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hexedit.c
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hexedit.c
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/*
* 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 Index;
INT LineHeight;
INT CharWidth;
HFONT hFont;
BOOL SbVisible;
INT LeftMargin;
INT AddressSpacing;
INT SplitSpacing;
BOOL EditingField;
INT CaretCol;
INT CaretLine;
BOOL InMid;
INT SelStart;
INT SelEnd;
} HEXEDIT_DATA, *PHEXEDIT_DATA;
static const WCHAR ClipboardFormatName[] = L"RegEdit_HexData";
static UINT ClipboardFormatID = 0;
/* 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)
LRESULT CALLBACK HexEditWndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam);
ATOM
WINAPI
RegisterHexEditorClass(HINSTANCE hInstance)
{
WNDCLASSEXW WndClass;
ClipboardFormatID = RegisterClipboardFormatW(ClipboardFormatName);
ZeroMemory(&WndClass, sizeof(WNDCLASSEXW));
WndClass.cbSize = sizeof(WNDCLASSEXW);
WndClass.style = CS_DBLCLKS;
WndClass.lpfnWndProc = HexEditWndProc;
WndClass.cbWndExtra = sizeof(PHEXEDIT_DATA);
WndClass.hInstance = hInstance;
WndClass.hCursor = LoadCursorW(NULL, IDC_IBEAM);
WndClass.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1);
WndClass.lpszClassName = HEX_EDIT_CLASS_NAME;
return RegisterClassEx(&WndClass);
}
BOOL
WINAPI
UnregisterHexEditorClass(HINSTANCE hInstance)
{
return UnregisterClassW(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->InMid * 2) * 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 i, isave, i0, i1, x;
PBYTE buf, current, end, line;
size_t bufsize;
WCHAR hex[3], addr[17];
RECT rct, rct2;
FillRect(hDC, rc, (HBRUSH)(COLOR_WINDOW + 1));
SetTextColor(hDC, GetSysColor(COLOR_WINDOWTEXT));
if (hed->SelStart < hed->SelEnd)
{
i0 = hed->SelStart;
i1 = hed->SelEnd;
}
else
{
i0 = hed->SelEnd;
i1 = hed->SelStart;
}
if(hed->hBuffer)
{
bufsize = LocalSize(hed->hBuffer);
buf = LocalLock(hed->hBuffer);
}
else
{
buf = NULL;
bufsize = 0;
if(ScrollPos + First == 0)
{
/* draw address */
wsprintf(addr, L"%04X", 0);
TextOutW(hDC, hed->LeftMargin, First * hed->LineHeight, addr, 4);
}
}
if(buf)
{
end = buf + bufsize;
dy = First * hed->LineHeight;
linestart = (ScrollPos + First) * hed->ColumnsPerLine;
i = linestart;
current = buf + linestart;
Last = min(hed->nLines - ScrollPos, Last);
SetBkMode(hDC, TRANSPARENT);
while(First <= Last && current < end)
{
DWORD dh;
dx = hed->LeftMargin;
/* draw address */
wsprintf(addr, L"%04lX", linestart);
TextOutW(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;
isave = i;
for(x = 0; x < hed->ColumnsPerLine && current < end; x++)
{
rct.left += dh;
rct.right += dh;
wsprintf(hex, L"%02X", *(current++));
if (i0 <= i && i < i1)
{
rct2.left = dx;
rct2.top = dy;
rct2.right = dx + hed->CharWidth * 2 + 1;
rct2.bottom = dy + hed->LineHeight;
InflateRect(&rct2, hed->CharWidth / 2, 0);
FillRect(hDC, &rct2, (HBRUSH)(COLOR_HIGHLIGHT + 1));
SetTextColor(hDC, GetSysColor(COLOR_HIGHLIGHTTEXT));
ExtTextOutW(hDC, dx, dy, 0, &rct, hex, 2, NULL);
SetTextColor(hDC, GetSysColor(COLOR_WINDOWTEXT));
}
else
ExtTextOutW(hDC, dx, dy, ETO_OPAQUE, &rct, hex, 2, NULL);
dx += dh;
i++;
}
/* draw ascii map */
dx = ((4 + hed->AddressSpacing + hed->SplitSpacing + (hed->ColumnsPerLine * 3)) * hed->CharWidth);
current = line;
i = isave;
for(x = 0; x < hed->ColumnsPerLine && current < end; x++)
{
wsprintf(hex, L"%C", *(current++));
hex[0] = ((hex[0] & L'\x007f') >= L' ' ? hex[0] : L'.');
if (i0 <= i && i < i1)
{
rct2.left = dx;
rct2.top = dy;
rct2.right = dx + hed->CharWidth;
rct2.bottom = dy + hed->LineHeight;
FillRect(hDC, &rct2, (HBRUSH)(COLOR_HIGHLIGHT + 1));
SetTextColor(hDC, GetSysColor(COLOR_HIGHLIGHTTEXT));
TextOutW(hDC, dx, dy, hex, 1);
SetTextColor(hDC, GetSysColor(COLOR_WINDOWTEXT));
}
else
TextOutW(hDC, dx, dy, hex, 1);
dx += hed->CharWidth;
i++;
}
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 + 1) * hed->CharWidth);
if(pt.x <= d)
{
return HEHT_HEXDUMP;
}
pt.x -= d;
d = ((hed->SplitSpacing - 1) * 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_IndexFromPoint(PHEXEDIT_DATA hed, POINTS pt, DWORD Hit, POINT *EditPos, BOOL *EditField)
{
SCROLLINFO si;
DWORD Index, 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 / 2) / BlockWidth);
}
bufsize = (hed->hBuffer ? (DWORD) LocalSize(hed->hBuffer) : 0);
Index = (EditPos->y * hed->ColumnsPerLine) + EditPos->x;
if(Index > bufsize)
{
INT tmp = bufsize % hed->ColumnsPerLine;
Index = bufsize;
EditPos->x = (tmp == 0 ? hed->ColumnsPerLine : tmp);
}
return Index;
}
static VOID
HEXEDIT_Copy(PHEXEDIT_DATA hed)
{
PBYTE pb, buf;
UINT cb;
INT i0, i1;
HGLOBAL hGlobal;
if (hed->SelStart < hed->SelEnd)
{
i0 = hed->SelStart;
i1 = hed->SelEnd;
}
else
{
i0 = hed->SelEnd;
i1 = hed->SelStart;
}
cb = i1 - i0;
if (cb == 0)
return;
hGlobal = GlobalAlloc(GHND | GMEM_SHARE, cb + sizeof(DWORD));
if (hGlobal == NULL)
return;
pb = GlobalLock(hGlobal);
if (pb)
{
*(PDWORD)pb = cb;
pb += sizeof(DWORD);
buf = (PBYTE) LocalLock(hed->hBuffer);
if (buf)
{
CopyMemory(pb, buf + i0, cb);
LocalUnlock(hed->hBuffer);
}
GlobalUnlock(hGlobal);
if (OpenClipboard(hed->hWndSelf))
{
EmptyClipboard();
SetClipboardData(ClipboardFormatID, hGlobal);
CloseClipboard();
}
}
else
GlobalFree(hGlobal);
}
static VOID
HEXEDIT_Delete(PHEXEDIT_DATA hed)
{
PBYTE buf;
INT i0, i1;
UINT bufsize;
if (hed->SelStart < hed->SelEnd)
{
i0 = hed->SelStart;
i1 = hed->SelEnd;
}
else
{
i0 = hed->SelEnd;
i1 = hed->SelStart;
}
if (i0 != i1)
{
bufsize = (hed->hBuffer ? LocalSize(hed->hBuffer) : 0);
buf = (PBYTE) LocalLock(hed->hBuffer);
if (buf)
{
MoveMemory(buf + i0, buf + i1, bufsize - i1);
LocalUnlock(hed->hBuffer);
}
HexEdit_SetMaxBufferSize(hed->hWndSelf, bufsize - (i1 - i0));
hed->InMid = FALSE;
hed->Index = hed->SelStart = hed->SelEnd = i0;
hed->CaretCol = hed->Index % hed->ColumnsPerLine;
hed->CaretLine = hed->Index / hed->ColumnsPerLine;
InvalidateRect(hed->hWndSelf, NULL, TRUE);
HEXEDIT_MoveCaret(hed, TRUE);
}
}
static VOID
HEXEDIT_Paste(PHEXEDIT_DATA hed)
{
HGLOBAL hGlobal;
UINT bufsize;
PBYTE pb, buf;
DWORD cb;
HEXEDIT_Delete(hed);
bufsize = (hed->hBuffer ? LocalSize(hed->hBuffer) : 0);
if (OpenClipboard(hed->hWndSelf))
{
hGlobal = GetClipboardData(ClipboardFormatID);
if (hGlobal != NULL)
{
pb = (PBYTE) GlobalLock(hGlobal);
cb = *(PDWORD) pb;
pb += sizeof(DWORD);
HexEdit_SetMaxBufferSize(hed->hWndSelf, bufsize + cb);
buf = (PBYTE) LocalLock(hed->hBuffer);
if (buf)
{
MoveMemory(buf + hed->Index + cb, buf + hed->Index,
bufsize - hed->Index);
CopyMemory(buf + hed->Index, pb, cb);
LocalUnlock(hed->hBuffer);
}
GlobalUnlock(hGlobal);
}
CloseClipboard();
}
InvalidateRect(hed->hWndSelf, NULL, TRUE);
HEXEDIT_MoveCaret(hed, TRUE);
}
static VOID
HEXEDIT_Cut(PHEXEDIT_DATA hed)
{
HEXEDIT_Copy(hed);
HEXEDIT_Delete(hed);
}
static VOID
HEXEDIT_SelectAll(PHEXEDIT_DATA hed)
{
INT bufsize;
bufsize = (hed->hBuffer ? (INT) LocalSize(hed->hBuffer) : 0);
hed->Index = hed->SelStart = 0;
hed->SelEnd = bufsize;
InvalidateRect(hed->hWndSelf, NULL, TRUE);
HEXEDIT_MoveCaret(hed, TRUE);
}
/*** 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->Index = 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->Index = 0;
HEXEDIT_Update(hed);
return Size;
}
else if(hed->hBuffer)
{
hed->Index = 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 = LocalFree(hed->hBuffer);
return 0;
}
if (hed->hBuffer)
hed->hBuffer = LocalReAlloc(hed->hBuffer, hed->MaxBuffer, LMEM_MOVEABLE);
else
hed->hBuffer = LocalAlloc(LMEM_MOVEABLE, hed->MaxBuffer);
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(ps.hdc, 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;
UNREFERENCED_PARAMETER(Buttons);
SetFocus(hed->hWndSelf);
if (GetAsyncKeyState(VK_SHIFT) < 0)
{
if (hed->EditingField)
hed->Index = HEXEDIT_IndexFromPoint(hed, Pt, HEHT_HEXDUMP, &EditPos, &NewField);
else
hed->Index = HEXEDIT_IndexFromPoint(hed, Pt, HEHT_ASCIIDUMP, &EditPos, &NewField);
hed->SelEnd = hed->Index;
}
else
{
Hit = HEXEDIT_HitRegionTest(hed, Pt);
hed->Index = HEXEDIT_IndexFromPoint(hed, Pt, Hit, &EditPos, &NewField);
hed->SelStart = hed->SelEnd = hed->Index;
hed->EditingField = NewField;
SetCapture(hed->hWndSelf);
}
hed->CaretCol = EditPos.x;
hed->CaretLine = EditPos.y;
hed->InMid = FALSE;
InvalidateRect(hed->hWndSelf, NULL, FALSE);
HEXEDIT_MoveCaret(hed, TRUE);
return 0;
}
static LRESULT
HEXEDIT_WM_LBUTTONUP(PHEXEDIT_DATA hed, INT Buttons, POINTS Pt)
{
BOOL NewField;
POINT EditPos;
if (GetCapture() == hed->hWndSelf)
{
if (hed->EditingField)
hed->Index = HEXEDIT_IndexFromPoint(hed, Pt, HEHT_HEXDUMP, &EditPos, &NewField);
else
hed->Index = HEXEDIT_IndexFromPoint(hed, Pt, HEHT_ASCIIDUMP, &EditPos, &NewField);
hed->CaretCol = EditPos.x;
hed->CaretLine = EditPos.y;
hed->SelEnd = hed->Index;
ReleaseCapture();
InvalidateRect(hed->hWndSelf, NULL, FALSE);
HEXEDIT_MoveCaret(hed, TRUE);
}
return 0;