First completion level is working (LSP connected)

include/data.h

@@ -5,8 +5,12 @@
 #include <termios.h>
 #include <time.h>
 
+#include "define.h"
+
 #include "lisp.h"
 
+typedef struct lsp_client_t LspClient;
+
 /**
  * \struct row_t
  * \brief Store one editor row
@@ -94,15 +98,98 @@ struct keyBind_t {
   Lisp command;
 };
 
+// In data.h — add these
+
+#include <pthread.h>
+
+#define LSP_MAX_PENDING 64
+
+typedef enum {
+  LSP_NOT_STARTED = 0,
+  LSP_INITIALIZING,
+  LSP_READY,
+  LSP_SHUTDOWN,
+} LspState;
+
+typedef struct {
+  int      id;
+  void   (*callback)(struct lsp_client_t *lsp, const char *json);
+} LspPending;
+
+typedef struct lsp_client_t {
+  // ── Process ───────────────────────────────────────────────────────────────
+  pid_t            pid;
+  int              write_fd;
+  int              read_fd;
+  int completion_just_arrived;
+  int completion_requested;
+
+
+
+  int               wake_pipe[2];   // [0] = read end (main loop), [1] = write end (reader thread)
+
+
+  // ── State ─────────────────────────────────────────────────────────────────
+  LspState         state;
+  int              next_id;
+
+  // ── Pending requests ──────────────────────────────────────────────────────
+  LspPending       pending[LSP_MAX_PENDING];
+  int              pending_count;
+
+  // ── Threading ─────────────────────────────────────────────────────────────
+  pthread_t        reader_thread;
+  pthread_mutex_t  lock;
+  pthread_cond_t   ready_cond;      // signaled when state → LSP_READY
+
+  // ── Completion context ────────────────────────────────────────────────────
+  int              completion_cursor_x;   // screen position when
+  int              completion_cursor_y;   // completion was requested
+} LspClient;
+
+typedef struct {
+  char label[128];     // display text  e.g. "printf"
+  char detail[64];     // type/sig hint e.g. "int (const char *, ...)"
+  int  kind;           // LSP CompletionItemKind (1=Text,2=Method,3=Function…)
+} CompletionItem;
+
+typedef struct {
+  CompletionItem items[COMPLETION_MAX_ITEMS];
+  int            count;
+  int            selected;   // currently highlighted row
+  int            visible;    // is the popup shown?
+  int            origin_x;   // screen col where popup appears
+  int            origin_y;   // screen row where popup appears
+} CompletionPopup;
+
+typedef enum { DIAG_ERROR = 1, DIAG_WARNING, DIAG_HINT } DiagSeverity;
+
+typedef struct {
+  int          buffer_id;
+  int          line;        // 0-based
+  int          col_start;   // 0-based
+  int          col_end;
+  DiagSeverity severity;
+  char         message[256];
+} Diagnostic;
+
+typedef struct {
+  Diagnostic entries[DIAG_MAX];
+  int        count;
+} DiagnosticList;
+
 enum buffer_type { FILE_BUFF, TERMINAL_BUFF };
 
 struct buffer_t {
   enum buffer_type type;
   int buffer_id;
+  int b_lsp_open;
   int x, y; /**< Position in the file */
   row_t *row;
   int numrows;
+  int b_has_changed;
   char *filename;
+  char *path;
   enum bufferStatus_e state;
   int dirty;             /**< Has this buffer been modified since last save */
 };
@@ -122,6 +209,10 @@ struct editorConfig {
 
   ContextBuffer* context_buffers;
 
+  LspClient *lsp_client;
+  CompletionPopup  lsp_completion;
+  DiagnosticList   lsp_diagnostics;
+
   int dirty;
 
   char *status_msg;