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/**
* @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) {
assignFn(scope, value);
}
}
};
}
}
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(scope, 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 bellow 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),
buttonWidget = inputWidget('click', noopAccessor, noopAccessor, noop),
INPUT_TYPE = {
'text': textWidget,
'textarea': textWidget,
'hidden': textWidget,
'password': textWidget,
'button': buttonWidget,
'submit': buttonWidget,
'reset': buttonWidget,
'image': buttonWidget,
'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('$defer', function($defer, element) {
var scope = this,
model = modelAccessor(scope, element),
view = viewAccessor(scope, element),
action = element.attr('ng:change') || noop,
lastValue;
if (model) {
initFn.call(scope, model, view, element);
scope.$eval(element.attr('ng:init') || noop);
element.bind(events, function(event){
function handler(){
scope.$apply(function(){
var value = view.get();
if (!textBox || value != lastValue) {
model.set(value);
lastValue = model.get();
scope.$eval(action);
}
});
}
event.type == 'keydown' ? $defer(handler) : handler();
});
scope.$watch(model.get, function(scope, value){
if (!equals(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);
angularWidget('button', inputWidgetSelector);
/**
* @workInProgress
* @ngdoc directive
* @name angular.directive.ng:options
*
* @description
* Dynamically generate a list of `<option>` elements for a `<select>` element using the array
* obtained by evaluating the `ng:options` expression.
*
* When an item in the select menu is select, the array element 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 _expresion_ `for` _item_ `in` _array_.
*
* * _array_: an expression which evaluates to an array of objects to bind.
* * _item_: local variable which will reffer to the item in the _array_ during the itteration
* * _expression_: The result of this expression will is `option` label. The
* `expression` most likely reffers to the _item_ varibale.
*
* @example
<doc:example>
<doc:source>
<script>
function MyCntrl(){
this.colors = [
{name:'black'},
{name:'white'},
{name:'red'},
{name:'blue'},
{name:'green'}
];
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.$remove(color)">X</a>]
</li>
<li>
[<a href ng:click="colors.push({})">add</a>]
</li>
</ul>
<hr/>
Color (null not allowed):
<select name="color" ng:options="c.name for c in colors"></select><br/>
Color (null allowed):
<select name="color" ng:options="c.name for c in colors">
<option value="">-- chose color --</option>
</select><br/>
Select <a href ng:click="color={name:'not in list'}">bogus</a>. <br/>
<hr/>
Currently selected: {{ {selected_color:color} }}
<div style="border:solid 1px black;"
ng:style="{'background-color':color.name}">
</div>
</div>
</doc:source>
<doc:scenario>
it('should check ng:options', function(){
expect(binding('color')).toMatch('red');
select('color').option('0');
expect(binding('color')).toMatch('black');
select('color').option('');
expect(binding('color')).toMatch('null');
});
</doc:scenario>
</doc:example>
*/
var NG_OPTIONS_REGEXP = /^(.*)\s+for\s+([\$\w][\$\w\d]*)\s+in\s+(.*)$/;
angularWidget('select', function(element){
this.descend(true);
this.directives(true);
var isMultiselect = element.attr('multiple');
var expression = element.attr('ng:options');
var match;
if (!expression) {
return inputWidgetSelector.call(this, element);
}
if (! (match = expression.match(NG_OPTIONS_REGEXP))) {
throw Error(
"Expected ng:options in form of '_expresion_ for _item_ in _collection_' but got '" +
expression + "'.");
}
var displayFn = compileExpr(match[1]);
var itemName = match[2];
var collectionFn = compileExpr(match[3]);
// we can't just jqLite('<option>') since jqLite is not smart enough
// to create it in <select> and IE barfs otherwise.
var option = jqLite(document.createElement('option'));
return function(select){
var scope = this;
var optionElements = [];
var optionTexts = [];
var lastSelectValue = isMultiselect ? {} : false;
var nullOption = option.clone().val('');
var missingOption = option.clone().val('?');
var model = modelAccessor(scope, element);
// find existing special options
forEach(select.children(), function(option){
if (option.value == '') nullOption = false;
});
select.bind('change', function(){
var collection = collectionFn(scope) || [];
var value = select.val();
var index, length;
if (isMultiselect) {
value = [];
for (index = 0, length = optionElements.length; index < length; index++) {
if (optionElements[index][0].selected) {
value.push(collection[index]);
}
}
} else {
if (value == '?') {
value = undefined;
} else {
value = (value == '' ? null : collection[value]);
}
}
if (value !== undefined) model.set(value);
scope.$apply();
});
this.$observe(function(scope){
var collection = collectionFn(scope) || [];
var value;
var length;
var fragment;
var index;
var optionText;
var optionElement;
var optionScope = scope.$new();
var modelValue = model.get();
var currentItem;
var selectValue = '';
var isMulti = isMultiselect;
if (isMulti) {
selectValue = new HashMap();
if (modelValue && isNumber(length = modelValue.length)) {
for (index = 0; index < length; index++) {
selectValue.put(modelValue[index], true);
}
}
}
try {
for (index = 0, length = collection.length; index < length; index++) {
currentItem = optionScope[itemName] = collection[index];
optionText = displayFn(optionScope);
if (optionTexts.length > index) {
// reuse
optionElement = optionElements[index];
if (optionText != optionTexts[index]) {
(optionElement).text(optionTexts[index] = optionText);
}
} else {
// grow
if (!fragment) {
fragment = document.createDocumentFragment();
}
optionTexts.push(optionText);
optionElements.push(optionElement = option.clone());
optionElement.attr('value', index).text(optionText);
fragment.appendChild(optionElement[0]);
}
if (isMulti) {
if (lastSelectValue[index] != (value = selectValue.remove(currentItem))) {
optionElement[0].selected = !!(lastSelectValue[index] = value);
}
} else {
if (modelValue == currentItem) {
selectValue = index;
}
}
}
if (fragment) select.append(jqLite(fragment));
// shrink children
while(optionElements.length > index) {
optionElements.pop().remove();
delete lastSelectValue[optionElements.length];
}
if (!isMulti) {
if (selectValue === '' && modelValue) {
// We could not find a match
selectValue = '?';
}
// update the selected item
if (lastSelectValue !== selectValue) {
if (nullOption) {
if (lastSelectValue == '') nullOption.remove();
if (selectValue === '') select.prepend(nullOption);
}
if (missingOption) {
if (lastSelectValue == '?') missingOption.remove();
if (selectValue === '?') select.prepend(missingOption);
}
select.val(lastSelectValue = selectValue);
}
}
} finally {
optionScope.$destroy();
}
});
};
});
/**
* @workInProgress
* @ngdoc widget
* @name angular.widget.ng:include
*
* @description
* Include 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 expression evaluating to URL.
* @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>
<select name="url">
<option value="angular.filter.date.html">date filter</option>
<option value="angular.filter.html.html">html filter</option>
<option value="">(blank)</option>
</select>
<tt>url = <a href="{{url}}">{{url}}</a></tt>
<hr/>
<ng:include src="url"></ng:include>
</doc:source>
<doc:scenario>
it('should load date filter', function(){
expect(element('.doc-example-live ng\\:include').text()).toMatch(/angular\.filter\.date/);
});
it('should change to html filter', function(){
select('url').option('angular.filter.html.html');
expect(element('.doc-example-live ng\\:include').text()).toMatch(/angular\.filter\.html/);
});
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,
changeCounter = 0,
releaseScopes = [],
childScope,
oldScope;
function incrementChange(){ changeCounter++;}
this.$observe(srcExp, incrementChange);
this.$observe(function(scope){
var newScope = scope.$eval(scopeExp);
if (newScope !== oldScope) {
oldScope = newScope;
incrementChange();
}
});
this.$observe(function(){return changeCounter;}, function(scope){
var src = scope.$eval(srcExp),
useScope = scope.$eval(scopeExp);
while(releaseScopes.length) {
releaseScopes.pop().$destroy();
}
if (src) {
xhr('GET', src, null, function(code, response){
element.html(response);
if (useScope) {
childScope = useScope;
} else {
releaseScopes.push(childScope = scope.$new());
}
compiler.compile(element)(childScope);
scope.$eval(onloadExp);
}, false, true);
} else {
childScope = null;
element.html('');
}
});
}, {$inject:['$xhr.cache']});
}
});
/**
* @workInProgress
* @ngdoc widget
* @name angular.widget.ng:switch
*
* @description
* Conditionally change the DOM structure.
*
* @usageContent
* <any ng:switch-when="matchValue1">...</any>
* <any ng:switch-when="matchValue2">...</any>
* ...
* <any ng:switch-default>...</any>
*
* @param {*} on expression to match against <tt>ng:switch-when</tt>.
* @paramDescription
* On child elments add:
*
* * `ng:switch-when`: the case statement to match against. If match then this
* case will be displayed.
* * `ng:switch-default`: the default case when no other casses match.
*
* @example
<doc:example>
<doc:source>
<select name="switch">
<option>settings</option>
<option>home</option>
<option>other</option>
</select>
<tt>switch={{switch}}</tt>
</hr>
<ng:switch on="switch" >
<div ng:switch-when="settings">Settings Div</div>
<span ng:switch-when="home">Home Span</span>
<span ng:switch-default>default</span>
</ng:switch>
</code>
</doc:source>
<doc:scenario>
it('should start in settings', function(){
expect(element('.doc-example-live ng\\:switch').text()).toEqual('Settings Div');
});
it('should change to home', function(){
select('switch').option('home');
expect(element('.doc-example-live ng\\:switch').text()).toEqual('Home Span');
});
it('should select deafault', function(){
select('switch').option('other');
expect(element('.doc-example-live ng\\:switch').text()).toEqual('default');
});
</doc:scenario>
</doc:example>
*/
angularWidget('ng:switch', function (element){
var compiler = this,
watchExpr = element.attr("on"),
changeExpr = element.attr('change'),
casesTemplate = {},
defaultCaseTemplate,
children = element.children(),
length = children.length,
child,
when;
if (!watchExpr) throw new Error("Missing 'on' attribute.");
while(length--) {
child = jqLite(children[length]);
// this needs to be here for IE
child.remove();
when = child.attr('ng:switch-when');
if (isString(when)) {
casesTemplate[when] = compiler.compile(child);
} else if (isString(child.attr('ng:switch-default'))) {
defaultCaseTemplate = compiler.compile(child);
}
}
children = null; // release memory;
element.html('');
return function(element){
var changeCounter = 0;
var childScope;
var selectedTemplate;
this.$watch(watchExpr, function(scope, value){
element.html('');
if (selectedTemplate = casesTemplate[value] || defaultCaseTemplate) {
changeCounter++;
if (childScope) childScope.$destroy();
childScope = scope.$new();
childScope.$eval(changeExpr);
}
})();
this.$observe(function(){return changeCounter;}, function(){
element.html('');
if (selectedTemplate) {
selectedTemplate(childScope, function(caseElement){
element.append(caseElement);
});
}
});
};
});
/*
* Modifies the default behavior of html A tag, so that the default action is prevented when href
* attribute is empty.
*
* The reasoning for this change is to allow easy creation of action links with ng:click without
* changing the location or causing page reloads, e.g.:
* <a href="" ng:click="model.$save()">Save</a>
*/
angularWidget('a', function() {
this.descend(true);
this.directives(true);
return function(element) {
if (element.attr('href') === '') {
element.bind('click', function(event){
event.preventDefault();
});
}
};
});
/**
* @workInProgress
* @ngdoc widget
* @name angular.widget.@ng:repeat
You can’t perform that action at this time.