Tables: storing WorkMaxX, made offset_x == MinX to be clearer, clip rect merge uses ClipRect.max.x directly, removed unused ShrinkWidth code, metrics.

imgui_internal.h

@@ -1892,7 +1892,7 @@ struct ImGuiTabBar
 #define IMGUI_TABLE_MAX_COLUMNS         64                  // sizeof(ImU64) * 8. This is solely because we frequently encode columns set in a ImU64.
 #define IMGUI_TABLE_MAX_DRAW_CHANNELS   (1 + 2 + 64 * 2)    // See TableUpdateDrawChannels()
 
-// [Internal] sizeof() ~ 96
+// [Internal] sizeof() ~ 100
 // We use the terminology "Visible" to refer to a column that is not Hidden by user or settings. However it may still be out of view and clipped (see IsClipped).
 struct ImGuiTableColumn
 {
@@ -1908,6 +1908,7 @@ struct ImGuiTableColumn
     float                   WidthRequest;                   // Master width absolute value when !(Flags & _WidthStretch). When Stretch this is derived every frame from StretchWeight in TableUpdateLayout()
     float                   WidthGiven;                     // Final/actual width visible == (MaxX - MinX), locked in TableUpdateLayout(). May be > WidthRequest to honor minimum width, may be < WidthRequest to honor shrinking columns down in tight space.
     float                   WorkMinX;                       // Start position for the frame, currently ~(MinX + CellPaddingX)
+    float                   WorkMaxX;
     float                   ContentMaxXFrozen;              // Contents maximum position for frozen rows (apart from headers), from which we can infer content width.
     float                   ContentMaxXUnfrozen;
     float                   ContentMaxXHeadersUsed;         // Contents maximum position for headers rows (regardless of freezing). TableHeader() automatically softclip itself + report ideal desired size, to avoid creating extraneous draw calls