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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/. */
const Ci = Components.interfaces;
const gDeviceSizeWasPageSize = docShell.deviceSizeIsPageSize;
const gFloatingScrollbarsStylesheet = Services.io.newURI("chrome://browser/skin/devtools/floating-scrollbars.css", null, null);
let gRequiresFloatingScrollbars;
let active = false;
addMessageListener("ResponsiveMode:Start", startResponsiveMode);
addMessageListener("ResponsiveMode:Stop", stopResponsiveMode);
function startResponsiveMode({data:data}) {
if (active) {
return;
}
addMessageListener("ResponsiveMode:RequestScreenshot", screenshot);
addMessageListener("ResponsiveMode:NotifyOnResize", notifiyOnResize);
let webProgress = docShell.QueryInterface(Ci.nsIInterfaceRequestor).getInterface(Ci.nsIWebProgress);
webProgress.addProgressListener(WebProgressListener, Ci.nsIWebProgress.NOTIFY_ALL);
docShell.deviceSizeIsPageSize = true;
gRequiresFloatingScrollbars = data.requiresFloatingScrollbars;
// 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 notifiyOnResize() {
content.addEventListener("resize", () => {
sendAsyncMessage("ResponsiveMode:OnContentResize");
}, false);
sendAsyncMessage("ResponsiveMode:NotifyOnResize:Done");
}
function stopResponsiveMode() {
if (!active) {
return;
}
active = false;
removeMessageListener("ResponsiveMode:RequestScreenshot", screenshot);
removeMessageListener("ResponsiveMode:NotifyOnResize", notifiyOnResize);
let webProgress = docShell.QueryInterface(Ci.nsIInterfaceRequestor).getInterface(Ci.nsIWebProgress);
webProgress.removeProgressListener(WebProgressListener);
docShell.deviceSizeIsPageSize = gDeviceSizeWasPageSize;
restoreScrollbars();
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 width = content.innerWidth;
let height = content.innerHeight;
canvas.mozOpaque = true;
canvas.width = width;
canvas.height = height;
let ctx = canvas.getContext("2d");
ctx.drawWindow(content, content.scrollX, content.scrollY, width, height, "#fff");
sendAsyncMessage("ResponsiveMode:RequestScreenshot:Done", canvas.toDataURL());
}
let WebProgressListener = {
onLocationChange: function onLocationChange(aWebProgress) {
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;
}
};
sendAsyncMessage("ResponsiveMode:ChildScriptReady");
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