gecko-dev/browser/base/content/socialchat.xml
2015-04-09 12:27:36 +02:00

798 lines
30 KiB
XML

<?xml version="1.0"?>
<bindings id="socialChatBindings"
xmlns="http://www.mozilla.org/xbl"
xmlns:xbl="http://www.mozilla.org/xbl"
xmlns:xul="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">
<binding id="chatbox">
<content orient="vertical" mousethrough="never">
<xul:hbox class="chat-titlebar" xbl:inherits="minimized,selected,activity" align="baseline">
<xul:hbox flex="1" onclick="document.getBindingParent(this).onTitlebarClick(event);">
<xul:image class="chat-status-icon" xbl:inherits="src=image"/>
<xul:label class="chat-title" flex="1" xbl:inherits="value=label" crop="center"/>
</xul:hbox>
<xul:toolbarbutton anonid="webRTC-shareScreen-icon"
class="notification-anchor-icon chat-toolbarbutton"
oncommand="document.getBindingParent(this).showNotifications(this); event.stopPropagation();"/>
<xul:toolbarbutton anonid="webRTC-sharingScreen-icon"
class="notification-anchor-icon chat-toolbarbutton"
oncommand="document.getBindingParent(this).showNotifications(this); event.stopPropagation();"/>
<xul:toolbarbutton anonid="notification-icon" class="notification-anchor-icon chat-toolbarbutton"
oncommand="document.getBindingParent(this).showNotifications(this); event.stopPropagation();"/>
<xul:toolbarbutton anonid="minimize" class="chat-minimize-button chat-toolbarbutton"
oncommand="document.getBindingParent(this).toggle();"/>
<xul:toolbarbutton anonid="swap" class="chat-swap-button chat-toolbarbutton"
oncommand="document.getBindingParent(this).swapWindows();"/>
<xul:toolbarbutton anonid="close" class="chat-close-button chat-toolbarbutton"
oncommand="document.getBindingParent(this).close();"/>
</xul:hbox>
<xul:browser anonid="content" class="chat-frame" flex="1"
context="contentAreaContextMenu"
disableglobalhistory="true"
tooltip="aHTMLTooltip"
xbl:inherits="src,origin" type="content"/>
</content>
<implementation implements="nsIDOMEventListener">
<constructor><![CDATA[
const kAnchorMap = new Map([
["", "notification-"],
["webRTC-shareScreen-", ""],
["webRTC-sharingScreen-", ""]
]);
for (let [getterPrefix, idPrefix] of kAnchorMap) {
let getter = getterPrefix + "popupnotificationanchor";
let anonid = (idPrefix || getterPrefix) + "icon";
this.content.__defineGetter__(getter, () => {
delete this.content[getter];
return this.content[getter] = document.getAnonymousElementByAttribute(
this, "anonid", anonid);
});
}
if (!this.chatbar) {
document.getAnonymousElementByAttribute(this, "anonid", "minimize").hidden = true;
document.getAnonymousElementByAttribute(this, "anonid", "close").hidden = true;
}
let contentWindow = this.contentWindow;
// process this._callbacks, then set to null so the chatbox creator
// knows to make new callbacks immediately.
if (this._callbacks) {
for (let callback of this._callbacks) {
callback(this);
}
this._callbacks = null;
}
this.addEventListener("DOMContentLoaded", function DOMContentLoaded(event) {
if (event.target != this.contentDocument)
return;
this.removeEventListener("DOMContentLoaded", DOMContentLoaded, true);
this.isActive = !this.minimized;
this._deferredChatLoaded.resolve(this);
}, true);
// load content.js to support webrtc, fullscreen, etc.
this.addEventListener("load", function loaded(event) {
this.removeEventListener("load", loaded, true);
let mm = this.content.messageManager;
mm.loadFrameScript("chrome://browser/content/content.js", true);
}, true);
if (this.src)
this.setAttribute("src", this.src);
]]></constructor>
<field name="_deferredChatLoaded" readonly="true">
Promise.defer();
</field>
<property name="promiseChatLoaded">
<getter>
return this._deferredChatLoaded.promise;
</getter>
</property>
<field name="content" readonly="true">
document.getAnonymousElementByAttribute(this, "anonid", "content");
</field>
<property name="contentWindow">
<getter>
return this.content.contentWindow;
</getter>
</property>
<property name="contentDocument">
<getter>
return this.content.contentDocument;
</getter>
</property>
<property name="minimized">
<getter>
return this.getAttribute("minimized") == "true";
</getter>
<setter><![CDATA[
// Note that this.isActive is set via our transitionend handler so
// the content doesn't see intermediate values.
let parent = this.chatbar;
if (val) {
this.setAttribute("minimized", "true");
// If this chat is the selected one a new one needs to be selected.
if (parent && parent.selectedChat == this)
parent._selectAnotherChat();
} else {
this.removeAttribute("minimized");
// this chat gets selected.
if (parent)
parent.selectedChat = this;
}
]]></setter>
</property>
<property name="chatbar">
<getter>
if (this.parentNode.nodeName == "chatbar")
return this.parentNode;
return null;
</getter>
</property>
<property name="isActive">
<getter>
return this.content.docShell.isActive;
</getter>
<setter>
this.content.docShell.isActive = !!val;
// let the chat frame know if it is being shown or hidden
let evt = this.contentDocument.createEvent("CustomEvent");
evt.initCustomEvent(val ? "socialFrameShow" : "socialFrameHide", true, true, {});
this.contentDocument.documentElement.dispatchEvent(evt);
</setter>
</property>
<method name="showNotifications">
<parameter name="aAnchor"/>
<body><![CDATA[
PopupNotifications._reshowNotifications(aAnchor,
this.content);
]]></body>
</method>
<method name="swapDocShells">
<parameter name="aTarget"/>
<body><![CDATA[
aTarget.setAttribute("label", this.contentDocument.title);
if (this.getAttribute("dark") == "true")
aTarget.setAttribute("dark", "true");
aTarget.src = this.src;
aTarget.content.setAttribute("origin", this.content.getAttribute("origin"));
aTarget.content.popupnotificationanchor.className = this.content.popupnotificationanchor.className;
aTarget.content.swapDocShells(this.content);
]]></body>
</method>
<method name="onTitlebarClick">
<parameter name="aEvent"/>
<body><![CDATA[
if (!this.chatbar)
return;
if (aEvent.button == 0) { // left-click: toggle minimized.
this.toggle();
// if we restored it, we want to focus it.
if (!this.minimized)
this.chatbar.focus();
} else if (aEvent.button == 1) // middle-click: close chat
this.close();
]]></body>
</method>
<method name="close">
<body><![CDATA[
if (this.chatbar)
this.chatbar.remove(this);
else
window.close();
]]></body>
</method>
<method name="swapWindows">
<body><![CDATA[
let deferred = Promise.defer();
let title = this.getAttribute("label");
if (this.chatbar) {
this.chatbar.detachChatbox(this, { "centerscreen": "yes" }).then(
chatbox => {
chatbox.contentWindow.document.title = title;
deferred.resolve(chatbox);
}
);
} else {
// attach this chatbox to the topmost browser window
let Chat = Cu.import("resource:///modules/Chat.jsm").Chat;
let win = Chat.findChromeWindowForChats();
let chatbar = win.document.getElementById("pinnedchats");
let origin = this.content.getAttribute("origin");
let cb = chatbar.openChat(origin, title, "about:blank");
cb.promiseChatLoaded.then(
() => {
this.swapDocShells(cb);
chatbar.focus();
this.close();
// chatboxForURL is a map of URL -> chatbox used to avoid opening
// duplicate chat windows. Ensure reattached chat windows aren't
// registered with about:blank as their URL, otherwise reattaching
// more than one chat window isn't possible.
chatbar.chatboxForURL.delete("about:blank");
chatbar.chatboxForURL.set(this.src, Cu.getWeakReference(cb));
deferred.resolve(cb);
}
);
}
return deferred.promise;
]]></body>
</method>
<method name="toggle">
<body><![CDATA[
this.minimized = !this.minimized;
]]></body>
</method>
</implementation>
<handlers>
<handler event="focus" phase="capturing">
if (this.chatbar)
this.chatbar.selectedChat = this;
</handler>
<handler event="DOMTitleChanged"><![CDATA[
this.setAttribute('label', this.contentDocument.title);
if (this.chatbar)
this.chatbar.updateTitlebar(this);
]]></handler>
<handler event="DOMLinkAdded"><![CDATA[
// much of this logic is from DOMLinkHandler in browser.js
// this sets the presence icon for a chat user, we simply use favicon style updating
let link = event.originalTarget;
let rel = link.rel && link.rel.toLowerCase();
if (!link || !link.ownerDocument || !rel || !link.href)
return;
if (link.rel.indexOf("icon") < 0)
return;
let ContentLinkHandler = Cu.import("resource:///modules/ContentLinkHandler.jsm", {}).ContentLinkHandler;
let uri = ContentLinkHandler.getLinkIconURI(link);
if (!uri)
return;
// we made it this far, use it
this.setAttribute('image', uri.spec);
if (this.chatbar)
this.chatbar.updateTitlebar(this);
]]></handler>
<handler event="transitionend">
if (this.isActive == this.minimized)
this.isActive = !this.minimized;
</handler>
</handlers>
</binding>
<binding id="chatbar">
<content>
<xul:hbox align="end" pack="end" anonid="innerbox" class="chatbar-innerbox" mousethrough="always" flex="1">
<xul:spacer flex="1" anonid="spacer" class="chatbar-overflow-spacer"/>
<xul:toolbarbutton anonid="nub" class="chatbar-button" type="menu" collapsed="true" mousethrough="never">
<xul:menupopup anonid="nubMenu" oncommand="document.getBindingParent(this).showChat(event.target.chat)"/>
</xul:toolbarbutton>
<children/>
</xul:hbox>
</content>
<implementation implements="nsIDOMEventListener">
<constructor>
// to avoid reflows we cache the width of the nub.
this.cachedWidthNub = 0;
this._selectedChat = null;
</constructor>
<field name="innerbox" readonly="true">
document.getAnonymousElementByAttribute(this, "anonid", "innerbox");
</field>
<field name="menupopup" readonly="true">
document.getAnonymousElementByAttribute(this, "anonid", "nubMenu");
</field>
<field name="nub" readonly="true">
document.getAnonymousElementByAttribute(this, "anonid", "nub");
</field>
<method name="focus">
<body><![CDATA[
if (!this.selectedChat)
return;
Services.focus.focusedWindow = this.selectedChat.contentWindow;
]]></body>
</method>
<method name="_isChatFocused">
<parameter name="aChatbox"/>
<body><![CDATA[
// If there are no XBL bindings for the chat it can't be focused.
if (!aChatbox.content)
return false;
let fw = Services.focus.focusedWindow;
if (!fw)
return false;
// We want to see if the focused window is in the subtree below our browser...
let containingBrowser = fw.QueryInterface(Ci.nsIInterfaceRequestor)
.getInterface(Ci.nsIWebNavigation)
.QueryInterface(Ci.nsIDocShell)
.chromeEventHandler;
return containingBrowser == aChatbox.content;
]]></body>
</method>
<property name="selectedChat">
<getter><![CDATA[
return this._selectedChat;
]]></getter>
<setter><![CDATA[
// this is pretty horrible, but we:
// * want to avoid doing touching 'selected' attribute when the
// specified chat is already selected.
// * remove 'activity' attribute on newly selected tab *even if*
// newly selected is already selected.
// * need to handle either current or new being null.
if (this._selectedChat != val) {
if (this._selectedChat) {
this._selectedChat.removeAttribute("selected");
}
this._selectedChat = val;
if (val) {
this._selectedChat.setAttribute("selected", "true");
}
}
if (val) {
this._selectedChat.removeAttribute("activity");
}
]]></setter>
</property>
<field name="menuitemMap">new WeakMap()</field>
<field name="chatboxForURL">new Map();</field>
<property name="hasCollapsedChildren">
<getter><![CDATA[
return !!this.querySelector("[collapsed]");
]]></getter>
</property>
<property name="collapsedChildren">
<getter><![CDATA[
// A generator yielding all collapsed chatboxes, in the order in
// which they should be restored.
let child = this.lastElementChild;
while (child) {
if (child.collapsed)
yield child;
child = child.previousElementSibling;
}
]]></getter>
</property>
<property name="visibleChildren">
<getter><![CDATA[
// A generator yielding all non-collapsed chatboxes.
let child = this.firstElementChild;
while (child) {
if (!child.collapsed)
yield child;
child = child.nextElementSibling;
}
]]></getter>
</property>
<property name="collapsibleChildren">
<getter><![CDATA[
// A generator yielding all children which are able to be collapsed
// in the order in which they should be collapsed.
// (currently this is all visible ones other than the selected one.)
for (let child of this.visibleChildren)
if (child != this.selectedChat)
yield child;
]]></getter>
</property>
<method name="_selectAnotherChat">
<body><![CDATA[
// Select a different chat (as the currently selected one is no
// longer suitable as the selection - maybe it is being minimized or
// closed.) We only select non-minimized and non-collapsed chats,
// and if none are found, set the selectedChat to null.
// It's possible in the future we will track most-recently-selected
// chats or similar to find the "best" candidate - for now though
// the choice is somewhat arbitrary.
let moveFocus = this.selectedChat && this._isChatFocused(this.selectedChat);
for (let other of this.children) {
if (other != this.selectedChat && !other.minimized && !other.collapsed) {
this.selectedChat = other;
if (moveFocus)
this.focus();
return;
}
}
// can't find another - so set no chat as selected.
this.selectedChat = null;
]]></body>
</method>
<method name="updateTitlebar">
<parameter name="aChatbox"/>
<body><![CDATA[
if (aChatbox.collapsed) {
let menuitem = this.menuitemMap.get(aChatbox);
if (aChatbox.getAttribute("activity")) {
menuitem.setAttribute("activity", true);
this.nub.setAttribute("activity", true);
}
menuitem.setAttribute("label", aChatbox.getAttribute("label"));
menuitem.setAttribute("image", aChatbox.getAttribute("image"));
}
]]></body>
</method>
<method name="calcTotalWidthOf">
<parameter name="aElement"/>
<body><![CDATA[
let cs = document.defaultView.getComputedStyle(aElement);
let margins = parseInt(cs.marginLeft) + parseInt(cs.marginRight);
return aElement.getBoundingClientRect().width + margins;
]]></body>
</method>
<method name="getTotalChildWidth">
<parameter name="aChatbox"/>
<body><![CDATA[
// These are from the CSS for the chatbox and must be kept in sync.
// We can't use calcTotalWidthOf due to the transitions...
const CHAT_WIDTH_OPEN = 260;
const CHAT_WIDTH_MINIMIZED = 160;
let openWidth = aChatbox.hasAttribute("large") ? 300 : CHAT_WIDTH_OPEN;
return aChatbox.minimized ? CHAT_WIDTH_MINIMIZED : openWidth;
]]></body>
</method>
<method name="collapseChat">
<parameter name="aChatbox"/>
<body><![CDATA[
// we ensure that the cached width for a child of this type is
// up-to-date so we can use it when resizing.
this.getTotalChildWidth(aChatbox);
aChatbox.collapsed = true;
aChatbox.isActive = false;
let menu = document.createElementNS("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul", "menuitem");
menu.setAttribute("class", "menuitem-iconic");
menu.setAttribute("label", aChatbox.contentDocument.title);
menu.setAttribute("image", aChatbox.getAttribute("image"));
menu.chat = aChatbox;
this.menuitemMap.set(aChatbox, menu);
this.menupopup.appendChild(menu);
this.nub.collapsed = false;
]]></body>
</method>
<method name="showChat">
<parameter name="aChatbox"/>
<parameter name="aMode"/>
<body><![CDATA[
if ((aMode != "minimized") && aChatbox.minimized)
aChatbox.minimized = false;
if (this.selectedChat != aChatbox)
this.selectedChat = aChatbox;
if (!aChatbox.collapsed)
return; // already showing - no more to do.
this._showChat(aChatbox);
// showing a collapsed chat might mean another needs to be collapsed
// to make room...
this.resize();
]]></body>
</method>
<method name="_showChat">
<parameter name="aChatbox"/>
<body><![CDATA[
// the actual implementation - doesn't check for overflow, assumes
// collapsed, etc.
let menuitem = this.menuitemMap.get(aChatbox);
this.menuitemMap.delete(aChatbox);
this.menupopup.removeChild(menuitem);
aChatbox.collapsed = false;
aChatbox.isActive = !aChatbox.minimized;
]]></body>
</method>
<method name="remove">
<parameter name="aChatbox"/>
<body><![CDATA[
this._remove(aChatbox);
// The removal of a chat may mean a collapsed one can spring up,
// or that the popup should be hidden. We also defer the selection
// of another chat until after a resize, as a new candidate may
// become uncollapsed after the resize.
this.resize();
if (this.selectedChat == aChatbox) {
this._selectAnotherChat();
}
]]></body>
</method>
<method name="_remove">
<parameter name="aChatbox"/>
<body><![CDATA[
this.removeChild(aChatbox);
// child might have been collapsed.
let menuitem = this.menuitemMap.get(aChatbox);
if (menuitem) {
this.menuitemMap.delete(aChatbox);
this.menupopup.removeChild(menuitem);
}
this.chatboxForURL.delete(aChatbox.src);
]]></body>
</method>
<method name="openChat">
<parameter name="aOrigin"/>
<parameter name="aTitle"/>
<parameter name="aURL"/>
<parameter name="aMode"/>
<parameter name="aCallback"/>
<body><![CDATA[
let cb = this.chatboxForURL.get(aURL);
if (cb) {
cb = cb.get();
// A chatbox is still alive to us when it's parented and still has
// content.
if (cb.parentNode && cb.contentWindow) {
this.showChat(cb, aMode);
if (aCallback) {
if (cb._callbacks == null) {
// Chatbox has already been created, so callback now.
aCallback(cb);
} else {
// Chatbox is yet to have bindings created...
cb._callbacks.push(aCallback);
}
}
return cb;
}
this.chatboxForURL.delete(aURL);
}
cb = document.createElementNS("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul", "chatbox");
cb._callbacks = [];
if (aCallback) {
// _callbacks is a javascript property instead of a <field> as it
// must exist before the (possibly delayed) bindings are created.
cb._callbacks.push(aCallback);
}
// src also a javascript property; the src attribute is set in the ctor.
cb.src = aURL;
if (aMode == "minimized")
cb.setAttribute("minimized", "true");
cb.setAttribute("origin", aOrigin);
cb.setAttribute("label", aTitle);
this.insertBefore(cb, this.firstChild);
this.selectedChat = cb;
this.chatboxForURL.set(aURL, Cu.getWeakReference(cb));
this.resize();
return cb;
]]></body>
</method>
<method name="resize">
<body><![CDATA[
// Checks the current size against the collapsed state of children
// and collapses or expands as necessary such that as many as possible
// are shown.
// So 2 basic strategies:
// * Collapse/Expand one at a time until we can't collapse/expand any
// more - but this is one reflow per change.
// * Calculate the dimensions ourself and choose how many to collapse
// or expand based on this, then do them all in one go. This is one
// reflow regardless of how many we change.
// So we go the more complicated but more efficient second option...
let availWidth = this.getBoundingClientRect().width;
let currentWidth = 0;
if (!this.nub.collapsed) { // the nub is visible.
if (!this.cachedWidthNub)
this.cachedWidthNub = this.calcTotalWidthOf(this.nub);
currentWidth += this.cachedWidthNub;
}
for (let child of this.visibleChildren) {
currentWidth += this.getTotalChildWidth(child);
}
if (currentWidth > availWidth) {
// we need to collapse some.
let toCollapse = [];
for (let child of this.collapsibleChildren) {
if (currentWidth <= availWidth)
break;
toCollapse.push(child);
currentWidth -= this.getTotalChildWidth(child);
}
if (toCollapse.length) {
for (let child of toCollapse)
this.collapseChat(child);
}
} else if (currentWidth < availWidth) {
// we *might* be able to expand some - see how many.
// XXX - if this was clever, it could know when removing the nub
// leaves enough space to show all collapsed
let toShow = [];
for (let child of this.collapsedChildren) {
currentWidth += this.getTotalChildWidth(child);
if (currentWidth > availWidth)
break;
toShow.push(child);
}
for (let child of toShow)
this._showChat(child);
// If none remain collapsed remove the nub.
if (!this.hasCollapsedChildren) {
this.nub.collapsed = true;
}
}
// else: achievement unlocked - we are pixel-perfect!
]]></body>
</method>
<method name="handleEvent">
<parameter name="aEvent"/>
<body><![CDATA[
if (aEvent.type == "resize") {
this.resize();
}
]]></body>
</method>
<method name="_getDragTarget">
<parameter name="event"/>
<body><![CDATA[
return event.target.localName == "chatbox" ? event.target : null;
]]></body>
</method>
<!-- Moves a chatbox to a new window. Returns a promise that is resolved
once the move to the other window is complete.
-->
<method name="detachChatbox">
<parameter name="aChatbox"/>
<parameter name="aOptions"/>
<body><![CDATA[
let deferred = Promise.defer();
let chatbar = this;
let options = "";
for (let name in aOptions)
options += "," + name + "=" + aOptions[name];
let otherWin = window.openDialog("chrome://browser/content/chatWindow.xul",
"_blank", "chrome,all,dialog=no" + options);
otherWin.addEventListener("load", function _chatLoad(event) {
if (event.target != otherWin.document)
return;
let detachEvent = new aChatbox.contentWindow.CustomEvent("socialFrameDetached", {
bubbles: true,
cancelable: true,
});
aChatbox.contentDocument.dispatchEvent(detachEvent);
otherWin.removeEventListener("load", _chatLoad, true);
let otherChatbox = otherWin.document.getElementById("chatter");
aChatbox.swapDocShells(otherChatbox);
aChatbox.close();
chatbar.chatboxForURL.set(aChatbox.src, Cu.getWeakReference(otherChatbox));
deferred.resolve(otherChatbox);
}, true);
return deferred.promise;
]]></body>
</method>
</implementation>
<handlers>
<handler event="popupshown"><![CDATA[
this.nub.removeAttribute("activity");
]]></handler>
<handler event="load"><![CDATA[
window.addEventListener("resize", this, true);
]]></handler>
<handler event="unload"><![CDATA[
window.removeEventListener("resize", this, true);
]]></handler>
<handler event="dragstart"><![CDATA[
// chat window dragging is essentially duplicated from tabbrowser.xml
// to acheive the same visual experience
let chatbox = this._getDragTarget(event);
if (!chatbox) {
return;
}
let dt = event.dataTransfer;
// we do not set a url in the drag data to prevent moving to tabbrowser
// or otherwise having unexpected drop handlers do something with our
// chatbox
dt.mozSetDataAt("application/x-moz-chatbox", chatbox, 0);
// Set the cursor to an arrow during tab drags.
dt.mozCursor = "default";
// Create a canvas to which we capture the current tab.
// Until canvas is HiDPI-aware (bug 780362), we need to scale the desired
// canvas size (in CSS pixels) to the window's backing resolution in order
// to get a full-resolution drag image for use on HiDPI displays.
let windowUtils = window.getInterface(Ci.nsIDOMWindowUtils);
let scale = windowUtils.screenPixelsPerCSSPixel / windowUtils.fullZoom;
let canvas = document.createElementNS("http://www.w3.org/1999/xhtml", "canvas");
canvas.mozOpaque = true;
canvas.width = 160 * scale;
canvas.height = 90 * scale;
PageThumbs.captureToCanvas(chatbox, canvas);
dt.setDragImage(canvas, -16 * scale, -16 * scale);
event.stopPropagation();
]]></handler>
<handler event="dragend"><![CDATA[
let dt = event.dataTransfer;
let draggedChat = dt.mozGetDataAt("application/x-moz-chatbox", 0);
if (dt.mozUserCancelled || dt.dropEffect != "none") {
return;
}
let eX = event.screenX;
let eY = event.screenY;
// screen.availLeft et. al. only check the screen that this window is on,
// but we want to look at the screen the tab is being dropped onto.
let sX = {}, sY = {}, sWidth = {}, sHeight = {};
Cc["@mozilla.org/gfx/screenmanager;1"]
.getService(Ci.nsIScreenManager)
.screenForRect(eX, eY, 1, 1)
.GetAvailRect(sX, sY, sWidth, sHeight);
// default size for the chat window as used in chatWindow.xul, use them
// here to attempt to keep the window fully within the screen when
// opening at the drop point. If the user has resized the window to
// something larger (which gets persisted), at least a good portion of
// the window should still be within the screen.
let winWidth = 400;
let winHeight = 420;
// ensure new window entirely within screen
let left = Math.min(Math.max(eX, sX.value),
sX.value + sWidth.value - winWidth);
let top = Math.min(Math.max(eY, sY.value),
sY.value + sHeight.value - winHeight);
let title = draggedChat.content.getAttribute("title");
this.detachChatbox(draggedChat, { screenX: left, screenY: top }).then(
chatbox => {
chatbox.contentWindow.document.title = title;
}
);
event.stopPropagation();
]]></handler>
</handlers>
</binding>
</bindings>