From fcee2600f18e453b43de58d592488c20bd54c77d Mon Sep 17 00:00:00 2001
From: devjin <namnyams@gmail.com>
Date: Thu, 18 Oct 2012 07:55:57 +0000
Subject: [PATCH] issue 2596 add a js callback method.

git-svn-id: http://xe-core.googlecode.com/svn/branches/maserati@11774 201d5d3c-b55e-5fd7-737f-ddc643e51545
---
 classes/context/Context.class.php            |  7 +++++--
 classes/display/DisplayHandler.class.php     |  7 ++++++-
 classes/display/JSCallbackDisplayHandler.php | 18 ++++++++++++++++++
 3 files changed, 29 insertions(+), 3 deletions(-)
 create mode 100644 classes/display/JSCallbackDisplayHandler.php

diff --git a/classes/context/Context.class.php b/classes/context/Context.class.php
index 8369beb66..8d7a53b9a 100644
--- a/classes/context/Context.class.php
+++ b/classes/context/Context.class.php
@@ -794,7 +794,7 @@ class Context {
 	function setResponseMethod($method='HTML') {
 		is_a($this,'Context')?$self=&$this:$self=&Context::getInstance();
 
-		$methods = array('HTML'=>1, 'XMLRPC'=>1, 'JSON'=>1);
+		$methods = array('HTML'=>1, 'XMLRPC'=>1, 'JSON'=>1, 'JS_CALLBACK' => 1);
 		$self->response_method = isset($methods[$method]) ? $method : 'HTML';
 	}
 
@@ -809,7 +809,7 @@ class Context {
 		if($self->response_method) return $self->response_method;
 
 		$method  = $self->getRequestMethod();
-		$methods = array('HTML'=>1, 'XMLRPC'=>1, 'JSON'=>1);
+		$methods = array('HTML'=>1, 'XMLRPC'=>1, 'JSON'=>1, 'JS_CALLBACK' => 1);
 
 		return isset($methods[$method]) ? $method : 'HTML';
 	}
@@ -823,9 +823,12 @@ class Context {
 	function setRequestMethod($type='') {
 		is_a($this,'Context')?$self=&$this:$self=&Context::getInstance();
 
+		$xe_js_callback = isset($_GET['xe_js_callback']) ? $_GET['xe_js_callback'] : $_POST['xe_js_callback'];
+
 		($type && $self->request_method=$type) or
 		(strpos($_SERVER['CONTENT_TYPE'],'json') && $self->request_method='JSON') or
 		($GLOBALS['HTTP_RAW_POST_DATA'] && $self->request_method='XMLRPC') or
+		($xe_js_callback && $self->request_method='JS_CALLBACK') or
 		($self->request_method = $_SERVER['REQUEST_METHOD']);
 	}
 
diff --git a/classes/display/DisplayHandler.class.php b/classes/display/DisplayHandler.class.php
index c1145e1d0..ea3c389b4 100644
--- a/classes/display/DisplayHandler.class.php
+++ b/classes/display/DisplayHandler.class.php
@@ -43,6 +43,11 @@
 				require_once("./classes/display/JSONDisplayHandler.php");
 				$handler = new JSONDisplayHandler();
 			}
+			else if(Context::getRequestMethod() == 'JS_CALLBACK')
+			{
+				require_once("./classes/display/JSCallbackDisplayHandler.php");
+				$handler = new JSCallbackDisplayHandler();
+			}
             else {
 				require_once("./classes/display/HTMLDisplayHandler.php");
 				$handler = new HTMLDisplayHandler();
@@ -65,7 +70,7 @@
 			if($httpStatusCode && $httpStatusCode != 200) $this->_printHttpStatusCode($httpStatusCode);
 			else
 			{
-				if(Context::getResponseMethod() == 'JSON') $this->_printJSONHeader();
+				if(Context::getResponseMethod() == 'JSON' || Context::getResponseMethod() == 'JS_CALLBACK') $this->_printJSONHeader();
 				else if(Context::getResponseMethod() != 'HTML') $this->_printXMLHeader();
 				else $this->_printHTMLHeader();
 			}
diff --git a/classes/display/JSCallbackDisplayHandler.php b/classes/display/JSCallbackDisplayHandler.php
new file mode 100644
index 000000000..c07fe2c41
--- /dev/null
+++ b/classes/display/JSCallbackDisplayHandler.php
@@ -0,0 +1,18 @@
+<?php
+
+class JSCallbackDisplayHandler{
+	/**
+	 * Produce JSCallback compliant content given a module object.\n
+	 * @param ModuleObject $oModule the module object
+	 * @return string
+	 **/
+	function toDoc(&$oModule)
+	{
+		$variables = $oModule->getVariables();
+		$variables['error'] = $oModule->getError();
+		$variables['message'] = $oModule->getMessage();
+		$json = str_replace(array("\r\n","\n","\t"),array('\n','\n','\t'),json_encode2($variables));
+		$output = sprintf('<script>%s(%s);</script>', Context::get('xe_js_callback'), $json);
+		return $output;
+	}
+}