script/generate_dummy.lua

   1 #!/usr/bin/lua
   2 --[[
   3
   4 Copyright (c) 2007 Mauro Iazzi
   5
   6 Permission is hereby granted, free of charge, to any person
   7 obtaining a copy of this software and associated documentation
   8 files (the "Software"), to deal in the Software without
   9 restriction, including without limitation the rights to use,
  10 copy, modify, merge, publish, distribute, sublicense, and/or sell
  11 copies of the Software, and to permit persons to whom the
  12 Software is furnished to do so, subject to the following
  13 conditions:
  14
  15 The above copyright notice and this permission notice shall be
  16 included in all copies or substantial portions of the Software.
  17
  18 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  19 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
  20 OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  21 NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
  22 HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
  23 WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  24 FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  25 OTHER DEALINGS IN THE SOFTWARE.
  26
  27 --]]
  28
  29
  30 HEADER_DEFINE = tostring(os.getenv'HEADER_DEFINE' or '__LQT_DUMMY')
  31 ARG_MAX = tonumber(os.getenv'ARG_MAX' or 2)
  32 TYPES = { bool='lua_pushboolean', int='lua_pushinteger', double='lua_pushnumber', ['const char *']='lua_pushstring' }
  33
  34
  35 io.write("#ifndef "..HEADER_DEFINE.."\n")
  36 io.write("#define "..HEADER_DEFINE.."\n")
  37
  38
  39 io.write[[
  40
  41
  42 #include "lqt.hpp"
  43
  44 #include <QObject>
  45 #include <QEvent>
  46 #include <QDebug>
  47 #include <QMoveEvent>
  48 #include <QPoint>
  49
  50 #define LUA_DUMMY_REGISTRY "LuaDummy"
  51 #define SEE_STACK(L, j) for (int j=1;j<=lua_gettop(L);j++) { qDebug() << j << '=' << luaL_typename(L, j) << '@' << lua_topointer (L, j); }
  52
  53 class LuaDummy: public QObject {
  54   Q_OBJECT
  55
  56   public:
  57   LuaDummy(lua_State *state):L(state) {
  58     int dummyTable = lua_gettop(L);
  59     qDebug() << "Dummy" << this << "is born";
  60     lua_getfield(L, LUA_REGISTRYINDEX, LUA_DUMMY_REGISTRY);
  61     if (lua_isnil(L, -1)) {
  62       lua_pop(L, 1);
  63       lua_newtable(L);
  64       lua_pushvalue(L, -1);
  65       lua_setfield(L, LUA_REGISTRYINDEX, LUA_DUMMY_REGISTRY);
  66     }
  67     lua_insert(L, -2);
  68
  69     lua_pushvalue(L, -1);
  70     lua_gettable(L, dummyTable);
  71
  72     if (!lua_isqobject(L, -1)) {
  73       qDebug() << "not QObject* is" << luaL_typename(L, -1);
  74       lua_pop(L, 1);
  75       // top of stack is the function I want
  76       qDebug() << "to be bound is" << luaL_typename(L, -1);
  77       lua_pushlightuserdata(L, this);
  78       lua_pushvalue(L, -2);
  79       lua_settable(L, dummyTable);
  80       // registry this is associated to this function
  81       lua_pushqobject(L, this);
  82       lua_insert(L, -2);
  83       lua_pushvalue(L, -2);
  84       lua_settable(L, dummyTable);
  85     } else {
  86       // leave the qobject on top;
  87       qDebug() << "Dummy" << this << "scheduled for deletion";
  88       this->deleteLater();
  89     }
  90     lua_replace(L, dummyTable);
  91     lua_settop(L, dummyTable);
  92
  93     lua_newtable(L);
  94     lua_pushcfunction(L, __gc);
  95     lua_setfield(L, -2, "__gc");
  96     lua_setfenv(L, -2);
  97   }
  98   virtual ~LuaDummy() {
  99     qDebug() << "Dummy" << this << "is dead";
 100   }
 101
 102   private:
 103     lua_State *L;
 104
 105     static int __gc (lua_State *L) {
 106       QPointer<QObject> *qp = (QPointer<QObject> *)lua_touserdata(L, 1);
 107       if (*qp) (*qp)->deleteLater();
 108         qDebug() << "LuaDummy" << *qp << "scheduled for deletion";
 109         return 0;
 110       }
 111   protected:
 112   public:
 113
 114     virtual bool eventFilter (QObject * watched, QEvent * event) {
 115       bool ret = false;
 116       int dummyTable = lua_gettop(L) + 1;
 117       lua_getfield(L, LUA_REGISTRYINDEX, LUA_DUMMY_REGISTRY);
 118       qDebug() << "dummyTable =" << dummyTable;
 119       SEE_STACK(L, k);qDebug() << "====";
 120       if (!lua_istable(L, -1)) {
 121         lua_settop(L, dummyTable-1);
 122         return false;
 123       }
 124       SEE_STACK(L, j);qDebug() << "====";
 125       lua_pushlightuserdata(L, this);
 126       SEE_STACK(L, j);qDebug() << "====";
 127       lua_gettable(L, dummyTable);
 128       SEE_STACK(L, j);qDebug() << "====";
 129       lua_pushqobject(L, watched);
 130       SEE_STACK(L, j);qDebug() << "====";
 131
 132       switch (event->type()) {
 133       case QEvent::None: lua_pushnil(L); break;
 134       case QEvent::AccessibilityDescription: break;
 135       case QEvent::AccessibilityHelp: break;
 136       case QEvent::AccessibilityPrepare: lua_pushstring(L, "AccessibilityPrepare"); break;
 137       case QEvent::ActionAdded: break;
 138       case QEvent::ActionChanged: break;
 139       case QEvent::ActionRemoved: break;
 140       case QEvent::ActivationChange: break;
 141       case QEvent::ApplicationActivate: break;
 142       case QEvent::ApplicationDeactivate: break;
 143       case QEvent::ApplicationFontChange: break;
 144       case QEvent::ApplicationLayoutDirectionChange: break;
 145       case QEvent::ApplicationPaletteChange: break;
 146       case QEvent::ApplicationWindowIconChange: break;
 147       case QEvent::ChildAdded: break;
 148       case QEvent::ChildPolished: break;
 149       case QEvent::ChildRemoved: break;
 150       case QEvent::Clipboard: break;
 151       case QEvent::Close: break;
 152       case QEvent::ContextMenu: break;
 153       case QEvent::DeferredDelete: break;
 154       case QEvent::DragEnter: break;
 155       case QEvent::DragLeave: break;
 156       case QEvent::DragMove: break;
 157       case QEvent::Drop: break;
 158       case QEvent::EnabledChange: break;
 159       case QEvent::Enter: lua_pushstring(L, "Enter"); break;
 160       //case QEvent::EnterEditFocus: break;
 161       case QEvent::EnterWhatsThisMode: break;
 162       case QEvent::FileOpen: break;
 163       case QEvent::FocusIn: break;
 164       case QEvent::FocusOut: break;
 165       case QEvent::FontChange: break;
 166       case QEvent::GraphicsSceneContextMenu: break;
 167       case QEvent::GraphicsSceneDragEnter: break;
 168       case QEvent::GraphicsSceneDragLeave: break;
 169       case QEvent::GraphicsSceneDragMove: break;
 170       case QEvent::GraphicsSceneDrop: break;
 171       case QEvent::GraphicsSceneHelp: break;
 172       case QEvent::GraphicsSceneHoverEnter: break;
 173       case QEvent::GraphicsSceneHoverLeave: break;
 174       case QEvent::GraphicsSceneHoverMove: break;
 175       case QEvent::GraphicsSceneMouseDoubleClick: break;
 176       case QEvent::GraphicsSceneMouseMove: break;
 177       case QEvent::GraphicsSceneMousePress: break;
 178       case QEvent::GraphicsSceneMouseRelease: break;
 179       case QEvent::GraphicsSceneWheel: break;
 180       case QEvent::Hide: break;
 181       case QEvent::HideToParent: break;
 182       case QEvent::HoverEnter: break;
 183       case QEvent::HoverLeave: break;
 184       case QEvent::HoverMove:
 185         lua_pushstring(L, "HoverMove");
 186         lua_newtable(L);
 187         lua_pushinteger(L, static_cast<QHoverEvent*>(event)->oldPos().x()); lua_setfield(L, -2, "oldx");
 188         lua_pushinteger(L, static_cast<QHoverEvent*>(event)->oldPos().y()); lua_setfield(L, -2, "oldy");
 189         lua_pushinteger(L, static_cast<QHoverEvent*>(event)->pos().x()); lua_setfield(L, -2, "x");
 190         lua_pushinteger(L, static_cast<QHoverEvent*>(event)->pos().y()); lua_setfield(L, -2, "y");
 191         break;
 192       case QEvent::IconDrag: break;
 193       case QEvent::IconTextChange: break;
 194       case QEvent::InputMethod: break;
 195       case QEvent::KeyPress: break;
 196       case QEvent::KeyRelease: break;
 197       case QEvent::LanguageChange: break;
 198       case QEvent::LayoutDirectionChange: break;
 199       case QEvent::LayoutRequest: break;
 200       case QEvent::Leave: lua_pushstring(L, "Leave"); break;
 201       //case QEvent::LeaveEditFocus: break;
 202       case QEvent::LeaveWhatsThisMode: break;
 203       case QEvent::LocaleChange: break;
 204       case QEvent::MenubarUpdated: break;
 205       case QEvent::MetaCall: break;
 206       case QEvent::ModifiedChange: break;
 207       case QEvent::MouseButtonDblClick: break;
 208       case QEvent::MouseButtonPress: break;
 209       case QEvent::MouseButtonRelease: break;
 210       case QEvent::MouseMove: break;
 211       case QEvent::MouseTrackingChange: break;
 212       case QEvent::Move:
 213         lua_pushstring(L, "Move");
 214         lua_newtable(L);
 215         lua_pushinteger(L, static_cast<QMoveEvent*>(event)->oldPos().x()); lua_setfield(L, -2, "oldx");
 216         lua_pushinteger(L, static_cast<QMoveEvent*>(event)->oldPos().y()); lua_setfield(L, -2, "oldy");
 217         lua_pushinteger(L, static_cast<QMoveEvent*>(event)->pos().x()); lua_setfield(L, -2, "x");
 218         lua_pushinteger(L, static_cast<QMoveEvent*>(event)->pos().y()); lua_setfield(L, -2, "y");
 219         break;
 220       case QEvent::Paint: break;
 221       case QEvent::PaletteChange: break;
 222       case QEvent::ParentAboutToChange: break;
 223       case QEvent::ParentChange: break;
 224       case QEvent::Polish: break;
 225       case QEvent::PolishRequest: break;
 226       case QEvent::QueryWhatsThis: break;
 227       case QEvent::Resize: break;
 228       case QEvent::Shortcut: break;
 229       case QEvent::ShortcutOverride: break;
 230       case QEvent::Show: break;
 231       case QEvent::ShowToParent: break;
 232       case QEvent::SockAct: break;
 233       case QEvent::StatusTip: break;
 234       case QEvent::StyleChange: break;
 235       case QEvent::TabletMove: break;
 236       case QEvent::TabletPress: break;
 237       case QEvent::TabletRelease: break;
 238       case QEvent::TabletEnterProximity: break;
 239       case QEvent::TabletLeaveProximity: break;
 240       case QEvent::Timer: break;
 241       case QEvent::ToolBarChange: break;
 242       case QEvent::ToolTip: break;
 243       case QEvent::UpdateLater: break;
 244       case QEvent::UpdateRequest: break;
 245       case QEvent::WhatsThis: break;
 246       case QEvent::WhatsThisClicked: break;
 247       case QEvent::Wheel: break;
 248       case QEvent::WinEventAct: break;
 249       case QEvent::WindowActivate: break;
 250       case QEvent::WindowBlocked: break;
 251       case QEvent::WindowDeactivate: break;
 252       default:
 253         lua_pushstring(L, "<unknown>");
 254         break;
 255       }
 256       while (lua_gettop(L) < dummyTable+4) { lua_pushnil(L); }
 257       SEE_STACK(L, j);
 258       qDebug() << "try to call event filter; type =" << event->type();
 259       lua_call(L, 3, 1);
 260       qDebug() << "called event filter";
 261       ret = (bool)lua_toboolean(L, -1);
 262       lua_settop(L, dummyTable-1);
 263       SEE_STACK(L, k);qDebug() << "====";
 264       return ret;
 265   };
 266   // DO NOT ENABLE THIS: IT IS FATAL! however, guess why?
 267   //virtual bool event ( QEvent * event) { return eventFilter(this, event); }
 268
 269   public slots:
 270 ]]
 271
 272 signatures = {
 273   [0] = {
 274     [''] = '',
 275   }
 276 }
 277
 278 for nargs = 1,ARG_MAX do
 279   signatures[nargs] = {}
 280   for oldsig, oldbody in pairs(signatures[nargs-1]) do
 281     for argtype, argpush in pairs(TYPES) do
 282       signatures[nargs][oldsig..((nargs==1) and '' or ', ')..argtype..' arg'..tostring(nargs)] = oldbody..argpush.."(L, arg"..tostring(nargs)..');'
 283     end
 284   end
 285 end
 286
 287 for i=0,ARG_MAX do
 288   for s, b in pairs(signatures[i]) do
 289     io.write'  void generic_slot ('
 290     io.write(s)
 291     io.write[[) {
 292       int dummyTable = lua_gettop(L) + 1;
 293       lua_getfield(L, LUA_REGISTRYINDEX, LUA_DUMMY_REGISTRY);
 294       if (!lua_istable(L, -1)) return;
 295       lua_pushlightuserdata(L, this);
 296       lua_gettable(L, dummyTable);
 297       ]]
 298     io.write(b)
 299     io.write'\n'
 300     io.write[[
 301       lua_call(L, ]]
 302     io.write(tostring(i))
 303     io.write', 0);\n'
 304     io.write[[
 305   };]]
 306     io.write'\n'
 307   end
 308 end
 309
 310 io.write[[
 311 };
 312
 313
 314 ]]
 315
 316 io.write("#endif // "..HEADER_DEFINE.."\n")
 317