[gedit/wip/loader-saver] tab: some file loading post-processing

[Sébastien Wilmet <swilmet src gnome org>]

commit 7221d3a0a2d9fc0cc0e5fcf1ea4faf9c21122d75
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Mon Jun 23 15:26:03 2014 +0200

    tab: some file loading post-processing
    
    Goto line and save encoding metadata.

 gedit/gedit-tab.c |   90 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 files changed, 90 insertions(+), 0 deletions(-)
---
diff --git a/gedit/gedit-tab.c b/gedit/gedit-tab.c
index 4ca395f..265364c 100644
--- a/gedit/gedit-tab.c
+++ b/gedit/gedit-tab.c
@@ -23,6 +23,7 @@
 #include <config.h>
 #endif
 
+#include <stdlib.h>
 #include <glib/gi18n.h>
 
 #include "gedit-tab.h"
@@ -77,6 +78,7 @@ struct _GeditTabPrivate
 
        /* tmp data for loading */
        guint                   load_create : 1;
+       guint                   user_requested_encoding : 1;
 };
 
 G_DEFINE_TYPE_WITH_PRIVATE (GeditTab, gedit_tab, GTK_TYPE_BOX)
@@ -1964,10 +1966,60 @@ progress_cb (goffset   size,
 }
 
 static void
+goto_line (GeditTab *tab)
+{
+       GeditDocument *doc = gedit_tab_get_document (tab);
+       GtkTextIter iter;
+
+       /* Move the cursor at the requested line if any. */
+       if (tab->priv->tmp_line_pos > 0)
+       {
+               gedit_document_goto_line_offset (doc,
+                                                tab->priv->tmp_line_pos - 1,
+                                                MAX (0, tab->priv->tmp_column_pos - 1));
+               return;
+       }
+
+       /* If enabled, move to the position stored in the metadata. */
+       if (g_settings_get_boolean (tab->priv->editor, GEDIT_SETTINGS_RESTORE_CURSOR_POSITION))
+       {
+               gchar *pos;
+               gint offset;
+
+               pos = gedit_document_get_metadata (doc, GEDIT_METADATA_ATTRIBUTE_POSITION);
+
+               offset = pos != NULL ? atoi (pos) : 0;
+               g_free (pos);
+
+               gtk_text_buffer_get_iter_at_offset (GTK_TEXT_BUFFER (doc),
+                                                   &iter,
+                                                   MAX (0, offset));
+
+               /* make sure it's a valid position, if the file
+                * changed we may have ended up in the middle of
+                * a utf8 character cluster */
+               if (!gtk_text_iter_is_cursor_position (&iter))
+               {
+                       gtk_text_iter_set_line_offset (&iter, 0);
+               }
+       }
+
+       /* Otherwise to the top. */
+       else
+       {
+               gtk_text_buffer_get_start_iter (GTK_TEXT_BUFFER (doc), &iter);
+       }
+
+       gtk_text_buffer_place_cursor (GTK_TEXT_BUFFER (doc), &iter);
+}
+
+static void
 load_cb (GtkSourceFileLoader *loader,
         GAsyncResult        *result,
         GeditTab            *tab)
 {
+       GeditDocument *doc = gedit_tab_get_document (tab);
+       GFile *location = gtk_source_file_loader_get_location (loader);
        GError *error = NULL;
 
        gtk_source_file_loader_load_finish (loader, result, &error);
@@ -1978,13 +2030,48 @@ load_cb (GtkSourceFileLoader *loader,
                g_error_free (error);
        }
 
+       /* Load was successful. */
+       if (error == NULL ||
+           (error->domain == GTK_SOURCE_FILE_LOADER_ERROR &&
+            error->code == GTK_SOURCE_FILE_LOADER_ERROR_CONVERSION_FALLBACK))
+       {
+               if (tab->priv->user_requested_encoding)
+               {
+                       const GtkSourceEncoding *encoding = gtk_source_file_loader_get_encoding (loader);
+                       const gchar *charset = gtk_source_encoding_get_charset (encoding);
+
+                       gedit_document_set_metadata (doc,
+                                                    GEDIT_METADATA_ATTRIBUTE_ENCODING, charset,
+                                                    NULL);
+               }
+
+               goto_line (tab);
+       }
+
+       /* Special case creating a named new doc. */
+       else if (tab->priv->load_create &&
+                error->domain == G_IO_ERROR &&
+                error->code == G_IO_ERROR_NOT_FOUND &&
+                g_file_has_uri_scheme (location, "file"))
+       {
+               g_error_free (error);
+               error = NULL;
+       }
+
        g_clear_object (&tab->priv->loader);
        g_clear_object (&tab->priv->cancellable);
 
+       g_signal_emit_by_name (doc, "loaded", NULL);
+
        gedit_tab_set_state (tab, GEDIT_TAB_STATE_NORMAL);
 
        /* Async operation finished. */
        g_object_unref (tab);
+
+       if (error != NULL)
+       {
+               g_error_free (error);
+       }
 }
 
 void
@@ -2013,12 +2100,15 @@ _gedit_tab_load (GeditTab                *tab,
 
        if (encoding != NULL)
        {
+               tab->priv->user_requested_encoding = TRUE;
+
                GSList *list = g_slist_append (NULL, (gpointer) encoding);
                gtk_source_file_loader_set_candidate_encodings (tab->priv->loader, list);
                g_slist_free (list);
        }
        else
        {
+               tab->priv->user_requested_encoding = FALSE;
                /* TODO */
        }