Support for the new Xwidget feature.

* configure.ac:
(HAVE_XWIDGETS, WIDGET_OBJ, EMACS_CONFIG_FEATURES):
* xterm.c (x_draw_glyph_string, x_draw_bar_cursor):
* xdisp.c:
(handle_display_spec, handle_single_display_spec, push_it)
(pop_it, set_iterator_to_next, dump_glyph)
(calc_pixel_width_or_height, fill_xwidget_glyph_string)
(BUILD_XWIDGET_GLYPH_STRING, BUILD_GLYPH_STRINGS)
(produce_xwidget_glyph, x_produce_glyphs)
(get_window_cursor_type):
* window.c (Fdelete_window_internal):
* termhooks.h (e):
* print.c (print_object):
* lisp.h (ptrdiff_t):
* keyboard.c (kbd_buffer_get_event, make_lispy_event)
(syms_of_keyboard):
* emacs.c (main):
* dispnew.c (update_window, scrolling_window):
* dispextern.h (g, i):
* Makefile.in (XWIDGETS_OBJ, WEBKIT_CFLAGS, WEBKIT_LIBS)
(GIR_LIBS, ALL_CFLAGS, base_obj, LIBES):
* keyboard.c (kbd_buffer_get_event):
* emacsgtkfixed.c (emacs_fixed_gtk_widget_size_allocate)
(emacs_fixed_class_init): Add case for an xwidget view.

* xwidget.c, xwidget.h, xwidget.el: New files for xwidgets

Co-authored-by:  Grégoire Jadi  <daimrod@gmail.com>

Various improvements to the Xwidget feature.
* xwidgets.c:
* emacsgtkfixed.c:
* xwidget.el:

1 files changed, 15 insertions, 0 deletions

diff --git a/etc/NEWS b/etc/NEWS
index 4e415a1039a..db6e51dfd45 100644
--- a/etc/NEWS
+++ b/etc/NEWS
@@ -121,6 +121,21 @@ 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 webkit-devel installed, you
+can access the embedded webkit browser with m-x
+xwidget-webkit-browse-url. This will open a new buffer with the
+embedded browser. The buffer will have a new mode, xwidget-webkit
+mode which is 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',
+`xwidget-webkit-current-url', `xwidget-webkit-scroll-backward',
+`xwidget-webkit-scroll-forward', `xwidget-webkit-scroll-down',
+`xwidget-webkit-scroll-up',
+
++++
 ** Emacs can now load shared/dynamic libraries (modules).
 A dynamic Emacs module is a shared library that provides additional
 functionality for use in Emacs Lisp programs, just like a package