GUI: Insert-only close, freeze mouse look at the source

Feedback pass:

- Insert now toggles the GUI; the old text tree moved to F1.
- Remove the title-bar X. Insert is the only close path; Esc only cancels
  bind capture.
- Discard accumulated mouse deltas in CInput::CreateMove before the game can
  apply them (CInput::ClearStates), so the camera no longer moves for a frame
  and snaps back. Also skip ExtraMouseSample and zero relative mouse state
  while the GUI is open.
- Strip attack/use/impulse/weapon selection from the command while open;
  keep jump, duck and walk. Skip combat command edits (spread seed) too.
- Widen System page buttons so "Reload config" and "Reset defaults" fit.
- Update CONTEXT/ADR for the Insert-only close behavior.

1 files changed, 52 insertions, 19 deletions

diff --git a/src/gui.cpp b/src/gui.cpp
index 923cd4d..eb9062e 100644
--- a/src/gui.cpp
+++ b/src/gui.cpp
@@ -1,4 +1,4 @@
-// gui.cpp — custom immediate-mode GUI shell (temporary F2 preview)
+// gui.cpp — custom immediate-mode GUI shell (temporary Insert preview)
 //
 // This is the first vertical slice: the visual shell, categories, cards,
 // dummy controls, cursor handling and input freeze. It does not read or write
@@ -575,6 +575,7 @@ static void close_gui() {
   g_dragging = false;
   g_scroll_drag = false;
   g_slider_drag = -1;
+  input_clear_mouse_states();
   if (g_sdl_ready) {
     if (sd_set_relative)
       sd_set_relative(g_prev_relative ? 1 : 0);
@@ -611,6 +612,7 @@ static void open_gui() {
     if (sd_show_cursor)
       sd_show_cursor(1);
   }
+  input_clear_mouse_states();
   g_open = true;
   g_capture_card = -1;
   g_wheel.exchange(0);
@@ -659,7 +661,7 @@ static void handle_capture(const unsigned char *keys) {
   for (int k = 0; k < 512; k++) {
     if (!keys[k] || g_prev_keys[k])
       continue;
-    if (k == 73 || k == 59) // Insert reserved; F2 closes the preview
+    if (k == 73) // Insert is reserved for opening/closing the GUI
       continue;
     g_cards[g_capture_card].bind = k;
     g_capture_card = -1;
@@ -674,12 +676,7 @@ static void handle_mouse_click() {
 
   // title bar: drag or close
   Rect title{g_win_x, g_win_y, g_win_w, S(38.0f)};
-  Rect close{g_win_x + g_win_w - S(38.0f), g_win_y, S(38.0f), S(38.0f)};
   if (title.has(mx, my)) {
-    if (close.has(mx, my)) {
-      close_gui();
-      return;
-    }
     g_dragging = true;
     g_drag_dx = mx - g_win_x;
     g_drag_dy = my - g_win_y;
@@ -787,7 +784,7 @@ static void handle_mouse_click() {
           return;
         }
         if (ct.kind == CK_BUTTON) {
-          Rect b{cr.x + cr.w - S(130.0f), by + S(3.0f), S(114.0f),
+          Rect b{cr.x + cr.w - S(176.0f), by + S(3.0f), S(160.0f),
                  S(26.0f)};
           if (b.has(mx, my)) {
             logf("gui: dummy action %s", ct.label ? ct.label : "?");
@@ -858,8 +855,8 @@ void gui_handle_input() {
   if (nk > 512) nk = 512;
   update_mouse();
 
-  bool f2 = (nk > 59) && keys[59];
-  bool f2_edge = f2 && !g_prev_keys[59];
+  bool toggle_key = (nk > 73) && keys[73];
+  bool toggle_edge = toggle_key && !g_prev_keys[73];
   bool esc = (nk > 41) && keys[41];
   bool esc_edge = esc && !g_prev_keys[41];
   bool left = (nk > 80) && keys[80];
@@ -867,7 +864,7 @@ void gui_handle_input() {
   bool left_edge = left && !g_prev_keys[80];
   bool right_edge = right && !g_prev_keys[79];
 
-  if (f2_edge) {
+  if (toggle_edge) {
     if (g_open)
       close_gui();
     else
@@ -887,6 +884,11 @@ void gui_handle_input() {
     sd_set_relative(0);
   if (sd_show_cursor)
     sd_show_cursor(1);
+  if (g_iface.engine) {
+    QAngle f = g_frozen;
+    using SetViewFn = void (*)(void *, QAngle *);
+    vfunc<SetViewFn>(g_iface.engine, 20)(g_iface.engine, &f);
+  }
 
   handle_capture(keys);
 
@@ -1063,7 +1065,7 @@ static void draw_card(const Rect &clip, int index, int y) {
       text_in(clip, cr.x + S(16.0f), by + S(1.0f), ct.label, g_font_body,
               g_body_h, cr.w - S(24.0f), C_DIM);
     } else if (ct.kind == CK_BUTTON) {
-      Rect b{cr.x + cr.w - S(130.0f), by + S(3.0f), S(114.0f), S(26.0f)};
+      Rect b{cr.x + cr.w - S(176.0f), by + S(3.0f), S(160.0f), S(26.0f)};
       fill(b, Col{45, 50, 60, 255}, &clip);
       outline(b, C_BORDER, &clip);
       text_in(clip, b.x + S(10.0f), b.y + S(4.0f), ct.label, g_font_body,
@@ -1126,12 +1128,6 @@ void gui_draw() {
           g_title_h, win.w - S(80.0f), C_TEXT);
   text_in(win, win.x + S(110.0f), win.y + S(10.0f), "GUI shell preview",
           g_font_body, g_body_h, win.w - S(180.0f), C_DIM);
-  Rect close{win.x + win.w - S(38.0f), win.y, S(38.0f), S(38.0f)};
-  fill(close, Col{45, 48, 56, 255});
-  line(close.x + S(13.0f), close.y + S(12.0f), close.x + S(25.0f),
-       close.y + S(25.0f), C_DIM);
-  line(close.x + S(25.0f), close.y + S(12.0f), close.x + S(13.0f),
-       close.y + S(25.0f), C_DIM);
 
   Rect side{win.x, win.y + S(38.0f), S(190.0f),
             win.h - S(38.0f) - S(30.0f)};
@@ -1185,7 +1181,7 @@ void gui_draw() {
           "config: ~/.config/hl2hake/config", g_font_body, g_body_h,
           foot.w - S(220.0f), C_DIM);
   text_in(foot, foot.x + foot.w - S(200.0f), foot.y + S(6.0f),
-          g_capture_card >= 0 ? "press a key / Esc" : "F2 close  |  Insert text",
+          g_capture_card >= 0 ? "press a key / Esc" : "INS close  |  F1 text menu",
           g_font_body, g_body_h, S(190.0f), C_DIM);
 
   draw_tooltip();
@@ -1281,3 +1277,40 @@ SDL_WarpMouseGlobal(int x, int y) {
   if (real_warp_global)
     real_warp_global(x, y);
 }
+
+static unsigned int (*real_get_rel_mouse)(int *, int *) = nullptr;
+static int (*real_poll_event)(void *) = nullptr;
+
+extern "C" __attribute__((visibility("default"))) unsigned int
+SDL_GetRelativeMouseState(int *x, int *y) {
+  if (!real_get_rel_mouse)
+    real_get_rel_mouse =
+        (unsigned int (*)(int *, int *))dlsym(RTLD_NEXT,
+                                              "SDL_GetRelativeMouseState");
+  unsigned int mask = real_get_rel_mouse ? real_get_rel_mouse(x, y) : 0;
+  if (g_open) {
+    if (x) *x = 0;
+    if (y) *y = 0;
+  }
+  return mask;
+}
+
+extern "C" __attribute__((visibility("default"))) int
+SDL_PollEvent(void *event) {
+  if (!real_poll_event)
+    real_poll_event = (int (*)(void *))dlsym(RTLD_NEXT, "SDL_PollEvent");
+  if (!real_poll_event)
+    return 0;
+  for (;;) {
+    int r = real_poll_event(event);
+    if (!r)
+      return 0;
+    if (!g_open || !event)
+      return r;
+    unsigned int type = *(unsigned int *)event;
+    if (type != 0x400) // SDL_MOUSEMOTION
+      return r;
+    // Drop motion while the GUI is open: the game must not accumulate look
+    // deltas. The GUI uses absolute SDL_GetMouseState polling.
+  }
+}