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-rw-r--r--tests/textDisp.test35
1 files changed, 35 insertions, 0 deletions
diff --git a/tests/textDisp.test b/tests/textDisp.test
index 44a45b2..12a20c6 100644
--- a/tests/textDisp.test
+++ b/tests/textDisp.test
@@ -1152,6 +1152,41 @@ test textDisp-8.11 {TkTextChanged, scrollbar notification when changes are off-s
.t configure -yscrollcommand ""
set scrollInfo
} {0.0 0.625}
+test textDisp-8.12 {TkTextChanged, moving the insert cursor redraws only past and new lines} {
+ .t delete 1.0 end
+ .t configure -wrap none
+ for {set i 1} {$i < 25} {incr i} {
+ .t insert end "Line $i Line $i\n"
+ }
+ .t tag add hidden 5.0 8.0
+ .t tag configure hidden -elide true
+ .t mark set insert 9.0
+ update
+ .t mark set insert 8.0 ; # up one line
+ update
+ set res [list $tk_textRedraw]
+ .t mark set insert 12.2 ; # in the visible text
+ update
+ lappend res $tk_textRedraw
+ .t mark set insert 6.5 ; # in the hidden text
+ update
+ lappend res $tk_textRedraw
+ .t mark set insert 3.5 ; # in the visible text again
+ update
+ lappend res $tk_textRedraw
+ .t mark set insert 3.8 ; # within the same line
+ update
+ lappend res $tk_textRedraw
+ # This last one is tricky: correct result really is {2.0 3.0} when
+ # calling .t mark set insert, two calls to TkTextChanged are done:
+ # (a) to redraw the line of the past position of the cursor
+ # (b) to redraw the line of the new position of the cursor
+ # During (a) the display line showing the cursor gets unlinked,
+ # which leads TkTextChanged in (b) to schedule a redraw starting
+ # one line _before_ the line containing the insert cursor. This is
+ # because during (b) findDLine cannot return the display line the
+ # cursor is in since this display line was just unlinked in (a).
+} {{8.0 9.0} {8.0 12.0} {8.0 12.0} {3.0 8.0} {2.0 3.0}}
test textDisp-9.1 {TkTextRedrawTag} {
.t configure -wrap char