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Fixed bug-2875 #2883

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Merged
Rokt33r merged 1 commit into from
Apr 28, 2019
Merged

Fixed bug-2875 #2883

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142 changes: 79 additions & 63 deletions browser/components/MarkdownPreview.js
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Original file line number Diff line number Diff line change
Expand Up @@ -835,77 +835,93 @@ export default class MarkdownPreview extends React.Component {

const markdownPreviewIframe = document.querySelector('.MarkdownPreview')
const rect = markdownPreviewIframe.getBoundingClientRect()
const config = { attributes: true, subtree: true }
const imgObserver = new MutationObserver((mutationList) => {
for (const mu of mutationList) {
if (mu.target.className === 'carouselContent-enter-done') {
this.setImgOnClickEventHelper(mu.target, rect)
break
}
}
})

const imgList = markdownPreviewIframe.contentWindow.document.body.querySelectorAll('img')
for (const img of imgList) {
img.onclick = () => {
const widthMagnification = document.body.clientWidth / img.width
const heightMagnification = document.body.clientHeight / img.height
const baseOnWidth = widthMagnification < heightMagnification
const magnification = baseOnWidth ? widthMagnification : heightMagnification

const zoomImgWidth = img.width * magnification
const zoomImgHeight = img.height * magnification
const zoomImgTop = (document.body.clientHeight - zoomImgHeight) / 2
const zoomImgLeft = (document.body.clientWidth - zoomImgWidth) / 2
const originalImgTop = img.y + rect.top
const originalImgLeft = img.x + rect.left
const originalImgRect = {
top: `${originalImgTop}px`,
left: `${originalImgLeft}px`,
width: `${img.width}px`,
height: `${img.height}px`
}
const zoomInImgRect = {
top: `${baseOnWidth ? zoomImgTop : 0}px`,
left: `${baseOnWidth ? 0 : zoomImgLeft}px`,
width: `${zoomImgWidth}px`,
height: `${zoomImgHeight}px`
}
const animationSpeed = 300
const parentEl = img.parentElement
this.setImgOnClickEventHelper(img, rect)
imgObserver.observe(parentEl, config)
}
}

const zoomImg = document.createElement('img')
zoomImg.src = img.src
setImgOnClickEventHelper (img, rect) {
img.onclick = () => {
const widthMagnification = document.body.clientWidth / img.width
const heightMagnification = document.body.clientHeight / img.height
const baseOnWidth = widthMagnification < heightMagnification
const magnification = baseOnWidth ? widthMagnification : heightMagnification

const zoomImgWidth = img.width * magnification
const zoomImgHeight = img.height * magnification
const zoomImgTop = (document.body.clientHeight - zoomImgHeight) / 2
const zoomImgLeft = (document.body.clientWidth - zoomImgWidth) / 2
const originalImgTop = img.y + rect.top
const originalImgLeft = img.x + rect.left
const originalImgRect = {
top: `${originalImgTop}px`,
left: `${originalImgLeft}px`,
width: `${img.width}px`,
height: `${img.height}px`
}
const zoomInImgRect = {
top: `${baseOnWidth ? zoomImgTop : 0}px`,
left: `${baseOnWidth ? 0 : zoomImgLeft}px`,
width: `${zoomImgWidth}px`,
height: `${zoomImgHeight}px`
}
const animationSpeed = 300

const zoomImg = document.createElement('img')
zoomImg.src = img.src
zoomImg.style = `
position: absolute;
top: ${baseOnWidth ? zoomImgTop : 0}px;
left: ${baseOnWidth ? 0 : zoomImgLeft}px;
width: ${zoomImgWidth};
height: ${zoomImgHeight}px;
`
zoomImg.animate([
originalImgRect,
zoomInImgRect
], animationSpeed)

const overlay = document.createElement('div')
overlay.style = `
background-color: rgba(0,0,0,0.5);
cursor: zoom-out;
position: absolute;
top: 0;
left: 0;
width: 100%;
height: ${document.body.clientHeight}px;
z-index: 100;
`
overlay.onclick = () => {
zoomImg.style = `
position: absolute;
top: ${baseOnWidth ? zoomImgTop : 0}px;
left: ${baseOnWidth ? 0 : zoomImgLeft}px;
width: ${zoomImgWidth};
height: ${zoomImgHeight}px;
top: ${originalImgTop}px;
left: ${originalImgLeft}px;
width: ${img.width}px;
height: ${img.height}px;
`
zoomImg.animate([
originalImgRect,
zoomInImgRect
const zoomOutImgAnimation = zoomImg.animate([
zoomInImgRect,
originalImgRect
], animationSpeed)

const overlay = document.createElement('div')
overlay.style = `
background-color: rgba(0,0,0,0.5);
cursor: zoom-out;
position: absolute;
top: 0;
left: 0;
width: 100%;
height: ${document.body.clientHeight}px;
z-index: 100;
`
overlay.onclick = () => {
zoomImg.style = `
position: absolute;
top: ${originalImgTop}px;
left: ${originalImgLeft}px;
width: ${img.width}px;
height: ${img.height}px;
`
const zoomOutImgAnimation = zoomImg.animate([
zoomInImgRect,
originalImgRect
], animationSpeed)
zoomOutImgAnimation.onfinish = () => overlay.remove()
}

overlay.appendChild(zoomImg)
document.body.appendChild(overlay)
zoomOutImgAnimation.onfinish = () => overlay.remove()
}

overlay.appendChild(zoomImg)
document.body.appendChild(overlay)
}
}

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