Add ClipboardExtendedPlugin unix platform code from the OLPC project.

Author takashi (OLPC project 2007), development commit log is in the olpc
branch at squeakvm.org. Included in squeakvm.org trunk unix builds since
2008. There has been no change to the source file since 2007.

platforms/unix/plugins/ClipboardExtendedPlugin/sqUnixExtendedClipboard.c

@@ -0,0 +1,175 @@
+/*  sqUnixExtendedClipboard.c  -- support for clipboard with multiple types
+ *
+ * Copyright (C) 2007 by Viewpoints Research Institute and other
+ *                             authors/contributors as listed.
+ *   All rights reserved.
+ *   
+ *   This file is part of Unix Squeak.
+ * 
+ *   Permission is hereby granted, free of charge, to any person obtaining a copy
+ *   of this software and associated documentation files (the "Software"), to deal
+ *   in the Software without restriction, including without limitation the rights
+ *   to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *   copies of the Software, and to permit persons to whom the Software is
+ *   furnished to do so, subject to the following conditions:
+ * 
+ *   The above copyright notice and this permission notice shall be included in
+ *   all copies or substantial portions of the Software.
+ * 
+ *   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *   IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *   AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *   LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *   OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *   SOFTWARE.
+ */
+
+#include<string.h>
+#include<stdio.h>
+#include<stdlib.h>
+#include<X11/Xlib.h>
+#include<X11/Xatom.h>
+
+#ifdef CLIPBOARD_TEST
+  #include<stdio.h>
+  typedef int sqInt;
+#else
+  #include "sqVirtualMachine.h"
+  extern struct VirtualMachine* interpreterProxy;
+#endif /* ifdef CLIPBOARD_TEST */
+
+extern Display * stDisplay;
+
+char ** clipboardGetTypeNames();
+sqInt clipboardSizeWithType(char * typeName, int ntypeName);
+sqInt clipboardReadIntoAt(sqInt count, sqInt byteArrayIndex, sqInt startIndex);
+void * firstIndexableField(sqInt oop);
+void clipboardWriteWithType(char * data, size_t ndata, char * typeName, size_t ntypeName, int isDnd, int isClaiming);
+
+#ifndef CLIPBOARD_TEST
+
+void sqPasteboardClear( sqInt inPasteboard )
+{
+  /* NOT IMPLEMENTED YET */
+}
+
+/* Return a number of types.
+ * Update it only if the selection is CLIPBOARD
+ */
+int sqPasteboardGetItemCount(sqInt inPasteboard)
+{
+  int i= 0;
+  char ** types;
+  types= clipboardGetTypeNames();
+  if (NULL == types) return 0;
+  for (i= 0; NULL != types[i]; i++) free(types[i]); /* XFree() is better */
+  free(types);
+  return i;
+}
+
+/* Answer a type name at index. */
+int sqPasteboardCopyItemFlavorsitemNumber (sqInt inPasteboard, int formatNumber)
+{
+  size_t length;
+  int outData;
+  char * dest;
+  char ** types;
+  char * type;
+
+  if (formatNumber < 1)
+    return interpreterProxy->nilObject();
+
+  /* TODO: clipboardGetTypeNames() is should be cached. */
+  /* TODO: types should be free(). */
+  types= clipboardGetTypeNames();
+  if (types == NULL)
+    return interpreterProxy->nilObject();
+
+  type= types[formatNumber - 1];
+  if (type == NULL)
+    return interpreterProxy->nilObject();
+
+  length= strlen(type);
+  outData = interpreterProxy->instantiateClassindexableSize(interpreterProxy->classString(), length);
+
+  dest = ((char *) (interpreterProxy->firstIndexableField(outData)));
+  memcpy(dest, type, length);
+
+  return outData;
+}
+
+/* In X11 clipboard is global in a display, so it just return 1 */
+sqInt sqCreateClipboard( void )
+{
+  return 1;
+}
+
+
+void sqPasteboardPutItemFlavordatalengthformatTypeformatLength ( sqInt inPasteboard, char * data, int ndata, char * typeName, int ntypeName)
+{
+  clipboardWriteWithType(data, ndata, typeName, ntypeName, 0, 1);
+}
+
+
+/* Read the clipboard */
+int sqPasteboardCopyItemFlavorDataformatformatLength (sqInt inPasteboard, char* format, int formatLength)
+{
+  int bytes= 0;
+  sqInt outData;
+
+  bytes= clipboardSizeWithType(format, formatLength);
+  outData = interpreterProxy->instantiateClassindexableSize(interpreterProxy->classByteArray(), bytes);
+  clipboardReadIntoAt(bytes, (sqInt) firstIndexableField(outData), 0);
+  return outData;
+}
+
+#endif /* #ifndef CLIPBOARD_TEST */
+
+#ifdef CLIPBOARD_TEST
+
+static Display * display;
+
+Display * ioGetDisplay()
+{
+  return display;
+}
+
+char * getSelectionData(Atom selection, Atom target, size_t * bytes, XEvent * event)
+{
+  char * answer= "Hello world!";
+  *bytes= strlen(answer) + 1;
+  char * result= calloc(*bytes, 1);
+  memcpy(result, answer, *bytes);
+  return result;
+}
+
+void updateInputTargets(Atom * newTargets, int targetSize)
+{
+}
+
+int main () {
+  Window window;
+  int i;
+  size_t nitems;
+
+  display= XOpenDisplay(NULL);
+  if(display == NULL) {
+    printf("Cannot open display\n");
+    return 1;
+  }
+  window= XCreateSimpleWindow(display, DefaultRootWindow(display),
+				 10, 10, 100, 100, 1, 0, 0);
+  getItemFravors();
+  getItemFravors();
+
+  printf("\n");
+  char * text= (char *) getSelectionData(
+					 atom("CLIPBOARD"),
+					 atom("STRING"), &nitems);
+  printf("String contents: %s\n", text);
+  return 0;
+}
+
+#endif /* CLIPBOARD_TEST */
+