[client] more cleanup and added alerts for new events

client/src/app.c

@@ -0,0 +1,75 @@
+/*
+Looking Glass - KVM FrameRelay (KVMFR) Client
+Copyright (C) 2017-2019 Geoffrey McRae <geoff@hostfission.com>
+https://looking-glass.hostfission.com
+
+This program is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free Software
+Foundation; either version 2 of the License, or (at your option) any later
+version.
+
+This program is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+PARTICULAR PURPOSE. See the GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License along with
+this program; if not, write to the Free Software Foundation, Inc., 59 Temple
+Place, Suite 330, Boston, MA 02111-1307 USA
+*/
+
+#include "main.h"
+#include "debug.h"
+#include <stdarg.h>
+
+void app_alert(LG_MsgAlert type, const char * fmt, ...)
+{
+  if (!state.lgr || params.disableAlerts)
+    return;
+
+  va_list args;
+  va_start(args, fmt);
+  const int length = vsnprintf(NULL, 0, fmt, args);
+  va_end(args);
+
+  char *buffer = malloc(length + 1);
+  va_start(args, fmt);
+  vsnprintf(buffer, length + 1, fmt, args);
+  va_end(args);
+
+  state.lgr->on_alert(
+    state.lgrData,
+    type,
+    buffer,
+    NULL
+  );
+
+  free(buffer);
+}
+
+KeybindHandle app_register_keybind(SDL_Scancode key, SuperEventFn callback, void * opaque)
+{
+  // don't allow duplicate binds
+  if (state.bindings[key])
+  {
+    DEBUG_INFO("Key already bound");
+    return NULL;
+  }
+
+  KeybindHandle handle = (KeybindHandle)malloc(sizeof(struct KeybindHandle));
+  handle->key      = key;
+  handle->callback = callback;
+  handle->opaque   = opaque;
+
+  state.bindings[key] = handle;
+  return handle;
+}
+
+void app_release_keybind(KeybindHandle * handle)
+{
+  if (!handle)
+    return;
+
+  state.bindings[(*handle)->key] = NULL;
+  free(*handle);
+  *handle = NULL;
+}