mpz_class evaluatePolynomial(unsigned int x, const std::vector<mpz_class>& coefficients, const mpz_class& p)
{
mpz_class result(0);
mpz_class expX(1);
for (size_t i = 0; i < coefficients.size(); ++i)
{
result = (result + (coefficients[i] * expX) % p) % p;
expX = (expX * x) % p;
}
return result;
}
/*!
* This method is called at the commencement of a visual drag. If the offsets
* to the caret are too big, this method will adjust them and shift the image
* of the dragged text to a comfortable distance fromthe caret.
* Returns true if the offsets are shifted.
* UT_sint32 x pos of the caret
* UT_sint32 y pos of the caret
*/
bool FV_VisualDragText::reposOffsets(UT_sint32 x, UT_sint32 y)
{
UT_sint32 dx = 0;
UT_sint32 dy = 0;
bool bAdjustX = false;
bool bAdjustY = false;
UT_sint32 iext = getGraphics()->tlu(3);
dx = x - m_recCurFrame.left - m_recOrigLeft.width;
dy = y - m_recCurFrame.top;
UT_DEBUGMSG((" repos dx = %d \n",dx));
UT_DEBUGMSG((" repos dy = %d \n",dy));
UT_Rect expX(0,m_recCurFrame.top,0,m_recCurFrame.height);
UT_Rect expY(m_recCurFrame.left,0,m_recCurFrame.width,0);
if(abs(dx) > getGraphics()->tlu(40))
{
bAdjustX = true;
dx -= getGraphics()->tlu(20);
m_iInitialOffX -= dx;
expX.set(0,m_recCurFrame.top,0,m_recCurFrame.height);
m_recCurFrame.left += dx;
m_recOrigLeft.left += dx;
m_recOrigRight.left += dx;
}
if(dy > getGraphics()->tlu(40))
{
bAdjustY = true;
dy -= getGraphics()->tlu(20);
m_iInitialOffY -= dy;
expY.set(m_recCurFrame.left,0,m_recCurFrame.width,0);
m_recCurFrame.top += dy;
m_recOrigLeft.top += dy;
m_recOrigRight.top += dy;
}
if(bAdjustX && dx < 0)
{
expX.left = m_recCurFrame.left+m_recCurFrame.width -iext;
expX.width = -dx + 2*iext;
if(dy > 0)
{
expX.top -= iext;
expX.height += dy + 2*iext;
}
else
{
expX.top -= iext;
expX.height += (-dy + 2*iext);
}
}
else if(bAdjustX)
{
expX.left = m_recCurFrame.left - dx - iext;
expX.width = dx + 2*iext;
if(dy > 0)
{
expX.top -= iext;
expX.height += dy + 2*iext;
}
else
{
expX.top -= iext;
expX.height += (-dy + 2*iext);
}
}
expY.left -= iext;
expY.width += 2*iext;
if(bAdjustY && dy < 0)
{
expY.top = m_recCurFrame.top + m_recCurFrame.height -iext;
expY.height = -dy + 2*iext;
}
else if(bAdjustY)
{
expY.top = m_recCurFrame.top - dy - iext;
expY.height = dy + 2*iext;
}
if(bAdjustX && expX.width > 0)
{
getGraphics()->setClipRect(&expX);
m_pView->updateScreen(false);
}
if(bAdjustY && (expY.height > 0))
{
getGraphics()->setClipRect(&expY);
m_pView->updateScreen(false);
}
if(bAdjustX || bAdjustY)
{
getGraphics()->setClipRect(NULL);
drawImage();
if(m_recOrigLeft.width > 0)
{
getGraphics()->setClipRect(&m_recOrigLeft);
m_pView->updateScreen(false);
}
if(m_recOrigRight.width > 0)
{
getGraphics()->setClipRect(&m_recOrigRight);
m_pView->updateScreen(false);
}
return true;
}
return false;
}
void FV_VisualDragText::_mouseDrag(UT_sint32 x, UT_sint32 y)
{
//
// Don't try to drag the entire document.
//
if(!m_bDoingCopy && (m_pView->isSelectAll() && !m_pView->isHdrFtrEdit())&&(m_iVisualDragMode != FV_VisualDrag_DRAGGING))
{
setMode(FV_VisualDrag_NOT_ACTIVE);
return;
}
if(m_iVisualDragMode == FV_VisualDrag_NOT_ACTIVE)
{
m_iInitialOffX = x;
m_iInitialOffY = y;
m_iVisualDragMode = FV_VisualDrag_WAIT_FOR_MOUSE_DRAG;
UT_DEBUGMSG(("Initial call for drag -1\n"));
return;
}
if((m_iInitialOffX == 0) && (m_iInitialOffY == 0))
{
m_iInitialOffX = x;
m_iInitialOffY = y;
m_iVisualDragMode = FV_VisualDrag_WAIT_FOR_MOUSE_DRAG;
UT_DEBUGMSG(("Initial call for drag -2 \n"));
}
if(m_iVisualDragMode == FV_VisualDrag_WAIT_FOR_MOUSE_DRAG)
{
double diff = sqrt((static_cast<double>(x) - static_cast<double>(m_iInitialOffX))*(static_cast<double>(x) - static_cast<double>(m_iInitialOffX)) +
(static_cast<double>(y) - static_cast<double>(m_iInitialOffY))*(static_cast<double>(y) - static_cast<double>(m_iInitialOffY)));
if(diff < static_cast<double>(getGraphics()->tlu(MIN_DRAG_PIXELS)))
{
UT_DEBUGMSG(("Not yet dragged enough.%f \n", diff));
//
// Have to drag 4 pixels before initiating the drag
//
return;
}
else
{
m_iVisualDragMode = FV_VisualDrag_START_DRAGGING;
XAP_Frame * pFrame = static_cast<XAP_Frame*>(m_pView->getParentData());
if (pFrame)
pFrame->dragText();
}
}
if((m_iVisualDragMode != FV_VisualDrag_DRAGGING) && (m_iVisualDragMode != FV_VisualDrag_WAIT_FOR_MOUSE_DRAG) && !m_bDoingCopy)
{
//
// Haven't started the drag yet so create our image and cut the text.
//
m_pView->getDocument()->beginUserAtomicGlob();
mouseCut(m_iInitialOffX,m_iInitialOffY);
m_bTextCut = true;
}
clearCursor();
if(m_iVisualDragMode == FV_VisualDrag_START_DRAGGING)
{
reposOffsets(x,y);
}
m_iVisualDragMode = FV_VisualDrag_DRAGGING;
xxx_UT_DEBUGMSG(("x = %d y = %d width \n",x,y));
bool bScrollDown = false;
bool bScrollUp = false;
bool bScrollLeft = false;
bool bScrollRight = false;
m_xLastMouse = x;
m_yLastMouse = y;
if(y<=0)
{
bScrollUp = true;
}
else if( y >= m_pView->getWindowHeight())
{
bScrollDown = true;
}
if(x <= 0)
{
bScrollLeft = true;
}
else if(x >= m_pView->getWindowWidth())
{
bScrollRight = true;
}
if(bScrollDown || bScrollUp || bScrollLeft || bScrollRight)
{
if(m_pAutoScrollTimer != NULL)
{
return;
}
m_pAutoScrollTimer = UT_Timer::static_constructor(_autoScroll, this);
m_pAutoScrollTimer->set(AUTO_SCROLL_MSECS);
m_pAutoScrollTimer->start();
return;
}
UT_sint32 dx = 0;
UT_sint32 dy = 0;
UT_Rect expX(0,m_recCurFrame.top,0,m_recCurFrame.height);
UT_Rect expY(m_recCurFrame.left,0,m_recCurFrame.width,0);
UT_sint32 iext = getGraphics()->tlu(3);
dx = x - m_iLastX;
dy = y - m_iLastY;
m_recCurFrame.left += dx;
m_recCurFrame.top += dy;
m_recOrigLeft.left += dx;
m_recOrigLeft.top += dy;
m_recOrigRight.left += dx;
m_recOrigRight.top += dy;
if(dx < 0)
{
expX.left = m_recCurFrame.left+m_recCurFrame.width -iext;
expX.width = -dx + 2*iext;
if(dy > 0)
{
expX.top -= iext;
expX.height += dy + 2*iext;
}
else
{
expX.top -= iext;
expX.height += (-dy + 2*iext);
}
}
else
{
expX.left = m_recCurFrame.left - dx - iext;
expX.width = dx + 2*iext;
if(dy > 0)
{
expX.top -= iext;
expX.height += dy + 2*iext;
}
else
{
expX.top -= iext;
expX.height += (-dy + 2*iext);
}
}
expY.left -= iext;
expY.width += 2*iext;
if(dy < 0)
{
expY.top = m_recCurFrame.top + m_recCurFrame.height -iext;
expY.height = -dy + 2*iext;
}
else
{
expY.top = m_recCurFrame.top - dy - iext;
expY.height = dy + 2*iext;
}
if(!m_bNotDraggingImage && (expX.width > 0))
{
getGraphics()->setClipRect(&expX);
if(m_bSelectedRow)
{
m_pView->setSelectionMode(FV_SelectionMode_NONE);
}
m_pView->updateScreen(false);
if(m_bSelectedRow)
{
m_pView->setSelectionMode(FV_SelectionMode_TableRow);
}
}
if(!m_bNotDraggingImage && (expY.height > 0))
{
xxx_UT_DEBUGMSG(("expY left %d top %d width %d height %d \n",expY.left,expY.top,expY.width,expY.height));
getGraphics()->setClipRect(&expY);
if(m_bSelectedRow)
{
m_pView->setSelectionMode(FV_SelectionMode_NONE);
}
m_pView->updateScreen(false);
if(m_bSelectedRow)
{
m_pView->setSelectionMode(FV_SelectionMode_TableRow);
}
}
if(!m_bNotDraggingImage && (expX.height > 0))
{
xxx_UT_DEBUGMSG(("expY left %d top %d width %d height %d \n",expX.left,expX.top,expX.width,expX.height));
getGraphics()->setClipRect(&expX);
if(m_bSelectedRow)
{
m_pView->setSelectionMode(FV_SelectionMode_NONE);
}
m_pView->updateScreen(false);
if(m_bSelectedRow)
{
m_pView->setSelectionMode(FV_SelectionMode_TableRow);
}
}
if(!m_bNotDraggingImage)
{
getGraphics()->setClipRect(NULL);
drawImage();
if(m_recOrigLeft.width > 0)
{
getGraphics()->setClipRect(&m_recOrigLeft);
m_pView->updateScreen(false);
}
if(m_recOrigRight.width > 0)
{
getGraphics()->setClipRect(&m_recOrigRight);
m_pView->updateScreen(false);
}
}
m_iLastX = x;
m_iLastY = y;
getGraphics()->setClipRect(NULL);
PT_DocPosition posAtXY = getPosFromXY(x,y);
m_pView->_setPoint(posAtXY);
xxx_UT_DEBUGMSG(("Point at visual drag set to %d \n",m_pView->getPoint()));
// m_pView->_fixInsertionPointCoords();
drawCursor(posAtXY);
}
