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[nautilus] Add support for a column that combines atime and mtime

commit 85a1b463bfb89c79064059cd3fbaeeeb8775ba89
Author: Florian MÃllner <fmuellner gnome org>
Date:   Tue Jul 24 18:58:58 2012 +0200

    Add support for a column that combines atime and mtime
    
    For many users, the difference between access and modification time
    is rather unobvious, so add support for a "Used" column, which combines
    the two times, and make it default.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=680550

 libnautilus-private/nautilus-column-utilities.c    |   10 ++++++
 libnautilus-private/nautilus-file.c                |   35 ++++++++++++++++++-
 libnautilus-private/nautilus-file.h                |    2 +
 libnautilus-private/nautilus-vfs-file.c            |   10 ++++++
 .../org.gnome.nautilus.gschema.xml.in              |    4 +-
 5 files changed, 57 insertions(+), 4 deletions(-)
---
diff --git a/libnautilus-private/nautilus-column-utilities.c b/libnautilus-private/nautilus-column-utilities.c
index 757f777..2f24fbe 100644
--- a/libnautilus-private/nautilus-column-utilities.c
+++ b/libnautilus-private/nautilus-column-utilities.c
@@ -35,6 +35,7 @@ static const char *default_column_order[] = {
 	"name",
 	"size",
 	"type",
+	"date_used",
 	"date_modified",
 	"date_accessed",
 	"owner",
@@ -76,6 +77,15 @@ get_builtin_columns (void)
 					       NULL));
 	columns = g_list_append (columns,
 				 g_object_new (NAUTILUS_TYPE_COLUMN,
+					       "name", "date_used",
+					       "attribute", "date_used",
+					       "label", _("Used"),
+					       "description", _("The date the file was last used."),
+					       "default-sort-order", GTK_SORT_DESCENDING,
+					       NULL));
+
+	columns = g_list_append (columns,
+				 g_object_new (NAUTILUS_TYPE_COLUMN,
 					       "name", "date_modified",
 					       "attribute", "date_modified",
 					       "label", _("Modified"),
diff --git a/libnautilus-private/nautilus-file.c b/libnautilus-private/nautilus-file.c
index 1721c68..71b1fef 100644
--- a/libnautilus-private/nautilus-file.c
+++ b/libnautilus-private/nautilus-file.c
@@ -124,6 +124,9 @@ static GQuark attribute_name_q,
 	attribute_accessed_date_q,
 	attribute_date_accessed_q,
 	attribute_date_accessed_full_q,
+	attribute_used_date_q,
+	attribute_date_used_q,
+	attribute_date_used_full_q,
 	attribute_mime_type_q,
 	attribute_size_detail_q,
 	attribute_deep_size_q,
@@ -2720,6 +2723,9 @@ get_time (NautilusFile *file,
 	case NAUTILUS_DATE_TYPE_ACCESSED:
 		time = file->details->atime;
 		break;
+	case NAUTILUS_DATE_TYPE_USED:
+		time = MAX (file->details->atime, file->details->mtime);
+		break;
 	case NAUTILUS_DATE_TYPE_TRASHED:
 		time = file->details->trash_time;
 		break;
@@ -3147,6 +3153,12 @@ nautilus_file_compare_for_sort (NautilusFile *file_1,
 				result = compare_by_full_path (file_1, file_2);
 			}
 			break;
+		case NAUTILUS_FILE_SORT_BY_USED_TIME:
+			result = compare_by_time (file_1, file_2, NAUTILUS_DATE_TYPE_USED);
+			if (result == 0) {
+				result = compare_by_full_path (file_1, file_2);
+			}
+			break;
 		case NAUTILUS_FILE_SORT_BY_TRASHED_TIME:
 			result = compare_by_time (file_1, file_2, NAUTILUS_DATE_TYPE_TRASHED);
 			if (result == 0) {
@@ -3206,6 +3218,11 @@ nautilus_file_compare_for_sort_by_attribute_q   (NautilusFile
 						       NAUTILUS_FILE_SORT_BY_ATIME,
 						       directories_first,
 						       reversed);
+        } else if (attribute == attribute_used_date_q || attribute == attribute_date_used_q || attribute == attribute_date_used_full_q) {
+		return nautilus_file_compare_for_sort (file_1, file_2,
+						       NAUTILUS_FILE_SORT_BY_ATIME,
+						       directories_first,
+						       reversed);
         } else if (attribute == attribute_trashed_on_q || attribute == attribute_trashed_on_full_q) {
 		return nautilus_file_compare_for_sort (file_1, file_2,
 						       NAUTILUS_FILE_SORT_BY_TRASHED_TIME,
@@ -4298,6 +4315,7 @@ nautilus_file_get_date (NautilusFile *file,
 	g_return_val_if_fail (date_type == NAUTILUS_DATE_TYPE_CHANGED
 			      || date_type == NAUTILUS_DATE_TYPE_ACCESSED
 			      || date_type == NAUTILUS_DATE_TYPE_MODIFIED
+			      || date_type == NAUTILUS_DATE_TYPE_USED
 			      || date_type == NAUTILUS_DATE_TYPE_TRASHED
 			      || date_type == NAUTILUS_DATE_TYPE_PERMISSIONS_CHANGED, FALSE);
 
@@ -5852,8 +5870,8 @@ nautilus_file_get_deep_directory_count_as_string (NautilusFile *file)
  * @file: NautilusFile representing the file in question.
  * @attribute_name: The name of the desired attribute. The currently supported
  * set includes "name", "type", "mime_type", "size", "deep_size", "deep_directory_count",
- * "deep_file_count", "deep_total_count", "date_modified", "date_changed", "date_accessed",
- * "date_permissions", "date_modified_full", "date_changed_full", "date_accessed_full",
+ * "deep_file_count", "deep_total_count", "date_modified", "date_changed", "date_accessed", "date_used",
+ * "date_permissions", "date_modified_full", "date_changed_full", "date_accessed_full", "date_used_full",
  * "date_permissions_full", "owner", "group", "permissions", "octal_permissions", "uri", "where",
  * "link_target", "volume", "free_space", "selinux_context", "trashed_on", "trashed_on_full", "trashed_orig_path"
  * 
@@ -5926,6 +5944,16 @@ nautilus_file_get_string_attribute_q (NautilusFile *file, GQuark attribute_q)
 							 NAUTILUS_DATE_TYPE_ACCESSED,
 							 FALSE);
 	}
+	if (attribute_q == attribute_date_used_q) {
+		return nautilus_file_get_date_as_string (file,
+							 NAUTILUS_DATE_TYPE_USED,
+							 TRUE);
+	}
+	if (attribute_q == attribute_date_used_full_q) {
+		return nautilus_file_get_date_as_string (file,
+							 NAUTILUS_DATE_TYPE_USED,
+							 FALSE);
+	}
 	if (attribute_q == attribute_trashed_on_q) {
 		return nautilus_file_get_date_as_string (file,
 							 NAUTILUS_DATE_TYPE_TRASHED,
@@ -7896,6 +7924,9 @@ nautilus_file_class_init (NautilusFileClass *class)
 	attribute_accessed_date_q = g_quark_from_static_string ("accessed_date");
 	attribute_date_accessed_q = g_quark_from_static_string ("date_accessed");
 	attribute_date_accessed_full_q = g_quark_from_static_string ("date_accessed_full");
+	attribute_used_date_q = g_quark_from_static_string ("used_date");
+	attribute_date_used_q = g_quark_from_static_string ("date_used");
+	attribute_date_used_full_q = g_quark_from_static_string ("date_used_full");
 	attribute_mime_type_q = g_quark_from_static_string ("mime_type");
 	attribute_size_detail_q = g_quark_from_static_string ("size_detail");
 	attribute_deep_size_q = g_quark_from_static_string ("deep_size");
diff --git a/libnautilus-private/nautilus-file.h b/libnautilus-private/nautilus-file.h
index f482377..87118f8 100644
--- a/libnautilus-private/nautilus-file.h
+++ b/libnautilus-private/nautilus-file.h
@@ -60,6 +60,7 @@ typedef enum {
 	NAUTILUS_FILE_SORT_BY_TYPE,
 	NAUTILUS_FILE_SORT_BY_MTIME,
         NAUTILUS_FILE_SORT_BY_ATIME,
+        NAUTILUS_FILE_SORT_BY_USED_TIME,
 	NAUTILUS_FILE_SORT_BY_TRASHED_TIME
 } NautilusFileSortType;	
 
@@ -474,6 +475,7 @@ typedef enum {
 	NAUTILUS_DATE_TYPE_MODIFIED,
 	NAUTILUS_DATE_TYPE_CHANGED,
 	NAUTILUS_DATE_TYPE_ACCESSED,
+	NAUTILUS_DATE_TYPE_USED,
 	NAUTILUS_DATE_TYPE_PERMISSIONS_CHANGED,
 	NAUTILUS_DATE_TYPE_TRASHED
 } NautilusDateType;
diff --git a/libnautilus-private/nautilus-vfs-file.c b/libnautilus-private/nautilus-vfs-file.c
index fdb3ad0..44c1fc4 100644
--- a/libnautilus-private/nautilus-vfs-file.c
+++ b/libnautilus-private/nautilus-vfs-file.c
@@ -304,6 +304,16 @@ vfs_file_get_date (NautilusFile *file,
 			*date = file->details->mtime;
 		}
 		return TRUE;
+	case NAUTILUS_DATE_TYPE_USED:
+		/* Before we have info on a file, the date is unknown. */
+		if (file->details->mtime == 0 && file->details->atime == 0) {
+			return FALSE;
+		}
+		if (date != NULL) {
+			*date = MAX (file->details->atime,
+			             file->details->mtime);
+		}
+		return TRUE;
 	case NAUTILUS_DATE_TYPE_TRASHED:
 		/* Before we have info on a file, the date is unknown. */
 		if (file->details->trash_time == 0) {
diff --git a/libnautilus-private/org.gnome.nautilus.gschema.xml.in b/libnautilus-private/org.gnome.nautilus.gschema.xml.in
index 56435d1..262ced3 100644
--- a/libnautilus-private/org.gnome.nautilus.gschema.xml.in
+++ b/libnautilus-private/org.gnome.nautilus.gschema.xml.in
@@ -234,12 +234,12 @@
       <_description>Default zoom level used by the list view.</_description>
     </key>
     <key name="default-visible-columns" type="as">
-      <default>[ 'name', 'size', 'type', 'date_modified' ]</default>
+      <default>[ 'name', 'size', 'type', 'date_used' ]</default>
       <_summary>Default list of columns visible in the list view</_summary>
       <_description>Default list of columns visible in the list view.</_description>
     </key>
     <key name="default-column-order" type="as">
-      <default>[ 'name', 'size', 'type', 'date_modified' ]</default>
+      <default>[ 'name', 'size', 'type', 'date_used' ]</default>
       <_summary>Default column order in the list view</_summary>
       <_description>Default column order in the list view.</_description>
     </key>
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