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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,
* You can obtain one at http://mozilla.org/MPL/2.0/. */
/* globals communication, shot, main, auth, catcher, analytics, buildSettings, blobConverters, thumbnailGenerator */
"use strict";
this.takeshot = (function() {
const exports = {};
const Shot = shot.AbstractShot;
const { sendEvent, incrementCount } = analytics;
const MAX_CANVAS_DIMENSION = 32767;
communication.register("screenshotPage", (sender, selectedPos, isFullPage, devicePixelRatio) => {
return screenshotPage(selectedPos, isFullPage, devicePixelRatio);
});
function screenshotPage(pos, isFullPage, 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 (isFullPage) {
let rectangle = {
x: 0,
y: 0,
width: pos.width,
height: pos.height,
}
options.rect = rectangle;
// To avoid creating extremely large images (which causes
// performance problems), we set the scale to 1.
devicePixelRatio = options.scale = 1;
} else {
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, reject) => {
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);
});
});
}));
}
/** Combines two buffers or Uint8Array's */
function concatBuffers(buffer1, buffer2) {
const tmp = new Uint8Array(buffer1.byteLength + buffer2.byteLength);
tmp.set(new Uint8Array(buffer1), 0);
tmp.set(new Uint8Array(buffer2), buffer1.byteLength);
return tmp.buffer;
}
/** Creates a multipart TypedArray, given {name: value} fields
and a files array in the format of
[{fieldName: "NAME", filename: "NAME.png", blob: fileBlob}, {...}, ...]
Returns {body, "content-type"}
*/
function createMultipart(fields, files) {
const boundary = "---------------------------ScreenshotBoundary" + Date.now();
let body = [];
for (const name in fields) {
body.push("--" + boundary);
body.push(`Content-Disposition: form-data; name="${name}"`);
body.push("");
body.push(fields[name]);
}
body.push("");
body = body.join("\r\n");
const enc = new TextEncoder("utf-8");
body = enc.encode(body).buffer;
const blobToArrayPromises = files.map(f => {
return blobConverters.blobToArray(f.blob);
});
return Promise.all(blobToArrayPromises).then(buffers => {
for (let i = 0; i < buffers.length; i++) {
let filePart = [];
filePart.push("--" + boundary);
filePart.push(`Content-Disposition: form-data; name="${files[i].fieldName}"; filename="${files[i].filename}"`);
filePart.push(`Content-Type: ${files[i].blob.type}`);
filePart.push("");
filePart.push("");
filePart = filePart.join("\r\n");
filePart = concatBuffers(enc.encode(filePart).buffer, buffers[i]);
body = concatBuffers(body, filePart);
body = concatBuffers(body, enc.encode("\r\n").buffer);
}
let tail = `\r\n--${boundary}--`;
tail = enc.encode(tail);
body = concatBuffers(body, tail.buffer);
return {
"content-type": `multipart/form-data; boundary=${boundary}`,
body,
};
});
}
function uploadShot(shot, blob, thumbnail) {
let headers;
return auth.authHeaders().then((_headers) => {
headers = _headers;
if (blob) {
const files = [ {fieldName: "blob", filename: "screenshot.png", blob} ];
if (thumbnail) {
files.push({fieldName: "thumbnail", filename: "thumbnail.png", blob: thumbnail});
}
return createMultipart(
{shot: JSON.stringify(shot)},
files
);
}
return {
"content-type": "application/json",
body: JSON.stringify(shot),
};
}).then((submission) => {
headers["content-type"] = submission["content-type"];
sendEvent("upload", "started", {eventValue: Math.floor(submission.body.length / 1000)});
return fetch(shot.jsonUrl, {
method: "PUT",
mode: "cors",
headers,
body: submission.body,
});
}).then((resp) => {
if (!resp.ok) {
sendEvent("upload-failed", `status-${resp.status}`);
const exc = new Error(`Response failed with status ${resp.status}`);
exc.popupMessage = "REQUEST_ERROR";
throw exc;
} else {
sendEvent("upload", "success");
}
}, (error) => {
// FIXME: I'm not sure what exceptions we can expect
sendEvent("upload-failed", "connection");
error.popupMessage = "CONNECTION_ERROR";
throw error;
});
}
return exports;
})();
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