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pjs/extensions/xmlterm/base/ltermEscape.c

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/*
* The contents of this file are subject to the Mozilla Public
* License Version 1.1 (the "MPL"); you may not use this file
* except in compliance with the MPL. You may obtain a copy of
* the MPL at http://www.mozilla.org/MPL/
*
* Software distributed under the MPL is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the MPL for the specific language governing
* rights and limitations under the MPL.
*
* The Original Code is lineterm.
*
* The Initial Developer of the Original Code is Ramalingam Saravanan.
* Portions created by Ramalingam Saravanan <svn@xmlterm.org> are
* Copyright (C) 1999 Ramalingam Saravanan. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the
* terms of the GNU General Public License (the "GPL"), in which case
* the provisions of the GPL are applicable instead of
* those above. If you wish to allow use of your version of this
* file only under the terms of the GPL and not to allow
* others to use your version of this file under the MPL, indicate
* your decision by deleting the provisions above and replace them
* with the notice and other provisions required by the GPL.
* If you do not delete the provisions above, a recipient
* may use your version of this file under either the MPL or the
* GPL.
*/
/* ltermEscape.c: LTERM escape sequence processing
*/
/* public declarations */
#include "lineterm.h"
/* private declarations */
#include "ltermPrivate.h"
static int ltermProcessCSISequence(struct lterms *lts, const UNICHAR *buf,
int count, const UNISTYLE *style,
int *consumed, int *opcodes,
int *opvals, int *oprow);
static int ltermProcessDECPrivateMode(struct lterms *lts,
const int *paramValues, int paramCount, UNICHAR uch, int *opcodes);
static int ltermProcessXTERMSequence(struct lterms *lts, const UNICHAR *buf,
int count, const UNISTYLE *style,int *consumed,int *opcodes);
static int ltermProcessXMLTermSequence(struct lterms *lts, const UNICHAR *buf,
int count, const UNISTYLE *style,int *consumed,int *opcodes);
/** Processes ESCAPE sequence in string BUF containing COUNT characters,
* returning the number of characters CONSUMED and the OPCODES.
* Using Extended Backus-Naur Form notation:
* OPCODES ::= 0 if the sequence was processed without any change of
* outputMode or terminating condition.
* OPCODES ::= LINEDATA OUTPUT if a switch from LineMode to ScreenMode
* or StreamMode was triggered by the ESCAPE sqeuence.
* OPCODES ::= SCREENDATA ( CLEAR | INSERT | DELETE | SCROLL )?
* for screenMode escape sequences or if a switch from ScreenMode to StreamMode
* was triggered by the ESCAPE sequence.
* (A switch from ScreenMode to LineMode is not considered a terminating
* condition and occurs transparently.)
* OPVALS contains return value(s) for specific screen operations
* such as INSERT, DELETE, and SCROLL.
* OPROW contains the row value for specific screen operations such as
* INSERT, DELETE, and SCROLL (or -1, cursor row is to be used).
*
* OPVALS contains return value(s) for specific screen operations
* such as INSERT and DELETE.
* OPROW contains the row value for specific screen operations such as
* INSERT and DELETE (or -1, cursor row is to be used).
*
* @return 0 on successful processing of the ESCAPE sequence,
* 1 if BUF contains an incomplete ESCAPE sequence,
* -1 if error an error occurred.
*/
int ltermProcessEscape(struct lterms *lts, const UNICHAR *buf,
int count, const UNISTYLE *style, int *consumed,
int *opcodes, int *opvals, int *oprow)
{
struct LtermOutput *lto = &(lts->ltermOutput);
LTERM_LOG(ltermProcessEscape,50,("count=%d, buf[1]='%c', cursorChar=%d, Chars=%d\n",
count, buf[1], lto->outputCursorChar, lto->outputChars));
if (count < 2) {
/* Incomplete Escape sequence */
*consumed = 0;
return 1;
}
if (buf[1] == U_LBRACKET) {
/* ESC [ Process CSI sequence */
return ltermProcessCSISequence(lts, buf, count, style, consumed,
opcodes, opvals, oprow);
}
if (buf[1] == U_RBRACKET) {
/* ESC ] Process XTERM sequence */
return ltermProcessXTERMSequence(lts, buf, count, style, consumed,
opcodes);
}
if (buf[1] == U_LCURLY) {
/* ESC { Process XMLTerm sequence */
return ltermProcessXMLTermSequence(lts, buf, count, style, consumed,
opcodes);
}
/* Assume two characters will be consumed at this point */
*consumed = 2;
switch (buf[1]) {
/* Three character sequences */
case U_NUMBER: /* ESC # 8 DEC Screen Alignment Test */
case U_LPAREN: /* ESC ( C Designate G0 Character Set */
case U_RPAREN: /* ESC ) C Designate G1 Character Set */
case U_STAR: /* ESC * C Designate G2 Character Set */
case U_PLUS: /* ESC + C Designate G3 Character Set */
case U_DOLLAR: /* ESC $ C Designate Kanji Character Set */
LTERM_LOG(ltermProcessEscape,51,("3 char sequence, buf[1:2]='%c%c'\n",
buf[1], buf[2]));
if (count < 3) {
/* Incomplete Escape sequence */
*consumed = 0;
return 1;
}
*consumed = 3;
if (buf[1] == U_NUMBER) {
/* ESC # 8 DEC Screen Alignment Test */
} else {
/* ESC ()*+$ C Designate Character Set */
}
return 0;
/* Two character sequences */
case U_SEVEN: /* ESC 7 Save Cursor */
LTERM_LOG(ltermProcessEscape,2,("Unimplemented %c\n", buf[1]));
return 0;
case U_EIGHT: /* ESC 8 Restore Cursor */
LTERM_LOG(ltermProcessEscape,2,("Unimplemented %c\n", buf[1]));
return 0;
case U_EQUALS: /* ESC = Application Keypad */
LTERM_LOG(ltermProcessEscape,52,("Application Keypad\n"));
if (lto->outputMode == LTERM2_LINE_MODE) {
ltermSwitchToScreenMode(lts);
*opcodes = LTERM_LINEDATA_CODE | LTERM_OUTPUT_CODE;
}
return 0;
case U_GREATERTHAN: /* ESC > Normal Keypad */
LTERM_LOG(ltermProcessEscape,52,("Normal Keypad\n"));
if (lto->outputMode == LTERM1_SCREEN_MODE) {
ltermSwitchToLineMode(lts);
*opcodes = LTERM_SCREENDATA_CODE | LTERM_CLEAR_CODE;
}
return 0;
case U_D_CHAR: /* ESC D Index (IND) */
LTERM_LOG(ltermProcessEscape,52,("Index\n"));
if (lto->outputMode == LTERM1_SCREEN_MODE) {
/* Scroll up */
if (ltermInsDelEraseLine(lts, 1, lto->topScrollRow, LTERM_DELETE_ACTION) != 0)
return -1;
*opcodes = LTERM_SCREENDATA_CODE | LTERM_DELETE_CODE;
*opvals = 1;
*oprow = lto->topScrollRow;
}
return 0;
case U_E_CHAR: /* ESC E Next Line (NEL) */
if (lto->outputMode == LTERM1_SCREEN_MODE) {
if (lto->cursorRow > 0)
lto->cursorRow--;
}
return 0;
case U_H_CHAR: /* ESC H Tab Set (HTS) */
LTERM_LOG(ltermProcessEscape,2,("Unimplemented %c\n", buf[1]));
return 0;
case U_M_CHAR: /* ESC M Reverse Index (TI) */
LTERM_LOG(ltermProcessEscape,52,("Reverse Index\n"));
if (lto->outputMode == LTERM1_SCREEN_MODE) {
/* Scroll down */
if (ltermInsDelEraseLine(lts, 1, lto->topScrollRow, LTERM_INSERT_ACTION) != 0)
return -1;
*opcodes = LTERM_SCREENDATA_CODE | LTERM_INSERT_CODE;
*opvals = 1;
*oprow = lto->topScrollRow;
}
return 0;
case U_N_CHAR: /* ESC N Single Shift Select of G2 Character Set */
LTERM_LOG(ltermProcessEscape,2,("Unimplemented %c\n", buf[1]));
return 0;
case U_O_CHAR: /* ESC O Single Shift Select of G3 Character Set */
LTERM_LOG(ltermProcessEscape,2,("Unimplemented %c\n", buf[1]));
return 0;
case U_Z_CHAR: /* ESC Z Obsolete form of ESC[c */
LTERM_LOG(ltermProcessEscape,2,("Unimplemented %c\n", buf[1]));
return 0;
case U_c_CHAR: /* ESC c Full reset (RIS) */
LTERM_LOG(ltermProcessEscape,2,("Unimplemented %c\n", buf[1]));
return 0;
case U_n_CHAR: /* ESC n Invoke the G2 Character Set */
LTERM_LOG(ltermProcessEscape,2,("Unimplemented %c\n", buf[1]));
return 0;
case U_o_CHAR: /* ESC o Invoke the G3 Character Set */
LTERM_LOG(ltermProcessEscape,2,("Unimplemented %c\n", buf[1]));
return 0;
default:
LTERM_WARNING("ltermProcessEscape: Warning - unknown sequence %x\n",
buf[1]);
return 0;
}
}
/** Processes CSI sequence (a special case of Escape sequence processing)
* @return 0 on success and -1 on error.
*/
static int ltermProcessCSISequence(struct lterms *lts, const UNICHAR *buf,
int count, const UNISTYLE *style,
int *consumed, int *opcodes,
int *opvals, int *oprow)
{
struct LtermOutput *lto = &(lts->ltermOutput);
int offset, value, privateMode;
int paramCount, paramValues[MAXESCAPEPARAMS], param1, param2;
if (count < 3) {
/* Incomplete Escape sequence */
*consumed = 0;
return 1;
}
LTERM_LOG(ltermProcessCSISequence,50,("buf[2]='%c', cursorChar=%d, Chars=%d\n",
buf[2], lto->outputCursorChar, lto->outputChars));
privateMode = 0;
offset = 2;
if (buf[2] == U_QUERYMARK) {
/* ESC [ ? Process DEC Private Mode */
privateMode = 1;
offset = 3;
}
/* Process numerical parameters */
paramCount = 0;
while ((offset < count) &&
((buf[offset] >= (UNICHAR)U_ZERO) &&
(buf[offset] <= (UNICHAR)U_NINE)) ) {
/* Starts with a digit */
value = buf[offset] - U_ZERO;
offset++;
/* Process all contiguous digits */
while ((offset < count) &&
((buf[offset] >= (UNICHAR)U_ZERO) &&
(buf[offset] <= (UNICHAR)U_NINE)) ) {
value = value * 10 + buf[offset] - U_ZERO;
offset++;
}
if (offset == count) {
/* Incomplete Escape sequence */
*consumed = 0;
return 1;
}
if (paramCount < MAXESCAPEPARAMS) {
/* Store numerical parameter */
paramValues[paramCount++] = value;
} else {
/* Numeric parameter buffer overflow */
LTERM_WARNING("ltermProcessCSISequence: Warning - numeric parameter buffer overflow\n");
}
/* If next character not semicolon, stop processing */
if (buf[offset] != U_SEMICOLON)
break;
/* Process next argument */
offset++;
}
if (offset == count) {
/* Incomplete Escape sequence */
*consumed = 0;
return 1;
}
/* Assume that all parsed characters will be consumed at this point */
*consumed = offset+1;
LTERM_LOG(ltermProcessCSISequence,51,("paramCount=%d, offset=%d, buf[offset]='%d'\n",
paramCount, offset, buf[offset]));
if (privateMode) {
/* ESC [ ? Process DEC Private Mode */
return ltermProcessDECPrivateMode( lts, paramValues, paramCount,
buf[offset], opcodes);
}
/* Set returned opcodes to zero */
*opcodes = 0;
/* Default parameter values: 1, 1 */
param1 = (paramCount > 0) ? paramValues[0] : 1;
param2 = (paramCount > 1) ? paramValues[1] : 1;
switch (buf[offset]) {
case U_ATSIGN: /* Insert Ps (Blank) Character(s) [default: 1] (ICH) */
if (ltermInsDelEraseChar(lts, param1, LTERM_INSERT_ACTION) != 0)
return -1;
return 0;
case U_e_CHAR:
case U_A_CHAR: /* Cursor Up Ps Times [default: 1] (CUU) */
LTERM_LOG(ltermProcessCSISequence,52,("Cursor Up Count = %d\n", param1));
if (lto->outputMode == LTERM1_SCREEN_MODE) {
lto->cursorRow += param1;
if (lto->cursorRow >= lts->nRows)
lto->cursorRow = lts->nRows - 1;
}
return 0;
case U_B_CHAR: /* Cursor Down Ps Times [default: 1] (CUD) */
LTERM_LOG(ltermProcessCSISequence,52,("Cursor Down Count = %d\n", param1));
if (lto->outputMode == LTERM1_SCREEN_MODE) {
lto->cursorRow -= param1;
if (lto->cursorRow < 0)
lto->cursorRow = 0;
}
return 0;
case U_a_CHAR:
case U_C_CHAR: /* Cursor Forward Ps Times [default: 1] (CUF) */
LTERM_LOG(ltermProcessCSISequence,52,("Cursor Forward Count = %d\n",
param1));
if (lto->outputMode == LTERM2_LINE_MODE) {
if (param1 <= (lto->outputChars - lto->outputCursorChar)) {
lto->outputCursorChar += param1;
} else {
lto->outputCursorChar = lto->outputChars;
}
} else {
lto->cursorCol += param1;
if (lto->cursorCol >= lts->nCols)
lto->cursorCol = lts->nCols-1;
}
return 0;
case U_D_CHAR: /* Cursor Backward Ps Times [default: 1] (CUB) */
LTERM_LOG(ltermProcessCSISequence,52,("Cursor Back Count = %d\n", param1));
if (lto->outputMode == LTERM2_LINE_MODE) {
if (param1 <= lto->outputCursorChar) {
lto->outputCursorChar -= param1;
} else {
lto->outputCursorChar = 0;
}
} else {
lto->cursorCol -= param1;
if (lto->cursorCol < 0)
lto->cursorCol = 0;
}
return 0;
case U_E_CHAR: /* Cursor Down Ps Times [default: 1] and to first column */
LTERM_LOG(ltermProcessCSISequence,52,("Cursor Down and First Count = %d\n",
param1));
if (lto->outputMode == LTERM1_SCREEN_MODE) {
lto->cursorCol = 0;
lto->cursorRow -= param1;
if (lto->cursorRow < 0)
lto->cursorRow = 0;
}
return 0;
case U_F_CHAR: /* Cursor Up Ps Times [default: 1] and to first column */
LTERM_LOG(ltermProcessCSISequence,52,("Cursor Up and First Count = %d\n",
param1));
if (lto->outputMode == LTERM1_SCREEN_MODE) {
lto->cursorCol = 0;
lto->cursorRow += param1;
if (lto->cursorRow >= lts->nRows)
lto->cursorRow = lts->nRows - 1;
}
return 0;
case U_SNGLQUOTE:
case U_G_CHAR: /* Cursor to Column Ps (HPA) */
LTERM_LOG(ltermProcessCSISequence,52,("Cursor to Column = %d\n", param1));
if (lto->outputMode == LTERM1_SCREEN_MODE) {
lto->cursorCol = param1-1;
if (lto->cursorCol < 0) {
lto->cursorCol = 0;
} else if (lto->cursorCol >= lts->nCols) {
lto->cursorCol = lts->nCols - 1;
}
}
return 0;
case U_H_CHAR: /* Cursor Position [row;column] [default: 1;1] (CUP) */
LTERM_LOG(ltermProcessCSISequence,52,("Cursor Position = (%d, %d)\n",
param1, param2));
if (lto->outputMode == LTERM2_LINE_MODE) {
/* Line mode */
if ((param1 > 0) && ((param1-1) <= lto->outputChars)) {
lto->outputCursorChar = param1-1;
} else {
lto->outputCursorChar = 0;
}
} else {
/* Screen mode */
lto->cursorRow = lts->nRows - param1;
if (lto->cursorRow < 0) {
lto->cursorRow = 0;
} else if (lto->cursorRow >= lts->nRows) {
lto->cursorRow = lts->nRows - 1;
}
lto->cursorCol = param2 - 1;
if (lto->cursorCol < 0) {
lto->cursorCol = 0;
} else if (lto->cursorCol >= lts->nCols) {
lto->cursorCol = lts->nCols - 1;
}
}
return 0;
case U_I_CHAR: /* Move forward Ps tab stops [default: 1] */
LTERM_LOG(ltermProcessCSISequence,2,("Unimplemented %c\n", buf[offset]));
return 0;
case U_J_CHAR: /* Erase in Display (ED)
* Ps = 0 Clear Below (default)
* Ps = 1 Clear Above
* Ps = 2 Clear All
*/
param1 = (paramCount > 0) ? paramValues[0] : 0;
LTERM_LOG(ltermProcessCSISequence,52,("Erase display code %d\n", param1));
if (lto->outputMode == LTERM2_LINE_MODE) {
/* Clear line */
ltermClearOutputLine(lts);
/* Set opcodes to return incomplete line */
*opcodes = LTERM_LINEDATA_CODE;
} else {
/* Screen mode */
int eraseLines, j;
if ((param1 == 0) && (lto->cursorRow == lts->nRows-1))
param1 = 2;
switch (param1) {
case 0: /* Clear below */
eraseLines = lto->cursorRow + 1;
if (ltermInsDelEraseLine(lts, eraseLines, lto->cursorRow, LTERM_ERASE_ACTION) != 0)
return -1;
/* Set line modification flags */
for (j=0; j<=lto->cursorRow; j++) {
lto->modifiedCol[j] = lts->nCols-1;
}
break;
case 1: /* Clear above */
eraseLines = lts->nRows - lto->cursorRow - 1;
if (ltermInsDelEraseLine(lts, eraseLines, lts->nRows-1, LTERM_ERASE_ACTION) != 0)
return -1;
/* Set line modification flags */
for (j=lto->cursorRow; j<lts->nRows; j++) {
lto->modifiedCol[j] = lts->nCols-1;
}
break;
case 2: /* Clear all */
eraseLines = lts->nRows;
if (ltermInsDelEraseLine(lts, eraseLines, lts->nRows-1, LTERM_ERASE_ACTION) != 0)
return -1;
/* Clear screen */
*opcodes = LTERM_SCREENDATA_CODE|LTERM_CLEAR_CODE;
break;
default: /* Invalid line erase code */
LTERM_WARNING("ltermProcessCSISequence: Warning - invalid line erase code %d\n", param1);
}
}
return 0;
case U_K_CHAR: /* Erase in Line (EL)
* Ps = 0 Clear to Right (default)
* Ps = 1 Clear to Left
* Ps = 2 Clear All
*/
param1 = (paramCount > 0) ? paramValues[0] : 0;
LTERM_LOG(ltermProcessCSISequence,52,("Line erase code %d\n", param1));
if (lto->outputMode == LTERM2_LINE_MODE) {
/* Line mode */
switch(param1) {
case 0: /* Clear to Right */
lto->outputChars = lto->outputCursorChar;
lto->outputModifiedChar = lto->outputCursorChar;
break;
case 1: /* Clear to Left */
lto->outputChars -= lto->outputCursorChar;
lto->outputCursorChar = 0;
lto->outputModifiedChar = 0;
break;
case 2: /* Clear All */
lto->outputChars = 0;
lto->outputCursorChar = 0;
lto->outputModifiedChar = 0;
break;
default: /* Invalid char erase code */
LTERM_WARNING("ltermProcessCSISequence: Warning - invalid char erase code %d\n", param1);
}
} else {
/* Screen mode */
int eraseCount = 0;
switch(param1) {
case 0: /* Clear to Right */
eraseCount = lts->nCols - lto->cursorCol;
if (ltermInsDelEraseChar(lts, eraseCount, LTERM_ERASE_ACTION) != 0)
return -1;
break;
case 1: /* Clear to Left */
eraseCount = lto->cursorCol;
lto->cursorCol = 0;
if (ltermInsDelEraseChar(lts, eraseCount, LTERM_ERASE_ACTION) != 0)
return -1;
lto->cursorCol = eraseCount;
break;
case 2: /* Clear All */
eraseCount = lts->nCols;
lto->cursorCol = 0;
if (ltermInsDelEraseChar(lts, eraseCount, LTERM_ERASE_ACTION) != 0)
return -1;
lto->cursorCol = eraseCount;
break;
default: /* Invalid erase code */
LTERM_WARNING("ltermProcessCSISequence: Warning - invalid erase code %d\n", param1);
}
}
return 0;
case U_L_CHAR: /* Insert Ps Line(s) [default: 1] (IL) */
LTERM_LOG(ltermProcessCSISequence,52,("Insert Line Count = %d\n", param1));
if (lto->outputMode == LTERM1_SCREEN_MODE) {
if (ltermInsDelEraseLine(lts, param1, lto->cursorRow, LTERM_INSERT_ACTION) != 0)
return -1;
*opcodes = LTERM_SCREENDATA_CODE|LTERM_INSERT_CODE;
*opvals = param1;
*oprow = lto->cursorRow;
}
return 0;
case U_M_CHAR: /* Delete Ps Line(s) [default: 1] (DL) */
LTERM_LOG(ltermProcessCSISequence,52,("Delete Line Count = %d\n", param1));
if (lto->outputMode == LTERM1_SCREEN_MODE) {
if (ltermInsDelEraseLine(lts, param1, lto->cursorRow, LTERM_DELETE_ACTION) != 0)
return -1;
*opcodes = LTERM_SCREENDATA_CODE|LTERM_DELETE_CODE;
*opvals = param1;
*oprow = lto->cursorRow;
}
return 0;
case U_P_CHAR: /* Delete Ps Character(s) [default: 1] (DCH) */
if (ltermInsDelEraseChar(lts, param1, LTERM_DELETE_ACTION) != 0)
return -1;
return 0;
case U_T_CHAR: /* Initiate hilite mouse tracking. Parameters
* [func;startx;starty;firstrow;lastrow].
*/
LTERM_LOG(ltermProcessCSISequence,2,("Unimplemented %c\n", buf[offset]));
return 0;
case U_W_CHAR: /* Tabulator functions:
* Ps = 0 Tab Set (HTS)
* Ps = 2 Tab Clear (TBC), Clear Current Column (default)
* Ps = 5 Tab Clear (TBC), Clear All
*/
LTERM_LOG(ltermProcessCSISequence,2,("Unimplemented %c\n", buf[offset]));
return 0;
case U_X_CHAR: /* Erase Ps Character(s) [default: 1] (ECH) */
if (ltermInsDelEraseChar(lts, param1, LTERM_ERASE_ACTION) != 0)
return -1;
return 0;
case U_Z_CHAR: /* Move backward Ps [default: 1] tab stops */
LTERM_LOG(ltermProcessCSISequence,2,("Unimplemented %c\n", buf[offset]));
return 0;
case U_c_CHAR: /* Send Device Attributes (DA)
* Ps = 0 (or omitted) : request attributes from terminal
* returns: ESC[?1;2c
* (``I am a VT100 with Advanced Video Option'')
*/
LTERM_LOG(ltermProcessCSISequence,52,("Device Attr %d\n", param1));
{
char deviceAttr[] = "\033[?1;2c";
if (ltermSendChar(lts, deviceAttr, strlen(deviceAttr)) != 0)
return -1;
}
return 0;
case U_d_CHAR: /* Cursor to Line Ps (VPA) */
LTERM_LOG(ltermProcessCSISequence,52,("Cursor to Line = %d\n", param1));
if (lto->outputMode == LTERM1_SCREEN_MODE) {
lto->cursorRow = lts->nRows - param1;
if (lto->cursorRow < 0) {
lto->cursorRow = 0;
} else if (lto->cursorRow >= lts->nRows) {
lto->cursorRow = lts->nRows - 1;
}
}
return 0;
case U_f_CHAR: /* Horizontal and Vertical Position [row;column] (HVP)
* [default: 1;1]
*/
LTERM_LOG(ltermProcessCSISequence,2,("Unimplemented %c\n", buf[offset]));
return 0;
case U_g_CHAR: /* Tab Clear (TBC)
* Ps = 0 Clear Current Column (default)
* Ps = 3 Clear All (TBC)
*/
LTERM_LOG(ltermProcessCSISequence,2,("Unimplemented %c\n", buf[offset]));
return 0;
case U_i_CHAR: /* Printing
* Ps = 4 disable transparent print mode (MC4)
* Ps = 5 enable transparent print mode (MC5)
*/
LTERM_LOG(ltermProcessCSISequence,2,("Unimplemented %c\n", buf[offset]));
return 0;
case U_h_CHAR: /* Set Mode (SM)
* Ps = 4 Insert Mode (SMIR)
* Ps = 20 Automatic Newline (LNM)
*/
LTERM_LOG(ltermProcessCSISequence,52,("Set Mode %d\n", param1));
if (param1 == 4) {
lto->insertMode = 1;
} else if (param1 == 4) {
lto->automaticNewline = 1;
} if ((param1 % 100) == 47) {
/* Switch to alternate buffer */
if (lto->outputMode == LTERM2_LINE_MODE) {
ltermSwitchToScreenMode(lts);
*opcodes = LTERM_LINEDATA_CODE | LTERM_OUTPUT_CODE;
}
}
return 0;
case U_l_CHAR: /* Reset Mode (RM)
* Ps = 4 Replace Mode (RMIR)
* Ps = 20 Normal Linefeed (LNM)
*/
LTERM_LOG(ltermProcessCSISequence,52,("Reset Mode %d\n", param1));
if (param1 == 4) {
lto->insertMode = 0;
} else if (param1 == 4) {
lto->automaticNewline = 0;
} if ((param1 % 100) == 47) {
/* Switch to regular buffer */
if (lto->outputMode == LTERM1_SCREEN_MODE) {
ltermSwitchToLineMode(lts);
*opcodes = LTERM_SCREENDATA_CODE | LTERM_CLEAR_CODE;
}
}
return 0;
case U_m_CHAR: /* Character Attributes (SGR)
* Ps = 0 Normal (default)
* Ps = 1 / 22 On / Off Bold (bright fg)
* Ps = 4 / 24 On / Off Underline
* Ps = 5 / 25 On / Off Blink (bright bg)
* Ps = 7 / 27 On / Off Inverse
* Ps = 30 / 40 fg/bg Black
* Ps = 31 / 41 fg/bg Red
* Ps = 32 / 42 fg/bg Green
* Ps = 33 / 43 fg/bg Yellow
* Ps = 34 / 44 fg/bg Blue
* Ps = 35 / 45 fg/bg Magenta
* Ps = 36 / 46 fg/bg Cyan
* Ps = 37 / 47 fg/bg White
* Ps = 39 / 49 fg/bg Default
*/
/* Enforce default value for parameter (hack!) */
if (paramCount == 0)
param1 = 0;
LTERM_LOG(ltermProcessCSISequence,52,("Character Attr %d\n", param1));
switch (param1) {
case 0:
lto->styleMask = 0;
break;
case 1:
lto->styleMask |= LTERM_BOLD_STYLE;
break;
case 22:
lto->styleMask &= ~LTERM_BOLD_STYLE;
break;
case 4:
lto->styleMask |= LTERM_ULINE_STYLE;
break;
case 24:
lto->styleMask &= ~LTERM_ULINE_STYLE;
break;
case 5:
lto->styleMask |= LTERM_BLINK_STYLE;
break;
case 25:
lto->styleMask &= ~LTERM_BLINK_STYLE;
break;
case 7:
lto->styleMask |= LTERM_INVERSE_STYLE;
break;
case 27:
lto->styleMask &= ~LTERM_INVERSE_STYLE;
break;
default:
break;
}
return 0;
case U_n_CHAR: /* Device Status Report (DSR)
* Ps = 5 Status Report ESC [ 0 n (``OK'')
* Ps = 6 Report Cursor Position (CPR) [row;column]
* as ESC [ r ; c R
* Ps = 7 Request Display Name
* Ps = 8 Request Version Number (place in window title)
*/
LTERM_LOG(ltermProcessCSISequence,52,("Status Report %d\n", param1));
switch (param1) {
case 5:
{
char statusReport[] = "\033[01";
if (ltermSendChar(lts, statusReport, strlen(statusReport)) != 0)
return -1;
}
break;
case 6:
if (lto->outputMode == LTERM1_SCREEN_MODE) {
int iRow = lts->nRows-lto->cursorRow;
int iCol = lto->cursorCol+1;
char cursorPos[13];
if ((iRow > 0) && (iRow < 10000) && (iCol > 0) && (iCol < 10000)) {
if (sprintf(cursorPos, "\033[%d;%dR", iRow, iCol) > 12) {
LTERM_ERROR("ltermProcessCSISequence: Error - DSR buffer overflow\n");
}
if (ltermSendChar(lts, cursorPos, strlen(cursorPos)) != 0)
return -1;
}
}
break;
default:
break;
}
return 0;
case U_r_CHAR: /* Set Scrolling Region [top;bottom]
* [default: full size of window] (CSR)
*/
if (lto->outputMode == LTERM1_SCREEN_MODE) {
if (paramCount == 0) {
param1 = 1;
param2 = lts->nRows;
}
LTERM_LOG(ltermProcessCSISequence,52,("Scrolling Region (%d, %d)\n",
param1, param2));
lto->topScrollRow = (param1 > 0) ? lts->nRows - param1 : lts->nRows - 1;
if (lto->topScrollRow < 0)
lto->topScrollRow = 0;
lto->botScrollRow = (param2 > 0) ? lts->nRows - param2 : lts->nRows - 1;
if (lto->botScrollRow < 0)
lto->botScrollRow = 0;
if (lto->topScrollRow < lto->botScrollRow) {
int temRow = lto->topScrollRow;
lto->topScrollRow = lto->botScrollRow;
lto->botScrollRow = temRow;
}
*opcodes = LTERM_SCREENDATA_CODE|LTERM_SCROLL_CODE;
*opvals = lto->topScrollRow;
*oprow = lto->botScrollRow;
}
return 0;
case U_x_CHAR: /* Request Terminal Parameters (DECREQTPARM) */
LTERM_LOG(ltermProcessCSISequence,2,("Unimplemented %c\n", buf[offset]));
return 0;
default: /* Unknown Escape sequence */
LTERM_WARNING("ltermProcessCSISequence: Warning - unknown sequence %x\n",
buf[offset]);
return 0;
}
}
/** Processes DEC Private Modes (a special case of CSI sequence processing)
* ESC [ ? Pm h
* @return 0 on success and -1 on error.
*/
static int ltermProcessDECPrivateMode(struct lterms *lts,
const int *paramValues, int paramCount, UNICHAR uch, int *opcodes)
{
struct LtermOutput *lto = &(lts->ltermOutput);
int param1, param2;
LTERM_LOG(ltermProcessDECPrivateMode,50,("ch='%c', cursorChar=%d, Chars=%d\n",
(char) uch, lto->outputCursorChar, lto->outputChars));
/* Set returned opcodes to zero */
*opcodes = 0;
/* Default parameter values: 1, 1 */
param1 = (paramCount > 0) ? paramValues[0] : 1;
param2 = (paramCount > 1) ? paramValues[1] : 1;
switch (uch) {
case U_h_CHAR: /* DEC Private Mode Set (DECSET) */
LTERM_LOG(ltermProcessDECPrivateMode,2,("Unimplemented %c\n", (char) uch));
if ((param1 % 100) == 47) {
/* Switch to screen mode */
if (lto->outputMode == LTERM2_LINE_MODE) {
ltermSwitchToScreenMode(lts);
*opcodes = LTERM_LINEDATA_CODE | LTERM_OUTPUT_CODE;
}
}
return 0;
case U_l_CHAR: /* DEC Private Mode Reset (DECRST) */
LTERM_LOG(ltermProcessDECPrivateMode,2,("Unimplemented %c\n", (char) uch));
if ((param1 % 100) == 47) {
/* Switch to line mode */
if (lto->outputMode == LTERM1_SCREEN_MODE) {
ltermSwitchToLineMode(lts);
*opcodes = LTERM_SCREENDATA_CODE | LTERM_CLEAR_CODE;
}
}
return 0;
case U_r_CHAR: /* Restore previously saved DEC Private Mode Values */
LTERM_LOG(ltermProcessDECPrivateMode,2,("Unimplemented %c\n", (char) uch));
return 0;
case U_s_CHAR: /* Save DEC Private Mode Values */
LTERM_LOG(ltermProcessDECPrivateMode,2,("Unimplemented %c\n", (char) uch));
return 0;
case U_t_CHAR: /* Toggle DEC Private Mode Values */
LTERM_LOG(ltermProcessDECPrivateMode,2,("Unimplemented %c\n", (char) uch));
return 0;
default: /* Unknown escape sequence */
LTERM_WARNING("ltermProcessDECPrivateMode: Warning - unknown sequence %x\n",
uch);
return 0;
}
}
/** Processes XTERM sequence (a special case of Escape sequence processing)
* ESC ] Ps;Pt BEL
* @return 0 on success and -1 on error.
*/
static int ltermProcessXTERMSequence(struct lterms *lts, const UNICHAR *buf,
int count, const UNISTYLE *style,int *consumed,int *opcodes)
{
struct LtermOutput *lto = &(lts->ltermOutput);
int offset, paramValue, strLength;
UNICHAR paramString[MAXSTRINGPARAM+1];
if (count < 3) {
/* Incomplete Escape sequence */
*consumed = 0;
return 1;
}
LTERM_LOG(ltermProcessXTERMSequence,50,("cursorChar=%d, Chars=%d\n",
lto->outputCursorChar, lto->outputChars));
offset = 2;
/* Set returned opcodes to zero */
*opcodes = 0;
/* Process numerical parameter */
paramValue = 0;
while ((offset < count) &&
((buf[offset] >= (UNICHAR)U_ZERO) &&
(buf[offset] <= (UNICHAR)U_NINE)) ) {
paramValue = paramValue * 10 + buf[offset] - U_ZERO;
offset++;
}
if (offset == count) {
/* Incomplete Escape sequence */
*consumed = 0;
return 1;
}
if (buf[offset] != U_SEMICOLON) {
/* If next character not semicolon, return */
*consumed = offset;
return 0;
}
LTERM_LOG(ltermProcessXTERMSequence,51,("paramValue=%d, offset=%d, buf[offset]=%x\n",
paramValue, offset, buf[offset]));
/* Skip the semicolon */
offset++;
/* Process string parameter */
strLength = 0;
while ((offset < count) && (buf[offset] != U_BEL)) {
if (strLength < MAXSTRINGPARAM) {
paramString[strLength++] = buf[offset];
offset++;
} else {
LTERM_WARNING("ltermProcessXTERMSequence: Warning - string parameter too long; truncated\n");
break;
}
}
if (offset == count) {
/* Incomplete Escape sequence */
*consumed = 0;
return 1;
}
/* Insert terminating NULL character in string */
paramString[strLength] = U_NUL;
LTERM_LOGUNICODE(ltermProcessXTERMSequence,52,(paramString, strLength));
/* All parsed characters have been consumed at this point */
*consumed = offset+1;
LTERM_WARNING("ltermProcessXTERMSequence: Warning - unimplemented %c\n",
buf[offset]);
return 0;
}
/** Processes XMLTerm sequence (a special case of Escape sequence processing)
* XMLterm escape sequences are of the form
* ESC { Pm C Pt LF
* where Pm denotes multiple numeric arguments separated by semicolons,
* character C is a not a digit and not a semicolon,
* text parameter Pt may be a null string, and
* LF is the linefeed character.
* Omitted numeric parameters are assumed to be zero.
* Any carriage return character preceding the terminating LF is discarded.
* @return 0 on success and -1 on error.
*/
static int ltermProcessXMLTermSequence(struct lterms *lts, const UNICHAR *buf,
int count, const UNISTYLE *style,int *consumed,int *opcodes)
{
struct LtermOutput *lto = &(lts->ltermOutput);
int offset, value, strLength;
int paramCount, paramValues[MAXESCAPEPARAMS], param1, param2, param3;
UNICHAR termChar, paramString[MAXSTRINGPARAM+1];
char paramCString[MAXSTRINGPARAM+1];
if (count < 4) {
/* Incomplete Escape sequence */
*consumed = 0;
return 1;
}
LTERM_LOG(ltermProcessXMLTermSequence,50,("cursorChar=%d, Chars=%d\n",
lto->outputCursorChar, lto->outputChars));
offset = 2;
/* Set returned opcodes to zero */
*opcodes = 0;
/* Process numerical parameters */
paramCount = 0;
while ((offset < count) &&
((buf[offset] >= (UNICHAR)U_ZERO) &&
(buf[offset] <= (UNICHAR)U_NINE)) ) {
/* Starts with a digit */
value = buf[offset] - U_ZERO;
offset++;
/* Process all contiguous digits */
while ((offset < count) &&
((buf[offset] >= (UNICHAR)U_ZERO) &&
(buf[offset] <= (UNICHAR)U_NINE)) ) {
value = value * 10 + buf[offset] - U_ZERO;
offset++;
}
if (offset == count) {
/* Incomplete Escape sequence */
*consumed = 0;
return 1;
}
if (paramCount < MAXESCAPEPARAMS) {
/* Store numerical parameter */
paramValues[paramCount++] = value;
} else {
/* Numeric parameter buffer overflow */
LTERM_WARNING("ltermProcessXMLTermSequence: Warning - numeric parameter buffer overflow\n");
}
/* If next character not semicolon, stop processing */
if (buf[offset] != U_SEMICOLON)
break;
/* Process next argument */
offset++;
}
if (offset == count) {
/* Incomplete Escape sequence */
*consumed = 0;
return 1;
}
/* Terminating character */
termChar = buf[offset];
/* Skip terminating character */
offset++;
LTERM_LOG(ltermProcessXMLTermSequence,51,("paramCount=%d, offset=%d, termChar=%x\n",
paramCount, offset, termChar));
/* Process string parameter */
strLength = 0;
while ((offset < count) && (buf[offset] != U_LINEFEED)) {
if (strLength < MAXSTRINGPARAM) {
paramCString[strLength] = buf[offset];
paramString[strLength++] = buf[offset];
offset++;
} else {
LTERM_WARNING("ltermProcessXMLTermSequence: Warning - string parameter too long; truncated\n");
break;
}
}
if (offset == count) {
/* Incomplete Escape sequence */
*consumed = 0;
return 1;
}
/* Discard any CR character preceding the terminating LF character */
if ((strLength > 0) && (paramString[strLength-1] == U_CRETURN))
strLength--;
/* Insert terminating NULL character in string */
paramCString[strLength] = U_NUL;
paramString[strLength] = U_NUL;
LTERM_LOGUNICODE(ltermProcessXMLTermSequence,52,(paramString, strLength));
/* All parsed characters have been consumed at this point (including BEL) */
*consumed = offset+1;
/* Default parameter values: 0, 0, 0 */
param1 = (paramCount > 0) ? paramValues[0] : 0;
param2 = (paramCount > 1) ? paramValues[1] : 0;
param3 = (paramCount > 2) ? paramValues[2] : 0;
switch (termChar) {
int streamOpcodes;
case U_A_CHAR: /* Send XMLterm device attributes */
LTERM_LOG(ltermProcessXMLTermSequence,52,("Sending device attributes\n"));
if (ltermSendChar(lts, "\033{?", 3) != 0)
return -1;
if (strlen(lts->cookie) > 0) {
if (ltermSendChar(lts, lts->cookie, strlen(lts->cookie)) != 0)
return -1;
}
if (ltermSendChar(lts, "\n", 1) != 0)
return -1;
return 0;
case U_D_CHAR: /* Set debugging messageLevel/search-string */
LTERM_LOG(ltermProcessXMLTermSequence,52,("Setting message level etc.\n"));
if (strLength == 0) {
tlog_set_level(param1, param2, NULL);
} else {
tlog_set_level(param1, param2, paramCString);
}
return 0;
case U_E_CHAR: /* Enable/disable input echo setting */
if (param1) {
/* Enable input echo */
lts->disabledInputEcho = 0;
LTERM_LOG(ltermProcessXMLTermSequence,52,("Enabled input echo\n"));
} else {
/* Disable input echo */
lts->disabledInputEcho = 1;
LTERM_LOG(ltermProcessXMLTermSequence,52,("Disabled input echo\n"));
}
return 0;
case U_F_CHAR: /* Enable/disable full screen mode */
if (param1) {
/* Enable full screen mode */
if (lto->outputMode == LTERM2_LINE_MODE) {
ltermSwitchToScreenMode(lts);
*opcodes = LTERM_LINEDATA_CODE | LTERM_OUTPUT_CODE;
}
LTERM_LOG(ltermProcessXMLTermSequence,52,("Enabled full screen mode\n"));
} else {
/* Disable full screen mode */
if (lto->outputMode == LTERM1_SCREEN_MODE) {
ltermSwitchToLineMode(lts);
*opcodes = LTERM_SCREENDATA_CODE | LTERM_CLEAR_CODE;
}
LTERM_LOG(ltermProcessXMLTermSequence,52,("Disabled full screen mode\n"));
}
return 0;
case U_R_CHAR: /* Enable/disable raw input mode */
if (param1) {
/* Switch to raw input mode */
ltermSwitchToRawMode(lts);
LTERM_LOG(ltermProcessXMLTermSequence,52,("Raw input mode\n"));
} else {
/* Switch to regular input mode */
ltermClearInputLine(lts);
LTERM_LOG(ltermProcessXMLTermSequence,52,("Line input mode\n"));
}
return 0;
case U_J_CHAR: /* Switch to null-terminated Javascript stream mode */
case U_S_CHAR: /* Switch to null-terminated stream mode, with cookie */
if (lto->outputMode == LTERM1_SCREEN_MODE) {
*opcodes = LTERM_SCREENDATA_CODE;
} else if (lto->outputMode == LTERM2_LINE_MODE) {
*opcodes = LTERM_LINEDATA_CODE | LTERM_OUTPUT_CODE;
}
assert(lto->outputMode != LTERM0_STREAM_MODE);
/* Set stream codes */
streamOpcodes = 0;
if (termChar == U_J_CHAR) {
/* Javascript stream */
streamOpcodes |= LTERM_JSSTREAM_CODE;
} else {
/* HTML/XML stream */
if (param1)
streamOpcodes |= LTERM_DOCSTREAM_CODE;
if (param2)
streamOpcodes |= LTERM_XMLSTREAM_CODE;
if (param3)
streamOpcodes |= LTERM_WINSTREAM_CODE;
}
/* Check if cookie matches */
if ((strLength > 0) && (strcmp(paramCString, lts->cookie) == 0)) {
streamOpcodes |= LTERM_COOKIESTR_CODE;
}
LTERM_LOG(ltermProcessXMLTermSequence,52,
("Switching to stream mode, codes=0x%x\n", streamOpcodes));
if (0 != ltermSwitchToStreamMode(lts, streamOpcodes, NULL))
return -1;
return 0;
default: /* Unknown escape sequence */
LTERM_WARNING("ltermProcessXMLTermSequence: Warning - unknown sequence %c\n",
termChar);
return 0;
}
return 0;
}
/** Insert/delete/erase COUNT characters at current output cursor position.
* @param action = LTERM_INSERT_ACTION (insert)
* LTERM_DELETE_ACTION (delete)
* LTERM_ERASE_ACTION (erase)
* @return 0 on success and -1 on error.
*/
int ltermInsDelEraseChar(struct lterms *lts, int count, int action)
{
struct LtermOutput *lto = &(lts->ltermOutput);
int charCount = count;
int j;
assert(count >= 0);
LTERM_LOG(ltermInsDelEraseChar,60,("count=%d, action=%d\n",
count, action));
if (lto->outputMode == LTERM2_LINE_MODE) {
/* Line mode */
switch (action) {
case LTERM_INSERT_ACTION:
if (lto->outputChars + charCount > MAXCOLM1) {
/* Output buffer overflow; ignore extra inserts */
LTERM_WARNING("ltermInsDelEraseChar: Warning - output line buffer overflow\n");
charCount = MAXCOLM1 - lto->outputChars;
}
LTERM_LOG(ltermInsDelEraseChar,62,("Line insert %d blank chars\n",
charCount));
/* Shift characters to the right to make room for insertion */
for (j=lto->outputChars-1; j>=lto->outputCursorChar; j--) {
lto->outputLine[j+charCount] = lto->outputLine[j];
lto->outputStyle[j+charCount] = lto->outputStyle[j];
}
/* Insert blank characters */
for (j=lto->outputCursorChar; j<lto->outputCursorChar+charCount; j++) {
lto->outputLine[j] = U_SPACE;
lto->outputStyle[j] = LTERM_STDOUT_STYLE | lto->styleMask;
}
/* Increment character count */
lto->outputChars += charCount;
break;
case LTERM_DELETE_ACTION:
if (lto->outputCursorChar+charCount > lto->outputChars)
charCount = lto->outputChars - lto->outputCursorChar;
LTERM_LOG(ltermInsDelEraseChar,62,("Line delete %d chars\n",
charCount));
/* Shift characters to the left */
for (j=lto->outputCursorChar; j<lto->outputChars-charCount; j++) {
lto->outputLine[j] = lto->outputLine[j+charCount];
lto->outputStyle[j] = lto->outputStyle[j+charCount];
}
/* Decrement character count */
lto->outputChars -= charCount;
break;
case LTERM_ERASE_ACTION:
if (lto->outputCursorChar+charCount > lto->outputChars)
charCount = lto->outputChars - lto->outputCursorChar;
LTERM_LOG(ltermInsDelEraseChar,62,("Line erase %d chars\n",
charCount));
/* Erase characters */
for (j=lto->outputCursorChar; j<lto->outputCursorChar+charCount; j++) {
lto->outputLine[j] = U_SPACE;
lto->outputStyle[j] = LTERM_STDOUT_STYLE | lto->styleMask;
}
break;
}
/* Note modifications */
if (lto->outputCursorChar < lto->outputModifiedChar)
lto->outputModifiedChar = lto->outputCursorChar;
} else if (lto->outputMode == LTERM1_SCREEN_MODE) {
/* Screen mode */
int j0 = lto->cursorRow*lts->nCols;
switch (action) {
case LTERM_INSERT_ACTION:
if (lto->cursorCol+charCount > lts->nCols) {
/* Ignore inserts beyond screen width */
LTERM_WARNING("ltermInsDelEraseChar: Warning - screen insert overflow\n");
charCount = lts->nCols - lto->cursorCol;
}
LTERM_LOG(ltermInsDelEraseChar,62,
("Screen insert %d blank chars at column %d\n",
charCount, lto->cursorCol));
if (charCount > 0) {
/* Shift characters to the right to make room for insertion */
for (j=lts->nCols-1+j0; j>=lto->cursorCol+charCount+j0; j--) {
lto->screenChar[j] = lto->screenChar[j-charCount];
lto->screenStyle[j] = lto->screenStyle[j-charCount];
}
/* Insert blank characters */
for (j=lto->cursorCol+j0; j<lto->cursorCol+charCount+j0; j++) {
lto->screenChar[j] = U_SPACE;
lto->screenStyle[j] = LTERM_STDOUT_STYLE | lto->styleMask;
}
/* Note modified column */
lto->modifiedCol[lto->cursorRow] = lts->nCols-1;
}
break;
case LTERM_DELETE_ACTION:
if (lto->cursorCol+charCount > lts->nCols)
charCount = lts->nCols - lto->cursorCol;
LTERM_LOG(ltermInsDelEraseChar,62,
("Screen delete %d chars at column %d\n",
charCount, lto->cursorCol));
if (charCount > 0) {
/* Shift characters to the left */
for (j=lto->cursorCol+j0; j<lts->nCols-charCount+j0; j++) {
lto->screenChar[j] = lto->screenChar[j+charCount];
lto->screenStyle[j] = lto->screenStyle[j+charCount];
}
/* Note modified column */
lto->modifiedCol[lto->cursorRow] = lts->nCols-1;
}
break;
case LTERM_ERASE_ACTION:
if (lto->cursorCol+charCount > lts->nCols)
charCount = lts->nCols - lto->cursorCol;
LTERM_LOG(ltermInsDelEraseChar,62,
("Screen erase %d chars at column %d\n",
charCount, lto->cursorCol));
if (charCount > 0) {
/* Erase characters */
for (j=lto->cursorCol+j0; j<lto->cursorCol+charCount+j0; j++) {
lto->screenChar[j] = U_SPACE;
lto->screenStyle[j] = LTERM_STDOUT_STYLE | lto->styleMask;
}
/* Note modified column */
if (lto->modifiedCol[lto->cursorRow] < lto->cursorCol+charCount-1)
lto->modifiedCol[lto->cursorRow] = lto->cursorCol+charCount-1;
}
break;
}
}
return 0;
}
/** Insert COUNT blank lines about current current line, scrolling down, or
* delete COUNT lines at and below current line, scrolling up remaining lines,
* or erase COUNT lines at and below current line.
* Displayed lines above the current line are unaffected,
* cursor is not moved and no new modification flags are set.
* @param count no. of lines to be inserted/deleted/erased
* @param row row for insertion/deletion/erasure
* @param action = LTERM_INSERT_ACTION (insert)
* LTERM_DELETE_ACTION (delete)
* LTERM_ERASE_ACTION (erase)
* @return 0 on success and -1 on error.
*/
int ltermInsDelEraseLine(struct lterms *lts, int count, int row, int action)
{
struct LtermOutput *lto = &(lts->ltermOutput);
int lineCount, kblank1, kblank2;
int joffset, jscroll, j, k;
LTERM_LOG(ltermInsDelEraseLine,60, ("count=%d, row=%d, action=%d\n",
count, row, action));
lineCount = count;
switch (action) {
case LTERM_ERASE_ACTION:
/* Erase lines down; no scrolling */
if (lineCount > row + 1)
lineCount = row + 1;
kblank1 = row-lineCount+1;
kblank2 = row;
break;
case LTERM_INSERT_ACTION:
/* Scroll down for insertion */
if ( (row < lto->botScrollRow) ||
(row > lto->topScrollRow) ) {
/* Cursor located outside scrollable region */
return 0;
}
if (lineCount > row - lto->botScrollRow + 1)
lineCount = row - lto->botScrollRow + 1;
kblank1 = row-lineCount+1;
kblank2 = row;
for (k=lto->botScrollRow; k<=row-lineCount; k++) {
joffset = k*lts->nCols;
jscroll = lineCount*lts->nCols;
lto->modifiedCol[k] = lto->modifiedCol[k+lineCount];
for (j=0+joffset; j<=lts->nCols-1+joffset; j++) {
lto->screenChar[j] = lto->screenChar[j+jscroll];
lto->screenStyle[j] = lto->screenStyle[j+jscroll];
}
}
break;
case LTERM_DELETE_ACTION:
/* Scroll up for deletion */
if ( (row < lto->botScrollRow) ||
(row > lto->topScrollRow) ) {
/* Cursor located outside scrollable region */
return 0;
}
if (lineCount > row - lto->botScrollRow + 1)
lineCount = row - lto->botScrollRow + 1;
kblank1 = lto->botScrollRow;
kblank2 = lto->botScrollRow + lineCount-1;
/* Scroll up */
for (k=row; k>=lto->botScrollRow+lineCount; k--) {
joffset = k*lts->nCols;
jscroll = lineCount*lts->nCols;
lto->modifiedCol[k] = lto->modifiedCol[k-lineCount];
for (j=0+joffset; j<=lts->nCols-1+joffset; j++) {
lto->screenChar[j] = lto->screenChar[j-jscroll];
lto->screenStyle[j] = lto->screenStyle[j-jscroll];
}
}
break;
default:
kblank1 = 0;
kblank2 = -1;
break;
}
/* Blank out lines (assumed to be displayed already) */
for (k=kblank1; k<=kblank2; k++) {
joffset = k*lts->nCols;
lto->modifiedCol[k] = -1;
for (j=0+joffset; j<=lts->nCols-1+joffset; j++) {
lto->screenChar[j] = U_SPACE;
lto->screenStyle[j] = LTERM_STDOUT_STYLE;
}
}
return 0;
}
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