htmldiff

package module
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Published: Jan 6, 2020 License: MIT Imports: 10 Imported by: 0

README

html-diff

Calculate difference between two HTML snippets and return those differences as a merged HTML snippet showing the changes.

Usage:

	var cfg = &htmldiff.Config{
		Granularity:  5,
		InsertedSpan: []htmldiff.Attribute{{Key: "style", Val: "background-color: palegreen;"}},
		DeletedSpan:  []htmldiff.Attribute{{Key: "style", Val: "background-color: lightpink;"}},
		ReplacedSpan: []htmldiff.Attribute{{Key: "style", Val: "background-color: lightskyblue;"}},
		CleanTags:    []string{""},
	}
	res, err := cfg.HTMLdiff([]string{previousHTML, latestHTML})
	mergedHTML := res[0]

see example_test.go

Only deals with body HTML, so no headers, only what is within the body element.

Requires Go1.5+, with vendoring support. Vendors "github.com/mb0/diff", "golang.org/x/net/html" and "golang.org/x/net/html/atom".

Running the tests will create output files in testout/*.html.

For fuzz-testing using https://github.com/dvyukov/go-fuzz , the Fuzz() function is in fuzz.go (as at Feb'16 you need to rename the vendor directory while you fuzz, and go get the dependencies - an issue with "go/importer", see https://github.com/golang/go/issues/13756).

Pull requests welcome.

Documentation

Index

Constants

This section is empty.

Variables

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Functions

This section is empty.

Types

type Attribute

type Attribute struct {
	Namespace, Key, Val string
}

Attribute exists so that this package does not export html.Attribute, to allow vendoring of "golang.org/x/net/html".

type Config

type Config struct {
	Granularity                             int         // how many letters to put together for a change, if possible
	InsertedSpan, DeletedSpan, ReplacedSpan []Attribute // the attributes for the span tags wrapping changes
	CleanTags                               []string    // HTML tags to clean from the input
}

Config describes the way that HTMLdiff works.

func (*Config) HTMLdiff

func (c *Config) HTMLdiff(versions []string) ([]string, error)

HTMLdiff finds all the differences in the versions of HTML snippits, versions[0] is the original, all other versions are the edits to be compared. The resulting merged HTML snippits are as many as there are edits to compare.

Directories

Path Synopsis
Package vizhtml provides a way to display html node trees for debug purposes.
Package vizhtml provides a way to display html node trees for debug purposes.

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