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select.js
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select.js
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function getSelectionText() {
let text = "";
let activeEl = document.activeElement;
let activeElTagName = activeEl ? activeEl.tagName.toLowerCase() : null;
if (
activeElTagName == "textarea" ||
(activeElTagName == "input" &&
/^(?:text|search|password|tel|url)$/i.test(activeEl.type) &&
typeof activeEl.selectionStart == "number")
) {
text = activeEl.value.slice(activeEl.selectionStart, activeEl.selectionEnd);
} else if (window.getSelection()) {
text = window.getSelection().toString();
}
return text;
}
async function fetchWord(word) {
const res = await fetch(
`https://api.dictionaryapi.dev/api/v2/entries/en/${word}`
);
if (res.status === 200) {
// definition found
const data = await res.json();
console.log(data);
return data;
} else {
console.log("no definition found");
return null;
}
}
async function pushDict(word) {
let data;
let isError = false;
try {
data = await fetchWord(word); // fetch definition from google
} catch (e) {
console.log("could not fetch dictionary...");
isError = true;
}
let parent = document.createElement("div");
parent.classList.add("reset-parent");
let div = document.createElement("div");
if (data) {
// definition found
// dictionary title
let title = document.createElement("h4");
title.innerText = word;
div.appendChild(title);
let hr = document.createElement("hr");
div.appendChild(hr);
// parse data to display
const meanings = data[0].meanings; // take top source
for (let meaning of meanings) {
// show all types
let type = document.createElement("div");
type.classList.add("type");
type.innerText = meaning.partOfSpeech;
div.appendChild(type);
let defs = document.createElement("ol");
for (let i = 0; i < 2; ++i) {
// show first two definition
if (i < meaning.definitions.length) {
let item = meaning.definitions[i];
let def = document.createElement("li");
let defText = document.createElement("small");
defText.innerText = item.definition;
def.appendChild(defText);
if (item.example) {
// insert example if exists
let br = document.createElement("br");
def.appendChild(br);
let defEx = document.createElement("small");
defEx.classList.add("ex");
defEx.innerText = `"${item.example}"`;
def.appendChild(defEx);
}
defs.appendChild(def);
}
}
div.appendChild(defs);
}
} else if (!isError) {
// definition not found
let warning = document.createTextNode(`Unknown word "${word}".`);
div.appendChild(warning);
} else {
// api error
let warning = document.createTextNode(`Could not fetch dictionary.`);
div.appendChild(warning);
}
// append to body
div.classList.add("dictionNotification", "fade-in");
parent.appendChild(div);
hideOnClickOutside(div);
return parent;
}
function wordCount(word) {
const words = word.split(" ");
return words.length;
}
function hideOnClickOutside(element) {
const outSideClickListener = (event) => {
if (element && !element.contains(event.target)) {
console.log(element.classList);
element.classList.replace("fade-in", "fade-out");
setTimeout(function () {
element.remove();
removeClickListener();
}, 400);
}
};
const removeClickListener = () => {
document.removeEventListener("click", outSideClickListener);
};
document.addEventListener("click", outSideClickListener);
}
let selected = "";
let prevTimer;
let anchor = "tr";
let prevDict;
const select = function () {
selected = getSelectionText().trim();
if (prevTimer) {
// clear prev timer
clearTimeout(prevTimer);
}
if (selected !== "" && wordCount(selected) <= 2) {
// only fire when string is not empty, and has word count less then 2
prevTimer = setTimeout(async function () {
console.log(selected);
prevDict = await pushDict(selected);
prevDict.classList.add(anchor);
document.body.appendChild(prevDict);
}, 1500);
}
};
chrome.storage.sync.get("isEnabled", function (data) {
if (data.isEnabled) {
document.onselectionchange = select;
}
});
chrome.storage.sync.get("anchor", function (data) {
anchor = data.anchor;
});
chrome.storage.onChanged.addListener(function (changes) {
console.log(changes);
if (changes.isEnabled) {
if (changes.isEnabled.newValue) {
// enable diction
console.log("enabled");
document.onselectionchange = select;
} else {
// diction disabled
console.log("disabled");
document.onselectionchange = null;
}
}
if (changes.anchor) {
anchor = changes.anchor.newValue;
if (prevDict) {
prevDict.classList.replace(
changes.anchor.oldValue,
changes.anchor.newValue
);
}
}
});