lyx_mirror/src/cursor.C

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/**
* \file cursor.C
* This file is part of LyX, the document processor.
* Licence details can be found in the file COPYING.
*
* \author Alejandro Aguilar Sierra
* \author Alfredo Braunstein
* \author Andr<EFBFBD> P<EFBFBD>nitz
*
* Full author contact details are available in file CREDITS.
*/
#include <config.h>
#include "BufferView.h"
#include "buffer.h"
#include "cursor.h"
#include "debug.h"
#include "dispatchresult.h"
#include "encoding.h"
#include "funcrequest.h"
#include "iterators.h"
#include "language.h"
#include "lfuns.h"
#include "lyxfont.h"
#include "lyxfunc.h" // only for setMessage()
#include "lyxrc.h"
#include "lyxrow.h"
#include "lyxtext.h"
#include "paragraph.h"
#include "paragraph_funcs.h"
#include "insets/updatableinset.h"
#include "insets/insettabular.h"
#include "insets/insettext.h"
#include "mathed/math_data.h"
#include "mathed/math_support.h"
#include "mathed/math_inset.h"
#include "support/limited_stack.h"
#include "support/std_sstream.h"
#include "frontends/LyXView.h"
#include <boost/assert.hpp>
using std::string;
using std::vector;
using std::endl;
#ifndef CXX_GLOBAL_CSTD
using std::isalpha;
#endif
using std::min;
using std::swap;
// our own cut buffer
limited_stack<string> theCutBuffer;
namespace {
void region(CursorSlice const & i1, CursorSlice const & i2,
LCursor::row_type & r1, LCursor::row_type & r2,
LCursor::col_type & c1, LCursor::col_type & c2)
{
InsetBase & p = i1.inset();
c1 = p.col(i1.idx());
c2 = p.col(i2.idx());
if (c1 > c2)
swap(c1, c2);
r1 = p.row(i1.idx());
r2 = p.row(i2.idx());
if (r1 > r2)
swap(r1, r2);
}
}
LCursor::LCursor(BufferView & bv)
: DocumentIterator(), bv_(&bv), anchor_(),
cached_y_(0), x_target_(-1), selection_(false), mark_(false)
{}
void LCursor::reset(InsetBase & inset)
{
clear();
push_back(CursorSlice(inset));
anchor_.clear();
anchor_.push_back(CursorSlice(inset));
cached_y_ = 0;
clearTargetX();
selection_ = false;
mark_ = false;
}
void LCursor::setCursor(DocumentIterator const & cur, bool sel)
{
// this (intentionally) does not touch the anchor
DocumentIterator::operator=(cur);
selection() = sel;
}
DispatchResult LCursor::dispatch(FuncRequest const & cmd0)
{
if (empty())
return DispatchResult();
//lyxerr << "\nLCursor::dispatch: cmd: " << cmd0 << endl << *this << endl;
FuncRequest cmd = cmd0;
LCursor safe = *this;
for ( ; size(); pop()) {
//lyxerr << "\nLCursor::dispatch: cmd: " << cmd0 << endl << *this << endl;
BOOST_ASSERT(pos() <= lastpos());
BOOST_ASSERT(idx() <= lastidx());
BOOST_ASSERT(par() <= lastpar());
// The common case is 'LFUN handled, need update', so make the
// LFUN handler's life easier by assuming this as default value.
// The handler can reset the update and val flags if necessary.
disp_.update(true);
disp_.dispatched(true);
inset().dispatch(*this, cmd);
if (disp_.dispatched())
break;
}
// it completely to get a 'bomb early' behaviour in case this
// object will be used again.
if (!disp_.dispatched())
operator=(safe);
return disp_;
}
bool LCursor::getStatus(FuncRequest const & cmd, FuncStatus & status)
{
LCursor safe = *this;
for ( ; size(); pop()) {
//lyxerr << "\nLCursor::getStatus: cmd: " << cmd << endl << *this << endl;
BOOST_ASSERT(pos() <= lastpos());
BOOST_ASSERT(idx() <= lastidx());
BOOST_ASSERT(par() <= lastpar());
// The inset's getStatus() will return 'true' if it made
// a definitive decision on whether it want to handle the
// request or not. The result of this decision is put into
// the 'status' parameter.
if (inset().getStatus(*this, cmd, status))
break;
}
operator=(safe);
return true;
}
BufferView & LCursor::bv() const
{
return *bv_;
}
void LCursor::pop()
{
BOOST_ASSERT(size() >= 1);
pop_back();
anchor_.pop_back();
}
void LCursor::push(InsetBase & p)
{
push_back(CursorSlice(p));
}
void LCursor::pushLeft(InsetBase & p)
{
BOOST_ASSERT(!empty());
//lyxerr << "Entering inset " << t << " left" << endl;
push(p);
p.idxFirst(*this);
}
bool LCursor::popLeft()
{
BOOST_ASSERT(!empty());
//lyxerr << "Leaving inset to the left" << endl;
inset().notifyCursorLeaves(idx());
if (depth() == 1)
return false;
pop();
return true;
}
bool LCursor::popRight()
{
BOOST_ASSERT(!empty());
//lyxerr << "Leaving inset to the right" << endl;
inset().notifyCursorLeaves(idx());
if (depth() == 1)
return false;
pop();
++pos();
return true;
}
int LCursor::currentMode()
{
BOOST_ASSERT(!empty());
for (int i = size() - 1; i >= 0; --i) {
int res = operator[](i).inset().currentMode();
if (res != InsetBase::UNDECIDED_MODE)
return res;
}
return InsetBase::TEXT_MODE;
}
void LCursor::updatePos()
{
BOOST_ASSERT(!empty());
if (size() > 1)
cached_y_ = bv().top_y() + back().inset().yo();
//cached_y_ = back().inset().yo();
}
void LCursor::getDim(int & asc, int & des) const
{
if (inMathed()) {
BOOST_ASSERT(inset().asMathInset());
//inset().asMathInset()->getCursorDim(asc, des);
asc = 10;
des = 10;
} else if (inTexted()) {
Row const & row = textRow();
asc = row.baseline();
des = row.height() - asc;
} else {
lyxerr << "should this happen?" << endl;
asc = 10;
des = 10;
}
}
void LCursor::getPos(int & x, int & y) const
{
x = 0;
y = 0;
if (!empty())
inset().getCursorPos(back(), x, y);
// getCursorPos gives _screen_ coordinates. We need to add
// top_y to get document coordinates. This is hidden in cached_y_.
//y += cached_y_ - inset().yo();
// The rest is non-obvious. The reason we have to have these
// extra computation is that the getCursorPos() calls rely
// on the inset's own knowledge of its screen position.
// If we scroll up or down in a big enough increment,
// inset->draw() is not called: this doesn't update
// inset.yo_, so getCursor() returns an old value.
// Ugly as you like.
}
void LCursor::paste(string const & data)
{
dispatch(FuncRequest(LFUN_PASTE, data));
}
void LCursor::resetAnchor()
{
anchor_ = *this;
}
bool LCursor::posLeft()
{
if (pos() == 0)
return false;
--pos();
return true;
}
bool LCursor::posRight()
{
if (pos() == lastpos())
return false;
++pos();
return true;
}
CursorSlice & LCursor::anchor()
{
return anchor_.back();
}
CursorSlice const & LCursor::anchor() const
{
return anchor_.back();
}
CursorSlice const & LCursor::selBegin() const
{
if (!selection())
return back();
return anchor() < back() ? anchor() : back();
}
CursorSlice & LCursor::selBegin()
{
if (!selection())
return back();
// can't use std::min as this returns a const ref
return anchor() < back() ? anchor() : back();
}
CursorSlice const & LCursor::selEnd() const
{
if (!selection())
return back();
return anchor() > back() ? anchor() : back();
}
CursorSlice & LCursor::selEnd()
{
if (!selection())
return back();
// can't use std::min as this returns a const ref
return anchor() > back() ? anchor() : back();
}
void LCursor::setSelection()
{
selection() = true;
// a selection with no contents is not a selection
if (par() == anchor().par() && pos() == anchor().pos())
selection() = false;
}
void LCursor::setSelection(DocumentIterator const & where, size_t n)
{
selection() = true;
setCursor(where, false);
anchor_ = where;
pos() += n;
}
void LCursor::clearSelection()
{
selection() = false;
mark() = false;
resetAnchor();
bv().unsetXSel();
}
int & LCursor::x_target()
{
return x_target_;
}
int LCursor::x_target() const
{
return x_target_;
}
void LCursor::clearTargetX()
{
x_target_ = -1;
}
void LCursor::info(std::ostream & os) const
{
for (int i = 1, n = depth(); i < n; ++i) {
operator[](i).inset().infoize(os);
os << " ";
}
if (pos() != 0)
prevInset()->infoize2(os);
// overwite old message
os << " ";
}
string LCursor::grabSelection()
{
if (!selection())
return string();
CursorSlice i1 = selBegin();
CursorSlice i2 = selEnd();
if (i1.idx() == i2.idx()) {
if (i1.inset().asMathInset()) {
MathArray::const_iterator it = i1.cell().begin();
return asString(MathArray(it + i1.pos(), it + i2.pos()));
} else {
return "unknown selection 1";
}
}
row_type r1, r2;
col_type c1, c2;
region(i1, i2, r1, r2, c1, c2);
string data;
if (i1.inset().asMathInset()) {
for (row_type row = r1; row <= r2; ++row) {
if (row > r1)
data += "\\\\";
for (col_type col = c1; col <= c2; ++col) {
if (col > c1)
data += '&';
data += asString(i1.asMathInset()->cell(i1.asMathInset()->index(row, col)));
}
}
} else {
data = "unknown selection 2";
}
return data;
}
void LCursor::eraseSelection()
{
//lyxerr << "LCursor::eraseSelection" << endl;
CursorSlice const & i1 = selBegin();
CursorSlice const & i2 = selEnd();
#warning FIXME
if (i1.inset().asMathInset()) {
if (i1.idx() == i2.idx()) {
i1.cell().erase(i1.pos(), i2.pos());
} else {
MathInset * p = i1.asMathInset();
row_type r1, r2;
col_type c1, c2;
region(i1, i2, r1, r2, c1, c2);
for (row_type row = r1; row <= r2; ++row)
for (col_type col = c1; col <= c2; ++col)
p->cell(p->index(row, col)).clear();
}
back() = i1;
} else {
lyxerr << "can't erase this selection 1" << endl;
}
//lyxerr << "LCursor::eraseSelection end" << endl;
}
string LCursor::grabAndEraseSelection()
{
if (!selection())
return string();
string res = grabSelection();
eraseSelection();
selection() = false;
return res;
}
void LCursor::selClear()
{
resetAnchor();
clearSelection();
}
void LCursor::selCopy()
{
if (selection()) {
theCutBuffer.push(grabSelection());
selection() = false;
} else {
//theCutBuffer.erase();
}
}
void LCursor::selCut()
{
theCutBuffer.push(grabAndEraseSelection());
}
void LCursor::selDel()
{
//lyxerr << "LCursor::selDel" << endl;
if (selection()) {
eraseSelection();
selection() = false;
}
}
void LCursor::selPaste(size_t n)
{
selClearOrDel();
if (n < theCutBuffer.size())
paste(theCutBuffer[n]);
//grabSelection();
selection() = false;
}
void LCursor::selHandle(bool sel)
{
//lyxerr << "LCursor::selHandle" << endl;
if (sel == selection())
return;
resetAnchor();
selection() = sel;
}
void LCursor::selClearOrDel()
{
//lyxerr << "LCursor::selClearOrDel" << endl;
if (lyxrc.auto_region_delete)
selDel();
else
selection() = false;
}
std::ostream & operator<<(std::ostream & os, LCursor const & cur)
{
for (size_t i = 0, n = cur.size(); i != n; ++i)
os << " " << cur.operator[](i) << " | " << cur.anchor_[i] << "\n";
os << " selection: " << cur.selection_ << endl;
return os;
}
///////////////////////////////////////////////////////////////////
//
// The part below is the non-integrated rest of the original math
// cursor. This should be either generalized for texted or moved
// back to mathed (in most cases to MathNestInset).
//
///////////////////////////////////////////////////////////////////
#include "mathed/math_charinset.h"
#include "mathed/math_factory.h"
#include "mathed/math_gridinset.h"
#include "mathed/math_macroarg.h"
#include "mathed/math_macrotemplate.h"
#include "mathed/math_mathmlstream.h"
#include "mathed/math_scriptinset.h"
#include "mathed/math_support.h"
#include "mathed/math_unknowninset.h"
//#define FILEDEBUG 1
bool LCursor::isInside(InsetBase const * p)
{
for (unsigned i = 0; i < depth(); ++i)
if (&operator[](i).inset() == p)
return true;
return false;
}
bool LCursor::openable(MathAtom const & t) const
{
if (!t->isActive())
return false;
if (t->lock())
return false;
if (!selection())
return true;
// we can't move into anything new during selection
if (depth() == anchor_.size())
return false;
if (!ptr_cmp(t.nucleus(), &anchor_[depth()].inset()))
return false;
return true;
}
bool positionable(DocumentIterator const & cursor,
DocumentIterator const & anchor)
{
// avoid deeper nested insets when selecting
if (cursor.size() > anchor.size())
return false;
// anchor might be deeper, should have same path then
for (size_t i = 0; i < cursor.size(); ++i)
if (&cursor[i].inset() != &anchor[i].inset())
return false;
// position should be ok.
return true;
}
void LCursor::setScreenPos(int x, int y)
{
x_target() = x;
bruteFind(x, y, 0, bv().workWidth(), 0, bv().workHeight());
}
void LCursor::plainErase()
{
cell().erase(pos());
}
void LCursor::markInsert()
{
cell().insert(pos(), MathAtom(new MathCharInset(0)));
}
void LCursor::markErase()
{
cell().erase(pos());
}
void LCursor::plainInsert(MathAtom const & t)
{
cell().insert(pos(), t);
++pos();
}
void LCursor::insert(string const & str)
{
lyxerr << "LCursor::insert str '" << str << "'" << endl;
for (string::const_iterator it = str.begin(); it != str.end(); ++it)
insert(*it);
}
void LCursor::insert(char c)
{
//lyxerr << "LCursor::insert char '" << c << "'" << endl;
BOOST_ASSERT(!empty());
if (inMathed()) {
selClearOrDel();
plainInsert(MathAtom(new MathCharInset(c)));
} else {
text()->insertChar(*this, c);
}
}
void LCursor::insert(MathAtom const & t)
{
//lyxerr << "LCursor::insert MathAtom: " << endl;
macroModeClose();
selClearOrDel();
plainInsert(t);
}
void LCursor::insert(InsetBase * inset)
{
if (inMathed())
insert(MathAtom(inset));
else
text()->insertInset(*this, inset);
}
void LCursor::niceInsert(string const & t)
{
MathArray ar;
asArray(t, ar);
if (ar.size() == 1)
niceInsert(ar[0]);
else
insert(ar);
}
void LCursor::niceInsert(MathAtom const & t)
{
macroModeClose();
string safe = grabAndEraseSelection();
plainInsert(t);
// enter the new inset and move the contents of the selection if possible
if (t->isActive()) {
posLeft();
// be careful here: don't use 'pushLeft(t)' as this we need to
// push the clone, not the original
pushLeft(*nextInset());
paste(safe);
}
}
void LCursor::insert(MathArray const & ar)
{
macroModeClose();
if (selection())
eraseSelection();
cell().insert(pos(), ar);
pos() += ar.size();
}
bool LCursor::backspace()
{
autocorrect() = false;
if (selection()) {
selDel();
return true;
}
if (pos() == 0) {
if (inset().nargs() == 1 && depth() == 1 && lastpos() == 0)
return false;
pullArg();
return true;
}
if (inMacroMode()) {
MathUnknownInset * p = activeMacro();
if (p->name().size() > 1) {
p->setName(p->name().substr(0, p->name().size() - 1));
return true;
}
}
if (pos() != 0 && prevAtom()->nargs() > 0) {
// let's require two backspaces for 'big stuff' and
// highlight on the first
selection() = true;
--pos();
} else {
--pos();
plainErase();
}
return true;
}
bool LCursor::erase()
{
autocorrect() = false;
if (inMacroMode())
return true;
if (selection()) {
selDel();
return true;
}
// delete empty cells if possible
if (pos() == lastpos() && inset().idxDelete(idx()))
return true;
// special behaviour when in last position of cell
if (pos() == lastpos()) {
bool one_cell = inset().nargs() == 1;
if (one_cell && depth() == 1 && lastpos() == 0)
return false;
// remove markup
if (one_cell)
pullArg();
else
inset().idxGlue(idx());
return true;
}
if (pos() != lastpos() && inset().nargs() > 0) {
selection() = true;
++pos();
} else {
plainErase();
}
return true;
}
bool LCursor::up()
{
macroModeClose();
DocumentIterator save = *this;
if (goUpDown(true))
return true;
setCursor(save, false);
autocorrect() = false;
return selection();
}
bool LCursor::down()
{
macroModeClose();
DocumentIterator save = *this;
if (goUpDown(false))
return true;
setCursor(save, false);
autocorrect() = false;
return selection();
}
void LCursor::macroModeClose()
{
if (!inMacroMode())
return;
MathUnknownInset * p = activeMacro();
p->finalize();
string s = p->name();
--pos();
cell().erase(pos());
// do nothing if the macro name is empty
if (s == "\\")
return;
string const name = s.substr(1);
// prevent entering of recursive macros
InsetBase const * macro = innerInsetOfType(InsetBase::MATHMACRO_CODE);
if (macro && macro->getInsetName() == name)
lyxerr << "can't enter recursive macro" << endl;
niceInsert(createMathInset(name));
}
string LCursor::macroName()
{
return inMacroMode() ? activeMacro()->name() : string();
}
void LCursor::handleNest(MathAtom const & a, int c)
{
//lyxerr << "LCursor::handleNest: " << c << endl;
MathAtom t = a;
asArray(grabAndEraseSelection(), t.nucleus()->cell(c));
insert(t);
posLeft();
pushLeft(*nextInset());
}
int LCursor::targetX() const
{
if (x_target() != -1)
return x_target();
int x = 0;
int y = 0;
getPos(x, y);
return x;
}
void LCursor::adjust(pos_type from, int diff)
{
if (pos() > from)
pos() += diff;
if (anchor().pos() > from)
anchor().pos() += diff;
// just to be on the safe side
// theoretically unecessary
normalize();
}
bool LCursor::inMacroMode() const
{
if (!pos() != 0)
return false;
MathUnknownInset const * p = prevAtom()->asUnknownInset();
return p && !p->final();
}
MathUnknownInset * LCursor::activeMacro()
{
return inMacroMode() ? prevAtom().nucleus()->asUnknownInset() : 0;
}
bool LCursor::inMacroArgMode() const
{
return pos() > 0 && prevAtom()->getChar() == '#';
}
MathGridInset * LCursor::enclosingGrid(idx_type & idx) const
{
for (MathInset::difference_type i = depth() - 1; i >= 0; --i) {
MathInset * m = operator[](i).inset().asMathInset();
if (!m)
return 0;
MathGridInset * p = m->asGridInset();
if (p) {
idx = operator[](i).idx();
return p;
}
}
return 0;
}
void LCursor::pullArg()
{
#warning Look here
MathArray ar = cell();
if (popLeft() && inMathed()) {
plainErase();
cell().insert(pos(), ar);
resetAnchor();
} else {
//formula()->mutateToText();
}
}
void LCursor::touch()
{
#warning look here
#if 0
DocumentIterator::const_iterator it = begin();
DocumentIterator::const_iterator et = end();
for ( ; it != et; ++it)
it->cell().touch();
#endif
}
void LCursor::normalize()
{
if (idx() >= nargs()) {
lyxerr << "this should not really happen - 1: "
<< idx() << ' ' << nargs()
<< " in: " << &inset() << endl;
}
idx() = min(idx(), lastidx());
if (pos() > lastpos()) {
lyxerr << "this should not really happen - 2: "
<< pos() << ' ' << lastpos() << " in idx: " << idx()
<< " in atom: '";
WriteStream wi(lyxerr, false, true);
inset().asMathInset()->write(wi);
lyxerr << endl;
}
pos() = min(pos(), lastpos());
}
char LCursor::valign()
{
idx_type idx;
MathGridInset * p = enclosingGrid(idx);
return p ? p->valign() : '\0';
}
char LCursor::halign()
{
idx_type idx;
MathGridInset * p = enclosingGrid(idx);
return p ? p->halign(idx % p->ncols()) : '\0';
}
bool LCursor::goUpDown(bool up)
{
// Be warned: The 'logic' implemented in this function is highly
// fragile. A distance of one pixel or a '<' vs '<=' _really
// matters. So fiddle around with it only if you think you know
// what you are doing!
int xo = 0;
int yo = 0;
getPos(xo, yo);
// check if we had something else in mind, if not, this is the future goal
if (x_target() == -1)
x_target() = xo;
else
xo = x_target();
// try neigbouring script insets
if (!selection()) {
// try left
if (pos() != 0) {
MathScriptInset const * p = prevAtom()->asScriptInset();
if (p && p->has(up)) {
--pos();
push(inset());
idx() = up; // the superscript has index 1
pos() = lastpos();
//lyxerr << "updown: handled by scriptinset to the left" << endl;
return true;
}
}
// try right
if (pos() != lastpos()) {
MathScriptInset const * p = nextAtom()->asScriptInset();
if (p && p->has(up)) {
push(inset());
idx() = up;
pos() = 0;
//lyxerr << "updown: handled by scriptinset to the right" << endl;
return true;
}
}
}
// try current cell for e.g. text insets
if (inset().idxUpDown2(*this, up))
return true;
//xarray().boundingBox(xlow, xhigh, ylow, yhigh);
//if (up)
// yhigh = yo - 4;
//else
// ylow = yo + 4;
//if (bruteFind(xo, yo, xlow, xhigh, ylow, yhigh)) {
// lyxerr << "updown: handled by brute find in the same cell" << endl;
// return true;
//}
// try to find an inset that knows better then we
while (1) {
//lyxerr << "updown: We are in " << &inset() << " idx: " << idx() << endl;
// ask inset first
if (inset().idxUpDown(*this, up)) {
// try to find best position within this inset
if (!selection())
bruteFind2(xo, yo);
return true;
}
// no such inset found, just take something "above"
//lyxerr << "updown: handled by strange case" << endl;
if (!popLeft()) {
int ylow = up ? 0 : yo + 1;
int yhigh = up ? yo - 1 : bv().workHeight();
return bruteFind(xo, yo, 0, bv().workWidth(), ylow, yhigh);
}
// any improvement so far?
int xnew, ynew;
getPos(xnew, ynew);
if (up ? ynew < yo : ynew > yo)
return true;
}
}
bool LCursor::bruteFind(int x, int y, int xlow, int xhigh, int ylow, int yhigh)
{
BOOST_ASSERT(!empty());
ParagraphList::iterator beg;
ParagraphList::iterator end;
CursorSlice bottom = operator[](0);
LyXText * text = bottom.text();
BOOST_ASSERT(text);
getParsInRange(text->paragraphs(), ylow, yhigh, beg, end);
DocumentIterator it(bv().buffer()->inset());
DocumentIterator et;
lyxerr << "x: " << x << " y: " << y << endl;
lyxerr << "xlow: " << xlow << " ylow: " << ylow << endl;
lyxerr << "xhigh: " << xhigh << " yhigh: " << yhigh << endl;
it.par() = text->parOffset(beg);
//et.par() = text->parOffset(end);
double best_dist = 10e10;
DocumentIterator best_cursor = it;
for ( ; it != et; it.forwardPos()) {
// avoid invalid nesting when selecting
if (!selection() || positionable(it, anchor_)) {
int xo = 0, yo = 0;
CursorSlice & cur = it.back();
cur.inset().getCursorPos(cur, xo, yo);
if (xlow <= xo && xo <= xhigh && ylow <= yo && yo <= yhigh) {
double d = (x - xo) * (x - xo) + (y - yo) * (y - yo);
lyxerr << "xo: " << xo << " yo: " << yo << " d: " << d << endl;
// '<=' in order to take the last possible position
// this is important for clicking behind \sum in e.g. '\sum_i a'
if (d <= best_dist) {
lyxerr << "*" << endl;
best_dist = d;
best_cursor = it;
}
}
}
}
lyxerr << "best_dist: " << best_dist << " cur:\n" << best_cursor << endl;
if (best_dist < 1e10)
setCursor(best_cursor, false);
return best_dist < 1e10;
}
void LCursor::bruteFind2(int x, int y)
{
double best_dist = 1e10;
DocumentIterator it = *this;
it.back().pos() = 0;
DocumentIterator et = *this;
et.back().pos() = et.back().asMathInset()->cell(et.back().idx()).size();
for (int i = 0; ; ++i) {
int xo, yo;
CursorSlice & cur = it.back();
cur.inset().getCursorPos(cur, xo, yo);
double d = (x - xo) * (x - xo) + (y - yo) * (y - yo);
// '<=' in order to take the last possible position
// this is important for clicking behind \sum in e.g. '\sum_i a'
lyxerr << "i: " << i << " d: " << d << " best: " << best_dist << endl;
if (d <= best_dist) {
best_dist = d;
setCursor(it, false);
}
if (it == et)
break;
it.forwardPos();
}
}
CursorSlice LCursor::normalAnchor()
{
if (anchor_.size() < depth()) {
resetAnchor();
lyxerr << "unusual Anchor size" << endl;
}
//lyx::BOOST_ASSERT(Anchor_.size() >= cursor.depth());
// use Anchor on the same level as Cursor
CursorSlice normal = anchor_[size() - 1];
#if 0
if (depth() < anchor_.size() && !(normal < xx())) {
// anchor is behind cursor -> move anchor behind the inset
++normal.pos_;
}
#endif
return normal;
}
void LCursor::handleFont(string const & font)
{
lyxerr << "LCursor::handleFont: " << font << endl;
string safe;
if (selection()) {
macroModeClose();
safe = grabAndEraseSelection();
}
if (lastpos() != 0) {
// something left in the cell
if (pos() == 0) {
// cursor in first position
popLeft();
} else if (pos() == lastpos()) {
// cursor in last position
popRight();
} else {
// cursor in between. split cell
MathArray::iterator bt = cell().begin();
MathAtom at = createMathInset(font);
at.nucleus()->cell(0) = MathArray(bt, bt + pos());
cell().erase(bt, bt + pos());
popLeft();
plainInsert(at);
}
} else {
// nothing left in the cell
pullArg();
plainErase();
}
insert(safe);
}
void LCursor::message(string const & msg) const
{
bv().owner()->getLyXFunc().setMessage(msg);
}
void LCursor::errorMessage(string const & msg) const
{
bv().owner()->getLyXFunc().setErrorMessage(msg);
}
string LCursor::selectionAsString(bool label) const
{
if (!selection())
return string();
if (inTexted()) {
Buffer const & buffer = *bv().buffer();
// should be const ...
ParagraphList::iterator startpit = text()->getPar(selBegin());
ParagraphList::iterator endpit = text()->getPar(selEnd());
size_t const startpos = selBegin().pos();
size_t const endpos = selEnd().pos();
if (startpit == endpit)
return startpit->asString(buffer, startpos, endpos, label);
// First paragraph in selection
string result =
startpit->asString(buffer, startpos, startpit->size(), label) + "\n\n";
// The paragraphs in between (if any)
ParagraphList::iterator pit = startpit;
for (++pit; pit != endpit; ++pit)
result += pit->asString(buffer, 0, pit->size(), label) + "\n\n";
// Last paragraph in selection
result += endpit->asString(buffer, 0, endpos, label);
return result;
}
#warning and mathed?
return string();
}
string LCursor::currentState()
{
if (inMathed()) {
std::ostringstream os;
info(os);
return os.str();
}
if (inTexted())
return text()->currentState(*this);
return string();
}
// only used by the spellchecker
void LCursor::replaceWord(string const & replacestring)
{
LyXText * t = text();
BOOST_ASSERT(t);
t->replaceSelectionWithString(*this, replacestring);
t->setSelectionRange(*this, replacestring.length());
// Go back so that replacement string is also spellchecked
for (string::size_type i = 0; i < replacestring.length() + 1; ++i)
t->cursorLeft(*this);
}
void LCursor::update()
{
bv().update();
}
string LCursor::getPossibleLabel()
{
return inMathed() ? "eq:" : text()->getPossibleLabel(*this);
}
Encoding const * LCursor::getEncoding() const
{
if (empty())
return 0;
if (!bv().buffer())
return 0;
int s = 0;
// go up until first non-0 text is hit
// (innermost text is 0 in mathed)
for (s = size() - 1; s >= 0; --s)
if (operator[](s).text())
break;
CursorSlice const & sl = operator[](s);
LyXText & text = *sl.text();
ParagraphList::iterator pit = text.getPar(sl.par());
LyXFont font = pit->getFont(
bv().buffer()->params(), sl.pos(), outerFont(pit, text.paragraphs()));
return font.language()->encoding();
}
void LCursor::undispatched()
{
disp_.dispatched(false);
}
void LCursor::noUpdate()
{
disp_.update(false);
}