mirror of
https://github.com/yu-i-i/overleaf-cep.git
synced 2025-07-29 14:00:05 +02:00
62 lines
2 KiB
JavaScript
62 lines
2 KiB
JavaScript
import { PDFJS } from '@/features/pdf-preview/util/pdf-js'
|
|
|
|
export function buildHighlightElement(highlight, viewer) {
|
|
const { viewport, div } = viewer.getPageView(highlight.page - 1)
|
|
|
|
// page coordinates from synctex
|
|
const rectangle = {
|
|
left: highlight.h,
|
|
right: highlight.h + highlight.width,
|
|
top: highlight.v,
|
|
bottom: highlight.v + highlight.height,
|
|
}
|
|
|
|
// needed because PDF page origin is at the bottom left
|
|
const viewBoxHeight = viewport.viewBox[3] + 10
|
|
|
|
// account for scaling
|
|
const viewportRectangle = viewport.convertToViewportRectangle([
|
|
rectangle.left,
|
|
viewBoxHeight - rectangle.bottom,
|
|
rectangle.right,
|
|
viewBoxHeight - rectangle.top,
|
|
])
|
|
|
|
// flip top/bottom, left/right if needed
|
|
const normalizedRectangle = PDFJS.Util.normalizeRect(viewportRectangle)
|
|
|
|
const [left, top, right, bottom] = normalizedRectangle
|
|
|
|
// restrict to within the page container
|
|
const clampedRectangle = {
|
|
left: Math.max(left, 0),
|
|
right: Math.min(right, div.clientWidth),
|
|
top: Math.max(top, 0),
|
|
bottom: Math.min(bottom, div.clientHeight),
|
|
}
|
|
|
|
// convert to screen positions
|
|
const positions = {
|
|
left: div.offsetLeft + clampedRectangle.left,
|
|
right: div.offsetLeft + clampedRectangle.right,
|
|
top: div.offsetTop + clampedRectangle.top,
|
|
bottom: div.offsetTop + clampedRectangle.bottom,
|
|
}
|
|
|
|
const element = document.createElement('div')
|
|
element.style.position = 'absolute'
|
|
element.style.left = Math.floor(positions.left) + 'px'
|
|
element.style.top = Math.floor(positions.top) + 'px'
|
|
element.style.width = Math.floor(positions.right - positions.left) + 'px'
|
|
element.style.height = Math.floor(positions.bottom - positions.top) + 'px'
|
|
element.style.backgroundColor = 'rgb(255,255,0)'
|
|
element.style.display = 'inline-block'
|
|
element.style.scrollMargin = '72px'
|
|
element.style.pointerEvents = 'none'
|
|
element.style.opacity = '0'
|
|
element.style.transition = 'opacity 1s'
|
|
|
|
viewer.viewer?.append(element)
|
|
|
|
return element
|
|
}
|