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* VisualEditor Linear Selection class.
*
* @copyright See AUTHORS.txt
*/
/**
* @class
* @extends ve.ce.Selection
* @constructor
* @param {ve.ce.Surface} surface
* @param {ve.dm.Selection} model
*/
ve.ce.LinearSelection = function VeCeLinearSelection() {
// Parent constructor
ve.ce.LinearSelection.super.apply( this, arguments );
// Properties
// The focused node in the view when this selection was created, if one exists
this.focusedNode = this.getSurface().getFocusedNode( this.getModel().getRange() );
this.directionality = null;
};
/* Inheritance */
OO.inheritClass( ve.ce.LinearSelection, ve.ce.Selection );
/* Static Properties */
ve.ce.LinearSelection.static.name = 'linear';
/* Method */
/**
* @inheritdoc
*/
ve.ce.LinearSelection.prototype.getSelectionRects = function () {
const surface = this.getSurface();
const range = this.getModel().getRange();
const focusedNode = surface.getFocusedNode( range );
if ( focusedNode ) {
return focusedNode.getRects();
}
const nativeRange = surface.getNativeRange( range );
Iif ( !nativeRange ) {
return null;
}
let rects = [];
// Support: Firefox, IE
// Calling getClientRects sometimes fails:
// * in Firefox on page load when the address bar is still focused
// * in empty paragraphs
// * near annotation nails
try {
rects = RangeFix.getClientRects( nativeRange );
if ( !rects.length ) {
throw new Error( 'getClientRects returned empty list' );
}
} catch ( e ) {
const rect = this.getNodeClientRectFromRange( nativeRange );
Eif ( rect ) {
rects = [ rect ];
}
}
const surfaceRect = surface.getSurface().getBoundingClientRect();
Iif ( !rects || !surfaceRect ) {
return null;
}
// TODO: Use .map
const relativeRects = [];
for ( let i = 0, l = rects.length; i < l; i++ ) {
relativeRects.push( ve.translateRect( rects[ i ], -surfaceRect.left, -surfaceRect.top ) );
}
return relativeRects;
};
/**
* @inheritdoc
*/
ve.ce.LinearSelection.prototype.getSelectionStartAndEndRects = function () {
const surface = this.getSurface();
const range = this.getModel().getRange();
const focusedNode = surface.getFocusedNode( range );
if ( focusedNode ) {
return focusedNode.getStartAndEndRects();
}
return ve.getStartAndEndRects( this.getSelectionRects() );
};
/**
* @inheritdoc
*/
ve.ce.LinearSelection.prototype.getSelectionBoundingRect = function () {
const surface = this.getSurface();
const range = this.getModel().getRange();
const focusedNode = surface.getFocusedNode( range );
if ( focusedNode ) {
return focusedNode.getBoundingRect();
}
const nativeRange = surface.getNativeRange( range );
Iif ( !nativeRange ) {
return null;
}
let boundingRect;
try {
boundingRect = RangeFix.getBoundingClientRect( nativeRange );
} catch ( e ) {
boundingRect = null;
}
if ( !boundingRect ) {
boundingRect = this.getNodeClientRectFromRange( nativeRange );
}
const surfaceRect = surface.getSurface().getBoundingClientRect();
if ( !boundingRect || !surfaceRect ) {
return null;
}
return ve.translateRect( boundingRect, -surfaceRect.left, -surfaceRect.top );
};
/**
* Get a client rect from the range's end node
*
* This function is used internally by getSelectionRects and
* getSelectionBoundingRect as a fallback when Range.getClientRects
* fails. The width is hard-coded to 0 as the function is used to
* locate the selection focus position.
*
* @private
* @param {Range} range Range to get client rect for
* @return {Object|null} ClientRect-like object
*/
ve.ce.LinearSelection.prototype.getNodeClientRectFromRange = function ( range ) {
const containerNode = range.endContainer,
offset = range.endOffset;
let node;
let fixHeight;
Iif ( containerNode.nodeType === Node.TEXT_NODE && ( offset === 0 || offset === containerNode.length ) ) {
node = offset ? containerNode.previousSibling : containerNode.nextSibling;
} else if ( containerNode.nodeType === Node.ELEMENT_NODE ) {
node = offset === containerNode.childNodes.length ? containerNode.lastChild : containerNode.childNodes[ offset ];
// Nail heights are 0, so use the annotation's height
if ( node && node.nodeType === Node.ELEMENT_NODE && node.classList.contains( 've-ce-nail' ) ) {
const annotationNode = offset ? node.previousSibling : node.nextSibling;
// Sometimes annotationNode isn't an HTMLElement (T261992). Not sure
// when this happens, but we will still return a sensible rectangle
// without fixHeight isn't set.
Eif ( annotationNode instanceof HTMLElement ) {
fixHeight = annotationNode.offsetHeight;
}
}
} else {
node = containerNode;
}
while ( node && node.nodeType !== Node.ELEMENT_NODE ) {
node = node.parentNode;
}
Iif ( !node ) {
return null;
}
// When possible, pretend the cursor is the left/right border of the node
// (depending on directionality) as a fallback.
// We would use getBoundingClientRect(), but in iOS7 that's relative to the
// document rather than to the viewport
const rect = node.getClientRects()[ 0 ];
if ( !rect ) {
// FF can return null when focusNode is invisible
return null;
}
const side = $( node ).css( 'direction' ) === 'rtl' ? 'right' : 'left';
const adjacentNode = range.endContainer.childNodes[ range.endOffset ];
let x;
if ( range.collapsed && adjacentNode && adjacentNode.classList && adjacentNode.classList.contains( 've-ce-unicorn' ) ) {
// We're next to a unicorn; use its left/right position
const unicornRect = adjacentNode.getClientRects()[ 0 ];
Iif ( !unicornRect ) {
return null;
}
x = unicornRect[ side ];
} else {
x = rect[ side ];
}
if ( fixHeight ) {
// Use a pre-computed height from above, maintaining the vertical center
const middle = ( rect.top + rect.bottom ) / 2;
return {
top: middle - ( fixHeight / 2 ),
bottom: middle + ( fixHeight / 2 ),
left: x,
right: x,
width: 0,
height: fixHeight
};
} else {
return {
top: rect.top,
bottom: rect.bottom,
left: x,
right: x,
width: 0,
height: rect.height
};
}
};
/**
* @inheritdoc
*/
ve.ce.LinearSelection.prototype.getSelectionFocusRect = function () {
return !this.isNativeCursor() ?
// Don't collapse selection for focus rect if we are on a focusable node.
this.getSelectionBoundingRect() :
ve.ce.LinearSelection.super.prototype.getSelectionFocusRect.call( this );
};
/**
* @inheritdoc
*/
ve.ce.LinearSelection.prototype.isFocusedNode = function () {
return !!this.focusedNode;
};
/**
* @inheritdoc
*/
ve.ce.LinearSelection.prototype.isNativeCursor = function () {
return !this.focusedNode;
};
/**
* @inheritdoc
*/
ve.ce.LinearSelection.prototype.getDirectionality = function ( doc ) {
Eif ( !this.directionality ) {
this.directionality = doc.getDirectionalityFromRange( this.getModel().getRange() );
}
return this.directionality;
};
/* Registration */
ve.ce.selectionFactory.register( ve.ce.LinearSelection );
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