HellionChat/HellionChat/Ui/CommandHelpWindow.cs

using System.Numerics;
using Dalamud.Bindings.ImGui;
using Dalamud.Interface.Utility;
using Dalamud.Interface.Windowing;
using Dalamud.Utility;
using HellionChat.Ui.Components;
using HellionChat.Util;
using Lumina.Text.ReadOnly;
using Microsoft.Extensions.Logging;

namespace HellionChat.Ui;

internal sealed class CommandHelpWindow : Window
{
    private readonly ChunkRenderer _chunkRenderer;
    private readonly Windows.MainWindow _mainWindow;
    private readonly ILogger<CommandHelpWindow> _logger;

    private ReadOnlySeString? _commandDescription;

    internal CommandHelpWindow(
        ChunkRenderer chunkRenderer,
        Windows.MainWindow mainWindow,
        ILogger<CommandHelpWindow> logger
    )
        : base("command help##chat2-commandhelp")
    {
        _chunkRenderer = chunkRenderer;
        _mainWindow = mainWindow;
        _logger = logger;

        Flags =
            ImGuiWindowFlags.NoSavedSettings
            | ImGuiWindowFlags.NoTitleBar
            | ImGuiWindowFlags.NoMove
            | ImGuiWindowFlags.NoResize
            | ImGuiWindowFlags.NoFocusOnAppearing
            | ImGuiWindowFlags.AlwaysAutoResize;

        RespectCloseHotkey = false;
        DisableWindowSounds = true;

        // Logger injected for future diagnostic hooks (no call-sites yet in R2).
        _ = _logger;
    }

    public void UpdateContent(ReadOnlySeString commandDesc)
    {
        _commandDescription = commandDesc;

        var width = 350;
        var scaledWidth = width * ImGuiHelpers.GlobalScale;
        var pos = _mainWindow.LastWindowPos;
        switch (Plugin.Config.CommandHelpSide)
        {
            case CommandHelpSide.Right:
                pos.X += _mainWindow.LastWindowSize.X;
                break;
            case CommandHelpSide.Left:
                pos.X -= scaledWidth;
                break;
            case CommandHelpSide.None:
            default:
                IsOpen = false;
                return;
        }

        Position = pos;
        SizeConstraints = new WindowSizeConstraints
        {
            // scaledWidth keeps size constraints in the same coordinate space as
            // Position so the help window stays correct width at non-100% DPI.
            MinimumSize = new Vector2(scaledWidth, 0),
            MaximumSize = _mainWindow.LastWindowSize with { X = scaledWidth },
        };

        IsOpen = true;
    }

    public override void Draw()
    {
        if (_commandDescription == null)
            return;

        var chunks = ChunkUtil
            .ToChunks(_commandDescription.Value.ToDalamudString(), ChunkSource.None, null)
            .ToList();

        // Command-help chunks are read-only description text — no click-targets.
        _chunkRenderer.DrawChunks(chunks, wrap: true, handler: null, lineWidth: 0f);
    }
}