684 lines
19 KiB
C
684 lines
19 KiB
C
/*
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* Hex Edit control
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*
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* Copyright 2005 Robert Shearman
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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*
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* TODO:
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* - Selection support
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* - Cut, copy and paste
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* - Mouse support
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*/
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#include <stdarg.h>
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#include <string.h>
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#include <assert.h>
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#include "windef.h"
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#include "winbase.h"
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#include "wingdi.h"
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#include "winuser.h"
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#include "winnls.h"
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#include "commctrl.h"
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#include "wine/heap.h"
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#include "wine/unicode.h"
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#include "main.h"
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/* spaces dividing hex and ASCII */
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#define DIV_SPACES 4
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typedef struct tagHEXEDIT_INFO
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{
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HWND hwndSelf;
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HFONT hFont;
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BOOL bFocus : 1;
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BOOL bFocusHex : 1; /* TRUE if focus is on hex, FALSE if focus on ASCII */
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BOOL bInsert : 1; /* insert mode if TRUE, overwrite mode if FALSE */
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INT nHeight; /* height of text */
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INT nCaretPos; /* caret pos in nibbles */
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BYTE *pData;
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INT cbData;
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INT nBytesPerLine; /* bytes of hex to display per line of the control */
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INT nScrollPos; /* first visible line */
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} HEXEDIT_INFO;
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const WCHAR szHexEditClass[] = {'H','e','x','E','d','i','t',0};
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static inline LRESULT HexEdit_SetFont (HEXEDIT_INFO *infoPtr, HFONT hFont, BOOL redraw);
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static inline BYTE hexchar_to_byte(WCHAR ch)
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{
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if (ch >= '0' && ch <= '9')
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return ch - '0';
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else if (ch >= 'a' && ch <= 'f')
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return ch - 'a' + 10;
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else if (ch >= 'A' && ch <= 'F')
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return ch - 'A' + 10;
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else
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return -1;
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}
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static LPWSTR HexEdit_GetLineText(int offset, BYTE *pData, LONG cbData, LONG pad)
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{
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static const WCHAR percent_04xW[] = {'%','0','4','X',' ',' ',0};
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static const WCHAR percent_02xW[] = {'%','0','2','X',' ',0};
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WCHAR *lpszLine = heap_xalloc((6 + cbData * 3 + pad * 3 + DIV_SPACES + cbData + 1) * sizeof(WCHAR));
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LONG i;
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wsprintfW(lpszLine, percent_04xW, offset);
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for (i = 0; i < cbData; i++)
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wsprintfW(lpszLine + 6 + i*3, percent_02xW, pData[offset + i]);
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for (i = 0; i < pad * 3; i++)
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lpszLine[6 + cbData * 3 + i] = ' ';
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for (i = 0; i < DIV_SPACES; i++)
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lpszLine[6 + cbData * 3 + pad * 3 + i] = ' ';
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/* attempt an ASCII representation if the characters are printable,
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* otherwise display a '.' */
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for (i = 0; i < cbData; i++)
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{
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/* (C1_ALPHA|C1_BLANK|C1_PUNCT|C1_DIGIT|C1_LOWER|C1_UPPER) */
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if (isprintW(pData[offset + i]))
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lpszLine[6 + cbData * 3 + pad * 3 + DIV_SPACES + i] = pData[offset + i];
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else
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lpszLine[6 + cbData * 3 + pad * 3 + DIV_SPACES + i] = '.';
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}
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lpszLine[6 + cbData * 3 + pad * 3 + DIV_SPACES + cbData] = 0;
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return lpszLine;
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}
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static void
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HexEdit_Paint(HEXEDIT_INFO *infoPtr)
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{
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PAINTSTRUCT ps;
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HDC hdc = BeginPaint(infoPtr->hwndSelf, &ps);
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INT nXStart, nYStart;
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COLORREF clrOldText;
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HFONT hOldFont;
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INT iMode;
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LONG lByteOffset = infoPtr->nScrollPos * infoPtr->nBytesPerLine;
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int i;
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/* Make a gap from the frame */
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nXStart = GetSystemMetrics(SM_CXBORDER);
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nYStart = GetSystemMetrics(SM_CYBORDER);
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if (GetWindowLongW(infoPtr->hwndSelf, GWL_STYLE) & WS_DISABLED)
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clrOldText = SetTextColor(hdc, GetSysColor(COLOR_GRAYTEXT));
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else
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clrOldText = SetTextColor(hdc, GetSysColor(COLOR_WINDOWTEXT));
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iMode = SetBkMode(hdc, TRANSPARENT);
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hOldFont = SelectObject(hdc, infoPtr->hFont);
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for (i = lByteOffset; i < infoPtr->cbData; i += infoPtr->nBytesPerLine)
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{
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LPWSTR lpszLine;
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LONG nLineLen = min(infoPtr->cbData - i, infoPtr->nBytesPerLine);
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lpszLine = HexEdit_GetLineText(i, infoPtr->pData, nLineLen, infoPtr->nBytesPerLine - nLineLen);
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/* FIXME: draw hex <-> ASCII mapping highlighted? */
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TextOutW(hdc, nXStart, nYStart, lpszLine, lstrlenW(lpszLine));
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nYStart += infoPtr->nHeight;
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heap_free(lpszLine);
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}
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SelectObject(hdc, hOldFont);
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SetBkMode(hdc, iMode);
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SetTextColor(hdc, clrOldText);
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EndPaint(infoPtr->hwndSelf, &ps);
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}
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static void
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HexEdit_UpdateCaret(HEXEDIT_INFO *infoPtr)
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{
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HDC hdc;
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HFONT hOldFont;
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SIZE size;
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INT nCaretBytePos = infoPtr->nCaretPos/2;
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INT nByteLinePos = nCaretBytePos % infoPtr->nBytesPerLine;
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INT nLine = nCaretBytePos / infoPtr->nBytesPerLine;
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LONG nLineLen = min(infoPtr->cbData - nLine * infoPtr->nBytesPerLine, infoPtr->nBytesPerLine);
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LPWSTR lpszLine = HexEdit_GetLineText(nLine * infoPtr->nBytesPerLine, infoPtr->pData, nLineLen, infoPtr->nBytesPerLine - nLineLen);
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INT nCharOffset;
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/* calculate offset of character caret is on in the line */
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if (infoPtr->bFocusHex)
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nCharOffset = 6 + nByteLinePos*3 + infoPtr->nCaretPos % 2;
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else
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nCharOffset = 6 + infoPtr->nBytesPerLine*3 + DIV_SPACES + nByteLinePos;
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hdc = GetDC(infoPtr->hwndSelf);
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hOldFont = SelectObject(hdc, infoPtr->hFont);
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GetTextExtentPoint32W(hdc, lpszLine, nCharOffset, &size);
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SelectObject(hdc, hOldFont);
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ReleaseDC(infoPtr->hwndSelf, hdc);
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if (!nLineLen) size.cx = 0;
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heap_free(lpszLine);
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SetCaretPos(
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GetSystemMetrics(SM_CXBORDER) + size.cx,
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GetSystemMetrics(SM_CYBORDER) + (nLine - infoPtr->nScrollPos) * infoPtr->nHeight);
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}
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static void
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HexEdit_UpdateScrollbars(HEXEDIT_INFO *infoPtr)
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{
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RECT rcClient;
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INT nLines = infoPtr->cbData / infoPtr->nBytesPerLine;
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INT nVisibleLines;
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SCROLLINFO si;
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GetClientRect(infoPtr->hwndSelf, &rcClient);
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InflateRect(&rcClient, -GetSystemMetrics(SM_CXBORDER), -GetSystemMetrics(SM_CYBORDER));
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nVisibleLines = (rcClient.bottom - rcClient.top) / infoPtr->nHeight;
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si.cbSize = sizeof(si);
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si.fMask = SIF_RANGE | SIF_PAGE;
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si.nMin = 0;
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si.nMax = max(nLines - nVisibleLines, nLines);
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si.nPage = nVisibleLines;
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SetScrollInfo(infoPtr->hwndSelf, SB_VERT, &si, TRUE);
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}
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static void
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HexEdit_EnsureVisible(HEXEDIT_INFO *infoPtr, INT nCaretPos)
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{
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INT nLine = nCaretPos / (2 * infoPtr->nBytesPerLine);
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SCROLLINFO si;
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si.cbSize = sizeof(si);
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si.fMask = SIF_POS | SIF_PAGE;
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GetScrollInfo(infoPtr->hwndSelf, SB_VERT, &si);
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if (nLine < si.nPos)
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si.nPos = nLine;
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else if (nLine >= si.nPos + si.nPage)
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si.nPos = nLine - si.nPage + 1;
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else
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return;
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si.fMask = SIF_POS;
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SetScrollInfo(infoPtr->hwndSelf, SB_VERT, &si, FALSE);
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SendMessageW(infoPtr->hwndSelf, WM_VSCROLL, MAKELONG(SB_THUMBPOSITION, 0), 0);
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}
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static LRESULT
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HexEdit_SetData(HEXEDIT_INFO *infoPtr, INT cbData, const BYTE *pData)
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{
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heap_free(infoPtr->pData);
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infoPtr->cbData = 0;
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infoPtr->pData = heap_xalloc(cbData);
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memcpy(infoPtr->pData, pData, cbData);
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infoPtr->cbData = cbData;
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infoPtr->nCaretPos = 0;
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HexEdit_UpdateScrollbars(infoPtr);
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HexEdit_UpdateCaret(infoPtr);
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InvalidateRect(infoPtr->hwndSelf, NULL, TRUE);
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return TRUE;
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}
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static LRESULT
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HexEdit_GetData(HEXEDIT_INFO *infoPtr, INT cbData, BYTE *pData)
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{
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if (pData)
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memcpy(pData, infoPtr->pData, min(cbData, infoPtr->cbData));
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return infoPtr->cbData;
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}
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static inline LRESULT
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HexEdit_Char (HEXEDIT_INFO *infoPtr, WCHAR ch)
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{
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INT nCaretBytePos = infoPtr->nCaretPos/2;
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assert(nCaretBytePos >= 0);
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/* backspace is special */
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if (ch == '\b')
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{
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if (infoPtr->nCaretPos == 0)
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return 0;
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/* if at end of byte then delete the whole byte */
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if (infoPtr->bFocusHex && (infoPtr->nCaretPos % 2 == 0))
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{
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memmove(infoPtr->pData + nCaretBytePos - 1,
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infoPtr->pData + nCaretBytePos,
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infoPtr->cbData - nCaretBytePos);
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infoPtr->cbData--;
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infoPtr->nCaretPos -= 2; /* backtrack two nibble */
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}
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else /* blank upper nibble */
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{
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infoPtr->pData[nCaretBytePos] &= 0x0f;
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infoPtr->nCaretPos--; /* backtrack one nibble */
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}
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}
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else
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{
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if (infoPtr->bFocusHex && hexchar_to_byte(ch) == (BYTE)-1)
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{
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MessageBeep(MB_ICONWARNING);
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return 0;
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}
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if ((infoPtr->bInsert && (infoPtr->nCaretPos % 2 == 0)) || (nCaretBytePos >= infoPtr->cbData))
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{
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/* make room for another byte */
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infoPtr->cbData++;
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infoPtr->pData = heap_xrealloc(infoPtr->pData, infoPtr->cbData + 1);
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/* move everything after caret up one byte */
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memmove(infoPtr->pData + nCaretBytePos + 1,
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infoPtr->pData + nCaretBytePos,
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infoPtr->cbData - nCaretBytePos);
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/* zero new byte */
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infoPtr->pData[nCaretBytePos] = 0x0;
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}
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/* overwrite a byte */
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assert(nCaretBytePos < infoPtr->cbData);
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if (infoPtr->bFocusHex)
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{
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BYTE orig_byte = infoPtr->pData[nCaretBytePos];
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BYTE digit = hexchar_to_byte(ch);
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if (infoPtr->nCaretPos % 2) /* set low nibble */
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infoPtr->pData[nCaretBytePos] = (orig_byte & 0xf0) | digit;
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else /* set high nibble */
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infoPtr->pData[nCaretBytePos] = (orig_byte & 0x0f) | digit << 4;
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infoPtr->nCaretPos++; /* advance one nibble */
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}
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else
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{
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infoPtr->pData[nCaretBytePos] = (BYTE)ch;
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infoPtr->nCaretPos += 2; /* advance two nibbles */
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}
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}
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HexEdit_UpdateScrollbars(infoPtr);
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InvalidateRect(infoPtr->hwndSelf, NULL, TRUE);
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HexEdit_UpdateCaret(infoPtr);
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HexEdit_EnsureVisible(infoPtr, infoPtr->nCaretPos);
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return 0;
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}
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static inline LRESULT
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HexEdit_Destroy (HEXEDIT_INFO *infoPtr)
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{
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HWND hwnd = infoPtr->hwndSelf;
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heap_free(infoPtr->pData);
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/* free info data */
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heap_free(infoPtr);
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SetWindowLongPtrW(hwnd, 0, 0);
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return 0;
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}
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static inline LRESULT
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HexEdit_EraseBackground (HEXEDIT_INFO *infoPtr, HDC hdc)
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{
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HBRUSH hBrush, hSolidBrush = NULL;
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RECT rc;
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if (GetWindowLongW(infoPtr->hwndSelf, GWL_STYLE) & WS_DISABLED)
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hBrush = hSolidBrush = CreateSolidBrush(GetSysColor(COLOR_BTNFACE));
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else
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{
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hBrush = (HBRUSH)SendMessageW(GetParent(infoPtr->hwndSelf), WM_CTLCOLOREDIT,
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(WPARAM)hdc, (LPARAM)infoPtr->hwndSelf);
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if (!hBrush)
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hBrush = hSolidBrush = CreateSolidBrush(GetSysColor(COLOR_WINDOW));
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}
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GetClientRect (infoPtr->hwndSelf, &rc);
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FillRect (hdc, &rc, hBrush);
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if (hSolidBrush)
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DeleteObject(hSolidBrush);
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return -1;
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}
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static inline LRESULT
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HexEdit_GetFont (HEXEDIT_INFO *infoPtr)
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{
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return (LRESULT)infoPtr->hFont;
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}
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static inline LRESULT
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HexEdit_KeyDown (HEXEDIT_INFO *infoPtr, DWORD key, DWORD flags)
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{
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INT nInc = (infoPtr->bFocusHex) ? 1 : 2;
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SCROLLINFO si;
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switch (key)
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{
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case VK_LEFT:
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infoPtr->nCaretPos -= nInc;
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if (infoPtr->nCaretPos < 0)
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infoPtr->nCaretPos = 0;
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break;
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case VK_RIGHT:
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infoPtr->nCaretPos += nInc;
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if (infoPtr->nCaretPos > infoPtr->cbData*2)
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infoPtr->nCaretPos = infoPtr->cbData*2;
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break;
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case VK_UP:
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if ((infoPtr->nCaretPos - infoPtr->nBytesPerLine*2) >= 0)
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infoPtr->nCaretPos -= infoPtr->nBytesPerLine*2;
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break;
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case VK_DOWN:
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if ((infoPtr->nCaretPos + infoPtr->nBytesPerLine*2) <= infoPtr->cbData*2)
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infoPtr->nCaretPos += infoPtr->nBytesPerLine*2;
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break;
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case VK_HOME:
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infoPtr->nCaretPos = 0;
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break;
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case VK_END:
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infoPtr->nCaretPos = infoPtr->cbData*2;
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break;
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case VK_PRIOR: /* page up */
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si.cbSize = sizeof(si);
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si.fMask = SIF_PAGE;
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GetScrollInfo(infoPtr->hwndSelf, SB_VERT, &si);
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if ((infoPtr->nCaretPos - (INT)si.nPage*infoPtr->nBytesPerLine*2) >= 0)
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infoPtr->nCaretPos -= si.nPage*infoPtr->nBytesPerLine*2;
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else
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infoPtr->nCaretPos = 0;
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break;
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case VK_NEXT: /* page down */
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si.cbSize = sizeof(si);
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si.fMask = SIF_PAGE;
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GetScrollInfo(infoPtr->hwndSelf, SB_VERT, &si);
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if ((infoPtr->nCaretPos + (INT)si.nPage*infoPtr->nBytesPerLine*2) <= infoPtr->cbData*2)
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infoPtr->nCaretPos += si.nPage*infoPtr->nBytesPerLine*2;
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else
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infoPtr->nCaretPos = infoPtr->cbData*2;
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break;
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default:
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return 0;
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}
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HexEdit_UpdateCaret(infoPtr);
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HexEdit_EnsureVisible(infoPtr, infoPtr->nCaretPos);
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return 0;
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}
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static inline LRESULT
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HexEdit_KillFocus (HEXEDIT_INFO *infoPtr, HWND receiveFocus)
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{
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infoPtr->bFocus = FALSE;
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DestroyCaret();
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return 0;
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}
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static inline LRESULT
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HexEdit_LButtonDown (HEXEDIT_INFO *infoPtr)
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{
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SetFocus(infoPtr->hwndSelf);
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/* FIXME: hittest and set caret */
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return 0;
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}
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static inline LRESULT HexEdit_NCCreate (HWND hwnd, LPCREATESTRUCTW lpcs)
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{
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HEXEDIT_INFO *infoPtr;
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SetWindowLongW(hwnd, GWL_EXSTYLE,
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lpcs->dwExStyle | WS_EX_CLIENTEDGE);
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/* allocate memory for info structure */
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infoPtr = heap_xalloc(sizeof(HEXEDIT_INFO));
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memset(infoPtr, 0, sizeof(HEXEDIT_INFO));
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SetWindowLongPtrW(hwnd, 0, (DWORD_PTR)infoPtr);
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/* initialize info structure */
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infoPtr->nCaretPos = 0;
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infoPtr->hwndSelf = hwnd;
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infoPtr->nBytesPerLine = 2;
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infoPtr->bFocusHex = TRUE;
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infoPtr->bInsert = TRUE;
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return DefWindowProcW(infoPtr->hwndSelf, WM_NCCREATE, 0, (LPARAM)lpcs);
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}
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static inline LRESULT
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HexEdit_SetFocus (HEXEDIT_INFO *infoPtr, HWND lostFocus)
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{
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infoPtr->bFocus = TRUE;
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CreateCaret(infoPtr->hwndSelf, NULL, 1, infoPtr->nHeight);
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HexEdit_UpdateCaret(infoPtr);
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ShowCaret(infoPtr->hwndSelf);
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return 0;
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}
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static inline LRESULT
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HexEdit_SetFont (HEXEDIT_INFO *infoPtr, HFONT hFont, BOOL redraw)
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{
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TEXTMETRICW tm;
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HDC hdc;
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HFONT hOldFont = NULL;
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LONG i;
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RECT rcClient;
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infoPtr->hFont = hFont;
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hdc = GetDC(infoPtr->hwndSelf);
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if (infoPtr->hFont)
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hOldFont = SelectObject(hdc, infoPtr->hFont);
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GetTextMetricsW(hdc, &tm);
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infoPtr->nHeight = tm.tmHeight + tm.tmExternalLeading;
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GetClientRect(infoPtr->hwndSelf, &rcClient);
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for (i = 0; ; i++)
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{
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BYTE *pData = heap_xalloc(i);
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WCHAR *lpszLine;
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SIZE size;
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memset(pData, 0, i);
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lpszLine = HexEdit_GetLineText(0, pData, i, 0);
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GetTextExtentPoint32W(hdc, lpszLine, lstrlenW(lpszLine), &size);
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heap_free(lpszLine);
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heap_free(pData);
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if (size.cx > (rcClient.right - rcClient.left))
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{
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infoPtr->nBytesPerLine = i - 1;
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break;
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}
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}
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HexEdit_UpdateScrollbars(infoPtr);
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if (infoPtr->hFont)
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SelectObject(hdc, hOldFont);
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ReleaseDC (infoPtr->hwndSelf, hdc);
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if (redraw)
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InvalidateRect(infoPtr->hwndSelf, NULL, TRUE);
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return 0;
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}
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static inline LRESULT
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HexEdit_VScroll (HEXEDIT_INFO *infoPtr, INT action)
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{
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SCROLLINFO si;
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/* get all scroll bar info */
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si.cbSize = sizeof(si);
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si.fMask = SIF_ALL;
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GetScrollInfo(infoPtr->hwndSelf, SB_VERT, &si);
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switch (LOWORD(action))
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{
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case SB_TOP: /* user pressed the home key */
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si.nPos = si.nMin;
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break;
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case SB_BOTTOM: /* user pressed the end key */
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si.nPos = si.nMax;
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break;
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case SB_LINEUP: /* user clicked the up arrow */
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si.nPos -= 1;
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break;
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case SB_LINEDOWN: /* user clicked the down arrow */
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si.nPos += 1;
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break;
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case SB_PAGEUP: /* user clicked the scroll bar above the scroll thumb */
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si.nPos -= si.nPage;
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break;
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case SB_PAGEDOWN: /* user clicked the scroll bar below the scroll thumb */
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si.nPos += si.nPage;
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break;
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case SB_THUMBTRACK: /* user dragged the scroll thumb */
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si.nPos = si.nTrackPos;
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break;
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default:
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break;
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}
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/* set the position and then retrieve it to let the system handle the
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* cases where the position is out of range */
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si.fMask = SIF_POS;
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SetScrollInfo(infoPtr->hwndSelf, SB_VERT, &si, TRUE);
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GetScrollInfo(infoPtr->hwndSelf, SB_VERT, &si);
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if (si.nPos != infoPtr->nScrollPos)
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{
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ScrollWindow(infoPtr->hwndSelf, 0, infoPtr->nHeight * (infoPtr->nScrollPos - si.nPos), NULL, NULL);
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infoPtr->nScrollPos = si.nPos;
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UpdateWindow(infoPtr->hwndSelf);
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/* need to update caret position since it depends on the scroll position */
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HexEdit_UpdateCaret(infoPtr);
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}
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return 0;
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}
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static LRESULT WINAPI
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HexEdit_WindowProc (HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
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{
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HEXEDIT_INFO *infoPtr = (HEXEDIT_INFO *)GetWindowLongPtrW(hwnd, 0);
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if (!infoPtr && (uMsg != WM_NCCREATE))
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return DefWindowProcW(hwnd, uMsg, wParam, lParam);
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switch (uMsg)
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{
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case HEM_SETDATA:
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return HexEdit_SetData (infoPtr, (INT)wParam, (const BYTE *)lParam);
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case HEM_GETDATA:
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return HexEdit_GetData (infoPtr, (INT)wParam, (BYTE *)lParam);
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case WM_CHAR:
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return HexEdit_Char (infoPtr, (WCHAR)wParam);
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case WM_DESTROY:
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return HexEdit_Destroy (infoPtr);
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case WM_ERASEBKGND:
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return HexEdit_EraseBackground (infoPtr, (HDC)wParam);
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case WM_GETDLGCODE:
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return DLGC_WANTCHARS | DLGC_WANTARROWS;
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case WM_GETFONT:
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return HexEdit_GetFont (infoPtr);
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case WM_KEYDOWN:
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return HexEdit_KeyDown (infoPtr, wParam, lParam);
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case WM_KILLFOCUS:
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return HexEdit_KillFocus (infoPtr, (HWND)wParam);
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case WM_LBUTTONDOWN:
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return HexEdit_LButtonDown (infoPtr);
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case WM_NCCREATE:
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return HexEdit_NCCreate (hwnd, (LPCREATESTRUCTW)lParam);
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case WM_PAINT:
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HexEdit_Paint(infoPtr);
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return 0;
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case WM_SETFOCUS:
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return HexEdit_SetFocus (infoPtr, (HWND)wParam);
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case WM_SETFONT:
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return HexEdit_SetFont (infoPtr, (HFONT)wParam, LOWORD(lParam));
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case WM_VSCROLL:
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return HexEdit_VScroll (infoPtr, (INT)wParam);
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default:
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return DefWindowProcW(hwnd, uMsg, wParam, lParam);
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}
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return 0;
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}
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void HexEdit_Register(void)
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{
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WNDCLASSW wndClass;
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ZeroMemory(&wndClass, sizeof(WNDCLASSW));
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wndClass.style = 0;
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wndClass.lpfnWndProc = HexEdit_WindowProc;
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wndClass.cbClsExtra = 0;
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wndClass.cbWndExtra = sizeof(HEXEDIT_INFO *);
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wndClass.hCursor = NULL;
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wndClass.hbrBackground = NULL;
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wndClass.lpszClassName = szHexEditClass;
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RegisterClassW(&wndClass);
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}
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