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ionic/src/navigation/view-controller.ts at master · javascript2016/ionic · GitHub
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navigation
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import
{
ComponentRef
,
ElementRef
,
EventEmitter
,
Output
,
Renderer
}
from
'@angular/core'
;
import
{
assert
,
isPresent
}
from
'../util/util'
;
import
{
NavController
}
from
'./nav-controller'
;
import
{
NavOptions
,
STATE_ATTACHED
,
STATE_DESTROYED
,
STATE_INITIALIZED
,
STATE_NEW
}
from
'./nav-util'
;
import
{
NavParams
}
from
'./nav-params'
;
import
{
Content
,
Footer
,
Header
,
Navbar
}
from
'./nav-interfaces'
;
/**
*
@name
ViewController
*
@description
* Access various features and information about the current view.
*
@usage
* ```ts
* import { Component } from '@angular/core';
* import { ViewController } from 'ionic-angular';
*
*
@Component
({...})
* export class MyPage{
*
* constructor(public viewCtrl: ViewController) {}
*
* }
* ```
*/
export
class
ViewController
{
private
_cntDir
:
any
;
private
_cntRef
:
ElementRef
;
private
_ionCntDir
:
Content
;
private
_ionCntRef
:
ElementRef
;
private
_hdrDir
:
Header
;
private
_ftrDir
:
Footer
;
private
_isHidden
:
boolean
=
false
;
private
_leavingOpts
:
NavOptions
;
private
_nb
:
Navbar
;
private
_onDidDismiss
:
(
data
:
any
,
role
:
string
)
=>
void
;
private
_onWillDismiss
:
(
data
:
any
,
role
:
string
)
=>
void
;
private
_dismissData
:
any
;
private
_dismissRole
:
string
;
private
_detached
:
boolean
;
_cmp
:
ComponentRef
<
any
>
;
_nav
:
NavController
;
_zIndex
:
number
;
_state
:
number
=
STATE_NEW
;
_cssClass
:
string
;
_ts
:
number
;
/**
* Observable to be subscribed to when the current component will become active
*
@returns
{
Observable
} Returns an observable
*/
willEnter
:
EventEmitter
<
any
>
=
new
EventEmitter
(
)
;
/**
* Observable to be subscribed to when the current component has become active
*
@returns
{
Observable
} Returns an observable
*/
didEnter
:
EventEmitter
<
any
>
=
new
EventEmitter
(
)
;
/**
* Observable to be subscribed to when the current component will no longer be active
*
@returns
{
Observable
} Returns an observable
*/
willLeave
:
EventEmitter
<
any
>
=
new
EventEmitter
(
)
;
/**
* Observable to be subscribed to when the current component is no long active
*
@returns
{
Observable
} Returns an observable
*/
didLeave
:
EventEmitter
<
any
>
=
new
EventEmitter
(
)
;
/**
* Observable to be subscribed to when the current component has been destroyed
*
@returns
{
Observable
} Returns an observable
*/
willUnload
:
EventEmitter
<
any
>
=
new
EventEmitter
(
)
;
/**
*
@hidden
*/
readReady
:
EventEmitter
<
any
>
=
new
EventEmitter
<
any
>
(
)
;
/**
*
@hidden
*/
writeReady
:
EventEmitter
<
any
>
=
new
EventEmitter
<
any
>
(
)
;
/**
@hidden
*/
data
:
any
;
/**
@hidden
*/
instance
:
any
;
/**
@hidden
*/
id
:
string
;
/**
@hidden
*/
isOverlay
:
boolean
=
false
;
/**
@hidden
*/
@
Output
(
)
private
_emitter
:
EventEmitter
<
any
>
=
new
EventEmitter
(
)
;
constructor
(
public
component
?:
any
,
data
?:
any
,
rootCssClass
:
string
=
DEFAULT_CSS_CLASS
)
{
// passed in data could be NavParams, but all we care about is its data object
this
.
data
=
(
data
instanceof
NavParams
?
data
.
data
:
(
isPresent
(
data
)
?
data
:
{
}
)
)
;
this
.
_cssClass
=
rootCssClass
;
this
.
_ts
=
Date
.
now
(
)
;
window
.
addEventListener
(
'orientationchange'
,
this
.
handleOrientationChange
.
bind
(
this
)
)
;
}
handleOrientationChange
(
)
{
if
(
this
.
getContent
(
)
)
{
this
.
getContent
(
)
.
resize
(
)
;
}
}
/**
*
@hidden
*/
init
(
componentRef
:
ComponentRef
<
any
>
)
{
assert
(
componentRef
,
'componentRef can not be null'
)
;
this
.
_ts
=
Date
.
now
(
)
;
this
.
_cmp
=
componentRef
;
this
.
instance
=
this
.
instance
||
componentRef
.
instance
;
this
.
_detached
=
false
;
}
_setNav
(
navCtrl
:
NavController
)
{
this
.
_nav
=
navCtrl
;
}
_setInstance
(
instance
:
any
)
{
this
.
instance
=
instance
;
}
/**
*
@hidden
*/
subscribe
(
generatorOrNext
?:
any
)
:
any
{
return
this
.
_emitter
.
subscribe
(
generatorOrNext
)
;
}
/**
*
@hidden
*/
emit
(
data
?:
any
)
{
this
.
_emitter
.
emit
(
data
)
;
}
/**
* Called when the current viewController has be successfully dismissed
*/
onDidDismiss
(
callback
:
(
data
:
any
,
role
:
string
)
=>
void
)
{
this
.
_onDidDismiss
=
callback
;
}
/**
* Called when the current viewController will be dismissed
*/
onWillDismiss
(
callback
:
(
data
:
any
,
role
:
string
)
=>
void
)
{
this
.
_onWillDismiss
=
callback
;
}
/**
* Dismiss the current viewController
*
@param
{
any
} [data] Data that you want to return when the viewController is dismissed.
*
@param
{
any
} [role ]
*
@param
{
NavOptions
} navOptions Options for the dismiss navigation.
*
@returns
{
any
} data Returns the data passed in, if any.
*/
dismiss
(
data
?:
any
,
role
?:
string
,
navOptions
:
NavOptions
=
{
}
)
:
Promise
<
any
>
{
if
(
!
this
.
_nav
)
{
assert
(
this
.
_state
===
STATE_DESTROYED
,
'ViewController does not have a valid _nav'
)
;
return
Promise
.
resolve
(
false
)
;
}
if
(
this
.
isOverlay
&&
!
navOptions
.
minClickBlockDuration
)
{
// This is a Modal being dismissed so we need
// to add the minClickBlockDuration option
// for UIWebView
navOptions
.
minClickBlockDuration
=
400
;
}
this
.
_dismissData
=
data
;
this
.
_dismissRole
=
role
;
const
options
=
Object
.
assign
(
{
}
,
this
.
_leavingOpts
,
navOptions
)
;
return
this
.
_nav
.
removeView
(
this
,
options
)
.
then
(
(
)
=>
data
)
;
}
/**
*
@hidden
*/
getNav
(
)
:
NavController
{
return
this
.
_nav
;
}
/**
*
@hidden
*/
getTransitionName
(
_direction
:
string
)
:
string
{
return
this
.
_nav
&&
this
.
_nav
.
config
.
get
(
'pageTransition'
)
;
}
/**
*
@hidden
*/
getNavParams
(
)
:
NavParams
{
return
new
NavParams
(
this
.
data
)
;
}
/**
*
@hidden
*/
setLeavingOpts
(
opts
:
NavOptions
)
{
this
.
_leavingOpts
=
opts
;
}
/**
* Check to see if you can go back in the navigation stack.
*
@returns
{
boolean
} Returns if it's possible to go back from this Page.
*/
enableBack
(
)
:
boolean
{
// update if it's possible to go back from this nav item
if
(
!
this
.
_nav
)
{
return
false
;
}
// the previous view may exist, but if it's about to be destroyed
// it shouldn't be able to go back to
const
previousItem
=
this
.
_nav
.
getPrevious
(
this
)
;
return
!
!
(
previousItem
)
;
}
/**
*
@hidden
*/
get
name
(
)
:
string
{
return
(
this
.
component
?
this
.
component
.
name
:
''
)
;
}
/**
* Get the index of the current component in the current navigation stack.
*
@returns
{
number
} Returns the index of this page within its `NavController`.
*/
get
index
(
)
:
number
{
return
(
this
.
_nav
?
this
.
_nav
.
indexOf
(
this
)
:
-
1
)
;
}
/**
*
@returns
{
boolean
} Returns if this Page is the first in the stack of pages within its NavController.
*/
isFirst
(
)
:
boolean
{
return
(
this
.
_nav
?
this
.
_nav
.
first
(
)
===
this
:
false
)
;
}
/**
*
@returns
{
boolean
} Returns if this Page is the last in the stack of pages within its NavController.
*/
isLast
(
)
:
boolean
{
return
(
this
.
_nav
?
this
.
_nav
.
last
(
)
===
this
:
false
)
;
}
/**
*
@hidden
* DOM WRITE
*/
_domShow
(
shouldShow
:
boolean
,
renderer
:
Renderer
)
{
// using hidden element attribute to display:none and not render views
// _hidden value of '' means the hidden attribute will be added
// _hidden value of null means the hidden attribute will be removed
// doing checks to make sure we only update the DOM when actually needed
// if it should render, then the hidden attribute should not be on the element
if
(
this
.
_cmp
&&
shouldShow
===
this
.
_isHidden
)
{
this
.
_isHidden
=
!
shouldShow
;
let
value
=
(
shouldShow
?
null
:
''
)
;
// ******** DOM WRITE ****************
renderer
.
setElementAttribute
(
this
.
pageRef
(
)
.
nativeElement
,
'hidden'
,
value
)
;
}
}
/**
*
@hidden
*/
getZIndex
(
)
:
number
{
return
this
.
_zIndex
;
}
/**
*
@hidden
* DOM WRITE
*/
_setZIndex
(
zIndex
:
number
,
renderer
:
Renderer
)
{
if
(
zIndex
!==
this
.
_zIndex
)
{
this
.
_zIndex
=
zIndex
;
const
pageRef
=
this
.
pageRef
(
)
;
if
(
pageRef
)
{
// ******** DOM WRITE ****************
renderer
.
setElementStyle
(
pageRef
.
nativeElement
,
'z-index'
,
(
<
any
>
zIndex
)
)
;
}
}
}
/**
*
@returns
{
ElementRef
} Returns the Page's ElementRef.
*/
pageRef
(
)
:
ElementRef
{
return
this
.
_cmp
&&
this
.
_cmp
.
location
;
}
_setContent
(
directive
:
any
)
{
this
.
_cntDir
=
directive
;
}
/**
*
@returns
{
component
} Returns the Page's Content component reference.
*/
getContent
(
)
:
any
{
return
this
.
_cntDir
;
}
_setContentRef
(
elementRef
:
ElementRef
)
{
this
.
_cntRef
=
elementRef
;
}
/**
*
@returns
{
ElementRef
} Returns the Content's ElementRef.
*/
contentRef
(
)
:
ElementRef
{
return
this
.
_cntRef
;
}
_setIONContent
(
content
:
Content
)
{
this
.
_setContent
(
content
)
;
this
.
_ionCntDir
=
content
;
}
/**
*
@hidden
*/
getIONContent
(
)
:
Content
{
return
this
.
_ionCntDir
;
}
_setIONContentRef
(
elementRef
:
ElementRef
)
{
this
.
_setContentRef
(
elementRef
)
;
this
.
_ionCntRef
=
elementRef
;
}
/**
*
@hidden
*/
getIONContentRef
(
)
:
ElementRef
{
return
this
.
_ionCntRef
;
}
_setHeader
(
directive
:
Header
)
{
this
.
_hdrDir
=
directive
;
}
/**
*
@hidden
*/
getHeader
(
)
:
Header
{
return
this
.
_hdrDir
;
}
_setFooter
(
directive
:
Footer
)
{
this
.
_ftrDir
=
directive
;
}
/**
*
@hidden
*/
getFooter
(
)
:
Footer
{
return
this
.
_ftrDir
;
}
_setNavbar
(
directive
:
Navbar
)
{
this
.
_nb
=
directive
;
}
/**
*
@hidden
*/
getNavbar
(
)
:
Navbar
{
return
this
.
_nb
;
}
/**
* Find out if the current component has a NavBar or not. Be sure
* to wrap this in an `ionViewWillEnter` method in order to make sure
* the view has rendered fully.
*
@returns
{
boolean
} Returns a boolean if this Page has a navbar or not.
*/
hasNavbar
(
)
:
boolean
{
return
!
!
this
.
_nb
;
}
/**
* Change the title of the back-button. Be sure to call this
* after `ionViewWillEnter` to make sure the DOM has been rendered.
*
@param
{
string
} val Set the back button text.
*/
setBackButtonText
(
val
:
string
)
{
this
.
_nb
&&
this
.
_nb
.
setBackButtonText
(
val
)
;
}
/**
* Set if the back button for the current view is visible or not. Be sure to call this
* after `ionViewWillEnter` to make sure the DOM has been rendered.
*
@param
{
boolean
} Set if this Page's back button should show or not.
*/
showBackButton
(
shouldShow
:
boolean
)
{
if
(
this
.
_nb
)
{
this
.
_nb
.
hideBackButton
=
!
shouldShow
;
}
}
_preLoad
(
)
{
assert
(
this
.
_state
===
STATE_INITIALIZED
,
'view state must be INITIALIZED'
)
;
this
.
_lifecycle
(
'PreLoad'
)
;
}
/**
*
@hidden
* The view has loaded. This event only happens once per view will be created.
* This event is fired before the component and his children have been initialized.
*/
_willLoad
(
)
{
assert
(
this
.
_state
===
STATE_INITIALIZED
,
'view state must be INITIALIZED'
)
;
this
.
_lifecycle
(
'WillLoad'
)
;
}
/**
*
@hidden
* The view has loaded. This event only happens once per view being
* created. If a view leaves but is cached, then this will not
* fire again on a subsequent viewing. This method is a good place
* to put your setup code for the view; however, it is not the
* recommended method to use when a view becomes active.
*/
_didLoad
(
)
{
assert
(
this
.
_state
===
STATE_ATTACHED
,
'view state must be ATTACHED'
)
;
this
.
_lifecycle
(
'DidLoad'
)
;
}
/**
*
@hidden
* The view is about to enter and become the active view.
*/
_willEnter
(
)
{
this
.
handleOrientationChange
(
)
;
assert
(
this
.
_state
===
STATE_ATTACHED
,
'view state must be ATTACHED'
)
;
if
(
this
.
_detached
&&
this
.
_cmp
)
{
// ensure this has been re-attached to the change detector
this
.
_cmp
.
changeDetectorRef
.
reattach
(
)
;
this
.
_detached
=
false
;
}
this
.
willEnter
.
emit
(
null
)
;
this
.
_lifecycle
(
'WillEnter'
)
;
}
/**
*
@hidden
* The view has fully entered and is now the active view. This
* will fire, whether it was the first load or loaded from the cache.
*/
_didEnter
(
)
{
assert
(
this
.
_state
===
STATE_ATTACHED
,
'view state must be ATTACHED'
)
;
this
.
_nb
&&
this
.
_nb
.
didEnter
(
)
;
this
.
didEnter
.
emit
(
null
)
;
this
.
_lifecycle
(
'DidEnter'
)
;
}
/**
*
@hidden
* The view is about to leave and no longer be the active view.
*/
_willLeave
(
willUnload
:
boolean
)
{
this
.
willLeave
.
emit
(
null
)
;
this
.
_lifecycle
(
'WillLeave'
)
;
if
(
willUnload
&&
this
.
_onWillDismiss
)
{
this
.
_onWillDismiss
(
this
.
_dismissData
,
this
.
_dismissRole
)
;
this
.
_onWillDismiss
=
null
;
}
}
/**
*
@hidden
* The view has finished leaving and is no longer the active view. This
* will fire, whether it is cached or unloaded.
*/
_didLeave
(
)
{
this
.
didLeave
.
emit
(
null
)
;
this
.
_lifecycle
(
'DidLeave'
)
;
// when this is not the active page
// we no longer need to detect changes
if
(
!
this
.
_detached
&&
this
.
_cmp
)
{
this
.
_cmp
.
changeDetectorRef
.
detach
(
)
;
this
.
_detached
=
true
;
}
}
/**
*
@hidden
*/
_willUnload
(
)
{
this
.
willUnload
.
emit
(
null
)
;
this
.
_lifecycle
(
'WillUnload'
)
;
this
.
_onDidDismiss
&&
this
.
_onDidDismiss
(
this
.
_dismissData
,
this
.
_dismissRole
)
;
this
.
_onDidDismiss
=
null
;
this
.
_dismissData
=
null
;
this
.
_dismissRole
=
null
;
}
/**
*
@hidden
* DOM WRITE
*/
_destroy
(
renderer
:
Renderer
)
{
assert
(
this
.
_state
!==
STATE_DESTROYED
,
'view state must be ATTACHED'
)
;
if
(
this
.
_cmp
)
{
if
(
renderer
)
{
// ensure the element is cleaned up for when the view pool reuses this element
// ******** DOM WRITE ****************
var
cmpEle
=
this
.
_cmp
.
location
.
nativeElement
;
renderer
.
setElementAttribute
(
cmpEle
,
'class'
,
null
)
;
renderer
.
setElementAttribute
(
cmpEle
,
'style'
,
null
)
;
}
window
.
removeEventListener
(
'orientationchange'
,
this
.
handleOrientationChange
.
bind
(
this
)
)
;
// completely destroy this component. boom.
this
.
_cmp
.
destroy
(
)
;
}
this
.
_nav
=
this
.
_cmp
=
this
.
instance
=
this
.
_cntDir
=
this
.
_cntRef
=
this
.
_leavingOpts
=
this
.
_hdrDir
=
this
.
_ftrDir
=
this
.
_nb
=
this
.
_onDidDismiss
=
this
.
_onWillDismiss
=
null
;
this
.
_state
=
STATE_DESTROYED
;
}
/**
*
@hidden
*/
_lifecycleTest
(
lifecycle
:
string
)
:
Promise
<
boolean
>
{
const
instance
=
this
.
instance
;
const
methodName
=
'ionViewCan'
+
lifecycle
;
if
(
instance
&&
instance
[
methodName
]
)
{
try
{
var
result
=
instance
[
methodName
]
(
)
;
if
(
result
instanceof
Promise
)
{
return
result
;
}
else
{
// Any value but explitic false, should be true
return
Promise
.
resolve
(
result
!==
false
)
;
}
}
catch
(
e
)
{
return
Promise
.
reject
(
`
${
this
.
name
}
${
methodName
}
error:
${
e
.
message
}
`
)
;
}
}
return
Promise
.
resolve
(
true
)
;
}
/**
*
@hidden
*/
_lifecycle
(
lifecycle
:
string
)
{
const
instance
=
this
.
instance
;
const
methodName
=
'ionView'
+
lifecycle
;
if
(
instance
&&
instance
[
methodName
]
)
{
instance
[
methodName
]
(
)
;
}
}
}
export
function
isViewController
(
viewCtrl
:
any
)
:
boolean
{
return
!
!
(
viewCtrl
&&
(
<
ViewController
>
viewCtrl
)
.
_didLoad
&&
(
<
ViewController
>
viewCtrl
)
.
_willUnload
)
;
}
const
DEFAULT_CSS_CLASS
=
'ion-page'
;
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