File Browser: Improve usage of Enter-key to open files/directories

From a user-POV this makes following changes:
* Adds support for using the Enter-key to open directories
* Updates the upper text-buttons for file and directory on selection
* Last selected file/directory is opened now (in sync with upper text-buttons)
* Changes text in open button to "Open Directory" if a directory is selected

D1349, Reviewed by @mont29

1 files changed, 14 insertions, 0 deletions

diff --git a/source/blender/editors/space_file/filesel.c b/source/blender/editors/space_file/filesel.c
index 66eb79abae2..ef29b720eed 100644
--- a/source/blender/editors/space_file/filesel.c
+++ b/source/blender/editors/space_file/filesel.c
@@ -287,6 +287,17 @@ void ED_fileselect_reset_params(SpaceFile *sfile)
 	sfile->params->active_file = -1;
 }
 
+/**
+ * Sets FileSelectParams->file (name of selected file)
+ */
+void fileselect_file_set(SpaceFile *sfile, const int index)
+{
+	const struct direntry *file = filelist_file(sfile->files, index);
+	if (file && file->relname[0] && !FILENAME_IS_PARENT(file->relname)) {
+		BLI_strncpy(sfile->params->file, file->relname, FILE_MAXFILE);
+	}
+}
+
 int ED_fileselect_layout_numfiles(FileLayout *layout, ARegion *ar)
 {
 	int numfiles;
@@ -583,6 +594,9 @@ void ED_file_change_dir(bContext *C, const bool checkdir)
 			/* could return but just refresh the current dir */
 		}
 		filelist_setdir(sfile->files, sfile->params->dir);
+		/* clear selected file to avoid trying to open it from the new dir with changed path */
+		sfile->params->file[0] = '\0';
+		sfile->params->active_file = -1;
 		
 		if (folderlist_clear_next(sfile))
 			folderlist_free(sfile->folders_next);