UI: Bring back features for file path button

Adds back auto-completion and auto-creation (inserting a non-existing
file-path would create it) for the file path button. The second feature
was left out knowingly, but seems there are reasonable use cases for it.

We can't add these features to the button in the Python script, we have
to call into C. So using a template to do that.
Note that this is based on the old file browser code, I've copied over
the TODO comment.

1 files changed, 46 insertions, 0 deletions

diff --git a/source/blender/editors/space_file/file_draw.c b/source/blender/editors/space_file/file_draw.c
index 0083fc244d8..722cb885614 100644
--- a/source/blender/editors/space_file/file_draw.c
+++ b/source/blender/editors/space_file/file_draw.c
@@ -71,6 +71,52 @@
 
 #include "file_intern.h"  // own include
 
+void ED_file_path_button(bScreen *screen,
+                         const SpaceFile *sfile,
+                         FileSelectParams *params,
+                         uiBlock *block)
+{
+  PointerRNA params_rna_ptr;
+  uiBut *but;
+
+  RNA_pointer_create(&screen->id, &RNA_FileSelectParams, params, &params_rna_ptr);
+
+  /* callbacks for operator check functions */
+  UI_block_func_set(block, file_draw_check_cb, NULL, NULL);
+
+  but = uiDefButR(block,
+                  UI_BTYPE_TEXT,
+                  -1,
+                  "",
+                  0,
+                  0,
+                  UI_UNIT_X * 10,
+                  UI_UNIT_Y,
+                  &params_rna_ptr,
+                  "directory",
+                  0,
+                  0.0f,
+                  (float)FILE_MAX,
+                  0.0f,
+                  0.0f,
+                  TIP_("File path"));
+
+  BLI_assert(!UI_but_flag_is_set(but, UI_BUT_UNDO));
+  BLI_assert(!UI_but_is_utf8(but));
+
+  UI_but_func_complete_set(but, autocomplete_directory, NULL);
+  UI_but_funcN_set(but, file_directory_enter_handle, NULL, but);
+
+  /* TODO, directory editing is non-functional while a library is loaded
+   * until this is properly supported just disable it. */
+  if (sfile && sfile->files && filelist_lib(sfile->files)) {
+    UI_but_flag_enable(but, UI_BUT_DISABLED);
+  }
+
+  /* clear func */
+  UI_block_func_set(block, NULL, NULL, NULL);
+}
+
 /* Dummy helper - we need dynamic tooltips here. */
 static char *file_draw_tooltip_func(bContext *UNUSED(C), void *argN, const char *UNUSED(tip))
 {