Kernel/vfs - Better handling of -1 in handle list
[tpg/acess2.git] / Usermode / Applications / axwin3_src / libaxwin3.so_src / wm.c
1 /*
2  * AxWin3 Interface Library
3  * - By John Hodge (thePowersGang)
4  *
5  * wm.c
6  * - Core window management functions
7  */
8 #include <axwin3/axwin.h>
9 #include <stdlib.h>
10 #include <string.h>
11 #include "include/internal.h"
12 #include "include/ipc.h"
13 #include <wm_messages.h>
14
15 #define WINDOWS_PER_ALLOC       (64-1)  // -1 to make it 64 pointers (+ Next)
16 #define MAX_HOTKEYS     32
17
18 typedef struct sWindowBlock     tWindowBlock;
19
20 typedef struct sAxWin3_Window   tWindow;
21
22 // === STRUCTURES ===
23 struct sWindowBlock
24 {
25         tWindowBlock    *Next;
26         tWindow *Windows[WINDOWS_PER_ALLOC];
27 };
28
29 // === GLOBALS ===
30  int    giAxWin3_LowestFreeWinID;
31  int    giAxWin3_HighestUsedWinID;
32 tWindowBlock    gAxWin3_WindowList;
33 tAxWin3_HotkeyCallback  gAxWin3_Hotkeys[MAX_HOTKEYS];
34
35 // === CODE ===
36 tWindow *AxWin3_int_CreateWindowStruct(uint32_t ServerID, int ExtraBytes)
37 {
38         tWindow *ret;
39         
40         ret = calloc(sizeof(tWindow) + ExtraBytes, 1);
41         ret->ServerID = ServerID;
42
43         return ret;
44 }
45
46 tWindow *AxWin3_int_GetWindowFromID(uint32_t ServerID)
47 {
48         tWindowBlock    *block = &gAxWin3_WindowList;
49         while(block && ServerID > WINDOWS_PER_ALLOC) {
50                 block = block->Next;
51                 ServerID -= WINDOWS_PER_ALLOC;
52         }
53         if(!block)      return NULL;
54         return block->Windows[ServerID];
55 }
56
57 tWindow *AxWin3_int_AllocateWindowInfo(int DataBytes, int *WinID)
58 {
59          int    idx, newWinID;
60         tWindowBlock *block, *prev = NULL;
61         tWindow *ret;   
62
63         block = &gAxWin3_WindowList;
64         newWinID = giAxWin3_LowestFreeWinID;
65         for( idx = 0; block; newWinID ++ )
66         {
67                 if( block->Windows[idx] == NULL )
68                         break;
69                 idx ++;
70                 if(idx == WINDOWS_PER_ALLOC) {
71                         prev = block;
72                         block = block->Next;
73                         idx = 0;
74                 }
75         }
76         
77         if( !block )
78         {
79                 block = calloc(sizeof(tWindowBlock), 1);
80                 prev->Next = block;
81                 idx = 0;
82         }
83         
84         ret = block->Windows[idx] = AxWin3_int_CreateWindowStruct(newWinID, DataBytes);
85         if(newWinID > giAxWin3_HighestUsedWinID)
86                 giAxWin3_HighestUsedWinID = newWinID;
87         if(newWinID == giAxWin3_LowestFreeWinID)
88                 giAxWin3_HighestUsedWinID ++;
89
90         if(WinID)       *WinID = newWinID;
91
92         return ret;
93 }
94
95 int AxWin3_GetDisplayCount(void)
96 {
97         tAxWin_IPCMessage       *msg;
98         tIPCMsg_ReturnInt       *ret;
99          int    rv;
100         
101         msg = AxWin3_int_AllocateIPCMessage(NULL, IPCMSG_GETDISPLAYCOUNT, IPCMSG_FLAG_RETURN, 0);
102         AxWin3_int_SendIPCMessage(msg);
103         free(msg);      
104
105         msg = AxWin3_int_WaitIPCMessage(IPCMSG_GETDISPLAYCOUNT);
106         if(msg->Size < sizeof(*ret))    return -1;
107         ret = (void*)msg->Data;
108         rv = ret->Value;
109         free(msg);
110         return rv;
111 }
112
113 int AxWin3_GetDisplayDims(int Display, int *X, int *Y, int *Width, int *Height)
114 {
115         tAxWin_IPCMessage       *msg;
116         tIPCMsg_GetDisplayDims  *req;
117         tIPCMsg_RetDisplayDims  *ret;
118         
119         msg = AxWin3_int_AllocateIPCMessage(NULL, IPCMSG_GETDISPLAYDIMS, IPCMSG_FLAG_RETURN, sizeof(*req));
120         req = (void*)msg->Data;
121         req->DisplayID = Display;
122         AxWin3_int_SendIPCMessage(msg);
123         free(msg);
124
125         msg = AxWin3_int_WaitIPCMessage(IPCMSG_GETDISPLAYDIMS);
126         if(msg->Size < sizeof(*ret))    return -1;
127         ret = (void*)msg->Data;
128         
129         if(X)   *X = ret->X;
130         if(Y)   *Y = ret->Y;
131         if(Width)       *Width = ret->W;
132         if(Height)      *Height = ret->H;
133         
134         return 0;
135 }
136
137 tHWND AxWin3_CreateWindow(
138         tHWND Parent, const char *Renderer, int RendererArg,
139         int DataBytes, tAxWin3_WindowMessageHandler MessageHandler
140         )
141 {
142         tWindow *ret;
143          int    newWinID;
144          int    dataSize = sizeof(tIPCMsg_CreateWin) + strlen(Renderer) + 1;
145         tAxWin_IPCMessage       *msg;
146         tIPCMsg_CreateWin       *create_win;
147
148         // Allocate a window ID
149         ret = AxWin3_int_AllocateWindowInfo(DataBytes, &newWinID);
150         if(!ret)        return NULL;
151         ret->Handler = MessageHandler;
152
153         // Create message
154         msg = AxWin3_int_AllocateIPCMessage(Parent, IPCMSG_CREATEWIN, 0, dataSize);
155         create_win = (void*)msg->Data;  
156         create_win->NewWinID = newWinID;
157         create_win->RendererArg = RendererArg;
158         strcpy(create_win->Renderer, Renderer);
159
160         // Send and clean up
161         AxWin3_int_SendIPCMessage(msg);
162         free(msg);
163
164         _SysDebug("AxWin3_CreateWindow: %i :: '%s'", newWinID, Renderer);
165
166         // TODO: Detect and handle possible errors
167
168         // Return success
169         return ret;
170 }
171
172 void AxWin3_DestroyWindow(tHWND Window)
173 {
174         tAxWin_IPCMessage       *msg;
175         
176         msg = AxWin3_int_AllocateIPCMessage(Window, IPCMSG_DESTROYWIN, 0, 0);
177         AxWin3_int_SendIPCMessage(msg);
178         free(msg);
179 }
180
181 void *AxWin3_int_GetDataPtr(tHWND Window)
182 {
183         return Window->Data;
184 }
185
186 void AxWin3_int_HandleMessage(tAxWin_IPCMessage *Msg)
187 {
188         tWindow *dest;
189
190         dest = AxWin3_int_GetWindowFromID(Msg->Window);
191
192         switch(Msg->ID)
193         {
194         case IPCMSG_SENDMSG: {
195                 tIPCMsg_SendMsg *info = (void*)Msg->Data;
196                 if(Msg->Size < sizeof(*info) || Msg->Size < sizeof(*info) + info->Length) {
197                         _SysDebug("Message is undersized (%i < %i + %i)",
198                                 Msg->Size < sizeof(*info), info->Length);
199                         return ;
200                 }
201                 if(!dest || !dest->Handler) {
202                         _SysDebug("No handler for destination %p", dest);
203                         return ;
204                 }
205                 _SysDebug("IPC Message 0x%x - %i bytes", info->ID, info->Length);
206
207                 if( dest->Handler(dest, info->ID, info->Length, info->Data) )
208                         ;
209                 else {
210                         switch( info->ID )
211                         {
212                         case WNDMSG_HOTKEY: {
213                                 const struct sWndMsg_Hotkey *mi = (void*)info->Data;
214                                 if( mi->ID >= MAX_HOTKEYS ) 
215                                         ;       // TODO: Error when hotkey is out of range
216                                 else if( gAxWin3_Hotkeys[mi->ID] == 0 )
217                                         _SysDebug("--- Unmapped hotkey ID %i fired", mi->ID);
218                                 else
219                                         gAxWin3_Hotkeys[mi->ID]();
220                                 }break;
221                         default:
222                                 _SysDebug("--- Unhandled SENDMSG 0x%x win %i", info->ID, Msg->Window);
223                                 break;
224                         }
225                 }
226                 break; }
227         default:
228                 _SysDebug("Unknow message ID %i", Msg->ID);
229                 break;
230         }
231         
232         free(Msg);
233 }
234
235 void AxWin3_SetWindowTitle(tHWND Window, const char *Title)
236 {
237         tAxWin_IPCMessage       *msg;
238          int    len = strlen(Title);
239         
240         msg = AxWin3_int_AllocateIPCMessage(Window, IPCMSG_SETWINTITLE, 0, len+1);
241         strcpy(msg->Data, Title);
242         
243         AxWin3_int_SendIPCMessage(msg);
244         
245         free(msg);
246 }
247
248 void AxWin3_SendMessage(tHWND Window, tHWND Destination, int Message, int Length, void *Data)
249 {
250         tAxWin_IPCMessage       *msg;
251         tIPCMsg_SendMsg *info;
252         
253         msg = AxWin3_int_AllocateIPCMessage(Window, IPCMSG_SENDMSG, 0, sizeof(*info)+Length);
254         info = (void*)msg->Data;
255         info->Remote = AxWin3_int_GetWindowID(Destination);
256         info->ID = Message;
257         info->Length = Length;
258         memcpy(info->Data, Data, Length);
259         
260         AxWin3_int_SendIPCMessage(msg);
261         free(msg);
262 }
263
264 void *AxWin3_WaitMessage(tHWND Window, int MessageID, size_t *Length)
265 {
266         tAxWin_IPCMessage       *msg;
267         
268         for( ;; )
269         {
270                 msg = AxWin3_int_WaitIPCMessage(IPCMSG_SENDMSG);
271                 if( msg->Window != AxWin3_int_GetWindowID(Window) ) {
272                         AxWin3_int_HandleMessage(msg);
273                         continue ;
274                 }
275                 tIPCMsg_SendMsg *info = (void*)msg->Data;
276                 if( info->ID != MessageID ) {
277                         AxWin3_int_HandleMessage(msg);
278                         continue ;
279                 }
280
281                 *Length = info->Length;
282                 void    *ret = malloc(info->Length);    
283                 memcpy(ret, info->Data, info->Length);
284                 free(msg);
285         
286                 return ret;
287         }
288 }
289
290 void AxWin3_SendIPC(tHWND Window, int Message, size_t Length, const void *Data)
291 {
292         tAxWin_IPCMessage       *msg;
293         
294         msg = AxWin3_int_AllocateIPCMessage(Window, Message, IPCMSG_FLAG_RENDERER, Length);
295         memcpy(msg->Data, Data, Length);
296         AxWin3_int_SendIPCMessage(msg);
297         free(msg);
298 }
299
300 void *AxWin3_WaitIPCMessage(tHWND Window, int MessageID, size_t *Length)
301 {
302         tAxWin_IPCMessage       *msg;
303         for( ;; )
304         {
305                 msg = AxWin3_int_WaitIPCMessage(MessageID);
306                 if( !(msg->Flags & IPCMSG_FLAG_RENDERER) || msg->Window != AxWin3_int_GetWindowID(Window) ) {
307                         AxWin3_int_HandleMessage(msg);
308                         continue ;
309                 }
310
311                 *Length = msg->Size;
312                 void    *ret = malloc(msg->Size);
313                 memcpy(ret, msg->Data, msg->Size);
314                 free(msg);
315         
316                 return ret;
317         }
318 }
319
320 void AxWin3_FocusWindow(tHWND Window)
321 {
322         tAxWin_IPCMessage       *msg;
323         
324         msg = AxWin3_int_AllocateIPCMessage(Window, IPCMSG_FOCUSWINDOW, 0, 0);
325         
326         AxWin3_int_SendIPCMessage(msg);
327         free(msg);
328 }
329
330 void AxWin3_ShowWindow(tHWND Window, int bShow)
331 {
332         tAxWin_IPCMessage       *msg;
333         tIPCMsg_Boolean *info;
334
335         msg = AxWin3_int_AllocateIPCMessage(Window, IPCMSG_SHOWWINDOW, 0, sizeof(*info));
336         info = (void*)msg->Data;
337         info->Value = !!bShow;
338         
339         AxWin3_int_SendIPCMessage(msg);
340         
341         free(msg);
342 }
343
344 void AxWin3_DecorateWindow(tHWND Window, int bDecorate)
345 {
346         tAxWin_IPCMessage       *msg;
347         tIPCMsg_Boolean *info;
348
349         msg = AxWin3_int_AllocateIPCMessage(Window, IPCMSG_DECORATEWINDOW, 0, sizeof(*info));
350         info = (void*)msg->Data;
351         info->Value = !!bDecorate;
352         
353         AxWin3_int_SendIPCMessage(msg);
354         
355         free(msg);
356 }
357
358 void AxWin3_SetWindowPos(tHWND Window, short X, short Y, short W, short H)
359 {
360         tAxWin_IPCMessage       *msg;
361         tIPCMsg_SetWindowPos    *info;
362         
363         msg = AxWin3_int_AllocateIPCMessage(Window, IPCMSG_SETWINPOS, 0, sizeof(*info));
364         info = (void*)msg->Data;
365
366         info->bSetPos = 1;
367         info->bSetDims = 1;
368         info->X = X;    info->Y = Y;
369         info->W = W;    info->H = H;
370
371         AxWin3_int_SendIPCMessage(msg); 
372         free(msg);
373 }
374
375 void AxWin3_MoveWindow(tHWND Window, short X, short Y)
376 {
377         tAxWin_IPCMessage       *msg;
378         tIPCMsg_SetWindowPos    *info;
379         
380         msg = AxWin3_int_AllocateIPCMessage(Window, IPCMSG_SETWINPOS, 0, sizeof(*info));
381         info = (void*)msg->Data;
382
383         info->bSetPos = 1;
384         info->bSetDims = 0;
385         info->X = X;
386         info->Y = Y;
387         
388         AxWin3_int_SendIPCMessage(msg);
389         
390         free(msg);
391 }
392
393 void AxWin3_ResizeWindow(tHWND Window, short W, short H)
394 {
395         tAxWin_IPCMessage       *msg;
396         tIPCMsg_SetWindowPos    *info;
397         
398         msg = AxWin3_int_AllocateIPCMessage(Window, IPCMSG_SETWINPOS, 0, sizeof(*info));
399         info = (void*)msg->Data;
400
401         info->bSetPos = 0;
402         info->bSetDims = 1;
403         info->W = W;
404         info->H = H;
405         
406         AxWin3_int_SendIPCMessage(msg);
407         
408         free(msg);
409 }
410
411 int AxWin3_RegisterAction(tHWND Window, const char *Action, tAxWin3_HotkeyCallback cb)
412 {
413          int    i;
414         for( i = 0; i < MAX_HOTKEYS; i ++ )
415         {
416                 if( gAxWin3_Hotkeys[i] == NULL )
417                 {
418                         tAxWin_IPCMessage       *msg;
419                         struct sIPCMsg_RegAction        *info;
420                         gAxWin3_Hotkeys[i] = cb;
421                         
422                         msg = AxWin3_int_AllocateIPCMessage(Window, IPCMSG_REGACTION, 0, sizeof(*info)+strlen(Action)+1);
423                         info = (void*)msg->Data;
424                 
425                         info->Index = i;
426                         strcpy(info->Action, Action);
427                         
428                         AxWin3_int_SendIPCMessage(msg);
429                         free(msg);
430                         return i;
431                 }
432         }
433         return -1;
434 }
435

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