]> git.lyx.org Git - lyx.git/blobdiff - src/lyxfunc.C
make "make distcheck" work
[lyx.git] / src / lyxfunc.C
index 42a7b708da894108948468fdb07a517823f382e6..f6e54aa3faf682d4d37af6ac964aedb5cdc7c024 100644 (file)
 #include "frontends/Menubar.h"
 #include "frontends/Toolbars.h"
 
-#include "support/FileInfo.h"
+#include "support/environment.h"
+#include "support/filefilterlist.h"
 #include "support/filetools.h"
 #include "support/forkedcontr.h"
-#include "support/globbing.h"
+#include "support/fs_extras.h"
 #include "support/lstrings.h"
 #include "support/path.h"
-#include "support/path_defines.h"
+#include "support/package.h"
 #include "support/systemcall.h"
-#include "support/tostr.h"
-#include "support/std_sstream.h"
+#include "support/convert.h"
 #include "support/os.h"
 
+#include <boost/filesystem/operations.hpp>
+
+#include <sstream>
+
 using bv_funcs::freefont2string;
 
+using lyx::support::AbsolutePath;
 using lyx::support::AddName;
 using lyx::support::AddPath;
 using lyx::support::bformat;
 using lyx::support::ChangeExtension;
 using lyx::support::contains;
 using lyx::support::FileFilterList;
-using lyx::support::FileInfo;
 using lyx::support::FileSearch;
 using lyx::support::ForkedcallsController;
 using lyx::support::i18nLibFileSearch;
@@ -107,20 +111,16 @@ using lyx::support::IsFileReadable;
 using lyx::support::isStrInt;
 using lyx::support::MakeAbsPath;
 using lyx::support::MakeDisplayPath;
+using lyx::support::package;
 using lyx::support::Path;
 using lyx::support::QuoteName;
 using lyx::support::rtrim;
 using lyx::support::split;
-using lyx::support::strToInt;
-using lyx::support::strToUnsignedInt;
 using lyx::support::subst;
-using lyx::support::system_lyxdir;
 using lyx::support::Systemcall;
 using lyx::support::token;
 using lyx::support::trim;
-using lyx::support::user_lyxdir;
 using lyx::support::prefixIs;
-using lyx::support::os::getTmpDir;
 
 using std::endl;
 using std::make_pair;
@@ -128,10 +128,12 @@ using std::pair;
 using std::string;
 using std::istringstream;
 
+namespace biblio = lyx::biblio;
+namespace fs = boost::filesystem;
+
 
 extern BufferList bufferlist;
 extern LyXServer * lyxserver;
-extern bool selection_possible;
 
 extern boost::scoped_ptr<kb_keymap> toplevel_keymap;
 
@@ -139,6 +141,47 @@ extern boost::scoped_ptr<kb_keymap> toplevel_keymap;
 extern tex_accent_struct get_accent(kb_action action);
 
 
+namespace {
+
+bool getStatus(LCursor cursor,
+              FuncRequest const & cmd, FuncStatus & status)
+{
+       // Try to fix cursor in case it is broken.
+       cursor.fixIfBroken();
+
+       // This is, of course, a mess. Better create a new doc iterator and use
+       // this in Inset::getStatus. This might require an additional
+       // BufferView * arg, though (which should be avoided)
+       //LCursor safe = *this;
+       bool res = false;
+       for ( ; cursor.depth(); cursor.pop()) {
+               //lyxerr << "\nLCursor::getStatus: cmd: " << cmd << endl << *this << endl;
+               DocIterator::idx_type & idx = cursor.idx();
+               DocIterator::idx_type const lastidx = cursor.lastidx();
+               BOOST_ASSERT(idx <= lastidx);
+
+               DocIterator::pit_type & pit = cursor.pit();
+               DocIterator::pit_type const lastpit = cursor.lastpit();
+               BOOST_ASSERT(pit <= lastpit);
+
+               DocIterator::pos_type & pos = cursor.pos();
+               DocIterator::pos_type const lastpos = cursor.lastpos();
+               BOOST_ASSERT(pos <= lastpos);
+
+               // The inset's getStatus() will return 'true' if it made
+               // a definitive decision on whether it want to handle the
+               // request or not. The result of this decision is put into
+               // the 'status' parameter.
+               if (cursor.inset().getStatus(cursor, cmd, status)) {
+                       res = true;
+                       break;
+               }
+       }
+       return res;
+}
+
+}
+
 LyXFunc::LyXFunc(LyXView * lv)
        : owner(lv),
        encoded_last_key(0),
@@ -193,7 +236,9 @@ void LyXFunc::processKeySym(LyXKeySymPtr keysym, key_modifier::state state)
        cancel_meta_seq.reset();
 
        FuncRequest func = cancel_meta_seq.addkey(keysym, state);
-       lyxerr[Debug::KEY] << "action first set to [" << func.action << ']' << endl;
+       lyxerr[Debug::KEY] << BOOST_CURRENT_FUNCTION
+                          << " action first set to [" << func.action << ']'
+                          << endl;
 
        // When not cancel or meta-fake, do the normal lookup.
        // Note how the meta_fake Mod1 bit is OR-ed in and reset afterwards.
@@ -201,20 +246,22 @@ void LyXFunc::processKeySym(LyXKeySymPtr keysym, key_modifier::state state)
        if ((func.action != LFUN_CANCEL) && (func.action != LFUN_META_FAKE)) {
                // remove Caps Lock and Mod2 as a modifiers
                func = keyseq.addkey(keysym, (state | meta_fake_bit));
-               lyxerr[Debug::KEY] << "action now set to ["
-                       << func.action << ']' << endl;
+               lyxerr[Debug::KEY] << BOOST_CURRENT_FUNCTION
+                                  << "action now set to ["
+                                  << func.action << ']' << endl;
        }
 
        // Dont remove this unless you know what you are doing.
        meta_fake_bit = key_modifier::none;
 
-       // can this happen now ?
+       // Can this happen now ?
        if (func.action == LFUN_NOACTION) {
                func = FuncRequest(LFUN_PREFIX);
        }
 
        if (lyxerr.debugging(Debug::KEY)) {
-               lyxerr << "Key [action="
+               lyxerr << BOOST_CURRENT_FUNCTION
+                      << " Key [action="
                       << func.action << "]["
                       << keyseq.print() << ']'
                       << endl;
@@ -254,7 +301,7 @@ void LyXFunc::processKeySym(LyXKeySymPtr keysym, key_modifier::state state)
 
        if (func.action == LFUN_SELFINSERT) {
                if (encoded_last_key != 0) {
-                       string arg(1, encoded_last_key);
+                       string const arg(1, encoded_last_key);
                        dispatch(FuncRequest(LFUN_SELFINSERT, arg));
                        lyxerr[Debug::KEY]
                                << "SelfInsert arg[`" << arg << "']" << endl;
@@ -269,11 +316,21 @@ FuncStatus LyXFunc::getStatus(FuncRequest const & cmd) const
 {
        //lyxerr << "LyXFunc::getStatus: cmd: " << cmd << endl;
        FuncStatus flag;
-       Buffer * buf = owner->buffer();
        LCursor & cur = view()->cursor();
 
+       /* In LyX/Mac, when a dialog is open, the menus of the
+          application can still be accessed without giving focus to
+          the main window. In this case, we want to disable the menu
+          entries that are buffer-related.
+       */
+       Buffer * buf;
+       if (cmd.origin == FuncRequest::UI && !owner->hasFocus())
+               buf = 0;
+       else
+               buf = owner->buffer();
+
        if (cmd.action == LFUN_NOACTION) {
-               setStatusMessage(N_("Nothing to do"));
+               flag.message(N_("Nothing to do"));
                flag.enabled(false);
                return flag;
        }
@@ -291,17 +348,20 @@ FuncStatus LyXFunc::getStatus(FuncRequest const & cmd) const
        }
 
        if (flag.unknown()) {
-               setStatusMessage(N_("Unknown action"));
+               flag.message(N_("Unknown action"));
                return flag;
        }
 
-       // the default error message if we disable the command
-       setStatusMessage(N_("Command disabled"));
+       if (!flag.enabled()) {
+               if (flag.message().empty())
+                       flag.message(N_("Command disabled"));
+               return flag;
+       }
 
        // Check whether we need a buffer
        if (!lyxaction.funcHasFlag(cmd.action, LyXAction::NoBuffer) && !buf) {
                // no, exit directly
-               setStatusMessage(N_("Command not allowed with"
+               flag.message(N_("Command not allowed with"
                                    "out any document open"));
                flag.enabled(false);
                return flag;
@@ -371,37 +431,36 @@ FuncStatus LyXFunc::getStatus(FuncRequest const & cmd) const
                enable = !buf->isUnnamed() && !buf->isClean();
                break;
 
-
        case LFUN_INSET_SETTINGS: {
                enable = false;
-               if (!cur.size())
+               if (!cur)
                        break;
                UpdatableInset * inset = cur.inset().asUpdatableInset();
                lyxerr << "inset: " << inset << endl;
                if (!inset)
                        break;
 
-               InsetOld::Code code = inset->lyxCode();
+               InsetBase::Code code = inset->lyxCode();
                switch (code) {
-                       case InsetOld::TABULAR_CODE:
+                       case InsetBase::TABULAR_CODE:
                                enable = cmd.argument == "tabular";
                                break;
-                       case InsetOld::ERT_CODE:
+                       case InsetBase::ERT_CODE:
                                enable = cmd.argument == "ert";
                                break;
-                       case InsetOld::FLOAT_CODE:
+                       case InsetBase::FLOAT_CODE:
                                enable = cmd.argument == "float";
                                break;
-                       case InsetOld::WRAP_CODE:
+                       case InsetBase::WRAP_CODE:
                                enable = cmd.argument == "wrap";
                                break;
-                       case InsetOld::NOTE_CODE:
+                       case InsetBase::NOTE_CODE:
                                enable = cmd.argument == "note";
                                break;
-                       case InsetOld::BRANCH_CODE:
+                       case InsetBase::BRANCH_CODE:
                                enable = cmd.argument == "branch";
                                break;
-                       case InsetOld::BOX_CODE:
+                       case InsetBase::BOX_CODE:
                                enable = cmd.argument == "box";
                                break;
                        default:
@@ -421,8 +480,8 @@ FuncStatus LyXFunc::getStatus(FuncRequest const & cmd) const
                else if (name == "print")
                        enable = Exporter::IsExportable(*buf, "dvi")
                                && lyxrc.print_command != "none";
-               else if (name == "character")
-                       enable = cur.inset().lyxCode() != InsetOld::ERT_CODE;
+               else if (name == "character" || name == "mathpanel")
+                       enable = cur.inset().lyxCode() != InsetBase::ERT_CODE;
                else if (name == "vclog")
                        enable = buf->lyxvc().inUse();
                else if (name == "latexlog")
@@ -430,6 +489,10 @@ FuncStatus LyXFunc::getStatus(FuncRequest const & cmd) const
                break;
        }
 
+       case LFUN_DIALOG_SHOW_NEW_INSET:
+               enable = cur.inset().lyxCode() != InsetBase::ERT_CODE;
+               break;
+
        case LFUN_DIALOG_UPDATE: {
                string const name = cmd.getArg(0);
                if (!buf)
@@ -442,7 +505,9 @@ FuncStatus LyXFunc::getStatus(FuncRequest const & cmd) const
        case LFUN_SEQUENCE: {
                // argument contains ';'-terminated commands
                string const firstcmd = token(cmd.argument, ';', 0);
-               flag = getStatus(lyxaction.lookupFunc(firstcmd));
+               FuncRequest func(lyxaction.lookupFunc(firstcmd));
+               func.origin = cmd.origin;
+               flag = getStatus(func);
        }
 
        case LFUN_MENUNEW:
@@ -471,8 +536,6 @@ FuncStatus LyXFunc::getStatus(FuncRequest const & cmd) const
        case LFUN_GETNAME:
        case LFUN_NOTIFY:
        case LFUN_GOTOFILEROW:
-       case LFUN_GOTO_PARAGRAPH:
-       case LFUN_DIALOG_SHOW_NEW_INSET:
        case LFUN_DIALOG_SHOW_NEXT_INSET:
        case LFUN_DIALOG_HIDE:
        case LFUN_DIALOG_DISCONNECT_INSET:
@@ -498,13 +561,14 @@ FuncStatus LyXFunc::getStatus(FuncRequest const & cmd) const
        case LFUN_SAVE_AS_DEFAULT:
        case LFUN_BUFFERPARAMS_APPLY:
        case LFUN_LYXRC_APPLY:
+       case LFUN_NEXTBUFFER:
+       case LFUN_PREVIOUSBUFFER:
                // these are handled in our dispatch()
                break;
 
        default:
 
-               cur.getStatus(cmd, flag);
-               if (!flag.enabled())
+               if (!::getStatus(cur, cmd, flag))
                        flag = view()->getStatus(cmd);
        }
 
@@ -515,11 +579,14 @@ FuncStatus LyXFunc::getStatus(FuncRequest const & cmd) const
        if (buf && buf->isReadonly()
            && !lyxaction.funcHasFlag(cmd.action, LyXAction::ReadOnly)
            && !lyxaction.funcHasFlag(cmd.action, LyXAction::NoBuffer)) {
-               setStatusMessage(N_("Document is read-only"));
+               flag.message(N_("Document is read-only"));
                flag.enabled(false);
        }
 
-       //lyxerr << "LyXFunc::getStatus: got: " << flag.enabled() << endl;
+       // the default error message if we disable the command
+       if (!flag.enabled() && flag.message().empty())
+               flag.message(N_("Command disabled"));
+
        return flag;
 }
 
@@ -578,11 +645,15 @@ void loadTextclass(string const & name)
        }
 }
 
+
+void actOnUpdatedPrefs(LyXRC const & lyxrc_orig, LyXRC const & lyxrc_new);
+
 } //namespace anon
 
 
-void LyXFunc::dispatch(FuncRequest const & cmd, bool verbose)
+void LyXFunc::dispatch(FuncRequest const & cmd)
 {
+       BOOST_ASSERT(view());
        string const argument = cmd.argument;
        kb_action const action = cmd.action;
 
@@ -592,18 +663,17 @@ void LyXFunc::dispatch(FuncRequest const & cmd, bool verbose)
        // we have not done anything wrong yet.
        errorstat = false;
        dispatch_buffer.erase();
-       selection_possible = false;
 
-       bool update = true;
+       bool update = false;
 
-       // We cannot use this function here
-       if (!getStatus(cmd).enabled()) {
+       FuncStatus const flag = getStatus(cmd);
+       if (!flag.enabled()) {
+               // We cannot use this function here
                lyxerr[Debug::ACTION] << "LyXFunc::dispatch: "
                       << lyxaction.getActionName(action)
                       << " [" << action << "] is disabled at this location"
                       << endl;
-               setErrorMessage(getStatusMessage());
-
+               setErrorMessage(flag.message());
        } else {
 
                if (view()->available())
@@ -953,6 +1023,14 @@ void LyXFunc::dispatch(FuncRequest const & cmd, bool verbose)
                        view()->setBuffer(bufferlist.getBuffer(argument));
                        break;
 
+               case LFUN_NEXTBUFFER:
+                       view()->setBuffer(bufferlist.next(view()->buffer()));
+                       break;
+
+               case LFUN_PREVIOUSBUFFER:
+                       view()->setBuffer(bufferlist.previous(view()->buffer()));
+                       break;
+
                case LFUN_FILE_NEW:
                        NewFile(view(), argument);
                        break;
@@ -987,7 +1065,7 @@ void LyXFunc::dispatch(FuncRequest const & cmd, bool verbose)
                        int row;
                        istringstream is(argument);
                        is >> file_name >> row;
-                       if (prefixIs(file_name, getTmpDir())) {
+                       if (prefixIs(file_name, package().temp_dir())) {
                                // Needed by inverse dvi search. If it is a file
                                // in tmpdir, call the apropriated function
                                view()->setBuffer(bufferlist.getBufferFromTmp(file_name));
@@ -1011,32 +1089,6 @@ void LyXFunc::dispatch(FuncRequest const & cmd, bool verbose)
                        break;
                }
 
-               case LFUN_GOTO_PARAGRAPH: {
-                       istringstream is(argument);
-                       int id;
-                       is >> id;
-                       ParIterator par = owner->buffer()->getParFromID(id);
-                       if (par == owner->buffer()->par_iterator_end()) {
-                               lyxerr[Debug::INFO] << "No matching paragraph found! ["
-                                                               << id << ']' << endl;
-                               break;
-                       } else {
-                               lyxerr[Debug::INFO] << "Paragraph " << par->id()
-                                                               << " found." << endl;
-                       }
-
-                       // Set the cursor
-                       view()->setCursor(par, 0);
-
-                       view()->switchKeyMap();
-                       owner->view_state_changed();
-
-                       view()->center();
-                       // see BufferView_pimpl::center()
-                       view()->updateScrollbar();
-                       break;
-               }
-
                case LFUN_DIALOG_SHOW: {
                        string const name = cmd.getArg(0);
                        string data = trim(cmd.argument.substr(name.size()));
@@ -1204,13 +1256,15 @@ void LyXFunc::dispatch(FuncRequest const & cmd, bool verbose)
                        while (!arg.empty()) {
                                string first;
                                arg = split(arg, first, ';');
-                               dispatch(lyxaction.lookupFunc(first));
+                               FuncRequest func(lyxaction.lookupFunc(first));
+                               func.origin = cmd.origin;
+                               dispatch(func);
                        }
                        break;
                }
 
                case LFUN_SAVEPREFERENCES: {
-                       Path p(user_lyxdir());
+                       Path p(package().user_support());
                        lyxrc.write("preferences", false);
                        break;
                }
@@ -1312,6 +1366,32 @@ void LyXFunc::dispatch(FuncRequest const & cmd, bool verbose)
                        break;
                }
 
+               case LFUN_SAVE_AS_DEFAULT: {
+                       string const fname =
+                               AddName(AddPath(package().user_support(), "templates/"),
+                                       "defaults.lyx");
+                       Buffer defaults(fname);
+
+                       istringstream ss(argument);
+                       LyXLex lex(0,0);
+                       lex.setStream(ss);
+                       int const unknown_tokens = defaults.readHeader(lex);
+
+                       if (unknown_tokens != 0) {
+                               lyxerr << "Warning in LFUN_SAVE_AS_DEFAULT!\n"
+                                      << unknown_tokens << " unknown token"
+                                      << (unknown_tokens == 1 ? "" : "s")
+                                      << endl;
+                       }
+
+                       if (defaults.writeFile(defaults.fileName()))
+                               setMessage(_("Document defaults saved in ")
+                                          + MakeDisplayPath(fname));
+                       else
+                               setErrorMessage(_("Unable to save document defaults"));
+                       break;
+               }
+
                case LFUN_BUFFERPARAMS_APPLY: {
                        biblio::CiteEngine const engine =
                                owner->buffer()->params().cite_engine;
@@ -1378,6 +1458,8 @@ void LyXFunc::dispatch(FuncRequest const & cmd, bool verbose)
                        break;
 
                case LFUN_LYXRC_APPLY: {
+                       LyXRC const lyxrc_orig = lyxrc;
+
                        istringstream ss(argument);
                        bool const success = lyxrc.read(ss) == 0;
 
@@ -1385,25 +1467,30 @@ void LyXFunc::dispatch(FuncRequest const & cmd, bool verbose)
                                lyxerr << "Warning in LFUN_LYXRC_APPLY!\n"
                                       << "Unable to read lyxrc data"
                                       << endl;
+                               break;
                        }
+
+                       actOnUpdatedPrefs(lyxrc_orig, lyxrc);
                        break;
                }
 
                default: {
-                       update = false;
-                       DispatchResult res = view()->cursor().dispatch(cmd);
-                       if (res.dispatched())
-                               update |= res.update();
-                       else
+                       view()->cursor().dispatch(cmd);
+                       update |= view()->cursor().result().update();
+                       if (!view()->cursor().result().dispatched()) {
                                update |= view()->dispatch(cmd);
+                       }
 
                        break;
                }
                }
 
                if (view()->available()) {
-                       if (view()->fitCursor() || update)
-                               view()->update();
+                       // Redraw screen unless explicitly told otherwise.
+                       // This also initializes the position cache for all insets
+                       // in (at least partially) visible top-level paragraphs.
+                       view()->update(true, update);
+
                        // if we executed a mutating lfun, mark the buffer as dirty
                        if (getStatus(cmd).enabled()
                                        && !lyxaction.funcHasFlag(cmd.action, LyXAction::NoBuffer)
@@ -1413,18 +1500,20 @@ void LyXFunc::dispatch(FuncRequest const & cmd, bool verbose)
 
                if (view()->cursor().inTexted()) {
                        view()->owner()->updateLayoutChoice();
-                       sendDispatchMessage(getMessage(), cmd, verbose);
                }
        }
+       sendDispatchMessage(getMessage(), cmd);
 }
 
 
-void LyXFunc::sendDispatchMessage(string const & msg,
-                                 FuncRequest const & cmd, bool verbose)
+void LyXFunc::sendDispatchMessage(string const & msg, FuncRequest const & cmd)
 {
        owner->updateMenubar();
        owner->updateToolbars();
 
+       const bool verbose = (cmd.origin == FuncRequest::UI
+                             || cmd.origin == FuncRequest::COMMANDBUFFER);
+
        if (cmd.action == LFUN_SELFINSERT || !verbose) {
                lyxerr[Debug::ACTION] << "dispatch msg is " << msg << endl;
                if (!msg.empty())
@@ -1447,7 +1536,7 @@ void LyXFunc::sendDispatchMessage(string const & msg,
                }
        }
 
-       string const shortcuts = toplevel_keymap->findbinding(cmd);
+       string const shortcuts = toplevel_keymap->printbindings(cmd);
 
        if (!shortcuts.empty()) {
                comname += ": " + shortcuts;
@@ -1491,14 +1580,12 @@ void LyXFunc::menuNew(string const & name, bool fromTemplate)
 
        if (filename.empty()) {
                filename = AddName(lyxrc.document_path,
-                           "newfile" + tostr(++newfile_number) + ".lyx");
-               FileInfo fi(filename);
-               while (bufferlist.exists(filename) || fi.readable()) {
+                           "newfile" + convert<string>(++newfile_number) + ".lyx");
+               while (bufferlist.exists(filename) || fs::is_readable(filename)) {
                        ++newfile_number;
                        filename = AddName(lyxrc.document_path,
-                                   "newfile" + tostr(newfile_number) +
+                                          "newfile" +  convert<string>(newfile_number) +
                                    ".lyx");
-                       fi.newFile(filename);
                }
        }
 
@@ -1547,7 +1634,7 @@ void LyXFunc::open(string const & fname)
                        make_pair(string(_("Documents|#o#O")),
                                  string(lyxrc.document_path)),
                        make_pair(string(_("Examples|#E#e")),
-                                 string(AddPath(system_lyxdir(), "examples"))));
+                                 string(AddPath(package().system_support(), "examples"))));
 
                FileDialog::Result result =
                        fileDlg.open(initpath,
@@ -1577,8 +1664,7 @@ void LyXFunc::open(string const & fname)
        string const disp_fn(MakeDisplayPath(filename));
 
        // if the file doesn't exist, let the user create one
-       FileInfo const f(filename, true);
-       if (!f.exist()) {
+       if (!fs::exists(filename)) {
                // the user specifically chose this name. Believe them.
                view()->newFile(filename, "", true);
                return;
@@ -1623,7 +1709,7 @@ void LyXFunc::doImport(string const & argument)
                        make_pair(string(_("Documents|#o#O")),
                                  string(lyxrc.document_path)),
                        make_pair(string(_("Examples|#E#e")),
-                                 string(AddPath(system_lyxdir(), "examples"))));
+                                 string(AddPath(package().system_support(), "examples"))));
 
                string const filter = formats.prettyName(format)
                        + " (*." + formats.extension(format) + ')';
@@ -1661,7 +1747,7 @@ void LyXFunc::doImport(string const & argument)
 
        // if the file exists already, and we didn't do
        // -i lyx thefile.lyx, warn
-       if (FileInfo(lyxfile, true).exist() && filename != lyxfile) {
+       if (fs::exists(lyxfile) && filename != lyxfile) {
                string const file = MakeDisplayPath(lyxfile, 30);
 
                string text = bformat(_("The document %1$s already exists.\n\n"
@@ -1713,12 +1799,6 @@ void LyXFunc::setMessage(string const & m) const
 }
 
 
-void LyXFunc::setStatusMessage(string const & m) const
-{
-       status_buffer = m;
-}
-
-
 string const LyXFunc::viewStatusMessage()
 {
        // When meta-fake key is pressed, show the key sequence so far + "M-".
@@ -1748,3 +1828,139 @@ bool LyXFunc::wasMetaKey() const
 {
        return (meta_fake_bit != key_modifier::none);
 }
+
+
+namespace {
+
+void actOnUpdatedPrefs(LyXRC const & lyxrc_orig, LyXRC const & lyxrc_new)
+{
+       // Why the switch you might ask. It is a trick to ensure that all
+       // the elements in the LyXRCTags enum is handled. As you can see
+       // there are no breaks at all. So it is just a huge fall-through.
+       // The nice thing is that we will get a warning from the compiler
+       // if we forget an element.
+       LyXRC::LyXRCTags tag = LyXRC::RC_LAST;
+       switch (tag) {
+       case LyXRC::RC_ACCEPT_COMPOUND:
+       case LyXRC::RC_ALT_LANG:
+       case LyXRC::RC_ASCIIROFF_COMMAND:
+       case LyXRC::RC_ASCII_LINELEN:
+       case LyXRC::RC_AUTOREGIONDELETE:
+       case LyXRC::RC_AUTORESET_OPTIONS:
+       case LyXRC::RC_AUTOSAVE:
+       case LyXRC::RC_AUTO_NUMBER:
+       case LyXRC::RC_BACKUPDIR_PATH:
+       case LyXRC::RC_BIBTEX_COMMAND:
+       case LyXRC::RC_BINDFILE:
+       case LyXRC::RC_CHECKLASTFILES:
+       case LyXRC::RC_CHKTEX_COMMAND:
+       case LyXRC::RC_CONVERTER:
+       case LyXRC::RC_COPIER:
+       case LyXRC::RC_CURSOR_FOLLOWS_SCROLLBAR:
+       case LyXRC::RC_CUSTOM_EXPORT_COMMAND:
+       case LyXRC::RC_CUSTOM_EXPORT_FORMAT:
+       case LyXRC::RC_CYGWIN_PATH_FIX:
+               if (lyxrc_orig.cygwin_path_fix != lyxrc_new.cygwin_path_fix) {
+                       namespace os = lyx::support::os;
+                       os::cygwin_path_fix(lyxrc_new.cygwin_path_fix);
+               }
+       case LyXRC::RC_DATE_INSERT_FORMAT:
+       case LyXRC::RC_DEFAULT_LANGUAGE:
+       case LyXRC::RC_DEFAULT_PAPERSIZE:
+       case LyXRC::RC_DIALOGS_ICONIFY_WITH_MAIN:
+       case LyXRC::RC_DISPLAY_GRAPHICS:
+       case LyXRC::RC_DOCUMENTPATH:
+               if (lyxrc_orig.document_path != lyxrc_new.document_path) {
+                       if (fs::exists(lyxrc_new.document_path) &&
+                           fs::is_directory(lyxrc_new.document_path)) {
+                               using lyx::support::package;
+                               package().document_dir() = lyxrc.document_path;
+                       }
+               }
+       case LyXRC::RC_ESC_CHARS:
+       case LyXRC::RC_FONT_ENCODING:
+       case LyXRC::RC_FORMAT:
+       case LyXRC::RC_INDEX_COMMAND:
+       case LyXRC::RC_INPUT:
+       case LyXRC::RC_KBMAP:
+       case LyXRC::RC_KBMAP_PRIMARY:
+       case LyXRC::RC_KBMAP_SECONDARY:
+       case LyXRC::RC_LABEL_INIT_LENGTH:
+       case LyXRC::RC_LANGUAGE_AUTO_BEGIN:
+       case LyXRC::RC_LANGUAGE_AUTO_END:
+       case LyXRC::RC_LANGUAGE_COMMAND_BEGIN:
+       case LyXRC::RC_LANGUAGE_COMMAND_END:
+       case LyXRC::RC_LANGUAGE_COMMAND_LOCAL:
+       case LyXRC::RC_LANGUAGE_GLOBAL_OPTIONS:
+       case LyXRC::RC_LANGUAGE_PACKAGE:
+       case LyXRC::RC_LANGUAGE_USE_BABEL:
+       case LyXRC::RC_LASTFILES:
+       case LyXRC::RC_MAKE_BACKUP:
+       case LyXRC::RC_MARK_FOREIGN_LANGUAGE:
+       case LyXRC::RC_NUMLASTFILES:
+       case LyXRC::RC_PATH_PREFIX:
+               if (lyxrc_orig.path_prefix != lyxrc_new.path_prefix) {
+                       using lyx::support::prependEnvPath;
+                       prependEnvPath("PATH", lyxrc.path_prefix);
+               }
+       case LyXRC::RC_PERS_DICT:
+       case LyXRC::RC_POPUP_BOLD_FONT:
+       case LyXRC::RC_POPUP_FONT_ENCODING:
+       case LyXRC::RC_POPUP_NORMAL_FONT:
+       case LyXRC::RC_PREVIEW:
+       case LyXRC::RC_PREVIEW_HASHED_LABELS:
+       case LyXRC::RC_PREVIEW_SCALE_FACTOR:
+       case LyXRC::RC_PRINTCOLLCOPIESFLAG:
+       case LyXRC::RC_PRINTCOPIESFLAG:
+       case LyXRC::RC_PRINTER:
+       case LyXRC::RC_PRINTEVENPAGEFLAG:
+       case LyXRC::RC_PRINTEXSTRAOPTIONS:
+       case LyXRC::RC_PRINTFILEEXTENSION:
+       case LyXRC::RC_PRINTLANDSCAPEFLAG:
+       case LyXRC::RC_PRINTODDPAGEFLAG:
+       case LyXRC::RC_PRINTPAGERANGEFLAG:
+       case LyXRC::RC_PRINTPAPERDIMENSIONFLAG:
+       case LyXRC::RC_PRINTPAPERFLAG:
+       case LyXRC::RC_PRINTREVERSEFLAG:
+       case LyXRC::RC_PRINTSPOOL_COMMAND:
+       case LyXRC::RC_PRINTSPOOL_PRINTERPREFIX:
+       case LyXRC::RC_PRINTTOFILE:
+       case LyXRC::RC_PRINTTOPRINTER:
+       case LyXRC::RC_PRINT_ADAPTOUTPUT:
+       case LyXRC::RC_PRINT_COMMAND:
+       case LyXRC::RC_RTL_SUPPORT:
+       case LyXRC::RC_SCREEN_DPI:
+       case LyXRC::RC_SCREEN_FONT_ENCODING:
+       case LyXRC::RC_SCREEN_FONT_ROMAN:
+       case LyXRC::RC_SCREEN_FONT_ROMAN_FOUNDRY:
+       case LyXRC::RC_SCREEN_FONT_SANS:
+       case LyXRC::RC_SCREEN_FONT_SANS_FOUNDRY:
+       case LyXRC::RC_SCREEN_FONT_SCALABLE:
+       case LyXRC::RC_SCREEN_FONT_SIZES:
+       case LyXRC::RC_SCREEN_FONT_TYPEWRITER:
+       case LyXRC::RC_SCREEN_FONT_TYPEWRITER_FOUNDRY:
+       case LyXRC::RC_SCREEN_ZOOM:
+       case LyXRC::RC_SERVERPIPE:
+       case LyXRC::RC_SET_COLOR:
+       case LyXRC::RC_SHOW_BANNER:
+       case LyXRC::RC_SPELL_COMMAND:
+       case LyXRC::RC_TEMPDIRPATH:
+       case LyXRC::RC_TEMPLATEPATH:
+       case LyXRC::RC_UIFILE:
+       case LyXRC::RC_USER_EMAIL:
+       case LyXRC::RC_USER_NAME:
+       case LyXRC::RC_USETEMPDIR:
+       case LyXRC::RC_USE_ALT_LANG:
+       case LyXRC::RC_USE_ESC_CHARS:
+       case LyXRC::RC_USE_INP_ENC:
+       case LyXRC::RC_USE_PERS_DICT:
+       case LyXRC::RC_USE_SPELL_LIB:
+       case LyXRC::RC_VIEWDVI_PAPEROPTION:
+       case LyXRC::RC_VIEWER:
+       case LyXRC::RC_WHEEL_JUMP:
+       case LyXRC::RC_LAST:
+               break;
+       }
+}
+
+} // namespace anon