From f23f6b9ea8204a63d17baa712db06aac1ea1c3ad Mon Sep 17 00:00:00 2001
From: _ov4 <ov4@ov4.org>
Date: Mon, 12 Oct 2026 07:15:46 +0000
Subject: add terminal window size update

---
 include/line/cursor.h          |  2 ++
 include/line/getter.h          |  2 ++
 include/line/mode.h            |  1 -
 include/signal_handler.h       |  1 +
 module-test/line_test.cc       | 14 +++++++++++++-
 src/line/cursor.cc             | 20 ++++++++++++++++++++
 src/line/mode.cc               |  3 +++
 src/signal/sigwinch_handler.cc | 13 +++++++++++++
 8 files changed, 54 insertions(+), 2 deletions(-)
 create mode 100644 src/signal/sigwinch_handler.cc

diff --git a/include/line/cursor.h b/include/line/cursor.h
index 71a3a4a..63d275c 100644
--- a/include/line/cursor.h
+++ b/include/line/cursor.h
@@ -42,5 +42,7 @@ void reset_editor();
 
 void cursor_skip_prompt();
 
+void check_window_update();
+
 }
 
diff --git a/include/line/getter.h b/include/line/getter.h
index 8a3ef7e..ac8683f 100644
--- a/include/line/getter.h
+++ b/include/line/getter.h
@@ -5,6 +5,8 @@
 namespace ov4
 {
 
+inline bool windows_size_changed;
+
 int get_terminal_pos_cursor();
 int get_buffer_index_display_begin();
 int get_buffer_index_display_end();
diff --git a/include/line/mode.h b/include/line/mode.h
index 6a4d14d..3d40cef 100644
--- a/include/line/mode.h
+++ b/include/line/mode.h
@@ -15,5 +15,4 @@ void disable_raw();
 void enable_raw();
 
 
-
 }
diff --git a/include/signal_handler.h b/include/signal_handler.h
index 12ab0a5..bc84744 100644
--- a/include/signal_handler.h
+++ b/include/signal_handler.h
@@ -25,6 +25,7 @@ void sigchld_handler(int sig);
 void sigint_handler(int sig);
 void sigtstp_handler(int sig);
 void sigquit_handler(int sig);
+void sigwinch_handler(int sig);
 
 int block_all(sigset_t *prev);
 int block_handler(sigset_t *prev);
diff --git a/module-test/line_test.cc b/module-test/line_test.cc
index 6a0ef00..bea6d82 100644
--- a/module-test/line_test.cc
+++ b/module-test/line_test.cc
@@ -9,9 +9,21 @@
    src/history.cc \
    src/path.cc \
    src/util/string.cc \
+   src/signal/misc.cc \
+   src/signal/sigwinch_handler.cc \
    -std=c++26 -Iinclude -Ithird_party/magic_enum/include \
    -O0 -ggdb3 -fno-omit-frame-pointer -fno-inline -D_GLIBCXX_ASSERTIONS \
-   -o module-test/line_test.out
+   -o module-test/line_test.out\
+   \
+   src/option.cc \
+   src/util/io.cc \
+   src/signal/sigint_handler.cc \
+   src/signal/sigtstp_handler.cc \
+   src/signal/sigchld_handler.cc \
+   src/signal/sigquit_handler.cc \
+   src/job.cc \
+   src/util/prompt.cc \
+   src/util/color.cc
  *
  */
 
diff --git a/src/line/cursor.cc b/src/line/cursor.cc
index 02e43cf..538dfca 100644
--- a/src/line/cursor.cc
+++ b/src/line/cursor.cc
@@ -21,6 +21,8 @@ namespace ov4
 
 void print_override(const std::string &s)
 {
+    check_window_update();
+    
     // save current cursor position
     // print("\x1b[s"); fflush(stdout);
     // WTF
@@ -43,6 +45,8 @@ void print_override(const std::string &s)
 
 void move_cursor(char c)
 {
+    check_window_update();
+
     switch (c)
     {
         case 'A':
@@ -64,6 +68,8 @@ void move_cursor(char c)
 
 void cursor_input_char(char c)
 {
+    check_window_update();
+
     // if receives any input
     // it should move to the latest history
     history_index = get_last_index();
@@ -97,6 +103,8 @@ void update_window_size()
 
 void move_cursor(T_cursor_movement_direction d)
 {
+    void check_window_update();
+
     switch (d)
     {
         case T_cursor_movement_direction::LEFT:
@@ -159,6 +167,8 @@ void move_cursor(T_cursor_movement_direction d)
 
 void switch_history(T_cursor_movement_direction d)
 {
+    check_window_update();
+
     switch (d)
     {
         case T_cursor_movement_direction::UP:
@@ -209,4 +219,14 @@ void cursor_skip_prompt()
     print("\r\x1b[{}C", prompt_pos-1); fflush(stdout);
 }
 
+void check_window_update()
+{
+    if (windows_size_changed)
+    {
+        update_window_size();
+        clear_below();
+        windows_size_changed = false;
+    }
+}
+
 }
diff --git a/src/line/mode.cc b/src/line/mode.cc
index 06f1727..208465b 100644
--- a/src/line/mode.cc
+++ b/src/line/mode.cc
@@ -8,6 +8,7 @@
 #include "line/cursor.h"
 #include "line/getter.h"
 #include "history.h"
+#include "signal_handler.h"
 
 using namespace std;
 
@@ -57,6 +58,8 @@ void enable_raw()
 
     atexit(disable_raw);
 
+    Signal(SIGWINCH, sigwinch_handler);
+
     // TCSAFLUSH
     // the change shall occur after all output written to fildes is transmitted
     // and all input so far received but not read shall be discarded before the change is made
diff --git a/src/signal/sigwinch_handler.cc b/src/signal/sigwinch_handler.cc
new file mode 100644
index 0000000..4b692ed
--- /dev/null
+++ b/src/signal/sigwinch_handler.cc
@@ -0,0 +1,13 @@
+#include "signal_handler.h"
+
+#include "line/getter.h"
+
+namespace ov4
+{
+
+void sigwinch_handler([[maybe_unused]] int sig)
+{
+    windows_size_changed = true;
+}
+
+}
\ No newline at end of file
-- 
cgit v1.3.1-4-g156e