[gnome-shell/gbsneto/icon-grid-dnd: 35/35] folderIcon: Open popup when dragging over

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

commit 82061aeb0ee69529a549639e822a97fe6685415f
Author: Georges Basile Stavracas Neto <georges stavracas gmail com>
Date:   Thu Jul 4 16:55:44 2019 -0300

    folderIcon: Open popup when dragging over
    
    WIP: commit message
    
    https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/603

 js/ui/appDisplay.js | 33 +++++++++++++++++++++++++++++++--
 1 file changed, 31 insertions(+), 2 deletions(-)
---
diff --git a/js/ui/appDisplay.js b/js/ui/appDisplay.js
index ac8661908..c061f549b 100644
--- a/js/ui/appDisplay.js
+++ b/js/ui/appDisplay.js
@@ -1468,6 +1468,8 @@ var FolderIcon = class FolderIcon {
 
         this._folder.connect('changed', this._redisplay.bind(this));
         this._redisplay();
+
+        this._openPopupTimeoutId = 0;
     }
 
     getAppIds() {
@@ -1484,6 +1486,27 @@ var FolderIcon = class FolderIcon {
         return false;
     }
 
+    _scheduleOpenPopup() {
+        if (this._openPopupTimeoutId > 0)
+            return;
+
+        this._openPopupTimeoutId = GLib.timeout_add(GLib.PRIORITY_DEFAULT, 1000, () => {
+            this._ensurePopup();
+            this.view.actor.vscroll.adjustment.value = 0;
+            this._openSpaceForPopup();
+
+            this._openPopupTimeoutId = 0;
+            return GLib.SOURCE_REMOVE;
+        });
+    }
+
+    _unscheduleOpenPopup() {
+        if (this._openPopupTimeoutId > 0) {
+            GLib.source_remove(this._openPopupTimeoutId);
+            this._openPopupTimeoutId = 0;
+        }
+    }
+
     _onDragBegin() {
         this._dragMonitor = {
             dragMotion: this._onDragMotion.bind(this),
@@ -1496,10 +1519,12 @@ var FolderIcon = class FolderIcon {
     _onDragMotion(dragEvent) {
         let target = dragEvent.targetActor;
 
-        if (!this._isChild(target) || !this._canDropAt(dragEvent.source))
+        if (!this._isChild(target) || !this._canDropAt(dragEvent.source)) {
             this.actor.remove_style_pseudo_class('drop');
-        else
+            this._unscheduleOpenPopup();
+        } else {
             this.actor.add_style_pseudo_class('drop');
+        }
 
         return DND.DragMotionResult.CONTINUE;
     }
@@ -1524,6 +1549,8 @@ var FolderIcon = class FolderIcon {
     }
 
     handleDragOver(source, actor, x, y, time) {
+        this._scheduleOpenPopup();
+
         if (!this._canDropAt(source))
             return DND.DragMotionResult.NO_DROP;
 
@@ -1531,6 +1558,8 @@ var FolderIcon = class FolderIcon {
     }
 
     acceptDrop(source, actor, x, y, time) {
+        this._unscheduleOpenPopup();
+
         if (!this._canDropAt(source))
             return true;