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lyx_mirror/src/Text.cpp
Jean-Marc Lasgouttes ed3d9544a3 Improve undo of consecutive insertions/deletions 
The old scheme was:
 * multiple insertions are undone by groups of 20
 * multiple deletions are undone in one big block

The new scheme is to stop merging undo elements after 2 seconds of elapsed time.

Moreover, the merging of undo elements stops when the cursor has moved. Potentially, this could allow to remove many of the finishUndo() calls.

Fixes bug #9204.
2015-03-16 18:31:22 +01:00

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/**
* \file src/Text.cpp
* This file is part of LyX, the document processor.
* Licence details can be found in the file COPYING.
*
* \author Asger Alstrup
* \author Lars Gullik Bjønnes
* \author Dov Feldstern
* \author Jean-Marc Lasgouttes
* \author John Levon
* \author André Pönitz
* \author Stefan Schimanski
* \author Dekel Tsur
* \author Jürgen Vigna
*
* Full author contact details are available in file CREDITS.
*/
#include <config.h>
#include "Text.h"
#include "Author.h"
#include "Buffer.h"
#include "buffer_funcs.h"
#include "BufferParams.h"
#include "BufferView.h"
#include "Changes.h"
#include "CompletionList.h"
#include "Cursor.h"
#include "CutAndPaste.h"
#include "DispatchResult.h"
#include "Encoding.h"
#include "ErrorList.h"
#include "FuncRequest.h"
#include "factory.h"
#include "InsetList.h"
#include "Language.h"
#include "Layout.h"
#include "Length.h"
#include "Lexer.h"
#include "lyxfind.h"
#include "LyXRC.h"
#include "Paragraph.h"
#include "ParagraphParameters.h"
#include "ParIterator.h"
#include "TextClass.h"
#include "TextMetrics.h"
#include "WordLangTuple.h"
#include "WordList.h"
#include "insets/InsetText.h"
#include "insets/InsetBibitem.h"
#include "insets/InsetCaption.h"
#include "insets/InsetNewline.h"
#include "insets/InsetNewpage.h"
#include "insets/InsetArgument.h"
#include "insets/InsetIPAMacro.h"
#include "insets/InsetSpace.h"
#include "insets/InsetSpecialChar.h"
#include "insets/InsetTabular.h"
#include "support/convert.h"
#include "support/debug.h"
#include "support/docstream.h"
#include "support/gettext.h"
#include "support/lassert.h"
#include "support/lstrings.h"
#include "support/textutils.h"
#include <boost/next_prior.hpp>
#include <limits>
#include <sstream>
// TODO: replace if in Text::readParToken() with compile time switch
#if 0
#include "support/metahash.h"
typedef boost::mpl::string<'\\end','_lay','out'> end_layout;
typedef boost::mpl::string<'\\end','in','set'> end_inset;
void foo()
{
std::string token = "\\end_layout";
switch (boost::hash_value(token)) {
case lyx::support::hash_string<end_layout>::value:
return;
case lyx::support::hash_string<end_inset>::value:
return;
default: ;
};
}
#endif
using namespace std;
using namespace lyx::support;
namespace lyx {
using cap::cutSelection;
using cap::pasteParagraphList;
static bool moveItem(Paragraph & fromPar, pos_type fromPos,
Paragraph & toPar, pos_type toPos, BufferParams const & params)
{
// Note: moveItem() does not honour change tracking!
// Therefore, it should only be used for breaking and merging paragraphs
// We need a copy here because the character at fromPos is going to be erased.
Font const tmpFont = fromPar.getFontSettings(params, fromPos);
Change const tmpChange = fromPar.lookupChange(fromPos);
if (Inset * tmpInset = fromPar.getInset(fromPos)) {
fromPar.releaseInset(fromPos);
// The inset is not in fromPar any more.
if (!toPar.insertInset(toPos, tmpInset, tmpFont, tmpChange)) {
delete tmpInset;
return false;
}
return true;
}
char_type const tmpChar = fromPar.getChar(fromPos);
fromPar.eraseChar(fromPos, false);
toPar.insertChar(toPos, tmpChar, tmpFont, tmpChange);
return true;
}
void breakParagraphConservative(BufferParams const & bparams,
ParagraphList & pars, pit_type par_offset, pos_type pos)
{
// create a new paragraph
Paragraph & tmp = *pars.insert(boost::next(pars.begin(), par_offset + 1),
Paragraph());
Paragraph & par = pars[par_offset];
tmp.setInsetOwner(&par.inInset());
tmp.makeSameLayout(par);
LASSERT(pos <= par.size(), return);
if (pos < par.size()) {
// move everything behind the break position to the new paragraph
pos_type pos_end = par.size() - 1;
for (pos_type i = pos, j = 0; i <= pos_end; ++i) {
if (moveItem(par, pos, tmp, j, bparams)) {
++j;
}
}
// Move over the end-of-par change information
tmp.setChange(tmp.size(), par.lookupChange(par.size()));
par.setChange(par.size(), Change(bparams.track_changes ?
Change::INSERTED : Change::UNCHANGED));
}
}
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();
// the imaginary end-of-paragraph character (at par.size()) has to be
// marked as unmodified. Otherwise, its change is adopted by the first
// character of the next paragraph.
if (par.isChanged(par.size())) {
LYXERR(Debug::CHANGES,
"merging par with inserted/deleted end-of-par character");
par.setChange(par.size(), Change(Change::UNCHANGED));
}
Change change = next.lookupChange(next.size());
// move the content of the second paragraph to the end of the first one
for (pos_type i = 0, j = pos_insert; i <= pos_end; ++i) {
if (moveItem(next, 0, par, j, bparams)) {
++j;
}
}
// move the change of the end-of-paragraph character
par.setChange(par.size(), change);
pars.erase(boost::next(pars.begin(), par_offset + 1));
}
Text::Text(InsetText * owner, bool use_default_layout)
: owner_(owner), autoBreakRows_(false)
{
pars_.push_back(Paragraph());
Paragraph & par = pars_.back();
par.setInsetOwner(owner);
DocumentClass const & dc = owner->buffer().params().documentClass();
if (use_default_layout)
par.setDefaultLayout(dc);
else
par.setPlainLayout(dc);
}
Text::Text(InsetText * owner, Text const & text)
: owner_(owner), autoBreakRows_(text.autoBreakRows_)
{
pars_ = text.pars_;
ParagraphList::iterator const end = pars_.end();
ParagraphList::iterator it = pars_.begin();
for (; it != end; ++it)
it->setInsetOwner(owner);
}
pit_type Text::depthHook(pit_type pit, depth_type depth) const
{
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 Text::outerHook(pit_type par_offset) const
{
Paragraph const & par = pars_[par_offset];
if (par.getDepth() == 0)
return pars_.size();
return depthHook(par_offset, depth_type(par.getDepth() - 1));
}
bool Text::isFirstInSequence(pit_type par_offset) const
{
Paragraph const & par = pars_[par_offset];
pit_type dhook_offset = depthHook(par_offset, par.getDepth());
if (dhook_offset == par_offset)
return true;
Paragraph const & dhook = pars_[dhook_offset];
return dhook.layout() != par.layout()
|| dhook.getDepth() != par.getDepth();
}
int Text::getTocLevel(pit_type par_offset) const
{
Paragraph const & par = pars_[par_offset];
if (par.layout().isEnvironment() && !isFirstInSequence(par_offset))
return Layout::NOT_IN_TOC;
return par.layout().toclevel;
}
Font const Text::outerFont(pit_type par_offset) const
{
depth_type par_depth = pars_[par_offset].getDepth();
FontInfo tmpfont = inherit_font;
depth_type prev_par_depth = 0;
// Resolve against environment font information
while (par_offset != pit_type(pars_.size())
&& par_depth != prev_par_depth
&& par_depth
&& !tmpfont.resolved()) {
prev_par_depth = par_depth;
par_offset = outerHook(par_offset);
if (par_offset != pit_type(pars_.size())) {
tmpfont.realize(pars_[par_offset].layout().font);
par_depth = pars_[par_offset].getDepth();
}
}
return Font(tmpfont);
}
static void acceptOrRejectChanges(ParagraphList & pars,
BufferParams const & bparams, Text::ChangeOp op)
{
pit_type pars_size = static_cast<pit_type>(pars.size());
// first, accept or reject changes within each individual
// paragraph (do not consider end-of-par)
for (pit_type pit = 0; pit < pars_size; ++pit) {
// prevent assertion failure
if (!pars[pit].empty()) {
if (op == Text::ACCEPT)
pars[pit].acceptChanges(0, pars[pit].size());
else
pars[pit].rejectChanges(0, pars[pit].size());
}
}
// next, accept or reject imaginary end-of-par characters
for (pit_type pit = 0; pit < pars_size; ++pit) {
pos_type pos = pars[pit].size();
if (pars[pit].isChanged(pos)) {
// keep the end-of-par char if it is inserted and accepted
// or when it is deleted and rejected.
if (pars[pit].isInserted(pos) == (op == Text::ACCEPT)) {
pars[pit].setChange(pos, Change(Change::UNCHANGED));
} else {
if (pit == pars_size - 1) {
// we cannot remove a par break at the end of the last
// paragraph; instead, we mark it unchanged
pars[pit].setChange(pos, Change(Change::UNCHANGED));
} else {
mergeParagraph(bparams, pars, pit);
--pit;
--pars_size;
}
}
}
}
}
void acceptChanges(ParagraphList & pars, BufferParams const & bparams)
{
acceptOrRejectChanges(pars, bparams, Text::ACCEPT);
}
void rejectChanges(ParagraphList & pars, BufferParams const & bparams)
{
acceptOrRejectChanges(pars, bparams, Text::REJECT);
}
InsetText const & Text::inset() const
{
return *owner_;
}
void Text::readParToken(Paragraph & par, Lexer & lex,
string const & token, Font & font, Change & change, ErrorList & errorList)
{
Buffer * buf = const_cast<Buffer *>(&owner_->buffer());
BufferParams const & bp = buf->params();
if (token[0] != '\\') {
docstring dstr = lex.getDocString();
par.appendString(dstr, font, change);
} else if (token == "\\begin_layout") {
lex.eatLine();
docstring layoutname = lex.getDocString();
font = Font(inherit_font, bp.language);
change = Change(Change::UNCHANGED);
DocumentClass const & tclass = bp.documentClass();
if (layoutname.empty())
layoutname = tclass.defaultLayoutName();
if (owner_->forcePlainLayout()) {
// in this case only the empty layout is allowed
layoutname = tclass.plainLayoutName();
} else if (par.usePlainLayout()) {
// in this case, default layout maps to empty layout
if (layoutname == tclass.defaultLayoutName())
layoutname = tclass.plainLayoutName();
} else {
// otherwise, the empty layout maps to the default
if (layoutname == tclass.plainLayoutName())
layoutname = tclass.defaultLayoutName();
}
// When we apply an unknown layout to a document, we add this layout to the textclass
// of this document. For example, when you apply class article to a beamer document,
// all unknown layouts such as frame will be added to document class article so that
// these layouts can keep their original names.
bool const added_one = tclass.addLayoutIfNeeded(layoutname);
if (added_one) {
// Warn the user.
docstring const s = bformat(_("Layout `%1$s' was not found."), layoutname);
errorList.push_back(
ErrorItem(_("Layout Not Found"), s, par.id(), 0, par.size()));
}
par.setLayout(bp.documentClass()[layoutname]);
// Test whether the layout is obsolete.
Layout const & layout = par.layout();
if (!layout.obsoleted_by().empty())
par.setLayout(bp.documentClass()[layout.obsoleted_by()]);
par.params().read(lex);
} else if (token == "\\end_layout") {
LYXERR0("Solitary \\end_layout in line " << lex.lineNumber() << "\n"
<< "Missing \\begin_layout ?");
} else if (token == "\\end_inset") {
LYXERR0("Solitary \\end_inset in line " << lex.lineNumber() << "\n"
<< "Missing \\begin_inset ?");
} else if (token == "\\begin_inset") {
Inset * inset = readInset(lex, buf);
if (inset)
par.insertInset(par.size(), inset, font, change);
else {
lex.eatLine();
docstring line = lex.getDocString();
errorList.push_back(ErrorItem(_("Unknown Inset"), line,
par.id(), 0, par.size()));
}
} else if (token == "\\family") {
lex.next();
setLyXFamily(lex.getString(), font.fontInfo());
} else if (token == "\\series") {
lex.next();
setLyXSeries(lex.getString(), font.fontInfo());
} else if (token == "\\shape") {
lex.next();
setLyXShape(lex.getString(), font.fontInfo());
} else if (token == "\\size") {
lex.next();
setLyXSize(lex.getString(), font.fontInfo());
} else if (token == "\\lang") {
lex.next();
string const tok = lex.getString();
Language const * lang = languages.getLanguage(tok);
if (lang) {
font.setLanguage(lang);
} else {
font.setLanguage(bp.language);
lex.printError("Unknown language `$$Token'");
}
} else if (token == "\\numeric") {
lex.next();
font.fontInfo().setNumber(setLyXMisc(lex.getString()));
} else if (token == "\\emph") {
lex.next();
font.fontInfo().setEmph(setLyXMisc(lex.getString()));
} else if (token == "\\bar") {
lex.next();
string const tok = lex.getString();
if (tok == "under")
font.fontInfo().setUnderbar(FONT_ON);
else if (tok == "no")
font.fontInfo().setUnderbar(FONT_OFF);
else if (tok == "default")
font.fontInfo().setUnderbar(FONT_INHERIT);
else
lex.printError("Unknown bar font flag "
"`$$Token'");
} else if (token == "\\strikeout") {
lex.next();
font.fontInfo().setStrikeout(setLyXMisc(lex.getString()));
} else if (token == "\\uuline") {
lex.next();
font.fontInfo().setUuline(setLyXMisc(lex.getString()));
} else if (token == "\\uwave") {
lex.next();
font.fontInfo().setUwave(setLyXMisc(lex.getString()));
} else if (token == "\\noun") {
lex.next();
font.fontInfo().setNoun(setLyXMisc(lex.getString()));
} else if (token == "\\color") {
lex.next();
setLyXColor(lex.getString(), font.fontInfo());
} else if (token == "\\SpecialChar" ||
(token == "\\SpecialCharNoPassThru" &&
!par.layout().pass_thru && !inset().isPassThru())) {
auto_ptr<Inset> inset;
inset.reset(new InsetSpecialChar);
inset->read(lex);
inset->setBuffer(*buf);
par.insertInset(par.size(), inset.release(), font, change);
} else if (token == "\\SpecialCharNoPassThru") {
lex.next();
docstring const s = ltrim(lex.getDocString(), "\\");
par.insert(par.size(), s, font, change);
} else if (token == "\\IPAChar") {
auto_ptr<Inset> inset;
inset.reset(new InsetIPAChar);
inset->read(lex);
inset->setBuffer(*buf);
par.insertInset(par.size(), inset.release(), font, change);
} else if (token == "\\twohyphens" || token == "\\threehyphens") {
// Ideally, this should be done by lyx2lyx, but lyx2lyx does not know the
// running font and does not know anything about layouts (and CopyStyle).
Layout const & layout(par.layout());
FontInfo info = font.fontInfo();
info.realize(layout.resfont);
if (layout.pass_thru || inset().isPassThru() ||
info.family() == TYPEWRITER_FAMILY) {
if (token == "\\twohyphens")
par.insert(par.size(), from_ascii("--"), font, change);
else
par.insert(par.size(), from_ascii("---"), font, change);
} else {
if (token == "\\twohyphens")
par.insertChar(par.size(), 0x2013, font, change);
else
par.insertChar(par.size(), 0x2014, font, change);
}
} else if (token == "\\backslash") {
par.appendChar('\\', font, change);
} else if (token == "\\LyXTable") {
auto_ptr<Inset> inset(new InsetTabular(buf));
inset->read(lex);
par.insertInset(par.size(), inset.release(), font, change);
} else if (token == "\\change_unchanged") {
change = Change(Change::UNCHANGED);
} else if (token == "\\change_inserted" || token == "\\change_deleted") {
lex.eatLine();
istringstream is(lex.getString());
int aid;
time_t ct;
is >> aid >> ct;
BufferParams::AuthorMap const & am = bp.author_map;
if (am.find(aid) == am.end()) {
errorList.push_back(ErrorItem(_("Change tracking error"),
bformat(_("Unknown author index for change: %1$d\n"), aid),
par.id(), 0, par.size()));
change = Change(Change::UNCHANGED);
} else {
if (token == "\\change_inserted")
change = Change(Change::INSERTED, am.find(aid)->second, ct);
else
change = Change(Change::DELETED, am.find(aid)->second, ct);
}
} else {
lex.eatLine();
errorList.push_back(ErrorItem(_("Unknown token"),
bformat(_("Unknown token: %1$s %2$s\n"), from_utf8(token),
lex.getDocString()),
par.id(), 0, par.size()));
}
}
void Text::readParagraph(Paragraph & par, Lexer & lex,
ErrorList & errorList)
{
lex.nextToken();
string token = lex.getString();
Font font;
Change change(Change::UNCHANGED);
while (lex.isOK()) {
readParToken(par, lex, token, font, change, errorList);
lex.nextToken();
token = lex.getString();
if (token.empty())
continue;
if (token == "\\end_layout") {
//Ok, paragraph finished
break;
}
LYXERR(Debug::PARSER, "Handling paragraph token: `" << token << '\'');
if (token == "\\begin_layout" || token == "\\end_document"
|| token == "\\end_inset" || token == "\\begin_deeper"
|| token == "\\end_deeper") {
lex.pushToken(token);
lyxerr << "Paragraph ended in line "
<< lex.lineNumber() << "\n"
<< "Missing \\end_layout.\n";
break;
}
}
// Final change goes to paragraph break:
par.setChange(par.size(), change);
// Initialize begin_of_body_ on load; redoParagraph maintains
par.setBeginOfBody();
// mark paragraph for spell checking on load
// par.requestSpellCheck();
}
class TextCompletionList : public CompletionList
{
public:
///
TextCompletionList(Cursor const & cur, WordList const * list)
: buffer_(cur.buffer()), list_(list)
{}
///
virtual ~TextCompletionList() {}
///
virtual bool sorted() const { return true; }
///
virtual size_t size() const
{
return list_->size();
}
///
virtual docstring const & data(size_t idx) const
{
return list_->word(idx);
}
private:
///
Buffer const * buffer_;
///
WordList const * list_;
};
bool Text::empty() const
{
return pars_.empty() || (pars_.size() == 1 && pars_[0].empty()
// FIXME: Should we consider the labeled type as empty too?
&& pars_[0].layout().labeltype == LABEL_NO_LABEL);
}
double Text::spacing(Paragraph const & par) const
{
if (par.params().spacing().isDefault())
return owner_->buffer().params().spacing().getValue();
return par.params().spacing().getValue();
}
/**
* This breaks a paragraph at the specified position.
* The new paragraph will:
* - Decrease depth by one (or change layout to default layout) when
* keep_layout == false
* - keep current depth and layout when keep_layout == true
*/
static void breakParagraph(Text & text, pit_type par_offset, pos_type pos,
bool keep_layout)
{
BufferParams const & bparams = text.inset().buffer().params();
ParagraphList & pars = text.paragraphs();
// create a new paragraph, and insert into the list
ParagraphList::iterator tmp =
pars.insert(boost::next(pars.begin(), par_offset + 1),
Paragraph());
Paragraph & par = pars[par_offset];
// remember to set the inset_owner
tmp->setInsetOwner(&par.inInset());
// without doing that we get a crash when typing <Return> at the
// end of a paragraph
tmp->setPlainOrDefaultLayout(bparams.documentClass());
if (keep_layout) {
tmp->setLayout(par.layout());
tmp->setLabelWidthString(par.params().labelWidthString());
tmp->params().depth(par.params().depth());
} else if (par.params().depth() > 0) {
Paragraph const & hook = pars[text.outerHook(par_offset)];
tmp->setLayout(hook.layout());
// not sure the line below is useful
tmp->setLabelWidthString(par.params().labelWidthString());
tmp->params().depth(hook.params().depth());
}
bool const isempty = (par.allowEmpty() && par.empty());
if (!isempty && (par.size() > pos || par.empty())) {
tmp->setLayout(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());
// move 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 = 0; i <= pos_end; ++i) {
if (moveItem(par, pos, *tmp, j, bparams)) {
++j;
}
}
}
// Move over the end-of-par change information
tmp->setChange(tmp->size(), par.lookupChange(par.size()));
par.setChange(par.size(), Change(bparams.track_changes ?
Change::INSERTED : Change::UNCHANGED));
if (pos) {
// Make sure that we keep the language when
// breaking paragraph.
if (tmp->empty()) {
Font changed = tmp->getFirstFontSettings(bparams);
Font const & old = par.getFontSettings(bparams, par.size());
changed.setLanguage(old.language());
tmp->setFont(0, changed);
}
return;
}
if (!isempty) {
bool const soa = par.params().startOfAppendix();
par.params().clear();
// do not lose start of appendix marker (bug 4212)
par.params().startOfAppendix(soa);
par.setPlainOrDefaultLayout(bparams.documentClass());
}
if (keep_layout) {
par.setLayout(tmp->layout());
par.setLabelWidthString(tmp->params().labelWidthString());
par.params().depth(tmp->params().depth());
}
}
void Text::breakParagraph(Cursor & cur, bool inverse_logic)
{
LBUFERR(this == cur.text());
Paragraph & cpar = cur.paragraph();
pit_type cpit = cur.pit();
DocumentClass const & tclass = cur.buffer()->params().documentClass();
Layout const & layout = cpar.layout();
if (cur.lastpos() == 0 && !cpar.allowEmpty()) {
if (changeDepthAllowed(cur, DEC_DEPTH))
changeDepth(cur, DEC_DEPTH);
else {
docstring const & lay = cur.paragraph().usePlainLayout()
? tclass.plainLayoutName() : tclass.defaultLayoutName();
setLayout(cur, lay);
}
return;
}
cur.recordUndo();
// Always break behind a space
// It is better to erase the space (Dekel)
if (cur.pos() != cur.lastpos() && cpar.isLineSeparator(cur.pos()))
cpar.eraseChar(cur.pos(), cur.buffer()->params().track_changes);
// What should the layout for the new paragraph be?
bool keep_layout = layout.isEnvironment()
|| (layout.isParagraph() && layout.parbreak_is_newline);
if (inverse_logic)
keep_layout = !keep_layout;
// We need to remember this before we break the paragraph, because
// that invalidates the layout variable
bool sensitive = layout.labeltype == LABEL_SENSITIVE;
// we need to set this before we insert the paragraph.
bool const isempty = cpar.allowEmpty() && cpar.empty();
lyx::breakParagraph(*this, cpit, cur.pos(), keep_layout);
// After this, neither paragraph contains any rows!
cpit = cur.pit();
pit_type next_par = cpit + 1;
// well this is the caption hack since one caption is really enough
if (sensitive) {
if (cur.pos() == 0)
// set to standard-layout
//FIXME Check if this should be plainLayout() in some cases
pars_[cpit].applyLayout(tclass.defaultLayout());
else
// set to standard-layout
//FIXME Check if this should be plainLayout() in some cases
pars_[next_par].applyLayout(tclass.defaultLayout());
}
while (!pars_[next_par].empty() && pars_[next_par].isNewline(0)) {
if (!pars_[next_par].eraseChar(0, cur.buffer()->params().track_changes))
break; // the character couldn't be deleted physically due to change tracking
}
// A singlePar update is not enough in this case.
cur.screenUpdateFlags(Update::Force);
cur.forceBufferUpdate();
// This check is necessary. Otherwise the new empty paragraph will
// be deleted automatically. And it is more friendly for the user!
if (cur.pos() != 0 || isempty)
setCursor(cur, cur.pit() + 1, 0);
else
setCursor(cur, cur.pit(), 0);
}
// needed to insert the selection
void Text::insertStringAsLines(Cursor & cur, docstring const & str,
Font const & font)
{
BufferParams const & bparams = owner_->buffer().params();
pit_type pit = cur.pit();
pos_type pos = cur.pos();
// insert the string, don't insert doublespace
bool space_inserted = true;
for (docstring::const_iterator cit = str.begin();
cit != str.end(); ++cit) {
Paragraph & par = pars_[pit];
if (*cit == '\n') {
if (autoBreakRows_ && (!par.empty() || par.allowEmpty())) {
lyx::breakParagraph(*this, pit, pos,
par.layout().isEnvironment());
++pit;
pos = 0;
space_inserted = true;
} else {
continue;
}
// do not insert consecutive spaces if !free_spacing
} else if ((*cit == ' ' || *cit == '\t') &&
space_inserted && !par.isFreeSpacing()) {
continue;
} else if (*cit == '\t') {
if (!par.isFreeSpacing()) {
// tabs are like spaces here
par.insertChar(pos, ' ', font, bparams.track_changes);
++pos;
space_inserted = true;
} else {
par.insertChar(pos, *cit, font, bparams.track_changes);
++pos;
space_inserted = true;
}
} else if (!isPrintable(*cit)) {
// Ignore unprintables
continue;
} else {
// just insert the character
par.insertChar(pos, *cit, font, bparams.track_changes);
++pos;
space_inserted = (*cit == ' ');
}
}
setCursor(cur, pit, pos);
}
// turn double CR to single CR, others are converted into one
// blank. Then insertStringAsLines is called
void Text::insertStringAsParagraphs(Cursor & cur, docstring const & str,
Font const & font)
{
docstring linestr = str;
bool newline_inserted = false;
for (string::size_type i = 0, siz = linestr.size(); i < siz; ++i) {
if (linestr[i] == '\n') {
if (newline_inserted) {
// we know that \r will be ignored by
// insertStringAsLines. Of course, it is a dirty
// trick, but it works...
linestr[i - 1] = '\r';
linestr[i] = '\n';
} else {
linestr[i] = ' ';
newline_inserted = true;
}
} else if (isPrintable(linestr[i])) {
newline_inserted = false;
}
}
insertStringAsLines(cur, linestr, font);
}
// insert a character, moves all the following breaks in the
// same Paragraph one to the right and make a rebreak
void Text::insertChar(Cursor & cur, char_type c)
{
LBUFERR(this == cur.text());
cur.recordUndo(INSERT_UNDO);
TextMetrics const & tm = cur.bv().textMetrics(this);
Buffer const & buffer = *cur.buffer();
Paragraph & par = cur.paragraph();
// try to remove this
pit_type const pit = cur.pit();
bool const freeSpacing = par.layout().free_spacing ||
par.isFreeSpacing();
if (lyxrc.auto_number) {
static docstring const number_operators = from_ascii("+-/*");
static docstring const number_unary_operators = from_ascii("+-");
static docstring const number_seperators = from_ascii(".,:");
if (cur.current_font.fontInfo().number() == FONT_ON) {
if (!isDigitASCII(c) && !contains(number_operators, c) &&
!(contains(number_seperators, c) &&
cur.pos() != 0 &&
cur.pos() != cur.lastpos() &&
tm.displayFont(pit, cur.pos()).fontInfo().number() == FONT_ON &&
tm.displayFont(pit, cur.pos() - 1).fontInfo().number() == FONT_ON)
)
number(cur); // Set current_font.number to OFF
} else if (isDigitASCII(c) &&
cur.real_current_font.isVisibleRightToLeft()) {
number(cur); // Set current_font.number to ON
if (cur.pos() != 0) {
char_type const c = par.getChar(cur.pos() - 1);
if (contains(number_unary_operators, c) &&
(cur.pos() == 1
|| par.isSeparator(cur.pos() - 2)
|| par.isEnvSeparator(cur.pos() - 2)
|| par.isNewline(cur.pos() - 2))
) {
setCharFont(pit, cur.pos() - 1, cur.current_font,
tm.font_);
} else if (contains(number_seperators, c)
&& cur.pos() >= 2
&& tm.displayFont(pit, cur.pos() - 2).fontInfo().number() == FONT_ON) {
setCharFont(pit, cur.pos() - 1, cur.current_font,
tm.font_);
}
}
}
}
// In Bidi text, we want spaces to be treated in a special way: spaces
// which are between words in different languages should get the
// paragraph's language; otherwise, spaces should keep the language
// they were originally typed in. This is only in effect while typing;
// after the text is already typed in, the user can always go back and
// explicitly set the language of a space as desired. But 99.9% of the
// time, what we're doing here is what the user actually meant.
//
// The following cases are the ones in which the language of the space
// should be changed to match that of the containing paragraph. In the
// depictions, lowercase is LTR, uppercase is RTL, underscore (_)
// represents a space, pipe (|) represents the cursor position (so the
// character before it is the one just typed in). The different cases
// are depicted logically (not visually), from left to right:
//
// 1. A_a|
// 2. a_A|
//
// Theoretically, there are other situations that we should, perhaps, deal
// with (e.g.: a|_A, A|_a). In practice, though, there really isn't any
// point (to understand why, just try to create this situation...).
if ((cur.pos() >= 2) && (par.isLineSeparator(cur.pos() - 1))) {
// get font in front and behind the space in question. But do NOT
// use getFont(cur.pos()) because the character c is not inserted yet
Font const pre_space_font = tm.displayFont(cur.pit(), cur.pos() - 2);
Font const & post_space_font = cur.real_current_font;
bool pre_space_rtl = pre_space_font.isVisibleRightToLeft();
bool post_space_rtl = post_space_font.isVisibleRightToLeft();
if (pre_space_rtl != post_space_rtl) {
// Set the space's language to match the language of the
// adjacent character whose direction is the paragraph's
// direction; don't touch other properties of the font
Language const * lang =
(pre_space_rtl == par.isRTL(buffer.params())) ?
pre_space_font.language() : post_space_font.language();
Font space_font = tm.displayFont(cur.pit(), cur.pos() - 1);
space_font.setLanguage(lang);
par.setFont(cur.pos() - 1, space_font);
}
}
// Next check, if there will be two blanks together or a blank at
// the beginning of a paragraph.
// I decided to handle blanks like normal characters, the main
// difference are the special checks when calculating the row.fill
// (blank does not count at the end of a row) and the check here
// When the free-spacing option is set for the current layout,
// disable the double-space checking
if (!freeSpacing && isLineSeparatorChar(c)) {
if (cur.pos() == 0) {
cur.message(_(
"You cannot insert a space at the "
"beginning of a paragraph. Please read the Tutorial."));
return;
}
// LASSERT: Is it safe to continue here?
LASSERT(cur.pos() > 0, /**/);
if ((par.isLineSeparator(cur.pos() - 1) || par.isNewline(cur.pos() - 1))
&& !par.isDeleted(cur.pos() - 1)) {
cur.message(_(
"You cannot type two spaces this way. "
"Please read the Tutorial."));
return;
}
}
// Prevent to insert uncodable characters in verbatim and ERT
// (workaround for bug 9012)
// Don't do it for listings inset, since InsetListings::latex() tries
// to switch to a usable encoding which works in many cases (bug 9102).
if (cur.paragraph().isPassThru() && owner_->lyxCode() != LISTINGS_CODE &&
cur.current_font.language()) {
Encoding const * e = cur.current_font.language()->encoding();
if (!e->encodable(c)) {
cur.message(_("Character is uncodable in verbatim paragraphs."));
return;
}
}
pos_type pos = cur.pos();
if (!cur.paragraph().isPassThru() && owner_->lyxCode() != IPA_CODE &&
cur.current_font.fontInfo().family() != TYPEWRITER_FAMILY &&
c == '-' && pos > 0) {
if (par.getChar(pos - 1) == '-') {
// convert "--" to endash
par.eraseChar(pos - 1, cur.buffer()->params().track_changes);
c = 0x2013;
pos--;
} else if (par.getChar(pos - 1) == 0x2013) {
// convert "---" to emdash
par.eraseChar(pos - 1, cur.buffer()->params().track_changes);
c = 0x2014;
pos--;
} else if (par.getChar(pos - 1) == 0x2014) {
// convert "----" to "-"
par.eraseChar(pos - 1, cur.buffer()->params().track_changes);
c = '-';
pos--;
}
}
par.insertChar(pos, c, cur.current_font,
cur.buffer()->params().track_changes);
cur.checkBufferStructure();
// cur.screenUpdateFlags(Update::Force);
bool boundary = cur.boundary()
|| tm.isRTLBoundary(cur.pit(), pos + 1);
setCursor(cur, cur.pit(), pos + 1, false, boundary);
charInserted(cur);
}
void Text::charInserted(Cursor & cur)
{
Paragraph & par = cur.paragraph();
// register word if a non-letter was entered
if (cur.pos() > 1
&& !par.isWordSeparator(cur.pos() - 2)
&& par.isWordSeparator(cur.pos() - 1)) {
// get the word in front of cursor
LBUFERR(this == cur.text());
cur.paragraph().updateWords();
}
}
// the cursor set functions have a special mechanism. When they
// realize, that you left an empty paragraph, they will delete it.
bool Text::cursorForwardOneWord(Cursor & cur)
{
LBUFERR(this == cur.text());
pos_type const lastpos = cur.lastpos();
pit_type pit = cur.pit();
pos_type pos = cur.pos();
Paragraph const & par = cur.paragraph();
// Paragraph boundary is a word boundary
if (pos == lastpos) {
if (pit != cur.lastpit())
return setCursor(cur, pit + 1, 0);
else
return false;
}
if (lyxrc.mac_like_cursor_movement) {
// Skip through trailing punctuation and spaces.
while (pos != lastpos && (par.isChar(pos) || par.isSpace(pos)))
++pos;
// Skip over either a non-char inset or a full word
if (pos != lastpos && par.isWordSeparator(pos))
++pos;
else while (pos != lastpos && !par.isWordSeparator(pos))
++pos;
} else {
LASSERT(pos < lastpos, return false); // see above
if (!par.isWordSeparator(pos))
while (pos != lastpos && !par.isWordSeparator(pos))
++pos;
else if (par.isChar(pos))
while (pos != lastpos && par.isChar(pos))
++pos;
else if (!par.isSpace(pos)) // non-char inset
++pos;
// Skip over white space
while (pos != lastpos && par.isSpace(pos))
++pos;
}
return setCursor(cur, pit, pos);
}
bool Text::cursorBackwardOneWord(Cursor & cur)
{
LBUFERR(this == cur.text());
pit_type pit = cur.pit();
pos_type pos = cur.pos();
Paragraph & par = cur.paragraph();
// Paragraph boundary is a word boundary
if (pos == 0 && pit != 0)
return setCursor(cur, pit - 1, getPar(pit - 1).size());
if (lyxrc.mac_like_cursor_movement) {
// Skip through punctuation and spaces.
while (pos != 0 && (par.isChar(pos - 1) || par.isSpace(pos - 1)))
--pos;
// Skip over either a non-char inset or a full word
if (pos != 0 && par.isWordSeparator(pos - 1) && !par.isChar(pos - 1))
--pos;
else while (pos != 0 && !par.isWordSeparator(pos - 1))
--pos;
} else {
// Skip over white space
while (pos != 0 && par.isSpace(pos - 1))
--pos;
if (pos != 0 && !par.isWordSeparator(pos - 1))
while (pos != 0 && !par.isWordSeparator(pos - 1))
--pos;
else if (pos != 0 && par.isChar(pos - 1))
while (pos != 0 && par.isChar(pos - 1))
--pos;
else if (pos != 0 && !par.isSpace(pos - 1)) // non-char inset
--pos;
}
return setCursor(cur, pit, pos);
}
bool Text::cursorVisLeftOneWord(Cursor & cur)
{
LBUFERR(this == cur.text());
pos_type left_pos, right_pos;
bool left_is_letter, right_is_letter;
Cursor temp_cur = cur;
// always try to move at least once...
while (temp_cur.posVisLeft(true /* skip_inset */)) {
// collect some information about current cursor position
temp_cur.getSurroundingPos(left_pos, right_pos);
left_is_letter =
(left_pos > -1 ? !temp_cur.paragraph().isWordSeparator(left_pos) : false);
right_is_letter =
(right_pos > -1 ? !temp_cur.paragraph().isWordSeparator(right_pos) : false);
// if we're not at a letter/non-letter boundary, continue moving
if (left_is_letter == right_is_letter)
continue;
// we should stop when we have an LTR word on our right or an RTL word
// on our left
if ((left_is_letter && temp_cur.paragraph().getFontSettings(
temp_cur.buffer()->params(), left_pos).isRightToLeft())
|| (right_is_letter && !temp_cur.paragraph().getFontSettings(
temp_cur.buffer()->params(), right_pos).isRightToLeft()))
break;
}
return setCursor(cur, temp_cur.pit(), temp_cur.pos(),
true, temp_cur.boundary());
}
bool Text::cursorVisRightOneWord(Cursor & cur)
{
LBUFERR(this == cur.text());
pos_type left_pos, right_pos;
bool left_is_letter, right_is_letter;
Cursor temp_cur = cur;
// always try to move at least once...
while (temp_cur.posVisRight(true /* skip_inset */)) {
// collect some information about current cursor position
temp_cur.getSurroundingPos(left_pos, right_pos);
left_is_letter =
(left_pos > -1 ? !temp_cur.paragraph().isWordSeparator(left_pos) : false);
right_is_letter =
(right_pos > -1 ? !temp_cur.paragraph().isWordSeparator(right_pos) : false);
// if we're not at a letter/non-letter boundary, continue moving
if (left_is_letter == right_is_letter)
continue;
// we should stop when we have an LTR word on our right or an RTL word
// on our left
if ((left_is_letter && temp_cur.paragraph().getFontSettings(
temp_cur.buffer()->params(),
left_pos).isRightToLeft())
|| (right_is_letter && !temp_cur.paragraph().getFontSettings(
temp_cur.buffer()->params(),
right_pos).isRightToLeft()))
break;
}
return setCursor(cur, temp_cur.pit(), temp_cur.pos(),
true, temp_cur.boundary());
}
void Text::selectWord(Cursor & cur, word_location loc)
{
LBUFERR(this == cur.text());
CursorSlice from = cur.top();
CursorSlice to = cur.top();
getWord(from, to, loc);
if (cur.top() != from)
setCursor(cur, from.pit(), from.pos());
if (to == from)
return;
if (!cur.selection())
cur.resetAnchor();
setCursor(cur, to.pit(), to.pos());
cur.setSelection();
cur.setWordSelection(true);
}
void Text::selectAll(Cursor & cur)
{
LBUFERR(this == cur.text());
if (cur.lastpos() == 0 && cur.lastpit() == 0)
return;
// If the cursor is at the beginning, make sure the cursor ends there
if (cur.pit() == 0 && cur.pos() == 0) {
setCursor(cur, cur.lastpit(), getPar(cur.lastpit()).size());
cur.resetAnchor();
setCursor(cur, 0, 0);
} else {
setCursor(cur, 0, 0);
cur.resetAnchor();
setCursor(cur, cur.lastpit(), getPar(cur.lastpit()).size());
}
cur.setSelection();
}
// Select the word currently under the cursor when no
// selection is currently set
bool Text::selectWordWhenUnderCursor(Cursor & cur, word_location loc)
{
LBUFERR(this == cur.text());
if (cur.selection())
return false;
selectWord(cur, loc);
return cur.selection();
}
void Text::acceptOrRejectChanges(Cursor & cur, ChangeOp op)
{
LBUFERR(this == cur.text());
if (!cur.selection()) {
if (!selectChange(cur))
return;
}
cur.recordUndoSelection();
pit_type begPit = cur.selectionBegin().pit();
pit_type endPit = cur.selectionEnd().pit();
pos_type begPos = cur.selectionBegin().pos();
pos_type endPos = cur.selectionEnd().pos();
// keep selection info, because endPos becomes invalid after the first loop
bool endsBeforeEndOfPar = (endPos < pars_[endPit].size());
// first, accept/reject changes within each individual paragraph (do not consider end-of-par)
for (pit_type pit = begPit; pit <= endPit; ++pit) {
pos_type parSize = pars_[pit].size();
// ignore empty paragraphs; otherwise, an assertion will fail for
// acceptChanges(bparams, 0, 0) or rejectChanges(bparams, 0, 0)
if (parSize == 0)
continue;
// do not consider first paragraph if the cursor starts at pos size()
if (pit == begPit && begPos == parSize)
continue;
// do not consider last paragraph if the cursor ends at pos 0
if (pit == endPit && endPos == 0)
break; // last iteration anyway
pos_type left = (pit == begPit ? begPos : 0);
pos_type right = (pit == endPit ? endPos : parSize);
if (left == right)
// there is no change here
continue;
if (op == ACCEPT) {
pars_[pit].acceptChanges(left, right);
} else {
pars_[pit].rejectChanges(left, right);
}
}
// next, accept/reject imaginary end-of-par characters
for (pit_type pit = begPit; pit <= endPit; ++pit) {
pos_type pos = pars_[pit].size();
// skip if the selection ends before the end-of-par
if (pit == endPit && endsBeforeEndOfPar)
break; // last iteration anyway
// skip if this is not the last paragraph of the document
// note: the user should be able to accept/reject the par break of the last par!
if (pit == endPit && pit + 1 != int(pars_.size()))
break; // last iteration anway
if (op == ACCEPT) {
if (pars_[pit].isInserted(pos)) {
pars_[pit].setChange(pos, Change(Change::UNCHANGED));
} else if (pars_[pit].isDeleted(pos)) {
if (pit + 1 == int(pars_.size())) {
// we cannot remove a par break at the end of the last paragraph;
// instead, we mark it unchanged
pars_[pit].setChange(pos, Change(Change::UNCHANGED));
} else {
mergeParagraph(cur.buffer()->params(), pars_, pit);
--endPit;
--pit;
}
}
} else {
if (pars_[pit].isDeleted(pos)) {
pars_[pit].setChange(pos, Change(Change::UNCHANGED));
} else if (pars_[pit].isInserted(pos)) {
if (pit + 1 == int(pars_.size())) {
// we mark the par break at the end of the last paragraph unchanged
pars_[pit].setChange(pos, Change(Change::UNCHANGED));
} else {
mergeParagraph(cur.buffer()->params(), pars_, pit);
--endPit;
--pit;
}
}
}
}
// finally, invoke the DEPM
deleteEmptyParagraphMechanism(begPit, endPit, cur.buffer()->params().track_changes);
cur.finishUndo();
cur.clearSelection();
setCursorIntern(cur, begPit, begPos);
cur.screenUpdateFlags(Update::Force);
cur.forceBufferUpdate();
}
void Text::acceptChanges()
{
BufferParams const & bparams = owner_->buffer().params();
lyx::acceptChanges(pars_, bparams);
deleteEmptyParagraphMechanism(0, pars_.size() - 1, bparams.track_changes);
}
void Text::rejectChanges()
{
BufferParams const & bparams = owner_->buffer().params();
pit_type pars_size = static_cast<pit_type>(pars_.size());
// first, reject changes within each individual paragraph
// (do not consider end-of-par)
for (pit_type pit = 0; pit < pars_size; ++pit) {
if (!pars_[pit].empty()) // prevent assertion failure
pars_[pit].rejectChanges(0, pars_[pit].size());
}
// next, reject imaginary end-of-par characters
for (pit_type pit = 0; pit < pars_size; ++pit) {
pos_type pos = pars_[pit].size();
if (pars_[pit].isDeleted(pos)) {
pars_[pit].setChange(pos, Change(Change::UNCHANGED));
} else if (pars_[pit].isInserted(pos)) {
if (pit == pars_size - 1) {
// we mark the par break at the end of the last
// paragraph unchanged
pars_[pit].setChange(pos, Change(Change::UNCHANGED));
} else {
mergeParagraph(bparams, pars_, pit);
--pit;
--pars_size;
}
}
}
// finally, invoke the DEPM
deleteEmptyParagraphMechanism(0, pars_size - 1, bparams.track_changes);
}
void Text::deleteWordForward(Cursor & cur)
{
LBUFERR(this == cur.text());
if (cur.lastpos() == 0)
cursorForward(cur);
else {
cur.resetAnchor();
cur.setSelection(true);
cursorForwardOneWord(cur);
cur.setSelection();
cutSelection(cur, true, false);
cur.checkBufferStructure();
}
}
void Text::deleteWordBackward(Cursor & cur)
{
LBUFERR(this == cur.text());
if (cur.lastpos() == 0)
cursorBackward(cur);
else {
cur.resetAnchor();
cur.setSelection(true);
cursorBackwardOneWord(cur);
cur.setSelection();
cutSelection(cur, true, false);
cur.checkBufferStructure();
}
}
// Kill to end of line.
void Text::changeCase(Cursor & cur, TextCase action)
{
LBUFERR(this == cur.text());
CursorSlice from;
CursorSlice to;
bool gotsel = false;
if (cur.selection()) {
from = cur.selBegin();
to = cur.selEnd();
gotsel = true;
} else {
from = cur.top();
getWord(from, to, PARTIAL_WORD);
cursorForwardOneWord(cur);
}
cur.recordUndoSelection();
pit_type begPit = from.pit();
pit_type endPit = to.pit();
pos_type begPos = from.pos();
pos_type endPos = to.pos();
pos_type right = 0; // needed after the for loop
for (pit_type pit = begPit; pit <= endPit; ++pit) {
Paragraph & par = pars_[pit];
pos_type const pos = (pit == begPit ? begPos : 0);
right = (pit == endPit ? endPos : par.size());
par.changeCase(cur.buffer()->params(), pos, right, action);
}
// the selection may have changed due to logically-only deleted chars
if (gotsel) {
setCursor(cur, begPit, begPos);
cur.resetAnchor();
setCursor(cur, endPit, right);
cur.setSelection();
} else
setCursor(cur, endPit, right);
cur.checkBufferStructure();
}
bool Text::handleBibitems(Cursor & cur)
{
if (cur.paragraph().layout().labeltype != LABEL_BIBLIO)
return false;
if (cur.pos() != 0)
return false;
BufferParams const & bufparams = cur.buffer()->params();
Paragraph const & par = cur.paragraph();
Cursor prevcur = cur;
if (cur.pit() > 0) {
--prevcur.pit();
prevcur.pos() = prevcur.lastpos();
}
Paragraph const & prevpar = prevcur.paragraph();
// if a bibitem is deleted, merge with previous paragraph
// if this is a bibliography item as well
if (cur.pit() > 0 && par.layout() == prevpar.layout()) {
cur.recordUndo(ATOMIC_UNDO, prevcur.pit());
mergeParagraph(bufparams, cur.text()->paragraphs(),
prevcur.pit());
cur.forceBufferUpdate();
setCursorIntern(cur, prevcur.pit(), prevcur.pos());
cur.screenUpdateFlags(Update::Force);
return true;
}
// otherwise reset to default
cur.paragraph().setPlainOrDefaultLayout(bufparams.documentClass());
return true;
}
bool Text::erase(Cursor & cur)
{
LASSERT(this == cur.text(), return false);
bool needsUpdate = false;
Paragraph & par = cur.paragraph();
if (cur.pos() != cur.lastpos()) {
// this is the code for a normal delete, not pasting
// any paragraphs
cur.recordUndo(DELETE_UNDO);
bool const was_inset = cur.paragraph().isInset(cur.pos());
if(!par.eraseChar(cur.pos(), cur.buffer()->params().track_changes))
// the character has been logically deleted only => skip it
cur.top().forwardPos();
if (was_inset)
cur.forceBufferUpdate();
else
cur.checkBufferStructure();
needsUpdate = true;
} else {
if (cur.pit() == cur.lastpit())
return dissolveInset(cur);
if (!par.isMergedOnEndOfParDeletion(cur.buffer()->params().track_changes)) {
par.setChange(cur.pos(), Change(Change::DELETED));
cur.forwardPos();
needsUpdate = true;
} else {
setCursorIntern(cur, cur.pit() + 1, 0);
needsUpdate = backspacePos0(cur);
}
}
needsUpdate |= handleBibitems(cur);
if (needsUpdate) {
// Make sure the cursor is correct. Is this really needed?
// No, not really... at least not here!
cur.text()->setCursor(cur.top(), cur.pit(), cur.pos());
cur.checkBufferStructure();
}
return needsUpdate;
}
bool Text::backspacePos0(Cursor & cur)
{
LBUFERR(this == cur.text());
if (cur.pit() == 0)
return false;
bool needsUpdate = false;
BufferParams const & bufparams = cur.buffer()->params();
DocumentClass const & tclass = bufparams.documentClass();
ParagraphList & plist = cur.text()->paragraphs();
Paragraph const & par = cur.paragraph();
Cursor prevcur = cur;
--prevcur.pit();
prevcur.pos() = prevcur.lastpos();
Paragraph const & prevpar = prevcur.paragraph();
// is it an empty paragraph?
if (cur.lastpos() == 0
|| (cur.lastpos() == 1 && par.isSeparator(0))) {
cur.recordUndo(ATOMIC_UNDO, prevcur.pit(), cur.pit());
plist.erase(boost::next(plist.begin(), cur.pit()));
needsUpdate = true;
}
// is previous par empty?
else if (prevcur.lastpos() == 0
|| (prevcur.lastpos() == 1 && prevpar.isSeparator(0))) {
cur.recordUndo(ATOMIC_UNDO, prevcur.pit(), cur.pit());
plist.erase(boost::next(plist.begin(), prevcur.pit()));
needsUpdate = true;
}
// Pasting is not allowed, if the paragraphs have different
// layouts. I think it is a real bug of all other
// word processors to allow it. It confuses the user.
// Correction: Pasting is always allowed with standard-layout
// or the empty layout.
else if (par.layout() == prevpar.layout()
|| tclass.isDefaultLayout(par.layout())
|| tclass.isPlainLayout(par.layout())) {
cur.recordUndo(ATOMIC_UNDO, prevcur.pit());
mergeParagraph(bufparams, plist, prevcur.pit());
needsUpdate = true;
}
if (needsUpdate) {
cur.forceBufferUpdate();
setCursorIntern(cur, prevcur.pit(), prevcur.pos());
}
return needsUpdate;
}
bool Text::backspace(Cursor & cur)
{
LBUFERR(this == cur.text());
bool needsUpdate = false;
if (cur.pos() == 0) {
if (cur.pit() == 0)
return dissolveInset(cur);
Cursor prev_cur = cur;
--prev_cur.pit();
if (!prev_cur.paragraph().isMergedOnEndOfParDeletion(cur.buffer()->params().track_changes)) {
cur.recordUndo(ATOMIC_UNDO, prev_cur.pit(), prev_cur.pit());
prev_cur.paragraph().setChange(prev_cur.lastpos(), Change(Change::DELETED));
setCursorIntern(cur, prev_cur.pit(), prev_cur.lastpos());
return true;
}
// The cursor is at the beginning of a paragraph, so
// the backspace will collapse two paragraphs into one.
needsUpdate = backspacePos0(cur);
} else {
// this is the code for a normal backspace, not pasting
// any paragraphs
cur.recordUndo(DELETE_UNDO);
// We used to do cursorBackwardIntern() here, but it is
// not a good idea since it triggers the auto-delete
// mechanism. So we do a cursorBackwardIntern()-lite,
// without the dreaded mechanism. (JMarc)
setCursorIntern(cur, cur.pit(), cur.pos() - 1,
false, cur.boundary());
bool const was_inset = cur.paragraph().isInset(cur.pos());
cur.paragraph().eraseChar(cur.pos(), cur.buffer()->params().track_changes);
if (was_inset)
cur.forceBufferUpdate();
else
cur.checkBufferStructure();
}
if (cur.pos() == cur.lastpos())
cur.setCurrentFont();
needsUpdate |= handleBibitems(cur);
// A singlePar update is not enough in this case.
// cur.screenUpdateFlags(Update::Force);
setCursor(cur.top(), cur.pit(), cur.pos());
return needsUpdate;
}
bool Text::dissolveInset(Cursor & cur)
{
LASSERT(this == cur.text(), return false);
if (isMainText() || cur.inset().nargs() != 1)
return false;
cur.recordUndoInset();
cur.setMark(false);
cur.selHandle(false);
// save position
pos_type spos = cur.pos();
pit_type spit = cur.pit();
ParagraphList plist;
if (cur.lastpit() != 0 || cur.lastpos() != 0)
plist = paragraphs();
cur.popBackward();
// store cursor offset
if (spit == 0)
spos += cur.pos();
spit += cur.pit();
Buffer & b = *cur.buffer();
cur.paragraph().eraseChar(cur.pos(), b.params().track_changes);
if (!plist.empty()) {
// see bug 7319
// we clear the cache so that we won't get conflicts with labels
// that get pasted into the buffer. we should update this before
// its being empty matters. if not (i.e., if we encounter bugs),
// then this should instead be:
// cur.buffer().updateBuffer();
// but we'll try the cheaper solution here.
cur.buffer()->clearReferenceCache();
// ERT paragraphs have the Language latex_language.
// This is invalid outside of ERT, so we need to
// change it to the buffer language.
ParagraphList::iterator it = plist.begin();
ParagraphList::iterator it_end = plist.end();
for (; it != it_end; ++it)
it->changeLanguage(b.params(), latex_language, b.language());
pasteParagraphList(cur, plist, b.params().documentClassPtr(),
b.errorList("Paste"));
// restore position
cur.pit() = min(cur.lastpit(), spit);
cur.pos() = min(cur.lastpos(), spos);
}
cur.forceBufferUpdate();
// Ensure the current language is set correctly (bug 6292)
cur.text()->setCursor(cur, cur.pit(), cur.pos());
cur.clearSelection();
cur.resetAnchor();
return true;
}
void Text::getWord(CursorSlice & from, CursorSlice & to,
word_location const loc) const
{
to = from;
pars_[to.pit()].locateWord(from.pos(), to.pos(), loc);
}
void Text::write(ostream & os) const
{
Buffer const & buf = owner_->buffer();
ParagraphList::const_iterator pit = paragraphs().begin();
ParagraphList::const_iterator end = paragraphs().end();
depth_type dth = 0;
for (; pit != end; ++pit)
pit->write(os, buf.params(), dth);
// Close begin_deeper
for(; dth > 0; --dth)
os << "\n\\end_deeper";
}
bool Text::read(Lexer & lex,
ErrorList & errorList, InsetText * insetPtr)
{
Buffer const & buf = owner_->buffer();
depth_type depth = 0;
bool res = true;
while (lex.isOK()) {
lex.nextToken();
string const token = lex.getString();
if (token.empty())
continue;
if (token == "\\end_inset")
break;
if (token == "\\end_body")
continue;
if (token == "\\begin_body")
continue;
if (token == "\\end_document") {
res = false;
break;
}
if (token == "\\begin_layout") {
lex.pushToken(token);
Paragraph par;
par.setInsetOwner(insetPtr);
par.params().depth(depth);
par.setFont(0, Font(inherit_font, buf.params().language));
pars_.push_back(par);
readParagraph(pars_.back(), lex, errorList);
// register the words in the global word list
pars_.back().updateWords();
} else if (token == "\\begin_deeper") {
++depth;
} else if (token == "\\end_deeper") {
if (!depth)
lex.printError("\\end_deeper: " "depth is already null");
else
--depth;
} else {
LYXERR0("Handling unknown body token: `" << token << '\'');
}
}
// avoid a crash on weird documents (bug 4859)
if (pars_.empty()) {
Paragraph par;
par.setInsetOwner(insetPtr);
par.params().depth(depth);
par.setFont(0, Font(inherit_font,
buf.params().language));
par.setPlainOrDefaultLayout(buf.params().documentClass());
pars_.push_back(par);
}
return res;
}
// Returns the current font and depth as a message.
docstring Text::currentState(Cursor const & cur) const
{
LBUFERR(this == cur.text());
Buffer & buf = *cur.buffer();
Paragraph const & par = cur.paragraph();
odocstringstream os;
if (buf.params().track_changes)
os << _("[Change Tracking] ");
Change change = par.lookupChange(cur.pos());
if (change.changed()) {
Author const & a = buf.params().authors().get(change.author);
os << _("Change: ") << a.name();
if (!a.email().empty())
os << " (" << a.email() << ")";
// FIXME ctime is english, we should translate that
os << _(" at ") << ctime(&change.changetime);
os << " : ";
}
// I think we should only show changes from the default
// font. (Asger)
// No, from the document font (MV)
Font font = cur.real_current_font;
font.fontInfo().reduce(buf.params().getFont().fontInfo());
os << bformat(_("Font: %1$s"), font.stateText(&buf.params()));
// The paragraph depth
int depth = cur.paragraph().getDepth();
if (depth > 0)
os << bformat(_(", Depth: %1$d"), depth);
// The paragraph spacing, but only if different from
// buffer spacing.
Spacing const & spacing = par.params().spacing();
if (!spacing.isDefault()) {
os << _(", Spacing: ");
switch (spacing.getSpace()) {
case Spacing::Single:
os << _("Single");
break;
case Spacing::Onehalf:
os << _("OneHalf");
break;
case Spacing::Double:
os << _("Double");
break;
case Spacing::Other:
os << _("Other (") << from_ascii(spacing.getValueAsString()) << ')';
break;
case Spacing::Default:
// should never happen, do nothing
break;
}
}
#ifdef DEVEL_VERSION
os << _(", Inset: ") << &cur.inset();
os << _(", Paragraph: ") << cur.pit();
os << _(", Id: ") << par.id();
os << _(", Position: ") << cur.pos();
// FIXME: Why is the check for par.size() needed?
// We are called with cur.pos() == par.size() quite often.
if (!par.empty() && cur.pos() < par.size()) {
// Force output of code point, not character
size_t const c = par.getChar(cur.pos());
os << _(", Char: 0x") << hex << c;
}
os << _(", Boundary: ") << cur.boundary();
// Row & row = cur.textRow();
// os << bformat(_(", Row b:%1$d e:%2$d"), row.pos(), row.endpos());
#endif
return os.str();
}
docstring Text::getPossibleLabel(Cursor const & cur) const
{
pit_type pit = cur.pit();
Layout const * layout = &(pars_[pit].layout());
docstring text;
docstring par_text = pars_[pit].asString();
// The return string of math matrices might contain linebreaks
par_text = subst(par_text, '\n', '-');
int const numwords = 3;
for (int i = 0; i < numwords; ++i) {
if (par_text.empty())
break;
docstring head;
par_text = split(par_text, head, ' ');
// Is it legal to use spaces in labels ?
if (i > 0)
text += '-';
text += head;
}
// Make sure it isn't too long
unsigned int const max_label_length = 32;
if (text.size() > max_label_length)
text.resize(max_label_length);
// Will contain the label prefix.
docstring name;
// For section, subsection, etc...
if (layout->latextype == LATEX_PARAGRAPH && pit != 0) {
Layout const * layout2 = &(pars_[pit - 1].layout());
if (layout2->latextype != LATEX_PARAGRAPH) {
--pit;
layout = layout2;
}
}
if (layout->latextype != LATEX_PARAGRAPH)
name = layout->refprefix;
// For captions, we just take the caption type
Inset * caption_inset = cur.innerInsetOfType(CAPTION_CODE);
if (caption_inset) {
string const & ftype = static_cast<InsetCaption *>(caption_inset)->floattype();
FloatList const & fl = cur.buffer()->params().documentClass().floats();
if (fl.typeExist(ftype)) {
Floating const & flt = fl.getType(ftype);
name = from_utf8(flt.refPrefix());
}
if (name.empty())
name = from_utf8(ftype.substr(0,3));
}
// If none of the above worked, see if the inset knows.
if (name.empty()) {
InsetLayout const & il = cur.inset().getLayout();
name = il.refprefix();
}
if (!name.empty())
text = name + ':' + text;
// We need a unique label
docstring label = text;
int i = 1;
while (cur.buffer()->insetLabel(label)) {
label = text + '-' + convert<docstring>(i);
++i;
}
return label;
}
docstring Text::asString(int options) const
{
return asString(0, pars_.size(), options);
}
docstring Text::asString(pit_type beg, pit_type end, int options) const
{
size_t i = size_t(beg);
docstring str = pars_[i].asString(options);
for (++i; i != size_t(end); ++i) {
str += '\n';
str += pars_[i].asString(options);
}
return str;
}
void Text::forOutliner(docstring & os, size_t maxlen, bool shorten) const
{
if (maxlen == 0)
maxlen = std::numeric_limits<std::size_t>::max();
else
LASSERT(maxlen >= 8, maxlen = TOC_ENTRY_LENGTH);
for (size_t i = 0; i != pars_.size() && os.length() < maxlen; ++i)
pars_[i].forOutliner(os, maxlen);
if (shorten && os.length() >= maxlen)
os = os.substr(0, maxlen - 3) + from_ascii("...");
}
void Text::charsTranspose(Cursor & cur)
{
LBUFERR(this == cur.text());
pos_type pos = cur.pos();
// If cursor is at beginning or end of paragraph, do nothing.
if (pos == cur.lastpos() || pos == 0)
return;
Paragraph & par = cur.paragraph();
// Get the positions of the characters to be transposed.
pos_type pos1 = pos - 1;
pos_type pos2 = pos;
// In change tracking mode, ignore deleted characters.
while (pos2 < cur.lastpos() && par.isDeleted(pos2))
++pos2;
if (pos2 == cur.lastpos())
return;
while (pos1 >= 0 && par.isDeleted(pos1))
--pos1;
if (pos1 < 0)
return;
// Don't do anything if one of the "characters" is not regular text.
if (par.isInset(pos1) || par.isInset(pos2))
return;
// Store the characters to be transposed (including font information).
char_type const char1 = par.getChar(pos1);
Font const font1 =
par.getFontSettings(cur.buffer()->params(), pos1);
char_type const char2 = par.getChar(pos2);
Font const font2 =
par.getFontSettings(cur.buffer()->params(), pos2);
// And finally, we are ready to perform the transposition.
// Track the changes if Change Tracking is enabled.
bool const trackChanges = cur.buffer()->params().track_changes;
cur.recordUndo();
par.eraseChar(pos2, trackChanges);
par.eraseChar(pos1, trackChanges);
par.insertChar(pos1, char2, font2, trackChanges);
par.insertChar(pos2, char1, font1, trackChanges);
cur.checkBufferStructure();
// After the transposition, move cursor to after the transposition.
setCursor(cur, cur.pit(), pos2);
cur.forwardPos();
}
DocIterator Text::macrocontextPosition() const
{
return macrocontext_position_;
}
void Text::setMacrocontextPosition(DocIterator const & pos)
{
macrocontext_position_ = pos;
}
docstring Text::previousWord(CursorSlice const & sl) const
{
CursorSlice from = sl;
CursorSlice to = sl;
getWord(from, to, PREVIOUS_WORD);
if (sl == from || to == from)
return docstring();
Paragraph const & par = sl.paragraph();
return par.asString(from.pos(), to.pos());
}
bool Text::completionSupported(Cursor const & cur) const
{
Paragraph const & par = cur.paragraph();
return cur.pos() > 0
&& (cur.pos() >= par.size() || par.isWordSeparator(cur.pos()))
&& !par.isWordSeparator(cur.pos() - 1);
}
CompletionList const * Text::createCompletionList(Cursor const & cur) const
{
WordList const * list = theWordList(cur.getFont().language()->lang());
return new TextCompletionList(cur, list);
}
bool Text::insertCompletion(Cursor & cur, docstring const & s, bool /*finished*/)
{
LBUFERR(cur.bv().cursor() == cur);
cur.insert(s);
cur.bv().cursor() = cur;
if (!(cur.result().screenUpdate() & Update::Force))
cur.screenUpdateFlags(cur.result().screenUpdate() | Update::SinglePar);
return true;
}
docstring Text::completionPrefix(Cursor const & cur) const
{
return previousWord(cur.top());
}
} // namespace lyx
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