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patch 9.0.0592: display not cleared when scrolling back in messages

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Problem:    Display not cleared when scrolling back in messages, a background
            color is set and t_ut is empty.
Solution:   Clear to the end of the display if needed. (closes #8973)
This commit is contained in:
Bram Moolenaar
2022-09-26 15:19:56 +01:00
parent 4569020538
commit 838b746cce
7 changed files with 75 additions and 12 deletions
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19
src/screen.c
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@@ -49,7 +49,7 @@
static int screen_attr = 0;
static void screen_char_2(unsigned off, int row, int col);
static void screenclear2(int doclear);
static int screenclear2(int doclear);
static void lineclear(unsigned off, int width, int attr);
static void lineinvalid(unsigned off, int width);
static int win_do_lines(win_T *wp, int row, int line_count, int mayclear, int del, int clear_attr);
@@ -2473,6 +2473,7 @@ screen_fill(
|| (enc_utf8 && (int)ScreenLinesUC[off]
!= (c >= 0x80 ? c : 0))
|| ScreenAttrs[off] != attr
|| must_redraw == UPD_CLEAR // screen clear pending
#if defined(FEAT_GUI) || defined(UNIX)
|| force_next
#endif
@@ -2975,13 +2976,15 @@ free_screenlines(void)
* Clear the screen.
* May delay if there is something the user should read.
* Allocated the screen for resizing if needed.
* Returns TRUE when the screen was actually claared, FALSE if all display
* cells were marked for updating.
*/
void
int
screenclear(void)
{
check_for_delay(FALSE);
screenalloc(FALSE); // allocate screen buffers if size changed
screenclear2(TRUE); // clear the screen
screenalloc(FALSE); // allocate screen buffers if size changed
return screenclear2(TRUE); // clear the screen
}
/*
@@ -2993,17 +2996,18 @@ redraw_as_cleared(void)
screenclear2(FALSE);
}
static void
static int
screenclear2(int doclear)
{
int i;
int did_clear = FALSE;
if (starting == NO_SCREEN || ScreenLines == NULL
#ifdef FEAT_GUI
|| (gui.in_use && gui.starting)
#endif
)
return;
return FALSE;
#ifdef FEAT_GUI
if (!gui.in_use)
@@ -3026,6 +3030,7 @@ screenclear2(int doclear)
if (doclear && can_clear(T_CL))
{
out_str(T_CL); // clear the display
did_clear = TRUE;
clear_cmdline = FALSE;
mode_displayed = FALSE;
}
@@ -3054,6 +3059,8 @@ screenclear2(int doclear)
screen_start(); // don't know where cursor is now
msg_didany = FALSE;
msg_didout = FALSE;
return did_clear;
}
/*