lyx_mirror/src/bufferlist.C
John Levon cf216cd7fc Rob's patch and some minor cleanup
git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@5092 a592a061-630c-0410-9148-cb99ea01b6c8
2002-08-24 22:02:30 +00:00

566 lines
12 KiB
C

/* This file is part of
* ======================================================
*
* LyX, The Document Word Processor
*
* Copyright 1995 Matthias Ettrich
* Copyright 1995-2001 The LyX Team.
*
* This file is Copyright 1996-2001
* Lars Gullik Bjønnes
*
* ======================================================
*/
#include <config.h>
#ifdef __GNUG__
#pragma implementation
#endif
#include "bufferlist.h"
#include "lyx_main.h"
#include "lastfiles.h"
#include "debug.h"
#include "lyxrc.h"
#include "lyxtext.h"
#include "lyx_cb.h"
#include "bufferview_funcs.h"
#include "BufferView.h"
#include "gettext.h"
#include "frontends/LyXView.h"
#include "vc-backend.h"
#include "TextCache.h"
#include "lyxlex.h"
#include "frontends/Alert.h"
#include "support/FileInfo.h"
#include "support/filetools.h"
#include "support/lyxmanip.h"
#include "support/lyxfunctional.h"
#include "support/LAssert.h"
#include <boost/bind.hpp>
#include <cassert>
#include <algorithm>
#include <functional>
using std::vector;
using std::find;
using std::endl;
using std::find_if;
using std::for_each;
using std::mem_fun;
extern BufferView * current_view;
//
// Class BufferStorage
//
void BufferStorage::release(Buffer * buf)
{
lyx::Assert(buf);
Container::iterator it = find(container.begin(), container.end(), buf);
if (it != container.end()) {
// Make sure that we don't store a LyXText in
// the textcache that points to the buffer
// we just deleted.
Buffer * tmp = (*it);
container.erase(it);
textcache.removeAllWithBuffer(tmp);
delete tmp;
}
}
Buffer * BufferStorage::newBuffer(string const & s, bool ronly)
{
Buffer * tmpbuf = new Buffer(s, ronly);
tmpbuf->params.useClassDefaults();
lyxerr[Debug::INFO] << "Assigning to buffer "
<< container.size() << endl;
container.push_back(tmpbuf);
return tmpbuf;
}
//
// Class BufferList
//
BufferList::BufferList()
: state_(BufferList::OK)
{}
bool BufferList::empty() const
{
return bstore.empty();
}
bool BufferList::qwriteOne(Buffer * buf, string const & fname,
string & unsaved_list)
{
bool reask = true;
while (reask) {
switch (Alert::askConfirmation(_("Changes in document:"),
fname,
_("Save document?"))) {
case 1: // Yes
// FIXME: WriteAs can be asynch !
if (buf->isUnnamed())
reask = !WriteAs(current_view, buf);
else {
reask = !MenuWrite(current_view, buf);
}
break;
case 2: // No
// if we crash after this we could
// have no autosave file but I guess
// this is really inprobable (Jug)
if (buf->isUnnamed()) {
removeAutosaveFile(buf->fileName());
}
unsaved_list += MakeDisplayPath(fname, 50) + "\n";
return true;
case 3: // Cancel
return false;
}
}
return true;
}
bool BufferList::qwriteAll()
{
string unsaved;
BufferStorage::iterator it = bstore.begin();
BufferStorage::iterator end = bstore.end();
for (; it != end; ++it) {
if (!(*it)->isClean()) {
string fname;
if ((*it)->isUnnamed())
fname = OnlyFilename((*it)->fileName());
else
fname = MakeDisplayPath((*it)->fileName(), 50);
if (!qwriteOne(*it, fname, unsaved)) // cancel the request!
return false;
}
}
return true;
}
void BufferList::closeAll()
{
state_ = BufferList::CLOSING;
// Since we are closing we can just as well delete all
// in the textcache this will also speed the closing/quiting up a bit.
textcache.clear();
while (!bstore.empty()) {
close(bstore.front());
}
state_ = BufferList::OK;
}
bool BufferList::close(Buffer * buf)
{
lyx::Assert(buf);
// CHECK
// Trace back why we need to use buf->getUser here.
// Perhaps slight rewrite is in order? (Lgb)
if (buf->getUser())
buf->getUser()->insetUnlock();
if (!buf->paragraphs.empty() && !buf->isClean() && !quitting) {
if (buf->getUser())
buf->getUser()->owner()->prohibitInput();
string fname;
if (buf->isUnnamed())
fname = OnlyFilename(buf->fileName());
else
fname = MakeDisplayPath(buf->fileName(), 50);
bool reask = true;
while (reask) {
switch (Alert::askConfirmation(_("Changes in document:"),
fname,
_("Save document?"))) {
case 1: // Yes
if (buf->isUnnamed())
reask = !WriteAs(current_view, buf);
else if (buf->save()) {
lastfiles->newFile(buf->fileName());
reask = false;
} else {
if (buf->getUser())
buf->getUser()->owner()->allowInput();
return false;
}
break;
case 2:
if (buf->isUnnamed()) {
removeAutosaveFile(buf->fileName());
}
reask = false;
break;
case 3: // Cancel
if (buf->getUser())
buf->getUser()->owner()->allowInput();
return false;
}
}
if (buf->getUser())
buf->getUser()->owner()->allowInput();
}
bstore.release(buf);
return true;
}
vector<string> const BufferList::getFileNames() const
{
vector<string> nvec;
std::copy(bstore.begin(), bstore.end(),
lyx::back_inserter_fun(nvec, &Buffer::fileName));
return nvec;
}
Buffer * BufferList::first()
{
if (bstore.empty())
return 0;
return bstore.front();
}
Buffer * BufferList::getBuffer(unsigned int choice)
{
if (choice >= bstore.size())
return 0;
return bstore[choice];
}
int BufferList::unlockInset(UpdatableInset * inset)
{
lyx::Assert(inset);
BufferStorage::iterator it = bstore.begin();
BufferStorage::iterator end = bstore.end();
for (; it != end; ++it) {
if ((*it)->getUser()
&& (*it)->getUser()->theLockingInset() == inset) {
(*it)->getUser()->insetUnlock();
return 0;
}
}
return 1;
}
void BufferList::updateIncludedTeXfiles(string const & mastertmpdir)
{
BufferStorage::iterator it = bstore.begin();
BufferStorage::iterator end = bstore.end();
for (; it != end; ++it) {
if (!(*it)->isDepClean(mastertmpdir)) {
string writefile = mastertmpdir;
writefile += '/';
writefile += (*it)->getLatexName();
(*it)->makeLaTeXFile(writefile, mastertmpdir,
false, true);
(*it)->markDepClean(mastertmpdir);
}
}
}
void BufferList::emergencyWriteAll()
{
for_each(bstore.begin(), bstore.end(),
boost::bind(&BufferList::emergencyWrite, this, _1));
}
void BufferList::emergencyWrite(Buffer * buf)
{
// assert(buf) // this is not good since C assert takes an int
// and a pointer is a long (JMarc)
assert(buf != 0); // use c assert to avoid a loop
// No need to save if the buffer has not changed.
if (buf->isClean())
return;
string const doc = buf->isUnnamed()
? OnlyFilename(buf->fileName()) : buf->fileName();
lyxerr << _("LyX: Attempting to save document ") << doc << endl;
// We try to save three places:
// 1) Same place as document. Unless it is an unnamed doc.
if (!buf->isUnnamed()) {
string s = buf->fileName();
s += ".emergency";
lyxerr << " " << s << endl;
if (buf->writeFile(s)) {
buf->markClean();
lyxerr << _(" Save seems successful. Phew.") << endl;
return;
} else {
lyxerr << _(" Save failed! Trying...") << endl;
}
}
// 2) In HOME directory.
string s = AddName(GetEnvPath("HOME"), buf->fileName());
s += ".emergency";
lyxerr << " " << s << endl;
if (buf->writeFile(s)) {
buf->markClean();
lyxerr << _(" Save seems successful. Phew.") << endl;
return;
}
lyxerr << _(" Save failed! Trying...") << endl;
// 3) In "/tmp" directory.
// MakeAbsPath to prepend the current
// drive letter on OS/2
s = AddName(MakeAbsPath("/tmp/"), buf->fileName());
s += ".emergency";
lyxerr << " " << s << endl;
if (buf->writeFile(s)) {
buf->markClean();
lyxerr << _(" Save seems successful. Phew.") << endl;
return;
}
lyxerr << _(" Save failed! Bummer. Document is lost.") << endl;
}
Buffer * BufferList::readFile(string const & s, bool ronly)
{
string ts(s);
string e = OnlyPath(s);
string a = e;
// File information about normal file
FileInfo fileInfo2(s);
if (!fileInfo2.exist()) {
Alert::alert(_("Error!"), _("Cannot open file"),
MakeDisplayPath(s));
return 0;
}
Buffer * b = bstore.newBuffer(s, ronly);
// Check if emergency save file exists and is newer.
e += OnlyFilename(s) + ".emergency";
FileInfo fileInfoE(e);
bool use_emergency = false;
if (fileInfoE.exist() && fileInfo2.exist()) {
if (fileInfoE.getModificationTime()
> fileInfo2.getModificationTime()) {
if (Alert::askQuestion(_("An emergency save of this document exists!"),
MakeDisplayPath(s, 50),
_("Try to load that instead?"))) {
ts = e;
// the file is not saved if we load the
// emergency file.
b->markDirty();
use_emergency = true;
} else {
// Here, we should delete the emergency save
lyx::unlink(e);
}
}
}
if (!use_emergency) {
// Now check if autosave file is newer.
a += '#';
a += OnlyFilename(s);
a += '#';
FileInfo fileInfoA(a);
if (fileInfoA.exist() && fileInfo2.exist()) {
if (fileInfoA.getModificationTime()
> fileInfo2.getModificationTime()) {
if (Alert::askQuestion(_("Autosave file is newer."),
MakeDisplayPath(s, 50),
_("Load that one instead?"))) {
ts = a;
// the file is not saved if we load the
// autosave file.
b->markDirty();
} else {
// Here, we should delete the autosave
lyx::unlink(a);
}
}
}
}
// not sure if this is the correct place to begin LyXLex
LyXLex lex(0, 0);
lex.setFile(ts);
if (b->readFile(lex))
return b;
else {
bstore.release(b);
return 0;
}
}
bool BufferList::exists(string const & s) const
{
return find_if(bstore.begin(), bstore.end(),
lyx::compare_memfun(&Buffer::fileName, s))
!= bstore.end();
}
bool BufferList::isLoaded(Buffer const * b) const
{
lyx::Assert(b);
BufferStorage::const_iterator cit =
find(bstore.begin(), bstore.end(), b);
return cit != bstore.end();
}
Buffer * BufferList::getBuffer(string const & s)
{
BufferStorage::iterator it =
find_if(bstore.begin(), bstore.end(),
lyx::compare_memfun(&Buffer::fileName, s));
return it != bstore.end() ? (*it) : 0;
}
Buffer * BufferList::newFile(string const & name, string tname, bool isNamed)
{
// get a free buffer
Buffer * b = bstore.newBuffer(name);
// use defaults.lyx as a default template if it exists.
if (tname.empty()) {
tname = LibFileSearch("templates", "defaults.lyx");
}
if (!tname.empty()) {
bool templateok = false;
LyXLex lex(0, 0);
lex.setFile(tname);
if (lex.isOK()) {
if (b->readFile(lex)) {
templateok = true;
}
}
if (!templateok) {
Alert::alert(_("Error!"), _("Unable to open template"),
MakeDisplayPath(tname));
// no template, start with empty buffer
b->paragraphs.set(new Paragraph);
b->paragraphs.begin()->layout(b->params.getLyXTextClass().defaultLayout());
}
} else { // start with empty buffer
b->paragraphs.set(new Paragraph);
b->paragraphs.begin()->layout(b->params.getLyXTextClass().defaultLayout());
}
if (!isNamed) {
b->setUnnamed();
b->setFileName(name);
}
b->setReadonly(false);
return b;
}
Buffer * BufferList::loadLyXFile(string const & filename, bool tolastfiles)
{
// get absolute path of file and add ".lyx" to the filename if
// necessary
string s = FileSearch(string(), filename, "lyx");
if (s.empty()) {
s = filename;
}
// file already open?
if (exists(s)) {
if (Alert::askQuestion(_("Document is already open:"),
MakeDisplayPath(s, 50),
_("Do you want to reload that document?"))) {
// Reload is accomplished by closing and then loading
if (!close(getBuffer(s))) {
return 0;
}
// Fall through to new load. (Asger)
} else {
// Here, we pretend that we just loaded the
// open document
return getBuffer(s);
}
}
Buffer * b = 0;
bool ro = false;
switch (IsFileWriteable(s)) {
case 0:
ro = true;
// Fall through
case 1:
b = readFile(s, ro);
if (b) {
b->lyxvc.file_found_hook(s);
}
break; //fine- it's r/w
case -1:
// Here we probably should run
if (LyXVC::file_not_found_hook(s)) {
// Ask if the file should be checked out for
// viewing/editing, if so: load it.
if (Alert::askQuestion(_("Do you want to retrieve file under version control?"))) {
// How can we know _how_ to do the checkout?
// With the current VC support it has to be,
// a RCS file since CVS do not have special ,v files.
RCS::retrieve(s);
return loadLyXFile(filename, tolastfiles);
}
}
if (Alert::askQuestion(_("Cannot open specified file:"),
MakeDisplayPath(s, 50),
_("Create new document with this name?")))
{
// Find a free buffer
b = newFile(s, string(), true);
}
break;
}
if (b && tolastfiles)
lastfiles->newFile(b->fileName());
return b;
}