compiling not tested. two patches from angus with some small fixes

git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@1220 a592a061-630c-0410-9148-cb99ea01b6c8

ANNOUNCE

@@ -73,7 +73,7 @@ The source code package is available at:
 and at the mirrors listed above.
 
 You need to have XForms version 0.88 or newer to compile your own 
-version.  Version 0.88 is highly recomended. LyX should also compile
+version.  Version 0.88 is highly recommended. LyX should also compile
 with 0.89.
 
 Credits

ChangeLog

@@ -1,3 +1,62 @@
+2000-11-15  Angus Leeming <a.leeming@ic.ac.uk>
+
+	* src/ColorHandler.[Ch]: removed some header files from .h file.
+	Included LColor.h in .C file.
+
+	* src/LColor.[Ch]: made class copyable so that I could create a
+	system_lcolor instance.
+
+	* src/Painter.h: removed LColor.h.
+
+	* src/lyx_gui.C (create_forms): used AddName.
+
+	* src/lyx_main.C (init): copied lcolor to system_lcolr prior to reading
+	of user preferences/lyxrc file.
+
+	* src/lyxrc.C (output): output changes to lcolor.
+
+	* src/frontends/xforms/Color.[Ch]: Changed X11Color to a new struct,
+	NamedColor.
+	Moved class xformColor to files xform_helpers.[Ch]. These files,
+	Color.[Ch], could now be moved into src if they would be useful to
+	other GUIs.
+
+	* src/frontends/xforms/xform_helpers.[Ch]: moved class XformColor here.
+	Also moved FormPreferences::browseFile here as it can be used by any
+	xform dialog with a "Browse" button. FormGraphics is a perfect example.
+
+	* src/support/filetools.[Ch] (WriteableDir, ReadableDir, WriteableFile,
+	ReadableFile): changed the FormPreferences methods a little and moved
+	them here as they'll be useful elsewhere also.
+
+	* src/frontends/xforms/FormPreferences.h: a bit more cleaning up.
+	Removed some header files and used forward declarations instead.
+	Better commenting.
+	Removed some methods as they'll be useful elsewhere (see above).
+
+	* src/frontends/xforms/FormPreferences.C: a bit more cleaning up.
+	Can also now modify the LyX LColors. However, for reasons that I don't
+	yet understand, it appears that we can use
+	LyXFunc::Dispatch(LFUN_SET_COLOR, arg) only when we have a buffer
+	present. The problem appears to lie in ColorHandler, because I can
+	change the color using LColor.SetColor(). Similarly, when reading in a
+	preferences file with some set_color instances, I'll get a warning
+	like: Color sea green is undefined or may not be redefined 
+	Bad lyxrc set_color for sea green
+
+	Once the buffer is loaded, however, I can happily change to this color.
+
+	Finally, it appears that I have to set the color of "inset frame"
+	explicitly, or it oscillates from "black" to "indian red" with each
+	successive "Apply".
+                                           
+2000-11-15  Angus Leeming <a.leeming@ic.ac.uk>
+
+	* ANNOUNCE: corrected a spelling mistake.
+	
+	* src/tabular.C (OldFormatRead): variable "h" was set but never used.
+	Removed.
+
 2000-11-15  Lars Gullik Bjønnes  <larsbj@lyx.org>
 
 	* src/kbsequence.C (addkey): use a vector as per Andre Poenitz patch.

config/lyxinclude.m4

@@ -196,16 +196,16 @@ dnl Check the version of g++
   fi
   if test x$with_warnings = xyes ; then
     case $gxx_version in
-	2.95.*) CXXFLAGS="$CXXFLAGS -W -Wall -Wconversion -Winline";;
+	2.95.*) CXXFLAGS="$CXXFLAGS -W -Wall";;
-	2.96*)  CXXFLAGS="$CXXFLAGS -W -Wall -Wconversion -Winline";;
+	2.96*)  CXXFLAGS="$CXXFLAGS -W -Wall";;
-	2.97*)  CXXFLAGS="$CXXFLAGS -W -Wall -Wconversion -Winline";;
+	2.97*)  CXXFLAGS="$CXXFLAGS -W -Wall";;
-	*)      CXXFLAGS="$CXXFLAGS -W -Wall -Wno-return-type";;
+	*)      CXXFLAGS="$CXXFLAGS -W -Wall";;
     esac
     if test $lyx_devel_version = yes ; then
 	case $gxx_version in
-	    2.95.*) ;;
+	    2.95.*) CXXFLAGS="$CXXFLAGS -Wconversion -Winline";;
-	    2.96*) ;;
+	    2.96*) CXXFLAGS="$CXXFLAGS -Wconversion -Winline";;
-	    2.97*) ;;
+	    2.97*) CXXFLAGS="$CXXFLAGS -Wconversion -Winline";;
 	    *2.91*) ;;
 	    *) CXXFLAGS="$CXXFLAGS -pedantic";;
         esac

src/ColorHandler.C

@@ -20,6 +20,7 @@
 #include "debug.h"
 
 #include "ColorHandler.h"
+#include "LColor.h"
 #include "gettext.h"
 
 using std::endl;

src/ColorHandler.h

@@ -18,9 +18,7 @@
 // This is only included to provide stuff for the non-public sections
 #include <X11/Xlib.h>
 
-#include <map>
 #include "PainterBase.h"
-#include "LColor.h"
 
 class LyXFont;
 class WorkArea;

src/LColor.C

@@ -214,3 +214,5 @@ LColor::color LColor::getFromLyXName(string const & lyxname) const
 
 // The evil global LColor instance
 LColor lcolor;
+// An equally evil global system LColor instance
+LColor system_lcolor;

src/LColor.h

@@ -32,7 +32,10 @@
   - A logical color, such as no color, inherit, math
 
   */
-class LColor : public noncopyable {
+class LColor //: public noncopyable {
+// made copyable for same reasons as LyXRC was made copyable. See there for
+// explanation.
+{
 public:
 	/// Names of colors, including all logical colors
 	enum color {
@@ -216,5 +219,7 @@ private:
 
 ///
 extern LColor lcolor;
+///
+extern LColor system_lcolor;
 
 #endif

src/Painter.h

@@ -22,7 +22,6 @@
 #include <X11/Xlib.h>
 
 #include "PainterBase.h"
-#include "LColor.h"
 
 class LyXFont;
 class WorkArea;

src/PainterBase.h

@@ -94,7 +94,7 @@ public:
 	virtual PainterBase & fillPolygon(
 		int const * xp, int const * yp,
 		int np,
-		LColor::color =LColor::foreground) = 0;
+		LColor::color = LColor::foreground) = 0;
 
 	/// Draw lines from x1,y1 to x2,y2. They are arrays
         virtual PainterBase & segments(

src/frontends/xforms/Color.C

@@ -18,13 +18,10 @@
 
 #include <algorithm> // max
 #include <cmath> // floor
-#include <fstream> // ofstream
 #include "Color.h"
-#include "lyxlex.h"
 
 using std::max;
 using std::min;
-using std::ofstream;
 
 static int const nohue = -1;
 
@@ -131,92 +128,3 @@ HSVColor::HSVColor(RGBColor const & rgb)
 			h += 360;
 	}
 }
-
-
-// sorted by hand to prevent LyXLex from complaining on read().
-static
-keyword_item xformTags[] = {
-//	{ "\\gui_active_tab", FL_LIGHTER_COL1 },
-	{ "\\gui_background", FL_COL1 },
-	{ "\\gui_buttonbottom", FL_BOTTOM_BCOL },
-	{ "\\gui_buttonleft", FL_LEFT_BCOL },
-	{ "\\gui_buttonright", FL_RIGHT_BCOL },
-	{ "\\gui_buttontop", FL_TOP_BCOL },
-	{ "\\gui_inactive", FL_INACTIVE },
-	{ "\\gui_push_button", FL_YELLOW },
-	{ "\\gui_selected", FL_MCOL },	
-	{ "\\gui_text", FL_BLACK }
-};
-
-
-static const int xformCount = sizeof(xformTags) / sizeof(keyword_item);
-
-
-bool XformColor::read(string const & filename)
-{
-	LyXLex lexrc(xformTags, xformCount);
-	if (!lexrc.setFile(filename))
-		return false;
-
-	while (lexrc.IsOK()) {
-		int const le = lexrc.lex();
-
-		switch (le) {
-		case LyXLex::LEX_UNDEF:
-			lexrc.printError("Unknown tag `$$Token'");
-			continue; 
-		case LyXLex::LEX_FEOF:
-			continue;
-		default: break;
-		}
-
-		RGBColor col;
-
-		if (!lexrc.next()) break;
-		col.r = lexrc.GetInteger();
-
-		if (!lexrc.next()) break;
-		col.g = lexrc.GetInteger();
-
-		if (!lexrc.next()) break;
-		col.b = lexrc.GetInteger();
-
-		fl_mapcolor(le, col.r, col.g, col.b);
-	}
-	
-	return true;
-}
-
-
-bool XformColor::write(string const & filename)
-{
-	ofstream os(filename.c_str());
-	if (!os)
-		return false;
-
-	os << "### This file is part of\n"
-	   << "### ========================================================\n"
-	   << "###          LyX, The Document Processor\n"
-	   << "###\n"
-	   << "###          Copyright 1995 Matthias Ettrich\n"
-	   << "###          Copyright 1995-2000 The LyX Team.\n"
-	   << "###\n"
-	   << "### ========================================================\n"
-	   << "\n"
-	   << "# This file is written by LyX, if you want to make your own\n"
-	   << "# modifications you should do them from inside LyX and save\n"
-	   << "\n";
-
-	for (int i = 0; i < xformCount; ++i) {
-		string const tag  = xformTags[i].tag;
-		int const colorID = xformTags[i].code;
-		RGBColor color;
-
-		fl_getmcolor(colorID, &color.r, &color.g, &color.b);
-
-		os << tag << " "
-		   << color.r << " " << color.g << " " << color.b << "\n";
-	}
-
-	return true;
-}

src/frontends/xforms/Color.h

@@ -12,8 +12,6 @@
 #ifndef COLOR_H
 #define COLOR_H
 
-#include <utility> // for pair
-
 #ifdef __GNUG_
 #pragma interface
 #endif
@@ -42,17 +40,13 @@ struct RGBColor {
 	RGBColor(HSVColor const &);
 };
 
-typedef std::pair<string, RGBColor> X11Color;
+struct NamedColor : public RGBColor {
-
-/// struct holding xform-specific colors
-struct XformColor {
 	string name;
-	int colorID;
+	NamedColor() : RGBColor() {}
-	RGBColor col;
+	NamedColor(string const & n, RGBColor const & c )
-	XformColor() : colorID(0) {}
+		: RGBColor(c), name(n) {}
+	RGBColor const & color() const { return *this; }
 	string const & getname() const { return name; }
-	static bool read(string const &);
-	static bool write(string const &);
 };
 
 inline

src/frontends/xforms/FormPreferences.h

@@ -18,10 +18,7 @@
 #define FORMPREFERENCES_H
 
 #include <utility> // for pair
-
 #include "FormBase.h"
-#include "Color.h"
-#include "LString.h"
 
 #ifdef __GNUG_
 #pragma interface
@@ -32,6 +29,9 @@ class Command;
 class Dialogs;
 class Format;
 class LyXView;
+class NamedColor;
+class RGBColor;
+class XformColor;
 struct FD_form_colors;
 struct FD_form_converters;
 struct FD_form_formats;
@@ -67,9 +67,9 @@ private:
 	virtual void redraw();
 	/// Update the dialog.
 	virtual void update();
-	///
+	/// Hide the dialog.
 	virtual void hide();
-	/// OK from dialog
+	/// OK (Save) from dialog
 	virtual void ok();
 	/// Apply from dialog
 	virtual void apply();
@@ -77,48 +77,25 @@ private:
 	virtual bool input(FL_OBJECT *, long);
 	/// Build the dialog
 	virtual void build();
-	/// control which feedback message is output
+	/// Pointer to the actual instantiation of xform's form.
-	void feedback( FL_OBJECT * );
-	/// The handler for the preemptive feedback
-	void Feedback(FL_OBJECT *, int);
-	///
 	virtual FL_FORM * form() const;
+	/// control which feedback message is output
+	void feedback(FL_OBJECT *);
 
-	/** Helper functions available to the various tab folders.
+       	/// Set the preemptive handler for each FL_OBJECT.
-	 */
+	static void setPreHandler(FL_OBJECT *);
-
+	/// The preemptive handler for feedback messages.
-	///
+	void Feedback(FL_OBJECT *, int);
-	bool WriteableDir( string const & );
+	/// Print a warning message and set warning flag.
-	///
-	bool ReadableDir( string const & );
-	///
-	bool WriteableFile( string const &, string const & = string() );
-	///
-	bool ReadableFile( string const &, string const & = string() );
-	///
-	void setPreHandler( FL_OBJECT * ) const;
-	///
 	void printWarning( string const & );
-
+	/** Launch a file dialog and modify input if it returns a new file.
-	/** title: filedlg title, pattern: *.ps etc
+	    For an explanation of the various parameters, see xform_helpers.h.
-	    extra buttons on filedlg: dir1 = (name, dir), dir2 = (name, dir)
 	 */
+	void browse( FL_OBJECT * input,
+		     string const & title, string const & pattern, 
+		     std::pair<string,string> const & dir1,
+		     std::pair<string,string> const & dir2 );
 	
-	///
-	bool browse(FL_OBJECT * input,
-		    string const & title, string const & pattern, 
-		    std::pair<string,string> const & dir1 //=
-		    //std::pair<string,string>()
-		    ,
-		    std::pair<string,string> const & dir2 //=
-		    //std::pair<string,string>()
-		);
-	/// called from browse()
-	string const browseFile( string const & filename,
-				 string const & title, string const & pattern, 
-				 std::pair<string,string> const & dir1,
-				 std::pair<string,string> const & dir2 ) const;
-
 	/// Type definitions from the fdesign produced header file.
 	FD_form_preferences * build_preferences();
 	///
@@ -214,7 +191,7 @@ private:
 		///
 		FD_form_colors * dialog_;
 		/// A vector of RGB colors and associated name.
-		static std::vector<X11Color> colorDB;
+		static std::vector<NamedColor> colorDB;
 		/// A vector of xform RGB colors and associated name.
 		static std::vector<XformColor> xformColorDB;
 	};
@@ -225,7 +202,7 @@ private:
 	class Converters {
 	public:
 		///
-		Converters( FormPreferences &  p ) : parent_(p), dialog_(0) {}
+		Converters( FormPreferences & p ) : parent_(p), dialog_(0) {}
 		///
 		~Converters();
 		///
@@ -565,7 +542,6 @@ private:
 	///
 	friend class SpellChecker;
 
-	
 	/** The tab folders.
 	 */
 	

src/frontends/xforms/xform_helpers.C

@@ -11,7 +11,16 @@
 
 #include <vector>
 #include "xform_helpers.h"
+#include <fstream> // ofstream
+#include "lyxlex.h"
+#include "filedlg.h" // LyXFileDlg
+#include "support/FileInfo.h"
+#include "support/filetools.h"
+#include "lyx_gui_misc.h" // WriteAlert
+#include "gettext.h"
 
+using std::ofstream;
+using std::pair;
 using std::vector;
 
 // Take a string and add breaks so that it fits into a desired label width, w
@@ -58,3 +67,141 @@ string formatted( string const & sin, int w, int size, int style )
 	
 	return sout;
 }
+
+
+string const browseFile( string const & filename,
+			 string const & title,
+			 string const & pattern, 
+			 pair<string,string> const & dir1,
+			 pair<string,string> const & dir2 )
+{
+	string lastPath = ".";
+	if( !filename.empty() ) lastPath = OnlyPath(filename);
+
+	LyXFileDlg fileDlg;
+
+	if( !dir1.second.empty() ) {
+		FileInfo fileInfo( dir1.second );
+		if( fileInfo.isOK() && fileInfo.isDir() )
+			fileDlg.SetButton( 0, dir1.first, dir1.second );
+	}
+
+	if( !dir2.second.empty() ) {
+		FileInfo fileInfo( dir2.second );
+		if( fileInfo.isOK() && fileInfo.isDir() )
+		    fileDlg.SetButton( 1, dir2.first, dir2.second );
+	}
+
+	bool error = false;
+	string buf;
+	do {
+		string p = fileDlg.Select(title,
+		                          lastPath,
+		                          pattern, filename );
+
+		if (p.empty()) return p;
+
+		lastPath = OnlyPath(p);
+
+		if (p.find_first_of("#~$% ") != string::npos) {
+			WriteAlert(_("Filename can't contain any "
+			             "of these characters:"),
+			           _("space, '#', '~', '$' or '%'."));
+			error = true;
+		} else {
+			error = false;
+			buf = p;
+		}
+	} while (error);
+
+	return buf;
+}
+
+
+// sorted by hand to prevent LyXLex from complaining on read().
+static
+keyword_item xformTags[] = {
+//	{ "\\gui_active_tab", FL_LIGHTER_COL1 },
+	{ "\\gui_background", FL_COL1 },
+	{ "\\gui_buttonbottom", FL_BOTTOM_BCOL },
+	{ "\\gui_buttonleft", FL_LEFT_BCOL },
+	{ "\\gui_buttonright", FL_RIGHT_BCOL },
+	{ "\\gui_buttontop", FL_TOP_BCOL },
+	{ "\\gui_inactive", FL_INACTIVE },
+	{ "\\gui_push_button", FL_YELLOW },
+	{ "\\gui_selected", FL_MCOL },	
+	{ "\\gui_text", FL_BLACK }
+};
+
+
+static const int xformCount = sizeof(xformTags) / sizeof(keyword_item);
+
+
+bool XformColor::read(string const & filename)
+{
+	LyXLex lexrc(xformTags, xformCount);
+	if (!lexrc.setFile(filename))
+		return false;
+
+	while (lexrc.IsOK()) {
+		int const le = lexrc.lex();
+
+		switch (le) {
+		case LyXLex::LEX_UNDEF:
+			lexrc.printError("Unknown tag `$$Token'");
+			continue; 
+		case LyXLex::LEX_FEOF:
+			continue;
+		default: break;
+		}
+
+		RGBColor col;
+
+		if (!lexrc.next()) break;
+		col.r = lexrc.GetInteger();
+
+		if (!lexrc.next()) break;
+		col.g = lexrc.GetInteger();
+
+		if (!lexrc.next()) break;
+		col.b = lexrc.GetInteger();
+
+		fl_mapcolor(le, col.r, col.g, col.b);
+	}
+	
+	return true;
+}
+
+
+bool XformColor::write(string const & filename)
+{
+	ofstream os(filename.c_str());
+	if (!os)
+		return false;
+
+	os << "### This file is part of\n"
+	   << "### ========================================================\n"
+	   << "###          LyX, The Document Processor\n"
+	   << "###\n"
+	   << "###          Copyright 1995 Matthias Ettrich\n"
+	   << "###          Copyright 1995-2000 The LyX Team.\n"
+	   << "###\n"
+	   << "### ========================================================\n"
+	   << "\n"
+	   << "# This file is written by LyX, if you want to make your own\n"
+	   << "# modifications you should do them from inside LyX and save\n"
+	   << "\n";
+
+	for (int i = 0; i < xformCount; ++i) {
+		string const tag  = xformTags[i].tag;
+		int const colorID = xformTags[i].code;
+		RGBColor color;
+
+		fl_getmcolor(colorID, &color.r, &color.g, &color.b);
+
+		os << tag << " "
+		   << color.r << " " << color.g << " " << color.b << "\n";
+	}
+
+	return true;
+}

src/frontends/xforms/xform_helpers.h

@@ -5,10 +5,32 @@
 #pragma interface
 #endif
 
+#include <utility> // pair
 #include <config.h>
 #include "LString.h"
+#include "Color.h"
 
 // Take a string and add breaks so that it fits into a desired label width, w
 string formatted( string const &label, int w, int size, int style );
 
+/** Launch a file dialog and return the chosen file.
+    filename: a suggested filename.
+    title: the title of the dialog.
+    pattern: *.ps etc.
+    dir1 = (name, dir), dir2 = (name, dir): extra buttons on the dialog.
+*/
+string const browseFile( string const & filename,
+			 string const & title,
+			 string const & pattern, 
+			 std::pair<string,string> const & dir1,
+			 std::pair<string,string> const & dir2 );
+
+/// struct holding xform-specific colors
+struct XformColor : public NamedColor {
+	int colorID;
+	XformColor() : NamedColor(), colorID(0) {}
+	static bool read(string const &);
+	static bool write(string const &);
+};
+
 #endif

src/lyx_gui.C

@@ -42,7 +42,7 @@
 #include "language.h"
 #include "ColorHandler.h"
 #include "frontends/GUIRunTime.h"
-#include "frontends/xforms/Color.h"
+#include "frontends/xforms/xform_helpers.h" // for XformColor
 
 using std::endl;
 
@@ -373,7 +373,7 @@ void LyXGUI::create_forms()
 	// This is probably as good a time as any to map the xform colours,
 	// should a mapping exist.
 	{
-		string filename = user_lyxdir + "/preferences.xform";
+		string filename = AddName(user_lyxdir, "preferences.xform");
 		XformColor::read( filename );
 	}
 	

src/lyx_main.C

@@ -402,6 +402,7 @@ void LyX::init(int */*argc*/, char **argv, bool gui)
 	system_lyxrc = lyxrc;
 	system_formats = formats;
 	system_converters = converters;
+	system_lcolor = lcolor;
 
 	// If there is a preferences file we read that instead
 	// of the old lyxrc file.

src/lyxrc.C

@@ -1158,9 +1158,20 @@ void LyXRC::output(ostream & os) const
 			os << "\n";
 		}
 		
-	//case RC_SET_COLOR:
+		os << "\n#\n"
-		// color bindings not written to preference file.
+		   << "# COLOR SECTION ###################################\n"
-		// And we want to be warned about that. (Lgb)
+		   << "#\n\n";
+		
+	case RC_SET_COLOR:
+		for( int i=0; i<LColor::ignore; ++i ) {
+			LColor::color lc = static_cast<LColor::color>(i);
+
+			if (lcolor.getX11Name(lc) !=
+			    system_lcolor.getX11Name(lc)) {
+				os << "\\set_color \"" << lcolor.getX11Name(lc)
+				   << "\"\n";
+			}
+		}
 		
 		os << "\n#\n"
 		   << "# PRINTER SECTION ###################################\n"

src/support/filetools.C

@@ -1135,3 +1135,151 @@ void removeAutosaveFile(string const & filename)
 		}
 	}
 }
+
+
+bool WriteableDir(string const & name, string & errorMessage)
+{
+	errorMessage.erase();
+
+	if (!AbsolutePath(name)) {
+		errorMessage = N_("The absolute path is required.");
+		return false;
+	}
+
+	FileInfo const tp(name);
+	if (!tp.isDir()) {
+		errorMessage = N_("Directory does not exist.");
+		return false;
+	}
+
+	if (!tp.writable()) {
+		errorMessage = N_("Cannot write to this directory.");
+		return false;
+	}
+
+	return true;
+}
+
+
+bool ReadableDir(string const & name, string & errorMessage)
+{
+	errorMessage.erase();
+
+	if (!AbsolutePath(name)) {
+		errorMessage = N_("The absolute path is required.");
+		return false;
+	}
+
+	FileInfo const tp(name);
+	if (!tp.isDir()) {
+		errorMessage = N_("Directory does not exist.");
+		return false;
+	}
+
+	if (!tp.readable()) {
+		errorMessage = N_("Cannot read this directory.");
+		return false;
+	}
+
+	return true;
+}
+
+
+bool WriteableFile(string const & name, string & errorMessage)
+{
+	// A writeable file is either:
+	// * An existing file to which we have write access, or
+	// * A file that doesn't yet exist but that would exist in a writeable
+	//   directory.
+
+	errorMessage.erase();
+
+	if (name.empty()) {
+		errorMessage = N_("No file input.");
+		return false;
+	}
+
+	string const dir = OnlyPath(name);
+	if (!AbsolutePath(dir)) {
+		errorMessage = N_("The absolute path is required.");
+		return false;
+	}
+
+	FileInfo d(name);
+	if (!d.isDir()) {
+		d.newFile(dir);
+	}
+
+	if (!d.isDir()) {
+		errorMessage = N_("Directory does not exist.");
+		return false;
+	}
+	
+	if (!d.writable()) {
+		errorMessage = N_("Cannot write to this directory.");
+		return false;
+	}
+
+	FileInfo f(name);
+	if (dir == name || f.isDir()) {
+		errorMessage = N_("A file is required, not a directory.");
+		return false;
+	}
+
+	if (f.exist() && !f.writable()) {
+		errorMessage = N_("Cannot write to this file.");
+		return false;
+	}
+	
+	return true;
+}
+
+
+bool ReadableFile(string const & name, string & errorMessage)
+{
+	errorMessage.erase();
+
+	if (name.empty()) {
+		errorMessage = N_("No file input.");
+		return false;
+	}
+
+	string const dir = OnlyPath(name);
+	if (!AbsolutePath(dir)) {
+		errorMessage = N_("The absolute path is required.");
+		return false;
+	}
+
+	FileInfo d(name);
+	if (!d.isDir()) {
+		d.newFile(dir);
+	}
+
+	if (!d.isDir()) {
+		errorMessage = N_("Directory does not exist.");
+		return false;
+	}
+	
+	if (!d.readable()) {
+		errorMessage = N_("Cannot read from this directory.");
+		return false;
+	}
+
+	FileInfo f(name);
+	if (dir == name || f.isDir()) {
+		errorMessage = N_("A file is required, not a directory.");
+		return false;
+	}
+
+	if (!f.exist()) {
+		errorMessage = N_("File does not exist.");
+		return false;
+	}
+	
+	if (!f.readable()) {
+		errorMessage = N_("Cannot read from this file.");
+		return false;
+	}
+
+	return true;
+}

src/support/filetools.h

@@ -199,10 +199,22 @@ string const ReplaceEnvironmentPath(string const & path);
    Returns true if successful */
 bool LyXReadLink(string const & file, string & Link);
 
-/* Uses kpsewhich to find tex files */
+/// Uses kpsewhich to find tex files
 string const findtexfile(string const & fil, string const & format);
 
-/* remove the autosave-file and give a Message if it can't be done */
+/// remove the autosave-file and give a Message if it can't be done
 void removeAutosaveFile(string const & filename);
 
+/** Perform some quite detailed tests to ascertain whether the directory or
+    file is readable or writeable. If not, then an error message is returned.
+*/
+///
+bool WriteableDir(string const & dir, string & errorMessage);
+///
+bool ReadableDir(string const & dir, string & errorMessage);
+///
+bool WriteableFile(string const & file, string & errorMessage);
+///
+bool ReadableFile(string const & file, string & errorMessage);
+
 #endif

src/tabular.C

@@ -1262,7 +1262,6 @@ void LyXTabular::OldFormatRead(LyXLex & lex, string const & fl)
     int e = 0;
     int f = 0;
     int g = 0;
-    int h = 0;
 	
     istream & is = lex.getStream();
     string s(fl);
@@ -1314,7 +1313,7 @@ void LyXTabular::OldFormatRead(LyXLex & lex, string const & fl)
 	endfoot = c;
 	endlastfoot = d;
 	for (i = 0; i < rows_; ++i) {
-	    a = b = c = d = e = f = g = h = 0;
+	    a = b = c = d = e = f = g = 0;
 	    is >> a >> b >> c >> d;
 	    row_info[i].top_line = a;
 	    row_info[i].bottom_line = b;