From e1d31c94710bf76af6e0c4995ca1240287d01b8e Mon Sep 17 00:00:00 2001
From: Patrick McDermott <pj@pehjota.net>
Date: Sat, 30 Sep 2017 14:43:36 -0400
Subject: MqTabChrome: Set back/forward button sensitivity on list change

The back/forward list apparently often changes after the URI changes,
e.g. when navigating between page fragments.
---
(limited to 'src/tab-chrome.c')

diff --git a/src/tab-chrome.c b/src/tab-chrome.c
index 548cd78..e368694 100644
--- a/src/tab-chrome.c
+++ b/src/tab-chrome.c
@@ -563,11 +563,6 @@ load_changed_cb(WebKitWebView *web_view, WebKitLoadEvent load_event,
 				GTK_ENTRY(chrome->uri_entry), 0.0);
 			break;
 	}
-
-	gtk_widget_set_sensitive(GTK_WIDGET(chrome->back_button),
-		webkit_web_view_can_go_back(web_view));
-	gtk_widget_set_sensitive(GTK_WIDGET(chrome->forward_button),
-		webkit_web_view_can_go_forward(web_view));
 }
 
 static gboolean
@@ -671,11 +666,6 @@ uri_cb(WebKitWebView *web_view, GParamSpec __attribute__((unused)) *paramspec,
 	gtk_entry_set_text(GTK_ENTRY(chrome->uri_entry), uri);
 	g_free(uri);
 	gtk_entry_set_attributes(GTK_ENTRY(chrome->uri_entry), NULL);
-
-	gtk_widget_set_sensitive(GTK_WIDGET(chrome->back_button),
-		webkit_web_view_can_go_back(web_view));
-	gtk_widget_set_sensitive(GTK_WIDGET(chrome->forward_button),
-		webkit_web_view_can_go_forward(web_view));
 }
 
 static void
@@ -705,6 +695,18 @@ loading_cb(WebKitWebView *web_view,
 }
 
 static void
+back_forward_list_changed_cb(
+	WebKitBackForwardList __attribute__((unused)) *back_forward_list,
+	WebKitBackForwardListItem __attribute__((unused)) *item_added,
+	gpointer __attribute__((unused)) items_removed, MqTabChrome *chrome)
+{
+	gtk_widget_set_sensitive(GTK_WIDGET(chrome->back_button),
+		webkit_web_view_can_go_back(chrome->web_view));
+	gtk_widget_set_sensitive(GTK_WIDGET(chrome->forward_button),
+		webkit_web_view_can_go_forward(chrome->web_view));
+}
+
+static void
 connect_web_view(MqTabChrome *chrome)
 {
 	chrome->hovered_link_uri = NULL;
@@ -721,6 +723,9 @@ connect_web_view(MqTabChrome *chrome)
 		G_CALLBACK(uri_cb), chrome);
 	g_signal_connect(chrome->web_view, "notify::is-loading",
 		G_CALLBACK(loading_cb), chrome);
+	g_signal_connect(
+		webkit_web_view_get_back_forward_list(chrome->web_view),
+		"changed", G_CALLBACK(back_forward_list_changed_cb), chrome);
 }
 
 void
--
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