mediawiki-extensions-Visual.../modules/ve/ce/ve.ce.Surface.js

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/*!
* VisualEditor ContentEditable Surface class.
*
* @copyright 2011-2013 VisualEditor Team and others; see AUTHORS.txt
* @license The MIT License (MIT); see LICENSE.txt
*/
/*global rangy */
/**
* ContentEditable surface.
*
* @class
* @extends ve.Element
* @mixins ve.EventEmitter
*
* @constructor
* @param {jQuery} $container
* @param {ve.dm.Surface} model Surface model to observe
* @param {ve.ui.Surface} surface Surface user interface
* @param {Object} [config] Config options
*/
ve.ce.Surface = function VeCeSurface( model, surface, options ) {
// Parent constructor
ve.Element.call( this, options );
// Mixin constructors
ve.EventEmitter.call( this );
// Properties
this.surface = surface;
this.inIme = false;
this.model = model;
this.documentView = new ve.ce.Document( model.getDocument(), this );
this.surfaceObserver = new ve.ce.SurfaceObserver( this.documentView );
this.selectionTimeout = null;
this.$document = $( this.getElementDocument() );
this.clipboard = {};
this.renderingEnabled = true;
this.dragging = false;
this.relocating = false;
this.selecting = false;
this.$phantoms = this.$$( '<div>' );
this.$highlights = this.$$( '<div>' );
this.$pasteTarget = this.$$( '<div>' );
this.pasting = false;
this.clickHistory = [];
this.focusedNode = null;
// Events
this.surfaceObserver.connect(
this, { 'contentChange': 'onContentChange', 'selectionChange': 'onSelectionChange' }
);
this.model.connect( this, { 'change': 'onChange', 'lock': 'onLock', 'unlock': 'onUnlock' } );
var $documentNode = this.documentView.getDocumentNode().$;
$documentNode.on( {
'focus': ve.bind( this.documentOnFocus, this ),
'blur': ve.bind( this.documentOnBlur, this )
} );
$documentNode.on( 'focus', 'a', function () {
// Opera triggers 'blur' on document node before any link is
// focused and we don't want that
$documentNode[0].focus();
} );
this.$.on( {
'cut': ve.bind( this.onCut, this ),
'copy': ve.bind( this.onCopy, this ),
'paste': ve.bind( this.onPaste, this ),
'dragover': ve.bind( this.onDocumentDragOver, this ),
'drop': ve.bind( this.onDocumentDrop, this )
} );
if ( $.browser.msie ) {
this.$.on( 'beforepaste', ve.bind( this.onPaste, this ) );
}
// Initialization
this.$.addClass( 've-ce-surface' );
this.$phantoms.addClass( 've-ce-surface-phantoms' );
this.$highlights.addClass( 've-ce-surface-highlights' );
this.$pasteTarget.addClass( 've-ce-surface-paste' ).prop( 'contenteditable', true );
// Add elements to the DOM
this.$.append( this.documentView.getDocumentNode().$, this.$pasteTarget );
this.surface.$localOverlayBlockers.append( this.$phantoms, this.$highlights );
};
/* Inheritance */
ve.inheritClass( ve.ce.Surface, ve.Element );
ve.mixinClass( ve.ce.Surface, ve.EventEmitter );
/* Events */
/**
* @event selectionStart
*/
/**
* @event selectionEnd
*/
/**
* @event relocationStart
*/
/**
* @event relocationEnd
*/
/* Static Properties */
/**
* Pattern matching "normal" characters which we can let the browser handle natively.
*
* @static
* @property {RegExp}
*/
ve.ce.Surface.static.textPattern = new RegExp(
'[a-zA-Z\\-_\'ÆÐƎƏƐƔIJŊŒẞÞǷȜæðǝəɛɣijŋœĸſßþƿȝĄƁÇĐƊĘĦĮƘŁØƠŞȘŢȚŦŲƯY̨Ƴąɓçđɗęħįƙłøơşșţțŧųưy̨ƴÁÀÂÄ' +
'ǍĂĀÃÅǺĄÆǼǢƁĆĊĈČÇĎḌĐƊÐÉÈĖÊËĚĔĒĘẸƎƏƐĠĜǦĞĢƔáàâäǎăāãåǻąæǽǣɓćċĉčçďḍđɗðéèėêëěĕēęẹǝəɛġĝǧğģɣĤḤĦIÍÌİ' +
'ÎÏǏĬĪĨĮỊIJĴĶƘĹĻŁĽĿʼNŃN̈ŇÑŅŊÓÒÔÖǑŎŌÕŐỌØǾƠŒĥḥħıíìiîïǐĭīĩįịijĵķƙĸĺļłľŀʼnńn̈ňñņŋóòôöǒŏōõőọøǿơœŔŘŖŚŜ' +
'ŠŞȘṢẞŤŢṬŦÞÚÙÛÜǓŬŪŨŰŮŲỤƯẂẀŴẄǷÝỲŶŸȲỸƳŹŻŽẒŕřŗſśŝšşșṣßťţṭŧþúùûüǔŭūũűůųụưẃẁŵẅƿýỳŷÿȳỹƴźżžẓ]',
'g'
);
/* Methods */
/**
* Get the coordinates of the selection anchor.
*
* @method
*/
ve.ce.Surface.prototype.getSelectionRect = function () {
var sel, rect, $span, lineHeight, startRange, startOffset, endRange, endOffset, focusedOffset;
if ( this.focusedNode ) {
focusedOffset = this.focusedNode.$.offset();
return {
'start': {
'x': focusedOffset.left,
'y': focusedOffset.top
},
'end': {
'x': focusedOffset.left + this.focusedNode.$.width(),
'y': focusedOffset.top + this.focusedNode.$.height()
}
};
}
if ( !rangy.initialized ) {
rangy.init();
}
sel = rangy.getSelection( this.getElementDocument() );
// We can't do anything if there's no selection
if ( sel.rangeCount === 0 ) {
return null;
}
rect = sel.getBoundingDocumentRect();
// Sometimes the selection will have invalid bounding rect information, which presents as all
// rectangle dimensions being 0 which causes #getStartDocumentPos and #getEndDocumentPos to
// throw exceptions
if ( rect.top === 0 || rect.bottom === 0 || rect.left === 0 || rect.right === 0 ) {
// Calculate starting range position
startRange = sel.getRangeAt( 0 );
$span = $( '<span>|</span>', startRange.startContainer.ownerDocument );
startRange.insertNode( $span[0] );
startOffset = $span.offset();
$span.detach();
// Calculate ending range position
endRange = startRange.cloneRange();
endRange.collapse( false );
endRange.insertNode( $span[0] );
endOffset = $span.offset();
lineHeight = $span.height();
$span.detach();
// Restore the selection
startRange.refresh();
// Return the selection bounding rectangle
return {
'start': {
'x': startOffset.left,
'y': startOffset.top
},
'end': {
'x': endOffset.left,
// Adjust the vertical position by the line-height to get the bottom dimension
'y': endOffset.top + lineHeight
}
};
} else {
return {
'start': sel.getStartDocumentPos(),
'end': sel.getEndDocumentPos()
};
}
};
/*! Initialization */
/**
* Initialize surface.
*
* This should be called after the surface has been attached to the DOM.
*
* @method
*/
ve.ce.Surface.prototype.initialize = function () {
if ( !rangy.initialized ) {
rangy.init();
}
this.documentView.getDocumentNode().setLive( true );
// Turn off native object editing. This must be tried after the surface has been added to DOM.
try {
this.$document[0].execCommand( 'enableObjectResizing', false, false );
this.$document[0].execCommand( 'enableInlineTableEditing', false, false );
} catch ( e ) { /* Silently ignore */ }
};
/**
* Enable editing.
*
* @method
*/
ve.ce.Surface.prototype.enable = function () {
this.documentView.getDocumentNode().enable();
};
/**
* Disable editing.
*
* @method
*/
ve.ce.Surface.prototype.disable = function () {
this.documentView.getDocumentNode().disable();
};
/**
* Destroy the surface, removing all DOM elements.
*
* @method
* @returns {ve.ui.Context} Context user interface
*/
ve.ce.Surface.prototype.destroy = function () {
this.documentView.getDocumentNode().setLive( false );
this.$.remove();
this.$phantoms.remove();
};
/**
* Give focus to the surface, preserving the previous selection.
*
* This is used when switching between surfaces, e.g. when closing a dialog window.
*/
ve.ce.Surface.prototype.focus = function () {
var $document = this.documentView.getDocumentNode().$,
$window = $( ve.Element.getWindow( $document ) ),
scrollTop = $window.scrollTop();
$document[0].focus();
// Calling focus sets the cursor to zero offset, so we need to restore scrollTop
$window.scrollTop( scrollTop );
this.focusedNode = null;
this.onChange( null, this.surface.getModel().selection );
};
/*! Native Browser Events */
/**
* Handle document focus events.
*
* @method
* @param {jQuery.Event} e Focus event
*/
ve.ce.Surface.prototype.documentOnFocus = function () {
this.$document.off( '.ve-ce-Surface' );
this.$document.on( {
'keydown.ve-ce-Surface': ve.bind( this.onDocumentKeyDown, this ),
'keyup.ve-ce-Surface': ve.bind( this.onDocumentKeyUp, this ),
'keypress.ve-ce-Surface': ve.bind( this.onDocumentKeyPress, this ),
'mousedown.ve-ce-Surface': ve.bind( this.onDocumentMouseDown, this ),
'mouseup.ve-ce-Surface': ve.bind( this.onDocumentMouseUp, this ),
'mousemove.ve-ce-Surface': ve.bind( this.onDocumentMouseMove, this ),
'compositionstart.ve-ce-Surface': ve.bind( this.onDocumentCompositionStart, this ),
'compositionend.ve-ce-Surface': ve.bind( this.onDocumentCompositionEnd, this )
} );
this.surfaceObserver.start( true );
};
/**
* Handle document blur events.
*
* @method
* @param {jQuery.Event} e Element blur event
*/
ve.ce.Surface.prototype.documentOnBlur = function () {
this.$document.off( '.ve-ce-Surface' );
this.surfaceObserver.stop( true );
this.dragging = false;
};
/**
* Handle document mouse down events.
*
* @method
* @param {jQuery.Event} e Mouse down event
*/
ve.ce.Surface.prototype.onDocumentMouseDown = function ( e ) {
var selection, node;
// Remember the mouse is down
this.dragging = true;
// Old code to figure out if user clicked inside the document or not - leave it here for now
// this.$$( e.target ).closest( '.ve-ce-documentNode' ).length === 0
if ( e.which === 1 ) {
this.surfaceObserver.stop( true );
}
// Handle triple click
if ( this.getClickCount( e.originalEvent ) >= 3 ) {
// Browser default behaviour for triple click won't behave as we want
e.preventDefault();
selection = this.model.getSelection();
node = this.documentView.getDocumentNode().getNodeFromOffset( selection.start );
// Find the nearest non-content node
while ( node.parent !== null && node.model.isContent() ) {
node = node.parent;
}
this.model.change( null, node.model.getRange() );
}
};
/**
* Handle document mouse up events.
*
* @method
* @param {jQuery.Event} e Mouse up event
* @emits selectionEnd
*/
ve.ce.Surface.prototype.onDocumentMouseUp = function ( e ) {
this.surfaceObserver.start();
if ( !e.shiftKey && this.selecting ) {
this.emit( 'selectionEnd' );
this.selecting = false;
}
this.dragging = false;
};
/**
* Handle document mouse move events.
*
* @method
* @param {jQuery.Event} e Mouse move event
* @emits selectionStart
*/
ve.ce.Surface.prototype.onDocumentMouseMove = function () {
// Detect beginning of selection by moving mouse while dragging
if ( this.dragging && !this.selecting ) {
this.selecting = true;
this.emit( 'selectionStart' );
}
};
/**
* Handle document dragover events.
*
* Limits native drag and drop behavior.
*
* @method
* @param {jQuery.Event} e Drag over event
*/
ve.ce.Surface.prototype.onDocumentDragOver = function () {
if ( !this.relocating ) {
return false;
} else if ( this.selecting ) {
this.emit( 'selectionEnd' );
this.selecting = false;
this.dragging = false;
}
};
/**
* Handle document drop events.
*
* Limits native drag and drop behavior.
*
* TODO: Look into using drag and drop data transfer to embed the dragged element's original range
* (for dragging within one document) and serialized linear model data (for dragging between
* multiple documents) and use a special mimetype, like application-x/VisualEditor, to allow
* dragover and drop events on the surface, removing the need to give the surface explicit
* instructions to allow and prevent dragging and dropping a certain node.
*
* @method
* @param {jQuery.Event} e Drag drop event
*/
ve.ce.Surface.prototype.onDocumentDrop = function ( e ) {
var node = this.relocating;
if ( node ) {
// Process drop operation after native drop has been prevented below
setTimeout( ve.bind( function () {
var dropPoint, nodeData, originFragment, targetFragment,
nodeRange = node.getModel().getOuterRange();
// Get a fragment from the drop point
dropPoint = rangy.positionFromPoint(
e.originalEvent.pageX - this.$document.scrollLeft(),
e.originalEvent.pageY - this.$document.scrollTop()
);
if ( !dropPoint ) {
// Getting position from point supported
return false;
}
targetFragment = this.model.getFragment(
new ve.Range( ve.ce.getOffset( dropPoint.node, dropPoint.offset ) ), false
);
// Get a fragment and data of the node being dragged
originFragment = this.model.getFragment( nodeRange, false );
nodeData = originFragment.getData();
// Remove node from old location (auto-updates targetFragment's range)
originFragment.removeContent();
// Re-insert node at new location and re-select it
targetFragment.insertContent( nodeData ).select();
}, this ) );
}
return false;
};
/**
* Handle document key down events.
*
* @method
* @param {jQuery.Event} e Key down event
* @emits selectionStart
*/
ve.ce.Surface.prototype.onDocumentKeyDown = function ( e ) {
var trigger;
// Ignore keydowns while in IME mode but do not preventDefault them (so text actually appear on
// the screen).
if ( this.inIme === true ) {
return;
}
// When entering IME mode IE first keydown (e.which = 229) before it fires compositionstart, so
// IME detection have to happen here instead of onDocumentCompositionStart.
// TODO: This code and code in onDocumentCompositionStart are very similar, consider moving them
// to one method.
if ( $.browser.msie === true && e.which === 229 ) {
this.inIme = true;
this.handleInsertion();
return;
}
this.surfaceObserver.stop( true );
switch ( e.keyCode ) {
case ve.Keys.LEFT:
case ve.Keys.RIGHT:
case ve.Keys.UP:
case ve.Keys.DOWN:
if ( !this.dragging && !this.selecting && e.shiftKey ) {
this.selecting = true;
this.emit( 'selectionStart' );
}
if ( ve.ce.isLeftOrRightArrowKey( e.keyCode ) ) {
this.handleLeftOrRightArrowKey( e );
} else {
this.handleUpOrDownArrowKey( e );
}
break;
case ve.Keys.ENTER:
e.preventDefault();
this.handleEnter( e );
break;
case ve.Keys.BACKSPACE:
e.preventDefault();
this.handleDelete( e, true );
break;
case ve.Keys.DELETE:
e.preventDefault();
this.handleDelete( e, false );
break;
default:
trigger = new ve.ui.Trigger( e );
if ( trigger.isComplete() && this.surface.execute( trigger ) ) {
e.preventDefault();
}
break;
}
this.surfaceObserver.start();
};
/**
* Handle document key press events.
*
* @method
* @param {jQuery.Event} e Key press event
*/
ve.ce.Surface.prototype.onDocumentKeyPress = function ( e ) {
var selection, prevNode, documentModel = this.model.getDocument();
// Prevent IE from editing Aliens/Entities
// TODO: Better comment about what's going on here is needed.
if ( $.browser.msie === true ) {
selection = this.model.getSelection();
if ( selection.start !== 0 && selection.isCollapsed() ) {
prevNode = documentModel.getDocumentNode().getNodeFromOffset( selection.start - 1 );
if (
!this.documentView.getSlugAtOffset( selection.start ) &&
prevNode.isContent() &&
documentModel.data.isCloseElementData( selection.start - 1 )
) {
this.model.change( null, new ve.Range( selection.start ) );
}
}
}
// Filter out non-character keys. If those keys wouldn't be filtered out unexpected content
// deletion would occur in case when selection is not collapsed and user press home key for
// instance (Firefox fires keypress for home key).
// TODO: Should be covered with Selenium tests.
if ( e.which === 0 || e.charCode === 0 || ve.ce.isShortcutKey( e ) ) {
return;
}
this.handleInsertion();
setTimeout( ve.bind( function () {
this.surfaceObserver.start();
}, this ) );
};
/**
* Handle document key up events.
*
* @method
* @param {jQuery.Event} e Key up event
* @emits selectionEnd
*/
ve.ce.Surface.prototype.onDocumentKeyUp = function ( e ) {
// Detect end of selecting by letting go of shift
if ( !this.dragging && this.selecting && e.keyCode === ve.Keys.SHIFT ) {
this.selecting = false;
this.emit( 'selectionEnd' );
}
};
/**
* Handle cut events.
*
* @method
* @param {jQuery.Event} e Cut event
*/
ve.ce.Surface.prototype.onCut = function ( e ) {
this.surfaceObserver.stop();
this.onCopy( e );
setTimeout( ve.bind( function () {
var selection, tx;
// We don't like how browsers cut, so let's undo it and do it ourselves.
this.$document[0].execCommand( 'undo', false, false );
selection = this.model.getSelection();
// Transact
tx = ve.dm.Transaction.newFromRemoval( this.documentView.model, selection );
this.model.change( tx, new ve.Range( selection.start ) );
this.surfaceObserver.clear();
this.surfaceObserver.start();
}, this ) );
};
/**
* Handle copy events.
*
* @method
* @param {jQuery.Event} e Copy event
*/
ve.ce.Surface.prototype.onCopy = function () {
var sel = rangy.getSelection( this.$document[0] ),
$frag = this.$$( sel.getRangeAt(0).cloneContents() ),
slice = this.documentView.model.getSlice( this.model.getSelection() ),
key = '';
// CLone the elements in the slice
slice.cloneElements();
// Create key from text and element names
$frag.contents().each( function () {
key += this.textContent || this.nodeName;
} );
key = 've-' + key.replace( /\s/gm, '' );
// Set clipboard
this.clipboard[key] = slice;
};
/**
* Handle paste events.
*
* @method
* @param {jQuery.Event} e Paste event
*/
ve.ce.Surface.prototype.onPaste = function () {
// Prevent pasting until after we are done
if ( this.pasting ) {
return false;
}
this.pasting = true;
var tx, scrollTop,
$window = $( ve.Element.getWindow( this.$$.context ) ),
view = this,
selection = this.model.getSelection();
this.surfaceObserver.stop();
// Pasting into a range? Remove first.
if ( !rangy.getSelection( this.$document[0] ).isCollapsed ) {
tx = ve.dm.Transaction.newFromRemoval( view.documentView.model, selection );
selection = tx.translateRange( selection );
view.model.change( tx, selection );
}
// Save scroll position and change focus to "offscreen" paste target
scrollTop = $window.scrollTop();
this.$pasteTarget.html( '' ).show().focus();
setTimeout( ve.bind( function () {
var pasteData, slice, tx,
key = '';
// Create key from text and element names
view.$pasteTarget.hide().contents().each( function () {
key += this.textContent || this.nodeName;
} );
key = 've-' + key.replace( /\s/gm, '' );
// Get linear model from clipboard or create array from unknown pasted content
if ( view.clipboard[key] ) {
slice = view.clipboard[key];
} else {
slice = new ve.dm.DocumentSlice(
ve.splitClusters(
view.$pasteTarget.text().replace( /\n/gm, '' )
)
);
}
pasteData = slice.getBalancedData();
// Annotate
ve.dm.Document.addAnnotationsToData( pasteData, this.model.getInsertionAnnotations() );
// Transaction
tx = ve.dm.Transaction.newFromInsertion(
view.documentView.model,
selection.start,
pasteData
);
// Restore focus and scroll position
view.documentView.documentNode.$.focus();
$window.scrollTop( scrollTop );
selection = tx.translateRange( selection );
view.model.change( tx, new ve.Range( selection.start ) );
// Move cursor to end of selection
view.model.change( null, new ve.Range( selection.end ) );
// Allow pasting again
view.pasting = false;
}, this ) );
};
/**
* Handle document composition start events.
*
* @method
* @param {jQuery.Event} e Composition start event
*/
ve.ce.Surface.prototype.onDocumentCompositionStart = function () {
if ( $.browser.msie === true ) {
return;
}
this.inIme = true;
this.handleInsertion();
};
/**
* Handle document composition end events.
*
* @method
* @param {jQuery.Event} e Composition end event
*/
ve.ce.Surface.prototype.onDocumentCompositionEnd = function () {
this.inIme = false;
this.surfaceObserver.start();
};
/*! Custom Events */
/**
* Handle change events.
*
* @see ve.dm.Surface#method-change
*
* @method
* @param {ve.dm.Transaction|null} transaction
* @param {ve.Range|undefined} selection
*/
ve.ce.Surface.prototype.onChange = function ( transaction, selection ) {
var start, end,
next = null,
previous = this.focusedNode;
if ( selection ) {
// Detect when only a single inline element is selected
if ( !selection.isCollapsed() ) {
start = this.documentView.getDocumentNode().getNodeFromOffset( selection.start + 1 );
if ( ve.isMixedIn( start, ve.ce.FocusableNode ) ) {
end = this.documentView.getDocumentNode().getNodeFromOffset( selection.end - 1 );
if ( start === end ) {
next = start;
}
}
}
// Update nodes if something changed
if ( previous !== next ) {
if ( previous ) {
previous.setFocused( false );
this.focusedNode = null;
}
if ( next ) {
next.setFocused( true );
this.focusedNode = start;
rangy.getSelection( this.getElementDocument() ).removeAllRanges();
}
}
// If there is no focused node, use native selection
if ( !this.focusedNode && this.isRenderingEnabled() ) {
this.showSelection( selection );
}
}
};
/**
* Handle selection change events.
*
* @see ve.ce.SurfaceObserver#poll
*
* @method
* @param {ve.Range} oldRange
* @param {ve.Range} newRange
*/
ve.ce.Surface.prototype.onSelectionChange = function ( oldRange, newRange ) {
if ( oldRange && newRange.flip().equals( oldRange ) ) {
// Ignore when the newRange is just a flipped oldRange
return;
}
this.disableRendering();
this.model.change( null, newRange );
this.enableRendering();
};
/**
* Handle content change events.
*
* @see ve.ce.SurfaceObserver#poll
*
* @method
* @param {HTMLElement} node DOM node the change occured in
* @param {Object} previous Old data
* @param {Object} previous.text Old plain text content
* @param {Object} previous.hash Old DOM hash
* @param {ve.Range} previous.range Old selection
* @param {Object} next New data
* @param {Object} next.text New plain text content
* @param {Object} next.hash New DOM hash
* @param {ve.Range} next.range New selection
*/
ve.ce.Surface.prototype.onContentChange = function ( node, previous, next ) {
var data, range, len, annotations, offsetDiff, lengthDiff, sameLeadingAndTrailing,
previousStart, nextStart, newRange,
previousData, nextData,
i, length, annotation, dataString,
annotationsLeft, annotationsRight,
fromLeft = 0,
fromRight = 0,
nodeOffset = node.getModel().getOffset();
if ( previous.range && next.range ) {
offsetDiff = ( previous.range.isCollapsed() && next.range.isCollapsed() ) ?
next.range.start - previous.range.start : null;
lengthDiff = next.text.length - previous.text.length;
previousStart = previous.range.start - nodeOffset - 1;
nextStart = next.range.start - nodeOffset - 1;
sameLeadingAndTrailing = offsetDiff !== null && (
// TODO: rewrite to static method with tests
(
lengthDiff > 0 &&
previous.text.substring( 0, previousStart ) ===
next.text.substring( 0, previousStart ) &&
previous.text.substring( previousStart ) ===
next.text.substring( nextStart )
) ||
(
lengthDiff < 0 &&
previous.text.substring( 0, nextStart ) ===
next.text.substring( 0, nextStart ) &&
previous.text.substring( previousStart - lengthDiff + offsetDiff ) ===
next.text.substring( nextStart )
)
);
// Simple insertion
if ( lengthDiff > 0 && offsetDiff === lengthDiff /* && sameLeadingAndTrailing */) {
data = ve.splitClusters( next.text ).slice(
previous.range.start - nodeOffset - 1,
next.range.start - nodeOffset - 1
);
// Apply insertion annotations
annotations = this.model.getInsertionAnnotations();
if ( annotations instanceof ve.dm.AnnotationSet ) {
ve.dm.Document.addAnnotationsToData( data, this.model.getInsertionAnnotations() );
}
this.disableRendering();
this.model.change(
ve.dm.Transaction.newFromInsertion(
this.documentView.model, previous.range.start, data
),
next.range
);
this.enableRendering();
return;
}
// Simple deletion
if ( ( offsetDiff === 0 || offsetDiff === lengthDiff ) && sameLeadingAndTrailing ) {
if ( offsetDiff === 0 ) {
range = new ve.Range( next.range.start, next.range.start - lengthDiff );
} else {
range = new ve.Range( next.range.start, previous.range.start );
}
this.disableRendering();
this.model.change(
ve.dm.Transaction.newFromRemoval( this.documentView.model, range ),
next.range
);
this.enableRendering();
return;
}
}
// Complex change
previousData = ve.splitClusters( previous.text );
nextData = ve.splitClusters( next.text );
len = Math.min( previousData.length, nextData.length );
// Count same characters from left
while ( fromLeft < len && previousData[fromLeft] === nextData[fromLeft] ) {
++fromLeft;
}
// Count same characters from right
while (
fromRight < len - fromLeft &&
previousData[previousData.length - 1 - fromRight] ===
nextData[nextData.length - 1 - fromRight]
) {
++fromRight;
}
data = nextData.slice( fromLeft, nextData.length - fromRight );
// Get annotations to the left of new content and apply
annotations = this.model.getDocument().data.getAnnotationsFromOffset( nodeOffset + 1 + fromLeft );
if ( annotations.getLength() ) {
annotationsLeft = this.model.getDocument().data.getAnnotationsFromOffset( nodeOffset + fromLeft );
annotationsRight = this.model.getDocument().data.getAnnotationsFromOffset( nodeOffset + 1 + previousData.length - fromRight );
for ( i = 0, length = annotations.getLength(); i < length; i++ ) {
annotation = annotations.get( i );
if ( annotation.constructor.static.splitOnWordbreak ) {
dataString = new ve.dm.DataString( nextData );
if (
// if no annotation to the right, check for wordbreak
(
!annotationsRight.containsIndex( i ) &&
unicodeJS.wordbreak.isBreak( dataString, fromLeft )
) ||
// if no annotation to the left, check for wordbreak
(
!annotationsLeft.containsIndex( i ) &&
unicodeJS.wordbreak.isBreak( dataString, nextData.length - fromRight )
)
) {
annotations.removeAt( i );
}
}
}
ve.dm.Document.addAnnotationsToData( data, annotations );
}
newRange = next.range;
if ( newRange.isCollapsed() ) {
newRange = new ve.Range( this.getNearestCorrectOffset( newRange.start, 1 ) );
}
if ( data.length > 0 ) {
this.model.change(
ve.dm.Transaction.newFromInsertion(
this.documentView.model, nodeOffset + 1 + fromLeft, data
),
newRange
);
}
if ( fromLeft + fromRight < previousData.length ) {
this.model.change(
ve.dm.Transaction.newFromRemoval(
this.documentView.model,
new ve.Range(
data.length + nodeOffset + 1 + fromLeft,
data.length + nodeOffset + 1 + previousData.length - fromRight
)
),
newRange
);
}
};
/**
* Handle surface lock events.
*
* @method
*/
ve.ce.Surface.prototype.onLock = function () {
this.surfaceObserver.stop();
};
/**
* Handle surface unlock events.
*
* @method
*/
ve.ce.Surface.prototype.onUnlock = function () {
this.surfaceObserver.clear( this.model.getSelection() );
this.surfaceObserver.start();
};
/*! Relocation */
/**
* Start a relocation action.
*
* @see ve.ce.RelocatableNode
*
* @method
* @param {ve.ce.Node} node Node being relocated
*/
ve.ce.Surface.prototype.startRelocation = function ( node ) {
this.relocating = node;
this.emit( 'relocationStart', node );
};
/**
* Complete a relocation action.
*
* @see ve.ce.RelocatableNode
*
* @method
* @param {ve.ce.Node} node Node being relocated
*/
ve.ce.Surface.prototype.endRelocation = function () {
this.emit( 'relocationEnd', this.relocating );
this.relocating = null;
};
/*! Utilities */
/**
* @method
*/
ve.ce.Surface.prototype.handleLeftOrRightArrowKey = function ( e ) {
var selection, range, direction;
// On Mac OS pressing Command (metaKey) + Left/Right is same as pressing Home/End.
// As we are not able to handle it programmatically (because we don't know at which offsets
// lines starts and ends) let it happen natively.
if ( e.metaKey ) {
return;
}
// Selection is going to be displayed programmatically so prevent default browser behaviour
e.preventDefault();
// Stop with final poll cycle so we have correct information in model
this.surfaceObserver.stop( true );
selection = this.model.getSelection();
if ( this.$$( e.target ).css( 'direction' ) === 'rtl' ) {
// If the language direction is RTL, switch left/right directions:
direction = e.keyCode === ve.Keys.LEFT ? 1 : -1;
} else {
direction = e.keyCode === ve.Keys.LEFT ? -1 : 1;
}
range = this.getDocument().getRelativeRange(
selection,
direction,
( e.altKey === true || e.ctrlKey === true ) ? 'word' : 'character',
e.shiftKey
);
this.model.change( null, range );
this.surfaceObserver.start();
};
/**
* @method
*/
ve.ce.Surface.prototype.handleUpOrDownArrowKey = function ( e ) {
var selection, rangySelection, rangyRange, range, $element, nativeSel;
if ( !$.browser.msie ) {
// Firefox doesn't update its internal reference of the appropriate cursor position
// on the next or previous lines when the cursor is moved programmatically.
// By wiggling the selection, Firefox scraps its internal reference.
nativeSel = window.getSelection();
nativeSel.modify( 'extend', 'right', 'character' );
nativeSel.modify( 'extend', 'left', 'character' );
return;
}
this.surfaceObserver.stop( true );
selection = this.model.getSelection();
rangySelection = rangy.getSelection( this.$document[0] );
// Perform programatic handling only for selection that is expanded and backwards according to
// model data but not according to browser data.
if ( !selection.isCollapsed() && selection.isBackwards() && !rangySelection.isBackwards() ) {
$element = $( this.documentView.getSlugAtOffset( selection.to ) );
if ( !$element ) {
$element = this.$$( '<span>' )
.html( ' ' )
.css( { 'width' : '0px', 'display' : 'none' } );
rangySelection.anchorNode.splitText( rangySelection.anchorOffset );
rangySelection.anchorNode.parentNode.insertBefore(
$element[0],
rangySelection.anchorNode.nextSibling
);
}
rangyRange = rangy.createRange( this.$document[0] );
rangyRange.selectNode( $element[0] );
rangySelection.setSingleRange( rangyRange );
setTimeout( ve.bind( function () {
if ( !$element.hasClass( 've-ce-branchNode-slug' ) ) {
$element.remove();
}
this.surfaceObserver.start();
this.surfaceObserver.stop( false );
if ( e.shiftKey === true ) { // expanded range
range = new ve.Range( selection.from, this.model.getSelection().to );
} else { // collapsed range (just a cursor)
range = new ve.Range( this.model.getSelection().to );
}
this.model.change( null, range );
this.surfaceObserver.start();
}, this ), 0 );
} else {
this.surfaceObserver.start();
}
};
/**
* Handle insertion of content.
*
* @method
*/
ve.ce.Surface.prototype.handleInsertion = function () {
var slug, data, range, annotations, insertionAnnotations, placeholder,
selection = this.model.getSelection(), documentModel = this.model.getDocument();
// Handles removing expanded selection before inserting new text
if ( !selection.isCollapsed() ) {
// Pull annotations from the first character in the selection
annotations = documentModel.data.getAnnotationsFromRange(
new ve.Range( selection.start, selection.start + 1 )
);
this.model.change(
ve.dm.Transaction.newFromRemoval( this.documentView.model, selection ),
new ve.Range( selection.start )
);
this.surfaceObserver.clear();
selection = this.model.getSelection();
this.model.setInsertionAnnotations( annotations );
}
insertionAnnotations = this.model.getInsertionAnnotations() ||
new ve.dm.AnnotationSet( documentModel.getStore() );
if ( selection.isCollapsed() ) {
slug = this.documentView.getSlugAtOffset( selection.start );
// Always pawn in a slug
if ( slug || this.needsPawn( selection, insertionAnnotations ) ) {
placeholder = '♙';
if ( !insertionAnnotations.isEmpty() ) {
placeholder = [placeholder, insertionAnnotations.getIndexes()];
}
// is this a slug and if so, is this a block slug?
if ( slug && documentModel.data.isStructuralOffset( selection.start ) ) {
range = new ve.Range( selection.start + 1, selection.start + 2 );
data = [{ 'type' : 'paragraph' }, placeholder, { 'type' : '/paragraph' }];
} else {
range = new ve.Range( selection.start, selection.start + 1 );
data = [placeholder];
}
this.model.change(
ve.dm.Transaction.newFromInsertion(
this.documentView.model, selection.start, data
),
range
);
}
}
this.surfaceObserver.stop( true );
};
/**
* Handle enter key down events.
*
* @method
* @param {jQuery.Event} e Enter key down event
*/
ve.ce.Surface.prototype.handleEnter = function ( e ) {
var tx, outerParent, outerChildrenCount, list,
selection = this.model.getSelection(),
documentModel = this.model.getDocument(),
emptyParagraph = [{ 'type': 'paragraph' }, { 'type': '/paragraph' }],
advanceCursor = true,
node = this.documentView.getNodeFromOffset( selection.from ),
nodeModel = node.getModel(),
cursor = selection.from,
contentBranchModel = nodeModel.isContent() ? nodeModel.getParent() : nodeModel,
contentBranchModelRange = contentBranchModel.getRange(),
stack = [],
outermostNode = null;
// Handle removal first
if ( selection.from !== selection.to ) {
tx = ve.dm.Transaction.newFromRemoval( documentModel, selection );
selection = tx.translateRange( selection );
this.model.change( tx, selection );
}
// Handle insertion
if (
contentBranchModel.getType() !== 'paragraph' &&
(
cursor === contentBranchModelRange.from ||
cursor === contentBranchModelRange.to
)
) {
// If we're at the start/end of something that's not a paragraph, insert a paragraph
// before/after
if ( cursor === contentBranchModelRange.from ) {
tx = ve.dm.Transaction.newFromInsertion(
documentModel, contentBranchModel.getOuterRange().from, emptyParagraph
);
advanceCursor = false;
} else if ( cursor === contentBranchModelRange.to ) {
tx = ve.dm.Transaction.newFromInsertion(
documentModel, contentBranchModel.getOuterRange().to, emptyParagraph
);
}
} else if ( e.shiftKey && contentBranchModel.hasSignificantWhitespace() ) {
// Insert newline
tx = ve.dm.Transaction.newFromInsertion( documentModel, selection.from, '\n' );
} else {
// Split
node.traverseUpstream( function ( node ) {
if ( !node.canBeSplit() ) {
return false;
}
stack.splice(
stack.length / 2,
0,
{ 'type': '/' + node.type },
node.model.getClonedElement()
);
outermostNode = node;
if ( e.shiftKey ) {
return false;
} else {
return true;
}
} );
outerParent = outermostNode.getModel().getParent();
outerChildrenCount = outerParent.getChildren().length;
if (
// This is a list item
outermostNode.type === 'listItem' &&
// This is the last list item
outerParent.getChildren()[outerChildrenCount - 1] === outermostNode.getModel() &&
// There is one child
outermostNode.children.length === 1 &&
// The child is empty
node.model.length === 0
) {
// Enter was pressed in an empty list item.
list = outermostNode.getModel().getParent();
if ( list.getChildren().length === 1 ) {
// The list item we're about to remove is the only child of the list
// Remove the list
tx = ve.dm.Transaction.newFromRemoval(
documentModel, list.getOuterRange()
);
} else {
// Remove the list item
tx = ve.dm.Transaction.newFromRemoval(
documentModel, outermostNode.getModel().getOuterRange()
);
this.model.change( tx );
selection = tx.translateRange( selection );
// Insert a paragraph
tx = ve.dm.Transaction.newFromInsertion(
documentModel, list.getOuterRange().to, emptyParagraph
);
}
advanceCursor = false;
} else {
// We must process the transaction first because getRelativeContentOffset can't help us
// yet
tx = ve.dm.Transaction.newFromInsertion( documentModel, selection.from, stack );
}
}
// Commit the transaction
this.model.change( tx );
selection = tx.translateRange( selection );
// Now we can move the cursor forward
if ( advanceCursor ) {
this.model.change(
null, new ve.Range( documentModel.data.getRelativeContentOffset( selection.from, 1 ) )
);
} else {
this.model.change(
null, new ve.Range( documentModel.data.getNearestContentOffset( selection.from ) )
);
}
// Reset and resume polling
this.surfaceObserver.clear();
};
/**
* Handle delete and backspace key down events.
*
* @method
* @param {jQuery.Event} e Delete key down event
* @param {boolean} backspace Key was a backspace
*/
ve.ce.Surface.prototype.handleDelete = function ( e, backspace ) {
var rangeToRemove = this.model.getSelection(),
tx, endNode, endNodeData, nodeToDelete;
if ( rangeToRemove.isCollapsed() ) {
// In case when the range is collapsed use the same logic that is used for cursor left and
// right movement in order to figure out range to remove.
rangeToRemove = this.getDocument().getRelativeRange(
rangeToRemove,
backspace ? -1 : 1,
( e.altKey === true || e.ctrlKey === true ) ? 'word' : 'character',
true
);
if ( rangeToRemove.isCollapsed() ) {
// For instance beginning or end of the document.
return;
}
}
tx = ve.dm.Transaction.newFromRemoval( this.documentView.model, rangeToRemove );
this.model.change( tx );
rangeToRemove = tx.translateRange( rangeToRemove );
if ( !rangeToRemove.isCollapsed() ) {
// If after processing removal transaction range is not collapsed it means that not
// everything got merged nicely (at this moment transaction processor is capable of merging
// nodes of the same type and at the same depth level only), so we process with another
// merging that takes remaing data from "endNode" and inserts it at the end of "startNode",
// "endNode" or recrusivly its parent (if have only one child) gets removed.
endNode = this.documentView.getNodeFromOffset( rangeToRemove.end, false );
// If "endNode" is within our rangeToRemove, then we shouldn't delete it
if ( endNode.getModel().getRange().start >= rangeToRemove.end ) {
endNodeData = this.documentView.model.getData( endNode.getModel().getRange() );
nodeToDelete = endNode;
nodeToDelete.traverseUpstream( function ( node ) {
var parent = node.getParent();
if ( parent.children.length === 1 ) {
nodeToDelete = parent;
return true;
} else {
return false;
}
} );
this.model.change(
[
ve.dm.Transaction.newFromRemoval(
this.documentView.model, nodeToDelete.getModel().getOuterRange()
),
ve.dm.Transaction.newFromInsertion(
this.documentView.model, rangeToRemove.start, endNodeData
)
]
);
}
}
this.model.change( null, new ve.Range( rangeToRemove.start ) );
this.surfaceObserver.clear();
};
/**
* Show selection on a range.
*
* @method
* @param {ve.Range} range Range to show selection on
*/
ve.ce.Surface.prototype.showSelection = function ( range ) {
var start, end,
rangySel = rangy.getSelection( this.$document[0] ),
rangyRange = rangy.createRange( this.$document[0] );
range = new ve.Range(
this.getNearestCorrectOffset( range.from, -1 ),
this.getNearestCorrectOffset( range.to, 1 )
);
if ( !range.isCollapsed() ) {
start = this.documentView.getNodeAndOffset( range.start );
end = this.documentView.getNodeAndOffset( range.end );
rangyRange.setStart( start.node, start.offset );
rangyRange.setEnd( end.node, end.offset );
rangySel.removeAllRanges();
rangySel.addRange( rangyRange, range.start !== range.from );
} else {
start = this.documentView.getNodeAndOffset( range.start );
rangyRange.setStart( start.node, start.offset );
rangySel.setSingleRange( rangyRange );
}
};
/**
* Append passed phantoms to phantoms container after emptying it first.
*
* @method
* @param {jQuery} $phantoms Phantoms to append
*/
ve.ce.Surface.prototype.replacePhantoms = function ( $phantoms ) {
this.$phantoms.empty().append( $phantoms );
};
/**
* Append passed highlights to highlight container after emptying it first.
*
* @method
* @param {jQuery} $highlights Highlights to append
*/
ve.ce.Surface.prototype.replaceHighlight = function ( $highlights ) {
this.$highlights.empty().append( $highlights );
};
/*! Helpers */
/**
* Get the nearest offset that a cursor can be placed at.
*
* TODO: Find a better name and a better place for this method
*
* @method
* @param {number} offset Offset to start looking at
* @param {number} [direction=-1] Direction to look in, +1 or -1
*/
ve.ce.Surface.prototype.getNearestCorrectOffset = function ( offset, direction ) {
var contentOffset, structuralOffset;
direction = direction > 0 ? 1 : -1;
if (
this.documentView.model.data.isContentOffset( offset ) ||
this.hasSlugAtOffset( offset )
) {
return offset;
}
contentOffset = this.documentView.model.data.getNearestContentOffset( offset, direction );
structuralOffset =
this.documentView.model.data.getNearestStructuralOffset( offset, direction, true );
if ( !this.hasSlugAtOffset( structuralOffset ) ) {
return contentOffset;
}
if ( direction === 1 ) {
if ( contentOffset < offset ) {
return structuralOffset;
} else {
return Math.min( contentOffset, structuralOffset );
}
} else {
if ( contentOffset > offset ) {
return structuralOffset;
} else {
return Math.max( contentOffset, structuralOffset );
}
}
};
/**
* Check if an offset is inside a slug.
*
* TODO: Find a better name and a better place for this method - probably in a document view?
*
* @method
* @param {number} offset Offset to check for a slug at
* @returns {boolean} A slug exists at the given offset
*/
ve.ce.Surface.prototype.hasSlugAtOffset = function ( offset ) {
return !!this.documentView.getSlugAtOffset( offset );
};
/**
* Get the number of consecutive clicks the user has performed.
*
* This is required for supporting double, tripple, etc. clicking across all browsers.
*
* @method
* @param {Event} e Native event object
* @returns {number} Number of clicks detected
*/
ve.ce.Surface.prototype.getClickCount = function ( e ) {
if ( !$.browser.msie ) {
return e.detail;
}
var i, response = 1;
// Add select MouseEvent properties to the beginning of the clickHistory
this.clickHistory.unshift( {
x: e.x,
y: e.y,
timeStamp: e.timeStamp
} );
// Compare history
if ( this.clickHistory.length > 1 ) {
for ( i = 0; i < this.clickHistory.length - 1; i++ ) {
if (
this.clickHistory[i].x === this.clickHistory[i + 1].x &&
this.clickHistory[i].y === this.clickHistory[i + 1].y &&
this.clickHistory[i].timeStamp - this.clickHistory[i + 1].timeStamp < 500
) {
response++;
} else {
break;
}
}
}
// Trim old history if necessary
if ( this.clickHistory.length > 3 ) {
this.clickHistory.pop();
}
return response;
};
/**
* Checks if we need to pawn for insertionAnnotations based on the related annotationSet.
*
* "Related" is typically to the left, unless at the beginning of a node.
*
* We choose to pawn if the related annotationSet doesn't match insertionAnnotations, or if
* we are at the edge of an annotation that requires pawning (i.e. an annotation requiring pawning
* is present on the left but not on the right, or vice versa).
*
* @method
* @param {ve.Range} selection
* @param {ve.dm.AnnotationSet} insertionAnnotations
* @returns {boolean} Whether we need to pawn
*/
ve.ce.Surface.prototype.needsPawn = function ( selection, insertionAnnotations ) {
var leftAnnotations, rightAnnotations, documentModel = this.model.documentModel;
function isForced( annotation ) {
return ve.ce.annotationFactory.isAnnotationContinuationForced( annotation.constructor.static.name );
}
if ( selection.start > 0 ) {
leftAnnotations = documentModel.data.getAnnotationsFromOffset( selection.start - 1 );
}
if ( selection.start < documentModel.data.getLength() ) {
rightAnnotations = documentModel.data.getAnnotationsFromOffset( selection.start + 1 );
}
// Take annotations from the left
// TODO reorganize the logic in this function
if ( leftAnnotations && !leftAnnotations.compareTo( insertionAnnotations ) ) {
return true;
}
// At the beginning of a node, take from the right
if (
rangy.getSelection( this.$document[0] ).anchorOffset === 0 &&
rightAnnotations &&
!rightAnnotations.compareTo( insertionAnnotations )
) {
return true;
}
if (
leftAnnotations && rightAnnotations &&
!leftAnnotations.filter( isForced ).compareTo( rightAnnotations.filter( isForced ) )
) {
return true;
}
return false;
};
/*! Getters */
/**
* Get the top-level surface.
*
* @method
* @returns {ve.ui.Surface} Surface
*/
ve.ce.Surface.prototype.getSurface = function () {
return this.surface;
};
/**
* Get the surface model.
*
* @method
* @returns {ve.dm.Surface} Surface model
*/
ve.ce.Surface.prototype.getModel = function () {
return this.model;
};
/**
* Get the document view.
*
* @method
* @returns {ve.ce.Document} Document view
*/
ve.ce.Surface.prototype.getDocument = function () {
return this.documentView;
};
/**
* Get the currently focused node.
*
* @method
* @returns {ve.ce.Node|undefined} Focused node
*/
ve.ce.Surface.prototype.getFocusedNode = function () {
return this.focusedNode;
};
/**
* Check if rendering is enabled.
*
* @method
* @returns {boolean} Render is enabled
*/
ve.ce.Surface.prototype.isRenderingEnabled = function () {
return this.renderingEnabled;
};
/**
* Enable rendering.
*
* @method
*/
ve.ce.Surface.prototype.enableRendering = function () {
this.renderingEnabled = true;
};
/**
* Disable rendering.
*
* @method
*/
ve.ce.Surface.prototype.disableRendering = function () {
this.renderingEnabled = false;
};
/**
* Surface 'dir' property (Content-Level Direction)
* @returns {string} 'ltr' or 'rtl'
*/
ve.ce.Surface.prototype.getDir = function () {
return this.$.css( 'direction' );
};