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Preview Pane

This page is used to customize the preview pane titles and text. It is also possible to specify if multiple preview

panes can be open.

Progress Bar

Realtime Processing

Used to enable or disable real-time processing, set the resolution and maximum number of processed pages.

Suggested Pages

Used for setting the maximum and minimum number of selected pages, as well as the icon indicating selected

pages in the preview pane.

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Preview Pane Trigger

Configure the following settings of Pane Trigger:



Should the preview pane trigger be present on the site



Should viewing more than only crawled pages preview require additional click on a control



Text of that control



Images of trigger controls



Text of trigger controls

Full Screen Preview settings

Dialog Layout

Full screen preview contains all the layout elements and behavior of a modal dialog. It contains the following

elements:



Overlay - when open, the overlay covers the entire underlying window beneath the dialog. It

deactivates all underlying controls on the page.



Dialog - the menu and frame of the dialog. The options specify styling, background color and margin

between the dialog and the browser window.



Menu - menu options specify the menu color and opacity as well as the spacing between buttons and

page number label.



Outer Border - the border surrounding the outside if the dialog. Options specify its size, style, color and

opacity.



Inner Border - the border surrounding the inside if the dialog. Same options as for outer border.



Image Border - the border surrounding the preview image. Same options as for outer border.

The color and opacity settings allow for translucency. Opacity is a percentage between 0 (transparent) and 100

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Zooming

First dropdown menu represents the zoom level when full screen preview is opened:



All – page will fit the screen



Real – actual page size



Hor – page will fit horizontally



Ver – page will fit vertically

The zoom level may be reset to this default value every time new page is loaded, depending on the ‘Reset

zoom mode’ checkbox.

Next settings influence zoom steps for mouse click and mouse whelm as well as the minimum and maximum

zoom levels.

Zoom buttons which cannot be used at the moment – are inactive – can be set to be hidden.

Each zoom button can be enabled or disabled. Their keyboard shortcut as well as active/inactive images can be

selected.

Navigation

Navigation buttons have the same setting groups as the zooming buttons.

Dialog Closing

This page sets if the full screen preview should be closed by:



Clicking outside the image



Double click



Close window button



Escape button

The close window button image can also be selected.

Modifying the Ontolica Preview Render Template for a new Look and Feel

It is possible to edit these XSLT files by rearranging the elements inside them to achieve a different look and

feel. The format is based on html elements with specific id values and class names. It contains 3 different types

of elements: Container Templates, State Elements and Item Elements.

The Container Templates, can contain any of the State Elements and Item Elements. The State Elements can

contain any of the Item Elements.

If an Item Element is located directly in a Container Template, it is always visible. When an Item Element is

located inside a State Element, it is only visible during that state of the preview processing flow.

Most Item Elements can be configured through the UI and are named accordingly to where they logically fit,

such as the DocumentPreviewTriggerTemplate that logically contains a DocumentPreviewTriggerIconElement

and a DocumentPreviewTriggerTextElement. It is however not a rule that Item Elements must appear inside

certain Container Templates.

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Container Templates.

These templates are automatically cloned and inserted into the page layout inside the corresponding

placeholders in the page layout (see section ‘Integration Type’ for more details on containers). Each clone of a

Container Template applies to a single document or webpage URL (typically a URL to a search result or

document in a document library). The URL is defined in the corresponding placeholder in the page layout.

Container Templates are identified by their id value.



FirstPagePreviewTemplate

This template is showed inside the First Page Preview placeholder.

It is typically used to show the PagePreviewElement and the PagePreviewPageCountElement elements

which display preview images and the total page count. Inside this FirstPagePreviewTemplate, any

PagePreviewElement will always show the first page preview image.



DocumentPagePreviewTemplate

This template is showed inside the DocumentPreviewElement element.

It is typically used to show the PagePreviewElement element which displays a page preview image.

Inside this DocumentPagePreviewTemplate, the preview image that the PagePreviewElement element

will show, is controlled by the DocumentPreviewElement and it will always correspond to the position

insde the DocumentPreviewElement. This way, if the DocumentPreviewElement contains e.g. 4

DocumentPagePreviewTemplates, then the PagePreviewElements inside these will show the pages 1-4

accordingly.



DocumentPreviewTriggerTemplate

This template is showed inside the Trigger placeholder.

It is typically used to show the DocumentPreviewTriggerIconElement and the

DocumentPreviewTriggerTextElement elements which display an icon and text link that opens/closes

the Full Document Preview pane when clicked.



DocumentPreviewTemplate

This template is showed inside the Full Document Preview Container.

It is typically used to show DocumentPagePreviewTemplates which displays preview images.

Additionally it usually shows other Item Elements, wrapped inside State Elements. This is e.g. progress

information and links to suggested pages etc.

When a DocumentPagePreviewTemplate is opened, it starts the preview processing flow and the State

Elements are automatically displayed and hidden according to the current processing state.

State Elements

These elements are implicitly cloned and injected into the layout as they are contained in Container Template

elements. State Elements are automatically hidden and displayed based on the state of the current processing

flow. They are identified by their class value which must contain the name matching the State Element.



DocumentPreviewDocumentInfoLoadingElement

Elements inside this State Element is displayed from the beginning of a processing flow and until the

document has been analyzed and a total pagecount is available.



DocumentPreviewDocumentInfoElement

Elements inside this State Element is displayed immediately after the

DocumentPreviewDocumentInfoLoadingElement state and throughout the rest of the processing flow.

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

DocumentPreviewSuggestedPagesLoadingElement



Elements inside this State Element is immediately after the

DocumentPreviewDocumentInfoLoadingElement state and until the document has been analyzed and

all suggested pages have been loaded into the front-end.



DocumentPreviewSuggestedPagesElement

Elements inside this State Element is displayed immediately after the

DocumentPreviewSuggestedPagesLoadingElement state and throughout the rest of the processing

flow.

Item Elements

These elements make up the visual part of the Preview UI. They are implicitly cloned and injected into the

layout as they are contained in Container Template elements or State Elements. Their visibility is therefore also

dependent on that of its parent container. They are identified by their class value which must contain the name

matching the Item Element.



PagePreviewElement

Shows an image of the first page of a document. Its size and ‘look & feel’ is controlled through the UI.



PagePreviewPageCountElement

Shows the page count of the document. This requires that the “Include Text Analysis Data” setting is

enabled on the Preview Content Source (see section ‘Configuring the gatherer service’).



DocumentPreviewClickToProcessElement

If Front End settings are configured to first show the pre crawled images before performing the

realtime processing, this element shows a link button to start the realtime processing.



DocumentPreviewDocumentInfoPageCountLoadingTitleElement

Shows a text message informing the user that the document is currently being opened and analyzed.

This text is localized in the resource files but can also be customized through the UI.



DocumentPreviewSmallLoadingIconElement

Shows a loading icon to inform the user that processing is being performed. This icon is per default an

animated gif and can be configured through the UI. The icon can be different depending on which

Container Template it is located within.



DocumentPreviewSuggestedPagesIconElement

Shows an icon indicating representing a suggested page. If this Item Element is located inside a

FirstPagePreviewTemplate or a DocumentPagePreviewTemplate, it is only visible if the displayed page

is also a suggested page. If located inside other Container Templates it is always visible.



DocumentPreviewSuggestedPagesPageNumbersTitleElement

Shows a title for the DocumentPreviewSuggestedPagesPageNumbersElement. This text is localized in

the resource files but can also be customized through the UI.



DocumentPreviewSuggestedPagesPageNumbersElement

Shows link buttons to suggested pages. Links are only shown when the page containing highlighting is

processed and ready. If the “ rawled pages only” setting is enabled, the links are shown immediately

but only for the number of pages that has been pre crawled.



DocumentPreviewSuggestedPagesPageNumbersProgressBarElement

Shows an animated progress bar that displays the progress of the document analysis and conversion.

The progress bar starts when the document analysis is completed or immediately if the “Include Text

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Analysis Data” setting is enabled on the Preview ontent Source (see section ‘Configuring the gatherer

service’). The progress bar increments as the highlighted pages are processed. Note that it does not

reflect if the highlighted pages have been loaded by the browser, but only if they are available on the

server.



DocumentPreviewSuggestedPagesPageNumbersPercentageElement

Shows the progress of DocumentPreviewSuggestedPagesPageNumbersProgressBarElement as a text

message with the percentage normalized between 0 and 100. This Item Element can be added without

adding the DocumentPreviewSuggestedPagesPageNumbersProgressBarElement element.



DocumentPreviewDocumentInfoPageCountTitlePrefixElement

Shows a text prefix for displaying the progress of loading pages to the user. This Item Element is

typically shown just before the DocumentPreviewDocumentInfoLoadedPageCountElement element.

This text is localized in the resource files but can also be customized through the UI.



DocumentPreviewDocumentInfoLoadedPageCountElement

Shows how many pages that have been send to the browser as a text message. This Item Element is

typically shown just before the DocumentPreviewDocumentInfoPageCountTitleMiddleElement element.



DocumentPreviewDocumentInfoPageCountTitleMiddleElement

Shows a text separator for displaying the progress of loading pages to the user. This Item Element is

typically shown just before the DocumentPreviewDocumentInfoPageCountElement element. This text is

localized in the resource files but can also be customized through the UI.



DocumentPreviewDocumentInfoPageCountElement

Shows the total number of pages in the document or webpage. If the “Include Text Analysis Data”

setting is enabled on the Preview ontent Source (see section ‘Configuring the gatherer service’), the

number is displayed immediately. The number is then updated when the realtime processing is

completed if the document has changed since it was pre crawled. This Item Element is typically shown

just before the DocumentPreviewDocumentInfoPageCountTitlePostfixElement element.



DocumentPreviewDocumentInfoPageCountTitlePostfixElement

Shows a text postfix for displaying the progress of loading pages to the user. This text is localized in the

resource files but can also be customized through the UI.



InDocumentSearchElement

This Item Element is not shown visually but acts as a container for the other InDocumentSearch Item

Elements. When turning the ‘In Document Search’ feature On or Off in the UI, this Item Element is

displayed or hidden accordingly.



InDocumentSearchTextBoxElement

Shows a text box in which to type text to search for in the document or web page. This text will then be

highlighted in the pages (replacing any current highlighting) and the suggested pages will also be

updated accordingly. Pressing the Enter key will trigger the ‘In Document Search’ processing.



InDocumentSearchButtonElement

Shows an image working as a button for triggering the ‘In Document Search’ processing of the text

specified in InDocumentSearchTextBoxElement.



InDocumentSearchButtonCancelElement

Shows an image working as a button for canceling the ‘In Document Search’ processing. It also reverts

back to the original pages with the original highlighting and suggested pages.



DocumentPreviewElement

Shows a panel for displaying all pages in a document or webpage. First time this Item Element is

opened, it starts the processing flow which will then populate this Item Element with

DocumentPagePreviewTemplates, one for each page in the document.



DocumentPreviewTriggerIconElement

Shows an icon representing if the DocumentPreviewElement is opened or closed. Clicking this icon then

opens or closes the DocumentPreviewElement accordingly. If the DocumentPreviewElement has not yet

been opened it starts the processing flow.



DocumentPreviewTriggerTextElement

Shows a link button with text representing if the DocumentPreviewElement is opened or closed.

Clicking this link button then opens or closes the DocumentPreviewElement accordingly. If the

DocumentPreviewElement has not yet been opened it starts the processing flow.

Example of a simple Preview Template

The following template shows and example of the minimum required formatting to make preview fully

operational and using all elements in the live cycle preview. All elements are optional and can be rearranged to

your liking, but functionality is lost if they are excluded from the template.

</span>

</span>

<div>

</div>

</span>

</span>

</span>

</span>

</span>

</span>

</span>

</span>

How to configure Preview for specific infrastructures

Ontolica Preview is designed to be just as versatile as real life infrastructures of SharePoint farms are. It can be

optimized to use the abilities or scale with the limitations of your hardware as well as adjust to your available

bandwidth, disk space, number of documents/websites etc. etc.

Configuring Ontolica Preview to meet your exact requirements includes changing both the behavior of the

Preview services as well as the Front-end settings.

Trimming Ontolica Preview settings to available memory on servers

Ontolica Preview uses memory caching a number of different places to optimize performance. Preview images

are cached in the IIS processes to optimize performance and reduce database access. The Preview Gatherer

also uses caching by downloading documents to a queue to avoid having the document converter waiting for a

document to be downloaded before it can be processed.

Farms with limited memory (4 Gigabytes or less per front-end server)

Depending on how Preview is used by your users consider the following changes.



Turning of memory caching for full document previews.

This can significantly improve access times to you web applications, but it causes more database access

when accessing same full document preview repeatedly and repeated previews of the same

documents load slower. This change requires that you have installed the Preview database.



Turning of memory caching for In Document search.

This can significantly improve access times to you web applications, but it causes more database access

when accessing same full document preview repeatedly and repeated previews of the same

documents load slower. This change requires that you have installed the Preview database.



Reducing Download queue size on the Gatherer service search.

If you have many large documents, then reducing the Download queue size to the same number as you

have the Parallel conversion processes, causes the Gatherer service to use less memory but it can slow

down the Gatherer service if it often waits for documents to download. This only affects memory

consumption on the server where the Gatherer service is running.



Turning off In Document search.

If users are often using this function, turning it off can significantly improve access times to you web

applications as searching inside the documents is both CPU and Memory intensive.

Confirming Successful Deployment and Configuration

Once you have deployed a Preview column to a document library or a Preview web part to a search or

Aggregate center, and completed the pre-indexing of the first-page thumbnail, you can confirm a successful

deployment by checking the following sections.

First page previews

A thumbnail with a preview of the first page is displayed in the first column of the document library or

Aggregate center or next to search results in a search center. This is only the case when the content sources,

where the document library is located, have been successfully crawled by the Ontolica Gatherer Service and

processed by the Ontolica Conversion Service.

Full Document Previews

When you click the first page preview in a document library, or the “Show document preview” button in

search/Aggregate centers, the full document preview strip opens just underneath that row. If the document

has many pages then a horizontal scroll bar will appear just below the preview images so that you can scroll to

see all pages or to locate a particular page.

On the right top of preview images, the number of total pages will also be displayed. The strip and preview

images disappear if user clicks the preview icon again. Putting the mouse over a page in the full document

preview strip will display a zoomed version of a preview image.

If you click the zoomed version of the preview image then the full preview version of the page will be opened.

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