feat(ui): allow conceal to be defined in decorations

Unlike syntax conceal, change highlight of concealed char

Can be used in tree-sitter using "conceal" metadata.

1 files changed, 15 insertions, 0 deletions

diff --git a/src/nvim/decoration.c b/src/nvim/decoration.c
index fb709d12ff..a0f189ca38 100644
--- a/src/nvim/decoration.c
+++ b/src/nvim/decoration.c
@@ -312,6 +312,10 @@ next_mark:
 
   int attr = 0;
   size_t j = 0;
+  bool conceal = 0;
+  int conceal_char = 0;
+  int conceal_attr = 0;
+
   for (size_t i = 0; i < kv_size(state->active); i++) {
     DecorRange item = kv_A(state->active, i);
     bool active = false, keep = true;
@@ -336,6 +340,14 @@ next_mark:
     if (active && item.attr_id > 0) {
       attr = hl_combine_attr(attr, item.attr_id);
     }
+    if (active && item.decor.conceal) {
+      conceal = true;
+      if (item.start_row == state->row && item.start_col == col && item.decor.conceal_char) {
+        conceal_char = item.decor.conceal_char;
+        state->col_until = MIN(state->col_until, item.start_col);
+        conceal_attr = item.attr_id;
+      }
+    }
     if ((item.start_row == state->row && item.start_col <= col)
         && kv_size(item.decor.virt_text)
         && item.decor.virt_text_pos == kVTOverlay && item.win_col == -1) {
@@ -349,6 +361,9 @@ next_mark:
   }
   kv_size(state->active) = j;
   state->current = attr;
+  state->conceal = conceal;
+  state->conceal_char = conceal_char;
+  state->conceal_attr = conceal_attr;
   return attr;
 }