Merge pull request #6 from demyanovs/release-v3.0.0

### Added
- Support for `<pre><code>` pattern (in addition to `<pre>`) for better Markdown compatibility
- Support for `class="language-*"` attribute on `<code>` tag for language detection
- Fluent interface for `showLineNumbers()` and `showActionPanel()` methods
- `HighlighterFactory` class for creating highlighter instances based on language
- `CodeBlockWrapper` class for separating presentation logic from highlighting
- `LanguageNormalizer` class for normalizing language identifiers with aliases support
- Custom exceptions: `InvalidLanguageException`, `InvalidThemeException`, `ThemeNotSetException`
- PHP as default language for code blocks without specified language
- Comprehensive test suite

### Changed
- **BREAKING**: Removed Singleton pattern from all highlighter classes (`HighlighterPHP`, `HighlighterXML`, `HighlighterBash`)
- **BREAKING**: Made `HighlighterBase` an abstract class (cannot be instantiated directly)
- **BREAKING**: Added `ext-dom` PHP extension requirement (previously optional with regex fallback)
- Improved HTML attribute parsing using `DOMDocument` with regex fallback
- Enhanced syntax highlighting logic in `HighlighterBase`
- Improved XML/HTML highlighting: fixed line-by-line processing, proper attribute highlighting
- Updated PHPDoc comments throughout the codebase

### Fixed
- Fixed issue with extra empty lines at the beginning and end of code blocks
- Fixed line numbering

Author: demyanovs

CHANGELOG.md

@@ -28,4 +28,30 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ## [2.1.0] - 2023-06-13
 - Set PHP minimum version in composer
 - Throws UnknownThemeException
-- Added tests
+- Added tests
+
+## [3.0.0] - 2025-11-21
+
+### Added
+- Support for `<pre><code>` pattern (in addition to `<pre>`) for better Markdown compatibility
+- Support for `class="language-*"` attribute on `<code>` tag for language detection
+- Fluent interface for `showLineNumbers()` and `showActionPanel()` methods
+- `HighlighterFactory` class for creating highlighter instances based on language
+- `CodeBlockWrapper` class for separating presentation logic from highlighting
+- `LanguageNormalizer` class for normalizing language identifiers with aliases support
+- Custom exceptions: `InvalidLanguageException`, `InvalidThemeException`, `ThemeNotSetException`
+- PHP as default language for code blocks without specified language
+- Comprehensive test suite
+
+### Changed
+- **BREAKING**: Removed Singleton pattern from all highlighter classes (`HighlighterPHP`, `HighlighterXML`, `HighlighterBash`)
+- **BREAKING**: Made `HighlighterBase` an abstract class (cannot be instantiated directly)
+- **BREAKING**: Added `ext-dom` PHP extension requirement (previously optional with regex fallback)
+- Improved HTML attribute parsing using `DOMDocument` with regex fallback
+- Enhanced syntax highlighting logic in `HighlighterBase`
+- Improved XML/HTML highlighting: fixed line-by-line processing, proper attribute highlighting
+- Updated PHPDoc comments throughout the codebase
+
+### Fixed
+- Fixed issue with extra empty lines at the beginning and end of code blocks
+- Fixed line numbering

README.md

@@ -3,11 +3,13 @@
 PHPHighlight is a PHP syntax highlighting library that can be easily customized and extended.
 
 ## How it works
-The library parses the text, finds the \<pre> tag, reads the attributes (data-lang, data-file, data-theme) and highlights the syntax of the code block.
+The library parses the text, finds the `<pre>` and `<pre><code>` tags, reads the attributes (data-lang, data-file, data-theme) and highlights the syntax of the code block.
+
+**Recommended:** Use `<pre><code>` pattern for better semantics and compatibility with Markdown output.
 
 Supports style customization. Here are examples of styling:
 
-<img width="757" height="309" src="https://demyanov.dev/sites/default/files/images/phphighlight2.png" alt="styling example">
+<img width="757" height="309" src="examples/img/scr_01.png" alt="styling example">
 
 ## Requirements
 PHP 8.1+
@@ -19,7 +21,7 @@ $ composer require demyanovs/php-highlight
 ```
 
 ## Usage
-See full example here [index.php](../master/examples/index.php)
+See full example in [examples/index.php](examples/index.php)
 ```php
 <?php
 
@@ -29,7 +31,7 @@ use Demyanovs\PHPHighlight\Highlighter;
 use Demyanovs\PHPHighlight\Themes\ObsidianTheme;
 
 $text = '
-<pre data-file="php-highlight/examples/index.php" data-lang="php">
+<pre><code class="language-php" data-file="php-highlight/examples/index.php">
 &lt;?php
 abstract class AbstractClass
 {
@@ -62,13 +64,12 @@ class ConcreteClass extends AbstractClass
 $class = new ConcreteClass;
 echo $class->prefixName("Pacman"), "\n";
 echo $class->prefixName("Pacwoman"), "\n";
-</pre>
+</code></pre>
 ';
 
-$highlighter = new Highlighter($text, ObsidianTheme::TITLE);
-// Configuration
-$highlighter->showLineNumbers(true);
-$highlighter->showActionPanel(true);
+$highlighter = (new Highlighter($text, ObsidianTheme::TITLE))
+        ->showLineNumbers(true)
+        ->showActionPanel(true);
 echo $highlighter->parse();
 ```
 
@@ -78,19 +79,53 @@ $highlighter->showLineNumbers(true);
 $highlighter->showActionPanel(true);
 ```
 
-You can set following attributes in \<pre> tag
-\<pre data-lang="php" data-file="example.php" data-theme="drakuala">
-* lang - a language of the text. This affects how the parser will highlight the syntax.
-* file - show file name in action panel.
-* theme - allows to overwrite the global theme.
+You can set following attributes in `<pre>` or `<code>` tags:
+```html
+<pre><code class="language-php" data-file="example.php" data-theme="darkula">
+// or
+<pre data-lang="php" data-file="example.php" data-theme="darkula"><code>
+```
+
+* `data-lang` or `class="language-*"` - a language of the text. This affects how the parser will highlight the syntax.
+* `data-file` - show file name in action panel.
+* `data-theme` - allows to overwrite the global theme.
+
+**Note:** `class="language-*"` on `<code>` tag is automatically recognized (common in Markdown output).
 
 ### How to create a custom theme
-To create a custom theme you need to create an instance of Demyanovs\PHPHighlight\Themes\Theme class
+To create a custom theme you need to create an instance of `Demyanovs\PHPHighlight\Themes\Theme` class
 and pass it to Highlighter as a third argument:
 ```php
-$defaultColorSchemaDto = new DefaultColorSchemaDto(...);
-$PHPColorSchemaDto = new PHPColorSchemaDto(...);
-$XMLColorSchemaDto = new XMLColorSchemaDto(...);
+use Demyanovs\PHPHighlight\Highlighter;
+use Demyanovs\PHPHighlight\Themes\Theme;
+use Demyanovs\PHPHighlight\Themes\Dto\DefaultColorSchemaDto;
+use Demyanovs\PHPHighlight\Themes\Dto\PHPColorSchemaDto;
+use Demyanovs\PHPHighlight\Themes\Dto\XMLColorSchemaDto;
+
+$defaultColorSchemaDto = new DefaultColorSchemaDto(
+    '#000000', // background
+    '#ffffff', // default text
+    '#888888', // comment
+    '#ff0000', // keyword
+    '#00ff00', // string
+    '#0000ff', // number
+    '#ffff00'  // variable
+);
+
+$PHPColorSchemaDto = new PHPColorSchemaDto(
+    '#0000BB', // keyword
+    '#FF8000', // variable
+    '#fbc201', // function
+    '#007700', // string
+    '#DD0000'  // comment
+);
+
+$XMLColorSchemaDto = new XMLColorSchemaDto(
+    '#008000', // tag
+    '#7D9029', // attribute
+    '#BA2121', // string
+    '#BC7A00'  // comment
+);
 
 $myTheme = new Theme(
     'myThemeTitle',
@@ -124,5 +159,8 @@ Pull requests are welcome. For major changes, please open an issue first to disc
 
 Please make sure to update tests as appropriate.
 
+## Changelog
+See [CHANGELOG.md](./CHANGELOG.md) for a list of changes and version history.
+
 ## License
 [MIT](./LICENSE.md)

composer.json

@@ -17,7 +17,8 @@
         }
     ],
     "require": {
-        "php": ">=8.1"
+        "php": ">=8.1",
+        "ext-dom": "*"
     },
     "autoload": {
         "psr-4": {
@@ -31,13 +32,15 @@
     },
     "require-dev": {
         "phpunit/phpunit": "^10.2",
-        "squizlabs/php_codesniffer": "*",
+        "squizlabs/php_codesniffer": "^3.13",
         "doctrine/coding-standard": "^12.0"
     },
     "config": {
         "allow-plugins": {
             "dealerdirect/phpcodesniffer-composer-installer": true
-        }
+        },
+        "sort-packages": true,
+        "prefer-stable": true
     },
     "scripts": {
         "test": "./vendor/bin/phpunit",

examples/css/highlighter.css

@@ -54,3 +54,7 @@
 .code-highlighter .line-number {
     display: block;
 }
+
+.code-block-wrapper .code-block {
+    display: block;
+}

examples/img/scr_01.png

@@ -15,7 +15,7 @@
 
 $text = '
 <h2>PHP</h2>
-<pre data-file="php-highlight/examples/index.php" data-lang="php">
+<pre><code class="language-php" data-file="php-highlight/examples/index.php">
 &lt;?php
 abstract class AbstractClass
 {
@@ -48,10 +48,10 @@ public function prefixName(string $name): string
 $class = new ConcreteClass;
 echo $class->prefixName("Pacman"), "\n";
 echo $class->prefixName("Pacwoman"), "\n";
-</pre>
+</code></pre>
 
 <h2>JavaScript</h2>
-<pre data-file="example.js" data-lang="js">
+<pre><code class="language-javascript" data-file="example.js">
 // Arrow functions let us omit the `function` keyword. Here `long_example`
 // points to an anonymous function value.
 const long_example = (input1, input2) => {
@@ -65,10 +65,10 @@ public function prefixName(string $name): string
 
 long_example(2, 3); // Prints "Hello, World!" and returns 5.
 short_example(2);   // Returns 7.
-</pre>
+</code></pre>
 
 <h2>Bash</h2>
-<pre data-file="example.sh" data-lang="bash">
+<pre><code class="language-bash" data-file="example.sh">
 #!/bin/bash
 read -p "Enter number : " n
 if test $n -ge 0
@@ -77,10 +77,10 @@ public function prefixName(string $name): string
 else
 	echo "$n number is negative number."
 fi
-</pre>
+</code></pre>
 
 <h2>Go</h2>
-<pre data-lang="go" data-file="main.go">
+<pre><code class="language-go" data-file="main.go">
 package main
 
 import "fmt"
@@ -104,9 +104,9 @@ public function prefixName(string $name): string
     fmt.Scanln()
     fmt.Println("done")
 }
-</pre>
+</code></pre>
 <h2>Xml</h2>
-<pre data-lang="xml" data-file="recipe.xml">
+<pre><code class="language-xml" data-file="recipe.xml">
 <?xml version="1.0" encoding="utf-8"?>
 <!DOCTYPE recipe>
 <recipe name="bread" preptime="5min" cooktime="180min">
@@ -130,10 +130,10 @@ public function prefixName(string $name): string
      </step>
    </instructions>
 </recipe>
-</pre>
+</code></pre>
 
 <h2>HTML</h2>
-<pre data-lang="html" data-file="index.html">
+<pre><code class="language-html" data-file="index.html">
 <!DOCTYPE html>
 <title>Title</title>
 
@@ -150,18 +150,17 @@ function $init() {return true;}
     Mix all ingredients and knead thoroughly.
   </div>
 </body>
-</pre>
+</code></pre>
 ';
 
 require_once '../vendor/autoload.php';
 
 use Demyanovs\PHPHighlight\Highlighter;
 use Demyanovs\PHPHighlight\Themes\ObsidianTheme;
 
-$highlighter = new Highlighter($text, ObsidianTheme::TITLE);
-// Configuration
-$highlighter->showLineNumbers(true);
-$highlighter->showActionPanel(true);
+$highlighter = (new Highlighter($text, ObsidianTheme::TITLE))
+        ->showLineNumbers(true)
+        ->showActionPanel(true);
 echo $highlighter->parse();
 
 ?>

examples/index.php

@@ -28,11 +28,13 @@
         <exclude name="SlevomatCodingStandard.Commenting.RequireOneLineDocComment.MultiLineDocComment"/>
         <exclude name="SlevomatCodingStandard.ControlStructures.EarlyExit.EarlyExitNotUsed"/>
         <exclude name="SlevomatCodingStandard.PHP.RequireExplicitAssertion.RequiredExplicitAssertion"/>
+        <exclude name="SlevomatCodingStandard.Classes.SuperfluousInterfaceNaming.SuperfluousSuffix"/>
         <exclude name="Generic.Formatting.SpaceAfterNot.Incorrect"/>
         <exclude name="Generic.Formatting.MultipleStatementAlignment.NotSame"/>
         <exclude name="Squiz.Functions.FunctionDeclarationArgumentSpacing.SpacingAfterHint"/>
         <exclude name="Squiz.Functions.MultiLineFunctionDeclaration.NewlineBeforeOpenBrace"/>
     </rule>
 
     <exclude-pattern>examples/</exclude-pattern>
+    <exclude-pattern>tests/</exclude-pattern>
 </ruleset>