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 <kilobyte@angband.pl>
Acked-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/tty/vt/selection.c b/drivers/tty/vt/selection.c
index 69ca337..07496c7 100644
--- a/drivers/tty/vt/selection.c
+++ b/drivers/tty/vt/selection.c
@@ -57,11 +57,13 @@
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 @@
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 @@
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 846dfed..7adcb6d 100644
--- a/drivers/tty/vt/vt.c
+++ b/drivers/tty/vt/vt.c
@@ -4543,6 +4543,16 @@
}
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 067d2e9..a8f5b97 100644
--- a/include/linux/selection.h
+++ b/include/linux/selection.h
@@ -32,6 +32,7 @@
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);