Collaboration diagram for ilPreviewGUI:

Public Member Functions
	__construct ($a_node_id=null, $a_context=self::CONTEXT_REPOSITORY, $a_obj_id=null, $a_access_handler=null)
	Creates a new preview GUI.
&	executeCommand ()
	execute command
	getJSCall ($a_html_id)
	Gets the JavaScript code to show the preview.
	getPreviewHTML ()
	Gets the HTML that displays the preview.
	getInlineHTML ()
	Gets the HTML that is used for displaying the preview inline.
	renderPreview ()
	Renders the preview and returns the HTML code that displays the preview.
	deletePreview ()
	Deletes the preview and returns the HTML code that displays the preview.

Data Fields
const	CONTEXT_REPOSITORY = 1
const	CONTEXT_WORKSPACE = 2

Private Member Functions
	renderCommand ($tmpl, $a_cmd, $btn_topic, $loading_topic, $a_display_status)
	Renders a command to the specified template.
	getHtmlId ()
	Gets the HTML id for the preview.
	buildUrl ($a_cmd="", $a_async=true)
	Builds the URL to call the preview GUI.

Static Private Member Functions
static	initPreview ()
	Initializes the preview and loads the needed javascripts and styles.
static	jsonSafeString ($text)
	Makes the specified string safe for JSON.

Private Attributes
	$node_id = null
	$obj_id = null
	$preview = null
	$access_handler = null
	$context = null
	$ctrl = null
	$lng = null

Static Private Attributes
static	$initialized = false

Detailed Description

Definition at line 15 of file class.ilPreviewGUI.php.

Constructor & Destructor Documentation

ilPreviewGUI::__construct	(	$a_node_id = `null`,
		$a_context = `self::CONTEXT_REPOSITORY`,
		$a_obj_id = `null`,
		$a_access_handler = `null`
	)

Creates a new preview GUI.

Parameters

int	$a_node_id	The node id.
int	$a_context	The context of the preview.
int	$a_obj_id	The object id.
object	$a_access_handler	The access handler to use.

Definition at line 37 of file class.ilPreviewGUI.php.

References $_GET, $ilCtrl, $lng, ilObject\_lookupObjId(), and initPreview().

        {
                global $ilCtrl, $lng, $ilAccess;
                
                // if we are the base class, get the id's from the query string
                if (strtolower($_GET["baseClass"]) == "ilpreviewgui")
                {
                        $this->node_id = (int)$_GET["node_id"];
                        $this->context = (int)$_GET["context"];
            $a_obj_id = (int)$_GET['obj_id'];
                }
                else
                {
                        $this->node_id = $a_node_id;
                        $this->context = $a_context;
                }
                
                // assign values
                $this->ctrl =& $ilCtrl;
                $this->lng =& $lng;
                
                // access handler NOT provided?
                if ($a_access_handler == null)
                {
                        if ($this->context == self::CONTEXT_WORKSPACE)
                        {
                                include_once("./Services/PersonalWorkspace/classes/class.ilWorkspaceAccessHandler.php");
                                $a_access_handler = new ilWorkspaceAccessHandler();
                        }
                        else
                        {
                                $a_access_handler = $ilAccess;
                        }
                }
                $this->access_handler = $a_access_handler;
                
                // object id NOT provided?
                if ($a_obj_id == null)
                {
                        if ($this->context == self::CONTEXT_WORKSPACE)
                                $a_obj_id = $this->access_handler->getTree()->lookupObjectId($this->node_id);
                        else
                                $a_obj_id = ilObject::_lookupObjId($this->node_id);
                }
                $this->obj_id = $a_obj_id;
                
                // create preview object
                $this->preview = new ilPreview($this->obj_id);
                
                // if the call is NOT async initialize our stuff
                if (!$ilCtrl->isAsynch())
                        ilPreviewGUI::initPreview();
        }

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Member Function Documentation

ilPreviewGUI::buildUrl	(	$a_cmd = `""`,
		$a_async = `true`
	)

private

Builds the URL to call the preview GUI.

Parameters

$a_cmd	string The command to call.
$a_async	bool true, to create a URL to call asynchronous; otherwise, false.

Returns: string The created URL.

Definition at line 314 of file class.ilPreviewGUI.php.

Referenced by getJSCall(), and renderCommand().

        {
                $link = "ilias.php?baseClass=ilPreviewGUI&node_id={$this->node_id}&context={$this->context}&obj_id={$this->obj_id}";
                
                if ($a_async)
                        $link .= "&cmdMode=asynch";
                
                if (!empty($a_cmd))
                        $link .= "&cmd=$a_cmd";
                
                return $link;
        }

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ilPreviewGUI::deletePreview ( )

Deletes the preview and returns the HTML code that displays the preview.

Returns: string The HTML code that displays the preview.

Definition at line 286 of file class.ilPreviewGUI.php.

References getPreviewHTML().

        {
                // has read access?
                if ($this->access_handler->checkAccess("write", "", $this->node_id))
                {
                        // get the preview
                        require_once("./Services/Preview/classes/class.ilPreview.php");
                        $this->preview->delete();
                }
                return $this->getPreviewHTML();
        }

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& ilPreviewGUI::executeCommand ( )

execute command

Definition at line 94 of file class.ilPreviewGUI.php.

References $cmd.

        {
                $cmd = $this->ctrl->getCmd("getPreviewHTML");
                $next_class = $this->ctrl->getNextClass($this);
                switch($next_class)
                {
                        default:
                                return $this->$cmd();
                                break;
                }
        }       

ilPreviewGUI::getHtmlId ( )

private

Gets the HTML id for the preview.

Returns: string The HTML id to use for the preview.

Definition at line 303 of file class.ilPreviewGUI.php.

References $node_id.

Referenced by getPreviewHTML(), and renderCommand().

        {
                return "preview_" . $this->node_id;     
        }

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ilPreviewGUI::getInlineHTML ( )

Gets the HTML that is used for displaying the preview inline.

Returns: string The HTML that is used for displaying the preview inline.

Definition at line 206 of file class.ilPreviewGUI.php.

References getPreviewHTML(), ilPreview\RENDER_STATUS_CREATED, ilPreview\RENDER_STATUS_FAILED, ilPreview\RENDER_STATUS_NONE, and renderCommand().

    {
                $tmpl = new ilTemplate("tpl.preview_inline.html", true, true, "Services/Preview");
        $tmpl->setVariable("PREVIEW", $this->getPreviewHTML());
                
                // rendering allowed?
                if ($this->access_handler->checkAccess("read", "", $this->node_id))
                {
                        $this->renderCommand(
                                $tmpl, 
                                "render", 
                                "preview_create", 
                                "preview_status_creating",
                                array(ilPreview::RENDER_STATUS_NONE, ilPreview::RENDER_STATUS_FAILED));
                }
                        
                // delete allowed?
                if ($this->access_handler->checkAccess("write", "", $this->node_id))
                {
                        $this->renderCommand(
                                $tmpl, 
                                "delete", 
                                "preview_delete", 
                                "preview_status_deleting",
                                array(ilPreview::RENDER_STATUS_CREATED));
                }
                
        return $tmpl->get();
    }

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ilPreviewGUI::getJSCall ( $a_html_id )

Gets the JavaScript code to show the preview.

Parameters

$a_html_id string The id of the HTML element that contains the preview.

Returns: string The JavaScript code to show the preview.

Definition at line 112 of file class.ilPreviewGUI.php.

References buildUrl(), jsonSafeString(), and ilPreview\RENDER_STATUS_NONE.

        {
                $status = $this->preview->getRenderStatus();
                $command = $status == ilPreview::RENDER_STATUS_NONE ? "renderPreview" : "";
                $loading_text = self::jsonSafeString($this->lng->txt($status == ilPreview::RENDER_STATUS_NONE ? "preview_status_creating" : "preview_loading"));
                
                // build the url
                $link = $this->buildUrl($command);
                return "il.Preview.toggle(event, { id: '{$this->node_id}', htmlId: '{$a_html_id}', url: '$link', status: '$status', loadingText: '$loading_text' });";  
        }

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ilPreviewGUI::getPreviewHTML ( )

Gets the HTML that displays the preview.

Returns: string The HTML that displays the preview.

Definition at line 127 of file class.ilPreviewGUI.php.

References ilJsonUtil\encode(), exit, getHtmlId(), ilPreview\RENDER_STATUS_FAILED, and ilPreview\RENDER_STATUS_PENDING.

Referenced by deletePreview(), getInlineHTML(), and renderPreview().

        {
                // load the template
                $tmpl = new ilTemplate("tpl.preview.html", true, true, "Services/Preview");
                $tmpl->setVariable("PREVIEW_ID", $this->getHtmlId());
                
                // check for read access and get object id
                $preview_status = $this->preview->getRenderStatus();
                
                // has read access?
                if ($this->access_handler->checkAccess("read", "", $this->node_id))
                {
                        // preview images available?
                        $images = $this->preview->getImages();
                        if (count($images) > 0)
                        {
                                foreach ($images as $image)
                                {
                                        $tmpl->setCurrentBlock("preview_item");
                                        $tmpl->setVariable("IMG_URL", $image["url"]);
                                        $tmpl->setVariable("WIDTH", $image["width"]);
                                        $tmpl->setVariable("HEIGHT", $image["height"]);
                                        $tmpl->parseCurrentBlock();
                                }
                        }
                        else
                        {
                                // set text depending on the status
                                $tmpl->setCurrentBlock("no_preview");
                                switch ($preview_status)
                                {
                                        case ilPreview::RENDER_STATUS_PENDING:
                                                $tmpl->setVariable("TXT_NO_PREVIEW", $this->lng->txt("preview_status_pending"));
                                                break;
                                        
                                        case ilPreview::RENDER_STATUS_FAILED:
                                                $tmpl->setVariable("TXT_NO_PREVIEW", $this->lng->txt("preview_status_failed"));
                                                break;
                                        
                                        default:
                                                $tmpl->setVariable("TXT_NO_PREVIEW", $this->lng->txt("preview_status_missing"));
                                                break;                          
                                }
                                $tmpl->parseCurrentBlock();
                        }
                }
                else
                {
                        // display error message
                        $tmpl->setVariable("TXT_NO_PREVIEW", $this->lng->txt("no_access_item"));
                }
                
                // output
                if ($this->ctrl->isAsynch())
                {
                        include_once("./Services/JSON/classes/class.ilJsonUtil.php");
                        
                        $response = new stdClass();     
                        $response->html = $tmpl->get();
                        $response->status = $preview_status;
                        
                        // send response object (don't use 'application/json' as IE wants to download it!)
                        header('Vary: Accept');
                        header('Content-type: text/plain');
                        echo ilJsonUtil::encode($response);
                        // no further processing!
                        exit;
                }
                else
                {
                        return $tmpl->get();
                }
        }

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static ilPreviewGUI::initPreview ( )

staticprivate

Initializes the preview and loads the needed javascripts and styles.

Definition at line 330 of file class.ilPreviewGUI.php.

References $ilCtrl, $lng, $tpl, ilJsonUtil\encode(), ilPreviewSettings\getImageSize(), ilUtil\getStyleSheetLocation(), iljQueryUtil\initjQuery(), ilTooltipGUI\initLibrary(), and ilUtil\prepareFormOutput().

Referenced by __construct().

        {
                if (self::$initialized)
                        return;
                
                global $tpl, $lng, $ilCtrl;
                
                
                // jquery
                include_once("./Services/jQuery/classes/class.iljQueryUtil.php");
                iljQueryUtil::initjQuery();
                
                // load qtip
                include_once("./Services/UIComponent/Tooltip/classes/class.ilTooltipGUI.php");
                ilTooltipGUI::initLibrary();
                
                // needed scripts & styles
                $tpl->addJavaScript("./Services/Preview/js/jquery.mousewheel.js");
                $tpl->addJavaScript("./Services/Preview/js/ilPreview.js");
                $tpl->addCss(ilUtil::getStyleSheetLocation("filesystem", "preview.css", "Services/Preview"));
                
                // create loading template
                $tmpl = new ilTemplate("tpl.preview.html", true, true, "Services/Preview");
                $tmpl->setCurrentBlock("no_preview");
                $tmpl->setVariable("TXT_NO_PREVIEW", "%%0%%");
                $tmpl->parseCurrentBlock();
                
                $initialHtml = str_replace(array("\r\n", "\r"), "\n", $tmpl->get());
                $lines = explode("\n", $initialHtml);
                $new_lines = array();
                foreach ($lines as $i => $line) 
                {
                        if(!empty($line))
                                $new_lines[] = trim($line);
                }
                $initialHtml = implode($new_lines);             
                
                // add default texts and values
                include_once("./Services/JSON/classes/class.ilJsonUtil.php");
                $tpl->addOnLoadCode("il.Preview.texts.preview = \"" . self::jsonSafeString($lng->txt("preview")) . "\";");
                $tpl->addOnLoadCode("il.Preview.texts.showPreview = \"" . self::jsonSafeString($lng->txt("preview_show")) . "\";");
                $tpl->addOnLoadCode("il.Preview.texts.close = \"" . ilUtil::prepareFormOutput($lng->txt("close")) . "\";");
                $tpl->addOnLoadCode("il.Preview.previewSize = " . ilPreviewSettings::getImageSize() . ";");
                $tpl->addOnLoadCode("il.Preview.initialHtml = " . ilJsonUtil::encode($initialHtml) . ";");
                $tpl->addOnLoadCode("il.Preview.highlightClass = \"ilContainerListItemOuterHighlight\";");
                $tpl->addOnLoadCode("il.Preview.init();");
                
                self::$initialized = true;
        }

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static ilPreviewGUI::jsonSafeString ( $text )

staticprivate

Makes the specified string safe for JSON.

Parameters

string $text The text to make JSON safe.

Returns: The JSON safe text.

Definition at line 386 of file class.ilPreviewGUI.php.

Referenced by getJSCall(), and renderCommand().

        {
                if (!is_string($text))
                        return $text;
                
                $text = htmlentities($text, ENT_COMPAT | ENT_HTML401, "UTF-8");
                $text = str_replace("'", "&#039;", $text);
                return $text;
        }

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ilPreviewGUI::renderCommand	(	$tmpl,
		$a_cmd,
		$btn_topic,
		$loading_topic,
		$a_display_status
	)

private

Renders a command to the specified template.

Parameters

$tmpl	object The template.
$a_cmd	string The command to create.
$btn_topic	string The topic to get the button text.
$loading_topic	string The topic to get the loading text.
$a_display_status	array An array containing the statuses when the command should be visible.

Definition at line 244 of file class.ilPreviewGUI.php.

References buildUrl(), getHtmlId(), and jsonSafeString().

Referenced by getInlineHTML().

        {
                $preview_html_id = $this->getHtmlId();
                $preview_status = $this->preview->getRenderStatus();
                $loading_text = self::jsonSafeString($this->lng->txt($loading_topic));
                
                $link = $this->buildUrl($a_cmd . "Preview");
                $script_args = "event, { id: '{$this->node_id}', htmlId: '$preview_html_id', url: '$link', loadingText: '$loading_text' }";
                
                $action_class = "";
                if (!is_array($a_display_status) || !in_array($preview_status, $a_display_status))
                        $action_class = "ilPreviewActionHidden";
                
                $tmpl->setCurrentBlock("preview_action");
                $tmpl->setVariable("CLICK_ACTION", "il.Preview.$a_cmd($script_args);");
                $tmpl->setVariable("ACTION_CLASS", "$action_class");
                $tmpl->setVariable("ACTION_ID", "preview_{$a_cmd}_" . $this->node_id);
                $tmpl->setVariable("TXT_ACTION", $this->lng->txt($btn_topic));
                $tmpl->parseCurrentBlock();
        }

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ilPreviewGUI::renderPreview ( )

Renders the preview and returns the HTML code that displays the preview.

Returns: string The HTML code that displays the preview.

Definition at line 269 of file class.ilPreviewGUI.php.

References ilObjectFactory\getInstanceByObjId(), and getPreviewHTML().

        {
                // has read access?
                if ($this->access_handler->checkAccess("read", "", $this->node_id))
                {
                        // get the object
                        $obj = ilObjectFactory::getInstanceByObjId($this->obj_id);
                        $this->preview->create($obj);
                }
                return $this->getPreviewHTML();
        }

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Field Documentation

ilPreviewGUI::$access_handler = null

private

Definition at line 20 of file class.ilPreviewGUI.php.

ilPreviewGUI::$context = null

private

Definition at line 21 of file class.ilPreviewGUI.php.

ilPreviewGUI::$ctrl = null

private

Definition at line 22 of file class.ilPreviewGUI.php.

ilPreviewGUI::$initialized = false

staticprivate

Definition at line 25 of file class.ilPreviewGUI.php.

ilPreviewGUI::$lng = null

private

Definition at line 23 of file class.ilPreviewGUI.php.

Referenced by __construct(), and initPreview().

ilPreviewGUI::$node_id = null

private

Definition at line 17 of file class.ilPreviewGUI.php.

Referenced by getHtmlId().

ilPreviewGUI::$obj_id = null

private

Definition at line 18 of file class.ilPreviewGUI.php.

ilPreviewGUI::$preview = null

private

Definition at line 19 of file class.ilPreviewGUI.php.

const ilPreviewGUI::CONTEXT_REPOSITORY = 1

Definition at line 27 of file class.ilPreviewGUI.php.

Referenced by ilObjFileGUI\infoScreenForward(), and ilDataCollectionDatatype\parseHTML().

const ilPreviewGUI::CONTEXT_WORKSPACE = 2

Definition at line 28 of file class.ilPreviewGUI.php.

Referenced by ilObjFileGUI\infoScreenForward().

The documentation for this class was generated from the following file:

Services/Preview/classes/class.ilPreviewGUI.php

Public Member Functions

Data Fields

Private Member Functions

Static Private Member Functions

Private Attributes

Static Private Attributes

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Field Documentation