exprFn, assignFn;
if (expr) {
exprFn = parser(expr).assignable();
assignFn = exprFn.assign;
if (!assignFn) throw new Error("Expression '" + expr + "' is not assignable.");
return {
get: function() {
return exprFn(scope);
},
set: function(value) {
if (value !== undefined) {
return scope.$tryEval(function(){
assignFn(scope, value);
}, element);
}
}
};
}
}
function modelFormattedAccessor(scope, element) {
var accessor = modelAccessor(scope, element),
formatterName = element.attr('ng:format') || NOOP,
formatter = compileFormatter(formatterName);
if (accessor) {
return {
get: function() {
return formatter.format(scope, accessor.get());
},
set: function(value) {
return accessor.set(formatter.parse(scope, value));
}
};
}
}
function compileValidator(expr) {
return parser(expr).validator()();
}
function compileFormatter(expr) {
return parser(expr).formatter()();
}
/**
* @workInProgress
* @ngdoc widget
* @name angular.widget.@ng:validate
*
* @description
* The `ng:validate` attribute widget validates the user input. If the input does not pass
* validation, the `ng-validation-error` CSS class and the `ng:error` attribute are set on the input
* element. Check out {@link angular.validator validators} to find out more.
*
* @param {string} validator The name of a built-in or custom {@link angular.validator validator} to
* to be used.
*
* @element INPUT
* @css ng-validation-error
*
* @example
* This example shows how the input element becomes red when it contains invalid input. Correct
* the input to make the error disappear.
*
<doc:example>
<doc:source>
I don't validate:
<input type="text" name="value" value="NotANumber"><br/>
I need an integer or nothing:
<input type="text" name="value" ng:validate="integer"><br/>
</doc:source>
<doc:scenario>
it('should check ng:validate', function(){
expect(element('.doc-example-live :input:last').attr('className')).
toMatch(/ng-validation-error/);
input('value').enter('123');
expect(element('.doc-example-live :input:last').attr('className')).
not().toMatch(/ng-validation-error/);
});
</doc:scenario>
</doc:example>
*/
/**
* @workInProgress
* @ngdoc widget
* @name angular.widget.@ng:required
*
* @description
* The `ng:required` attribute widget validates that the user input is present. It is a special case
* of the {@link angular.widget.@ng:validate ng:validate} attribute widget.
*
* @element INPUT
* @css ng-validation-error
*
* @example
* This example shows how the input element becomes red when it contains invalid input. Correct
* the input to make the error disappear.
*
<doc:example>
<doc:source>
I cannot be blank: <input type="text" name="value" ng:required><br/>
</doc:source>
<doc:scenario>
it('should check ng:required', function(){
expect(element('.doc-example-live :input').attr('className')).toMatch(/ng-validation-error/);
input('value').enter('123');
expect(element('.doc-example-live :input').attr('className')).not().toMatch(/ng-validation-error/);
});
</doc:scenario>
</doc:example>
*/
/**
* @workInProgress
* @ngdoc widget
* @name angular.widget.@ng:format
*
* @description
* The `ng:format` attribute widget formats stored data to user-readable text and parses the text
* back to the stored form. You might find this useful, for example, if you collect user input in a
* text field but need to store the data in the model as a list. Check out
* {@link angular.formatter formatters} to learn more.
*
* @param {string} formatter The name of the built-in or custom {@link angular.formatter formatter}
* to be used.
*
* @element INPUT
*
* @example
* This example shows how the user input is converted from a string and internally represented as an
* array.
*
<doc:example>
<doc:source>
Enter a comma separated list of items:
<input type="text" name="list" ng:format="list" value="table, chairs, plate">
<pre>list={{list}}</pre>
</doc:source>
<doc:scenario>
it('should check ng:format', function(){
expect(binding('list')).toBe('list=["table","chairs","plate"]');
input('list').enter(',,, a ,,,');
expect(binding('list')).toBe('list=["a"]');
});
</doc:scenario>
</doc:example>
*/
function valueAccessor(scope, element) {
var validatorName = element.attr('ng:validate') || NOOP,
validator = compileValidator(validatorName),
requiredExpr = element.attr('ng:required'),
formatterName = element.attr('ng:format') || NOOP,
formatter = compileFormatter(formatterName),
format, parse, lastError, required,
invalidWidgets = scope.$service('$invalidWidgets') || {markValid:noop, markInvalid:noop};
if (!validator) throw "Validator named '" + validatorName + "' not found.";
format = formatter.format;
parse = formatter.parse;
if (requiredExpr) {
scope.$watch(requiredExpr, function(newValue) {
required = newValue;
validate();
});
} else {
required = requiredExpr === '';
}
element.data($$validate, validate);
return {
get: function(){
if (lastError)
elementError(element, NG_VALIDATION_ERROR, null);
try {
var value = parse(scope, element.val());
validate();
return value;
} catch (e) {
lastError = e;
elementError(element, NG_VALIDATION_ERROR, e);
}
},
set: function(value) {
var oldValue = element.val(),
newValue = format(scope, value);
if (oldValue != newValue) {
element.val(newValue || ''); // needed for ie
}
validate();
}
};
function validate() {
var value = trim(element.val());
if (element[0].disabled || element[0].readOnly) {
elementError(element, NG_VALIDATION_ERROR, null);
invalidWidgets.markValid(element);
} else {
var error, validateScope = inherit(scope, {$element:element});
error = required && !value
? 'Required'
: (value ? validator(validateScope, value) : null);
elementError(element, NG_VALIDATION_ERROR, error);
lastError = error;
if (error) {
invalidWidgets.markInvalid(element);
} else {
invalidWidgets.markValid(element);
}
}
}
}
function checkedAccessor(scope, element) {
var domElement = element[0], elementValue = domElement.value;
return {
get: function(){
return !!domElement.checked;
},
set: function(value){
domElement.checked = toBoolean(value);
}
};
}
function radioAccessor(scope, element) {
var domElement = element[0];
return {
get: function(){
return domElement.checked ? domElement.value : null;
},
set: function(value){
domElement.checked = value == domElement.value;
}
};
}
function optionsAccessor(scope, element) {
var formatterName = element.attr('ng:format') || NOOP,
formatter = compileFormatter(formatterName);
return {
get: function(){
var values = [];
forEach(element[0].options, function(option){
if (option.selected) values.push(formatter.parse(scope, option.value));
});
return values;
},
set: function(values){
var keys = {};
forEach(values, function(value){
keys[formatter.format(scope, value)] = true;
});
forEach(element[0].options, function(option){
option.selected = keys[option.value];
});
}
};
}
function noopAccessor() { return { get: noop, set: noop }; }
/*
* TODO: refactor
*
* The table below is not quite right. In some cases the formatter is on the model side
* and in some cases it is on the view side. This is a historical artifact
*
* The concept of model/view accessor is useful for anyone who is trying to develop UI, and
* so it should be exposed to others. There should be a form object which keeps track of the
* accessors and also acts as their factory. It should expose it as an object and allow
* the validator to publish errors to it, so that the the error messages can be bound to it.
*
*/
var textWidget = inputWidget('keydown change', modelAccessor, valueAccessor, initWidgetValue(), true),
INPUT_TYPE = {
'text': textWidget,
'textarea': textWidget,
'hidden': textWidget,
'password': textWidget,
'checkbox': inputWidget('click', modelFormattedAccessor, checkedAccessor, initWidgetValue(false)),
'radio': inputWidget('click', modelFormattedAccessor, radioAccessor, radioInit),
'select-one': inputWidget('change', modelAccessor, valueAccessor, initWidgetValue(null)),
'select-multiple': inputWidget('change', modelAccessor, optionsAccessor, initWidgetValue([]))
// 'file': fileWidget???
};
function initWidgetValue(initValue) {
return function (model, view) {
var value = view.get();
if (!value && isDefined(initValue)) {
value = copy(initValue);
}
if (isUndefined(model.get()) && isDefined(value)) {
model.set(value);
}
};
}
function radioInit(model, view, element) {
var modelValue = model.get(), viewValue = view.get(), input = element[0];
input.checked = false;
input.name = this.$id + '@' + input.name;
if (isUndefined(modelValue)) {
model.set(modelValue = null);
}
if (modelValue == null && viewValue !== null) {
model.set(viewValue);
}
view.set(modelValue);
}
/**
* @workInProgress
* @ngdoc directive
* @name angular.directive.ng:change
*
* @description
* The directive executes an expression whenever the input widget changes.
*
* @element INPUT
* @param {expression} expression to execute.
*
* @example
* @example
<doc:example>
<doc:source>
<div ng:init="checkboxCount=0; textCount=0"></div>
<input type="text" name="text" ng:change="textCount = 1 + textCount">
changeCount {{textCount}}<br/>
<input type="checkbox" name="checkbox" ng:change="checkboxCount = 1 + checkboxCount">
changeCount {{checkboxCount}}<br/>
</doc:source>
<doc:scenario>
it('should check ng:change', function(){
expect(binding('textCount')).toBe('0');
expect(binding('checkboxCount')).toBe('0');
using('.doc-example-live').input('text').enter('abc');
expect(binding('textCount')).toBe('1');
expect(binding('checkboxCount')).toBe('0');
using('.doc-example-live').input('checkbox').check();
expect(binding('textCount')).toBe('1');
expect(binding('checkboxCount')).toBe('1');
});
</doc:scenario>
</doc:example>
*/
function inputWidget(events, modelAccessor, viewAccessor, initFn, textBox) {
return annotate('$updateView', '$defer', function($updateView, $defer, element) {
var scope = this,
model = modelAccessor(scope, element),
view = viewAccessor(scope, element),
action = element.attr('ng:change') || '',
lastValue;
if (model) {
initFn.call(scope, model, view, element);
this.$eval(element.attr('ng:init')||'');
element.bind(events, function(event){
function handler(){
var value = view.get();
if (!textBox || value != lastValue) {
model.set(value);
lastValue = model.get();
scope.$tryEval(action, element);
$updateView();
}
}
event.type == 'keydown' ? $defer(handler) : handler();
});
scope.$watch(model.get, function(value){
if (lastValue !== value) {
view.set(lastValue = value);
}
});
}
});
}
function inputWidgetSelector(element){
this.directives(true);
this.descend(true);
return INPUT_TYPE[lowercase(element[0].type)] || noop;
}
angularWidget('input', inputWidgetSelector);
angularWidget('textarea', inputWidgetSelector);
/**
* @workInProgress
* @ngdoc directive
* @name angular.directive.ng:options
*
* @description
* Dynamically generate a list of `<option>` elements for a `<select>` element using an array or
* an object obtained by evaluating the `ng:options` expression.
*
* When an item in the select menu is select, the value of array element or object property
* represented by the selected option will be bound to the model identified by the `name` attribute
* of the parent select element.
*
* Optionally, a single hard-coded `<option>` element, with the value set to an empty string, can
* be nested into the `<select>` element. This element will then represent `null` or "not selected"
* option. See example below for demonstration.
*
* Note: `ng:options` provides iterator facility for `<option>` element which must be used instead
* of {@link angular.widget.@ng:repeat ng:repeat}. `ng:repeat` is not suitable for use with
* `<option>` element because of the following reasons:
*
* * value attribute of the option element that we need to bind to requires a string, but the
* source of data for the iteration might be in a form of array containing objects instead of
* strings
* * {@link angular.widget.@ng:repeat ng:repeat} unrolls after the select binds causing
* incorect rendering on most browsers.
* * binding to a value not in list confuses most browsers.
*
* @element select
* @param {comprehension_expression} comprehension in one of the following forms:
*
* * for array data sources:
* * `label` **`for`** `value` **`in`** `array`
* * `select` **`as`** `label` **`for`** `value` **`in`** `array`
* * `label` **`group by`** `group` **`for`** `value` **`in`** `array`
* * `select` **`as`** `label` **`group by`** `group` **`for`** `value` **`in`** `array`
* * for object data sources:
* * `label` **`for (`**`key` **`,`** `value`**`) in`** `object`
* * `select` **`as`** `label` **`for (`**`key` **`,`** `value`**`) in`** `object`
* * `label` **`group by`** `group` **`for (`**`key`**`,`** `value`**`) in`** `object`
* * `select` **`as`** `label` **`group by`** `group`
* **`for` `(`**`key`**`,`** `value`**`) in`** `object`
*
* Where:
*
* * `array` / `object`: an expression which evaluates to an array / object to iterate over.
* * `value`: local variable which will refer to each item in the `array` or each property value
* of `object` during iteration.
* * `key`: local variable which will refer to a property name in `object` during iteration.
* * `label`: The result of this expression will be the label for `<option>` element. The
* `expression` will most likely refer to the `value` variable (e.g. `value.propertyName`).
* * `select`: The result of this expression will be bound to the model of the parent `<select>`
* element. If not specified, `select` expression will default to `value`.
* * `group`: The result of this expression will be used to group options using the `<optgroup>`
* DOM element.
*
* @example
<doc:example>
<doc:source>
<script>
function MyCntrl(){
this.colors = [
{name:'black', shade:'dark'},
{name:'white', shade:'light'},
{name:'red', shade:'dark'},
{name:'blue', shade:'dark'},
{name:'yellow', shade:'light'}
];
this.color = this.colors[2]; // red
}
</script>
<div ng:controller="MyCntrl">
<ul>
<li ng:repeat="color in colors">
Name: <input name="color.name">
[<a href ng:click="colors.$remove(color)">X</a>]
</li>
<li>
[<a href ng:click="colors.push({})">add</a>]
</li>
</ul>
<hr/>
Color (null not allowed):
<select name="color" ng:options="c.name for c in colors"></select><br>
Color (null allowed):
<div class="nullable">
<select name="color" ng:options="c.name for c in colors">
<option value="">-- chose color --</option>
</select>
</div><br/>
Color grouped by shade:
<select name="color" ng:options="c.name group by c.shade for c in colors">
</select><br/>
Select <a href ng:click="color={name:'not in list'}">bogus</a>.<br>
<hr/>
Currently selected: {{ {selected_color:color} }}
<div style="border:solid 1px black; height:20px"
ng:style="{'background-color':color.name}">
</div>
</div>
</doc:source>
<doc:scenario>
it('should check ng:options', function(){
expect(binding('color')).toMatch('red');
select('color').option('0');
expect(binding('color')).toMatch('black');
using('.nullable').select('color').option('');
expect(binding('color')).toMatch('null');
});
</doc:scenario>
</doc:example>
*/
// 00001111100000000000222200000000000000000000003333000000000000044444444444444444000000000555555555555555550000000666666666666666660000000000000007777
var NG_OPTIONS_REGEXP = /^\s*(.*?)(?:\s+as\s+(.*?))?(?:\s+group\s+by\s+(.*))?\s+for\s+(?:([\$\w][\$\w\d]*)|(?:\(\s*([\$\w][\$\w\d]*)\s*,\s*([\$\w][\$\w\d]*)\s*\)))\s+in\s+(.*)$/;
angularWidget('select', function(element){
this.descend(true);
this.directives(true);
var isMultiselect = element.attr('multiple'),
expression = element.attr('ng:options'),
onChange = expressionCompile(element.attr('ng:change') || "").fnSelf,
match;
if (!expression) {
return inputWidgetSelector.call(this, element);
}
if (! (match = expression.match(NG_OPTIONS_REGEXP))) {
throw Error(
"Expected ng:options in form of '_select_ (as _label_)? for (_key_,)?_value_ in _collection_'" +
" but got '" + expression + "'.");
}
var displayFn = expressionCompile(match[2] || match[1]).fnSelf,
valueName = match[4] || match[6],
keyName = match[5],
groupByFn = expressionCompile(match[3] || '').fnSelf,
valueFn = expressionCompile(match[2] ? match[1] : valueName).fnSelf,
valuesFn = expressionCompile(match[7]).fnSelf,
// we can't just jqLite('<option>') since jqLite is not smart enough
// to create it in <select> and IE barfs otherwise.
optionTemplate = jqLite(document.createElement('option')),
optGroupTemplate = jqLite(document.createElement('optgroup')),
nullOption = false; // if false then user will not be able to select it
return function(selectElement){
// This is an array of array of existing option groups in DOM. We try to reuse these if possible
// optionGroupsCache[0] is the options with no option group
// optionGroupsCache[?][0] is the parent: either the SELECT or OPTGROUP element
var optionGroupsCache = [[{element: selectElement, label:''}]],
scope = this,
model = modelAccessor(scope, element);
// find existing special options
forEach(selectElement.children(), function(option){
if (option.value == '')
// User is allowed to select the null.
nullOption = {label:jqLite(option).text(), id:''};
});
selectElement.html(''); // clear contents
selectElement.bind('change', function(){
var optionGroup,
collection = valuesFn(scope) || [],
key = selectElement.val(),
tempScope = inherit(scope),
value, optionElement, index, groupIndex, length, groupLength;
try {
if (isMultiselect) {
value = [];
for (groupIndex = 0, groupLength = optionGroupsCache.length;
groupIndex < groupLength;
groupIndex++) {
// list of options for that group. (first item has the parent)
optionGroup = optionGroupsCache[groupIndex];
for(index = 1, length = optionGroup.length; index < length; index++) {
if ((optionElement = optionGroup[index].element)[0].selected) {
if (keyName) tempScope[keyName] = key;
tempScope[valueName] = collection[optionElement.val()];
value.push(valueFn(tempScope));
}
}
}
} else {
if (key == '?') {
value = undefined;
} else if (key == ''){
value = null;
} else {
tempScope[valueName] = collection[key];
if (keyName) tempScope[keyName] = key;
value = valueFn(tempScope);
}
}
if (isDefined(value) && model.get() !== value) {
onChange(scope);
model.set(value);
}
scope.$tryEval(function(){
scope.$root.$eval();
});
} finally {
tempScope = null; // TODO(misko): needs to be $destroy
}
});
scope.$onEval(function(){
var scope = this,
optionGroups = {'':[]}, // Temporary location for the option groups before we render them
optionGroupNames = [''],
optionGroupName,
optionGroup,
option,
existingParent, existingOptions, existingOption,
values = valuesFn(scope) || [],
keys = values,
key,
groupLength, length,
fragment,
groupIndex, index,
optionElement,
optionScope = inherit(scope),
modelValue = model.get(),
selected,
selectedSet = false, // nothing is selected yet
isMulti = isMultiselect,
lastElement,
element;
try {
if (isMulti) {
selectedSet = new HashMap();
if (modelValue && isNumber(length = modelValue.length)) {
for (index = 0; index < length; index++) {
selectedSet.put(modelValue[index], true);
}
}
} else if (modelValue === null || nullOption) {
// if we are not multiselect, and we are null then we have to add the nullOption
optionGroups[''].push(extend({selected:modelValue === null, id:'', label:''}, nullOption));
selectedSet = true;
}
// If we have a keyName then we are iterating over on object. Grab the keys and sort them.
if(keyName) {
keys = [];
for (key in values) {
if (values.hasOwnProperty(key))
keys.push(key);
}
keys.sort();
}
// We now build up the list of options we need (we merge later)
for (index = 0; length = keys.length, index < length; index++) {
optionScope[valueName] = values[keyName ? optionScope[keyName]=keys[index]:index];
optionGroupName = groupByFn(optionScope) || '';
if (!(optionGroup = optionGroups[optionGroupName])) {
optionGroup = optionGroups[optionGroupName] = [];
optionGroupNames.push(optionGroupName);
}
if (isMulti) {
selected = !!selectedSet.remove(valueFn(optionScope));
} else {
selected = modelValue === valueFn(optionScope);
selectedSet = selectedSet || selected; // see if at least one item is selected
}
optionGroup.push({
id: keyName ? keys[index] : index, // either the index into array or key from object
label: displayFn(optionScope) || '', // what will be seen by the user
selected: selected // determine if we should be selected
});
}
optionGroupNames.sort();
if (!isMulti && !selectedSet) {
// nothing was selected, we have to insert the undefined item
optionGroups[''].unshift({id:'?', label:'', selected:true});
}
// Now we need to update the list of DOM nodes to match the optionGroups we computed above
for (groupIndex = 0, groupLength = optionGroupNames.length;
groupIndex < groupLength;
groupIndex++) {
// current option group name or '' if no group
optionGroupName = optionGroupNames[groupIndex];
// list of options for that group. (first item has the parent)
optionGroup = optionGroups[optionGroupName];
if (optionGroupsCache.length <= groupIndex) {
// we need to grow the optionGroups
optionGroupsCache.push(
existingOptions = [
existingParent = {
element: optGroupTemplate.clone().attr('label', optionGroupName),
label: optionGroup.label
}
]
);
selectElement.append(existingParent.element);
} else {
existingOptions = optionGroupsCache[groupIndex];
existingParent = existingOptions[0]; // either SELECT (no group) or OPTGROUP element
// update the OPTGROUP label if not the same.
if (existingParent.label != optionGroupName) {
existingParent.element.attr('label', existingParent.label = optionGroupName);
}
}
lastElement = null; // start at the begining
for(index = 0, length = optionGroup.length; index < length; index++) {
option = optionGroup[index];
if (existingOption = existingOptions[index+1]) {
// reuse elements
lastElement = existingOption.element;
if (existingOption.label !== option.label) {
lastElement.text(existingOption.label = option.label);
}
if (existingOption.id !== option.id) {
lastElement.val(existingOption.id = option.id);
}
if (existingOption.selected !== option.selected) {
lastElement.attr('selected', option.selected);
}
} else {
// grow elements
// jQuery(v1.4.2) Bug: We should be able to chain the method calls, but
// in this version of jQuery on some browser the .text() returns a string
// rather then the element.
(element = optionTemplate.clone())
.val(option.id)
.attr('selected', option.selected)
.text(option.label);
existingOptions.push(existingOption = {
element: element,
label: option.label,
id: option.id,
checked: option.selected
});
if (lastElement) {
lastElement.after(element);
} else {
existingParent.element.append(element);
}
lastElement = element;
}
}
// remove any excessive OPTIONs in a group
index++; // increment since the existingOptions[0] is parent element not OPTION
while(existingOptions.length > index) {
existingOptions.pop().element.remove();
}
}
// remove any excessive OPTGROUPs from select
while(optionGroupsCache.length > groupIndex) {
optionGroupsCache.pop()[0].element.remove();
}
} finally {
optionScope = null; // TODO(misko): needs to be $destroy()
}
});
};
});
/**
* @workInProgress
* @ngdoc widget
* @name angular.widget.ng:include
*
* @description
* Fetches, compiles and includes an external HTML fragment.
*
* Keep in mind that Same Origin Policy applies to included resources
* (e.g. ng:include won't work for file:// access).
*
* @param {string} src angular expression evaluating to URL. If the source is a string constant,
* make sure you wrap it in quotes, e.g. `src="'myPartialTemplate.html'"`.
* @param {Scope=} [scope=new_child_scope] optional expression which evaluates to an
* instance of angular.scope to set the HTML fragment to.
* @param {string=} onload Expression to evaluate when a new partial is loaded.
*
* @example
<doc:example>
<doc:source jsfiddle="false">
<select name="url">
<option value="examples/ng-include/template1.html">template1.html</option>
<option value="examples/ng-include/template2.html">template2.html</option>
<option value="">(blank)</option>
</select>
url of the template: <tt><a href="{{url}}">{{url}}</a></tt>
<hr/>
<ng:include src="url"></ng:include>
</doc:source>
<doc:scenario>
it('should load template1.html', function(){
expect(element('.doc-example-live ng\\:include').text()).
toBe('Content of template1.html\n');
});
it('should load template2.html', function(){
select('url').option('examples/ng-include/template2.html');
expect(element('.doc-example-live ng\\:include').text()).
toBe('Content of template2.html\n');
});
it('should change to blank', function(){
select('url').option('');
expect(element('.doc-example-live ng\\:include').text()).toEqual('');
});
</doc:scenario>
</doc:example>
*/
angularWidget('ng:include', function(element){
var compiler = this,
srcExp = element.attr("src"),
scopeExp = element.attr("scope") || '',
onloadExp = element[0].getAttribute('onload') || ''; //workaround for jquery bug #7537
if (element[0]['ng:compiled']) {
this.descend(true);
this.directives(true);
} else {
element[0]['ng:compiled'] = true;
return extend(function(xhr, element){
var scope = this, childScope;
var changeCounter = 0;
var preventRecursion = false;
function incrementChange(){ changeCounter++;}
this.$watch(srcExp, incrementChange);