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function getAvailableHeight() {
const navbar = document.querySelector('nav')
const postBar = document.querySelector('.single-post-bar')
const navbarHeight = navbar ? navbar.offsetHeight : 0
const postBarHeight = postBar ? postBar.offsetHeight : 0
const padding = 40
return window.innerHeight - navbarHeight - postBarHeight - padding
}
function updateSizeSelection(selectedSize) {
document.querySelectorAll('.single-post-bar-size-actions a').forEach((link) => {
link.classList.remove('size-selected')
if (link.onclick && link.onclick.toString().includes(selectedSize)) {
link.classList.add('size-selected')
}
})
}
let currentSize = 'fitBoth'
function handleResize() {
if (currentSize === 'fitHeight' || currentSize === 'fitBoth') {
switchSize(currentSize)
}
}
function switchSize(size) {
currentSize = size
const img = document.getElementById('post-image')
const sizeData = sizes[size]
img.className = ''
img.style.width = ''
img.style.height = ''
img.style.maxWidth = ''
img.style.maxHeight = ''
if (size === 'fitHeight') {
const availableHeight = getAvailableHeight()
img.style.maxHeight = availableHeight + 'px'
img.style.width = 'auto'
img.style.maxWidth = 'none'
img.classList.add('fit-height')
} else if (size === 'fitWidth') {
img.style.width = '100%'
img.style.height = 'auto'
img.style.maxWidth = '100%'
img.classList.add('fit-width')
} else if (size === 'fitBoth') {
const availableHeight = getAvailableHeight()
const imageWidth = parseInt(sizeData.width || img.naturalWidth)
const imageHeight = parseInt(sizeData.height || img.naturalHeight)
if (imageHeight > imageWidth) {
img.style.maxHeight = availableHeight + 'px'
img.style.width = 'auto'
img.style.maxWidth = 'none'
} else {
img.style.width = '100%'
img.style.height = 'auto'
img.style.maxWidth = '100%'
}
img.classList.add('fit-both')
} else {
img.style.maxWidth = 'none'
if (sizeData.width) img.style.width = sizeData.width + 'px'
if (sizeData.height) img.style.height = sizeData.height + 'px'
img.classList.add('fixed-size')
}
if (img.src !== sizeData.src) {
img.src = sizeData.src
}
updateSizeSelection(size)
}
window.addEventListener('resize', handleResize)
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