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Code Issues Releases Wiki Activity

change a magnification by image size #1448

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This commit is contained in:
roottool
2019-01-16 22:47:42 +09:00
parent 72df418953
commit ea5970ab1c
1 changed files with 24 additions and 15 deletions
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39
browser/components/MarkdownPreview.js
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@@ -838,30 +838,39 @@ export default class MarkdownPreview extends React.Component {
const imgList = item.contentWindow.document.body.querySelectorAll('img')
for (const img of imgList) {
img.onclick = () => {
const magnification = document.body.clientWidth / img.width
const top = document.body.clientHeight / 2 - img.height * magnification / 2
const animationSpeed = 300
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 zoomInImgTop = document.body.clientHeight / 2 - zoomImgHeight / 2
const zoomInImgLeft = document.body.clientWidth / 2 - zoomImgWidth / 2
const originalImgTop = img.y + rect.top
const originalImgLeft = img.x + rect.left
const originalImgRect = {
top: `${img.y + rect.top}px`,
left: `${img.x + rect.left}px`,
top: `${originalImgTop}px`,
left: `${originalImgLeft}px`,
width: `${img.width}px`,
height: `${img.height}px`
}
const zoomInImgRect = {
top: `${top}px`,
left: 0,
width: `100%`,
height: `${img.height * magnification}px`
top: `${baseOnWidth ? zoomInImgTop : 0}px`,
left: `${baseOnWidth ? 0 : zoomInImgLeft}px`,
width: `${zoomImgWidth}px`,
height: `${zoomImgHeight}px`
}
const animationSpeed = 300
const zoomImg = document.createElement('img')
zoomImg.src = img.src
zoomImg.style = `
position: absolute;
top: ${top}px;
left: 0;
width: 100%;
height: ${img.height * magnification}px;
top: ${baseOnWidth ? zoomInImgTop : 0}px;
left: ${baseOnWidth ? 0 : zoomInImgLeft}px;
width: ${zoomImgWidth};
height: ${zoomImgHeight}px;
`
zoomImg.animate([
originalImgRect,
@@ -882,8 +891,8 @@ export default class MarkdownPreview extends React.Component {
overlay.onclick = () => {
zoomImg.style = `
position: absolute;
top: ${img.y + rect.top}px;
left: ${img.x + rect.left}px;
top: ${originalImgTop}px;
left: ${originalImgLeft}px;
width: ${img.width}px;
height: ${img.height}px;
`