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Kernel+LibVT: Fix selection with scrollback wrap-around

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If lines are removed from the tail of the scrollback buffer, the
previous line indices will refer to different lines; therefore we need
to offset them.
This commit is contained in:
Daniel Bertalan 2021-06-05 16:46:33 +02:00 • committed by Andreas Kling
parent 13991eade7
commit ce9460de59
7 changed files with 23 additions and 10 deletions
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7
Userland/Libraries/LibVT/Terminal.h
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@ -45,7 +45,7 @@ public:
virtual void set_window_title(const StringView&) = 0;
virtual void set_window_progress(int value, int max) = 0;
virtual void terminal_did_resize(u16 columns, u16 rows) = 0;
virtual void terminal_history_changed() = 0;
virtual void terminal_history_changed(int delta) = 0;
virtual void emit(const u8*, size_t) = 0;
virtual void set_cursor_style(CursorStyle) = 0;
};
@ -141,10 +141,11 @@ public:
void set_max_history_size(size_t value)
{
if (value == 0) {
auto previous_size = m_history.size();
m_max_history_lines = 0;
m_history_start = 0;
m_history.clear();
m_client.terminal_history_changed();
m_client.terminal_history_changed(-previous_size);
return;
}
@ -158,7 +159,7 @@ public:
}
m_history = move(new_history);
m_history_start = 0;
m_client.terminal_history_changed();
m_client.terminal_history_changed(value - existing_line_count);
}
m_max_history_lines = value;
}