More lsp support

This makes the LSP support complete for now:

- Completion
- Diagnostics
- Goto implementation/declaration
- Rename
- Documentation
- Find references

1 files changed, 61 insertions, 0 deletions

diff --git a/src/main/lsp/rename.c b/src/main/lsp/rename.c
new file mode 100644
index 0000000..6adc9a1
--- /dev/null
+++ b/src/main/lsp/rename.c
@@ -0,0 +1,61 @@
+#include "rename.h"
+
+#include "dged/buffer.h"
+#include "dged/buffer_view.h"
+#include "dged/minibuffer.h"
+#include "dged/window.h"
+
+#include "lsp.h"
+
+static void handle_rename_response(struct lsp_server *server,
+                                   struct lsp_response *response,
+                                   void *userdata) {
+  (void)userdata;
+  if (response->value.result.type == Json_Null) {
+    minibuffer_echo_timeout(4, "rename: no edits");
+    return;
+  }
+
+  struct workspace_edit edit =
+      workspace_edit_from_json(&response->value.result);
+  apply_edits(server, &edit);
+  workspace_edit_free(&edit);
+}
+
+void lsp_rename(struct lsp_server *server, struct buffer *buffer,
+                struct location location, struct s8 new_name) {
+  uint64_t id = new_pending_request(server, handle_rename_response, NULL);
+  struct versioned_text_document_identifier doc =
+      versioned_identifier_from_buffer(buffer);
+
+  struct rename_params params = {
+      .position.uri = doc.uri,
+      .position.position = location,
+      .new_name = new_name,
+  };
+
+  struct s8 json_payload = rename_params_to_json(&params);
+  lsp_send(lsp_backend(server),
+           lsp_create_request(id, s8("textDocument/rename"), json_payload));
+
+  versioned_text_document_identifier_free(&doc);
+  s8delete(json_payload);
+}
+
+int32_t lsp_rename_cmd(struct command_ctx ctx, int argc, const char **argv) {
+  if (argc == 0) {
+    return minibuffer_prompt(ctx, "rename to: ");
+  }
+
+  struct buffer_view *bv = window_buffer_view(ctx.active_window);
+  struct lsp_server *server = lsp_server_for_lang_id(bv->buffer->lang.id);
+  if (server == NULL) {
+    minibuffer_echo_timeout(4, "no lsp server associated with %s",
+                            bv->buffer->name);
+    return 0;
+  }
+
+  lsp_rename(server, bv->buffer, bv->dot, s8(argv[0]));
+
+  return 0;
+}