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<?php
/* Icinga Web 2 | (c) 2013 Icinga Development Team | GPLv2+ */
namespace Icinga\Web;
use Icinga\Application\Logger;
use Icinga\Util\LessParser;
use Less_Exception_Parser;
/**
* Compile LESS into CSS
*
* Comments will be removed always. lessc is messing them up.
*/
class LessCompiler
{
/**
* lessphp compiler
*
* @var LessParser
*/
protected $lessc;
/**
* Array of LESS files
*
* @var string[]
*/
protected $lessFiles = array();
/**
* Array of module LESS files indexed by module names
*
* @var array[]
*/
protected $moduleLessFiles = array();
/**
* LESS source
*
* @var string
*/
protected $source;
/**
* Path of the LESS theme
*
* @var string
*/
protected $theme;
/**
* Path of the LESS theme mode
*
* @var string
*/
protected $themeMode;
/**
* Create a new LESS compiler
*/
public function __construct()
{
$this->lessc = new LessParser();
// Discourage usage of import because we're caching based on an explicit list of LESS files to compile
$this->lessc->importDisabled = true;
}
/**
* Add a Web 2 LESS file
*
* @param string $lessFile Path to the LESS file
*
* @return $this
*/
public function addLessFile($lessFile)
{
$this->lessFiles[] = realpath($lessFile);
return $this;
}
/**
* Add a module LESS file
*
* @param string $moduleName Name of the module
* @param string $lessFile Path to the LESS file
*
* @return $this
*/
public function addModuleLessFile($moduleName, $lessFile)
{
if (! isset($this->moduleLessFiles[$moduleName])) {
$this->moduleLessFiles[$moduleName] = array();
}
$this->moduleLessFiles[$moduleName][] = realpath($lessFile);
return $this;
}
/**
* Get the list of LESS files added to the compiler
*
* @return string[]
*/
public function getLessFiles()
{
$lessFiles = $this->lessFiles;
foreach ($this->moduleLessFiles as $moduleLessFiles) {
$lessFiles = array_merge($lessFiles, $moduleLessFiles);
}
if ($this->theme !== null) {
$lessFiles[] = $this->theme;
}
if ($this->themeMode !== null) {
$lessFiles[] = $this->themeMode;
}
return $lessFiles;
}
/**
* Set the path to the LESS theme
*
* @param ?string $theme Path to the LESS theme
*
* @return $this
*/
public function setTheme($theme)
{
if ($theme === null || (is_file($theme) && is_readable($theme))) {
$this->theme = $theme;
} else {
Logger::error('Can\t load theme %s. Make sure that the theme exists and is readable', $theme);
}
return $this;
}
/**
* Set the path to the LESS theme mode
*
* @param string $themeMode Path to the LESS theme mode
*
* @return $this
*/
public function setThemeMode($themeMode)
{
if (is_file($themeMode) && is_readable($themeMode)) {
$this->themeMode = $themeMode;
} else {
Logger::error('Can\t load theme mode %s. Make sure that the theme mode exists and is readable', $themeMode);
}
return $this;
}
/**
* Instruct the compiler to minify CSS
*
* @return $this
*/
public function compress()
{
$this->lessc->setFormatter('compressed');
return $this;
}
/**
* Render to CSS
*
* @return string
*/
public function render()
{
foreach ($this->lessFiles as $lessFile) {
$this->source .= file_get_contents($lessFile);
}
$moduleCss = '';
$exportedVars = [];
foreach ($this->moduleLessFiles as $moduleName => $moduleLessFiles) {
$moduleCss .= '.icinga-module.module-' . $moduleName . ' {';
foreach ($moduleLessFiles as $moduleLessFile) {
$content = file_get_contents($moduleLessFile);
$pattern = '/^@exports:\s*{((?:\s*@[^:}]+:[^;]*;\s+)+)};$/m';
if (preg_match_all($pattern, $content, $matches, PREG_SET_ORDER)) {
foreach ($matches as $match) {
$content = str_replace($match[0], '', $content);
foreach (explode("\n", trim($match[1])) as $line) {
list($name, $value) = explode(':', $line, 2);
$exportedVars[trim($name)] = trim($value, ' ;');
}
}
}
$moduleCss .= $content;
}
$moduleCss .= '}';
}
$this->source .= $moduleCss;
$varExports = '';
foreach ($exportedVars as $name => $value) {
$varExports .= sprintf("%s: %s;\n", $name, $value);
}
// exported vars are injected at the beginning to avoid that they are
// able to override other variables, that's what themes are for
$this->source = $varExports . "\n\n" . $this->source;
if ($this->theme !== null) {
$this->source .= file_get_contents($this->theme);
}
if ($this->themeMode !== null) {
$this->source .= file_get_contents($this->themeMode);
}
try {
return preg_replace(
'/(\.icinga-module\.module-[^\s]+) (#layout\.[^\s]+)/m',
'\2 \1',
$this->lessc->compile($this->source)
);
} catch (Less_Exception_Parser $e) {
$excerpt = substr($this->source, $e->index - 500, 1000);
$lines = [];
$found = false;
$pos = $e->index - 500;
foreach (explode("\n", $excerpt) as $i => $line) {
if ($i === 0) {
$pos += strlen($line);
$lines[] = '.. ' . $line;
} else {
$pos += strlen($line) + 1;
$sep = ' ';
if (! $found && $pos > $e->index) {
$found = true;
$sep = '!! ';
}
$lines[] = $sep . $line;
}
}
$lines[] = '..';
$excerpt = join("\n", $lines);
return sprintf("%s\n%s\n\n\n%s", $e->getMessage(), $e->getTraceAsString(), $excerpt);
}
}
}
|
