added <FG> command and special Q-Register "$" to set and get the current working directory

 * FG stands for "Folder Go"
 * FG behaves similar to a Unix shell `cd`.
   Without arguments, it changes to the $HOME directory.
 * The $HOME directory was previously only used by $SCITECOCONFIG on Unix.
   Now it is documented on its own, since the HOME directory should also
   be configurable on Windows - e.g. to adapt SciTECO to a MinGW or Cygwin
   installation.
   HOME is initialized just like the other environment variables.
   This also means that now, the $HOME Q-Register is always defined
   and can be used by platform-agnostic macros.
 * FG uses a new kind of tab-completion: for directories only.
   It would be annoying to complete the FG command after every
   directory, so this tab-completion does not close the command
   automatically. Theoretically, it would be possible to close
   the command after completing a directory with no subdirectories,
   but this is not supported currently.
 * Filename arguments are no longer completed with " " if {} escaping
   is in place as this brings no benefit. Instead no completion character
   is inserted for this escape mode.
 * "$" was mapped to the current directory to support an elegant way to
   insert/get the current directory.
   Also this allows the idiom "[$ FG...new_dir...$ ]$" for changing
   the current directory temporarily.
 * The Q-Register stack was extended to support restoring the string
   part of special Q-Registers (that overwrite the default functionality)
   when using the "[$" and "]$" commands.
 * fixed minor typos (american spelling)

1 files changed, 23 insertions, 0 deletions

diff --git a/src/ioview.h b/src/ioview.h
index d314138..d9d8265 100644
--- a/src/ioview.h
+++ b/src/ioview.h
@@ -22,6 +22,7 @@
 
 #include <glib.h>
 #include <glib/gstdio.h>
+#include <glib/gprintf.h>
 
 #include "sciteco.h"
 #include "interface.h"
@@ -43,6 +44,28 @@ namespace SciTECO {
  */
 gchar *get_absolute_path(const gchar *path);
 
+/**
+ * Normalize path or file name.
+ *
+ * This changes the directory separators
+ * to forward slash (on platforms that support
+ * different directory separator styles).
+ *
+ * @param path The path to normalize.
+ *             It is changed in place.
+ * @return Returns `path`. The return value
+ *         may be ignored.
+ */
+static inline gchar *
+normalize_path(gchar *path)
+{
+#if G_DIR_SEPARATOR != '/'
+	return g_strdelimit(path, G_DIR_SEPARATOR_S, '/');
+#else
+	return path;
+#endif
+}
+
 bool file_is_visible(const gchar *path);
 
 /**