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- Veröffentlicht
- 06.01.2017
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ConfigOptimizer.php
01 <?php
02
03 /*
04 * @package s9e\TextFormatter
05 * @copyright Copyright (c) 2010-2016 The s9e Authors
06 * @license http://www.opensource.org/licenses/mit-license.php The MIT License
07 */
08 namespace s9e\TextFormatter\Configurator\JavaScript;
09 class ConfigOptimizer
10 {
11 protected $configValues;
12 protected $encoder;
13 protected $jsLengths;
14 public function __construct(Encoder $encoder)
15 {
16 $this->encoder = $encoder;
17 $this->reset();
18 }
19 public function getVarDeclarations()
20 {
21 \asort($this->jsLengths);
22 $src = '';
23 foreach (\array_keys($this->jsLengths) as $varName)
24 {
25 $configValue = $this->configValues[$varName];
26 if ($configValue->isDeduplicated())
27 $src .= '/** @const */ var ' . $varName . '=' . $this->encoder->encode($configValue->getValue()) . ";\n";
28 }
29 return $src;
30 }
31 public function optimize($object)
32 {
33 return \current($this->optimizeObjectContent(array($object)))->getValue();
34 }
35 public function reset()
36 {
37 $this->configValues = array();
38 $this->jsLengths = array();
39 }
40 protected function canDeduplicate($value)
41 {
42 return (\is_array($value) || $value instanceof Code || $value instanceof Dictionary);
43 }
44 protected function deduplicateConfigValues()
45 {
46 \arsort($this->jsLengths);
47 foreach (\array_keys($this->jsLengths) as $varName)
48 {
49 $configValue = $this->configValues[$varName];
50 if ($configValue->getUseCount() > 1)
51 $configValue->deduplicate();
52 }
53 }
54 protected function getVarName($js)
55 {
56 return \sprintf('o%08X', \crc32($js));
57 }
58 protected function isIterable($value)
59 {
60 return (\is_array($value) || $value instanceof Dictionary);
61 }
62 protected function optimizeObjectContent($object)
63 {
64 $object = $this->recordObject($object);
65 $this->deduplicateConfigValues();
66 return $object->getValue();
67 }
68 protected function recordObject($object)
69 {
70 $js = $this->encoder->encode($object);
71 $varName = $this->getVarName($js);
72 if ($this->isIterable($object))
73 $object = $this->recordObjectContent($object);
74 if (!isset($this->configValues[$varName]))
75 {
76 $this->configValues[$varName] = new ConfigValue($object, $varName);
77 $this->jsLengths[$varName] = \strlen($js);
78 }
79 $this->configValues[$varName]->incrementUseCount();
80 return $this->configValues[$varName];
81 }
82 protected function recordObjectContent($object)
83 {
84 foreach ($object as $k => $v)
85 if ($this->canDeduplicate($v) && !$this->shouldPreserve($v))
86 $object[$k] = $this->recordObject($v);
87 return $object;
88 }
89 protected function shouldPreserve($value)
90 {
91 return ($value instanceof Code && \preg_match('(^\\w+$)', $value));
92 }
93 }