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Fix tabs to not overwrite cells

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This commit is contained in:
Fredrik Fornwall
2016-02-25 16:33:00 +01:00
parent ce7ad530cd
commit 6ca055bb25
4 changed files with 30 additions and 17 deletions
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31
app/src/main/java/com/termux/terminal/TerminalEmulator.java
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@@ -425,9 +425,9 @@ public final class TerminalEmulator {
processCodePoint((codePoint & 0x7F) + 0x40);
} else {
switch (Character.getType(codePoint)) {
case Character.UNASSIGNED:
case Character.SURROGATE:
codePoint = UNICODE_REPLACEMENT_CHAR;
case Character.UNASSIGNED:
case Character.SURROGATE:
codePoint = UNICODE_REPLACEMENT_CHAR;
}
processCodePoint(codePoint);
}
@@ -474,16 +474,19 @@ public final class TerminalEmulator {
else
mSession.onBell();
break;
case 8: // BS
setCursorCol(Math.max(mLeftMargin, mCursorCol - 1));
break;
case 9: // Horizontal tab - move to next tab stop, but not past edge of screen
int nextTabStop = nextTabStop(1);
while (mCursorCol < nextTabStop) {
// Emit newlines to get background color right.
processCodePoint(' ');
}
break;
case 8: // Backspace (BS, ^H).
setCursorCol(Math.max(mLeftMargin, mCursorCol - 1));
break;
case 9: // Horizontal tab (HT, \t) - move to next tab stop, but not past edge of screen
// XXX: Should perhaps use color if writing to new cells. Try with
// printf "\033[41m\tXX\033[0m\n"
// The OSX Terminal.app colors the spaces from the tab red, but xterm does not.
// Note that Terminal.app only colors on new cells, in e.g.
// printf "\033[41m\t\r\033[42m\tXX\033[0m\n"
// the first cells are created with a red background, but when tabbing over
// them again with a green background they are not overwritten.
mCursorCol = nextTabStop(1);
break;
case 10: // Line feed (LF, \n).
case 11: // Vertical tab (VT, \v).
case 12: // Form feed (FF, \f).
@@ -1331,7 +1334,7 @@ public final class TerminalEmulator {
continueSequence(ESC_CSI_ARGS_ASTERIX);
break;
case '@': {
// "CSI{n}@" - Insert ${n} space characters (ICH) - http://www.vt100.net/docs/vt510-rm/ICH.
// "CSI{n}@" - Insert ${n} space characters (ICH) - http://www.vt100.net/docs/vt510-rm/ICH.
mAboutToAutoWrap = false;
int columnsAfterCursor = mColumns - mCursorCol;
int spacesToInsert = Math.min(getArg0(1), columnsAfterCursor);