gecko-dev/devtools/server/actors/device.js

113 строки
3.6 KiB
JavaScript

/* 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/. */
"use strict";
const { Ci, Cc } = require("chrome");
const Services = require("Services");
const protocol = require("devtools/shared/protocol");
const { LongStringActor } = require("devtools/server/actors/string");
const {
addDebugServiceWorkersListener,
canDebugServiceWorkers,
isParentInterceptEnabled,
removeDebugServiceWorkersListener,
} = require("devtools/shared/service-workers-debug-helper");
const { DebuggerServer } = require("devtools/server/debugger-server");
const { getSystemInfo } = require("devtools/shared/system");
const { deviceSpec } = require("devtools/shared/specs/device");
const { AppConstants } = require("resource://gre/modules/AppConstants.jsm");
exports.DeviceActor = protocol.ActorClassWithSpec(deviceSpec, {
initialize: function(conn) {
protocol.Actor.prototype.initialize.call(this, conn);
// pageshow and pagehide event release wake lock, so we have to acquire
// wake lock again by pageshow event
this._onPageShow = this._onPageShow.bind(this);
if (this._window) {
this._window.addEventListener("pageshow", this._onPageShow, true);
}
this._acquireWakeLock();
this._onDebugServiceWorkersUpdated = this._onDebugServiceWorkersUpdated.bind(
this
);
addDebugServiceWorkersListener(this._onDebugServiceWorkersUpdated);
},
destroy: function() {
protocol.Actor.prototype.destroy.call(this);
this._releaseWakeLock();
if (this._window) {
this._window.removeEventListener("pageshow", this._onPageShow, true);
}
removeDebugServiceWorkersListener(this._onDebugServiceWorkersUpdated);
},
_onDebugServiceWorkersUpdated: function() {
this.emit("can-debug-sw-updated", canDebugServiceWorkers());
},
getDescription: function() {
return Object.assign({}, getSystemInfo(), {
canDebugServiceWorkers: canDebugServiceWorkers(),
isParentInterceptEnabled: isParentInterceptEnabled(),
});
},
screenshotToDataURL: function() {
const window = this._window;
const { devicePixelRatio } = window;
const canvas = window.document.createElementNS(
"http://www.w3.org/1999/xhtml",
"canvas"
);
const width = window.innerWidth;
const height = window.innerHeight;
canvas.setAttribute("width", Math.round(width * devicePixelRatio));
canvas.setAttribute("height", Math.round(height * devicePixelRatio));
const context = canvas.getContext("2d");
const flags =
context.DRAWWINDOW_DRAW_CARET |
context.DRAWWINDOW_DRAW_VIEW |
context.DRAWWINDOW_USE_WIDGET_LAYERS;
context.scale(devicePixelRatio, devicePixelRatio);
context.drawWindow(window, 0, 0, width, height, "rgb(255,255,255)", flags);
const dataURL = canvas.toDataURL("image/png");
return new LongStringActor(this.conn, dataURL);
},
_acquireWakeLock: function() {
if (AppConstants.platform !== "android") {
return;
}
const pm = Cc["@mozilla.org/power/powermanagerservice;1"].getService(
Ci.nsIPowerManagerService
);
this._wakelock = pm.newWakeLock("screen", this._window);
},
_releaseWakeLock: function() {
if (this._wakelock) {
try {
this._wakelock.unlock();
} catch (e) {
// Ignore error since wake lock is already unlocked
}
this._wakelock = null;
}
},
_onPageShow: function() {
this._releaseWakeLock();
this._acquireWakeLock();
},
get _window() {
return Services.wm.getMostRecentWindow(DebuggerServer.chromeWindowType);
},
});