add clipboard support

Signed-off-by: Arnav Bhatt <arnav@ghativega.in>

Makefile

@@ -82,7 +82,7 @@ video_OBJS = src/video/SDL_blit_0.o src/video/SDL_blit_1.o src/video/SDL_blit_A.
 		src/video/yuv2rgb/yuv_rgb_sse.o src/video/yuv2rgb/yuv_rgb_std.o \
 		src/video/kolibri/SDL_kolibrievents.o src/video/kolibri/SDL_kolibriframebuffer.o \
 		src/video/kolibri/SDL_kolibrivideo.o src/video/kolibri/SDL_kolibriwindow.o \
-		src/video/kolibri/SDL_kolibrimouse.o
+		src/video/kolibri/SDL_kolibrimouse.o src/video/kolibri/SDL_kolibriclipboard.o
 
 curr_OBJS = src/SDL_assert.o src/SDL_dataqueue.o src/SDL_error.o src/SDL_guid.o \
         src/SDL_hints.o src/SDL_list.o src/SDL_log.o src/SDL_utils.o src/SDL.o

src/video/kolibri/SDL_kolibriclipboard.c

@@ -0,0 +1,60 @@
+
+#include "../../SDL_internal.h"
+
+#ifdef SDL_VIDEO_DRIVER_KOLIBRI
+
+#include <sys/ksys.h>
+
+#define string_length(x) SDL_strlen(x) + 1
+
+#include "../SDL_sysvideo.h"
+
+char *KOLIBRI_GetClipboardText(_THIS)
+{
+    int clip_num = _ksys_clip_num();
+    char *clip_buf, *result;
+
+    if (clip_num > 0) {
+        clip_buf = _ksys_clip_get(clip_num - 1);
+        if ((int)*clip_buf > 0 && (int)*(clip_buf + 4) == KSYS_CLIP_TEXT && ((int)*(clip_buf + 8) == KSYS_CLIP_CP866)) {
+            char *clip_text = clip_buf + 12;
+
+            result = SDL_calloc((int)*clip_buf, sizeof(char));
+            SDL_strlcpy(result, clip_text, (int)*clip_buf);
+            _ksys_free(clip_buf);
+        }
+    }
+    if (!result)
+        result = SDL_strdup("");
+
+    return result;
+}
+
+int KOLIBRI_SetClipboardText(_THIS, const char *text)
+{
+    char *temp_buffer = SDL_calloc(string_length(text) + 12, sizeof(char));
+
+    *temp_buffer = string_length(text);
+    *(temp_buffer + 4) = KSYS_CLIP_TEXT;
+    *(temp_buffer + 8) = KSYS_CLIP_CP866;
+
+    SDL_strlcpy(temp_buffer + 12, text, string_length(text));
+    _ksys_clip_set(string_length(text) + 12, temp_buffer);
+    SDL_free(temp_buffer);
+
+    return 0;
+}
+
+SDL_bool KOLIBRI_HasClipboardText(_THIS)
+{
+    SDL_bool result = SDL_FALSE;
+    char *text = KOLIBRI_GetClipboardText(_this);
+    if (text) {
+        result = text[0] != '\0' ? SDL_TRUE : SDL_FALSE;
+        SDL_free(text);
+    }
+
+    return result;
+}
+
+#endif

src/video/kolibri/SDL_kolibriclipboard.h

@@ -0,0 +1,11 @@
+
+#include "../../SDL_internal.h"
+
+#ifndef SDL_kolibriclipboard_h_
+#define SDL_kolibriclipboard_h_
+
+extern char *KOLIBRI_GetClipboardText(_THIS);
+extern int KOLIBRI_SetClipboardText(_THIS, const char *text);
+extern SDL_bool KOLIBRI_HasClipboardText(_THIS);
+
+#endif

src/video/kolibri/SDL_kolibrivideo.c

@@ -10,6 +10,7 @@
 #include "../SDL_sysvideo.h"
 #include "SDL_video.h"
 
+#include "SDL_kolibriclipboard.h"
 #include "SDL_kolibrievents.h"
 #include "SDL_kolibriframebuffer.h"
 #include "SDL_kolibrimouse.h"
@@ -95,6 +96,11 @@ static SDL_VideoDevice *KOLIBRI_CreateDevice(void)
     device->SetWindowTitle = KOLIBRI_SetWindowTitle;
     device->DestroyWindow = KOLIBRI_DestroyWindow;
 
+    /* Clipboard */
+    device->HasClipboardText = KOLIBRI_HasClipboardText;
+    device->GetClipboardText = KOLIBRI_GetClipboardText;
+    device->SetClipboardText = KOLIBRI_SetClipboardText;
+
     /* KolibriOS specific data */
     device->driverdata = data;