mirror of
https://gerrit.wikimedia.org/r/mediawiki/extensions/VisualEditor
synced 2024-11-16 02:51:50 +00:00
662 lines
20 KiB
JavaScript
662 lines
20 KiB
JavaScript
/**
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* Creates an es.SurfaceView 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 {es.SurfaceModel} model Surface model to view
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*/
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es.SurfaceView = function( $container, model ) {
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// References for use in closures
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var _this = this,
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$document = $( document );
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es.EventEmitter.call( this );
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this.$ = $container.addClass( 'es-surfaceView' );
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this.$window = $( window );
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this.model = model;
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this.selection = new es.Range();
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// Mac uses different mapping for keyboard shortcuts
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this.mac = navigator.userAgent.match(/mac/i) ? true : false;
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this.model.getDocument().on( 'update', function() {
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_this.emit( 'update' );
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} );
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this.previousSelection = null;
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this.emitSelect = function() {
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if ( _this.previousSelection ) {
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if (
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_this.previousSelection.from !== _this.selection.from ||
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_this.previousSelection.to !== _this.selection.to
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) {
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_this.emit( 'select', _this.selection.clone() );
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_this.previousSelection = _this.selection.clone();
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}
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// Mouse movement that doesn't change selection points will terminate here
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} else {
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_this.previousSelection = _this.selection.clone();
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}
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};
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// Initialize document view
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this.documentView = new es.DocumentView( this.model.getDocument(), this );
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this.$.append( this.documentView.$ );
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// Interaction state
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// There are three different selection modes available for mouse. Selection of:
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// * 1 - chars
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// * 2 - words
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// * 3 - nodes (e.g. paragraph, listitem)
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//
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// In case of 2 and 3 selectedRange stores the range of original selection caused by double
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// or triple mousedowns.
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this.mouse = {
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selectingMode: null,
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selectedRange: null
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};
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this.cursor = {
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$: $( '<div class="es-surfaceView-cursor"></div>' ).appendTo( this.$ ),
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interval: null,
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initialLeft: null,
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initialBias: false
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};
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this.keyboard = {
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selecting: false,
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cursorAnchor: null,
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keydownTimeout: null,
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keys: { shift: false }
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};
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// MouseDown and DoubleClick on surface
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this.$.on( {
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'mousedown' : function(e) {
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return _this.onMouseDown( e );
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}
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} );
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// Hidden input
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this.$input = $( '<textarea class="es-surfaceView-textarea" />' )
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.prependTo( this.$ )
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.on( {
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'focus' : function() {
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$document.off( '.es-surfaceView' );
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$document.on({
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'mousemove.es-surfaceView': function(e) {
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return _this.onMouseMove( e );
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},
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'mouseup.es-surfaceView': function(e) {
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return _this.onMouseUp( e );
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},
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'keydown.es-surfaceView': function( e ) {
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return _this.onKeyDown( e );
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},
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'keyup.es-surfaceView': function( e ) {
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return _this.onKeyUp( e );
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}
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});
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},
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'blur': function( e ) {
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$document.off( '.es-surfaceView' );
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_this.hideCursor();
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}
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} ).focus();
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// First render
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this.documentView.renderContent();
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this.dimensions = {
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width: this.$.width(),
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height: this.$window.height(),
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scrollTop: this.$window.scrollTop()
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};
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// Re-render when resizing horizontally
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// TODO: Instead of re-rendering on every single 'resize' event wait till user is done with
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// resizing - can be implemented with setTimeout
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this.$window.resize( function() {
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_this.hideCursor();
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_this.dimensions.height = _this.$window.height();
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var width = _this.$.width();
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if ( _this.dimensions.width !== width ) {
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_this.dimensions.width = width;
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_this.documentView.renderContent();
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}
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} );
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this.$window.scroll( function() {
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_this.dimensions.scrollTop = _this.$window.scrollTop();
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} );
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};
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/* Methods */
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es.SurfaceView.prototype.onMouseDown = function( e ) {
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if ( e.button === 0 ) { // left mouse button
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var offset = this.documentView.getOffsetFromEvent( e );
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if ( e.originalEvent.detail === 1 ) { // single click
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this.mouse.selectingMode = 1; // used in mouseMove handler
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if ( this.keyboard.keys.shift && offset !== this.selection.from ) {
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// extend current or create new selection
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this.selection.to = offset;
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} else {
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if ( this.selection.to !== this.selection.from ) {
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// clear the selection if there was any
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this.documentView.clearSelection();
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}
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this.selection.from = this.selection.to = offset;
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var position = es.Position.newFromEventPagePosition( e ),
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nodeView = this.documentView.getNodeFromOffset( offset, false );
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this.cursor.initialBias = position.left > nodeView.contentView.$.offset().left;
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}
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} else if ( e.originalEvent.detail === 2 ) { // double click
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this.mouse.selectingMode = 2; // used in mouseMove handler
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var wordRange = this.documentView.model.getWordBoundaries( offset );
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if( wordRange ) {
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this.selection = wordRange;
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this.mouse.selectedRange = this.selection.clone();
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}
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} else if ( e.originalEvent.detail >= 3 ) { // triple click
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this.mouse.selectingMode = 3; // used in mouseMove handler
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var node = this.documentView.getNodeFromOffset( offset ),
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nodeOffset = this.documentView.getOffsetFromNode( node, false );
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this.selection.from = this.documentView.getModel().getRelativeContentOffset( nodeOffset, 1 );
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this.selection.to = this.documentView.getModel().getRelativeContentOffset( nodeOffset + node.getElementLength(), -1 );
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this.mouse.selectedRange = this.selection.clone();
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}
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if ( this.selection.from === this.selection.to ) {
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this.showCursor();
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} else {
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this.hideCursor();
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this.documentView.drawSelection( this.selection );
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}
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}
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if ( !this.$input.is( ':focus' ) ) {
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this.$input.focus().select();
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}
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this.cursor.initialLeft = null;
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this.emitSelect();
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return false;
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};
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es.SurfaceView.prototype.onMouseMove = function( e ) {
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if ( e.button === 0 && this.mouse.selectingMode ) { // left mouse button and in selecting mode
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var offset = this.documentView.getOffsetFromEvent( e );
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if ( this.mouse.selectingMode === 1 ) { // selection of chars
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this.selection.to = offset;
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} else if ( this.mouse.selectingMode === 2 ) { // selection of words
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var wordRange = this.documentView.model.getWordBoundaries( offset );
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if ( wordRange ) {
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if ( wordRange.to <= this.mouse.selectedRange.from ) {
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this.selection.to = wordRange.from;
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this.selection.from = this.mouse.selectedRange.to;
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} else {
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this.selection.to = wordRange.to;
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this.selection.from = this.mouse.selectedRange.from;
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}
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} else {
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this.selection.to = offset;
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}
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} else if ( this.mouse.selectingMode === 3 ) {
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this.mouse.selectingMode = 3; // used in mouseMove handler
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var nodeRange = this.documentView.getRangeFromNode(
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this.documentView.getNodeFromOffset( offset )
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);
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if ( nodeRange.to <= this.mouse.selectedRange.from ) {
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this.selection.to = this.documentView.getModel().getRelativeContentOffset( nodeRange.from, 1 );
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this.selection.from = this.mouse.selectedRange.to;
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} else {
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this.selection.to = this.documentView.getModel().getRelativeContentOffset( nodeRange.to, -1 );
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this.selection.from = this.mouse.selectedRange.from;
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}
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}
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this.documentView.drawSelection( this.selection );
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if ( this.selection.from !== this.selection.to ) {
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this.hideCursor();
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}
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}
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};
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es.SurfaceView.prototype.onMouseUp = function( e ) {
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if ( e.button === 0 ) { // left mouse button
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this.mouse.selectingMode = this.mouse.selectedRange = null;
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}
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};
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es.SurfaceView.prototype.onKeyDown = function( e ) {
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this.selection.normalize();
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switch ( e.keyCode ) {
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case 16: // Shift
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this.keyboard.keys.shift = true;
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this.keyboard.selecting = true;
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break;
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case 36: // Home
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this.moveCursor( 'left', 'line' );
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break;
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case 35: // End
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this.moveCursor( 'right', 'line' );
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break;
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case 37: // Left arrow
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if ( !this.mac ) {
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if ( e.ctrlKey ) {
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this.moveCursor( 'left', 'word' );
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} else {
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this.moveCursor( 'left', 'char' );
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}
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} else {
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if ( e.metaKey || e.ctrlKey ) {
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this.moveCursor( 'left', 'line' );
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} else if ( e.altKey ) {
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this.moveCursor( 'left', 'word' );
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} else {
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this.moveCursor( 'left', 'char' );
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}
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}
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break;
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case 38: // Up arrow
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if ( !this.mac ) {
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if ( e.ctrlKey ) {
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this.moveCursor( 'up', 'unit' );
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} else {
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this.moveCursor( 'up', 'char' );
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}
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} else {
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if ( e.altKey ) {
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this.moveCursor( 'up', 'unit' );
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} else {
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this.moveCursor( 'up', 'char' );
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}
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}
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break;
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case 39: // Right arrow
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if ( !this.mac ) {
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if ( e.ctrlKey ) {
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this.moveCursor( 'right', 'word' );
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} else {
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this.moveCursor( 'right', 'char' );
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}
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} else {
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if ( e.metaKey || e.ctrlKey ) {
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this.moveCursor( 'right', 'line' );
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} else if ( e.altKey ) {
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this.moveCursor( 'right', 'word' );
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} else {
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this.moveCursor( 'right', 'char' );
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}
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}
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break;
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case 40: // Down arrow
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if ( !this.mac ) {
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if ( e.ctrlKey ) {
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this.moveCursor( 'down', 'unit' );
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} else {
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this.moveCursor( 'down', 'char' );
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}
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} else {
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if ( e.altKey ) {
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this.moveCursor( 'down', 'unit' );
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} else {
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this.moveCursor( 'down', 'char' );
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}
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}
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break;
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case 8: // Backspace
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if ( this.selection.from === this.selection.to ) {
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var sourceOffset = this.selection.to,
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targetOffset = this.documentView.getModel().getRelativeContentOffset( sourceOffset, -1),
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sourceNode = this.documentView.getNodeFromOffset( sourceOffset, false ),
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targetNode = this.documentView.getNodeFromOffset( targetOffset, false ),
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sourceSplitableNode = es.DocumentViewNode.getSplitableNode( sourceNode ),
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targetSplitableNode = es.DocumentViewNode.getSplitableNode( targetNode );
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if ( sourceNode === targetNode || ( sourceNode.model.getElementType() === targetNode.model.getElementType() && sourceSplitableNode.getParent() === targetSplitableNode.getParent() ) ) {
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this.selection.from = this.selection.to = targetOffset;
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this.showCursor();
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var tx = this.documentView.model.prepareRemoval(
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new es.Range( targetOffset, sourceOffset )
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);
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this.documentView.model.commit ( tx );
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} else {
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this.selection.from = this.selection.to = targetOffset;
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this.showCursor();
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var tx = this.documentView.model.prepareInsertion(
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targetOffset, sourceNode.model.getContent()
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);
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this.documentView.model.commit( tx );
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var nodeToDelete = sourceNode;
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es.DocumentNode.traverseUpstream( nodeToDelete, function( node ) {
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if ( node.getParent().children.length === 1 ) {
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nodeToDelete = sourceNode.getParent();
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} else {
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return false;
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}
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} );
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var range = new es.Range();
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range.from = this.documentView.getOffsetFromNode( nodeToDelete, false );
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range.to = range.from + nodeToDelete.getElementLength();
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tx = this.documentView.model.prepareRemoval( range );
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this.documentView.model.commit ( tx );
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}
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} else {
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var tx = this.documentView.model.prepareRemoval( this.selection );
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this.documentView.model.commit( tx );
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this.documentView.clearSelection();
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this.selection.from = this.selection.to = Math.min( this.selection.from, this.selection.to );
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this.showCursor();
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}
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break;
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case 46: // Delete
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if ( this.selection.from === this.selection.to ) {
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var sourceOffset = this.documentView.getModel().getRelativeContentOffset( this.selection.to, 1),
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targetOffset = this.selection.to,
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sourceNode = this.documentView.getNodeFromOffset( sourceOffset, false ),
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targetNode = this.documentView.getNodeFromOffset( targetOffset, false ),
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sourceSplitableNode = es.DocumentViewNode.getSplitableNode( sourceNode ),
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targetSplitableNode = es.DocumentViewNode.getSplitableNode( targetNode );
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if ( sourceNode === targetNode /*|| ( sourceNode.model.getElementType() === targetNode.model.getElementType() && sourceSplitableNode.getParent() === targetSplitableNode.getParent() ) */) {
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var tx = this.documentView.model.prepareRemoval(
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new es.Range( targetOffset, sourceOffset )
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);
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this.documentView.model.commit ( tx );
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} else {
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this.selection.from = this.selection.to = targetOffset;
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this.showCursor();
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var tx = this.documentView.model.prepareInsertion(
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targetOffset, sourceNode.model.getContent()
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);
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this.documentView.model.commit( tx );
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var nodeToDelete = sourceNode;
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es.DocumentNode.traverseUpstream( nodeToDelete, function( node ) {
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if ( node.getParent().children.length === 1 ) {
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nodeToDelete = nodeToDelete.getParent();
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} else {
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return false;
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}
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} );
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var range = new es.Range();
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range.from = this.documentView.getOffsetFromNode( nodeToDelete, false );
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range.to = range.from + nodeToDelete.getElementLength();
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tx = this.documentView.model.prepareRemoval( range );
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this.documentView.model.commit ( tx );
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}
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} else {
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var tx = this.documentView.model.prepareRemoval( this.selection );
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this.documentView.model.commit( tx );
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this.documentView.clearSelection();
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this.selection.from = this.selection.to = Math.min( this.selection.from, this.selection.to );
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this.showCursor();
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}
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break;
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case 13: // Enter
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if ( this.selection.from === this.selection.to ) {
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var node = this.documentView.getNodeFromOffset( this.selection.to, false ),
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nodeOffset = this.documentView.getOffsetFromNode( node, false );
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if ( nodeOffset + node.getContentLength() + 1 === this.selection.to && node === es.DocumentViewNode.getSplitableNode( node ) ) {
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var tx = this.documentView.model.prepareInsertion(
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nodeOffset + node.getElementLength(),
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[ { 'type': 'paragraph' }, { 'type': '/paragraph' } ]
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);
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this.documentView.model.commit( tx );
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this.selection.from = this.selection.to = nodeOffset + node.getElementLength() + 1;
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this.showCursor();
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} else {
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var stack = [],
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splitable = false;
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es.DocumentNode.traverseUpstream( node, function( node ) {
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var elementType = node.model.getElementType();
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if ( splitable === true && es.DocumentView.splitRules[ elementType ].children === true ) {
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return false;
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}
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stack.splice(
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stack.length / 2,
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0,
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{ 'type': '/' + elementType },
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{ 'type': elementType, 'attributes': es.copyObject( node.model.element.attributes ) }
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);
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splitable = es.DocumentView.splitRules[ elementType ].self;
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} );
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var tx = this.documentView.model.prepareInsertion( this.selection.to, stack );
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this.documentView.model.commit( tx );
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this.selection.from = this.selection.to = this.documentView.getModel().getRelativeContentOffset( this.selection.to, 1 );
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this.showCursor();
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}
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}
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e.preventDefault();
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break;
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default: // Insert content (maybe)
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if ( this.keyboard.keydownTimeout ) {
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clearTimeout( this.keyboard.keydownTimeout );
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}
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var surface = this;
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this.keyboard.keydownTimeout = setTimeout( function () {
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surface.insertFromInput();
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}, 10 );
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break;
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}
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return true;
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};
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es.SurfaceView.prototype.onKeyUp = function( e ) {
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switch ( e.keyCode ) {
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case 16: // Shift
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this.keyboard.keys.shift = false;
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if ( this.keyboard.selecting ) {
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this.keyboard.selecting = false;
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}
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break;
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default:
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break;
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}
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return true;
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};
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es.SurfaceView.prototype.insertFromInput = function() {
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var val = this.$input.val();
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this.$input.val( '' );
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if ( val.length > 0 ) {
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if ( this.selection.from != this.selection.to ) {
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var tx = this.documentView.model.prepareRemoval( this.selection );
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this.documentView.model.commit( tx );
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this.documentView.clearSelection();
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this.selection.from = this.selection.to = Math.min( this.selection.from, this.selection.to );
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}
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var tx = this.documentView.model.prepareInsertion( this.selection.from, val.split('') );
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this.documentView.model.commit ( tx );
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this.selection.from += val.length;
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this.selection.to += val.length;
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this.showCursor();
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}
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};
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/**
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* @param {String} direction up | down | left | right
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* @param {String} unit char | word | line | node | page
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*/
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es.SurfaceView.prototype.moveCursor = function( direction, unit ) {
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if ( direction !== 'up' && direction !== 'down' ) {
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this.cursor.initialLeft = null;
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}
|
|
|
|
var to;
|
|
|
|
switch ( direction ) {
|
|
case 'left':
|
|
case 'right':
|
|
switch ( unit ) {
|
|
case 'char':
|
|
case 'word':
|
|
var offset;
|
|
if ( this.keyboard.keys.shift || this.selection.from === this.selection.to ) {
|
|
offset = this.selection.to;
|
|
} else {
|
|
offset = direction === 'left' ? this.selection.start : this.selection.end;
|
|
}
|
|
to = this.documentView.getModel().getRelativeContentOffset(
|
|
offset,
|
|
direction === 'left' ? -1 : 1
|
|
);
|
|
if ( unit === 'word' ) {
|
|
var wordRange = this.documentView.model.getWordBoundaries(
|
|
direction === 'left' ? to : offset
|
|
);
|
|
if ( wordRange ) {
|
|
to = direction === 'left' ? wordRange.start : wordRange.end;
|
|
}
|
|
}
|
|
break;
|
|
case 'line':
|
|
var offset = this.cursor.initialBias ?
|
|
this.documentView.getModel().getRelativeContentOffset(
|
|
this.selection.to,
|
|
-1) :
|
|
this.selection.to;
|
|
var range = this.documentView.getRenderedLineRangeFromOffset( offset );
|
|
to = direction === 'left' ? range.start : range.end;
|
|
break;
|
|
}
|
|
break;
|
|
case 'up':
|
|
case 'down':
|
|
switch ( unit ) {
|
|
case 'unit':
|
|
var toNode = null;
|
|
this.documentView.model.traverseLeafNodes(
|
|
function( node ) {
|
|
if ( toNode === null) {
|
|
toNode = node;
|
|
} else {
|
|
toNode = node;
|
|
return false;
|
|
}
|
|
},
|
|
this.documentView.getNodeFromOffset( this.selection.to, false ).getModel(),
|
|
direction === 'up' ? true : false
|
|
);
|
|
to = this.documentView.model.getOffsetFromNode( toNode, false ) + 1;
|
|
break;
|
|
case 'char':
|
|
/*
|
|
* Looks for the in-document character position that would match up with the
|
|
* same horizontal position - jumping a few pixels up/down at a time until we
|
|
* reach the next/previous line
|
|
*/
|
|
var position = this.documentView.getRenderedPositionFromOffset(
|
|
this.selection.to
|
|
);
|
|
if ( this.cursor.initialLeft === null ) {
|
|
this.cursor.initialLeft = position.left;
|
|
}
|
|
var fakePosition = new es.Position( this.cursor.initialLeft, position.top ),
|
|
i = 0,
|
|
step = direction === 'up' ? -5 : 5,
|
|
top = this.$.position().top;
|
|
do {
|
|
fakePosition.top += ++i * step;
|
|
if ( fakePosition.top < top ) {
|
|
break;
|
|
} else if (fakePosition.top > top + this.dimensions.height + this.dimensions.scrollTop ) {
|
|
break;
|
|
}
|
|
fakePosition = this.documentView.getRenderedPositionFromOffset(
|
|
this.documentView.getOffsetFromRenderedPosition( fakePosition )
|
|
);
|
|
fakePosition.left = this.cursor.initialLeft;
|
|
} while ( position.top === fakePosition.top );
|
|
to = this.documentView.getOffsetFromRenderedPosition( fakePosition );
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
|
|
this.cursor.initialBias = direction === 'right' && unit === 'line' ? true : false;
|
|
|
|
if ( this.keyboard.keys.shift && this.selection.from !== to) {
|
|
this.selection.to = to;
|
|
this.documentView.drawSelection( this.selection );
|
|
this.hideCursor();
|
|
} else {
|
|
if ( this.selection.from !== this.selection.to ) {
|
|
this.documentView.clearSelection();
|
|
}
|
|
this.selection.from = this.selection.to = to;
|
|
this.showCursor();
|
|
}
|
|
this.emitSelect();
|
|
};
|
|
|
|
/**
|
|
* Shows the cursor in a new position.
|
|
*
|
|
* @method
|
|
* @param offset {Integer} Position to show the cursor at
|
|
*/
|
|
es.SurfaceView.prototype.showCursor = function() {
|
|
var position = this.documentView.getRenderedPositionFromOffset(
|
|
this.selection.to, this.cursor.initialBias
|
|
);
|
|
this.cursor.$.css( {
|
|
'left': position.left,
|
|
'top': position.top,
|
|
'height': position.bottom - position.top
|
|
} ).show();
|
|
this.$input.css({
|
|
'top': position.top,
|
|
'height': position.bottom - position.top
|
|
});
|
|
|
|
// cursor blinking
|
|
if ( this.cursor.interval ) {
|
|
clearInterval( this.cursor.interval );
|
|
}
|
|
this.cursor.interval = setInterval( function( surface ) {
|
|
surface.cursor.$.css( 'display', function( index, value ) {
|
|
return value === 'block' ? 'none' : 'block';
|
|
} );
|
|
}, 500, this );
|
|
};
|
|
|
|
/**
|
|
* Hides the cursor.
|
|
*
|
|
* @method
|
|
*/
|
|
es.SurfaceView.prototype.hideCursor = function() {
|
|
if( this.cursor.interval ) {
|
|
clearInterval( this.cursor.interval );
|
|
}
|
|
this.cursor.$.hide();
|
|
};
|
|
|
|
/* Inheritance */
|
|
|
|
es.extendClass( es.SurfaceView, es.EventEmitter ); |