WordPressを読む　98-3 /blog/wp-includes/default-widgets.php 3

2014/12/04

/blog/wp-includes/default-widgets.php 3

/**
 * RSS widget class
 *
 * @since 2.8.0
 */
class WP_Widget_RSS extends WP_Widget {

	public function __construct() {
		$widget_ops = array( 'description' => __('Entries from any RSS or Atom feed.') );
		$control_ops = array( 'width' => 400, 'height' => 200 );
		parent::__construct( 'rss', __('RSS'), $widget_ops, $control_ops );
	}

	public function widget($args, $instance) {

		if ( isset($instance['error']) && $instance['error'] )
			return;

		$url = ! empty( $instance['url'] ) ? $instance['url'] : '';
		while ( stristr($url, 'http') != $url )
			$url = substr($url, 1);

		if ( empty($url) )
			return;

		// self-url destruction sequence
		if ( in_array( untrailingslashit( $url ), array( site_url(), home_url() ) ) )
			return;

		$rss = fetch_feed($url);
		$title = $instance['title'];
		$desc = '';
		$link = '';

		if ( ! is_wp_error($rss) ) {
			$desc = esc_attr(strip_tags(@html_entity_decode($rss->get_description(), ENT_QUOTES, get_option('blog_charset'))));
			if ( empty($title) )
				$title = esc_html(strip_tags($rss->get_title()));
			$link = esc_url(strip_tags($rss->get_permalink()));
			while ( stristr($link, 'http') != $link )
				$link = substr($link, 1);
		}

		if ( empty($title) )
			$title = empty($desc) ? __('Unknown Feed') : $desc;

		/** This filter is documented in wp-includes/default-widgets.php */
		$title = apply_filters( 'widget_title', $title, $instance, $this->id_base );

		$url = esc_url(strip_tags($url));
		$icon = includes_url('images/rss.png');
		if ( $title )
			$title = "<a class='rsswidget' href='$url'><img style='border:0' width='14' height='14' src='$icon' alt='RSS' /></a> <a class='rsswidget' href='$link'>$title</a>";

		echo $args['before_widget'];
		if ( $title ) {
			echo $args['before_title'] . $title . $args['after_title'];
		}
		wp_widget_rss_output( $rss, $instance );
		echo $args['after_widget'];

		if ( ! is_wp_error($rss) )
			$rss->__destruct();
		unset($rss);
	}

	public function update($new_instance, $old_instance) {
		$testurl = ( isset( $new_instance['url'] ) && ( !isset( $old_instance['url'] ) || ( $new_instance['url'] != $old_instance['url'] ) ) );
		return wp_widget_rss_process( $new_instance, $testurl );
	}

	public function form($instance) {

		if ( empty($instance) )
			$instance = array( 'title' => '', 'url' => '', 'items' => 10, 'error' => false, 'show_summary' => 0, 'show_author' => 0, 'show_date' => 0 );
		$instance['number'] = $this->number;

		wp_widget_rss_form( $instance );
	}
}

/**
 * Display the RSS entries in a list.
 *
 * @since 2.5.0
 *
 * @param string|array|object $rss RSS url.
 * @param array $args Widget arguments.
 */
function wp_widget_rss_output( $rss, $args = array() ) {
	if ( is_string( $rss ) ) {
		$rss = fetch_feed($rss);
	} elseif ( is_array($rss) && isset($rss['url']) ) {
		$args = $rss;
		$rss = fetch_feed($rss['url']);
	} elseif ( !is_object($rss) ) {
		return;
	}

	if ( is_wp_error($rss) ) {
		if ( is_admin() || current_user_can('manage_options') )
			echo '<p>' . sprintf( __('<strong>RSS Error</strong>: %s'), $rss->get_error_message() ) . '</p>';
		return;
	}

	$default_args = array( 'show_author' => 0, 'show_date' => 0, 'show_summary' => 0, 'items' => 0 );
	$args = wp_parse_args( $args, $default_args );

	$items = (int) $args['items'];
	if ( $items < 1 || 20 < $items )
		$items = 10;
	$show_summary  = (int) $args['show_summary'];
	$show_author   = (int) $args['show_author'];
	$show_date     = (int) $args['show_date'];

	if ( !$rss->get_item_quantity() ) {
		echo '<ul><li>' . __( 'An error has occurred, which probably means the feed is down. Try again later.' ) . '</li></ul>';
		$rss->__destruct();
		unset($rss);
		return;
	}

	echo '<ul>';
	foreach ( $rss->get_items( 0, $items ) as $item ) {
		$link = $item->get_link();
		while ( stristr( $link, 'http' ) != $link ) {
			$link = substr( $link, 1 );
		}
		$link = esc_url( strip_tags( $link ) );

		$title = esc_html( trim( strip_tags( $item->get_title() ) ) );
		if ( empty( $title ) ) {
			$title = __( 'Untitled' );
		}

		$desc = @html_entity_decode( $item->get_description(), ENT_QUOTES, get_option( 'blog_charset' ) );
		$desc = esc_attr( wp_trim_words( $desc, 55, ' [&hellip;]' ) );

		$summary = '';
		if ( $show_summary ) {
			$summary = $desc;

			// Change existing [...] to [&hellip;].
			if ( '[...]' == substr( $summary, -5 ) ) {
				$summary = substr( $summary, 0, -5 ) . '[&hellip;]';
			}

			$summary = '<div class="rssSummary">' . esc_html( $summary ) . '</div>';
		}

		$date = '';
		if ( $show_date ) {
			$date = $item->get_date( 'U' );

			if ( $date ) {
				$date = ' <span class="rss-date">' . date_i18n( get_option( 'date_format' ), $date ) . '</span>';
			}
		}

		$author = '';
		if ( $show_author ) {
			$author = $item->get_author();
			if ( is_object($author) ) {
				$author = $author->get_name();
				$author = ' <cite>' . esc_html( strip_tags( $author ) ) . '</cite>';
			}
		}

		if ( $link == '' ) {
			echo "<li>$title{$date}{$summary}{$author}</li>";
		} elseif ( $show_summary ) {
			echo "<li><a class='rsswidget' href='$link'>$title</a>{$date}{$summary}{$author}</li>";
		} else {
			echo "<li><a class='rsswidget' href='$link'>$title</a>{$date}{$author}</li>";
		}
	}
	echo '</ul>';
	$rss->__destruct();
	unset($rss);
}

/**
 * Display RSS widget options form.
 *
 * The options for what fields are displayed for the RSS form are all booleans
 * and are as follows: 'url', 'title', 'items', 'show_summary', 'show_author',
 * 'show_date'.
 *
 * @since 2.5.0
 *
 * @param array|string $args Values for input fields.
 * @param array $inputs Override default display options.
 */
function wp_widget_rss_form( $args, $inputs = null ) {
	$default_inputs = array( 'url' => true, 'title' => true, 'items' => true, 'show_summary' => true, 'show_author' => true, 'show_date' => true );
	$inputs = wp_parse_args( $inputs, $default_inputs );

	$args['number'] = esc_attr( $args['number'] );
	$args['title'] = isset( $args['title'] ) ? esc_attr( $args['title'] ) : '';
	$args['url'] = isset( $args['url'] ) ? esc_url( $args['url'] ) : '';
	$args['items'] = isset( $args['items'] ) ? (int) $args['items'] : 0;

	if ( $args['items'] < 1 || 20 < $args['items'] ) {
		$args['items'] = 10;
	}

	$args['show_summary']   = isset( $args['show_summary'] ) ? (int) $args['show_summary'] : (int) $inputs['show_summary'];
	$args['show_author']    = isset( $args['show_author'] ) ? (int) $args['show_author'] : (int) $inputs['show_author'];
	$args['show_date']      = isset( $args['show_date'] ) ? (int) $args['show_date'] : (int) $inputs['show_date'];

	if ( ! empty( $args['error'] ) ) {
		echo '<p class="widget-error"><strong>' . sprintf( __( 'RSS Error: %s' ), $args['error'] ) . '</strong></p>';
	}

	if ( $inputs['url'] ) :
?>
	<p><label for="rss-url-<?php echo $args['number']; ?>"><?php _e( 'Enter the RSS feed URL here:' ); ?></label>
	<input class="widefat" id="rss-url-<?php echo $args['number']; ?>" name="widget-rss[<?php echo $args['number']; ?>][url]" type="text" value="<?php echo $args['url']; ?>" /></p>
<?php endif; if ( $inputs['title'] ) : ?>
	<p><label for="rss-title-<?php echo $args['number']; ?>"><?php _e( 'Give the feed a title (optional):' ); ?></label>
	<input class="widefat" id="rss-title-<?php echo $args['number']; ?>" name="widget-rss[<?php echo $args['number']; ?>][title]" type="text" value="<?php echo $args['title']; ?>" /></p>
<?php endif; if ( $inputs['items'] ) : ?>
	<p><label for="rss-items-<?php echo $args['number']; ?>"><?php _e( 'How many items would you like to display?' ); ?></label>
	<select id="rss-items-<?php echo $args['number']; ?>" name="widget-rss[<?php echo $args['number']; ?>][items]">
<?php
		for ( $i = 1; $i <= 20; ++$i ) {
			echo "<option value='$i' " . selected( $args['items'], $i, false ) . ">$i</option>";
		}
?>
	</select></p>
<?php endif; if ( $inputs['show_summary'] ) : ?>
	<p><input id="rss-show-summary-<?php echo $args['number']; ?>" name="widget-rss[<?php echo $args['number']; ?>][show_summary]" type="checkbox" value="1" <?php checked( $args['show_summary'] ); ?> />
	<label for="rss-show-summary-<?php echo $args['number']; ?>"><?php _e( 'Display item content?' ); ?></label></p>
<?php endif; if ( $inputs['show_author'] ) : ?>
	<p><input id="rss-show-author-<?php echo $args['number']; ?>" name="widget-rss[<?php echo $args['number']; ?>][show_author]" type="checkbox" value="1" <?php checked( $args['show_author'] ); ?> />
	<label for="rss-show-author-<?php echo $args['number']; ?>"><?php _e( 'Display item author if available?' ); ?></label></p>
<?php endif; if ( $inputs['show_date'] ) : ?>
	<p><input id="rss-show-date-<?php echo $args['number']; ?>" name="widget-rss[<?php echo $args['number']; ?>][show_date]" type="checkbox" value="1" <?php checked( $args['show_date'] ); ?>/>
	<label for="rss-show-date-<?php echo $args['number']; ?>"><?php _e( 'Display item date?' ); ?></label></p>
<?php
	endif;
	foreach ( array_keys($default_inputs) as $input ) :
		if ( 'hidden' === $inputs[$input] ) :
			$id = str_replace( '_', '-', $input );
?>
	<input type="hidden" id="rss-<?php echo $id; ?>-<?php echo $args['number']; ?>" name="widget-rss[<?php echo $args['number']; ?>][<?php echo $input; ?>]" value="<?php echo $args[ $input ]; ?>" />
<?php
		endif;
	endforeach;
}

/**
 * Process RSS feed widget data and optionally retrieve feed items.
 *
 * The feed widget can not have more than 20 items or it will reset back to the
 * default, which is 10.
 *
 * The resulting array has the feed title, feed url, feed link (from channel),
 * feed items, error (if any), and whether to show summary, author, and date.
 * All respectively in the order of the array elements.
 *
 * @since 2.5.0
 *
 * @param array $widget_rss RSS widget feed data. Expects unescaped data.
 * @param bool $check_feed Optional, default is true. Whether to check feed for errors.
 * @return array
 */
function wp_widget_rss_process( $widget_rss, $check_feed = true ) {
	$items = (int) $widget_rss['items'];
	if ( $items < 1 || 20 < $items )
		$items = 10;
	$url           = esc_url_raw( strip_tags( $widget_rss['url'] ) );
	$title         = isset( $widget_rss['title'] ) ? trim( strip_tags( $widget_rss['title'] ) ) : '';
	$show_summary  = isset( $widget_rss['show_summary'] ) ? (int) $widget_rss['show_summary'] : 0;
	$show_author   = isset( $widget_rss['show_author'] ) ? (int) $widget_rss['show_author'] :0;
	$show_date     = isset( $widget_rss['show_date'] ) ? (int) $widget_rss['show_date'] : 0;

	if ( $check_feed ) {
		$rss = fetch_feed($url);
		$error = false;
		$link = '';
		if ( is_wp_error($rss) ) {
			$error = $rss->get_error_message();
		} else {
			$link = esc_url(strip_tags($rss->get_permalink()));
			while ( stristr($link, 'http') != $link )
				$link = substr($link, 1);

			$rss->__destruct();
			unset($rss);
		}
	}

	return compact( 'title', 'url', 'link', 'items', 'error', 'show_summary', 'show_author', 'show_date' );
}

/**
 * Tag cloud widget class
 *
 * @since 2.8.0
 */
class WP_Widget_Tag_Cloud extends WP_Widget {

	public function __construct() {
		$widget_ops = array( 'description' => __( "A cloud of your most used tags.") );
		parent::__construct('tag_cloud', __('Tag Cloud'), $widget_ops);
	}

	public function widget( $args, $instance ) {
		$current_taxonomy = $this->_get_current_taxonomy($instance);
		if ( !empty($instance['title']) ) {
			$title = $instance['title'];
		} else {
			if ( 'post_tag' == $current_taxonomy ) {
				$title = __('Tags');
			} else {
				$tax = get_taxonomy($current_taxonomy);
				$title = $tax->labels->name;
			}
		}

		/** This filter is documented in wp-includes/default-widgets.php */
		$title = apply_filters( 'widget_title', $title, $instance, $this->id_base );

		echo $args['before_widget'];
		if ( $title ) {
			echo $args['before_title'] . $title . $args['after_title'];
		}
		echo '<div class="tagcloud">';

		/**
		 * Filter the taxonomy used in the Tag Cloud widget.
		 *
		 * @since 2.8.0
		 * @since 3.0.0 Added taxonomy drop-down.
		 *
		 * @see wp_tag_cloud()
		 *
		 * @param array $current_taxonomy The taxonomy to use in the tag cloud. Default 'tags'.
		 */
		wp_tag_cloud( apply_filters( 'widget_tag_cloud_args', array(
			'taxonomy' => $current_taxonomy
		) ) );

		echo "</div>\n";
		echo $args['after_widget'];
	}

	public function update( $new_instance, $old_instance ) {
		$instance['title'] = strip_tags(stripslashes($new_instance['title']));
		$instance['taxonomy'] = stripslashes($new_instance['taxonomy']);
		return $instance;
	}

	public function form( $instance ) {
		$current_taxonomy = $this->_get_current_taxonomy($instance);
?>
	<p><label for="<?php echo $this->get_field_id('title'); ?>"><?php _e('Title:') ?></label>
	<input type="text" class="widefat" id="<?php echo $this->get_field_id('title'); ?>" name="<?php echo $this->get_field_name('title'); ?>" value="<?php if (isset ( $instance['title'])) {echo esc_attr( $instance['title'] );} ?>" /></p>
	<p><label for="<?php echo $this->get_field_id('taxonomy'); ?>"><?php _e('Taxonomy:') ?></label>
	<select class="widefat" id="<?php echo $this->get_field_id('taxonomy'); ?>" name="<?php echo $this->get_field_name('taxonomy'); ?>">
	<?php foreach ( get_taxonomies() as $taxonomy ) :
				$tax = get_taxonomy($taxonomy);
				if ( !$tax->show_tagcloud || empty($tax->labels->name) )
					continue;
	?>
		<option value="<?php echo esc_attr($taxonomy) ?>" <?php selected($taxonomy, $current_taxonomy) ?>><?php echo $tax->labels->name; ?></option>
	<?php endforeach; ?>
	</select></p><?php
	}

	public function _get_current_taxonomy($instance) {
		if ( !empty($instance['taxonomy']) && taxonomy_exists($instance['taxonomy']) )
			return $instance['taxonomy'];

		return 'post_tag';
	}
}

/**
 * Navigation Menu widget class
 *
 * @since 3.0.0
 */
 class WP_Nav_Menu_Widget extends WP_Widget {

	public function __construct() {
		$widget_ops = array( 'description' => __('Add a custom menu to your sidebar.') );
		parent::__construct( 'nav_menu', __('Custom Menu'), $widget_ops );
	}

	public function widget($args, $instance) {
		// Get menu
		$nav_menu = ! empty( $instance['nav_menu'] ) ? wp_get_nav_menu_object( $instance['nav_menu'] ) : false;

		if ( !$nav_menu )
			return;

		/** This filter is documented in wp-includes/default-widgets.php */
		$instance['title'] = apply_filters( 'widget_title', empty( $instance['title'] ) ? '' : $instance['title'], $instance, $this->id_base );

		echo $args['before_widget'];

		if ( !empty($instance['title']) )
			echo $args['before_title'] . $instance['title'] . $args['after_title'];

		wp_nav_menu( array( 'fallback_cb' => '', 'menu' => $nav_menu ) );

		echo $args['after_widget'];
	}

	public function update( $new_instance, $old_instance ) {
		$instance = array();
		if ( ! empty( $new_instance['title'] ) ) {
			$instance['title'] = strip_tags( stripslashes($new_instance['title']) );
		}
		if ( ! empty( $new_instance['nav_menu'] ) ) {
			$instance['nav_menu'] = (int) $new_instance['nav_menu'];
		}
		return $instance;
	}

	public function form( $instance ) {
		$title = isset( $instance['title'] ) ? $instance['title'] : '';
		$nav_menu = isset( $instance['nav_menu'] ) ? $instance['nav_menu'] : '';

		// Get menus
		$menus = wp_get_nav_menus( array( 'orderby' => 'name' ) );

		// If no menus exists, direct the user to go and create some.
		if ( !$menus ) {
			echo '<p>'. sprintf( __('No menus have been created yet. <a href="%s">Create some</a>.'), admin_url('nav-menus.php') ) .'</p>';
			return;
		}
		?>
		<p>
			<label for="<?php echo $this->get_field_id('title'); ?>"><?php _e('Title:') ?></label>
			<input type="text" class="widefat" id="<?php echo $this->get_field_id('title'); ?>" name="<?php echo $this->get_field_name('title'); ?>" value="<?php echo $title; ?>" />
		</p>
		<p>
			<label for="<?php echo $this->get_field_id('nav_menu'); ?>"><?php _e('Select Menu:'); ?></label>
			<select id="<?php echo $this->get_field_id('nav_menu'); ?>" name="<?php echo $this->get_field_name('nav_menu'); ?>">
				<option value="0"><?php _e( '&mdash; Select &mdash;' ) ?></option>
		<?php
			foreach ( $menus as $menu ) {
				echo '<option value="' . $menu->term_id . '"'
					. selected( $nav_menu, $menu->term_id, false )
					. '>'. esc_html( $menu->name ) . '</option>';
			}
		?>
			</select>
		</p>
		<?php
	}
}

/**
 * Register all of the default WordPress widgets on startup.
 *
 * Calls 'widgets_init' action after all of the WordPress widgets have been
 * registered.
 *
 * @since 2.2.0
 */
function wp_widgets_init() {
	if ( !is_blog_installed() )
		return;

	register_widget('WP_Widget_Pages');

	register_widget('WP_Widget_Calendar');

	register_widget('WP_Widget_Archives');

	if ( get_option( 'link_manager_enabled' ) )
		register_widget('WP_Widget_Links');

	register_widget('WP_Widget_Meta');

	register_widget('WP_Widget_Search');

	register_widget('WP_Widget_Text');

	register_widget('WP_Widget_Categories');

	register_widget('WP_Widget_Recent_Posts');

	register_widget('WP_Widget_Recent_Comments');

	register_widget('WP_Widget_RSS');

	register_widget('WP_Widget_Tag_Cloud');

	register_widget('WP_Nav_Menu_Widget');

	/**
	 * Fires after all default WordPress widgets have been registered.
	 *
	 * @since 2.2.0
	 */
	do_action( 'widgets_init' );
}

add_action('init', 'wp_widgets_init', 1);

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

310

311

312

313

314

315

316

317

318

319

320

321

322

323

324

325

326

327

328

329

330

331

332

333

334

335

336

337

338

339

340

341

342

343

344

345

346

347

348

349

350

351

352

353

354

355

356

357

358

359

360

361

362

363

364

365

366

367

368

369

370

371

372

373

374

375

376

377

378

379

380

381

382

383

384

385

386

387

388

389

390

391

392

393

394

395

396

397

398

399

400

401

402

403

404

405

406

407

408

409

410

411

412

413

414

415

416

417

418

419

420

421

422

423

424

425

426

427

428

429

430

431

432

433

434

435

436

437

438

439

440

441

442

443

444

445

446

447

448

449

450

451

452

453

454

455

456

457

458

459

460

461

462

463

464

465

466

467

468

469

470

471

472

473

474

475

476

477

478

479

480

481

482

483

484

485

486

487

488

489

490

491

492

493

494

495

496

497

498

499

500

501

502

503

504

/**

* RSS widget class

* @since 2.8.0

class WP_Widget_RSS extends WP_Widget {

public function __construct() {

$widget_ops = array( 'description' => __('Entries from any RSS or Atom feed.') );

$control_ops = array( 'width' => 400, 'height' => 200 );

parent::__construct( 'rss', __('RSS'), $widget_ops, $control_ops );

}

public function widget($args, $instance) {

if ( isset($instance['error']) && $instance['error'] )

return;

$url = ! empty( $instance['url'] ) ? $instance['url'] : '';

while ( stristr($url, 'http') != $url )

$url = substr($url, 1);

if ( empty($url) )

return;

// self-url destruction sequence

if ( in_array( untrailingslashit( $url ), array( site_url(), home_url() ) ) )

return;

$rss = fetch_feed($url);

$title = $instance['title'];

$desc = '';

$link = '';

if ( ! is_wp_error($rss) ) {

$desc = esc_attr(strip_tags(@html_entity_decode($rss->get_description(), ENT_QUOTES, get_option('blog_charset'))));

if ( empty($title) )

$title = esc_html(strip_tags($rss->get_title()));

$link = esc_url(strip_tags($rss->get_permalink()));

while ( stristr($link, 'http') != $link )

$link = substr($link, 1);

}

if ( empty($title) )

$title = empty($desc) ? __('Unknown Feed') : $desc;

/** This filter is documented in wp-includes/default-widgets.php */

$title = apply_filters( 'widget_title', $title, $instance, $this->id_base );

$url = esc_url(strip_tags($url));

$icon = includes_url('images/rss.png');

if ( $title )

$title = "<a class='rsswidget' href='$url'><img style='border:0' width='14' height='14' src='$icon' alt='RSS' /></a> <a class='rsswidget' href='$link'>$title</a>";

echo $args['before_widget'];

if ( $title ) {

echo $args['before_title'] . $title . $args['after_title'];

}

wp_widget_rss_output( $rss, $instance );

echo $args['after_widget'];

if ( ! is_wp_error($rss) )

$rss->__destruct();

unset($rss);

}

public function update($new_instance, $old_instance) {

$testurl = ( isset( $new_instance['url'] ) && ( !isset( $old_instance['url'] ) || ( $new_instance['url'] != $old_instance['url'] ) ) );

return wp_widget_rss_process( $new_instance, $testurl );

}

public function form($instance) {

if ( empty($instance) )

$instance = array( 'title' => '', 'url' => '', 'items' => 10, 'error' => false, 'show_summary' => 0, 'show_author' => 0, 'show_date' => 0 );

$instance['number'] = $this->number;

wp_widget_rss_form( $instance );

}

/**

* Display the RSS entries in a list.

* @since 2.5.0

* @param string|array|object $rss RSS url.

* @param array $args Widget arguments.

function wp_widget_rss_output( $rss, $args = array() ) {

if ( is_string( $rss ) ) {

$rss = fetch_feed($rss);

} elseif ( is_array($rss) && isset($rss['url']) ) {

$args = $rss;

$rss = fetch_feed($rss['url']);

} elseif ( !is_object($rss) ) {

return;

}

if ( is_wp_error($rss) ) {

if ( is_admin() || current_user_can('manage_options') )

echo '<p>' . sprintf( __('<strong>RSS Error</strong>: %s'), $rss->get_error_message() ) . '</p>';

return;

}

$default_args = array( 'show_author' => 0, 'show_date' => 0, 'show_summary' => 0, 'items' => 0 );

$args = wp_parse_args( $args, $default_args );

$items = (int) $args['items'];

if ( $items < 1 || 20 < $items )

$items = 10;

$show_summary = (int) $args['show_summary'];

$show_author = (int) $args['show_author'];

$show_date = (int) $args['show_date'];

if ( !$rss->get_item_quantity() ) {

echo '<ul><li>' . __( 'An error has occurred, which probably means the feed is down. Try again later.' ) . '</li></ul>';

$rss->__destruct();

unset($rss);

return;

}

echo '<ul>';

foreach ( $rss->get_items( 0, $items ) as $item ) {

$link = $item->get_link();

while ( stristr( $link, 'http' ) != $link ) {

$link = substr( $link, 1 );

}

$link = esc_url( strip_tags( $link ) );

$title = esc_html( trim( strip_tags( $item->get_title() ) ) );

if ( empty( $title ) ) {

$title = __( 'Untitled' );

}

$desc = @html_entity_decode( $item->get_description(), ENT_QUOTES, get_option( 'blog_charset' ) );

$desc = esc_attr( wp_trim_words( $desc, 55, ' […]' ) );

$summary = '';

if ( $show_summary ) {

$summary = $desc;

// Change existing [...] to […].

if ( '[...]' == substr( $summary, -5 ) ) {

$summary = substr( $summary, 0, -5 ) . '[…]';

}

$summary = '<div class="rssSummary">' . esc_html( $summary ) . '</div>';

}

$date = '';

if ( $show_date ) {

$date = $item->get_date( 'U' );

if ( $date ) {

$date = ' <span class="rss-date">' . date_i18n( get_option( 'date_format' ), $date ) . '</span>';

}

$author = '';

if ( $show_author ) {

$author = $item->get_author();

if ( is_object($author) ) {

$author = $author->get_name();

$author = ' <cite>' . esc_html( strip_tags( $author ) ) . '</cite>';

}

if ( $link == '' ) {

echo "<li>$title{$date}{$summary}{$author}</li>";

} elseif ( $show_summary ) {

echo "<li><a class='rsswidget' href='$link'>$title</a>{$date}{$summary}{$author}</li>";

} else {

echo "<li><a class='rsswidget' href='$link'>$title</a>{$date}{$author}</li>";

}

echo '</ul>';

$rss->__destruct();

unset($rss);

}

/**

* Display RSS widget options form.

* The options for what fields are displayed for the RSS form are all booleans

* and are as follows: 'url', 'title', 'items', 'show_summary', 'show_author',

* 'show_date'.

* @since 2.5.0

* @param array|string $args Values for input fields.

* @param array $inputs Override default display options.

function wp_widget_rss_form( $args, $inputs = null ) {

$default_inputs = array( 'url' => true, 'title' => true, 'items' => true, 'show_summary' => true, 'show_author' => true, 'show_date' => true );

$inputs = wp_parse_args( $inputs, $default_inputs );

$args['number'] = esc_attr( $args['number'] );

$args['title'] = isset( $args['title'] ) ? esc_attr( $args['title'] ) : '';

$args['url'] = isset( $args['url'] ) ? esc_url( $args['url'] ) : '';

$args['items'] = isset( $args['items'] ) ? (int) $args['items'] : 0;

if ( $args['items'] < 1 || 20 < $args['items'] ) {

$args['items'] = 10;

}

$args['show_summary'] = isset( $args['show_summary'] ) ? (int) $args['show_summary'] : (int) $inputs['show_summary'];

$args['show_author'] = isset( $args['show_author'] ) ? (int) $args['show_author'] : (int) $inputs['show_author'];

$args['show_date'] = isset( $args['show_date'] ) ? (int) $args['show_date'] : (int) $inputs['show_date'];

if ( ! empty( $args['error'] ) ) {

echo '<p class="widget-error"><strong>' . sprintf( __( 'RSS Error: %s' ), $args['error'] ) . '</strong></p>';

}

if ( $inputs['url'] ) :

<input class="widefat" id="rss-url-<?php echo $args['number']; ?>" name="widget-rss[<?php echo $args['number']; ?>][url]" type="text" value="<?php echo $args['url']; ?>" /></p>

<?php endif; if ( $inputs['title'] ) : ?>

<input class="widefat" id="rss-title-<?php echo $args['number']; ?>" name="widget-rss[<?php echo $args['number']; ?>][title]" type="text" value="<?php echo $args['title']; ?>" /></p>

<?php endif; if ( $inputs['items'] ) : ?>

<select id="rss-items-<?php echo $args['number']; ?>" name="widget-rss[<?php echo $args['number']; ?>][items]">

<?php

for ( $i = 1; $i <= 20; ++$i ) {

echo "<option value='$i' " . selected( $args['items'], $i, false ) . ">$i</option>";

}

</select></p>

<?php endif; if ( $inputs['show_summary'] ) : ?>

<p><input id="rss-show-summary-<?php echo $args['number']; ?>" name="widget-rss[<?php echo $args['number']; ?>][show_summary]" type="checkbox" value="1" <?php checked( $args['show_summary'] ); ?> />

<?php endif; if ( $inputs['show_author'] ) : ?>

<p><input id="rss-show-author-<?php echo $args['number']; ?>" name="widget-rss[<?php echo $args['number']; ?>][show_author]" type="checkbox" value="1" <?php checked( $args['show_author'] ); ?> />

<?php endif; if ( $inputs['show_date'] ) : ?>

<p><input id="rss-show-date-<?php echo $args['number']; ?>" name="widget-rss[<?php echo $args['number']; ?>][show_date]" type="checkbox" value="1" <?php checked( $args['show_date'] ); ?>/>

<?php

endif;

foreach ( array_keys($default_inputs) as $input ) :

if ( 'hidden' === $inputs[$input] ) :

$id = str_replace( '_', '-', $input );

<input type="hidden" id="rss-<?php echo $id; ?>-<?php echo $args['number']; ?>" name="widget-rss[<?php echo $args['number']; ?>][<?php echo $input; ?>]" value="<?php echo $args[ $input ]; ?>" />

<?php

endif;

endforeach;

}

/**

* Process RSS feed widget data and optionally retrieve feed items.

* The feed widget can not have more than 20 items or it will reset back to the

* default, which is 10.

* The resulting array has the feed title, feed url, feed link (from channel),

* feed items, error (if any), and whether to show summary, author, and date.

* All respectively in the order of the array elements.

* @since 2.5.0

* @param array $widget_rss RSS widget feed data. Expects unescaped data.

* @param bool $check_feed Optional, default is true. Whether to check feed for errors.

* @return array

function wp_widget_rss_process( $widget_rss, $check_feed = true ) {

$items = (int) $widget_rss['items'];

if ( $items < 1 || 20 < $items )

$items = 10;

$url = esc_url_raw( strip_tags( $widget_rss['url'] ) );

$title = isset( $widget_rss['title'] ) ? trim( strip_tags( $widget_rss['title'] ) ) : '';

$show_summary = isset( $widget_rss['show_summary'] ) ? (int) $widget_rss['show_summary'] : 0;

$show_author = isset( $widget_rss['show_author'] ) ? (int) $widget_rss['show_author'] :0;

$show_date = isset( $widget_rss['show_date'] ) ? (int) $widget_rss['show_date'] : 0;

if ( $check_feed ) {

$rss = fetch_feed($url);

$error = false;

$link = '';

if ( is_wp_error($rss) ) {

$error = $rss->get_error_message();

} else {

$link = esc_url(strip_tags($rss->get_permalink()));

while ( stristr($link, 'http') != $link )

$link = substr($link, 1);

$rss->__destruct();

unset($rss);

}

return compact( 'title', 'url', 'link', 'items', 'error', 'show_summary', 'show_author', 'show_date' );

}

/**

* Tag cloud widget class

* @since 2.8.0

class WP_Widget_Tag_Cloud extends WP_Widget {

public function __construct() {

$widget_ops = array( 'description' => __( "A cloud of your most used tags.") );

parent::__construct('tag_cloud', __('Tag Cloud'), $widget_ops);

}

public function widget( $args, $instance ) {

$current_taxonomy = $this->_get_current_taxonomy($instance);

if ( !empty($instance['title']) ) {

$title = $instance['title'];

} else {

if ( 'post_tag' == $current_taxonomy ) {

$title = __('Tags');

} else {

$tax = get_taxonomy($current_taxonomy);

$title = $tax->labels->name;

}

/** This filter is documented in wp-includes/default-widgets.php */

$title = apply_filters( 'widget_title', $title, $instance, $this->id_base );

echo $args['before_widget'];

if ( $title ) {

echo $args['before_title'] . $title . $args['after_title'];

}

echo '<div class="tagcloud">';

/**

* Filter the taxonomy used in the Tag Cloud widget.

* @since 2.8.0

* @since 3.0.0 Added taxonomy drop-down.

* @see wp_tag_cloud()

* @param array $current_taxonomy The taxonomy to use in the tag cloud. Default 'tags'.

wp_tag_cloud( apply_filters( 'widget_tag_cloud_args', array(

'taxonomy' => $current_taxonomy

) ) );

echo "</div>\n";

echo $args['after_widget'];

}

public function update( $new_instance, $old_instance ) {

$instance['title'] = strip_tags(stripslashes($new_instance['title']));

$instance['taxonomy'] = stripslashes($new_instance['taxonomy']);

return $instance;

}

public function form( $instance ) {

$current_taxonomy = $this->_get_current_taxonomy($instance);

<p><label for="<?php echo $this->get_field_id('title'); ?>"><?php _e('Title:') ?></label>

<input type="text" class="widefat" id="<?php echo $this->get_field_id('title'); ?>" name="<?php echo $this->get_field_name('title'); ?>" value="<?php if (isset ( $instance['title'])) {echo esc_attr( $instance['title'] );} ?>" /></p>

<p><label for="<?php echo $this->get_field_id('taxonomy'); ?>"><?php _e('Taxonomy:') ?></label>

<select class="widefat" id="<?php echo $this->get_field_id('taxonomy'); ?>" name="<?php echo $this->get_field_name('taxonomy'); ?>">

<?php foreach ( get_taxonomies() as $taxonomy ) :

$tax = get_taxonomy($taxonomy);

if ( !$tax->show_tagcloud || empty($tax->labels->name) )

continue;

<option value="<?php echo esc_attr($taxonomy) ?>" <?php selected($taxonomy, $current_taxonomy) ?>><?php echo $tax->labels->name; ?></option>

<?php endforeach; ?>

</select></p><?php

}

public function _get_current_taxonomy($instance) {

if ( !empty($instance['taxonomy']) && taxonomy_exists($instance['taxonomy']) )

return $instance['taxonomy'];

return 'post_tag';

}

/**

* Navigation Menu widget class

* @since 3.0.0

class WP_Nav_Menu_Widget extends WP_Widget {

public function __construct() {

$widget_ops = array( 'description' => __('Add a custom menu to your sidebar.') );

parent::__construct( 'nav_menu', __('Custom Menu'), $widget_ops );

}

public function widget($args, $instance) {

// Get menu

$nav_menu = ! empty( $instance['nav_menu'] ) ? wp_get_nav_menu_object( $instance['nav_menu'] ) : false;

if ( !$nav_menu )

return;

/** This filter is documented in wp-includes/default-widgets.php */

$instance['title'] = apply_filters( 'widget_title', empty( $instance['title'] ) ? '' : $instance['title'], $instance, $this->id_base );

echo $args['before_widget'];

if ( !empty($instance['title']) )

echo $args['before_title'] . $instance['title'] . $args['after_title'];

wp_nav_menu( array( 'fallback_cb' => '', 'menu' => $nav_menu ) );

echo $args['after_widget'];

}

public function update( $new_instance, $old_instance ) {

$instance = array();

if ( ! empty( $new_instance['title'] ) ) {

$instance['title'] = strip_tags( stripslashes($new_instance['title']) );

}

if ( ! empty( $new_instance['nav_menu'] ) ) {

$instance['nav_menu'] = (int) $new_instance['nav_menu'];

}

return $instance;

}

public function form( $instance ) {

$title = isset( $instance['title'] ) ? $instance['title'] : '';

$nav_menu = isset( $instance['nav_menu'] ) ? $instance['nav_menu'] : '';

// Get menus

$menus = wp_get_nav_menus( array( 'orderby' => 'name' ) );

// If no menus exists, direct the user to go and create some.

if ( !$menus ) {

echo '<p>'. sprintf( __('No menus have been created yet. <a href="%s">Create some</a>.'), admin_url('nav-menus.php') ) .'</p>';

return;

}

<p>

<label for="<?php echo $this->get_field_id('title'); ?>"><?php _e('Title:') ?></label>

<input type="text" class="widefat" id="<?php echo $this->get_field_id('title'); ?>" name="<?php echo $this->get_field_name('title'); ?>" value="<?php echo $title; ?>" />

</p>

<p>

<label for="<?php echo $this->get_field_id('nav_menu'); ?>"><?php _e('Select Menu:'); ?></label>

<select id="<?php echo $this->get_field_id('nav_menu'); ?>" name="<?php echo $this->get_field_name('nav_menu'); ?>">

<?php

foreach ( $menus as $menu ) {

echo '<option value="' . $menu->term_id . '"'

. selected( $nav_menu, $menu->term_id, false )

. '>'. esc_html( $menu->name ) . '</option>';

}

</select>

</p>

<?php

}

/**

* Register all of the default WordPress widgets on startup.

* Calls 'widgets_init' action after all of the WordPress widgets have been

* registered.

* @since 2.2.0

function wp_widgets_init() {

if ( !is_blog_installed() )

return;

register_widget('WP_Widget_Pages');

register_widget('WP_Widget_Calendar');

register_widget('WP_Widget_Archives');

if ( get_option( 'link_manager_enabled' ) )

register_widget('WP_Widget_Links');

register_widget('WP_Widget_Meta');

register_widget('WP_Widget_Search');

register_widget('WP_Widget_Text');

register_widget('WP_Widget_Categories');

register_widget('WP_Widget_Recent_Posts');

register_widget('WP_Widget_Recent_Comments');

register_widget('WP_Widget_RSS');

register_widget('WP_Widget_Tag_Cloud');

register_widget('WP_Nav_Menu_Widget');

/**

* Fires after all default WordPress widgets have been registered.

* @since 2.2.0

do_action( 'widgets_init' );

}

add_action('init', 'wp_widgets_init', 1);

- Wordpress

月	火	水	木	金	土	日
« 4月
						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

WordPressを読む 98-3 /blog/wp-includes/default-widgets.php 3

WordPressを読む　98-3 /blog/wp-includes/default-widgets.php 3