save-as-ebook/web-extension/selector.js
2019-06-03 18:00:23 +03:00

89 lines
3.1 KiB
JavaScript

var lastTargetElem = null
var lastElementData = {}
var lastParentElem = null
var lastParentData = {}
let bodyElem = document.getElementsByTagName('body')[0]
let bodyInner = bodyElem.innerHTML
bodyElem.innerHTML = ''
let container = document.createElement('div')
container.style.display = "flex"
container.style.flexFlow = "row"
let menu = document.createElement('div')
menu.style.width = '300px'
menu.style.minWidth = '300px'
menu.style.height = '100%'
let page = document.createElement('div')
page.id= 'super-selector'
page.style.width = '100%'
page.style.height = '100%'
page.innerHTML = bodyInner
container.appendChild(menu)
container.appendChild(page)
bodyElem.appendChild(container)
document.getElementById('super-selector').addEventListener('mousemove', (e) => {
// document.getElementsByTagName('body')[0].addEventListener('mousemove', (e) => {
e.preventDefault()
if (lastTargetElem) {
lastTargetElem.style.backgroundColor = lastElementData.backgroundColor
}
let targetElem = document.elementFromPoint(e.clientX, e.clientY);
let targetParent = targetElem.parentNode
lastElementData.backgroundColor = targetElem.style.backgroundColor
targetElem.style.backgroundColor = 'rgba(255,0,0,0.25)'
targetElem.dataset.excluded = 'true'
targetElem.onclick = (e) => {
e.preventDefault() // FIXME except for my menu
e.stopPropagation();
console.log(createXPathFromElement(e.target));
if (!e.target.style.opacity || e.target.style.opacity > 0.2) {
e.target.style.opacity = 0.1
e.target.style.border = 'solid 3px black'
}
else {
e.target.style.opacity = 1
e.target.style.border = 'none'
}
}
lastTargetElem = targetElem
})
// src https://stackoverflow.com/questions/2661818/javascript-get-xpath-of-a-node
function createXPathFromElement(elm) {
var allNodes = document.getElementsByTagName('*');
for (var segs = []; elm && elm.nodeType == 1; elm = elm.parentNode)
{
if (elm.hasAttribute('id')) {
var uniqueIdCount = 0;
for (var n=0;n < allNodes.length;n++) {
if (allNodes[n].hasAttribute('id') && allNodes[n].id == elm.id) uniqueIdCount++;
if (uniqueIdCount > 1) break;
};
if ( uniqueIdCount == 1) {
segs.unshift('id("' + elm.getAttribute('id') + '")');
return segs.join('/');
} else {
segs.unshift(elm.localName.toLowerCase() + '[@id="' + elm.getAttribute('id') + '"]');
}
} else if (elm.hasAttribute('class')) {
segs.unshift(elm.localName.toLowerCase() + '[@class="' + elm.getAttribute('class') + '"]');
} else {
for (i = 1, sib = elm.previousSibling; sib; sib = sib.previousSibling) {
if (sib.localName == elm.localName) i++; };
segs.unshift(elm.localName.toLowerCase() + '[' + i + ']');
};
};
return segs.length ? '/' + segs.join('/') : null;
};