InputText: Fixed slightly off ScrollX tracking, noticeable with large values of FramePadding.x. Multiline: Fixed padding/cliprect not matching single-line version. (#3781)

Fixed FramePadding.y worth of vertical offset when aiming with mouse.

docs/CHANGELOG.txt

@@ -51,6 +51,9 @@ Other Changes:
 - SliderInt: Fixed click/drag when v_min==v_max from setting the value to zero. (#3774) [@erwincoumans]
   Would also repro with DragFloat() when using ImGuiSliderFlags_Logarithmic with v_min==v_max.
 - Menus: Fixed an issue with child-menu auto sizing (issue introduced in 1.80 on 2021/01/25) (#3779)
+- InputText: Fixed slightly off ScrollX tracking, noticeable with large values of FramePadding.x. (#3781)
+- InputText: Multiline: Fixed padding/cliprect not precisely matching single-line version. (#3781)
+- InputText: Multiline: Fixed FramePadding.y worth of vertical offset when aiming with mouse.
 - Fonts: imgui_freetype: Facilitated using FreeType integration: [@Xipiryon, @ocornut]
   - Use '#define IMGUI_ENABLE_FREETYPE' in imconfig.h should make it work with no other modifications
     other than compiling misc/freetype/imgui_freetype.cpp and linking with FreeType.

imgui_widgets.cpp

@@ -3868,9 +3868,8 @@ bool ImGui::InputTextEx(const char* label, const char* hint, char* buf, int buf_
         PushStyleColor(ImGuiCol_ChildBg, style.Colors[ImGuiCol_FrameBg]);
         PushStyleVar(ImGuiStyleVar_ChildRounding, style.FrameRounding);
         PushStyleVar(ImGuiStyleVar_ChildBorderSize, style.FrameBorderSize);
-        PushStyleVar(ImGuiStyleVar_WindowPadding, style.FramePadding);
+        bool child_visible = BeginChildEx(label, id, frame_bb.GetSize(), true, ImGuiWindowFlags_NoMove);
-        bool child_visible = BeginChildEx(label, id, frame_bb.GetSize(), true, ImGuiWindowFlags_NoMove | ImGuiWindowFlags_AlwaysUseWindowPadding);
+        PopStyleVar(2);
-        PopStyleVar(3);
         PopStyleColor();
         if (!child_visible)
         {
@@ -3880,6 +3879,7 @@ bool ImGui::InputTextEx(const char* label, const char* hint, char* buf, int buf_
         }
         draw_window = g.CurrentWindow; // Child window
         draw_window->DC.NavLayerActiveMaskNext |= (1 << draw_window->DC.NavLayerCurrent); // This is to ensure that EndChild() will display a navigation highlight so we can "enter" into it.
+        draw_window->DC.CursorPos += style.FramePadding;
         inner_size.x -= draw_window->ScrollbarSizes.x;
     }
     else
@@ -4040,7 +4040,7 @@ bool ImGui::InputTextEx(const char* label, const char* hint, char* buf, int buf_
 
         // Edit in progress
         const float mouse_x = (io.MousePos.x - frame_bb.Min.x - style.FramePadding.x) + state->ScrollX;
-        const float mouse_y = (is_multiline ? (io.MousePos.y - draw_window->DC.CursorPos.y - style.FramePadding.y) : (g.FontSize * 0.5f));
+        const float mouse_y = (is_multiline ? (io.MousePos.y - draw_window->DC.CursorPos.y) : (g.FontSize * 0.5f));
 
         const bool is_osx = io.ConfigMacOSXBehaviors;
         if (select_all || (hovered && !is_osx && io.MouseDoubleClicked[0]))
@@ -4489,10 +4489,11 @@ bool ImGui::InputTextEx(const char* label, const char* hint, char* buf, int buf_
             if (!(flags & ImGuiInputTextFlags_NoHorizontalScroll))
             {
                 const float scroll_increment_x = inner_size.x * 0.25f;
+                const float visible_width = inner_size.x - style.FramePadding.x;
                 if (cursor_offset.x < state->ScrollX)
                     state->ScrollX = IM_FLOOR(ImMax(0.0f, cursor_offset.x - scroll_increment_x));
-                else if (cursor_offset.x - inner_size.x >= state->ScrollX)
+                else if (cursor_offset.x - visible_width >= state->ScrollX)
-                    state->ScrollX = IM_FLOOR(cursor_offset.x - inner_size.x + scroll_increment_x);
+                    state->ScrollX = IM_FLOOR(cursor_offset.x - visible_width + scroll_increment_x);
             }
             else
             {
@@ -4597,7 +4598,7 @@ bool ImGui::InputTextEx(const char* label, const char* hint, char* buf, int buf_
 
     if (is_multiline)
     {
-        Dummy(text_size);
+        Dummy(ImVec2(text_size.x, text_size.y + style.FramePadding.y));
         EndChild();
         EndGroup();
     }