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
  19 // === GLOBALS ===
  20 tWMRenderer     *gpWM_Renderers;
  21 tWindow *gpWM_RootWindow;
  22 //! Window which will recieve the next keyboard event
  23 tWindow *gpWM_FocusedWindow;
  24
  25 // === CODE ===
  26 void WM_Initialise(void)
  27 {
  28         WM_CreateWindow(NULL, NULL, 0, 0x0088FF, "Background");
  29         gpWM_RootWindow->W = giScreenWidth;
  30         gpWM_RootWindow->H = giScreenHeight;
  31         gpWM_RootWindow->Flags = WINFLAG_SHOW|WINFLAG_NODECORATE;
  32 }
  33
  34 void WM_RegisterRenderer(tWMRenderer *Renderer)
  35 {
  36         // TODO: Catch out duplicates
  37         Renderer->Next = gpWM_Renderers;
  38         gpWM_Renderers = Renderer;
  39 }
  40
  41 // --- Manipulation
  42 tWindow *WM_CreateWindow(tWindow *Parent, tIPC_Client *Client, uint32_t ID, int RendererArg, const char *RendererName)
  43 {
  44         tWMRenderer     *renderer;
  45         tWindow *ret;
  46
  47         // - Get Renderer
  48         for( renderer = gpWM_Renderers; renderer; renderer = renderer->Next )
  49         {
  50                 if(strcmp(RendererName, renderer->Name) == 0)
  51                         break;
  52         }
  53         if(renderer == NULL)
  54                 return NULL;
  55
  56         if(!Parent)
  57                 Parent = gpWM_RootWindow;
  58
  59         // - Call create window function
  60         ret = renderer->CreateWindow(RendererArg);
  61         ret->Client = Client;
  62         ret->ID = ID;
  63         ret->Parent = Parent;
  64         ret->Renderer = renderer;
  65         ret->Flags |= WINFLAG_CLEAN;    // Needed to stop invaildate early exiting
  66
  67         // Append to parent
  68         if(Parent)
  69         {
  70                 if(Parent->LastChild)
  71                         Parent->LastChild->NextSibling = ret;
  72                 else
  73                         Parent->FirstChild = ret;
  74                 ret->PrevSibling = Parent->LastChild;
  75                 Parent->LastChild = ret;
  76                 ret->NextSibling = NULL;
  77         }
  78         else
  79         {
  80                 gpWM_RootWindow = ret;
  81         }
  82
  83         // Don't decorate child windows by default
  84         if(Parent != gpWM_RootWindow)
  85         {
  86                 ret->Flags |= WINFLAG_NODECORATE;
  87         }
  88
  89         // - Return!
  90         return ret;
  91 }
  92
  93 tWindow *WM_CreateWindowStruct(size_t ExtraSize)
  94 {
  95         tWindow *ret;
  96
  97         ret = calloc( sizeof(tWindow) + ExtraSize, 1 );
  98         ret->RendererInfo = ret + 1;    // Get end of tWindow
  99
 100         return ret;
 101 }
 102
 103 void WM_SetWindowTitle(tWindow *Window, const char *Title)
 104 {
 105         if(Window->Title)
 106                 free(Window->Title);
 107         Window->Title = strdup(Title);
 108         _SysDebug("Window %p title set to '%s'", Window, Title);
 109 }
 110
 111 void WM_RaiseWindow(tWindow *Window)
 112 {
 113         tWindow *parent = Window->Parent;
 114         if(!Window->Parent)     return ;
 115
 116         // Remove from list
 117         if(Window->PrevSibling)
 118                 Window->PrevSibling->NextSibling = Window->NextSibling;
 119         if(Window->NextSibling)
 120                 Window->NextSibling->PrevSibling = Window->PrevSibling;
 121         if(parent->FirstChild == Window)
 122                 parent->FirstChild = Window->NextSibling;
 123         if(parent->LastChild == Window)
 124                 parent->LastChild = Window->PrevSibling;
 125
 126         // Append to end
 127         if(parent->LastChild)
 128                 parent->LastChild->NextSibling = Window;
 129         else
 130                 parent->FirstChild = Window;
 131         Window->PrevSibling = parent->LastChild;
 132         Window->NextSibling = NULL;
 133         parent->LastChild = Window;
 134 }
 135
 136 void WM_FocusWindow(tWindow *Destination)
 137 {
 138         struct sWndMsg_Bool     _msg;
 139
 140         if( gpWM_FocusedWindow == Destination )
 141                 return ;
 142         if( Destination && !(Destination->Flags & WINFLAG_SHOW) )
 143                 return ;
 144
 145         _msg.Val = 0;
 146         WM_SendMessage(NULL, gpWM_FocusedWindow, WNDMSG_FOCUS, sizeof(_msg), &_msg);
 147         _msg.Val = 1;
 148         WM_SendMessage(NULL, Destination, WNDMSG_FOCUS, sizeof(_msg), &_msg);
 149
 150         gpWM_FocusedWindow = Destination;
 151 }
 152
 153
 154 void WM_ShowWindow(tWindow *Window, int bShow)
 155 {
 156         // Message window
 157         struct sWndMsg_Bool     _msg;
 158
 159         if( !!(Window->Flags & WINFLAG_SHOW) == bShow )
 160                 return ;
 161
 162         _msg.Val = !!bShow;
 163         WM_SendMessage(NULL, Window, WNDMSG_SHOW, sizeof(_msg), &_msg);
 164
 165         if(bShow)
 166                 Window->Flags |= WINFLAG_SHOW;
 167         else {
 168                 Window->Flags &= ~WINFLAG_SHOW;
 169                 if( Window == gpWM_FocusedWindow )
 170                         WM_FocusWindow(Window->Parent);
 171         }
 172         // Just a little memory saving for large hidden windows
 173         if(Window->RenderBuffer) {
 174                 free(Window->RenderBuffer);
 175                 Window->RenderBuffer = NULL;
 176         }
 177
 178         WM_Invalidate(Window);
 179 }
 180
 181 void WM_DecorateWindow(tWindow *Window, int bDecorate)
 182 {
 183         if( !(Window->Flags & WINFLAG_NODECORATE) == !!bDecorate )
 184                 return ;
 185
 186         if(bDecorate)
 187                 Window->Flags &= ~WINFLAG_NODECORATE;
 188         else
 189                 Window->Flags |= WINFLAG_NODECORATE;
 190
 191         // Needed because the window size changes
 192         if(Window->RenderBuffer) {
 193                 free(Window->RenderBuffer);
 194                 Window->RenderBuffer = NULL;
 195         }
 196
 197         WM_Invalidate(Window);
 198 }
 199
 200 int WM_MoveWindow(tWindow *Window, int X, int Y)
 201 {
 202         // Clip coordinates
 203         if(X + Window->W < 0)   X = -Window->W + 1;
 204         if(Y + Window->H < 0)   Y = -Window->H + 1;
 205         if(X >= giScreenWidth)  X = giScreenWidth - 1;
 206         if(Y >= giScreenHeight) Y = giScreenHeight - 1;
 207
 208         Window->X = X;  Window->Y = Y;
 209
 210         WM_Invalidate(Window);
 211
 212         return 0;
 213 }
 214
 215 int WM_ResizeWindow(tWindow *Window, int W, int H)
 216 {
 217         if(W <= 0 || H <= 0 )   return 1;
 218         if(Window->X + W < 0)   Window->X = -W + 1;
 219         if(Window->Y + H < 0)   Window->Y = -H + 1;
 220
 221         Window->W = W;  Window->H = H;
 222
 223         if(Window->RenderBuffer) {
 224                 free(Window->RenderBuffer);
 225                 Window->RenderBuffer = NULL;
 226         }
 227         WM_Invalidate(Window);
 228
 229         {
 230                 struct sWndMsg_Resize   msg;
 231                 msg.W = W;
 232                 msg.H = H;
 233                 WM_SendMessage(NULL, Window, WNDMSG_RESIZE, sizeof(msg), &msg);
 234         }
 235
 236         return 0;
 237 }
 238
 239 int WM_SendMessage(tWindow *Source, tWindow *Dest, int Message, int Length, const void *Data)
 240 {
 241         if(Dest == NULL)        return -2;
 242         if(Length > 0 && Data == NULL)  return -1;
 243
 244         if( Decorator_HandleMessage(Dest, Message, Length, Data) != 1 )
 245         {
 246                 // TODO: Catch errors from ->HandleMessage
 247                 return 0;
 248         }
 249
 250         // ->HandleMessage returns 1 when the message was not handled
 251         if( Dest->Renderer->HandleMessage(Dest, Message, Length, Data) != 1 )
 252         {
 253                 // TODO: Catch errors from ->HandleMessage
 254                 return 0;
 255         }
 256
 257         // TODO: Implement message masking
 258
 259         if(Dest->Client)
 260         {
 261                 uint32_t        src_id;
 262                 if(!Source)
 263                         src_id = -1;
 264                 else if(Source->Client != Dest->Client) {
 265                         // TODO: Support different client source windows
 266                         _SysDebug("WM_SendMessage: TODO - Support inter-client messages");
 267                         return -1;
 268                 }
 269                 else {
 270                         src_id = Source->ID;
 271                 }
 272
 273                 IPC_SendWMMessage(Dest->Client, src_id, Dest->ID, Message, Length, Data);
 274         }
 275
 276         return 1;
 277 }
 278
 279 void WM_Invalidate(tWindow *Window)
 280 {
 281         _SysDebug("Invalidating %p", Window);
 282         // Don't invalidate twice (speedup)
 283 //      if( !(Window->Flags & WINFLAG_CLEAN) )  return;
 284
 285         // Mark for re-render
 286         Window->Flags &= ~WINFLAG_CLEAN;
 287
 288         // Mark up the tree that a child window has changed
 289         while( (Window = Window->Parent) )
 290                 Window->Flags &= ~WINFLAG_CHILDCLEAN;
 291 }
 292
 293 // --- Rendering / Update
 294 void WM_int_UpdateWindow(tWindow *Window)
 295 {
 296         tWindow *child;
 297
 298         // Ignore hidden windows
 299         if( !(Window->Flags & WINFLAG_SHOW) )
 300                 return ;
 301
 302         // Render
 303         if( !(Window->Flags & WINFLAG_CLEAN) )
 304         {
 305                 // Calculate RealW/RealH
 306                 if( !(Window->Flags & WINFLAG_NODECORATE) )
 307                 {
 308                         _SysDebug("Applying decorations to %p", Window);
 309                         Decorator_UpdateBorderSize(Window);
 310                         Window->RealW = Window->BorderL + Window->W + Window->BorderR;
 311                         Window->RealH = Window->BorderT + Window->H + Window->BorderB;
 312                         Decorator_Redraw(Window);
 313                 }
 314                 else
 315                 {
 316                         Window->BorderL = 0;
 317                         Window->BorderR = 0;
 318                         Window->BorderT = 0;
 319                         Window->BorderB = 0;
 320                         Window->RealW = Window->W;
 321                         Window->RealH = Window->H;
 322                 }
 323
 324                 Window->Renderer->Redraw(Window);
 325                 Window->Flags |= WINFLAG_CLEAN;
 326         }
 327
 328         // Process children
 329         if( !(Window->Flags & WINFLAG_CHILDCLEAN) )
 330         {
 331                 for( child = Window->FirstChild; child; child = child->NextSibling )
 332                 {
 333                         WM_int_UpdateWindow(child);
 334                 }
 335                 Window->Flags |= WINFLAG_CHILDCLEAN;
 336         }
 337
 338 }
 339
 340 void WM_int_BlitWindow(tWindow *Window)
 341 {
 342         tWindow *child;
 343
 344         // Ignore hidden windows
 345         if( !(Window->Flags & WINFLAG_SHOW) )
 346                 return ;
 347
 348         _SysDebug("Blit %p to (%i,%i) %ix%i", Window, Window->X, Window->Y, Window->RealW, Window->RealH);
 349         Video_Blit(Window->RenderBuffer, Window->X, Window->Y, Window->RealW, Window->RealH);
 350
 351         for( child = Window->FirstChild; child; child = child->NextSibling )
 352         {
 353                 WM_int_BlitWindow(child);
 354         }
 355 }
 356
 357 void WM_Update(void)
 358 {
 359         // Don't redraw if nothing has changed
 360         if( (gpWM_RootWindow->Flags & WINFLAG_CHILDCLEAN) )
 361                 return ;
 362
 363         // - Iterate through visible windows, updating them as needed
 364         WM_int_UpdateWindow(gpWM_RootWindow);
 365
 366         // - Draw windows from back to front to the render buffer
 367         WM_int_BlitWindow(gpWM_RootWindow);
 368
 369         Video_Update();
 370 }
 371