feature: allow merging tags into branches (#671)

Adds "Merge {tag} into {branch}" menu item to tag menu in histories.
The rest is handled by already existing merge code.

src/Resources/Locales/de_DE.axaml

@@ -627,6 +627,7 @@
   <x:String x:Key="Text.TagCM.Copy" xml:space="preserve">Tag-Namen kopieren</x:String>
   <x:String x:Key="Text.TagCM.CopyMessage" xml:space="preserve">Tag-Nachricht kopieren</x:String>
   <x:String x:Key="Text.TagCM.Delete" xml:space="preserve">Lösche ${0}$...</x:String>
+  <x:String x:Key="Text.TagCM.Merge" xml:space="preserve">Merge ${0}$ in ${1}$ hinein...</x:String>
   <x:String x:Key="Text.TagCM.Push" xml:space="preserve">Pushe ${0}$...</x:String>
   <x:String x:Key="Text.URL" xml:space="preserve">URL:</x:String>
   <x:String x:Key="Text.UpdateSubmodules" xml:space="preserve">Submodule aktualisieren</x:String>

src/Resources/Locales/en_US.axaml

@@ -633,6 +633,7 @@
   <x:String x:Key="Text.TagCM.Copy" xml:space="preserve">Copy Tag Name</x:String>
   <x:String x:Key="Text.TagCM.CopyMessage" xml:space="preserve">Copy Tag Message</x:String>
   <x:String x:Key="Text.TagCM.Delete" xml:space="preserve">Delete ${0}$...</x:String>
+  <x:String x:Key="Text.TagCM.Merge" xml:space="preserve">Merge ${0}$ into ${1}$...</x:String>
   <x:String x:Key="Text.TagCM.Push" xml:space="preserve">Push ${0}$...</x:String>
   <x:String x:Key="Text.URL" xml:space="preserve">URL:</x:String>
   <x:String x:Key="Text.UpdateSubmodules" xml:space="preserve">Update Submodules</x:String>

src/Resources/Locales/es_ES.axaml

@@ -631,6 +631,7 @@
   <x:String x:Key="Text.TagCM.Copy" xml:space="preserve">Copiar Nombre de la Etiqueta</x:String>
   <x:String x:Key="Text.TagCM.CopyMessage" xml:space="preserve">Copiar Mensaje de la Etiqueta</x:String>
   <x:String x:Key="Text.TagCM.Delete" xml:space="preserve">Eliminar ${0}$...</x:String>
+  <x:String x:Key="Text.TagCM.Merge" xml:space="preserve">Merge ${0}$ en ${1}$...</x:String>
   <x:String x:Key="Text.TagCM.Push" xml:space="preserve">Push ${0}$...</x:String>
   <x:String x:Key="Text.URL" xml:space="preserve">URL:</x:String>
   <x:String x:Key="Text.UpdateSubmodules" xml:space="preserve">Actualizar Submódulos</x:String>

src/Resources/Locales/fr_FR.axaml

@@ -551,6 +551,7 @@
   <x:String x:Key="Text.Sure" xml:space="preserve">OK</x:String>
   <x:String x:Key="Text.TagCM.Copy" xml:space="preserve">Copy Tag Name</x:String>
   <x:String x:Key="Text.TagCM.Delete" xml:space="preserve">Delete ${0}$...</x:String>
+  <x:String x:Key="Text.TagCM.Merge" xml:space="preserve">Fusionner ${0}$ dans ${1}$...</x:String>
   <x:String x:Key="Text.TagCM.Push" xml:space="preserve">Push ${0}$...</x:String>
   <x:String x:Key="Text.URL" xml:space="preserve">URL :</x:String>
   <x:String x:Key="Text.UpdateSubmodules" xml:space="preserve">Actualiser les sous-modules</x:String>

src/Resources/Locales/pt_BR.axaml

@@ -661,6 +661,7 @@
   <x:String x:Key="Text.TagCM.Copy" xml:space="preserve">Copiar Nome da Tag</x:String>
   <x:String x:Key="Text.TagCM.CopyMessage" xml:space="preserve">Copiar mensage da Tag</x:String>
   <x:String x:Key="Text.TagCM.Delete" xml:space="preserve">Excluir ${0}$...</x:String>
+  <x:String x:Key="Text.TagCM.Merge" xml:space="preserve">Mesclar ${0}$ em ${1}$...</x:String>
   <x:String x:Key="Text.TagCM.Push" xml:space="preserve">Enviar ${0}$...</x:String>
   <x:String x:Key="Text.UpdateSubmodules.All" xml:space="preserve">Todos os submódulos</x:String>
   <x:String x:Key="Text.UpdateSubmodules.Init" xml:space="preserve">Inicializar conforme necessário</x:String>

src/Resources/Locales/ru_RU.axaml

@@ -637,6 +637,7 @@
   <x:String x:Key="Text.TagCM.Copy" xml:space="preserve">Копировать имя метки</x:String>
   <x:String x:Key="Text.TagCM.CopyMessage" xml:space="preserve">Копировать сообщение с метки</x:String>
   <x:String x:Key="Text.TagCM.Delete" xml:space="preserve">Удалить ${0}$...</x:String>
+  <x:String x:Key="Text.TagCM.Merge" xml:space="preserve">Слить ${0}$ в ${1}$...</x:String>
   <x:String x:Key="Text.TagCM.Push" xml:space="preserve">Выложить ${0}$...</x:String>
   <x:String x:Key="Text.URL" xml:space="preserve">Сетевой адрес:</x:String>
   <x:String x:Key="Text.UpdateSubmodules" xml:space="preserve">Обновление подмодулей</x:String>

src/Resources/Locales/zh_CN.axaml

@@ -636,6 +636,7 @@
   <x:String x:Key="Text.TagCM.Copy" xml:space="preserve">复制标签名</x:String>
   <x:String x:Key="Text.TagCM.CopyMessage" xml:space="preserve">复制标签信息</x:String>
   <x:String x:Key="Text.TagCM.Delete" xml:space="preserve">删除 ${0}$...</x:String>
+  <x:String x:Key="Text.TagCM.Merge" xml:space="preserve">合并 ${0}$ 到 ${1}$...</x:String>
   <x:String x:Key="Text.TagCM.Push" xml:space="preserve">推送 ${0}$...</x:String>
   <x:String x:Key="Text.URL" xml:space="preserve">仓库地址 ：</x:String>
   <x:String x:Key="Text.UpdateSubmodules" xml:space="preserve">更新子模块</x:String>

src/Resources/Locales/zh_TW.axaml

@@ -636,6 +636,7 @@
   <x:String x:Key="Text.TagCM.Copy" xml:space="preserve">複製標籤名稱</x:String>
   <x:String x:Key="Text.TagCM.CopyMessage" xml:space="preserve">複製標籤訊息</x:String>
   <x:String x:Key="Text.TagCM.Delete" xml:space="preserve">刪除 ${0}$...</x:String>
+  <x:String x:Key="Text.TagCM.Merge" xml:space="preserve">合併 ${0}$ 到 ${1}$...</x:String>
   <x:String x:Key="Text.TagCM.Push" xml:space="preserve">推送 ${0}$...</x:String>
   <x:String x:Key="Text.URL" xml:space="preserve">存放庫網址:</x:String>
   <x:String x:Key="Text.UpdateSubmodules" xml:space="preserve">更新子模組</x:String>

src/ViewModels/Histories.cs

@@ -365,7 +365,7 @@ namespace SourceGit.ViewModels
             if (tags.Count > 0)
             {
                 foreach (var tag in tags)
-                    FillTagMenu(menu, tag);
+                    FillTagMenu(menu, tag, current, commit.IsMerged);
                 menu.Items.Add(new MenuItem() { Header = "-" });
             }
 
@@ -893,7 +893,7 @@ namespace SourceGit.ViewModels
             menu.Items.Add(submenu);
         }
 
-        private void FillTagMenu(ContextMenu menu, Models.Tag tag)
+        private void FillTagMenu(ContextMenu menu, Models.Tag tag, Models.Branch current, bool merged)
         {
             var submenu = new MenuItem();
             submenu.Header = tag.Name;
@@ -912,6 +912,19 @@ namespace SourceGit.ViewModels
             };
             submenu.Items.Add(push);
 
+            var merge = new MenuItem();
+            merge.Header = new Views.NameHighlightedTextBlock("TagCM.Merge", tag.Name, current.Name);
+            merge.Icon = App.CreateMenuIcon("Icons.Merge");
+            merge.IsEnabled = !merged;
+            merge.Click += (_, e) =>
+            {
+                if (PopupHost.CanCreatePopup())
+                    PopupHost.ShowPopup(new Merge(_repo, tag.Name, current.Name));
+                e.Handled = true;
+            };
+            submenu.Items.Add(merge);
+            submenu.Items.Add(new MenuItem() { Header = "-" });
+
             var delete = new MenuItem();
             delete.Header = new Views.NameHighlightedTextBlock("TagCM.Delete", tag.Name);
             delete.Icon = App.CreateMenuIcon("Icons.Clear");