wm: split geometry trigger into geometry and position

src/config.h

@@ -84,6 +84,8 @@ enum animation_trigger {
 	ANIMATION_TRIGGER_CLOSE,
 	/// When a window's geometry changes
 	ANIMATION_TRIGGER_GEOMETRY,
+	/// When a window's position changes
+	ANIMATION_TRIGGER_POSITION,
 
 	ANIMATION_TRIGGER_INVALID,
 	ANIMATION_TRIGGER_COUNT = ANIMATION_TRIGGER_INVALID,
@@ -97,6 +99,7 @@ static const char *animation_trigger_names[] attr_unused = {
     [ANIMATION_TRIGGER_OPEN] = "open",
     [ANIMATION_TRIGGER_CLOSE] = "close",
     [ANIMATION_TRIGGER_GEOMETRY] = "geometry",
+    [ANIMATION_TRIGGER_POSITION] = "position",
 };
 
 struct script;

src/wm/win.c

@@ -1823,7 +1823,10 @@ bool win_process_animation_and_state_change(struct session *ps, struct win *w, d
 	bool will_never_render =
 	    (!w->ever_damaged || w->win_image == NULL) && w->state != WSTATE_MAPPED;
 	auto win_ctx = win_script_context_prepare(ps, w);
-	bool geometry_changed = !win_geometry_eq(w->previous.g, w->g);
+
+	bool geometry_changed = win_geometry_changed(w->previous.g, w->g);
+	bool position_changed = win_position_changed(w->previous.g, w->g);
+
 	auto old_state = w->previous.state;
 
 	w->previous.state = w->state;
@@ -1834,7 +1837,7 @@ bool win_process_animation_and_state_change(struct session *ps, struct win *w, d
 		// This window won't be rendered, so we don't need to run the animations.
 		bool state_changed = old_state != w->state ||
 		                     win_ctx.opacity_before != win_ctx.opacity ||
-		                     geometry_changed;
+		                     geometry_changed || position_changed;
 		return state_changed || (w->running_animation_instance != NULL);
 	}
 
@@ -1894,6 +1897,9 @@ bool win_process_animation_and_state_change(struct session *ps, struct win *w, d
 			assert(false);
 			return true;
 		}
+	} else if (position_changed) {
+		assert(w->state == WSTATE_MAPPED);
+		trigger = ANIMATION_TRIGGER_POSITION;
 	} else if (geometry_changed) {
 		assert(w->state == WSTATE_MAPPED);
 		trigger = ANIMATION_TRIGGER_GEOMETRY;

src/wm/win.h

@@ -395,10 +395,19 @@ win_options(const struct win *w) {
 	    win_maybe_options_fold(w->options_override, w->options), *w->options_default);
 }
 
-/// Check if win_geometry `a` and `b` have the same sizes and positions. Border width is
+/// Check if the window has changed in size. Border width is
 /// not considered.
-static inline bool win_geometry_eq(struct win_geometry a, struct win_geometry b) {
-	return a.x == b.x && a.y == b.y && a.width == b.width && a.height == b.height;
+static inline bool win_geometry_changed(struct win_geometry a, struct win_geometry b) {
+	return a.width != b.width || a.height != b.height;
+}
+
+/// Check if the window position has changed.
+static inline bool win_position_changed(struct win_geometry a, struct win_geometry b) {
+	if (win_geometry_changed(a, b)) {
+		return false;
+	}
+
+	return a.x != b.x || a.y != b.y;
 }
 
 /// Process pending updates/images flags on a window. Has to be called in X critical