diff options
| -rw-r--r-- | src/libsystemd-terminal/term-screen.c | 62 |
1 files changed, 60 insertions, 2 deletions
diff --git a/src/libsystemd-terminal/term-screen.c b/src/libsystemd-terminal/term-screen.c index 145dcdaee..f9352ad94 100644 --- a/src/libsystemd-terminal/term-screen.c +++ b/src/libsystemd-terminal/term-screen.c @@ -370,6 +370,26 @@ static inline void set_reset(term_screen *screen, unsigned int flag, bool set) { screen->flags &= ~flag; } +static int screen_DECSC(term_screen *screen, const term_seq *seq); +static int screen_DECRC(term_screen *screen, const term_seq *seq); + +static inline void screen_clear_alt(term_screen *screen) { + term_page_set_scroll_region(screen->page_alt, 0, screen->page->height); + term_page_erase(screen->page_alt, 0, 0, screen->page->width, screen->page->height, &screen->attr, screen->age, false); +} + +static inline void screen_set_alt(term_screen *screen, bool set) { + if (set) { + screen->page = screen->page_alt; + screen->history = NULL; + } else { + screen->page = screen->page_main; + screen->history = screen->history_main; + } + + screen->page->age = screen->age; +} + static void screen_mode_change(term_screen *screen, unsigned int mode, bool dec, bool set) { switch (mode) { case 1: @@ -423,6 +443,44 @@ static void screen_mode_change(term_screen *screen, unsigned int mode, bool dec, } break; + case 47: + if (dec) + screen_set_alt(screen, set); + + break; + case 1047: + if (dec) { + if (!set) + screen_clear_alt(screen); + + screen_set_alt(screen, set); + } + + break; + case 1048: + if (dec) { + if (set) + screen_DECSC(screen, seq); + else + screen_DECRC(screen, seq); + } + + break; + case 1049: + if (dec) { + /* TODO: should DEC{S,R}C be done per-page, rather than per-screen? */ + if (set) { + screen_DECSC(screen, seq); + screen_clear_alt(screen); + } + + screen_set_alt(screen, set); + + if (!set) + screen_DECRC(screen, seq); + } + + break; } } @@ -1235,7 +1293,7 @@ static int screen_DECRARA(term_screen *screen, const term_seq *seq) { return 0; } -static int screen_DECRC(term_screen *screen, const term_seq *seq) { +int screen_DECRC(term_screen *screen, const term_seq *seq) { /* * DECRC - restore-cursor * Restores the terminal to the state saved by the save cursor (DECSC) @@ -1454,7 +1512,7 @@ static int screen_DECSASD(term_screen *screen, const term_seq *seq) { return 0; } -static int screen_DECSC(term_screen *screen, const term_seq *seq) { +int screen_DECSC(term_screen *screen, const term_seq *seq) { /* * DECSC - save-cursor * Save cursor and terminal state so it can be restored later on. |