changed embedSVG to inlineSVG and make it return contents

This makes it more flexible to use on the expense of needing one echo
more.

_test/tests/inc/common_inlineSVG.test.php

@@ -14,10 +14,7 @@ class common_embedSVG_test extends DokuWikiTest {
             '6.41-3.205 25.59 12.795zM57.59 40.795l6.41 3.205-32 16-32-16 6.41-3.205 25.59 12.795z" '.
             'fill="#000000"></path></svg>';
 
-        ob_start();
-        $this->assertTrue(embedSVG($file));
-        $svg = ob_get_clean();
-        $this->assertEquals($clean, $svg);
+        $this->assertEquals($clean, inlinSVG($file));
     }
 
     /**
@@ -25,10 +22,7 @@ class common_embedSVG_test extends DokuWikiTest {
      */
     function test_fail() {
         $file = mediaFN('wiki:test.svg');
-        ob_start();
-        $this->assertFalse(embedSVG($file, 100));
-        $svg = ob_get_clean();
-        $this->assertEquals('', $svg);
+        $this->assertFalse(inlinSVG($file, 100));
     }
 
 }

inc/Ui/Admin.php

@@ -119,7 +119,7 @@ class Admin extends Ui {
         echo '<li><div class="li">';
         echo '<a href="' . wl($ID, 'do=admin&amp;page=' . $item['plugin']) . '">';
         echo '<span class="icon">';
-        embedSVG($item['icon']);
+        echo inlinSVG($item['icon']);
         echo '</span>';
         echo '<span class="prompt">';
         echo $item['prompt'];

inc/common.php

@@ -2014,17 +2014,19 @@ function stripsourcemaps(&$text){
 }
 
 /**
- * Embeds the contents of a given SVG file in the current context
+ * Returns the contents of a given SVG file for embedding
  *
  * Inlining SVGs saves on HTTP requests and more importantly allows for styling them through
  * CSS. However it should used with small SVGs only. The $maxsize setting ensures only small
  * files are embedded.
  *
+ * This strips unneeded headers, comments and newline. The result is not a vaild standalone SVG!
+ *
  * @param string $file full path to the SVG file
  * @param int $maxsize maximum allowed size for the SVG to be embedded
- * @return bool true if the file was embedded, false otherwise
+ * @return string|false the SVG content, false if the file couldn't be loaded
  */
-function embedSVG($file, $maxsize = 2048) {
+function inlinSVG($file, $maxsize = 2048) {
     $file = trim($file);
     if($file === '') return false;
     if(!file_exists($file)) return false;
@@ -2037,8 +2039,7 @@ function embedSVG($file, $maxsize = 2048) {
     $content = preg_replace('/>\s+</s', '><', $content); // newlines between tags
     $content = trim($content);
     if(substr($content, 0, 5) !== '<svg ') return false;
-    echo $content;
-    return true;
+    return $content;
 }
 
 //Setup VIM: ex: et ts=2 :