nix-community/nix-on-droid-app
1
0
Fork 0
mirror of https://github.com/nix-community/nix-on-droid-app.git synced 2025-12-07 17:41:08 +01:00
Code Issues Projects Releases Packages Wiki Activity Actions

Fix crash with wide character in last column

Browse source 
Ignore wide character outputs instead of crashing when the cursor
is in the last column with autowrap disabled.
This commit is contained in:
Fredrik Fornwall 2015-11-29 10:04:50 +01:00
parent 4ccc703fcf
commit b54c7909bd
2 changed files with 22 additions and 7 deletions
Download patch file Download diff file Expand all files Collapse all files

21
app/src/main/java/com/termux/terminal/TerminalEmulator.java
View file

@ -2156,15 +2156,22 @@ public final class TerminalEmulator {
final boolean autoWrap = isDecsetInternalBitSet(DECSET_BIT_AUTOWRAP);
final int displayWidth = WcWidth.width(codePoint);
final boolean cursorInLastColumn = mCursorCol == mRightMargin - 1;
if (autoWrap && (mCursorCol == mRightMargin - 1 && ((mAboutToAutoWrap && displayWidth == 1) || displayWidth == 2))) {
mScreen.setLineWrap(mCursorRow);
mCursorCol = mLeftMargin;
if (mCursorRow + 1 < mBottomMargin) {
mCursorRow++;
} else {
scrollDownOneLine();
if (autoWrap) {
if (cursorInLastColumn && ((mAboutToAutoWrap && displayWidth == 1) || displayWidth == 2)) {
mScreen.setLineWrap(mCursorRow);
mCursorCol = mLeftMargin;
if (mCursorRow + 1 < mBottomMargin) {
mCursorRow++;
} else {
scrollDownOneLine();
}
}
} else if (cursorInLastColumn && displayWidth == 2) {
// The behaviour when a wide character is output with cursor in the last column when
// autowrap is disabled is not obvious - it's ignored here.
return;
}
if (mInsertMode && displayWidth > 0) {

8
app/src/test/java/com/termux/terminal/UnicodeInputTest.java
View file

@ -84,4 +84,12 @@ public class UnicodeInputTest extends TerminalTestCase {
assertLineIs(0, "\uFFFDY ");
}
public void testWideCharacterWithoutWrapping() throws Exception {
// With wraparound disabled. The behaviour when a wide character is output with cursor in
// the last column when autowrap is disabled is not obvious, but we expect the wide
// character to be ignored here.
withTerminalSized(3, 3).enterString("\033[?7l").enterString("枝枝枝").assertLinesAre("枝 ", " ", " ");
enterString("a枝").assertLinesAre("枝a", " ", " ");
}
}