Fixes an edge case in the diff

CHANGELOG

@@ -38,7 +38,7 @@ Motions:
 - Bugfix: Several bugfixes regarding splitting list items in
   change recommendations [#3288].
 - Bugfix: Several bugfixes regarding diff version [#3407, #3408, #3410,
-  #3440, #3450, #3465].
+  #3440, #3450, #3465, #3537, #3546].
 - Added inline Editing for motion reason [#3361].
 - Added multiselect filter for motion comments [#3372].
 - Added support for pinning personal notes to the window [#3360].

openslides/motions/static/js/motions/diff.js

@@ -960,6 +960,19 @@ angular.module('OpenSlidesApp.motions.diff', ['OpenSlidesApp.motions.lineNumberi
             newStr = this._normalizeHtmlForDiff(newStr.replace(/\s+$/, '').replace(/^\s+/, ''));
 
             var out = this._diff(this._tokenizeHtml(oldStr), this._tokenizeHtml(newStr));
+
+            // This fixes the problem tested by "does not lose words when changes are moved X-wise"
+            var lastRow = 0;
+            for (var z = 0; z < out.n.length; z++) {
+                if (out.n[z].row && out.n[z].row > lastRow) {
+                    lastRow = out.n[z].row;
+                }
+                if (out.n[z].row && out.n[z].row < lastRow) {
+                    out.o[out.n[z].row] = out.o[out.n[z].row].text;
+                    out.n[z] = out.n[z].text;
+                }
+            }
+
             var str = "";
             var i;
 

tests/karma/motions/diff.service.test.js

@@ -598,6 +598,14 @@ describe('linenumbering', function () {
 
       expect(diff).toBe('<p class="os-split-after os-split-before"><span class="line-number-4 os-line-number" contenteditable="false" data-line-number="4">&nbsp;</span><span class="os-split-after os-split-before" style="color: #0000ff;">sanctus est Lorem ipsum dolor sit amet. <ins>Test </ins>Lorem ipsum dolor sit amet, consetetur sadipscing </span></p>');
     });
+
+    it('does not lose words when changes are moved X-wise', function () {
+      var before = 'elitr. einsetzt. VERSCHLUCKT noch die sog. Gleichbleibend (Wird gelöscht).',
+          after = 'elitr, Einfügung durch Änderung der Gleichbleibend, einsetzt.';
+
+      var diff = diffService.diff(before, after);
+      expect(diff).toBe('elitr<del>. einsetzt. VERSCHLUCKT noch die sog.</del><ins>, Einfügung durch Änderung der</ins> Gleichbleibend<del> (Wird gelöscht).</del><ins>, einsetzt.</ins>');
+    });
   });
 
   describe('ignoring line numbers', function () {