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+<?php
+/**
+ * Laconica, the distributed open-source microblogging tool
+ *
+ * Low-level generator for HTML
+ *
+ * PHP version 5
+ *
+ * LICENCE: This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ * @category Output
+ * @package Laconica
+ * @author Evan Prodromou <evan@controlyourself.ca>
+ * @author Sarven Capadisli <csarven@controlyourself.ca>
+ * @copyright 2008 Control Yourself, Inc.
+ * @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
+ * @link http://laconi.ca/
+ */
+
+if (!defined('LACONICA')) {
+ exit(1);
+}
+
+require_once INSTALLDIR.'/lib/xmloutputter.php';
+
+define('PAGE_TYPE_PREFS',
+ 'text/html,application/xhtml+xml,'.
+ 'application/xml;q=0.3,text/xml;q=0.2');
+
+/**
+ * Low-level generator for HTML
+ *
+ * Abstracts some of the code necessary for HTML generation. Especially
+ * has methods for generating HTML form elements. Note that these have
+ * been created kind of haphazardly, not with an eye to making a general
+ * HTML-creation class.
+ *
+ * @category Output
+ * @package Laconica
+ * @author Evan Prodromou <evan@controlyourself.ca>
+ * @author Sarven Capadisli <csarven@controlyourself.ca>
+ * @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
+ * @link http://laconi.ca/
+ *
+ * @see Action
+ * @see XMLOutputter
+ */
+
+class HTMLOutputter extends XMLOutputter
+{
+ /**
+ * Constructor
+ *
+ * Just wraps the XMLOutputter constructor.
+ *
+ * @param string $output URI to output to, default = stdout
+ * @param boolean $indent Whether to indent output, default true
+ */
+
+ function __construct($output='php://output', $indent=true)
+ {
+ parent::__construct($output, $indent);
+ }
+
+ /**
+ * Start an HTML document
+ *
+ * If $type isn't specified, will attempt to do content negotiation.
+ *
+ * Attempts to do content negotiation for language, also.
+ *
+ * @param string $type MIME type to use; default is to do negotation.
+ *
+ * @todo extract content negotiation code to an HTTP module or class.
+ *
+ * @return void
+ */
+
+ function startHTML($type=null)
+ {
+ if (!$type) {
+ $httpaccept = isset($_SERVER['HTTP_ACCEPT']) ?
+ $_SERVER['HTTP_ACCEPT'] : null;
+
+ // XXX: allow content negotiation for RDF, RSS, or XRDS
+
+ $cp = common_accept_to_prefs($httpaccept);
+ $sp = common_accept_to_prefs(PAGE_TYPE_PREFS);
+
+ $type = common_negotiate_type($cp, $sp);
+
+ if (!$type) {
+ common_user_error(_('This page is not available in a '.
+ 'media type you accept'), 406);
+ exit(0);
+ }
+ }
+
+ header('Content-Type: '.$type);
+
+ $this->extraHeaders();
+
+ $this->startXML('html',
+ '-//W3C//DTD XHTML 1.0 Strict//EN',
+ 'http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd');
+
+ // FIXME: correct language for interface
+
+ $language = common_language();
+
+ $this->elementStart('html', array('xmlns' => 'http://www.w3.org/1999/xhtml',
+ 'xml:lang' => $language,
+ 'lang' => $language));
+ }
+
+ /**
+ * Ends an HTML document
+ *
+ * @return void
+ */
+ function endHTML()
+ {
+ $this->elementEnd('html');
+ $this->endXML();
+ }
+
+ /**
+ * To specify additional HTTP headers for the action
+ *
+ * @return void
+ */
+ function extraHeaders()
+ {
+ // Needs to be overloaded
+ }
+
+ /**
+ * Output an HTML text input element
+ *
+ * Despite the name, it is specifically for outputting a
+ * text input element, not other <input> elements. It outputs
+ * a cluster of elements, including a <label> and an associated
+ * instructions span.
+ *
+ * @param string $id element ID, must be unique on page
+ * @param string $label text of label for the element
+ * @param string $value value of the element, default null
+ * @param string $instructions instructions for valid input
+ *
+ * @todo add a $name parameter
+ * @todo add a $maxLength parameter
+ * @todo add a $size parameter
+ *
+ * @return void
+ */
+
+ function input($id, $label, $value=null, $instructions=null)
+ {
+ $this->element('label', array('for' => $id), $label);
+ $attrs = array('name' => $id,
+ 'type' => 'text',
+ 'id' => $id);
+ if ($value) {
+ $attrs['value'] = htmlspecialchars($value);
+ }
+ $this->element('input', $attrs);
+ if ($instructions) {
+ $this->element('p', 'form_guide', $instructions);
+ }
+ }
+
+ /**
+ * output an HTML checkbox and associated elements
+ *
+ * Note that the value is default 'true' (the string), which can
+ * be used by Action::boolean()
+ *
+ * @param string $id element ID, must be unique on page
+ * @param string $label text of label for the element
+ * @param string $checked if the box is checked, default false
+ * @param string $instructions instructions for valid input
+ * @param string $value value of the checkbox, default 'true'
+ * @param string $disabled show the checkbox disabled, default false
+ *
+ * @return void
+ *
+ * @todo add a $name parameter
+ */
+
+ function checkbox($id, $label, $checked=false, $instructions=null,
+ $value='true', $disabled=false)
+ {
+ $attrs = array('name' => $id,
+ 'type' => 'checkbox',
+ 'class' => 'checkbox',
+ 'id' => $id);
+ if ($value) {
+ $attrs['value'] = htmlspecialchars($value);
+ }
+ if ($checked) {
+ $attrs['checked'] = 'checked';
+ }
+ if ($disabled) {
+ $attrs['disabled'] = 'true';
+ }
+ $this->element('input', $attrs);
+ $this->text(' ');
+ $this->element('label', array('class' => 'checkbox',
+ 'for' => $id),
+ $label);
+ $this->text(' ');
+ if ($instructions) {
+ $this->element('p', 'form_guide', $instructions);
+ }
+ }
+
+ /**
+ * output an HTML combobox/select and associated elements
+ *
+ * $content is an array of key-value pairs for the dropdown, where
+ * the key is the option value attribute and the value is the option
+ * text. (Careful on the overuse of 'value' here.)
+ *
+ * @param string $id element ID, must be unique on page
+ * @param string $label text of label for the element
+ * @param array $content options array, value => text
+ * @param string $instructions instructions for valid input
+ * @param string $blank_select whether to have a blank entry, default false
+ * @param string $selected selected value, default null
+ *
+ * @return void
+ *
+ * @todo add a $name parameter
+ */
+
+ function dropdown($id, $label, $content, $instructions=null,
+ $blank_select=false, $selected=null)
+ {
+ $this->element('label', array('for' => $id), $label);
+ $this->elementStart('select', array('id' => $id, 'name' => $id));
+ if ($blank_select) {
+ $this->element('option', array('value' => ''));
+ }
+ foreach ($content as $value => $option) {
+ if ($value == $selected) {
+ $this->element('option', array('value' => $value,
+ 'selected' => $value),
+ $option);
+ } else {
+ $this->element('option', array('value' => $value), $option);
+ }
+ }
+ $this->elementEnd('select');
+ if ($instructions) {
+ $this->element('p', 'form_guide', $instructions);
+ }
+ }
+
+ /**
+ * output an HTML hidden element
+ *
+ * $id is re-used as name
+ *
+ * @param string $id element ID, must be unique on page
+ * @param string $value hidden element value, default null
+ * @param string $name name, if different than ID
+ *
+ * @return void
+ */
+
+ function hidden($id, $value, $name=null)
+ {
+ $this->element('input', array('name' => ($name) ? $name : $id,
+ 'type' => 'hidden',
+ 'id' => $id,
+ 'value' => $value));
+ }
+
+ /**
+ * output an HTML password input and associated elements
+ *
+ * @param string $id element ID, must be unique on page
+ * @param string $label text of label for the element
+ * @param string $instructions instructions for valid input
+ *
+ * @return void
+ *
+ * @todo add a $name parameter
+ */
+
+ function password($id, $label, $instructions=null)
+ {
+ $this->element('label', array('for' => $id), $label);
+ $attrs = array('name' => $id,
+ 'type' => 'password',
+ 'class' => 'password',
+ 'id' => $id);
+ $this->element('input', $attrs);
+ if ($instructions) {
+ $this->element('p', 'form_guide', $instructions);
+ }
+ }
+
+ /**
+ * output an HTML submit input and associated elements
+ *
+ * @param string $id element ID, must be unique on page
+ * @param string $label text of the button
+ * @param string $cls class of the button, default 'submit'
+ * @param string $name name, if different than ID
+ *
+ * @return void
+ *
+ * @todo add a $name parameter
+ */
+
+ function submit($id, $label, $cls='submit', $name=null, $title=null)
+ {
+ $this->element('input', array('type' => 'submit',
+ 'id' => $id,
+ 'name' => ($name) ? $name : $id,
+ 'class' => $cls,
+ 'value' => $label,
+ 'title' => $title));
+ }
+
+ /**
+ * output an HTML textarea and associated elements
+ *
+ * @param string $id element ID, must be unique on page
+ * @param string $label text of label for the element
+ * @param string $content content of the textarea, default none
+ * @param string $instructions instructions for valid input
+ *
+ * @return void
+ *
+ * @todo add a $name parameter
+ * @todo add a $cols parameter
+ * @todo add a $rows parameter
+ */
+
+ function textarea($id, $label, $content=null, $instructions=null)
+ {
+ $this->element('label', array('for' => $id), $label);
+ $this->element('textarea', array('rows' => 3,
+ 'cols' => 40,
+ 'name' => $id,
+ 'id' => $id),
+ ($content) ? $content : '');
+ if ($instructions) {
+ $this->element('p', 'form_guide', $instructions);
+ }
+ }
+}
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-12-19 00:14:15 +0000