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elierotenberg/prototype.js

Last active May 16, 2019 10:01
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Get text within rectangle
Raw
prototype.js
(() => {
const MAX_BASENAME_LENGTH = 64;
const clicks = [];
const getNodesInRectangle = (topLeft, bottomRight) =>
Array.from(document.querySelectorAll("*").values()).filter(node => {
const { x, y, width, height } = node.getBoundingClientRect();
return (
x >= topLeft.x &&
x + width <= bottomRight.x &&
y >= topLeft.y &&
y + height <= bottomRight.y
);
});
const extractSelection = (topLeft, bottomRight) => {
console.log({ topLeft, bottomRight });
const nodes = getNodesInRectangle(topLeft, bottomRight);
console.log({ nodes });
return nodes.map(node => node.textContent).join(" ");
};
const saveToFile = text => {
const href = `data:text/plain;base64,${btoa(text)}`;
const { location} = document;
const baseName = `${location.hostname}-${location.pathname}`.slice(0, MAX_BASENAME_LENGTH);
const a = document.createElement("a");
a.setAttribute(
"href",
href,
);
a.setAttribute(
"download",
`${baseName}.txt`,
);
a.style.display = "none";
document.body.appendChild(a);
a.click();
document.body.removeChild(a);
};
const onClick = event => {
const point = { x: event.clientX, y: event.clientY };
console.log(point);
clicks.push(point);
if (clicks.length === 2) {
document.removeEventListener("mousedown", onClick);
const [topLeft, bottomRight] = clicks;
saveToFile(extractSelection(topLeft, bottomRight));
}
};
document.addEventListener("mousedown", onClick);
})();
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