289 lines
7.7 KiB
PHP
289 lines
7.7 KiB
PHP
<?php
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/**
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* \page themes Themes
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*
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* Each extension has a theme with a specific name -- eg. the extension Setup
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* which is stored in ext/setup/main.php will have a theme called SetupTheme
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* stored in ext/setup/theme.php. If you want to customise it, create a class
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* in the file themes/mytheme/setup.theme.php called CustomSetupTheme which
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* extends SetupTheme and overrides some of its methods.
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*
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* Generally an extension should only deal with processing data; whenever it
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* wants to display something, it should pass the data to be displayed to the
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* theme object, and the theme will add the data into the global $page
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* structure.
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*
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* A page should make sure that all the data it outputs is free from dangerous
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* data by using html_escape(), url_escape(), or int_escape() as appropriate.
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*
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* Because some HTML can be placed anywhere according to the theme, coming up
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* with the correct way to link to a page can be hard -- thus we have the
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* make_link() function, which will take a path like "post/list" and turn it
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* into a full and correct link, eg /myboard/post/list, /foo/index.php?q=post/list,
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* etc depending on how things are set up. This should always be used to link
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* to pages rather than hardcoding a path.
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*
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* Various other common functions are available as part of the Themelet class.
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*/
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/**
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* A data structure for holding all the bits of data that make up a page.
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*
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* The various extensions all add whatever they want to this structure,
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* then Layout turns it into HTML
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*/
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class Page {
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/** @name Overall */
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//@{
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/** @private */
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var $mode = "page";
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/** @private */
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var $type = "text/html; charset=utf-8";
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/**
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* Set what this page should do; "page", "data", or "redirect".
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*/
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public function set_mode($mode) {
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$this->mode = $mode;
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}
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/**
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* Set the page's MIME type
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*/
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public function set_type($type) {
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$this->type = $type;
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}
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//@}
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// ==============================================
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/** @name "data" mode */
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//@{
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/** @private */
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var $data = "";
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/** @private */
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var $filename = null;
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/**
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* Set the raw data to be sent
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*/
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public function set_data($data) {
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$this->data = $data;
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}
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/**
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* Set the recommended download filename
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*/
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public function set_filename($filename) {
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$this->filename = $filename;
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}
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//@}
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// ==============================================
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/** @name "redirect" mode */
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//@{
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/** @private */
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var $redirect = "";
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/**
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* Set the URL to redirect to (remember to use make_link() if linking
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* to a page in the same site)
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*/
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public function set_redirect($redirect) {
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$this->redirect = $redirect;
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}
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//@}
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// ==============================================
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/** @name "page" mode */
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//@{
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/** @privatesection */
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var $title = "";
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var $heading = "";
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var $subheading = "";
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var $quicknav = "";
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var $html_headers = array();
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var $http_headers = array();
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var $blocks = array();
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/** @publicsection */
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/**
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* Set the window title
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*/
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public function set_title($title) {
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$this->title = $title;
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}
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/**
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* Set the main heading
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*/
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public function set_heading($heading) {
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$this->heading = $heading;
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}
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/**
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* Set the sub heading
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*/
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public function set_subheading($subheading) {
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$this->subheading = $subheading;
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}
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/**
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* Add a line to the HTML head section
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*/
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public function add_html_header($line, $position=50) {
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while(isset($this->html_headers[$position])) $position++;
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$this->html_headers[$position] = $line;
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}
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/**
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* Add a http header to be sent to the client.
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*/
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public function add_http_header($line, $position=50) {
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while(isset($this->http_headers[$position])) $position++;
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$this->http_headers[$position] = $line;
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}
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/**
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* Get all the HTML headers that are currently set and return as a string.
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*/
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public function get_all_html_headers() {
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$data = '';
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foreach ($this->html_headers as $line) {
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$data .= $line . "\n";
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}
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return $data;
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}
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/**
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* Removes all currently set HTML headers. (Be careful..)
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*/
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public function delete_all_html_headers() {
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$this->html_headers = array();
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}
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/**
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* Add a Block of data
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*/
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public function add_block(Block $block) {
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$this->blocks[] = $block;
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}
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//@}
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// ==============================================
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/**
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* Display the page according to the mode and data given
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*/
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public function display() {
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global $page, $user;
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header("Content-type: ".$this->type);
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header("X-Powered-By: SCore-".SCORE_VERSION);
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if (!headers_sent()) {
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foreach($this->http_headers as $head){ header($head); }
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} else {
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print "Error: Headers have already been sent to the client.";
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}
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switch($this->mode) {
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case "page":
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if(CACHE_HTTP) {
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header("Vary: Cookie, Accept-Encoding");
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if($user->is_anonymous() && $_SERVER["REQUEST_METHOD"] == "GET") {
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header("Cache-control: public, max-age=600");
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header('Expires: ' . gmdate('D, d M Y H:i:s', time() + 600) . ' GMT');
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}
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else {
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#header("Cache-control: private, max-age=0");
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header("Cache-control: no-cache");
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header('Expires: ' . gmdate('D, d M Y H:i:s', time() - 600) . ' GMT');
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}
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}
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#else {
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# header("Cache-control: no-cache");
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# header('Expires: ' . gmdate('D, d M Y H:i:s', time() - 600) . ' GMT');
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#}
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usort($this->blocks, "blockcmp");
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$this->add_auto_html_headers();
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$layout = new Layout();
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$layout->display_page($page);
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break;
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case "data":
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header("Content-Length: ".strlen($this->data));
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if(!is_null($this->filename)) {
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header('Content-Disposition: attachment; filename='.$this->filename);
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}
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print $this->data;
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break;
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case "redirect":
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header('Location: '.$this->redirect);
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print 'You should be redirected to <a href="'.$this->redirect.'">'.$this->redirect.'</a>';
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break;
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default:
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print "Invalid page mode";
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break;
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}
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}
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protected function add_auto_html_headers() {
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global $config;
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$data_href = get_base_href();
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$theme_name = $config->get_string('theme', 'default');
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$this->add_html_header("<script type='text/javascript'>base_href = '$data_href';</script>");
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# 404/static handler will map these to themes/foo/bar.ico or lib/static/bar.ico
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$this->add_html_header("<link rel='icon' type='image/x-icon' href='$data_href/favicon.ico'>");
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$this->add_html_header("<link rel='apple-touch-icon' href='$data_href/apple-touch-icon.png'>");
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$css_files = array();
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$css_latest = 0;
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foreach(array_merge(zglob("lib/*.css"), zglob("ext/*/style.css"), zglob("themes/$theme_name/style.css")) as $css) {
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$css_files[] = $css;
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$css_latest = max($css_latest, filemtime($css));
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}
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$css_cache_file = data_path("cache/style.$css_latest.css");
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if(!file_exists($css_cache_file)) {
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$css_data = "";
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foreach($css_files as $file) {
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$file_data = file_get_contents($file);
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$pattern = '/url[\s]*\([\s]*["\']?([^"\'\)]+)["\']?[\s]*\)/';
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$replace = 'url("../../'.dirname($file).'/$1")';
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$file_data = preg_replace($pattern, $replace, $file_data);
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$css_data .= $file_data . "\n";
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}
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file_put_contents($css_cache_file, $css_data);
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}
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$this->add_html_header("<link rel='stylesheet' href='$data_href/$css_cache_file' type='text/css'>");
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$js_files = array();
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$js_latest = 0;
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foreach(array_merge(zglob("lib/*.js"), zglob("ext/*/script.js"), zglob("themes/$theme_name/script.js")) as $js) {
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$js_files[] = $js;
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$js_latest = max($js_latest, filemtime($js));
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}
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$js_cache_file = data_path("cache/script.$js_latest.js");
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if(!file_exists($js_cache_file)) {
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$js_data = "";
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foreach($js_files as $file) {
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$js_data .= file_get_contents($file) . "\n";
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}
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file_put_contents($js_cache_file, $js_data);
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}
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$this->add_html_header("<script src='$data_href/$js_cache_file' type='text/javascript'></script>");
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}
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}
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class MockPage extends Page {
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}
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?>
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