mirror of
https://gerrit.wikimedia.org/r/mediawiki/extensions/VisualEditor
synced 2024-09-27 04:06:51 +00:00
356 lines
9.8 KiB
JavaScript
356 lines
9.8 KiB
JavaScript
/**
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* Creates an ve.es.Surface object.
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*
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* @class
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* @constructor
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* @param {jQuery} $container DOM Container to render surface into
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* @param {ve.dm.Surface} model Surface model to view
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*/
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ve.es.Surface = function( $container, model ) {
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// Inheritance
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ve.EventEmitter.call( this );
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// References for use in closures
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var _this = this,
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$document = $( document ),
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$window = $( window );
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// Properties
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this.model = model;
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this.documentView = new ve.es.DocumentNode( this.model.getDocument(), this );
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this.contextView = null;
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this.$ = $container
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.addClass( 'es-surfaceView' )
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.append( this.documentView.$ );
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this.emitUpdateTimeout = undefined;
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// Events
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this.documentView.$.bind( {
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'focus': function( e ) {
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_this.documentOnFocus();
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$document.unbind( '.ce-surfaceView' );
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$document.bind( {
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'keydown.ce-surfaceView': function( e ) {
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// return _this.onKeyDown( e );
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},
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} );
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},
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'blur': function( e ) {
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_this.documentOnBlur();
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$document.unbind( '.ce-surfaceView' );
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}
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} );
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this.$.mousedown( function(e) {
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// return _this.onMouseDown( e );
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} );
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// Initialization
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this.documentView.renderContent();
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// Prevent dragging text
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this.$.bind('dragover drop', function(e) {
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e.preventDefault();
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});
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this.poll = {
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interval: null,
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frequency: 100,
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node: null,
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prevText: null,
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prevHash: null,
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prevOffset: null,
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compositionStart: null,
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compositionEnd: null
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};
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document.addEventListener( 'compositionstart', function( e ) {
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_this.onCompositionStart( e );
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} );
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document.addEventListener( 'compositionend', function( e ) {
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_this.onCompositionEnd( e );
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} );
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};
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/* Methods */
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ve.es.Surface.prototype.onCompositionStart = function( e ) {
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this.stopPolling();
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var rangySel = rangy.getSelection();
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this.poll.compositionStart = this.getOffset( rangySel.anchorNode, rangySel.anchorOffset, false );
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};
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ve.es.Surface.prototype.onCompositionEnd = function( e ) {
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var rangySel = rangy.getSelection();
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this.poll.compositionEnd = this.getOffset( rangySel.focusNode, rangySel.focusOffset, false );
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this.startPolling();
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};
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ve.es.Surface.prototype.attachContextView = function( contextView ) {
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this.contextView = contextView;
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};
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ve.es.Surface.prototype.getModel = function() {
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return this.model;
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};
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ve.es.Surface.prototype.documentOnFocus = function() {
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this.startPolling();
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};
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ve.es.Surface.prototype.documentOnBlur = function() {
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this.stopPolling();
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};
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ve.es.Surface.prototype.startPolling = function() {
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if ( this.poll.interval === null ) {
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var _this = this;
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this.poll.interval = setInterval( function() {
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_this.pollContent();
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}, this.poll.frequency );
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this.pollContent();
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}
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};
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ve.es.Surface.prototype.stopPolling = function() {
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if ( this.poll.interval !== null ) {
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clearInterval( this.poll.interval );
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this.poll.interval = null;
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}
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};
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ve.es.Surface.prototype.pollContent = function() {
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if ( this.poll.compositionStart !== null && this.poll.compositionEnd !== null ) {
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var text = ve.es.Surface.getDOMText2( this.poll.node ),
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hash = ve.es.Surface.getDOMHash( this.poll.node ),
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localOffset = this.poll.compositionEnd;
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this.poll.compositionStart = null;
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this.poll.compositionEnd = null;
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} else {
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var rangySel = rangy.getSelection();
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if ( rangySel.anchorNode === null ) {
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return;
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}
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var node = this.getLeafNode( rangySel.anchorNode )[0],
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text = ve.es.Surface.getDOMText2( node ),
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hash = ve.es.Surface.getDOMHash( node );
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if ( rangySel.anchorNode !== rangySel.focusNode || rangySel.anchorOffset !== rangySel.focusOffset ) {
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var localOffset = null;
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} else {
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var localOffset = this.getOffset( rangySel.anchorNode, rangySel.anchorOffset, false );
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}
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if ( node !== this.poll.node ) {
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this.poll.node = node;
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this.poll.prevText = text;
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this.poll.prevHash = hash;
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this.poll.prevOffset = localOffset;
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return;
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}
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}
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if ( text !== this.poll.prevText ) {
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var nodeOffset = this.documentView.getOffsetFromNode( $( this.poll.node ).data( 'view' ) ),
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lengthDiff = text.length - this.poll.prevText.length,
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offsetDiff = ( localOffset !== null && this.poll.prevOffset !== null ) ? localOffset - this.poll.prevOffset : null;
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if ( lengthDiff === offsetDiff && this.poll.prevText.substring( 0, this.poll.prevOffset ) === text.substring( 0, this.poll.prevOffset ) ) {
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var newData = text.substring( this.poll.prevOffset, localOffset ).split( '' );
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var annotations = this.model.getDocument().getAnnotationsFromOffset( nodeOffset + 1 + this.poll.prevOffset - 1 );
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ve.dm.DocumentNode.addAnnotationsToData( newData, annotations );
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this.model.transact( this.documentView.model.prepareInsertion(
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nodeOffset + 1 + this.poll.prevOffset,
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newData
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) );
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} else {
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var sameFromLeft = 0,
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sameFromRight = 0,
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l = text.length > this.poll.prevText.length ? this.poll.prevText.length : text.length;
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while ( sameFromLeft < l && this.poll.prevText[sameFromLeft] == text[sameFromLeft] ) {
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++sameFromLeft;
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}
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l = l - sameFromLeft;
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while ( sameFromRight < l && this.poll.prevText[this.poll.prevText.length - 1 - sameFromRight] == text[text.length - 1 - sameFromRight] ) {
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++sameFromRight;
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}
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this.model.transact( this.documentView.model.prepareRemoval( new ve.Range(
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nodeOffset + 1 + sameFromLeft,
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nodeOffset + 1 + this.poll.prevText.length - sameFromRight
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) ) );
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var newData = text.substring( sameFromLeft, text.length - sameFromRight ).split( '' );
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var annotations = this.model.getDocument().getAnnotationsFromOffset( nodeOffset + 1 + sameFromLeft - 1 );
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ve.dm.DocumentNode.addAnnotationsToData( newData, annotations );
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this.model.transact( this.documentView.model.prepareInsertion(
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nodeOffset + 1 + sameFromLeft,
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newData
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) );
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}
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this.poll.prevText = text;
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}
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if ( hash !== this.poll.prevHash ) {
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// TODO: redisplay cursor in correct position (with setTimeout)
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this.getLeafNode( this.poll.node ).data( 'view' ).renderContent();
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this.poll.prevHash = hash;
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}
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this.poll.prevOffset = localOffset;
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};
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ve.es.Surface.prototype.getOffset = function( elem, offset, global ) {
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var $leafNode = this.getLeafNode( elem ),
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current = [$leafNode.contents(), 0],
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stack = [current],
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localOffset = 0;
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while ( stack.length > 0 ) {
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if ( current[1] >= current[0].length ) {
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stack.pop();
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current = stack[ stack.length - 1 ];
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continue;
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}
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var item = current[0][current[1]];
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var $item = current[0].eq( current[1] );
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if ( item.nodeType === 3 ) {
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if ( item === elem ) {
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localOffset += offset;
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break;
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} else {
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localOffset += item.textContent.length;
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}
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} else if ( item.nodeType === 1 ) {
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if ( $( item ).attr( 'contentEditable' ) === "false" ) {
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offset += 1;
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} else {
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if ( item === elem ) {
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localOffset += offset;
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break;
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}
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stack.push( [$item.contents(), 0] );
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current[1]++;
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current = stack[stack.length-1];
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continue;
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}
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}
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current[1]++;
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}
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if ( global === true ) {
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return this.documentView.getOffsetFromNode( $leafNode.data( 'view' ) ) + 1 + localOffset;
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} else {
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return localOffset;
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}
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};
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ve.es.Surface.prototype.showCursorAt = function( offset ) {
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var $node = this.documentView.getNodeFromOffset( offset ).$;
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var current = [$node.contents(), 0];
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var stack = [current];
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var node;
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var localOffset;
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var index = 1 + this.documentView.getOffsetFromNode( $node.data('view') );
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while ( stack.length > 0 ) {
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if ( current[1] >= current[0].length ) {
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stack.pop();
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current = stack[ stack.length - 1 ];
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continue;
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}
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var item = current[0][current[1]];
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var $item = current[0].eq( current[1] );
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if ( item.nodeType === 3 ) {
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var length = item.textContent.length;
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if ( offset >= index && offset <= index + length ) {
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node = item;
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localOffset = offset - index;
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break;
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} else {
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index += length;
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}
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} else if ( item.nodeType === 1 ) {
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if ( $( item ).attr('contentEditable') === "false" ) {
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index += 1;
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} else {
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stack.push( [$item.contents(), 0] );
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current[1]++;
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current = stack[stack.length-1];
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continue;
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}
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}
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current[1]++;
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}
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var range = document.createRange();
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range.collapsed = true;
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range.setStart(node, localOffset);
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var sel = window.getSelection();
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sel.removeAllRanges();
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sel.addRange(range);
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};
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ve.es.Surface.prototype.getLeafNode = function( elem ) {
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var $node = $( elem );
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while( !$node.hasClass( 'ce-leafNode' ) ) {
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$node = $node.parent();
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}
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return $node;
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};
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ve.es.Surface.getDOMText2 = function( elem ) {
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// TODO: there must be some better way to write this regex replace
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var regex = new RegExp("[" + String.fromCharCode(32) + String.fromCharCode(160) + "]", "g");
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return ve.es.Surface.getDOMText( elem ).replace( regex, " " );
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};
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ve.es.Surface.getDOMText = function( elem ) {
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var nodeType = elem.nodeType,
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ret = '';
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if ( nodeType === 1 || nodeType === 9 ) {
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// Use textContent || innerText for elements
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if ( typeof elem.textContent === 'string' ) {
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return elem.textContent;
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} else if ( typeof elem.innerText === 'string' ) {
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// Replace IE's carriage returns
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return elem.innerText.replace( /\r\n/g, '' );
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} else {
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// Traverse it's children
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for ( elem = elem.firstChild; elem; elem = elem.nextSibling) {
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ret += ve.es.Surface.getDOMText( elem );
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}
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}
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} else if ( nodeType === 3 || nodeType === 4 ) {
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return elem.nodeValue;
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}
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return ret;
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};
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ve.es.Surface.getDOMHash = function( elem ) {
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var nodeType = elem.nodeType,
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nodeName = elem.nodeName,
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ret = '';
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if ( nodeType === 3 || nodeType === 4 ) {
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return '#';
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} else if ( nodeType === 1 || nodeType === 9 ) {
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ret += '<' + nodeName + '>';
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for ( elem = elem.firstChild; elem; elem = elem.nextSibling) {
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ret += ve.es.Surface.getDOMHash( elem );
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}
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ret += '</' + nodeName + '>';
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}
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return ret;
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};
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/* Inheritance */
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ve.extendClass( ve.es.Surface, ve.EventEmitter );
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