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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/. */
"use strict";
/* global content, docShell, addEventListener, addMessageListener,
removeEventListener, removeMessageListener, sendAsyncMessage, Services */
var global = this;
// Guard against loading this frame script mutiple times
(function () {
if (global.responsiveFrameScriptLoaded) {
return;
}
var Ci = Components.interfaces;
const gDeviceSizeWasPageSize = docShell.deviceSizeIsPageSize;
const gFloatingScrollbarsStylesheet = Services.io.newURI("chrome://devtools/skin/floating-scrollbars-responsive-design.css", null, null);
var gRequiresFloatingScrollbars;
var active = false;
var resizeNotifications = false;
addMessageListener("ResponsiveMode:Start", startResponsiveMode);
addMessageListener("ResponsiveMode:Stop", stopResponsiveMode);
addMessageListener("ResponsiveMode:IsActive", isActive);
function debug(msg) {
// dump(`RDM CHILD: ${msg}\n`);
}
/**
* Used by tests to verify the state of responsive mode.
*/
function isActive() {
sendAsyncMessage("ResponsiveMode:IsActive:Done", { active });
}
function startResponsiveMode({data:data}) {
debug("START");
if (active) {
debug("ALREADY STARTED");
sendAsyncMessage("ResponsiveMode:Start:Done");
return;
}
addMessageListener("ResponsiveMode:RequestScreenshot", screenshot);
let webProgress = docShell.QueryInterface(Ci.nsIInterfaceRequestor).getInterface(Ci.nsIWebProgress);
webProgress.addProgressListener(WebProgressListener, Ci.nsIWebProgress.NOTIFY_ALL);
docShell.deviceSizeIsPageSize = true;
gRequiresFloatingScrollbars = data.requiresFloatingScrollbars;
if (data.notifyOnResize) {
startOnResize();
}
// At this point, a content viewer might not be loaded for this
// docshell. makeScrollbarsFloating will be triggered by onLocationChange.
if (docShell.contentViewer) {
makeScrollbarsFloating();
}
active = true;
sendAsyncMessage("ResponsiveMode:Start:Done");
}
function onResize() {
let { width, height } = content.screen;
debug(`EMIT RESIZE: ${width} x ${height}`);
sendAsyncMessage("ResponsiveMode:OnContentResize", {
width,
height,
});
}
function bindOnResize() {
content.addEventListener("resize", onResize, false);
}
function startOnResize() {
debug("START ON RESIZE");
if (resizeNotifications) {
return;
}
resizeNotifications = true;
bindOnResize();
addEventListener("DOMWindowCreated", bindOnResize, false);
}
function stopOnResize() {
debug("STOP ON RESIZE");
if (!resizeNotifications) {
return;
}
resizeNotifications = false;
content.removeEventListener("resize", onResize, false);
removeEventListener("DOMWindowCreated", bindOnResize, false);
}
function stopResponsiveMode() {
debug("STOP");
if (!active) {
debug("ALREADY STOPPED, ABORT");
return;
}
active = false;
removeMessageListener("ResponsiveMode:RequestScreenshot", screenshot);
let webProgress = docShell.QueryInterface(Ci.nsIInterfaceRequestor).getInterface(Ci.nsIWebProgress);
webProgress.removeProgressListener(WebProgressListener);
docShell.deviceSizeIsPageSize = gDeviceSizeWasPageSize;
restoreScrollbars();
stopOnResize();
sendAsyncMessage("ResponsiveMode:Stop:Done");
}
function makeScrollbarsFloating() {
if (!gRequiresFloatingScrollbars) {
return;
}
let allDocShells = [docShell];
for (let i = 0; i < docShell.childCount; i++) {
let child = docShell.getChildAt(i).QueryInterface(Ci.nsIDocShell);
allDocShells.push(child);
}
for (let d of allDocShells) {
let win = d.contentViewer.DOMDocument.defaultView;
let winUtils = win.QueryInterface(Ci.nsIInterfaceRequestor).getInterface(Ci.nsIDOMWindowUtils);
try {
winUtils.loadSheet(gFloatingScrollbarsStylesheet, win.AGENT_SHEET);
} catch (e) { }
}
flushStyle();
}
function restoreScrollbars() {
let allDocShells = [docShell];
for (let i = 0; i < docShell.childCount; i++) {
allDocShells.push(docShell.getChildAt(i).QueryInterface(Ci.nsIDocShell));
}
for (let d of allDocShells) {
let win = d.contentViewer.DOMDocument.defaultView;
let winUtils = win.QueryInterface(Ci.nsIInterfaceRequestor).getInterface(Ci.nsIDOMWindowUtils);
try {
winUtils.removeSheet(gFloatingScrollbarsStylesheet, win.AGENT_SHEET);
} catch (e) { }
}
flushStyle();
}
function flushStyle() {
// Force presContext destruction
let isSticky = docShell.contentViewer.sticky;
docShell.contentViewer.sticky = false;
docShell.contentViewer.hide();
docShell.contentViewer.show();
docShell.contentViewer.sticky = isSticky;
}
function screenshot() {
let canvas = content.document.createElementNS("http://www.w3.org/1999/xhtml", "canvas");
let ratio = content.devicePixelRatio;
let width = content.innerWidth * ratio;
let height = content.innerHeight * ratio;
canvas.mozOpaque = true;
canvas.width = width;
canvas.height = height;
let ctx = canvas.getContext("2d");
ctx.scale(ratio, ratio);
ctx.drawWindow(content, content.scrollX, content.scrollY, width, height, "#fff");
sendAsyncMessage("ResponsiveMode:RequestScreenshot:Done", canvas.toDataURL());
}
var WebProgressListener = {
onLocationChange(webProgress, request, URI, flags) {
if (flags & Ci.nsIWebProgressListener.LOCATION_CHANGE_SAME_DOCUMENT) {
return;
}
makeScrollbarsFloating();
},
QueryInterface: function QueryInterface(aIID) {
if (aIID.equals(Ci.nsIWebProgressListener) ||
aIID.equals(Ci.nsISupportsWeakReference) ||
aIID.equals(Ci.nsISupports)) {
return this;
}
throw Components.results.NS_ERROR_NO_INTERFACE;
}
};
})();
global.responsiveFrameScriptLoaded = true;
sendAsyncMessage("ResponsiveMode:ChildScriptReady");
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