Current File : /www/varak.net/wiki.varak.net/extensions/VisualEditor/lib/ve/src/ce/ve.ce.FocusableNode.js
/*!
* VisualEditor ContentEditable FocusableNode class.
*
* @copyright 2011-2016 VisualEditor Team and others; see http://ve.mit-license.org
*/
/**
* ContentEditable focusable node.
*
* Focusable elements have a special treatment by ve.ce.Surface. When the user selects only a single
* node, if it is focusable, the surface will set the focusable node's focused state. Other systems,
* such as the context, may also use a focusable node's $focusable property as a hint of where the
* primary element in the node is. Typically, and by default, the primary element is the root
* element, but in some cases it may need to be configured to be a specific child element within the
* node's DOM rendering.
*
* If your focusable node changes size and the highlight must be redrawn, call redrawHighlights().
* 'resizeEnd' and 'rerender' are already bound to call this.
*
* @class
* @abstract
*
* @constructor
* @param {jQuery} [$focusable=this.$element] Primary element user is focusing on
* @param {Object} [config] Configuration options
* @cfg {string[]} [classes] CSS classes to be added to the highlight container
*/
ve.ce.FocusableNode = function VeCeFocusableNode( $focusable, config ) {
config = config || {};
// Properties
this.focused = false;
this.highlighted = false;
this.isFocusableSetup = false;
this.$highlights = $( '<div>' ).addClass( 've-ce-focusableNode-highlights' );
this.$focusable = $focusable || this.$element;
this.focusableSurface = null;
this.rects = null;
this.boundingRect = null;
this.startAndEndRects = null;
this.$icon = null;
this.touchMoved = false;
if ( Array.isArray( config.classes ) ) {
this.$highlights.addClass( config.classes.join( ' ' ) );
}
// DOM changes
this.$element
.addClass( 've-ce-focusableNode' )
.prop( 'contentEditable', 'false' );
// Events
this.connect( this, {
setup: 'onFocusableSetup',
teardown: 'onFocusableTeardown',
resizeStart: 'onFocusableResizeStart',
resizeEnd: 'onFocusableResizeEnd',
rerender: 'onFocusableRerender'
} );
};
/* Inheritance */
OO.initClass( ve.ce.FocusableNode );
/* Events */
/**
* @event focus
*/
/**
* @event blur
*/
/* Static properties */
/**
* Icon to use when the rendering is considered not visible, as defined in #hasRendering
*
* No icon is show if null.
*
* @static
* @property {string|null}
* @inheritable
*/
ve.ce.FocusableNode.static.iconWhenInvisible = null;
/* Methods */
/**
* Create a highlight element.
*
* @return {jQuery} A highlight element
*/
ve.ce.FocusableNode.prototype.createHighlight = function () {
var extraClasses = this.generatedContentsInvalid ? ' ve-ce-focusableNode-highlight-error' : '';
return $( '<div>' )
.addClass( 've-ce-focusableNode-highlight' + extraClasses )
.prop( {
title: this.constructor.static.getDescription( this.model ),
draggable: false
} )
.append( $( '<img>' )
.addClass( 've-ce-focusableNode-highlight-relocatable-marker' )
.attr( 'src', 'data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==' )
.on( {
mousedown: this.onFocusableMouseDown.bind( this ),
dragstart: this.onFocusableDragStart.bind( this ),
dragend: this.onFocusableDragEnd.bind( this )
} )
);
};
/**
* Handle node setup.
*
* @method
*/
ve.ce.FocusableNode.prototype.onFocusableSetup = function () {
var rAF = requestAnimationFrame || setTimeout;
// Exit if already setup or not attached
if ( this.isFocusableSetup || !this.root ) {
return;
}
this.focusableSurface = this.root.getSurface();
// DOM changes (duplicated from constructor in case this.$element is replaced)
this.$element
.addClass( 've-ce-focusableNode' )
.prop( 'contentEditable', 'false' );
// Events
this.$focusable.on( {
'mouseenter.ve-ce-focusableNode': this.onFocusableMouseEnter.bind( this ),
'touchstart.ve-ce-focusableNode': this.onFocusableTouchStart.bind( this ),
'touchmove.ve-ce-focusableNode': this.onFocusableTouchMove.bind( this ),
'mousedown.ve-ce-focusableNode touchend.ve-ce-focusableNode': this.onFocusableMouseDown.bind( this )
} );
// $element is ce=false so make sure nothing happens when you click
// on it, just in case the browser decides to do something.
// If $element == $focusable then this can be skipped as $focusable already
// handles mousedown events.
if ( !this.$element.is( this.$focusable ) ) {
this.$element.on( {
'mousedown.ve-ce-focusableNode': function ( e ) { e.preventDefault(); }
} );
}
if ( this.constructor.static.iconWhenInvisible ) {
// Set up the invisible icon, and watch for its continued necessity if
// unloaded images which don't specify their width or height are
// involved.
this.$element
.find( 'img:not([width]),img:not([height])' )
.addBack( 'img:not([width]),img:not([height])' )
.on( 'load', this.updateInvisibleIcon.bind( this ) );
rAF( this.updateInvisibleIcon.bind( this ) );
}
this.isFocusableSetup = true;
};
/**
* Update the state of icon if this node is invisible
*
* If the node doesn't have a visible rendering, we insert an icon to represent
* it. If the icon was already present, and this is called again when rendering
* has developed, we remove the icon.
*
* @method
*/
ve.ce.FocusableNode.prototype.updateInvisibleIcon = function () {
if ( !this.constructor.static.iconWhenInvisible ) {
return;
}
if ( !this.hasRendering() ) {
if ( !this.$icon ) {
this.$icon = this.createInvisibleIcon();
}
this.$element.first()
.addClass( 've-ce-focusableNode-invisible' )
.prepend( this.$icon );
} else if ( this.$icon ) {
this.$element.first().removeClass( 've-ce-focusableNode-invisible' );
this.$icon.detach();
}
};
/**
* Create a element to show if the node is invisible
*
* @return {jQuery} Element to show
*/
ve.ce.FocusableNode.prototype.createInvisibleIcon = function () {
var icon = new OO.ui.IconWidget( {
classes: [ 've-ce-focusableNode-invisibleIcon' ],
icon: this.constructor.static.iconWhenInvisible
} );
// Add em space for selection highlighting
icon.$element.text( '\u2003' );
return icon.$element;
};
/**
* Handle node teardown.
*
* @method
*/
ve.ce.FocusableNode.prototype.onFocusableTeardown = function () {
// Exit if not setup or not attached
if ( !this.isFocusableSetup || !this.root ) {
return;
}
// Events
this.$focusable.off( '.ve-ce-focusableNode' );
this.$element.off( '.ve-ce-focusableNode' );
// Highlights
this.clearHighlights();
// DOM changes
this.$element
.removeClass( 've-ce-focusableNode' )
.removeProp( 'contentEditable' );
this.focusableSurface = null;
this.isFocusableSetup = false;
};
/**
* Handle highlight mouse down events.
*
* @method
* @param {jQuery.Event} e Mouse down event
*/
ve.ce.FocusableNode.prototype.onFocusableMouseDown = function ( e ) {
var range,
node = this,
surfaceModel = this.focusableSurface.getModel(),
selection = surfaceModel.getSelection(),
nodeRange = this.model.getOuterRange();
if ( e.type === 'touchend' && this.touchMoved ) {
return;
}
if ( !this.isInContentEditable() ) {
return;
}
if ( e.which === OO.ui.MouseButtons.RIGHT ) {
// Hide images, and select spans so context menu shows 'copy', but not 'copy image'
this.$highlights.addClass( 've-ce-focusableNode-highlights-contextOpen' );
// Make ce=true so we get cut/paste options in context menu
this.$highlights.prop( 'contentEditable', 'true' );
ve.selectElement( this.$highlights[ 0 ] );
setTimeout( function () {
// Undo everything as soon as the context menu is show
node.$highlights.removeClass( 've-ce-focusableNode-highlights-contextOpen' );
node.$highlights.prop( 'contentEditable', 'true' );
node.focusableSurface.preparePasteTargetForCopy();
} );
}
// Wait for native selection to change before correcting
setTimeout( function () {
range = selection instanceof ve.dm.LinearSelection && selection.getRange();
surfaceModel.getLinearFragment(
e.shiftKey && range ?
ve.Range.static.newCoveringRange(
[ range, nodeRange ], range.from > nodeRange.from
) :
nodeRange
).select();
node.focusableSurface.updateActiveLink();
} );
};
/**
* Handle highlight double click events.
*
* @method
* @param {jQuery.Event} e Double click event
*/
ve.ce.FocusableNode.prototype.onFocusableDblClick = function () {
if ( !this.isInContentEditable() ) {
return;
}
this.executeCommand();
};
/**
* Execute the command associated with this node.
*
* @method
*/
ve.ce.FocusableNode.prototype.executeCommand = function () {
var command, surface;
if ( !this.model.isInspectable() ) {
return false;
}
surface = this.focusableSurface.getSurface();
command = surface.commandRegistry.getCommandForNode( this );
if ( command ) {
command.execute( surface );
}
};
/**
* Handle element drag start.
*
* @method
* @param {jQuery.Event} e Drag start event
*/
ve.ce.FocusableNode.prototype.onFocusableDragStart = function () {
if ( this.focusableSurface ) {
// Allow dragging this node in the surface
this.focusableSurface.startRelocation( this );
}
this.$highlights.addClass( 've-ce-focusableNode-highlights-relocating' );
};
/**
* Handle element drag end.
*
* If a relocation actually takes place the node is destroyed before this events fires.
*
* @method
* @param {jQuery.Event} e Drag end event
*/
ve.ce.FocusableNode.prototype.onFocusableDragEnd = function () {
// endRelocation is usually triggered by onDocumentDrop in the surface, but if it isn't
// trigger it here instead
if ( this.focusableSurface ) {
this.focusableSurface.endRelocation();
}
this.$highlights.removeClass( 've-ce-focusableNode-highlights-relocating' );
};
/**
* Handle mouse enter events.
*
* @method
* @param {jQuery.Event} e Mouse enter event
*/
ve.ce.FocusableNode.prototype.onFocusableMouseEnter = function () {
if ( !this.root.getSurface().dragging && !this.root.getSurface().resizing && this.isInContentEditable() ) {
this.createHighlights();
}
};
/**
* Handle touch start events.
*
* @method
* @param {jQuery.Event} e Touch start event
*/
ve.ce.FocusableNode.prototype.onFocusableTouchStart = function () {
this.touchMoved = false;
};
/**
* Handle touch move events.
*
* @method
* @param {jQuery.Event} e Touch move event
*/
ve.ce.FocusableNode.prototype.onFocusableTouchMove = function () {
this.touchMoved = true;
};
/**
* Handle surface mouse move events.
*
* @method
* @param {jQuery.Event} e Mouse move event
*/
ve.ce.FocusableNode.prototype.onSurfaceMouseMove = function ( e ) {
var $target = $( e.target );
if (
!$target.hasClass( 've-ce-focusableNode-highlight' ) &&
!OO.ui.contains( this.$focusable.toArray(), $target[ 0 ], true )
) {
this.clearHighlights();
}
};
/**
* Handle surface mouse leave events.
*
* @method
* @param {jQuery.Event} e Mouse leave event
*/
ve.ce.FocusableNode.prototype.onSurfaceMouseLeave = function ( e ) {
if ( e.relatedTarget === null ) {
this.clearHighlights();
}
};
/**
* Handle resize start events.
*
* @method
*/
ve.ce.FocusableNode.prototype.onFocusableResizeStart = function () {
this.clearHighlights();
};
/**
* Handle resize end event.
*
* @method
*/
ve.ce.FocusableNode.prototype.onFocusableResizeEnd = function () {
this.redrawHighlights();
};
/**
* Handle rerender event.
*
* @method
*/
ve.ce.FocusableNode.prototype.onFocusableRerender = function () {
if ( this.focused && this.focusableSurface ) {
this.redrawHighlights();
// reposition menu
this.focusableSurface.getSurface().getContext().updateDimensions( true );
}
};
/**
* Check if node is focused.
*
* @method
* @return {boolean} Node is focused
*/
ve.ce.FocusableNode.prototype.isFocused = function () {
return this.focused;
};
/**
* Set the selected state of the node.
*
* @method
* @param {boolean} value Node is focused
* @fires focus
* @fires blur
*/
ve.ce.FocusableNode.prototype.setFocused = function ( value ) {
value = !!value;
if ( this.focused !== value ) {
this.focused = value;
if ( this.focused ) {
this.emit( 'focus' );
this.$element.addClass( 've-ce-focusableNode-focused' );
this.createHighlights();
this.focusableSurface.appendHighlights( this.$highlights, this.focused );
this.focusableSurface.$element.off( '.ve-ce-focusableNode' );
this.focusableSurface.connect( this, { position: 'positionHighlights' } );
} else {
this.emit( 'blur' );
this.$element.removeClass( 've-ce-focusableNode-focused' );
this.clearHighlights();
}
}
};
/**
* Creates highlights.
*
* @method
*/
ve.ce.FocusableNode.prototype.createHighlights = function () {
if ( this.highlighted ) {
return;
}
this.$highlights.on( {
mousedown: this.onFocusableMouseDown.bind( this ),
dblclick: this.onFocusableDblClick.bind( this )
} );
this.highlighted = true;
this.positionHighlights();
this.focusableSurface.appendHighlights( this.$highlights, this.focused );
// Events
if ( !this.focused ) {
this.focusableSurface.$element.on( {
'mousemove.ve-ce-focusableNode': this.onSurfaceMouseMove.bind( this ),
'mouseleave.ve-ce-focusableNode': this.onSurfaceMouseLeave.bind( this )
} );
}
};
/**
* Clears highlight.
*
* @method
*/
ve.ce.FocusableNode.prototype.clearHighlights = function () {
if ( !this.highlighted ) {
return;
}
this.$highlights.remove().empty();
this.focusableSurface.$element.off( '.ve-ce-focusableNode' );
this.focusableSurface.disconnect( this, { position: 'positionHighlights' } );
this.highlighted = false;
this.boundingRect = null;
};
/**
* Redraws highlight.
*
* @method
*/
ve.ce.FocusableNode.prototype.redrawHighlights = function () {
this.clearHighlights();
this.createHighlights();
};
/**
* Calculate position of highlights
*/
ve.ce.FocusableNode.prototype.calculateHighlights = function () {
var i, l, $set, columnCount, columnWidth, surfaceOffset,
rects = [],
filteredRects = [],
webkitColumns = 'webkitColumnCount' in document.createElement( 'div' ).style;
// Protect against calling before/after surface setup/teardown
if ( !this.focusableSurface ) {
this.boundingRect = null;
this.startAndEndRects = null;
this.rects = [];
return;
}
surfaceOffset = this.focusableSurface.getSurface().getBoundingClientRect();
function contains( rect1, rect2 ) {
return rect2.left >= rect1.left &&
rect2.top >= rect1.top &&
rect2.right <= rect1.right &&
rect2.bottom <= rect1.bottom;
}
function process( el ) {
var i, j, il, jl, contained, clientRects, overflow, $el;
if ( el.classList.contains( 've-ce-noHighlight' ) ) {
return;
}
$el = $( el );
if ( webkitColumns ) {
columnCount = $el.css( '-webkit-column-count' );
columnWidth = $el.css( '-webkit-column-width' );
if ( ( columnCount && columnCount !== 'auto' ) || ( columnWidth && columnWidth !== 'auto' ) ) {
// Support: Chrome
// Chrome incorrectly measures children of nodes with columns [1], let's
// just ignore them rather than render a possibly bizarre highlight. They
// will usually not be positioned, because Chrome also doesn't position
// them correctly [2] and so people avoid doing it.
//
// Of course there are other ways to render a node outside the bounding
// box of its parent, like negative margin. We do not handle these cases,
// and the highlight may not correctly cover the entire node if that
// happens. This can't be worked around without implementing CSS
// layouting logic ourselves, which is not worth it.
//
// [1] https://code.google.com/p/chromium/issues/detail?id=391271
// [2] https://code.google.com/p/chromium/issues/detail?id=291616
// jQuery keeps nodes in its collections in document order, so the
// children have not been processed yet and can be safely removed.
$set = $set.not( $el.find( '*' ) );
}
}
// Don't descend if overflow is anything but visible as this prevents
// child elements appearing beyond the bounding box of the parent
overflow = $el.css( 'overflow' );
if ( overflow && overflow !== 'visible' ) {
$set = $set.not( $el.find( '*' ) );
}
clientRects = el.getClientRects();
for ( i = 0, il = clientRects.length; i < il; i++ ) {
contained = false;
for ( j = 0, jl = rects.length; j < jl; j++ ) {
// This rect is contained by an existing rect, discard
if ( contains( rects[ j ], clientRects[ i ] ) ) {
contained = true;
break;
}
// An existing rect is contained by this rect, discard the existing rect
if ( contains( clientRects[ i ], rects[ j ] ) ) {
rects.splice( j, 1 );
j--;
jl--;
}
}
if ( !contained ) {
rects.push( clientRects[ i ] );
}
}
}
$set = this.$focusable.find( '*' ).addBack();
// Calling process() may change $set.length
for ( i = 0; i < $set.length; i++ ) {
process( $set[ i ] );
}
// Elements with a width/height of 0 return a clientRect with a width/height of 1
// As elements with an actual width/height of 1 aren't that useful anyway, just
// throw away anything that is <=1
filteredRects = rects.filter( function ( rect ) {
return rect.width > 1 && rect.height > 1;
} );
// But if this filtering doesn't leave any rects at all, then we do want to use the 1px rects
if ( filteredRects.length > 0 ) {
rects = filteredRects;
}
this.boundingRect = null;
// startAndEndRects is lazily evaluated in getStartAndEndRects from rects
this.startAndEndRects = null;
for ( i = 0, l = rects.length; i < l; i++ ) {
// Translate to relative
rects[ i ] = ve.translateRect( rects[ i ], -surfaceOffset.left, -surfaceOffset.top );
this.$highlights.append(
this.createHighlight().css( {
top: rects[ i ].top,
left: rects[ i ].left,
width: rects[ i ].width,
height: rects[ i ].height
} )
);
if ( !this.boundingRect ) {
this.boundingRect = ve.copy( rects[ i ] );
} else {
this.boundingRect.top = Math.min( this.boundingRect.top, rects[ i ].top );
this.boundingRect.left = Math.min( this.boundingRect.left, rects[ i ].left );
this.boundingRect.bottom = Math.max( this.boundingRect.bottom, rects[ i ].bottom );
this.boundingRect.right = Math.max( this.boundingRect.right, rects[ i ].right );
}
}
if ( this.boundingRect ) {
this.boundingRect.width = this.boundingRect.right - this.boundingRect.left;
this.boundingRect.height = this.boundingRect.bottom - this.boundingRect.top;
}
this.rects = rects;
};
/**
* Positions highlights, and remove collapsed ones
*
* @method
*/
ve.ce.FocusableNode.prototype.positionHighlights = function () {
var i, l;
if ( !this.highlighted ) {
return;
}
this.calculateHighlights();
this.$highlights.empty()
// Append something selectable for right-click copy
.append( $( '<span>' ).addClass( 've-ce-focusableNode-highlight-selectable' ).html( ' ' ) );
for ( i = 0, l = this.rects.length; i < l; i++ ) {
this.$highlights.append(
this.createHighlight().css( {
top: this.rects[ i ].top,
left: this.rects[ i ].left,
width: this.rects[ i ].width,
height: this.rects[ i ].height
} )
);
}
};
/**
* Get list of rectangles outlining the shape of the node relative to the surface
*
* @return {Object[]} List of rectangle objects
*/
ve.ce.FocusableNode.prototype.getRects = function () {
if ( !this.highlighted ) {
this.calculateHighlights();
}
return this.rects;
};
/**
* Get the bounding rectangle of the focusable node highlight relative to the surface
*
* @return {Object|null} Top, left, bottom & right positions of the focusable node relative to the surface
*/
ve.ce.FocusableNode.prototype.getBoundingRect = function () {
if ( !this.highlighted ) {
this.calculateHighlights();
}
return this.boundingRect;
};
/**
* Get start and end rectangles of an inline focusable node relative to the surface
*
* @return {Object|null} Start and end rectangles
*/
ve.ce.FocusableNode.prototype.getStartAndEndRects = function () {
if ( !this.highlighted ) {
this.calculateHighlights();
}
if ( !this.startAndEndRects ) {
this.startAndEndRects = ve.getStartAndEndRects( this.rects );
}
return this.startAndEndRects;
};
/**
* Check if the rendering is visible
*
* "Visible", in this case, is defined as any of:
* * contains any non-whitespace text
* * is greater than 8px x 8px in dimensions
*
* @return {boolean} The node has a visible rendering
*/
ve.ce.FocusableNode.prototype.hasRendering = function () {
var visible = false;
if ( this.$element.text().trim() !== '' ) {
return true;
}
this.$element.each( function () {
var $this = $( this );
if (
( $this.width() >= 8 && $this.height() >= 8 ) ||
// jQuery handles disparate cases, but is prone to elements which
// haven't experienced layout yet having 0 width / height. So,
// check the raw DOM width / height properties as well. If it's an
// image or other thing-with-width, this will work slightly more
// reliably. If it's not, this will be undefined and the
// comparison will thus just be false.
( this.width >= 8 && this.height >= 8 )
) {
visible = true;
return false;
}
} );
return visible;
};
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