From 656ecb1635d903edac2c57d1308dd6938063ad5c Mon Sep 17 00:00:00 2001
From: Roland Pfeifer <ristretto@pfeifer-syscon.de>
Date: Apr 20, 2020 6:01:11 PM

allow copy 2 clipboard

diff --git a/src/image_viewer.c b/src/image_viewer.c
index ebacd73..f561d32 100644
--- a/src/image_viewer.c
+++ b/src/image_viewer.c
@@ -1991,6 +1991,42 @@
 
 }
 
+gboolean
+rstto_image_viewer_copy_to_clipboard (
+        RsttoImageViewer *viewer,
+        GtkWidget *window)
+{
+    GtkWidget *widget = GTK_WIDGET (viewer);
+
+    if (viewer->priv->pixbuf)
+    {
+        gboolean load = TRUE;
+        guint width = gdk_pixbuf_get_width (viewer->priv->pixbuf);
+        guint height = gdk_pixbuf_get_height (viewer->priv->pixbuf);
+        // might also be helpful n_channels = gdk_pixbuf_get_n_channels (pixbuf);
+        // gdk_pixbuf_get_bits_per_sample (pixbuf)
+        if (width >= 1000 && height >= 1000)    // Warn only for larger images
+        {
+            GtkWidget *dialog = gtk_message_dialog_new (
+                    GTK_WINDOW (window),
+                    GTK_DIALOG_DESTROY_WITH_PARENT,
+                    GTK_MESSAGE_QUESTION,
+                    GTK_BUTTONS_YES_NO,
+                    _( "Copying image to clipboard may consume a large amount of memory (even if application is terminated).\nDo you want to continue?" ));
+            int response = gtk_dialog_run (GTK_DIALOG (dialog));
+            load = (response == GTK_RESPONSE_YES);
+            gtk_widget_destroy (dialog);
+        }
+        if (load)
+        {
+            GdkDisplay *display = gtk_widget_get_display (widget);
+            GtkClipboard *clipboard = gtk_clipboard_get_default (display);
+            gtk_clipboard_set_image (clipboard, viewer->priv->pixbuf);
+        }
+        return TRUE;
+    }
+    return FALSE;
+}
 
 /************************/
 /** CALLBACK FUNCTIONS **/
diff --git a/src/image_viewer.h b/src/image_viewer.h
index 7ce0615..471c760 100644
--- a/src/image_viewer.h
+++ b/src/image_viewer.h
@@ -124,6 +124,10 @@
 rstto_image_viewer_is_busy (
         RsttoImageViewer *viewer );
 
+gboolean
+rstto_image_viewer_copy_to_clipboard (
+        RsttoImageViewer *viewer,
+        GtkWidget *window);
 
 G_END_DECLS
 
diff --git a/src/main_window.c b/src/main_window.c
index 7978f79..664550f 100644
--- a/src/main_window.c
+++ b/src/main_window.c
@@ -389,6 +389,8 @@
         GParamSpec *pspec,
         gpointer user_data);
 
+static void
+cb_rstto_main_window_copy_to_clipboard (GtkWidget *widget, RsttoMainWindow *window);
 
 
 static GtkWidgetClass *parent_class = NULL;
@@ -438,6 +440,12 @@
             "<control>Q", /* Keyboard shortcut */
             N_ ("Quit Ristretto"), /* Tooltip text */
             G_CALLBACK (cb_rstto_main_window_quit), },
+  { "copy-to-clipboard",
+            "edit-copy", /* Icon-name */
+            N_ ("_Copy"), /* Label-text */
+            "<control>C", /* Keyboard shortcut */
+            N_ ("Copy image to clipboard"), /* Tooltip text */
+            G_CALLBACK (cb_rstto_main_window_copy_to_clipboard), },
 /* Edit Menu */
   { "edit-menu",
             NULL,
@@ -836,6 +844,7 @@
     GClosure        *quit_closure = g_cclosure_new ((GCallback)cb_rstto_main_window_quit, window, NULL);
     GClosure        *delete_closure = g_cclosure_new ((GCallback)cb_rstto_main_window_delete, window, NULL);
     GClosure        *refresh_closure = g_cclosure_new ((GCallback)cb_rstto_main_window_refresh, window, NULL);
+    GClosure        *copy_to_clipboard_closure = g_cclosure_new ((GCallback)cb_rstto_main_window_copy_to_clipboard, window, NULL);
 
     guint navigationbar_position = 3;
     guint thumbnail_size = 3;
@@ -924,6 +933,7 @@
     gtk_accel_group_connect_by_path (accel_group, "<Window>/quit", quit_closure);
     gtk_accel_group_connect_by_path (accel_group, "<Window>/delete", delete_closure);
     gtk_accel_group_connect_by_path (accel_group, "<Window>/refresh", refresh_closure);
+    gtk_accel_group_connect_by_path (accel_group, "<Window>/copy-to-clipboard", copy_to_clipboard_closure);
 
     /* Set default accelerators */
 
@@ -1706,7 +1716,8 @@
         //"/main-menu/file-menu/print",
         "/main-menu/file-menu/properties",
         "/main-menu/file-menu/close",
-        "/main-menu/edit-menu/delete"
+        "/main-menu/edit-menu/delete",
+        "/main-menu/edit-menu/copy-to-clipboard"
     };
 
     for (i = 0; i < G_N_ELEMENTS (actions); ++i)
@@ -1775,7 +1786,8 @@
         "/image-viewer-menu/zoom-in",
         "/image-viewer-menu/zoom-out",
         "/image-viewer-menu/zoom-100",
-        "/image-viewer-menu/zoom-fit"
+        "/image-viewer-menu/zoom-fit",
+        "/image-viewer-menu/copy-to-clipboard"
     };
 
     for (i = 0; i < G_N_ELEMENTS (actions); ++i)
@@ -3644,6 +3656,25 @@
     gtk_widget_hide (window->priv->warning);
 }
 
+static void
+cb_rstto_main_window_copy_to_clipboard (
+        GtkWidget *widget,
+        RsttoMainWindow *window)
+{
+    if (!rstto_image_viewer_copy_to_clipboard (
+            RSTTO_IMAGE_VIEWER( window->priv->image_viewer ), GTK_WIDGET( window )))
+    {
+        GtkWidget *dialog = gtk_message_dialog_new (
+                GTK_WINDOW (window),
+                GTK_DIALOG_DESTROY_WITH_PARENT,
+                GTK_MESSAGE_ERROR,
+                GTK_BUTTONS_OK,
+                _("An error occurred when copying image to clipboard.") );
+        gtk_dialog_run (GTK_DIALOG (dialog));
+        gtk_widget_destroy (dialog);
+    }
+}
+
 /**
  * cb_rstto_main_window_edit:
  * @widget:
diff --git a/src/main_window_ui.xml b/src/main_window_ui.xml
index 600da60..6d5853a 100644
--- a/src/main_window_ui.xml
+++ b/src/main_window_ui.xml
@@ -25,6 +25,8 @@
                 <menuitem action="sort-filetype"/>
                 <menuitem action="sort-date"/>
             </menu>
+            <menuitem action="copy-to-clipboard"/>
+            <separator/>
             <menuitem action="delete"/>
             <separator/>
             <menuitem action="clear-private-data"/>
@@ -106,6 +108,7 @@
         <menuitem action="open"/>
         <menuitem action="properties"/>
         <menuitem action="close"/>
+        <menuitem action="copy-to-clipboard"/>
         <separator/>
         <menu action="open-with-menu">
             <placeholder name="open-with-apps" />