From ec625266c8f2b2c06355f31b5d58ec030bbc8e5d Mon Sep 17 00:00:00 2001
From: "Avi Halachmi (:avih)" <avihpit@yahoo.com>
Date: Tue, 27 Mar 2018 15:29:57 +0300
Subject: js: use new hooks API (match f60826c3)

---
 player/javascript.c           | 42 ++++++++++++++++++++++++++++++++++++++++++
 player/javascript/defaults.js | 18 ++++++++----------
 2 files changed, 50 insertions(+), 10 deletions(-)

diff --git a/player/javascript.c b/player/javascript.c
index 9afc5f10da..9ffc9de4c8 100644
--- a/player/javascript.c
+++ b/player/javascript.c
@@ -503,6 +503,8 @@ error_out:
  *********************************************************************/
 static void pushnode(js_State *J, mpv_node *node);
 static void makenode(void *ta_ctx, mpv_node *dst, js_State *J, int idx);
+static int jsL_checkint(js_State *J, int idx);
+static int64_t jsL_checkint64(js_State *J, int idx);
 
 // Return the index in opts of stack[idx] (or of def if undefined), else throws.
 static int checkopt(js_State *J, int idx, const char *def, const char *opts[],
@@ -792,6 +794,21 @@ static void script_get_wakeup_pipe(js_State *J)
     js_pushnumber(J, mpv_get_wakeup_pipe(jclient(J)));
 }
 
+// args: name (str), priority (int), id (uint)
+static void script__hook_add(js_State *J)
+{
+    const char *name = js_tostring(J, 1);
+    int pri = jsL_checkint(J, 2);
+    uint64_t id = jsL_checkint64(J, 3);
+    push_status(J, mpv_hook_add(jclient(J), id, name, pri));
+}
+
+// args: id (uint)
+static void script__hook_continue(js_State *J)
+{
+    push_status(J, mpv_hook_continue(jclient(J), jsL_checkint64(J, 1)));
+}
+
 /**********************************************************************
  *  mp.utils
  *********************************************************************/
@@ -1103,6 +1120,22 @@ static bool same_as_int64(double d)
     return d >= INT64_MIN && d <= INT64_MAX && d == (int64_t)d;
 }
 
+static int jsL_checkint(js_State *J, int idx)
+{
+    double d = js_tonumber(J, idx);
+    if (!(d >= INT_MIN && d <= INT_MAX))
+        js_error(J, "integer out of range at index %d", idx);
+    return d;
+}
+
+static int64_t jsL_checkint64(js_State *J, int idx)
+{
+    double d = js_tonumber(J, idx);
+    if (!(d >= INT64_MIN && d <= INT64_MAX))
+        js_error(J, "integer out of range at index %d", idx);
+    return d;
+}
+
 // From the js stack value/array/object at index idx
 static void makenode(void *ta_ctx, mpv_node *dst, js_State *J, int idx)
 {
@@ -1243,6 +1276,13 @@ static void script_wait_event(js_State *J)
         js_setproperty(J, -2, "data");  // reply.data (value as observed type)
         break;
     }
+
+    case MPV_EVENT_HOOK: {
+        mpv_event_hook *hook = event->data;
+        js_pushnumber(J, hook->id);
+        js_setproperty(J, -2, "hook_id");  // reply.hook_id (is a number)
+        break;
+    }
     }  // switch (event->event_id)
 
     assert(top == js_gettop(J) - 1);
@@ -1285,6 +1325,8 @@ static const struct fn_entry main_fns[] = {
     AF_ENTRY(format_time, 2),
     FN_ENTRY(enable_messages, 1),
     FN_ENTRY(get_wakeup_pipe, 0),
+    FN_ENTRY(_hook_add, 3),
+    FN_ENTRY(_hook_continue, 1),
     FN_ENTRY(set_osd_ass, 3),
     FN_ENTRY(get_osd_size, 0),
     FN_ENTRY(get_osd_margins, 0),
diff --git a/player/javascript/defaults.js b/player/javascript/defaults.js
index 96bac2126f..6e5686ff3d 100644
--- a/player/javascript/defaults.js
+++ b/player/javascript/defaults.js
@@ -123,22 +123,19 @@ function dispatch_message(ev) {
 }
 
 //  ----- hooks -----
-var next_hid = 1,
-    hooks = new_cache();  // items of id: fn
+var hooks = [];  // array of callbacks, id is index+1
 
-function hook_run(id, cont) {
-    var cb = hooks[id];
+function run_hook(ev) {
+    var cb = ev.id > 0 && hooks[ev.id - 1];
     if (cb)
         cb();
-    mp.commandv("hook-ack", cont);
+    mp._hook_continue(ev.hook_id);
 }
 
 mp.add_hook = function add_hook(name, pri, fn) {
-    if (next_hid == 1)  // doesn't really matter if we do it once or always
-        mp.register_script_message("hook_run", hook_run);
-    var id = next_hid++;
-    hooks[id] = fn;
-    return mp.commandv("hook-add", name, id, pri);
+    hooks.push(fn);
+    // 50 (scripting docs default priority) maps to 0 (default in C API docs)
+    return mp._hook_add(name, pri - 50, hooks.length);
 }
 
 /**********************************************************************
@@ -559,6 +556,7 @@ mp.keep_running = true;
 g.exit = function() { mp.keep_running = false };  // user-facing too
 mp.register_event("shutdown", g.exit);
 mp.register_event("property-change", notify_observer);
+mp.register_event("hook", run_hook);
 mp.register_event("client-message", dispatch_message);
 mp.register_script_message("key-binding", dispatch_key_binding);
 
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