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2ea03b5b22
Fixing typos in code comments enhances code readability and comprehension for developers and collaborators.
614 lines
14 KiB
C
614 lines
14 KiB
C
/*
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* PROJECT: ReactOS user32.dll
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* LICENSE: GPL-2.0-or-later (https://spdx.org/licenses/GPL-2.0-or-later)
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* PURPOSE: Ghost window class
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* COPYRIGHT: Copyright 2018 Katayama Hirofumi MZ (katayama.hirofumi.mz@gmail.com)
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*/
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#include <user32.h>
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#include <strsafe.h>
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#include "ghostwnd.h"
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WINE_DEFAULT_DEBUG_CHANNEL(ghost);
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#define GHOST_TIMER_ID 0xFACEDEAD
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#define GHOST_INTERVAL 1000 // one second
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const struct builtin_class_descr GHOST_builtin_class =
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{
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L"Ghost", /* name */
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0, /* style */
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GhostWndProcA, /* procA */
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GhostWndProcW, /* procW */
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0, /* extra */
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IDC_WAIT, /* cursor */
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NULL /* brush */
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};
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static HBITMAP
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IntCreate32BppBitmap(INT cx, INT cy)
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{
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HBITMAP hbm = NULL;
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BITMAPINFO bi;
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HDC hdc;
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LPVOID pvBits;
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ZeroMemory(&bi, sizeof(bi));
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bi.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
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bi.bmiHeader.biWidth = cx;
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bi.bmiHeader.biHeight = cy;
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bi.bmiHeader.biPlanes = 1;
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bi.bmiHeader.biBitCount = 32;
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hdc = CreateCompatibleDC(NULL);
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if (hdc)
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{
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hbm = CreateDIBSection(hdc, &bi, DIB_RGB_COLORS, &pvBits, NULL, 0);
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DeleteDC(hdc);
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}
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return hbm;
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}
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static HBITMAP
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IntGetWindowBitmap(HWND hwnd, INT cx, INT cy)
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{
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HBITMAP hbm = NULL;
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HDC hdc, hdcMem;
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HGDIOBJ hbmOld;
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hdc = GetWindowDC(hwnd);
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if (!hdc)
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return NULL;
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hdcMem = CreateCompatibleDC(hdc);
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if (!hdcMem)
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goto earth;
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hbm = IntCreate32BppBitmap(cx, cy);
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if (hbm)
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{
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hbmOld = SelectObject(hdcMem, hbm);
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BitBlt(hdcMem, 0, 0, cx, cy, hdc, 0, 0, SRCCOPY | CAPTUREBLT);
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SelectObject(hdcMem, hbmOld);
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}
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DeleteDC(hdcMem);
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earth:
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ReleaseDC(hwnd, hdc);
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return hbm;
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}
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static VOID
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IntMakeGhostImage(HBITMAP hbm)
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{
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BITMAP bm;
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DWORD i, *pdw;
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GetObject(hbm, sizeof(bm), &bm);
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if (bm.bmBitsPixel != 32 || !bm.bmBits)
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{
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ERR("bm.bmBitsPixel == %d, bm.bmBits == %p\n",
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bm.bmBitsPixel, bm.bmBits);
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return;
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}
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pdw = bm.bmBits;
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for (i = 0; i < bm.bmWidth * bm.bmHeight; ++i)
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{
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*pdw = *pdw | 0x00C0C0C0; // bitwise-OR with ARGB #C0C0C0
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++pdw;
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}
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}
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/****************************************************************************/
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static GHOST_DATA *
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Ghost_GetData(HWND hwnd)
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{
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return (GHOST_DATA *)GetWindowLongPtrW(hwnd, GWLP_USERDATA);
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}
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static HWND
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Ghost_GetTarget(HWND hwnd)
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{
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GHOST_DATA *pData = Ghost_GetData(hwnd);
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if (!pData)
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return NULL;
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return pData->hwndTarget;
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}
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static LPWSTR
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Ghost_GetText(HWND hwndTarget, INT *pcchTextW, INT cchExtra)
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{
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LPWSTR pszTextW = NULL, pszTextNewW;
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INT cchNonExtra, cchTextW = *pcchTextW;
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pszTextNewW = HeapAlloc(GetProcessHeap(), 0, cchTextW * sizeof(WCHAR));
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for (;;)
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{
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if (!pszTextNewW)
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{
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ERR("HeapAlloc failed\n");
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if (pszTextW)
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HeapFree(GetProcessHeap(), 0, pszTextW);
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return NULL;
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}
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pszTextW = pszTextNewW;
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cchNonExtra = cchTextW - cchExtra;
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if (InternalGetWindowText(hwndTarget, pszTextW,
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cchNonExtra) < cchNonExtra - 1)
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{
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break;
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}
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cchTextW *= 2;
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pszTextNewW = HeapReAlloc(GetProcessHeap(), 0, pszTextW,
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cchTextW * sizeof(WCHAR));
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}
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*pcchTextW = cchTextW;
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return pszTextW;
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}
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static BOOL
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Ghost_OnCreate(HWND hwnd, CREATESTRUCTW *lpcs)
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{
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HBITMAP hbm32bpp;
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HWND hwndTarget, hwndPrev;
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GHOST_DATA *pData;
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RECT rc;
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DWORD style, exstyle;
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WCHAR szTextW[320], szNotRespondingW[32];
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LPWSTR pszTextW;
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INT cchTextW, cchExtraW, cchNonExtraW;
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PWND pWnd = ValidateHwnd(hwnd);
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if (pWnd)
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{
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if (!pWnd->fnid)
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{
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NtUserSetWindowFNID(hwnd, FNID_GHOST);
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}
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else if (pWnd->fnid != FNID_GHOST)
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{
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ERR("Wrong window class for Ghost! fnId 0x%x\n", pWnd->fnid);
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return FALSE;
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}
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}
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// get the target
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hwndTarget = (HWND)lpcs->lpCreateParams;
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if (!IsWindowVisible(hwndTarget) || // invisible?
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(GetWindowLongPtrW(hwndTarget, GWL_STYLE) & WS_CHILD) || // child?
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!IsHungAppWindow(hwndTarget)) // not hung?
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{
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return FALSE;
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}
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// check prop
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if (GetPropW(hwndTarget, GHOST_PROP))
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return FALSE;
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// set prop
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SetPropW(hwndTarget, GHOST_PROP, hwnd);
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// create user data
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pData = HeapAlloc(GetProcessHeap(), 0, sizeof(GHOST_DATA));
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if (!pData)
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{
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ERR("HeapAlloc failed\n");
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return FALSE;
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}
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// get window image
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GetWindowRect(hwndTarget, &rc);
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hbm32bpp = IntGetWindowBitmap(hwndTarget,
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rc.right - rc.left,
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rc.bottom - rc.top);
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if (!hbm32bpp)
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{
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ERR("hbm32bpp was NULL\n");
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HeapFree(GetProcessHeap(), 0, pData);
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return FALSE;
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}
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// make a ghost image
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IntMakeGhostImage(hbm32bpp);
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// set user data
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pData->hwndTarget = hwndTarget;
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pData->hbm32bpp = hbm32bpp;
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pData->bDestroyTarget = FALSE;
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SetWindowLongPtrW(hwnd, GWLP_USERDATA, (LONG_PTR)pData);
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// get style
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style = GetWindowLongPtrW(hwndTarget, GWL_STYLE);
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exstyle = GetWindowLongPtrW(hwndTarget, GWL_EXSTYLE);
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// get text
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cchTextW = ARRAYSIZE(szTextW);
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cchExtraW = ARRAYSIZE(szNotRespondingW);
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cchNonExtraW = cchTextW - cchExtraW;
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if (InternalGetWindowText(hwndTarget, szTextW,
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cchNonExtraW) < cchNonExtraW - 1)
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{
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pszTextW = szTextW;
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}
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else
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{
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cchTextW *= 2;
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pszTextW = Ghost_GetText(hwndTarget, &cchTextW, cchExtraW);
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if (!pszTextW)
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{
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ERR("Ghost_GetText failed\n");
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DeleteObject(hbm32bpp);
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HeapFree(GetProcessHeap(), 0, pData);
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return FALSE;
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}
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}
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// don't use scrollbars.
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style &= ~(WS_HSCROLL | WS_VSCROLL | WS_VISIBLE);
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// set style
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SetWindowLongPtrW(hwnd, GWL_STYLE, style);
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SetWindowLongPtrW(hwnd, GWL_EXSTYLE, exstyle);
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// set text with " (Not Responding)"
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LoadStringW(User32Instance, IDS_NOT_RESPONDING,
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szNotRespondingW, ARRAYSIZE(szNotRespondingW));
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StringCchCatW(pszTextW, cchTextW, szNotRespondingW);
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SetWindowTextW(hwnd, pszTextW);
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// free the text buffer
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if (szTextW != pszTextW)
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HeapFree(GetProcessHeap(), 0, pszTextW);
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// get previous window of target
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hwndPrev = GetWindow(hwndTarget, GW_HWNDPREV);
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// hide target
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ShowWindowAsync(hwndTarget, SW_HIDE);
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// shrink the ghost to zero size and insert.
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// this will avoid effects.
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SetWindowPos(hwnd, hwndPrev, 0, 0, 0, 0,
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SWP_NOMOVE | SWP_NOACTIVATE | SWP_NOOWNERZORDER |
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SWP_DRAWFRAME);
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// resume the position and size of ghost
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MoveWindow(hwnd, rc.left, rc.top,
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rc.right - rc.left, rc.bottom - rc.top, TRUE);
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// make ghost visible
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SetWindowLongPtrW(hwnd, GWL_STYLE, style | WS_VISIBLE);
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// redraw
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InvalidateRect(hwnd, NULL, TRUE);
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// start timer
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SetTimer(hwnd, GHOST_TIMER_ID, GHOST_INTERVAL, NULL);
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return TRUE;
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}
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static void
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Ghost_Unenchant(HWND hwnd, BOOL bDestroyTarget)
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{
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GHOST_DATA *pData = Ghost_GetData(hwnd);
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if (!pData)
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return;
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pData->bDestroyTarget |= bDestroyTarget;
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DestroyWindow(hwnd);
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}
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static void
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Ghost_OnDraw(HWND hwnd, HDC hdc)
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{
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BITMAP bm;
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HDC hdcMem;
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GHOST_DATA *pData = Ghost_GetData(hwnd);
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if (!pData || !GetObject(pData->hbm32bpp, sizeof(bm), &bm))
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return;
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hdcMem = CreateCompatibleDC(hdc);
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if (hdcMem)
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{
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HGDIOBJ hbmOld = SelectObject(hdcMem, pData->hbm32bpp);
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BitBlt(hdc, 0, 0, bm.bmWidth, bm.bmHeight,
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hdcMem, 0, 0, SRCCOPY | CAPTUREBLT);
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SelectObject(hdcMem, hbmOld);
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DeleteDC(hdcMem);
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}
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}
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static void
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Ghost_OnNCPaint(HWND hwnd, HRGN hrgn, BOOL bUnicode)
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{
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HDC hdc;
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// do the default behaviour
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if (bUnicode)
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DefWindowProcW(hwnd, WM_NCPAINT, (WPARAM)hrgn, 0);
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else
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DefWindowProcA(hwnd, WM_NCPAINT, (WPARAM)hrgn, 0);
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// draw the ghost image
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hdc = GetWindowDC(hwnd);
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if (hdc)
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{
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Ghost_OnDraw(hwnd, hdc);
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ReleaseDC(hwnd, hdc);
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}
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}
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static void
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Ghost_OnPaint(HWND hwnd)
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{
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PAINTSTRUCT ps;
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HDC hdc = BeginPaint(hwnd, &ps);
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if (hdc)
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{
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// don't draw at here
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EndPaint(hwnd, &ps);
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}
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}
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static void
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Ghost_OnMove(HWND hwnd, int x, int y)
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{
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RECT rc;
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HWND hwndTarget = Ghost_GetTarget(hwnd);
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GetWindowRect(hwnd, &rc);
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// move the target
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SetWindowPos(hwndTarget, NULL, rc.left, rc.top, 0, 0,
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SWP_NOSIZE | SWP_NOOWNERZORDER | SWP_NOACTIVATE |
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SWP_NOSENDCHANGING);
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}
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static void
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Ghost_OnDestroy(HWND hwnd)
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{
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KillTimer(hwnd, GHOST_TIMER_ID);
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}
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static void
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Ghost_DestroyTarget(GHOST_DATA *pData)
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{
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HWND hwndTarget = pData->hwndTarget;
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DWORD pid;
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HANDLE hProcess;
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pData->hwndTarget = NULL;
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GetWindowThreadProcessId(hwndTarget, &pid);
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hProcess = OpenProcess(PROCESS_TERMINATE, FALSE, pid);
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if (hProcess)
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{
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TerminateProcess(hProcess, -1);
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CloseHandle(hProcess);
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}
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DestroyWindow(hwndTarget);
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}
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static void
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Ghost_OnNCDestroy(HWND hwnd)
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{
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// delete the user data
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GHOST_DATA *pData = Ghost_GetData(hwnd);
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if (pData)
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{
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SetWindowLongPtrW(hwnd, GWLP_USERDATA, 0);
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// delete image
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DeleteObject(pData->hbm32bpp);
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pData->hbm32bpp = NULL;
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// remove prop
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RemovePropW(pData->hwndTarget, GHOST_PROP);
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// show target
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ShowWindowAsync(pData->hwndTarget, SW_SHOWNOACTIVATE);
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// destroy target if necessary
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if (pData->bDestroyTarget)
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{
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Ghost_DestroyTarget(pData);
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}
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HeapFree(GetProcessHeap(), 0, pData);
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}
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NtUserSetWindowFNID(hwnd, FNID_DESTROY);
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PostQuitMessage(0);
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}
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static void
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Ghost_OnClose(HWND hwnd)
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{
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INT id;
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WCHAR szAskTerminate[128];
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WCHAR szHungUpTitle[128];
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// stop timer
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KillTimer(hwnd, GHOST_TIMER_ID);
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LoadStringW(User32Instance, IDS_ASK_TERMINATE,
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szAskTerminate, ARRAYSIZE(szAskTerminate));
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LoadStringW(User32Instance, IDS_HUNG_UP_TITLE,
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szHungUpTitle, ARRAYSIZE(szHungUpTitle));
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id = MessageBoxW(hwnd, szAskTerminate, szHungUpTitle,
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MB_ICONINFORMATION | MB_YESNO);
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if (id == IDYES)
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{
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// destroy the target
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Ghost_Unenchant(hwnd, TRUE);
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return;
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}
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// restart timer
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SetTimer(hwnd, GHOST_TIMER_ID, GHOST_INTERVAL, NULL);
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}
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static void
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Ghost_OnTimer(HWND hwnd, UINT id)
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{
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HWND hwndTarget;
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GHOST_DATA *pData = Ghost_GetData(hwnd);
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if (id != GHOST_TIMER_ID || !pData)
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return;
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// stop the timer
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KillTimer(hwnd, id);
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hwndTarget = pData->hwndTarget;
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if (!IsWindow(hwndTarget) || !IsHungAppWindow(hwndTarget))
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{
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// resume if window is destroyed or responding
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Ghost_Unenchant(hwnd, FALSE);
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return;
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}
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// restart the timer
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SetTimer(hwnd, GHOST_TIMER_ID, GHOST_INTERVAL, NULL);
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}
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static HICON
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Ghost_GetIcon(HWND hwnd, INT fType)
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{
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GHOST_DATA *pData = Ghost_GetData(hwnd);
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HICON hIcon = NULL;
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if (!pData)
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return NULL;
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// same as the original icon
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switch (fType)
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{
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case ICON_BIG:
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{
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hIcon = (HICON)GetClassLongPtrW(pData->hwndTarget, GCLP_HICON);
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break;
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}
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case ICON_SMALL:
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{
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hIcon = (HICON)GetClassLongPtrW(pData->hwndTarget, GCLP_HICONSM);
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break;
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}
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}
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return hIcon;
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}
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LRESULT WINAPI
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GhostWndProc_common(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam,
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BOOL unicode)
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{
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switch (uMsg)
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{
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case WM_CREATE:
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if (!Ghost_OnCreate(hwnd, (CREATESTRUCTW *)lParam))
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return -1;
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break;
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case WM_NCPAINT:
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Ghost_OnNCPaint(hwnd, (HRGN)wParam, unicode);
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return 0;
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case WM_ERASEBKGND:
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Ghost_OnDraw(hwnd, (HDC)wParam);
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return TRUE;
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case WM_PAINT:
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Ghost_OnPaint(hwnd);
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break;
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case WM_MOVE:
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Ghost_OnMove(hwnd, (SHORT)LOWORD(lParam), (SHORT)HIWORD(lParam));
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break;
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case WM_SIZE:
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break;
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case WM_SIZING:
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return TRUE;
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case WM_SYSCOMMAND:
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switch ((UINT)wParam)
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|
{
|
|
case SC_MAXIMIZE:
|
|
case SC_SIZE:
|
|
// sizing-related
|
|
return 0;
|
|
}
|
|
if (unicode)
|
|
return DefWindowProcW(hwnd, uMsg, wParam, lParam);
|
|
else
|
|
return DefWindowProcA(hwnd, uMsg, wParam, lParam);
|
|
|
|
case WM_CLOSE:
|
|
Ghost_OnClose(hwnd);
|
|
break;
|
|
|
|
case WM_TIMER:
|
|
Ghost_OnTimer(hwnd, (UINT)wParam);
|
|
break;
|
|
|
|
case WM_NCMOUSEMOVE:
|
|
if (unicode)
|
|
DefWindowProcW(hwnd, uMsg, wParam, lParam);
|
|
else
|
|
DefWindowProcA(hwnd, uMsg, wParam, lParam);
|
|
SetCursor(LoadCursor(NULL, IDC_WAIT));
|
|
return 0;
|
|
|
|
case WM_GETICON:
|
|
return (LRESULT)Ghost_GetIcon(hwnd, (INT)wParam);
|
|
|
|
case WM_COMMAND:
|
|
if (LOWORD(wParam) == 3333)
|
|
Ghost_Unenchant(hwnd, FALSE);
|
|
break;
|
|
|
|
case WM_DESTROY:
|
|
Ghost_OnDestroy(hwnd);
|
|
break;
|
|
|
|
case WM_NCDESTROY:
|
|
Ghost_OnNCDestroy(hwnd);
|
|
break;
|
|
|
|
default:
|
|
{
|
|
if (unicode)
|
|
return DefWindowProcW(hwnd, uMsg, wParam, lParam);
|
|
else
|
|
return DefWindowProcA(hwnd, uMsg, wParam, lParam);
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
LRESULT CALLBACK
|
|
GhostWndProcA(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
|
|
{
|
|
return GhostWndProc_common(hwnd, uMsg, wParam, lParam, FALSE);
|
|
}
|
|
|
|
LRESULT CALLBACK
|
|
GhostWndProcW(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
|
|
{
|
|
return GhostWndProc_common(hwnd, uMsg, wParam, lParam, TRUE);
|
|
}
|