textdiff

package

v1.0.0 Latest Latest Go to latest Published: Oct 19, 2026 License: Apache-2.0 Imports: 4 Imported by: 0

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Repository

github.com/tragent-io/acurl

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Documentation ¶

Overview ¶

Package textdiff compares what different agents were shown on a page.

Comparisons work on visible text, not raw HTML, so that nonces, CSRF tokens, inline scripts and attribute order do not count as differences.

Index ¶

func Changed(lines []Line) bool
func Similarity(a, b string) float64
func VisibleText(doc []byte) string
type Line
- func Lines(a, b string, context int) []Line
type Op

Constants ¶

This section is empty.

Variables ¶

This section is empty.

Functions ¶

func Changed ¶

func Changed(lines []Line) bool

Changed reports whether lines contain any insertion or deletion.

func Similarity ¶

func Similarity(a, b string) float64

Similarity returns a score in [0, 1] for how alike two visible texts are, using the Jaccard index over word 3-grams (shingles). Identical texts score 1; texts with nothing in common score 0.

func VisibleText ¶

func VisibleText(doc []byte) string

VisibleText extracts the human-visible text of an HTML document, one block per line, with whitespace collapsed. The <title> is kept even though it lives in <head>.

Types ¶

type Line ¶

type Line struct {
	Op   Op
	Text string
}

Line is one line of a line-based diff.

func Lines ¶

func Lines(a, b string, context int) []Line

Lines diffs a and b line by line and keeps context unchanged lines around each change. Longer unchanged runs collapse into a single Skip line.

type Op ¶

type Op int

Op is the kind of a diff line.

const (
	Equal Op = iota
	Insert
	Delete
	Skip // marks elided unchanged lines
)

Diff line kinds.

Source Files ¶

View all Source files

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