[gnome-shell/gbsneto/pagination: 42/53] appDisplay: Move child focus handling to IconGrid

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

commit 4be1c62990d7976e9a3dd4f1b98ce8e12dceee42
Author: Georges Basile Stavracas Neto <georges stavracas gmail com>
Date:   Tue May 19 15:34:11 2020 -0300

    appDisplay: Move child focus handling to IconGrid
    
    The icon grid is always paginated, so the app grid code doesn't need
    to behave differently in the FolderView and AppDisplay.
    
    Move the keyboard handling to IconGrid itself, and remove the now dead
    code from AppDisplay.
    
    https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1271

 js/ui/appDisplay.js | 16 ----------------
 js/ui/iconGrid.js   | 13 +++++++++++--
 2 files changed, 11 insertions(+), 18 deletions(-)
---
diff --git a/js/ui/appDisplay.js b/js/ui/appDisplay.js
index e3398baaaa..b38560e00a 100644
--- a/js/ui/appDisplay.js
+++ b/js/ui/appDisplay.js
@@ -124,9 +124,6 @@ var BaseAppView = GObject.registerClass({
         super._init(params);
 
         this._grid = new IconGrid.IconGrid();
-        this._grid.connect('child-focused', (grid, actor) => {
-            this._childFocused(actor);
-        });
         // Standard hack for ClutterBinLayout
         this._grid.x_expand = true;
 
@@ -144,10 +141,6 @@ var BaseAppView = GObject.registerClass({
         });
     }
 
-    _childFocused(_actor) {
-        // Nothing by default
-    }
-
     _redisplay() {
         let oldApps = this._orderedItems.slice();
         let oldAppIds = oldApps.map(icon => icon.id);
@@ -732,11 +725,6 @@ class AppDisplay extends BaseAppView {
         });
     }
 
-    _childFocused(icon) {
-        let itemPage = this._grid.getItemPage(icon);
-        this.goToPage(itemPage);
-    }
-
     _updateIconOpacities(folderOpen) {
         for (let icon of this._items.values()) {
             let opacity;
@@ -1064,10 +1052,6 @@ class FolderView extends BaseAppView {
         this._redisplay();
     }
 
-    _childFocused(actor) {
-        Util.ensureActorVisibleInScrollView(this._scrollView, actor);
-    }
-
     // Overridden from BaseAppView
     animate(animationDirection) {
         this._grid.animatePulse(animationDirection);
diff --git a/js/ui/iconGrid.js b/js/ui/iconGrid.js
index 8ee4d9643b..6d3c139d14 100644
--- a/js/ui/iconGrid.js
+++ b/js/ui/iconGrid.js
@@ -1107,7 +1107,6 @@ var IconGrid = GObject.registerClass({
     Signals: {
         'pages-changed': {},
         'animation-done': {},
-        'child-focused': { param_types: [Clutter.Actor.$gtype] },
     },
 }, class IconGrid extends St.Viewport {
     _init(layoutParams = {}) {
@@ -1162,7 +1161,9 @@ var IconGrid = GObject.registerClass({
     }
 
     _childAdded(grid, child) {
-        child._iconGridKeyFocusInId = child.connect('key-focus-in', actor => this.emit('child-focused', 
actor));
+        child._iconGridKeyFocusInId = child.connect('key-focus-in', () => {
+            this._ensureItemIsVisible(child);
+        });
 
         child._paintVisible = child.opacity > 0;
         child._opacityChangedId = child.connect('notify::opacity', () => {
@@ -1173,6 +1174,14 @@ var IconGrid = GObject.registerClass({
         });
     }
 
+    _ensureItemIsVisible(item) {
+        if (!this.contains(item))
+            throw new Error(`${item} is not a child of IconGrid`);
+
+        const itemPage = this.layout_manager.getItemPage(item);
+        this.goToPage(itemPage);
+    }
+
     _setGridMode(modeIndex) {
         if (this._currentMode === modeIndex)
             return;