termpty: cell is empty if bg is invisible. Closes T7707

src/bin/termpty.c

@@ -848,13 +848,10 @@ termpty_free(Termpty *ty)
 static Eina_Bool
 _termpty_cell_is_empty(const Termcell *cell)
 {
-   if ((cell->codepoint != 0) &&
-       (!cell->att.invisible) &&
-       (cell->att.fg != COL_INVIS))
-     {
-        return EINA_FALSE;
-     }
-   return EINA_TRUE;
+   return (((cell->codepoint == 0) ||
+        (cell->att.invisible) ||
+        (cell->att.fg == COL_INVIS)) &&
+       (cell->att.bg == COL_INVIS));
 }
 
 static Eina_Bool

tests/cell_is_empty.sh

@@ -0,0 +1,30 @@
+#!/bin/sh
+
+# char width: 7
+# char height: 15
+
+# clear screen
+printf '\033[2J'
+
+# set color
+printf '\033[46;31;3m'
+
+#move to 8;8
+printf '\033[8;8H#'
+#move to 8;40
+printf '\033[8;40H#'
+#switch to altbuf
+printf '\033[?1049h'
+
+# change colors
+printf '\033[m\033[37m\033[40m'
+# move to 0;0
+printf '\033[H'
+# clear screen
+printf '\033[2J'
+# change colors
+printf '\033[37m\033[40m\033[97m\033[40m'
+# move
+printf '\033[3;2H'
+# text
+printf '**\o/**'

tests/tests.results

@@ -77,6 +77,7 @@ uts.sh 075ff9f8c4f718784330bac4fcae932b
 vpa.sh 4614f3c337e9d47fed3a4233df719617
 decswbv.sh f90ffe93b1bd99c6b7385ca71c6793de
 c2.sh 9f264ee84b6d89f1f9fa7b76abd442c0
+cell_is_empty.sh 507bc5dca92d6f0d4c081a5146c13ed6
 selection_simple.sh 1b3a915bf40ba8e869021055d368edf2
 selection_box_simple.sh 1b3a915bf40ba8e869021055d368edf2
 selection_all_directions.sh ad1c5bf43f0ec9a921616c3da10cab7f