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/* Copyright (C) 2017 Wildfire Games.
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
/*
* SDL input redirector; dispatches to multiple handlers.
*/
#include "precompiled.h"
#include "input.h"
#include <stdio.h>
#include <stdlib.h>
#include "lib/external_libraries/libsdl.h"
const size_t MAX_HANDLERS = 9;
static InHandler handler_stack[MAX_HANDLERS];
static size_t handler_stack_top = 0;
static std::list<SDL_Event_> priority_events;
void in_add_handler(InHandler handler)
{
ENSURE(handler);
if(handler_stack_top >= MAX_HANDLERS)
WARN_IF_ERR(ERR::LIMIT);
handler_stack[handler_stack_top++] = handler;
}
void in_reset_handlers()
{
handler_stack_top = 0;
}
// send ev to each handler until one returns IN_HANDLED
void in_dispatch_event(const SDL_Event_* ev)
{
for(int i = (int)handler_stack_top-1; i >= 0; i--)
{
ENSURE(handler_stack[i] && ev);
InReaction ret = handler_stack[i](ev);
// .. done, return
if(ret == IN_HANDLED)
return;
// .. next handler
else if(ret == IN_PASS)
continue;
// .. invalid return value
else
DEBUG_WARN_ERR(ERR::LOGIC); // invalid handler return value
}
}
void in_push_priority_event(const SDL_Event_* event)
{
priority_events.push_back(*event);
}
int in_poll_priority_event(SDL_Event_* event)
{
if (priority_events.empty())
return 0;
*event = priority_events.front();
priority_events.pop_front();
return 1;
}
int in_poll_event(SDL_Event_* event)
{
return in_poll_priority_event(event) ? 1 : SDL_PollEvent(&event->ev);
}
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