Add xwidget support for macOS

Co-authored-by: Jaesup Kwak <veshboo@gmail.com>

* configure.ac: Allow '--with-xwidgets' for "${NS_IMPL_COCOA}".
* etc/NEWS: Mention new feature.
* etc/TODO: Remove done TODO to implement xwidget in NeXTstep port.
* lisp/xwidget.el (xwidget-webkit-clone-and-split-below)
(xwidget-webkit-clone-and-split-right): New procedures.
(xwidget-webkit-callback): Remove call to
'xwidget-webkit-adjust-size-to-window' as adjusting xwidget size is
handled in 'x_draw_xwidget_glyph_string'.
(xwidget-webkit-enable-plugins): New variable.
* nextstep/templates/Info.plist.in: Add 'NSAppTransportSecurity'.
* src/Makefile.in: Add nsxwidget.o for compilation.
* src/emacs.c (main): Move conditional call to 'syms_of_xwidget'.
* src/nsterm.m (ns_draw_glyph_string): Add case for 'XWIDGET_GLYPH'.
(note_mouse_movement mouseMoved): Make it easy to resize window by
dragging mode-line or vertical separator adjacent to large glyph.
* src/nsxwidget.h src/nsxwidget.m: Newly added files, xwidget webkit
backend for macOS Cocoa.
* src/xwidget.c (Fmake_xwidget, xwidget_init_view)
(x_draw_xwidget_glyph_string, xwidget_is_web_view)
(Fxwidget_webkit_goto_uri, Fxwidget_webkit_zoom, Fxwidget_resize)
(Fxwidget_size_request, Fdelete_xwidget_view, xwidget_end_redisplay)
(kill_buffer_xwidgets): Add macOS Cocoa specific functions and code
with 'NS_IMPL_COCOA' and guard GTK specific functions and code with
'USE_GTK'.
(x_draw_xwidget_glyph_string): Handle adjusting xwidget size.
* src/xwidget.h (xwidget, xwidget_view): Add macOS Cocoa specific
fields with 'NS_IMPL_COCOA' and guard GTK specific fields with
USE_GTK.

1 files changed, 77 insertions, 0 deletions

diff --git a/src/nsxwidget.h b/src/nsxwidget.h
new file mode 100644
index 00000000000..7e2a3e0c402
--- /dev/null
+++ b/src/nsxwidget.h
@@ -0,0 +1,77 @@
+/* Header for NS Cocoa part of xwidget and webkit widget.
+
+Copyright (C) 2019 Free Software Foundation, Inc.
+
+This file is part of GNU Emacs.
+
+GNU Emacs is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or (at
+your option) any later version.
+
+GNU Emacs is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
+
+#ifndef NSXWIDGET_H_INCLUDED
+#define NSXWIDGET_H_INCLUDED
+
+/* This file can be included from non-objc files through 'xwidget.h'.  */
+#ifdef __OBJC__
+#import <AppKit/NSView.h>
+#endif
+
+#include "dispextern.h"
+#include "lisp.h"
+#include "xwidget.h"
+
+/* Functions for xwidget webkit.  */
+
+bool nsxwidget_is_web_view (struct xwidget *xw);
+void nsxwidget_webkit_goto_uri (struct xwidget *xw, const char *uri);
+void nsxwidget_webkit_zoom (struct xwidget *xw, double zoom_change);
+void nsxwidget_webkit_execute_script (struct xwidget *xw, const char *script,
+                                      Lisp_Object fun);
+
+/* Functions for xwidget model.  */
+
+#ifdef __OBJC__
+@interface XwWindow : NSView
+@property struct xwidget *xw;
+@end
+#endif
+
+void nsxwidget_init (struct xwidget *xw);
+void nsxwidget_kill (struct xwidget *xw);
+void nsxwidget_resize (struct xwidget *xw);
+Lisp_Object nsxwidget_get_size (struct xwidget *xw);
+
+/* Functions for xwidget view.  */
+
+#ifdef __OBJC__
+@interface XvWindow : NSView
+@property struct xwidget *xw;
+@property struct xwidget_view *xv;
+@end
+#endif
+
+void nsxwidget_init_view (struct xwidget_view *xv,
+                          struct xwidget *xww,
+                          struct glyph_string *s,
+                          int x, int y);
+void nsxwidget_delete_view (struct xwidget_view *xv);
+
+void nsxwidget_show_view (struct xwidget_view *xv);
+void nsxwidget_hide_view (struct xwidget_view *xv);
+void nsxwidget_resize_view (struct xwidget_view *xv,
+                            int widget, int height);
+
+void nsxwidget_move_view (struct xwidget_view *xv, int x, int y);
+void nsxwidget_move_widget_in_view (struct xwidget_view *xv, int x, int y);
+void nsxwidget_set_needsdisplay (struct xwidget_view *xv);
+
+#endif /* NSXWIDGET_H_INCLUDED */