ccmake: Refactor resizing logic into cmCursesForm

Source/CursesDialog/ccmake.cxx

@@ -9,8 +9,6 @@
 #include <string>
 #include <vector>
 
-#include <unistd.h>
-
 #include "cmsys/Encoding.hxx"
 
 #include "cmCursesColor.h"
@@ -58,22 +56,7 @@ extern "C" {
 static void onsig(int /*unused*/)
 {
   if (cmCursesForm::CurrentForm) {
-    endwin();
-    if (initscr() == nullptr) {
-      static const char errmsg[] = "Error: ncurses initialization failed\n";
-      auto r = write(STDERR_FILENO, errmsg, sizeof(errmsg) - 1);
-      static_cast<void>(r);
-      exit(1);
-    }
-    noecho();             /* Echo off */
-    cbreak();             /* nl- or cr not needed */
-    keypad(stdscr, true); /* Use key symbols as KEY_DOWN */
-    refresh();
-    int x;
-    int y;
-    getmaxyx(stdscr, y, x);
-    cmCursesForm::CurrentForm->Render(1, 1, x, y);
-    cmCursesForm::CurrentForm->UpdateStatusBar();
+    cmCursesForm::CurrentForm->HandleResize();
   }
   signal(SIGWINCH, onsig);
 }

Source/CursesDialog/cmCursesForm.cxx

@@ -2,6 +2,8 @@
    file Copyright.txt or https://cmake.org/licensing for details.  */
 #include "cmCursesForm.h"
 
+#include <unistd.h>
+
 cmsys::ofstream cmCursesForm::DebugFile;
 bool cmCursesForm::Debug = false;
 
@@ -43,3 +45,23 @@ void cmCursesForm::LogMessage(const char* msg)
 
   cmCursesForm::DebugFile << msg << std::endl;
 }
+
+void cmCursesForm::HandleResize()
+{
+  endwin();
+  if (initscr() == nullptr) {
+    static const char errmsg[] = "Error: ncurses initialization failed\n";
+    auto r = write(STDERR_FILENO, errmsg, sizeof(errmsg) - 1);
+    static_cast<void>(r);
+    exit(1);
+  }
+  noecho();             /* Echo off */
+  cbreak();             /* nl- or cr not needed */
+  keypad(stdscr, true); /* Use key symbols as KEY_DOWN */
+  refresh();
+  int x;
+  int y;
+  getmaxyx(stdscr, y, x);
+  this->Render(1, 1, x, y);
+  this->UpdateStatusBar();
+}

Source/CursesDialog/cmCursesForm.h

@@ -55,6 +55,10 @@ public:
 
   static cmCursesForm* CurrentForm;
 
+  // Description:
+  // Handle resizing the form with curses.
+  void HandleResize();
+
 protected:
   static cmsys::ofstream DebugFile;
   static bool Debug;