Create single-page HTML output, prepares the terrain for PDF/ePub output

libs/Format/Base/EmbedImages.php

@@ -0,0 +1,82 @@
+<?php
+/**
+ * Created by IntelliJ IDEA.
+ * User: onigoetz
+ * Date: 06/11/15
+ * Time: 20:27
+ */
+
+namespace Todaymade\Daux\Format\Base;
+
+use DOMDocument;
+use Todaymade\Daux\DauxHelper;
+use Todaymade\Daux\Tree\Content;
+use Todaymade\Daux\Tree\Root;
+
+class EmbedImages
+{
+
+    protected $tree;
+
+    public function __construct(Root $tree)
+    {
+        $this->tree = $tree;
+    }
+
+    public function embed($page, Content $file, $callback)
+    {
+        return preg_replace_callback(
+            "/<img\\s+[^>]*src=['\"]([^\"]*)['\"][^>]*>/",
+            function ($matches) use ($file, $callback) {
+
+                if ($result = $this->findImage($matches[1], $matches[0], $file, $callback)) {
+                    return $result;
+                }
+
+                return $matches[0];
+            },
+            $page
+        );
+    }
+
+    private function getAttributes($tag)
+    {
+        $dom = new DOMDocument();
+        $dom->loadHTML($tag);
+
+        $img = $dom->getElementsByTagName('img')->item(0);
+
+        $attributes = ['align', 'class', 'title', 'style', 'alt', 'height', 'width'];
+        $used = [];
+        foreach ($attributes as $attr) {
+            if ($img->attributes->getNamedItem($attr)) {
+                $used[$attr] = $img->attributes->getNamedItem($attr)->value;
+            }
+        }
+
+        return $used;
+    }
+
+    private function findImage($src, $tag, Content $file, $callback)
+    {
+        //for protocol relative or http requests : keep the original one
+        if (substr($src, 0, strlen("http")) === "http" || substr($src, 0, strlen("//")) === "//") {
+            return $src;
+        }
+
+        //Get the path to the file, relative to the root of the documentation
+        $url = DauxHelper::getCleanPath(dirname($file->getUrl()) . '/' . $src);
+
+        //Get any file corresponding to the right one
+        $file = DauxHelper::getFile($this->tree, $url);
+
+
+        if ($file === false) {
+            return false;
+        }
+
+        $result = $callback($src, $this->getAttributes($tag), $file);
+
+        return $result ?: $src;
+    }
+}