From efc07fb3d45e07529e3817b4a1598f2c3256d600 Mon Sep 17 00:00:00 2001
From: Ryan Dwyer <ryandwyer1@gmail.com>
Date: Sun, 20 May 2018 09:11:55 +1000
Subject: [PATCH] Don't track damage for views on inactive tabs

---
 include/sway/input/seat.h |  6 ++++++
 include/sway/tree/view.h  |  6 ++++++
 sway/desktop/output.c     |  9 ++-------
 sway/input/seat.c         | 12 ++++++++++++
 sway/tree/container.c     |  5 +----
 sway/tree/view.c          | 25 +++++++++++++++++++++++++
 6 files changed, 52 insertions(+), 11 deletions(-)

diff --git a/include/sway/input/seat.h b/include/sway/input/seat.h
index ff76841e..2e4da438 100644
--- a/include/sway/input/seat.h
+++ b/include/sway/input/seat.h
@@ -94,6 +94,12 @@ struct sway_container *seat_get_focus_inactive(struct sway_seat *seat,
 struct sway_container *seat_get_focus_inactive_view(struct sway_seat *seat,
 		struct sway_container *container);
 
+/**
+ * Return the immediate child of container which was most recently focused.
+ */
+struct sway_container *seat_get_active_child(struct sway_seat *seat,
+		struct sway_container *container);
+
 /**
  * Iterate over the focus-inactive children of the container calling the
  * function on each.
diff --git a/include/sway/tree/view.h b/include/sway/tree/view.h
index 951912d0..0fb8f1b3 100644
--- a/include/sway/tree/view.h
+++ b/include/sway/tree/view.h
@@ -274,4 +274,10 @@ bool view_has_mark(struct sway_view *view, char *mark);
 
 void view_update_marks_textures(struct sway_view *view);
 
+/**
+ * Returns true if there's a possibility the view may be rendered on screen.
+ * Intended for damage tracking.
+ */
+bool view_is_visible(struct sway_view *view);
+
 #endif
diff --git a/sway/desktop/output.c b/sway/desktop/output.c
index e39ef8db..6d5777f3 100644
--- a/sway/desktop/output.c
+++ b/sway/desktop/output.c
@@ -754,10 +754,7 @@ static void render_container_tabbed(struct sway_output *output,
 	}
 	struct sway_seat *seat = input_manager_current_seat(input_manager);
 	struct sway_container *focus = seat_get_focus(seat);
-	struct sway_container *current = seat_get_focus_inactive(seat, con);
-	while (current->parent != con) {
-		current = current->parent;
-	}
+	struct sway_container *current = seat_get_active_child(seat, con);
 	struct border_colors *current_colors = NULL;
 
 	// Render tabs
@@ -1082,9 +1079,7 @@ static void output_damage_view(struct sway_output *output,
 		return;
 	}
 
-	struct sway_container *workspace = container_parent(view->swayc,
-			C_WORKSPACE);
-	if (workspace->sway_workspace->fullscreen && !view->is_fullscreen) {
+	if (!view_is_visible(view)) {
 		return;
 	}
 
diff --git a/sway/input/seat.c b/sway/input/seat.c
index 7d541f6e..7a3e928a 100644
--- a/sway/input/seat.c
+++ b/sway/input/seat.c
@@ -718,6 +718,18 @@ struct sway_container *seat_get_focus_inactive(struct sway_seat *seat,
 	return seat_get_focus_by_type(seat, container, C_TYPES);
 }
 
+struct sway_container *seat_get_active_child(struct sway_seat *seat,
+		struct sway_container *container) {
+	struct sway_container *focus = seat_get_focus_inactive(seat, container);
+	if (!focus) {
+		return NULL;
+	}
+	while (focus->parent != container) {
+		focus = focus->parent;
+	}
+	return focus;
+}
+
 struct sway_container *sway_seat_get_focus(struct sway_seat *seat) {
 	if (!seat->has_focus) {
 		return NULL;
diff --git a/sway/tree/container.c b/sway/tree/container.c
index 62dca487..5c1f42c2 100644
--- a/sway/tree/container.c
+++ b/sway/tree/container.c
@@ -522,10 +522,7 @@ static struct sway_container *container_at_tabbed(struct sway_container *parent,
 	}
 
 	// Surfaces
-	struct sway_container *current = seat_get_focus_inactive(seat, parent);
-	while (current->parent != parent) {
-		current = current->parent;
-	}
+	struct sway_container *current = seat_get_active_child(seat, parent);
 
 	return container_at(current, ox, oy, surface, sx, sy);
 }
diff --git a/sway/tree/view.c b/sway/tree/view.c
index 636abb25..51316507 100644
--- a/sway/tree/view.c
+++ b/sway/tree/view.c
@@ -865,3 +865,28 @@ void view_update_marks_textures(struct sway_view *view) {
 			&config->border_colors.urgent);
 	container_damage_whole(view->swayc);
 }
+
+bool view_is_visible(struct sway_view *view) {
+	if (!view->swayc) {
+		return false;
+	}
+	// Check view isn't in a tabbed or stacked container on an inactive tab
+	struct sway_seat *seat = input_manager_current_seat(input_manager);
+	struct sway_container *container = view->swayc;
+	while (container->type != C_WORKSPACE) {
+		if (container->parent->layout == L_TABBED ||
+				container->parent->layout == L_STACKED) {
+			if (seat_get_active_child(seat, container->parent) != container) {
+				return false;
+			}
+		}
+		container = container->parent;
+	}
+	// Check view isn't hidden by another fullscreen view
+	struct sway_container *workspace = container;
+	if (workspace->sway_workspace->fullscreen && !view->is_fullscreen) {
+		return false;
+	}
+	// Check the workspace is visible
+	return workspace_is_visible(workspace);
+}