Fix doc warnings for focus code (#62602)

packages/flutter/lib/src/widgets/editable_text.dart

@@ -975,7 +975,7 @@ class EditableText extends StatefulWidget {
   /// {@tool dartpad --template=stateful_widget_material}
   /// When a non-completion action is pressed, such as "next" or "previous", it
   /// is often desirable to move the focus to the next or previous field.  To do
-  /// this, handle it as in this example, by calling [FocusNode.focusNext] in
+  /// this, handle it as in this example, by calling [FocusNode.nextFocus] in
   /// the `onFieldSubmitted` callback of [TextFormField]. ([TextFormField] wraps
   /// [EditableText] internally, and uses the value of `onFieldSubmitted` as its
   /// [onSubmitted]).

packages/flutter/lib/src/widgets/focus_manager.dart

@@ -196,9 +196,9 @@ enum UnfocusDisposition {
 /// receive a notification when the focus changes. If the [Focus] and
 /// [FocusScope] widgets are being used to manage the nodes, consider
 /// establishing an [InheritedWidget] dependency on them by calling [Focus.of]
-/// or [FocusScope.of] instead. [Focus.hasFocus] can also be used to establish a
-/// similar dependency, especially if all that is needed is to determine whether
-/// or not the widget is focused at build time.
+/// or [FocusScope.of] instead. [FocusNode.hasFocus] can also be used to
+/// establish a similar dependency, especially if all that is needed is to
+/// determine whether or not the widget is focused at build time.
 ///
 /// To see the focus tree in the debug console, call [debugDumpFocusTree]. To
 /// get the focus tree as a string, call [debugDescribeFocusTree].
@@ -224,12 +224,12 @@ enum UnfocusDisposition {
 /// [FocusAttachment] object. This attachment is created by calling [attach],
 /// usually from the [State.initState] method. If the hosting widget is updated
 /// to have a different focus node, then the updated node needs to be attached
-/// in [State.didUpdateWidget], after calling [detach] on the previous
-/// [FocusAttachment].
+/// in [State.didUpdateWidget], after calling [FocusAttachment.detach] on the
+/// previous [FocusAttachment].
 ///
-/// Because [FocusNode]s form a sparse representation of the widget tree,
-/// they must be updated whenever the widget tree is rebuilt. This is done by
-/// calling [FocusAttachment.reparent], usually from the [State.build] or
+/// Because [FocusNode]s form a sparse representation of the widget tree, they
+/// must be updated whenever the widget tree is rebuilt. This is done by calling
+/// [FocusAttachment.reparent], usually from the [State.build] or
 /// [State.didChangeDependencies] methods of the widget that represents the
 /// focused region, so that the [BuildContext] assigned to the [FocusScopeNode]
 /// can be tracked (the context is used to obtain the [RenderObject], from which
@@ -241,9 +241,9 @@ enum UnfocusDisposition {
 ///
 /// If, as is common, the hosting [StatefulWidget] is also the owner of the
 /// focus node, then it will also call [dispose] from its [State.dispose] (in
-/// which case the [detach] may be skipped, since dispose will automatically
-/// detach). If another object owns the focus node, then it must call [dispose]
-/// when the node is done being used.
+/// which case the [FocusAttachment.detach] may be skipped, since dispose will
+/// automatically detach). If another object owns the focus node, then it must
+/// call [dispose] when the node is done being used.
 /// {@endtemplate}
 ///
 /// {@template flutter.widgets.focus_manager.focus.keyEvents}
@@ -284,10 +284,10 @@ enum UnfocusDisposition {
 /// [DirectionalFocusTraversalPolicyMixin], but custom policies can be built
 /// based upon these policies. See [FocusTraversalPolicy] for more information.
 ///
-/// {@tool dartpad --template=stateless_widget_scaffold}
-/// This example shows how a FocusNode should be managed if not using the
-/// [Focus] or [FocusScope] widgets. See the [Focus] widget for a similar
-/// example using [Focus] and [FocusScope] widgets.
+/// {@tool dartpad --template=stateless_widget_scaffold} This example shows how
+/// a FocusNode should be managed if not using the [Focus] or [FocusScope]
+/// widgets. See the [Focus] widget for a similar example using [Focus] and
+/// [FocusScope] widgets.
 ///
 /// ```dart imports
 /// import 'package:flutter/services.dart';
@@ -396,14 +396,14 @@ enum UnfocusDisposition {
 ///
 /// See also:
 ///
-///  * [Focus], a widget that manages a [FocusNode] and provides access to
-///    focus information and actions to its descendant widgets.
-///  * [FocusTraversalGroup], a widget used to group together and configure the
-///    focus traversal policy for a widget subtree.
-///  * [FocusManager], a singleton that manages the primary focus and
-///    distributes key events to focused nodes.
-///  * [FocusTraversalPolicy], a class used to determine how to move the focus
-///    to other nodes.
+/// * [Focus], a widget that manages a [FocusNode] and provides access to focus
+///   information and actions to its descendant widgets.
+/// * [FocusTraversalGroup], a widget used to group together and configure the
+///   focus traversal policy for a widget subtree.
+/// * [FocusManager], a singleton that manages the primary focus and distributes
+///   key events to focused nodes.
+/// * [FocusTraversalPolicy], a class used to determine how to move the focus to
+///   other nodes.
 class FocusNode with DiagnosticableTreeMixin, ChangeNotifier {
   /// Creates a focus node.
   ///
@@ -1039,10 +1039,10 @@ class FocusNode with DiagnosticableTreeMixin, ChangeNotifier {
   /// will add the [node] as a child of this node before requesting focus.
   ///
   /// If the given [node] is a [FocusScopeNode] and that focus scope node has a
-  /// non-null [focusedChild], then request the focus for the focused child.
-  /// This process is recursive and continues until it encounters either a focus
-  /// scope node with a null focused child or an ordinary (non-scope)
-  /// [FocusNode] is found.
+  /// non-null [FocusScopeNode.focusedChild], then request the focus for the
+  /// focused child. This process is recursive and continues until it encounters
+  /// either a focus scope node with a null focused child or an ordinary
+  /// (non-scope) [FocusNode] is found.
   ///
   /// The node is notified that it has received the primary focus in a
   /// microtask, so notification may lag the request by up to one frame.

packages/flutter/lib/src/widgets/focus_scope.dart

@@ -29,7 +29,7 @@ import 'inherited_notifier.dart';
 /// changes, use the [Focus.of] and [FocusScope.of] static methods.
 ///
 /// To access the focused state of the nearest [Focus] widget, use
-/// [Focus.hasFocus] from a build method, which also establishes a relationship
+/// [FocusNode.hasFocus] from a build method, which also establishes a relationship
 /// between the calling widget and the [Focus] widget that will rebuild the
 /// calling widget when the focus changes.
 ///
@@ -364,16 +364,17 @@ class Focus extends StatefulWidget {
   /// This is sometimes useful if a [Focus] widget should receive key events as
   /// part of the focus chain, but shouldn't be accessible via focus traversal.
   ///
-  /// This is different from [canRequestFocus] because it only implies that the
-  /// widget can't be reached via traversal, not that it can't be focused. It may
-  /// still be focused explicitly.
+  /// This is different from [FocusNode.canRequestFocus] because it only implies
+  /// that the widget can't be reached via traversal, not that it can't be
+  /// focused. It may still be focused explicitly.
   final bool skipTraversal;
 
   /// {@template flutter.widgets.Focus.includeSemantics}
   /// Include semantics information in this widget.
   ///
-  /// If true, this widget will include a [Semantics] node that
-  /// indicates the [Semantics.focusable] and [Semantics.focused] properties.
+  /// If true, this widget will include a [Semantics] node that indicates the
+  /// [SemanticsProperties.focusable] and [SemanticsProperties.focused]
+  /// properties.
   ///
   /// It is not typical to set this to false, as that can affect the semantics
   /// information available to accessibility systems.
@@ -386,22 +387,22 @@ class Focus extends StatefulWidget {
   /// If true, this widget may request the primary focus.
   ///
   /// Defaults to true.  Set to false if you want the [FocusNode] this widget
-  /// manages to do nothing when [requestFocus] is called on it. Does not affect
-  /// the children of this node, and [FocusNode.hasFocus] can still return true
-  /// if this node is the ancestor of the primary focus.
+  /// manages to do nothing when [FocusNode.requestFocus] is called on it. Does
+  /// not affect the children of this node, and [FocusNode.hasFocus] can still
+  /// return true if this node is the ancestor of the primary focus.
   ///
-  /// This is different than [skipTraversal] because [skipTraversal] still
-  /// allows the widget to be focused, just not traversed to.
+  /// This is different than [Focus.skipTraversal] because [Focus.skipTraversal]
+  /// still allows the widget to be focused, just not traversed to.
   ///
-  /// Setting [canRequestFocus] to false implies that the widget will also be
-  /// skipped for traversal purposes.
+  /// Setting [FocusNode.canRequestFocus] to false implies that the widget will
+  /// also be skipped for traversal purposes.
   ///
   /// See also:
   ///
-  ///  * [FocusTraversalGroup], a widget that sets the traversal policy for
-  ///    its descendants.
-  ///  * [FocusTraversalPolicy], a class that can be extended to describe a
-  ///    traversal policy.
+  /// * [FocusTraversalGroup], a widget that sets the traversal policy for its
+  ///   descendants.
+  /// * [FocusTraversalPolicy], a class that can be extended to describe a
+  ///   traversal policy.
   /// {@endtemplate}
   final bool canRequestFocus;
 
@@ -409,22 +410,23 @@ class Focus extends StatefulWidget {
   /// If false, will make this widget's descendants unfocusable.
   ///
   /// Defaults to true. Does not affect focusability of this node (just its
-  /// descendants): for that, use [canRequestFocus].
+  /// descendants): for that, use [FocusNode.canRequestFocus].
   ///
   /// If any descendants are focused when this is set to false, they will be
   /// unfocused. When `descendantsAreFocusable` is set to true again, they will
   /// not be refocused, although they will be able to accept focus again.
   ///
-  /// Does not affect the value of [canRequestFocus] on the descendants.
+  /// Does not affect the value of [FocusNode.canRequestFocus] on the
+  /// descendants.
   ///
   /// See also:
   ///
-  ///  * [ExcludeFocus], a widget that uses this property to conditionally
-  ///    exclude focus for a subtree.
-  ///  * [FocusTraversalGroup], a widget used to group together and configure
-  ///    the focus traversal policy for a widget subtree that has a
-  ///    `descendantsAreFocusable` parameter to conditionally block focus for a
-  ///    subtree.
+  /// * [ExcludeFocus], a widget that uses this property to conditionally
+  ///   exclude focus for a subtree.
+  /// * [FocusTraversalGroup], a widget used to group together and configure the
+  ///   focus traversal policy for a widget subtree that has a
+  ///   `descendantsAreFocusable` parameter to conditionally block focus for a
+  ///   subtree.
   /// {@endtemplate}
   final bool descendantsAreFocusable;
 
@@ -870,7 +872,7 @@ class FocusScope extends Focus {
   ///
   /// The [child] argument is required and must not be null.
   ///
-  /// The [autofocus], and [showDecorations] arguments must not be null.
+  /// The [autofocus] argument must not be null.
   const FocusScope({
     Key key,
     FocusScopeNode node,
@@ -979,16 +981,17 @@ class ExcludeFocus extends StatelessWidget {
   /// unfocused. When `excluding` is set to false again, they will not be
   /// refocused, although they will be able to accept focus again.
   ///
-  /// Does not affect the value of [canRequestFocus] on the descendants.
+  /// Does not affect the value of [FocusNode.canRequestFocus] on the
+  /// descendants.
   ///
   /// See also:
   ///
-  ///  * [Focus.descendantsAreFocusable], the attribute of a [Focus] widget that
-  ///    controls this same property for focus widgets.
-  ///  * [FocusTraversalGroup], a widget used to group together and configure
-  ///    the focus traversal policy for a widget subtree that has a
-  ///    `descendantsAreFocusable` parameter to conditionally block focus for a
-  ///    subtree.
+  /// * [Focus.descendantsAreFocusable], the attribute of a [Focus] widget that
+  ///   controls this same property for focus widgets.
+  /// * [FocusTraversalGroup], a widget used to group together and configure the
+  ///   focus traversal policy for a widget subtree that has a
+  ///   `descendantsAreFocusable` parameter to conditionally block focus for a
+  ///   subtree.
   final bool excluding;
 
   /// The child widget of this [ExcludeFocus].

packages/flutter/lib/src/widgets/focus_traversal.dart

@@ -64,8 +64,8 @@ class _FocusTraversalGroupInfo {
 /// A direction along either the horizontal or vertical axes.
 ///
 /// This is used by the [DirectionalFocusTraversalPolicyMixin], and
-/// [Focus.focusInDirection] to indicate which direction to look in for the next
-/// focus.
+/// [FocusNode.focusInDirection] to indicate which direction to look in for the
+/// next focus.
 enum TraversalDirection {
   /// Indicates a direction above the currently focused widget.
   up,
@@ -433,7 +433,7 @@ class _DirectionalPolicyData {
 ///
 /// Since hysteresis in the navigation order is undesirable, this implementation
 /// maintains a stack of previous locations that have been visited on the
-/// [policyData] for the affected [FocusScopeNode]. If the previous direction
+/// policy data for the affected [FocusScopeNode]. If the previous direction
 /// was the opposite of the current direction, then the this policy will request
 /// focus on the previously focused node. Change to another direction other than
 /// the current one or its opposite will clear the stack.
@@ -682,7 +682,7 @@ mixin DirectionalFocusTraversalPolicyMixin on FocusTraversalPolicy {
   /// Returns true if it successfully found a node and requested focus.
   ///
   /// Maintains a stack of previous locations that have been visited on the
-  /// [policyData] for the affected [FocusScopeNode]. If the previous direction
+  /// policy data for the affected [FocusScopeNode]. If the previous direction
   /// was the opposite of the current direction, then the this policy will
   /// request focus on the previously focused node. Change to another direction
   /// other than the current one or its opposite will clear the stack.
@@ -1122,25 +1122,26 @@ class ReadingOrderTraversalPolicy extends FocusTraversalPolicy with DirectionalF
 ///
 /// {@template flutter.widgets.focusorder.comparable}
 /// Only orders of the same type are comparable. If a set of widgets in the same
-/// [FocusTraversalGroup] contains orders that are not comparable with each other, it
-/// will assert, since the ordering between such keys is undefined. To avoid
-/// collisions, use a [FocusTraversalGroup] to group similarly ordered widgets
-/// together.
-///
-/// When overriding, [doCompare] must be overridden instead of [compareTo],
-/// which calls [doCompare] to do the actual comparison.
+/// [FocusTraversalGroup] contains orders that are not comparable with each
+/// other, it will assert, since the ordering between such keys is undefined. To
+/// avoid collisions, use a [FocusTraversalGroup] to group similarly ordered
+/// widgets together.
+///
+/// When overriding, [FocusOrder.doCompare] must be overridden instead of
+/// [FocusOrder.compareTo], which calls [FocusOrder.doCompare] to do the actual
+/// comparison.
 /// {@endtemplate}
 ///
 /// See also:
 ///
-///  * [FocusTraversalGroup], a widget that groups together and imposes a
-///    traversal policy on the [Focus] nodes below it in the widget hierarchy.
-///  * [FocusTraversalOrder], a widget that assigns an order to a widget subtree
-///    for the [OrderedTraversalPolicy] to use.
-///  * [NumericFocusOrder], for a focus order that describes its order with a
-///    `double`.
-///  * [LexicalFocusOrder], a focus order that assigns a string-based lexical
-///    traversal order to a [FocusTraversalOrder] widget.
+/// * [FocusTraversalGroup], a widget that groups together and imposes a
+///   traversal policy on the [Focus] nodes below it in the widget hierarchy.
+/// * [FocusTraversalOrder], a widget that assigns an order to a widget subtree
+///   for the [OrderedTraversalPolicy] to use.
+/// * [NumericFocusOrder], for a focus order that describes its order with a
+///   `double`.
+/// * [LexicalFocusOrder], a focus order that assigns a string-based lexical
+///   traversal order to a [FocusTraversalOrder] widget.
 @immutable
 abstract class FocusOrder with Diagnosticable implements Comparable<FocusOrder> {
   /// Abstract const constructor. This constructor enables subclasses to provide