More work on readline completion

tools/tui/readline/actions_test.go

@@ -5,7 +5,9 @@ package readline
 import (
 	"container/list"
 	"fmt"
+	"kitty/tools/cli"
 	"kitty/tools/tui/loop"
+	"kitty/tools/utils/shlex"
 	"strconv"
 	"strings"
 	"testing"
@@ -481,7 +483,7 @@ func TestHistory(t *testing.T) {
 			t.Fatalf("Text before cursor not as expected:\n%s", diff)
 		}
 		if diff := cmp.Diff(after_cursor, aa); diff != "" {
-			t.Fatalf("Text before cursor not as expected:\n%s", diff)
+			t.Fatalf("Text after cursor not as expected:\n%s", diff)
 		}
 	}
 	add_item("xyz1")
@@ -512,3 +514,48 @@ func TestHistory(t *testing.T) {
 	rl.perform_action(ActionTerminateHistorySearchAndRestore, 1)
 	ah("a", "")
 }
+
+func TestReadlineCompletion(t *testing.T) {
+	lp, _ := loop.New()
+
+	completer := func(before_cursor, after_cursor string) (ans *cli.Completions) {
+		root := cli.NewRootCommand()
+		c := root.AddSubCommand(&cli.Command{Name: "test-completion"})
+		c.AddSubCommand(&cli.Command{Name: "a1"})
+		c.AddSubCommand(&cli.Command{Name: "a11"})
+		c.AddSubCommand(&cli.Command{Name: "a2"})
+		prefix := c.Name + " "
+		text := prefix + before_cursor
+		argv, position_of_last_arg := shlex.SplitForCompletion(text)
+		if len(argv) == 0 || position_of_last_arg < len(prefix) {
+			return
+		}
+		ans = root.GetCompletions(argv, nil)
+		ans.CurrentWordIdx = position_of_last_arg - len(prefix)
+		return
+
+	}
+	rl := New(lp, RlInit{Prompt: "$$ ", Completer: completer})
+
+	ah := func(before_cursor, after_cursor string) {
+		ab := rl.text_upto_cursor_pos()
+		aa := rl.text_after_cursor_pos()
+		if diff := cmp.Diff(before_cursor, ab); diff != "" {
+			t.Fatalf("Text before cursor not as expected:\n%s", diff)
+		}
+		if diff := cmp.Diff(after_cursor, aa); diff != "" {
+			t.Fatalf("Text after cursor not as expected:\n%s", diff)
+		}
+	}
+	rl.add_text("a")
+	rl.perform_action(ActionCompleteForward, 1)
+	ah("a", "")
+	rl.perform_action(ActionCompleteForward, 1)
+	ah("a1 ", "")
+	rl.perform_action(ActionCompleteForward, 1)
+	ah("a11 ", "")
+	rl.perform_action(ActionCompleteForward, 1)
+	ah("a2 ", "")
+	rl.perform_action(ActionCompleteBackward, 1)
+	ah("a11 ", "")
+}

tools/tui/readline/api.go

@@ -181,6 +181,7 @@ func (self *Readline) ResetText() {
 	self.last_action = ActionNil
 	self.keyboard_state = KeyboardState{}
 	self.history_search = nil
+	self.completions.current = completion{}
 	self.cursor_y = 0
 }
 

tools/tui/readline/completion.go

@@ -6,6 +6,7 @@ import (
 	"fmt"
 
 	"kitty/tools/cli"
+	"kitty/tools/utils"
 )
 
 var _ = fmt.Print
@@ -39,7 +40,11 @@ func (self *completion) current_match_text() string {
 		for _, g := range self.results.Groups {
 			for _, m := range g.Matches {
 				if i == self.current_match {
-					return m.Word
+					t := m.Word
+					if !g.NoTrailingSpace {
+						t += " "
+					}
+					return t
 				}
 				i++
 			}
@@ -83,6 +88,19 @@ func (self *Readline) complete(forwards bool, repeat_count uint) bool {
 	}
 	ct := c.current.current_match_text()
 	if ct != "" {
+		before := c.current.before_cursor[:c.current.results.CurrentWordIdx] + ct
+		after := c.current.after_cursor
+		self.input_state.lines = utils.Splitlines(before)
+		if len(self.input_state.lines) == 0 {
+			self.input_state.lines = []string{""}
+		}
+		self.input_state.cursor.Y = len(self.input_state.lines) - 1
+		self.input_state.cursor.X = len(self.input_state.lines[self.input_state.cursor.Y])
+		al := utils.Splitlines(after)
+		if len(al) > 0 {
+			self.input_state.lines[self.input_state.cursor.Y] += al[0]
+			self.input_state.lines = append(self.input_state.lines, al[1:]...)
+		}
 	}
 	if repeat_count > 0 {
 		self.complete(forwards, repeat_count)