Usermode/Applications/axwin3_src/WM/wm.c

   1 /*
   2  * Acess2 Window Manager v3
   3  * - By John Hodge (thePowersGang)
   4  *
   5  * wm.c
   6  * - Window manager core
   7  */
   8 #include <common.h>
   9 #include <wm_renderer.h>
  10 #include <stdlib.h>
  11 #include <string.h>
  12 #include <video.h>
  13 #include <wm_messages.h>
  14 #include <decorator.h>
  15
  16 // === IMPORTS ===
  17 extern void     IPC_SendWMMessage(tIPC_Client *Client, uint32_t Src, uint32_t Dst, int Msg, int Len, const void *Data);
  18 extern void     IPC_SendReply(tIPC_Client *Client, uint32_t WinID, int MsgID, size_t Len, const void *Data);
  19 extern tWindow  *IPC_int_GetWindow(tIPC_Client *Client, uint32_t ID);
  20
  21 // === GLOBALS ===
  22 tWMRenderer     *gpWM_Renderers;
  23 tWindow *gpWM_RootWindow;
  24 //! Window which will recieve the next keyboard event
  25 tWindow *gpWM_FocusedWindow;
  26 //! Hilighted window (owner of the currently focused window)
  27 tWindow *gpWM_HilightedWindow;
  28
  29 // === CODE ===
  30 void WM_Initialise(void)
  31 {
  32         WM_CreateWindow(NULL, NULL, 0, 0x0088FF, "Background");
  33         gpWM_RootWindow->W = giScreenWidth;
  34         gpWM_RootWindow->H = giScreenHeight;
  35         gpWM_RootWindow->Flags = WINFLAG_SHOW|WINFLAG_NODECORATE;
  36 }
  37
  38 void WM_RegisterRenderer(tWMRenderer *Renderer)
  39 {
  40         // TODO: Catch out duplicates
  41         Renderer->Next = gpWM_Renderers;
  42         gpWM_Renderers = Renderer;
  43 }
  44
  45 // --- Manipulation
  46 tWindow *WM_CreateWindow(tWindow *Parent, tIPC_Client *Client, uint32_t ID, int RendererArg, const char *RendererName)
  47 {
  48         tWMRenderer     *renderer;
  49         tWindow *ret;
  50
  51         // - Get Renderer
  52         for( renderer = gpWM_Renderers; renderer; renderer = renderer->Next )
  53         {
  54                 if(strcmp(RendererName, renderer->Name) == 0)
  55                         break;
  56         }
  57         if(renderer == NULL)
  58                 return NULL;
  59
  60         // - Call create window function
  61         ret = renderer->CreateWindow(RendererArg);
  62         ret->Client = Client;
  63         ret->ID = ID;
  64         ret->Parent = Parent;
  65         if(!ret->Parent)
  66                 ret->Parent = gpWM_RootWindow;
  67         ret->Owner = Parent;
  68         ret->Renderer = renderer;
  69         ret->Flags |= WINFLAG_CLEAN;    // Needed to stop invaildate early exiting
  70
  71         // Append to parent
  72         if(ret->Parent)
  73         {
  74                 if(ret->Parent->LastChild)
  75                         ret->Parent->LastChild->NextSibling = ret;
  76                 else
  77                         ret->Parent->FirstChild = ret;
  78                 ret->PrevSibling = ret->Parent->LastChild;
  79                 ret->Parent->LastChild = ret;
  80                 ret->NextSibling = NULL;
  81         }
  82         else
  83         {
  84                 gpWM_RootWindow = ret;
  85         }
  86
  87         // Don't decorate child windows by default
  88         if(Parent)
  89         {
  90                 ret->Flags |= WINFLAG_NODECORATE;
  91         }
  92
  93         // - Return!
  94         return ret;
  95 }
  96
  97 tWindow *WM_GetWindowByID(tWindow *Requester, uint32_t ID)
  98 {
  99         return IPC_int_GetWindow(Requester->Client, ID);
 100 }
 101
 102 tWindow *WM_CreateWindowStruct(size_t ExtraSize)
 103 {
 104         tWindow *ret;
 105
 106         ret = calloc( sizeof(tWindow) + ExtraSize, 1 );
 107         ret->RendererInfo = ret + 1;    // Get end of tWindow
 108
 109         return ret;
 110 }
 111
 112 void WM_SetWindowTitle(tWindow *Window, const char *Title)
 113 {
 114         if(Window->Title)
 115                 free(Window->Title);
 116         Window->Title = strdup(Title);
 117         _SysDebug("Window %p title set to '%s'", Window, Title);
 118 }
 119
 120 void WM_RaiseWindow(tWindow *Window)
 121 {
 122         tWindow *parent = Window->Parent;
 123         if(!Window->Parent)     return ;
 124
 125         // Remove from list
 126         if(Window->PrevSibling)
 127                 Window->PrevSibling->NextSibling = Window->NextSibling;
 128         if(Window->NextSibling)
 129                 Window->NextSibling->PrevSibling = Window->PrevSibling;
 130         if(parent->FirstChild == Window)
 131                 parent->FirstChild = Window->NextSibling;
 132         if(parent->LastChild == Window)
 133                 parent->LastChild = Window->PrevSibling;
 134
 135         // Append to end
 136         if(parent->LastChild)
 137                 parent->LastChild->NextSibling = Window;
 138         else
 139                 parent->FirstChild = Window;
 140         Window->PrevSibling = parent->LastChild;
 141         Window->NextSibling = NULL;
 142         parent->LastChild = Window;
 143 }
 144
 145 void WM_FocusWindow(tWindow *Destination)
 146 {
 147         struct sWndMsg_Bool     _msg;
 148
 149         if( gpWM_FocusedWindow == Destination )
 150                 return ;
 151         if( Destination && !(Destination->Flags & WINFLAG_SHOW) )
 152                 return ;
 153
 154         if( gpWM_FocusedWindow )
 155         {
 156                 _msg.Val = 0;
 157                 WM_SendMessage(NULL, gpWM_FocusedWindow, WNDMSG_FOCUS, sizeof(_msg), &_msg);
 158         }
 159         if( Destination )
 160         {
 161                 _msg.Val = 1;
 162                 WM_SendMessage(NULL, Destination, WNDMSG_FOCUS, sizeof(_msg), &_msg);
 163         }
 164
 165         WM_Invalidate(gpWM_FocusedWindow);
 166         WM_Invalidate(Destination);
 167         gpWM_FocusedWindow = Destination;
 168
 169
 170         // Get the owner of the focused window
 171 //      while(Destination && Destination->Owner)        Destination = Destination->Owner;
 172 //      gpWM_HilightedWindow = Destination;
 173 }
 174
 175
 176 void WM_ShowWindow(tWindow *Window, int bShow)
 177 {
 178         struct sWndMsg_Bool     _msg;
 179
 180         if( !!(Window->Flags & WINFLAG_SHOW) == bShow )
 181                 return ;
 182
 183         // Message window
 184         _msg.Val = !!bShow;
 185         WM_SendMessage(NULL, Window, WNDMSG_SHOW, sizeof(_msg), &_msg);
 186
 187         // Update the flag
 188         if(bShow)
 189                 Window->Flags |= WINFLAG_SHOW;
 190         else
 191         {
 192                 Window->Flags &= ~WINFLAG_SHOW;
 193
 194                 if( Window == gpWM_FocusedWindow )
 195                         WM_FocusWindow(Window->Parent);
 196
 197                 // Just a little memory saving for large hidden windows
 198                 if(Window->RenderBuffer) {
 199                         free(Window->RenderBuffer);
 200                         Window->RenderBuffer = NULL;
 201                 }
 202         }
 203
 204         WM_Invalidate(Window);
 205 }
 206
 207 void WM_DecorateWindow(tWindow *Window, int bDecorate)
 208 {
 209         if( !(Window->Flags & WINFLAG_NODECORATE) == !!bDecorate )
 210                 return ;
 211
 212         if(bDecorate)
 213                 Window->Flags &= ~WINFLAG_NODECORATE;
 214         else
 215                 Window->Flags |= WINFLAG_NODECORATE;
 216
 217         // Needed because the window size changes
 218         if(Window->RenderBuffer) {
 219                 free(Window->RenderBuffer);
 220                 Window->RenderBuffer = NULL;
 221         }
 222
 223         WM_Invalidate(Window);
 224 }
 225
 226 void WM_SetRelative(tWindow *Window, int bRelativeToParent)
 227 {
 228 //      _SysDebug("WM_SetRelative: (%p{Parent=%p},%i)", Window, Window->Parent, bRelativeToParent);
 229         // No meaning if no parent
 230         if( !Window->Parent )
 231                 return ;
 232
 233         // Check that the flag is changing
 234         if( !!bRelativeToParent == !!(Window->Flags & WINFLAG_RELATIVE) )
 235                 return ;
 236
 237         if( bRelativeToParent ) {
 238                 // Set
 239                 Window->Flags |= WINFLAG_RELATIVE;
 240                 WM_MoveWindow(Window, Window->X, Window->Y);
 241         }
 242         else {
 243                 // Clear
 244                 Window->Flags &= ~WINFLAG_RELATIVE;
 245                 WM_MoveWindow(Window, Window->X - Window->Parent->X, Window->Y - Window->Parent->Y);
 246         }
 247 }
 248
 249 int WM_MoveWindow(tWindow *Window, int X, int Y)
 250 {
 251 //      _SysDebug("Move %p to (%i,%i)", Window, X, Y);
 252         // Clip coordinates
 253         if(X + Window->W < 0)   X = -Window->W + 1;
 254         if(Y + Window->H < 0)   Y = -Window->H + 1;
 255         if(X >= giScreenWidth)  X = giScreenWidth - 1;
 256         if(Y >= giScreenHeight) Y = giScreenHeight - 1;
 257
 258         // If relative to the parent, extra checks
 259         if( (Window->Flags & WINFLAG_RELATIVE) && Window->Parent )
 260         {
 261                 if( X > Window->Parent->W )     return 1;
 262                 if( Y > Window->Parent->H )     return 1;
 263         }
 264         // TODO: Re-sanitise
 265
 266         Window->X = X;  Window->Y = Y;
 267
 268         // TODO: Why invalidate buffer?
 269         WM_Invalidate(Window);
 270
 271         return 0;
 272 }
 273
 274 int WM_ResizeWindow(tWindow *Window, int W, int H)
 275 {
 276         if(W <= 0 || H <= 0 )   return 1;
 277         if(Window->X + W < 0)   Window->X = -W + 1;
 278         if(Window->Y + H < 0)   Window->Y = -H + 1;
 279
 280         if( Window->W == W && Window->H == H )
 281                 return 0;
 282
 283         Window->W = W;  Window->H = H;
 284
 285         if(Window->RenderBuffer) {
 286                 free(Window->RenderBuffer);
 287                 Window->RenderBuffer = NULL;
 288         }
 289         WM_Invalidate(Window);
 290
 291         {
 292                 struct sWndMsg_Resize   msg;
 293                 msg.W = W;
 294                 msg.H = H;
 295                 WM_SendMessage(NULL, Window, WNDMSG_RESIZE, sizeof(msg), &msg);
 296         }
 297
 298         return 0;
 299 }
 300
 301 int WM_SendMessage(tWindow *Source, tWindow *Dest, int Message, int Length, const void *Data)
 302 {
 303 //      _SysDebug("WM_SendMessage: (%p, %p, %i, %i, %p)", Source, Dest, Message, Length, Data);
 304         if(Dest == NULL) {
 305                 _SysDebug("WM_SendMessage: NULL destination from %p", __builtin_return_address(0));
 306                 return -2;
 307         }
 308         if(Length > 0 && Data == NULL) {
 309                 _SysDebug("WM_SendMessage: non-zero length and NULL data");
 310                 return -1;
 311         }
 312
 313         if( Decorator_HandleMessage(Dest, Message, Length, Data) != 1 )
 314         {
 315                 // TODO: Catch errors from ->HandleMessage
 316 //              _SysDebug("WM_SendMessage: Decorator grabbed message?");
 317                 return 0;
 318         }
 319
 320         // ->HandleMessage returns 1 when the message was not handled
 321         if( Dest->Renderer->HandleMessage(Dest, Message, Length, Data) != 1 )
 322         {
 323                 // TODO: Catch errors from ->HandleMessage
 324 //              _SysDebug("WM_SendMessage: Renderer grabbed message?");
 325                 return 0;
 326         }
 327
 328         // TODO: Implement message masking
 329
 330         // Dispatch to client
 331         if(Dest->Client)
 332         {
 333                 uint32_t        src_id;
 334                 if(!Source)
 335                         src_id = -1;
 336                 else if(Source->Client != Dest->Client) {
 337                         // TODO: Support different client source windows
 338                         _SysDebug("WM_SendMessage: TODO - Support inter-client messages");
 339                         return -1;
 340                 }
 341                 else {
 342                         src_id = Source->ID;
 343                 }
 344
 345 //              _SysDebug("WM_SendMessage: IPC Dispatch");
 346                 IPC_SendWMMessage(Dest->Client, src_id, Dest->ID, Message, Length, Data);
 347         }
 348
 349         return 1;
 350 }
 351
 352 int WM_SendIPCReply(tWindow *Window, int Message, size_t Length, const void *Data)
 353 {
 354         IPC_SendReply(Window->Client, Window->ID, Message, Length, Data);
 355         return 0;
 356 }
 357
 358 void WM_Invalidate(tWindow *Window)
 359 {
 360         if(!Window)     return ;
 361 //      _SysDebug("Invalidating %p", Window);
 362         // Don't invalidate twice (speedup)
 363 //      if( !(Window->Flags & WINFLAG_CLEAN) )  return;
 364
 365         // Mark for re-render
 366         Window->Flags &= ~WINFLAG_CLEAN;
 367
 368         // Mark up the tree that a child window has changed
 369         while( (Window = Window->Parent) )
 370                 Window->Flags &= ~WINFLAG_CHILDCLEAN;
 371 }
 372
 373 // --- Rendering / Update
 374 void WM_int_UpdateWindow(tWindow *Window)
 375 {
 376          int    bDecoratorRedraw = 0;
 377
 378         // Ignore hidden windows
 379         if( !(Window->Flags & WINFLAG_SHOW) )
 380                 return ;
 381
 382         // Render
 383         if( !(Window->Flags & WINFLAG_CLEAN) )
 384         {
 385                 // Calculate RealW/RealH
 386                 if( !(Window->Flags & WINFLAG_NODECORATE) )
 387                 {
 388                         //_SysDebug("Applying decorations to %p", Window);
 389                         Decorator_UpdateBorderSize(Window);
 390                         Window->RealW = Window->BorderL + Window->W + Window->BorderR;
 391                         Window->RealH = Window->BorderT + Window->H + Window->BorderB;
 392                         bDecoratorRedraw = 1;
 393                 }
 394                 else
 395                 {
 396                         Window->BorderL = 0;
 397                         Window->BorderR = 0;
 398                         Window->BorderT = 0;
 399                         Window->BorderB = 0;
 400                         Window->RealW = Window->W;
 401                         Window->RealH = Window->H;
 402                 }
 403
 404                 if( (Window->Flags & WINFLAG_RELATIVE) && Window->Parent )
 405                 {
 406                         Window->RealX = Window->Parent->X + Window->Parent->BorderL + Window->X;
 407                         Window->RealY = Window->Parent->Y + Window->Parent->BorderT + Window->Y;
 408                 }
 409                 else
 410                 {
 411                         Window->RealX = Window->X;
 412                         Window->RealY = Window->Y;
 413                 }
 414
 415                 Window->Renderer->Redraw(Window);
 416                 Window->Flags |= WINFLAG_CLEAN;
 417         }
 418
 419         // Process children
 420         if( !(Window->Flags & WINFLAG_CHILDCLEAN) )
 421         {
 422                 tWindow *child;
 423                 for( child = Window->FirstChild; child; child = child->NextSibling )
 424                 {
 425                         WM_int_UpdateWindow(child);
 426                 }
 427                 Window->Flags |= WINFLAG_CHILDCLEAN;
 428         }
 429
 430         if( bDecoratorRedraw )
 431                 Decorator_Redraw(Window);
 432 }
 433
 434 void WM_int_BlitWindow(tWindow *Window)
 435 {
 436         tWindow *child;
 437
 438         // Ignore hidden windows
 439         if( !(Window->Flags & WINFLAG_SHOW) )
 440                 return ;
 441
 442 //      _SysDebug("Blit %p (%p) to (%i,%i) %ix%i", Window, Window->RenderBuffer,
 443 //              Window->RealX, Window->RealY, Window->RealW, Window->RealH);
 444         Video_Blit(Window->RenderBuffer, Window->RealX, Window->RealY, Window->RealW, Window->RealH);
 445
 446         if( Window == gpWM_FocusedWindow && Window->CursorW )
 447         {
 448                 Video_FillRect(
 449                         Window->RealX + Window->BorderL + Window->CursorX,
 450                         Window->RealY + Window->BorderT + Window->CursorY,
 451                         Window->CursorW, Window->CursorH,
 452                         0x000000
 453                         );
 454         }
 455
 456         for( child = Window->FirstChild; child; child = child->NextSibling )
 457         {
 458                 WM_int_BlitWindow(child);
 459         }
 460 }
 461
 462 void WM_Update(void)
 463 {
 464         // Don't redraw if nothing has changed
 465         if( (gpWM_RootWindow->Flags & WINFLAG_CHILDCLEAN) )
 466                 return ;
 467
 468         // - Iterate through visible windows, updating them as needed
 469         WM_int_UpdateWindow(gpWM_RootWindow);
 470
 471         // - Draw windows from back to front to the render buffer
 472         WM_int_BlitWindow(gpWM_RootWindow);
 473
 474         Video_Update();
 475 }
 476