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- /**
- * @license Copyright (c) 2003-2017, CKSource - Frederico Knabben. All rights reserved.
- * For licensing, see LICENSE.md.
- */
- /* global document, Text */
- import global from '../../src/dom/global';
- import testUtils from '@ckeditor/ckeditor5-core/tests/_utils/utils';
- import isRange from '../../src/dom/isrange';
- import scrollUtils from '../../src/dom/scroll';
- const {
- scrollViewportToShowTarget,
- scrollAncestorsToShowTarget
- } = scrollUtils;
- testUtils.createSinonSandbox();
- describe( 'scrollAncestorsToShowTarget()', () => {
- let target, element, firstAncestor, secondAncestor, body;
- beforeEach( () => {
- element = document.createElement( 'p' );
- firstAncestor = document.createElement( 'blockquote' );
- secondAncestor = document.createElement( 'div' );
- body = document.createElement( 'div' );
- testUtils.sinon.stub( global, 'document', { body } );
- document.body.appendChild( body );
- body.appendChild( secondAncestor );
- secondAncestor.appendChild( firstAncestor );
- firstAncestor.appendChild( element );
- stubRect( firstAncestor, {
- top: 0, right: 100, bottom: 100, left: 0, width: 100, height: 100
- }, {
- scrollLeft: 100, scrollTop: 100
- } );
- stubRect( secondAncestor, {
- top: -100, right: 0, bottom: 0, left: -100, width: 100, height: 100
- }, {
- scrollLeft: 100, scrollTop: 100
- } );
- stubRect( body, {
- top: 1000, right: 2000, bottom: 1000, left: 1000, width: 1000, height: 1000
- }, {
- scrollLeft: 1000, scrollTop: 1000
- } );
- } );
- afterEach( () => {
- body.remove();
- } );
- describe( 'for an HTMLElement', () => {
- beforeEach( () => {
- target = element;
- } );
- test();
- } );
- describe( 'for a DOM Range', () => {
- beforeEach( () => {
- target = document.createRange();
- target.setStart( firstAncestor, 0 );
- target.setEnd( firstAncestor, 0 );
- } );
- test();
- it( 'should set #scrollTop and #scrollLeft of the ancestor to show the target (above, attached to the Text)', () => {
- const text = new Text( 'foo' );
- firstAncestor.appendChild( text );
- target.setStart( text, 1 );
- target.setEnd( text, 2 );
- stubRect( target, { top: -100, right: 75, bottom: 0, left: 25, width: 50, height: 100 } );
- scrollAncestorsToShowTarget( target );
- assertScrollPosition( firstAncestor, { scrollTop: 0, scrollLeft: 100 } );
- } );
- } );
- function test() {
- it( 'should not touch the #scrollTop #scrollLeft of the ancestor if target is visible', () => {
- stubRect( target, { top: 25, right: 75, bottom: 75, left: 25, width: 50, height: 50 } );
- scrollAncestorsToShowTarget( target );
- assertScrollPosition( firstAncestor, { scrollLeft: 100, scrollTop: 100 } );
- } );
- it( 'should not touch the #scrollTop #scrollLeft of the document.body', () => {
- stubRect( target, { top: 25, right: 75, bottom: 75, left: 25, width: 50, height: 50 } );
- scrollAncestorsToShowTarget( target );
- assertScrollPosition( body, { scrollLeft: 1000, scrollTop: 1000 } );
- } );
- it( 'should set #scrollTop and #scrollLeft of the ancestor to show the target (above)', () => {
- stubRect( target, { top: -100, right: 75, bottom: 0, left: 25, width: 50, height: 100 } );
- scrollAncestorsToShowTarget( target );
- assertScrollPosition( firstAncestor, { scrollTop: 0, scrollLeft: 100 } );
- } );
- it( 'should set #scrollTop and #scrollLeft of the ancestor to show the target (below)', () => {
- stubRect( target, { top: 200, right: 75, bottom: 300, left: 25, width: 50, height: 100 } );
- scrollAncestorsToShowTarget( target );
- assertScrollPosition( firstAncestor, { scrollTop: 300, scrollLeft: 100 } );
- } );
- it( 'should set #scrollTop and #scrollLeft of the ancestor to show the target (left of)', () => {
- stubRect( target, { top: 0, right: 0, bottom: 100, left: -100, width: 100, height: 100 } );
- scrollAncestorsToShowTarget( target );
- assertScrollPosition( firstAncestor, { scrollTop: 100, scrollLeft: 0 } );
- } );
- it( 'should set #scrollTop and #scrollLeft of the ancestor to show the target (right of)', () => {
- stubRect( target, { top: 0, right: 200, bottom: 100, left: 100, width: 100, height: 100 } );
- scrollAncestorsToShowTarget( target );
- assertScrollPosition( firstAncestor, { scrollTop: 100, scrollLeft: 200 } );
- } );
- it( 'should set #scrollTop and #scrollLeft of all the ancestors', () => {
- stubRect( target, { top: 0, right: 200, bottom: 100, left: 100, width: 100, height: 100 } );
- scrollAncestorsToShowTarget( target );
- assertScrollPosition( firstAncestor, { scrollTop: 100, scrollLeft: 200 } );
- // Note: Because everything is a mock, scrolling the firstAncestor doesn't really change
- // the getBoundingClientRect geometry of the target. That's why scrolling secondAncestor
- // works like the target remained in the original position and hence scrollLeft is 300 instead
- // of 200.
- assertScrollPosition( secondAncestor, { scrollTop: 200, scrollLeft: 300 } );
- } );
- }
- } );
- describe( 'scrollViewportToShowTarget()', () => {
- let target, firstAncestor, element;
- const viewportOffset = 30;
- beforeEach( () => {
- element = document.createElement( 'p' );
- firstAncestor = document.createElement( 'blockquote' );
- document.body.appendChild( firstAncestor );
- firstAncestor.appendChild( element );
- stubRect( firstAncestor, {
- top: 0, right: 100, bottom: 100, left: 0, width: 100, height: 100
- }, {
- scrollLeft: 100, scrollTop: 100
- } );
- testUtils.sinon.stub( global, 'window', {
- innerWidth: 1000,
- innerHeight: 500,
- scrollX: 100,
- scrollY: 100,
- scrollTo: sinon.spy(),
- getComputedStyle: () => ( {
- borderTopWidth: '0px',
- borderRightWidth: '0px',
- borderBottomWidth: '0px',
- borderLeftWidth: '0px'
- } )
- } );
- // Assuming 20px v- and h-scrollbars here.
- testUtils.sinon.stub( global, 'document', {
- body: document.body,
- documentElement: {
- clientWidth: 980,
- clientHeight: 480
- }
- } );
- } );
- afterEach( () => {
- firstAncestor.remove();
- } );
- describe( 'for an HTMLElement', () => {
- beforeEach( () => {
- target = element;
- } );
- testNoOffset();
- describe( 'with a viewportOffset', () => {
- testWithOffset();
- } );
- } );
- describe( 'for a DOM Range', () => {
- beforeEach( () => {
- target = document.createRange();
- target.setStart( firstAncestor, 0 );
- target.setEnd( firstAncestor, 0 );
- } );
- testNoOffset();
- describe( 'with a viewportOffset', () => {
- testWithOffset();
- } );
- } );
- // Note: Because everything is a mock, scrolling the firstAncestor doesn't really change
- // the getBoundingClientRect geometry of the target. That's why scrolling the viewport
- // works like the target remained in the original position. It's tricky but much faster
- // and still shows that the whole thing works as expected.
- //
- // Note: Negative scrollTo arguments make no sense in reality, but in mocks with arbitrary
- // initial geometry and scroll position they give the right, relative picture of what's going on.
- function testNoOffset() {
- it( 'does not scroll the viewport when the target is fully visible', () => {
- stubRect( target, { top: 0, right: 200, bottom: 100, left: 100, width: 100, height: 100 } );
- scrollViewportToShowTarget( { target } );
- assertScrollPosition( firstAncestor, { scrollTop: 100, scrollLeft: 200 } );
- sinon.assert.notCalled( global.window.scrollTo );
- } );
- it( 'scrolls the viewport to show the target (above)', () => {
- stubRect( target, { top: -200, right: 200, bottom: -100, left: 100, width: 100, height: 100 } );
- scrollViewportToShowTarget( { target } );
- assertScrollPosition( firstAncestor, { scrollTop: -100, scrollLeft: 200 } );
- sinon.assert.calledWithExactly( global.window.scrollTo, 100, -100 );
- } );
- it( 'scrolls the viewport to show the target (partially above)', () => {
- stubRect( target, { top: -50, right: 200, bottom: 50, left: 100, width: 100, height: 100 } );
- scrollViewportToShowTarget( { target } );
- assertScrollPosition( firstAncestor, { scrollTop: 50, scrollLeft: 200 } );
- sinon.assert.calledWithExactly( global.window.scrollTo, 100, 50 );
- } );
- it( 'scrolls the viewport to show the target (below)', () => {
- stubRect( target, { top: 600, right: 200, bottom: 700, left: 100, width: 100, height: 100 } );
- scrollViewportToShowTarget( { target } );
- assertScrollPosition( firstAncestor, { scrollTop: 700, scrollLeft: 200 } );
- sinon.assert.calledWithExactly( global.window.scrollTo, 100, 320 );
- } );
- it( 'scrolls the viewport to show the target (partially below)', () => {
- stubRect( target, { top: 450, right: 200, bottom: 550, left: 100, width: 100, height: 100 } );
- scrollViewportToShowTarget( { target } );
- assertScrollPosition( firstAncestor, { scrollTop: 550, scrollLeft: 200 } );
- sinon.assert.calledWithExactly( global.window.scrollTo, 100, 170 );
- } );
- it( 'scrolls the viewport to show the target (to the left)', () => {
- stubRect( target, { top: 0, right: -100, bottom: 100, left: -200, width: 100, height: 100 } );
- scrollViewportToShowTarget( { target } );
- assertScrollPosition( firstAncestor, { scrollTop: 100, scrollLeft: -100 } );
- sinon.assert.calledWithExactly( global.window.scrollTo, -100, 100 );
- } );
- it( 'scrolls the viewport to show the target (partially to the left)', () => {
- stubRect( target, { top: 0, right: 50, bottom: 100, left: -50, width: 100, height: 100 } );
- scrollViewportToShowTarget( { target } );
- assertScrollPosition( firstAncestor, { scrollTop: 100, scrollLeft: 50 } );
- sinon.assert.calledWithExactly( global.window.scrollTo, 50, 100 );
- } );
- it( 'scrolls the viewport to show the target (to the right)', () => {
- stubRect( target, { top: 0, right: 1200, bottom: 100, left: 1100, width: 100, height: 100 } );
- scrollViewportToShowTarget( { target } );
- assertScrollPosition( firstAncestor, { scrollTop: 100, scrollLeft: 1200 } );
- sinon.assert.calledWithExactly( global.window.scrollTo, 320, 100 );
- } );
- it( 'scrolls the viewport to show the target (partially to the right)', () => {
- stubRect( target, { top: 0, right: 1050, bottom: 100, left: 950, width: 100, height: 100 } );
- scrollViewportToShowTarget( { target } );
- assertScrollPosition( firstAncestor, { scrollTop: 100, scrollLeft: 1050 } );
- sinon.assert.calledWithExactly( global.window.scrollTo, 170, 100 );
- } );
- }
- // Note: Because everything is a mock, scrolling the firstAncestor doesn't really change
- // the getBoundingClientRect geometry of the target. That's why scrolling the viewport
- // works like the target remained in the original position. It's tricky but much faster
- // and still shows that the whole thing works as expected.
- //
- // Note: Negative scrollTo arguments make no sense in reality, but in mocks with arbitrary
- // initial geometry and scroll position they give the right, relative picture of what's going on.
- function testWithOffset() {
- it( 'does not scroll the viewport when the target is fully visible', () => {
- stubRect( target, { top: 50, right: 200, bottom: 150, left: 100, width: 100, height: 100 } );
- scrollViewportToShowTarget( { target, viewportOffset } );
- assertScrollPosition( firstAncestor, { scrollTop: 150, scrollLeft: 200 } );
- sinon.assert.notCalled( global.window.scrollTo );
- } );
- it( 'scrolls the viewport to show the target (above)', () => {
- stubRect( target, { top: -200, right: 200, bottom: -100, left: 100, width: 100, height: 100 } );
- scrollViewportToShowTarget( { target, viewportOffset } );
- assertScrollPosition( firstAncestor, { scrollTop: -100, scrollLeft: 200 } );
- sinon.assert.calledWithExactly( global.window.scrollTo, 100, -130 );
- } );
- it( 'scrolls the viewport to show the target (partially above)', () => {
- stubRect( target, { top: -50, right: 200, bottom: 50, left: 100, width: 100, height: 100 } );
- scrollViewportToShowTarget( { target, viewportOffset } );
- assertScrollPosition( firstAncestor, { scrollTop: 50, scrollLeft: 200 } );
- sinon.assert.calledWithExactly( global.window.scrollTo, 100, 20 );
- } );
- it( 'scrolls the viewport to show the target (below)', () => {
- stubRect( target, { top: 600, right: 200, bottom: 700, left: 100, width: 100, height: 100 } );
- scrollViewportToShowTarget( { target, viewportOffset } );
- assertScrollPosition( firstAncestor, { scrollTop: 700, scrollLeft: 200 } );
- sinon.assert.calledWithExactly( global.window.scrollTo, 100, 350 );
- } );
- it( 'scrolls the viewport to show the target (partially below)', () => {
- stubRect( target, { top: 450, right: 200, bottom: 550, left: 100, width: 100, height: 100 } );
- scrollViewportToShowTarget( { target, viewportOffset } );
- assertScrollPosition( firstAncestor, { scrollTop: 550, scrollLeft: 200 } );
- sinon.assert.calledWithExactly( global.window.scrollTo, 100, 200 );
- } );
- it( 'scrolls the viewport to show the target (to the left)', () => {
- stubRect( target, { top: 0, right: -100, bottom: 100, left: -200, width: 100, height: 100 } );
- scrollViewportToShowTarget( { target, viewportOffset } );
- assertScrollPosition( firstAncestor, { scrollTop: 100, scrollLeft: -100 } );
- sinon.assert.calledWithExactly( global.window.scrollTo, -130, 70 );
- } );
- it( 'scrolls the viewport to show the target (partially to the left)', () => {
- stubRect( target, { top: 0, right: 50, bottom: 100, left: -50, width: 100, height: 100 } );
- scrollViewportToShowTarget( { target, viewportOffset } );
- assertScrollPosition( firstAncestor, { scrollTop: 100, scrollLeft: 50 } );
- sinon.assert.calledWithExactly( global.window.scrollTo, 20, 70 );
- } );
- it( 'scrolls the viewport to show the target (to the right)', () => {
- stubRect( target, { top: 0, right: 1200, bottom: 100, left: 1100, width: 100, height: 100 } );
- scrollViewportToShowTarget( { target, viewportOffset } );
- assertScrollPosition( firstAncestor, { scrollTop: 100, scrollLeft: 1200 } );
- sinon.assert.calledWithExactly( global.window.scrollTo, 350, 70 );
- } );
- it( 'scrolls the viewport to show the target (partially to the right)', () => {
- stubRect( target, { top: 0, right: 1050, bottom: 100, left: 950, width: 100, height: 100 } );
- scrollViewportToShowTarget( { target, viewportOffset } );
- assertScrollPosition( firstAncestor, { scrollTop: 100, scrollLeft: 1050 } );
- sinon.assert.calledWithExactly( global.window.scrollTo, 200, 70 );
- } );
- }
- } );
- function stubRect( target, geometryStub, scrollStub ) {
- if ( isRange( target ) ) {
- testUtils.sinon.stub( target, 'getClientRects' ).returns( [ geometryStub ] );
- } else {
- testUtils.sinon.stub( target, 'getBoundingClientRect' ).returns( geometryStub );
- }
- if ( scrollStub ) {
- let { scrollLeft, scrollTop } = scrollStub;
- // There's no way to stub scrollLeft|Top with Sinon. defineProperties
- // must be used instead.
- Object.defineProperties( target, {
- scrollLeft: {
- get() {
- return scrollLeft;
- },
- set( value ) {
- scrollLeft = value;
- }
- },
- scrollTop: {
- get() {
- return scrollTop;
- },
- set( value ) {
- scrollTop = value;
- }
- }
- } );
- }
- }
- function assertScrollPosition( element, expected ) {
- expect( element.scrollTop ).to.equal( expected.scrollTop, 'scrollTop' );
- expect( element.scrollLeft ).to.equal( expected.scrollLeft, 'scrollLeft' );
- }
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