Implements the ability to get and set the caret position and the current selection from anywhere in…

Source/modules/accessibility/AXLayoutObject.h

 /*
  * Copyright (C) 2008 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 25 matching lines @@
 
 namespace blink {
 
 class AXObjectCacheImpl;
 class AXSVGRoot;
 class Element;
 class FrameView;
 class HTMLAreaElement;
 class IntPoint;
 class Node;
-class VisibleSelection;
 class Widget;
 
 class MODULES_EXPORT AXLayoutObject : public AXNodeObject {
 protected:
     AXLayoutObject(LayoutObject*, AXObjectCacheImpl&);
 
 public:
     static PassRefPtrWillBeRawPtr<AXLayoutObject> create(LayoutObject*, AXObjectCacheImpl&);
     ~AXLayoutObject() override;
 
@@ skipping 87 matching lines @@
     const AtomicString& liveRegionRelevant() const override;
     bool liveRegionAtomic() const override;
     bool liveRegionBusy() const override;
 
     // Accessibility Text.
     String deprecatedTextUnderElement(TextUnderElementMode) const override;
 
     // Accessibility Text - (To be deprecated).
     String deprecatedHelpText() const override;
 
+    // Methods that retrieve or manipulate the current selection.
+
+    AXRange selection() const override;
+    AXRange selectionUnderObject() const override;
+    void setSelection(const AXRange&) override;
+
     // Location and click point in frame-relative coordinates.
     void markCachedElementRectDirty() const override;
     IntPoint clickPoint() override;
 
     // Hit testing.
     AXObject* accessibilityHitTest(const IntPoint&) const override;
     AXObject* elementAccessibilityHitTest(const IntPoint&) const override;
 
     // High-level accessibility tree access. Other modules should only use these functions.
     AXObject* computeParent() const override;
@@ skipping 12 matching lines @@
     // Properties of the object's owning document or page.
     double estimatedLoadingProgress() const override;
 
     // DOM and layout tree access.
     Node* node() const override;
     Document* document() const override;
     FrameView* documentFrameView() const override;
     Element* anchorElement() const override;
     Widget* widgetForAttachmentView() const override;
 
-    // Selected text.
-    PlainTextRange selectedTextRange() const override;
-
-    // Modify or take an action on an object.
-    void setSelectedTextRange(const PlainTextRange&) override;
     void setValue(const String&) override;
 
     // Notifications that this object may have changed.
     void handleActiveDescendantChanged() override;
     void handleAriaExpandedChanged() override;
     void textChanged() override;
 
     // Text metrics. Most of these should be deprecated, needs major cleanup.
     int index(const VisiblePosition&) const override;
     VisiblePosition visiblePositionForIndex(int) const override;
     void lineBreaks(Vector<int>&) const override;
 
 private:
     AXObject* treeAncestorDisallowingChild() const;
     void ariaListboxSelectedChildren(AccessibilityChildrenVector&);
-    PlainTextRange visibleSelectionUnderObject() const;
     bool nodeIsTextControl(const Node*) const;
     bool isTabItemSelected() const;
+    bool isValidSelectionBound(const AXObject*) const;
     AXObject* accessibilityImageMapHitTest(HTMLAreaElement*, const IntPoint&) const;
     LayoutObject* layoutParentObject() const;
     bool isSVGImage() const;
     void detachRemoteSVGRoot();
     AXSVGRoot* remoteSVGRootElement() const;
     AXObject* remoteSVGElementHitTest(const IntPoint&) const;
     void offsetBoundingBoxForRemoteSVGElement(LayoutRect&) const;
     void addHiddenChildren();
     void addTextFieldChildren();
     void addImageMapChildren();
     void addCanvasChildren();
     void addAttachmentChildren();
     void addPopupChildren();
     void addRemoteSVGChildren();
     void addInlineTextBoxChildren(bool force);
 
     void ariaSelectedRows(AccessibilityChildrenVector&);
     bool elementAttributeValue(const QualifiedName&) const;
     LayoutRect computeElementRect() const;
-    VisibleSelection selection() const;
+    AXRange textControlSelection() const;
     int indexForVisiblePosition(const VisiblePosition&) const;
 };
 
 DEFINE_AX_OBJECT_TYPE_CASTS(AXLayoutObject, isAXLayoutObject());
 
 } // namespace blink
 
 #endif // AXLayoutObject_h