[gnome-shell] overviewControls: Simplify dash placement

[Marge Bot <marge-bot src gnome org>]

commit b3c13d612886ad702ef2129600dfbeec67b83282
Author: Florian Müllner <fmuellner gnome org>
Date:   Tue Jan 19 00:57:30 2021 +0100

    overviewControls: Simplify dash placement
    
    Now that the dash is always visible, it doesn't make sense to keep
    it in a separate layer from the main overview group and use a
    separate spacer actor as a placeholder.
    
    Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1575>

 js/ui/overviewControls.js | 51 ++---------------------------------------------
 1 file changed, 2 insertions(+), 49 deletions(-)
---
diff --git a/js/ui/overviewControls.js b/js/ui/overviewControls.js
index 11f50c27c6..a4fee819ae 100644
--- a/js/ui/overviewControls.js
+++ b/js/ui/overviewControls.js
@@ -343,33 +343,14 @@ var DashFader = GObject.registerClass(
 class DashFader extends FaderControl {
     _init(dash) {
         super._init({
-            y_expand: true,
             x_expand: true,
-            y_align: Clutter.ActorAlign.END,
+            x_align: Clutter.ActorAlign.CENTER,
         });
 
         this._dash = dash;
         this.add_child(this._dash);
     }
 
-    vfunc_allocate(box) {
-        this.set_allocation(box);
-
-        box = this.get_theme_node().get_content_box(box);
-
-        const availWidth = Math.round(box.get_width());
-        const availHeight = Math.round(box.get_height());
-        const [, natHeight] = this._dash.get_preferred_height(availWidth);
-
-        const actorBox = new Clutter.ActorBox();
-        actorBox.x1 = box.x1;
-        actorBox.x2 = actorBox.x1 + availWidth;
-        actorBox.y1 = box.y1;
-        actorBox.y2 = actorBox.y1 + (this._dash.y_expand ? availHeight : natHeight);
-
-        this._dash.allocate(box);
-    }
-
     _onWindowDragBegin() {
         this.fadeHalf();
     }
@@ -379,31 +360,6 @@ class DashFader extends FaderControl {
     }
 });
 
-var DashSpacer = GObject.registerClass(
-class DashSpacer extends Clutter.Actor {
-    _init(source) {
-        super._init();
-
-        this._bindConstraint = new Clutter.BindConstraint({
-            source,
-            coordinate: Clutter.BindCoordinate.SIZE,
-        });
-        this.add_constraint(this._bindConstraint);
-    }
-
-    vfunc_get_preferred_width(forHeight) {
-        if (this._bindConstraint)
-            return this._bindConstraint.source.get_preferred_width(forHeight);
-        return super.vfunc_get_preferred_width(forHeight);
-    }
-
-    vfunc_get_preferred_height(forWidth) {
-        if (this._bindConstraint)
-            return this._bindConstraint.source.get_preferred_height(forWidth);
-        return super.vfunc_get_preferred_height(forWidth);
-    }
-});
-
 var ControlsManager = GObject.registerClass(
 class ControlsManager extends St.Widget {
     _init(searchEntry) {
@@ -416,7 +372,6 @@ class ControlsManager extends St.Widget {
 
         this.dash = new Dash.Dash();
         this._dashFader = new DashFader(this.dash);
-        this._dashSpacer = new DashSpacer(this._dashFader);
 
         let workspaceManager = global.workspace_manager;
         let activeWorkspaceIndex = workspaceManager.get_active_workspace_index();
@@ -452,8 +407,6 @@ class ControlsManager extends St.Widget {
         });
         this.add_actor(this._group);
 
-        this.add_actor(this._dashFader);
-
         const box = new St.BoxLayout({
             x_expand: true,
             y_expand: true,
@@ -462,7 +415,7 @@ class ControlsManager extends St.Widget {
         box.add_child(this._thumbnailsSlider);
 
         this._group.add_child(box);
-        this._group.add_actor(this._dashSpacer);
+        this._group.add_actor(this._dashFader);
 
         this.connect('destroy', this._onDestroy.bind(this));
     }