Add mouse feature to print path of node

xdu.c

@@ -38,8 +38,16 @@
  * - 'worksforme' Makefile
  * - -Wall -Werror -Wextra -pedantic
  *
+ * changed mouse actions  Wed Aug 15 2018 11:25:00 PM CEST
+ * Niclas Hofmann, niclas@molgen.mpg.de
+ * - middle mouse button: print path of node that had been clicked
+ * - right mouse button: reset (former middle button action)
+ * - 'worksforme' Makefile
+ * - -Wall -Werror -Wextra -pedantic
+ *
  */
 
+#define _GNU_SOURCE
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -53,6 +61,8 @@
 #define	MAXPATH		4096    /* max total pathname length */
 #define	NCOLS		5       /* default number of columns in display */
 
+char* root_prefix = "[root]";
+
 /* What we IMPORT from xwin.c */
 extern int xsetup(), xmainloop(), xdrawrect(), xrepaint();
 
@@ -215,7 +225,7 @@ int main(argc, argv)
 int argc;
 char **argv;
 {
-    top.name = strdup("[root]");
+    top.name = root_prefix;
     top.size = -1;
 
     xsetup(&argc, argv);
@@ -684,6 +694,27 @@ void press(int x, int y)
     }
 }
 
+void printpath(int x, int y)
+{
+    struct node *np;
+    char* path;
+    char* tmp_path;
+
+    np = findnode(&top, x, y);
+    if (np == NULL)
+        return;
+    asprintf(&path, "%s", np->name);
+    while(np->parent != NULL) {
+        tmp_path = path;
+        asprintf(&path, "%s/%s", np->parent->name, path);
+        np = np->parent;
+        free(tmp_path);
+    }
+    tmp_path = path + strlen(root_prefix);
+    printf("%s\n", tmp_path);
+    free(path);
+}
+
 void reset(void)
 {
     topp = &top;

xwin.c

@@ -37,6 +37,7 @@
 
 /* IMPORTS: routines that this module vectors out to */
 extern int press();
+extern int printpath();
 extern int reset();
 extern int uponechild();
 extern int downonechild();
@@ -123,6 +124,7 @@ static XrmOptionDescRec options[] = {
 
 /* action routines */
 static void a_goto();
+static void a_printpath();
 static void a_reset();
 static void a_quit();
 static void a_reorder();
@@ -138,6 +140,7 @@ static void a_removehelp();
 
 static XtActionsRec actionsTable[] = {
     {"reset", a_reset},
+    {"printpath", a_printpath},
     {"goto", a_goto},
     {"quit", a_quit},
     {"reorder", a_reorder},
@@ -181,7 +184,8 @@ static char defaultTranslations[] = "\
 <Key>9:	ncol(9)\n\
 <Key>0:	ncol(10)\n\
 <Btn1Down>: goto()\n\
-<Btn2Down>: reset()\n\
+<Btn2Down>: printpath()\n\
+<Btn3Down>: reset()\n\
 ";
 
 #define UNUSED1(x) (void)(x)
@@ -220,6 +224,16 @@ Cardinal *num_params;
     press(event->xbutton.x, event->xbutton.y);
 }
 
+static void a_printpath(w, event, params, num_params)
+Widget w;
+XEvent *event;
+String *params;
+Cardinal *num_params;
+{
+    UNUSED(w, params, num_params);
+    printpath(event->xbutton.x, event->xbutton.y);
+}
+
 static void a_reset(w, event, params, num_params)
 Widget w;
 XEvent *event;