README

What changed between two versions, shown in a template and walked through change by change.

phil/text-diff-bundle brings phil/text-diff into a Symfony application. It registers the differ with the bound of edits the configuration sets, and two Twig filters: text_diff compares two texts by words, lines, paragraphs or HTML and writes the difference with <ins> and <del>; text_diff_document compares two UJO documents block by block and renders each block with the application's UJO renderer when phil/ujo-bundle is installed. The comparison Stimulus controller switches a difference between the inline view, the old text alone and the new text alone, steps from one change to the next — a replacement is one change —, and announces where it stands in a live region. A stylesheet colours the marks, underlines insertions and strikes deletions so that colour is never the only cue.

It is for any Symfony application that keeps versions of what people write: the revision history of a page or an article, the review of a proposed edit, the check of a document before it is published again.

It is built on the components Symfony already ships: Config and DependencyInjection for the configuration, Twig's attribute extensions for the filters, AssetMapper and StimulusBundle for the controller, and HtmlSanitizer, when configured, for the HTML a template does not mark safe.

Status

Part	State
The `TextDiff` service, its bound of edits and its default tokenizer from configuration	Implemented and tested
`text_diff`: plain text escaped, HTML trusted only when marked safe, sanitized or escaped otherwise	Implemented and tested
`text_diff_document`: UJO documents block by block, rendered by the application's renderer	Implemented and tested
The `comparison` controller: inline, old and new views; next and previous change; a live counter	Implemented and tested
The stylesheet: light and dark, print, views and current change, mapped for AssetMapper	Implemented and tested
A side-by-side view in two columns	Not started: the old and new views show one text at a time

Documentation

Document	What it covers
Installation	Requirements, installing, the controller and the stylesheet.
Configuration	Every key of `phil_text_diff`.
Twig	`text_diff` and `text_diff_document`, and what each trusts.
JavaScript	The `comparison` controller: targets, values, actions, accessibility.
Styling	The stylesheet, its custom properties and the views.
Extension points	The UJO services, the HTML sanitizer, the differ, the controller's labels.
Exceptions	What the bundle throws, and when.
Testing	The bundle's tests, and how to test a page that shows differences.
Reference	Every class, service, constant and asset of the bundle.

Quick start

composer require phil/text-diff-bundle

<link rel="stylesheet" href="{{ asset('phil-text-diff/text-diff.css') }}">

<section data-controller="phil--text-diff-bundle--comparison">
    <div role="group" aria-label="View">
        <button type="button" data-action="phil--text-diff-bundle--comparison#show" data-phil--text-diff-bundle--comparison-mode-param="inline" data-phil--text-diff-bundle--comparison-target="mode">Both</button>
        <button type="button" data-action="phil--text-diff-bundle--comparison#show" data-phil--text-diff-bundle--comparison-mode-param="old" data-phil--text-diff-bundle--comparison-target="mode">Before</button>
        <button type="button" data-action="phil--text-diff-bundle--comparison#show" data-phil--text-diff-bundle--comparison-mode-param="new" data-phil--text-diff-bundle--comparison-target="mode">After</button>
    </div>
    <button type="button" data-action="phil--text-diff-bundle--comparison#previous">Previous change</button>
    <button type="button" data-action="phil--text-diff-bundle--comparison#next">Next change</button>
    <p role="status" data-phil--text-diff-bundle--comparison-target="counter"></p>

    <div data-phil--text-diff-bundle--comparison-target="output">
        {{ previous.body|text_diff_document(current.body) }}
    </div>
</section>

Requirements

PHP 8.5 or later, phil/text-diff, phil/ujo, and the Symfony 8.2 components Config and DependencyInjection. twig/twig for the filters, symfony/stimulus-bundle and symfony/asset-mapper for the controller and the stylesheet, phil/ujo-bundle for the application's block types, symfony/html-sanitizer for HTML a template does not mark safe — each only when used.

Contributing

Contributions are welcome on the PHIL monorepo: read the contribution guide and the code of conduct. Report a vulnerability privately, as the security policy explains, never in a public issue.

phil / text-diff-bundle

Package info

Security

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