Не уж то апстрим опять?

Content.Client/Guidebook/Controls/GuideFoodComposition.xaml

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+<BoxContainer xmlns="https://spacestation14.io"
+              Orientation="Horizontal"
+              HorizontalAlignment="Stretch"
+              HorizontalExpand="True"
+              Margin="0 0 0 5">
+    <BoxContainer Name="ReactantsContainer" Orientation="Vertical" HorizontalExpand="True" VerticalAlignment="Center">
+        <Label Name="ReagentLabel"
+               HorizontalExpand="True"
+               HorizontalAlignment="Left"
+               VerticalAlignment="Center"
+               Access="Public"
+               Margin="2 0 0 0"/>
+    </BoxContainer>
+    <BoxContainer Orientation="Vertical" VerticalAlignment="Center">
+        <Label Name="AmountLabel"
+               HorizontalAlignment="Right"
+               VerticalAlignment="Center"
+               Access="Public"
+               Margin="2 0 0 0"/>
+    </BoxContainer>
+</BoxContainer>

Content.Client/Guidebook/Controls/GuideFoodComposition.xaml.cs

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+using Content.Client.UserInterface.ControlExtensions;
+using Content.Shared.Chemistry.Reagent;
+using Content.Shared.FixedPoint;
+using JetBrains.Annotations;
+using Robust.Client.AutoGenerated;
+using Robust.Client.UserInterface.Controls;
+using Robust.Client.UserInterface.XAML;
+
+namespace Content.Client.Guidebook.Controls;
+
+[UsedImplicitly, GenerateTypedNameReferences]
+public sealed partial class GuideFoodComposition : BoxContainer, ISearchableControl
+{
+    public GuideFoodComposition(ReagentPrototype proto, FixedPoint2 quantity)
+    {
+        RobustXamlLoader.Load(this);
+
+        ReagentLabel.Text = proto.LocalizedName;
+        AmountLabel.Text = quantity.ToString();
+    }
+
+    public bool CheckMatchesSearch(string query)
+    {
+        return this.ChildrenContainText(query);
+    }
+
+    public void SetHiddenState(bool state, string query)
+    {
+        Visible = CheckMatchesSearch(query) ? state : !state;
+    }
+}

Content.Client/Guidebook/Controls/GuideFoodEmbed.xaml

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+<BoxContainer xmlns="https://spacestation14.io"
+              xmlns:gfx="clr-namespace:Robust.Client.Graphics;assembly=Robust.Client"
+              Orientation="Vertical"
+              Margin="5 5 5 5">
+    <PanelContainer HorizontalExpand="True">
+        <PanelContainer.PanelOverride>
+            <gfx:StyleBoxFlat BorderThickness="1" BorderColor="#777777"/>
+        </PanelContainer.PanelOverride>
+        <BoxContainer Orientation="Vertical">
+            <PanelContainer Name="NameBackground" HorizontalExpand="True" VerticalExpand="False">
+                <RichTextLabel Name="FoodName" HorizontalAlignment="Center"/>
+            </PanelContainer>
+            <BoxContainer Name="SourcesContainer" HorizontalExpand="True">
+                <Collapsible HorizontalExpand="True">
+                    <CollapsibleHeading Title="{Loc 'guidebook-food-sources-header'}"/>
+                    <CollapsibleBody>
+                        <GridContainer Name="SourcesDescriptionContainer"
+                                       Margin="10 0 10 0"
+                                       Columns="1"
+                                       HSeparationOverride="5"
+                                       HorizontalAlignment="Stretch"
+                                       HorizontalExpand="True"/>
+                    </CollapsibleBody>
+                </Collapsible>
+            </BoxContainer>
+            <BoxContainer Name="CompositionContainer" HorizontalExpand="True">
+                <Collapsible>
+                    <CollapsibleHeading Title="{Loc 'guidebook-food-reagents-header'}"/>
+                    <CollapsibleBody>
+                        <BoxContainer Name="CompositionDescriptionContainer"
+                                      Orientation="Vertical"
+                                      Margin="10 0 10 0"
+                                      HorizontalExpand="True"/>
+                    </CollapsibleBody>
+                </Collapsible>
+            </BoxContainer>
+            <BoxContainer Margin="10 5 10 10" HorizontalExpand="True">
+                <!-- The troublemaker !-->
+                <RichTextLabel Name="FoodDescription" HorizontalAlignment="Left"/>
+            </BoxContainer>
+        </BoxContainer>
+    </PanelContainer>
+</BoxContainer>

Content.Client/Guidebook/Controls/GuideFoodEmbed.xaml.cs

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+using System.Diagnostics.CodeAnalysis;
+using System.Linq;
+using Content.Client.Chemistry.EntitySystems;
+using Content.Client.Guidebook.Richtext;
+using Content.Client.Message;
+using Content.Client.Nutrition.EntitySystems;
+using Content.Shared.Chemistry.Reagent;
+using Content.Shared.FixedPoint;
+using JetBrains.Annotations;
+using Robust.Client.AutoGenerated;
+using Robust.Client.Graphics;
+using Robust.Client.UserInterface;
+using Robust.Client.UserInterface.Controls;
+using Robust.Client.UserInterface.XAML;
+using Robust.Shared.Prototypes;
+using Robust.Shared.Utility;
+
+namespace Content.Client.Guidebook.Controls;
+
+/// <summary>
+///     Control for embedding a food recipe into a guidebook.
+/// </summary>
+[UsedImplicitly, GenerateTypedNameReferences]
+public sealed partial class GuideFoodEmbed : BoxContainer, IDocumentTag, ISearchableControl
+{
+    [Dependency] private readonly IEntitySystemManager _systemManager = default!;
+    [Dependency] private readonly IPrototypeManager _prototype = default!;
+
+    private readonly FoodGuideDataSystem _foodGuideData;
+    private readonly ISawmill _logger = default!;
+
+    public GuideFoodEmbed()
+    {
+        RobustXamlLoader.Load(this);
+        IoCManager.InjectDependencies(this);
+        _foodGuideData = _systemManager.GetEntitySystem<FoodGuideDataSystem>();
+        _logger = Logger.GetSawmill("food guide");
+        MouseFilter = MouseFilterMode.Stop;
+    }
+
+    public GuideFoodEmbed(FoodGuideEntry entry) : this()
+    {
+        GenerateControl(entry);
+    }
+
+    public bool CheckMatchesSearch(string query)
+    {
+        return FoodName.GetMessage()?.Contains(query, StringComparison.InvariantCultureIgnoreCase) == true
+               || FoodDescription.GetMessage()?.Contains(query, StringComparison.InvariantCultureIgnoreCase) == true;
+    }
+
+    public void SetHiddenState(bool state, string query)
+    {
+        Visible = CheckMatchesSearch(query) ? state : !state;
+    }
+
+    public bool TryParseTag(Dictionary<string, string> args, [NotNullWhen(true)] out Control? control)
+    {
+        control = null;
+        if (!args.TryGetValue("Food", out var id))
+        {
+            _logger.Error("Food embed tag is missing food prototype argument.");
+            return false;
+        }
+
+        if (!_foodGuideData.TryGetData(id, out var data))
+        {
+            _logger.Warning($"Specified food prototype \"{id}\" does not have any known sources.");
+            return false;
+        }
+
+        GenerateControl(data);
+
+        control = this;
+        return true;
+    }
+
+    private void GenerateControl(FoodGuideEntry data)
+    {
+        _prototype.TryIndex(data.Result, out var proto);
+        if (proto == null)
+        {
+            FoodName.SetMarkup(Loc.GetString("guidebook-food-unknown-proto", ("id", data.Result)));
+            return;
+        }
+
+        var composition = data.Composition
+            .Select(it => _prototype.TryIndex<ReagentPrototype>(it.Reagent.Prototype, out var reagent) ? (reagent, it.Quantity) : (null, 0))
+            .Where(it => it.reagent is not null)
+            .Cast<(ReagentPrototype, FixedPoint2)>()
+            .ToList();
+
+        #region Colors
+
+        CalculateColors(composition, out var textColor, out var backgroundColor);
+
+        NameBackground.PanelOverride = new StyleBoxFlat
+        {
+            BackgroundColor = backgroundColor
+        };
+        FoodName.SetMarkup(Loc.GetString("guidebook-food-name", ("color", textColor), ("name", proto.Name)));
+
+        #endregion
+
+        #region Sources
+
+        foreach (var source in data.Sources.OrderBy(it => it.OutputCount))
+        {
+            var control = new GuideFoodSource(proto, source, _prototype);
+            SourcesDescriptionContainer.AddChild(control);
+        }
+
+        #endregion
+
+        #region Composition
+
+        foreach (var (reagent, quantity) in composition)
+        {
+            var control = new GuideFoodComposition(reagent, quantity);
+            CompositionDescriptionContainer.AddChild(control);
+        }
+
+        #endregion
+
+        FormattedMessage description = new();
+        description.AddText(proto?.Description ?? string.Empty);
+        // Cannot describe food flavor or smth beause food is entirely server-side
+
+        FoodDescription.SetMessage(description);
+    }
+
+    private void CalculateColors(List<(ReagentPrototype, FixedPoint2)> composition, out Color text, out Color background)
+    {
+        // Background color is calculated as the weighted average of the colors of the composition.
+        // Text color is determined based on background luminosity.
+        float r = 0, g = 0, b = 0;
+        FixedPoint2 weight = 0;
+
+        foreach (var (proto, quantity) in composition)
+        {
+            var tcolor = proto.SubstanceColor;
+            var prevalence =
+                quantity <= 0 ? 0f
+                : weight == 0f ? 1f
+                : (quantity / (weight + quantity)).Float();
+
+            r = r * (1 - prevalence) + tcolor.R * prevalence;
+            g = g * (1 - prevalence) + tcolor.G * prevalence;
+            b = b * (1 - prevalence) + tcolor.B * prevalence;
+
+            if (quantity > 0)
+                weight += quantity;
+        }
+
+        // Copied from GuideReagentEmbed which was probably copied from stackoverflow. This is the formula for color luminosity.
+        var lum = 0.2126f * r + 0.7152f * g + 0.0722f;
+
+        background = new Color(r, g, b);
+        text = lum > 0.5f ? Color.Black : Color.White;
+    }
+}

Content.Client/Guidebook/Controls/GuideFoodGroupEmbed.xaml

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+<BoxContainer xmlns="https://spacestation14.io"
+              Orientation="Vertical">
+    <BoxContainer Name="GroupContainer" Orientation="Vertical"/>
+</BoxContainer>

Content.Client/Guidebook/Controls/GuideFoodGroupEmbed.xaml.cs

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+using System.Diagnostics.CodeAnalysis;
+using System.Linq;
+using Content.Client.Guidebook.Richtext;
+using Content.Client.Nutrition.EntitySystems;
+using JetBrains.Annotations;
+using Robust.Client.AutoGenerated;
+using Robust.Client.UserInterface;
+using Robust.Client.UserInterface.Controls;
+using Robust.Client.UserInterface.XAML;
+using Robust.Shared.Prototypes;
+
+namespace Content.Client.Guidebook.Controls;
+
+[UsedImplicitly, GenerateTypedNameReferences]
+public sealed partial class GuideFoodGroupEmbed : BoxContainer, IDocumentTag
+{
+    [Dependency] private readonly IEntitySystemManager _sysMan = default!;
+    [Dependency] private readonly IPrototypeManager _prototype = default!;
+
+    public GuideFoodGroupEmbed()
+    {
+        RobustXamlLoader.Load(this);
+        IoCManager.InjectDependencies(this);
+        MouseFilter = MouseFilterMode.Stop;
+
+        foreach (var data in _sysMan.GetEntitySystem<FoodGuideDataSystem>().Registry.OrderBy(it => it.Identifier))
+        {
+            var embed = new GuideFoodEmbed(data);
+            GroupContainer.AddChild(embed);
+        }
+    }
+
+    public bool TryParseTag(Dictionary<string, string> args, [NotNullWhen(true)] out Control? control)
+    {
+        control = this;
+        return true;
+    }
+}

Content.Client/Guidebook/Controls/GuideFoodSource.xaml

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+<BoxContainer xmlns="https://spacestation14.io"
+              Orientation="Horizontal"
+              HorizontalAlignment="Stretch"
+              HorizontalExpand="True"
+              Margin="0 0 0 5">
+    <BoxContainer Name="ReactantsContainer" Orientation="Vertical" VerticalAlignment="Center">
+        <TextureRect HorizontalAlignment="Center"
+                     Name="SourceTexture"
+                     Access="Public"/>
+        <!-- Using rich label here because apparently normal labels do not support soft wrap -->
+        <RichTextLabel Name="SourceLabel"
+               HorizontalAlignment="Center"
+               VerticalAlignment="Center"
+               Access="Public"
+               Margin="2 0 0 0"/>
+    </BoxContainer>
+    <BoxContainer Orientation="Vertical" VerticalAlignment="Center" HorizontalAlignment="Center" HorizontalExpand="True">
+        <TextureRect HorizontalAlignment="Center"
+                     Name="ProcessingTexture"
+                     Access="Public"/>
+        <Label Name="ProcessingLabel"
+               HorizontalAlignment="Center"
+               VerticalAlignment="Center"
+               Access="Public"
+               Margin="2 0 0 0"/>
+    </BoxContainer>
+    <BoxContainer Orientation="Vertical" VerticalAlignment="Center">
+        <TextureRect HorizontalAlignment="Center"
+                     Name="OutputsTexture"
+                     Access="Public"/>
+        <Label Name="OutputsLabel"
+               HorizontalAlignment="Center"
+               VerticalAlignment="Center"
+               Access="Public"
+               Margin="2 0 0 0"/>
+    </BoxContainer>
+</BoxContainer>