Implement cell size customizations

doc/cascadia/profiles.schema.json

@@ -296,6 +296,13 @@
       },
       "type": "object"
     },
+    "CSSLengthPercentage": {
+      "pattern": "^[+-]?\\d+(?:\\.\\d+)?(?:%|ch|pt|px)?$",
+      "type": [
+        "string",
+        "null"
+      ]
+    },
     "ProfileGuid": {
       "default": "{}",
       "pattern": "^\\{[a-fA-F0-9]{8}-[a-fA-F0-9]{4}-[a-fA-F0-9]{4}-[a-fA-F0-9]{4}-[a-fA-F0-9]{12}\\}$",
@@ -2086,6 +2093,19 @@
             "null"
           ]
         },
+        "cellSize": {
+          "type": "object",
+          "properties": {
+            "height": {
+              "$ref": "#/$defs/CSSLengthPercentage",
+              "description": "Override the height of the terminal's cells. The override works similar to CSS' line-height. Defaults to the sum of the natural glyph ascend, descend and line-gap of the primary font rounded to the nearest pixel. The default is usually quite close to setting this to 1.2."
+            },
+            "width": {
+              "$ref": "#/$defs/CSSLengthPercentage",
+              "description": "Override the width of the terminal's cells. The override works similar to CSS' line-height. Defaults to the natural glyph advance width of the primary font rounded to the nearest pixel."
+            }
+          }
+        },
         "backgroundImage": {
           "description": "Sets the file location of the image to draw over the window background.",
           "oneOf": [

src/cascadia/TerminalControl/ControlCore.cpp

@@ -713,6 +713,8 @@ namespace winrt::Microsoft::Terminal::Control::implementation
 
         auto lock = _terminal->LockForWriting();
 
+        _cellSizeX = CSSLengthPercentage::FromString(_settings->CellSizeX().c_str());
+        _cellSizeY = CSSLengthPercentage::FromString(_settings->CellSizeY().c_str());
         _runtimeOpacity = std::nullopt;
         _runtimeUseAcrylic = std::nullopt;
 
@@ -871,6 +873,8 @@ namespace winrt::Microsoft::Terminal::Control::implementation
         _actualFont = { fontFace, 0, fontWeight.Weight, _desiredFont.GetEngineSize(), CP_UTF8, false };
         _actualFontFaceName = { fontFace };
 
+        _desiredFont.SetCellSizes(_cellSizeX, _cellSizeY);
+
         const auto before = _actualFont.GetSize();
         _updateFont();
         const auto after = _actualFont.GetSize();

src/cascadia/TerminalControl/ControlCore.h

@@ -257,6 +257,8 @@ namespace winrt::Microsoft::Terminal::Control::implementation
         FontInfoDesired _desiredFont;
         FontInfo _actualFont;
         winrt::hstring _actualFontFaceName;
+        CSSLengthPercentage _cellSizeX;
+        CSSLengthPercentage _cellSizeY;
 
         // storage location for the leading surrogate of a utf-16 surrogate pair
         std::optional<wchar_t> _leadingSurrogate{ std::nullopt };

src/cascadia/TerminalControl/IControlSettings.idl

@@ -42,6 +42,8 @@ namespace Microsoft.Terminal.Control
         String Padding { get; };
         Windows.Foundation.Collections.IMap<String, UInt32> FontFeatures { get; };
         Windows.Foundation.Collections.IMap<String, Single> FontAxes { get; };
+        String CellSizeX { get; };
+        String CellSizeY { get; };
 
         Microsoft.Terminal.Control.IKeyBindings KeyBindings { get; };
 

src/cascadia/TerminalSettingsEditor/Appearances.cpp

@@ -49,6 +49,88 @@ namespace winrt::Microsoft::Terminal::Settings::Editor::implementation
         }
     }
 
+    double AppearanceViewModel::LineHeight() const noexcept
+    {
+        const auto cellSizeY = _appearance.SourceProfile().CellSizeY();
+        const auto str = cellSizeY.c_str();
+
+        auto& errnoRef = errno; // Nonzero cost, pay it once.
+        errnoRef = 0;
+
+        wchar_t* end;
+        const auto value = std::wcstod(str, &end);
+
+        return str == end || errnoRef == ERANGE ? NAN : value;
+    }
+
+    void AppearanceViewModel::LineHeight(const double value)
+    {
+        wchar_t buffer[16];
+        std::wstring_view view;
+
+        if (value >= 0.1 && value <= 10.0)
+        {
+            auto length = gsl::narrow<size_t>(swprintf_s(&buffer[0], std::size(buffer), L"%.6f", value));
+            const auto separator = std::wstring_view{ &buffer[0], length }.find(L'.');
+
+            if (separator != std::wstring_view::npos)
+            {
+                for (; length > separator && buffer[length - 1] == L'0'; --length)
+                {
+                }
+                // winrt::hstring expects a null-terminated string
+                buffer[length] = L'\0';
+            }
+
+            view = { &buffer[0], length };
+        }
+
+        const auto profile = _appearance.SourceProfile();
+
+        if (profile.CellSizeY() != view)
+        {
+            if (view.empty())
+            {
+                profile.ClearCellSizeY();
+            }
+            else
+            {
+                profile.CellSizeY(view);
+            }
+            _NotifyChanges(L"HasLineHeight", L"LineHeight");
+        }
+    }
+
+    bool AppearanceViewModel::HasLineHeight()
+    {
+        return _appearance.SourceProfile().HasCellSizeY();
+    }
+
+    void AppearanceViewModel::ClearLineHeight()
+    {
+        LineHeight({});
+    }
+
+    Model::Profile AppearanceViewModel::LineHeightOverrideSource()
+    {
+        return _appearance.SourceProfile().CellSizeYOverrideSource();
+    }
+
+    void AppearanceViewModel::SetFontWeightFromDouble(double fontWeight)
+    {
+        FontWeight(Converters::DoubleToFontWeight(fontWeight));
+    }
+
+    void AppearanceViewModel::SetBackgroundImageOpacityFromPercentageValue(double percentageValue)
+    {
+        BackgroundImageOpacity(Converters::PercentageValueToPercentage(percentageValue));
+    }
+
+    void AppearanceViewModel::SetBackgroundImagePath(winrt::hstring path)
+    {
+        BackgroundImagePath(path);
+    }
+
     bool AppearanceViewModel::UseDesktopBGImage()
     {
         return BackgroundImagePath() == L"desktopWallpaper";
@@ -83,6 +165,16 @@ namespace winrt::Microsoft::Terminal::Settings::Editor::implementation
         return BackgroundImagePath() != L"";
     }
 
+    IMapView<hstring, Model::ColorScheme> AppearanceViewModel::Schemes()
+    {
+        return _Schemes;
+    }
+
+    void AppearanceViewModel::Schemes(const IMapView<hstring, Model::ColorScheme>& val)
+    {
+        _Schemes = val;
+    }
+
     DependencyProperty Appearances::_AppearanceProperty{ nullptr };
 
     Appearances::Appearances() :
@@ -96,10 +188,14 @@ namespace winrt::Microsoft::Terminal::Settings::Editor::implementation
             // > .NET rounds to 12 significant digits when displaying doubles, so we will [...]
             // ...obviously not do that, because this is an UI element for humans. This prevents
             // issues when displaying 32-bit floats, because WinUI is unaware about their existence.
-            SignificantDigitsNumberRounder rounder;
-            rounder.SignificantDigits(6);
-            // BODGY: Depends on WinUI internals.
-            _fontSizeBox().NumberFormatter().as<DecimalFormatter>().NumberRounder(rounder);
+            IncrementNumberRounder rounder;
+            rounder.Increment(1e-6);
+
+            for (const auto& box : { _fontSizeBox(), _lineHeightBox() })
+            {
+                // BODGY: Depends on WinUI internals.
+                box.NumberFormatter().as<DecimalFormatter>().NumberRounder(rounder);
+            }
         }
 
         INITIALIZE_BINDABLE_ENUM_SETTING(CursorShape, CursorStyle, winrt::Microsoft::Terminal::Core::CursorStyle, L"Profile_CursorShape", L"Content");

src/cascadia/TerminalSettingsEditor/Appearances.h

@@ -51,26 +51,22 @@ namespace winrt::Microsoft::Terminal::Settings::Editor::implementation
     public:
         AppearanceViewModel(const Model::AppearanceConfig& appearance);
 
-        void SetFontWeightFromDouble(double fontWeight)
-        {
-            FontWeight(winrt::Microsoft::Terminal::Settings::Editor::Converters::DoubleToFontWeight(fontWeight));
-        }
-        void SetBackgroundImageOpacityFromPercentageValue(double percentageValue)
-        {
-            BackgroundImageOpacity(winrt::Microsoft::Terminal::Settings::Editor::Converters::PercentageValueToPercentage(percentageValue));
-        }
-        void SetBackgroundImagePath(winrt::hstring path)
-        {
-            BackgroundImagePath(path);
-        }
+        double LineHeight() const noexcept;
+        void LineHeight(const double value);
+        bool HasLineHeight();
+        void ClearLineHeight();
+        Model::Profile LineHeightOverrideSource();
+        void SetFontWeightFromDouble(double fontWeight);
+        void SetBackgroundImageOpacityFromPercentageValue(double percentageValue);
+        void SetBackgroundImagePath(winrt::hstring path);
 
         // background image
         bool UseDesktopBGImage();
         void UseDesktopBGImage(const bool useDesktop);
         bool BackgroundImageSettingsVisible();
 
-        Windows::Foundation::Collections::IMapView<hstring, Model::ColorScheme> Schemes() { return _Schemes; }
-        void Schemes(const Windows::Foundation::Collections::IMapView<hstring, Model::ColorScheme>& val) { _Schemes = val; }
+        Windows::Foundation::Collections::IMapView<hstring, Model::ColorScheme> Schemes();
+        void Schemes(const Windows::Foundation::Collections::IMapView<hstring, Model::ColorScheme>& val);
 
         WINRT_PROPERTY(bool, IsDefault, false);
         WINRT_PROPERTY(IHostedInWindow, WindowRoot, nullptr);
@@ -99,6 +95,7 @@ namespace winrt::Microsoft::Terminal::Settings::Editor::implementation
         Model::AppearanceConfig _appearance;
         winrt::hstring _lastBgImagePath;
         Windows::Foundation::Collections::IMapView<hstring, Model::ColorScheme> _Schemes;
+        float _cachedLineHeight = 0;
     };
 
     struct Appearances : AppearancesT<Appearances>

src/cascadia/TerminalSettingsEditor/Appearances.idl

@@ -35,6 +35,7 @@ namespace Microsoft.Terminal.Settings.Editor
 
         OBSERVABLE_PROJECTED_APPEARANCE_SETTING(String, FontFace);
         OBSERVABLE_PROJECTED_APPEARANCE_SETTING(Single, FontSize);
+        OBSERVABLE_PROJECTED_APPEARANCE_SETTING(Double, LineHeight);
         OBSERVABLE_PROJECTED_APPEARANCE_SETTING(Windows.UI.Text.FontWeight, FontWeight);
 
         OBSERVABLE_PROJECTED_APPEARANCE_SETTING(String, ColorSchemeName);

src/cascadia/TerminalSettingsEditor/Appearances.xaml

@@ -104,6 +104,24 @@
                                 Value="{x:Bind Appearance.FontSize, Mode=TwoWay}" />
             </local:SettingContainer>
 
+            <!--  Line Height  -->
+            <local:SettingContainer x:Uid="Profile_LineHeight"
+                                    ClearSettingValue="{x:Bind Appearance.ClearLineHeight}"
+                                    HasSettingValue="{x:Bind Appearance.HasLineHeight, Mode=OneWay}"
+                                    SettingOverrideSource="{x:Bind Appearance.LineHeightOverrideSource, Mode=OneWay}"
+                                    Visibility="{x:Bind Appearance.IsDefault, Mode=OneWay}">
+                <muxc:NumberBox x:Name="_lineHeightBox"
+                                x:Uid="Profile_LineHeightBox"
+                                AcceptsExpression="False"
+                                LargeChange="0.1"
+                                Maximum="10"
+                                Minimum="0.1"
+                                SmallChange="0.1"
+                                SpinButtonPlacementMode="Compact"
+                                Style="{StaticResource NumberBoxSettingStyle}"
+                                Value="{x:Bind Appearance.LineHeight, Mode=TwoWay}" />
+            </local:SettingContainer>
+
             <!--  Font Weight  -->
             <local:SettingContainer x:Name="FontWeightContainer"
                                     x:Uid="Profile_FontWeight"

src/cascadia/TerminalSettingsEditor/Resources/en-US/Resources.resw

@@ -894,6 +894,22 @@
     <value>Size of the font in points.</value>
     <comment>A description for what the "font size" setting does. Presented near "Profile_FontSize".</comment>
   </data>
+  <data name="Profile_LineHeight.Header" xml:space="preserve">
+    <value>Line height</value>
+    <comment>Header for a control that sets the text line height.</comment>
+  </data>
+  <data name="Profile_LineHeightBox.[using:Windows.UI.Xaml.Automation]AutomationProperties.Name" xml:space="preserve">
+    <value>Line height</value>
+    <comment>Header for a control that sets the text line height.</comment>
+  </data>
+  <data name="Profile_LineHeight.HelpText" xml:space="preserve">
+    <value>Sets the height of each line in the terminal as a multiple of the font size. The default depends on your font and is usually around 1.2.</value>
+    <comment>A description for what the "line height" setting does. Presented near "Profile_LineHeight".</comment>
+  </data>
+  <data name="Profile_LineHeightBox.PlaceholderText" xml:space="preserve">
+    <value>1.2</value>
+    <comment>"1.2" is a decimal number.</comment>
+  </data>
   <data name="Profile_FontWeightComboBox.[using:Windows.UI.Xaml.Automation]AutomationProperties.Name" xml:space="preserve">
     <value>Font weight</value>
     <comment>Name for a control to select the weight (i.e. bold, thin, etc.) of the text in the app.</comment>

src/cascadia/TerminalSettingsModel/CascadiaSettings.cpp

@@ -295,7 +295,9 @@ Model::Profile CascadiaSettings::DuplicateProfile(const Model::Profile& source)
     MTSM_PROFILE_SETTINGS(DUPLICATE_PROFILE_SETTINGS)
 #undef DUPLICATE_PROFILE_SETTINGS
 
-    // These two aren't in MTSM_PROFILE_SETTINGS because they're special
+    // These aren't in MTSM_PROFILE_SETTINGS because they're special
+    DUPLICATE_SETTING_MACRO(CellSizeX);
+    DUPLICATE_SETTING_MACRO(CellSizeY);
     DUPLICATE_SETTING_MACRO(TabColor);
     DUPLICATE_SETTING_MACRO(Padding);
 

src/cascadia/TerminalSettingsModel/Profile.cpp

@@ -27,6 +27,9 @@ static constexpr std::string_view SourceKey{ "source" };
 static constexpr std::string_view HiddenKey{ "hidden" };
 
 static constexpr std::string_view FontInfoKey{ "font" };
+static constexpr std::string_view CellSizeKey{ "cellSize" };
+static constexpr std::string_view CellSizeXKey{ "width" };
+static constexpr std::string_view CellSizeYKey{ "height" };
 static constexpr std::string_view PaddingKey{ "padding" };
 static constexpr std::string_view TabColorKey{ "tabColor" };
 static constexpr std::string_view UnfocusedAppearanceKey{ "unfocusedAppearance" };
@@ -102,6 +105,8 @@ winrt::com_ptr<Profile> Profile::CopySettings() const
     profile->_Name = _Name;
     profile->_Source = _Source;
     profile->_Hidden = _Hidden;
+    profile->_CellSizeX = _CellSizeX;
+    profile->_CellSizeY = _CellSizeY;
     profile->_TabColor = _TabColor;
     profile->_Padding = _Padding;
 
@@ -171,10 +176,14 @@ void Profile::LayerJson(const Json::Value& json)
     JsonUtils::GetValueForKey(json, HiddenKey, _Hidden);
     JsonUtils::GetValueForKey(json, SourceKey, _Source);
 
+    if (const auto& cellSizeJSON = json[JsonKey(CellSizeKey)])
+    {
+        JsonUtils::GetValueForKey(cellSizeJSON, CellSizeXKey, _CellSizeX);
+        JsonUtils::GetValueForKey(cellSizeJSON, CellSizeYKey, _CellSizeY);
+    }
     // Padding was never specified as an integer, but it was a common working mistake.
     // Allow it to be permissive.
     JsonUtils::GetValueForKey(json, PaddingKey, _Padding, JsonUtils::OptionalConverter<hstring, JsonUtils::PermissiveStringConverter<std::wstring>>{});
-
     JsonUtils::GetValueForKey(json, TabColorKey, _TabColor);
 
 #define PROFILE_SETTINGS_LAYER_JSON(type, name, jsonKey, ...) \
@@ -313,9 +322,14 @@ Json::Value Profile::ToJson() const
     JsonUtils::SetValueForKey(json, HiddenKey, writeBasicSettings ? Hidden() : _Hidden);
     JsonUtils::SetValueForKey(json, SourceKey, writeBasicSettings ? Source() : _Source);
 
-    // PermissiveStringConverter is unnecessary for serialization
+    if (_CellSizeX || _CellSizeY)
+    {
+        Json::Value cellSizeJSON{ Json::ValueType::objectValue };
+        JsonUtils::SetValueForKey(cellSizeJSON, CellSizeXKey, _CellSizeX);
+        JsonUtils::SetValueForKey(cellSizeJSON, CellSizeYKey, _CellSizeY);
+        json[JsonKey(CellSizeKey)] = std::move(cellSizeJSON);
+    }
     JsonUtils::SetValueForKey(json, PaddingKey, _Padding);
-
     JsonUtils::SetValueForKey(json, TabColorKey, _TabColor);
 
 #define PROFILE_SETTINGS_TO_JSON(type, name, jsonKey, ...) \

src/cascadia/TerminalSettingsModel/Profile.h

@@ -116,6 +116,8 @@ namespace winrt::Microsoft::Terminal::Settings::Model::implementation
         INHERITABLE_SETTING(Model::Profile, hstring, Source);
         INHERITABLE_SETTING(Model::Profile, bool, Hidden, false);
         INHERITABLE_SETTING(Model::Profile, guid, Guid, _GenerateGuidForProfile(Name(), Source()));
+        INHERITABLE_SETTING(Model::Profile, hstring, CellSizeX);
+        INHERITABLE_SETTING(Model::Profile, hstring, CellSizeY);
         INHERITABLE_SETTING(Model::Profile, hstring, Padding, DEFAULT_PADDING);
 
 #define PROFILE_SETTINGS_INITIALIZE(type, name, jsonKey, ...) \

src/cascadia/TerminalSettingsModel/Profile.idl

@@ -71,6 +71,8 @@ namespace Microsoft.Terminal.Settings.Model
         String EvaluatedStartingDirectory { get; };
 
         FontConfig FontInfo { get; };
+        INHERITABLE_PROFILE_SETTING(String, CellSizeX);
+        INHERITABLE_PROFILE_SETTING(String, CellSizeY);
 
         IAppearanceConfig DefaultAppearance { get; };
         INHERITABLE_PROFILE_SETTING(IAppearanceConfig, UnfocusedAppearance);

src/cascadia/TerminalSettingsModel/TerminalSettings.cpp

@@ -253,6 +253,8 @@ namespace winrt::Microsoft::Terminal::Settings::Model::implementation
         _FontWeight = profile.FontInfo().FontWeight();
         _FontFeatures = profile.FontInfo().FontFeatures();
         _FontAxes = profile.FontInfo().FontAxes();
+        _CellSizeX = profile.CellSizeX();
+        _CellSizeY = profile.CellSizeY();
         _Padding = profile.Padding();
 
         _Commandline = profile.Commandline();

src/cascadia/TerminalSettingsModel/TerminalSettings.h

@@ -126,6 +126,8 @@ namespace winrt::Microsoft::Terminal::Settings::Model::implementation
         INHERITABLE_SETTING(Model::TerminalSettings, winrt::Windows::UI::Text::FontWeight, FontWeight);
         INHERITABLE_SETTING(Model::TerminalSettings, IFontAxesMap, FontAxes);
         INHERITABLE_SETTING(Model::TerminalSettings, IFontFeatureMap, FontFeatures);
+        INHERITABLE_SETTING(Model::TerminalSettings, hstring, CellSizeX);
+        INHERITABLE_SETTING(Model::TerminalSettings, hstring, CellSizeY);
 
         INHERITABLE_SETTING(Model::TerminalSettings, Model::ColorScheme, AppliedColorScheme);
         INHERITABLE_SETTING(Model::TerminalSettings, hstring, BackgroundImage);