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Allow users to adjust terminal transcript rows with termux.properties

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This `terminal-transcript-rows` key can be used to adjust the terminal transcript rows. The user can set an integer value between `100` and `50000`. The default value is still `2000`. So adding an entry like `terminal-transcript-rows=10000` to `termux.properties` file will allow users to scroll back ~10000 lines of command output. After updating the value, termux must be restarted. You can also run `termux-reload-settings` command so that termux loads the updated value, but only new sessions will use the updated value, existing sessions will not be affected.

You can test this with the following, where `70` is number of `x` characters per line and `10001` is the number of lines to print.
`x="$(printf 'x%.0s' {1..70})"; for i in {1..10001}; do echo "$i:$x"; done`

Be advised that using large values may have a performance impact depending on your device capabilities, so use at your own risk.

Closes #2071
This commit is contained in:
agnostic-apollo
2021-06-10 03:55:31 +05:00
parent e7dd0eeebe
commit 0b4bbaf23d
9 changed files with 128 additions and 21 deletions
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7
terminal-emulator/src/main/java/com/termux/terminal/TerminalSession.java
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@@ -74,14 +74,17 @@ public final class TerminalSession extends TerminalOutput {
private final String mCwd;
private final String[] mArgs;
private final String[] mEnv;
private final Integer mTranscriptRows;
private static final String LOG_TAG = "TerminalSession";
public TerminalSession(String shellPath, String cwd, String[] args, String[] env, TerminalSessionClient client) {
public TerminalSession(String shellPath, String cwd, String[] args, String[] env, Integer transcriptRows, TerminalSessionClient client) {
this.mShellPath = shellPath;
this.mCwd = cwd;
this.mArgs = args;
this.mEnv = env;
this.mTranscriptRows = transcriptRows;
this.mClient = client;
}
@@ -118,7 +121,7 @@ public final class TerminalSession extends TerminalOutput {
* @param rows The number of rows in the terminal window.
*/
public void initializeEmulator(int columns, int rows) {
mEmulator = new TerminalEmulator(this, columns, rows, /* transcript= */2000, mClient);
mEmulator = new TerminalEmulator(this, columns, rows, mTranscriptRows, mClient);
int[] processId = new int[1];
mTerminalFileDescriptor = JNI.createSubprocess(mShellPath, mCwd, mArgs, mEnv, processId, rows, columns);