118 lines
3.4 KiB
PHP
118 lines
3.4 KiB
PHP
<?php
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/*
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* Name: Handle SVG
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* Author: Shish <webmaster@shishnet.org>
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* Description: Handle SVG files
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*/
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class SVGFileHandler implements Extension {
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var $theme;
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public function get_priority() {return 50;}
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public function receive_event(Event $event) {
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if(is_null($this->theme)) $this->theme = get_theme_object($this);
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if(($event instanceof DataUploadEvent) && $this->supported_ext($event->type) && $this->check_contents($event->tmpname)) {
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$hash = $event->hash;
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$ha = substr($hash, 0, 2);
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if(!move_upload_to_archive($event)) return;
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send_event(new ThumbnailGenerationEvent($event->hash, $event->type));
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$image = $this->create_image_from_data(warehouse_path("images", $hash), $event->metadata);
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if(is_null($image)) {
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throw new UploadException("SVG handler failed to create image object from data");
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}
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$iae = new ImageAdditionEvent($event->user, $image);
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send_event($iae);
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$event->image_id = $iae->image->id;
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}
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if(($event instanceof ThumbnailGenerationEvent) && $this->supported_ext($event->type)) {
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$hash = $event->hash;
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$ha = substr($hash, 0, 2);
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global $config;
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// if($config->get_string("thumb_engine") == "convert") {
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// $w = $config->get_int("thumb_width");
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// $h = $config->get_int("thumb_height");
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// $q = $config->get_int("thumb_quality");
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// $mem = $config->get_int("thumb_max_memory") / 1024 / 1024; // IM takes memory in MB
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//
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// exec("convert images/{$ha}/{$hash}[0] -geometry {$w}x{$h} -quality {$q} jpg:thumbs/{$ha}/{$hash}");
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// }
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// else {
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copy("ext/handle_svg/thumb.jpg", warehouse_path("thumbs", $hash));
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// }
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}
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if(($event instanceof DisplayingImageEvent) && $this->supported_ext($event->image->ext)) {
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global $page;
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$this->theme->display_image($page, $event->image);
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}
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if(($event instanceof PageRequestEvent) && $event->page_matches("get_svg")) {
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global $config, $database, $page;
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$id = int_escape($event->get_arg(0));
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$image = Image::by_id($id);
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$hash = $image->hash;
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$page->set_type("image/svg+xml");
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$page->set_mode("data");
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$page->set_data(file_get_contents(warehouse_path("images", $hash)));
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}
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}
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private function supported_ext($ext) {
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$exts = array("svg");
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return in_array(strtolower($ext), $exts);
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}
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private function create_image_from_data($filename, $metadata) {
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global $config;
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$image = new Image();
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$msp = new MiniSVGParser($filename);
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$image->width = $msp->width;
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$image->height = $msp->height;
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$image->filesize = $metadata['size'];
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$image->hash = $metadata['hash'];
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$image->filename = $metadata['filename'];
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$image->ext = $metadata['extension'];
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$image->tag_array = Tag::explode($metadata['tags']);
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$image->source = $metadata['source'];
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return $image;
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}
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private function check_contents($file) {
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if(!file_exists($file)) return false;
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$msp = new MiniSVGParser($file);
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return $msp->valid;
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}
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}
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class MiniSVGParser {
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var $valid=false, $width=0, $height=0;
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function MiniSVGParser($file) {
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$xml_parser = xml_parser_create();
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xml_set_element_handler($xml_parser, array($this, "startElement"), array($this, "endElement"));
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$this->valid = xml_parse($xml_parser, file_get_contents($file), true);
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xml_parser_free($xml_parser);
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}
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function startElement($parser, $name, $attrs) {
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if($name == "SVG") {
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$this->width = int_escape($attrs["WIDTH"]);
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$this->height = int_escape($attrs["HEIGHT"]);
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}
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}
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function endElement($parser, $name) {
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}
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}
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?>
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