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Casey McLaughlin
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README.md
99
README.md
@ -7,14 +7,14 @@ Geneates Table of Contents from H1...H6 Tags in HTML Content
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[](https://travis-ci.org/caseyamcl/toc.png)
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This package provides a simple, framework-agnostic library to build
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a Table-of-Contents from HTML markup. It does so by parsing H1...H6
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tags. It can also automatically add appropriate "id" anchor links to header tags.
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a Table-of-Contents from HTML markup. It does so by parsing *H1...H6* tags. It can also automatically add appropriate *id* anchor attributes to header tags.
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Features:
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* Generates menu iterator or HTML <li*gt; tags
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* Can add anchor IDs to *H1*...*H6* where they do not already exist
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* Specify which *H1*...*H6* heading tags to include in the TOC
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* Includes Twig Extension for generating TOC lists and compatible markup directly from templates
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* Generates HTML menus and KnpMenu `Item` Menus
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* Can add anchor ID attributes to *H1*...*H6* tags in your content where they do not already exist
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* You can specify which *H1*...*H6* heading tag levels to include in the TOC
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* Includes a Twig Extension for generating TOC lists and compatible markup directly from templates
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* Uses the flexible [KnpMenu Library](https://github.com/KnpLabs/KnpMenu) to generate menus
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* PSR-0 thru PSR-2 Compliant
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* Composer-compatible
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@ -22,10 +22,8 @@ Features:
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In the spirit of KISS philosophy, this library makes a few assumptions:
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1. The hierarchy of your content is defined solely by the header (*H1*...*H6*) tags. All other tags
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are ignored.
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2. The link titles in the Table of Contents should match either the `title` attribute of the header tag,
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or if there is no `title`, the plaintext body of the header tag.
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1. The hierarchy of your content is defined solely by the header (*H1*...*H6*) tags. All other tags are ignored.
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2. The link titles in the Table of Contents match either the `title` attribute of the header tag, or if there is no `title`, the plaintext body of the header tag.
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Installation Options
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--------------------
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@ -37,15 +35,15 @@ Install via [Composer](http://getcomposer.org/) by including the following in yo
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}
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}
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Or, drop the `src` folder into your application and use a PSR-4 autoloader to include the files.
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Or, drop the `src` folder into your application and use a [PSR-4 autoloader](http://www.php-fig.org/psr/psr-4/) to include the files.
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Usage
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-----
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This contains two basic classes:
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This package contains two basic classes:
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1. `MarkupFixer`: Adds `id` anchor attributes to any *H1*...*H6* tags that do not already have any.
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2. `TocGenerator`: Generates HTML (or an associative array) of anchor links that can be rendered in your template.
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1. `TOC\MarkupFixer`: Adds `id` anchor attributes to any *H1*...*H6* tags that do not already have any (you can customize the header levels).
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2. `TOC\TocGenerator`: Generates an HTML (or KnpMenu) Table of Contents.
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Basic Example:
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@ -72,34 +70,29 @@ echo $htmlOut;
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Twig Integration
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----------------
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This library includes a [Twig](http://twig.sensiolabs.org) extension that enables you to load
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TOC lists and add anchors to markup from your Twig templates.
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This library includes a [Twig](http://twig.sensiolabs.org) extension that enables you to load TOC lists and add anchors to markup from your Twig templates.
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Specifically, the extension adds a Twig function for generating Table of Contents HTML:
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```twig
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{# Generates HTML markup for given htmlContent #}
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{# The second two parameters are optional (defaults are 1, 6) #}
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<ul>{{ toc(htmlContent, '1', '3') }}</ul>
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<ul>{{ toc(htmlContent) }}</ul>
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```
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It also adds one function and one filter for ensuring that your content includes anchors for
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all HTML tags:
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It also adds one function and one filter for ensuring that your content includes anchors for all HTML header tags:
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```twig
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{# Adds anchor links (id tags) for given htmlContent #}
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{# The second two parameters are optional (defaults are 1, 6) #}
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{{ add_anchors(htmlContent, '1', '2')
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{{ add_anchors(htmlContent)
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{# You can also use it as a filter #}
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<div class='my_content'>
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{{ htmlContent | add_anchors('h1', 'h3') }}
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{{ htmlContent | add_anchors }}
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</div>
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```
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You may have content in hard-coded in your Twig Template that you want to TOC-ize. An
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easy way to do this is to make sure the content is surrounded by `{% block %}...{% endblock %}`
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tags, and then just pass in that content to the *toc* functions>
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You may have content in hard-coded in your Twig Template that you want to generate a TOC for. An easy way to do this is to make sure the content is surrounded by `{% block %}...{% endblock %}`
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tags, and then just pass in that block to the *toc* function.
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For example:
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@ -107,11 +100,11 @@ For example:
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{% extends 'base.html.twig' %}
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{% block page_content %}
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<div class='page_sidebar'>
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{{ toc(add_anchors(block('my_writeup'), 'h1', 'h2'), 'h1', 'h2') }}
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{{ toc(add_anchors(block('my_writeup'))) }}
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</div>
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<div class='page_content'>
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{{ add_anchors(block('my_writeup'), 'h1', 'h2') }}
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{{ add_anchors(block('my_writeup')) }}
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</div>
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{% endblock %}
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@ -123,21 +116,59 @@ For example:
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{% endblock %}
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```
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In order to enable this functionality, you must register the `TocTwigExtension` with your Twig environment:
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In order to enable Twig integration, you must register the `TocTwigExtension` with your Twig environment:
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```php
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$myTwig = new \Twig_Environment();
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$myTwig->addExtension(new TocTwigExtension());
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$myTwig->addExtension(new TOC\TocTwigExtension());
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```
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Specifying Heading Levels to Include
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-------------------------------------------
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You can choose to include only specific *h1...h6* heading levels in your TOC. To do this, pass two additional arguments to the `TocGenerator::getHtmlMenu()` method: `$topLevel` and `$depth`. For example:
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```php
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$tocGenerator = new TOC\TocGenerator();
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// Get TOC using h2, h3, h4
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$toc->getHtmlMenu($someHtmlContent, 2, 3);
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// Get TOC using h1, h2
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$toc->getHtmlMenu($someHtmlContent, 1, 2);
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// Get TOC using h4, h5, h6
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$toc->getHtmlMenu($someHtmlContent, 4, 3);
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```
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Most other methods in the package take this arguments as well:
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```php
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$tocGenerator = new TOC\TocGenerator();
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$markupFixer = new TOC\MarkupFixer();
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// Get KnpMenu using h1, h2, h3
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$tocGenerator->getMenu($someHtmlContent, 1, 3);
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// Fix markup for h3, h4 tags only
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$markupFixer->fix($someHtmlContent, 3, 2);
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```
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Twig functions and filters accept this arguments too:
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```twig
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{# Generate TOC using h2, h3 tags #}
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{{ toc(my_content, 2, 3) }}
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{# Add anchors to h4, h5, h6 tags #}
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{{ my_content | add_anchors(4, 3) }}
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```
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Customizing Menu Output
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-----------------------
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The `TocGenerator` class outputs HTML by default, but you can customize the rendering of the list. By default
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`TocGenerator` uses the [KnpMenu Library](https://github.com/KnpLabs/KnpMenu) `ListRenderer` class to output the HTML.
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You can customize the rendering of lists that the `TocGenerator` class outputs. By default, `TocGenerator` uses the [KnpMenu ListRenderer](https://github.com/KnpLabs/KnpMenu/blob/master/src/Knp/Menu/Renderer/ListRenderer.php) class to output the HTML.
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You can pass your instance of the `ListRenderer` class to `TocGenerator::getHtmlMenu()`. Or, you can pass in
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your own renderer (implements [`Knp\Menu\Renderer\RendererInterface`](https://github.com/KnpLabs/KnpMenu/blob/master/src/Knp/Menu/Renderer/RendererInterface.php)).
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You can pass your own instance of the `ListRenderer` class to `TocGenerator::getHtmlMenu()`. Or, you can pass in your own renderer (implements [`Knp\Menu\Renderer\RendererInterface`](https://github.com/KnpLabs/KnpMenu/blob/master/src/Knp/Menu/Renderer/RendererInterface.php)).
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For example, you may wish to use different CSS classes for your list items:
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