Add a wrapper around gtk_clipboard_set_with_data

3 files changed, 160 insertions, 0 deletions

diff --git a/src/sugar3/Makefile.am b/src/sugar3/Makefile.am
index 0e46361..5e18ce0 100644
--- a/src/sugar3/Makefile.am
+++ b/src/sugar3/Makefile.am
@@ -48,6 +48,8 @@ libsugarext_la_SOURCES =		\
 	gsm-session.h			\
 	gsm-xsmp.c			\
 	gsm-xsmp.h			\
+        sugar-clipboard.c		\
+	sugar-clipboard.h		\
 	sugar-grid.c			\
 	sugar-grid.h			\
 	sugar-key-grabber.c		\
@@ -128,6 +130,8 @@ SugarExt_1_0_gir_FILES = \
 	gsm-session.h \
 	gsm-xsmp.c \
 	gsm-xsmp.h \
+	sugar-clipboard.c \
+	sugar-clipboard.h \
 	sugar-key-grabber.c \
 	sugar-key-grabber.h \
 	sugar-grid.c \
diff --git a/src/sugar3/sugar-clipboard.c b/src/sugar3/sugar-clipboard.c
new file mode 100644
index 0000000..0a8db87
--- /dev/null
+++ b/src/sugar3/sugar-clipboard.c
@@ -0,0 +1,121 @@
+/*
+ * Copyright (C) 2012, Daniel Narvaez
+ *
+ * This library 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 2 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#include <string.h>
+
+#include "sugar-clipboard.h"
+
+typedef struct {
+    GClosure *get_closure;
+    GClosure *clear_closure;
+} SetWithDataUserData;
+
+static void clipboard_data_get_func (GtkClipboard     *clipboard,
+                                     GtkSelectionData *selection_data,
+                                     guint             info,
+                                     gpointer          user_data)
+{
+    SetWithDataUserData *data = user_data;
+    GValue params[2] = { { 0, }, { 0, } };
+
+    g_value_init(&params[0], GTK_TYPE_SELECTION_DATA);
+    g_value_take_boxed(&params[0], selection_data);
+
+    g_value_init(&params[1], G_TYPE_UINT);
+    g_value_set_uint(&params[1], info);
+
+    g_closure_invoke(data->get_closure, NULL, 2, params, NULL);
+}
+
+static void clipboard_data_clear_func (GtkClipboard     *clipboard,
+                                       gpointer          user_data)
+{
+    SetWithDataUserData *data = user_data;
+
+    if (data->clear_closure) {
+        g_closure_invoke (data->clear_closure, NULL, 0, NULL, NULL);
+        g_closure_unref(data->clear_closure);
+    }
+
+    if (data->get_closure)
+        g_closure_unref(data->get_closure);
+
+    g_free(data);
+}
+
+/**
+ * sugar_clipboard_set_with_data:
+ * @clipboard: a #GtkClipboard
+ * @targets: (array length=n_targets): array containing information
+ *     about the available forms for the clipboard data
+ * @n_targets: number of elements in @targets
+ * @get_closure: #GClosure to call to get the actual clipboard data
+ * @clear_closure: (allow-none): when the clipboard contents are set again,
+ *     this #GClosure will be called, and @get_func will not be subsequently
+ *     called.
+ *
+ * Virtually sets the contents of the specified clipboard by providing
+ * a list of supported formats for the clipboard data and a closure
+ * to call to get the actual data when it is requested.
+ *
+ * Return value: %TRUE if setting the clipboard data succeeded.
+ *    If setting the clipboard data failed the provided closures
+ *    will be ignored.
+ **/
+gboolean
+sugar_clipboard_set_with_data (GtkClipboard          *clipboard,
+                               GtkTargetEntry       **targets,
+                               guint                  n_targets,
+                               GClosure              *get_closure,
+                               GClosure              *clear_closure)
+{
+
+    GtkTargetEntry *targets_flat;
+    int i;
+
+    g_return_val_if_fail(clipboard != NULL, FALSE);
+    g_return_val_if_fail(targets != NULL, FALSE);
+    g_return_val_if_fail(get_closure != NULL, FALSE);
+
+    targets_flat = g_new0(GtkTargetEntry, n_targets);
+
+    for (i = 0; i < n_targets; i++) {
+        memcpy(targets_flat + i * sizeof(GtkTargetEntry),
+               targets[i],
+               sizeof(GtkTargetEntry));
+    }
+
+    SetWithDataUserData *user_data = g_new0(SetWithDataUserData, 1);
+  
+    if (get_closure != NULL) {
+        user_data->get_closure = g_closure_ref(get_closure);
+        g_closure_sink(get_closure);
+    }
+
+    if (clear_closure != NULL) {
+        user_data->clear_closure = g_closure_ref(clear_closure);
+        g_closure_sink(clear_closure);
+    }
+
+    return gtk_clipboard_set_with_data(clipboard, targets_flat, n_targets,
+                                       clipboard_data_get_func,
+                                       clipboard_data_clear_func,
+                                       user_data);
+}
+
diff --git a/src/sugar3/sugar-clipboard.h b/src/sugar3/sugar-clipboard.h
new file mode 100644
index 0000000..6230bcd
--- /dev/null
+++ b/src/sugar3/sugar-clipboard.h
@@ -0,0 +1,35 @@
+/*
+ * Copyright (C) 2012, Daniel Narvaez
+ *
+ * This library 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 2 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#ifndef __SUGAR_CLIPBOARD_H__
+#define __SUGAR_CLIPBOARD_H__
+
+#include <gtk/gtk.h>
+
+G_BEGIN_DECLS
+
+gboolean sugar_clipboard_set_with_data (GtkClipboard          *clipboard,
+                                        GtkTargetEntry       **targets,
+                                        guint                  n_targets,
+                                        GClosure              *get_closure,
+                                        GClosure              *clear_closure);
+
+G_END_DECLS
+
+#endif /* __SUGAR_CLIPBOARD_H__ */