mirror of
https://gerrit.wikimedia.org/r/mediawiki/extensions/VisualEditor
synced 2024-11-15 18:39:52 +00:00
99 lines
2.5 KiB
JavaScript
99 lines
2.5 KiB
JavaScript
ve.ce.CursorObserver = function( documentView ) {
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// Inheritance
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ve.EventEmitter.call( this );
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this.documentView = documentView;
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this.anchorNode = null;
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this.anchorOffset = null;
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this.focusNode = null;
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this.focusOffset = null;
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};
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ve.ce.CursorObserver.prototype.update = function() {
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var _this = this;
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setTimeout( function() {
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if ( !_this.documentView.$.is(':focus') ) {
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if (
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_this.anchorNode !== null ||
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_this.anchorOffset !== null ||
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_this.focusNode !== null ||
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_this.focusOffset !== null
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) {
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_this.anchorNode = _this.anchorOffset = _this.focusNode = _this.focusOffset = null;
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_this.emit( 'change', null );
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}
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} else {
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var rangySel = rangy.getSelection(),
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range;
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if ( rangySel.anchorNode !== _this.anchorNode ||
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rangySel.anchorOffset !== _this.anchorOffset ||
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rangySel.focusNode !== _this.focusNode ||
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rangySel.focusOffset !== _this.focusOffset
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) {
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_this.anchorNode = rangySel.anchorNode;
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_this.anchorOffset = rangySel.anchorOffset;
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_this.focusNode = rangySel.focusNode;
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_this.focusOffset = rangySel.focusOffset;
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if ( rangySel.isCollapsed ) {
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range = new ve.Range( _this.getOffset( _this.anchorNode, _this.anchorOffset ) );
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} else {
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range = new ve.Range(
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_this.getOffset( _this.anchorNode, _this.anchorOffset ),
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_this.getOffset( _this.focusNode, _this.focusOffset )
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);
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}
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_this.emit( 'change', range );
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}
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}
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}, 0 );
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};
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ve.ce.CursorObserver.prototype.getOffset = function( selectionNode, selectionOffset ) {
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var $leafNode = ve.ce.Surface.getLeafNode( selectionNode ),
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current = [$leafNode.contents(), 0],
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stack = [current],
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offset = 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 === selectionNode ) {
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offset += selectionOffset;
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break;
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} else {
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offset += item.textContent.length;
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}
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} else if ( item.nodeType === 1 ) {
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if ( $( item ).attr( 'contentEditable' ) === 'false' ) {
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offset += 1;
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} else {
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if ( item === selectionNode ) {
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offset += selectionOffset;
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break;
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}
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stack.push( [$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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return this.documentView.getOffsetFromNode(
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$leafNode.data( 'view' )
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) + 1 + offset;
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};
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/* Inheritance */
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ve.extendClass( ve.ce.CursorObserver , ve.EventEmitter );
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