lyx_mirror/src/paragraph_pimpl.C
Martin Vermeer 6f5a5fe88b * paragraph_pimpl.C
(Paragraph::Pimpl::erase): Replace fix r13885 by better fix



git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/branches/BRANCH_1_4_X@13928 a592a061-630c-0410-9148-cb99ea01b6c8
2006-05-25 11:47:33 +00:00

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/**
* \file paragraph_pimpl.C
* This file is part of LyX, the document processor.
* Licence details can be found in the file COPYING.
*
* \author Lars Gullik Bjønnes
* \author Jean-Marc Lasgouttes
* \author John Levon
* \author André Pönitz
*
* Full author contact details are available in file CREDITS.
*/
#include <config.h>
#include "paragraph_pimpl.h"
#include "paragraph.h"
#include "bufferparams.h"
#include "debug.h"
#include "encoding.h"
#include "language.h"
#include "LaTeXFeatures.h"
#include "LColor.h"
#include "lyxlength.h"
#include "lyxrc.h"
#include "outputparams.h"
#include "texrow.h"
#include <boost/next_prior.hpp>
using lyx::pos_type;
using std::endl;
using std::upper_bound;
using std::lower_bound;
using std::string;
using std::ostream;
// Initialization of the counter for the paragraph id's,
unsigned int Paragraph::Pimpl::paragraph_id = 0;
namespace {
struct special_phrase {
string phrase;
string macro;
bool builtin;
};
special_phrase special_phrases[] = {
{ "LyX", "\\LyX{}", false },
{ "TeX", "\\TeX{}", true },
{ "LaTeX2e", "\\LaTeXe{}", true },
{ "LaTeX", "\\LaTeX{}", true },
};
size_t const phrases_nr = sizeof(special_phrases)/sizeof(special_phrase);
} // namespace anon
Paragraph::Pimpl::Pimpl(Paragraph * owner)
: owner_(owner)
{
inset_owner = 0;
id_ = paragraph_id++;
}
Paragraph::Pimpl::Pimpl(Pimpl const & p, Paragraph * owner)
: params(p.params), owner_(owner)
{
inset_owner = p.inset_owner;
fontlist = p.fontlist;
id_ = paragraph_id++;
if (p.tracking())
changes_.reset(new Changes(*p.changes_.get()));
}
void Paragraph::Pimpl::setContentsFromPar(Paragraph const & par)
{
owner_->text_ = par.text_;
if (par.pimpl_->tracking()) {
changes_.reset(new Changes(*(par.pimpl_->changes_.get())));
}
}
void Paragraph::Pimpl::trackChanges(Change::Type type)
{
if (tracking()) {
lyxerr[Debug::CHANGES] << "already tracking for par " << id_ << endl;
return;
}
lyxerr[Debug::CHANGES] << "track changes for par "
<< id_ << " type " << type << endl;
changes_.reset(new Changes(type));
changes_->set(type, 0, size() + 1);
}
void Paragraph::Pimpl::untrackChanges()
{
changes_.reset(0);
}
void Paragraph::Pimpl::cleanChanges(Paragraph::ChangeTracking ct)
{
// if the paragraph was not tracked and we don't know the buffer's
// change tracking state, we do nothing
if ((ct == Paragraph::trackingUnknown) && !tracking())
return;
// untrack everything if we are in a buffer where ct is disabled
else if (ct == Paragraph::trackingOff) {
untrackChanges();
return;
}
// in a buffer where ct is enabled, set everything to INSERTED
changes_.reset(new Changes(Change::INSERTED));
changes_->set(Change::INSERTED, 0, size() + 1);
}
bool Paragraph::Pimpl::isChanged(pos_type start, pos_type end) const
{
if (!tracking())
return false;
return changes_->isChange(start, end);
}
bool Paragraph::Pimpl::isChangeEdited(pos_type start, pos_type end) const
{
if (!tracking())
return false;
return changes_->isChangeEdited(start, end);
}
void Paragraph::Pimpl::setChange(pos_type pos, Change::Type type)
{
if (!tracking())
return;
changes_->set(type, pos);
}
void Paragraph::Pimpl::setChangeFull(pos_type pos, Change change)
{
if (!tracking())
return;
changes_->set(change, pos);
}
Change::Type Paragraph::Pimpl::lookupChange(pos_type pos) const
{
if (!tracking())
return Change::UNCHANGED;
return changes_->lookup(pos);
}
Change const Paragraph::Pimpl::lookupChangeFull(pos_type pos) const
{
if (!tracking())
return Change(Change::UNCHANGED);
return changes_->lookupFull(pos);
}
void Paragraph::Pimpl::markErased(bool erased)
{
BOOST_ASSERT(tracking());
if (erased) {
erase(0, size());
} else {
for (pos_type i = 0; i < size(); ++i) {
changes_->set(Change::UNCHANGED, i);
if (owner_->isInset(i))
owner_->getInset(i)->markErased(false);
}
}
}
void Paragraph::Pimpl::acceptChange(pos_type start, pos_type end)
{
if (!tracking())
return;
if (!size()) {
changes_.reset(new Changes(Change::UNCHANGED));
return;
}
lyxerr[Debug::CHANGES] << "acceptchange" << endl;
pos_type i = start;
for (; i < end; ++i) {
switch (lookupChange(i)) {
case Change::UNCHANGED:
break;
case Change::INSERTED:
changes_->set(Change::UNCHANGED, i);
break;
case Change::DELETED:
// Suppress access to nonexistent
// "end-of-paragraph char":
if (i < size()) {
eraseIntern(i);
changes_->erase(i);
--end;
--i;
}
break;
}
}
lyxerr[Debug::CHANGES] << "endacceptchange" << endl;
changes_->reset(Change::UNCHANGED);
}
void Paragraph::Pimpl::rejectChange(pos_type start, pos_type end)
{
if (!tracking())
return;
if (!size()) {
changes_.reset(new Changes(Change::UNCHANGED));
return;
}
pos_type i = start;
for (; i < end; ++i) {
switch (lookupChange(i)) {
case Change::UNCHANGED:
break;
case Change::INSERTED:
if (i < size()) {
eraseIntern(i);
changes_->erase(i);
--end;
--i;
}
break;
case Change::DELETED:
changes_->set(Change::UNCHANGED, i);
// No real char at position size():
if (i < size() && owner_->isInset(i))
owner_->getInset(i)->markErased(false);
break;
}
}
changes_->reset(Change::UNCHANGED);
}
Paragraph::value_type Paragraph::Pimpl::getChar(pos_type pos) const
{
return owner_->getChar(pos);
}
void Paragraph::Pimpl::insertChar(pos_type pos, value_type c, Change change)
{
BOOST_ASSERT(pos <= size());
if (tracking()) {
changes_->record(change, pos);
}
// This is actually very common when parsing buffers (and
// maybe inserting ascii text)
if (pos == size()) {
// when appending characters, no need to update tables
owner_->text_.push_back(c);
return;
}
owner_->text_.insert(owner_->text_.begin() + pos, c);
// Update the font table.
FontTable search_font(pos, LyXFont());
for (FontList::iterator it = lower_bound(fontlist.begin(),
fontlist.end(),
search_font, matchFT());
it != fontlist.end(); ++it)
{
it->pos(it->pos() + 1);
}
// Update the insets
owner_->insetlist.increasePosAfterPos(pos);
}
void Paragraph::Pimpl::insertInset(pos_type pos,
InsetBase * inset, Change change)
{
BOOST_ASSERT(inset);
BOOST_ASSERT(pos <= size());
insertChar(pos, META_INSET, change);
BOOST_ASSERT(owner_->text_[pos] == META_INSET);
// Add a new entry in the insetlist.
owner_->insetlist.insert(inset, pos);
}
void Paragraph::Pimpl::eraseIntern(pos_type pos)
{
// if it is an inset, delete the inset entry
if (owner_->text_[pos] == Paragraph::META_INSET) {
owner_->insetlist.erase(pos);
}
owner_->text_.erase(owner_->text_.begin() + pos);
// Erase entries in the tables.
FontTable search_font(pos, LyXFont());
FontList::iterator it =
lower_bound(fontlist.begin(),
fontlist.end(),
search_font, matchFT());
if (it != fontlist.end() && it->pos() == pos &&
(pos == 0 ||
(it != fontlist.begin()
&& boost::prior(it)->pos() == pos - 1))) {
// If it is a multi-character font
// entry, we just make it smaller
// (see update below), otherwise we
// should delete it.
unsigned int const i = it - fontlist.begin();
fontlist.erase(fontlist.begin() + i);
it = fontlist.begin() + i;
if (i > 0 && i < fontlist.size() &&
fontlist[i - 1].font() == fontlist[i].font()) {
fontlist.erase(fontlist.begin() + i - 1);
it = fontlist.begin() + i - 1;
}
}
// Update all other entries.
FontList::iterator fend = fontlist.end();
for (; it != fend; ++it)
it->pos(it->pos() - 1);
// Update the insetlist.
owner_->insetlist.decreasePosAfterPos(pos);
}
bool Paragraph::Pimpl::erase(pos_type pos)
{
BOOST_ASSERT(pos <= size());
if (tracking()) {
Change::Type changetype(changes_->lookup(pos));
if (pos < size())
changes_->record(Change(Change::DELETED), pos);
// only allow the actual removal if it was /new/ text
if (changetype != Change::INSERTED) {
if (pos < size() && owner_->isInset(pos))
owner_->getInset(pos)->markErased(true);
return false;
}
}
// Don't physically access nonexistent end-of-paragraph char
if (pos < size()) {
eraseIntern(pos);
return true;
}
return false;
}
int Paragraph::Pimpl::erase(pos_type start, pos_type end)
{
pos_type i = start;
for (pos_type count = end - start; count; --count) {
if (!erase(i))
++i;
}
return end - i;
}
void Paragraph::Pimpl::simpleTeXBlanks(ostream & os, TexRow & texrow,
pos_type const i,
unsigned int & column,
LyXFont const & font,
LyXLayout const & style)
{
if (style.pass_thru)
return;
if (column > lyxrc.ascii_linelen
&& i
&& getChar(i - 1) != ' '
&& (i < size() - 1)
// same in FreeSpacing mode
&& !owner_->isFreeSpacing()
// In typewriter mode, we want to avoid
// ! . ? : at the end of a line
&& !(font.family() == LyXFont::TYPEWRITER_FAMILY
&& (getChar(i - 1) == '.'
|| getChar(i - 1) == '?'
|| getChar(i - 1) == ':'
|| getChar(i - 1) == '!'))) {
os << '\n';
texrow.newline();
texrow.start(owner_->id(), i + 1);
column = 0;
} else if (style.free_spacing) {
os << '~';
} else {
os << ' ';
}
}
bool Paragraph::Pimpl::isTextAt(string const & str, pos_type pos) const
{
pos_type const len = str.length();
// is the paragraph large enough?
if (pos + len > size())
return false;
// does the wanted text start at point?
for (string::size_type i = 0; i < str.length(); ++i) {
if (str[i] != owner_->text_[pos + i])
return false;
}
// is there a font change in middle of the word?
FontList::const_iterator cit = fontlist.begin();
FontList::const_iterator end = fontlist.end();
for (; cit != end; ++cit) {
if (cit->pos() >= pos)
break;
}
if (cit != end && pos + len - 1 > cit->pos())
return false;
return true;
}
void Paragraph::Pimpl::simpleTeXSpecialChars(Buffer const & buf,
BufferParams const & bparams,
ostream & os,
TexRow & texrow,
OutputParams const & runparams,
LyXFont & font,
LyXFont & running_font,
LyXFont & basefont,
LyXFont const & outerfont,
bool & open_font,
Change::Type & running_change,
LyXLayout const & style,
pos_type & i,
unsigned int & column,
value_type const c)
{
if (style.pass_thru) {
if (c != Paragraph::META_INSET) {
if (c != '\0')
os << c;
} else {
owner_->getInset(i)->plaintext(buf, os, runparams);
}
return;
}
// Two major modes: LaTeX or plain
// Handle here those cases common to both modes
// and then split to handle the two modes separately.
switch (c) {
case Paragraph::META_INSET: {
InsetBase * inset = owner_->getInset(i);
// FIXME: remove this check
if (!inset)
break;
// FIXME: move this to InsetNewline::latex
if (inset->lyxCode() == InsetBase::NEWLINE_CODE) {
// newlines are handled differently here than
// the default in simpleTeXSpecialChars().
if (!style.newline_allowed) {
os << '\n';
} else {
if (open_font) {
column += running_font.latexWriteEndChanges(os, basefont, basefont);
open_font = false;
}
basefont = owner_->getLayoutFont(bparams, outerfont);
running_font = basefont;
if (font.family() == LyXFont::TYPEWRITER_FAMILY)
os << '~';
if (runparams.moving_arg)
os << "\\protect ";
os << "\\\\\n";
}
texrow.newline();
texrow.start(owner_->id(), i + 1);
column = 0;
break;
}
// output change tracking marks only if desired,
// if dvipost is installed,
// and with dvi/ps (other formats don't work)
LaTeXFeatures features(buf, bparams, runparams);
bool const output = bparams.output_changes
&& runparams.flavor == OutputParams::LATEX
&& features.isAvailable("dvipost");
if (inset->canTrackChanges()) {
column += Changes::latexMarkChange(os, running_change,
Change::UNCHANGED, output);
running_change = Change::UNCHANGED;
}
bool close = false;
ostream::pos_type const len = os.tellp();
if ((inset->lyxCode() == InsetBase::GRAPHICS_CODE
|| inset->lyxCode() == InsetBase::MATH_CODE
|| inset->lyxCode() == InsetBase::URL_CODE)
&& running_font.isRightToLeft()) {
os << "\\L{";
close = true;
}
#ifdef WITH_WARNINGS
#warning Bug: we can have an empty font change here!
// if there has just been a font change, we are going to close it
// right now, which means stupid latex code like \textsf{}. AFAIK,
// this does not harm dvi output. A minor bug, thus (JMarc)
#endif
// some insets cannot be inside a font change command
if (open_font && inset->noFontChange()) {
column +=running_font.
latexWriteEndChanges(os,
basefont,
basefont);
open_font = false;
basefont = owner_->getLayoutFont(bparams, outerfont);
running_font = basefont;
}
int tmp = inset->latex(buf, os, runparams);
if (close)
os << '}';
if (tmp) {
for (int j = 0; j < tmp; ++j) {
texrow.newline();
}
texrow.start(owner_->id(), i + 1);
column = 0;
} else {
column += os.tellp() - len;
}
}
break;
default:
// And now for the special cases within each mode
switch (c) {
case '\\':
os << "\\textbackslash{}";
column += 15;
break;
case '±': case '²': case '³':
case '×': case '÷': case '¹':
case '¬': case 'µ':
if ((bparams.inputenc == "latin1" ||
bparams.inputenc == "latin9") ||
(bparams.inputenc == "auto" &&
(font.language()->encoding()->LatexName()
== "latin1" ||
font.language()->encoding()->LatexName()
== "latin9"))) {
os << "\\ensuremath{"
<< c
<< '}';
column += 13;
} else {
os << c;
}
break;
case '|': case '<': case '>':
// In T1 encoding, these characters exist
if (lyxrc.fontenc == "T1") {
os << c;
//... but we should avoid ligatures
if ((c == '>' || c == '<')
&& i <= size() - 2
&& getChar(i + 1) == c) {
//os << "\\textcompwordmark{}";
// Jean-Marc, have a look at
// this. I think this works
// equally well:
os << "\\,{}";
// Lgb
column += 19;
}
break;
}
// Typewriter font also has them
if (font.family() == LyXFont::TYPEWRITER_FAMILY) {
os << c;
break;
}
// Otherwise, we use what LaTeX
// provides us.
switch (c) {
case '<':
os << "\\textless{}";
column += 10;
break;
case '>':
os << "\\textgreater{}";
column += 13;
break;
case '|':
os << "\\textbar{}";
column += 9;
break;
}
break;
case '-': // "--" in Typewriter mode -> "-{}-"
if (i <= size() - 2
&& getChar(i + 1) == '-'
&& font.family() == LyXFont::TYPEWRITER_FAMILY) {
os << "-{}";
column += 2;
} else {
os << '-';
}
break;
case '\"':
os << "\\char`\\\"{}";
column += 9;
break;
case '£':
if (bparams.inputenc == "default") {
os << "\\pounds{}";
column += 8;
} else {
os << c;
}
break;
case '$': case '&':
case '%': case '#': case '{':
case '}': case '_':
os << '\\' << c;
column += 1;
break;
case '~':
os << "\\textasciitilde{}";
column += 16;
break;
case '^':
os << "\\textasciicircum{}";
column += 17;
break;
case '*': case '[':
// avoid being mistaken for optional arguments
os << '{' << c << '}';
column += 2;
break;
case ' ':
// Blanks are printed before font switching.
// Sure? I am not! (try nice-latex)
// I am sure it's correct. LyX might be smarter
// in the future, but for now, nothing wrong is
// written. (Asger)
break;
default:
// I assume this is hack treating typewriter as verbatim
if (font.family() == LyXFont::TYPEWRITER_FAMILY) {
if (c != '\0') {
os << c;
}
break;
}
// LyX, LaTeX etc.
// FIXME: if we have "LaTeX" with a font
// change in the middle (before the 'T', then
// the "TeX" part is still special cased.
// Really we should only operate this on
// "words" for some definition of word
size_t pnr = 0;
for (; pnr < phrases_nr; ++pnr) {
if (isTextAt(special_phrases[pnr].phrase, i)) {
os << special_phrases[pnr].macro;
i += special_phrases[pnr].phrase.length() - 1;
column += special_phrases[pnr].macro.length() - 1;
break;
}
}
if (pnr == phrases_nr && c != '\0') {
os << c;
}
break;
}
}
}
void Paragraph::Pimpl::validate(LaTeXFeatures & features,
LyXLayout const & layout) const
{
BufferParams const & bparams = features.bufferParams();
// check the params.
if (!params.spacing().isDefault())
features.require("setspace");
// then the layouts
features.useLayout(layout.name());
// then the fonts
Language const * doc_language = bparams.language;
FontList::const_iterator fcit = fontlist.begin();
FontList::const_iterator fend = fontlist.end();
for (; fcit != fend; ++fcit) {
if (fcit->font().noun() == LyXFont::ON) {
lyxerr[Debug::LATEX] << "font.noun: "
<< fcit->font().noun()
<< endl;
features.require("noun");
lyxerr[Debug::LATEX] << "Noun enabled. Font: "
<< fcit->font().stateText(0)
<< endl;
}
switch (fcit->font().color()) {
case LColor::none:
case LColor::inherit:
case LColor::ignore:
// probably we should put here all interface colors used for
// font displaying! For now I just add this ones I know of (Jug)
case LColor::latex:
case LColor::note:
break;
default:
features.require("color");
lyxerr[Debug::LATEX] << "Color enabled. Font: "
<< fcit->font().stateText(0)
<< endl;
}
Language const * language = fcit->font().language();
if (language->babel() != doc_language->babel() &&
language != ignore_language &&
language != latex_language)
{
features.useLanguage(language);
lyxerr[Debug::LATEX] << "Found language "
<< language->babel() << endl;
}
}
if (!params.leftIndent().zero())
features.require("ParagraphLeftIndent");
// then the insets
InsetList::const_iterator icit = owner_->insetlist.begin();
InsetList::const_iterator iend = owner_->insetlist.end();
for (; icit != iend; ++icit) {
if (icit->inset) {
icit->inset->validate(features);
if (layout.needprotect &&
icit->inset->lyxCode() == InsetBase::FOOT_CODE)
features.require("NeedLyXFootnoteCode");
}
}
// then the contents
for (pos_type i = 0; i < size() ; ++i) {
for (size_t pnr = 0; pnr < phrases_nr; ++pnr) {
if (!special_phrases[pnr].builtin
&& isTextAt(special_phrases[pnr].phrase, i)) {
features.require(special_phrases[pnr].phrase);
break;
}
}
}
}