gdkselection-win32.c

linux下电话本所依赖的一些图形库

  g_return_val_if_fail (display == _gdk_display, 0);

  GDK_NOTE (DND, (enc_name = gdk_atom_name (encoding),
		  g_print ("gdk_text_property_to_text_list: %s %d %.20s %d\n",
			   enc_name, format, text, length),
		  g_free (enc_name)));

  if (!list)
    return 0;

  if (encoding == GDK_TARGET_STRING)
    source_charset = "ISO-8859-1";
  else if (encoding == _utf8_string)
    source_charset = "UTF-8";
  else
    source_charset = gdk_atom_name (encoding);
    
  g_get_charset (&charset);

  result = g_convert (text, length, charset, source_charset,
		      NULL, NULL, &error);
  if (!result)
    {
      g_error_free (error);
      return 0;
    }

  *list = g_new (gchar *, 1);
  **list = result;
  
  return 1;
}

void
gdk_free_text_list (gchar **list)
{
  g_return_if_fail (list != NULL);

  g_free (*list);
  g_free (list);
}

static gint
make_list (const gchar  *text,
	   gint          length,
	   gboolean      latin1,
	   gchar      ***list)
{
  GSList *strings = NULL;
  gint n_strings = 0;
  gint i;
  const gchar *p = text;
  const gchar *q;
  GSList *tmp_list;
  GError *error = NULL;

  while (p < text + length)
    {
      gchar *str;
      
      q = p;
      while (*q && q < text + length)
	q++;

      if (latin1)
	{
	  str = g_convert (p, q - p,
			   "UTF-8", "ISO-8859-1",
			   NULL, NULL, &error);

	  if (!str)
	    {
	      g_warning ("Error converting selection from STRING: %s",
			 error->message);
	      g_error_free (error);
	    }
	}
      else
	str = g_strndup (p, q - p);

      if (str)
	{
	  strings = g_slist_prepend (strings, str);
	  n_strings++;
	}

      p = q + 1;
    }

  if (list)
    *list = g_new (gchar *, n_strings + 1);

  (*list)[n_strings] = NULL;
  
  i = n_strings;
  tmp_list = strings;
  while (tmp_list)
    {
      if (list)
	(*list)[--i] = tmp_list->data;
      else
	g_free (tmp_list->data);

      tmp_list = tmp_list->next;
    }

  g_slist_free (strings);

  return n_strings;
}

gint 
gdk_text_property_to_utf8_list_for_display (GdkDisplay    *display,
                                            GdkAtom        encoding,
                                            gint           format,
                                            const guchar  *text,
                                            gint           length,
                                            gchar       ***list)
{
  g_return_val_if_fail (text != NULL, 0);
  g_return_val_if_fail (length >= 0, 0);
  g_return_val_if_fail (display == _gdk_display, 0);

  if (encoding == GDK_TARGET_STRING)
    {
      return make_list ((gchar *)text, length, TRUE, list);
    }
  else if (encoding == _utf8_string)
    {
      return make_list ((gchar *)text, length, FALSE, list);
    }
  else
    {
      g_warning ("gdk_text_property_to_utf8_list_for_display: encoding %s not handled\n", gdk_atom_name (encoding));

      if (list)
	*list = NULL;

      return 0;
    }
}

gint
gdk_string_to_compound_text_for_display (GdkDisplay  *display,
					 const gchar *str,
					 GdkAtom     *encoding,
					 gint        *format,
					 guchar     **ctext,
					 gint        *length)
{
  g_return_val_if_fail (str != NULL, 0);
  g_return_val_if_fail (length >= 0, 0);
  g_return_val_if_fail (display == _gdk_display, 0);

  GDK_NOTE (DND, g_print ("gdk_string_to_compound_text_for_display: %.20s\n", str));

  /* Always fail on Win32. No COMPOUND_TEXT support. */

  if (encoding)
    *encoding = GDK_NONE;

  if (format)
    *format = 0;

  if (ctext)
    *ctext = NULL;

  if (length)
    *length = 0;

  return -1;
}

gchar *
gdk_utf8_to_string_target (const gchar *str)
{
  return _gdk_utf8_to_string_target_internal (str, strlen (str));
}

gboolean
gdk_utf8_to_compound_text_for_display (GdkDisplay  *display,
                                       const gchar *str,
                                       GdkAtom     *encoding,
                                       gint        *format,
                                       guchar     **ctext,
                                       gint        *length)
{
  g_return_val_if_fail (str != NULL, FALSE);
  g_return_val_if_fail (display == _gdk_display, FALSE);

  GDK_NOTE (DND, g_print ("gdk_utf8_to_compound_text_for_display: %.20s\n", str));

  /* Always fail on Win32. No COMPOUND_TEXT support. */

  if (encoding)
    *encoding = GDK_NONE;

  if (format)
    *format = 0;
  
  if (ctext)
    *ctext = NULL;

  if (length)
    *length = 0;

  return FALSE;
}

void
gdk_free_compound_text (guchar *ctext)
{
  /* As we never generate anything claimed to be COMPOUND_TEXT, this
   * should never be called. Or if it is called, ctext should be the
   * NULL returned for conversions to COMPOUND_TEXT above.
   */
  g_return_if_fail (ctext == NULL);
}

void
gdk_win32_selection_add_targets (GdkWindow  *owner,
				 GdkAtom     selection,
				 gint	     n_targets,
				 GdkAtom    *targets)
{
  HWND hwnd;
  const gchar *target_name;
  guint formatid;
  gint i;
  GSList *convertable_formats, *format;
  gboolean has_set_dib = FALSE, has_real_dib = FALSE;

  if (selection != GDK_SELECTION_CLIPBOARD)
    return;

  if (owner != NULL)
    {
      if (GDK_WINDOW_DESTROYED (owner))
	return;
      hwnd = GDK_WINDOW_HWND (owner);
    }

  if (!API_CALL (OpenClipboard, (hwnd)))
    return;

  convertable_formats = gdk_pixbuf_get_formats ();
  for (i = 0; i < n_targets; ++i)
    {
      if (targets[i] == _utf8_string)
	continue;

      target_name = gdk_atom_name (targets[i]);
      if (!(formatid = RegisterClipboardFormat (target_name))) {
	WIN32_API_FAILED ("RegisterClipboardFormat");
	API_CALL (CloseClipboard, ());
	return;
      }
      g_hash_table_replace (_format_atom_table, GINT_TO_POINTER (formatid), targets[i]);
      SetClipboardData (formatid, NULL);

      /* We should replace the previous image format associated with
       * CF_DIB with "image/bmp" if we find "image/bmp", "image/x-bmp"
       * or "image/x-MS-bmp" is available.
       */
      if (!has_real_dib &&
	  (!strcmp (target_name, "image/bmp") ||
	   !strcmp (target_name, "image/x-bmp") ||
	   !strcmp (target_name, "image/x-MS-bmp")))
	{
	  g_hash_table_replace (_format_atom_table,
				GINT_TO_POINTER (CF_DIB),
				targets[i]);
	  if (!has_set_dib) {
	    SetClipboardData (CF_DIB, NULL);
	    has_set_dib = TRUE;
	  }
	  has_real_dib = TRUE;
	  continue;
	}

      for (format = convertable_formats; !has_set_dib && format; format = format->next)
	{
	  gchar **mime_types =
	    gdk_pixbuf_format_get_mime_types ((GdkPixbufFormat *) format->data);

	  for (; *mime_types; ++mime_types)
	    {
	      if (!strcmp (target_name, *mime_types))
	        {
		  g_hash_table_replace (_format_atom_table,
					GINT_TO_POINTER (CF_DIB),
					targets[i]);
		  SetClipboardData (CF_DIB, NULL);
		  has_set_dib = TRUE;
		  break;
		}
	    }
	}
    }
  g_slist_free (convertable_formats);

  API_CALL (CloseClipboard, ());
}

/* Convert from types such as "image/jpg" or "image/png" to DIB using
 * gdk-pixbuf so that image copied from GTK+ apps can be pasted in
 * native apps like mspaint.exe
 */
HGLOBAL
_gdk_win32_selection_convert_to_dib (HGLOBAL  hdata,
				     GdkAtom  target)
{
  GdkPixbufLoader *loader;
  GdkPixbuf *pixbuf;
  const gchar *target_name;
  guchar *ptr;
  gchar *bmp_buf;
  gsize size;
  gboolean ok;

  if (!(target_name = gdk_atom_name (target)))
    {
      GlobalFree (hdata);
      return NULL;
    }

  if (!strcmp (target_name, "image/bmp") ||
      !strcmp (target_name, "image/x-bmp") ||
      !strcmp (target_name, "image/x-MS-bmp"))
    {
      /* No conversion is needed, just strip the BITMAPFILEHEADER */
      HGLOBAL hdatanew;

      size = GlobalSize (hdata) - 1 - sizeof (BITMAPFILEHEADER);
      ptr = GlobalLock (hdata);
      memmove (ptr, ptr + sizeof (BITMAPFILEHEADER), size);
      GlobalUnlock (hdata);
      if (!(hdatanew = GlobalReAlloc (hdata, size, 0))) {
	WIN32_API_FAILED ("GlobalReAlloc");
	GlobalFree (hdata); /* the old hdata is not freed if error */
      }
      return hdatanew;
    }

  /* We actually provide image formats -other than- "image/bmp" etc
   * and the requestor is either a native Win32 application or a GTK+
   * client that requested "image/bmp".
   */
  if (!(loader = gdk_pixbuf_loader_new_with_mime_type (target_name, NULL)))
    {
      GlobalFree (hdata);
      return NULL;
    }

  ptr = GlobalLock (hdata);
  ok = gdk_pixbuf_loader_write (loader, ptr, GlobalSize (hdata) - 1, NULL) &&
       gdk_pixbuf_loader_close (loader, NULL);

  GlobalUnlock (hdata);
  GlobalFree (hdata);
  hdata = NULL;

  if (ok && (pixbuf = gdk_pixbuf_loader_get_pixbuf (loader)) != NULL)
    g_object_ref (pixbuf);

  g_object_unref (loader);

  if (ok && gdk_pixbuf_save_to_buffer (pixbuf, &bmp_buf, &size, "bmp", NULL, NULL))
    {
      size -= sizeof (BITMAPFILEHEADER);
      if (!(hdata = GlobalAlloc (GMEM_MOVEABLE, size)))
	{
	  WIN32_API_FAILED ("GlobalAlloc");
	  ok = FALSE;
	}

      if (ok)
	{
	  ptr = GlobalLock (hdata);
	  memcpy (ptr, bmp_buf + sizeof (BITMAPFILEHEADER), size);
	  GlobalUnlock (hdata);
	}

      g_free (bmp_buf);
      g_object_unref (pixbuf);
    }

  return hdata;
}