new property argument to widget _tell functions

actually the _tell function won't handle the new argument.
Coming patches will handle them.

it will need now something like this:

echo '0 widget_tell widget property value'

where property can be anything used in the awesomerc file,
that means what will be supported. Like: fg, fg_end, width, font...

(actually it ignores the property value and changes what have been changed in
the past as well.)

structs.h

@@ -101,7 +101,7 @@ struct Widget
     /** Draw function */
     int (*draw)(Widget *, DrawCtx *, int, int);
     /** Update function */
-    void (*tell)(Widget *, char *);
+    void (*tell)(Widget *, char *, char *);
     /** ButtonPressedEvent handler */
     void (*button_press)(Widget *, XButtonPressedEvent *);
     /** Statusbar */

widget.c

@@ -130,7 +130,8 @@ widget_common_button_press(Widget *widget, XButtonPressedEvent *ev)
  * \param command unused argument
  */
 static void
-widget_common_tell(Widget *widget, char *command __attribute__ ((unused)))
+widget_common_tell(Widget *widget, char *property __attribute__ ((unused)),
+                   char *command __attribute__ ((unused)))
 {
     warn("%s widget does not accept commands.\n", widget->name);
 }
@@ -182,7 +183,7 @@ void
 uicb_widget_tell(int screen, char *arg)
 {
     Widget *widget;
-    char *p, *command;
+    char *p, *property = NULL, *command;
     ssize_t len;
 
     if (!arg)
@@ -206,17 +207,26 @@ uicb_widget_tell(int screen, char *arg)
         return;
     }
 
+    p = strtok(NULL, " ");
+    if(!p)
+    {
+        warn("Ignoring malformed widget command.\n");
+        return;
+    }
+
+    property = p;
+
     if(p + a_strlen(p) < arg + len)
     {
         p = p + a_strlen(p) + 1;
         len = a_strlen(p);
         command = p_new(char, len + 1);
         a_strncpy(command, len + 1, p, len);
-        widget->tell(widget, command);
+        widget->tell(widget, property, command);
         p_delete(&command);
     }
     else
-        widget->tell(widget, NULL);
+        widget->tell(widget, property, NULL);
 
     widget->cache.needs_update = True;
 

widgets/graph.c

@@ -170,14 +170,14 @@ graph_draw(Widget *widget, DrawCtx *ctx, int offset,
 }
 
 static void
-graph_tell(Widget *widget, char *command)
+graph_tell(Widget *widget, char *property, char *command)
 {
     Data *d = widget->data;
     int i, z;
     float *value;
     char *tok;
 
-    if(!command || d->width < 1 || !(d->data_items > 0))
+    if(!property || !command || d->width < 1 || !(d->data_items > 0))
         return;
 
     value = p_new(float, d->data_items);

widgets/iconbox.c

@@ -64,10 +64,13 @@ iconbox_draw(Widget *widget, DrawCtx *ctx, int offset,
 }
 
 static void
-iconbox_tell(Widget *widget, char *command)
+iconbox_tell(Widget *widget, char *property, char *command)
 {
     Data *d = widget->data;
 
+    if(!property || !command)
+        return;
+
     if(d->image)
         p_delete(&d->image);
     d->image = a_strdup(command);

widgets/progressbar.c

@@ -118,13 +118,13 @@ progressbar_draw(Widget *widget, DrawCtx *ctx, int offset,
 }
 
 static void
-progressbar_tell(Widget *widget, char *command)
+progressbar_tell(Widget *widget, char *property, char *command)
 {
     Data *d = widget->data;
     int i = 0, percent;
     char * tok;
 
-    if(!command || !d->bars)
+    if(!property || !command || !d->bars)
         return;
 
     for (tok = strtok(command, ","); tok && i < d->bars; tok = strtok(NULL, ","), i++)

widgets/textbox.c

@@ -65,12 +65,15 @@ textbox_draw(Widget *widget, DrawCtx *ctx, int offset, int used)
 }
 
 static void
-textbox_tell(Widget *widget, char *command)
+textbox_tell(Widget *widget, char *property, char *command)
 {
     char *ntok, *tok;
     ssize_t command_len = a_strlen(command);
     int i = 0, phys_screen = get_phys_screen(widget->statusbar->screen);
 
+    if(!property || !command)
+        return;
+
     Data *d = widget->data;
     if (d->text)
         p_delete(&d->text);