文件操作 - EnableExtendedFlags.txt

文件: /root/node_modules/node-pty/deps/winpty/misc/EnableExtendedFlags.txt

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Note regarding ENABLE_EXTENDED_FLAGS (2016-05-30)

There is a complicated interaction between the ENABLE_EXTENDED_FLAGS flag
and the ENABLE_QUICK_EDIT_MODE and ENABLE_INSERT_MODE flags (presumably for
backwards compatibility?).  I studied the behavior on Windows 7 and Windows
10, with both the old and new consoles, and I didn't see any differences
between versions.  Here's what I seemed to observe:

- The console has three flags internally:
    - QuickEdit
    - InsertMode
    - ExtendedFlags

- SetConsoleMode psuedocode:
      void SetConsoleMode(..., DWORD mode) {
        ExtendedFlags = (mode & (ENABLE_EXTENDED_FLAGS
                                  | ENABLE_QUICK_EDIT_MODE
                                  | ENABLE_INSERT_MODE    )) != 0;
        if (ExtendedFlags) {
          QuickEdit = (mode & ENABLE_QUICK_EDIT_MODE) != 0;
          InsertMode = (mode & ENABLE_INSERT_MODE) != 0;
        }
      }

- Setting QuickEdit or InsertMode from the properties dialog GUI does not
   affect the ExtendedFlags setting -- it simply toggles the one flag.

- GetConsoleMode psuedocode:
      GetConsoleMode(..., DWORD *result) {
        if (ExtendedFlags) {
          *result |= ENABLE_EXTENDED_FLAGS;
          if (QuickEdit) { *result |= ENABLE_QUICK_EDIT_MODE; }
          if (InsertMode) { *result |= ENABLE_INSERT_MODE; }
        }
      }

Effectively, the ExtendedFlags flags controls whether the other two flags
are visible/controlled by the user application.  If they aren't visible,
though, there is no way for the user application to make them visible,
except by overwriting their values!  Calling SetConsoleMode with just
ENABLE_EXTENDED_FLAGS would clear the extended flags we want to read.

Consequently, if a program temporarily alters the QuickEdit flag (e.g. to
enable mouse input), it cannot restore the original values of the QuickEdit
and InsertMode flags, UNLESS every other console program cooperates by
keeping the ExtendedFlags flag set.

文件操作 - EnableExtendedFlags.txt

文件: /root/node_modules/node-pty/deps/winpty/misc/EnableExtendedFlags.txt

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