nsDialogs: the next InstallOptions

git-svn-id: https://svn.code.sf.net/p/nsis/code/NSIS/trunk@5199 212acab6-be3b-0410-9dea-997c60f758d6

Contrib/nsDialogs/input.c

@@ -0,0 +1,77 @@
+#include <windows.h>
+
+#include "input.h"
+#include "defs.h"
+#include "nsis.h"
+
+extern struct nsDialog g_dialog;
+
+static int NSDFUNC ConvertPlacement(char *str, int total, int height)
+{
+  char unit = *CharPrev(str, str + lstrlen(str));
+  int x = myatoi(str);
+
+  if (unit == '%')
+  {
+    if (x < 0)
+    {
+      return MulDiv(total, 100 + x, 100);
+    }
+
+    return MulDiv(total, x, 100);
+  }
+  else if (unit == 'u')
+  {
+    RECT r;
+
+    r.left = r.top = x;
+
+    MapDialogRect(g_dialog.hwParent, &r);
+
+    if (height)
+      return x >= 0 ? r.top : total + r.top;
+    else
+      return x >= 0 ? r.left : total + r.left;
+  }
+
+  if (x < 0)
+  {
+    return total + x;
+  }
+
+  return x;
+}
+
+int NSDFUNC PopPlacement(int *x, int *y, int *width, int *height)
+{
+  RECT dialogRect;
+  int  dialogWidth;
+  int  dialogHeight;
+  char buf[1024];
+
+  GetClientRect(g_dialog.hwDialog, &dialogRect);
+  dialogWidth = dialogRect.right;
+  dialogHeight = dialogRect.bottom;
+
+  if (popstring(buf, 1024))
+    return 1;
+
+  *x = ConvertPlacement(buf, dialogWidth, 0);
+
+  if (popstring(buf, 1024))
+    return 1;
+
+  *y = ConvertPlacement(buf, dialogHeight, 1);
+
+  if (popstring(buf, 1024))
+    return 1;
+
+  *width = ConvertPlacement(buf, dialogWidth, 0);
+
+  if (popstring(buf, 1024))
+    return 1;
+
+  *height = ConvertPlacement(buf, dialogHeight, 1);
+
+  return 0;
+}