From 9bfdc2611d417be453c3deb7a7ef2ffc718febfa Mon Sep 17 00:00:00 2001 From: Adam Borowski Date: Wed, 18 Jul 2018 04:10:44 +0200 Subject: vt: selection: take screen contents from uniscr if available This preserves whatever was written even if we can't currently display the given glyph. Mouse paste won't corrupt any character of wcwidth() == 1 anymore. Note that for now uniscr doesn't get allocated until something reads /dev/vcsuN for that console, making this code dormant for most users. Signed-off-by: Adam Borowski Acked-by: Nicolas Pitre Signed-off-by: Greg Kroah-Hartman --- drivers/tty/vt/selection.c | 11 +++++++---- drivers/tty/vt/vt.c | 10 ++++++++++ include/linux/selection.h | 1 + 3 files changed, 18 insertions(+), 4 deletions(-) diff --git a/drivers/tty/vt/selection.c b/drivers/tty/vt/selection.c index 69ca337d3220..07496c711d7d 100644 --- a/drivers/tty/vt/selection.c +++ b/drivers/tty/vt/selection.c @@ -57,11 +57,13 @@ static inline void highlight_pointer(const int where) complement_pos(sel_cons, where); } -static u16 +static u32 sel_pos(int n) { + if (use_unicode) + return screen_glyph_unicode(sel_cons, n / 2); return inverse_translate(sel_cons, screen_glyph(sel_cons, n), - use_unicode); + 0); } /** @@ -90,7 +92,8 @@ static u32 inwordLut[]={ 0x07FFFFFE, /* lowercase */ }; -static inline int inword(const u16 c) { +static inline int inword(const u32 c) +{ return c > 0x7f || (( inwordLut[c>>5] >> (c & 0x1F) ) & 1); } @@ -167,7 +170,7 @@ int set_selection(const struct tiocl_selection __user *sel, struct tty_struct *t struct tiocl_selection v; char *bp, *obp; int i, ps, pe, multiplier; - u16 c; + u32 c; int mode; poke_blanked_console(); diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c index 846dfedb657d..7adcb6dcc50c 100644 --- a/drivers/tty/vt/vt.c +++ b/drivers/tty/vt/vt.c @@ -4543,6 +4543,16 @@ u16 screen_glyph(struct vc_data *vc, int offset) } EXPORT_SYMBOL_GPL(screen_glyph); +u32 screen_glyph_unicode(struct vc_data *vc, int n) +{ + struct uni_screen *uniscr = get_vc_uniscr(vc); + + if (uniscr) + return uniscr->lines[n / vc->vc_cols][n % vc->vc_cols]; + return inverse_translate(vc, screen_glyph(vc, n * 2), 1); +} +EXPORT_SYMBOL_GPL(screen_glyph_unicode); + /* used by vcs - note the word offset */ unsigned short *screen_pos(struct vc_data *vc, int w_offset, int viewed) { diff --git a/include/linux/selection.h b/include/linux/selection.h index 067d2e99c79f..a8f5b97b216f 100644 --- a/include/linux/selection.h +++ b/include/linux/selection.h @@ -32,6 +32,7 @@ extern unsigned char default_blu[]; extern unsigned short *screen_pos(struct vc_data *vc, int w_offset, int viewed); extern u16 screen_glyph(struct vc_data *vc, int offset); +extern u32 screen_glyph_unicode(struct vc_data *vc, int offset); extern void complement_pos(struct vc_data *vc, int offset); extern void invert_screen(struct vc_data *vc, int offset, int count, int shift); -- cgit v1.2.3-59-g8ed1b