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