reactos/base/applications/regedit/hexedit.c
Timo Kreuzer 9ea495ba33 Create a branch for header work.
svn path=/branches/header-work/; revision=45691
2010-02-26 22:57:55 +00:00

955 lines
20 KiB
C

/*
* Hex editor control
*
* Copyright (C) 2004 Thomas Weidenmueller <w3seek@reactos.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <regedit.h>
typedef struct
{
HWND hWndSelf;
HWND hWndParent;
HLOCAL hBuffer;
DWORD style;
DWORD MaxBuffer;
INT ColumnsPerLine;
INT nLines;
INT nVisibleLinesComplete;
INT nVisibleLines;
INT Position;
INT LineHeight;
INT CharWidth;
HFONT hFont;
BOOL SbVisible;
INT LeftMargin;
INT AddressSpacing;
INT SplitSpacing;
BOOL EditingField;
INT CaretCol;
INT CaretLine;
} HEXEDIT_DATA, *PHEXEDIT_DATA;
/* hit test codes */
#define HEHT_LEFTMARGIN (0x1)
#define HEHT_ADDRESS (0x2)
#define HEHT_ADDRESSSPACING (0x3)
#define HEHT_HEXDUMP (0x4)
#define HEHT_HEXDUMPSPACING (0x5)
#define HEHT_ASCIIDUMP (0x6)
#define HEHT_RIGHTMARGIN (0x7)
INT_PTR CALLBACK HexEditWndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam);
ATOM
WINAPI
RegisterHexEditorClass(HINSTANCE hInstance)
{
WNDCLASSEX WndClass;
ZeroMemory(&WndClass, sizeof(WNDCLASSEX));
WndClass.cbSize = sizeof(WNDCLASSEX);
WndClass.style = CS_DBLCLKS;
WndClass.lpfnWndProc = (WNDPROC)HexEditWndProc;
WndClass.cbWndExtra = sizeof(PHEXEDIT_DATA);
WndClass.hInstance = hInstance;
WndClass.hCursor = LoadCursor(0, IDC_IBEAM);
WndClass.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1);
WndClass.lpszClassName = HEX_EDIT_CLASS_NAME;
return RegisterClassEx(&WndClass);
}
BOOL
WINAPI
UnregisterHexEditorClass(HINSTANCE hInstance)
{
return UnregisterClass(HEX_EDIT_CLASS_NAME, hInstance);
}
/*** Helper functions *********************************************************/
static VOID
HEXEDIT_MoveCaret(PHEXEDIT_DATA hed, BOOL Scroll)
{
SCROLLINFO si;
si.cbSize = sizeof(SCROLLINFO);
si.fMask = SIF_POS;
GetScrollInfo(hed->hWndSelf, SB_VERT, &si);
if(Scroll)
{
if(si.nPos > hed->CaretLine)
{
si.nPos = hed->CaretLine;
SetScrollInfo(hed->hWndSelf, SB_VERT, &si, TRUE);
GetScrollInfo(hed->hWndSelf, SB_VERT, &si);
InvalidateRect(hed->hWndSelf, NULL, TRUE);
}
else if(hed->CaretLine >= (hed->nVisibleLinesComplete + si.nPos))
{
si.nPos = hed->CaretLine - hed->nVisibleLinesComplete + 1;
SetScrollInfo(hed->hWndSelf, SB_VERT, &si, TRUE);
GetScrollInfo(hed->hWndSelf, SB_VERT, &si);
InvalidateRect(hed->hWndSelf, NULL, TRUE);
}
}
if(hed->EditingField)
SetCaretPos(hed->LeftMargin + ((4 + hed->AddressSpacing + (3 * hed->CaretCol)) * hed->CharWidth) - 1, (hed->CaretLine - si.nPos) * hed->LineHeight);
else
SetCaretPos(hed->LeftMargin + ((4 + hed->AddressSpacing + hed->SplitSpacing + (3 * hed->ColumnsPerLine) + hed->CaretCol) * hed->CharWidth) - 2, (hed->CaretLine - si.nPos) * hed->LineHeight);
}
static VOID
HEXEDIT_Update(PHEXEDIT_DATA hed)
{
SCROLLINFO si;
RECT rcClient;
BOOL SbVisible;
INT bufsize, cvislines;
GetClientRect(hed->hWndSelf, &rcClient);
hed->style = GetWindowLongPtr(hed->hWndSelf, GWL_STYLE);
bufsize = (hed->hBuffer ? (INT) LocalSize(hed->hBuffer) : 0);
hed->nLines = max(bufsize / hed->ColumnsPerLine, 1);
if(bufsize > hed->ColumnsPerLine && (bufsize % hed->ColumnsPerLine) > 0)
{
hed->nLines++;
}
if(hed->LineHeight > 0)
{
hed->nVisibleLinesComplete = cvislines = rcClient.bottom / hed->LineHeight;
hed->nVisibleLines = hed->nVisibleLinesComplete;
if(rcClient.bottom % hed->LineHeight)
{
hed->nVisibleLines++;
}
}
else
{
hed->nVisibleLines = cvislines = 0;
}
SbVisible = bufsize > 0 && cvislines < hed->nLines;
ShowScrollBar(hed->hWndSelf, SB_VERT, SbVisible);
/* update scrollbar */
si.cbSize = sizeof(SCROLLINFO);
si.fMask = SIF_RANGE | SIF_PAGE;
si.nMin = 0;
si.nMax = ((bufsize > 0) ? hed->nLines - 1 : 0);
si.nPage = ((hed->LineHeight > 0) ? rcClient.bottom / hed->LineHeight : 0);
SetScrollInfo(hed->hWndSelf, SB_VERT, &si, TRUE);
if(IsWindowVisible(hed->hWndSelf) && SbVisible != hed->SbVisible)
{
InvalidateRect(hed->hWndSelf, NULL, TRUE);
}
hed->SbVisible = SbVisible;
}
static HFONT
HEXEDIT_GetFixedFont(VOID)
{
LOGFONT lf;
GetObject(GetStockObject(ANSI_FIXED_FONT), sizeof(LOGFONT), &lf);
return CreateFontIndirect(&lf);
}
static VOID
HEXEDIT_PaintLines(PHEXEDIT_DATA hed, HDC hDC, DWORD ScrollPos, DWORD First, DWORD Last, RECT *rc)
{
DWORD dx, dy, linestart;
INT x;
PBYTE buf, current, end, line;
size_t bufsize;
TCHAR hex[3], addr[17];
RECT rct;
FillRect(hDC, rc, (HBRUSH)(COLOR_WINDOW + 1));
if(hed->hBuffer)
{
bufsize = LocalSize(hed->hBuffer);
buf = LocalLock(hed->hBuffer);
}
else
{
buf = NULL;
bufsize = 0;
if(ScrollPos + First == 0)
{
/* draw address */
_stprintf(addr, _T("%04X"), 0);
TextOut(hDC, hed->LeftMargin, First * hed->LineHeight, addr, 4);
}
}
if(buf)
{
end = buf + bufsize;
dy = First * hed->LineHeight;
linestart = (ScrollPos + First) * hed->ColumnsPerLine;
current = buf + linestart;
Last = min(hed->nLines - ScrollPos, Last);
while(First <= Last && current < end)
{
DWORD dh;
dx = hed->LeftMargin;
/* draw address */
_stprintf(addr, _T("%04lX"), linestart);
TextOut(hDC, dx, dy, addr, 4);
dx += ((4 + hed->AddressSpacing) * hed->CharWidth);
dh = (3 * hed->CharWidth);
rct.left = dx;
rct.top = dy;
rct.right = rct.left + dh;
rct.bottom = dy + hed->LineHeight;
/* draw hex map */
dx += (hed->CharWidth / 2);
line = current;
for(x = 0; x < hed->ColumnsPerLine && current < end; x++)
{
rct.left += dh;
rct.right += dh;
_stprintf(hex, _T("%02X"), *(current++));
ExtTextOut(hDC, dx, dy, ETO_OPAQUE, &rct, hex, 2, NULL);
dx += dh;
}
/* draw ascii map */
dx = ((4 + hed->AddressSpacing + hed->SplitSpacing + (hed->ColumnsPerLine * 3)) * hed->CharWidth);
current = line;
for(x = 0; x < hed->ColumnsPerLine && current < end; x++)
{
_stprintf(hex, _T("%C"), *(current++));
hex[0] = ((hex[0] & _T('\x007f')) >= _T(' ') ? hex[0] : _T('.'));
TextOut(hDC, dx, dy, hex, 1);
dx += hed->CharWidth;
}
dy += hed->LineHeight;
linestart += hed->ColumnsPerLine;
First++;
}
}
LocalUnlock(hed->hBuffer);
}
static DWORD
HEXEDIT_HitRegionTest(PHEXEDIT_DATA hed, POINTS pt)
{
int d;
if(pt.x <= hed->LeftMargin)
{
return HEHT_LEFTMARGIN;
}
pt.x -= hed->LeftMargin;
d = (4 * hed->CharWidth);
if(pt.x <= d)
{
return HEHT_ADDRESS;
}
pt.x -= d;
d = (hed->AddressSpacing * hed->CharWidth);
if(pt.x <= d)
{
return HEHT_ADDRESSSPACING;
}
pt.x -= d;
d = (3 * hed->ColumnsPerLine * hed->CharWidth);
if(pt.x <= d)
{
return HEHT_HEXDUMP;
}
pt.x -= d;
d = (hed->SplitSpacing * hed->CharWidth);
if(pt.x <= d)
{
return HEHT_HEXDUMPSPACING;
}
pt.x -= d;
d = (hed->ColumnsPerLine * hed->CharWidth);
if(pt.x <= d)
{
return HEHT_ASCIIDUMP;
}
return HEHT_RIGHTMARGIN;
}
static DWORD
HEXEDIT_PositionFromPoint(PHEXEDIT_DATA hed, POINTS pt, DWORD Hit, POINT *EditPos, BOOL *EditField)
{
SCROLLINFO si;
DWORD Pos, bufsize;
si.cbSize = sizeof(SCROLLINFO);
si.fMask = SIF_POS;
GetScrollInfo(hed->hWndSelf, SB_VERT, &si);
EditPos->x = 0;
if(hed->LineHeight > 0)
{
EditPos->y = min(si.nPos + (pt.y / hed->LineHeight), hed->nLines - 1);
}
else
{
EditPos->y = si.nPos;
}
switch(Hit)
{
case HEHT_LEFTMARGIN:
case HEHT_ADDRESS:
case HEHT_ADDRESSSPACING:
case HEHT_HEXDUMP:
pt.x -= (SHORT) hed->LeftMargin + ((4 + hed->AddressSpacing) * hed->CharWidth);
*EditField = TRUE;
break;
default:
pt.x -= hed->LeftMargin + ((4 + hed->AddressSpacing + hed->SplitSpacing + (3 * hed->ColumnsPerLine)) * hed->CharWidth);
*EditField = FALSE;
break;
}
if(pt.x > 0)
{
INT BlockWidth = (*EditField ? hed->CharWidth * 3 : hed->CharWidth);
EditPos->x = min(hed->ColumnsPerLine, pt.x / BlockWidth);
}
bufsize = (hed->hBuffer ? (DWORD) LocalSize(hed->hBuffer) : 0);
Pos = (EditPos->y * hed->ColumnsPerLine) + EditPos->x;
if(Pos > bufsize)
{
INT tmp = bufsize % hed->ColumnsPerLine;
Pos = bufsize;
EditPos->x = (tmp == 0 ? hed->ColumnsPerLine : tmp);
}
return Pos;
}
/*** Control specific messages ************************************************/
static LRESULT
HEXEDIT_HEM_LOADBUFFER(PHEXEDIT_DATA hed, PVOID Buffer, DWORD Size)
{
if(Buffer != NULL && Size > 0)
{
LPVOID buf;
if(hed->MaxBuffer > 0 && Size > hed->MaxBuffer)
{
Size = hed->MaxBuffer;
}
if(hed->hBuffer)
{
if(Size > 0)
{
if(LocalSize(hed->hBuffer) != Size)
{
hed->hBuffer = LocalReAlloc(hed->hBuffer, Size, LMEM_MOVEABLE | LMEM_ZEROINIT);
}
}
else
{
hed->hBuffer = LocalFree(hed->hBuffer);
hed->Position = 0;
HEXEDIT_Update(hed);
return 0;
}
}
else if(Size > 0)
{
hed->hBuffer = LocalAlloc(LHND, Size);
}
if(Size > 0)
{
buf = LocalLock(hed->hBuffer);
if(buf)
{
memcpy(buf, Buffer, Size);
}
else
Size = 0;
LocalUnlock(hed->hBuffer);
}
hed->Position = 0;
HEXEDIT_Update(hed);
return Size;
}
else if(hed->hBuffer)
{
hed->Position = 0;
hed->hBuffer = LocalFree(hed->hBuffer);
HEXEDIT_Update(hed);
}
return 0;
}
static LRESULT
HEXEDIT_HEM_COPYBUFFER(PHEXEDIT_DATA hed, PVOID Buffer, DWORD Size)
{
size_t nCpy;
if(!hed->hBuffer)
{
return 0;
}
if(Buffer != NULL && Size > 0)
{
nCpy = min(Size, LocalSize(hed->hBuffer));
if(nCpy > 0)
{
PVOID buf;
buf = LocalLock(hed->hBuffer);
if(buf)
{
memcpy(Buffer, buf, nCpy);
}
else
nCpy = 0;
LocalUnlock(hed->hBuffer);
}
return nCpy;
}
return (LRESULT)LocalSize(hed->hBuffer);
}
static LRESULT
HEXEDIT_HEM_SETMAXBUFFERSIZE(PHEXEDIT_DATA hed, DWORD nMaxSize)
{
hed->MaxBuffer = nMaxSize;
if(hed->MaxBuffer > 0 && hed->hBuffer && LocalSize(hed->hBuffer) > hed->MaxBuffer)
{
/* truncate the buffer */
hed->hBuffer = LocalReAlloc(hed->hBuffer, hed->MaxBuffer, LMEM_MOVEABLE);
HEXEDIT_Update(hed);
}
return 0;
}
/*** Message Proc *************************************************************/
static LRESULT
HEXEDIT_WM_NCCREATE(HWND hWnd, CREATESTRUCT *cs)
{
PHEXEDIT_DATA hed;
if(!(hed = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(HEXEDIT_DATA))))
{
return FALSE;
}
hed->hWndSelf = hWnd;
hed->hWndParent = cs->hwndParent;
hed->style = cs->style;
hed->ColumnsPerLine = 8;
hed->LeftMargin = 2;
hed->AddressSpacing = 2;
hed->SplitSpacing = 2;
hed->EditingField = TRUE; /* in hexdump field */
SetWindowLongPtr(hWnd, 0, (DWORD_PTR)hed);
HEXEDIT_Update(hed);
return TRUE;
}
static LRESULT
HEXEDIT_WM_NCDESTROY(PHEXEDIT_DATA hed)
{
if(hed->hBuffer)
{
//while(LocalUnlock(hed->hBuffer));
LocalFree(hed->hBuffer);
}
if(hed->hFont)
{
DeleteObject(hed->hFont);
}
SetWindowLongPtr(hed->hWndSelf, 0, (DWORD_PTR)0);
HeapFree(GetProcessHeap(), 0, hed);
return 0;
}
static LRESULT
HEXEDIT_WM_CREATE(PHEXEDIT_DATA hed)
{
UNREFERENCED_PARAMETER(hed);
return 1;
}
static LRESULT
HEXEDIT_WM_SETFOCUS(PHEXEDIT_DATA hed)
{
CreateCaret(hed->hWndSelf, 0, 1, hed->LineHeight);
HEXEDIT_MoveCaret(hed, FALSE);
ShowCaret(hed->hWndSelf);
return 0;
}
static LRESULT
HEXEDIT_WM_KILLFOCUS(PHEXEDIT_DATA hed)
{
UNREFERENCED_PARAMETER(hed);
DestroyCaret();
return 0;
}
static LRESULT
HEXEDIT_WM_VSCROLL(PHEXEDIT_DATA hed, WORD ThumbPosition, WORD SbCmd)
{
int ScrollY;
SCROLLINFO si;
UNREFERENCED_PARAMETER(ThumbPosition);
ZeroMemory(&si, sizeof(SCROLLINFO));
si.cbSize = sizeof(SCROLLINFO);
si.fMask = SIF_ALL;
GetScrollInfo(hed->hWndSelf, SB_VERT, &si);
ScrollY = si.nPos;
switch(SbCmd)
{
case SB_TOP:
si.nPos = si.nMin;
break;
case SB_BOTTOM:
si.nPos = si.nMax;
break;
case SB_LINEUP:
si.nPos--;
break;
case SB_LINEDOWN:
si.nPos++;
break;
case SB_PAGEUP:
si.nPos -= si.nPage;
break;
case SB_PAGEDOWN:
si.nPos += si.nPage;
break;
case SB_THUMBTRACK:
si.nPos = si.nTrackPos;
break;
}
si.fMask = SIF_POS;
SetScrollInfo(hed->hWndSelf, SB_VERT, &si, TRUE);
GetScrollInfo(hed->hWndSelf, SB_VERT, &si);
if(si.nPos != ScrollY)
{
ScrollWindow(hed->hWndSelf, 0, (ScrollY - si.nPos) * hed->LineHeight, NULL, NULL);
UpdateWindow(hed->hWndSelf);
}
return 0;
}
static LRESULT
HEXEDIT_WM_SETFONT(PHEXEDIT_DATA hed, HFONT hFont, BOOL bRedraw)
{
HDC hDC;
TEXTMETRIC tm;
HFONT hOldFont = 0;
if(hFont == 0)
{
hFont = HEXEDIT_GetFixedFont();
}
hed->hFont = hFont;
hDC = GetDC(hed->hWndSelf);
if(hFont)
{
hOldFont = SelectObject(hDC, hFont);
}
GetTextMetrics(hDC, &tm);
hed->LineHeight = tm.tmHeight;
hed->CharWidth = tm.tmAveCharWidth;
if(hOldFont)
{
SelectObject(hDC, hOldFont);
}
ReleaseDC(hed->hWndSelf, hDC);
if(bRedraw)
{
InvalidateRect(hed->hWndSelf, NULL, TRUE);
}
return 0;
}
static LRESULT
HEXEDIT_WM_GETFONT(PHEXEDIT_DATA hed)
{
return (LRESULT)hed->hFont;
}
static LRESULT
HEXEDIT_WM_PAINT(PHEXEDIT_DATA hed)
{
PAINTSTRUCT ps;
SCROLLINFO si;
RECT rc;
HBITMAP hbmp, hbmpold;
INT nLines, nFirst;
HFONT hOldFont;
HDC hTempDC;
DWORD height;
if(GetUpdateRect(hed->hWndSelf, &rc, FALSE) && (hed->LineHeight > 0))
{
ZeroMemory(&si, sizeof(SCROLLINFO));
si.cbSize = sizeof(SCROLLINFO);
si.fMask = SIF_POS;
GetScrollInfo(hed->hWndSelf, SB_VERT, &si);
height = (rc.bottom - rc.top);
nLines = height / hed->LineHeight;
if((height % hed->LineHeight) > 0)
{
nLines++;
}
if(nLines > hed->nLines - si.nPos)
{
nLines = hed->nLines - si.nPos;
}
nFirst = rc.top / hed->LineHeight;
BeginPaint(hed->hWndSelf, &ps);
if(!(hTempDC = CreateCompatibleDC(ps.hdc)))
{
FillRect(ps.hdc, &rc, (HBRUSH)(COLOR_WINDOW + 1));
goto epaint;
}
if(!(hbmp = CreateCompatibleBitmap(hTempDC, ps.rcPaint.right, ps.rcPaint.bottom)))
{
FillRect(ps.hdc, &rc, (HBRUSH)(COLOR_WINDOW + 1));
DeleteDC(hTempDC);
goto epaint;
}
hbmpold = SelectObject(hTempDC, hbmp);
hOldFont = SelectObject(hTempDC, hed->hFont);
HEXEDIT_PaintLines(hed, hTempDC, si.nPos, nFirst, nFirst + nLines, &ps.rcPaint);
BitBlt(ps.hdc, rc.left, rc.top, rc.right - rc.left, rc.bottom - rc.top, hTempDC, rc.left, rc.top, SRCCOPY);
SelectObject(hTempDC, hOldFont);
SelectObject(hTempDC, hbmpold);
DeleteObject(hbmp);
DeleteDC(hTempDC);
epaint:
EndPaint(hed->hWndSelf, &ps);
}
return 0;
}
static LRESULT
HEXEDIT_WM_MOUSEWHEEL(PHEXEDIT_DATA hed, int cyMoveLines, WORD ButtonsDown, LPPOINTS MousePos)
{
SCROLLINFO si;
int ScrollY;
UNREFERENCED_PARAMETER(ButtonsDown);
UNREFERENCED_PARAMETER(MousePos);
SetFocus(hed->hWndSelf);
si.cbSize = sizeof(SCROLLINFO);
si.fMask = SIF_ALL;
GetScrollInfo(hed->hWndSelf, SB_VERT, &si);
ScrollY = si.nPos;
si.fMask = SIF_POS;
si.nPos += cyMoveLines;
SetScrollInfo(hed->hWndSelf, SB_VERT, &si, TRUE);
GetScrollInfo(hed->hWndSelf, SB_VERT, &si);
if(si.nPos != ScrollY)
{
ScrollWindow(hed->hWndSelf, 0, (ScrollY - si.nPos) * hed->LineHeight, NULL, NULL);
UpdateWindow(hed->hWndSelf);
}
return 0;
}
static LRESULT
HEXEDIT_WM_GETDLGCODE(LPMSG Msg)
{
UNREFERENCED_PARAMETER(Msg);
return DLGC_WANTARROWS | DLGC_WANTCHARS;
}
static LRESULT
HEXEDIT_WM_LBUTTONDOWN(PHEXEDIT_DATA hed, INT Buttons, POINTS Pt)
{
BOOL NewField;
POINT EditPos;
DWORD Hit = HEXEDIT_HitRegionTest(hed, Pt);
UNREFERENCED_PARAMETER(Buttons);
SetFocus(hed->hWndSelf);
hed->Position = HEXEDIT_PositionFromPoint(hed, Pt, Hit, &EditPos, &NewField);
hed->EditingField = NewField;
hed->CaretCol = EditPos.x;
hed->CaretLine = EditPos.y;
HEXEDIT_MoveCaret(hed, TRUE);
return 0;
}
static BOOL
HEXEDIT_WM_KEYDOWN(PHEXEDIT_DATA hed, INT VkCode)
{
size_t bufsize;
if(GetKeyState(VK_MENU) & 0x8000)
{
return FALSE;
}
bufsize = (hed->hBuffer ? LocalSize(hed->hBuffer) : 0);
switch(VkCode)
{
case VK_LEFT:
if(hed->Position > 0)
{
if(--hed->CaretCol < 0)
{
hed->CaretLine--;
hed->CaretCol = hed->ColumnsPerLine;
}
else
hed->Position--;
}
HEXEDIT_MoveCaret(hed, TRUE);
break;
case VK_RIGHT:
if(hed->Position < (INT)bufsize)
{
if(++hed->CaretCol > hed->ColumnsPerLine)
{
hed->CaretCol = 0;
hed->CaretLine++;
}
else
hed->Position++;
}
HEXEDIT_MoveCaret(hed, TRUE);
break;
case VK_UP:
if(hed->Position > 0)
{
if(hed->CaretLine <= 0)
{
hed->CaretCol = 0;
hed->Position = 0;
}
else
{
hed->CaretLine--;
hed->Position -= hed->ColumnsPerLine;
}
}
HEXEDIT_MoveCaret(hed, TRUE);
break;
case VK_DOWN:
if(hed->Position <= (INT)bufsize)
{
if(hed->CaretLine < hed->nLines - 1)
{
hed->Position += hed->ColumnsPerLine;
hed->CaretLine++;
if(hed->Position > (INT)bufsize)
{
hed->Position = (INT) bufsize;
hed->CaretLine = (hed->nLines > 0 ? hed->nLines - 1 : 0);
hed->CaretCol = (INT) bufsize % hed->ColumnsPerLine;
}
}
else
{
INT tmp = (INT) bufsize % hed->ColumnsPerLine;
hed->Position = (INT) bufsize;
hed->CaretCol = (tmp == 0 ? hed->ColumnsPerLine : tmp);
}
}
HEXEDIT_MoveCaret(hed, TRUE);
break;
}
return FALSE;
}
static LRESULT
HEXEDIT_WM_SIZE(PHEXEDIT_DATA hed, DWORD sType, WORD NewWidth, WORD NewHeight)
{
UNREFERENCED_PARAMETER(sType);
UNREFERENCED_PARAMETER(NewHeight);
UNREFERENCED_PARAMETER(NewWidth);
HEXEDIT_Update(hed);
return 0;
}
INT_PTR CALLBACK
HexEditWndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
PHEXEDIT_DATA hed;
POINTS p;
hed = (PHEXEDIT_DATA)(LONG_PTR)GetWindowLongPtr(hWnd, (DWORD_PTR)0);
switch(uMsg)
{
case WM_ERASEBKGND:
return TRUE;
case WM_PAINT:
return HEXEDIT_WM_PAINT(hed);
case WM_KEYDOWN:
return HEXEDIT_WM_KEYDOWN(hed, (INT)wParam);
case WM_VSCROLL:
return HEXEDIT_WM_VSCROLL(hed, HIWORD(wParam), LOWORD(wParam));
case WM_SIZE:
return HEXEDIT_WM_SIZE(hed, (DWORD)wParam, LOWORD(lParam), HIWORD(lParam));
case WM_LBUTTONDOWN:
{
p.x = LOWORD(lParam);
p.y = HIWORD(lParam);
return HEXEDIT_WM_LBUTTONDOWN(hed, (INT)wParam, p);
}
case WM_MOUSEWHEEL:
{
UINT nScrollLines = 3;
int delta = 0;
SystemParametersInfoW(SPI_GETWHEELSCROLLLINES, 0, &nScrollLines, 0);
delta -= (SHORT)HIWORD(wParam);
if(abs(delta) >= WHEEL_DELTA && nScrollLines != 0)
{
p.x = LOWORD(lParam);
p.y = HIWORD(lParam);
return HEXEDIT_WM_MOUSEWHEEL(hed, nScrollLines * (delta / WHEEL_DELTA), LOWORD(wParam), &p);
}
break;
}
case HEM_LOADBUFFER:
return HEXEDIT_HEM_LOADBUFFER(hed, (PVOID)wParam, (DWORD)lParam);
case HEM_COPYBUFFER:
return HEXEDIT_HEM_COPYBUFFER(hed, (PVOID)wParam, (DWORD)lParam);
case HEM_SETMAXBUFFERSIZE:
return HEXEDIT_HEM_SETMAXBUFFERSIZE(hed, (DWORD)lParam);
case WM_SETFOCUS:
return HEXEDIT_WM_SETFOCUS(hed);
case WM_KILLFOCUS:
return HEXEDIT_WM_KILLFOCUS(hed);
case WM_GETDLGCODE:
return HEXEDIT_WM_GETDLGCODE((LPMSG)lParam);
case WM_SETFONT:
return HEXEDIT_WM_SETFONT(hed, (HFONT)wParam, (BOOL)LOWORD(lParam));
case WM_GETFONT:
return HEXEDIT_WM_GETFONT(hed);
case WM_CREATE:
return HEXEDIT_WM_CREATE(hed);
case WM_NCCREATE:
if(!hed)
{
return HEXEDIT_WM_NCCREATE(hWnd, (CREATESTRUCT*)lParam);
}
break;
case WM_NCDESTROY:
if(hed)
{
return HEXEDIT_WM_NCDESTROY(hed);
}
break;
}
return CallWindowProc(DefWindowProc, hWnd, uMsg, wParam, lParam);
}