text/diff: rename LevelWords to LevelChunks

Using Words seems like misleading since we capture the characters
difference, not a word as in human language.

3 files changed, 24 insertions, 20 deletions

diff --git a/lib/text/diff/diff.go b/lib/text/diff/diff.go
index 129a8d6d..91cb1372 100644
--- a/lib/text/diff/diff.go
+++ b/lib/text/diff/diff.go
@@ -11,6 +11,27 @@ import (
 	"strings"
 )
 
+// DefMatchLen minimum number of bytes used for searching the next
+// matched chunk in line.
+const DefMatchLen = 5
+
+// DefMatchRatio define default minimum match ratio to be considered as
+// change.
+const DefMatchRatio = 0.7
+
+// List of comparison levels.
+const (
+	// LevelLines captures the differences on lines level.
+	// This will fills the [Data.Adds] and [Data.Dels] only.
+	LevelLines = iota
+
+	// LevelChunks captures the differences on character level, when
+	// changes is on the same line.
+	// This will fills the [Data.LineChunks], [Data.Adds], and
+	// [Data.Dels].
+	LevelChunks
+)
+
 // Data stores additions, deletions, and changes between two texts.
 type Data struct {
 	// OldName and NewName stores the file names being compared from
@@ -183,7 +204,7 @@ func Lines(oldlines, newlines []Line, level int) (diff *Data) {
 		diff.PushAdd(newlines[y])
 	}
 
-	if level == LevelWords {
+	if level == LevelChunks {
 		// Process each changes to find modified chunkes.
 		for x, change := range diff.LineChunks {
 			adds, dels := Bytes(change.Old.Val, change.New.Val, 0, 0)
diff --git a/lib/text/diff/diff_test.go b/lib/text/diff/diff_test.go
index 1c3c8479..001e962c 100644
--- a/lib/text/diff/diff_test.go
+++ b/lib/text/diff/diff_test.go
@@ -101,7 +101,7 @@ func TestBytesRatio(t *testing.T) {
 	}
 }
 
-func TestFiles_LevelWords(t *testing.T) {
+func TestFiles_LevelChunks(t *testing.T) {
 	listCase := []struct {
 		desc    string
 		oldFile string
@@ -191,7 +191,7 @@ func TestFiles_LevelWords(t *testing.T) {
 
 	var sb strings.Builder
 	for _, tc := range listCase {
-		diff, err := Files(tc.oldFile, tc.newFile, LevelWords)
+		diff, err := Files(tc.oldFile, tc.newFile, LevelChunks)
 		if err != nil {
 			t.Fatalf(`%s: %s`, tc.desc, err)
 		}
diff --git a/lib/text/diff/func.go b/lib/text/diff/func.go
index 6acc5178..7efe55e2 100644
--- a/lib/text/diff/func.go
+++ b/lib/text/diff/func.go
@@ -8,23 +8,6 @@ import (
 	"git.sr.ht/~shulhan/pakakeh.go/lib/text"
 )
 
-const (
-	// LevelLines define that we want only lines change set.
-	LevelLines = iota
-	// LevelWords define that we want the change not only capture the
-	// different per line, but also changes inside the line.
-	LevelWords
-)
-
-const (
-	// DefMatchLen minimum number of bytes used for searching the next
-	// matched chunk in line.
-	DefMatchLen = 5
-	// DefMatchRatio define default minimum match ratio to be considered as
-	// change.
-	DefMatchRatio = 0.7
-)
-
 // Bytes returns the character differences (additions and deletion) between
 // old and new bytes, start at specific position.
 func Bytes(old, new []byte, oldat, newat int) (adds, dels text.Chunks) {