termiointernals: fix regression on selecting word at start of line

In case of double-click.

src/bin/termiointernals.c

@@ -873,15 +873,20 @@ _sel_word(Termio *sd, int cx, int cy)
         goto end;
      }
    if (x >= w)
-     x = w - 1;
+     {
+        x = w - 1;
+     }
 
+   /* To the left and up */
    do
      {
         for (; x >= 0; x--)
           {
              if ((cells[x].codepoint == 0) && (cells[x].att.dblwidth) &&
                  (x > 0))
-               x--;
+               {
+                  x--;
+               }
              if (_codepoint_is_wordsep(cells[x].codepoint))
                {
                   done = EINA_TRUE;
@@ -893,12 +898,14 @@ _sel_word(Termio *sd, int cx, int cy)
         if (!done)
           {
              Termcell *old_cells = cells;
+             size_t old_w = w;
 
              cells = termpty_cellrow_get(sd->pty, y - 1, &w);
-             if (!cells || !cells[w-1].att.autowrapped)
+             if ((!cells) || (w == 0) || (!cells[w-1].att.autowrapped))
                {
-                  x = 0;
+                  x = cx;
                   cells = old_cells;
+                  w = old_w;
                   done = EINA_TRUE;
                }
              else
@@ -922,6 +929,7 @@ _sel_word(Termio *sd, int cx, int cy)
      }
    x = cx;
 
+   /* To the right and down */
    do
      {
         for (; x < w; x++)
@@ -943,7 +951,9 @@ _sel_word(Termio *sd, int cx, int cy)
         if (!done)
           {
              if (!cells[w - 1].att.autowrapped)
-               goto end;
+               {
+                  goto end;
+               }
              y++;
              x = 0;
              cells = termpty_cellrow_get(sd->pty, y, &w);

tests/selection_word_regression.sh

@@ -0,0 +1,94 @@
+#!/bin/sh
+
+# char width: 7
+# char height: 15
+
+# clear screen
+printf '\033[2J'
+
+# set color
+printf '\033[46;31;3m'
+
+#move to 2,0
+printf '\033[2H'
+
+# set text
+printf "Insanity is doing the same thing, over and over again, but expecting different results"
+# force render
+printf '\033}tr\0'
+
+## Select simple word: "thing"
+# double-click to select word
+printf '\033}td;200;20;1;0;0\0'
+printf '\033}tu;200;20;1;0;0\0'
+printf '\033}td;200;20;1;0;1\0'
+printf '\033}tu;200;20;1;0;1\0'
+# force render
+printf '\033}tr\0'
+# assert selection is
+printf '\033}tsthing\0'
+# remove selection
+printf '\033}td;0;0;1;0;0\0\033}tu;0;0;1;0;0\0'
+printf '\033}tc;0;0\0\033}tc;1;0\0'
+
+## Select last word: "results"
+# double-click to select word
+printf '\033}td;20;35;1;0;0\0'
+printf '\033}tu;20;35;1;0;0\0'
+printf '\033}td;20;35;1;0;1\0'
+printf '\033}tu;20;35;1;0;1\0'
+# force render
+printf '\033}tr\0'
+# assert selection is
+printf '\033}tsresults\0'
+# remove selection
+printf '\033}td;0;0;1;0;0\0\033}tu;0;0;1;0;0\0'
+printf '\033}tc;0;0\0\033}tc;1;0\0'
+
+## Same but by the start of the word, at the end of the previous line
+# double-click to select word
+printf '\033}td;555;20;1;0;0\0'
+printf '\033}tu;555;20;1;0;0\0'
+printf '\033}td;555;20;1;0;1\0'
+printf '\033}tu;555;20;1;0;1\0'
+# force render
+printf '\033}tr\0'
+# assert selection is
+printf '\033}tsresults\0'
+# remove selection
+printf '\033}td;0;0;1;0;0\0\033}tu;0;0;1;0;0\0'
+printf '\033}tc;0;0\0\033}tc;1;0\0'
+
+## Select first word: "Insanity"
+# There was a bug where only the part of the word on the left of the mouse
+# cursor was selected
+# double-click to select word
+printf '\033}td;40;20;1;0;0\0'
+printf '\033}tu;40;20;1;0;0\0'
+printf '\033}td;40;20;1;0;1\0'
+printf '\033}tu;40;20;1;0;1\0'
+# force render
+printf '\033}tr\0'
+# assert selection is
+printf '\033}tsInsanity\0'
+# remove selection
+printf '\033}td;0;0;1;0;0\0\033}tu;0;0;1;0;0\0'
+printf '\033}tc;0;0\0\033}tc;1;0\0'
+
+# Now with a line before
+# move to 1,0
+printf '\033[1H'
+# insert line
+printf 'Quote:'
+# double-click to select word
+printf '\033}td;10;20;1;0;0\0'
+printf '\033}tu;10;20;1;0;0\0'
+printf '\033}td;10;20;1;0;1\0'
+printf '\033}tu;10;20;1;0;1\0'
+# force render
+printf '\033}tr\0'
+# assert selection is
+printf '\033}tsInsanity\0'
+# remove selection
+printf '\033}td;0;0;1;0;0\0\033}tu;0;0;1;0;0\0'
+printf '\033}tc;0;0\0\033}tc;1;0\0'

tests/tests.results

@@ -86,6 +86,7 @@ selection_box_all_directions.sh ad1c5bf43f0ec9a921616c3da10cab7f
 selection_drag.sh ad1c5bf43f0ec9a921616c3da10cab7f
 selection_box_drag.sh ad1c5bf43f0ec9a921616c3da10cab7f
 selection_double_click.sh 117cae3dc20237feff08adce1f3c7a2a
+selection_word_regression.sh 5d11b208701cc28dc07ca45cf484def9
 selection_triple_click.sh 1e7588ca4e6bebee6c0f9af3836974b6
 selection_scrolls.sh 3bc69b854a40e1eee64275652f01b827
 selection_with_margins_scrolled.sh f3df5d5f2328f12cc8aac254b983306f