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[REGEDIT] Correctly limit splitter's X coordinates (#6758)

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JIRA issue: CORE-19516
- Add ClampSplitBarX helper function to delete
  duplicated code.
- Use a signed value in WM_LBUTTONUP handling.
- Use ClampSplitBarX in ResizeWnd function,
  WM_LBUTTONDOWN, WM_MOUSEMOVE, and
  WM_LBUTTONUP handling.
This commit is contained in:
Katayama Hirofumi MZ 2024-04-18 06:09:58 +09:00 committed by GitHub
parent 7b4f42470f
commit d383b20b01
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GPG key ID: B5690EEEBB952194
1 changed files with 30 additions and 39 deletions
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69
base/applications/regedit/childwnd.c
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@ -2,6 +2,7 @@
* Regedit child window
*
* Copyright (C) 2002 Robert Dickenson <robd@reactos.org>
* Copyright (C) 2024 Katayama Hirofumi MZ <katayama.hirofumi.mz@gmail.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
@ -38,6 +39,13 @@ extern LPCWSTR get_root_key_name(HKEY hRootKey)
return L"UNKNOWN HKEY, PLEASE REPORT";
}
static INT ClampSplitBarX(HWND hWnd, INT x)
{
RECT rc;
GetClientRect(hWnd, &rc);
return min(max(x, SPLIT_MIN), rc.right - SPLIT_MIN);
}
extern void ResizeWnd(int cx, int cy)
{
HDWP hdwp = BeginDeferWindowPos(4);
@ -54,6 +62,9 @@ extern void ResizeWnd(int cx, int cy)
cy = rs.bottom - rs.top;
}
GetWindowRect(g_pChildWnd->hAddressBtnWnd, &rb);
g_pChildWnd->nSplitPos = ClampSplitBarX(g_pChildWnd->hWnd, g_pChildWnd->nSplitPos);
cx = g_pChildWnd->nSplitPos + SPLIT_WIDTH / 2;
if (hdwp)
hdwp = DeferWindowPos(hdwp, g_pChildWnd->hAddressBarWnd, NULL,
@ -380,6 +391,7 @@ LRESULT CALLBACK ChildWndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lPa
}
}
goto def;
case WM_DESTROY:
DestroyListView(g_pChildWnd->hListWnd);
DestroyTreeView(g_pChildWnd->hTreeWnd);
@ -389,15 +401,16 @@ LRESULT CALLBACK ChildWndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lPa
g_pChildWnd = NULL;
PostQuitMessage(0);
break;
case WM_LBUTTONDOWN:
{
RECT rt;
int x = (short)LOWORD(lParam);
GetClientRect(hWnd, &rt);
if (x>=g_pChildWnd->nSplitPos-SPLIT_WIDTH/2 && x<g_pChildWnd->nSplitPos+SPLIT_WIDTH/2+1)
INT x = (SHORT)LOWORD(lParam);
if (x >= g_pChildWnd->nSplitPos - SPLIT_WIDTH / 2 &&
x < g_pChildWnd->nSplitPos + SPLIT_WIDTH / 2 + 1)
{
last_split = g_pChildWnd->nSplitPos;
draw_splitbar(hWnd, last_split);
x = ClampSplitBarX(hWnd, x);
draw_splitbar(hWnd, x);
last_split = x;
SetCapture(hWnd);
}
break;
@ -407,12 +420,14 @@ LRESULT CALLBACK ChildWndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lPa
case WM_RBUTTONDOWN:
if (GetCapture() == hWnd)
{
finish_splitbar(hWnd, LOWORD(lParam));
INT x = (SHORT)LOWORD(lParam);
x = ClampSplitBarX(hWnd, x);
finish_splitbar(hWnd, x);
}
break;
case WM_CAPTURECHANGED:
if (GetCapture()==hWnd && last_split>=0)
if (GetCapture() == hWnd && last_split >= 0)
draw_splitbar(hWnd, last_split);
break;
@ -433,35 +448,13 @@ LRESULT CALLBACK ChildWndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lPa
case WM_MOUSEMOVE:
if (GetCapture() == hWnd)
{
HDC hdc;
RECT rt;
HGDIOBJ OldObj;
int x = LOWORD(lParam);
if(!SizingPattern)
INT x = (SHORT)LOWORD(lParam);
x = ClampSplitBarX(hWnd, x);
if (last_split != x)
{
const DWORD Pattern[4] = {0x5555AAAA, 0x5555AAAA, 0x5555AAAA, 0x5555AAAA};
SizingPattern = CreateBitmap(8, 8, 1, 1, Pattern);
}
if(!SizingBrush)
{
SizingBrush = CreatePatternBrush(SizingPattern);
}
GetClientRect(hWnd, &rt);
x = (SHORT) min(max(x, SPLIT_MIN), rt.right - SPLIT_MIN);
if(last_split != x)
{
rt.left = last_split-SPLIT_WIDTH/2;
rt.right = last_split+SPLIT_WIDTH/2+1;
hdc = GetDC(hWnd);
OldObj = SelectObject(hdc, SizingBrush);
PatBlt(hdc, rt.left, rt.top, rt.right - rt.left, rt.bottom - rt.top, PATINVERT);
draw_splitbar(hWnd, last_split);
last_split = x;
rt.left = x-SPLIT_WIDTH/2;
rt.right = x+SPLIT_WIDTH/2+1;
PatBlt(hdc, rt.left, rt.top, rt.right - rt.left, rt.bottom - rt.top, PATINVERT);
SelectObject(hdc, OldObj);
ReleaseDC(hWnd, hdc);
draw_splitbar(hWnd, last_split);
}
}
break;
@ -473,9 +466,6 @@ LRESULT CALLBACK ChildWndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lPa
}
break;
case WM_TIMER:
break;
case WM_NOTIFY:
if (g_pChildWnd == NULL) break;
@ -668,7 +658,8 @@ LRESULT CALLBACK ChildWndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lPa
{
ResizeWnd(LOWORD(lParam), HIWORD(lParam));
}
/* fall through */
break;
default:
def:
return DefWindowProcW(hWnd, message, wParam, lParam);