/*
 * Copyright (C) 1997-2000, Michael Jennings
 *
 * 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 of the Software, its documentation and marketing & publicity
 * materials, and acknowledgment shall be given in the documentation, materials
 * and software packages that this Software was used.
 *
 * 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 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.
 */

static const char cvs_ident[] = "$Id$";

#include "config.h"
#include "feature.h"

#include <unistd.h>
#include <limits.h>

#include "startup.h"
#include "actions.h"
#include "command.h"
#include "e.h"
#include "events.h"
#include "menus.h"
#include "options.h"
#include "pixmap.h"
#include "screen.h"
#include "script.h"
#include "scrollbar.h"
#include "term.h"
#include "windows.h"

action_t *action_list = NULL;

unsigned char
action_handle_string(event_t *ev, action_t *action)
{
  USE_VAR(ev);
  REQUIRE_RVAL(action->param.string != NULL, 0);
  cmd_write((unsigned char *) action->param.string, strlen(action->param.string));
  return 1;
}

unsigned char
action_handle_echo(event_t *ev, action_t *action)
{
  USE_VAR(ev);
  REQUIRE_RVAL(action->param.string != NULL, 0);
  tt_write((unsigned char *) action->param.string, strlen(action->param.string));
  return 1;
}

unsigned char
action_handle_script(event_t *ev, action_t *action)
{
  USE_VAR(ev);
  REQUIRE_RVAL(action->param.script != NULL, 0);
  script_parse(action->param.script);
  return 1;
}

unsigned char
action_handle_menu(event_t *ev, action_t *action)
{
  REQUIRE_RVAL(action->param.menu != NULL, 0);
  menu_invoke(ev->xbutton.x, ev->xbutton.y, TermWin.parent, action->param.menu, ev->xbutton.time);
  return 1;
}

action_t *
action_find_match(unsigned short mod, unsigned char button, KeySym keysym)
{
  action_t *action;

  D_ACTIONS(("mod == 0x%08x, button == %d, keysym == 0x%08x\n", mod, button, keysym));
  for (action = action_list; action; action = action->next) {
    D_ACTIONS(("Checking action.  mod == 0x%08x, button == %d, keysym == 0x%08x\n", action->mod, action->button, action->keysym));
    if ((action->mod == mod) && (action->button == button) && (action->keysym == keysym)) {
      D_ACTIONS(("Match found at %8p\n", action));
      return action;
    }
  }
  return NULL;
}

unsigned char
action_dispatch(event_t *ev, KeySym keysym)
{
  action_t *action;
  unsigned int m = (AltMask | MetaMask | NumLockMask);

  ASSERT_RVAL(ev != NULL, 0);
  ASSERT_RVAL(ev->xany.type == ButtonPress || ev->xany.type == KeyPress, 0);
  D_ACTIONS(("Event %8p:  Button %d, Keysym 0x%08x, Key State 0x%08x\n", ev, ev->xbutton.button, keysym, ev->xkey.state));
  for (action = action_list; action; action = action->next) {
    D_ACTIONS(("Checking action.  mod == 0x%08x, button == %d, keysym == 0x%08x\n", action->mod, action->button, action->keysym));
    /* The very first thing we do is match the event type to the type
       of the current action.  This means that we'll only run through
       the modifier checks below if we absolutely have to. */
    if (ev->xany.type == ButtonPress) {
      /* The event we're looking at is a button press.  Make sure the
         current action is also, and that it matches.  Continue if not. */
      if ((action->button == BUTTON_NONE) || ((action->button != BUTTON_ANY) && (action->button != ev->xbutton.button))) {
        continue;
      }
    } else {
      /* The event we're looking at is a key press.  Make sure the
         current action is also, and that it matches.  Continue if not. */
      if (!(action->keysym) || (keysym != action->keysym)) {
        continue;
      }
    }
    D_ACTIONS(("Button/key passed.\n"));
    if (action->mod != MOD_ANY) {
      /* When we do have to check the modifiers, we do so in
         this order to eliminate the most popular choices first. */
      if (LOGICAL_XOR((action->mod & MOD_CTRL), (ev->xkey.state & ControlMask))) {
        continue;
      }
      if (LOGICAL_XOR((action->mod & MOD_SHIFT), (ev->xkey.state & ShiftMask))) {
        continue;
      }
      if (LOGICAL_XOR((action->mod & MOD_ALT), (ev->xkey.state & AltMask))) {
        continue;
      }
      if (LOGICAL_XOR((action->mod & MOD_META), (ev->xkey.state & MetaMask))) {
        continue;
      }
      if (LOGICAL_XOR((action->mod & MOD_LOCK), (ev->xkey.state & LockMask))) {
        continue;
      }
      if (((action->mod & MOD_MOD1) && !(ev->xkey.state & Mod1Mask)) || (!(action->mod & MOD_MOD1) && (ev->xkey.state & Mod1Mask) && !(Mod1Mask & m))) {
        continue;                                                                                                                                 
      }                                                                                                                                           
      if (((action->mod & MOD_MOD2) && !(ev->xkey.state & Mod2Mask)) || (!(action->mod & MOD_MOD2) && (ev->xkey.state & Mod2Mask) && !(Mod2Mask & m))) {
        continue;                                                                                                                                 
      }                                                                                                                                           
      if (((action->mod & MOD_MOD3) && !(ev->xkey.state & Mod3Mask)) || (!(action->mod & MOD_MOD3) && (ev->xkey.state & Mod3Mask) && !(Mod3Mask & m))) {
        continue;                                                                                                                                 
      }                                                                                                                                           
      if (((action->mod & MOD_MOD4) && !(ev->xkey.state & Mod4Mask)) || (!(action->mod & MOD_MOD4) && (ev->xkey.state & Mod4Mask) && !(Mod4Mask & m))) {
        continue;                                                                                                                                 
      }                                                                                                                                           
      if (((action->mod & MOD_MOD5) && !(ev->xkey.state & Mod5Mask)) || (!(action->mod & MOD_MOD5) && (ev->xkey.state & Mod5Mask) && !(Mod5Mask & m))) {
        continue;
      }
    }      
    D_ACTIONS(("Match found.\n"));
    /* If we've passed all the above tests, it's a match.  Dispatch the handler. */
    return ((action->handler)(ev, action));
  }
  return (0);
}

void
action_add(unsigned short mod, unsigned char button, KeySym keysym, action_type_t type, void *param) {

  action_t *action;

  if (!action_list || (action = action_find_match(mod, button, keysym)) == NULL) {
    action = (action_t *) MALLOC(sizeof(action_t));
    action->next = action_list;
    action_list = action;
  } else {
    if (action->type == ACTION_STRING || action->type == ACTION_ECHO || action->type == ACTION_SCRIPT) {
      if (action->param.string) {
	FREE(action->param.string);
      }
    }
  }
  action->mod = mod;
  action->button = button;
  action->type = type;
  action->keysym = keysym;
  switch(type) {
    case ACTION_STRING:
      action->handler = (action_handler_t) action_handle_string;
      action->param.string = (char *) MALLOC(strlen((char *) param) + 2);
      strcpy(action->param.string, (char *) param);
      parse_escaped_string(action->param.string);
      break;
    case ACTION_ECHO:
      action->handler = (action_handler_t) action_handle_echo;
      action->param.string = (char *) MALLOC(strlen((char *) param) + 2);
      strcpy(action->param.string, (char *) param);
      parse_escaped_string(action->param.string);
      break;
    case ACTION_SCRIPT:
      action->handler = (action_handler_t) action_handle_script;
      action->param.script = (char *) MALLOC(strlen((char *) param) + 2);
      strcpy(action->param.script, (char *) param);
      break;
    case ACTION_MENU:
      action->handler = (action_handler_t) action_handle_menu;
      action->param.menu = (menu_t *) param;
      break;
    default:
      break;
  }
  D_ACTIONS(("Added action.  mod == 0x%08x, button == %d, keysym == 0x%08x\n", action->mod, action->button, action->keysym));
}