Rewrite double click confirmation code.

  Remove the double_click global boolean, and change dc_state to a bit
field, instead of a single state variable.
  The old code was the xedit original code with minimal changes, but was
a bit confusing when two confirmations would be required.
  Also, this patch moves the check for file overwriting before
MaybeCreateFile() as it can actually call creat(), what means that it
can no longer ask for confirmations, as the file has been just backed up,
and a zero sized one created.

1 files changed, 43 insertions, 60 deletions

diff --git a/commands.c b/commands.c
index fd66200..4461218 100644
--- a/commands.c
+++ b/commands.c
@@ -73,23 +73,15 @@ static char *makeBackupName(String, String, unsigned);
 extern void _XawTextShowPosition(TextWidget);
 
 extern Widget scratch, texts[3], labels[3];
-static Boolean double_click = FALSE;
-
-#define DC_UNSAVED	1
-#define DC_LOADED	2
-#define DC_CLOBBER	3
-#define DC_KILL		4
-#define DC_SAVE		5
-#define DC_NEWER	6
+
+#define DC_UNSAVED	(1 << 0)
+#define DC_LOADED	(1 << 1)
+#define DC_CLOBBER	(1 << 2)
+#define DC_KILL		(1 << 3)
+#define DC_SAVE		(1 << 4)
+#define DC_NEWER	(1 << 5)
 static int dc_state;
 
-/*	Function Name: AddDoubleClickCallback(w)
- *	Description: Adds a callback that will reset the double_click flag
- *                   to false when the text is changed.
- *	Arguments: w - widget to set callback upon.
- *                 state - If true add the callback, else remove it.
- *	Returns: none.
- */
 static void
 AddDoubleClickCallback(Widget w, Bool state)
 {
@@ -110,9 +102,7 @@ AddDoubleClickCallback(Widget w, Bool state)
 static void
 ResetDC(Widget w, XtPointer junk, XtPointer garbage)
 {
-  double_click = FALSE;
-
-  AddDoubleClickCallback(w, FALSE);
+    AddDoubleClickCallback(w, FALSE);
 }
 
 /*ARGSUSED*/
@@ -129,14 +119,14 @@ DoQuit(Widget w, XtPointer client_data, XtPointer call_data)
     unsigned i;
     Bool source_changed = False;
 
-    if (!double_click || (dc_state && dc_state != DC_UNSAVED)) {
+    if (!(dc_state & DC_UNSAVED)) {
 	for (i = 0; i < flist.num_itens; i++)
 	    if (flist.itens[i]->flags & CHANGED_BIT) {
 		source_changed = True;
 		break;
 	    }
     }
-    if(!source_changed) {
+    if (!source_changed) {
 #ifndef __UNIXOS2__
 	XeditLispCleanUp();
 #endif
@@ -145,8 +135,7 @@ DoQuit(Widget w, XtPointer client_data, XtPointer call_data)
 
     XeditPrintf("Unsaved changes. Save them, or Quit again.\n");
     Feep();
-    double_click = TRUE;
-    dc_state = DC_UNSAVED;
+    dc_state |= DC_UNSAVED;
     AddDoubleClickCallback(XawTextGetSource(textwindow), True);
 }
 
@@ -240,34 +229,33 @@ DoSave(Widget w, XtPointer client_data, XtPointer call_data)
 
     item = FindTextSource(NULL, filename);
     if (item != NULL && item->source != source) {
-	if (!double_click || (dc_state && dc_state != DC_LOADED)) {
+	if (!(dc_state & DC_LOADED)) {
 	    XmuSnprintf(buffer, sizeof(buffer), "%s%s%s%s",
 			"Save: file ", name, " is already loaded, "
 			"Save again to unload it", nothing_saved);
 	    Feep();
-	    double_click = TRUE;
-	    dc_state = DC_LOADED;
+	    dc_state |= DC_LOADED;
 	    AddDoubleClickCallback(XawTextGetSource(textwindow), True);
 	    goto error;
 	}
-	KillTextSource(item);
-	item = FindTextSource(source = XawTextGetSource(textwindow), NULL);
-	double_click = FALSE;
-	dc_state = 0;
+	else {
+	    KillTextSource(item);
+	    item = FindTextSource(source = XawTextGetSource(textwindow), NULL);
+	    dc_state &= ~DC_LOADED;
+	}
     }
     else if (item && !(item->flags & CHANGED_BIT)) {
-	if (!double_click || (dc_state && dc_state != DC_SAVE)) {
+	if (!(dc_state & DC_SAVE)) {
 	    XmuSnprintf(buffer, sizeof(buffer), "%s%s",
 			"Save: No changes need to be saved, "
 			"save again to override", nothing_saved);
 	    Feep();
-	    double_click = TRUE;
-	    dc_state = DC_SAVE;
+	    dc_state |= DC_SAVE;
 	    AddDoubleClickCallback(XawTextGetSource(textwindow), True);
 	    goto error;
 	}
-	double_click = FALSE;
-	dc_state = 0;
+	else
+	    dc_state &= ~DC_SAVE;
     }
 
     file_access = CheckFilePermissions(filename, &exists);
@@ -287,23 +275,36 @@ DoSave(Widget w, XtPointer client_data, XtPointer call_data)
 
     if (!item || strcmp(item->filename, filename)) {
 	if (file_access == WRITE_OK && exists) {
-	    if (!double_click || (dc_state && dc_state != DC_CLOBBER)) {
+	    if (!(dc_state & DC_CLOBBER)) {
 		XmuSnprintf(buffer, sizeof(buffer), "%s%s%s%s",
 			    "Save: file ", name, " already exists, "
 			    "save again to override", nothing_saved);
 		Feep();
-		double_click = TRUE;
-		dc_state = DC_CLOBBER;
+		dc_state |= DC_CLOBBER;
 		AddDoubleClickCallback(XawTextGetSource(textwindow), True);
 		goto error;
 	    }
-	    double_click = FALSE;
-	    dc_state = 0;
+	    else
+		dc_state &= ~DC_CLOBBER;
 	}
 	if (!item)
 	    item = FindTextSource(source, NULL);
     }
 
+    if (item && item->mtime && exists && item->mtime < st.st_mtime) {
+	if (!(dc_state & DC_NEWER)) {
+	    XmuSnprintf(buffer, sizeof(buffer), "%s%s",
+			"Save: Newer file exists, "
+			"save again to override", nothing_saved);
+	    Feep();
+	    dc_state |= DC_NEWER;
+	    AddDoubleClickCallback(XawTextGetSource(textwindow), True);
+	    goto error;
+	}
+	else
+	    dc_state &= DC_NEWER;
+    }
+
     if (app_resources.enableBackups && exists) {
 	char backup_file[BUFSIZ];
 
@@ -320,21 +321,6 @@ DoSave(Widget w, XtPointer client_data, XtPointer call_data)
 	    Feep();
 	    break;
 	case WRITE_OK:
-	    if (item && item->mtime && exists && item->mtime < st.st_mtime) {
-		if (!double_click || (dc_state && dc_state != DC_NEWER)) {
-		    XmuSnprintf(buffer, sizeof(buffer), "%s%s",
-				"Save: Newer file exists, "
-				"save again to override", nothing_saved);
-		    Feep();
-		    double_click = TRUE;
-		    dc_state = DC_NEWER;
-		    AddDoubleClickCallback(XawTextGetSource(textwindow), True);
-		    goto error;
-		}
-		double_click = FALSE;
-		dc_state = 0;
-	    }
-
 	    if (XawAsciiSaveAsFile(source, filename)) {
 		int i;
 		Arg args[1];
@@ -701,7 +687,6 @@ ResetSourceChanged(xedit_flist_item *item)
     XtSetValues(item->sme, args, num_args);
 
     dc_state = 0;
-    double_click = FALSE;
     for (i = 0; i < 3; i++) {
 	if (XawTextGetSource(texts[i]) == item->source)
 	    XtSetValues(labels[i], args, num_args);
@@ -727,16 +712,14 @@ KillFile(Widget w, XEvent *event, String *params, Cardinal *num_params)
     }
 
     if (item->flags & CHANGED_BIT) {
-	if (!double_click || (dc_state && dc_state != DC_KILL)) {
+	if (!(dc_state & DC_KILL)) {
 	    XeditPrintf("Kill: Unsaved changes. Kill again to override.\n");
 	    Feep();
-	    double_click = TRUE;
-	    dc_state = DC_KILL;
+	    dc_state |= DC_KILL;
 	    AddDoubleClickCallback(XawTextGetSource(textwindow), True);
 	    return;
 	}
-	double_click = FALSE;
-	dc_state = 0;
+	dc_state &= ~DC_KILL;
     }
     KillTextSource(item);
 }