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PopupWidget.js
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PopupWidget.js
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/**
* PopupWidget is a container for content. The popup is overlaid and positioned absolutely.
* By default, each popup has an anchor that points toward its origin.
* Please see the [OOjs UI documentation on Mediawiki] [1] for more information and examples.
*
* Unlike most widgets, PopupWidget is initially hidden and must be shown by calling #toggle.
*
* @example
* // A popup widget.
* var popup = new OO.ui.PopupWidget( {
* $content: $( '<p>Hi there!</p>' ),
* padded: true,
* width: 300
* } );
*
* $( 'body' ).append( popup.$element );
* // To display the popup, toggle the visibility to 'true'.
* popup.toggle( true );
*
* [1]: https://www.mediawiki.org/wiki/OOjs_UI/Widgets/Popups
*
* @class
* @extends OO.ui.Widget
* @mixins OO.ui.mixin.LabelElement
* @mixins OO.ui.mixin.ClippableElement
* @mixins OO.ui.mixin.FloatableElement
*
* @constructor
* @param {Object} [config] Configuration options
* @cfg {number} [width=320] Width of popup in pixels
* @cfg {number} [height] Height of popup in pixels. Omit to use the automatic height.
* @cfg {boolean} [anchor=true] Show anchor pointing to origin of popup
* @cfg {string} [position='below'] Where to position the popup relative to $floatableContainer
* 'above': Put popup above $floatableContainer; anchor points down to the horizontal center
* of $floatableContainer
* 'below': Put popup below $floatableContainer; anchor points up to the horizontal center
* of $floatableContainer
* 'before': Put popup to the left (LTR) / right (RTL) of $floatableContainer; anchor points
* endwards (right/left) to the vertical center of $floatableContainer
* 'after': Put popup to the right (LTR) / left (RTL) of $floatableContainer; anchor points
* startwards (left/right) to the vertical center of $floatableContainer
* @cfg {string} [align='center'] How to align the popup to $floatableContainer
* 'forwards': If position is above/below, move the popup as far endwards (right in LTR, left in RTL)
* as possible while still keeping the anchor within the popup;
* if position is before/after, move the popup as far downwards as possible.
* 'backwards': If position is above/below, move the popup as far startwards (left in LTR, right in RTL)
* as possible while still keeping the anchor within the popup;
* if position in before/after, move the popup as far upwards as possible.
* 'center': Horizontally (if position is above/below) or vertically (before/after) align the center
* of the popup with the center of $floatableContainer.
* 'force-left': Alias for 'forwards' in LTR and 'backwards' in RTL
* 'force-right': Alias for 'backwards' in RTL and 'forwards' in LTR
* @cfg {jQuery} [$container] Constrain the popup to the boundaries of the specified container.
* See the [OOjs UI docs on MediaWiki][3] for an example.
* [3]: https://www.mediawiki.org/wiki/OOjs_UI/Widgets/Popups#containerExample
* @cfg {number} [containerPadding=10] Padding between the popup and its container, specified as a number of pixels.
* @cfg {jQuery} [$content] Content to append to the popup's body
* @cfg {jQuery} [$footer] Content to append to the popup's footer
* @cfg {boolean} [autoClose=false] Automatically close the popup when it loses focus.
* @cfg {jQuery} [$autoCloseIgnore] Elements that will not close the popup when clicked.
* This config option is only relevant if #autoClose is set to `true`. See the [OOjs UI docs on MediaWiki][2]
* for an example.
* [2]: https://www.mediawiki.org/wiki/OOjs_UI/Widgets/Popups#autocloseExample
* @cfg {boolean} [head=false] Show a popup header that contains a #label (if specified) and close
* button.
* @cfg {boolean} [padded=false] Add padding to the popup's body
*/
OO.ui.PopupWidget = function OoUiPopupWidget( config ) {
// Configuration initialization
config = config || {};
// Parent constructor
OO.ui.PopupWidget.parent.call( this, config );
// Properties (must be set before ClippableElement constructor call)
this.$body = $( '<div>' );
this.$popup = $( '<div>' );
// Mixin constructors
OO.ui.mixin.LabelElement.call( this, config );
OO.ui.mixin.ClippableElement.call( this, $.extend( {}, config, {
$clippable: this.$body,
$clippableContainer: this.$popup
} ) );
OO.ui.mixin.FloatableElement.call( this, config );
// Properties
this.$anchor = $( '<div>' );
// If undefined, will be computed lazily in updateDimensions()
this.$container = config.$container;
this.containerPadding = config.containerPadding !== undefined ? config.containerPadding : 10;
this.autoClose = !!config.autoClose;
this.$autoCloseIgnore = config.$autoCloseIgnore;
this.transitionTimeout = null;
this.anchored = false;
this.width = config.width !== undefined ? config.width : 320;
this.height = config.height !== undefined ? config.height : null;
this.onMouseDownHandler = this.onMouseDown.bind( this );
this.onDocumentKeyDownHandler = this.onDocumentKeyDown.bind( this );
// Initialization
this.toggleAnchor( config.anchor === undefined || config.anchor );
this.setAlignment( config.align || 'center' );
this.setPosition( config.position || 'below' );
this.$body.addClass( 'oo-ui-popupWidget-body' );
this.$anchor.addClass( 'oo-ui-popupWidget-anchor' );
this.$popup
.addClass( 'oo-ui-popupWidget-popup' )
.append( this.$body );
this.$element
.addClass( 'oo-ui-popupWidget' )
.append( this.$popup, this.$anchor );
// Move content, which was added to #$element by OO.ui.Widget, to the body
// FIXME This is gross, we should use '$body' or something for the config
if ( config.$content instanceof jQuery ) {
this.$body.append( config.$content );
}
if ( config.padded ) {
this.$body.addClass( 'oo-ui-popupWidget-body-padded' );
}
if ( config.head ) {
this.closeButton = new OO.ui.ButtonWidget( { framed: false, icon: 'close' } );
this.closeButton.connect( this, { click: 'onCloseButtonClick' } );
this.$head = $( '<div>' )
.addClass( 'oo-ui-popupWidget-head' )
.append( this.$label, this.closeButton.$element );
this.$popup.prepend( this.$head );
}
if ( config.$footer ) {
this.$footer = $( '<div>' )
.addClass( 'oo-ui-popupWidget-footer' )
.append( config.$footer );
this.$popup.append( this.$footer );
}
// Initially hidden - using #toggle may cause errors if subclasses override toggle with methods
// that reference properties not initialized at that time of parent class construction
// TODO: Find a better way to handle post-constructor setup
this.visible = false;
this.$element.addClass( 'oo-ui-element-hidden' );
};
/* Setup */
OO.inheritClass( OO.ui.PopupWidget, OO.ui.Widget );
OO.mixinClass( OO.ui.PopupWidget, OO.ui.mixin.LabelElement );
OO.mixinClass( OO.ui.PopupWidget, OO.ui.mixin.ClippableElement );
OO.mixinClass( OO.ui.PopupWidget, OO.ui.mixin.FloatableElement );
/* Events */
/**
* @event ready
*
* The popup is ready: it is visible and has been positioned and clipped.
*/
/* Methods */
/**
* Handles mouse down events.
*
* @private
* @param {MouseEvent} e Mouse down event
*/
OO.ui.PopupWidget.prototype.onMouseDown = function ( e ) {
if (
this.isVisible() &&
!OO.ui.contains( this.$element.add( this.$autoCloseIgnore ).get(), e.target, true )
) {
this.toggle( false );
}
};
/**
* Bind mouse down listener.
*
* @private
*/
OO.ui.PopupWidget.prototype.bindMouseDownListener = function () {
// Capture clicks outside popup
this.getElementWindow().addEventListener( 'mousedown', this.onMouseDownHandler, true );
};
/**
* Handles close button click events.
*
* @private
*/
OO.ui.PopupWidget.prototype.onCloseButtonClick = function () {
if ( this.isVisible() ) {
this.toggle( false );
}
};
/**
* Unbind mouse down listener.
*
* @private
*/
OO.ui.PopupWidget.prototype.unbindMouseDownListener = function () {
this.getElementWindow().removeEventListener( 'mousedown', this.onMouseDownHandler, true );
};
/**
* Handles key down events.
*
* @private
* @param {KeyboardEvent} e Key down event
*/
OO.ui.PopupWidget.prototype.onDocumentKeyDown = function ( e ) {
if (
e.which === OO.ui.Keys.ESCAPE &&
this.isVisible()
) {
this.toggle( false );
e.preventDefault();
e.stopPropagation();
}
};
/**
* Bind key down listener.
*
* @private
*/
OO.ui.PopupWidget.prototype.bindKeyDownListener = function () {
this.getElementWindow().addEventListener( 'keydown', this.onDocumentKeyDownHandler, true );
};
/**
* Unbind key down listener.
*
* @private
*/
OO.ui.PopupWidget.prototype.unbindKeyDownListener = function () {
this.getElementWindow().removeEventListener( 'keydown', this.onDocumentKeyDownHandler, true );
};
/**
* Show, hide, or toggle the visibility of the anchor.
*
* @param {boolean} [show] Show anchor, omit to toggle
*/
OO.ui.PopupWidget.prototype.toggleAnchor = function ( show ) {
show = show === undefined ? !this.anchored : !!show;
if ( this.anchored !== show ) {
if ( show ) {
this.$element.addClass( 'oo-ui-popupWidget-anchored' );
this.$element.addClass( 'oo-ui-popupWidget-anchored-' + this.anchorEdge );
} else {
this.$element.removeClass( 'oo-ui-popupWidget-anchored' );
this.$element.removeClass( 'oo-ui-popupWidget-anchored-' + this.anchorEdge );
}
this.anchored = show;
}
};
/**
* Change which edge the anchor appears on.
*
* @param {string} edge 'top', 'bottom', 'start' or 'end'
*/
OO.ui.PopupWidget.prototype.setAnchorEdge = function ( edge ) {
if ( [ 'top', 'bottom', 'start', 'end' ].indexOf( edge ) === -1 ) {
throw new Error( 'Invalid value for edge: ' + edge );
}
if ( this.anchorEdge !== null ) {
this.$element.removeClass( 'oo-ui-popupWidget-anchored-' + this.anchorEdge );
}
this.anchorEdge = edge;
if ( this.anchored ) {
this.$element.addClass( 'oo-ui-popupWidget-anchored-' + edge );
}
};
/**
* Check if the anchor is visible.
*
* @return {boolean} Anchor is visible
*/
OO.ui.PopupWidget.prototype.hasAnchor = function () {
return this.anchored;
};
/**
* Toggle visibility of the popup. The popup is initially hidden and must be shown by calling
* `.toggle( true )` after its #$element is attached to the DOM.
*
* Do not show the popup while it is not attached to the DOM. The calculations required to display
* it in the right place and with the right dimensions only work correctly while it is attached.
* Side-effects may include broken interface and exceptions being thrown. This wasn't always
* strictly enforced, so currently it only generates a warning in the browser console.
*
* @fires ready
* @inheritdoc
*/
OO.ui.PopupWidget.prototype.toggle = function ( show ) {
var change;
show = show === undefined ? !this.isVisible() : !!show;
change = show !== this.isVisible();
if ( show && !this.warnedUnattached && !this.isElementAttached() ) {
OO.ui.warnDeprecation( 'PopupWidget#toggle: Before calling this method, the popup must be attached to the DOM.' );
this.warnedUnattached = true;
}
if ( show && !this.$floatableContainer && this.isElementAttached() ) {
// Fall back to the parent node if the floatableContainer is not set
this.setFloatableContainer( this.$element.parent() );
}
// Parent method
OO.ui.PopupWidget.parent.prototype.toggle.call( this, show );
if ( change ) {
this.togglePositioning( show && !!this.$floatableContainer );
if ( show ) {
if ( this.autoClose ) {
this.bindMouseDownListener();
this.bindKeyDownListener();
}
this.updateDimensions();
this.toggleClipping( true );
this.emit( 'ready' );
} else {
this.toggleClipping( false );
if ( this.autoClose ) {
this.unbindMouseDownListener();
this.unbindKeyDownListener();
}
}
}
return this;
};
/**
* Set the size of the popup.
*
* Changing the size may also change the popup's position depending on the alignment.
*
* @param {number} width Width in pixels
* @param {number} height Height in pixels
* @param {boolean} [transition=false] Use a smooth transition
* @chainable
*/
OO.ui.PopupWidget.prototype.setSize = function ( width, height, transition ) {
this.width = width;
this.height = height !== undefined ? height : null;
if ( this.isVisible() ) {
this.updateDimensions( transition );
}
};
/**
* Update the size and position.
*
* Only use this to keep the popup properly anchored. Use #setSize to change the size, and this will
* be called automatically.
*
* @param {boolean} [transition=false] Use a smooth transition
* @chainable
*/
OO.ui.PopupWidget.prototype.updateDimensions = function ( transition ) {
var widget = this;
// Prevent transition from being interrupted
clearTimeout( this.transitionTimeout );
if ( transition ) {
// Enable transition
this.$element.addClass( 'oo-ui-popupWidget-transitioning' );
}
this.position();
if ( transition ) {
// Prevent transitioning after transition is complete
this.transitionTimeout = setTimeout( function () {
widget.$element.removeClass( 'oo-ui-popupWidget-transitioning' );
}, 200 );
} else {
// Prevent transitioning immediately
this.$element.removeClass( 'oo-ui-popupWidget-transitioning' );
}
};
/**
* @inheritdoc
*/
OO.ui.PopupWidget.prototype.computePosition = function () {
var direction, align, vertical, start, end, near, far, sizeProp, popupSize, anchorSize, anchorPos,
anchorOffset, anchorMargin, parentPosition, positionProp, positionAdjustment, floatablePos,
offsetParentPos, containerPos,
popupPos = {},
anchorCss = { left: '', right: '', top: '', bottom: '' },
alignMap = {
ltr: {
'force-left': 'backwards',
'force-right': 'forwards'
},
rtl: {
'force-left': 'forwards',
'force-right': 'backwards'
}
},
anchorEdgeMap = {
above: 'bottom',
below: 'top',
before: 'end',
after: 'start'
},
hPosMap = {
forwards: 'start',
center: 'center',
backwards: this.anchored ? 'before' : 'end'
},
vPosMap = {
forwards: 'top',
center: 'center',
backwards: 'bottom'
};
if ( !this.$container ) {
// Lazy-initialize $container if not specified in constructor
this.$container = $( this.getClosestScrollableElementContainer() );
}
direction = this.$container.css( 'direction' );
// Set height and width before we do anything else, since it might cause our measurements
// to change (e.g. due to scrollbars appearing or disappearing), and it also affects centering
this.$popup.css( {
width: this.width,
height: this.height !== null ? this.height : 'auto'
} );
align = alignMap[ direction ][ this.align ] || this.align;
// If the popup is positioned before or after, then the anchor positioning is vertical, otherwise horizontal
vertical = this.popupPosition === 'before' || this.popupPosition === 'after';
start = vertical ? 'top' : ( direction === 'rtl' ? 'right' : 'left' );
end = vertical ? 'bottom' : ( direction === 'rtl' ? 'left' : 'right' );
near = vertical ? 'top' : 'left';
far = vertical ? 'bottom' : 'right';
sizeProp = vertical ? 'Height' : 'Width';
popupSize = vertical ? ( this.height || this.$popup.height() ) : this.width;
this.setAnchorEdge( anchorEdgeMap[ this.popupPosition ] );
this.horizontalPosition = vertical ? this.popupPosition : hPosMap[ align ];
this.verticalPosition = vertical ? vPosMap[ align ] : this.popupPosition;
// Parent method
parentPosition = OO.ui.mixin.FloatableElement.prototype.computePosition.call( this );
// Find out which property FloatableElement used for positioning, and adjust that value
positionProp = vertical ?
( parentPosition.top !== '' ? 'top' : 'bottom' ) :
( parentPosition.left !== '' ? 'left' : 'right' );
// Figure out where the near and far edges of the popup and $floatableContainer are
floatablePos = this.$floatableContainer.offset();
floatablePos[ far ] = floatablePos[ near ] + this.$floatableContainer[ 'outer' + sizeProp ]();
// Measure where the offsetParent is and compute our position based on that and parentPosition
offsetParentPos = this.$element.offsetParent().offset();
if ( positionProp === near ) {
popupPos[ near ] = offsetParentPos[ near ] + parentPosition[ near ];
popupPos[ far ] = popupPos[ near ] + popupSize;
} else {
popupPos[ far ] = offsetParentPos[ near ] +
this.$element.offsetParent()[ 'inner' + sizeProp ]() - parentPosition[ far ];
popupPos[ near ] = popupPos[ far ] - popupSize;
}
if ( this.anchored ) {
// Position the anchor (which is positioned relative to the popup) to point to $floatableContainer
anchorPos = ( floatablePos[ start ] + floatablePos[ end ] ) / 2;
anchorOffset = ( start === far ? -1 : 1 ) * ( anchorPos - popupPos[ start ] );
// If the anchor is less than 2*anchorSize from either edge, move the popup to make more space
// this.$anchor.width()/height() returns 0 because of the CSS trickery we use, so use scrollWidth/Height
anchorSize = this.$anchor[ 0 ][ 'scroll' + sizeProp ];
anchorMargin = parseFloat( this.$anchor.css( 'margin-' + start ) );
if ( anchorOffset + anchorMargin < 2 * anchorSize ) {
// Not enough space for the anchor on the start side; pull the popup startwards
positionAdjustment = ( positionProp === start ? -1 : 1 ) *
( 2 * anchorSize - ( anchorOffset + anchorMargin ) );
} else if ( anchorOffset + anchorMargin > popupSize - 2 * anchorSize ) {
// Not enough space for the anchor on the end side; pull the popup endwards
positionAdjustment = ( positionProp === end ? -1 : 1 ) *
( anchorOffset + anchorMargin - ( popupSize - 2 * anchorSize ) );
} else {
positionAdjustment = 0;
}
} else {
positionAdjustment = 0;
}
// Check if the popup will go beyond the edge of this.$container
containerPos = this.$container.offset();
containerPos[ far ] = containerPos[ near ] + this.$container[ 'inner' + sizeProp ]();
// Take into account how much the popup will move because of the adjustments we're going to make
popupPos[ near ] += ( positionProp === near ? 1 : -1 ) * positionAdjustment;
popupPos[ far ] += ( positionProp === near ? 1 : -1 ) * positionAdjustment;
if ( containerPos[ near ] + this.containerPadding > popupPos[ near ] ) {
// Popup goes beyond the near (left/top) edge, move it to the right/bottom
positionAdjustment += ( positionProp === near ? 1 : -1 ) *
( containerPos[ near ] + this.containerPadding - popupPos[ near ] );
} else if ( containerPos[ far ] - this.containerPadding < popupPos[ far ] ) {
// Popup goes beyond the far (right/bottom) edge, move it to the left/top
positionAdjustment += ( positionProp === far ? 1 : -1 ) *
( popupPos[ far ] - ( containerPos[ far ] - this.containerPadding ) );
}
if ( this.anchored ) {
// Adjust anchorOffset for positionAdjustment
anchorOffset += ( positionProp === start ? -1 : 1 ) * positionAdjustment;
// Position the anchor
anchorCss[ start ] = anchorOffset;
this.$anchor.css( anchorCss );
}
// Move the popup if needed
parentPosition[ positionProp ] += positionAdjustment;
return parentPosition;
};
/**
* Set popup alignment
*
* @param {string} [align=center] Alignment of the popup, `center`, `force-left`, `force-right`,
* `backwards` or `forwards`.
*/
OO.ui.PopupWidget.prototype.setAlignment = function ( align ) {
// Validate alignment
if ( [ 'force-left', 'force-right', 'backwards', 'forwards', 'center' ].indexOf( align ) > -1 ) {
this.align = align;
} else {
this.align = 'center';
}
this.position();
};
/**
* Get popup alignment
*
* @return {string} Alignment of the popup, `center`, `force-left`, `force-right`,
* `backwards` or `forwards`.
*/
OO.ui.PopupWidget.prototype.getAlignment = function () {
return this.align;
};
/**
* Change the positioning of the popup.
*
* @param {string} position 'above', 'below', 'before' or 'after'
*/
OO.ui.PopupWidget.prototype.setPosition = function ( position ) {
if ( [ 'above', 'below', 'before', 'after' ].indexOf( position ) === -1 ) {
position = 'below';
}
this.popupPosition = position;
this.position();
};
/**
* Get popup positioning.
*
* @return {string} 'above', 'below', 'before' or 'after'
*/
OO.ui.PopupWidget.prototype.getPosition = function () {
return this.popupPosition;
};
/**
* Get an ID of the body element, this can be used as the
* `aria-describedby` attribute for an input field.
*
* @return {string} The ID of the body element
*/
OO.ui.PopupWidget.prototype.getBodyId = function () {
var id = this.$body.attr( 'id' );
if ( id === undefined ) {
id = OO.ui.generateElementId();
this.$body.attr( 'id', id );
}
return id;
};