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Add support for ESC[#X to VT100

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This escape sequence can be generated when using Powershell on
Windows (and possibly other places too) to erase number of
characters.

Change-Id: I32405f51a3f91fd8653d44f2676a5c85b696ef99
This commit is contained in:
coehlrich 2023-07-05 15:04:57 +12:00 • committed by Jonah Graham
parent 808147e174
commit 3240494e23
5 changed files with 51 additions and 2 deletions
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7
terminal/plugins/org.eclipse.tm.terminal.control/src/org/eclipse/tm/internal/terminal/emulator/IVT100EmulatorBackend.java
View file

@ -227,4 +227,11 @@ public interface IVT100EmulatorBackend {
* scroll region.
*/
void processReverseLineFeed();
/**
* Replaces characters from the cursor position with space characters.
*
* @param n number of characters to replace
*/
void eraseCharacters(int n);
}

5
terminal/plugins/org.eclipse.tm.terminal.control/src/org/eclipse/tm/internal/terminal/emulator/VT100BackendTraceDecorator.java
View file

@ -211,4 +211,9 @@ public class VT100BackendTraceDecorator implements IVT100EmulatorBackend {
fBackend.processReverseLineFeed();
}
@Override
public void eraseCharacters(int n) {
fWriter.println("eraseCharacters(" + n + ")"); //$NON-NLS-1$ //$NON-NLS-2$
fBackend.eraseCharacters(n);
}
}

10
terminal/plugins/org.eclipse.tm.terminal.control/src/org/eclipse/tm/internal/terminal/emulator/VT100Emulator.java
View file

@ -617,8 +617,7 @@ public class VT100Emulator implements ControlListener {
case 'X':
// Erase character.
// Emacs, vi, and GNU readline don't seem to use this command, so we ignore
// it for now.
processAnsiCommand_X();
break;
case 'Z':
@ -1238,6 +1237,13 @@ public class VT100Emulator implements ControlListener {
text.scrollDown(getAnsiParameter(0));
}
/**
* Erases n characters from cursor (default = 1 character)
*/
private void processAnsiCommand_X() {
text.eraseCharacters(getAnsiParameter(0));
}
private void processDecPrivateCommand_h() {
int param = getAnsiParameter(0);
switch (param) {

11
terminal/plugins/org.eclipse.tm.terminal.control/src/org/eclipse/tm/internal/terminal/emulator/VT100EmulatorBackend.java
View file

@ -490,4 +490,15 @@ public class VT100EmulatorBackend implements IVT100EmulatorBackend {
fTerminal.scroll(line, nLines, n);
}
}
@Override
public void eraseCharacters(int n) {
synchronized (fTerminal) {
int line = toAbsoluteLine(fCursorLine);
int end = Math.min(fCursorColumn + n, fColumns);
for (int col = fCursorColumn; col < end; col++) {
fTerminal.setChar(line, col, '\000', null);
}
}
}
}

20
terminal/plugins/org.eclipse.tm.terminal.test/src/org/eclipse/tm/internal/terminal/emulator/VT100EmulatorBackendTest.java
View file

@ -926,4 +926,24 @@ public class VT100EmulatorBackendTest extends TestCase {
assertEquals("ghi", new String(term.getChars(5)));
}
public void testEraseCharacters() {
ITerminalTextData term = makeITerminalTextData();
IVT100EmulatorBackend vt100 = makeBakend(term);
vt100.setDimensions(4, 4);
String s = "aaaa\n" + "bcde\n" + "1234\n" + "5678";
fill(term, s);
vt100.setCursor(0, 0);
vt100.eraseCharacters(1);
assertEqualsTerm(" aaa\n" + "bcde\n" + "1234\n" + "5678", toMultiLineText(term));
fill(term, s);
vt100.setCursor(1, 0);
vt100.eraseCharacters(1);
assertEqualsTerm("aaaa\n" + " cde\n" + "1234\n" + "5678", toMultiLineText(term));
fill(term, s);
vt100.setCursor(2, 1);
vt100.eraseCharacters(2);
assertEqualsTerm("aaaa\n" + "bcde\n" + "1 4\n" + "5678", toMultiLineText(term));
}
}