Backed out changeset a5ff95602119 (bug 1905021) as requested for caus…

…ing accessibility crashes related to selection a=backout

UltraBlame original commit: 48a7ce6fe0888f9be96810dcf74829c995f29764

accessible/base/SelectionManager.cpp

@@ -1228,17 +1228,6 @@ mCaretOffset
 1
 )
 {
-TextLeafPoint
-caret
-=
-TextLeafPoint
-:
-:
-GetCaret
-(
-caretCntr
-)
-;
 RefPtr
 <
 AccCaretMoveEvent
@@ -1256,9 +1245,12 @@ selection
 IsCollapsed
 (
 )
-caret
-.
-mIsEndOfLineInsertionPoint
+caretCntr
+-
+>
+IsCaretAtEndOfLine
+(
+)
 event
 -
 >

accessible/base/TextLeafRange.cpp

@@ -7285,6 +7285,16 @@ Accessible
 aAcc
 )
 {
+HyperTextAccessibleBase
+*
+ht
+;
+int32_t
+htOffset
+;
+bool
+isEndOfLine
+;
 if
 (
 LocalAccessible
@@ -7337,8 +7347,6 @@ caret
 events
 )
 .
-HyperTextAccessible
-*
 ht
 =
 HyperTextFor
@@ -7358,7 +7366,6 @@ TextLeafPoint
 )
 ;
 }
-int32_t
 htOffset
 =
 ht
@@ -7383,198 +7390,55 @@ TextLeafPoint
 )
 ;
 }
-TextLeafPoint
-point
-=
-ht
--
->
-ToTextLeafPoint
-(
-htOffset
-)
-;
-nsIFrame
-*
-frame
-=
-ht
--
->
-GetFrame
-(
-)
-;
-RefPtr
-<
-nsFrameSelection
->
-sel
-=
-frame
-?
-frame
--
->
-GetFrameSelection
-(
-)
-:
-nullptr
-;
-if
-(
-sel
-&
-&
-sel
--
->
-GetHint
-(
-)
-=
-=
-CaretAssociationHint
-:
-:
-Before
-)
-{
 /
 /
-CaretAssociationHint
+Use
+HyperTextAccessible
 :
 :
-Before
-can
-mean
-that
-the
-caret
-is
-at
-the
-end
-of
+IsCaretAtEndOfLine
+.
+Eventually
+we
+'
+ll
+want
+to
 /
 /
-a
-line
-.
-However
-it
-can
-also
-mean
+move
 that
-the
-caret
-is
-before
-the
-start
+code
+into
+TextLeafPoint
+but
+existing
+code
+depends
+on
+it
+living
 /
 /
-of
-a
-node
 in
-the
-middle
-of
-a
-line
-.
-This
-happens
-when
-moving
-the
-cursor
-/
-/
-forward
-to
-a
-new
-node
-.
-if
+HyperTextAccessible
 (
-point
-.
-mOffset
-=
-=
-0
-)
-{
-/
-/
-The
-caret
-is
-before
-the
-start
-of
-a
-node
-.
-The
+including
 caret
-is
-at
-the
-end
-of
-a
-/
-/
-line
-if
-the
-node
-is
-at
-the
-start
-of
-a
-line
-but
-not
-at
-the
-start
-of
-a
-/
-/
-paragraph
-.
-point
+events
+)
 .
-mIsEndOfLineInsertionPoint
+isEndOfLine
 =
-IsLocalAccAtLineStart
-(
-point
-.
-mAcc
+localAcc
 -
 >
-AsLocal
+AsHyperText
 (
 )
-)
-&
-&
-!
-point
-.
-IsParagraphStart
+-
+>
+IsCaretAtEndOfLine
 (
 )
 ;
@@ -7583,40 +7447,6 @@ else
 {
 /
 /
-This
-isn
-'
-t
-the
-start
-of
-a
-node
-so
-we
-must
-be
-at
-the
-end
-of
-a
-line
-.
-point
-.
-mIsEndOfLineInsertionPoint
-=
-true
-;
-}
-}
-return
-point
-;
-}
-/
-/
 Ideally
 we
 '
@@ -7655,11 +7485,14 @@ Document
 (
 )
 ;
-auto
-[
+std
+:
+:
+tie
+(
 ht
 htOffset
-]
+)
 =
 remoteDoc
 -
@@ -7680,6 +7513,16 @@ TextLeafPoint
 )
 ;
 }
+isEndOfLine
+=
+remoteDoc
+-
+>
+IsCaretAtEndOfLine
+(
+)
+;
+}
 TextLeafPoint
 point
 =
@@ -7695,12 +7538,7 @@ point
 .
 mIsEndOfLineInsertionPoint
 =
-remoteDoc
--
->
-IsCaretAtEndOfLine
-(
-)
+isEndOfLine
 ;
 return
 point