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 /*
 146 void WM_RaiseWindow(tWindow *Window)
 147 {
 148         // Move to the last render position (move to top)
 149         while(Window && Window->Parent)
 150         {
 151                 if( Window->NextSibling )
 152                 {
 153                         // remove
 154                         if( Window->PrevSibling )
 155                                 Window->PrevSibling->NextSibling = Window->NextSibling;
 156                         Window->NextSibling->PrevSibling = Window->PrevSibling;
 157                         // Mutate self
 158                         Window->PrevSibling = Window->Parent->LastChild;
 159                         Window->NextSibling = NULL;
 160                         // re-add
 161                         Window->PrevSibling->NextSibling = Window;
 162                         Window->Parent->LastChild = Window;
 163                 }
 164                 _SysDebug("WM_RaiseWindow: Raised %p", Window);
 165                 Window = Window->Parent;
 166         }
 167 }
 168 */
 169
 170 void WM_FocusWindow(tWindow *Destination)
 171 {
 172         struct sWndMsg_Bool     _msg;
 173
 174         if( gpWM_FocusedWindow == Destination )
 175                 return ;
 176         if( Destination && !(Destination->Flags & WINFLAG_SHOW) )
 177                 return ;
 178
 179         if( gpWM_FocusedWindow )
 180         {
 181                 _msg.Val = 0;
 182                 WM_SendMessage(NULL, gpWM_FocusedWindow, WNDMSG_FOCUS, sizeof(_msg), &_msg);
 183         }
 184         if( Destination )
 185         {
 186                 _msg.Val = 1;
 187                 WM_SendMessage(NULL, Destination, WNDMSG_FOCUS, sizeof(_msg), &_msg);
 188         }
 189
 190         WM_Invalidate(gpWM_FocusedWindow);
 191         WM_Invalidate(Destination);
 192
 193         WM_RaiseWindow(Destination);
 194
 195         gpWM_FocusedWindow = Destination;
 196 }
 197
 198
 199 void WM_ShowWindow(tWindow *Window, int bShow)
 200 {
 201         struct sWndMsg_Bool     _msg;
 202
 203         if( !!(Window->Flags & WINFLAG_SHOW) == bShow )
 204                 return ;
 205
 206         // Message window
 207         _msg.Val = !!bShow;
 208         WM_SendMessage(NULL, Window, WNDMSG_SHOW, sizeof(_msg), &_msg);
 209
 210         // Update the flag
 211         if(bShow)
 212                 Window->Flags |= WINFLAG_SHOW;
 213         else
 214         {
 215                 Window->Flags &= ~WINFLAG_SHOW;
 216
 217                 if( Window == gpWM_FocusedWindow )
 218                         WM_FocusWindow(Window->Parent);
 219
 220                 // Just a little memory saving for large hidden windows
 221                 if(Window->RenderBuffer) {
 222                         free(Window->RenderBuffer);
 223                         Window->RenderBuffer = NULL;
 224                 }
 225         }
 226
 227         WM_Invalidate(Window);
 228 }
 229
 230 void WM_DecorateWindow(tWindow *Window, int bDecorate)
 231 {
 232         if( !(Window->Flags & WINFLAG_NODECORATE) == !!bDecorate )
 233                 return ;
 234
 235         if(bDecorate)
 236                 Window->Flags &= ~WINFLAG_NODECORATE;
 237         else
 238                 Window->Flags |= WINFLAG_NODECORATE;
 239
 240         // Needed because the window size changes
 241         if(Window->RenderBuffer) {
 242                 free(Window->RenderBuffer);
 243                 Window->RenderBuffer = NULL;
 244         }
 245
 246         WM_Invalidate(Window);
 247 }
 248
 249 void WM_SetRelative(tWindow *Window, int bRelativeToParent)
 250 {
 251 //      _SysDebug("WM_SetRelative: (%p{Parent=%p},%i)", Window, Window->Parent, bRelativeToParent);
 252         // No meaning if no parent
 253         if( !Window->Parent )
 254                 return ;
 255
 256         // Check that the flag is changing
 257         if( !!bRelativeToParent == !!(Window->Flags & WINFLAG_RELATIVE) )
 258                 return ;
 259
 260         if( bRelativeToParent ) {
 261                 // Set
 262                 Window->Flags |= WINFLAG_RELATIVE;
 263                 WM_MoveWindow(Window, Window->X, Window->Y);
 264         }
 265         else {
 266                 // Clear
 267                 Window->Flags &= ~WINFLAG_RELATIVE;
 268                 WM_MoveWindow(Window, Window->X - Window->Parent->X, Window->Y - Window->Parent->Y);
 269         }
 270 }
 271
 272 int WM_MoveWindow(tWindow *Window, int X, int Y)
 273 {
 274 //      _SysDebug("Move %p to (%i,%i)", Window, X, Y);
 275         // Clip coordinates
 276         if(X + Window->W < 0)   X = -Window->W + 1;
 277         if(Y + Window->H < 0)   Y = -Window->H + 1;
 278         if(X >= giScreenWidth)  X = giScreenWidth - 1;
 279         if(Y >= giScreenHeight) Y = giScreenHeight - 1;
 280
 281         // If relative to the parent, extra checks
 282         if( (Window->Flags & WINFLAG_RELATIVE) && Window->Parent )
 283         {
 284                 if( X > Window->Parent->W )     return 1;
 285                 if( Y > Window->Parent->H )     return 1;
 286         }
 287         // TODO: Re-sanitise
 288
 289         _SysDebug("WM_MoveWindow: (%i,%i)", X, Y);
 290         Window->X = X;  Window->Y = Y;
 291
 292         // TODO: Why invalidate buffer?
 293         WM_Invalidate(Window);
 294
 295         return 0;
 296 }
 297
 298 int WM_ResizeWindow(tWindow *Window, int W, int H)
 299 {
 300         if(W <= 0 || H <= 0 )   return 1;
 301         if(Window->X + W < 0)   Window->X = -W + 1;
 302         if(Window->Y + H < 0)   Window->Y = -H + 1;
 303
 304         if( Window->W == W && Window->H == H )
 305                 return 0;
 306
 307         _SysDebug("WM_Resizeindow: %ix%i", W, H);
 308         Window->W = W;  Window->H = H;
 309
 310         if(Window->RenderBuffer) {
 311                 free(Window->RenderBuffer);
 312                 Window->RenderBuffer = NULL;
 313         }
 314         WM_Invalidate(Window);
 315
 316         {
 317                 struct sWndMsg_Resize   msg;
 318                 msg.W = W;
 319                 msg.H = H;
 320                 WM_SendMessage(NULL, Window, WNDMSG_RESIZE, sizeof(msg), &msg);
 321         }
 322
 323         return 0;
 324 }
 325
 326 int WM_SendMessage(tWindow *Source, tWindow *Dest, int Message, int Length, const void *Data)
 327 {
 328 //      _SysDebug("WM_SendMessage: (%p, %p, %i, %i, %p)", Source, Dest, Message, Length, Data);
 329         if(Dest == NULL) {
 330                 _SysDebug("WM_SendMessage: NULL destination from %p", __builtin_return_address(0));
 331                 return -2;
 332         }
 333         if(Length > 0 && Data == NULL) {
 334                 _SysDebug("WM_SendMessage: non-zero length and NULL data");
 335                 return -1;
 336         }
 337
 338         if( Decorator_HandleMessage(Dest, Message, Length, Data) != 1 )
 339         {
 340                 // TODO: Catch errors from ->HandleMessage
 341 //              _SysDebug("WM_SendMessage: Decorator grabbed message?");
 342                 return 0;
 343         }
 344
 345         // ->HandleMessage returns 1 when the message was not handled
 346         if( Dest->Renderer->HandleMessage(Dest, Message, Length, Data) != 1 )
 347         {
 348                 // TODO: Catch errors from ->HandleMessage
 349 //              _SysDebug("WM_SendMessage: Renderer grabbed message?");
 350                 return 0;
 351         }
 352
 353         // TODO: Implement message masking
 354
 355         // Dispatch to client
 356         if(Dest->Client)
 357         {
 358                 uint32_t        src_id;
 359                 if(!Source)
 360                         src_id = -1;
 361                 else if(Source->Client != Dest->Client) {
 362                         // TODO: Support different client source windows
 363                         _SysDebug("WM_SendMessage: TODO - Support inter-client messages");
 364                         return -1;
 365                 }
 366                 else {
 367                         src_id = Source->ID;
 368                 }
 369
 370 //              _SysDebug("WM_SendMessage: IPC Dispatch");
 371                 IPC_SendWMMessage(Dest->Client, src_id, Dest->ID, Message, Length, Data);
 372         }
 373
 374         return 1;
 375 }
 376
 377 int WM_SendIPCReply(tWindow *Window, int Message, size_t Length, const void *Data)
 378 {
 379         IPC_SendReply(Window->Client, Window->ID, Message, Length, Data);
 380         return 0;
 381 }
 382
 383 void WM_Invalidate(tWindow *Window)
 384 {
 385         if(!Window)     return ;
 386 //      _SysDebug("Invalidating %p", Window);
 387         // Don't invalidate twice (speedup)
 388 //      if( !(Window->Flags & WINFLAG_CLEAN) )  return;
 389
 390         // Mark for re-render
 391         Window->Flags &= ~WINFLAG_CLEAN;
 392
 393         // Mark up the tree that a child window has changed
 394         while( (Window = Window->Parent) )
 395                 Window->Flags &= ~WINFLAG_CHILDCLEAN;
 396 }
 397
 398 // --- Rendering / Update
 399 void WM_int_UpdateWindow(tWindow *Window)
 400 {
 401          int    bDecoratorRedraw = 0;
 402
 403         // Ignore hidden windows
 404         if( !(Window->Flags & WINFLAG_SHOW) )
 405                 return ;
 406
 407         // Render
 408         if( !(Window->Flags & WINFLAG_CLEAN) )
 409         {
 410                 // Calculate RealW/RealH
 411                 if( !(Window->Flags & WINFLAG_NODECORATE) )
 412                 {
 413                         //_SysDebug("Applying decorations to %p", Window);
 414                         Decorator_UpdateBorderSize(Window);
 415                         Window->RealW = Window->BorderL + Window->W + Window->BorderR;
 416                         Window->RealH = Window->BorderT + Window->H + Window->BorderB;
 417                         bDecoratorRedraw = 1;
 418                 }
 419                 else
 420                 {
 421                         Window->BorderL = 0;
 422                         Window->BorderR = 0;
 423                         Window->BorderT = 0;
 424                         Window->BorderB = 0;
 425                         Window->RealW = Window->W;
 426                         Window->RealH = Window->H;
 427                 }
 428
 429                 if( (Window->Flags & WINFLAG_RELATIVE) && Window->Parent )
 430                 {
 431                         Window->RealX = Window->Parent->X + Window->Parent->BorderL + Window->X;
 432                         Window->RealY = Window->Parent->Y + Window->Parent->BorderT + Window->Y;
 433                 }
 434                 else
 435                 {
 436                         Window->RealX = Window->X;
 437                         Window->RealY = Window->Y;
 438                 }
 439
 440                 Window->Renderer->Redraw(Window);
 441                 Window->Flags |= WINFLAG_CLEAN;
 442         }
 443
 444         // Process children
 445         if( !(Window->Flags & WINFLAG_CHILDCLEAN) )
 446         {
 447                 tWindow *child;
 448                 for( child = Window->FirstChild; child; child = child->NextSibling )
 449                 {
 450                         WM_int_UpdateWindow(child);
 451                 }
 452                 Window->Flags |= WINFLAG_CHILDCLEAN;
 453         }
 454
 455         if( bDecoratorRedraw )
 456                 Decorator_Redraw(Window);
 457 }
 458
 459 void WM_int_BlitWindow(tWindow *Window)
 460 {
 461         tWindow *child;
 462
 463         // Ignore hidden windows
 464         if( !(Window->Flags & WINFLAG_SHOW) )
 465                 return ;
 466
 467 //      _SysDebug("Blit %p (%p) to (%i,%i) %ix%i", Window, Window->RenderBuffer,
 468 //              Window->RealX, Window->RealY, Window->RealW, Window->RealH);
 469         Video_Blit(Window->RenderBuffer, Window->RealX, Window->RealY, Window->RealW, Window->RealH);
 470
 471         if( Window == gpWM_FocusedWindow && Window->CursorW )
 472         {
 473                 Video_FillRect(
 474                         Window->RealX + Window->BorderL + Window->CursorX,
 475                         Window->RealY + Window->BorderT + Window->CursorY,
 476                         Window->CursorW, Window->CursorH,
 477                         0x000000
 478                         );
 479         }
 480
 481         for( child = Window->FirstChild; child; child = child->NextSibling )
 482         {
 483                 WM_int_BlitWindow(child);
 484         }
 485 }
 486
 487 void WM_Update(void)
 488 {
 489         // Don't redraw if nothing has changed
 490         if( (gpWM_RootWindow->Flags & WINFLAG_CHILDCLEAN) )
 491                 return ;
 492
 493         // - Iterate through visible windows, updating them as needed
 494         WM_int_UpdateWindow(gpWM_RootWindow);
 495
 496         // - Draw windows from back to front to the render buffer
 497         WM_int_BlitWindow(gpWM_RootWindow);
 498
 499         Video_Update();
 500 }
 501