Add clipboard bindings.

* sdl2/bindings.scm (sdl-get-clipboard-text, sdl-set-clipboard-text,
sdl-has-clipboard-text): New procedures.
* sdl2/clipboard.scm: New file.
* Makefile.am (SOURCES): Add it.

3 files changed, 63 insertions, 0 deletions

diff --git a/Makefile.am b/Makefile.am
index d884ffc..7325bee 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -44,6 +44,7 @@ SOURCES =					\
   sdl2.scm					\
   sdl2/config.scm				\
   sdl2/bindings.scm				\
+  sdl2/clipboard.scm				\
   sdl2/surface.scm				\
   sdl2/render.scm				\
   sdl2/video.scm				\
diff --git a/sdl2/bindings.scm b/sdl2/bindings.scm
index 180f887..4644f1e 100644
--- a/sdl2/bindings.scm
+++ b/sdl2/bindings.scm
@@ -1130,3 +1130,17 @@ RETURN-TYPE and accept arguments of ARG-TYPES."
 
 (define-foreign sdl-is-game-controller
   sdl-bool "SDL_IsGameController" (list int))
+
+
+;;;
+;;; Clipboard
+;;;
+
+(define-foreign sdl-get-clipboard-text
+  '* "SDL_GetClipboardText" '())
+
+(define-foreign sdl-set-clipboard-text
+  int "SDL_SetClipboardText" '(*))
+
+(define-foreign sdl-has-clipboard-text
+  int "SDL_HasClipboardText" '())
diff --git a/sdl2/clipboard.scm b/sdl2/clipboard.scm
new file mode 100644
index 0000000..5595abf
--- /dev/null
+++ b/sdl2/clipboard.scm
@@ -0,0 +1,48 @@
+;;; guile-sdl2 --- FFI bindings for SDL2
+;;; Copyright © 2017 David Thompson <davet@gnu.org>
+;;;
+;;; This file is part of guile-sdl2.
+;;;
+;;; Guile-sdl2 is free software; you can redistribute it and/or modify
+;;; it under the terms of the GNU Lesser General Public License as
+;;; published by the Free Software Foundation; either version 3 of the
+;;; License, or (at your option) any later version.
+;;;
+;;; Guile-sdl2 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 Lesser General Public
+;;; License along with guile-sdl2.  If not, see
+;;; <http://www.gnu.org/licenses/>.
+
+;;; Commentary:
+;;
+;; OS clipboard manipulation.
+;;
+;;; Code:
+
+(define-module (sdl2 clipboard)
+  #:use-module (sdl2)
+  #:use-module ((sdl2 bindings) #:prefix ffi:)
+  #:use-module (system foreign)
+  #:export (clipboard-text?
+            clipboard-text
+            set-clipboard-text!))
+
+(define (clipboard-text?)
+  "Return #t if there is text in the OS clipboard."
+  (= 1 (ffi:sdl-has-clipboard-text)))
+
+(define (clipboard-text)
+  "Return a string containing the text in the OS clipboard."
+  (let ((ret (ffi:sdl-get-clipboard-text)))
+    (if (null-pointer? ret)
+        (sdl-error "clipboard-text" "failed to get clipboard text")
+        (pointer->string ret))))
+
+(define (set-clipboard-text! str)
+  "Put the text in STR into the OS clipboard."
+  (unless (zero? (ffi:sdl-set-clipboard-text (string->pointer str)))
+    (sdl-error "set-clipboard-text!" "failed to set clipboard text")))