Added a "Save as" dialog and made fped disable "Save" if working on a manually

created file. This is a precaution against accidently saving to a manual work,
which would change the structure and remove all comments.

- fped.h, fped.c, file.c: moved declaration of save_file_name into shared 
  header
- dump.h, dump.c (MACHINE_GENERATED): moved header marking machine-generated
  files into shared macro
- gui.c (save_as_fpd): added "Save as" dialog
- fped.h, fped.c (load_file), gui.c: disable "Save" if editing a file that 
  doesn't have the machine-generated header



git-svn-id: http://svn.openmoko.org/trunk/eda/fped@5922 99fdad57-331a-0410-800a-d7fa5415bdb3

dump.c

@@ -536,7 +536,7 @@ int dump(FILE *file)
 {
 	struct frame *frame;
 
-	fprintf(file, "/* MACHINE-GENERATED ! */\n\n");
+	fprintf(file, "%s\n", MACHINE_GENERATED);
 	for (frame = frames; frame; frame = frame->next)
 		frame->dumped = 0;
 	for (frame = frames; frame; frame = frame->next) {

dump.h

@@ -1,8 +1,8 @@
 /*
  * dump.h - Dump objects in the native FPD format
  *
- * Written 2009 by Werner Almesberger
+ * Written 2009, 2010 by Werner Almesberger
- * Copyright 2009 by Werner Almesberger
+ * Copyright 2009, 2010 by Werner Almesberger
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -19,6 +19,9 @@
 #include "obj.h"
 
 
+#define MACHINE_GENERATED	"/* MACHINE-GENERATED ! */\n"
+
+
 /*
  * vec       obj
  * --------------------------------------------------------------

file.c

@@ -20,12 +20,9 @@
 #include "dump.h"
 #include "kicad.h"
 #include "postscript.h"
-
 #include "util.h"
 #include "file.h"
-
+#include "fped.h"
-
-extern char *save_file_name;
 
 
 /* ----- general helper functions ------------------------------------------ */

fped.c

@@ -14,6 +14,7 @@
 #include <stdlib.h>
 #include <stdio.h>
 #include <unistd.h>
+#include <errno.h>
 
 #include "cpp.h"
 #include "util.h"
@@ -21,20 +22,37 @@
 #include "obj.h"
 #include "inst.h"
 #include "file.h"
+#include "dump.h"
 #include "gui.h"
 #include "delete.h"
 #include "fpd.h"
+#include "fped.h"
 
 
 char *save_file_name = NULL;
+int no_save = 0;
 
 
 static void load_file(const char *name)
 {
-	if (file_exists(name) == 1) {
+	FILE *file;
+	char line[sizeof(MACHINE_GENERATED)];
+
+	file = fopen(name, "r");
+	if (file) {
+		if (!fgets(line, sizeof(line), file)) {
+			perror(name);
+			exit(1);
+		}
+		no_save = strcmp(line, MACHINE_GENERATED);
+		fclose(file);
 		reporter = report_parse_error;
 		run_cpp_on_file(name);
 	} else {
+		if (errno != ENOENT) {
+			perror(name);
+			exit(1);
+		}
 		scan_empty();
 	}
 	(void) yyparse();

fped.h

@@ -0,0 +1,20 @@
+/*
+ * fped.h - Things fped.c exports
+ *
+ * Written 2010 by Werner Almesberger
+ * Copyright 2010 by Werner Almesberger
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+
+#ifndef FPED_H
+#define FPED_H
+
+extern char *save_file_name;
+extern int no_save;
+
+#endif /* !FPED_H */

gui.c

@@ -23,6 +23,7 @@
 #include "gui_tool.h"
 #include "gui_frame.h"
 #include "gui.h"
+#include "fped.h"
 
 #include "icons/stuff.xpm"
 #include "icons/stuff_off.xpm"
@@ -50,6 +51,33 @@ static GtkWidget *bright_image[2];
 static void do_build_frames(void);
 
 
+/* ----- save callbacks ---------------------------------------------------- */
+
+
+static void save_as_fpd(void)
+{
+	GtkWidget *dialog;
+
+	dialog = gtk_file_chooser_dialog_new("Save File",
+	    NULL, GTK_FILE_CHOOSER_ACTION_SAVE,
+	    GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
+	    GTK_STOCK_SAVE, GTK_RESPONSE_ACCEPT, NULL);
+	gtk_file_chooser_set_do_overwrite_confirmation(
+	    GTK_FILE_CHOOSER(dialog), TRUE);
+	if (save_file_name)
+		gtk_file_chooser_set_filename(GTK_FILE_CHOOSER(dialog),
+		    save_file_name);
+	if (gtk_dialog_run(GTK_DIALOG (dialog)) == GTK_RESPONSE_ACCEPT) {
+		save_file_name =
+		    gtk_file_chooser_get_filename(GTK_FILE_CHOOSER(dialog));
+		save_fpd();
+		/* @@@ we may leak save_file_name */
+		no_save = 0;
+	}
+	gtk_widget_destroy(dialog);
+}
+
+
 /* ----- view callbacks ---------------------------------------------------- */
 
 
@@ -68,6 +96,7 @@ static void swap_var_code(void)
 static GtkItemFactoryEntry menu_entries[] = {
 	{ "/File",		NULL,	NULL,	 	0, "<Branch>" },
 	{ "/File/Save",		NULL,	save_fpd,	0, "<Item>" },
+	{ "/File/Save as",	NULL,	save_as_fpd,	0, "<Item>" },
         { "/File/sep1",		NULL,	NULL,		0, "<Separator>" },
         { "/File/Write KiCad",	NULL,	write_kicad,	0, "<Item>" },
         { "/File/Write Postscript",
@@ -95,6 +124,9 @@ static void make_menu_bar(GtkWidget *hbox)
 
 	bar = gtk_item_factory_get_widget(factory, "<FpedMenu>");
 	gtk_box_pack_start(GTK_BOX(hbox), bar, TRUE, TRUE, 0);
+
+	gtk_widget_set_sensitive(
+	    gtk_item_factory_get_item(factory, "/File/Save"), !no_save);
 }
 
 

gui.h

@@ -1,8 +1,8 @@
 /*
  * gui.h - Editor GUI core
  *
- * Written 2009 by Werner Almesberger
+ * Written 2009, 2010 by Werner Almesberger
- * Copyright 2009 by Werner Almesberger
+ * Copyright 2009, 2010 by Werner Almesberger
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -23,6 +23,8 @@ extern int show_stuff;
 extern int show_meas;
 extern int show_bright;
 
+extern int no_save;
+
 
 /* update everything after a model change */
 void change_world(void);