api: nvim_list_uis #8004

ref #7438
closes #4842

2 files changed, 26 insertions, 0 deletions

diff --git a/src/nvim/api/vim.c b/src/nvim/api/vim.c
index 0e7cc428d4..dad67c5e4b 100644
--- a/src/nvim/api/vim.c
+++ b/src/nvim/api/vim.c
@@ -35,6 +35,7 @@
 #include "nvim/os/input.h"
 #include "nvim/viml/parser/expressions.h"
 #include "nvim/viml/parser/parser.h"
+#include "nvim/ui.h"
 
 #define LINE_BUFFER_SIZE 4096
 
@@ -1468,3 +1469,12 @@ Float nvim__id_float(Float flt)
 {
   return flt;
 }
+
+/// Gets a list of dictionaries representing attached UIs.
+///
+/// @return Array of UI dictionaries
+Array nvim_list_uis(void)
+  FUNC_API_SINCE(4)
+{
+  return ui_array();
+}
diff --git a/src/nvim/ui.c b/src/nvim/ui.c
index f4d3cd987d..c70a02d960 100644
--- a/src/nvim/ui.c
+++ b/src/nvim/ui.c
@@ -526,3 +526,19 @@ bool ui_is_external(UIExtension widget)
 {
   return ui_ext[widget];
 }
+
+Array ui_array(void)
+{
+  Array all_uis = ARRAY_DICT_INIT;
+  for (size_t i = 0; i < ui_count; i++) {
+    Dictionary dic = ARRAY_DICT_INIT;
+    PUT(dic, "width", INTEGER_OBJ(uis[i]->width));
+    PUT(dic, "height", INTEGER_OBJ(uis[i]->height));
+    PUT(dic, "rgb", BOOLEAN_OBJ(uis[i]->rgb));
+    for (UIExtension j = 0; j < kUIExtCount; j++) {
+      PUT(dic, ui_ext_names[j], BOOLEAN_OBJ(uis[i]->ui_ext[j]));
+    }
+    ADD(all_uis, DICTIONARY_OBJ(dic));
+  }
+  return all_uis;
+}