From 819bac260661159fb0423eaf549cddc567ef2b8c Mon Sep 17 00:00:00 2001

From: Laszlo Ersek <lersek@redhat.com>

Date: Tue, 25 Feb 2014 22:40:01 +0100

Subject: [PATCH] MdeModulePkg: TerminalDxe: set xterm resolution on mode

 change (RH only)

The

  CSI Ps ; Ps ; Ps t

escape sequence serves for window manipulation. We can use the

  CSI 8 ; <rows> ; <columns> t

sequence to adapt eg. the xterm window size to the selected console mode.

Notes about the 20160608b-988715a -> 20170228-c325e41585e3 rebase:

- refresh commit 519b9751573e against various context changes

Notes about the 20170228-c325e41585e3 -> 20171011-92d07e48907f rebase:

- Refresh downstream-only commit 2909e025db68 against "MdeModulePkg.dec"

  context change from upstream commits e043f7895b83 ("MdeModulePkg: Add

  PCD PcdPteMemoryEncryptionAddressOrMask", 2017-02-27) and 76081dfcc5b2

  ("MdeModulePkg: Add PROMPT&HELP string of pcd to UNI file", 2017-03-03).

Reference: <http://rtfm.etla.org/xterm/ctlseq.html>

Contributed-under: TianoCore Contribution Agreement 1.0

Signed-off-by: Laszlo Ersek <lersek@redhat.com>

(cherry picked from commit 2909e025db6878723b49644a8a0cf160d07e6444)

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

---

 MdeModulePkg/MdeModulePkg.dec                 |  4 +++

 .../Console/TerminalDxe/TerminalConOut.c      | 30 +++++++++++++++++++

 .../Console/TerminalDxe/TerminalDxe.inf       |  2 ++

 3 files changed, 36 insertions(+)

diff --git a/MdeModulePkg/MdeModulePkg.dec b/MdeModulePkg/MdeModulePkg.dec

index 91a3c60823..0929560b65 100644

--- a/MdeModulePkg/MdeModulePkg.dec

+++ b/MdeModulePkg/MdeModulePkg.dec

@@ -2021,6 +2021,10 @@

   # @Prompt TCG Platform Firmware Profile revision.

   gEfiMdeModulePkgTokenSpaceGuid.PcdTcgPfpMeasurementRevision|0|UINT32|0x00010077

+  ## Controls whether TerminalDxe outputs an XTerm resize sequence on terminal

+  #  mode change.

+  gEfiMdeModulePkgTokenSpaceGuid.PcdResizeXterm|FALSE|BOOLEAN|0x00010080

+

 [PcdsPatchableInModule]

   ## Specify memory size with page number for PEI code when

   #  Loading Module at Fixed Address feature is enabled.

diff --git a/MdeModulePkg/Universal/Console/TerminalDxe/TerminalConOut.c b/MdeModulePkg/Universal/Console/TerminalDxe/TerminalConOut.c

index aae470e956..26156857aa 100644

--- a/MdeModulePkg/Universal/Console/TerminalDxe/TerminalConOut.c

+++ b/MdeModulePkg/Universal/Console/TerminalDxe/TerminalConOut.c

@@ -7,6 +7,8 @@ SPDX-License-Identifier: BSD-2-Clause-Patent

 **/

+#include <Library/PrintLib.h>

+

 #include "Terminal.h"

 //

@@ -80,6 +82,16 @@ CHAR16 mSetCursorPositionString[]  = { ESC, '[', '0', '0', ';', '0', '0', 'H', 0

 CHAR16 mCursorForwardString[]      = { ESC, '[', '0', '0', 'C', 0 };

 CHAR16 mCursorBackwardString[]     = { ESC, '[', '0', '0', 'D', 0 };

+//

+// Note that this is an ASCII format string, taking two INT32 arguments:

+// rows, columns.

+//

+// A %d (INT32) format specification can expand to at most 11 characters.

+//

+CHAR8 mResizeTextAreaFormatString[] = "\x1B[8;%d;%dt";

+#define RESIZE_SEQ_SIZE (sizeof mResizeTextAreaFormatString + 2 * (11 - 2))

+

+

 //

 // Body of the ConOut functions

 //

@@ -506,6 +518,24 @@ TerminalConOutSetMode (

     return EFI_DEVICE_ERROR;

   }

+  if (PcdGetBool (PcdResizeXterm)) {

+    CHAR16 ResizeSequence[RESIZE_SEQ_SIZE];

+

+    UnicodeSPrintAsciiFormat (

+      ResizeSequence,

+      sizeof ResizeSequence,

+      mResizeTextAreaFormatString,

+      (INT32) TerminalDevice->TerminalConsoleModeData[ModeNumber].Rows,

+      (INT32) TerminalDevice->TerminalConsoleModeData[ModeNumber].Columns

+      );

+    TerminalDevice->OutputEscChar = TRUE;

+    Status                        = This->OutputString (This, ResizeSequence);

+    TerminalDevice->OutputEscChar = FALSE;

+    if (EFI_ERROR (Status)) {

+      return EFI_DEVICE_ERROR;

+    }

+  }

+

   This->Mode->Mode  = (INT32) ModeNumber;

   Status            = This->ClearScreen (This);

diff --git a/MdeModulePkg/Universal/Console/TerminalDxe/TerminalDxe.inf b/MdeModulePkg/Universal/Console/TerminalDxe/TerminalDxe.inf

index b2a8aeba85..eff6253465 100644

--- a/MdeModulePkg/Universal/Console/TerminalDxe/TerminalDxe.inf

+++ b/MdeModulePkg/Universal/Console/TerminalDxe/TerminalDxe.inf

@@ -55,6 +55,7 @@

   DebugLib

   PcdLib

   BaseLib

+  PrintLib

 [Guids]

   ## SOMETIMES_PRODUCES ## Variable:L"ConInDev"

@@ -87,6 +88,7 @@

 [Pcd]

   gEfiMdePkgTokenSpaceGuid.PcdDefaultTerminalType           ## SOMETIMES_CONSUMES

   gEfiMdeModulePkgTokenSpaceGuid.PcdErrorCodeSetVariable    ## CONSUMES

+  gEfiMdeModulePkgTokenSpaceGuid.PcdResizeXterm             ## CONSUMES

 # [Event]

 # # Relative timer event set by UnicodeToEfiKey(), used to be one 2 seconds input timeout.