From 2709b070c5fde766c0e9fe98ade169a865e6c9ad Mon Sep 17 00:00:00 2001
From: David Vazgenovich Shakaryan <dvshakaryan@gmail.com>
Date: Tue, 3 May 2022 21:55:21 -0700
Subject: web: oi from c

---
 web/static/dartboat.js | 18 +-----------------
 web/static/style.css   |  4 ++++
 web/web_control.c      |  8 ++++----
 web/web_prompt.c       | 20 +++++++++++++++++++-
 web/web_prompt.h       |  2 ++
 5 files changed, 30 insertions(+), 22 deletions(-)

diff --git a/web/static/dartboat.js b/web/static/dartboat.js
index 4edba8a..eaf76da 100644
--- a/web/static/dartboat.js
+++ b/web/static/dartboat.js
@@ -1,25 +1,9 @@
 const $ = document.querySelector.bind(document);
 const $$ = document.querySelectorAll.bind(document);
 
-let oi_timeout;
-function oi() {
-	$('#oi').style.visibility = 'visible';
-
-	oi_timeout = setTimeout(() => { oi_timeout = null; clearOi(); }, 3000);
-}
-
-function clearOi() {
-	$('#oi').style.visibility = 'hidden';
-
-	if (oi_timeout) {
-		clearTimeout(oi_timeout);
-		oi_timeout = null;
-	}
-}
-
 function scheduleCCall(f, ms, ...args) {
 	const func = UTF8ToString(f);
-	setTimeout(() => Module[`_${func}`](...args), ms);
+	return setTimeout(() => Module[`_${func}`](...args), ms);
 }
 
 function toCString(str) { // caller must free
diff --git a/web/static/style.css b/web/static/style.css
index 43c5b8b..e770c85 100644
--- a/web/static/style.css
+++ b/web/static/style.css
@@ -95,6 +95,10 @@ div#oi {
 	justify-content: center;
 }
 
+div#oi.visible {
+	visibility: visible;
+}
+
 div#info {
 	position: relative;
 
diff --git a/web/web_control.c b/web/web_control.c
index 94e58b7..e1e322d 100644
--- a/web/web_control.c
+++ b/web/web_control.c
@@ -145,7 +145,7 @@ EMSCRIPTEN_KEEPALIVE
 void user_visit(int points)
 {
 	if (!is_points_valid(points, state->active_leg->rem)) {
-		EM_ASM(oi());
+		oi();
 		return;
 	}
 
@@ -175,7 +175,7 @@ EMSCRIPTEN_KEEPALIVE
 void user_undo()
 {
 	if (!state->legs[0]->n_visits) {
-		EM_ASM(oi());
+		oi();
 		return;
 	}
 
@@ -229,7 +229,7 @@ EMSCRIPTEN_KEEPALIVE
 void user_num_darts(int n)
 {
 	if (n < 1 || n > 3) {
-		EM_ASM(oi());
+		oi();
 		return;
 	}
 
@@ -243,7 +243,7 @@ EMSCRIPTEN_KEEPALIVE
 void start_match(int mode)
 {
 	if (mode < M_FIRST || mode > M_LAST) {
-		EM_ASM(oi());
+		oi();
 		return;
 	}
 
diff --git a/web/web_prompt.c b/web/web_prompt.c
index e96e567..814b08e 100644
--- a/web/web_prompt.c
+++ b/web/web_prompt.c
@@ -9,6 +9,8 @@
 
 #include <emscripten/emscripten.h>
 
+int oi_timeout;
+
 struct prompt_state {
 	char *msgl, *input, *msgr;
 };
@@ -17,6 +19,22 @@ struct prompt_state prompt_buffered, prompt_flushed;
 
 enum prompt_mode pm;
 
+void oi()
+{
+	EM_ASM({elemAddClass($0, $1)}, "#oi", "visible");
+	oi_timeout = EM_ASM_INT({return scheduleCCall($0, $1)}, "clear_oi", 3000);
+}
+
+EMSCRIPTEN_KEEPALIVE
+void clear_oi()
+{
+	if (oi_timeout) {
+		EM_ASM({elemRemoveClass($0, $1)}, "#oi", "visible");
+		EM_ASM({clearTimeout($0)}, oi_timeout);
+		oi_timeout = 0;
+	}
+}
+
 static inline void buffer_str(char *str, char **buffer, char *flushed)
 {
 	if (str == *buffer || (str && *buffer && !strcmp(str, *buffer)))
@@ -170,7 +188,7 @@ void prompt_handle_pre(char *command)
 	if (pm == PM_DARTBOARD)
 		return;
 
-	EM_ASM(clearOi());
+	clear_oi();
 
 	if ((pm == PM_VISIT || pm == PM_NUM_DARTS || pm == PM_END_MATCH) &&
 		strcmp(command, "undo"))
diff --git a/web/web_prompt.h b/web/web_prompt.h
index 8758000..7d503f8 100644
--- a/web/web_prompt.h
+++ b/web/web_prompt.h
@@ -11,6 +11,8 @@ enum prompt_mode {
 
 extern enum prompt_mode pm;
 
+void oi();
+
 void prompt_set_msgl(char *str);
 void prompt_set_msgr(char *str);
 void prompt_set_input(char *str);
-- 
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