Add new ui::TranslationDelegate to translate Entry popup items

Parts of this commit are from #4968 and will be useful to reuse in the
multiline TextEdit widget.

Co-authored-by: Christian Kaiser <info@ckaiser.com.ar>

data/strings/en.ini

@@ -1,5 +1,5 @@
 # Aseprite
-# Copyright (C) 2018-2024  Igara Studio S.A.
+# Copyright (C) 2018-2025  Igara Studio S.A.
 # Copyright (C) 2016-2018  David Capello
 #
 # This work is licensed under the Creative Commons Attribution 4.0
@@ -813,6 +813,12 @@ opacity = Opacity:
 tolerance = Tolerance:
 show_more = Show more...
 
+[general_text]
+copy = &Copy
+cut = Cu&t
+paste = &Paste
+select_all = Select &All
+
 [gif_options]
 title = GIF Options
 general_options = General Options:

src/app/util/clipboard.cpp

@@ -1,5 +1,5 @@
 // Aseprite
-// Copyright (C) 2019-2024  Igara Studio S.A.
+// Copyright (C) 2019-2025  Igara Studio S.A.
 // Copyright (C) 2001-2018  David Capello
 //
 // This program is distributed under the terms of
@@ -198,6 +198,16 @@ bool Clipboard::getClipboardText(std::string& text)
   }
 }
 
+bool Clipboard::hasClipboardText()
+{
+  if (use_native_clipboard()) {
+    return clip::has(clip::text_format());
+  }
+  else {
+    return !m_data->text.empty();
+  }
+}
+
 void Clipboard::setData(Image* image,
                         Mask* mask,
                         Palette* palette,

src/app/util/clipboard.h

@@ -89,6 +89,7 @@ public:
   // ui::ClipboardDelegate impl
   void setClipboardText(const std::string& text) override;
   bool getClipboardText(std::string& text) override;
+  bool hasClipboardText() override;
 
   bool setNativeBitmap(const doc::Image* image,
                        const doc::Mask* mask,

src/ui/clipboard_delegate.h

@@ -1,4 +1,5 @@
 // Aseprite UI Library
+// Copyright (C) 2025  Igara Studio S.A.
 // Copyright (C) 2018  David Capello
 //
 // This file is released under the terms of the MIT license.
@@ -17,6 +18,7 @@ public:
   virtual ~ClipboardDelegate() {}
   virtual void setClipboardText(const std::string& text) = 0;
   virtual bool getClipboardText(std::string& text) = 0;
+  virtual bool hasClipboardText() = 0;
 };
 
 } // namespace ui

src/ui/entry.cpp

@@ -1,5 +1,5 @@
 // Aseprite UI Library
-// Copyright (C) 2018-2024  Igara Studio S.A.
+// Copyright (C) 2018-2025  Igara Studio S.A.
 // Copyright (C) 2001-2018  David Capello
 //
 // This file is released under the terms of the MIT license.
@@ -15,6 +15,7 @@
 #include "os/system.h"
 #include "text/draw_text.h"
 #include "text/font.h"
+#include "ui/clipboard_delegate.h"
 #include "ui/display.h"
 #include "ui/menu.h"
 #include "ui/message.h"
@@ -23,6 +24,7 @@
 #include "ui/system.h"
 #include "ui/theme.h"
 #include "ui/timer.h"
+#include "ui/translation_delegate.h"
 #include "ui/widget.h"
 
 #include <algorithm>
@@ -872,20 +874,37 @@ bool Entry::isPosInSelection(int pos)
 void Entry::showEditPopupMenu(const gfx::Point& pt)
 {
   Menu menu;
-  MenuItem cut("Cut");
-  MenuItem copy("Copy");
-  MenuItem paste("Paste");
+
+  auto* clipboard = UISystem::instance()->clipboardDelegate();
+  if (!clipboard)
+    return;
+
+  auto* translate = UISystem::instance()->translationDelegate();
+  ASSERT(translate); // We provide UISystem as default translation delegate
+  if (!translate)
+    return;
+
+  MenuItem cut(translate->cut());
+  MenuItem copy(translate->copy());
+  MenuItem paste(translate->paste());
+  MenuItem selectAll(translate->selectAll());
   menu.addChild(&cut);
   menu.addChild(&copy);
   menu.addChild(&paste);
+  menu.addChild(new MenuSeparator);
+  menu.addChild(&selectAll);
+
+  for (auto* item : menu.children())
+    item->processMnemonicFromText();
+
   cut.Click.connect([this] { executeCmd(EntryCmd::Cut, 0, false); });
   copy.Click.connect([this] { executeCmd(EntryCmd::Copy, 0, false); });
   paste.Click.connect([this] { executeCmd(EntryCmd::Paste, 0, false); });
+  selectAll.Click.connect([this] { executeCmd(EntryCmd::SelectAll, 0, false); });
 
-  if (isReadOnly()) {
-    cut.setEnabled(false);
-    paste.setEnabled(false);
-  }
+  copy.setEnabled(m_select >= 0);
+  cut.setEnabled(m_select >= 0 && !isReadOnly());
+  paste.setEnabled(clipboard->hasClipboardText() && !isReadOnly());
 
   menu.showPopup(pt, display());
 }

src/ui/system.cpp

@@ -153,7 +153,7 @@ UISystem* UISystem::instance()
   return g_instance;
 }
 
-UISystem::UISystem() : m_clipboardDelegate(nullptr)
+UISystem::UISystem() : m_clipboardDelegate(nullptr), m_translationDelegate(this)
 {
   ASSERT(!g_instance);
   g_instance = this;

src/ui/system.h

@@ -12,6 +12,7 @@
 #include "gfx/fwd.h"
 #include "ui/base.h"
 #include "ui/cursor_type.h"
+#include "ui/translation_delegate.h"
 
 #include <functional>
 #include <string>
@@ -23,18 +24,22 @@ class Cursor;
 class Display;
 class Widget;
 
-class UISystem {
+class UISystem : public TranslationDelegate {
 public:
   static UISystem* instance();
 
   UISystem();
   ~UISystem();
 
+  ClipboardDelegate* clipboardDelegate() const { return m_clipboardDelegate; }
+  TranslationDelegate* translationDelegate() const { return m_translationDelegate; }
+
   void setClipboardDelegate(ClipboardDelegate* delegate) { m_clipboardDelegate = delegate; }
-  ClipboardDelegate* clipboardDelegate() { return m_clipboardDelegate; }
+  void setTranslationDelegate(TranslationDelegate* delegate) { m_translationDelegate = delegate; }
 
 private:
-  ClipboardDelegate* m_clipboardDelegate;
+  ClipboardDelegate* m_clipboardDelegate = nullptr;
+  TranslationDelegate* m_translationDelegate = nullptr;
 };
 
 void set_multiple_displays(bool multi);

src/ui/translation_delegate.h

@@ -0,0 +1,29 @@
+// Aseprite UI Library
+// Copyright (C) 2025  Igara Studio S.A.
+//
+// This file is released under the terms of the MIT license.
+// Read LICENSE.txt for more information.
+
+#ifndef UI_TRANSLATION_DELEGATE_H_INCLUDED
+#define UI_TRANSLATION_DELEGATE_H_INCLUDED
+#pragma once
+
+#include <string>
+
+namespace ui {
+
+// Translates strings displayed in the ui-lib widgets.
+class TranslationDelegate {
+public:
+  virtual ~TranslationDelegate() {}
+
+  // ui::Entry popup
+  virtual std::string copy() { return "&Copy"; }
+  virtual std::string cut() { return "Cu&t"; }
+  virtual std::string paste() { return "&Paste"; }
+  virtual std::string selectAll() { return "Select &All"; }
+};
+
+} // namespace ui
+
+#endif

src/ui/ui.h

@@ -1,5 +1,5 @@
 // Aseprite UI Library
-// Copyright (C) 2019-2024  Igara Studio S.A.
+// Copyright (C) 2019-2025  Igara Studio S.A.
 // Copyright (C) 2001-2018  David Capello
 //
 // This file is released under the terms of the MIT license.
@@ -66,6 +66,7 @@
 #include "ui/theme.h"
 #include "ui/timer.h"
 #include "ui/tooltips.h"
+#include "ui/translation_delegate.h"
 #include "ui/view.h"
 #include "ui/viewport.h"
 #include "ui/widget.h"