Add API: SetPreeditCallback

This is for GLFW3 Preedit Callback: glfwSetPreeditCallback

Author: daipom

src/platforms/rcore_desktop_glfw.c

@@ -118,6 +118,7 @@ static void WindowContentScaleCallback(GLFWwindow *window, float scalex, float s
 // Input callbacks events
 static void KeyCallback(GLFWwindow *window, int key, int scancode, int action, int mods);  // GLFW3 Keyboard Callback, runs on key pressed
 static void CharCallback(GLFWwindow *window, unsigned int codepoint);                      // GLFW3 Char Callback, runs on key pressed (get codepoint value)
+static void PreeditCallbackInner(GLFWwindow *window, int preeditLength, unsigned int *preeditString, int blockCount, int *blockSizes, int focusedBlock, int caret); // GLFW3 Preedit Callback
 static void MouseButtonCallback(GLFWwindow *window, int button, int action, int mods);     // GLFW3 Mouse Button Callback, runs on mouse button pressed
 static void MouseCursorPosCallback(GLFWwindow *window, double x, double y);                // GLFW3 Cursor Position Callback, runs on mouse move
 static void MouseScrollCallback(GLFWwindow *window, double xoffset, double yoffset);       // GLFW3 Scrolling Callback, runs on mouse wheel
@@ -1598,6 +1599,7 @@ int InitPlatform(void)
     // Set input callback events
     glfwSetKeyCallback(platform.handle, KeyCallback);
     glfwSetCharCallback(platform.handle, CharCallback);
+    glfwSetPreeditCallback(platform.handle, PreeditCallbackInner);
     glfwSetMouseButtonCallback(platform.handle, MouseButtonCallback);
     glfwSetCursorPosCallback(platform.handle, MouseCursorPosCallback);   // Track mouse position changes
     glfwSetScrollCallback(platform.handle, MouseScrollCallback);
@@ -1782,6 +1784,13 @@ static void CharCallback(GLFWwindow *window, unsigned int codepoint)
     }
 }
 
+// GLFW3 Preedit Callback
+static void PreeditCallbackInner(GLFWwindow *window, int preeditLength, unsigned int *preeditString, int blockCount, int *blockSizes, int focusedBlock, int caret)
+{
+    if (!CORE.Input.Keyboard.preeditCallback) return;
+    CORE.Input.Keyboard.preeditCallback(preeditLength, (int *)preeditString, blockCount, blockSizes, focusedBlock, caret);
+}
+
 // GLFW3 Mouse Button Callback, runs on mouse button pressed
 static void MouseButtonCallback(GLFWwindow *window, int button, int action, int mods)
 {

src/platforms/rcore_web.c

@@ -122,6 +122,7 @@ static void WindowContentScaleCallback(GLFWwindow *window, float scalex, float s
 // Input callbacks events
 static void KeyCallback(GLFWwindow *window, int key, int scancode, int action, int mods); // GLFW3 Keyboard Callback, runs on key pressed
 static void CharCallback(GLFWwindow *window, unsigned int key);                           // GLFW3 Char Key Callback, runs on key pressed (get char value)
+static void PreeditCallbackInner(GLFWwindow *window, int preeditLength, unsigned int *preeditString, int blockCount, int *blockSizes, int focusedBlock, int caret); // GLFW3 Preedit Callback
 static void MouseButtonCallback(GLFWwindow *window, int button, int action, int mods);    // GLFW3 Mouse Button Callback, runs on mouse button pressed
 static void MouseCursorPosCallback(GLFWwindow *window, double x, double y);               // GLFW3 Cursor Position Callback, runs on mouse move
 static void MouseScrollCallback(GLFWwindow *window, double xoffset, double yoffset);      // GLFW3 Srolling Callback, runs on mouse wheel
@@ -1219,6 +1220,7 @@ int InitPlatform(void)
     // Set input callback events
     glfwSetKeyCallback(platform.handle, KeyCallback);
     glfwSetCharCallback(platform.handle, CharCallback);
+    glfwSetPreeditCallback(platform.handle, PreeditCallbackInner);
     glfwSetMouseButtonCallback(platform.handle, MouseButtonCallback);
     glfwSetCursorPosCallback(platform.handle, MouseCursorPosCallback); // Track mouse position changes
     glfwSetScrollCallback(platform.handle, MouseScrollCallback);
@@ -1453,6 +1455,13 @@ static void CharCallback(GLFWwindow *window, unsigned int key)
     }
 }
 
+// GLFW3 Preedit Callback
+static void PreeditCallbackInner(GLFWwindow *window, int preeditLength, unsigned int *preeditString, int blockCount, int *blockSizes, int focusedBlock, int caret)
+{
+    if (!CORE.Input.Keyboard.preeditCallback) return;
+    CORE.Input.Keyboard.preeditCallback(preeditLength, (int *)preeditString, blockCount, blockSizes, focusedBlock, caret);
+}
+
 // GLFW3 Mouse Button Callback, runs on mouse button pressed
 static void MouseButtonCallback(GLFWwindow *window, int button, int action, int mods)
 {

src/raylib.h

@@ -1152,6 +1152,14 @@ RLAPI void PlayAutomationEvent(AutomationEvent event);
 //------------------------------------------------------------------------------------
 // Input Handling Functions (Module: core)
 //------------------------------------------------------------------------------------
+// Callback for preedit text.
+// preeditLength: The length of preedit text
+// preeditString: The preedit text (unicode)
+// blockCount: The number of all converting blocks
+// blockSizes: The size of each converting block
+// focusedBlock: The index of the current converting block
+// caret: The index of the caret in preeditString
+typedef void (*PreeditCallback)(int preeditLength, int *preeditString, int blockCount, int *blockSizes, int focusedBlock, int caret);
 
 // Input-related functions: keyboard
 RLAPI bool IsKeyPressed(int key);                             // Check if a key has been pressed once
@@ -1162,6 +1170,7 @@ RLAPI bool IsKeyUp(int key);                                  // Check if a key
 RLAPI int GetKeyPressed(void);                                // Get key pressed (keycode), call it multiple times for keys queued, returns 0 when the queue is empty
 RLAPI int GetCharPressed(void);                               // Get char pressed (unicode), call it multiple times for chars queued, returns 0 when the queue is empty
 RLAPI void SetExitKey(int key);                               // Set a custom key to exit program (default is ESC)
+RLAPI void SetPreeditCallback(PreeditCallback callback);      // Set a callback for preedit
 
 // Input-related functions: gamepads
 RLAPI bool IsGamepadAvailable(int gamepad);                                        // Check if a gamepad is available

src/rcore.c

@@ -306,6 +306,8 @@ typedef struct CoreData {
             int charPressedQueue[MAX_CHAR_PRESSED_QUEUE];   // Input characters queue (unicode)
             int charPressedQueueCount;      // Input characters queue count
 
+            PreeditCallback preeditCallback; // Preedit callback
+
         } Keyboard;
         struct {
             Vector2 offset;                 // Mouse offset
@@ -2863,6 +2865,12 @@ int GetCharPressed(void)
     return value;
 }
 
+// Set a callback for preedit
+void SetPreeditCallback(PreeditCallback callback)
+{
+    CORE.Input.Keyboard.preeditCallback = callback;
+}
+
 // Set a custom key to exit program
 // NOTE: default exitKey is set to ESCAPE
 void SetExitKey(int key)