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atom/src/pane-element.js at master · rishikumar/atom · GitHub
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pane-element.js
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const
path
=
require
(
'path'
)
const
{
CompositeDisposable
}
=
require
(
'event-kit'
)
class
PaneElement
extends
HTMLElement
{
createdCallback
(
)
{
this
.
attached
=
false
this
.
subscriptions
=
new
CompositeDisposable
(
)
this
.
inlineDisplayStyles
=
new
WeakMap
(
)
this
.
initializeContent
(
)
this
.
subscribeToDOMEvents
(
)
}
attachedCallback
(
)
{
this
.
attached
=
true
if
(
this
.
model
.
isFocused
(
)
)
{
this
.
focus
(
)
}
}
detachedCallback
(
)
{
this
.
attached
=
false
}
initializeContent
(
)
{
this
.
setAttribute
(
'class'
,
'pane'
)
this
.
setAttribute
(
'tabindex'
,
-
1
)
this
.
itemViews
=
document
.
createElement
(
'div'
)
this
.
appendChild
(
this
.
itemViews
)
this
.
itemViews
.
setAttribute
(
'class'
,
'item-views'
)
}
subscribeToDOMEvents
(
)
{
const
handleFocus
=
event
=>
{
if
(
!
(
this
.
isActivating
||
this
.
model
.
isDestroyed
(
)
||
this
.
contains
(
event
.
relatedTarget
)
)
)
{
this
.
model
.
focus
(
)
}
if
(
event
.
target
!==
this
)
return
const
view
=
this
.
getActiveView
(
)
if
(
view
)
{
view
.
focus
(
)
event
.
stopPropagation
(
)
}
}
const
handleBlur
=
event
=>
{
if
(
!
this
.
contains
(
event
.
relatedTarget
)
)
{
this
.
model
.
blur
(
)
}
}
const
handleDragOver
=
event
=>
{
event
.
preventDefault
(
)
event
.
stopPropagation
(
)
}
const
handleDrop
=
event
=>
{
event
.
preventDefault
(
)
event
.
stopPropagation
(
)
this
.
getModel
(
)
.
activate
(
)
const
pathsToOpen
=
[
...
event
.
dataTransfer
.
files
]
.
map
(
file
=>
file
.
path
)
if
(
pathsToOpen
.
length
>
0
)
{
this
.
applicationDelegate
.
open
(
{
pathsToOpen
}
)
}
}
this
.
addEventListener
(
'focus'
,
handleFocus
,
true
)
this
.
addEventListener
(
'blur'
,
handleBlur
,
true
)
this
.
addEventListener
(
'dragover'
,
handleDragOver
)
this
.
addEventListener
(
'drop'
,
handleDrop
)
}
initialize
(
model
,
{
views
,
applicationDelegate
}
)
{
this
.
model
=
model
this
.
views
=
views
this
.
applicationDelegate
=
applicationDelegate
if
(
this
.
views
==
null
)
{
throw
new
Error
(
'Must pass a views parameter when initializing PaneElements'
)
}
if
(
this
.
applicationDelegate
==
null
)
{
throw
new
Error
(
'Must pass an applicationDelegate parameter when initializing PaneElements'
)
}
this
.
subscriptions
.
add
(
this
.
model
.
onDidActivate
(
this
.
activated
.
bind
(
this
)
)
)
this
.
subscriptions
.
add
(
this
.
model
.
observeActive
(
this
.
activeStatusChanged
.
bind
(
this
)
)
)
this
.
subscriptions
.
add
(
this
.
model
.
observeActiveItem
(
this
.
activeItemChanged
.
bind
(
this
)
)
)
this
.
subscriptions
.
add
(
this
.
model
.
onDidRemoveItem
(
this
.
itemRemoved
.
bind
(
this
)
)
)
this
.
subscriptions
.
add
(
this
.
model
.
onDidDestroy
(
this
.
paneDestroyed
.
bind
(
this
)
)
)
this
.
subscriptions
.
add
(
this
.
model
.
observeFlexScale
(
this
.
flexScaleChanged
.
bind
(
this
)
)
)
return
this
}
getModel
(
)
{
return
this
.
model
}
activated
(
)
{
this
.
isActivating
=
true
if
(
!
this
.
hasFocus
(
)
)
{
// Don't steal focus from children.
this
.
focus
(
)
}
this
.
isActivating
=
false
}
activeStatusChanged
(
active
)
{
if
(
active
)
{
this
.
classList
.
add
(
'active'
)
}
else
{
this
.
classList
.
remove
(
'active'
)
}
}
activeItemChanged
(
item
)
{
delete
this
.
dataset
.
activeItemName
delete
this
.
dataset
.
activeItemPath
if
(
this
.
changePathDisposable
!=
null
)
{
this
.
changePathDisposable
.
dispose
(
)
}
if
(
item
==
null
)
{
return
}
const
hasFocus
=
this
.
hasFocus
(
)
const
itemView
=
this
.
views
.
getView
(
item
)
const
itemPath
=
typeof
item
.
getPath
===
'function'
?
item
.
getPath
(
)
:
null
if
(
itemPath
)
{
this
.
dataset
.
activeItemName
=
path
.
basename
(
itemPath
)
this
.
dataset
.
activeItemPath
=
itemPath
if
(
item
.
onDidChangePath
!=
null
)
{
this
.
changePathDisposable
=
item
.
onDidChangePath
(
(
)
=>
{
const
itemPath
=
item
.
getPath
(
)
this
.
dataset
.
activeItemName
=
path
.
basename
(
itemPath
)
this
.
dataset
.
activeItemPath
=
itemPath
}
)
}
}
if
(
!
this
.
itemViews
.
contains
(
itemView
)
)
{
this
.
itemViews
.
appendChild
(
itemView
)
}
for
(
const
child
of
this
.
itemViews
.
children
)
{
if
(
child
===
itemView
)
{
if
(
this
.
attached
)
{
this
.
showItemView
(
child
)
}
}
else
{
this
.
hideItemView
(
child
)
}
}
if
(
hasFocus
)
{
itemView
.
focus
(
)
}
}
showItemView
(
itemView
)
{
const
inlineDisplayStyle
=
this
.
inlineDisplayStyles
.
get
(
itemView
)
if
(
inlineDisplayStyle
!=
null
)
{
itemView
.
style
.
display
=
inlineDisplayStyle
}
else
{
itemView
.
style
.
display
=
''
}
}
hideItemView
(
itemView
)
{
const
inlineDisplayStyle
=
itemView
.
style
.
display
if
(
inlineDisplayStyle
!==
'none'
)
{
if
(
inlineDisplayStyle
!=
null
)
{
this
.
inlineDisplayStyles
.
set
(
itemView
,
inlineDisplayStyle
)
}
itemView
.
style
.
display
=
'none'
}
}
itemRemoved
(
{
item
,
index
,
destroyed
}
)
{
const
viewToRemove
=
this
.
views
.
getView
(
item
)
if
(
viewToRemove
)
{
viewToRemove
.
remove
(
)
}
}
paneDestroyed
(
)
{
this
.
subscriptions
.
dispose
(
)
if
(
this
.
changePathDisposable
!=
null
)
{
this
.
changePathDisposable
.
dispose
(
)
}
}
flexScaleChanged
(
flexScale
)
{
this
.
style
.
flexGrow
=
flexScale
}
getActiveView
(
)
{
return
this
.
views
.
getView
(
this
.
model
.
getActiveItem
(
)
)
}
hasFocus
(
)
{
return
(
this
===
document
.
activeElement
||
this
.
contains
(
document
.
activeElement
)
)
}
}
module
.
exports
=
document
.
registerElement
(
'atom-pane'
,
{
prototype
:
PaneElement
.
prototype
}
)
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