Make the window labels visible at all times

When in overview, window labels flicker or are temporarily hidden on a
number of occasions - when simply clicking around the area the windows
are displayed in, dragging a window, sliding in the workspace list,
adding new workspaces etc. This patch makes the label for any window
visible at any given moment when in overview and the said window is
not being dragged around.

https://bugzilla.gnome.org/show_bug.cgi?id=644861

js/ui/workspace.js

@@ -488,6 +488,9 @@ const WindowOverlay = new Lang.Class({
     },
 
     fadeIn: function() {
+        if (!this._hidden)
+            return;
+
         this.show();
         this.title.opacity = 0;
         this._parentActor.raise_top();
@@ -516,7 +519,7 @@ const WindowOverlay = new Lang.Class({
     // get_transformed_position() and get_transformed_size(),
     // as windowClone might be moving.
     // See Workspace._showWindowOverlay
-    updatePositions: function(cloneX, cloneY, cloneWidth, cloneHeight) {
+    updatePositions: function(cloneX, cloneY, cloneWidth, cloneHeight, animate) {
         let button = this.closeButton;
         let title = this.title;
 
@@ -538,15 +541,34 @@ const WindowOverlay = new Lang.Class({
         else
             buttonX = cloneX + (cloneWidth - button._overlap);
 
+        if (animate)
+            this._animateOverlayActor(button, Math.floor(buttonX), Math.floor(buttonY), button.width);
+        else
             button.set_position(Math.floor(buttonX), Math.floor(buttonY));
 
         if (!title.fullWidth)
             title.fullWidth = title.width;
-        title.width = Math.min(title.fullWidth, cloneWidth);
+        let titleWidth = Math.min(title.fullWidth, cloneWidth);
 
-        let titleX = cloneX + (cloneWidth - title.width) / 2;
+        let titleX = cloneX + (cloneWidth - titleWidth) / 2;
         let titleY = cloneY + cloneHeight + title._spacing;
+
+        if (animate)
+            this._animateOverlayActor(title, Math.floor(titleX), Math.floor(titleY), titleWidth);
+        else {
+            title.width = titleWidth;
             title.set_position(Math.floor(titleX), Math.floor(titleY));
+        }
+    },
+
+    _animateOverlayActor: function(actor, x, y, width) {
+        Tweener.addTween(actor,
+                         { x: x,
+                           y: y,
+                           width: width,
+                           time: Overview.ANIMATION_TIME,
+                           transition: 'easeOutQuad'
+                         });
     },
 
     _closeWindow: function(actor) {
@@ -1011,7 +1033,7 @@ const Workspace = new Lang.Class({
 
             let [x, y, scale] = this._computeWindowLayout(metaWindow, slot);
 
-            if (overlay)
+            if (overlay && initialPositioning)
                 overlay.hide();
             if (animate && isOnCurrentWorkspace) {
                 if (!metaWindow.showing_on_its_workspace()) {
@@ -1034,20 +1056,11 @@ const Workspace = new Lang.Class({
                                       });
                 }
 
-                Tweener.addTween(clone.actor,
+                this._animateClone(clone, overlay, x, y, scale, initialPositioning);
-                                 { x: x,
-                                   y: y,
-                                   scale_x: scale,
-                                   scale_y: scale,
-                                   time: Overview.ANIMATION_TIME,
-                                   transition: 'easeOutQuad',
-                                   onComplete: Lang.bind(this, function() {
-                                      this._showWindowOverlay(clone, overlay, true);
-                                   })
-                                 });
             } else {
                 clone.actor.set_position(x, y);
                 clone.actor.set_scale(scale, scale);
+                this._updateWindowOverlayPositions(clone, overlay, x, y, scale, false);
                 this._showWindowOverlay(clone, overlay, isOnCurrentWorkspace);
             }
         }
@@ -1069,23 +1082,35 @@ const Workspace = new Lang.Class({
         }
     },
 
+    _animateClone: function(clone, overlay, x, y, scale, initialPositioning) {
+        Tweener.addTween(clone.actor,
+                                 { x: x,
+                                   y: y,
+                                   scale_x: scale,
+                                   scale_y: scale,
+                                   time: Overview.ANIMATION_TIME,
+                                   transition: 'easeOutQuad',
+                                   onComplete: Lang.bind(this, function() {
+                                         this._showWindowOverlay(clone, overlay, true);
+                                   })
+                                 });
+
+        this._updateWindowOverlayPositions(clone, overlay, x, y, scale, true);
+    },
+
+    _updateWindowOverlayPositions: function(clone, overlay, x, y, scale, animate) {
+        let [cloneWidth, cloneHeight] = clone.actor.get_size();
+        cloneWidth = scale * cloneWidth;
+        cloneHeight = scale * cloneHeight;
+        if (overlay)
+            overlay.updatePositions(x, y, cloneWidth, cloneHeight, animate);
+    },
+
     _showWindowOverlay: function(clone, overlay, fade) {
         if (clone.inDrag)
             return;
 
-        // This is a little messy and complicated because when we
-        // start the fade-in we may not have done the final positioning
-        // of the workspaces. (Tweener doesn't necessarily finish
-        // all animations before calling onComplete callbacks.)
-        // So we need to manually compute where the window will
-        // be after the workspace animation finishes.
-        let [cloneX, cloneY] = clone.actor.get_position();
-        let [cloneWidth, cloneHeight] = clone.actor.get_size();
-        cloneWidth = clone.actor.scale_x * cloneWidth;
-        cloneHeight = clone.actor.scale_y * cloneHeight;
-
         if (overlay) {
-            overlay.updatePositions(cloneX, cloneY, cloneWidth, cloneHeight);
             if (fade)
                 overlay.fadeIn();
             else
@@ -1103,6 +1128,14 @@ const Workspace = new Lang.Class({
         }
     },
 
+    _hideAllOverlays: function() {
+        for (let i = 0; i < this._windows.length; i++) {
+            let overlay = this._windowOverlays[i];
+            if (overlay)
+                overlay.hide();
+        }
+    },
+
     _delayedWindowRepositioning: function() {
         if (this._windowIsZooming)
             return true;
@@ -1124,18 +1157,6 @@ const Workspace = new Lang.Class({
         return false;
     },
 
-    showWindowsOverlays: function() {
-        if (this.leavingOverview)
-            return;
-
-        this._windowOverlaysGroup.show();
-        this._showAllOverlays();
-    },
-
-    hideWindowsOverlays: function() {
-        this._windowOverlaysGroup.hide();
-    },
-
     _doRemoveWindow : function(metaWin) {
         let win = metaWin.get_compositor_private();
 
@@ -1289,7 +1310,7 @@ const Workspace = new Lang.Class({
 
         this.leavingOverview = true;
 
-        this.hideWindowsOverlays();
+        this._hideAllOverlays();
 
         if (this._repositionWindowsId > 0) {
             Mainloop.source_remove(this._repositionWindowsId);

js/ui/workspacesView.js

@@ -267,10 +267,8 @@ const WorkspacesView = new Lang.Class({
         for (let w = 0; w < this._workspaces.length; w++) {
             let workspace = this._workspaces[w];
             if (this._animating || this._scrolling) {
-                workspace.hideWindowsOverlays();
                 workspace.actor.show();
             } else {
-                workspace.showWindowsOverlays();
                 if (this._inDrag)
                     workspace.actor.visible = (Math.abs(w - active) <= 1);
                 else
@@ -456,7 +454,6 @@ const WorkspacesView = new Lang.Class({
         let dy = newY - currentY;
 
         for (let i = 0; i < this._workspaces.length; i++) {
-            this._workspaces[i].hideWindowsOverlays();
             this._workspaces[i].actor.visible = Math.abs(i - adj.value) <= 1;
             this._workspaces[i].actor.y += dy;
         }