From d80a9123b741dc7d99cee76cbbb047cfb7d91292 Mon Sep 17 00:00:00 2001
From: ocornut <omarcornut@gmail.com>
Date: Wed, 10 Nov 2021 20:17:11 +0100
Subject: [PATCH] Internals: move chunks of IsItemHovered() so upcoming commit
 can be less noisy. This commit should be a no-op (check by comparing without
 white-space changes)

---
 imgui.cpp | 62 +++++++++++++++++++++++++++++--------------------------
 1 file changed, 33 insertions(+), 29 deletions(-)

diff --git a/imgui.cpp b/imgui.cpp
index ef1d2554..d92f3f4d 100644
--- a/imgui.cpp
+++ b/imgui.cpp
@@ -3278,42 +3278,46 @@ bool ImGui::IsItemHovered(ImGuiHoveredFlags flags)
     {
         if ((g.LastItemData.InFlags & ImGuiItemFlags_Disabled) && !(flags & ImGuiHoveredFlags_AllowWhenDisabled))
             return false;
-        return IsItemFocused();
+        if (!IsItemFocused())
+            return false;
     }
-
-    // Test for bounding box overlap, as updated as ItemAdd()
-    ImGuiItemStatusFlags status_flags = g.LastItemData.StatusFlags;
-    if (!(status_flags & ImGuiItemStatusFlags_HoveredRect))
-        return false;
-    IM_ASSERT((flags & (ImGuiHoveredFlags_AnyWindow | ImGuiHoveredFlags_RootWindow | ImGuiHoveredFlags_ChildWindows | ImGuiHoveredFlags_NoPopupHierarchy)) == 0);   // Flags not supported by this function
-
-    // Test if we are hovering the right window (our window could be behind another window)
-    // [2021/03/02] Reworked / reverted the revert, finally. Note we want e.g. BeginGroup/ItemAdd/EndGroup to work as well. (#3851)
-    // [2017/10/16] Reverted commit 344d48be3 and testing RootWindow instead. I believe it is correct to NOT test for RootWindow but this leaves us unable
-    // to use IsItemHovered() after EndChild() itself. Until a solution is found I believe reverting to the test from 2017/09/27 is safe since this was
-    // the test that has been running for a long while.
-    if (g.HoveredWindow != window && (status_flags & ImGuiItemStatusFlags_HoveredWindow) == 0)
-        if ((flags & ImGuiHoveredFlags_AllowWhenOverlapped) == 0)
+    else
+    {
+        // Test for bounding box overlap, as updated as ItemAdd()
+        ImGuiItemStatusFlags status_flags = g.LastItemData.StatusFlags;
+        if (!(status_flags & ImGuiItemStatusFlags_HoveredRect))
             return false;
+        IM_ASSERT((flags & (ImGuiHoveredFlags_AnyWindow | ImGuiHoveredFlags_RootWindow | ImGuiHoveredFlags_ChildWindows | ImGuiHoveredFlags_NoPopupHierarchy)) == 0);   // Flags not supported by this function
+
+        // Test if we are hovering the right window (our window could be behind another window)
+        // [2021/03/02] Reworked / reverted the revert, finally. Note we want e.g. BeginGroup/ItemAdd/EndGroup to work as well. (#3851)
+        // [2017/10/16] Reverted commit 344d48be3 and testing RootWindow instead. I believe it is correct to NOT test for RootWindow but this leaves us unable
+        // to use IsItemHovered() after EndChild() itself. Until a solution is found I believe reverting to the test from 2017/09/27 is safe since this was
+        // the test that has been running for a long while.
+        if (g.HoveredWindow != window && (status_flags & ImGuiItemStatusFlags_HoveredWindow) == 0)
+            if ((flags & ImGuiHoveredFlags_AllowWhenOverlapped) == 0)
+                return false;
+
+        // Test if another item is active (e.g. being dragged)
+        if ((flags & ImGuiHoveredFlags_AllowWhenBlockedByActiveItem) == 0)
+            if (g.ActiveId != 0 && g.ActiveId != g.LastItemData.ID && !g.ActiveIdAllowOverlap && g.ActiveId != window->MoveId)
+                return false;
 
-    // Test if another item is active (e.g. being dragged)
-    if ((flags & ImGuiHoveredFlags_AllowWhenBlockedByActiveItem) == 0)
-        if (g.ActiveId != 0 && g.ActiveId != g.LastItemData.ID && !g.ActiveIdAllowOverlap && g.ActiveId != window->MoveId)
+        // Test if interactions on this window are blocked by an active popup or modal.
+        // The ImGuiHoveredFlags_AllowWhenBlockedByPopup flag will be tested here.
+        if (!IsWindowContentHoverable(window, flags))
             return false;
 
-    // Test if interactions on this window are blocked by an active popup or modal.
-    // The ImGuiHoveredFlags_AllowWhenBlockedByPopup flag will be tested here.
-    if (!IsWindowContentHoverable(window, flags))
-        return false;
+        // Test if the item is disabled
+        if ((g.LastItemData.InFlags & ImGuiItemFlags_Disabled) && !(flags & ImGuiHoveredFlags_AllowWhenDisabled))
+            return false;
 
-    // Test if the item is disabled
-    if ((g.LastItemData.InFlags & ImGuiItemFlags_Disabled) && !(flags & ImGuiHoveredFlags_AllowWhenDisabled))
-        return false;
+        // Special handling for calling after Begin() which represent the title bar or tab.
+        // When the window is collapsed (SkipItems==true) that last item will never be overwritten so we need to detect the case.
+        if (g.LastItemData.ID == window->MoveId && window->WriteAccessed)
+            return false;
+    }
 
-    // Special handling for calling after Begin() which represent the title bar or tab.
-    // When the window is collapsed (SkipItems==true) that last item will never be overwritten so we need to detect the case.
-    if (g.LastItemData.ID == window->MoveId && window->WriteAccessed)
-        return false;
     return true;
 }