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atom/src/scope-descriptor.js at master · torwei/atom · GitHub
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scope-descriptor.js
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scope-descriptor.js
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// Extended: Wraps an {Array} of `String`s. The Array describes a path from the
// root of the syntax tree to a token including _all_ scope names for the entire
// path.
//
// Methods that take a `ScopeDescriptor` will also accept an {Array} of {String}
// scope names e.g. `['.source.js']`.
//
// You can use `ScopeDescriptor`s to get language-specific config settings via
// {Config::get}.
//
// You should not need to create a `ScopeDescriptor` directly.
//
// * {TextEditor::getRootScopeDescriptor} to get the language's descriptor.
// * {TextEditor::scopeDescriptorForBufferPosition} to get the descriptor at a
// specific position in the buffer.
// * {Cursor::getScopeDescriptor} to get a cursor's descriptor based on position.
//
// See the [scopes and scope descriptor guide](http://flight-manual.atom.io/behind-atom/sections/scoped-settings-scopes-and-scope-descriptors/)
// for more information.
module
.
exports
=
class
ScopeDescriptor
{
static
fromObject
(
scopes
)
{
if
(
scopes
instanceof
ScopeDescriptor
)
{
return
scopes
;
}
else
{
return
new
ScopeDescriptor
(
{
scopes
}
)
;
}
}
/*
Section: Construction and Destruction
*/
// Public: Create a {ScopeDescriptor} object.
//
// * `object` {Object}
// * `scopes` {Array} of {String}s
constructor
(
{
scopes
}
)
{
this
.
scopes
=
scopes
;
}
// Public: Returns an {Array} of {String}s
getScopesArray
(
)
{
return
this
.
scopes
;
}
getScopeChain
(
)
{
// For backward compatibility, prefix TextMate-style scope names with
// leading dots (e.g. 'source.js' -> '.source.js').
if
(
this
.
scopes
[
0
]
!=
null
&&
this
.
scopes
[
0
]
.
includes
(
'.'
)
)
{
let
result
=
''
;
for
(
let
i
=
0
;
i
<
this
.
scopes
.
length
;
i
++
)
{
const
scope
=
this
.
scopes
[
i
]
;
if
(
i
>
0
)
{
result
+=
' '
;
}
if
(
scope
[
0
]
!==
'.'
)
{
result
+=
'.'
;
}
result
+=
scope
;
}
return
result
;
}
else
{
return
this
.
scopes
.
join
(
' '
)
;
}
}
toString
(
)
{
return
this
.
getScopeChain
(
)
;
}
isEqual
(
other
)
{
if
(
this
.
scopes
.
length
!==
other
.
scopes
.
length
)
{
return
false
;
}
for
(
let
i
=
0
;
i
<
this
.
scopes
.
length
;
i
++
)
{
const
scope
=
this
.
scopes
[
i
]
;
if
(
scope
!==
other
.
scopes
[
i
]
)
{
return
false
;
}
}
return
true
;
}
}
;
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