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BinaryCompareView.cpp
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// BinaryCompareView.cpp : implementation file
//
#include "stdafx.h"
#include "AlegrDiff.h"
#include "BinaryCompareView.h"
#include "BinaryCompareDoc.h"
#include "ChildFrm.h"
#include "DifferenceProgressDialog.h"
#include <afxpriv.h>
#include "GdiObjectSave.h"
#include "BinaryGoToDlg.h"
#include ".\binarycompareview.h"
// CBinaryCompareView
IMPLEMENT_DYNCREATE(CBinaryCompareView, CView)
CBinaryCompareView::CBinaryCompareView()
: m_ScreenFilePos(0)
, m_WheelAccumulator(0)
, m_BytesPerLine(16)
, m_WordSize(1)
, m_FirstPosSeen(0)
, m_DrawnSelBegin(0)
, m_DrawnSelEnd(0)
, m_ScrollDataScale(1)
, m_LButtonDown(FALSE)
, m_PreferredRect(0, 0, 0, 0)
, m_VisibleRect(0, 0, 0, 0)
, m_TrackingSelection(FALSE)
, m_bShowSecondFile(FALSE)
, m_bCaretOnChars(FALSE)
, m_AddressMarginWidth(0)
, m_MaxAddressChars(0)
, m_PaneWithFocus(0)
{
m_FontMetric.tmAveCharWidth = 1;
m_FontMetric.tmExternalLeading = 1;
m_FontMetric.tmHeight = 1;
m_NumberOfPanes = GetApp()->m_NumberOfPanes;
}
CBinaryCompareView::~CBinaryCompareView()
{
}
BEGIN_MESSAGE_MAP(CBinaryCompareView, BaseClass)
ON_COMMAND(ID_FILE_CANCEL, OnWindowCloseDiff)
ON_WM_KEYDOWN()
ON_WM_VSCROLL()
ON_WM_HSCROLL()
ON_WM_SIZE()
ON_WM_MOUSEWHEEL()
ON_WM_KILLFOCUS()
ON_WM_CAPTURECHANGED()
ON_WM_LBUTTONDOWN()
ON_WM_LBUTTONUP()
ON_WM_MOUSEMOVE()
ON_COMMAND(ID_WORDSIZE_1BYTE, OnWordsize1byte)
ON_UPDATE_COMMAND_UI(ID_WORDSIZE_1BYTE, OnUpdateWordsize1byte)
ON_COMMAND(ID_WORDSIZE_2BYTES, OnWordsize2bytes)
ON_UPDATE_COMMAND_UI(ID_WORDSIZE_2BYTES, OnUpdateWordsize2bytes)
ON_COMMAND(ID_WORDSIZE_4BYTES, OnWordsize4bytes)
ON_UPDATE_COMMAND_UI(ID_WORDSIZE_4BYTES, OnUpdateWordsize4bytes)
ON_COMMAND(ID_WORDSIZE_8BYTES, OnWordsize8bytes)
ON_UPDATE_COMMAND_UI(ID_WORDSIZE_8BYTES, OnUpdateWordsize8bytes)
ON_WM_CONTEXTMENU()
ON_COMMAND(ID_BINDIFF_SHOWFIRSTFILE, OnBindiffShowfirstfile)
ON_UPDATE_COMMAND_UI(ID_BINDIFF_SHOWFIRSTFILE, OnUpdateBindiffShowfirstfile)
ON_COMMAND(ID_BINDIFF_SHOW2NDFILE, OnBindiffShow2ndfile)
ON_UPDATE_COMMAND_UI(ID_BINDIFF_SHOW2NDFILE, OnUpdateBindiffShow2ndfile)
ON_WM_SETFOCUS()
ON_COMMAND(ID_EDIT_GOTONEXTDIFF, OnEditGotonextdiff)
ON_COMMAND(ID_EDIT_GOTOPREVDIFF, OnEditGotoprevdiff)
ON_COMMAND(ID_VIEW_LESSBYTESINLINE, OnViewLessbytesinline)
ON_UPDATE_COMMAND_UI(ID_VIEW_LESSBYTESINLINE, OnUpdateViewLessbytesinline)
ON_COMMAND(ID_VIEW_MOREBYTESINLINE, OnViewMorebytesinline)
ON_UPDATE_COMMAND_UI(ID_VIEW_MOREBYTESINLINE, OnUpdateViewMorebytesinline)
ON_COMMAND(IDC_VIEW_SIDE_BY_SIDE, OnViewSideBySide)
ON_UPDATE_COMMAND_UI(IDC_VIEW_SIDE_BY_SIDE, OnUpdateViewSideBySide)
ON_COMMAND(ID_EDIT_GOTOLINE, OnEditGoto)
END_MESSAGE_MAP()
struct BufferedDraw
{
BufferedDraw(CDC* dc, const RECT* clip_rect, unsigned hide_chars, INT char_width)
: pDC(dc), ClipRect(*clip_rect), HideChars(hide_chars), CharWidth(char_width)
{}
~BufferedDraw()
{
Flush();
}
void Draw(LPCTSTR str, unsigned char_position,
COLORREF text_color, COLORREF BG);
void Flush();
CDC* pDC;
const RECT ClipRect;
unsigned const HideChars;
INT CharWidth;
TCHAR Buffer[256];
unsigned BufFilled = 0;
unsigned BufBeginPos = 0;
COLORREF BufTextColor = 0;
COLORREF BufBgColor = 0;
};
void BufferedDraw::Draw(LPCTSTR str, unsigned char_position,
COLORREF text_color, COLORREF BG)
{
unsigned len = (unsigned) _tcslen(str);
if (BufFilled != 0
&& (text_color != BufTextColor
|| BG != BufBgColor
|| char_position != BufBeginPos + BufFilled)
|| BufFilled + len > sizeof Buffer / sizeof Buffer[0])
{
Flush();
}
if (BufFilled == 0)
{
BufTextColor = text_color;
BufBgColor = BG;
BufBeginPos = char_position;
}
while (len != 0)
{
unsigned to_copy = len;
if (to_copy > sizeof Buffer / sizeof Buffer[0] - BufFilled)
{
to_copy = sizeof Buffer / sizeof Buffer[0] - BufFilled;
}
memcpy(Buffer + BufFilled, str, to_copy * sizeof Buffer[0]);
str += to_copy;
BufFilled += to_copy;
char_position += to_copy;
len -= to_copy;
if (BufFilled == sizeof Buffer / sizeof Buffer[0])
{
Flush();
}
}
}
void BufferedDraw::Flush()
{
if (BufFilled == 0)
{
return;
}
int to_draw = BufFilled;
unsigned pos_to_draw = BufBeginPos;
LPCTSTR buf_to_draw = Buffer;
if (pos_to_draw < HideChars)
{
unsigned const adjust_by = HideChars - pos_to_draw;
buf_to_draw += adjust_by;
pos_to_draw += adjust_by;
to_draw -= adjust_by;
}
if (to_draw > 0)
{
CRect out_rect(ClipRect);
out_rect.left += (pos_to_draw - HideChars) * CharWidth;
out_rect.right = out_rect.left + to_draw * CharWidth;
if (out_rect.right > ClipRect.right)
{
out_rect.right = ClipRect.right;
}
if (out_rect.right > out_rect.left)
{
pDC->SetBkColor(BufBgColor);
pDC->SetTextColor(BufTextColor);
pDC->ExtTextOut(out_rect.left, ClipRect.top, ETO_CLIPPED | ETO_OPAQUE, out_rect,
buf_to_draw, to_draw, NULL);
}
}
BufBeginPos += BufFilled;
BufFilled = 0;
}
void CBinaryCompareView::OnDraw(CDC* pDC)
{
CBinaryCompareDoc* pDoc = GetDocument();
CThisApp * pApp = GetApp();
if (NULL == pDoc)
{
return;
}
BinaryFilePair* pFilePair = GetFilePair();
if (NULL == pFilePair)
{
return;
}
RECT cr;
GetClientRect( & cr);
RECT ur; // update rect
if (pDC->IsKindOf(RUNTIME_CLASS(CPaintDC)))
{
CPaintDC* pPaintDC = (CPaintDC*)pDC;
if (pPaintDC->m_ps.fErase)
{
//EraseBkgnd(pPaintDC);
}
ur = pPaintDC->m_ps.rcPaint;
}
else
{
pDC->GetClipBox( & ur);
}
CGdiObjectSaveT<CFont> OldFont(pDC, pDC->SelectObject( & pApp->m_NormalFont));
pDC->SetTextAlign(TA_TOP|TA_LEFT);
// draw inside update rectangle
LONGLONG SelBegin, SelEnd;
if (pDoc->m_CaretPos <= pDoc->m_SelectionAnchor)
{
SelBegin = pDoc->m_CaretPos & - m_WordSize;
SelEnd = pDoc->m_SelectionAnchor & - m_WordSize;
}
else
{
SelBegin = pDoc->m_SelectionAnchor & - m_WordSize;
SelEnd = pDoc->m_CaretPos & - m_WordSize;
}
int const PaneWidth = GetPaneWidth();
CGdiObjectSave OldPen(pDC, pDC->SelectStockObject(BLACK_PEN));
FileItem::Lock();
for (int CurrentY = ur.top - ur.top % LineHeight(); CurrentY < ur.bottom; CurrentY += LineHeight())
{
LONGLONG CurrentAddr = m_ScreenFilePos + CurrentY / LineHeight() * int(m_BytesPerLine);
if (CurrentAddr > pDoc->GetFileSize())
{
break;
}
TCHAR buf[256];
CRect clip_rect(0, CurrentY, m_AddressMarginWidth-1, CurrentY + LineHeight());
int len = _stprintf_s(buf, countof(buf), _T("%0*I64X "), m_MaxAddressChars, CurrentAddr);
pDC->MoveTo(0, CurrentY);
pDC->SetBkColor(pApp->m_TextColor.Normal.BG);
pDC->SetTextColor(pApp->m_LineNumberTextColor);
pDC->ExtTextOut(0, CurrentY, ETO_CLIPPED|ETO_OPAQUE, clip_rect, buf, len, NULL);
for (int pane = 0; pane < m_NumberOfPanes; pane++)
{
FileItem * pFile;
FileItem * pOtherFile;
CThisApp::NORMAL_OR_SELECTED_COLOR const* OtherColor = &pApp->m_TextColor;
CThisApp::NORMAL_OR_SELECTED_COLOR const* AlternateColor = &pApp->m_TextColor;
if (((1 == m_NumberOfPanes && m_bShowSecondFile)
|| (pane >= 1))
|| !pFilePair->pFirstFile->HasContents())
{
pFile = pFilePair->pSecondFile;
pOtherFile = pFilePair->pFirstFile;
if (!pOtherFile->HasContents())
{
pOtherFile = NULL;
}
OtherColor = &pApp->m_AddedColor;
AlternateColor = &pApp->m_ErasedColor;
}
else
{
pFile = pFilePair->pFirstFile;
pOtherFile = pFilePair->pSecondFile;
OtherColor = &pApp->m_ErasedColor;
AlternateColor = &pApp->m_AddedColor;
}
BYTE data_buf1[128];
BYTE data_buf2[128];
ULONG data_buf1_len = 0;
ULONG data_buf2_len = 0;
if (NULL != pFile)
{
data_buf1_len = pFile->GetFileData(CurrentAddr, &data_buf1, m_BytesPerLine);
}
if (NULL != pOtherFile)
{
data_buf2_len = pOtherFile->GetFileData(CurrentAddr, &data_buf2, m_BytesPerLine);
}
if (data_buf1_len == 0
&& data_buf2_len == 0)
{
break;
}
int PosDrawn = -m_FirstPosSeen;
clip_rect.left = m_AddressMarginWidth + PaneWidth * pane;
clip_rect.right = clip_rect.left + PaneWidth - 1;
if (pane == m_NumberOfPanes - 1)
{
clip_rect.right = cr.right;
}
BufferedDraw buf_draw(pDC, clip_rect, m_FirstPosSeen, CharWidth());
for (unsigned offset = 0;
offset < m_BytesPerLine;
offset += m_WordSize)
{
for (int ByteNum = m_WordSize - 1; ByteNum >= 0; ByteNum--)
{
unsigned ByteOffset = offset + ByteNum;
UCHAR CurrByte = data_buf1[ByteOffset];
CThisApp::NORMAL_OR_SELECTED_COLOR const* Colors = &pApp->m_TextColor;
if (ByteOffset < data_buf1_len)
{
if (NULL != pOtherFile && (ByteOffset >= data_buf2_len
|| CurrByte != data_buf2[ByteOffset]))
{
Colors = OtherColor;
}
}
else if (1 == m_NumberOfPanes
&& NULL != pOtherFile && ByteOffset < data_buf2_len)
{
CurrByte = data_buf2[ByteOffset];
Colors = AlternateColor;
}
else
{
continue;
}
CThisApp::COLOR_PAIR const* color;
if ((1 == m_NumberOfPanes
|| pane == m_PaneWithFocus)
&& ByteOffset + CurrentAddr < SelEnd
&& ByteOffset + CurrentAddr >= SelBegin)
{
color = &Colors->Selected;
}
else
{
color = &Colors->Normal;
}
len = _stprintf_s(buf, countof(buf) - len, _T("%02X"), CurrByte);
buf_draw.Draw(buf, PosDrawn, color->Text, color->BG);
PosDrawn += len;
if (ByteNum == 0
&& offset + m_WordSize < m_BytesPerLine)
{
buf_draw.Draw(_T(" "), PosDrawn, color->Text, color->BG);
PosDrawn++;
}
}
}
PosDrawn += 3;
for (unsigned offset = 0;
offset < m_BytesPerLine;
offset ++)
{
CThisApp::NORMAL_OR_SELECTED_COLOR const* Colors = &pApp->m_TextColor;
UCHAR CurrByte = 0;
if (offset < data_buf1_len)
{
CurrByte = data_buf1[offset];
if (NULL != pOtherFile && (offset >= data_buf2_len
|| CurrByte != data_buf2[offset]))
{
Colors = OtherColor;
}
}
else if (1 == m_NumberOfPanes
&& NULL != pOtherFile && offset < data_buf2_len)
{
CurrByte = data_buf2[offset];
Colors = AlternateColor;
}
else
{
break;
}
CThisApp::COLOR_PAIR const* color;
if ((1 == m_NumberOfPanes
|| pane == m_PaneWithFocus)
&& offset + CurrentAddr < SelEnd
&& offset + CurrentAddr >= SelBegin)
{
color = &Colors->Selected;
}
else
{
color = &Colors->Normal;
}
// convert the byte to unicode
char tmp = CurrByte;
if (!isprint(CurrByte)
|| 1 != mbtowc(buf, &tmp, 1))
{
CurrByte = '.';
}
buf[0] = CurrByte;
buf[1] = 0;
buf_draw.Draw(buf, PosDrawn, color->Text, color->BG);
PosDrawn ++;
}
}
CurrentAddr += m_BytesPerLine;
}
FileItem::Unlock();
for (int pane = 0; pane < m_NumberOfPanes; pane++)
{
int x = m_AddressMarginWidth;
if (pane == 0)
{
x -= CharWidth() / 2;
}
else
{
x += pane * PaneWidth;
}
pDC->MoveTo(x, ur.top);
pDC->LineTo(x, ur.bottom);
}
}
// CBinaryCompareView diagnostics
#ifdef _DEBUG
void CBinaryCompareView::AssertValid() const
{
BaseClass::AssertValid();
}
void CBinaryCompareView::Dump(CDumpContext& dc) const
{
BaseClass::Dump(dc);
}
CBinaryCompareDoc * CBinaryCompareView::GetDocument() // non-debug version is inline
{
ASSERT(m_pDocument->IsKindOf(RUNTIME_CLASS(CBinaryCompareDoc)));
return (CBinaryCompareDoc*)m_pDocument;
}
#endif //_DEBUG
// CBinaryCompareView message handlers
void CBinaryCompareView::OnMetricsChange()
{
TRACE("CBinaryCompareView::OnMetricsChange\n");
// create font
CThisApp * pApp = GetApp();
CWindowDC wdc(this);
CFont * pFont = & pApp->m_NormalFont;
CFont font;
if (pApp->m_NormalLogFont.lfItalic
//|| pApp->m_AddedLogFont.lfItalic
//|| pApp->m_ErasedLogFont.lfItalic
|| pApp->m_NormalLogFont.lfWeight > FW_NORMAL
//|| pApp->m_AddedLogFont.lfWeight > FW_NORMAL
//|| pApp->m_ErasedLogFont.lfWeight > FW_NORMAL
)
{
LOGFONT lf = pApp->m_NormalLogFont;
lf.lfItalic = TRUE;
lf.lfWeight = FW_BLACK;
font.CreateFontIndirect( & lf);
pFont = & font;
}
BinaryFilePair* pFilePair = GetFilePair();
if (pFilePair != nullptr && !pFilePair->CanCompare())
{
m_NumberOfPanes = 1;
}
CRect cr;
GetClientRect( & cr);
CGdiObjectSaveT<CFont> OldFont(wdc, wdc.SelectObject(pFont));
wdc.GetTextMetrics( & m_FontMetric);
CBinaryCompareDoc * pDoc = GetDocument();
LONGLONG FileSize = pDoc->GetFileSize();
if (FileSize >= 0x00FFFFFFFFFFFFFFi64)
{
m_MaxAddressChars = 16;
}
else if (FileSize >= 0x0000FFFFFFFFFFFFi64)
{
m_MaxAddressChars = 14;
}
else if (FileSize >= 0x000000FFFFFFFFFFi64)
{
m_MaxAddressChars = 12;
}
else if (FileSize >= 0x00000000FFFFFFFFi64)
{
m_MaxAddressChars = 10;
}
else
{
m_MaxAddressChars = 8;
}
m_AddressMarginWidth = (m_MaxAddressChars + 1) * CharWidth() + 1;
Invalidate(TRUE);
UpdateVScrollBar();
UpdateHScrollBar();
CreateAndShowCaret();
}
void CBinaryCompareView::CreateAndShowCaret()
{
CBinaryCompareDoc * pDoc = GetDocument();
if (this != GetFocus())
{
//TRACE("CBinaryCompareView::CreateAndShowCaret - No Focus\n");
return;
}
if (0 == GetDocument()->GetFileSize())
{
//TRACE("CBinaryCompareView::CreateAndShowCaret - 0 == GetDocument()->GetFileSize()\n");
return;
}
CPoint p;
int ByteOnTheLine = (ULONG(pDoc->m_CaretPos - m_ScreenFilePos) % m_BytesPerLine)
& -m_WordSize;
int const PaneWidth = GetPaneWidth();
if (m_bCaretOnChars)
{
p.x = (ByteOnTheLine + m_BytesPerLine * 2 + m_BytesPerLine / m_WordSize
+ 2 - m_FirstPosSeen) * CharWidth();
}
else
{
p.x = (ByteOnTheLine * 2 + ByteOnTheLine / m_WordSize
- m_FirstPosSeen) * CharWidth();
}
if (p.x >= 0
&& p.x < PaneWidth - 1
&& pDoc->m_CaretPos >= m_ScreenFilePos
&& pDoc->m_CaretPos <= m_ScreenFilePos + (LinesInView() + 1) * int(m_BytesPerLine))
{
p.x += m_AddressMarginWidth + m_PaneWithFocus * PaneWidth;
p.y = ULONG(pDoc->m_CaretPos - m_ScreenFilePos) / m_BytesPerLine * LineHeight();
CreateSolidCaret(2, LineHeight());
if (0) TRACE("CBinaryCompareView::CreateAndShowCaret %d %d\n", p.x, p.y);
SetCaretPos(p);
ShowCaret();
}
else
{
DestroyCaret();
}
}
void CBinaryCompareView::OnInitialUpdate()
{
BaseClass::OnInitialUpdate();
OnMetricsChange();
}
void CBinaryCompareView::OnWindowCloseDiff()
{
CChildFrame * pFrame = (CChildFrame *)GetParentFrame();
ASSERT_VALID(pFrame);
pFrame->OnClose();
return;
}
BOOL CBinaryCompareView::PreCreateWindow(CREATESTRUCT& cs)
{
cs.style |= WS_VSCROLL | WS_HSCROLL;
return BaseClass::PreCreateWindow(cs);
}
void CBinaryCompareView::OnKeyDown(UINT nChar, UINT nRepCnt, UINT nFlags)
{
CBinaryCompareDoc * pDoc = GetDocument();
bool ShiftPressed = (0 != (0x8000 & GetKeyState(VK_SHIFT)));
bool CtrlPressed = (0 != (0x8000 & GetKeyState(VK_CONTROL)));
int SelectionFlags = SetPositionMakeVisible;
if ( ! ShiftPressed)
{
SelectionFlags |= SetPositionCancelSelection;
}
int nLinesInView = LinesInView();
int nBytesInView = nLinesInView * m_BytesPerLine;
switch (nChar)
{
case VK_DOWN:
TRACE("VK_DOWN\n");
if (CtrlPressed)
{
// do scroll, but leave the cursor inside screen boundary
// if the cursor was outside boundaries, just bring it in
int dy = 0;
if (pDoc->m_CaretPos >= m_ScreenFilePos
&& pDoc->m_CaretPos <= m_ScreenFilePos + nBytesInView)
{
DoVScroll(1);
if (pDoc->m_CaretPos < m_ScreenFilePos)
{
dy = 1;
}
}
MoveCaretBy(0, dy, SelectionFlags);
}
else
{
MoveCaretBy(0, 1, SelectionFlags);
}
break;
case VK_UP:
TRACE("VK_UP\n");
if (CtrlPressed)
{
// do scroll, but leave the cursor inside screen boundary
// if the cursor was outside boundaries, just bring it in
int dy = 0;
if (pDoc->m_CaretPos >= m_ScreenFilePos
&& pDoc->m_CaretPos <= m_ScreenFilePos + nBytesInView)
{
DoVScroll(-1);
if (pDoc->m_CaretPos > m_ScreenFilePos + nBytesInView)
{
dy = -1;
}
}
MoveCaretBy(0, dy, SelectionFlags);
}
else
{
MoveCaretBy(0, -1, SelectionFlags);
}
break;
case VK_LEFT:
TRACE("VK_LEFT\n");
MoveCaretBy(- m_WordSize, 0, SelectionFlags);
break;
case VK_RIGHT:
TRACE("VK_RIGHT\n");
MoveCaretBy(m_WordSize, 0, SelectionFlags);
break;
case VK_HOME:
TRACE("VK_HOME\n");
if (CtrlPressed)
{
SetCaretPosition(0, SelectionFlags);
}
else
{
CaretToHome(SelectionFlags);
}
break;
case VK_END:
TRACE("VK_END\n");
if (CtrlPressed)
{
SetCaretPosition(pDoc->GetFileSize(), SelectionFlags);
}
else
{
CaretToEnd(SelectionFlags);
}
break;
case VK_PRIOR:
TRACE("VK_PRIOR\n");
// do VScroll and move cursor, to keep the cursor at the same line
DoVScroll(-(nLinesInView - 1));
MoveCaretBy(0, -(nLinesInView - 1), SelectionFlags | MoveCaretPositionAlways);
break;
case VK_NEXT:
TRACE("VK_NEXT\n");
// do VScroll and move cursor, to keep the cursor at the same line
DoVScroll(nLinesInView - 1);
MoveCaretBy(0, nLinesInView - 1, SelectionFlags | MoveCaretPositionAlways);
break;
case VK_TAB:
TRACE("VK_TAB\n");
if ( ! m_TrackingSelection)
{
if ( ! m_bCaretOnChars)
{
m_bCaretOnChars = TRUE;
}
else
{
m_bCaretOnChars = FALSE;
// go to next pane
int NewPaneWithFocus = m_PaneWithFocus + 1;
if (NewPaneWithFocus >= m_NumberOfPanes)
{
NewPaneWithFocus = 0;
}
SetFocusPane(NewPaneWithFocus);
}
CreateAndShowCaret();
}
break;
}
BaseClass::OnKeyDown(nChar, nRepCnt, nFlags);
}
void CBinaryCompareView::MoveCaretBy(int dx, int dy, int flags)
{
CBinaryCompareDoc * pDoc = GetDocument();
LONGLONG NewLine = pDoc->m_CaretPos / m_BytesPerLine;
int NewPos = unsigned(pDoc->m_CaretPos) % m_BytesPerLine;
if ((flags & SetPositionCancelSelection)
&& 0 == (flags & MoveCaretPositionAlways))
{
if ((dx < 0 || dy < 0) == (pDoc->m_CaretPos > pDoc->m_SelectionAnchor))
{
NewLine = pDoc->m_SelectionAnchor / m_BytesPerLine;
NewPos = unsigned(pDoc->m_SelectionAnchor) % m_BytesPerLine;
}
if (pDoc->m_CaretPos != pDoc->m_SelectionAnchor)
{
dx = 0;
}
}
NewPos = (NewPos + dx) & -m_WordSize;
SetCaretPosition(NewPos + (NewLine + dy) * m_BytesPerLine, flags);
}
void CBinaryCompareView::OnVScroll(UINT nSBCode, UINT /*nPos*/, CScrollBar* pScrollBar)
{
if (pScrollBar != NULL && pScrollBar->SendChildNotifyLastMsg())
return; // eat it
// ignore scroll bar msgs from other controls
if (pScrollBar != GetScrollBarCtrl(SB_VERT))
return;
// nPos is limited to 16 bits only
SCROLLINFO scrollinfo = { 0 };
GetScrollInfo(SB_VERT, &scrollinfo, SIF_TRACKPOS | SIF_POS);
int nLinesInView = LinesInView();
switch (nSBCode)
{
// not actually generated with standard scrollbar
case SB_TOP:
TRACE("OnVScroll SB_TOP, nPos=%d\n", scrollinfo.nPos);
VScrollToTheAddr(0);
break;
// not actually generated with standard scrollbar
case SB_BOTTOM:
TRACE("OnVScroll SB_BOTTOM, nPos=%d\n", scrollinfo.nPos);
VScrollToTheAddr(GetDocument()->GetFileSize() - nLinesInView * int(m_BytesPerLine));
break;
case SB_LINEUP:
TRACE("OnVScroll SB_LINEUP, nPos=%d\n", scrollinfo.nPos);
DoVScroll( -1);
break;
case SB_LINEDOWN:
TRACE("OnVScroll SB_LINEDOWN, nPos=%d\n", scrollinfo.nPos);
DoVScroll( +1);
break;
case SB_PAGEUP:
TRACE("OnVScroll SB_PAGEUP, nPos=%d\n", scrollinfo.nPos);
DoVScroll( - (nLinesInView - 1));
break;
case SB_PAGEDOWN:
TRACE("OnVScroll SB_PAGEDOWN, nPos=%d\n", scrollinfo.nPos);
DoVScroll( + nLinesInView - 1);
break;
case SB_THUMBTRACK:
TRACE("OnVScroll SB_THUMBTRACK, nPos=%d\n", scrollinfo.nTrackPos);
if (scrollinfo.nTrackPos == m_VScrollInfo.nMax - int(m_VScrollInfo.nPage - 1))
{
// scroll to the end of file
VScrollToTheAddr(GetDocument()->GetFileSize() - nLinesInView * int(m_BytesPerLine));
}
else
{
VScrollToTheAddr(scrollinfo.nTrackPos * m_ScrollDataScale * LONGLONG(m_BytesPerLine));
}
break;
default:
break;
}
}
void CBinaryCompareView::OnHScroll(UINT nSBCode, UINT nPos, CScrollBar* pScrollBar)
{
if (pScrollBar != NULL && pScrollBar->SendChildNotifyLastMsg())
return; // eat it
// ignore scroll bar msgs from other controls
if (pScrollBar != GetScrollBarCtrl(SB_HORZ))
return;
int nCharsInView = CharsInView();
switch (nSBCode)
{
case SB_TOP:
TRACE("OnVScroll SB_TOP, nPos=%d\n", nPos);
HScrollToThePos(0);
break;
case SB_BOTTOM:
TRACE("OnVScroll SB_BOTTOM, nPos=%d\n", nPos);
HScrollToThePos(2048);
break;
case SB_LINEUP:
TRACE("OnVScroll SB_LINEUP, nPos=%d\n", nPos);
DoHScroll( -1);
break;
case SB_LINEDOWN:
TRACE("OnVScroll SB_LINEDOWN, nPos=%d\n", nPos);
DoHScroll( +1);
break;
case SB_PAGEUP:
TRACE("OnVScroll SB_PAGEUP, nPos=%d\n", nPos);
DoHScroll( - (nCharsInView - 1));
break;
case SB_PAGEDOWN:
TRACE("OnVScroll SB_PAGEDOWN, nPos=%d\n", nPos);
DoHScroll( + nCharsInView - 1);
break;
case SB_THUMBTRACK:
TRACE("OnVScroll SB_THUMBTRACK, nPos=%d\n", nPos);
HScrollToThePos(nPos);
break;
default:
break;
}
}
void CBinaryCompareView::DoHScroll(int nCharsToScroll)
{
// > 0 - scroll left (to see chars toward end),
// < 0 - scroll right (to see chars to the begin of the line)
HScrollToThePos(nCharsToScroll + m_FirstPosSeen);
}
void CBinaryCompareView::HScrollToThePos(int nPos)
{
int nCharsInPane = (GetPaneWidth() - 1) / CharWidth();
int CharsToScroll = GetMaxChars() - nCharsInPane;
if (CharsToScroll < 0)
{
CharsToScroll = 0;
}
if (nPos > CharsToScroll)
{
nPos = CharsToScroll;
}
if (nPos < 0)
{
nPos = 0;
}
if (nPos == m_FirstPosSeen)
{
return;
}
// need to scroll the view
CRect cr;
GetClientRect(cr);
CRect ScrollRect(cr);
int PaneWidth = GetPaneWidth();
int ndx = (nPos - m_FirstPosSeen) * CharWidth();
for (int pane = 0; pane < m_NumberOfPanes; pane++)
{
ScrollRect.left = m_AddressMarginWidth + pane * PaneWidth;
if (pane != m_NumberOfPanes - 1)
{
ScrollRect.right = ScrollRect.left + PaneWidth - 1;
}
else
{
ScrollRect.right = cr.right;
}
if (ScrollRect.left < ScrollRect.right)
{
ScrollWindowEx( -ndx, 0, & ScrollRect, & ScrollRect, NULL, NULL,
SW_INVALIDATE | SW_ERASE);
}
}
m_FirstPosSeen = nPos;
UpdateHScrollBar();
CreateAndShowCaret();
}
// > 0 - scroll up (to see lines toward end),
// < 0 - scroll down (to see lines to the begin of the file)
void CBinaryCompareView::DoVScroll(LONGLONG nLinesToScroll)
{
VScrollToTheAddr(m_ScreenFilePos + nLinesToScroll * int(m_BytesPerLine));
}
void CBinaryCompareView::VScrollToTheAddr(LONGLONG Addr)
{
int nLinesInView = LinesInView();
if (Addr < 0)
{
Addr = 0;
}
int BytesPerScreen = nLinesInView * m_BytesPerLine;
LONGLONG FileSize = GetDocument()->GetFileSize();
if (Addr > FileSize - (BytesPerScreen - int(m_BytesPerLine)))
{
Addr = FileSize - (BytesPerScreen - int(m_BytesPerLine));
}
LONGLONG nOffset = Addr - m_ScreenFilePos;