mirror of
https://gerrit.wikimedia.org/r/mediawiki/extensions/VisualEditor
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159 lines
4 KiB
JavaScript
159 lines
4 KiB
JavaScript
/**
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* Creates an ve.dm.Surface object.
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*
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* @class
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* @constructor
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* @extends {ve.EventEmitter}
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* @param {ve.dm.DocumentNode} doc Document model to create surface for
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*/
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ve.dm.Surface = function( doc ) {
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// Inheritance
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ve.EventEmitter.call( this );
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// Properties
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this.doc = doc;
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this.selection = null;
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this.smallStack = [];
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this.bigStack = [];
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this.undoIndex = 0;
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var _this = this;
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setInterval( function () {
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_this.breakpoint();
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}, 750 );
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};
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/* Methods */
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ve.dm.Surface.prototype.purgeHistory = function() {
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this.selection = null;
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this.smallStack = [];
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this.bigStack = [];
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this.undoIndex = 0;
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};
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ve.dm.Surface.prototype.getHistory = function() {
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if ( this.smallStack.length > 0 ) {
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return this.bigStack.slice( 0 ).concat( [{ 'stack': this.smallStack.slice(0) }] );
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} else {
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return this.bigStack.slice( 0 );
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}
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};
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/**
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* Gets the document model of the surface.
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*
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* @method
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* @returns {ve.dm.DocumentNode} Document model of the surface
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*/
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ve.dm.Surface.prototype.getDocument = function() {
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return this.doc;
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};
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/**
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* Gets the selection
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*
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* @method
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* @returns {ve.Range} Current selection
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*/
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ve.dm.Surface.prototype.getSelection = function() {
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return this.selection;
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};
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/**
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* Changes the selection.
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*
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* If changing the selection at a high frequency (such as while dragging) use the combine argument
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* to avoid them being split up into multiple history items
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*
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* @method
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* @param {ve.Range} selection
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* @param {Boolean} isManual Whether this selection was the result of a user action, and thus should
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* be recorded in history...?
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*/
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ve.dm.Surface.prototype.select = function( selection, isManual ) {
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selection.normalize();
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/*if (
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( ! this.selection ) || ( ! this.selection.equals( selection ) )
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) {*/
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if ( isManual ) {
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this.breakpoint();
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}
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// check if the last thing is a selection, if so, swap it.
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this.selection = selection;
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this.emit( 'select', this.selection.clone() );
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//}
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};
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/**
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* Applies a series of transactions to the content data.
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*
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* If committing multiple transactions which are the result of a single user action and need to be
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* part of a single history item, use the isPartial argument for all but the last one to avoid them
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* being split up into multple history items.
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*
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* @method
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* @param {ve.dm.Transaction} transactions Tranasction to apply to the document
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* @param {boolean} isPartial whether this transaction is part of a larger logical grouping of
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* transactions (such as when replacing - delete, then insert)
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*/
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ve.dm.Surface.prototype.transact = function( transaction ) {
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this.bigStack = this.bigStack.slice( 0, this.bigStack.length - this.undoIndex );
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this.undoIndex = 0;
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this.smallStack.push( transaction );
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this.doc.commit( transaction );
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this.emit( 'transact', transaction );
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};
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ve.dm.Surface.prototype.breakpoint = function( selection ) {
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if( this.smallStack.length > 0 ) {
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this.bigStack.push( {
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stack: this.smallStack,
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selection: selection || this.selection.clone()
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} );
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this.smallStack = [];
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}
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};
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ve.dm.Surface.prototype.undo = function() {
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this.breakpoint();
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this.undoIndex++;
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if ( this.bigStack[this.bigStack.length - this.undoIndex] ) {
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var diff = 0;
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var item = this.bigStack[this.bigStack.length - this.undoIndex];
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for( var i = item.stack.length - 1; i >= 0; i-- ) {
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this.doc.rollback( item.stack[i] );
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diff += item.stack[i].lengthDifference;
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}
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var selection = item.selection;
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selection.from -= diff;
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selection.to -= diff;
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this.select( selection );
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}
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};
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ve.dm.Surface.prototype.redo = function() {
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this.breakpoint();
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if ( this.undoIndex > 0 ) {
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if ( this.bigStack[this.bigStack.length - this.undoIndex] ) {
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var diff = 0;
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var item = this.bigStack[this.bigStack.length - this.undoIndex];
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for( var i = 0; i < item.stack.length; i++ ) {
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this.doc.commit( item.stack[i] );
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diff += item.stack[i].lengthDifference;
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}
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var selection = item.selection;
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selection.from += diff;
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selection.to += diff;
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this.selection = null;
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this.select( selection );
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}
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this.undoIndex--;
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}
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};
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/* Inheritance */
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ve.extendClass( ve.dm.Surface, ve.EventEmitter );
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