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Kernel+LibVT: Implement left-right scrolling

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This commit implements the left/right scrolling used in the `ICH`/`DCH`
escape sequences for `VirtualConsole`. This brings us one step closer to
VT420/xterm compatibility.

We can now finally remove the last escape sequence related `ifdef`s.
This commit is contained in:
Daniel Bertalan 2021-06-05 15:11:45 +02:00 • committed by Andreas Kling
parent 7419569a2b
commit 89843cd692
4 changed files with 68 additions and 43 deletions
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7
Kernel/TTY/VirtualConsole.h
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@ -39,11 +39,10 @@ private:
virtual void scroll_up(u16 region_top, u16 region_bottom, size_t count) override;
virtual void scroll_down(u16 region_top, u16 region_bottom, size_t count) override;
virtual void scroll_left(u16 row, u16 column, size_t count) override;
virtual void scroll_right(u16 row, u16 column, size_t count) override;
virtual void put_character_at(unsigned row, unsigned column, u32 ch) override;
virtual void clear_in_line(u16 row, u16 first_column, u16 last_column) override;
virtual void ICH(Parameters) override;
virtual void DCH(Parameters) override;
};
class VirtualConsole final : public TTY
@ -138,6 +137,8 @@ private:
void scroll_down(u16 region_top, u16 region_bottom, size_t count);
void scroll_up(u16 region_top, u16 region_bottom, size_t count);
void scroll_left(u16 row, u16 column, size_t count);
void scroll_right(u16 row, u16 column, size_t count);
void clear_line(size_t index)
{
clear_in_line(index, 0, m_console_impl.columns() - 1);