Revert of Reimplement automation API on top of C++-backed AXTree.

chrome/common/extensions/api/automation.idl

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // The <code>chrome.automation</code> API allows developers to access the
 // automation (accessibility) tree for the browser. The tree resembles the DOM
 // tree, but only exposes the <em>semantic</em> structure of a page. It can be
 // used to programmatically interact with a page by examining names, roles, and
 // states, listening for events, and performing actions on nodes.
 [nocompile] namespace automation {
@@ skipping 299 matching lines @@
   [nocompile, noinline_doc] dictionary AutomationNode {
     // The root node of the tree containing this AutomationNode.
     AutomationNode root;
 
     // Whether this AutomationNode is root node.
     boolean isRootNode;
 
     // The role of this node.
     automation.RoleType role;
 
+    // TODO(aboxhall): expose states as mixins instead
+
     // The $(ref:automation.StateType)s describing this node.
     object state;
 
     // The rendered location (as a bounding box) of this node within the frame.
     automation.Rect location;
 
     // The purpose of the node, other than the role, if any.
     DOMString description;
 
     // The help text for the node, if any.
@@ skipping 30 matching lines @@
     // one. See
     // <a href="http://www.w3.org/TR/wai-aria/states_and_properties#aria-flowto">
     // <code>aria-flowto</code></a>.
     AutomationNode[] flowTo;
 
     // The nodes, if any, which form a label for this element. Generally, the
     // text from these elements will also be exposed as the element's accessible
     // name, via the $(ref:automation.AutomationNode.name) attribute.
     AutomationNode[] labelledBy;
 
-    // The node referred to by <code>aria-activedescendant</code>, where
-    // applicable
-    AutomationNode activedescendant;
+    // The nodes, if any, which are to be considered children of this node but
+    // are not children in the DOM tree.
+    AutomationNode[] owns;
 
-    //
-    // Link attributes.
-    //
+    // TODO(aboxhall): Make this private?
 
-    // The URL that this link will navigate to.
-    DOMString url;
+    // A collection of this node's other attributes.
+    object? attributes;
 
-    //
-    // Document attributes.
-    //
-
-    // The URL of this document.
-    DOMString docUrl;
-
-    // The title of this document.
-    DOMString docTitle;
-
-    // Whether this document has finished loading.
-    boolean docLoaded;
-
-    // The proportion (out of 1.0) that this doc has completed loading.
-    double docLoadingProgress;
-
-    //
-    // Scrollable container attributes.
-    //
-
-    long scrollX;
-    long scrollXMin;
-    long scrollXMax;
-    long scrollY;
-    long scrollYMin;
-    long scrollYMax;
-
-    //
-    // Editable text field attributes.
-    //
-
-    // The character index of the start of the selection within this editable
-    // text element; -1 if no selection.
-    long textSelStart;
-
-    // The character index of the end of the selection within this editable
-    // text element; -1 if no selection.
-    long textSelEnd;
-
-    // The input type, like email or number.
-    DOMString textInputType;
-
-    //
-    // Range attributes.
-    //
-
-    // The current value for this range.
-    double valueForRange;
-
-    // The minimum possible value for this range.
-    double minValueForRange;
-
-    // The maximum possible value for this range.
-    double maxValueForRange;
-
-    //
-    // Table attributes.
-    //
-
-    // The number of rows in this table.
-    long tableRowCount;
-
-    // The number of columns in this table.
-    long tableColumnCount;
-
-    //
-    // Table cell attributes.
-    //
-
-    // The zero-based index of the column that this cell is in.
-    long tableCellColumnIndex;
-
-    // The number of columns that this cell spans (default is 1).
-    long tableCellColumnSpan;
-
-    // The zero-based index of the row that this cell is in.
-    long tableCellRowIndex;
-
-    // The number of rows that this cell spans (default is 1).
-    long tableCellRowSpan;
-
-    //
-    // Walking the tree.
-    //
+    // The index of this node in its parent node's list of children. If this is
+    // the root node, this will be undefined.
+    long? indexInParent;
 
     AutomationNode[] children;
     AutomationNode parent;
     AutomationNode firstChild;
     AutomationNode lastChild;
     AutomationNode previousSibling;
     AutomationNode nextSibling;
 
-    // The index of this node in its parent node's list of children. If this is
-    // the root node, this will be undefined.
-    long? indexInParent;
-
-    //
-    // Actions.
-    //
-
     // Does the default action based on this node's role. This is generally
     // the same action that would result from clicking the node such as
     // expanding a treeitem, toggling a checkbox, selecting a radiobutton,
     // or activating a button.
     static void doDefault();
 
     // Places focus on this node.
     static void focus();
 
     // Scrolls this node to make it visible.
     static void makeVisible();
 
     // Sets selection within a text field.
     static void setSelection(long startIndex, long endIndex);
 
+    // Shows the context menu resulting from a right click on this node.
+    static void showContextMenu();
+
     // Adds a listener for the given event type and event phase.
     static void addEventListener(
         EventType eventType, AutomationListener listener, boolean capture);
 
     // Removes a listener for the given event type and event phase.
     static void removeEventListener(
         EventType eventType, AutomationListener listener, boolean capture);
 
     // Gets the first node in this node's subtree which matches the given CSS
     // selector and is within the same DOM context.
@@ skipping 16 matching lines @@
     static AutomationNode find(FindParams params);
 
     // Finds all the AutomationNodes in this node's subtree which matches the
     // given search parameters.
     static AutomationNode[] findAll(FindParams params);
 
     // Returns whether this node matches the given $(ref:automation.FindParams).
     static boolean matches(FindParams params);
   };
 
+  dictionary ActiveDescendantMixin {
+    // The node referred to by <code>aria-activedescendant</code>, where
+    // applicable
+    AutomationNode activedescendant;
+  };
+
+  // Attributes which are mixed in to an AutomationNode if it is a link.
+  dictionary LinkMixins {
+    // TODO(aboxhall): Add visited state
+
+    // The URL that this link will navigate to.
+    DOMString url;
+  };
+
+  // Attributes which are mixed in to an AutomationNode if it is a document.
+  dictionary DocumentMixins {
+    // The URL of this document.
+    DOMString docUrl;
+
+    // The title of this document.
+    DOMString docTitle;
+
+    // Whether this document has finished loading.
+    boolean docLoaded;
+
+    // The proportion (out of 1.0) that this doc has completed loading.
+    double docLoadingProgress;
+  };
+
+  // TODO(aboxhall): document ScrollableMixins (e.g. what is scrollXMin? is it
+  // ever not 0?)
+
+  // Attributes which are mixed in to an AutomationNode if it is scrollable.
+  dictionary ScrollableMixins {
+    long scrollX;
+    long scrollXMin;
+    long scrollXMax;
+    long scrollY;
+    long scrollYMin;
+    long scrollYMax;
+  };
+
+  // Attributes which are mixed in to an AutomationNode if it is editable text.
+  dictionary EditableTextMixins {
+    // The character index of the start of the selection within this editable
+    // text element; -1 if no selection.
+    long textSelStart;
+
+    // The character index of the end of the selection within this editable
+    // text element; -1 if no selection.
+    long textSelEnd;
+
+    // The input type, like email or number.
+    DOMString textInputType;
+  };
+
+  // Attributes which are mixed in to an AutomationNode if it is a range.
+  dictionary RangeMixins {
+    // The current value for this range.
+    double valueForRange;
+
+    // The minimum possible value for this range.
+    double minValueForRange;
+
+    // The maximum possible value for this range.
+    double maxValueForRange;
+  };
+
+  // TODO(aboxhall): live region mixins.
+
+  // Attributes which are mixed in to an AutomationNode if it is a table.
+  dictionary TableMixins {
+    // The number of rows in this table.
+    long tableRowCount;
+
+    // The number of columns in this table.
+    long tableColumnCount;
+  };
+
+  // Attributes which are mixed in to an AutomationNode if it is a table cell.
+  dictionary TableCellMixins {
+    // The zero-based index of the column that this cell is in.
+    long tableCellColumnIndex;
+
+    // The number of columns that this cell spans (default is 1).
+    long tableCellColumnSpan;
+
+    // The zero-based index of the row that this cell is in.
+    long tableCellRowIndex;
+
+    // The number of rows that this cell spans (default is 1).
+    long tableCellRowSpan;
+  };
+
   // Called when the <code>AutomationNode</code> for the page is available.
   callback RootCallback = void(AutomationNode rootNode);
 
   interface Functions {
     // Get the automation tree for the tab with the given tabId, or the current
     // tab if no tabID is given, enabling automation if necessary. Returns a
     // tree with a placeholder root node; listen for the "loadComplete" event to
     // get a notification that the tree has fully loaded (the previous root node
     // reference will stop working at or before this point).
     [nocompile] static void getTree(optional long tabId, RootCallback callback);
 
     // Get the automation tree for the whole desktop which consists of all on
     // screen views. Note this API is currently only supported on Chrome OS.
     [nocompile] static void getDesktop(RootCallback callback);
 
     // Add a tree change observer. Tree change observers are static/global, they
     // listen to changes across all trees.
     [nocompile] static void addTreeChangeObserver(
         TreeChangeObserver observer);
 
     // Remove a tree change observer.
     [nocompile] static void removeTreeChangeObserver(
         TreeChangeObserver observer);
   };
 };