X-Git-Url: https://git.lyx.org/gitweb/?a=blobdiff_plain;f=src%2Fbuffer_funcs.cpp;h=ead443a99ce1987a2d78c4f119591cbd99f49a33;hb=ac46456b288c35a05f716a9e3bbf022f60b2cd9f;hp=3f64b909f2ce827b9b0262131f1c430fe9ac4417;hpb=fdbe775b9f5468e8f53dc83a66583f412b5970fb;p=lyx.git

diff --git a/src/buffer_funcs.cpp b/src/buffer_funcs.cpp
index 3f64b909f2..ead443a99c 100644
--- a/src/buffer_funcs.cpp
+++ b/src/buffer_funcs.cpp
@@ -47,6 +47,7 @@
 #include "support/filetools.h"
 #include "support/gettext.h"
 #include "support/lstrings.h"
+#include "support/mutex.h"
 #include "support/textutils.h"
 
 using namespace std;
@@ -79,7 +80,7 @@ Buffer * checkAndLoadLyXFile(FileName const & filename, bool const acceptDirty)
 			case 0: {
 				// reload the document
 				if (checkBuffer->reload() != Buffer::ReadSuccess)
-					return 0;
+					return nullptr;
 				return checkBuffer;
 			}
 			case 1:
@@ -87,30 +88,36 @@ Buffer * checkAndLoadLyXFile(FileName const & filename, bool const acceptDirty)
 				return checkBuffer;
 			case 2:
 				// cancel
-				return 0;
+				return nullptr;
 		}
 	}
 
 	bool const exists = filename.exists();
 	bool const tryVC = exists ? false : LyXVC::fileInVC(filename);
 	if (exists || tryVC) {
-		if (exists && !filename.isReadableFile()) {
-			docstring text = bformat(_("The file %1$s exists but is not "
-				"readable by the current user."),
-				from_utf8(filename.absFileName()));
-			Alert::error(_("File not readable!"), text);
-			return 0;
+		if (exists) {
+			if (!filename.isReadableFile()) {
+				docstring text = bformat(_("The file %1$s exists but is not "
+					"readable by the current user."),
+					from_utf8(filename.absFileName()));
+				Alert::error(_("File not readable!"), text);
+				return nullptr;
+			}
+			if (filename.extension() == "lyx" && filename.isFileEmpty()) {
+				// Makes it possible to open an empty (0 bytes) .lyx file
+				return newFile(filename.absFileName(), "", true);
+			}
 		}
 		Buffer * b = theBufferList().newBuffer(filename.absFileName());
 		if (!b) {
 			// Buffer creation is not possible.
-			return 0;
+			return nullptr;
 		}
 		if (b->loadLyXFile() != Buffer::ReadSuccess) {
 			// do not save an emergency file when releasing the buffer
 			b->markClean();
 			theBufferList().release(b);
-			return 0;
+			return nullptr;
 		}
 		return b;
 	}
@@ -119,10 +126,10 @@ Buffer * checkAndLoadLyXFile(FileName const & filename, bool const acceptDirty)
 		"exist.\n\nDo you want to create a new document?"),
 		from_utf8(filename.absFileName()));
 	if (!Alert::prompt(_("Create new document?"),
-			text, 0, 1, _("&Create"), _("Cancel")))
+			text, 0, 1, _("&Yes, Create New Document"), _("&No, Do Not Create")))
 		return newFile(filename.absFileName(), string(), true);
 
-	return 0;
+	return nullptr;
 }
 
 
@@ -134,7 +141,7 @@ Buffer * newFile(string const & filename, string const & templatename,
 	Buffer * b = theBufferList().newBuffer(filename);
 	if (!b)
 		// Buffer creation is not possible.
-		return 0;
+		return nullptr;
 
 	FileName tname;
 	// use defaults.lyx as a default template if it exists.
@@ -151,7 +158,7 @@ Buffer * newFile(string const & filename, string const & templatename,
 				file);
 			Alert::error(_("Could not read template"), text);
 			theBufferList().release(b);
-			return 0;
+			return nullptr;
 		}
 	}
 
@@ -172,17 +179,18 @@ Buffer * newFile(string const & filename, string const & templatename,
 Buffer * newUnnamedFile(FileName const & path, string const & prefix,
 						string const & templatename)
 {
-	// FIXME THREAD
 	static map<string, int> file_number;
+	static Mutex mutex;
 
+	Mutex::Locker locker(&mutex);
 	FileName filename;
 
 	do {
-		filename.set(path, 
+		filename.set(path,
 			prefix + convert<string>(++file_number[prefix]) + ".lyx");
 	}
 	while (theBufferList().exists(filename) || filename.isReadableFile());
-		
+
 	return newFile(filename.absFileName(), templatename, false);
 }
 
@@ -192,17 +200,17 @@ Buffer * loadIfNeeded(FileName const & fname)
 	Buffer * buffer = theBufferList().getBuffer(fname);
 	if (!buffer) {
 		if (!fname.exists() && !LyXVC::fileInVC(fname))
-			return 0;
+			return nullptr;
 
 		buffer = theBufferList().newBuffer(fname.absFileName());
 		if (!buffer)
 			// Buffer creation is not possible.
-			return 0;
+			return nullptr;
 
 		if (buffer->loadLyXFile() != Buffer::ReadSuccess) {
 			//close the buffer we just opened
 			theBufferList().release(buffer);
-			return 0;
+			return nullptr;
 		}
 	}
 	return buffer;