[gnome-shell/gbsneto/icon-grid-dnd: 27/35] allView, folderView: Implement moving icons



commit 0e0ec29e97b7e4905061c0ffd0beaf2566b2db25
Author: Georges Basile Stavracas Neto <georges stavracas gmail com>
Date:   Tue Jul 2 17:42:29 2019 -0300

    allView, folderView: Implement moving icons
    
    This makes use of the new BaseAppIcon.moveItem() API.
    
    WIP: write a proper commit message
    
    https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/603

 js/ui/appDisplay.js | 63 ++++++++++++++++++++++++++++++++++++++++-------------
 1 file changed, 48 insertions(+), 15 deletions(-)
---
diff --git a/js/ui/appDisplay.js b/js/ui/appDisplay.js
index 2a9a3bd18..245982a04 100644
--- a/js/ui/appDisplay.js
+++ b/js/ui/appDisplay.js
@@ -785,38 +785,48 @@ var AllView = class AllView extends BaseAppView {
     }
 
     _onDragEnd() {
+        this.removeNudges();
+
         if (this._dragMonitor) {
             DND.removeDragMonitor(this._dragMonitor);
             this._dragMonitor = null;
         }
     }
 
-    _canDropAt(source) {
-        if (!(source instanceof AppIcon))
-            return false;
+    handleDragOver(source, actor, x, y, time) {
+        let sourceIndex = -1;
+        if (source.parentView == this)
+            sourceIndex = this._allItems.indexOf(source);
 
-        if (!global.settings.is_writable('favorite-apps'))
-            return false;
+        let [index, dragLocation] = this.canDropAt(x, y);
 
-        if (!(source.parentView instanceof FolderView))
-            return false;
+        this.removeNudges();
+        if (source.parentView != this)
+            source.parentView.removeNudges();
 
-        return true;
-    }
+        if (index != -1) {
+            if (sourceIndex == -1 || (index != sourceIndex && index != sourceIndex + 1))
+                this.nudgeItemsAtIndex(index, dragLocation);
 
-    handleDragOver(source, actor, x, y, time) {
-        if (!this._canDropAt(source))
-            return DND.DragMotionResult.NO_DROP;
+            return DND.DragMotionResult.MOVE_DROP;
+        }
 
-        return DND.DragMotionResult.MOVE_DROP;
+        return DND.DragMotionResult.NO_DROP;
     }
 
     acceptDrop(source, actor, x, y, time) {
-        if (!this._canDropAt(source))
+        let [index, dragLocation] = this.canDropAt(x, y);
+
+        if (index == -1)
             return false;
 
-        source.parentView.folderIcon.removeApp(source.app);
+        if (source.parentView != this) {
+            source.parentView.folderIcon.removeApp(source.app);
+            source = this._items[source.id];
+        }
 
+        this.moveItem(source, index);
+        this.removeNudges();
         return true;
     }
 
@@ -1265,6 +1275,29 @@ var FolderView = class FolderView extends BaseAppView {
         this.actor.set_height(this.usedHeight());
     }
 
+    handleDragOver(source, actor, x, y, time) {
+        let [index, dragLocation] = this.canDropAt(x, y);
+        let sourceIndex = this._allItems.indexOf(source);
+
+        this._folderIcon._parentView.removeNudges();
+        this.removeNudges();
+        if (index != -1 && index != sourceIndex && index != sourceIndex + 1)
+            this.nudgeItemsAtIndex(index, dragLocation);
+
+        return DND.DragMotionResult.MOVE_DROP;
+    }
+
+    acceptDrop(source, actor, x, y, time) {
+        let [index, dragLocation] = this.canDropAt(x, y);
+        let success = index != -1;
+
+        if (success)
+            this.moveItem(source, index);
+
+        this.removeNudges();
+        return success;
+    }
+
     _getPageAvailableSize() {
         let pageBox = new Clutter.ActorBox();
         pageBox.x1 = pageBox.y1 = 0;


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