mirror of
https://gerrit.wikimedia.org/r/mediawiki/extensions/VisualEditor
synced 2024-11-26 07:15:32 +00:00
740 lines
20 KiB
JavaScript
740 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( $container, model ) {
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// Inheritance
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es.EventEmitter.call( this );
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// References for use in closures
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var _this = this,
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$document = $( document ),
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$window = $( window );
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// Properties
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this.model = model;
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this.currentSelection = new es.Range();
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this.documentView = new es.DocumentView( this.model.getDocument(), this );
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this.$ = $container
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.addClass( 'es-surfaceView' )
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.append( this.documentView.$ );
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this.$input = $( '<textarea class="es-surfaceView-textarea" />' )
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.prependTo( this.$ );
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this.$cursor = $( '<div class="es-surfaceView-cursor"></div>' )
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.appendTo( this.$ );
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// Interaction states
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/*
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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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*/
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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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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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this.dimensions = {
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width: this.$.width(),
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height: $window.height(),
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scrollTop: $window.scrollTop(),
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// XXX: This is a dirty hack!
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toolbarTop: $( '#es-toolbar' ).offset().top,
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toolbarHeight: $( '#es-toolbar' ).height()
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};
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// Events
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this.model.on( 'select', function( selection ) {
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// Keep a copy of the current selection on hand
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_this.currentSelection = selection.clone();
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// Respond to selection changes
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if ( selection.from !== selection.to ) {
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_this.hideCursor();
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} else {
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_this.showCursor();
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}
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_this.documentView.drawSelection( selection );
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} );
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this.model.getDocument().on( 'update', function() {
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_this.emit( 'update' );
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} );
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this.$.mousedown( function(e) {
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return _this.onMouseDown( e );
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} );
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this.$input.on( {
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'focus': function() {
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// Make sure we aren't double-binding
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$document.off( '.es-surfaceView' );
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// Bind mouse and key events to the document to ensure we don't miss anything
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$document.on( {
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'mousemove.es-surfaceView': function(e) {
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return _this.onMouseMove( e );
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},
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'mouseup.es-surfaceView': function(e) {
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return _this.onMouseUp( e );
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},
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'keydown.es-surfaceView': function( e ) {
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return _this.onKeyDown( e );
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},
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'keyup.es-surfaceView': function( e ) {
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return _this.onKeyUp( e );
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}
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} );
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},
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'blur': function( e ) {
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// Release our event handlers when not focused
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$document.off( '.es-surfaceView' );
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_this.hideCursor();
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}
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} );
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$window.resize( function() {
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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.hideCursor();
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_this.dimensions.height = $window.height();
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var width = _this.$.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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$window.scroll( function() {
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// FIXME: Is this code in the right place?
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_this.dimensions.scrollTop = $window.scrollTop();
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if ( _this.dimensions.scrollTop >= _this.dimensions.toolbarTop ) {
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$( '#es-toolbar' ).addClass( 'float' );
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$( '#es-panes' ).css( 'padding-top', _this.dimensions.toolbarHeight );
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} else {
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$( '#es-toolbar' ).removeClass( 'float' );
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$( '#es-panes' ).css( 'padding-top', 0 );
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}
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} );
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// Configuration
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this.mac = navigator.userAgent.match(/mac/i) ? true : false; // (yes it's evil, for keys only!)
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// Initialization
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this.$input.focus();
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this.documentView.renderContent();
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};
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/* Methods */
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es.SurfaceView.prototype.onMouseDown = function( e ) {
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// Only for left mouse button
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if ( e.button === 0 ) {
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var selection = this.currentSelection.clone(),
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offset = this.documentView.getOffsetFromEvent( e );
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// Single click
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if ( e.originalEvent.detail === 1 ) {
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// @see {es.SurfaceView.prototype.onMouseMove}
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this.mouse.selectingMode = 1;
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if ( this.keyboard.keys.shift && offset !== selection.from ) {
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// Extend current or create new selection
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selection.to = offset;
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} else {
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if ( selection.to !== 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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selection.from = 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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}
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// Double click
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else if ( e.originalEvent.detail === 2 ) {
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// @see {es.SurfaceView.prototype.onMouseMove}
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this.mouse.selectingMode = 2;
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var wordRange = this.model.getDocument().getWordBoundaries( offset );
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if( wordRange ) {
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selection = wordRange;
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this.mouse.selectedRange = selection.clone();
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}
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}
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// Triple click
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else if ( e.originalEvent.detail >= 3 ) {
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// @see {es.SurfaceView.prototype.onMouseMove}
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this.mouse.selectingMode = 3;
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var node = this.documentView.getNodeFromOffset( offset ),
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nodeOffset = this.documentView.getOffsetFromNode( node, false );
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selection.from = this.model.getDocument().getRelativeContentOffset( nodeOffset, 1 );
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selection.to = this.model.getDocument().getRelativeContentOffset(
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nodeOffset + node.getElementLength(), -1
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);
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this.mouse.selectedRange = selection.clone();
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}
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// Reset the initial left position
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this.cursor.initialLeft = null;
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// Apply new selection
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this.model.select( selection );
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}
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// If the inut isn't already focused, focus it and select it's contents
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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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return false;
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};
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es.SurfaceView.prototype.onMouseMove = function( e ) {
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// Only with the left mouse button while in selecting mode
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if ( e.button === 0 && this.mouse.selectingMode ) {
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var selection = this.currentSelection.clone(),
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offset = this.documentView.getOffsetFromEvent( e );
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// Character selection
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if ( this.mouse.selectingMode === 1 ) {
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selection.to = offset;
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}
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// Word selection
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else if ( this.mouse.selectingMode === 2 ) {
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var wordRange = this.model.getDocument().getWordBoundaries( offset );
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if ( wordRange ) {
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if ( wordRange.to <= this.mouse.selectedRange.from ) {
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selection.from = wordRange.from;
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selection.to = this.mouse.selectedRange.to;
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} else {
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selection.from = this.mouse.selectedRange.from;
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selection.to = wordRange.to;
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}
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}
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}
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// Node selection
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else if ( this.mouse.selectingMode === 3 ) {
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// @see {es.SurfaceView.prototype.onMouseMove}
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this.mouse.selectingMode = 3;
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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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selection.from = this.model.getDocument().getRelativeContentOffset(
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nodeRange.from, 1
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);
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selection.to = this.mouse.selectedRange.to;
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} else {
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selection.from = this.mouse.selectedRange.from;
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selection.to = this.model.getDocument().getRelativeContentOffset(
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nodeRange.to, -1
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);
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}
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}
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// Apply new selection
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this.model.select( selection, true );
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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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this.model.select( this.currentSelection );
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}
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};
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es.SurfaceView.prototype.onKeyDown = function( e ) {
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var _this = this;
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function handleInsert() {
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if ( _this.keyboard.keydownTimeout ) {
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clearTimeout( _this.keyboard.keydownTimeout );
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}
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_this.keyboard.keydownTimeout = setTimeout( function () {
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_this.insertFromInput();
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}, 10 );
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}
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switch ( e.keyCode ) {
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// Shift
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case 16:
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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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// Home
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case 36:
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this.moveCursor( 'left', 'line' );
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break;
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// End
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case 35:
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this.moveCursor( 'right', 'line' );
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break;
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// Left arrow
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case 37:
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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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// Up arrow
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case 38:
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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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// Right arrow
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case 39:
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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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// Down arrow
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case 40:
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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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// Backspace
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case 8:
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this.handleDelete( true );
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break;
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// Delete
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case 46:
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this.handleDelete();
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break;
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// Enter
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case 13:
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this.handleEnter();
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e.preventDefault();
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break;
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// U (soft undo/soft redo)
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case 85:
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if ( e.metaKey || e.ctrlKey ) {
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if ( this.keyboard.keys.shift ) {
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this.model.redo( 1 );
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} else {
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this.model.undo( 1 );
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}
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return false;
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}
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handleInsert();
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break;
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// Z (undo/redo)
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case 90:
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if ( e.metaKey || e.ctrlKey ) {
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if ( this.keyboard.keys.shift ) {
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this.model.redo( 1, true );
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} else {
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this.model.undo( 1, true );
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}
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return false;
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}
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handleInsert();
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break;
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// Insert content (maybe)
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default:
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handleInsert();
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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.handleDelete = function( backspace ) {
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var selection = this.currentSelection.clone(),
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sourceOffset,
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targetOffset,
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sourceSplitableNode,
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targetSplitableNode,
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tx;
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if ( selection.from === selection.to ) {
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if ( backspace ) {
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sourceOffset = selection.to;
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targetOffset = this.model.getDocument().getRelativeContentOffset(
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sourceOffset,
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-1
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);
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} else {
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sourceOffset = this.model.getDocument().getRelativeContentOffset(
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selection.to,
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1
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);
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targetOffset = selection.to;
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}
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var sourceNode = this.documentView.getNodeFromOffset( sourceOffset, false ),
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targetNode = this.documentView.getNodeFromOffset( targetOffset, false );
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if ( sourceNode.model.getElementType() === targetNode.model.getElementType() ) {
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sourceSplitableNode = es.DocumentViewNode.getSplitableNode( sourceNode );
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targetSplitableNode = es.DocumentViewNode.getSplitableNode( targetNode );
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}
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selection.from = selection.to = targetOffset;
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this.model.select( selection );
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if ( sourceNode === targetNode ||
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( typeof sourceSplitableNode !== 'undefined' &&
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sourceSplitableNode.getParent() === targetSplitableNode.getParent() ) ) {
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tx = this.model.getDocument().prepareRemoval(
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new es.Range( targetOffset, sourceOffset )
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);
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this.model.transact( tx );
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} else {
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tx = this.model.getDocument().prepareInsertion(
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targetOffset, sourceNode.model.getContent()
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);
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this.model.transact( 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 = node.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.model.getDocument().prepareRemoval( range );
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this.model.transact( tx );
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}
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} else {
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// selection removal
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tx = this.model.getDocument().prepareRemoval( selection );
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this.model.transact( tx );
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this.documentView.clearSelection();
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selection.from = selection.to = selection.start;
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this.model.select( selection );
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}
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};
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es.SurfaceView.prototype.handleEnter = function() {
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var selection = this.currentSelection.clone(),
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tx;
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if ( selection.from !== selection.to ) {
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this.handleDelete();
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}
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var node = this.documentView.getNodeFromOffset( selection.to, false ),
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nodeOffset = this.documentView.getOffsetFromNode( node, false );
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if (
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nodeOffset + node.getContentLength() + 1 === selection.to &&
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node === es.DocumentViewNode.getSplitableNode( node )
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) {
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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.model.transact( tx );
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selection.from = selection.to = nodeOffset + node.getElementLength() + 1;
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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 (
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splitable === true &&
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es.DocumentView.splitRules[ elementType ].children === true
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) {
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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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{
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'type': elementType,
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'attributes': es.copyObject( node.model.element.attributes )
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}
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);
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splitable = es.DocumentView.splitRules[ elementType ].self;
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} );
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tx = this.documentView.model.prepareInsertion( selection.to, stack );
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this.model.transact( tx );
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selection.from = selection.to =
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this.model.getDocument().getRelativeContentOffset( selection.to, 1 );
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}
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this.model.select( selection );
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};
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es.SurfaceView.prototype.insertFromInput = function() {
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var selection = this.currentSelection.clone(),
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val = this.$input.val();
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this.$input.val( '' );
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if ( val.length > 0 ) {
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var tx;
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if ( selection.from != selection.to ) {
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tx = this.model.getDocument().prepareRemoval( selection );
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this.model.transact( tx );
|
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this.documentView.clearSelection();
|
|
selection.from = selection.to =
|
|
Math.min( selection.from, selection.to );
|
|
}
|
|
tx = this.model.getDocument().prepareInsertion( selection.from, val.split('') );
|
|
this.model.transact( tx );
|
|
selection.from += val.length;
|
|
selection.to += val.length;
|
|
this.model.select( selection );
|
|
}
|
|
};
|
|
|
|
/**
|
|
* @param {String} direction up | down | left | right
|
|
* @param {String} unit char | word | line | node | page
|
|
*/
|
|
es.SurfaceView.prototype.moveCursor = function( direction, unit ) {
|
|
if ( direction !== 'up' && direction !== 'down' ) {
|
|
this.cursor.initialLeft = null;
|
|
}
|
|
var selection = this.currentSelection.clone(),
|
|
to,
|
|
offset;
|
|
switch ( direction ) {
|
|
case 'left':
|
|
case 'right':
|
|
switch ( unit ) {
|
|
case 'char':
|
|
case 'word':
|
|
if ( this.keyboard.keys.shift || selection.from === selection.to ) {
|
|
offset = selection.to;
|
|
} else {
|
|
offset = direction === 'left' ? selection.start : selection.end;
|
|
}
|
|
to = this.model.getDocument().getRelativeContentOffset(
|
|
offset,
|
|
direction === 'left' ? -1 : 1
|
|
);
|
|
if ( unit === 'word' ) {
|
|
var wordRange = this.model.getDocument().getWordBoundaries(
|
|
direction === 'left' ? to : offset
|
|
);
|
|
if ( wordRange ) {
|
|
to = direction === 'left' ? wordRange.start : wordRange.end;
|
|
}
|
|
}
|
|
break;
|
|
case 'line':
|
|
offset = this.cursor.initialBias ?
|
|
this.model.getDocument().getRelativeContentOffset(
|
|
selection.to,
|
|
-1) :
|
|
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.model.getDocument().traverseLeafNodes(
|
|
function( node ) {
|
|
if ( toNode === null) {
|
|
toNode = node;
|
|
} else {
|
|
toNode = node;
|
|
return false;
|
|
}
|
|
},
|
|
this.documentView.getNodeFromOffset( selection.to, false ).getModel(),
|
|
direction === 'up' ? true : false
|
|
);
|
|
to = this.model.getDocument().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(
|
|
selection.to,
|
|
this.cursor.initialBias
|
|
);
|
|
|
|
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;
|
|
|
|
this.cursor.initialBias = position.left > this.documentView.getNodeFromOffset(
|
|
selection.to, false
|
|
).contentView.$.offset().left;
|
|
|
|
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 ),
|
|
this.cursor.initialBias
|
|
);
|
|
fakePosition.left = this.cursor.initialLeft;
|
|
} while ( position.top === fakePosition.top );
|
|
to = this.documentView.getOffsetFromRenderedPosition( fakePosition );
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
|
|
if( direction != 'up' && direction != 'down' ) {
|
|
this.cursor.initialBias = direction === 'right' && unit === 'line' ? true : false;
|
|
}
|
|
|
|
if ( this.keyboard.keys.shift && selection.from !== to) {
|
|
selection.to = to;
|
|
} else {
|
|
if ( selection.from !== selection.to ) {
|
|
this.documentView.clearSelection();
|
|
}
|
|
selection.from = selection.to = to;
|
|
}
|
|
this.model.select( selection );
|
|
};
|
|
|
|
/**
|
|
* Shows the cursor in a new position.
|
|
*
|
|
* @method
|
|
* @param offset {Integer} Position to show the cursor at
|
|
*/
|
|
es.SurfaceView.prototype.showCursor = function() {
|
|
var $window = $( window ),
|
|
position = this.documentView.getRenderedPositionFromOffset(
|
|
this.currentSelection.to, this.cursor.initialBias
|
|
);
|
|
|
|
this.$cursor.css( {
|
|
'left': position.left,
|
|
'top': position.top,
|
|
'height': position.bottom - position.top
|
|
} ).show();
|
|
this.$input.css({
|
|
'top': position.top,
|
|
'height': position.bottom - position.top
|
|
});
|
|
|
|
// Auto scroll to cursor
|
|
var inputTop = this.$input.offset().top,
|
|
inputBottom = inputTop + position.bottom - position.top;
|
|
if ( inputTop - this.dimensions.toolbarHeight < this.dimensions.scrollTop ) {
|
|
$window.scrollTop( inputTop - this.dimensions.toolbarHeight );
|
|
} else if ( inputBottom > ( this.dimensions.scrollTop + this.dimensions.height ) ) {
|
|
$window.scrollTop( inputBottom - this.dimensions.height );
|
|
}
|
|
|
|
// cursor blinking
|
|
if ( this.cursor.interval ) {
|
|
clearInterval( this.cursor.interval );
|
|
}
|
|
|
|
var _this = this;
|
|
this.cursor.interval = setInterval( function( surface ) {
|
|
_this.$cursor.css( 'display', function( index, value ) {
|
|
return value === 'block' ? 'none' : 'block';
|
|
} );
|
|
}, 500 );
|
|
};
|
|
|
|
/**
|
|
* 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 ); |