ecore_win32: fix compose event field

Summary:
compose event field was encoded in UTF-16 and not UTF-8. Also string
event field was not correctly defined and was generating eina error
messages

Test Plan: running a test

Reviewers: raster, cedric, zmike

Reviewed By: raster

Subscribers: #reviewers, #committers

Tags: #efl

Differential Revision: https://phab.enlightenment.org/D10753

src/lib/ecore_win32/ecore_win32_event.c

@@ -42,6 +42,32 @@ static Ecore_Win32_Key_Mask _ecore_win32_key_mask = 0;
 static Eina_Bool            _ecore_win32_ctrl_fake = EINA_FALSE;
 static Eina_Bool            _ecore_win32_clipboard_has_data = EINA_FALSE;
 
+static char *
+_ecore_win32_utf16_to_utf8(const wchar_t *text)
+{
+   char *res;
+   int size;
+
+   /* text is used as an array, hence never NULL */
+
+   size = WideCharToMultiByte(CP_UTF8, 0, text, -1, NULL, 0, NULL, NULL);
+   if (size == 0)
+     return NULL;
+
+   res = (char *)malloc(size * sizeof(char));
+   if (!res)
+     return NULL;
+
+   size = WideCharToMultiByte(CP_UTF8, 0, text, -1, res, size, NULL, NULL);
+   if (size == 0)
+     {
+        free(res);
+        return NULL;
+     }
+
+   return res;
+}
+
 static unsigned int
 _ecore_win32_modifiers_get(void)
 {
@@ -1176,15 +1202,14 @@ _ecore_win32_event_keystroke_get(Ecore_Win32_Callback_Data *msg,
            if (res == -1)
              {
                 /* dead key, but managed like normal key */
+                compose = _ecore_win32_utf16_to_utf8(buf);
              }
            else if (res == 0)
              {
                 INF("No translatable character found, skipping");
                 if (msg->window_param >= 0x30 && msg->window_param <= 0x39)
-                  {
-                     buf[0] = msg->window_param;
-                  }
-                else  return NULL;
+                  compose = _ecore_win32_utf16_to_utf8(buf);
+                /* otherwise, compose is NULL */
              }
            else if (res >= 2)
              {
@@ -1196,12 +1221,12 @@ _ecore_win32_event_keystroke_get(Ecore_Win32_Callback_Data *msg,
                 res = ToUnicode(msg->window_param,
                                 MapVirtualKey(msg->window_param, MAPVK_VK_TO_CHAR),
                                 kbd_state, buf, 4, 0);
-                if ((res != 1) && (res != -1))
-                  return NULL;
+                if (!((res != 1) && (res != -1)))
+                  compose = _ecore_win32_utf16_to_utf8(buf);
+                /* otherwise, compose is NULL */
              }
-
-           string[0] = (char)buf[0];
-           compose = string;
+           else /* res == 1 : 1 char written to buf */
+             compose = _ecore_win32_utf16_to_utf8(buf);
 
            /*** key field ***/
 
@@ -1232,7 +1257,6 @@ _ecore_win32_event_keystroke_get(Ecore_Win32_Callback_Data *msg,
                   {
                      buf[0] = msg->window_param;
                   }
-                else  return NULL;
              }
            else if (res >= 2)
              {
@@ -1303,7 +1327,7 @@ _ecore_win32_event_keystroke_get(Ecore_Win32_Callback_Data *msg,
                   {
                      buf[0] = msg->window_param;
                   }
-                else  return NULL;
+                else buf[0] = 0;// return NULL;
              }
            else if (res >= 2)
              {
@@ -1353,7 +1377,7 @@ _ecore_win32_event_keystroke_get(Ecore_Win32_Callback_Data *msg,
    e = (Ecore_Event_Key *)calloc(1, sizeof(Ecore_Event_Key) +
                                  strlen(keyname) + 1 +
                                  strlen(key) + 1 +
-                                 (compose ? (strlen(compose) + 1) : 0));
+                                 (compose ? strlen(compose) : 0) + 1);
    if (!e)
      return NULL;
 
@@ -1366,7 +1390,12 @@ _ecore_win32_event_keystroke_get(Ecore_Win32_Callback_Data *msg,
 
    memcpy((char *)e->keyname, keyname, strlen(keyname));
    memcpy((char *)e->key, key, strlen(key));
-   if (compose) memcpy((char *)e->compose, compose, strlen(compose));
+   if (compose)
+     {
+        memcpy((char *)e->compose, compose, strlen(compose));
+        free(compose);
+     }
+
 
    return e;
 }