quartz-research-note/quartz/components/scripts/explorer.inline.ts
Ben Schlegel 6a2e0b3ad3
fix: bad visibility for last explorer item (#478)
* fix: bad visibility for last explorer item

* feat(explorer): add pseudo element for observer
2023-09-17 22:04:44 +02:00

163 lines
5.3 KiB
TypeScript

import { FolderState } from "../ExplorerNode"
// Current state of folders
let explorerState: FolderState[]
const observer = new IntersectionObserver((entries) => {
// If last element is observed, remove gradient of "overflow" class so element is visible
const explorer = document.getElementById("explorer-ul")
for (const entry of entries) {
if (entry.isIntersecting) {
explorer?.classList.add("no-background")
} else {
explorer?.classList.remove("no-background")
}
}
})
function toggleExplorer(this: HTMLElement) {
// Toggle collapsed state of entire explorer
this.classList.toggle("collapsed")
const content = this.nextElementSibling as HTMLElement
content.classList.toggle("collapsed")
content.style.maxHeight = content.style.maxHeight === "0px" ? content.scrollHeight + "px" : "0px"
}
function toggleFolder(evt: MouseEvent) {
evt.stopPropagation()
// Element that was clicked
const target = evt.target as HTMLElement
// Check if target was svg icon or button
const isSvg = target.nodeName === "svg"
// corresponding <ul> element relative to clicked button/folder
let childFolderContainer: HTMLElement
// <li> element of folder (stores folder-path dataset)
let currentFolderParent: HTMLElement
// Get correct relative container and toggle collapsed class
if (isSvg) {
childFolderContainer = target.parentElement?.nextSibling as HTMLElement
currentFolderParent = target.nextElementSibling as HTMLElement
childFolderContainer.classList.toggle("open")
} else {
childFolderContainer = target.parentElement?.parentElement?.nextElementSibling as HTMLElement
currentFolderParent = target.parentElement as HTMLElement
childFolderContainer.classList.toggle("open")
}
if (!childFolderContainer) return
// Collapse folder container
const isCollapsed = childFolderContainer.classList.contains("open")
setFolderState(childFolderContainer, !isCollapsed)
// Save folder state to localStorage
const clickFolderPath = currentFolderParent.dataset.folderpath as string
// Remove leading "/"
const fullFolderPath = clickFolderPath.substring(1)
toggleCollapsedByPath(explorerState, fullFolderPath)
const stringifiedFileTree = JSON.stringify(explorerState)
localStorage.setItem("fileTree", stringifiedFileTree)
}
function setupExplorer() {
// Set click handler for collapsing entire explorer
const explorer = document.getElementById("explorer")
// Get folder state from local storage
const storageTree = localStorage.getItem("fileTree")
// Convert to bool
const useSavedFolderState = explorer?.dataset.savestate === "true"
if (explorer) {
// Get config
const collapseBehavior = explorer.dataset.behavior
// Add click handlers for all folders (click handler on folder "label")
if (collapseBehavior === "collapse") {
Array.prototype.forEach.call(
document.getElementsByClassName("folder-button"),
function (item) {
item.removeEventListener("click", toggleFolder)
item.addEventListener("click", toggleFolder)
},
)
}
// Add click handler to main explorer
explorer.removeEventListener("click", toggleExplorer)
explorer.addEventListener("click", toggleExplorer)
}
// Set up click handlers for each folder (click handler on folder "icon")
Array.prototype.forEach.call(document.getElementsByClassName("folder-icon"), function (item) {
item.removeEventListener("click", toggleFolder)
item.addEventListener("click", toggleFolder)
})
if (storageTree && useSavedFolderState) {
// Get state from localStorage and set folder state
explorerState = JSON.parse(storageTree)
explorerState.map((folderUl) => {
// grab <li> element for matching folder path
const folderLi = document.querySelector(
`[data-folderpath='/${folderUl.path}']`,
) as HTMLElement
// Get corresponding content <ul> tag and set state
const folderUL = folderLi.parentElement?.nextElementSibling
if (folderUL) {
setFolderState(folderUL as HTMLElement, folderUl.collapsed)
}
})
} else {
// If tree is not in localStorage or config is disabled, use tree passed from Explorer as dataset
explorerState = JSON.parse(explorer?.dataset.tree as string)
}
}
window.addEventListener("resize", setupExplorer)
document.addEventListener("nav", () => {
setupExplorer()
const explorerContent = document.getElementById("explorer-ul")
// select pseudo element at end of list
const lastItem = document.getElementById("explorer-end")
observer.disconnect()
observer.observe(lastItem as Element)
})
/**
* Toggles the state of a given folder
* @param folderElement <div class="folder-outer"> Element of folder (parent)
* @param collapsed if folder should be set to collapsed or not
*/
function setFolderState(folderElement: HTMLElement, collapsed: boolean) {
if (collapsed) {
folderElement?.classList.remove("open")
} else {
folderElement?.classList.add("open")
}
}
/**
* Toggles visibility of a folder
* @param array array of FolderState (`fileTree`, either get from local storage or data attribute)
* @param path path to folder (e.g. 'advanced/more/more2')
*/
function toggleCollapsedByPath(array: FolderState[], path: string) {
const entry = array.find((item) => item.path === path)
if (entry) {
entry.collapsed = !entry.collapsed
}
}