From 1c1fd5d6d5b4a639568c2f29401033436cc2573d Mon Sep 17 00:00:00 2001
From: Anna <git@anna.lgbt>
Date: Tue, 15 Feb 2022 18:36:16 -0500
Subject: [PATCH] feat: add jank hover highlight for links

---
 ChatTwo/Ui/ChatLog.cs      |  4 ++--
 ChatTwo/Util/ColourUtil.cs |  9 +++++++++
 ChatTwo/Util/ImGuiUtil.cs  | 35 ++++++++++++++++++++++++++++++++++-
 3 files changed, 45 insertions(+), 3 deletions(-)

diff --git a/ChatTwo/Ui/ChatLog.cs b/ChatTwo/Ui/ChatLog.cs
index 980d22c..6270872 100755
--- a/ChatTwo/Ui/ChatLog.cs
+++ b/ChatTwo/Ui/ChatLog.cs
@@ -164,7 +164,7 @@ internal sealed class ChatLog : IUiComponent {
         if (parts.Length < 2 || parts[0] != "chat") {
             return;
         }
-        
+
         switch (parts[1]) {
             case "hide":
                 this._hideState = HideState.User;
@@ -988,7 +988,7 @@ internal sealed class ChatLog : IUiComponent {
         }
 
         if (wrap) {
-            ImGuiUtil.WrapText(content, chunk, handler);
+            ImGuiUtil.WrapText(content, chunk, handler, this.Ui.DefaultText);
         } else {
             ImGui.TextUnformatted(content);
             ImGuiUtil.PostPayload(chunk, handler);
diff --git a/ChatTwo/Util/ColourUtil.cs b/ChatTwo/Util/ColourUtil.cs
index e524ffa..0887e4c 100755
--- a/ChatTwo/Util/ColourUtil.cs
+++ b/ChatTwo/Util/ColourUtil.cs
@@ -29,6 +29,15 @@ internal static class ColourUtil {
         );
     }
 
+    internal static uint Vector4ToAbgr(Vector4 col) {
+        return RgbaToAbgr(ComponentsToRgba(
+            (byte) Math.Round(col.X * 255),
+            (byte) Math.Round(col.Y * 255),
+            (byte) Math.Round(col.Z * 255),
+            (byte) Math.Round(col.W * 255)
+        ));
+    }
+
     internal static uint ComponentsToRgba(byte red, byte green, byte blue, byte alpha = 0xFF) => alpha
                                                                                                  | (uint) (red << 24)
                                                                                                  | (uint) (green << 16)
diff --git a/ChatTwo/Util/ImGuiUtil.cs b/ChatTwo/Util/ImGuiUtil.cs
index 18a3cd9..7638740 100755
--- a/ChatTwo/Util/ImGuiUtil.cs
+++ b/ChatTwo/Util/ImGuiUtil.cs
@@ -1,4 +1,6 @@
+using System.Numerics;
 using System.Text;
+using Dalamud.Game.Text.SeStringHandling;
 using Dalamud.Interface;
 using Dalamud.Interface.Style;
 using ImGuiNET;
@@ -12,11 +14,18 @@ internal static class ImGuiUtil {
         ImGuiMouseButton.Right,
     };
 
+    private static Payload? _hovered;
+    private static Payload? _lastLink;
+    private static readonly List<(Vector2, Vector2)> _payloadBounds = new();
+
     internal static void PostPayload(Chunk chunk, PayloadHandler? handler) {
         var payload = chunk.Link;
         if (payload != null && ImGui.IsItemHovered()) {
+            _hovered = payload;
             ImGui.SetMouseCursor(ImGuiMouseCursor.Hand);
             handler?.Hover(payload);
+        } else if (!ReferenceEquals(_hovered, payload)) {
+            _hovered = null;
         }
 
         if (handler == null) {
@@ -30,10 +39,34 @@ internal static class ImGuiUtil {
         }
     }
 
-    internal static unsafe void WrapText(string csText, Chunk chunk, PayloadHandler? handler) {
+    internal static unsafe void WrapText(string csText, Chunk chunk, PayloadHandler? handler, Vector4 defaultText) {
         void Text(byte* text, byte* textEnd) {
+            var oldPos = ImGui.GetCursorScreenPos();
+
             ImGuiNative.igTextUnformatted(text, textEnd);
             PostPayload(chunk, handler);
+
+            if (!ReferenceEquals(_lastLink, chunk.Link)) {
+                _payloadBounds.Clear();
+            }
+
+            _lastLink = chunk.Link;
+
+            if (_hovered != null && ReferenceEquals(_hovered, chunk.Link)) {
+                defaultText.W = 0.25f;
+                var actualCol = ColourUtil.Vector4ToAbgr(defaultText);
+                ImGui.GetWindowDrawList().AddRectFilled(oldPos, oldPos + ImGui.GetItemRectSize(), actualCol);
+
+                foreach (var (start, size) in _payloadBounds) {
+                    ImGui.GetWindowDrawList().AddRectFilled(start, start + size, actualCol);
+                }
+
+                _payloadBounds.Clear();
+            }
+
+            if (_hovered == null && chunk.Link != null) {
+                _payloadBounds.Add((oldPos, ImGui.GetItemRectSize()));
+            }
         }
 
         if (csText.Length == 0) {