summaryrefslogtreecommitdiff
path: root/includes/MediaTransformOutput.php
blob: 0367494fd6eaaa5ffd880f873028049121751840 (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
<?php
/**
 * @file
 * @ingroup Media
 */

/**
 * Base class for the output of MediaHandler::doTransform() and File::transform().
 *
 * @ingroup Media
 */
abstract class MediaTransformOutput {
	var $file, $width, $height, $url, $page, $path;

	/**
	 * Get the width of the output box
	 */
	function getWidth() {
		return $this->width;
	}

	/**
	 * Get the height of the output box
	 */
	function getHeight() {
		return $this->height;
	}

	/**
	 * @return string The thumbnail URL
	 */
	function getUrl() {
		return $this->url;
	}

	/**
	 * @return string Destination file path (local filesystem)
	 */
	function getPath() {
		return $this->path;
	}

	/**
	 * Fetch HTML for this transform output
	 *
	 * @param array $options Associative array of options. Boolean options
	 *     should be indicated with a value of true for true, and false or
	 *     absent for false.
	 *
	 *     alt          Alternate text or caption
	 *     desc-link    Boolean, show a description link
	 *     file-link    Boolean, show a file download link
	 *     custom-url-link    Custom URL to link to
	 *     custom-title-link  Custom Title object to link to
	 *     valign       vertical-align property, if the output is an inline element
	 *     img-class    Class applied to the <img> tag, if there is such a tag
	 *
	 * For images, desc-link and file-link are implemented as a click-through. For
	 * sounds and videos, they may be displayed in other ways.
	 *
	 * @return string
	 */
	abstract function toHtml( $options = array() );

	/**
	 * This will be overridden to return true in error classes
	 */
	function isError() {
		return false;
	}

	/**
	 * Wrap some XHTML text in an anchor tag with the given attributes
	 */
	protected function linkWrap( $linkAttribs, $contents ) {
		if ( $linkAttribs ) {
			return Xml::tags( 'a', $linkAttribs, $contents );
		} else {
			return $contents;
		}
	}

	function getDescLinkAttribs( $alt = false, $params = '' ) {
		$query = $this->page ? ( 'page=' . urlencode( $this->page ) ) : '';
		if( $params ) {
			$query .= $query ? '&'.$params : $params;
		}
		$title = $this->file->getTitle();
		if ( strval( $alt ) === '' ) {
			$alt = $title->getText();
		}
		return array(
			'href' => $this->file->getTitle()->getLocalURL( $query ),
			'class' => 'image',
			'title' => $alt
		);
	}
}


/**
 * Media transform output for images
 *
 * @ingroup Media
 */
class ThumbnailImage extends MediaTransformOutput {
	/**
	 * @param string $path Filesystem path to the thumb
	 * @param string $url URL path to the thumb
	 * @private
	 */
	function ThumbnailImage( $file, $url, $width, $height, $path = false, $page = false ) {
		$this->file = $file;
		$this->url = $url;
		# These should be integers when they get here.
		# If not, there's a bug somewhere.  But let's at
		# least produce valid HTML code regardless.
		$this->width = round( $width );
		$this->height = round( $height );
		$this->path = $path;
		$this->page = $page;
	}

	/**
	 * Return HTML <img ... /> tag for the thumbnail, will include
	 * width and height attributes and a blank alt text (as required).
	 *
	 * @param array $options Associative array of options. Boolean options
	 *     should be indicated with a value of true for true, and false or
	 *     absent for false.
	 *
	 *     alt          HTML alt attribute
	 *     title        HTML title attribute
	 *     desc-link    Boolean, show a description link
	 *     file-link    Boolean, show a file download link
	 *     valign       vertical-align property, if the output is an inline element
	 *     img-class    Class applied to the <img> tag, if there is such a tag
	 *     desc-query   String, description link query params
	 *     custom-url-link    Custom URL to link to
	 *     custom-title-link  Custom Title object to link to
	 *
	 * For images, desc-link and file-link are implemented as a click-through. For
	 * sounds and videos, they may be displayed in other ways.
	 *
	 * @return string
	 * @public
	 */
	function toHtml( $options = array() ) {
		if ( count( func_get_args() ) == 2 ) {
			throw new MWException( __METHOD__ .' called in the old style' );
		}

		$alt = empty( $options['alt'] ) ? '' : $options['alt'];
		# Note: if title is empty and alt is not, make the title empty, don't
		# use alt; only use alt if title is not set
		$title = !isset( $options['title'] ) ? $alt : $options['title'];		
		$query = empty($options['desc-query'])  ? '' : $options['desc-query'];

		if ( !empty( $options['custom-url-link'] ) ) {
			$linkAttribs = array( 'href' => $options['custom-url-link'] );
		} elseif ( !empty( $options['custom-title-link'] ) ) {
			$title = $options['custom-title-link'];
			$linkAttribs = array( 'href' => $title->getLinkUrl(), 'title' => $title->getFullText() );
		} elseif ( !empty( $options['desc-link'] ) ) {
			$linkAttribs = $this->getDescLinkAttribs( $title, $query );
		} elseif ( !empty( $options['file-link'] ) ) {
			$linkAttribs = array( 'href' => $this->file->getURL() );
		} else {
			$linkAttribs = false;
		}

		$attribs = array(
			'alt' => $alt,
			'src' => $this->url,
			'width' => $this->width,
			'height' => $this->height,
			'border' => 0,
		);
		if ( !empty( $options['valign'] ) ) {
			$attribs['style'] = "vertical-align: {$options['valign']}";
		}
		if ( !empty( $options['img-class'] ) ) {
			$attribs['class'] = $options['img-class'];
		}
		return $this->linkWrap( $linkAttribs, Xml::element( 'img', $attribs ) );
	}

}

/**
 * Basic media transform error class
 *
 * @ingroup Media
 */
class MediaTransformError extends MediaTransformOutput {
	var $htmlMsg, $textMsg, $width, $height, $url, $path;

	function __construct( $msg, $width, $height /*, ... */ ) {
		$args = array_slice( func_get_args(), 3 );
		$htmlArgs = array_map( 'htmlspecialchars', $args );
		$htmlArgs = array_map( 'nl2br', $htmlArgs );

		$this->htmlMsg = wfMsgReplaceArgs( htmlspecialchars( wfMsgGetKey( $msg, true ) ), $htmlArgs );
		$this->textMsg = wfMsgReal( $msg, $args );
		$this->width = intval( $width );
		$this->height = intval( $height );
		$this->url = false;
		$this->path = false;
	}

	function toHtml( $options = array() ) {
		return "<table class=\"MediaTransformError\" style=\"" .
			"width: {$this->width}px; height: {$this->height}px;\"><tr><td>" .
			$this->htmlMsg .
			"</td></tr></table>";
	}

	function toText() {
		return $this->textMsg;
	}

	function getHtmlMsg() {
		return $this->htmlMsg;
	}

	function isError() {
		return true;
	}
}

/**
 * Shortcut class for parameter validation errors
 *
 * @ingroup Media
 */
class TransformParameterError extends MediaTransformError {
	function __construct( $params ) {
		parent::__construct( 'thumbnail_error',
			max( isset( $params['width']  ) ? $params['width']  : 0, 180 ),
			max( isset( $params['height'] ) ? $params['height'] : 0, 180 ),
			wfMsg( 'thumbnail_invalid_params' ) );
	}
}