Document xwidget commands and functions

* doc/lispref/display.texi (Xwidgets): New section, describes some
of the xwidget primitives.
* doc/lispref/display.texi (Display): Update the chapter menu.
* doc/emacs/misc.texi (Embedded WebKit Widgets): New section.
* doc/emacs/emacs.texi (Top): Update the master menu to include
the xwidget node.

1 files changed, 7 insertions, 5 deletions

diff --git a/etc/NEWS b/etc/NEWS
index 09bced4b000..af2dee931f3 100644
--- a/etc/NEWS
+++ b/etc/NEWS
@@ -126,13 +126,15 @@ and can contain escape sequences for command keys, quotes, and the like.
 
 * Changes in Emacs 25.1
 
++++
 ** Xwidgets: a new feature for embedding native widgets inside Emacs buffers.
-If you have gtk3 and webkitgtk3 installed, you can access the
-embedded webkit browser with `M-x xwidget-webkit-browse-url'.  This
-opens a new buffer with the embedded browser.  The buffer will
-have a new mode, `xwidget-webkit-mode' (similar to `image-mode'),
-which supports the webkit widget.
+If you have gtk3 and webkitgtk3 installed, and Emacs was built with
+xwidget support, you can access the embedded webkit browser with `M-x
+xwidget-webkit-browse-url'.  This opens a new buffer with the embedded
+browser.  The buffer will have a new mode, `xwidget-webkit-mode'
+(similar to `image-mode'), which supports the webkit widget.
 
++++
 *** New functions for xwidget-webkit mode `xwidget-webkit-insert-string',
 `xwidget-webkit-adjust-size-dispatch', `xwidget-webkit-back',
 `xwidget-webkit-browse-url', `xwidget-webkit-reload',