lyx_mirror/src/paragraph_funcs.C
Martin Vermeer 6688a55908 Fix bug 2115 ("blueline bug")
git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@10808 a592a061-630c-0410-9148-cb99ea01b6c8
2006-02-05 13:20:16 +00:00

351 lines
8.5 KiB
C

/**
* \file paragraph_funcs.C
* This file is part of LyX, the document processor.
* Licence details can be found in the file COPYING.
*
* \author Lars Gullik Bjønnes
*
* Full author contact details are available in file CREDITS.
*/
#include <config.h>
#include "paragraph_funcs.h"
#include "buffer.h"
#include "bufferparams.h"
#include "debug.h"
#include "encoding.h"
#include "gettext.h"
#include "language.h"
#include "lyxrow.h"
#include "lyxtext.h"
#include "outputparams.h"
#include "paragraph_pimpl.h"
#include "pariterator.h"
#include "sgml.h"
#include "texrow.h"
#include "vspace.h"
#include "support/filetools.h"
#include "support/lstrings.h"
#include "support/lyxlib.h"
#include <sstream>
#include <vector>
using lyx::pos_type;
using lyx::pit_type;
using lyx::support::ascii_lowercase;
using lyx::support::bformat;
using lyx::support::compare_ascii_no_case;
using lyx::support::compare_no_case;
using lyx::support::contains;
using lyx::support::split;
using lyx::support::subst;
using std::auto_ptr;
using std::endl;
using std::string;
using std::vector;
using std::istringstream;
using std::ostream;
using std::pair;
namespace {
bool moveItem(Paragraph & from, Paragraph & to,
BufferParams const & params, pos_type i, pos_type j,
Change change = Change(Change::INSERTED));
bool moveItem(Paragraph & from, Paragraph & to,
BufferParams const & params, pos_type i, pos_type j,
Change change)
{
Paragraph::value_type const tmpchar = from.getChar(i);
LyXFont tmpfont = from.getFontSettings(params, i);
if (tmpchar == Paragraph::META_INSET) {
InsetBase * tmpinset = 0;
if (from.getInset(i)) {
// the inset is not in a paragraph anymore
tmpinset = from.insetlist.release(i);
from.insetlist.erase(i);
}
if (!to.insetAllowed(tmpinset->lyxCode())) {
delete tmpinset;
return false;
}
if (tmpinset)
to.insertInset(j, tmpinset, tmpfont, change);
} else {
to.insertChar(j, tmpchar, tmpfont, change);
}
return true;
}
}
void breakParagraph(BufferParams const & bparams,
ParagraphList & pars, pit_type par_offset, pos_type pos, int flag)
{
// create a new paragraph, and insert into the list
ParagraphList::iterator tmp =
pars.insert(pars.begin() + par_offset + 1, Paragraph());
Paragraph & par = pars[par_offset];
// we will invalidate the row cache
par.rows().clear();
// without doing that we get a crash when typing <Return> at the
// end of a paragraph
tmp->layout(bparams.getLyXTextClass().defaultLayout());
// remember to set the inset_owner
tmp->setInsetOwner(par.inInset());
if (bparams.tracking_changes)
tmp->trackChanges();
// this is an idea for a more userfriendly layout handling, I will
// see what the users say
// layout stays the same with latex-environments
if (flag) {
tmp->layout(par.layout());
tmp->setLabelWidthString(par.params().labelWidthString());
}
bool const isempty = (par.allowEmpty() && par.empty());
if (!isempty && (par.size() > pos || par.empty() || flag == 2)) {
tmp->layout(par.layout());
tmp->params().align(par.params().align());
tmp->setLabelWidthString(par.params().labelWidthString());
tmp->params().depth(par.params().depth());
tmp->params().noindent(par.params().noindent());
// copy everything behind the break-position
// to the new paragraph
/* Note: if !keepempty, empty() == true, then we reach
* here with size() == 0. So pos_end becomes - 1. This
* doesn't cause problems because both loops below
* enforce pos <= pos_end and 0 <= pos
*/
pos_type pos_end = par.size() - 1;
for (pos_type i = pos, j = pos; i <= pos_end; ++i) {
Change::Type change = par.lookupChange(i);
if (moveItem(par, *tmp, bparams, i, j - pos)) {
tmp->setChange(j - pos, change);
++j;
}
}
for (pos_type i = pos_end; i >= pos; --i)
par.eraseIntern(i);
}
if (pos) {
// Make sure that we keep the language when
// breaking paragrpah.
if (tmp->empty()) {
LyXFont changed = tmp->getFirstFontSettings(bparams);
LyXFont old = par.getFontSettings(bparams, par.size());
changed.setLanguage(old.language());
tmp->setFont(0, changed);
}
return;
}
if (!isempty) {
par.params().clear();
par.layout(bparams.getLyXTextClass().defaultLayout());
}
// layout stays the same with latex-environments
if (flag) {
par.layout(tmp->layout());
par.setLabelWidthString(tmp->params().labelWidthString());
par.params().depth(tmp->params().depth());
}
// subtle, but needed to get empty pars working right
if (bparams.tracking_changes) {
if (!par.size()) {
par.cleanChanges();
} else if (!tmp->size()) {
tmp->cleanChanges();
}
}
}
void breakParagraphConservative(BufferParams const & bparams,
ParagraphList & pars, pit_type par_offset, pos_type pos)
{
// create a new paragraph
Paragraph & tmp = *pars.insert(pars.begin() + par_offset + 1, Paragraph());
Paragraph & par = pars[par_offset];
if (bparams.tracking_changes)
tmp.trackChanges();
tmp.makeSameLayout(par);
// When can pos > size()?
// I guess pos == size() is possible.
if (par.size() > pos) {
// copy everything behind the break-position to the new
// paragraph
pos_type pos_end = par.size() - 1;
for (pos_type i = pos, j = pos; i <= pos_end; ++i) {
Change::Type change = par.lookupChange(i);
if (moveItem(par, tmp, bparams, i, j - pos, change))
++j;
}
// If tracking changes, set all the text that is to be
// erased to Type::INSERTED.
for (pos_type k = pos_end; k >= pos; --k) {
if (bparams.tracking_changes)
par.setChange(k, Change::INSERTED);
par.erase(k);
}
}
}
void mergeParagraph(BufferParams const & bparams,
ParagraphList & pars, pit_type par_offset)
{
Paragraph & next = pars[par_offset + 1];
Paragraph & par = pars[par_offset];
pos_type pos_end = next.size() - 1;
pos_type pos_insert = par.size();
// ok, now copy the paragraph
for (pos_type i = 0, j = 0; i <= pos_end; ++i) {
Change::Type change = next.lookupChange(i);
if (moveItem(next, par, bparams, i, pos_insert + j, change))
++j;
}
pars.erase(pars.begin() + par_offset + 1);
}
pit_type depthHook(pit_type pit,
ParagraphList const & pars, Paragraph::depth_type depth)
{
pit_type newpit = pit;
if (newpit != 0)
--newpit;
while (newpit != 0 && pars[newpit].getDepth() > depth)
--newpit;
if (pars[newpit].getDepth() > depth)
return pit;
return newpit;
}
pit_type outerHook(pit_type par_offset, ParagraphList const & pars)
{
Paragraph const & par = pars[par_offset];
if (par.getDepth() == 0)
return pars.size();
return depthHook(par_offset, pars, Paragraph::depth_type(par.getDepth() - 1));
}
bool isFirstInSequence(pit_type par_offset, ParagraphList const & pars)
{
Paragraph const & par = pars[par_offset];
pit_type dhook_offset = depthHook(par_offset, pars, par.getDepth());
Paragraph const & dhook = pars[dhook_offset];
return dhook_offset == par_offset
|| dhook.layout() != par.layout()
|| dhook.getDepth() != par.getDepth();
}
int getEndLabel(pit_type p, ParagraphList const & pars)
{
pit_type pit = p;
Paragraph::depth_type par_depth = pars[p].getDepth();
while (pit != pit_type(pars.size())) {
LyXLayout_ptr const & layout = pars[pit].layout();
int const endlabeltype = layout->endlabeltype;
if (endlabeltype != END_LABEL_NO_LABEL) {
if (p + 1 == pit_type(pars.size()))
return endlabeltype;
Paragraph::depth_type const next_depth =
pars[p + 1].getDepth();
if (par_depth > next_depth ||
(par_depth == next_depth && layout != pars[p + 1].layout()))
return endlabeltype;
break;
}
if (par_depth == 0)
break;
pit = outerHook(pit, pars);
if (pit != pit_type(pars.size()))
par_depth = pars[pit].getDepth();
}
return END_LABEL_NO_LABEL;
}
LyXFont const outerFont(pit_type par_offset, ParagraphList const & pars)
{
Paragraph::depth_type par_depth = pars[par_offset].getDepth();
LyXFont tmpfont(LyXFont::ALL_INHERIT);
// Resolve against environment font information
while (par_offset != pit_type(pars.size())
&& par_depth
&& !tmpfont.resolved()) {
par_offset = outerHook(par_offset, pars);
if (par_offset != pit_type(pars.size())) {
tmpfont.realize(pars[par_offset].layout()->font);
par_depth = pars[par_offset].getDepth();
}
}
return tmpfont;
}
/// return the number of InsetOptArg in a paragraph
int numberOfOptArgs(Paragraph const & par)
{
int num = 0;
InsetList::const_iterator it = par.insetlist.begin();
InsetList::const_iterator end = par.insetlist.end();
for (; it != end ; ++it) {
if (it->inset->lyxCode() == InsetBase::OPTARG_CODE)
++num;
}
return num;
}