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CeleritySpriteGenerator.php
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Wed, Dec 25, 10:04

CeleritySpriteGenerator.php
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<?php
final class CeleritySpriteGenerator extends Phobject {
public function buildTokenSheet() {
$icons = $this->getDirectoryList('tokens_1x');
$scales = array(
'1x' => 1,
'2x' => 2,
);
$template = id(new PhutilSprite())
->setSourceSize(18, 18);
$sprites = array();
$prefix = 'tokens_';
foreach ($icons as $icon) {
$sprite = id(clone $template)
->setName('tokens-'.$icon)
->setTargetCSS('.tokens-'.$icon);
foreach ($scales as $scale_key => $scale) {
$path = $this->getPath($prefix.$scale_key.'/'.$icon.'.png');
$sprite->setSourceFile($path, $scale);
}
$sprites[] = $sprite;
}
$sheet = $this->buildSheet('tokens', true);
$sheet->setScales($scales);
foreach ($sprites as $sprite) {
$sheet->addSprite($sprite);
}
return $sheet;
}
public function buildLoginSheet() {
$icons = $this->getDirectoryList('login_1x');
$scales = array(
'1x' => 1,
'2x' => 2,
);
$template = id(new PhutilSprite())
->setSourceSize(28, 28);
$sprites = array();
$prefix = 'login_';
foreach ($icons as $icon) {
$sprite = id(clone $template)
->setName('login-'.$icon)
->setTargetCSS('.login-'.$icon);
foreach ($scales as $scale_key => $scale) {
$path = $this->getPath($prefix.$scale_key.'/'.$icon.'.png');
$sprite->setSourceFile($path, $scale);
}
$sprites[] = $sprite;
}
$sheet = $this->buildSheet('login', true);
$sheet->setScales($scales);
foreach ($sprites as $sprite) {
$sheet->addSprite($sprite);
}
return $sheet;
}
private function getPath($to_path = null) {
$root = dirname(phutil_get_library_root('phabricator'));
return $root.'/resources/sprite/'.$to_path;
}
private function getDirectoryList($dir) {
$path = $this->getPath($dir);
$result = array();
$images = Filesystem::listDirectory($path, $include_hidden = false);
foreach ($images as $image) {
if (!preg_match('/\.png$/', $image)) {
throw new Exception(
pht(
"Expected file '%s' in '%s' to be a sprite source ending in '%s'.",
$image,
$path,
'.png'));
}
$result[] = substr($image, 0, -4);
}
return $result;
}
private function buildSheet(
$name,
$has_retina,
$type = null,
$extra_css = '') {
$sheet = new PhutilSpriteSheet();
$at = '@';
switch ($type) {
case PhutilSpriteSheet::TYPE_STANDARD:
default:
$type = PhutilSpriteSheet::TYPE_STANDARD;
$repeat_rule = 'no-repeat';
break;
case PhutilSpriteSheet::TYPE_REPEAT_X:
$repeat_rule = 'repeat-x';
break;
case PhutilSpriteSheet::TYPE_REPEAT_Y:
$repeat_rule = 'repeat-y';
break;
}
$retina_rules = null;
if ($has_retina) {
$retina_rules = <<<EOCSS
@media
only screen and (min-device-pixel-ratio: 1.5),
only screen and (-webkit-min-device-pixel-ratio: 1.5),
only screen and (min-resolution: 1.5dppx) {
.sprite-{$name}{$extra_css} {
background-image: url(/rsrc/image/sprite-{$name}-X2.png);
background-size: {X}px {Y}px;
}
}
EOCSS;
}
$sheet->setSheetType($type);
$sheet->setCSSHeader(<<<EOCSS
/**
* @provides sprite-{$name}-css
* {$at}generated
*/
.sprite-{$name}{$extra_css} {
background-image: url(/rsrc/image/sprite-{$name}.png);
background-repeat: {$repeat_rule};
}
{$retina_rules}
EOCSS
);
return $sheet;
}
}

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