Merge bug fixes from fvogel's text-elided branch

2 files changed, 368 insertions, 14 deletions

diff --git a/tests/text.test b/tests/text.test
index 5089bb1..d8d01a0 100644
--- a/tests/text.test
+++ b/tests/text.test
@@ -2632,7 +2632,65 @@ test text-10.39 {TextWidgetCmd procedure, "count" option} -setup {
     lappend res [.t count -displaylines 1.19 3.24] [.t count -displaylines 1.0 end]
 } -cleanup {
     destroy .t
-} -result {2 6 2 5}
+} -result {2 6 1 5}
+test text-9.2.45 {TextWidgetCmd procedure, "count" option} -setup {
+    text .t
+    pack .t
+    update
+    set res {}
+} -body {
+    for {set i 1} {$i < 5} {incr i} {
+      .t insert end "Line $i+++Line $i---Line $i///Line $i - This is Line [format %c [expr 64+$i]]\n"
+    }
+    .t tag configure hidden -elide true
+    .t tag add hidden 2.15 3.10
+    .t configure -wrap none
+    set res [.t count -displaylines 2.0 3.0]
+} -cleanup {
+    destroy .t
+} -result {0}
+test text-9.2.46 {TextWidgetCmd procedure, "count" option} -setup {
+    toplevel .mytop
+    pack [text .mytop.t]
+    wm geometry .mytop 100x300+0+0
+    .mytop.t delete 1.0 end
+    update
+    set res {}
+} -body {
+    for {set i 1} {$i < 5} {incr i} {
+      #              0          1          2          3          4
+      #              012345 678901234 567890123 456789012 34567890123456789
+      .mytop.t insert end "Line $i+++Line $i---Line $i///Line $i - This is Line [format %c [expr 64+$i]]\n"
+    }
+    .mytop.t tag configure hidden -elide true
+    .mytop.t tag add hidden 2.15 3.10
+    .mytop.t configure -wrap char
+    lappend res [.mytop.t count -displaylines 2.0 3.0]
+    lappend res [.mytop.t count -displaylines 2.0 3.40]
+} -cleanup {
+    destroy .mytop
+} -result {1 3}
+test text-9.2.47 {TextWidgetCmd procedure, "count" option} -setup {
+    text .t
+    pack .t
+    update
+    set res {}
+} -body {
+    for {set i 1} {$i < 25} {incr i} {
+        .t insert end "Line $i\n"
+    }
+    .t tag configure hidden -elide true
+    .t tag add hidden 5.7 11.0
+    update
+    set y1 [lindex [.t yview] 1]
+    .t count -displaylines 5.0 11.0
+    set y2 [lindex [.t yview] 1]
+    .t count -displaylines 5.0 12.0
+    set y3 [lindex [.t yview] 1]
+    list [expr {$y1 == $y2}] [expr {$y1 == $y3}]
+} -cleanup {
+    destroy .t
+} -result {1 1}
 
 
 test text-11.1 {counting with tag priority eliding} -setup {
diff --git a/tests/textDisp.test b/tests/textDisp.test
index 70c7208..12a20c6 100644
--- a/tests/textDisp.test
+++ b/tests/textDisp.test
@@ -537,20 +537,24 @@ test textDisp-4.1 {UpdateDisplayInfo, basic} {textfonts} {
     .t insert end "Line 1\nLine 2\nLine 3\n"
     update
     .t delete 2.0 2.end
+    update
+    set res $tk_textRelayout
     .t insert 2.0 "New Line 2"
     update
-    list [.t bbox 1.0] [.t bbox 2.0] [.t bbox 3.0] $tk_textRelayout
-} [list [list 5 5 7 $fixedHeight] [list 5 [expr {$fixedDiff + 18}] 7 $fixedHeight] [list 5 [expr {2*$fixedDiff + 31}] 7 $fixedHeight] 2.0]
+    lappend res [.t bbox 1.0] [.t bbox 2.0] [.t bbox 3.0] $tk_textRelayout
+} [list 2.0 [list 5 5 7 $fixedHeight] [list 5 [expr {$fixedDiff + 18}] 7 $fixedHeight] [list 5 [expr {2*$fixedDiff + 31}] 7 $fixedHeight] 2.0]
 test textDisp-4.2 {UpdateDisplayInfo, re-use tail of text line} {textfonts} {
     .t delete 1.0 end
     .t insert end "Line 1\nLine 2 is so long that it wraps around\nLine 3"
     update
     .t mark set x 2.21
     .t delete 2.2
+    update
+    set res $tk_textRelayout
     .t insert 2.0 X
     update
-    list [.t bbox 2.0] [.t bbox x] [.t bbox 3.0] $tk_textRelayout
-} [list [list 5 [expr {$fixedDiff + 18}] 7 $fixedHeight] [list 12 [expr {2*$fixedDiff + 31}] 7 $fixedHeight] [list 5 [expr {3*$fixedDiff + 44}] 7 $fixedHeight] {2.0 2.20}]
+    lappend res [.t bbox 2.0] [.t bbox x] [.t bbox 3.0] $tk_textRelayout
+} [list 2.0 2.20 [list 5 [expr {$fixedDiff + 18}] 7 $fixedHeight] [list 12 [expr {2*$fixedDiff + 31}] 7 $fixedHeight] [list 5 [expr {3*$fixedDiff + 44}] 7 $fixedHeight] {2.0 2.20}]
 test textDisp-4.3 {UpdateDisplayInfo, tail of text line shifts} {textfonts} {
     .t delete 1.0 end
     .t insert end "Line 1\nLine 2 is so long that it wraps around\nLine 3"
@@ -1148,6 +1152,41 @@ test textDisp-8.11 {TkTextChanged, scrollbar notification when changes are off-s
     .t configure -yscrollcommand ""
     set scrollInfo
 } {0.0 0.625}
+test textDisp-8.12 {TkTextChanged, moving the insert cursor redraws only past and new lines} {
+    .t delete 1.0 end
+    .t configure -wrap none
+    for {set i 1} {$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
@@ -1173,40 +1212,44 @@ test textDisp-9.3 {TkTextRedrawTag} {
     .t insert 1.0 "Line 1\nLine 2 is long enough to wrap around\nLine 3\nLine 4"
     update
     .t tag add big 2.2 2.4
+    update
     .t tag remove big 1.0 end
     update
     list $tk_textRelayout $tk_textRedraw
-} {2.0 2.0}
+} {{2.0 2.20} {2.0 2.20 eof}}
 test textDisp-9.4 {TkTextRedrawTag} {
     .t configure -wrap char
     .t delete 1.0 end
     .t insert 1.0 "Line 1\nLine 2 is long enough to wrap around\nLine 3\nLine 4"
     update
     .t tag add big 2.2 2.20
+    update
     .t tag remove big 1.0 end
     update
     list $tk_textRelayout $tk_textRedraw
-} {2.0 2.0}
+} {{2.0 2.20} {2.0 2.20 eof}}
 test textDisp-9.5 {TkTextRedrawTag} {
     .t configure -wrap char
     .t delete 1.0 end
     .t insert 1.0 "Line 1\nLine 2 is long enough to wrap around\nLine 3\nLine 4"
     update
     .t tag add big 2.2 2.end
+    update
     .t tag remove big 1.0 end
     update
     list $tk_textRelayout $tk_textRedraw
-} {{2.0 2.20} {2.0 2.20}}
+} {{2.0 2.20} {2.0 2.20 eof}}
 test textDisp-9.6 {TkTextRedrawTag} {
     .t configure -wrap char
     .t delete 1.0 end
-    .t insert 1.0 "Line 1\nLine 2 is long enough to wrap\nLine 3 is also long enough to wrap\nLine 4"
+    .t insert 1.0 "Line 1\nLine 2 is long enough to wrap\nLine 3 is also long enough to wrap"
     update
     .t tag add big 2.2 3.5
+    update
     .t tag remove big 1.0 end
     update
     list $tk_textRelayout $tk_textRedraw
-} {{2.0 2.20 3.0} {2.0 2.20 3.0}}
+} {{2.0 2.20 3.0 3.20} {2.0 2.20 3.0 3.20 eof}}
 test textDisp-9.7 {TkTextRedrawTag} {
     .t configure -wrap char
     .t delete 1.0 end
@@ -1258,6 +1301,34 @@ test textDisp-9.11 {TkTextRedrawTag} {
     update
     set tk_textRedraw
 } {}
+test textDisp-9.12 {TkTextRedrawTag} {
+    .t configure -wrap char
+    .t delete 1.0 end
+    for {set i 1} {$i < 5} {incr i} {
+      .t insert end "Line $i+++Line $i\n"
+    }
+    .t tag configure hidden -elide true
+    .t tag add hidden 2.6 3.6
+    update
+    .t tag add hidden 3.11 4.6
+    update
+    list $tk_textRelayout $tk_textRedraw
+} {2.0 {2.0 eof}}
+test textDisp-9.13 {TkTextRedrawTag} {
+    .t configure -wrap none
+    .t delete 1.0 end
+    for {set i 1} {$i < 10} {incr i} {
+        .t insert end "Line $i - This is Line [format %c [expr 64+$i]]\n"
+    }
+    .t tag add hidden 2.8 2.17
+    .t tag add hidden 6.8 7.17
+    .t tag configure hidden -background red
+    .t tag configure hidden -elide true
+    update
+    .t tag configure hidden -elide false
+    update
+    list $tk_textRelayout $tk_textRedraw
+} {{2.0 6.0 7.0} {2.0 6.0 7.0}}
 
 test textDisp-10.1 {TkTextRelayoutWindow} {
     .t configure -wrap char
@@ -1426,7 +1497,7 @@ test textDisp-11.15 {TkTextSetYView, only a few lines visible} {
     update
     .top.t see 11.0
     .top.t index @0,0
-    # Thie index 9.0 should be just visible by a couple of pixels
+    # The index 9.0 should be just visible by a couple of pixels
 } {9.0}
 test textDisp-11.16 {TkTextSetYView, only a few lines visible} {
     .top.t yview 8.0
@@ -1439,9 +1510,54 @@ test textDisp-11.17 {TkTextSetYView, only a few lines visible} {
     update
     .top.t see 4.0
     .top.t index @0,0
-    # Thie index 2.0 should be just visible by a couple of pixels
+    # The index 2.0 should be just visible by a couple of pixels
 } {2.0}
-destroy .top
+test textDisp-11.18 {TkTextSetYView, see in elided lines} {
+    .top.t delete 1.0 end
+    for {set i 1} {$i < 20} {incr i} {
+        .top.t insert end [string repeat "Line $i" 10]
+        .top.t insert end "\n"
+    }
+    .top.t yview 4.0
+    .top.t tag add hidden 4.10 "4.10 lineend"
+    .top.t tag add hidden 5.15 10.3
+    .top.t tag configure hidden -elide true
+    update
+    .top.t see "8.0 lineend"
+    # The index "8.0 lineend" is on screen despite elided -> no scroll
+    .top.t index @0,0
+} {4.0}
+test textDisp-11.19 {TkTextSetYView, see in elided lines} {
+    .top.t delete 1.0 end
+    for {set i 1} {$i < 50} {incr i} {
+        .top.t insert end "Line $i\n"
+    }
+    # button just for having a line with a larger height
+    button .top.t.b -text "Test" -bd 2 -highlightthickness 2
+    .top.t window create 21.0 -window .top.t.b
+    .top.t tag add hidden 15.36 21.0
+    .top.t tag configure hidden -elide true
+    .top.t configure -height 15
+    wm geometry .top 300x200+0+0
+    # Indices 21.0, 17.0 and 15.0 are all on the same display line
+    # therefore index @0,0 shall be the same for all of them
+    .top.t see end
+    update
+    .top.t see 21.0
+    update
+    set ind1 [.top.t index @0,0]
+    .top.t see end
+    update
+    .top.t see 17.0
+    update
+    set ind2 [.top.t index @0,0]
+    .top.t see end
+    update
+    .top.t see 15.0
+    update
+    set ind3 [.top.t index @0,0]
+    list [expr {$ind1 == $ind2}] [expr {$ind1 == $ind3}]
+} {1 1}
 
 .t configure -wrap word
 .t delete 50.0 51.0
@@ -1583,6 +1699,29 @@ test textDisp-13.10 {TkTextSeeCmd procedure} {} {
     destroy $w
     set res
 } {}
+test textDisp-13.11 {TkTextSeeCmd procedure} {} {
+    # insertion of a character at end of a line containing multi-byte
+    # characters and calling see at the line end shall actually show
+    # this character
+    toplevel .top2
+    pack [text .top2.t2 -wrap none]
+    for {set i 1} {$i < 5} {incr i} {
+        .top2.t2 insert end [string repeat "Line $i: éèàçù" 5]\n
+
+    }
+    wm geometry .top2 300x200+0+0
+    update
+    .top2.t2 see "1.0 lineend"
+    update
+    set ref [.top2.t2 index @0,0]
+    .top2.t2 insert "1.0 lineend" ç
+    .top2.t2 see "1.0 lineend"
+    update
+    set new [.top2.t2 index @0,0]
+    set res [.top2.t2 compare $ref == $new]
+    destroy .top2
+    set res
+} {0}
 wm geom . {}
 
 .t configure -wrap none
@@ -2019,6 +2158,70 @@ test textDisp-16.40 {text count -xpixels} {
       [.t count -xpixels 1.0 "1.0 displaylineend"] \
       [.t count -xpixels 1.0 end]
 } {35 -35 0 42 42 42 0}
+test textDisp-16.41 {text count -xpixels with indices in elided lines} {
+    set res {}
+    .t delete 1.0 end
+    for {set i 1} {$i < 40} {incr i} {
+        .t insert end [string repeat "Line $i" 20]
+        .t insert end "\n"
+    }
+    .t configure -wrap none
+    .t tag add hidden 5.15 20.15
+    .t tag configure hidden -elide true
+    lappend res [.t count -xpixels 5.15 6.0] \
+      [.t count -xpixels 5.15 6.1] \
+      [.t count -xpixels 6.0 6.1] \
+      [.t count -xpixels 6.1 6.2] \
+      [.t count -xpixels 6.1 6.0] \
+      [.t count -xpixels 6.0 7.0] \
+      [.t count -xpixels 6.1 7.1] \
+      [.t count -xpixels 15.0 20.15] \
+      [.t count -xpixels 20.15 20.16] \
+      [.t count -xpixels 20.16 20.15]
+    .t tag remove hidden 20.0 20.15
+    lappend res [expr {[.t count -xpixels 5.0 20.0] != 0}]
+} [list 0 0 0 0 0 0 0 0 $fixedWidth -$fixedWidth 1]
+test textDisp-16.42 {TkTextYviewCmd procedure with indices in elided lines} {
+    .t configure -wrap none
+    .t delete 1.0 end
+    for {set i 1} {$i < 100} {incr i} {
+        .t insert end [string repeat "Line $i" 20]
+        .t insert end "\n"
+    }
+    .t tag add hidden 5.15 20.15
+    .t tag configure hidden -elide true
+    .t yview 35.0
+    .t yview scroll [expr {- 15 * $fixedHeight}] pixels
+    update
+    .t index @0,0
+} {5.0}
+test textDisp-16.43 {TkTextYviewCmd procedure with indices in elided lines} {
+    .t configure -wrap none
+    .t delete 1.0 end
+    for {set i 1} {$i < 100} {incr i} {
+        .t insert end [string repeat "Line $i" 20]
+        .t insert end "\n"
+    }
+    .t tag add hidden 5.15 20.15
+    .t tag configure hidden -elide true
+    .t yview 35.0
+    .t yview scroll -15 units
+    update
+    .t index @0,0
+} {5.0}
+test textDisp-16.44 {TkTextYviewCmd procedure, scroll down, with elided lines} {
+    .t configure -wrap none
+    .t delete 1.0 end
+    foreach x [list 0 1 2 3 4 5 6 7 8 9 0] {
+      .t insert end "$x aaa1\n$x bbb2\n$x ccc3\n$x ddd4\n$x eee5\n$x fff6"
+      .t insert end "$x 1111\n$x 2222\n$x 3333\n$x 4444\n$x 5555\n$x 6666" hidden
+    }
+    .t tag configure hidden -elide true ; # 5 hidden lines
+    update
+    .t see [expr {5 + [winfo height .t] / $fixedHeight} + 1].0
+    update
+    .t index @0,0
+} {2.0}
 
 .t delete 1.0 end
 foreach i {a b c d e f g h i j k l m n o p q r s t u v w x y z} {
@@ -2444,7 +2647,7 @@ test textDisp-19.11.23 {TextWidgetCmd procedure, "index +displaylines"} {
       [.t index "12.0 +2d lines"] [.t index "11.0 +2d lines"] \
       [.t index "13.0 +2d lines"] [.t index "13.0 +3d lines"] \
       [.t index "13.0 +4d lines"]
-} {16.17 16.33 16.28 16.46 16.28 16.49 16.65 17.0}
+} {16.17 16.33 16.28 16.46 16.28 16.49 16.65 16.72}
 .t tag remove elide 1.0 end
 test textDisp-19.11.24 {TextWidgetCmd procedure, "index +/-displaylines"} {
     list [.t index "11.5 + -1 display lines"] \
@@ -2553,6 +2756,63 @@ test textDisp-19.16 {count -ypixels} {
       [.t count -ypixels 16.0 "16.0 displaylineend +1c"] \
       [.t count -ypixels "16.0 +1 displaylines" "16.0 +4 displaylines +3c"]
 } [list [expr {260 + 20 * $fixedDiff}] [expr {260 + 20 * $fixedDiff}] $fixedHeight [expr {2*$fixedHeight}] $fixedHeight [expr {3*$fixedHeight}]]
+test textDisp-19.17 {count -ypixels with indices in elided lines} {
+    .t configure -wrap none
+    .t delete 1.0 end
+    for {set i 1} {$i < 100} {incr i} {
+        .t insert end [string repeat "Line $i" 20]
+        .t insert end "\n"
+    }
+    .t tag add hidden 5.15 20.15
+    .t tag configure hidden -elide true
+    set res {}
+    update
+    lappend res \
+      [.t count -ypixels 1.0 6.0] \
+      [.t count -ypixels 2.0 7.5] \
+      [.t count -ypixels 5.0 8.5] \
+      [.t count -ypixels 6.1 6.2] \
+      [.t count -ypixels 6.1 18.8] \
+      [.t count -ypixels 18.0 20.50] \
+      [.t count -ypixels 5.2 20.60] \
+      [.t count -ypixels 20.60 20.70] \
+      [.t count -ypixels 5.0 25.0] \
+      [.t count -ypixels 25.0 5.0] \
+      [.t count -ypixels 25.4 27.50] \
+      [.t count -ypixels 35.0 38.0]
+    .t yview 35.0
+    lappend res [.t count -ypixels 5.0 25.0]
+} [list [expr {4 * $fixedHeight}] [expr {3 * $fixedHeight}] 0 0 0 0 0 0 [expr {5 * $fixedHeight}] [expr {- 5 * $fixedHeight}] [expr {2 * $fixedHeight}] [expr {3 * $fixedHeight}] [expr {5 * $fixedHeight}]]
+test textDisp-19.18 {count -ypixels with indices in elided lines} {
+    .t configure -wrap none
+    .t delete 1.0 end
+    for {set i 1} {$i < 100} {incr i} {
+        .t insert end [string repeat "Line $i" 20]
+        .t insert end "\n"
+    }
+    .t tag add hidden 5.15 20.15
+    .t tag configure hidden -elide true
+    .t yview 35.0
+    set res {}
+    update
+    lappend res [.t count -ypixels 5.0 25.0]
+    .t yview scroll [expr {- 15 * $fixedHeight}] pixels
+    update
+    lappend res [.t count -ypixels 5.0 25.0]
+} [list [expr {5 * $fixedHeight}] [expr {5 * $fixedHeight}]]
+test textDisp-19.19 {count -ypixels with indices in elided lines} {
+    .t configure -wrap char
+    .t delete 1.0 end
+    for {set i 1} {$i < 25} {incr i} {
+        .t insert end [string repeat "Line $i -" 6]
+        .t insert end "\n"
+    }
+    .t tag add hidden 5.27 11.0
+    .t tag configure hidden -elide true
+    .t yview 5.0
+    update
+    set res [list [.t count -ypixels 5.0 11.0] [.t count -ypixels 5.0 11.20]]
+} [list [expr {1 * $fixedHeight}] [expr {2 * $fixedHeight}]]
 .t delete 1.0 end
 .t insert end "Line 1"
 for {set i 2} {$i <= 200} {incr i} {
@@ -2722,6 +2982,42 @@ test textDisp-22.9 {TkTextCharBbox, handling of spacing} {textfonts} {
 	    [.t bbox 1.1] [.t bbox 2.9]
 } [list [list 24 11 10 4] [list 55 [expr {$fixedDiff/2 + 15}] 10 4] [list 10 [expr {2*$fixedDiff + 43}] 10 4] [list 76 [expr {2*$fixedDiff + 40}] 10 4] [list 10 11 7 $fixedHeight] [list 69 [expr {$fixedDiff + 34}] 7 $fixedHeight]]
 .t tag delete spacing
+test textDisp-22.10 {TkTextCharBbox, handling of elided lines} {textfonts} {
+    .t configure -wrap char
+    .t delete 1.0 end
+    for {set i 1} {$i < 10} {incr i} {
+        .t insert end "Line $i - Line [format %c [expr 64+$i]]\n"
+    }
+    .t tag add hidden 2.8 2.13
+    .t tag add hidden 6.8 7.13
+    .t tag configure hidden -elide true
+    update
+    list \
+        [expr {[lindex [.t bbox 2.9]  0] - [lindex [.t bbox 2.8] 0]}] \
+        [expr {[lindex [.t bbox 2.10] 0] - [lindex [.t bbox 2.8] 0]}] \
+        [expr {[lindex [.t bbox 2.13] 0] - [lindex [.t bbox 2.8] 0]}] \
+        [expr {[lindex [.t bbox 6.9]  0] - [lindex [.t bbox 6.8] 0]}] \
+        [expr {[lindex [.t bbox 6.10] 0] - [lindex [.t bbox 6.8] 0]}] \
+        [expr {[lindex [.t bbox 6.13] 0] - [lindex [.t bbox 6.8] 0]}] \
+        [expr {[lindex [.t bbox 6.14] 0] - [lindex [.t bbox 6.8] 0]}] \
+        [expr {[lindex [.t bbox 6.15] 0] - [lindex [.t bbox 6.8] 0]}] \
+        [expr {[lindex [.t bbox 7.0]  0] - [lindex [.t bbox 6.8] 0]}] \
+        [expr {[lindex [.t bbox 7.1]  0] - [lindex [.t bbox 6.8] 0]}] \
+        [expr {[lindex [.t bbox 7.12] 0] - [lindex [.t bbox 6.8] 0]}]
+} [list 0 0 0 0 0 0 0 0 0 0 0]
+test textDisp-22.11 {TkTextCharBbox, handling of wrapped elided lines} {textfonts} {
+    .t configure -wrap char
+    .t delete 1.0 end
+    for {set i 1} {$i < 10} {incr i} {
+        .t insert end "Line $i - Line _$i - Lines .$i - Line [format %c [expr 64+$i]]\n"
+    }
+    .t tag add hidden 1.30 2.5
+    .t tag configure hidden -elide true
+    update
+    list \
+        [expr {[lindex [.t bbox 1.30] 0] - [lindex [.t bbox 2.4]  0]}] \
+        [expr {[lindex [.t bbox 1.30] 0] - [lindex [.t bbox 2.5]  0]}]
+} [list 0 0]
 
 .t delete 1.0 end
 .t insert end "Line 1"