lyx_mirror/src/cursor.C
Abdelrazak Younes 4cc7a7708e This commit fixes a crash when accessing a math inset. This was due to an invalid CursorSlice::text() null pointer accessed in InsetMathNest::cursorPos():
CoordCache & coord_cache = sl.text()->bv()->coordCache();

As you can see, I used this indirection to access the BufferView::CoordCache(). Bad luck, the passed CursorSlice was not completely valid inside a mathed inset, hence the crash. My solution is to pass BufferView to InsetBase::cursorPos() and all its derivative.

* InsetBase::cursorPos(): pass BufferView const &

* bufferview_funcs::coordOffset(): ditto.




git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@15356 a592a061-630c-0410-9148-cb99ea01b6c8
2006-10-17 16:23:27 +00:00

1285 lines
26 KiB
C

/**
* \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 André Pönitz
*
* Full author contact details are available in file CREDITS.
*/
#include <config.h>
#include "BufferView.h"
#include "buffer.h"
#include "cursor.h"
#include "coordcache.h"
#include "CutAndPaste.h"
#include "debug.h"
#include "dispatchresult.h"
#include "encoding.h"
#include "funcrequest.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 "pariterator.h"
#include "insets/insettabular.h"
#include "insets/insettext.h"
#include "mathed/MathData.h"
#include "mathed/InsetMath.h"
#include "mathed/InsetMathScript.h"
#include "mathed/MathMacroTable.h"
#include "mathed/MathParser.h"
#include "support/limited_stack.h"
#include <boost/assert.hpp>
#include <boost/bind.hpp>
#include <boost/current_function.hpp>
#include <sstream>
#include <limits>
using lyx::char_type;
using lyx::CoordCache;
using lyx::docstring;
using lyx::pit_type;
using lyx::Point;
using std::string;
using std::vector;
using std::endl;
#ifndef CXX_GLOBAL_CSTD
using std::isalpha;
#endif
using std::min;
using std::for_each;
namespace {
bool
positionable(DocIterator const & cursor, DocIterator const & anchor)
{
// avoid deeper nested insets when selecting
if (cursor.depth() > anchor.depth())
return false;
// anchor might be deeper, should have same path then
for (size_t i = 0; i < cursor.depth(); ++i)
if (&cursor[i].inset() != &anchor[i].inset())
return false;
// position should be ok.
return true;
}
// Find position closest to (x, y) in cell given by iter.
// Used only in mathed
DocIterator bruteFind2(LCursor const & c, int x, int y)
{
double best_dist = std::numeric_limits<double>::max();
DocIterator result;
DocIterator it = c;
it.top().pos() = 0;
DocIterator et = c;
et.top().pos() = et.top().asInsetMath()->cell(et.top().idx()).size();
for (size_t i = 0; ; ++i) {
int xo;
int yo;
InsetBase const * inset = &it.inset();
Point o = c.bv().coordCache().getInsets().xy(inset);
inset->cursorPos(c.bv(), it.top(), c.boundary(), xo, yo);
// Convert to absolute
xo += o.x_;
yo += o.y_;
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[Debug::DEBUG] << "i: " << i << " d: " << d
<< " best: " << best_dist << endl;
if (d <= best_dist) {
best_dist = d;
result = it;
}
if (it == et)
break;
it.forwardPos();
}
return result;
}
/// moves position closest to (x, y) in given box
bool bruteFind(LCursor & cursor,
int x, int y, int xlow, int xhigh, int ylow, int yhigh)
{
BOOST_ASSERT(!cursor.empty());
InsetBase & inset = cursor[0].inset();
BufferView & bv = cursor.bv();
CoordCache::InnerParPosCache const & cache =
bv.coordCache().getParPos().find(cursor.bottom().text())->second;
// Get an iterator on the first paragraph in the cache
DocIterator it(inset);
it.push_back(CursorSlice(inset));
it.pit() = cache.begin()->first;
// Get an iterator after the last paragraph in the cache
DocIterator et(inset);
et.push_back(CursorSlice(inset));
et.pit() = boost::prior(cache.end())->first;
if (et.pit() >= et.lastpit())
et = doc_iterator_end(inset);
else
++et.pit();
double best_dist = std::numeric_limits<double>::max();;
DocIterator best_cursor = et;
for ( ; it != et; it.forwardPos(true)) {
// avoid invalid nesting when selecting
if (!cursor.selection() || positionable(it, cursor.anchor_)) {
Point p = bv_funcs::getPos(bv, it, false);
int xo = p.x_;
int yo = p.y_;
if (xlow <= xo && xo <= xhigh && ylow <= yo && yo <= yhigh) {
double const dx = xo - x;
double const dy = yo - y;
double const d = dx * dx + dy * dy;
// '<=' 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;
}
}
}
}
if (best_cursor != et) {
cursor.setCursor(best_cursor);
return true;
}
return false;
}
/// moves position closest to (x, y) in given box
bool bruteFind3(LCursor & cur, int x, int y, bool up)
{
BufferView & bv = cur.bv();
int ylow = up ? 0 : y + 1;
int yhigh = up ? y - 1 : bv.workHeight();
int xlow = 0;
int xhigh = bv.workWidth();
// FIXME: bit more work needed to get 'from' and 'to' right.
pit_type from = cur.bottom().pit();
//pit_type to = cur.bottom().pit();
//lyxerr << "Pit start: " << from << endl;
//lyxerr << "bruteFind3: x: " << x << " y: " << y
// << " xlow: " << xlow << " xhigh: " << xhigh
// << " ylow: " << ylow << " yhigh: " << yhigh
// << endl;
InsetBase & inset = bv.buffer()->inset();
DocIterator it = doc_iterator_begin(inset);
it.pit() = from;
DocIterator et = doc_iterator_end(inset);
double best_dist = std::numeric_limits<double>::max();
DocIterator best_cursor = et;
for ( ; it != et; it.forwardPos()) {
// avoid invalid nesting when selecting
if (bv_funcs::status(&bv, it) == bv_funcs::CUR_INSIDE
&& (!cur.selection() || positionable(it, cur.anchor_))) {
Point p = bv_funcs::getPos(bv, it, false);
int xo = p.x_;
int yo = p.y_;
if (xlow <= xo && xo <= xhigh && ylow <= yo && yo <= yhigh) {
double const dx = xo - x;
double const dy = yo - y;
double const d = dx * dx + dy * dy;
//lyxerr << "itx: " << xo << " ity: " << yo << " d: " << d
// << " dx: " << dx << " dy: " << dy
// << " idx: " << it.idx() << " pos: " << it.pos()
// << " it:\n" << it
// << 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_cursor == et)
return false;
cur.setCursor(best_cursor);
return true;
}
} // namespace anon
// be careful: this is called from the bv's constructor, too, so
// bv functions are not yet available!
LCursor::LCursor(BufferView & bv)
: DocIterator(), bv_(&bv), anchor_(), x_target_(-1),
selection_(false), mark_(false), logicalpos_(false)
{}
void LCursor::reset(InsetBase & inset)
{
clear();
push_back(CursorSlice(inset));
anchor_ = DocIterator(inset);
clearTargetX();
selection_ = false;
mark_ = false;
}
// this (intentionally) does neither touch anchor nor selection status
void LCursor::setCursor(DocIterator const & cur)
{
DocIterator::operator=(cur);
}
void LCursor::dispatch(FuncRequest const & cmd0)
{
lyxerr[Debug::DEBUG] << BOOST_CURRENT_FUNCTION
<< " cmd: " << cmd0 << '\n'
<< *this << endl;
if (empty())
return;
fixIfBroken();
FuncRequest cmd = cmd0;
LCursor safe = *this;
for (; depth(); pop()) {
lyxerr[Debug::DEBUG] << "LCursor::dispatch: cmd: "
<< cmd0 << endl << *this << endl;
BOOST_ASSERT(pos() <= lastpos());
BOOST_ASSERT(idx() <= lastidx());
BOOST_ASSERT(pit() <= lastpit());
// 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()) {
lyxerr[Debug::DEBUG] << "RESTORING OLD CURSOR!" << endl;
operator=(safe);
disp_.dispatched(false);
}
}
DispatchResult LCursor::result() const
{
return disp_;
}
BufferView & LCursor::bv() const
{
BOOST_ASSERT(bv_);
return *bv_;
}
Buffer & LCursor::buffer() const
{
BOOST_ASSERT(bv_);
BOOST_ASSERT(bv_->buffer());
return *bv_->buffer();
}
void LCursor::pop()
{
BOOST_ASSERT(depth() >= 1);
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(*this);
if (depth() == 1)
return false;
pop();
return true;
}
bool LCursor::popRight()
{
BOOST_ASSERT(!empty());
//lyxerr << "Leaving inset to the right" << endl;
inset().notifyCursorLeaves(*this);
if (depth() == 1)
return false;
pop();
++pos();
return true;
}
int LCursor::currentMode()
{
BOOST_ASSERT(!empty());
for (int i = depth() - 1; i >= 0; --i) {
int res = operator[](i).inset().currentMode();
if (res != InsetBase::UNDECIDED_MODE)
return res;
}
return InsetBase::TEXT_MODE;
}
void LCursor::getPos(int & x, int & y) const
{
Point p = bv_funcs::getPos(bv(), *this, boundary());
x = p.x_;
y = p.y_;
}
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() const
{
BOOST_ASSERT(anchor_.depth() >= depth());
CursorSlice normal = anchor_[depth() - 1];
if (depth() < anchor_.depth() && top() <= normal) {
// anchor is behind cursor -> move anchor behind the inset
++normal.pos();
}
return normal;
}
CursorSlice LCursor::selBegin() const
{
if (!selection())
return top();
return anchor() < top() ? anchor() : top();
}
CursorSlice LCursor::selEnd() const
{
if (!selection())
return top();
return anchor() > top() ? anchor() : top();
}
DocIterator LCursor::selectionBegin() const
{
if (!selection())
return *this;
DocIterator di = (anchor() < top() ? anchor_ : *this);
di.resize(depth());
return di;
}
DocIterator LCursor::selectionEnd() const
{
if (!selection())
return *this;
DocIterator di = (anchor() > top() ? anchor_ : *this);
if (di.depth() > depth()) {
di.resize(depth());
++di.pos();
}
return di;
}
void LCursor::setSelection()
{
selection() = true;
// A selection with no contents is not a selection
#ifdef WITH_WARNINGS
#warning doesnt look ok
#endif
if (pit() == anchor().pit() && pos() == anchor().pos())
selection() = false;
}
void LCursor::setSelection(DocIterator const & where, size_t n)
{
setCursor(where);
selection() = true;
anchor_ = where;
pos() += n;
}
void LCursor::clearSelection()
{
selection() = false;
mark() = false;
resetAnchor();
}
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 << " ";
}
void LCursor::selHandle(bool sel)
{
//lyxerr << "LCursor::selHandle" << endl;
if (sel == selection())
return;
resetAnchor();
selection() = sel;
}
std::ostream & operator<<(std::ostream & os, LCursor const & cur)
{
os << "\n cursor: | anchor:\n";
for (size_t i = 0, n = cur.depth(); i != n; ++i) {
os << " " << cur[i] << " | ";
if (i < cur.anchor_.depth())
os << cur.anchor_[i];
else
os << "-------------------------------";
os << "\n";
}
for (size_t i = cur.depth(), n = cur.anchor_.depth(); i < n; ++i) {
os << "------------------------------- | " << cur.anchor_[i] << "\n";
}
os << " selection: " << cur.selection_
<< " x_target: " << cur.x_target_ << 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 InsetMathNest).
//
///////////////////////////////////////////////////////////////////
#include "mathed/InsetMathChar.h"
#include "mathed/MathFactory.h"
#include "mathed/InsetMathGrid.h"
#include "mathed/MathMacroArgument.h"
#include "mathed/MathMLStream.h"
#include "mathed/InsetMathScript.h"
#include "mathed/MathSupport.h"
#include "mathed/InsetMathUnknown.h"
//#define FILEDEBUG 1
bool LCursor::isInside(InsetBase const * p)
{
for (size_t i = 0; i != depth(); ++i)
if (&operator[](i).inset() == p)
return true;
return false;
}
void LCursor::leaveInset(InsetBase const & inset)
{
for (size_t i = 0; i != depth(); ++i) {
if (&operator[](i).inset() == &inset) {
resize(i);
return;
}
}
}
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_.depth())
return false;
if (!ptr_cmp(t.nucleus(), &anchor_[depth()].inset()))
return false;
return true;
}
void LCursor::setScreenPos(int x, int y)
{
x_target() = x;
bruteFind(*this, x, y, 0, bv().workWidth(), 0, bv().workHeight());
}
void LCursor::plainErase()
{
cell().erase(pos());
}
void LCursor::markInsert()
{
insert(char_type(0));
}
void LCursor::markErase()
{
cell().erase(pos());
}
void LCursor::plainInsert(MathAtom const & t)
{
cell().insert(pos(), t);
++pos();
}
void LCursor::insert(string const & str)
{
for_each(str.begin(), str.end(),
boost::bind(static_cast<void(LCursor::*)(char_type)>
(&LCursor::insert), this, _1));
}
void LCursor::insert(char_type c)
{
//lyxerr << "LCursor::insert char '" << c << "'" << endl;
BOOST_ASSERT(!empty());
if (inMathed()) {
lyx::cap::selClearOrDel(*this);
insert(new InsetMathChar(c));
} else {
text()->insertChar(*this, c);
}
}
void LCursor::insert(MathAtom const & t)
{
//lyxerr << "LCursor::insert MathAtom '" << t << "'" << endl;
macroModeClose();
lyx::cap::selClearOrDel(*this);
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;
// FIXME UNICODE
asArray(lyx::from_utf8(t), ar);
if (ar.size() == 1)
niceInsert(ar[0]);
else
insert(ar);
}
void LCursor::niceInsert(MathAtom const & t)
{
macroModeClose();
string const safe = lyx::cap::grabAndEraseSelection(*this);
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());
// We may not use niceInsert here (recursion)
MathArray ar;
// FIXME UNICODE
asArray(lyx::from_utf8(safe), ar);
insert(ar);
}
}
void LCursor::insert(MathArray const & ar)
{
macroModeClose();
if (selection())
lyx::cap::eraseSelection(*this);
cell().insert(pos(), ar);
pos() += ar.size();
}
bool LCursor::backspace()
{
autocorrect() = false;
if (selection()) {
lyx::cap::selDel(*this);
return true;
}
if (pos() == 0) {
if (inset().nargs() == 1 && depth() == 1 && lastpos() == 0)
return false;
pullArg();
return true;
}
if (inMacroMode()) {
InsetMathUnknown * 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
resetAnchor();
selection() = true;
--pos();
} else {
--pos();
plainErase();
}
return true;
}
bool LCursor::erase()
{
autocorrect() = false;
if (inMacroMode())
return true;
if (selection()) {
lyx::cap::selDel(*this);
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;
}
// 'clever' UI hack: only erase large items if previously slected
if (pos() != lastpos() && nextAtom()->nargs() > 0) {
resetAnchor();
selection() = true;
++pos();
} else {
plainErase();
}
return true;
}
bool LCursor::up()
{
macroModeClose();
DocIterator save = *this;
if (goUpDown(true))
return true;
setCursor(save);
autocorrect() = false;
return selection();
}
bool LCursor::down()
{
macroModeClose();
DocIterator save = *this;
if (goUpDown(false))
return true;
setCursor(save);
autocorrect() = false;
return selection();
}
bool LCursor::macroModeClose()
{
if (!inMacroMode())
return false;
InsetMathUnknown * p = activeMacro();
p->finalize();
string const s = p->name();
--pos();
cell().erase(pos());
// do nothing if the macro name is empty
if (s == "\\")
return false;
// prevent entering of recursive macros
// FIXME: this is only a weak attempt... only prevents immediate
// recursion
string const name = s.substr(1);
InsetBase const * macro = innerInsetOfType(InsetBase::MATHMACRO_CODE);
if (macro && macro->getInsetName() == name)
lyxerr << "can't enter recursive macro" << endl;
InsetMathNest * const in = inset().asInsetMath()->asNestInset();
if (in && in->interpret(*this, s))
return true;
plainInsert(createInsetMath(name));
return true;
}
string LCursor::macroName()
{
return inMacroMode() ? activeMacro()->name() : string();
}
void LCursor::handleNest(MathAtom const & a, int c)
{
//lyxerr << "LCursor::handleNest: " << c << endl;
MathAtom t = a;
// FIXME UNICODE
asArray(lyx::from_utf8(lyx::cap::grabAndEraseSelection(*this)), 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::setTargetX()
{
// For now this is good enough. A better solution would be to
// avoid this rebreak by setting cursorX only after drawing
bottom().text()->redoParagraph(bottom().pit());
int x;
int y;
getPos(x, y);
x_target_ = x;
}
bool LCursor::inMacroMode() const
{
if (pos() == 0)
return false;
InsetMathUnknown const * p = prevAtom()->asUnknownInset();
return p && !p->final();
}
InsetMathUnknown * LCursor::activeMacro()
{
return inMacroMode() ? prevAtom().nucleus()->asUnknownInset() : 0;
}
void LCursor::pullArg()
{
#ifdef WITH_WARNINGS
#warning Look here
#endif
MathArray ar = cell();
if (popLeft() && inMathed()) {
plainErase();
cell().insert(pos(), ar);
resetAnchor();
} else {
//formula()->mutateToText();
}
}
void LCursor::touch()
{
#ifdef WITH_WARNINGS
#warning look here
#endif
#if 0
DocIterator::const_iterator it = begin();
DocIterator::const_iterator et = end();
for ( ; it != et; ++it)
it->cell().touch();
#endif
}
void LCursor::normalize()
{
if (idx() > lastidx()) {
lyxerr << "this should not really happen - 1: "
<< idx() << ' ' << nargs()
<< " in: " << &inset() << endl;
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().asInsetMath()->write(wi);
lyxerr << endl;
pos() = lastpos();
}
}
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
// target
if (x_target() == -1)
x_target() = xo;
else
xo = x_target();
// try neigbouring script insets
if (!selection()) {
// try left
if (pos() != 0) {
InsetMathScript const * p = prevAtom()->asScriptInset();
if (p && p->has(up)) {
--pos();
push(*const_cast<InsetMathScript*>(p));
idx() = p->idxOfScript(up);
pos() = lastpos();
return true;
}
}
// try right
if (pos() != lastpos()) {
InsetMathScript const * p = nextAtom()->asScriptInset();
if (p && p->has(up)) {
push(*const_cast<InsetMathScript*>(p));
idx() = p->idxOfScript(up);
pos() = 0;
return true;
}
}
}
// FIXME: Switch this on for more robust movement
#if 0
return bruteFind3(*this, xo, yo, up);
#else
//xarray().boundingBox(xlow, xhigh, ylow, yhigh);
//if (up)
// yhigh = yo - 4;
//else
// ylow = yo + 4;
//if (bruteFind(*this, 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 (true) {
//lyxerr << "updown: We are in " << &inset() << " idx: " << idx() << endl;
// ask inset first
if (inset().idxUpDown(*this, up)) {
//lyxerr << "idxUpDown triggered" << endl;
// try to find best position within this inset
if (!selection())
setCursor(bruteFind2(*this, xo, yo));
return true;
}
// no such inset found, just take something "above"
if (!popLeft()) {
//lyxerr << "updown: popleft failed (strange case)" << endl;
int ylow = up ? 0 : yo + 1;
int yhigh = up ? yo - 1 : bv().workHeight();
return bruteFind(*this, xo, yo, 0, bv().workWidth(), ylow, yhigh);
}
// any improvement so far?
//lyxerr << "updown: popLeft succeeded" << endl;
int xnew;
int ynew;
getPos(xnew, ynew);
if (up ? ynew < yo : ynew > yo)
return true;
}
// we should not come here.
BOOST_ASSERT(false);
#endif
}
void LCursor::handleFont(string const & font)
{
lyxerr[Debug::DEBUG] << BOOST_CURRENT_FUNCTION << ": " << font << endl;
string safe;
if (selection()) {
macroModeClose();
safe = lyx::cap::grabAndEraseSelection(*this);
}
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 = createInsetMath(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(docstring const & msg) const
{
theLyXFunc().setMessage(msg);
}
void LCursor::errorMessage(docstring const & msg) const
{
theLyXFunc().setErrorMessage(msg);
}
docstring LCursor::selectionAsString(bool label) const
{
if (!selection())
return docstring();
if (inTexted()) {
Buffer const & buffer = *bv().buffer();
ParagraphList const & pars = text()->paragraphs();
// should be const ...
pit_type startpit = selBegin().pit();
pit_type endpit = selEnd().pit();
size_t const startpos = selBegin().pos();
size_t const endpos = selEnd().pos();
if (startpit == endpit)
return pars[startpit].asString(buffer, startpos, endpos, label);
// First paragraph in selection
docstring result = pars[startpit].
asString(buffer, startpos, pars[startpit].size(), label) + "\n\n";
// The paragraphs in between (if any)
for (pit_type pit = startpit + 1; pit != endpit; ++pit) {
Paragraph const & par = pars[pit];
result += par.asString(buffer, 0, par.size(), label) + "\n\n";
}
// Last paragraph in selection
result += pars[endpit].asString(buffer, 0, endpos, label);
return result;
}
if (inMathed())
return lyx::from_utf8(lyx::cap::grabSelection(*this));
return docstring();
}
string LCursor::currentState()
{
if (inMathed()) {
std::ostringstream os;
info(os);
return os.str();
}
if (inTexted())
return text()->currentState(*this);
return string();
}
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 = depth() - 1; s >= 0; --s)
if (operator[](s).text())
break;
CursorSlice const & sl = operator[](s);
LyXText const & text = *sl.text();
LyXFont font = text.getPar(sl.pit()).getFont(
bv().buffer()->params(), sl.pos(), outerFont(sl.pit(), text.paragraphs()));
return font.language()->encoding();
}
void LCursor::undispatched()
{
disp_.dispatched(false);
}
void LCursor::dispatched()
{
disp_.dispatched(true);
}
void LCursor::needsUpdate()
{
disp_.update(true);
}
void LCursor::noUpdate()
{
disp_.update(false);
}
LyXFont LCursor::getFont() const
{
// HACK. far from being perfect...
int s = 0;
// go up until first non-0 text is hit
// (innermost text is 0 in mathed)
for (s = depth() - 1; s >= 0; --s)
if (operator[](s).text())
break;
CursorSlice const & sl = operator[](s);
LyXText const & text = *sl.text();
LyXFont font = text.getPar(sl.pit()).getFont(
bv().buffer()->params(),
sl.pos(),
outerFont(sl.pit(), text.paragraphs()));
return font;
}
void LCursor::fixIfBroken()
{
// find out last good level
LCursor copy = *this;
size_t newdepth = depth();
while (!copy.empty()) {
if (copy.idx() > copy.lastidx()) {
lyxerr << "wrong idx " << copy.idx()
<< ", max is " << copy.lastidx()
<< " at level " << copy.depth()
<< ". Trying to correct this." << endl;
newdepth = copy.depth() - 1;
}
else if (copy.pit() > copy.lastpit()) {
lyxerr << "wrong pit " << copy.pit()
<< ", max is " << copy.lastpit()
<< " at level " << copy.depth()
<< ". Trying to correct this." << endl;
newdepth = copy.depth() - 1;
}
else if (copy.pos() > copy.lastpos()) {
lyxerr << "wrong pos " << copy.pos()
<< ", max is " << copy.lastpos()
<< " at level " << copy.depth()
<< ". Trying to correct this." << endl;
newdepth = copy.depth() - 1;
}
copy.pop();
}
// shrink cursor to a size where everything is valid, possibly
// leaving insets
while (depth() > newdepth) {
pop();
lyxerr << "correcting cursor to level " << depth() << endl;
}
}