BOOL TextView::BackDelete()
{
ULONG selstart = min(m_nSelectionStart, m_nSelectionEnd);
ULONG selend = max(m_nSelectionStart, m_nSelectionEnd);
// if there's a selection then delete it
if(selstart != selend)
{
m_pTextDoc->erase_text(selstart, selend-selstart);
m_nCursorOffset = selstart;
m_pTextDoc->m_seq.breakopt();
}
// otherwise do a back-delete
else if(m_nCursorOffset > 0)
{
//m_nCursorOffset--;
ULONG oldpos = m_nCursorOffset;
MoveCharPrev();
//m_pTextDoc->erase_text(m_nCursorOffset, 1);
m_pTextDoc->erase_text(m_nCursorOffset, oldpos - m_nCursorOffset);
}
m_nSelectionStart = m_nCursorOffset;
m_nSelectionEnd = m_nCursorOffset;
ResetLineCache();
RefreshWindow();
Smeg(FALSE);
return TRUE;
}
//
// Process keyboard-navigation keys
//
LONG TextViewBase::OnKeyDown(UINT nKeyCode, UINT nFlags)
{
bool fCtrlDown = IsKeyPressed(VK_CONTROL);
bool fShiftDown = IsKeyPressed(VK_SHIFT);
BOOL fAdvancing = FALSE;
long oldCursorOffset = m_nSelectionEnd;
//
// Process the key-press. Cursor movement is different depending
// on if <ctrl> is held down or not, so act accordingly
//
switch(nKeyCode)
{
case VK_SHIFT: case VK_CONTROL:
return 0;
case 'a': case 'A':
{
if(fCtrlDown)
SelectAll();
}
return 0;
// CTRL+Z undo
case 'z': case 'Z':
if(fCtrlDown && Undo())
/*NotifyParent(TVN_CHANGED);*/
return 0;
// CTRL+Y redo
case 'y': case 'Y':
if(fCtrlDown && Redo())
//NotifyParent(TVN_CHANGED);
return 0;
// CTRL+C copy
case 'c': case 'C':
{
//if(fCtrlDown && Redo())
// NotifyParent(TVN_CHANGED);
if(fCtrlDown)
return OnCopy();
else
break;
}
case 'x': case 'X':
{
if(fCtrlDown)
return OnCut();
else
break;
}
case 'v': case 'V':
{
if(fCtrlDown)
return OnPaste();
else
break;
}
// Change insert mode / clipboard copy&paste
case VK_INSERT:
if(fCtrlDown)
{
OnCopy();
NotifyParent(TVN_CHANGED);
}
else if(fShiftDown)
{
OnPaste();
NotifyParent(TVN_CHANGED);
}
else
{
if(m_nEditMode == MODE_INSERT)
m_nEditMode = MODE_OVERWRITE;
else if(m_nEditMode == MODE_OVERWRITE)
m_nEditMode = MODE_INSERT;
NotifyParent(TVN_EDITMODE_CHANGE);
}
return 0;
case VK_DELETE:
if(m_nEditMode != MODE_READONLY)
{
if(fShiftDown)
OnCut();
else
ForwardDelete();
NotifyParent(TVN_CHANGED);
}
return 0;
case VK_BACK:
if(m_nEditMode != MODE_READONLY)
{
BackDelete();
fAdvancing = FALSE;
NotifyParent(TVN_CHANGED);
}
return 0;
case VK_LEFT:
if(fCtrlDown) MoveWordPrev();
else MoveCharPrev();
fAdvancing = FALSE;
break;
case VK_RIGHT:
if(fCtrlDown) MoveWordNext();
else MoveCharNext();
fAdvancing = TRUE;
break;
case VK_UP:
if(fCtrlDown) Scroll(0, -1);
else MoveLineUp(1);
break;
case VK_DOWN:
if(fCtrlDown) Scroll(0, 1);
else MoveLineDown(1);
break;
case VK_PRIOR:
if(!fCtrlDown) MovePageUp();
break;
case VK_NEXT:
if(!fCtrlDown) MovePageDown();
break;
case VK_HOME:
if(fCtrlDown) MoveFileStart();
else MoveLineStart(m_nCurrentLine);
break;
case VK_END:
if(fCtrlDown) MoveFileEnd();
else MoveLineEnd(m_nCurrentLine);
break;
default:
return 0;
}
// Extend selection if <shift> is down
if(fShiftDown)
{
InvalidateRange(m_nSelectionEnd, oldCursorOffset);
//m_nSelectionEnd = m_nCursorOffset;
}
// Otherwise clear the selection
else
{
if(m_nSelectionStart != m_nSelectionEnd)
InvalidateRange(m_nSelectionStart, m_nSelectionEnd);
//m_nSelectionEnd = m_nCursorOffset;
m_nSelectionStart = m_nSelectionEnd;
}
// update caret-location (xpos, line#) from the offset
//UpdateCaretOffset(m_nCursorOffset, fAdvancing, &m_nCaretPosX, &m_nCurrentLine);
CHAR_POS cp;
FilePosToCharPos(m_nSelectionEnd, &cp);
m_nCurrentLine_D = cp.logLine;
// maintain the caret 'anchor' position *except* for up/down actions
if(nKeyCode != VK_UP && nKeyCode != VK_DOWN)
{
//m_nAnchorPosX = m_nCaretPosX;
// scroll as necessary to keep caret within viewport
//ScrollToPosition(m_nCaretPosX, m_nCurrentLine);
}
else
{
// scroll as necessary to keep caret within viewport
if(!fCtrlDown);
//ScrollToPosition(m_nCaretPosX, m_nCurrentLine);
}
NotifyParent(TVN_CURSOR_CHANGE);
return 0;
}
BOOL TextViewBase::BackDelete()
{
ULONG selstart = min(m_nSelectionStart, m_nSelectionEnd);
ULONG selend = max(m_nSelectionStart, m_nSelectionEnd);
ULONG length = selend - selstart;
bool nead_Smeg = false;
ULONG line_offset, line_length, line_no;
m_pTextDoc->lineinfo_from_offset(selstart, &line_no, &line_offset, &line_length, NULL, NULL);
//m_pTextDoc->lineinfo_from_lineno(m_nCurrentLine_D, &line_offset, &line_length, NULL, NULL);
// if there's a selection then delete it
if(selstart != selend)
{
if(selstart + length >= line_length + line_offset)
{
nead_Smeg = true;
}
m_pTextDoc->erase_text(selstart, selend-selstart);
m_nSelectionEnd = selstart;
m_pTextDoc->m_seq.breakopt();
}
// otherwise do a back-delete
else if (m_nSelectionEnd > 0)
{
//m_nCursorOffset--;
ULONG oldpos = m_nSelectionEnd;
MoveCharPrev();
length = oldpos - m_nSelectionEnd;
if (m_nSelectionEnd < line_offset)
{
nead_Smeg = true;
}
m_pTextDoc->erase_text(m_nSelectionEnd, length);
}
m_nSelectionStart = m_nSelectionEnd;
//m_nSelectionEnd = m_nCursorOffset;
//FilePosToCharPos(m_nCursorOffset, &m_CurrentCharPos);
if(nead_Smeg)
{
Smeg(FALSE);
}else
{
int old_offset = m_nSelectionEnd;
m_pTextDoc->init_linebuffer();
ResetLineCache( m_nCurrentLine_D);
//FilePosToCharPos(m_nCursorOffset, &m_CurrentCharPos);
MoveLineStart(0, false);
InvalidateRange((m_nSelectionEnd ? m_nSelectionEnd - 1 : 0), line_offset + line_length);
m_nSelectionEnd = old_offset;
RepositionCaret();
}
#ifdef _DEBUG
wchar_t db_string[200];
wsprintf(db_string, L"m_nSelectionEnd=%d\n", m_nSelectionEnd);
OutputDebugString(db_string);
#endif
return TRUE;
}