From 3f63700e993367c45548c995f6bf0fb30d02d737 Mon Sep 17 00:00:00 2001
From: Alexei Kotov <alexdobrohotov@yandex.ru>
Date: Sun, 9 Mar 2025 19:20:24 +0300
Subject: [PATCH] Improve topic and magic effect list padding accuracy

This also touches the quest list, but there are bigger problems with the journal than just padding
---
 apps/openmw/mwgui/dialogue.cpp |  5 ++++-
 components/widgets/list.cpp    | 29 ++++++++++++++++-------------
 components/widgets/list.hpp    | 15 +++++++++++++--
 3 files changed, 33 insertions(+), 16 deletions(-)

diff --git a/apps/openmw/mwgui/dialogue.cpp b/apps/openmw/mwgui/dialogue.cpp
index e14c400978..6b1e007770 100644
--- a/apps/openmw/mwgui/dialogue.cpp
+++ b/apps/openmw/mwgui/dialogue.cpp
@@ -588,10 +588,13 @@ namespace MWGui
         if (mTopicsList->getItemCount() > 0)
             mTopicsList->addSeparator();
 
+        // Morrowind uses 3 px invisible borders for padding topics
+        constexpr int verticalPadding = 3;
+
         for (const auto& keyword : mKeywords)
         {
             std::string topicId = Misc::StringUtils::lowerCase(keyword);
-            mTopicsList->addItem(keyword);
+            mTopicsList->addItem(keyword, verticalPadding);
 
             auto t = std::make_unique<Topic>(keyword);
             mKeywordSearch.seed(topicId, intptr_t(t.get()));
diff --git a/components/widgets/list.cpp b/components/widgets/list.cpp
index 896057443c..416590ed48 100644
--- a/components/widgets/list.cpp
+++ b/components/widgets/list.cpp
@@ -29,14 +29,14 @@ namespace Gui
                 MyGUI::Align::Top | MyGUI::Align::Left | MyGUI::Align::Stretch, getName() + "_ScrollView");
     }
 
-    void MWList::addItem(std::string_view name)
+    void MWList::addItem(std::string_view name, int verticalPadding)
     {
-        mItems.emplace_back(name);
+        mItems.emplace_back(name, verticalPadding);
     }
 
     void MWList::addSeparator()
     {
-        mItems.emplace_back(std::string{});
+        addItem({});
     }
 
     void MWList::adjustSize()
@@ -48,7 +48,6 @@ namespace Gui
     {
         constexpr int _scrollBarWidth = 20; // fetch this from skin?
         const int scrollBarWidth = scrollbarShown ? _scrollBarWidth : 0;
-        constexpr int spacing = 3;
         int viewPosition = -mScrollView->getViewOffset().top;
 
         while (mScrollView->getChildCount())
@@ -60,25 +59,27 @@ namespace Gui
         int i = 0;
         for (const auto& item : mItems)
         {
-            if (!item.empty())
+            mItemHeight += item.mVPadding;
+            if (!item.mName.empty())
             {
                 if (mListItemSkin.empty())
                     return;
                 MyGUI::Button* button = mScrollView->createWidget<MyGUI::Button>(mListItemSkin,
                     MyGUI::IntCoord(0, mItemHeight, mScrollView->getSize().width - scrollBarWidth - 2, 24),
-                    MyGUI::Align::Left | MyGUI::Align::Top, getName() + "_item_" + item);
-                button->setCaption(item);
+                    MyGUI::Align::Left | MyGUI::Align::Top, getName() + "_item_" + item.mName);
+                button->setCaption(item.mName);
                 button->getSubWidgetText()->setWordWrap(true);
                 button->getSubWidgetText()->setTextAlign(MyGUI::Align::Left);
                 button->eventMouseWheel += MyGUI::newDelegate(this, &MWList::onMouseWheelMoved);
                 button->eventMouseButtonClick += MyGUI::newDelegate(this, &MWList::onItemSelected);
                 button->setNeedKeyFocus(true);
 
-                int height = button->getTextSize().height;
+                // Morrowind list item text widgets are typically 18 pixels tall
+                int height = button->getTextSize().height + 2;
                 button->setSize(MyGUI::IntSize(button->getSize().width, height));
                 button->setUserData(i);
 
-                mItemHeight += height + spacing;
+                mItemHeight += height;
             }
             else
             {
@@ -87,8 +88,9 @@ namespace Gui
                     MyGUI::Align::Left | MyGUI::Align::Top | MyGUI::Align::HStretch);
                 separator->setNeedMouseFocus(false);
 
-                mItemHeight += 18 + spacing;
+                mItemHeight += 18;
             }
+            mItemHeight += item.mVPadding;
             ++i;
         }
 
@@ -123,18 +125,19 @@ namespace Gui
     const std::string& MWList::getItemNameAt(size_t at)
     {
         assert(at < mItems.size() && "List item out of bounds");
-        return mItems[at];
+        return mItems[at].mName;
     }
 
     void MWList::sort()
     {
         // A special case for separators is not needed for now
-        std::sort(mItems.begin(), mItems.end(), Misc::StringUtils::ciLess);
+        std::sort(mItems.begin(), mItems.end(),
+            [](const auto& left, const auto& right) { return Misc::StringUtils::ciLess(left.mName, right.mName); });
     }
 
     void MWList::removeItem(const std::string& name)
     {
-        auto it = std::find(mItems.begin(), mItems.end(), name);
+        auto it = std::find_if(mItems.begin(), mItems.end(), [&name](const auto& item) { return item.mName == name; });
         assert(it != mItems.end());
         mItems.erase(it);
     }
diff --git a/components/widgets/list.hpp b/components/widgets/list.hpp
index 3d5e320cf7..f67a7da97b 100644
--- a/components/widgets/list.hpp
+++ b/components/widgets/list.hpp
@@ -36,7 +36,7 @@ namespace Gui
         void adjustSize();
 
         void sort();
-        void addItem(std::string_view name);
+        void addItem(std::string_view name, int verticalPadding = 0);
         void addSeparator(); ///< add a seperator between the current and the next item.
         void removeItem(const std::string& name);
         size_t getItemCount();
@@ -64,7 +64,18 @@ namespace Gui
         MyGUI::Widget* mClient;
         std::string mListItemSkin;
 
-        std::vector<std::string> mItems;
+        struct ListItemData
+        {
+            std::string mName;
+            int mVPadding;
+
+            ListItemData(std::string_view name, int verticalPadding)
+                : mName(name)
+                , mVPadding(verticalPadding)
+            {
+            }
+        };
+        std::vector<ListItemData> mItems;
 
         int mItemHeight; // height of all items
     };