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* VisualEditor DataModel Surface class.
*
* @copyright See AUTHORS.txt
*/
/**
* DataModel surface for a node within a document
*
* Methods do not check that ranges actually lie inside the surfaced node
*
* @class
* @mixins OO.EventEmitter
*
* @constructor
* @param {ve.dm.Document} doc Document model to create surface for
* @param {ve.dm.BranchNode} [attachedRoot] Node to surface; default is document node
* @param {Object} [config] Configuration options
* @cfg {boolean} [sourceMode=false] Source editing mode
*/
ve.dm.Surface = function VeDmSurface( doc, attachedRoot, config ) {
// Support old (doc, config) argument order
// TODO: Remove this once all callers are updated
if ( !config && ve.isPlainObject( attachedRoot ) ) {
config = attachedRoot;
attachedRoot = undefined;
}
attachedRoot = attachedRoot || doc.getDocumentNode();
config = config || {};
Iif ( !( attachedRoot instanceof ve.dm.BranchNode ) ) {
throw new Error( 'Expected ve.dm.BranchNode for attachedRoot' );
}
// Mixin constructors
OO.EventEmitter.call( this );
// Properties
this.documentModel = doc;
this.attachedRoot = attachedRoot;
this.sourceMode = !!config.sourceMode;
this.selection = new ve.dm.NullSelection();
// The selection before the most recent stack of changes was applied
this.selectionBefore = this.selection;
this.translatedSelection = null;
this.branchNodes = {};
this.selectedNode = null;
this.newTransactions = [];
this.stagingStack = [];
this.undoStack = [];
this.undoIndex = 0;
this.undoConflict = false;
this.historyTrackingInterval = null;
this.insertionAnnotations = new ve.dm.AnnotationSet( this.getDocument().getStore() );
this.selectedAnnotations = new ve.dm.AnnotationSet( this.getDocument().getStore() );
this.isCollapsed = null;
this.multiUser = false;
this.readOnly = false;
this.transacting = false;
this.queueingContextChanges = false;
this.contextChangeQueued = false;
this.authorId = null;
this.lastStoredChange = doc.getCompleteHistoryLength();
this.autosaveFailed = false;
this.autosavePrefix = '';
this.synchronizer = null;
this.storing = false;
this.setStorage( ve.init.platform.sessionStorage );
// Let document know about the attachedRoot
this.documentModel.attachedRoot = this.attachedRoot;
// Events
this.getDocument().connect( this, {
transact: 'onDocumentTransact',
precommit: 'onDocumentPreCommit'
} );
this.storeChangesListener = this.storeChanges.bind( this );
this.storeDocStorageListener = this.storeDocStorage.bind( this );
};
/* Inheritance */
OO.mixinClass( ve.dm.Surface, OO.EventEmitter );
/* Events */
/**
* @event select
* @param {ve.dm.Selection} selection
*/
/**
* @event focus
*
* The selection was just set to a non-null selection
*/
/**
* @event blur
*
* The selection was just set to a null selection
*/
/**
* @event documentUpdate
*
* Emitted when a transaction has been processed on the document and the selection has been
* translated to account for that transaction. You should only use this event if you need
* to access the selection; in most cases, you should use {ve.dm.Document#event-transact}.
*
* @param {ve.dm.Transaction} tx Transaction that was processed on the document
*/
/**
* @event contextChange
*/
/**
* @event insertionAnnotationsChange
* @param {ve.dm.AnnotationSet} insertionAnnotations AnnotationSet being inserted
*/
/**
* @event history
* Emitted when the history stacks change, or the ability to use them changes.
*/
/**
* @event undoStackChange
* Emitted when the main undo stack changes (this.undoStack or this.undoIndex).
*/
/**
* @event autosaveFailed
* Auto-save failed to store a change
*/
/* Methods */
/**
* Set the read-only state of the surface
*
* @param {boolean} readOnly Make surface read-only
*/
ve.dm.Surface.prototype.setReadOnly = function ( readOnly ) {
Iif ( !!readOnly !== this.readOnly ) {
this.readOnly = !!readOnly;
if ( readOnly ) {
this.stopHistoryTracking();
} else {
this.startHistoryTracking();
}
this.getDocument().setReadOnly( readOnly );
this.emit( 'contextChange' );
}
};
/**
* Check if the surface is read-only
*
* @return {boolean}
*/
ve.dm.Surface.prototype.isReadOnly = function () {
return this.readOnly;
};
/**
* Initialize the surface model
*
* @fires contextChange
*/
ve.dm.Surface.prototype.initialize = function () {
this.startHistoryTracking();
this.emit( 'contextChange' );
};
/**
* Get the DOM representation of the surface's current state.
*
* @return {HTMLDocument|string} HTML document (visual mode) or text (source mode)
*/
ve.dm.Surface.prototype.getDom = function () {
Iif ( this.sourceMode ) {
return ve.dm.sourceConverter.getSourceTextFromModel( this.getDocument() );
} else {
return ve.dm.converter.getDomFromModel( this.getDocument() );
}
};
/**
* Get the HTML representation of the surface's current state.
*
* @return {string} HTML
*/
ve.dm.Surface.prototype.getHtml = function () {
return this.sourceMode ?
this.getDom() :
ve.properInnerHtml( this.getDom().body );
};
/**
* Set the surface multi-user mode
*
* @param {boolean} multiUser Multi-user mode
*/
ve.dm.Surface.prototype.setMultiUser = function ( multiUser ) {
this.multiUser = multiUser;
};
/**
* Check if the surface is in multi-user mode
*
* @return {boolean} Surface is in multi-user mode
*/
ve.dm.Surface.prototype.isMultiUser = function () {
return this.multiUser;
};
/**
* Create a surface synchronizer.
*
* Must be created before the surface model is added to a view.
*
* @param {string} documentId Document ID
* @param {Object} [config] Configuration options
*/
ve.dm.Surface.prototype.createSynchronizer = function ( documentId, config ) {
if ( this.synchronizer ) {
throw new Error( 'Synchronizer already set' );
}
this.setNullSelection();
this.setMultiUser( true );
this.synchronizer = new ve.dm.SurfaceSynchronizer( this, documentId, config );
};
/**
* Start tracking state changes in history.
*/
ve.dm.Surface.prototype.startHistoryTracking = function () {
Iif ( this.readOnly ) {
return;
}
if ( this.historyTrackingInterval === null ) {
this.historyTrackingInterval = setInterval( this.breakpoint.bind( this ), 3000 );
}
};
/**
* Stop tracking state changes in history.
*/
ve.dm.Surface.prototype.stopHistoryTracking = function () {
Iif ( this.readOnly ) {
return;
}
if ( this.historyTrackingInterval !== null ) {
clearInterval( this.historyTrackingInterval );
this.historyTrackingInterval = null;
}
};
/**
* Reset the timer for automatic history-tracking
*/
ve.dm.Surface.prototype.resetHistoryTrackingInterval = function () {
this.stopHistoryTracking();
this.startHistoryTracking();
};
/**
* Get a list of all applied history states.
*
* @return {Object[]} List of applied transaction stacks
*/
ve.dm.Surface.prototype.getHistory = function () {
var appliedUndoStack = this.undoStack.slice( 0, this.undoStack.length - this.undoIndex );
if ( this.newTransactions.length > 0 ) {
return appliedUndoStack.concat( [ { transactions: this.newTransactions.slice( 0 ) } ] );
}
return appliedUndoStack;
};
/**
* If the surface in staging mode.
*
* @return {boolean} The surface in staging mode
*/
ve.dm.Surface.prototype.isStaging = function () {
return this.stagingStack.length > 0;
};
/**
* Get the staging state at the current staging stack depth
*
* @return {Object|undefined} staging Staging state object, or undefined if not staging
* @return {ve.dm.Transaction[]} staging.transactions Staging transactions
* @return {ve.dm.Selection} staging.selectionBefore Selection before transactions were applied
* @return {boolean} staging.allowUndo Allow undo while staging
*/
ve.dm.Surface.prototype.getStaging = function () {
return this.stagingStack[ this.stagingStack.length - 1 ];
};
/**
* Undo is allowed at the current staging stack depth
*
* @return {boolean|undefined} Undo is allowed, or undefined if not staging
*/
ve.dm.Surface.prototype.doesStagingAllowUndo = function () {
var staging = this.getStaging();
return staging && staging.allowUndo;
};
/**
* Get the staging transactions at the current staging stack depth
*
* The array is returned by reference so it can be pushed to.
*
* @return {ve.dm.Transaction[]|undefined} Staging transactions, or undefined if not staging
*/
ve.dm.Surface.prototype.getStagingTransactions = function () {
var staging = this.getStaging();
return staging && staging.transactions;
};
/**
* Push another level of staging to the staging stack
*
* @param {boolean} [allowUndo=false] Allow undo while staging
*/
ve.dm.Surface.prototype.pushStaging = function ( allowUndo ) {
// If we're starting staging stop history tracking
if ( !this.isStaging() ) {
Iif ( this.synchronizer ) {
this.synchronizer.pauseChanges();
}
// Set a breakpoint to make sure newTransactions is clear
this.breakpoint();
this.stopHistoryTracking();
this.emit( 'history' );
}
this.stagingStack.push( {
transactions: [],
// Will get overridden after the first transaction, but while the
// stack is empty, should be equal to the previous selectionBefore.
selectionBefore: this.isStaging() ? this.getStaging().selectionBefore : this.selectionBefore,
allowUndo: !!allowUndo
} );
};
/**
* Pop a level of staging from the staging stack
*
* @fires history
* @return {ve.dm.Transaction[]|undefined} Staging transactions, or undefined if not staging
*/
ve.dm.Surface.prototype.popStaging = function () {
Iif ( !this.isStaging() ) {
return;
}
var staging = this.stagingStack.pop();
var transactions = staging.transactions;
var reverseTransactions = [];
// Not applying, so rollback transactions
for ( var i = transactions.length - 1; i >= 0; i-- ) {
var transaction = transactions[ i ].reversed();
reverseTransactions.push( transaction );
}
this.changeInternal( reverseTransactions, staging.selectionBefore, true );
if ( !this.isStaging() ) {
Iif ( this.synchronizer ) {
this.synchronizer.resumeChanges();
}
this.startHistoryTracking();
this.emit( 'history' );
}
return transactions;
};
/**
* Apply a level of staging from the staging stack
*
* @fires history
*/
ve.dm.Surface.prototype.applyStaging = function () {
Iif ( !this.isStaging() ) {
return;
}
var staging = this.stagingStack.pop();
if ( this.isStaging() ) {
// Merge popped transactions into the current item in the staging stack
ve.batchPush( this.getStagingTransactions(), staging.transactions );
// If the current level has a null selectionBefore, copy that over too
Iif ( this.getStaging().selectionBefore.isNull() ) {
this.getStaging().selectionBefore = staging.selectionBefore;
}
} else {
this.truncateUndoStack();
// Move transactions to the undo stack
this.newTransactions = staging.transactions;
this.selectionBefore = staging.selectionBefore;
this.breakpoint();
}
if ( !this.isStaging() ) {
Iif ( this.synchronizer ) {
this.synchronizer.resumeChanges();
}
this.startHistoryTracking();
this.emit( 'history' );
}
};
/**
* Pop the staging stack until empty
*
* @return {ve.dm.Transaction[]|undefined} Staging transactions, or undefined if not staging
*/
ve.dm.Surface.prototype.popAllStaging = function () {
Iif ( !this.isStaging() ) {
return;
}
var transactions = [];
while ( this.isStaging() ) {
ve.batchSplice( transactions, 0, 0, this.popStaging() );
}
return transactions;
};
/**
* Apply the staging stack until empty
*/
ve.dm.Surface.prototype.applyAllStaging = function () {
while ( this.isStaging() ) {
this.applyStaging();
}
};
/**
* Get annotations that will be used upon insertion.
*
* @return {ve.dm.AnnotationSet} Insertion annotations
*/
ve.dm.Surface.prototype.getInsertionAnnotations = function () {
return this.insertionAnnotations.clone();
};
/**
* Set annotations that will be used upon insertion.
*
* @param {ve.dm.AnnotationSet|null} annotations Insertion annotations to use or null to disable them
* @fires insertionAnnotationsChange
* @fires contextChange
*/
ve.dm.Surface.prototype.setInsertionAnnotations = function ( annotations ) {
Iif ( this.readOnly ) {
return;
}
this.insertionAnnotations = annotations !== null ?
annotations.clone() :
new ve.dm.AnnotationSet( this.getDocument().getStore() );
this.emit( 'insertionAnnotationsChange', this.insertionAnnotations );
this.emit( 'contextChange' );
};
/**
* Add an annotation to be used upon insertion.
*
* @param {ve.dm.Annotation|ve.dm.AnnotationSet} annotations Insertion annotation to add
* @fires insertionAnnotationsChange
* @fires contextChange
*/
ve.dm.Surface.prototype.addInsertionAnnotations = function ( annotations ) {
Iif ( this.readOnly ) {
return;
}
if ( annotations instanceof ve.dm.Annotation ) {
this.insertionAnnotations.push( annotations );
} else Eif ( annotations instanceof ve.dm.AnnotationSet ) {
this.insertionAnnotations.addSet( annotations );
} else {
throw new Error( 'Invalid annotations' );
}
this.emit( 'insertionAnnotationsChange', this.insertionAnnotations );
this.emit( 'contextChange' );
};
/**
* Remove an annotation from those that will be used upon insertion.
*
* @param {ve.dm.Annotation|ve.dm.AnnotationSet} annotations Insertion annotation to remove
* @fires insertionAnnotationsChange
* @fires contextChange
*/
ve.dm.Surface.prototype.removeInsertionAnnotations = function ( annotations ) {
if ( this.readOnly ) {
return;
}
if ( annotations instanceof ve.dm.Annotation ) {
this.insertionAnnotations.remove( annotations );
} else if ( annotations instanceof ve.dm.AnnotationSet ) {
this.insertionAnnotations.removeSet( annotations );
} else {
throw new Error( 'Invalid annotations' );
}
this.emit( 'insertionAnnotationsChange', this.insertionAnnotations );
this.emit( 'contextChange' );
};
/**
* Check if redo is allowed in the current state.
*
* @return {boolean} Redo is allowed
*/
ve.dm.Surface.prototype.canRedo = function () {
return this.undoIndex > 0 && !this.readOnly;
};
/**
* Check if undo is allowed in the current state.
*
* @return {boolean} Undo is allowed
*/
ve.dm.Surface.prototype.canUndo = function () {
return this.hasBeenModified() && !this.readOnly && ( !this.isStaging() || this.doesStagingAllowUndo() ) && !this.undoConflict;
};
/**
* Check if the surface has been modified.
*
* This only checks if there are transactions which haven't been undone.
*
* @return {boolean} The surface has been modified
*/
ve.dm.Surface.prototype.hasBeenModified = function () {
return this.undoStack.length - this.undoIndex > 0 || !!this.newTransactions.length;
};
/**
* Get the document model.
*
* @return {ve.dm.Document} Document model of the surface
*/
ve.dm.Surface.prototype.getDocument = function () {
return this.documentModel;
};
/**
* Get the surfaced node
*
* @return {ve.dm.BranchNode} The surfaced node
*/
ve.dm.Surface.prototype.getAttachedRoot = function () {
return this.attachedRoot;
};
/**
* Get the selection.
*
* @return {ve.dm.Selection} Current selection
*/
ve.dm.Surface.prototype.getSelection = function () {
return this.selection;
};
/**
* Get the selection translated for the transaction that's being committed, if any.
*
* @return {ve.dm.Selection} Current selection translated for new transaction
*/
ve.dm.Surface.prototype.getTranslatedSelection = function () {
return this.translatedSelection || this.selection;
};
/**
* Get a fragment for a selection.
*
* @param {ve.dm.Selection} [selection] Selection within target document, current selection used by default
* @param {boolean} [noAutoSelect] Don't update the surface's selection when making changes
* @param {boolean} [excludeInsertions] Exclude inserted content at the boundaries when updating range
* @return {ve.dm.SurfaceFragment} Surface fragment
*/
ve.dm.Surface.prototype.getFragment = function ( selection, noAutoSelect, excludeInsertions ) {
selection = selection || this.selection;
// TODO: Use a factory pattern to generate fragments
return this.sourceMode ?
new ve.dm.SourceSurfaceFragment( this, selection, noAutoSelect, excludeInsertions ) :
new ve.dm.SurfaceFragment( this, selection, noAutoSelect, excludeInsertions );
};
/**
* Get a fragment for a linear selection's range.
*
* @param {ve.Range} range Selection's range
* @param {boolean} [noAutoSelect] Don't update the surface's selection when making changes
* @param {boolean} [excludeInsertions] Exclude inserted content at the boundaries when updating range
* @return {ve.dm.SurfaceFragment} Surface fragment
*/
ve.dm.Surface.prototype.getLinearFragment = function ( range, noAutoSelect, excludeInsertions ) {
return this.getFragment( new ve.dm.LinearSelection( range ), noAutoSelect, excludeInsertions );
};
/**
* Prevent future states from being redone.
*
* Callers should eventually emit a 'history' event after using this method.
*
* @fires undoStackChange
*/
ve.dm.Surface.prototype.truncateUndoStack = function () {
if ( this.undoIndex ) {
this.undoStack = this.undoStack.slice( 0, this.undoStack.length - this.undoIndex );
this.undoIndex = 0;
this.emit( 'undoStackChange' );
}
};
/**
* Start queueing up calls to #emitContextChange until #stopQueueingContextChanges is called.
* While queueing is active, contextChanges are also collapsed, so if #emitContextChange is called
* multiple times, only one contextChange event will be emitted by #stopQueueingContextChanges.
*
* this.emitContextChange(); // emits immediately
* this.startQueueingContextChanges();
* this.emitContextChange(); // doesn't emit
* this.emitContextChange(); // doesn't emit
* this.stopQueueingContextChanges(); // emits one contextChange event
*
* @private
*/
ve.dm.Surface.prototype.startQueueingContextChanges = function () {
if ( !this.queueingContextChanges ) {
this.queueingContextChanges = true;
this.contextChangeQueued = false;
}
};
/**
* Emit a contextChange event. If #startQueueingContextChanges has been called, then the event
* is deferred until #stopQueueingContextChanges is called.
*
* @private
* @fires contextChange
*/
ve.dm.Surface.prototype.emitContextChange = function () {
if ( this.queueingContextChanges ) {
this.contextChangeQueued = true;
} else {
this.emit( 'contextChange' );
}
};
/**
* Stop queueing contextChange events. If #emitContextChange was called previously, a contextChange
* event will now be emitted. Any future calls to #emitContextChange will once again emit the
* event immediately.
*
* @private
* @fires contextChange
*/
ve.dm.Surface.prototype.stopQueueingContextChanges = function () {
if ( this.queueingContextChanges ) {
this.queueingContextChanges = false;
if ( this.contextChangeQueued ) {
this.contextChangeQueued = false;
this.emit( 'contextChange' );
}
}
};
/**
* Set a linear selection at a specified range on the model
*
* @param {ve.Range} range Range to create linear selection at
*/
ve.dm.Surface.prototype.setLinearSelection = function ( range ) {
this.setSelection( new ve.dm.LinearSelection( range ) );
};
/**
* Set a null selection on the model
*/
ve.dm.Surface.prototype.setNullSelection = function () {
this.setSelection( new ve.dm.NullSelection() );
};
/**
* Grows a range so that any partially selected links are totally selected
*
* @param {ve.Range} range The range to regularize
* @return {ve.Range} Regularized range, possibly object-identical to the original
*/
ve.dm.Surface.prototype.fixupRangeForLinks = function ( range ) {
if ( range.isCollapsed() ) {
return range;
}
var linearData = this.getDocument().data;
function getLinks( offset ) {
return linearData.getAnnotationsFromOffset( offset ).filter( function ( ann ) {
return ann.name === 'link';
} );
}
// Search for links at start/end that don't cover the whole range.
// Assume at most one such link at each end.
var start = range.start;
var end = range.end;
var rangeAnnotations = linearData.getAnnotationsFromRange( range );
var startLink = getLinks( start ).diffWith( rangeAnnotations ).getHash( 0 );
var endLink = getLinks( end ).diffWith( rangeAnnotations ).getHash( 0 );
if ( startLink === undefined && endLink === undefined ) {
return range;
}
if ( startLink !== undefined ) {
while ( start > 0 && getLinks( start - 1 ).containsHash( startLink ) ) {
start--;
}
}
if ( endLink !== undefined ) {
while ( end < linearData.getLength() && getLinks( end ).containsHash( endLink ) ) {
end++;
}
}
if ( range.isBackwards() ) {
return new ve.Range( end, start );
} else {
return new ve.Range( start, end );
}
};
/**
* Change the selection
*
* @param {ve.dm.Selection} selection New selection
*
* @fires select
* @fires contextChange
*/
ve.dm.Surface.prototype.setSelection = function ( selection ) {
var oldSelection = this.selection;
var maxOffset;
if (
selection instanceof ve.dm.LinearSelection &&
( maxOffset = this.getDocument().getDocumentRange().end ) &&
maxOffset < selection.getRange().end
) {
// Selection is out of range
ve.error( 'Attempted to set an out of bounds selection: ' + JSON.stringify( selection ) + ', adjusting' );
// Fix up the selection so things don't break if the caller subsequently
// tries to use the selection
selection = new ve.dm.LinearSelection( new ve.Range(
Math.min( maxOffset, selection.getRange().start ),
maxOffset
) );
// TODO: Check table selections too
}
this.translatedSelection = null;
if ( this.transacting ) {
// Update the selection but don't do any processing
this.selection = selection;
return;
}
var selectionChange = false;
// this.selection needs to be updated before we call setInsertionAnnotations
if ( !oldSelection.equals( selection ) ) {
selectionChange = true;
this.selection = selection;
}
function intersectRanges( rangeA, rangeB ) {
var rangeStart = Math.max( rangeA.start, rangeB.start );
var rangeEnd = Math.min( rangeA.end, rangeB.end );
return new ve.Range(
rangeStart,
// If rangeStart > rangeEnd there is no overlap, just return
// a collapsed range at rangeStart (this shouldn't happen here)
Math.max( rangeStart, rangeEnd )
);
}
var range;
var selectedNode;
var branchNodes = {};
var contextChange = false;
if ( selection instanceof ve.dm.LinearSelection ) {
range = selection.getRange();
// Update branch nodes
branchNodes.start = this.getDocument().getBranchNodeFromOffset( range.start );
branchNodes.startRange = intersectRanges( branchNodes.start.getRange(), range );
if ( !range.isCollapsed() ) {
branchNodes.end = this.getDocument().getBranchNodeFromOffset( range.end );
branchNodes.endRange = intersectRanges( branchNodes.end.getRange(), range );
} else {
branchNodes.end = branchNodes.start;
branchNodes.endRange = branchNodes.startRange;
}
selectedNode = this.getSelectedNodeFromSelection( selection );
// Source mode optimization
if ( !this.sourceMode ) {
var linearData = this.getDocument().data;
// Reset insertionAnnotations based on the neighbouring document data
var insertionAnnotations = linearData.getInsertionAnnotationsFromRange( range );
// If there's *any* difference in insertion annotations (even order), then:
// * emit insertionAnnotationsChange
// * emit contextChange (TODO: is this desirable?)
if ( !insertionAnnotations.equalsInOrder( this.insertionAnnotations ) ) {
this.setInsertionAnnotations( insertionAnnotations );
}
var selectedAnnotations;
// Reset selectedAnnotations
if ( range.isCollapsed() ) {
selectedAnnotations = linearData.getAnnotationsFromOffset( range.start );
} else {
selectedAnnotations = linearData.getAnnotationsFromRange( range, true );
}
if ( !selectedAnnotations.compareTo( this.selectedAnnotations ) ) {
this.selectedAnnotations = selectedAnnotations;
contextChange = true;
}
// Did the annotations at the focus point of a non-collapsed selection
// change? (i.e. did the selection move in/out of an annotation as it
// expanded?)
if ( selectionChange && !range.isCollapsed() && oldSelection instanceof ve.dm.LinearSelection ) {
var rangeFocus = new ve.Range( range.to );
var oldRangeFocus = new ve.Range( oldSelection.getRange().to );
var focusRangeMovingBack = rangeFocus.to < oldRangeFocus.to;
// If we're moving back in the document, getInsertionAnnotationsFromRange
// needs to be told to fetch the annotations after the cursor, otherwise
// it'll trigger one position too soon.
if (
!linearData.getInsertionAnnotationsFromRange( rangeFocus, focusRangeMovingBack ).compareTo( linearData.getInsertionAnnotationsFromRange( oldRangeFocus, focusRangeMovingBack ) )
) {
contextChange = true;
}
}
}
} else if ( selection instanceof ve.dm.TableSelection ) {
selectedNode = selection.getMatrixCells( this.getDocument() )[ 0 ].node;
contextChange = true;
} else Eif ( selection.isNull() ) {
contextChange = true;
}
if ( range && range.isCollapsed() !== this.isCollapsed ) {
// selectedAnnotations won't have changed if going from insertion annotations to
// selection of the same annotations, but some tools will consider that a context change
// (e.g. ClearAnnotationTool).
this.isCollapsed = range.isCollapsed();
contextChange = true;
}
// If branchNodes or selectedNode changed emit a contextChange
if (
selectedNode !== this.selectedNode ||
branchNodes.start !== this.branchNodes.start ||
branchNodes.end !== this.branchNodes.end
) {
this.branchNodes = branchNodes;
this.selectedNode = selectedNode;
contextChange = true;
} else if (
branchNodes.startRange && this.branchNodes.startRange && (
branchNodes.startRange.isCollapsed() !== this.branchNodes.startRange.isCollapsed() ||
branchNodes.endRange.isCollapsed() !== this.branchNodes.endRange.isCollapsed()
)
) {
// If the collapsed-ness of the selection within an edge node changes, the result of
// ve.dm.Surface#getSelectedLeafNodes could change, so emit a contextChange
this.branchNodes = branchNodes;
contextChange = true;
}
// If selection changed emit a select
if ( selectionChange ) {
this.emit( 'select', this.selection );
if ( oldSelection.isNull() ) {
this.emit( 'focus' );
}
if ( selection.isNull() ) {
this.emit( 'blur' );
}
}
if ( contextChange ) {
this.emitContextChange();
}
};
/**
* Apply a transactions and selection changes to the document.
*
* @param {ve.dm.Transaction|ve.dm.Transaction[]|null} transactions One or more transactions to
* process, or null to process none
* @param {ve.dm.Selection} [selection] Selection to apply
* @fires contextChange
*/
ve.dm.Surface.prototype.change = function ( transactions, selection ) {
this.changeInternal( transactions, selection, false );
};
/**
* Internal implementation of change(). Do not use this, use change() instead.
*
* @private
* @param {ve.dm.Transaction|ve.dm.Transaction[]|null} transactions
* @param {ve.dm.Selection} [selection]
* @param {boolean} [skipUndoStack=false] If true, do not modify the undo stack. Used by undo/redo
* @fires select
* @fires history
* @fires contextChange
*/
ve.dm.Surface.prototype.changeInternal = function ( transactions, selection, skipUndoStack ) {
var selectionBefore = this.selection,
contextChange = false;
this.startQueueingContextChanges();
// Process transactions
if ( transactions && !this.readOnly ) {
if ( transactions instanceof ve.dm.Transaction ) {
transactions = [ transactions ];
}
this.transacting = true;
for ( var i = 0, len = transactions.length; i < len; i++ ) {
if ( !transactions[ i ].isNoOp() ) {
var committed;
// The .commit() call below indirectly invokes setSelection()
try {
committed = false;
this.getDocument().commit( transactions[ i ], this.isStaging() );
committed = true;
} finally {
if ( !committed ) {
this.stopQueueingContextChanges();
}
}
if ( !skipUndoStack ) {
if ( this.isStaging() ) {
if ( !this.getStagingTransactions().length ) {
this.getStaging().selectionBefore = selectionBefore;
}
this.getStagingTransactions().push( transactions[ i ] );
} else {
this.truncateUndoStack();
if ( !this.newTransactions.length ) {
this.selectionBefore = selectionBefore;
}
this.newTransactions.push( transactions[ i ] );
}
}
if ( transactions[ i ].hasElementAttributeOperations() ) {
contextChange = true;
}
}
}
this.transacting = false;
this.undoConflict = false;
this.emit( 'history' );
}
var selectionAfter = this.selection;
// Apply selection change
if ( selection ) {
this.setSelection( selection );
} else if ( transactions ) {
// Call setSelection() to trigger selection processing that was bypassed earlier
this.setSelection( this.selection );
}
// If the selection changed while applying the transactions but not while applying the
// selection change, setSelection() won't have emitted a 'select' event. We don't want that
// to happen, so emit one anyway.
if (
!selectionBefore.equals( selectionAfter ) &&
selectionAfter.equals( this.selection )
) {
this.emit( 'select', this.selection );
}
if ( contextChange ) {
this.emitContextChange();
}
this.stopQueueingContextChanges();
};
/**
* Set a history state breakpoint.
*
* @return {boolean} A breakpoint was added
* @fires undoStackChange
*/
ve.dm.Surface.prototype.breakpoint = function () {
Iif ( this.readOnly ) {
return false;
}
var breakpointSet = false;
this.resetHistoryTrackingInterval();
if ( this.newTransactions.length > 0 ) {
this.undoStack.push( {
start: this.getDocument().getCompleteHistoryLength() - this.newTransactions.length,
transactions: this.newTransactions,
selection: this.selection,
selectionBefore: this.selectionBefore
} );
this.newTransactions = [];
this.emit( 'undoStackChange' );
breakpointSet = true;
}
// Update selectionBefore even if nothing has changed
this.selectionBefore = this.selection;
return breakpointSet;
};
/**
* Step backwards in history.
*
* @fires undoStackChange
*/
ve.dm.Surface.prototype.undo = function () {
if ( !this.canUndo() ) {
return;
}
Iif ( this.isStaging() ) {
this.popAllStaging();
}
this.breakpoint();
this.undoIndex++;
var transactions = [];
var item;
if ( !this.isMultiUser() ) {
item = this.undoStack[ this.undoStack.length - this.undoIndex ];
Eif ( item ) {
// Apply reversed transactions in reversed order
for ( var i = item.transactions.length - 1; i >= 0; i-- ) {
var transaction = item.transactions[ i ].reversed();
transactions.push( transaction );
}
this.changeInternal( transactions, item.selectionBefore, true );
this.emit( 'undoStackChange' );
}
} else {
// Find the most recent stack item by this user
while ( this.undoIndex <= this.undoStack.length ) {
item = this.undoStack[ this.undoStack.length - this.undoIndex ];
// Assume every transaction in the stack item has the same author (see ve.dm.Change#applyTo)
var authorId = item.transactions[ 0 ].authorId;
if ( authorId === null || authorId === this.getAuthorId() ) {
break;
}
item = null;
this.undoIndex++;
}
if ( item ) {
var history = this.getDocument().getChangeSince( item.start + item.transactions.length );
var done = new ve.dm.Change(
item.start,
item.transactions,
item.transactions.map( function () {
// Undo cannot add store items, so we don't need to worry here
return new ve.dm.HashValueStore();
} ),
{}
);
var result = ve.dm.Change.static.rebaseUncommittedChange( history, done.reversed() );
Iif ( result.rejected ) {
// Rebasing conflict: move pointer back and don't try again until next transaction
this.undoIndex--;
this.undoConflict = true;
// Undo stack didn't change, but ability to undo did
this.emit( 'history' );
} else {
var selection = item.selectionBefore.translateByChange( result.transposedHistory );
// Undo cannot add store items, so we can safely apply just transactions
this.changeInternal( result.rebased.transactions, selection, true );
this.emit( 'undoStackChange' );
}
} else {
// Undo stack didn't change, but ability to undo did
this.emit( 'history' );
}
}
};
/**
* Step forwards in history.
*
* @fires undoStackChange
*/
ve.dm.Surface.prototype.redo = function () {
Iif ( !this.canRedo() ) {
return;
}
this.breakpoint();
var item = this.undoStack[ this.undoStack.length - this.undoIndex ];
Eif ( item ) {
this.undoIndex--;
// ve.copy( item.transactions ) invokes .clone() on each transaction in item.transactions
this.changeInternal( ve.copy( item.transactions ), item.selection, true );
this.emit( 'undoStackChange' );
}
};
/**
* Respond to transactions processed on the document by translating the selection and updating
* other state.
*
* @param {ve.dm.Transaction} tx Transaction that was processed
* @fires documentUpdate
*/
ve.dm.Surface.prototype.onDocumentTransact = function ( tx ) {
this.setSelection( this.getSelection().translateByTransactionWithAuthor( tx, this.authorId ) );
this.emit( 'documentUpdate', tx );
};
/**
* Get the cached selected node covering the current selection, or null
*
* @return {ve.dm.Node|null} Selected node
*/
ve.dm.Surface.prototype.getSelectedNode = function () {
return this.selectedNode;
};
/**
* Get the selected node covering a specific selection, or null
*
* @param {ve.dm.Selection} [selection] Selection, defaults to the current selection
* @return {ve.dm.Node|null} Selected node
*/
ve.dm.Surface.prototype.getSelectedNodeFromSelection = function ( selection ) {
selection = selection || this.getSelection();
Iif ( !( selection instanceof ve.dm.LinearSelection ) ) {
return null;
}
var selectedNode = null;
var range = selection.getRange();
if ( !range.isCollapsed() ) {
var startNode = this.getDocument().documentNode.getNodeFromOffset( range.start + 1 );
if ( startNode && startNode.getOuterRange().equalsSelection( range ) ) {
selectedNode = startNode;
}
}
return selectedNode;
};
/**
* Update translatedSelection early (before the commit actually occurs)
*
* This is so ve.ce.ContentBranchNode#getRenderedContents can consider the translated
* selection for unicorn rendering.
*
* @param {ve.dm.Transaction} tx Transaction that's about to be committed
*/
ve.dm.Surface.prototype.onDocumentPreCommit = function ( tx ) {
this.translatedSelection = this.selection.translateByTransaction( tx );
};
/**
* Get a minimal set of ranges which have been modified by changes to the surface.
*
* @param {Object} [options] Options
* @param {boolean} [options.includeCollapsed] Include collapsed ranges (removed content)
* @param {boolean} [options.includeInternalList] Include changes within the internal list
* @param {boolean} [options.excludeAnnotations] Exclude annotation-only changes
* @param {boolean} [options.excludeAttributes] Exclude attribute changes
* @return {ve.Range[]} Modified ranges
*/
ve.dm.Surface.prototype.getModifiedRanges = function ( options ) {
var doc = this.getDocument();
var ranges = [];
options = options || {};
this.getHistory().forEach( function ( stackItem ) {
stackItem.transactions.forEach( function ( tx ) {
var newRange = tx.getModifiedRange( doc, options );
// newRange will by null for no-ops
if ( newRange ) {
// Translate previous ranges by the current transaction
ranges.forEach( function ( range, i, arr ) {
arr[ i ] = tx.translateRange( range, true );
} );
if ( options.includeCollapsed || !newRange.isCollapsed() ) {
ranges.push( newRange );
}
}
} );
} );
// Merge adjacent ranges
var compactRanges = [];
var lastRange = null;
ranges
.sort( function ( a, b ) {
return a.start - b.start;
} )
.forEach( function ( range ) {
if ( options.includeCollapsed || !range.isCollapsed() ) {
if ( lastRange && lastRange.touchesRange( range ) ) {
compactRanges.pop();
range = lastRange.expand( range );
}
compactRanges.push( range );
lastRange = range;
}
} );
return compactRanges;
};
/**
* Get a VE source-mode surface offset from a plaintext source offset.
*
* @param {number} offset Source text offset
* @return {number} Surface offset
* @throws {Error} Offset out of bounds
*/
ve.dm.Surface.prototype.getOffsetFromSourceOffset = function ( offset ) {
if ( offset < 0 ) {
throw new Error( 'Offset out of bounds' );
}
var lineOffset = 0,
line = 0,
lines = this.getDocument().getDocumentNode().getChildren();
while ( lineOffset < offset + 1 ) {
if ( !lines[ line ] || lines[ line ].isInternal() ) {
throw new Error( 'Offset out of bounds' );
}
lineOffset += lines[ line ].getLength() + 1;
line++;
}
return offset + line;
};
/**
* Get a plaintext source offset from a VE source-mode surface offset.
*
* @param {number} offset Surface offset
* @return {number} Source text offset
* @throws {Error} Offset out of bounds
*/
ve.dm.Surface.prototype.getSourceOffsetFromOffset = function ( offset ) {
if ( offset < 0 ) {
throw new Error( 'Offset out of bounds' );
}
var lineOffset = 0,
line = 0,
lines = this.getDocument().getDocumentNode().getChildren();
while ( lineOffset < offset ) {
if ( !lines[ line ] || lines[ line ].isInternal() ) {
throw new Error( 'Offset out of bounds' );
}
lineOffset += lines[ line ].getOuterLength();
line++;
}
return offset - line;
};
/**
* Get a VE source-mode surface range from plaintext source offsets.
*
* @param {number} from Source text from offset
* @param {number} [to] Source text to offset, omit for a collapsed range
* @return {ve.Range} Source surface offset
*/
ve.dm.Surface.prototype.getRangeFromSourceOffsets = function ( from, to ) {
var fromOffset = this.getOffsetFromSourceOffset( from );
return new ve.Range(
fromOffset,
// Skip toOffset calculation if collapsed
to === undefined || to === from ?
fromOffset :
this.getOffsetFromSourceOffset( to )
);
};
/**
* Get the author ID
*
* @return {number} The author ID
*/
ve.dm.Surface.prototype.getAuthorId = function () {
return this.authorId;
};
/**
* Set the author ID
*
* @param {number} authorId The new author ID
*/
ve.dm.Surface.prototype.setAuthorId = function ( authorId ) {
this.authorId = authorId;
};
/**
* Store latest transactions into session storage
*/
ve.dm.Surface.prototype.storeChanges = function () {
if ( this.autosaveFailed ) {
return;
}
var dmDoc = this.getDocument();
var change = dmDoc.getChangeSince( this.lastStoredChange );
if ( !change.isEmpty() ) {
var changes = this.storage.getObject( this.autosavePrefix + 've-changes' ) || [];
changes.push( change );
if ( this.storage.setObject( this.autosavePrefix + 've-changes', changes, this.storageExpiry ) ) {
this.lastStoredChange = dmDoc.getCompleteHistoryLength();
this.storage.setObject( this.autosavePrefix + 've-selection', this.getSelection(), this.storageExpiry );
this.updateExpiry( [ 've-changes', 've-selection' ] );
} else {
// Auto-save failed probably because of memory limits
// so flag it so we don't keep trying in vain.
this.autosaveFailed = true;
this.emit( 'autosaveFailed' );
}
}
};
/**
* Store persistent document storage into session storage
*/
ve.dm.Surface.prototype.storeDocStorage = function () {
if ( this.autosaveFailed ) {
return;
}
var dmDoc = this.getDocument();
this.storage.setObject( this.autosavePrefix + 've-docstorage', dmDoc.getStorage(), this.storageExpiry );
this.updateExpiry( [ 've-docstorage' ] );
};
/**
* Set an document ID for autosave.
*
* For session storage this is only required if there is more
* than one document on the page.
*
* @param {string} docId Document ID.
*/
ve.dm.Surface.prototype.setAutosaveDocId = function ( docId ) {
this.autosavePrefix = docId + '/';
};
/**
* Set the storage interface for autosave
*
* @param {ve.init.ConflictableStorage} storage Storage interface
* @param {number} [storageExpiry] Storage expiry time in seconds
*/
ve.dm.Surface.prototype.setStorage = function ( storage, storageExpiry ) {
Iif ( this.storing ) {
throw new Error( 'Can\'t change storage interface after auto-save has stared' );
}
this.storage = storage;
this.storageExpiry = storageExpiry;
var isLocalStorage = false;
try {
// Accessing window.localStorage can throw an exception when it is disabled
// eslint-disable-next-line no-undef
isLocalStorage = this.storage.store === window.localStorage;
} catch ( e ) {}
Iif ( isLocalStorage ) {
var conflictableKeys = {};
conflictableKeys[ this.autosavePrefix + 've-docstate' ] = true;
conflictableKeys[ this.autosavePrefix + 've-dochtml' ] = true;
conflictableKeys[ this.autosavePrefix + 've-selection' ] = true;
conflictableKeys[ this.autosavePrefix + 've-changes' ] = true;
this.storage.addConflictableKeys( conflictableKeys );
}
};
/**
* Start storing changes after every undoStackChange
*/
ve.dm.Surface.prototype.startStoringChanges = function () {
this.storing = true;
this.on( 'undoStackChange', this.storeChangesListener );
this.getDocument().on( 'storage', this.storeDocStorageListener );
this.updateExpiry();
};
/**
* Stop storing changes
*/
ve.dm.Surface.prototype.stopStoringChanges = function () {
this.storing = false;
this.off( 'undoStackChange', this.storeChangesListener );
this.getDocument().off( 'storage', this.storeDocStorageListener );
};
/**
* Restore transactions from session storage
*
* @return {boolean} Some changes were restored
* @throws {Error} Failed to restore auto-saved session
*/
ve.dm.Surface.prototype.restoreChanges = function () {
var surface = this,
restored = false,
changes = this.storage.getObject( this.autosavePrefix + 've-changes' ) || [];
try {
changes.forEach( function ( data ) {
var change = ve.dm.Change.static.unsafeDeserialize( data );
change.applyTo( surface, true );
surface.breakpoint();
} );
restored = !!changes.length;
this.getDocument().setStorage(
this.storage.getObject( this.autosavePrefix + 've-docstorage' ) || {}
);
var selection;
try {
selection = ve.dm.Selection.static.newFromJSON(
this.storage.getObject( this.autosavePrefix + 've-selection' )
);
} catch ( e ) {
// Didn't restore the selection, not a big deal.
}
if ( selection ) {
// Wait for surface to observe selection change
setTimeout( function () {
surface.setSelection( selection );
} );
}
} catch ( e ) {
throw new Error( 'Failed to restore auto-saved session: ' + e );
}
this.lastStoredChange = this.getDocument().getCompleteHistoryLength();
return restored;
};
/**
* Store a snapshot of the current document state.
*
* If custom HTML is provided, the caller must manually set the
* lastStoredChange pointer to the correct value.
*
* @param {Object} [state] JSONable object describing document state
* @param {string} [html] Document HTML, will generate from current state if not provided
* @return {boolean} Doc state was successfully stored
*/
ve.dm.Surface.prototype.storeDocState = function ( state, html ) {
// Clear any changes that may have stored up to this point
this.removeDocStateAndChanges();
if ( state ) {
if ( !this.updateDocState( state ) ) {
this.stopStoringChanges();
return false;
}
}
var useLatestHtml = html === undefined;
// Store HTML separately to avoid wasteful JSON encoding
if ( !this.storage.set( this.autosavePrefix + 've-dochtml', useLatestHtml ? this.getHtml() : html, this.storageExpiry ) ) {
// If we failed to store the html, wipe the docstate
this.storage.remove( this.autosavePrefix + 've-docstate' );
this.stopStoringChanges();
return false;
}
this.updateExpiry( [ 've-dochtml' ] );
if ( useLatestHtml ) {
// If storing the latest HTML, reset the lastStoreChange pointer,
// otherwise assume this will be handled by the caller.
this.lastStoredChange = this.getDocument().getCompleteHistoryLength();
}
return true;
};
/**
* Update stored document state metadata, without changing the HTML
*
* @param {Object} state Document state
* @return {boolean} Document metadata was successfully stored
*/
ve.dm.Surface.prototype.updateDocState = function ( state ) {
if ( this.storage.set( this.autosavePrefix + 've-docstate', JSON.stringify( state ), this.storageExpiry ) ) {
this.updateExpiry( [ 've-docstate' ] );
return true;
}
return false;
};
/**
* Update the expiry value of keys in use
*
* @param {string[]} [skipKeys] Keys to skip (because they have just been updated)
*/
ve.dm.Surface.prototype.updateExpiry = function ( skipKeys ) {
Eif ( !this.storageExpiry ) {
return;
}
var surface = this;
skipKeys = skipKeys || [];
[ 've-docstate', 've-dochtml', 've-selection', 've-changes' ].forEach( function ( key ) {
if ( skipKeys.indexOf( key ) === -1 ) {
surface.storage.setExpires( surface.autosavePrefix + key, surface.storageExpiry );
}
} );
};
/**
* Remove the auto-saved document state and stashed changes
*/
ve.dm.Surface.prototype.removeDocStateAndChanges = function () {
this.storage.remove( this.autosavePrefix + 've-docstate' );
this.storage.remove( this.autosavePrefix + 've-dochtml' );
this.storage.remove( this.autosavePrefix + 've-selection' );
this.storage.remove( this.autosavePrefix + 've-changes' );
};
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