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menu.cpp

/* ScummVM - Scumm Interpreter
 * Copyright (C) 2005-2006 The ScummVM project
 *
 * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * $URL: https://svn.sourceforge.net/svnroot/scummvm/scummvm/tags/release-0-9-1/engines/lure/menu.cpp $
 * $Id: menu.cpp 21992 2006-04-17 23:37:22Z eriktorbjorn $
 *
 */

#include "lure/menu.h"
#include "lure/luredefs.h"
#include "lure/decode.h"
#include "lure/surface.h"
#include "lure/system.h"
#include "lure/res_struct.h"
#include "lure/res.h"
#include "lure/strings.h"

namespace Lure {

MenuRecord::MenuRecord(uint16 hsxstartVal, uint16 hsxendVal, uint16 xstartVal, 
                                 uint16 widthVal, const char *strings) {
      _xstart = xstartVal; _width = widthVal;
      _hsxstart = hsxstartVal; _hsxend = hsxendVal;

      // Figure out the number of entries
      const char *sPtr = strings;
      _numEntries = 1;
      while ((sPtr = strchr(sPtr, ',')) != NULL) {
            ++_numEntries;
            ++sPtr;
      }

      // Set up the list of entries
      char *sCopy = strdup(strings);
      char *s;
      _entries = (char **) malloc(sizeof(char *) * _numEntries);
      uint8 index = 0;
      s = sCopy;
      while (s != NULL) {
            _entries[index++] = s;
            s = strchr(s, ',');
            if (s != NULL) *s++ = '\0'; // replace comma with NULL
      }
}

MenuRecord::~MenuRecord() {
      free(_entries[0]);      // Delete string data for all the menu items
      free(_entries);         // Free the list
}

char *MenuRecord::getEntry(uint8 index) {
      if (index >= _numEntries) error("Invalid menuitem index specified: %d", index);
      return _entries[index];
}

/*--------------------------------------------------------------------------*/

static Menu *int_menu = NULL;

Menu::Menu() {
      int_menu = this;

      MemoryBlock *data = Disk::getReference().getEntry(MENU_RESOURCE_ID);
      PictureDecoder decoder;
      _menu = decoder.decode(data, SCREEN_SIZE);
      delete data;

      _menus[0] = new MenuRecord(40, 87, 20, 80, "Credits");
      _menus[1] = new MenuRecord(127, 179, 100, 120, "Restart game,Save game,Restore game");
      _menus[2] = new MenuRecord(224, 281, 210, 105, "Quit,Slow Text\x8b,Sound on ");
      _selectedMenu = NULL;
}

Menu::~Menu() {
      for (int ctr=0; ctr<NUM_MENUS; ++ctr) delete _menus[ctr];
      delete _menu;
}

Menu &Menu::getReference() {
      return *int_menu;
}

uint8 Menu::execute() {
      OSystem &system = System::getReference();
      Mouse &mouse = Mouse::getReference();
      Events &events = Events::getReference();
      Screen &screen = Screen::getReference();

      mouse.setCursorNum(CURSOR_ARROW);
      system.copyRectToScreen(_menu->data(), FULL_SCREEN_WIDTH, 0, 0, 
            FULL_SCREEN_WIDTH, MENUBAR_Y_SIZE);

      _selectedMenu = NULL;
      _surfaceMenu = NULL;
      _selectedIndex = 0;

      while (mouse.lButton() || mouse.rButton()) {
            while (events.pollEvent()) {
                  if (events.quitFlag) return MENUITEM_NONE;

                  if (mouse.y() < MENUBAR_Y_SIZE)
                  {
                        MenuRecord *p = getMenuAt(mouse.x());

                        if (_selectedMenu != p) {
                              // If necessary, remove prior menu
                              if (_selectedMenu) {
                                    toggleHighlight(_selectedMenu);
//                                  screen.updateArea(_selectedMenu->xstart(), MENUBAR_Y_SIZE,
//                                        _surfaceMenu->width(), _surfaceMenu->height());
                                    screen.updateArea(0, MENUBAR_Y_SIZE, FULL_SCREEN_WIDTH, 
                                          _surfaceMenu->height());
                                    delete _surfaceMenu;
                                    _surfaceMenu = NULL;
                                    _selectedIndex = 0;
                              }                                   

                              _selectedMenu = p;

                              // If a new menu is selected, show it
                              if (_selectedMenu) {
                                    toggleHighlight(_selectedMenu);
                                    _surfaceMenu = Surface::newDialog(
                                          _selectedMenu->width(), _selectedMenu->numEntries(), 
                                          _selectedMenu->entries(), false, MENU_UNSELECTED_COLOUR);
                                    _surfaceMenu->copyToScreen(_selectedMenu->xstart(), MENUBAR_Y_SIZE);
                              }

                              system.copyRectToScreen(_menu->data(), FULL_SCREEN_WIDTH, 0, 0, 
                                    FULL_SCREEN_WIDTH, MENUBAR_Y_SIZE);
                        }
                  }

                  // Check for changing selected index
                  uint8 index = getIndexAt(mouse.x(), mouse.y());
                  if (index != _selectedIndex) {
                        if (_selectedIndex != 0) toggleHighlightItem(_selectedIndex);
                        _selectedIndex = index;
                        if (_selectedIndex != 0) toggleHighlightItem(_selectedIndex);
                  }
            }

            system.updateScreen();
            system.delayMillis(10);
      }

      if (_surfaceMenu) delete _surfaceMenu;

      // Deselect the currently selected menu header
      if (_selectedMenu) 
            toggleHighlight(_selectedMenu);

      // Restore the previous screen
      screen.update();
      
      if ((_selectedMenu == NULL) || (_selectedIndex == 0)) return MENUITEM_NONE;
      else if (_selectedMenu == _menus[0]) return MENUITEM_CREDITS;
      else if (_selectedMenu == _menus[1]) {
            switch (_selectedIndex) {
                  case 1: return MENUITEM_RESTART_GAME;
                  case 2: return MENUITEM_SAVE_GAME;
                  case 3: return MENUITEM_RESTORE_GAME;
            }
      } else {
            switch (_selectedIndex) {
                  case 1: return MENUITEM_QUIT;
                  case 2: return MENUITEM_TEXT_SPEED;
                  case 3: return MENUITEM_SOUND;
            }
      }
      return MENUITEM_NONE;
}     

MenuRecord *Menu::getMenuAt(int x) {
      for (int ctr = 0; ctr < NUM_MENUS; ++ctr)
            if ((x >= _menus[ctr]->hsxstart()) && (x <= _menus[ctr]->hsxend())) 
                  return _menus[ctr];

      return NULL;
}

uint8 Menu::getIndexAt(uint16 x, uint16 y) {
      if (!_selectedMenu) return 0;

      int ys = MENUBAR_Y_SIZE + DIALOG_EDGE_SIZE + 3;
      int ye = MENUBAR_Y_SIZE + _surfaceMenu->height() - DIALOG_EDGE_SIZE - 3;
      if ((y < ys) || (y > ye)) return 0;

      uint16 yRelative = y - ys;
      uint8 index = (uint8) (yRelative / 8) + 1;
      if (index > _selectedMenu->numEntries()) index = _selectedMenu->numEntries();
      return index;
}

void Menu::toggleHighlight(MenuRecord *menuRec) {
      byte *addr = _menu->data();

      for (uint16 y=0; y<MENUBAR_Y_SIZE; ++y) {
            for (uint16 x=menuRec->hsxstart(); x<=menuRec->hsxend(); ++x) {
                  if (addr[x] == MENUBAR_SELECTED_COLOUR) addr[x] = 0;
                  else if (addr[x] == 0) addr[x] = MENUBAR_SELECTED_COLOUR;
            }
            addr += FULL_SCREEN_WIDTH;
      }
}

void Menu::toggleHighlightItem(uint8 index) {
      byte *p = _surfaceMenu->data().data() + (DIALOG_EDGE_SIZE + 3 + 
            ((index - 1) * 8)) * _surfaceMenu->width();
      uint32 numBytes = 8 * _surfaceMenu->width();

      while (numBytes-- > 0) {
            if (*p == MENU_UNSELECTED_COLOUR) *p = MENU_SELECTED_COLOUR;
            else if (*p == MENU_SELECTED_COLOUR) *p = MENU_UNSELECTED_COLOUR;
            ++p;
      }

      _surfaceMenu->copyToScreen(_selectedMenu->xstart(), MENUBAR_Y_SIZE);
}

/*--------------------------------------------------------------------------*/

uint16 PopupMenu::ShowInventory() {
      Resources &rsc = Resources::getReference();
      StringData &strings = StringData::getReference();

      uint16 numItems = rsc.numInventoryItems();
      uint16 itemCtr = 0;
      char **itemNames = (char **) Memory::alloc(sizeof(char *) * numItems);
      uint16 *idList = (uint16 *) Memory::alloc(sizeof(uint16) * numItems);

      HotspotDataList::iterator i;
      for (i = rsc.hotspotData().begin(); i != rsc.hotspotData().end(); ++i) {
            HotspotData *hotspot = *i;
            if (hotspot->roomNumber == PLAYER_ID) {
                  idList[itemCtr] = hotspot->hotspotId;
                  char *hotspotName = itemNames[itemCtr++] = (char *) malloc(MAX_HOTSPOT_NAME_SIZE);
                  strings.getString(hotspot->nameId, hotspotName, NULL, NULL);
            }
      }
      
      uint16 result = Show(numItems, (const char **) itemNames);
      if (result != 0xffff) result = idList[result];

      for (itemCtr = 0; itemCtr < numItems; ++itemCtr)
            free(itemNames[itemCtr]);

      delete itemNames;
      delete idList;
      return result;
}

Action PopupMenu::Show(uint32 actionMask) {
      int numEntries = 0;
      uint32 v = actionMask;
      int index;

      for (index = 1; index <= EXAMINE; ++index, v >>= 1) {
            if (v & 1) ++numEntries;
      }

      const char **strList = (const char **) Memory::alloc(sizeof(char *) * numEntries);

      v = actionMask;
      int strIndex = 0;
      for (index=1; index<=EXAMINE; ++index, v >>= 1) {
            if (v & 1) 
                  strList[strIndex++] = actionList[index];
      }

      uint16 result = Show(numEntries, strList);
      
      if (result == 0xffff) return NONE;

      v = actionMask;
      for (index = 1; index <= EXAMINE; ++index, v >>= 1) {
            if (v & 1) 
                  if (result-- == 0) return (Action) index;
      }

      delete strList;
      return NONE;
}

Action PopupMenu::Show(int numEntries, Action *actions) {
      const char **strList = (const char **) Memory::alloc(sizeof(char *) * numEntries);
      Action *actionPtr = actions;
      for (int index = 0; index < numEntries; ++index)
            strList[index] = actionList[*actionPtr++];
      uint16 result = Show(numEntries, strList);
      
      delete strList;
      if (result == 0xffff) return NONE;
      else return actions[result];
}

uint16 PopupMenu::Show(int numEntries, const char *actions[]) {
      if (numEntries == 0) return 0xffff;
      Events &e = Events::getReference();
      Mouse &mouse = Mouse::getReference();
      OSystem &system = System::getReference();
      Screen &screen = Screen::getReference();
      Rect r;

      mouse.cursorOff();
      uint16 oldX = mouse.x();
      uint16 oldY = mouse.y();
      const uint16 yMiddle = FULL_SCREEN_HEIGHT / 2;
      mouse.setPosition(FULL_SCREEN_WIDTH / 2, yMiddle);

      // Round up number of lines in dialog to next odd number
      uint16 numLines = (numEntries / 2) * 2 + 1;
      if (numLines > 5) numLines = 5;

      // Figure out the character width
      uint16 numCols = 0;
      for (int ctr = 0; ctr < numEntries; ++ctr) {
            int len = strlen(actions[ctr]);
            if (len > numCols)
                  numCols = len;
      }

      // Create the dialog surface
      Surface *s = new Surface(DIALOG_EDGE_SIZE * 2 + numCols * FONT_WIDTH, 
            DIALOG_EDGE_SIZE * 2 + numLines * FONT_HEIGHT);
      s->createDialog();

      int selectedIndex = 0;
      bool refreshFlag = true;
      r.left = DIALOG_EDGE_SIZE;
      r.right = s->width() - DIALOG_EDGE_SIZE - 1;
      r.top = DIALOG_EDGE_SIZE;
      r.bottom = s->height() - DIALOG_EDGE_SIZE - 1;

      for (;;) {
            if (refreshFlag) {
                  // Set up the contents of the menu
                  s->fillRect(r, 0);

                  for (int index = 0; index < numLines; ++index) {
                        int actionIndex = selectedIndex - (numEntries / 2) + index;
                        if ((actionIndex >= 0) && (actionIndex < numEntries)) {
                              s->writeString(DIALOG_EDGE_SIZE, DIALOG_EDGE_SIZE + index * FONT_HEIGHT,
                                    actions[actionIndex], true, 
                                    (index == (numLines / 2)) ? MENU_SELECTED_COLOUR : MENU_UNSELECTED_COLOUR,
                                    false);
                        }
                  }

                  s->copyToScreen(0, yMiddle-(s->height() / 2));
                  system.updateScreen();
                  refreshFlag = false;
            }

            while (e.pollEvent()) {
                  if (e.quitFlag) {
                        selectedIndex = 0xffff;
                        goto bail_out;
                  }

                  else if (e.type() == OSystem::EVENT_KEYDOWN) {
                        byte ch = e.event().kbd.ascii;
                        uint16 keycode = e.event().kbd.keycode;

                        if (((keycode == 0x108) || (keycode == 0x111)) && (selectedIndex > 0)) {
                              --selectedIndex;
                              refreshFlag = true;
                        } else if (((keycode == 0x102) || (keycode == 0x112)) && 
                                    (selectedIndex < numEntries-1)) {
                              ++selectedIndex;
                              refreshFlag = true;
                        } else if ((ch == '\xd') || (keycode == 0x10f)) {
                              goto bail_out;
                        } else if (ch == '\x1b') {
                              selectedIndex = 0xffff;
                              goto bail_out;
                        }

                  } else if (e.type() == OSystem::EVENT_LBUTTONDOWN) {
                        mouse.waitForRelease();
                        goto bail_out;

                  } else if (e.type() == OSystem::EVENT_RBUTTONDOWN) {
                        mouse.waitForRelease();
                        selectedIndex = 0xffff;
                        goto bail_out;
                  }
            }

            // Warping the mouse to "neutral" even if the top/bottom menu
            // entry has been reached has both pros and cons. It makes the
            // menu behave a bit more sensibly, but it also makes it harder
            // to move the mouse pointer out of the ScummVM window.

            if (mouse.y() < yMiddle - POPMENU_CHANGE_SENSITIVITY) {
                  if (selectedIndex > 0) {
                        --selectedIndex;
                        refreshFlag = true;
                  }
                  mouse.setPosition(FULL_SCREEN_WIDTH / 2, yMiddle);
            } else if (mouse.y() > yMiddle + POPMENU_CHANGE_SENSITIVITY) {
                  if (selectedIndex < numEntries - 1) {
                        ++selectedIndex;
                        refreshFlag = true;
                  }
                  mouse.setPosition(FULL_SCREEN_WIDTH / 2, yMiddle);
            }

            system.delayMillis(20);
      }

bail_out:
      mouse.setPosition(oldX, oldY);
      mouse.cursorOn();
      screen.update();
      return selectedIndex;
}

} // end of namespace Lure

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