Work around (maybe) wx wrapping issue

wx infobar generic will wrap text, changing the stored label data on
instantiation.  Since we might expand the infobar later, this presents
an issue as the newlines are then baked into the string.

We do two things here: keep a copy of the original string to make sure
that we can reset it on update and do a hard calculation of the minimum
height for the infobar to ensure we are displaying the full text string

Fixes https://gitlab.com/kicad/code/kicad/issues/19799

common/widgets/wx_infobar.cpp

@@ -23,12 +23,13 @@
 #include <widgets/wx_infobar.h>
 #include "wx/artprov.h"
 #include <wx/aui/framemanager.h>
+#include <wx/bmpbuttn.h>
 #include <wx/debug.h>
+#include <wx/hyperlink.h>
 #include <wx/infobar.h>
 #include <wx/sizer.h>
+#include <wx/stattext.h>
 #include <wx/timer.h>
-#include <wx/hyperlink.h>
-#include <wx/bmpbuttn.h>
 #include <eda_base_frame.h>
 
 #ifdef __WXMSW__
@@ -158,10 +159,10 @@ void WX_INFOBAR::ShowMessage( const wxString& aMessage, int aFlags )
 
     m_updateLock = true;
 
-    wxString msg = aMessage;
-    msg.Trim();
+    m_message = aMessage;
+    m_message.Trim();
 
-    wxInfoBarGeneric::ShowMessage( msg, aFlags );
+    wxInfoBarGeneric::ShowMessage( m_message, aFlags );
 
     if( m_auiManager )
         updateAuiLayout( true );
@@ -228,6 +229,18 @@ void WX_INFOBAR::onThemeChange( wxSysColourChangedEvent& aEvent )
 void WX_INFOBAR::onSize( wxSizeEvent& aEvent )
 {
     int barWidth = GetSize().GetWidth();
+    wxSizer* sizer = GetSizer();
+
+    if( !sizer )
+        return;
+
+    wxSizerItem* text = sizer->GetItem( 1 );
+
+    if( text )
+    {
+        if( auto textCtrl = dynamic_cast<wxStaticText*>( text->GetWindow() ) )
+            textCtrl->SetLabelText( m_message );
+    }
 
     // Calculate the horizontal size: because the infobar is shown on top of the draw canvas
     // it is adjusted to the canvas width.
@@ -239,10 +252,26 @@ void WX_INFOBAR::onSize( wxSizeEvent& aEvent )
     if( frame && frame->GetToolCanvas() )
         parentWidth = frame->GetToolCanvas()->GetSize().GetWidth();
 
-
     if( barWidth != parentWidth )
         SetSize( parentWidth, GetSize().GetHeight() );
 
+    if( text )
+    {
+        if( auto textCtrl = dynamic_cast<wxStaticText*>( text->GetWindow() ) )
+        {
+            // Re-wrap the text (this is done automatically later but we need it now)
+            // And count how many lines we need.  If we have embedded newlines, then
+            // multiply the number of lines by the text min height to find the correct
+            // min height for the control.  The min height of the text control will be the size
+            // of a single line of text.  This assumes that two lines of text are larger
+            // than the height of the icon for the bar.
+            textCtrl->Wrap( text->GetSize().GetWidth() );
+            wxString new_text = textCtrl->GetLabel();
+            int      height = ( new_text.Freq( '\n' ) + 1 ) * text->GetMinSize().GetHeight();
+            SetMinSize( wxSize( GetSize().GetWidth(), height ) );
+        }
+    }
+
     aEvent.Skip();
 }
 
@@ -287,7 +316,9 @@ void WX_INFOBAR::AddButton( wxButton* aButton )
     aButton->SetWindowVariant( wxWINDOW_VARIANT_SMALL );
 #endif // __WXMAC__
 
-    sizer->Add( aButton, wxSizerFlags().Centre().Border( wxRIGHT ) );
+    auto element = sizer->Add( aButton, wxSizerFlags( 0 ).Centre().Border( wxRIGHT ) );
+
+    element->SetFlag( wxSTRETCH_MASK );
 
     if( IsShownOnScreen() )
         sizer->Layout();
@@ -300,7 +331,7 @@ void WX_INFOBAR::AddButton( wxHyperlinkCtrl* aHypertextButton )
 
     wxASSERT( aHypertextButton );
 
-    sizer->Add( aHypertextButton, wxSizerFlags().Centre().Border( wxRIGHT ) );
+    sizer->Add( aHypertextButton, wxSizerFlags().Centre().Border( wxRIGHT ).Shaped() );
 
     if( IsShownOnScreen() )
         sizer->Layout();

include/widgets/wx_infobar.h

@@ -262,6 +262,7 @@ protected:
     wxTimer*      m_showTimer;      ///< The timer counting the autoclose period
     wxAuiManager* m_auiManager;     ///< The AUI manager that contains this infobar
     MESSAGE_TYPE  m_type;           ///< The type of message being displayed
+    wxString      m_message;        ///< The original message without wrapping
 
     std::optional<std::function<void(void)>> m_callback;   ///< Optional callback made when closing infobar