From bfea10ffcd43cb34fa65ce6b984d9f42abd392d9 Mon Sep 17 00:00:00 2001
From: Evan Paterakis <evan@geopjr.dev>
Date: Sat, 26 Oct 2024 18:49:18 +0300
Subject: [PATCH] fix(Home): floating button scroll gesture capture

---
 src/Views/ContentBase.vala | 14 ++++++++++++--
 src/Views/Home.vala        | 35 ++++++++++++++++++++++++++---------
 2 files changed, 38 insertions(+), 11 deletions(-)

diff --git a/src/Views/ContentBase.vala b/src/Views/ContentBase.vala
index 5768d21d..22c5d205 100644
--- a/src/Views/ContentBase.vala
+++ b/src/Views/ContentBase.vala
@@ -40,6 +40,7 @@ public class Tuba.Views.ContentBase : Views.Base {
 		content_box.child = content;
 
 		scrolled.vadjustment.value_changed.connect (on_scrolled_vadjustment_value_change);
+		scroll_to_top_rev.bind_property ("child-revealed", scroll_to_top_rev, "visible", GLib.BindingFlags.SYNC_CREATE);
 	}
 	~ContentBase () {
 		debug ("Destroying ContentBase");
@@ -55,14 +56,23 @@ public class Tuba.Views.ContentBase : Views.Base {
 		}
 
 		var is_close_to_top = scrolled.vadjustment.value <= 1000;
-		scroll_to_top_rev.reveal_child = !is_close_to_top
-			&& scrolled.vadjustment.value + scrolled.vadjustment.page_size + 100 < scrolled.vadjustment.upper;
+		set_scroll_to_top_reveal_child (
+			!is_close_to_top
+			&& scrolled.vadjustment.value + scrolled.vadjustment.page_size + 100 < scrolled.vadjustment.upper
+		);
 
 		#if !USE_LISTVIEW
 			if (is_close_to_top) reached_close_to_top ();
 		#endif
 	}
 
+	protected void set_scroll_to_top_reveal_child (bool reveal) {
+		if (reveal == scroll_to_top_rev.reveal_child) return;
+		if (reveal) scroll_to_top_rev.visible = true;
+
+		scroll_to_top_rev.reveal_child = reveal;
+	}
+
 	#if USE_LISTVIEW
 		protected virtual void bind_listitem_cb (GLib.Object item) {
 			((Gtk.ListItem) item).child = on_create_model_widget (((Gtk.ListItem) item).item);
diff --git a/src/Views/Home.vala b/src/Views/Home.vala
index 8ebbf90a..ef97508b 100644
--- a/src/Views/Home.vala
+++ b/src/Views/Home.vala
@@ -1,5 +1,6 @@
 public class Tuba.Views.Home : Views.Timeline {
 	Gtk.Revealer compose_button_rev;
+	Gtk.Button compose_button;
 	construct {
 		url = "/api/v1/timelines/home";
 		label = _("Home");
@@ -11,21 +12,23 @@ public class Tuba.Views.Home : Views.Timeline {
 		scroll_to_top_rev.margin_bottom = 24;
 		scroll_to_top_rev.add_css_class ("scroll-to-top-btn");
 
+		compose_button = new Gtk.Button.from_icon_name ("document-edit-symbolic") {
+			action_name = "app.compose",
+			tooltip_text = _("Compose"),
+			css_classes = { "circular", "compose-button", "suggested-action" }
+		};
 		compose_button_rev = new Gtk.Revealer () {
 			transition_type = Gtk.RevealerTransitionType.SLIDE_UP,
 			valign = halign = Gtk.Align.END,
 			margin_end = 24,
+			margin_bottom = 24,
 			reveal_child = true,
 			overflow = Gtk.Overflow.VISIBLE,
-			child = new Gtk.Button.from_icon_name ("document-edit-symbolic") {
-				action_name = "app.compose",
-				tooltip_text = _("Compose"),
-				css_classes = { "circular", "compose-button", "suggested-action" },
-				margin_bottom = 24
-			}
+			child = compose_button
 		};
 
 		compose_button_rev.notify["reveal-child"].connect (toggle_scroll_to_top_margin);
+		compose_button_rev.notify["child-revealed"].connect (on_child_revealed);
 		toggle_scroll_to_top_margin ();
 
 		scrolled_overlay.add_overlay (compose_button_rev);
@@ -42,7 +45,7 @@ public class Tuba.Views.Home : Views.Timeline {
 
 		app.notify["is-mobile"].connect (() => {
 			if (!app.is_mobile)
-					compose_button_rev.reveal_child = true;
+				set_compose_button_reveal_child (true);
 		});
 
 		this.bind_property ("entity-queue-size", this, "badge-number", BindingFlags.SYNC_CREATE);
@@ -57,6 +60,20 @@ public class Tuba.Views.Home : Views.Timeline {
 		Tuba.toggle_css (scroll_to_top_rev, compose_button_rev.reveal_child, "composer-btn-revealed");
 	}
 
+	void set_compose_button_reveal_child (bool reveal) {
+		if (compose_button_rev.reveal_child == reveal) return;
+
+		compose_button.margin_bottom = 24;
+		compose_button_rev.margin_bottom = 0;
+
+		compose_button_rev.reveal_child = reveal;
+	}
+
+	void on_child_revealed () {
+		compose_button.margin_bottom = 0;
+		compose_button_rev.margin_bottom = 24;
+	}
+
 	double last_adjustment = 0;
 	double show_on_adjustment = -1;
 	bool last_direction_down = false;
@@ -76,9 +93,9 @@ public class Tuba.Views.Home : Views.Timeline {
 		}
 
 		if (compose_button_rev.reveal_child && direction_down)
-			compose_button_rev.reveal_child = false;
+			set_compose_button_reveal_child (false);
 		else if (!compose_button_rev.reveal_child && !direction_down && trunced <= show_on_adjustment)
-			compose_button_rev.reveal_child = true;
+			set_compose_button_reveal_child (true);
 
 		last_adjustment = trunced;
 	}