passthrough glfw events to previous callback if exists

1 files changed, 37 insertions, 6 deletions

diff --git a/src/player-input.cpp b/src/player-input.cpp
index ead67ca..4b34fdd 100644
--- a/src/player-input.cpp
+++ b/src/player-input.cpp
@@ -3,6 +3,13 @@
 #include "window.hpp"
 #include "game-settings.hpp"
 
+GLFWcursorenterfun prevCursorEnterCallback;
+GLFWcursorposfun prevCursorPosCallback;
+GLFWkeyfun prevKeyCallback;
+GLFWmousebuttonfun prevMouseButtonCallback;
+GLFWscrollfun prevScrollCallback;
+GLFWwindowfocusfun prevWindowFocusCallback;
+
 TypeSafeInt_B(InputEventHash);
 TypeSafeInt_B(InputEventType);
 TypeSafeInt_B(InputCursorEntered);
@@ -27,6 +34,9 @@ void CursorEnterCallback(GLFWwindow *window, int entered) {
 	ev.button = 0;
 	ev.scanCode = 0;
 	ev.mods = 0;
+	if (prevCursorEnterCallback) {
+		prevCursorEnterCallback(window, entered);
+	}
 }
 
 void CursorPosCallback(GLFWwindow *window, double xPos, double yPos) {
@@ -42,6 +52,9 @@ void CursorPosCallback(GLFWwindow *window, double xPos, double yPos) {
 	ev.button = 0;
 	ev.scanCode = 0;
 	ev.mods = 0;
+	if (prevCursorPosCallback) {
+		prevCursorPosCallback(window, xPos, yPos);
+	}
 }
 
 void KeyCallback(GLFWwindow *window, int key, int scancode, int action, int mods) {
@@ -57,6 +70,9 @@ void KeyCallback(GLFWwindow *window, int key, int scancode, int action, int mods
 	ev.button = key;
 	ev.scanCode = scancode;
 	ev.mods = mods;
+	if (prevKeyCallback) {
+		prevKeyCallback(window, key, scancode, action, mods);
+	}
 }
 
 void MouseButtonCallback(GLFWwindow *window, int button, int action, int mods) {
@@ -72,6 +88,9 @@ void MouseButtonCallback(GLFWwindow *window, int button, int action, int mods) {
 	ev.button = button;
 	ev.scanCode = 0;
 	ev.mods = mods;
+	if (prevMouseButtonCallback) {
+		prevMouseButtonCallback(window, button, action, mods);
+	}
 }
 
 void ScrollCallback(GLFWwindow *window, double xOffset, double yOffset) {
@@ -87,6 +106,9 @@ void ScrollCallback(GLFWwindow *window, double xOffset, double yOffset) {
 	ev.button = 0;
 	ev.scanCode = 0;
 	ev.mods = 0;
+	if (prevScrollCallback) {
+		prevScrollCallback(window, xOffset, yOffset);
+	}
 }
 
 void WindowFocusCallback(GLFWwindow *window, int focused) {
@@ -102,18 +124,27 @@ void WindowFocusCallback(GLFWwindow *window, int focused) {
 	ev.button = 0;
 	ev.scanCode = 0;
 	ev.mods = 0;
+	if (prevWindowFocusCallback) {
+		prevWindowFocusCallback(window, focused);
+	}
 }
 
 void PkeInput_Init() {
-	glfwSetCursorEnterCallback(window, CursorEnterCallback);
-	glfwSetCursorPosCallback(window, CursorPosCallback);
-	glfwSetKeyCallback(window, KeyCallback);
-	glfwSetMouseButtonCallback(window, MouseButtonCallback);
-	glfwSetScrollCallback(window, ScrollCallback);
-	glfwSetWindowFocusCallback(window, WindowFocusCallback);
+	prevCursorEnterCallback = glfwSetCursorEnterCallback(window, CursorEnterCallback);
+	prevCursorPosCallback = glfwSetCursorPosCallback(window, CursorPosCallback);
+	prevKeyCallback = glfwSetKeyCallback(window, KeyCallback);
+	prevMouseButtonCallback = glfwSetMouseButtonCallback(window, MouseButtonCallback);
+	prevScrollCallback = glfwSetScrollCallback(window, ScrollCallback);
+	prevWindowFocusCallback = glfwSetWindowFocusCallback(window, WindowFocusCallback);
 }
 
 void PkeInput_Teardown() {
 	UnhandledPkeInputEvents.~DynArray();
+	if (prevWindowFocusCallback) { glfwSetWindowFocusCallback(window, prevWindowFocusCallback); }
+	if (prevScrollCallback) { glfwSetScrollCallback(window, prevScrollCallback); }
+	if (prevMouseButtonCallback) { glfwSetMouseButtonCallback(window, prevMouseButtonCallback); }
+	if (prevKeyCallback) { glfwSetKeyCallback(window, prevKeyCallback); }
+	if (prevCursorPosCallback) { glfwSetCursorPosCallback(window, prevCursorPosCallback); }
+	if (prevCursorEnterCallback) { glfwSetCursorEnterCallback(window, prevCursorEnterCallback); }
 }