Add a endpoint for creating a new window.

This adds an endpoint at /session/<session id>/window/new that opens a
new top-level browsing context. This takes a single parameter "type"
that is used as a hint as to the kind of window to create within the
application. The return value includes the handle of the new window and
the type of the window that was created.

Author: jgraham

index.html

@@ -759,6 +759,12 @@ <h3>Endpoints</h3>
   <td><a>Get Window Handles</a></td>
  </tr>
 
+ <tr>
+  <td>POST</td>
+  <td>/session/{<var>session id</var>}/window/new</td>
+  <td><a>Create Window</a></td>
+ </tr>
+
  <tr>
   <td>POST</td>
   <td>/session/{<var>session id</var>}/frame</td>
@@ -3230,6 +3236,76 @@ <h3><dfn>Get Window Handles</dfn></h3>
 </aside>
 </section> <!-- /Get Window Handles -->
 
+<section>
+<h3><dfn>Create Window</dfn></h3>
+
+<table class="simple jsoncommand">
+ <tr>
+  <th>HTTP Method</th>
+  <th>URI Template</th>
+ </tr>
+ <tr>
+  <td>GET</td>
+  <td>/session/{<var>session id</var>}/window/new</td>
+ </tr>
+</table>
+
+<p>Create a new <a>top-level browsing context</a>.
+
+<p>The <a>remote end steps</a> are:
+
+<ol>
+ <li><p>If the implementation does not support creating new top-level
+  browsing contexts, return <a>error</a> with <a>error code</a>
+  <a>unsupported operation</a>.
+
+ <li><p>If the <a>current top-level browsing context</a> is <a>no longer open</a>,
+  return <a>error</a> with <a>error code</a> <a>no such window</a>.
+
+ <li><p><a>Handle any user prompts</a> and return its value if it is an <a>error</a>.
+
+ <li><p>Let <var>type hint</var> be the result of <a>getting the property</a>
+  "<code>type</code>" from the <var>parameters</var> argument.
+
+ <li><p>Create a new <a>top-level browsing context</a> by running
+  the <a>window open steps</a> with <var>url</var> set to
+  "<code>about:blank</code>", <var>target</var> set to the empty
+  string, and <var>features</var> set to "<code>noopener</code>" and
+  the user agent configured to create a new browing context. This must
+  be done without invoking the <a>focusing steps</a> for the created browsing
+  context. If <var>type hint</var> has the value "<code>tab</code>",
+  and the implementation supports multiple browsing context in the
+  same OS window, the new browsing context should share an OS window
+  with the <a>current browsing context</a>. If <var>type hint</var> is
+  "<code>window</code>", and the implementation supports multiple
+  browsing contexts in seperate OS windows, the created browsing
+  context should be in a new OS window. In all other cases the details
+  of how the browsing context is presented to the user are
+  implementation defined.
+
+ <li><p>Let <var>handle</var> be the
+  associated <a>window handle</a> of the newly created window.
+
+ <li><p>Let <var>type</var> be "<code>tab</code>" if the newly created
+  window shares an OS-level window with the <a>current browsing
+  context</a>, or "<code>window</code>" otherwise.
+
+ <li><p>Let <var>result</var> be a new JSON <a>Object</a> initialised with:
+
+ <dl>
+  <dt>"<code>handle</code>"
+  <dd>The value of <var>handle</var>.
+
+  <dt>"<code>type</code>"
+  <dd>The value of <var>type</var>.
+
+ </dl>
+
+ <li><p>Return <a>success</a> with data <var>result</var>.
+</ol>
+
+</section> <!-- /Create Window -->
+
 <section>
 <h3><dfn>Switch To Frame</dfn></h3>
 
@@ -9384,6 +9460,7 @@ <h2>Index</h2>
    <!-- Value mode flag --> <li><dfn><a href=https://html.spec.whatwg.org/#concept-output-mode>Value mode flag</a></dfn>
    <!-- Value sanitization algorithm --> <li><dfn><a href=https://html.spec.whatwg.org/#value-sanitization-algorithm>Value sanitization algorithm</a></dfn>
    <!-- Window object --> <li><dfn><a href=https://html.spec.whatwg.org/#the-window-object><code>Window</code></a></dfn> object
+   <!-- Window open steps --> <li><dfn><a href=https://html.spec.whatwg.org/#window-open-steps>Window open steps</a></dfn>
    <!-- WindowProxy exotic object --> <li><dfn><a href=https://html.spec.whatwg.org/#windowproxy><code>WindowProxy</code></a></dfn> exotic object
    <!-- WorkerNavigator --> <li><dfn data-lt="workernavigator"><a href=https://html.spec.whatwg.org/#workernavigator>WorkerNavigator object</a></dfn>
    <!-- setSelectionRange --> <li><dfn data-lt="set selection range"><a href=https://html.spec.whatwg.org/#dom-textarea/input-setselectionrange><code>setSelectionRange</code></a></dfn>