Production Status: SNEAK PEEK

The Table of Contents component examines a page for HTML heading elements, and generates and formats a list of links to headings that can be used to navigate the page. It is used by the User Interface Options component.

See Also
Table of Contents Model Builder

Table of Contents Levels

User Interface Options API

Creator	`fluid.tableOfContents(container, options)`
Supported Events	`onReady` Fires when the component has finished instantiating and ready to use. `onRefresh` Fires when the table of contents needs to be refreshed. This firing of this event also triggers the refresh. `afterRender` Fires after the table of contents has been rendered.
Methods	`headingTextToAnchorInfo(headings, GUID)` Returns the information required for generating the anchor for one of the headings. `generateGUID()` Generates an unique ID. This ID is used in the process of creating anchors for the headings. `locateHeadings()` Returns a jQuery object containing all of the headings to be included in the Table of Contents. `hide()` Hides the table of contents. `insertAnchor(name, element, anchorClass)` Inserts anchors before each heading. `show()` Shows the table of contents.
Options	`listeners` See #Supported Events for information. `selectors` See below.
Selectors	`headings` Identifies the headings in the page `tocContainer` Container for the generated table of contents `tocAnchors` The selector to identify the generated table of contents anchors.
Subcomponents	`levels` Renders the generated table of contents. `modelBuilder` Builds an internal model of the structure of the headings in the document.

Creator

back to top Use the following function to create a Table of Contents component:

fluid.tableOfContents(container, options)

Method	`fluid.tableOfContents(container, options);`
Description	Instantiates a Table of Contents component applied to the specified container.
Parameters	`container` A CSS-based selectors, single-element jQuery object, or DOM element that identifies the root DOM node where the Table of Contents component should search for headings. `options` An optional data structure that configures the Table of Contents component, as described below.
Returns	The Table of Contents component
Examples	var toc = fluid.tableOfContents("#main");
Notes	The Table of Contents only processes headings found inside the element provided by the `container` argument. This allows the component to be applied to only a section of a page, if desired. Keep in mind that the generated list of links will be placed inside the `container`, as specified by the `tocContainer` selector.

Supported Events

back to top

Listeners can be attached to any supported events through a component's listeners option. Values can be a function reference (not a string function name) or an anonymous function definition, as illustrated below:

var myComponent = component.name("#myContainerID", {
    listeners: {
        eventName1: functionName,
        eventName2: function (params) {
            ...
        }
    }
});

For information on the different types of events, see Infusion Event System.

onReady

Description	This event fires when the DOM is fully instantiated and ready to use.
Type	default
Parameters	The instantiated table of contents component
Availability	Infusion 1.5 and later

onRefresh

Description	This event fires when the Table of Contents Levels need to be refreshed. The firing triggers the refresh of the Table of Contents Levels subcomponent.
Type	default
Parameters	none
Availability	Infusion 1.5 and later

afterRender

Description	This event fires Fires when the table of contents is rendered.
Type	default
Parameters	The Table of Contents Levels subcomponent
Availability	Infusion 1.5 and later

Methods

back to top

This component has public methods that can be invoked by integrators as necessary. These methods are typcially implemented as Invokers, which resolve their arguments from the environment at invocation time. These methods can be configured by the integrator if necessary: arguments can be changed, and in fact the entire implementation function can be replaced by a custom function (though it is likely rare that this would be necessary or desirable).

Configuration of invokers should be carried by creating a grade, using the following pattern:

fluid.defaults("<new name of overriding grade>", {
    gradeNames: ["<name of grade being overridden", "autoInit"],
    invokers: {
        <invokerName>: {
            funcName: <implementation function name>,
            args: [<array of argument specifications>]
        }
    }
});

Example of overriding an invoker

The Infusion Pager component has a method called {{acquireDefaultRange}} which, by default, simply returns the total range. An integrator may wish to override this using their own custom function:

fluid.defaults("my.pager", {
    gradeNames: ["fluid.pager", "autoInit"],
    invokers: {
        acquireDefaultRange: {
            funcName: "my.pager.acquireDefaultRange
        }
    }
});

`headingTextToAnchorInfo(headings, GUID)`

Description	Returns the information required for generating the anchor for the heading.
Parameters	heading The heading, usually one of headings generated by `that.locate("headings")` GUID The unique ID used to identify the generated anchor.
Configurable	yes Default implementation: `"fluid.tableOfContents.headingTextToAnchorInfo"`
Availability	Infusion v1.5
See Also	generateGUID()

generateGUID()

Description	Used by the component in the creation of unique anchors for the headings. The default implementation uses fluid.allocateSimpleId.
Parameters	none
Configurable	yes Default implementation: `"fluid.allocateSimpleId"`
Availability	Infusion v1.4
See also	headingTextToAnchorInfo(headings, GUID)

locateHeadings()

Description	Used by the component to locate the headings to be used to generate the Table of Contents from. The default implementation finds all of the headings specified by the `headings` selector, minus the headings matching selectors specified in the `ignoreForToC` option.
Parameters	none
Configurable	yes Default implementation: `"fluid.tableOfContents.locateHeadings"`
Availability	Infusion v1.9

insertAnchor(name, element, anchorClass)

Description	Used by the component to create and insert anchors before each element linked to by the table of contents. The default implementation creates an HTML `<a>` element using the `name` parameter as both the name and id of the element and applies anchorClass to the element.
Parameters	name The name used in the creation of the anchor. element The element to insert the anchor before. anchorClass The css class to be applied to the anchor.
Configurable	yes Default implementation: `"fluid.tableOfContents.insertAnchor"`
Availability	Infusion v1.4 (note that the component signature changed in 1.5)

hide()

Description	Hides the generated table of contents.
Parameters	none
Configurable	no
Availability	Infusion v1.0
See also	show()

show()

Description	Shows the generated table of contents.
Parameters	none
Configurable	no
Availability	Infusion v1.0
See also	hide()

Options

back to top

The second argument to the creator function is the options argument. This is a JavaScript object containing name/value pairs: The name is the name of the option and the value is the desired setting. Components define their own default values for options, but integrators can override these defaults by providing new values using the options argument. For technical information about how options are merged with defaults, see Options Merging.

`selectors`

Description	See below for details.

ignoreForToc

Description	A key/value pairing where the keys are selectors representing headings to NOT include in the Table of Contents.
Example	"ignoreForToC": { "overviewPanel": ".flc-overviewPanel" }

Selectors

back to top

One of the options that can be provided to the component is a set of CSS-based selectors identifying where in the DOM different elements can be found. The value for the option is itself a Javascript object containing name/value pairs:

selectors: {
    selector1Name: "selector 1 string",
    selector2Name: "selector 2 string",
      ...
}

The component defines defaults for these selectors: If you use those defaults in your markup, you do not need to specify the selectors option. If you do choose to override any of the selectors, you can specify your custom selector using this option.

The selectors supported by Table of Contents are described below.

`headings`

Description	This selector will be used to identify all of the headings in the page. These headings will be used in the table of contents (after filtering).
Default	`":header:visible"`
Example	fluid.tableOfContents(".myContainer", { selectors: { headings: "h1,h2,h3" // limit to only three levels deep } });

`tocContainer`

Description	This selector identifies the container into which the generated table of contents will be inserted. This will typically be an empty `<div>` element.
Default	`".flc-toc-tocContainer"`
Example	fluid.tableOfContents(".myContainer", { selectors: { tocContainer: "#tableOfContentsDiv" } });

`tocAnchors`

Description	This selector identifies the generated table of contents anchors. These anchors are removed at every refresh before new anchors are added.
Default	`".flc-toc-anchors"`
Example	fluid.tableOfContents(".myContainer", { selectors: { tocAnchors: "#tableOfContentsAnchors" } });

Subcomponents

Subcomponents can be configured though the parent component's components option using the following pattern:

parent.component.name(".myContainer", {
    components: {
        <subcomponentName>: {
            options: {
                <subcomponent options>
            }
        }
    }
});

levels

Description	The `levels` subcomponent renders the generated table of contents based on a template.
Default implementation	`fluid.tableOfContents.levels`
See also	Table of Contents Levels

modelBuilder

Description	The `modelBuilder` subcomponent builds an internal model of the structure of the headings in the document. This model is used by the Table of Contents component to generated a hierarchical table of contents.
Default implementation	`fluid.tableOfContents.modelBuilder`
See also	Table of Contents Model Builder

Browser not supported