lyx_mirror/src/BufferView.C

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/**
* \file BufferView.C
* Copyright 1995-2002 the LyX Team
* Read the file COPYING
*
* \author unknown
* \author John Levon <moz@compsoc.man.ac.uk>
*/
#include <config.h>
#ifdef __GNUG__
#pragma implementation
#endif
#include "BufferView.h"
#include "BufferView_pimpl.h"
#include "BufferView_pimpl.h"
#include "LaTeX.h"
#include "WordLangTuple.h"
#include "buffer.h"
#include "bufferlist.h"
#include "debug.h"
#include "gettext.h"
#include "iterators.h"
#include "language.h"
#include "lyxcursor.h"
#include "lyxlex.h"
#include "lyxtext.h"
#include "undo_funcs.h"
#include "frontends/Alert.h"
#include "frontends/Dialogs.h"
#include "frontends/LyXView.h"
#include "frontends/WorkArea.h"
#include "frontends/screen.h"
#include "insets/insetcommand.h" // ChangeRefs
#include "insets/inseterror.h"
#include "support/FileInfo.h"
#include "support/filetools.h"
#include "support/lyxfunctional.h" // equal_1st_in_pair
#include "support/types.h"
#include "support/lyxalgo.h" // lyx_count
#include <fstream>
extern BufferList bufferlist;
using lyx::pos_type;
using std::pair;
using std::endl;
using std::ifstream;
using std::vector;
using std::find;
using std::count_if;
BufferView::BufferView(LyXView * owner, int xpos, int ypos,
int width, int height)
: pimpl_(new Pimpl(this, owner, xpos, ypos, width, height))
{
text = 0;
}
BufferView::~BufferView()
{
delete text;
delete pimpl_;
}
Buffer * BufferView::buffer() const
{
return pimpl_->buffer_;
}
LyXScreen & BufferView::screen() const
{
return pimpl_->screen();
}
LyXView * BufferView::owner() const
{
return pimpl_->owner_;
}
Painter & BufferView::painter() const
{
return pimpl_->painter();
}
void BufferView::buffer(Buffer * b)
{
pimpl_->buffer(b);
}
void BufferView::resize()
{
if (pimpl_->buffer_) {
pimpl_->resizeCurrentBuffer();
}
}
void BufferView::repaint()
{
pimpl_->repaint();
}
bool BufferView::fitCursor()
{
return pimpl_->fitCursor();
}
void BufferView::update()
{
pimpl_->update();
}
void BufferView::updateScrollbar()
{
pimpl_->updateScrollbar();
}
void BufferView::scrollDocView(int value)
{
pimpl_->scrollDocView(value);
}
void BufferView::redoCurrentBuffer()
{
pimpl_->redoCurrentBuffer();
}
bool BufferView::available() const
{
return pimpl_->available();
}
void BufferView::beforeChange(LyXText * text)
{
pimpl_->beforeChange(text);
}
void BufferView::savePosition(unsigned int i)
{
pimpl_->savePosition(i);
}
void BufferView::restorePosition(unsigned int i)
{
pimpl_->restorePosition(i);
}
bool BufferView::isSavedPosition(unsigned int i)
{
return pimpl_->isSavedPosition(i);
}
void BufferView::update(LyXText * text, UpdateCodes f)
{
pimpl_->update(text, f);
}
void BufferView::switchKeyMap()
{
pimpl_->switchKeyMap();
}
void BufferView::insetUnlock()
{
pimpl_->insetUnlock();
}
int BufferView::workWidth() const
{
return pimpl_->workarea().workWidth();
}
void BufferView::showCursor()
{
pimpl_->showCursor();
}
void BufferView::hideCursor()
{
pimpl_->hideCursor();
}
void BufferView::toggleSelection(bool b)
{
pimpl_->toggleSelection(b);
}
void BufferView::toggleToggle()
{
pimpl_->toggleToggle();
}
void BufferView::center()
{
pimpl_->center();
}
string const BufferView::getClipboard() const
{
return pimpl_->workarea().getClipboard();
}
void BufferView::stuffClipboard(string const & stuff) const
{
pimpl_->stuffClipboard(stuff);
}
BufferView::UpdateCodes operator|(BufferView::UpdateCodes uc1,
BufferView::UpdateCodes uc2)
{
return static_cast<BufferView::UpdateCodes>
(static_cast<int>(uc1) | static_cast<int>(uc2));
}
bool BufferView::dispatch(FuncRequest const & ev)
{
return pimpl_->dispatch(ev);
}
void BufferView::scroll(int lines)
{
pimpl_->scroll(lines);
}
int BufferView::defaultHeight() const
{
return text->defaultHeight();
}
// Inserts a file into current document
bool BufferView::insertLyXFile(string const & filen)
//
// Copyright CHT Software Service GmbH
// Uwe C. Schroeder
//
// Insert a LyXformat - file into current buffer
//
// Moved from lyx_cb.C (Lgb)
{
if (filen.empty())
return false;
string const fname = MakeAbsPath(filen);
// check if file exist
FileInfo const fi(fname);
if (!fi.readable()) {
Alert::alert(_("Error!"),
_("Specified file is unreadable: "),
MakeDisplayPath(fname, 50));
return false;
}
beforeChange(text);
ifstream ifs(fname.c_str());
if (!ifs) {
Alert::err_alert(_("Error! Cannot open specified file:"),
MakeDisplayPath(fname, 50));
return false;
}
int const c = ifs.peek();
LyXLex lex(0, 0);
lex.setStream(ifs);
bool res = true;
if (c == '#') {
lyxerr[Debug::INFO] << "Will insert file with header" << endl;
res = buffer()->readFile(lex, fname, text->cursor.par());
} else {
lyxerr[Debug::INFO] << "Will insert file without header"
<< endl;
res = buffer()->readLyXformat2(lex, text->cursor.par());
}
resize();
return res;
}
bool BufferView::removeAutoInsets()
{
// keep track of which pos and par the cursor was on
Paragraph * cursor_par = text->cursor.par();
Paragraph * cursor_par_prev = cursor_par ? cursor_par->previous() : 0;
Paragraph * cursor_par_next = cursor_par ? cursor_par->next() : 0;
pos_type cursor_pos = text->cursor.pos();
bool found = false;
// Trap the deletion of the paragraph the cursor is in.
// Iterate until we find a paragraph that won't be immediately deleted.
// In reality this should mean we only execute the body of the while
// loop once at most. However for safety we iterate rather than just
// make this an if () conditional.
while ((cursor_par_prev || cursor_par_next)
&& text->setCursor(this,
cursor_par_prev ? cursor_par_prev : cursor_par_next,
0)) {
// We just removed cursor_par so have to fix the "cursor"
if (cursor_par_prev) {
// '.' = cursor_par
// a -> a.
// .
cursor_par = cursor_par_prev;
cursor_pos = cursor_par->size();
} else {
// . -> .a
// a
cursor_par = cursor_par_next;
cursor_pos = 0;
}
cursor_par_prev = cursor_par->previous();
cursor_par_next = cursor_par->next();
}
// Iterate through the paragraphs removing autoDelete insets as we go.
// If the paragraph ends up empty after all the autoDelete insets are
// removed that paragraph will be removed by the next setCursor() call.
ParIterator it = buffer()->par_iterator_begin();
ParIterator end = buffer()->par_iterator_end();
for (; it != end; ++it) {
Paragraph * par = *it;
Paragraph * par_prev = par ? par->previous() : 0;
bool removed = false;
if (text->setCursor(this, par, 0)
&& cursor_par == par_prev) {
// The previous setCursor line was deleted and that
// was the cursor_par line. This can only happen if an
// error box was the sole item on cursor_par.
// It is possible for cursor_par_prev to be stray if
// the line it pointed to only had a error box on it
// so we have to set it to a known correct value.
// This is often the same value it already had.
cursor_par_prev = par->previous();
if (cursor_par_prev) {
// '|' = par, '.' = cursor_par, 'E' = error box
// First step below may occur before while{}
// a |a a a a.
// E -> .E -> |.E -> . -> |b
// . b b |b
// b
cursor_par = cursor_par_prev;
cursor_pos = cursor_par_prev->size();
cursor_par_prev = cursor_par->previous();
// cursor_par_next remains the same
} else if (cursor_par_next) {
// First step below may occur before while{}
// .
// E -> |.E -> |. -> . -> .|a
// a a a |a
cursor_par = cursor_par_next;
cursor_pos = 0;
// cursor_par_prev remains unset
cursor_par_next = cursor_par->next();
} else {
// I can't find a way to trigger this
// so it should be unreachable code
// unless the buffer is corrupted.
lyxerr << "BufferView::removeAutoInsets() is bad\n";
}
}
InsetList::iterator pit = par->insetlist.begin();
InsetList::iterator pend = par->insetlist.end();
while (pit != pend) {
if (pit.getInset()->autoDelete()) {
removed = true;
pos_type const pos = pit.getPos();
par->erase(pos);
// We just invalidated par's inset iterators so
// we get the next valid iterator position
pit = par->insetlist.insetIterator(pos);
// and ensure we have a valid end iterator.
pend = par->insetlist.end();
if (cursor_par == par) {
// update the saved cursor position
if (cursor_pos > pos)
--cursor_pos;
}
} else {
++pit;
}
}
if (removed) {
found = true;
text->redoParagraph(this);
}
}
// It is possible that the last line is empty if it was cursor_par
// and/or only had an error inset on it. So we set the cursor to the
// start of the doc to force its removal and ensure a valid saved cursor
if (text->setCursor(this, text->ownerParagraph(), 0)
&& 0 == cursor_par_next) {
cursor_par = cursor_par_prev;
cursor_pos = cursor_par->size();
} else if (cursor_pos > cursor_par->size()) {
// Some C-Enter lines were removed by the setCursor call which
// then invalidated cursor_pos. It could still be "wrong" because
// the cursor may appear to have jumped but since we collapsed
// some C-Enter lines this should be a reasonable compromise.
cursor_pos = cursor_par->size();
}
// restore the original cursor in its corrected location.
text->setCursorIntern(this, cursor_par, cursor_pos);
return found;
}
void BufferView::insertErrors(TeXErrors & terr)
{
// Save the cursor position
LyXCursor cursor = text->cursor;
TeXErrors::Errors::const_iterator cit = terr.begin();
TeXErrors::Errors::const_iterator end = terr.end();
for (; cit != end; ++cit) {
string const desctext(cit->error_desc);
string const errortext(cit->error_text);
string const msgtxt = desctext + '\n' + errortext;
int const errorrow = cit->error_in_line;
// Insert error string for row number
int tmpid = -1;
int tmppos = -1;
if (buffer()->texrow.getIdFromRow(errorrow, tmpid, tmppos)) {
buffer()->texrow.increasePos(tmpid, tmppos);
}
Paragraph * texrowpar = 0;
if (tmpid == -1) {
texrowpar = text->ownerParagraph();
tmppos = 0;
} else {
texrowpar = buffer()->getParFromID(tmpid);
}
if (texrowpar == 0)
continue;
freezeUndo();
InsetError * new_inset = new InsetError(msgtxt);
text->setCursorIntern(this, texrowpar, tmppos);
text->insertInset(this, new_inset);
text->fullRebreak(this);
unFreezeUndo();
}
// Restore the cursor position
text->setCursorIntern(this, cursor.par(), cursor.pos());
}
void BufferView::setCursorFromRow(int row)
{
int tmpid = -1;
int tmppos = -1;
buffer()->texrow.getIdFromRow(row, tmpid, tmppos);
Paragraph * texrowpar;
if (tmpid == -1) {
texrowpar = text->ownerParagraph();
tmppos = 0;
} else {
texrowpar = buffer()->getParFromID(tmpid);
}
text->setCursor(this, texrowpar, tmppos);
}
bool BufferView::insertInset(Inset * inset, string const & lout)
{
return pimpl_->insertInset(inset, lout);
}
// This is also a buffer property (ale)
// Not so sure about that. a goto Label function can not be buffer local, just
// think how this will work in a multiwindow/buffer environment, all the
// cursors in all the views showing this buffer will move. (Lgb)
// OK, then no cursor action should be allowed in buffer. (ale)
bool BufferView::gotoLabel(string const & label)
{
for (Buffer::inset_iterator it = buffer()->inset_iterator_begin();
it != buffer()->inset_iterator_end(); ++it) {
vector<string> labels = it->getLabelList();
if (find(labels.begin(),labels.end(),label)
!= labels.end()) {
beforeChange(text);
text->setCursor(this, it.getPar(), it.getPos());
text->selection.cursor = text->cursor;
update(text, BufferView::SELECT|BufferView::FITCUR);
return true;
}
}
return false;
}
void BufferView::undo()
{
if (!available())
return;
owner()->message(_("Undo"));
hideCursor();
beforeChange(text);
update(text, BufferView::SELECT|BufferView::FITCUR);
if (!textUndo(this))
owner()->message(_("No further undo information"));
else
update(text, BufferView::SELECT|BufferView::FITCUR|BufferView::CHANGE);
switchKeyMap();
}
void BufferView::redo()
{
if (!available())
return;
owner()->message(_("Redo"));
hideCursor();
beforeChange(text);
update(text, BufferView::SELECT|BufferView::FITCUR);
if (!textRedo(this))
owner()->message(_("No further redo information"));
else
update(text, BufferView::SELECT|BufferView::FITCUR|BufferView::CHANGE);
switchKeyMap();
}
void BufferView::copyEnvironment()
{
if (available()) {
text->copyEnvironmentType();
owner()->message(_("Paragraph environment type copied"));
}
}
void BufferView::pasteEnvironment()
{
if (available()) {
text->pasteEnvironmentType(this);
owner()->message(_("Paragraph environment type set"));
update(text, BufferView::SELECT|BufferView::FITCUR|BufferView::CHANGE);
}
}
// these functions are for the spellchecker
WordLangTuple const BufferView::nextWord(float & value)
{
if (!available()) {
value = 1;
return WordLangTuple();
}
return text->selectNextWordToSpellcheck(this, value);
}
void BufferView::selectLastWord()
{
if (!available())
return;
LyXCursor cur = text->selection.cursor;
hideCursor();
beforeChange(text);
text->selection.cursor = cur;
text->selectSelectedWord(this);
toggleSelection(false);
update(text, BufferView::SELECT|BufferView::FITCUR);
}
void BufferView::endOfSpellCheck()
{
if (!available()) return;
hideCursor();
beforeChange(text);
text->selectSelectedWord(this);
text->clearSelection();
update(text, BufferView::SELECT|BufferView::FITCUR);
}
void BufferView::replaceWord(string const & replacestring)
{
if (!available())
return;
LyXText * tt = getLyXText();
hideCursor();
update(tt, BufferView::SELECT|BufferView::FITCUR);
// clear the selection (if there is any)
toggleSelection(false);
update(tt, BufferView::SELECT|BufferView::FITCUR);
// clear the selection (if there is any)
toggleSelection(false);
tt->replaceSelectionWithString(this, replacestring);
tt->setSelectionOverString(this, replacestring);
// Go back so that replacement string is also spellchecked
for (string::size_type i = 0; i < replacestring.length() + 1; ++i) {
tt->cursorLeft(this);
}
update(tt, BufferView::SELECT|BufferView::FITCUR|BufferView::CHANGE);
}
// End of spellchecker stuff
bool BufferView::lockInset(UpdatableInset * inset)
{
if (!inset)
return false;
// don't relock if we're already locked
if (theLockingInset() == inset)
return true;
if (!theLockingInset()) {
// first check if it's the inset under the cursor we want lock
// should be most of the time
char const c = text->cursor.par()->getChar(text->cursor.pos());
if (c == Paragraph::META_INSET) {
Inset * in = text->cursor.par()->getInset(text->cursor.pos());
if (inset == in) {
theLockingInset(inset);
return true;
}
}
// Then do a deep look of the inset and lock the right one
int const id = inset->id();
ParagraphList::iterator pit = buffer()->paragraphs.begin();
ParagraphList::iterator pend = buffer()->paragraphs.end();
for (; pit != pend; ++pit) {
InsetList::iterator it = pit->insetlist.begin();
InsetList::iterator end = pit->insetlist.end();
for (; it != end; ++it) {
if (it.getInset() == inset) {
text->setCursorIntern(this, &*pit, it.getPos());
theLockingInset(inset);
return true;
}
if (it.getInset()->getInsetFromID(id)) {
text->setCursorIntern(this, &*pit, it.getPos());
it.getInset()->edit(this);
return theLockingInset()->lockInsetInInset(this, inset);
}
}
}
return false;
}
return theLockingInset()->lockInsetInInset(this, inset);
}
void BufferView::showLockedInsetCursor(int x, int y, int asc, int desc)
{
if (available() && theLockingInset() && !theLockingInset()->nodraw()) {
LyXCursor cursor = text->cursor;
Inset * locking_inset = theLockingInset()->getLockingInset();
if ((cursor.pos() - 1 >= 0) &&
cursor.par()->isInset(cursor.pos() - 1) &&
(cursor.par()->getInset(cursor.pos() - 1) ==
locking_inset))
text->setCursor(this, cursor,
cursor.par(), cursor.pos() - 1);
LyXScreen::Cursor_Shape shape = LyXScreen::BAR_SHAPE;
LyXText * txt = getLyXText();
if (locking_inset->isTextInset() &&
locking_inset->lyxCode() != Inset::ERT_CODE &&
(txt->real_current_font.language() !=
buffer()->params.language
|| txt->real_current_font.isVisibleRightToLeft()
!= buffer()->params.language->RightToLeft()))
shape = (txt->real_current_font.isVisibleRightToLeft())
? LyXScreen::REVERSED_L_SHAPE
: LyXScreen::L_SHAPE;
y += cursor.iy() + theLockingInset()->insetInInsetY();
screen().showManualCursor(text, x, y, asc, desc,
shape);
}
}
void BufferView::hideLockedInsetCursor()
{
if (theLockingInset() && available()) {
screen().hideCursor();
}
}
bool BufferView::fitLockedInsetCursor(int x, int y, int asc, int desc)
{
if (theLockingInset() && available()) {
y += text->cursor.iy() + theLockingInset()->insetInInsetY();
if (screen().fitManualCursor(this, text, x, y, asc, desc)) {
updateScrollbar();
return true;
}
}
return false;
}
int BufferView::unlockInset(UpdatableInset * inset)
{
if (!inset)
return 0;
if (inset && theLockingInset() == inset) {
inset->insetUnlock(this);
theLockingInset(0);
// make sure we update the combo !
owner()->setLayout(getLyXText()->cursor.par()->layout()->name());
// Tell the paragraph dialog that we changed paragraph
owner()->getDialogs().updateParagraph();
finishUndo();
return 0;
} else if (inset && theLockingInset() &&
theLockingInset()->unlockInsetInInset(this, inset)) {
// Tell the paragraph dialog that we changed paragraph
owner()->getDialogs().updateParagraph();
// owner inset has updated the layout combo
finishUndo();
return 0;
}
return bufferlist.unlockInset(inset);
}
void BufferView::lockedInsetStoreUndo(Undo::undo_kind kind)
{
if (!theLockingInset())
return; // shouldn't happen
if (kind == Undo::EDIT) // in this case insets would not be stored!
kind = Undo::FINISH;
setUndo(this, kind,
text->cursor.par(),
text->cursor.par()->next());
}
void BufferView::updateInset(Inset * inset, bool mark_dirty)
{
pimpl_->updateInset(inset, mark_dirty);
}
bool BufferView::ChangeInsets(Inset::Code code,
string const & from, string const & to)
{
bool need_update = false;
LyXCursor cursor = text->cursor;
LyXCursor tmpcursor = cursor;
cursor.par(tmpcursor.par());
cursor.pos(tmpcursor.pos());
ParIterator end = buffer()->par_iterator_end();
for (ParIterator it = buffer()->par_iterator_begin();
it != end; ++it) {
Paragraph * par = *it;
bool changed_inset = false;
for (InsetList::iterator it2 = par->insetlist.begin();
it2 != par->insetlist.end(); ++it2) {
if (it2.getInset()->lyxCode() == code) {
InsetCommand * inset = static_cast<InsetCommand *>(it2.getInset());
if (inset->getContents() == from) {
inset->setContents(to);
changed_inset = true;
}
}
}
if (changed_inset) {
need_update = true;
// FIXME
// The test it.size()==1 was needed to prevent crashes.
// How to set the cursor corretly when it.size()>1 ??
if (it.size() == 1) {
text->setCursorIntern(this, par, 0);
text->redoParagraphs(this, text->cursor,
text->cursor.par()->next());
text->fullRebreak(this);
}
}
}
text->setCursorIntern(this, cursor.par(), cursor.pos());
return need_update;
}
bool BufferView::ChangeRefsIfUnique(string const & from, string const & to)
{
// Check if the label 'from' appears more than once
vector<string> labels = buffer()->getLabelList();
if (lyx::count(labels.begin(), labels.end(), from) > 1)
return false;
return ChangeInsets(Inset::REF_CODE, from, to);
}
bool BufferView::ChangeCitationsIfUnique(string const & from,
string const & to)
{
typedef pair<string, string> StringPair;
vector<StringPair> keys = buffer()->getBibkeyList();
if (count_if(keys.begin(), keys.end(),
lyx::equal_1st_in_pair<StringPair>(from))
> 1)
return false;
return ChangeInsets(Inset::CITE_CODE, from, to);
}
UpdatableInset * BufferView::theLockingInset() const
{
// If NULL is not allowed we should put an Assert here. (Lgb)
if (text)
return text->the_locking_inset;
return 0;
}
void BufferView::theLockingInset(UpdatableInset * inset)
{
text->the_locking_inset = inset;
}
LyXText * BufferView::getLyXText() const
{
if (theLockingInset()) {
LyXText * txt = theLockingInset()->getLyXText(this, true);
if (txt)
return txt;
}
return text;
}
LyXText * BufferView::getParentText(Inset * inset) const
{
if (inset->owner()) {
LyXText * txt = inset->getLyXText(this);
inset = inset->owner();
while (inset && inset->getLyXText(this) == txt)
inset = inset->owner();
if (inset)
return inset->getLyXText(this);
}
return text;
}
Language const * BufferView::getParentLanguage(Inset * inset) const
{
LyXText * text = getParentText(inset);
return text->cursor.par()->getFontSettings(buffer()->params,
text->cursor.pos()).language();
}
Encoding const * BufferView::getEncoding() const
{
LyXText * t = getLyXText();
if (!t)
return 0;
LyXCursor const & c= t->cursor;
LyXFont const font = c.par()->getFont(buffer()->params, c.pos());
return font.language()->encoding();
}
void BufferView::haveSelection(bool sel)
{
pimpl_->workarea().haveSelection(sel);
}
int BufferView::workHeight() const
{
return pimpl_->workarea().workHeight();
}