X-Git-Url: https://git.lyx.org/gitweb/?a=blobdiff_plain;f=src%2FExporter.cpp;h=073842f2806213c9deeec12add2b61ba351a7c6f;hb=56f525cec31fb0b489928e61116e14a86444cdd1;hp=85d5eb3d5551862f7791fc21897651da4124a5bc;hpb=3ad3ad71357e24dc49729a9ad34d6896b22dc8d9;p=lyx.git

diff --git a/src/Exporter.cpp b/src/Exporter.cpp
index 85d5eb3d55..073842f280 100644
--- a/src/Exporter.cpp
+++ b/src/Exporter.cpp
@@ -36,23 +36,26 @@ namespace lyx {
 
 namespace Alert = frontend::Alert;
 
-/// ask the user what to do if a file already exists
+/// Ask the user what to do if a file already exists
 static int checkOverwrite(FileName const & filename)
 {
 	if (!filename.exists())
-		return 0;
+		return 1;
+
 	docstring text = bformat(_("The file %1$s already exists.\n\n"
-							 "Do you want to overwrite that file?"),
-						makeDisplayPath(filename.absFilename()));
+				   "Do you want to overwrite that file?"),
+				   makeDisplayPath(filename.absFileName()));
 	return Alert::prompt(_("Overwrite file?"),
-					 text, 0, 2,
-					 _("&Overwrite"), _("Overwrite &all"),
-					 _("&Cancel export"));
+				text, 0, 3,
+				_("&Keep file"), _("&Overwrite"),
+				_("Overwrite &all"), _("&Cancel export"));
 }
 
 
 /** copy file \p sourceFile to \p destFile. If \p force is false, the user
- *  will be asked before existing files are overwritten.
+ *  will be asked before existing files are overwritten. If \p only_tmp
+ *  is true, then only copy files that are in our tmp dir (to avoid other files
+ *  overwriting themselves).
  *  \return
  *  - SUCCESS if this file got copied
  *  - FORCE   if subsequent calls should not ask for confirmation before
@@ -61,23 +64,27 @@ static int checkOverwrite(FileName const & filename)
  */
 CopyStatus copyFile(string const & format,
 		    FileName const & sourceFile, FileName const & destFile,
-		    string const & latexFile, bool force)
+		    string const & latexFile, bool force, bool only_tmp)
 {
 	CopyStatus ret = force ? FORCE : SUCCESS;
 
-	// Only copy files that are in our tmp dir, all other files would
-	// overwrite themselves. This check could be changed to
+	// This check could be changed to
 	// boost::filesystem::equivalent(sourceFile, destFile) if export to
 	// other directories than the document directory is desired.
-	if (!prefixIs(onlyPath(sourceFile.absFilename()), package().temp_dir().absFilename()))
+	// Also don't overwrite files that already exist and are identical
+	// to the source files.
+	if ((only_tmp && !prefixIs(onlyPath(sourceFile.absFileName()), package().temp_dir().absFileName()))
+	    || sourceFile.checksum() == destFile.checksum())
 		return ret;
 
 	if (!force) {
 		switch(checkOverwrite(destFile)) {
 		case 0:
+			return SUCCESS;
+		case 1:
 			ret = SUCCESS;
 			break;
-		case 1:
+		case 2:
 			ret = FORCE;
 			break;
 		default:
@@ -89,8 +96,8 @@ CopyStatus copyFile(string const & format,
 	if (!mover.copy(sourceFile, destFile, latexFile))
 		Alert::error(_("Couldn't copy file"),
 			     bformat(_("Copying %1$s to %2$s failed."),
-				     makeDisplayPath(sourceFile.absFilename()),
-				     makeDisplayPath(destFile.absFilename())));
+				     makeDisplayPath(sourceFile.absFileName()),
+				     makeDisplayPath(destFile.absFileName())));
 
 	return ret;
 }
@@ -125,7 +132,7 @@ void ExportData::addExternalFile(string const & format,
 void ExportData::addExternalFile(string const & format,
 				 FileName const & sourceName)
 {
-	addExternalFile(format, sourceName, onlyFilename(sourceName.absFilename()));
+	addExternalFile(format, sourceName, onlyFileName(sourceName.absFileName()));
 }