Merge pull request 'pov' (#2) from pov into master

package.json

@@ -1,6 +1,6 @@
 {
   "name": "image-viewer",
-  "version": "0.1.2",
+  "version": "0.1.3",
   "private": false,
   "dependencies": {
     "@testing-library/jest-dom": "^4.2.4",

src/components/BookComponent.tsx

@@ -1,5 +1,8 @@
 import React, {createContext} from 'react'
 import OnePageView from './OnePageView'
+import TwoPagesView from './TwoPagesView'
+import BookComponentsController from './BookComponentsController'
+import './index.css'
 
 export const BookContext = createContext({})
 
@@ -9,16 +12,22 @@ export interface IBookPage {
     thumbnail?: string
 }
 
-export const bookViewModes = [
+export const getBookViewModes = (currIndex = 0, srcLength = 0)=>[
     {
         text: 'One Page',
         value: 'one page',
-        icon: ''
+        icon: '',
+        pagesToTurn: 1,
+        nextDisable: currIndex >= srcLength - 1,
+        prevDisable: currIndex === 0,
     },
     {
         text: 'Two Pages',
         value: 'two pages',
-        icon: ''
+        icon: '',
+        pagesToTurn: 2,
+        nextDisable: currIndex >= srcLength - 2,
+        prevDisable: currIndex <= 1,
     }
 ]
 
@@ -36,7 +45,12 @@ export interface IBookContext {
 }
 
 
-class BookComponent extends React.Component<any>{
+const getPagesCountToTurn = (mode: string)=>{
+    let pagesToTurn = getBookViewModes().find(item=> item.value === mode)?.pagesToTurn
+    return pagesToTurn || 0
+}
+
+class BookComponent extends React.Component<any, any>{
     constructor(props: any){
         super(props)
         this.state = {
@@ -45,14 +59,27 @@ class BookComponent extends React.Component<any>{
             flagToReverse: false,
             mode: "one page",
             setBookContextState: (newState: IBookContext)=>{
-                this.setState(oldState=> ({
+                this.setState((oldState: any)=> ({
                     ...oldState,
                     ...newState
                 }))
-            }
+            },
+            changePage: this.changePage,
+            pagesToTurn: 1,
         } 
     }
     
+    changePage = (goToPrevious: boolean, indexToGo?: number)=>{
+        const {mode, currIndex} = this.state
+        const pagesCountToTurn = indexToGo || getPagesCountToTurn(mode)
+        const prefixPageCount = goToPrevious? -1 : 1
+        
+        this.setState({
+            currIndex: (pagesCountToTurn * prefixPageCount) + currIndex,
+            flagToReverse: goToPrevious
+        })
+    }
+
     componentDidMount(){
         fetch('https://picsum.photos/v2/list')
             .then(response=>{
@@ -71,12 +98,38 @@ class BookComponent extends React.Component<any>{
             })
     }
 
+    getControlsDisable = ()=>{
+        const {mode, currIndex, src} = this.state
+        const {nextDisable, prevDisable} = getBookViewModes(currIndex, src.length).find(item=> item.value === mode) || {
+            nextDisable: true,
+            prevDisable: true
+        }
+
+        return {
+            nextDisable,
+            prevDisable
+        }
+    }
+    
     render(){
+        const {mode} = this.state
+
         return <BookContext.Provider value={{...this.state}}>
             <BookContext.Consumer>
                 {state=>(
                     <>
-                        <OnePageView {...state}/>
+                        {mode === "one page" && <OnePageView {...state}/>}
+                        {mode === "two pages" && <TwoPagesView {...state}/>}
+                        <BookComponentsController
+                            onPrevClick={()=>{
+                                this.changePage(true)
+                            }}
+                            onNextClick={()=>{
+                                this.changePage(false)
+                            }}
+                            {...this.getControlsDisable()}
+                            {...this.state}
+                        />
                     </>
                 )}
             </BookContext.Consumer>

src/components/BookComponentsController.tsx

@@ -1,45 +1,48 @@
 import React from 'react'
 import styled from 'styled-components'
-import {Button, Popover} from 'antd'
+import {Button} from 'antd'
 import ViewSwitcher from './ViewSwitcher'
 import JumpControls from './JumpControls'
+import {
+    CaretLeftOutlined,
+    CaretRightOutlined,
+  } from '@ant-design/icons';
 
 const ControlsContanter = styled.div`
     display: inline-flex;
     justify-content: space-between;
-    width: 500px;
+    width: 100%;
 `
 export default function BookCoponentsController(props: any) {
     const {onPrevClick, prevDisable, onNextClick, nextDisable, ...restProps} = props
 
     return (
         <ControlsContanter>
+            <JumpControls {...restProps}/>
+
             <Button
                 onClick={()=>{
                     onPrevClick()
                 }}
                 disabled={prevDisable}
-            >
-                Previous
-            </Button>
+                style={{
+                    marginRight: 8
+                }}
+                icon={<CaretLeftOutlined />}
+            />
+             
             <Button 
                 onClick={()=>{
                     onNextClick()
                 }}
                 disabled={nextDisable}
+                style={{
+                    marginRight: 8
+                }}
+                icon={<CaretRightOutlined />}
             >
-                Next
             </Button>
         
-            
-            <Popover
-                trigger="click" 
-                content={<JumpControls {...restProps}/>}>
-                <Button>
-                    Jump
-                </Button>
-            </Popover>
-
             <ViewSwitcher {...restProps}/>
             
         </ControlsContanter>            

src/components/JumpControls.tsx

@@ -1,14 +1,23 @@
 import React, {useState, useCallback, useEffect} from 'react'
-import {Row, Col, Slider, InputNumber} from 'antd'
+import {Slider, InputNumber} from 'antd'
+import styled from 'styled-components'
+
+
+const Container = styled.div`
+    width: 100%;
+    display: inline-flex;
+`
 
 const JumpControls = (props: any)=>{
-    const {src, currIndex, setBookContextState} = props
+    const {src, currIndex, setBookContextState, pagesToTurn} = props
     const [inputValue, setInputValue] = useState(currIndex)
-
+    const [sliderValue, setSliderValue] = useState(currIndex)
     const onChange = useCallback(
         (value) => {
+            
             if(value){
                 const newCurrIndex = value -1
+                
                 if(newCurrIndex < src.length && newCurrIndex >=0){
                     setBookContextState({
                         currIndex: value - 1,
@@ -17,31 +26,43 @@ const JumpControls = (props: any)=>{
                 }                
             }  
         },
-        [inputValue])
+        [inputValue, src.length, setBookContextState])
 
     useEffect(()=>{
         setInputValue(currIndex + 1)
     }, [currIndex])
 
-    return <Row>
-        <Col span={12}>
+    useEffect(() => {
+        setSliderValue(inputValue)
+    }, [inputValue])
+
+
+    const sliderRestProps = ()=>{
+        return sliderValue === inputValue? {}: {value: inputValue}
+    }
+
+    return <Container>
         <Slider
+            style={{
+                flexGrow: 1
+            }}
             min={1}
             max={src.length}
-            onChange={onChange}
-            value={typeof inputValue === 'number' ? inputValue : 0}
+            onAfterChange={onChange}
+            step={pagesToTurn}
+            defaultValue={typeof inputValue === 'number' ? inputValue : 1}
+            {...sliderRestProps()}
         />
-        </Col>
-        <Col span={4}>
+        
         <InputNumber
+            className={"jump-control"}
             min={1}
             max={src.length}
             style={{ margin: '0 8px' }}
             value={inputValue}
             onChange={onChange}
         />
-        </Col>
-    </Row>
+    </Container>
 }
 
 export default JumpControls

src/components/OnePageView.tsx

@@ -1,7 +1,6 @@
-import React, {useState, useCallback, useEffect} from 'react'
+import React from 'react'
 import {Transition, animated} from 'react-spring/renderprops'
 import styled, { } from 'styled-components'
-import BookComponentsController from './BookComponentsController'
 
 const ComponentContainer = styled.div`
     display: flex;
@@ -24,10 +23,9 @@ const PageContainer = styled.div`
         height: 100%;
     }
 `
-
-const StyledImage = styled(animated.div)<{src:string}>`
-    width: 100%;
-    height: 100%;
+const StyledImage = styled(animated.div)<{src:string, width:number | string, height: number| string}>`
+    width: ${props=> props.width? props.width: '100%'};
+    height: ${props=> props.height? props.height: '100%'};
     display: flex;
     justify-content: center;
     align-items: center;
@@ -36,30 +34,13 @@ const StyledImage = styled(animated.div)<{src:string}>`
 `
 
 const PageComponent = (props: any)=>{
-    const {src} = props
-    return <StyledImage src={src}/>
+    const {src, width, height} = props
+    return <StyledImage src={src} width={width} height={height}/>
 }
 
 
 function BookComponent(props: any) {
-    const {src, currIndex, setBookContextState, flagToReverse} = props
-    const [prevDisable, setPrevDisable] = useState(true)
-    const [nextDisable, setNextDisable] = useState(false)
-    
-    const changePage = useCallback((indexToGo, goToPrevious)=>{
-        const newCurrIndex = currIndex + indexToGo
-        setBookContextState({
-            currIndex: newCurrIndex,
-            flagToReverse: goToPrevious
-        })
-    
-    }, [currIndex])
-
-    useEffect(() => {
-        setNextDisable(currIndex >= src.length - 1)
-        setPrevDisable(currIndex <= 0)
-    }, [currIndex, src])
-
+    const {src, currIndex, flagToReverse} = props    
     return (
         <ComponentContainer>
             <PageContainer>
@@ -77,8 +58,6 @@ function BookComponent(props: any) {
                             return(
                                 <animated.div style={{
                                     ...style,
-                                    overflowX: 'hidden'
-                                    
                                     }}>
                                     {React.createElement(()=><PageComponent src={src[currIndex]? src[currIndex].src: null}/>)}
                                 </animated.div>
@@ -87,17 +66,8 @@ function BookComponent(props: any) {
                     }
                 </Transition>
             </PageContainer>
-
-            <BookComponentsController 
-                prevDisable={prevDisable} 
-                onPrevClick={()=> changePage(-1, true)}
-                nextDisable={nextDisable}
-                onNextClick={()=>changePage(1, false)}
-                {...props}
-            />
-
         </ComponentContainer>
     )
 }
 
-export default BookComponent
+export {ComponentContainer, PageContainer, PageComponent, BookComponent as default }  

src/components/TwoPagesView.tsx

@@ -0,0 +1,91 @@
+import React, {useState, useEffect} from 'react'
+import {Transition, animated} from 'react-spring/renderprops'
+import {ComponentContainer, PageComponent, PageContainer} from './OnePageView'
+import { IBookContext } from './BookComponent'
+
+export default function TwoPagesView(props: any) {
+    let {src, currIndex, flagToReverse} = props
+    const [pagesToshow, setPagesToShow] = useState<IBookContext[]>([])
+    
+    useEffect(()=>{
+        const shouldShowPage = (pageIndex: number)=>{
+            return src.length > 0 && pageIndex <= src.length - 1
+        }
+
+        const newCurrIndex = currIndex % 2 === 0 ? currIndex: currIndex - 1
+
+        const shouldShowFirstPage = shouldShowPage(newCurrIndex)
+        if(shouldShowFirstPage){
+            const shouldShowSecondPage = shouldShowPage(newCurrIndex + 1)
+            setPagesToShow([
+                src[newCurrIndex], 
+                shouldShowSecondPage? src[newCurrIndex + 1]: {
+                        src: '',
+                        alt: '',
+                        thumbnail: '',
+                    }
+            ])
+        }
+    }, [currIndex, src])
+
+    return (
+        <ComponentContainer>
+            <PageContainer>
+                <Transition
+                    reset
+                    unique
+                    items={pagesToshow}
+                    keys={(item: any)=> item.src}
+                    initial={{}}
+                    from={{opacity: 1, transform: flagToReverse? "translate3d(-50%, 0, 0)": "translate3d(100%, 0, 0)"}}
+                    enter={{ opacity: 1, transform: "translate3d(0%, 0, 0)" }}
+                    leave={{ opacity: 0, transform: flagToReverse? "translate3d(100%, 0, 0)": "translate3d(-50%, 0, 0)"}}
+                >
+                    {
+                        currIndex=> style=>{
+                            return(
+                                <animated.div style={{
+                                    ...style,
+                                    }}>
+                                    {React.createElement(()=>{
+                                        return <PageComponent width={"50%"} src={pagesToshow[0]? pagesToshow[0].src: null}/>
+                                    })}
+                                </animated.div>
+                            )
+                        }
+                    }
+                </Transition>
+
+                <Transition
+                    reset
+                    unique
+                    items={pagesToshow}
+                    keys={(item: any)=> item.src}
+                    from={{opacity: 1, transform: flagToReverse? "translate3d(0%, 0, 0)": "translate3d(150%, 0, 0)"}}
+                    enter={{ opacity: 1, transform: "translate3d(50%, 0, 0)" }}
+                    leave={{ opacity: 0, transform: flagToReverse? "translate3d(150%, 0, 0)": "translate3d(0%, 0, 0)"}}
+                    initial={{}}
+                >
+                    {
+                        currIndex=> style=>{
+                            return(
+                                <animated.div style={{
+                                    ...style,
+                                    }}>
+                                    {React.createElement(()=>{
+                                        return <PageComponent width={"50%"} src={pagesToshow[1]? pagesToshow[1].src: null}/>
+                                    })}
+                                </animated.div>
+                            )
+                        }
+                    }
+                </Transition>
+            </PageContainer>
+        </ComponentContainer>
+    )
+}
+
+interface Book {
+    name: string
+}
+

src/components/ViewSwitcher.tsx

@@ -1,6 +1,6 @@
 import React, {useCallback} from 'react'
 import {Select} from 'antd'
-import {IBookContext, bookViewModes} from './BookComponent'
+import {IBookContext, getBookViewModes} from './BookComponent'
 
 
 const {Option} = Select
@@ -10,15 +10,16 @@ export default function ViewSwitcher(props: IBookContext) {
 
     const viewModeChange = useCallback((mode) => {
         setBookContextState({
-            mode
+            mode,
+            pagesToTurn: getBookViewModes().find(item=> item.value === mode)?.pagesToTurn || 0
         })
-    },[])
+    },[setBookContextState])
 
     return (
         <Select value={mode} onSelect={viewModeChange}>
             {
-                bookViewModes.map((item: any)=>{
-                    return <Option value={item.value}>{item.text}</Option>
+                getBookViewModes().map((item: any)=>{
+                    return <Option value={item.value} key={item.value}>{item.text}</Option>
                 })
             }
         </Select> 

src/components/index.css

@@ -0,0 +1,3 @@
+.jump-control .ant-input-number-handler-wrap{
+    display: none;
+}