vim-patch:9.0.2032: cannot get mouse click pos for tab or virt text (#25653)

Problem:  Cannot accurately get mouse clicking position when clicking on
          a TAB or with virtual text.
Solution: Add a "coladd" field to getmousepos() result.

closes: vim/vim#13335

f5a94d5165

test/functional/ui/fold_spec.lua

@@ -2155,13 +2155,14 @@ describe("folded lines", function()
 
       meths.input_mouse('left', 'press', '', multigrid and 2 or 0, 4, 0)
       eq({
-        column = 1,
-        line = 3,
         screencol = 1,
         screenrow = 5,
-        wincol = 1,
         winid = 1000,
+        wincol = 1,
         winrow = 5,
+        line = 3,
+        column = 1,
+        coladd = 0,
       }, funcs.getmousepos())
 
       meths.buf_set_extmark(0, ns, 1, 0, { virt_lines = {{{"more virt_line below line 2", ""}}} })

test/functional/ui/mouse_spec.lua

@@ -1717,6 +1717,7 @@ describe('ui/mouse/input', function()
             eq(0, mousepos.wincol)
             eq(0, mousepos.line)
             eq(0, mousepos.column)
+            eq(0, mousepos.coladd)
           end
         end
       end
@@ -1736,15 +1737,18 @@ describe('ui/mouse/input', function()
         eq(win_col + 1, mousepos.wincol)
         local line = 0
         local column = 0
+        local coladd = 0
         if win_row > 0 and win_row < opts.height + 1
             and win_col > 0 and win_col < opts.width + 1 then
           -- Because of border, win_row and win_col don't need to be
           -- incremented by 1.
           line = math.min(win_row, funcs.line('$'))
           column = math.min(win_col, #funcs.getline(line) + 1)
+          coladd = win_col - column
         end
         eq(line, mousepos.line)
         eq(column, mousepos.column)
+        eq(coladd, mousepos.coladd)
       end
     end
 
@@ -1764,8 +1768,10 @@ describe('ui/mouse/input', function()
         eq(win_col + 1, mousepos.wincol)
         local line = math.min(win_row + 1, funcs.line('$'))
         local column = math.min(win_col + 1, #funcs.getline(line) + 1)
+        local coladd = win_col + 1 - column
         eq(line, mousepos.line)
         eq(column, mousepos.column)
+        eq(coladd, mousepos.coladd)
       end
     end
 
@@ -1788,8 +1794,10 @@ describe('ui/mouse/input', function()
           eq(win_col + 1, mousepos.wincol)
           local line = math.min(win_row + 1, funcs.line('$'))
           local column = math.min(win_col + 1, #funcs.getline(line) + 1)
+          local coladd = win_col + 1 - column
           eq(line, mousepos.line)
           eq(column, mousepos.column)
+          eq(coladd, mousepos.coladd)
         end
       end
     end

test/old/testdir/test_functions.vim

@@ -3068,6 +3068,7 @@ func Test_getmousepos()
         \ wincol: 1,
         \ line: 1,
         \ column: 1,
+        \ coladd: 0,
         \ }, getmousepos())
   call Ntest_setmouse(1, 2)
   call assert_equal(#{
@@ -3078,6 +3079,7 @@ func Test_getmousepos()
         \ wincol: 2,
         \ line: 1,
         \ column: 1,
+        \ coladd: 1,
         \ }, getmousepos())
   call Ntest_setmouse(1, 8)
   call assert_equal(#{
@@ -3088,6 +3090,7 @@ func Test_getmousepos()
         \ wincol: 8,
         \ line: 1,
         \ column: 1,
+        \ coladd: 7,
         \ }, getmousepos())
   call Ntest_setmouse(1, 9)
   call assert_equal(#{
@@ -3098,6 +3101,7 @@ func Test_getmousepos()
         \ wincol: 9,
         \ line: 1,
         \ column: 2,
+        \ coladd: 0,
         \ }, getmousepos())
   call Ntest_setmouse(1, 12)
   call assert_equal(#{
@@ -3108,6 +3112,7 @@ func Test_getmousepos()
         \ wincol: 12,
         \ line: 1,
         \ column: 2,
+        \ coladd: 3,
         \ }, getmousepos())
   call Ntest_setmouse(1, 25)
   call assert_equal(#{
@@ -3118,6 +3123,29 @@ func Test_getmousepos()
         \ wincol: 25,
         \ line: 1,
         \ column: 4,
+        \ coladd: 0,
+        \ }, getmousepos())
+  call Ntest_setmouse(1, 28)
+  call assert_equal(#{
+        \ screenrow: 1,
+        \ screencol: 28,
+        \ winid: win_getid(),
+        \ winrow: 1,
+        \ wincol: 28,
+        \ line: 1,
+        \ column: 7,
+        \ coladd: 0,
+        \ }, getmousepos())
+  call Ntest_setmouse(1, 29)
+  call assert_equal(#{
+        \ screenrow: 1,
+        \ screencol: 29,
+        \ winid: win_getid(),
+        \ winrow: 1,
+        \ wincol: 29,
+        \ line: 1,
+        \ column: 8,
+        \ coladd: 0,
         \ }, getmousepos())
   call Ntest_setmouse(1, 50)
   call assert_equal(#{
@@ -3128,6 +3156,7 @@ func Test_getmousepos()
         \ wincol: 50,
         \ line: 1,
         \ column: 8,
+        \ coladd: 21,
         \ }, getmousepos())
 
   " If the mouse is positioned past the last buffer line, "line" and "column"
@@ -3141,6 +3170,7 @@ func Test_getmousepos()
         \ wincol: 25,
         \ line: 1,
         \ column: 4,
+        \ coladd: 0,
         \ }, getmousepos())
   call Ntest_setmouse(2, 50)
   call assert_equal(#{
@@ -3151,6 +3181,7 @@ func Test_getmousepos()
         \ wincol: 50,
         \ line: 1,
         \ column: 8,
+        \ coladd: 21,
         \ }, getmousepos())
   bwipe!
 endfunc