summaryrefslogtreecommitdiff
path: root/framework/Web/Javascripts/TJavaScript.php
blob: 7401e445d0c268648d810b02b51729648c872f74 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
<?php
/**
 * TJavaScript class file
 *
 * @author Wei Zhuo<weizhuo[at]gmail[dot]com>
 * @link http://www.pradosoft.com/
 * @copyright Copyright &copy; 2005-2015 PradoSoft
 * @license http://www.pradosoft.com/license/
 * @package System.Web.Javascripts
 */

/**
 * TJavaScript class.
 *
 * TJavaScript is a utility class containing commonly-used javascript-related
 * functions.
 *
 * @author Wei Zhuo<weizhuo[at]gmail[dot]com>
 * @package System.Web.Javascripts
 * @since 3.0
 */
class TJavaScript
{
	/**
	 * Renders a list of javascript files
	 * @param array URLs to the javascript files
	 * @return string rendering result
	 */
	public static function renderScriptFiles($files)
	{
		$str='';
		foreach($files as $file)
			$str.= self::renderScriptFile($file);
		return $str;
	}

	/**
	 * Renders a javascript file
	 * @param string URL to the javascript file
	 * @return string rendering result
	 */
	public static function renderScriptFile($file)
	{
		return '<script type="text/javascript" src="'.THttpUtility::htmlEncode($file)."\"></script>\n";
	}

	/**
	 * Renders a list of javascript blocks
	 * @param array javascript blocks
	 * @return string rendering result
	 */
	public static function renderScriptBlocks($scripts)
	{
		if(count($scripts))
			return "<script type=\"text/javascript\">\n/*<![CDATA[*/\n".implode("\n",$scripts)."\n/*]]>*/\n</script>\n";
		else
			return '';
	}

	/**
	 * Renders a list of javascript code
	 * @param array javascript blocks
	 * @return string rendering result
	 */
	public static function renderScriptBlocksCallback($scripts)
	{
		if(count($scripts))
			return implode("\n",$scripts)."\n";
		else
			return '';
	}

	/**
	 * Renders javascript block
	 * @param string javascript block
	 * @return string rendering result
	 */
	public static function renderScriptBlock($script)
	{
		return "<script type=\"text/javascript\">\n/*<![CDATA[*/\n{$script}\n/*]]>*/\n</script>\n";
	}

	/**
	 * Quotes a javascript string.
	 * After processing, the string is safely enclosed within a pair of
	 * quotation marks and can serve as a javascript string.
	 * @param string string to be quoted
	 * @return string the quoted string
	 */
	public static function quoteString($js)
	{
		return self::jsonEncode($js,JSON_HEX_QUOT | JSON_HEX_APOS | JSON_HEX_TAG);
	}

	/**
	 * @return Marks a string as a javascript function. Once marke, the string is considered as a
	 * raw javascript function that is not supposed to be encoded by {@link encode}
	 */
	public static function quoteJsLiteral($js)
	{
		if($js instanceof TJavaScriptLiteral)
			return $js;
		else
			return new TJavaScriptLiteral($js);
	}

	/**
	 * Deprecated, use {@link quoteJsLiteral} instead
	 */
	public static function quoteFunction($js)
	{
		return self::quoteJsLiteral($js);
	}

	/**
	 * @return boolean true if the parameter is marked as a javascript function, i.e. if it's considered as a
	 * raw javascript function that is not supposed to be encoded by {@link encode}
	 */
	public static function isJsLiteral($js)
	{
		return ($js instanceof TJavaScriptLiteral);
	}

	/**
	 * Deprecated, use {@link isJsLiteral} instead
	 */
	public static function isFunction($js)
	{
		return self::isJsLiteral($js);
	}

	/**
	 * Encodes a PHP variable into javascript representation.
	 *
	 * Example:
	 * <code>
	 * $options['onLoading'] = "doit";
	 * $options['onComplete'] = "more";
	 * echo TJavaScript::encode($options);
	 * //expects the following javascript code
	 * // {'onLoading':'doit','onComplete':'more'}
	 * </code>
	 *
	 * For higher complexity data structures use {@link jsonEncode} and {@link jsonDecode}
	 * to serialize and unserialize.
	 *
	 * @param mixed PHP variable to be encoded
	 * @param boolean whether the output is a map or a list.
	 * @since 3.1.5
	 * @param boolean wether to encode empty strings too. Default to false for BC.
	 * @return string the encoded string
	 */
	public static function encode($value,$toMap=true,$encodeEmptyStrings=false)
	{
		if(is_string($value))
			return self::quoteString($value);
		else if(is_bool($value))
			return $value?'true':'false';
		else if(is_array($value))
		{
			$results='';
			if(($n=count($value))>0 && array_keys($value)!==range(0,$n-1))
			{
				foreach($value as $k=>$v)
				{
					if($v!=='' || $encodeEmptyStrings)
					{
						if($results!=='')
							$results.=',';
						$results.="'$k':".self::encode($v,$toMap,$encodeEmptyStrings);
					}
				}
				return '{'.$results.'}';
			}
			else
			{
				foreach($value as $v)
				{
					if($v!=='' || $encodeEmptyStrings)
					{
						if($results!=='')
							$results.=',';
						$results.=self::encode($v,$toMap, $encodeEmptyStrings);
					}
				}
				return '['.$results.']';
			}
		}
		else if(is_integer($value))
			return "$value";
		else if(is_float($value))
		{
			switch($value)
			{
				case -INF:
					return 'Number.NEGATIVE_INFINITY';
					break;
				case INF:
					return 'Number.POSITIVE_INFINITY';
					break;
				default:
					$locale=localeConv();
					if($locale['decimal_point']=='.')
						return "$value";
					else
						return str_replace($locale['decimal_point'], '.', "$value");
					break;
			}
		}
		else if(is_object($value))
			if ($value instanceof TJavaScriptLiteral)
				return $value->toJavaScriptLiteral();
			else
				return self::encode(get_object_vars($value),$toMap);
		else if($value===null)
			return 'null';
		else
			return '';
	}
	/**
	 * Encodes a PHP variable into javascript string.
	 * This method invokes json_encode to perform the encoding.
	 * @param mixed variable to be encoded
	 * @return string encoded string
	 */
	public static function jsonEncode($value, $options = 0)
	{
		if (($g=Prado::getApplication()->getGlobalization(false))!==null &&
			strtoupper($enc=$g->getCharset())!='UTF-8') {
			self::convertToUtf8($value, $enc);
		}

		$s = @json_encode($value,$options);
		self::checkJsonError();
		return $s;
	}

	/**
	 * Encodes an string or the content of an array to UTF8
	 * @param string|array|mixed $value
	 * @param string $sourceEncoding
	 */
	private static function convertToUtf8(&$value, $sourceEncoding) {
		if(is_string($value))
			$value=iconv($sourceEncoding, 'UTF-8', $value);
		else if (is_array($value))
		{
			foreach($value as &$element)
				self::convertToUtf8($element, $sourceEncoding);
		}
	}

	/**
	 * Decodes a javascript string into PHP variable.
	 * This method invokes json_decode to perform the decoding.
	 * @param string string to be decoded
	 * @param bool whether to convert returned objects to associative arrays
	 * @param int recursion depth
	 * @return mixed decoded variable
	 */
	public static function jsonDecode($value, $assoc = false, $depth = 512)
	{
		$s= @json_decode($value, $assoc, $depth);
		self::checkJsonError();
		return $s;
	}

	private static function checkJsonError()
	{
		switch ($err = json_last_error())
		{
			case JSON_ERROR_NONE:
				return;
				break;
			case JSON_ERROR_DEPTH:
				$msg = 'Maximum stack depth exceeded';
				break;
			case JSON_ERROR_STATE_MISMATCH:
				$msg = 'Underflow or the modes mismatch';
				break;
			case JSON_ERROR_CTRL_CHAR:
				$msg = 'Unexpected control character found';
				break;
			case JSON_ERROR_SYNTAX:
				$msg = 'Syntax error, malformed JSON';
				break;
			case JSON_ERROR_UTF8:
				$msg = 'Malformed UTF-8 characters, possibly incorrectly encoded';
				break;
			default:
				$msg = 'Unknown error';
				break;
		}
		throw new Exception("JSON error ($err): $msg");
	}

	/**
	 * Minimize the size of a javascript script.
	 * This method is based on Douglas Crockford's JSMin.
	 * @param string code that you want to minimzie
	 * @return minimized version of the code
	 */
	public static function JSMin($code)
	{
		Prado::using('System.Web.Javascripts.JSMin');
		return JSMin::minify($code);
	}
}