Send mode_info_set messages from nvim to UiBridge

NvimView/NvimServer/server_shared_types.h

@@ -31,6 +31,7 @@ typedef CF_ENUM(NSInteger, NvimServerMsgId) {
   NvimServerMsgIdBusyStart,
   NvimServerMsgIdBusyStop,
   NvimServerMsgIdModeChange,
+  NvimServerMsgIdModeInfoSet,
   NvimServerMsgIdBell,
   NvimServerMsgIdVisualBell,
   NvimServerMsgIdFlush,

NvimView/NvimServer/server_ui_bridge.c

@@ -37,6 +37,7 @@ static msgpack_sbuffer flush_sbuffer;
 static msgpack_packer flush_packer;
 
 static void pack_flush_data(RenderDataType type, pack_block body);
+static void pack_mode_info_dictionary(msgpack_packer *packer, Dictionary dict);
 static void send_cwd(void);
 static void send_dirty_status(void);
 static void send_colorscheme(void);
@@ -107,9 +108,24 @@ static void server_ui_busy_stop(UI *ui __unused) {
 
 static void server_ui_mode_info_set(
     UI *ui __unused,
-    Boolean enabled __unused,
-    Array cursor_styles __unused
-) {}
+    Boolean enabled,
+    Array cursor_styles
+) {
+  send_msg_packing(NvimServerMsgIdModeInfoSet, ^(msgpack_packer *packer) {
+    msgpack_pack_array(packer, 2);
+    msgpack_pack_bool(packer, enabled);
+    msgpack_pack_array(packer, cursor_styles.size);
+    for (size_t i = 0; i < cursor_styles.size; ++i) {
+      Object item = cursor_styles.items[i];
+      if (item.type == kObjectTypeDictionary) {
+        pack_mode_info_dictionary(packer, item.data.dictionary);
+      } else {
+        // this should never happen, but write nil to match the given array size
+        msgpack_pack_nil(packer);
+      }
+    }
+  });
+}
 
 static void server_ui_mode_change(UI *ui __unused, String mode_str __unused, Integer mode) {
   send_msg_packing(NvimServerMsgIdModeChange, ^(msgpack_packer *packer) {
@@ -368,6 +384,34 @@ static void pack_flush_data(RenderDataType type, pack_block body) {
   body(&flush_packer);
 }
 
+// Small utility to pack an nvim Dictionary into a msgpack_map for mode_info_set
+// BEWARE: This is by no means a generic Dict -> map packer, as only String and
+// Integer values are supported for now.
+static void pack_mode_info_dictionary(
+    msgpack_packer *packer,
+    Dictionary dict
+) {
+  msgpack_pack_map(packer, dict.size);
+  for (size_t i = 0; i < dict.size; ++i) {
+    String key = dict.items[i].key;
+    Object value = dict.items[i].value;
+    msgpack_pack_str(packer, key.size);
+    msgpack_pack_str_body(packer, key.data, key.size);
+    switch (value.type) {
+      case kObjectTypeInteger:
+        msgpack_pack_int64(packer, value.data.integer);
+        break;
+      case kObjectTypeString:
+        msgpack_pack_str(packer, value.data.string.size);
+        msgpack_pack_str_body(packer, value.data.string.data, value.data.string.size);
+        break;
+      default:
+        msgpack_pack_nil(packer);
+        break;
+    }
+  }
+}
+
 static void send_dirty_status() {
   const bool new_dirty_status = has_dirty_docs();
   if (are_buffers_dirty == new_dirty_status) {return;}

NvimView/NvimView/NvimView+UiBridge.swift

@@ -62,6 +62,10 @@ extension NvimView {
     }
   }
 
+  final func modeInfoSet(_ value: MessagePackValue) {
+    self.bridgeLogger.trace("modeInfoSet: \(value)")
+  }
+
   final func flush(_ renderData: [MessagePackValue]) {
     self.bridgeLogger.trace("# of render data: \(renderData.count)")
 

NvimView/NvimView/SharedTypes.h

@@ -31,6 +31,7 @@ typedef CF_ENUM(NSInteger, NvimServerMsgId) {
   NvimServerMsgIdBusyStart,
   NvimServerMsgIdBusyStop,
   NvimServerMsgIdModeChange,
+  NvimServerMsgIdModeInfoSet,
   NvimServerMsgIdBell,
   NvimServerMsgIdVisualBell,
   NvimServerMsgIdFlush,

NvimView/NvimView/UiBridge.swift

@@ -14,6 +14,7 @@ protocol UiBridgeConsumer: class {
   func resize(_ value: MessagePackValue)
   func clear()
   func modeChange(_ value: MessagePackValue)
+  func modeInfoSet(_ value: MessagePackValue)
   func flush(_ renderData: [MessagePackValue])
   func setTitle(with value: MessagePackValue)
   func stop()
@@ -186,6 +187,10 @@ class UiBridge {
       guard let v = MessagePackUtils.value(from: data) else { return }
       self.consumer?.modeChange(v)
 
+    case .modeInfoSet:
+      guard let v = MessagePackUtils.value(from: data) else { return }
+      self.consumer?.modeInfoSet(v)
+
     case .bell:
       self.consumer?.bell()