From 7bff57c6fa29285eae2b5515e9b7cbf8dc8214e6 Mon Sep 17 00:00:00 2001
From: Raimon Zamora <jaildoctor@gmail.com>
Date: Fri, 20 Jun 2025 13:49:59 +0200
Subject: [PATCH] - [NEW] mouse.discard()

---
 lua.cpp            |  6 ++++++
 mini.cpp           | 11 ++++++++++-
 mini.h             |  1 +
 vscode/library.lua |  3 +++
 4 files changed, 20 insertions(+), 1 deletion(-)

diff --git a/lua.cpp b/lua.cpp
index 4dfadf7..d091504 100644
--- a/lua.cpp
+++ b/lua.cpp
@@ -777,6 +777,11 @@ extern "C" {
         return 1;
     }
 
+    static int cpp_mouse_discard(lua_State *L) {
+        mdiscard();
+        return 0;
+    }
+
     
     // key
     // ===============================================
@@ -949,6 +954,7 @@ void push_lua_funcs() {
     lua_pushcfunction(L,cpp_mouse_wheel);           lua_setfield(L, -2, "wheel");
     lua_pushcfunction(L,cpp_mouse_down);            lua_setfield(L, -2, "down");
     lua_pushcfunction(L,cpp_mouse_press);           lua_setfield(L, -2, "press");
+    lua_pushcfunction(L,cpp_mouse_discard);         lua_setfield(L, -2, "discard");
 
     lua_pushinteger(L, 1);                          lua_setfield(L, -2, "LEFT");
     lua_pushinteger(L, 2);                          lua_setfield(L, -2, "MIDDLE");
diff --git a/mini.cpp b/mini.cpp
index 3ce8662..f716870 100644
--- a/mini.cpp
+++ b/mini.cpp
@@ -103,6 +103,7 @@ Uint8 key_just_pressed = 0;
 int mouse_x, mouse_y, mouse_wheel;
 Uint32 mouse_buttons;
 uint8_t mouse_just_pressed = 0;
+bool mouse_discard = false;
 
 SDL_Gamepad *gamepad = NULL;
 int8_t pad_just_pressed = SDL_GAMEPAD_BUTTON_INVALID;
@@ -484,7 +485,10 @@ int main(int argc,char*argv[]){
 #endif
                 }
                 if (mini_eve.type == SDL_EVENT_MOUSE_BUTTON_UP) {
-                    mouse_just_pressed = mini_eve.button.button;
+                    if (mouse_discard)
+                        mouse_discard = false;
+                    else
+                        mouse_just_pressed = mini_eve.button.button;
                 }
                 if (mini_eve.type == SDL_EVENT_MOUSE_WHEEL) {
                     mouse_wheel = mini_eve.wheel.y;
@@ -1188,6 +1192,7 @@ int mwheel() {
 }
 
 bool mbtn(uint8_t i) {
+    if (mouse_discard) return false;
     return mouse_buttons & SDL_BUTTON_MASK(i);
 }
 
@@ -1195,6 +1200,10 @@ bool mbtnp(uint8_t i) {
     return mouse_just_pressed == i;
 }
 
+void mdiscard() {
+    mouse_discard = true;
+}
+
 float time() {
     return float(SDL_GetTicks())/1000.0f;
 }
diff --git a/mini.h b/mini.h
index 0e716bd..4a15927 100644
--- a/mini.h
+++ b/mini.h
@@ -219,6 +219,7 @@ int mousey();
 int mwheel();
 bool mbtn(uint8_t i);
 bool mbtnp(uint8_t i);
+void mdiscard();
 
 float time();
 bool beat(int16_t i);
diff --git a/vscode/library.lua b/vscode/library.lua
index ed94a02..d16536b 100644
--- a/vscode/library.lua
+++ b/vscode/library.lua
@@ -459,6 +459,9 @@ function mouse.down(btn) end
 ---Returns whether the specified mouse button has just been pressed
 function mouse.press(btn) end
 
+---Ignores current down button, effectively not raising the next "press" event
+function mouse.discard() end
+
 mouse.LEFT = 1
 mouse.MIDDLE = 2
 mouse.RIGHT = 3