Support regular textbox context menu functions in the EquationTextBox (#1065)

* Add context menu items back

* Disable if no selection

src/Calculator/Controls/EquationTextBox.cpp

@@ -44,6 +44,11 @@ void EquationTextBox::OnApplyTemplate()
     m_kgfEquationMenuItem = dynamic_cast<MenuFlyoutItem ^>(GetTemplateChild("FunctionAnalysisMenuItem"));
     m_removeMenuItem = dynamic_cast<MenuFlyoutItem ^>(GetTemplateChild("RemoveFunctionMenuItem"));
     m_colorChooserMenuItem = dynamic_cast<MenuFlyoutItem ^>(GetTemplateChild("ChangeFunctionStyleMenuItem"));
+    m_cutMenuItem = dynamic_cast<MenuFlyoutItem ^>(GetTemplateChild("CutMenuItem"));
+    m_copyMenuItem = dynamic_cast<MenuFlyoutItem ^>(GetTemplateChild("CopyMenuItem"));
+    m_pasteMenuItem = dynamic_cast<MenuFlyoutItem ^>(GetTemplateChild("PasteMenuItem"));
+    m_undoMenuItem = dynamic_cast<MenuFlyoutItem ^>(GetTemplateChild("UndoMenuItem"));
+    m_selectAllMenuItem = dynamic_cast<MenuFlyoutItem ^>(GetTemplateChild("SelectAllMenuItem"));
 
     auto resProvider = AppResourceProvider::GetInstance();
 
@@ -65,7 +70,8 @@ void EquationTextBox::OnApplyTemplate()
 
         auto equationButtonMessage = LocalizationStringUtil::GetLocalizedString(
             m_equationButton->IsChecked->Value ? resProvider->GetResourceString(L"showEquationButtonToolTip")
-                                               : resProvider->GetResourceString(L"hideEquationButtonToolTip"), EquationButtonContentIndex);
+                                               : resProvider->GetResourceString(L"hideEquationButtonToolTip"),
+            EquationButtonContentIndex);
 
         toolTip->Content = equationButtonMessage;
         ToolTipService::SetToolTip(m_equationButton, toolTip);
@@ -122,6 +128,31 @@ void EquationTextBox::OnApplyTemplate()
         ColorChooserFlyout->Closed += ref new EventHandler<Object ^>(this, &EquationTextBox::OnColorFlyoutClosed);
     }
 
+    if (m_cutMenuItem != nullptr)
+    {
+        m_cutMenuItem->Click += ref new RoutedEventHandler(this, &EquationTextBox::OnCutClicked);
+    }
+
+    if (m_copyMenuItem != nullptr)
+    {
+        m_copyMenuItem->Click += ref new RoutedEventHandler(this, &EquationTextBox::OnCopyClicked);
+    }
+
+    if (m_pasteMenuItem != nullptr)
+    {
+        m_pasteMenuItem->Click += ref new RoutedEventHandler(this, &EquationTextBox::OnPasteClicked);
+    }
+
+    if (m_undoMenuItem != nullptr)
+    {
+        m_undoMenuItem->Click += ref new RoutedEventHandler(this, &EquationTextBox::OnUndoClicked);
+    }
+
+    if (m_selectAllMenuItem != nullptr)
+    {
+        m_selectAllMenuItem->Click += ref new RoutedEventHandler(this, &EquationTextBox::OnSelectAllClicked);
+    }
+
     UpdateCommonVisualState();
     UpdateButtonsVisualState();
 }
@@ -208,7 +239,8 @@ void EquationTextBox::OnEquationButtonClicked(Object ^ sender, RoutedEventArgs ^
 
     auto equationButtonMessage = LocalizationStringUtil::GetLocalizedString(
         m_equationButton->IsChecked->Value ? resProvider->GetResourceString(L"showEquationButtonToolTip")
-                                           : resProvider->GetResourceString(L"hideEquationButtonToolTip"), EquationButtonContentIndex);
+                                           : resProvider->GetResourceString(L"hideEquationButtonToolTip"),
+        EquationButtonContentIndex);
 
     toolTip->Content = equationButtonMessage;
     ToolTipService::SetToolTip(m_equationButton, toolTip);
@@ -256,6 +288,46 @@ void EquationTextBox::OnFunctionButtonClicked(Object ^ sender, RoutedEventArgs ^
     KeyGraphFeaturesButtonClicked(this, ref new RoutedEventArgs());
 }
 
+void EquationTextBox::OnCutClicked(Object ^ sender, RoutedEventArgs ^ e)
+{
+    if (m_richEditBox != nullptr)
+    {
+        m_richEditBox->TextDocument->Selection->Cut();
+    }
+}
+
+void EquationTextBox::OnCopyClicked(Object ^ sender, RoutedEventArgs ^ e)
+{
+    if (m_richEditBox != nullptr)
+    {
+        m_richEditBox->TextDocument->Selection->Copy();
+    }
+}
+
+void EquationTextBox::OnPasteClicked(Object ^ sender, RoutedEventArgs ^ e)
+{
+    if (m_richEditBox != nullptr)
+    {
+        m_richEditBox->TextDocument->Selection->Paste(0);
+    }
+}
+
+void EquationTextBox::OnSelectAllClicked(Object ^ sender, RoutedEventArgs ^ e)
+{
+    if (m_richEditBox != nullptr)
+    {
+        m_richEditBox->TextDocument->Selection->SetRange(0, m_richEditBox->TextDocument->Selection->EndPosition);
+    }
+}
+
+void EquationTextBox::OnUndoClicked(Object ^ sender, RoutedEventArgs ^ e)
+{
+    if (m_richEditBox != nullptr)
+    {
+        m_richEditBox->TextDocument->Undo();
+    }
+}
+
 void EquationTextBox::UpdateButtonsVisualState()
 {
     String ^ state;
@@ -355,6 +427,26 @@ void EquationTextBox::OnRichEditMenuOpened(Object ^ /*sender*/, Object ^ /*args*
     {
         m_colorChooserMenuItem->IsEnabled = !HasError && !IsAddEquationMode;
     }
+
+    if (m_richEditBox != nullptr && m_cutMenuItem != nullptr)
+    {
+        m_cutMenuItem->IsEnabled = m_richEditBox->TextDocument->CanCopy() && m_richEditBox->TextDocument->Selection->Length > 0;
+    }
+
+    if (m_richEditBox != nullptr && m_copyMenuItem != nullptr)
+    {
+        m_copyMenuItem->IsEnabled = m_richEditBox->TextDocument->CanCopy() && m_richEditBox->TextDocument->Selection->Length > 0;
+    }
+
+    if (m_richEditBox != nullptr && m_pasteMenuItem != nullptr)
+    {
+        m_pasteMenuItem->IsEnabled = m_richEditBox->TextDocument->CanPaste();
+    }
+
+    if (m_richEditBox != nullptr && m_undoMenuItem != nullptr)
+    {
+        m_undoMenuItem->IsEnabled = m_richEditBox->TextDocument->CanUndo();
+    }
 }
 
 void EquationTextBox::OnIsAddEquationModePropertyChanged(bool /*oldValue*/, bool /*newValue*/)

src/Calculator/Controls/EquationTextBox.h

@@ -60,6 +60,12 @@ namespace CalculatorApp
             void OnFunctionButtonClicked(Platform::Object^ sender, Windows::UI::Xaml::RoutedEventArgs^ e);
             void OnRichEditMenuOpened(Platform::Object ^ sender, Platform::Object ^ args);
 
+            void OnCutClicked(Platform::Object ^ sender, Windows::UI::Xaml::RoutedEventArgs ^ e);
+            void OnCopyClicked(Platform::Object ^ sender, Windows::UI::Xaml::RoutedEventArgs ^ e);
+            void OnPasteClicked(Platform::Object ^ sender, Windows::UI::Xaml::RoutedEventArgs ^ e);
+            void OnUndoClicked(Platform::Object ^ sender, Windows::UI::Xaml::RoutedEventArgs ^ e);
+            void OnSelectAllClicked(Platform::Object ^ sender, Windows::UI::Xaml::RoutedEventArgs ^ e);
+
             void OnColorFlyoutOpened(Platform::Object ^ sender, Platform::Object ^ e);
             void OnColorFlyoutClosed(Platform::Object ^ sender, Platform::Object ^ e);
 
@@ -73,6 +79,11 @@ namespace CalculatorApp
             Windows::UI::Xaml::Controls::Primitives::ToggleButton ^ m_colorChooserButton;
 
             Windows::UI::Xaml::Controls::MenuFlyout^ m_richEditContextMenu;
+            Windows::UI::Xaml::Controls::MenuFlyoutItem ^ m_cutMenuItem;
+            Windows::UI::Xaml::Controls::MenuFlyoutItem ^ m_copyMenuItem;
+            Windows::UI::Xaml::Controls::MenuFlyoutItem ^ m_pasteMenuItem;
+            Windows::UI::Xaml::Controls::MenuFlyoutItem ^ m_undoMenuItem;
+            Windows::UI::Xaml::Controls::MenuFlyoutItem ^ m_selectAllMenuItem;
             Windows::UI::Xaml::Controls::MenuFlyoutItem^ m_kgfEquationMenuItem;
             Windows::UI::Xaml::Controls::MenuFlyoutItem^ m_removeMenuItem;
             Windows::UI::Xaml::Controls::MenuFlyoutItem^ m_colorChooserMenuItem;

src/Calculator/Resources/en-US/Resources.resw

@@ -4266,4 +4266,24 @@
     <value>Copy</value>
     <comment>Copy menu item for the graph context menu</comment>
   </data>
+  <data name="cutEquationMenuItem.Text" xml:space="preserve">
+    <value>Cut</value>
+    <comment>Cut menu item from the Equation TextBox</comment>
+  </data>
+  <data name="copyEquationMenuItem.Text" xml:space="preserve">
+    <value>Copy</value>
+    <comment>Copy menu item from the Equation TextBox</comment>
+  </data>
+  <data name="pasteEquationMenuItem.Text" xml:space="preserve">
+    <value>Paste</value>
+    <comment>Paste menu item from the Equation TextBox</comment>
+  </data>
+  <data name="undoEquationMenuItem.Text" xml:space="preserve">
+    <value>Undo</value>
+    <comment>Undo menu item from the Equation TextBox</comment>
+  </data>
+  <data name="selectAllEquationMenuItem.Text" xml:space="preserve">
+    <value>Select All</value>
+    <comment>Select all menu item from the Equation TextBox</comment>
+  </data>
 </root>

src/Calculator/Views/GraphingCalculator/EquationInputArea.xaml

@@ -582,6 +582,20 @@
                                                                   TextWrapping="NoWrap">
                                             <controls:MathRichEditBox.ContextFlyout>
                                                 <MenuFlyout x:Name="MathRichEditContextMenu">
+                                                    <MenuFlyoutItem x:Name="CutMenuItem"
+                                                                    x:Uid="cutEquationMenuItem"
+                                                                    Icon="Cut"/>
+                                                    <MenuFlyoutItem x:Name="CopyMenuItem"
+                                                                    x:Uid="copyEquationMenuItem"
+                                                                    Icon="Copy"/>
+                                                    <MenuFlyoutItem x:Name="PasteMenuItem"
+                                                                    x:Uid="pasteEquationMenuItem"
+                                                                    Icon="Paste"/>
+                                                    <MenuFlyoutItem x:Name="UndoMenuItem"
+                                                                    x:Uid="undoEquationMenuItem"
+                                                                    Icon="Undo"/>
+                                                    <MenuFlyoutItem x:Name="SelectAllMenuItem" x:Uid="selectAllEquationMenuItem"/>
+                                                    <MenuFlyoutSeparator/>
                                                     <MenuFlyoutItem x:Name="FunctionAnalysisMenuItem">
                                                         <MenuFlyoutItem.Icon>
                                                             <FontIcon FontFamily="{StaticResource CalculatorFontFamily}" Glyph="&#xE3B5;"/>