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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
/* globals browser, communication, getZoomFactor, shot, main, catcher, analytics, blobConverters, thumbnailGenerator */
"use strict";
this.takeshot = (function () {
const exports = {};
const MAX_CANVAS_DIMENSION = 32766;
communication.register(
"screenshotPage",
(sender, selectedPos, screenshotType, devicePixelRatio) => {
return screenshotPage(selectedPos, screenshotType, devicePixelRatio);
}
);
communication.register("getZoomFactor", () => {
return getZoomFactor();
});
function screenshotPage(pos, screenshotType, devicePixelRatio) {
pos.width = Math.min(pos.right - pos.left, MAX_CANVAS_DIMENSION);
pos.height = Math.min(pos.bottom - pos.top, MAX_CANVAS_DIMENSION);
// If we are printing the full page or a truncated full page,
// we must pass in this rectangle to preview the entire image
let options = { format: "png" };
if (
screenshotType === "fullPage" ||
screenshotType === "fullPageTruncated"
) {
let rectangle = {
x: 0,
y: 0,
width: pos.width,
height: pos.height,
};
options.rect = rectangle;
options.resetScrollPosition = true;
} else if (screenshotType != "visible") {
let rectangle = {
x: pos.left,
y: pos.top,
width: pos.width,
height: pos.height,
};
options.rect = rectangle;
}
return catcher.watchPromise(
browser.tabs.captureTab(null, options).then(dataUrl => {
const image = new Image();
image.src = dataUrl;
return new Promise(resolve => {
image.onload = catcher.watchFunction(() => {
const xScale = devicePixelRatio;
const yScale = devicePixelRatio;
const canvas = document.createElement("canvas");
canvas.height = pos.height * yScale;
canvas.width = pos.width * xScale;
const context = canvas.getContext("2d");
context.drawImage(
image,
0,
0,
pos.width * xScale,
pos.height * yScale,
0,
0,
pos.width * xScale,
pos.height * yScale
);
const result = canvas.toDataURL();
resolve(result);
});
});
})
);
}
return exports;
})();