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- Let the subclassing stack grow the opposite way to make the code 

more transparent.
- Remove SubclassWndProc and move its logic to DefSubclassProc.
This commit is contained in:
Filip Navara 2004-05-17 19:48:24 +00:00 committed by Alexandre Julliard
parent 56b5164686
commit c8aba95f50
2 changed files with 41 additions and 73 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
dlls/comctl32/comctl32.h
View File

@ -154,7 +154,7 @@ typedef struct
} SubclassProcs[31];
int stackpos;
int stacknum;
int stacknew;
int wndprocrecursion;
WNDPROC origproc;
} SUBCLASS_INFO, *LPSUBCLASS_INFO;

112
dlls/comctl32/commctrl.c
View File

@ -114,7 +114,6 @@ extern void TREEVIEW_Unregister(void);
extern void UPDOWN_Register(void);
extern void UPDOWN_Unregister(void);
static LRESULT WINAPI SubclassWndProc (HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam);
LPSTR COMCTL32_aSubclass = NULL;
HMODULE COMCTL32_hModule = 0;
@ -1085,7 +1084,7 @@ BOOL WINAPI SetWindowSubclass (HWND hWnd, SUBCLASSPROC pfnSubclass,
UINT_PTR uIDSubclass, DWORD_PTR dwRef)
{
LPSUBCLASS_INFO stack;
int newnum, n;
int n;
TRACE ("(%p, %p, %x, %lx)\n", hWnd, pfnSubclass, uIDSubclass, dwRef);
@ -1109,10 +1108,10 @@ BOOL WINAPI SetWindowSubclass (HWND hWnd, SUBCLASSPROC pfnSubclass,
/* set window procedure to our own and save the current one */
if (IsWindowUnicode (hWnd))
stack->origproc = (WNDPROC)SetWindowLongW (hWnd, GWL_WNDPROC,
(LONG)SubclassWndProc);
(LONG)DefSubclassProc);
else
stack->origproc = (WNDPROC)SetWindowLongA (hWnd, GWL_WNDPROC,
(LONG)SubclassWndProc);
(LONG)DefSubclassProc);
} else {
WNDPROC current;
if (IsWindowUnicode (hWnd))
@ -1120,7 +1119,7 @@ BOOL WINAPI SetWindowSubclass (HWND hWnd, SUBCLASSPROC pfnSubclass,
else
current = (WNDPROC)GetWindowLongA (hWnd, GWL_WNDPROC);
if (current != SubclassWndProc) {
if (current != DefSubclassProc) {
ERR ("Application has subclassed with our procedure, then manually, then with us again. The current implementation can't handle this.\n");
return FALSE;
}
@ -1128,32 +1127,28 @@ BOOL WINAPI SetWindowSubclass (HWND hWnd, SUBCLASSPROC pfnSubclass,
/* Check to see if we have called this function with the same uIDSubClass
* and pfnSubclass */
for (n = 0; n <= stack->stacknum + stack->stacknew - 1; n++)
for (n = 0; n < stack->stacknum; n++)
if ((stack->SubclassProcs[n].id == uIDSubclass) &&
(stack->SubclassProcs[n].subproc == pfnSubclass)) {
stack->SubclassProcs[n].ref = dwRef;
return TRUE;
}
if ((stack->stacknum + stack->stacknew) >= 32) {
if (stack->stacknum >= 32) {
ERR ("We have a Subclass stack overflow, please increment size\n");
return FALSE;
}
/* we can't simply increment both stackpos and stacknum because there might
* be a window procedure running lower in the stack, we can only get them
* up to date once the last window procedure has run */
if (stack->stacknum == stack->stackpos) {
stack->stacknum++;
memmove (&stack->SubclassProcs[1], &stack->SubclassProcs[0],
sizeof(stack->SubclassProcs[0]) * stack->stacknum);
stack->stacknum++;
if (stack->wndprocrecursion)
stack->stackpos++;
} else
stack->stacknew++;
newnum = stack->stacknew + stack->stacknum - 1;
stack->SubclassProcs[newnum].subproc = pfnSubclass;
stack->SubclassProcs[newnum].ref = dwRef;
stack->SubclassProcs[newnum].id = uIDSubclass;
stack->SubclassProcs[0].subproc = pfnSubclass;
stack->SubclassProcs[0].ref = dwRef;
stack->SubclassProcs[0].id = uIDSubclass;
return TRUE;
}
@ -1188,7 +1183,7 @@ BOOL WINAPI GetWindowSubclass (HWND hWnd, SUBCLASSPROC pfnSubclass,
if (!stack)
return FALSE;
for (n = 0; n <= stack->stacknum + stack->stacknew - 1; n++)
for (n = 0; n < stack->stacknum; n++)
if ((stack->SubclassProcs[n].id == uID) &&
(stack->SubclassProcs[n].subproc == pfnSubclass)) {
*pdwRef = stack->SubclassProcs[n].ref;
@ -1226,7 +1221,8 @@ BOOL WINAPI RemoveWindowSubclass(HWND hWnd, SUBCLASSPROC pfnSubclass, UINT_PTR u
if (!stack)
return FALSE;
if ((stack->stacknum == 1) && (stack->stackpos == 1) && !stack->stacknew) {
if ((stack->stacknum == 1) && (stack->stackpos == 1) &&
!stack->wndprocrecursion) {
TRACE("Last Subclass removed, cleaning up\n");
/* clean up our heap and reset the origional window procedure */
if (IsWindowUnicode (hWnd))
@ -1238,24 +1234,21 @@ BOOL WINAPI RemoveWindowSubclass(HWND hWnd, SUBCLASSPROC pfnSubclass, UINT_PTR u
return TRUE;
}
for (n = stack->stacknum + stack->stacknew - 1; n >= 0; n--)
for (n = stack->stacknum - 1; n >= 0; n--)
if ((stack->SubclassProcs[n].id == uID) &&
(stack->SubclassProcs[n].subproc == pfnSubclass)) {
if (n != (stack->stacknum + stack->stacknew))
if (n != stack->stacknum)
/* Fill the hole in the stack */
memmove (&stack->SubclassProcs[n], &stack->SubclassProcs[n + 1],
sizeof(stack->SubclassProcs[0]) * (stack->stacknew + stack->stacknum - n));
sizeof(stack->SubclassProcs[0]) * (stack->stacknum - n));
stack->SubclassProcs[n].subproc = NULL;
stack->SubclassProcs[n].ref = 0;
stack->SubclassProcs[n].id = 0;
/* If we are currently running a window procedure we have to manipulate
* the stack position pointers so that we don't corrupt the stack */
if ((n < stack->stackpos) || (stack->stackpos == stack->stacknum)) {
stack->stacknum--;
stack->stacknum--;
if (n < stack->stackpos && stack->wndprocrecursion)
stack->stackpos--;
} else if (n >= stack->stackpos)
stack->stacknew--;
return TRUE;
}
@ -1263,33 +1256,6 @@ BOOL WINAPI RemoveWindowSubclass(HWND hWnd, SUBCLASSPROC pfnSubclass, UINT_PTR u
}
/***********************************************************************
* SubclassWndProc (internal)
*
* Window procedure for all subclassed windows.
* Saves the current subclassing stack position to support nested messages
*/
static LRESULT WINAPI SubclassWndProc (HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
LPSUBCLASS_INFO stack;
int stackpos;
LRESULT ret;
/* retrieve our little stack from the Properties */
stack = (LPSUBCLASS_INFO)GetPropA (hWnd, COMCTL32_aSubclass);
if (!stack) {
ERR ("Our sub classing stack got erased for %p!! Nothing we can do\n", hWnd);
return 0;
}
stackpos = stack->stackpos;
stack->stackpos = stack->stacknum;
ret = DefSubclassProc(hWnd,uMsg,wParam,lParam);
stack->stackpos = stackpos;
return ret;
}
/***********************************************************************
* DefSubclassProc [COMCTL32.413]
*
@ -1309,7 +1275,6 @@ static LRESULT WINAPI SubclassWndProc (HWND hWnd, UINT uMsg, WPARAM wParam, LPAR
LRESULT WINAPI DefSubclassProc (HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
LPSUBCLASS_INFO stack;
int stackpos;
LRESULT ret;
/* retrieve our little stack from the Properties */
@ -1319,24 +1284,27 @@ LRESULT WINAPI DefSubclassProc (HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lPar
return 0;
}
/* If we are at pos 0 then we have to call the origional window procedure */
if (stack->stackpos == 0) {
stack->wndprocrecursion++;
/* If we are at the end of stack then we have to call the original
* window procedure */
if (stack->stackpos == stack->stacknum) {
if (IsWindowUnicode (hWnd))
return CallWindowProcW (stack->origproc, hWnd, uMsg, wParam, lParam);
ret = CallWindowProcW (stack->origproc, hWnd, uMsg, wParam, lParam);
else
return CallWindowProcA (stack->origproc, hWnd, uMsg, wParam, lParam);
ret = CallWindowProcA (stack->origproc, hWnd, uMsg, wParam, lParam);
} else {
stack->stackpos++;
/* call the Subclass procedure from the stack */
ret = stack->SubclassProcs[stack->stackpos - 1].subproc (hWnd, uMsg, wParam, lParam,
stack->SubclassProcs[stack->stackpos - 1].id, stack->SubclassProcs[stack->stackpos - 1].ref);
stack->stackpos--;
}
stackpos = --stack->stackpos;
/* call the Subclass procedure from the stack */
ret = stack->SubclassProcs[stackpos].subproc (hWnd, uMsg, wParam, lParam,
stack->SubclassProcs[stackpos].id, stack->SubclassProcs[stackpos].ref);
stack->stackpos++;
if ((stack->stackpos == stack->stacknum) && stack->stacknew) {
stack->stacknum += stack->stacknew;
stack->stackpos += stack->stacknew;
stack->stacknew = 0;
/* We finished the recursion, so let's reinitalize the stack position to
* beginning */
if ((--stack->wndprocrecursion) == 0) {
stack->stackpos = 0;
}
/* If we removed the last entry in our stack while a window procedure was