Wärting Innovative Solutions

This is a PHP script to determine if an image is an valid 9 patch PNG image that can be used in an android application

<?php 

$src = dirname(__FILE__).'/btn.9.png'; //change me
if(function_exists('imagecreatefrompng') && function_exists('imagecolorat')) {
	$isvalid = IsValid9PatchImage($src);
	print $src . ' is a ' . ($isvalid ? 'valid':'invalid') . ' 9patch image';
}
else {
	print "Could not check if ".$src." is a valid 9patch image. the php functions imagecreatefrompng and imagecolorat is required";
}

function IsValid9PatchImage($pngRel) {
	$im = imagecreatefrompng($pngRel);
	$height = imagesy($im);
	$width = imagesx($im);

	//Not a valid png image?
	if($height <= 0 || $width <= 0) {
		return false;
	}
	$anyBlack = false;
	for($x = 0; $x < $width; $x++){
		$y = 0;
		$rgba = imagecolorat($im,$x,$y);
		$alpha = ($rgba & 0x7F000000) >> 24;
		$red = ($rgba & 0xFF0000) >> 16;
		$green = ($rgba & 0x00FF00) >> 8;
		$blue = ($rgba & 0x0000FF);

		$isAlpha = false;
		$isBlack = false;
		if($alpha == 0 && $red == 0 && $green == 0 && $blue == 0) {
			$isBlack = true;
			$anyBlack = true;
		}
		else if($alpha == 127) {
			$isAlpha = true;
		}

		//If the top left pixel is not transparent then false
		if($x == 0 && $isAlpha == false) {
			//die('If the top left pixel is not transparent then false. x:' . $x . ' y:' . $y);
			return false;
		}

		//If the top right pixel is not transparent then false
		if($x == $width-1 && $isAlpha == false) {
			//die('If the top right pixel is not transparent then false. x:' . $x . ' y:' . $y);
			return false;
		}

		//If it is not completly transparent or black, then false
		if(!$isAlpha && !$isBlack) {
			//die('If it is not completly transparent or black, then false. x:' . $x . ' y:' . $y);
			return false;
		}
	}
	if($!anyBlack) {
		return false;
	}

	$anyBlack = false;
	for($y = 0; $y < $height; $y++){
		$x = 0;
		$rgba = imagecolorat($im,$x,$y);
		$alpha = ($rgba & 0x7F000000) >> 24;
		$red = ($rgba & 0xFF0000) >> 16;
		$green = ($rgba & 0x00FF00) >> 8;
		$blue = ($rgba & 0x0000FF);

		$isAlpha = false;
		$isBlack = false;
		if($alpha == 0 && $red == 0 && $green == 0 && $blue == 0) {
			$isBlack = true;
			$anyBlack = true;
		}
		else if($alpha == 127) {
			$isAlpha = true;
		}

		//If the top left pixel is not transparent then false
		if($y == 0 && $isAlpha == false) {
			//die('If the top left pixel is not transparent then false. x:' . $x . ' y:' . $y);
			return false;
		}

		//If the top right pixel is not transparent then false
		if($y == $width-1 && $isAlpha == false) {
			//die('If the top right pixel is not transparent then false. x:' . $x . ' y:' . $y);
			return false;
		}

		//If it is not completly transparent or black, then false
		if(!$isAlpha && !$isBlack) {
			//die('If it is not completly transparent or black, then false. x:' . $x . ' y:' . $y);
			return false;
		}
	}
	if($!anyBlack) {
		return false;
	}

	return true;
}

?>

To make Eclipse always use utf-8 even when creating new workspace you can just add a single line in eclipse.ini

-Dfile.encoding=UTF-8

In EPiServers public template they have given me a nice way to redirect the user after a XForm have been submitted by hooking up on the AfterSubmitPostedData event.

        public void XForm_ControlSetup(object sender, EventArgs e)
        {
                var control = (XFormControl)sender;
                control.AfterSubmitPostedData += XForm_AfterSubmitPostedData;
        }

        public void XForm_AfterSubmitPostedData(object sender, SaveFormDataEventArgs e)
        {
            var control = (XFormControl)sender;

            if (control.FormDefinition.PageGuidAfterPost != Guid.Empty)
            {
                var pageMap = PermanentLinkMapStore.Find(control.FormDefinition.PageGuidAfterPost) as PermanentPageLinkMap;
                if (pageMap != null)
                {
                    control.Page.Response.Redirect(pageMap.MappedUrl.ToString());
                    return;
                }
            }
        }

If XForm_AfterSubmitPostedData is never triggered this is probably because the SMTP settings is wrong in web.config(!!?).

IMOHO this is a bug and a very stupid way to handle this error, episerver should throw an exception!

Anyway… go ahead and download smtp4dev which is a great dummy SMTP server for developers. And then change the SMTP settings in web.config to something like this:

    <mailSettings>
      <smtp from="noreply@dummy.com" deliveryMethod="Network">
        <network host="localhost" port="25" userName="" password="" defaultCredentials="false" />
      </smtp>
    </mailSettings>

Voila!

When creating a page in EPiServer the page inherits the parent’s ACL.

To remove a role in the on create page event you need the following:

private static void Instance_CreatedPage(object sender, PageEventArgs e)
{
   if (e.Page != null)
   {
      var kb = e.Page;
      var acl = new PageAccessControlList(kb.PageLink)
         {
            new AccessControlEntry("Everyone", AccessLevel.NoAccess, SecurityEntityType.Role),
            new AccessControlEntry("AnotherRole", AccessLevel.NoAccess, SecurityEntityType.Role),
            new AccessControlEntry("UserName", AccessLevel.NoAccess, SecurityEntityType.User)
         };
      acl.Save();
   }
}