From: Aleksander Łukasz Date: Fri, 12 Jul 2013 11:22:11 +0000 (+0200) Subject: Canvas.getCursor() X-Git-Url: https://git.mdrn.pl/fnpeditor.git/commitdiff_plain/1c409979eddd9cd58c1efe2705328c91c95c592b Canvas.getCursor() --- diff --git a/modules/documentCanvas/canvas/canvas.js b/modules/documentCanvas/canvas/canvas.js index c4bfc09..e6b8135 100644 --- a/modules/documentCanvas/canvas/canvas.js +++ b/modules/documentCanvas/canvas/canvas.js @@ -120,7 +120,12 @@ $.extend(Canvas.prototype, { return documentElement.wrap(from, this); } }, - list: {} + getCursor: function() { + return new Cursor(this); + }, + + list: {}, + }); $.extend(Canvas.prototype.list, { @@ -253,6 +258,89 @@ $.extend(Canvas.prototype.list, { } }); + +var Cursor = function(canvas) { + this.canvas = canvas; +}; + +$.extend(Cursor.prototype, { + isSelecting: function() { + var selection = window.getSelection(); + return !selection.isCollapsed; + }, + isSelectingWithinElement: function() { + return this.isSelecting() && this.getSelectionStart().element.sameNode(this.getSelectionEnd().element); + }, + isSelectingSiblings: function() { + return this.isSelecting() && this.getSelectionStart().element.parent().sameNode(this.getSelectionEnd().element.parent()); + }, + getPosition: function() { + return this.getSelectionAnchor(); + }, + getSelectionStart: function() { + return this.getSelectionBoundry('start'); + }, + getSelectionEnd: function() { + return this.getSelectionBoundry('end'); + }, + getSelectionAnchor: function() { + return this.getSelectionBoundry('anchor'); + }, + getSelectionBoundry: function(which) { + var selection = window.getSelection(), + anchorElement = this.canvas.getDocumentElement(selection.anchorNode), + focusElement = this.canvas.getDocumentElement(selection.focusNode); + + if(which === 'anchor') { + return { + element: anchorElement, + offset: selection.anchorOffset + }; + } + + var element, + offset; + + if(anchorElement.parent().sameNode(focusElement.parent())) { + var parent = anchorElement.parent(), + anchorFirst = parent.childIndex(anchorElement) < parent.childIndex(focusElement); + if(anchorFirst) { + if(which === 'start') { + element = anchorElement; + offset = selection.anchorOffset; + } + else if(which === 'end') { + element = focusElement, + offset = selection.focusOffset; + } + } else { + if(which === 'start') { + element = focusElement, + offset = selection.focusOffset + } + else if(which === 'end') { + element = anchorElement; + offset = selection.anchorOffset; + } + } + } else { + // TODO: Handle order + if(which === 'start') { + element = anchorElement; + offset = selection.anchorOffset + } else { + element = focusElement; + offset = selection.focusOffset + } + } + + return { + element: element, + offset: offset + } + } +}) + return { fromXML: function(xml) { return new Canvas(xml); diff --git a/modules/documentCanvas/canvas/canvas.test3.js b/modules/documentCanvas/canvas/canvas.test3.js index 9aab247..56665d4 100644 --- a/modules/documentCanvas/canvas/canvas.test3.js +++ b/modules/documentCanvas/canvas/canvas.test3.js @@ -1,8 +1,9 @@ define([ 'libs/chai', +'libs/sinon', 'modules/documentCanvas/canvas/canvas', 'modules/documentCanvas/canvas/documentElement' -], function(chai, canvas, documentElement) { +], function(chai, sinon, canvas, documentElement) { 'use strict'; @@ -864,6 +865,107 @@ describe('Canvas', function() { }); }); + + describe('Cursor', function() { + + var getSelection; + + beforeEach(function() { + getSelection = sinon.stub(window, 'getSelection'); + }); + + afterEach(function() { + getSelection.restore(); + }); + + it('returns position when browser selection collapsed', function() { + var c = canvas.fromXML('
Alice has a cat
'), + dom = c.doc().dom(), + text = dom.contents(0); + + expect(text.text()).to.equal('Alice has a cat'); + + getSelection.returns({ + anchorNode: text[0], + focusNode: text[0], + anchorOffset: 5, + focusOffset: 5, + isCollapsed: true + }); + var cursor = c.getCursor(), + position = cursor.getPosition(); + + expect(cursor.isSelecting()).to.equal(false, 'cursor is not selecting anything'); + //expect(cursor.getElement().getText()) + expect(position.element.getText()).to.equal('Alice has a cat'); + expect(position.offset).to.equal(5); + }); + + it('returns boundries of selection when browser selection not collapsed', function() { + var c = canvas.fromXML('
Alice has a big cat
'), + dom = c.doc().dom(), + text = { + alice: dom.contents()[0], + has: $(dom.contents()[1]).contents()[0], + cat: dom.contents()[4] + }, + cursor = c.getCursor(), + aliceElement = c.getDocumentElement(text.alice), + catElement = c.getDocumentElement(text.cat); + + + [ + {focus: text.alice, focusOffset: 1, anchor: text.cat, anchorOffset: 2, selectionAnchor: catElement}, + {focus: text.cat, focusOffset: 2, anchor: text.alice, anchorOffset: 1, selectionAnchor: aliceElement} + ].forEach(function(s, idx) { + getSelection.returns({isColapsed: false, anchorNode: s.anchor, anchorOffset: s.anchorOffset, focusNode: s.focus, focusOffset: s.focusOffset}); + + var selectionStart = cursor.getSelectionStart(), + selectionEnd = cursor.getSelectionEnd(), + selectionAnchor = cursor.getSelectionAnchor(); + + expect(cursor.isSelecting()).to.equal(true, 'cursor is selecting'); + expect(selectionStart.element.sameNode(aliceElement)).to.equal(true, '"Alice" is the start of the selection ' + idx); + expect(selectionStart.offset).to.equal(1, '"Alice" offset ok' + idx); + expect(selectionEnd.element.sameNode(catElement)).to.equal(true, '"Cat" is the start of the selection ' + idx); + expect(selectionEnd.offset).to.equal(2, '"Cat" offset ok' + idx); + expect(selectionAnchor.element.sameNode(s.selectionAnchor)).to.equal(true, 'anchor ok'); + expect(selectionAnchor.offset).to.equal(s.anchorOffset, 'anchor offset ok'); + }); + }); + + it('recognizes when browser selection boundries lies in sibling DocumentTextElements', function() { + var c = canvas.fromXML('
Alice has a big cat
'), + dom = c.doc().dom(), + text = { + alice: dom.contents()[0], + has: $(dom.contents()[1]).contents()[0], + a: dom.contents()[2], + big: $(dom.contents()[3]).contents()[0], + cat: dom.contents()[4] + }, + cursor = c.getCursor(); + + expect($(text.alice).text()).to.equal('Alice '); + expect($(text.has).text()).to.equal('has'); + expect($(text.a).text()).to.equal(' a '); + expect($(text.big).text()).to.equal('big'); + expect($(text.cat).text()).to.equal(' cat'); + + getSelection.returns({anchorNode: text.alice, focusNode: text.a}); + expect(cursor.isSelectingSiblings()).to.equal(true, '"Alice" and "a" are children'); + + getSelection.returns({anchorNode: text.alice, focusNode: text.cat}); + expect(cursor.isSelectingSiblings()).to.equal(true, '"Alice" and "cat" are children'); + + getSelection.returns({anchorNode: text.alice, focusNode: text.has}); + expect(cursor.isSelectingSiblings()).to.equal(false, '"Alice" and "has" are not children'); + + getSelection.returns({anchorNode: text.has, focusNode: text.big}); + expect(cursor.isSelectingSiblings()).to.equal(false, '"has" and "big" are not children'); + + }) + }); });