KT-759 Filter keywords auto completion according to context

idea/testData/completion/keywords/AfterSpaceAndDot.kt

@@ -3,4 +3,4 @@ fun foo() {
     str.     <caret>
 }
 
-// ABSENT: public, val, in
+// ABSENT: public, val, in, if, when, this

idea/testData/completion/keywords/InClassScope.kt

@@ -0,0 +1,54 @@
+class TestClass {
+    <caret>
+}
+
+// EXIST:  abstract
+// ABSENT: annotation
+// ABSENT: as
+// ABSENT: break
+// ABSENT: by
+// ABSENT: catch
+// EXIST:  class
+// ABSENT: continue
+// ABSENT: default
+// ABSENT: do
+// ABSENT: else
+// EXIST:  enum
+// ABSENT: false
+// EXIST:  final
+// ABSENT: finally
+// ABSENT: for
+// EXIST:  fun
+// EXIST:  get
+// ABSENT: if
+// ABSENT: import
+// ABSENT: in
+// EXIST:  inline
+// EXIST:  internal
+// ABSENT: is
+// ABSENT: null
+// ABSENT: object
+// EXIST:  open
+// ABSENT: out
+// EXIST:  override
+// ABSENT: package
+// EXIST:  private
+// EXIST:  protected
+// EXIST:  public
+// ABSENT: ref
+// ABSENT: return
+// EXIST:  set
+// ABSENT: super
+// ABSENT: This
+// ABSENT: this
+// ABSENT: throw
+// EXIST:  trait
+// ABSENT: true
+// ABSENT: try
+// EXIST:  type
+// EXIST:  val
+// EXIST:  var
+// ABSENT: vararg
+// ABSENT: when
+// ABSENT: where
+// ABSENT: while

idea/testData/completion/keywords/InFunctionScope.kt

@@ -2,4 +2,53 @@ fun foo() {
     <caret>
 }
 
-// EXIST: val, var
+// ABSENT: abstract
+// ??ABSENT: annotation // java annotation namespace
+// EXIST: as
+// EXIST: break
+// EXIST: by
+// EXIST: catch
+// EXIST: class
+// EXIST: continue
+// EXIST: default
+// EXIST: do
+// EXIST: else
+// EXIST: enum
+// EXIST: false
+// ABSENT: final
+// EXIST: finally
+// EXIST: for
+// EXIST: fun
+// EXIST: get
+// EXIST: if
+// ABSENT: import
+// EXIST: in
+// EXIST: inline
+// EXIST: internal
+// EXIST: is
+// EXIST: null
+// EXIST: object
+// ABSENT: open
+// ABSENT: out
+// ABSENT: override
+// ABSENT: package
+// EXIST: private
+// EXIST: protected
+// EXIST: public
+// EXIST: ref
+// EXIST: return
+// EXIST: set
+// EXIST: super
+// EXIST: This
+// EXIST: this
+// EXIST: throw
+// EXIST: trait
+// EXIST: true
+// EXIST: try
+// EXIST: type
+// EXIST: val
+// EXIST: var
+// EXIST: vararg
+// EXIST: when
+// EXIST: where
+// EXIST: while

idea/testData/completion/keywords/InParametersList.kt

@@ -0,0 +1,54 @@
+fun test(<caret>) {
+
+}
+
+// ABSENT: abstract
+// ABSENT: annotation
+// ABSENT: as
+// ABSENT: break
+// ABSENT: by
+// ABSENT: catch
+// ABSENT: class
+// ABSENT: continue
+// ABSENT: default
+// ABSENT: do
+// ABSENT: else
+// ABSENT: enum
+// ABSENT: false
+// ABSENT: final
+// ABSENT: finally
+// ABSENT: for
+// ABSENT: fun
+// ABSENT: get
+// ABSENT: if
+// ABSENT: import
+// ABSENT: in
+// ABSENT: inline
+// ABSENT: internal
+// ABSENT: is
+// ABSENT: null
+// ABSENT: object
+// ABSENT: open
+// EXIST:  out
+// ABSENT: override
+// ABSENT: package
+// ABSENT: private
+// ABSENT: protected
+// ABSENT: public
+// EXIST:  ref
+// ABSENT: return
+// ABSENT: set
+// ABSENT: super
+// ABSENT: This
+// ABSENT: this
+// ABSENT: throw
+// ABSENT: trait
+// ABSENT: true
+// ABSENT: try
+// ABSENT: type
+// ABSENT: val
+// ABSENT: var
+// ABSENT: vararg
+// ABSENT: when
+// ABSENT: where
+// ABSENT: while

idea/testData/completion/keywords/InTopProperty.kt

@@ -0,0 +1,8 @@
+var a : Int = <caret>
+
+// EXIST:  else
+// EXIST:  false
+// EXIST:  if
+// EXIST:  null
+// EXIST:  this
+// EXIST:  true

idea/testData/completion/keywords/InTypeScope.kt

@@ -2,5 +2,53 @@ fun foo() {
     val test : <caret>
 }
 
-// TODO: Move all keywords to absent
-// EXIST: fun, val, var, namespace
+// ABSENT: abstract
+// ??ABSENT: annotation // java annotation namespace
+// EXIST: as
+// EXIST: break
+// EXIST: by
+// EXIST: catch
+// EXIST: class
+// EXIST: continue
+// EXIST: default
+// EXIST: do
+// EXIST: else
+// EXIST: enum
+// EXIST: false
+// ABSENT: final
+// EXIST: finally
+// EXIST: for
+// EXIST: fun
+// EXIST: get
+// EXIST: if
+// ABSENT: import
+// EXIST: in
+// EXIST: inline
+// EXIST: internal
+// EXIST: is
+// EXIST: null
+// EXIST: object
+// ABSENT: open
+// ABSENT: out
+// ABSENT: override
+// ABSENT: package
+// EXIST: private
+// EXIST: protected
+// EXIST: public
+// EXIST: ref
+// EXIST: return
+// EXIST: set
+// EXIST: super
+// EXIST: This
+// EXIST: this
+// EXIST: throw
+// EXIST: trait
+// EXIST: true
+// EXIST: try
+// EXIST: type
+// EXIST: val
+// EXIST: var
+// EXIST: vararg
+// EXIST: when
+// EXIST: where
+// EXIST: while

idea/testData/completion/keywords/TopScope.kt

@@ -1,8 +1,52 @@
 <caret>
 
-// EXIST: namespace, as, type, class, this, super, val, var, fun, for, null, true
-// EXIST: false, is, in, throw, return, break, continue, object, if, try, else, while
-// EXIST: do, when, trait, This
-// EXIST: import, where, by, get, set, abstract, enum, open, annotation, override, private
-// EXIST: public, internal, protected, catch, out, vararg, inline, finally, final, ref
-// ABSENT: ?in, new, extends, implements
+// EXIST:  abstract
+// ABSENT: annotation
+// ABSENT: as
+// ABSENT: break
+// ABSENT: by
+// ABSENT: catch
+// EXIST:  class
+// ABSENT: continue
+// ABSENT: default
+// ABSENT: do
+// ABSENT: else
+// EXIST:  enum
+// ABSENT: false
+// EXIST:  final
+// ABSENT: finally
+// ABSENT: for
+// EXIST:  fun
+// EXIST:  get
+// ABSENT: if
+// EXIST:  import
+// ABSENT: in
+// EXIST:  inline
+// EXIST:  internal
+// ABSENT: is
+// ABSENT: null
+// ABSENT: object
+// EXIST:  open
+// ABSENT: out
+// ABSENT: override
+// EXIST:  package
+// EXIST:  private
+// EXIST:  protected
+// EXIST:  public
+// ABSENT: ref
+// ABSENT: return
+// EXIST:  set
+// ABSENT: super
+// ABSENT: This
+// ABSENT: this
+// ABSENT: throw
+// EXIST:  trait
+// ABSENT: true
+// ABSENT: try
+// EXIST:  type
+// EXIST:  val
+// EXIST:  var
+// ABSENT: vararg
+// ABSENT: when
+// ABSENT: where
+// ABSENT: while