an object to get what is currently in the canvas-local path

svn path=/trunk/externals/hcs/; revision=11006

1 files changed, 97 insertions, 0 deletions

diff --git a/ce_path.c b/ce_path.c
new file mode 100644
index 0000000..7d04b0d
--- /dev/null
+++ b/ce_path.c
@@ -0,0 +1,97 @@
+/*
+ * This object allows you to see what is currently in the canvas-local path.
+ */
+
+#include "m_pd.h"
+#include "s_stuff.h"
+#include "g_canvas.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+/* WARNING: KLUDGE!  */
+/*
+ * this struct is not publically defined (its in g_canvas.c) so I need to
+ * include this here.  Its from Pd 0.41-test03 2006-11-19. */
+struct _canvasenvironment
+{
+    t_symbol *ce_dir;      /* directory patch lives in */
+    int ce_argc;           /* number of "$" arguments */
+    t_atom *ce_argv;       /* array of "$" arguments */
+    int ce_dollarzero;     /* value of "$0" */
+    t_namelist *ce_path;   /* search path */
+};
+
+//static char *version = "$Revision: 1.2 $";
+
+#define DEBUG(x)
+//#define DEBUG(x) x 
+
+/*------------------------------------------------------------------------------
+ *  CLASS DEF
+ */
+t_class *ce_path_class;
+
+typedef struct _ce_path
+{
+    t_object            x_obj;
+    t_canvasenvironment *x_canvasenvironment;
+    t_namelist          *x_current;
+    t_outlet            *x_data_outlet;
+    t_outlet            *x_status_outlet;
+} t_ce_path;
+
+static void ce_path_output(t_ce_path* x)
+{
+    DEBUG(post("ce_path_output"););
+    char buffer[FILENAME_MAX];
+
+/* TODO: think about using x->x_current->nl_next so that if [ce_path] is at
+ * the end of its list, and another element gets added to the local
+ * namespace, [ce_path] will output the new element on the next bang. */
+    if(x->x_current)
+    {
+        strncpy(buffer, x->x_current->nl_string, FILENAME_MAX);
+        outlet_symbol( x->x_data_outlet, gensym(buffer));
+        x->x_current = x->x_current->nl_next;
+    }
+    else 
+        outlet_bang(x->x_status_outlet);
+}
+
+
+static void ce_path_rewind(t_ce_path* x) 
+{
+    x->x_current = x->x_canvasenvironment->ce_path;
+}
+
+
+static void *ce_path_new(void)
+{
+    t_ce_path *x = (t_ce_path *)pd_new(ce_path_class);
+
+    x->x_data_outlet = outlet_new(&x->x_obj, &s_symbol);
+    x->x_status_outlet = outlet_new(&x->x_obj, 0);
+
+    x->x_canvasenvironment = canvas_getenv(canvas_getcurrent());
+    ce_path_rewind(x);
+    
+    return (x);
+}
+
+void ce_path_setup(void)
+{
+    ce_path_class = class_new(gensym("ce_path"), (t_newmethod)ce_path_new,
+                             NULL,
+                             sizeof(t_ce_path), 
+                             CLASS_DEFAULT, 
+                             0, 
+                             0);
+    /* add inlet atom methods */
+    class_addbang(ce_path_class, (t_method) ce_path_output);
+    
+    /* add inlet selector methods */
+    class_addmethod(ce_path_class, (t_method) ce_path_rewind,
+                    gensym("rewind"), 0);
+}