[gnome-shell/gbsneto/custom-icon-positions: 23/23] appDisplay: Append new icons at the first available page after first



commit 21b4eaec17a6c8ed6d3a7ecd58af4c9f7c23d0c1
Author: Georges Basile Stavracas Neto <georges stavracas gmail com>
Date:   Thu Jun 25 17:33:48 2020 -0300

    appDisplay: Append new icons at the first available page after first
    
    As per design discussion, the first page is a somewhat of a special
    page where we really don't want to change anything unless necessary.
    
    Append new icons at the first available slot after the first page.
    Make the placeholder icon be appended to the first available page
    as well, since it's always used when dragging from folder dialogs.
    
    https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1284

 js/ui/appDisplay.js | 27 +++++++++++++++++++++++++--
 1 file changed, 25 insertions(+), 2 deletions(-)
---
diff --git a/js/ui/appDisplay.js b/js/ui/appDisplay.js
index fdbfef6779..4c8678777b 100644
--- a/js/ui/appDisplay.js
+++ b/js/ui/appDisplay.js
@@ -497,10 +497,27 @@ var BaseAppView = GObject.registerClass({
         return true;
     }
 
+    _findBestPageToAppend(startPage = 1) {
+        for (let i = startPage; i < this._grid.nPages; i++) {
+            const pageItems =
+                this._grid.getItemsAtPage(i).filter(c => c.visible);
+
+            if (pageItems.length < this._grid.itemsPerPage)
+                return i;
+        }
+
+        return -1;
+    }
+
     _addItem(item, page, position) {
         let itemIndex = 0;
 
         if (this._grid.nPages > 0) {
+            // Append icons to the first page with empty slot, starting from
+            // the second page
+            if (this._grid.nPages > 1 && page === -1 && position === -1)
+                page = this._findBestPageToAppend();
+
             const realPage = page === -1 ? this._grid.nPages - 1 : page;
 
             itemIndex = position === -1
@@ -1001,8 +1018,14 @@ class AppDisplay extends BaseAppView {
     }
 
     _getItemPosition(item) {
-        if (item === this._placeholder)
-            return this._grid.getItemPosition(item);
+        if (item === this._placeholder) {
+            let [page, position] = this._grid.getItemPosition(item);
+
+            if (page === -1)
+                page = this._findBestPageToAppend(this._grid.currentPage);
+
+            return [page, position];
+        }
 
         return this._pageManager.getAppPosition(item.id);
     }


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