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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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12
Userland/Libraries/LibVT/Terminal.h
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@ -216,11 +216,15 @@ protected:
#ifndef KERNEL
void scroll_up(u16 region_top, u16 region_bottom, size_t count);
void scroll_down(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 put_character_at(unsigned row, unsigned column, u32 ch);
void clear_in_line(u16 row, u16 first_column, u16 last_column);
#else
virtual void scroll_up(u16 region_top, u16 region_bottom, size_t count) = 0;
virtual void scroll_down(u16 region_top, u16 region_bottom, size_t count) = 0;
virtual void scroll_left(u16 row, u16 column, size_t count) = 0;
virtual void scroll_right(u16 row, u16 column, size_t count) = 0;
virtual void put_character_at(unsigned row, unsigned column, u32 ch) = 0;
virtual void clear_in_line(u16 row, u16 first_column, u16 last_column) = 0;
#endif
@ -306,12 +310,8 @@ protected:
// DECSCUSR - Set Cursor Style
void DECSCUSR(Parameters);
#ifndef KERNEL
// ICH - Insert Character
void ICH(Parameters);
#else
virtual void ICH(Parameters) = 0;
#endif
// SU - Scroll Up (called "Pan Down" in VT510)
void SU(Parameters);
@ -322,12 +322,8 @@ protected:
// IL - Insert Line
void IL(Parameters);
#ifndef KERNEL
// DCH - Delete Character
void DCH(Parameters);
#else
virtual void DCH(Parameters) = 0;
#endif
// DL - Delete Line
void DL(Parameters);