From: Rui Guo <firemeteor.guo@gmail.com>
Date: Wed, 3 Jun 2009 04:01:06 +0000 (+0800)
Subject: Introduce the event register & dispatching framework. (not finished)
X-Git-Url: https://repo.or.cz/w/screen-lua.git/commitdiff_plain/e67ddbc4540b63f143151e8ea76c949b9dfd122a

Introduce the event register & dispatching framework. (not finished)

1. Define the script_event structure, lookup table etc.
2. Implement the event lookup logic.
3. Some sample events defined.
---

diff --git a/src/script.c b/src/script.c
index 4293be4..98d1cbb 100644
--- a/src/script.c
+++ b/src/script.c
@@ -21,6 +21,9 @@
 
 #include "config.h"
 #include "screen.h"
+#include <stddef.h>
+
+/*Binding structure & functions*/
 
 struct binding *bindings = NULL;
 
@@ -100,6 +103,55 @@ ScriptSource(int argc, const char **argv)
     LMsg(1, "Could not source specified script %s", script);
 }
 
+/* Event notification handling */
+
+struct gevents {
+    struct script_event cmdexecuted;
+} globalevents;
+
+/* To add new event, introduce a filed for that event to the object in
+ * question, don't forget to put a name, offset pair here.  NOTE: keep the
+ * name field sorted in alphabet order, the searching relies on it.
+ */
+
+struct {
+    char *name;
+    int offset;
+} event_table[] = {
+      {"global_cmdexecuted", offsetof(struct gevents, cmdexecuted)},
+      {"window_resize", offsetof(struct win, resize)},
+      {"window_can_resize", offsetof(struct win, canresize)}
+};
+
+struct script_event *
+get_object_event_queue(char *name, char *obj) {
+    int lo, hi, n, cmp;
+    if (!obj)
+      obj = (char *)&globalevents;
+
+    lo = 0;
+    n = hi = sizeof(event_table);
+    while (lo < hi) {
+        int half;
+        half = (lo + hi) >> 1;
+        cmp = strcmp(name, event_table[half].name);
+        if (cmp > 0)
+          lo = half + 1;
+        else
+          hi = half;
+    }
+
+    if (lo >= n || strcmp(name, event_table[lo].name))
+      return 0;
+    else
+      return (struct event *)(obj + event_table[lo].offset);
+}
+
+void
+register_listener(struct script_event * event, struct listener *listener)
+{
+}
+
 #define ALL_SCRIPTS(fn, params, stop) do { \
   struct binding *iter; \
   for (iter = bindings; iter; iter = iter->b_next) \
diff --git a/src/script.h b/src/script.h
index 67b151a..9234509 100644
--- a/src/script.h
+++ b/src/script.h
@@ -48,5 +48,13 @@ struct binding
 void LoadBindings(void);
 void FinializeBindings(void);
 
+struct listener {
+
+};
+
+struct script_event {
+    int blockable;
+    struct listener *listeners;
+};
 
 #endif
diff --git a/src/window.h b/src/window.h
index 6c6ca76..f9840c5 100644
--- a/src/window.h
+++ b/src/window.h
@@ -280,6 +280,10 @@ struct win
   struct mline *w_alt_hlines;
   int    w_alt_histidx;
 #endif
+#ifdef SCRIPT
+  struct script_event resize;
+  struct script_event canresize;
+#endif
 };