Add m-esr52 at 52.6.0

7 files changed, 657 insertions, 0 deletions

diff --git a/toolkit/components/prompts/content/commonDialog.css b/toolkit/components/prompts/content/commonDialog.css
new file mode 100644
index 000000000..89f88db7a
--- /dev/null
+++ b/toolkit/components/prompts/content/commonDialog.css
@@ -0,0 +1,22 @@
+/* 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/. */
+
+@namespace url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"); /* set default namespace to XUL */
+
+#infoContainer {
+  max-width: 45em;
+}
+
+#info\.body {
+  -moz-user-focus: normal;
+  -moz-user-select: text;
+  cursor: text !important;
+  white-space: pre-wrap;
+  unicode-bidi: plaintext;
+}
+
+#loginLabel, #password1Label {
+  text-align: right;
+}
+
diff --git a/toolkit/components/prompts/content/commonDialog.js b/toolkit/components/prompts/content/commonDialog.js
new file mode 100644
index 000000000..ef4686654
--- /dev/null
+++ b/toolkit/components/prompts/content/commonDialog.js
@@ -0,0 +1,62 @@
+/* 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/. */
+
+var Ci = Components.interfaces;
+var Cr = Components.results;
+var Cc = Components.classes;
+var Cu = Components.utils;
+
+Cu.import("resource://gre/modules/Services.jsm");
+Cu.import("resource://gre/modules/CommonDialog.jsm");
+
+var propBag, args, Dialog;
+
+function commonDialogOnLoad() {
+    propBag = window.arguments[0].QueryInterface(Ci.nsIWritablePropertyBag2)
+                                 .QueryInterface(Ci.nsIWritablePropertyBag);
+    // Convert to a JS object
+    args = {};
+    let propEnum = propBag.enumerator;
+    while (propEnum.hasMoreElements()) {
+        let prop = propEnum.getNext().QueryInterface(Ci.nsIProperty);
+        args[prop.name] = prop.value;
+    }
+
+    let dialog = document.documentElement;
+
+    let ui = {
+        prompt             : window,
+        loginContainer     : document.getElementById("loginContainer"),
+        loginTextbox       : document.getElementById("loginTextbox"),
+        loginLabel         : document.getElementById("loginLabel"),
+        password1Container : document.getElementById("password1Container"),
+        password1Textbox   : document.getElementById("password1Textbox"),
+        password1Label     : document.getElementById("password1Label"),
+        infoBody           : document.getElementById("info.body"),
+        infoTitle          : document.getElementById("info.title"),
+        infoIcon           : document.getElementById("info.icon"),
+        checkbox           : document.getElementById("checkbox"),
+        checkboxContainer  : document.getElementById("checkboxContainer"),
+        button3            : dialog.getButton("extra2"),
+        button2            : dialog.getButton("extra1"),
+        button1            : dialog.getButton("cancel"),
+        button0            : dialog.getButton("accept"),
+        focusTarget        : window,
+    };
+
+    // limit the dialog to the screen width
+    document.getElementById("filler").maxWidth = screen.availWidth;
+
+    Dialog = new CommonDialog(args, ui);
+    Dialog.onLoad(dialog);
+    // resize the window to the content
+    window.sizeToContent();
+    window.getAttention();
+}
+
+function commonDialogOnUnload() {
+    // Convert args back into property bag
+    for (let propName in args)
+        propBag.setProperty(propName, args[propName]);
+}
diff --git a/toolkit/components/prompts/content/commonDialog.xul b/toolkit/components/prompts/content/commonDialog.xul
new file mode 100644
index 000000000..990b26586
--- /dev/null
+++ b/toolkit/components/prompts/content/commonDialog.xul
@@ -0,0 +1,97 @@
+<?xml version="1.0"?>
+<!-- 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/. -->
+
+
+<?xml-stylesheet href="chrome://global/skin/" type="text/css"?>
+<?xml-stylesheet href="chrome://global/content/commonDialog.css" type="text/css"?>
+<?xml-stylesheet href="chrome://global/skin/commonDialog.css" type="text/css"?>
+
+<!DOCTYPE dialog SYSTEM "chrome://global/locale/commonDialog.dtd">
+
+<dialog id="commonDialog"
+        xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
+        aria-describedby="info.body"
+        onunload="commonDialogOnUnload();"
+        ondialogaccept="Dialog.onButton0(); return true;"
+        ondialogcancel="Dialog.onButton1(); return true;"
+        ondialogextra1="Dialog.onButton2(); window.close();"
+        ondialogextra2="Dialog.onButton3(); window.close();"
+        buttonpack="center">
+
+  <script type="application/javascript" src="chrome://global/content/commonDialog.js"/>
+  <script type="application/javascript" src="chrome://global/content/globalOverlay.js"/>
+  <script type="application/javascript">
+    document.addEventListener("DOMContentLoaded", function() {
+      commonDialogOnLoad();
+    });
+  </script>
+
+  <commandset id="selectEditMenuItems">
+    <command id="cmd_copy" oncommand="goDoCommand('cmd_copy')" disabled="true"/>
+    <command id="cmd_selectAll" oncommand="goDoCommand('cmd_selectAll')"/>
+  </commandset>
+
+  <popupset id="contentAreaContextSet">
+    <menupopup id="contentAreaContextMenu"
+               onpopupshowing="goUpdateCommand('cmd_copy')">
+      <menuitem id="context-copy"
+                label="&copyCmd.label;"
+                accesskey="&copyCmd.accesskey;"
+                command="cmd_copy"
+                disabled="true"/>
+      <menuitem id="context-selectall"
+                label="&selectAllCmd.label;"
+                accesskey="&selectAllCmd.accesskey;"
+                command="cmd_selectAll"/>
+    </menupopup>
+  </popupset>
+
+  <hbox id="filler" style="min-width: 0%;">
+    <spacer style="width: 29em;"/>
+  </hbox>
+
+  <grid>
+    <columns>
+      <column/>
+      <column flex="1"/>
+    </columns>
+
+    <rows>
+      <row>
+        <hbox id="iconContainer" align="start">
+          <image id="info.icon" class="spaced"/>
+        </hbox>
+        <vbox id="infoContainer"
+#ifndef XP_MACOSX
+              pack="center"
+#endif
+        >
+          <!-- Only shown on OS X, since it has no dialog title -->
+          <description id="info.title"
+#ifndef XP_MACOSX
+            hidden="true"
+#else
+            style="margin-bottom: 1em"
+#endif
+          />
+          <description id="info.body" context="contentAreaContextMenu" noinitialfocus="true"/>
+        </vbox>
+      </row>
+      <row id="loginContainer" hidden="true" align="center">
+        <label id="loginLabel" value="&editfield0.label;" control="loginTextbox"/>
+        <textbox id="loginTextbox"/>
+      </row>
+      <row id ="password1Container" hidden="true" align="center">
+        <label id="password1Label" value="&editfield1.label;" control="password1Textbox"/>
+        <textbox type="password" id="password1Textbox"/>
+      </row>
+      <row id="checkboxContainer" hidden="true">
+        <spacer/>
+        <checkbox id="checkbox" oncommand="Dialog.onCheckbox()"/>
+      </row>
+    </rows>
+  </grid>
+
+</dialog>
diff --git a/toolkit/components/prompts/content/selectDialog.js b/toolkit/components/prompts/content/selectDialog.js
new file mode 100644
index 000000000..7628dc8d9
--- /dev/null
+++ b/toolkit/components/prompts/content/selectDialog.js
@@ -0,0 +1,67 @@
+/* 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/. */
+
+var Ci = Components.interfaces;
+var Cr = Components.results;
+var Cc = Components.classes;
+var Cu = Components.utils;
+
+var gArgs, listBox;
+
+function dialogOnLoad() {
+    gArgs = window.arguments[0].QueryInterface(Ci.nsIWritablePropertyBag2)
+                               .QueryInterface(Ci.nsIWritablePropertyBag);
+
+    let promptType = gArgs.getProperty("promptType");
+    if (promptType != "select") {
+        Cu.reportError("selectDialog opened for unknown type: " + promptType);
+        window.close();
+    }
+
+    // Default to canceled.
+    gArgs.setProperty("ok", false);
+
+    document.title = gArgs.getProperty("title");
+
+    let text = gArgs.getProperty("text");
+    document.getElementById("info.txt").setAttribute("value", text);
+
+    let items = gArgs.getProperty("list");
+    listBox = document.getElementById("list");
+
+    for (let i = 0; i < items.length; i++) {
+        let str = items[i];
+        if (str == "")
+            str = "<>";
+        listBox.appendItem(str);
+        listBox.getItemAtIndex(i).addEventListener("dblclick", dialogDoubleClick, false);
+    }
+    listBox.selectedIndex = 0;
+    listBox.focus();
+
+    // resize the window to the content
+    window.sizeToContent();
+
+    // Move to the right location
+    moveToAlertPosition();
+    centerWindowOnScreen();
+
+    // play sound
+    try {
+        Cc["@mozilla.org/sound;1"].
+        createInstance(Ci.nsISound).
+        playEventSound(Ci.nsISound.EVENT_SELECT_DIALOG_OPEN);
+    } catch (e) { }
+}
+
+function dialogOK() {
+    gArgs.setProperty("selected", listBox.selectedIndex);
+    gArgs.setProperty("ok", true);
+    return true;
+}
+
+function dialogDoubleClick() {
+    dialogOK();
+    window.close();
+}
diff --git a/toolkit/components/prompts/content/selectDialog.xul b/toolkit/components/prompts/content/selectDialog.xul
new file mode 100644
index 000000000..9b72bcfb0
--- /dev/null
+++ b/toolkit/components/prompts/content/selectDialog.xul
@@ -0,0 +1,22 @@
+<?xml version="1.0"?>
+
+<!-- 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/. -->
+
+<?xml-stylesheet href="chrome://global/skin/global.css" type="text/css"?>
+<!DOCTYPE dialog SYSTEM "chrome://global/locale/commonDialog.dtd">
+
+<dialog xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
+      onload="dialogOnLoad()"
+      ondialogaccept="return dialogOK();">
+
+  <script type="application/javascript" src="chrome://global/content/selectDialog.js" />
+  <keyset id="dialogKeys"/>
+  <vbox style="width: 24em;margin: 5px;">
+    <label id="info.txt"/>
+    <vbox>
+      <listbox id="list" rows="4" flex="1"/>
+    </vbox>
+  </vbox>
+</dialog>
diff --git a/toolkit/components/prompts/content/tabprompts.css b/toolkit/components/prompts/content/tabprompts.css
new file mode 100644
index 000000000..c4b0f7593
--- /dev/null
+++ b/toolkit/components/prompts/content/tabprompts.css
@@ -0,0 +1,35 @@
+/* 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/. */
+
+/* Tab Modal Prompt boxes */
+tabmodalprompt {
+  width: 100%;
+  height: 100%;
+  -moz-box-pack: center;
+  -moz-box-orient: vertical;
+}
+
+.mainContainer {
+  min-width: 20em;
+  min-height: 12em;
+  -moz-user-focus: normal;
+}
+
+.info\.title {
+  margin-bottom: 1em !important;
+  font-weight: bold;
+}
+
+.info\.body {
+  margin: 0 !important;
+  -moz-user-focus: normal;
+  -moz-user-select: text;
+  cursor: text !important;
+  white-space: pre-wrap;
+  unicode-bidi: plaintext;
+}
+
+label[value=""] {
+  visibility: collapse;
+}
diff --git a/toolkit/components/prompts/content/tabprompts.xml b/toolkit/components/prompts/content/tabprompts.xml
new file mode 100644
index 000000000..07c6c8efb
--- /dev/null
+++ b/toolkit/components/prompts/content/tabprompts.xml
@@ -0,0 +1,352 @@
+<?xml version="1.0"?>
+<!-- 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/. -->
+
+<!DOCTYPE bindings [
+<!ENTITY % commonDialogDTD  SYSTEM "chrome://global/locale/commonDialog.dtd">
+<!ENTITY % dialogOverlayDTD SYSTEM "chrome://global/locale/dialogOverlay.dtd">
+%commonDialogDTD;
+%dialogOverlayDTD;
+]>
+
+<bindings id="tabPrompts"
+   xmlns="http://www.mozilla.org/xbl"
+   xmlns:xul="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
+   xmlns:xbl="http://www.mozilla.org/xbl">
+
+  <binding id="tabmodalprompt">
+
+    <resources>
+        <stylesheet src="chrome://global/content/tabprompts.css"/>
+        <stylesheet src="chrome://global/skin/tabprompts.css"/>
+    </resources>
+
+    <xbl:content xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
+                 role="dialog"
+                 aria-describedby="info.body">
+
+        <!-- This is based on the guts of commonDialog.xul -->
+        <spacer flex="1"/>
+        <hbox pack="center">
+            <vbox anonid="mainContainer" class="mainContainer">
+                <grid class="topContainer" flex="1">
+                    <columns>
+                        <column/>
+                        <column flex="1"/>
+                    </columns>
+
+                    <rows>
+                        <vbox anonid="infoContainer" align="center" pack="center" flex="1">
+                            <description anonid="info.title" class="info.title" hidden="true" />
+                            <description anonid="info.body" class="info.body"/>
+                        </vbox>
+
+                        <row anonid="loginContainer" hidden="true" align="center">
+                            <label anonid="loginLabel" value="&editfield0.label;" control="loginTextbox"/>
+                            <textbox anonid="loginTextbox"/>
+                        </row>
+
+                        <row anonid="password1Container" hidden="true" align="center">
+                            <label anonid="password1Label" value="&editfield1.label;" control="password1Textbox"/>
+                            <textbox anonid="password1Textbox" type="password"/>
+                        </row>
+
+                        <row anonid="checkboxContainer" hidden="true">
+                            <spacer/>
+                            <checkbox anonid="checkbox"/>
+                        </row>
+
+                        <xbl:children includes="row"/>
+                    </rows>
+                </grid>
+                <xbl:children/>
+                <hbox class="buttonContainer">
+#ifdef XP_UNIX
+                    <button anonid="button3" hidden="true"/>
+                    <button anonid="button2" hidden="true"/>
+                    <spacer anonid="buttonSpacer" flex="1"/>
+                    <button anonid="button1" label="&cancelButton.label;"/>
+                    <button anonid="button0" label="&okButton.label;"/>
+#else
+                    <button anonid="button3" hidden="true"/>
+                    <spacer anonid="buttonSpacer" flex="1"/>
+                    <button anonid="button0" label="&okButton.label;"/>
+                    <button anonid="button2" hidden="true"/>
+                    <button anonid="button1" label="&cancelButton.label;"/>
+#endif
+                </hbox>
+            </vbox>
+        </hbox>
+        <spacer flex="2"/>
+    </xbl:content>
+
+    <implementation implements="nsIDOMEventListener">
+        <constructor>
+        <![CDATA[
+            let self = this;
+            function getElement(anonid) {
+                return document.getAnonymousElementByAttribute(self, "anonid", anonid);
+            }
+
+            this.ui = {
+                prompt             : this,
+                loginContainer     : getElement("loginContainer"),
+                loginTextbox       : getElement("loginTextbox"),
+                loginLabel         : getElement("loginLabel"),
+                password1Container : getElement("password1Container"),
+                password1Textbox   : getElement("password1Textbox"),
+                password1Label     : getElement("password1Label"),
+                infoBody           : getElement("info.body"),
+                infoTitle          : getElement("info.title"),
+                infoIcon           : null,
+                checkbox           : getElement("checkbox"),
+                checkboxContainer  : getElement("checkboxContainer"),
+                button3            : getElement("button3"),
+                button2            : getElement("button2"),
+                button1            : getElement("button1"),
+                button0            : getElement("button0"),
+                // focusTarget (for BUTTON_DELAY_ENABLE) not yet supported
+            };
+
+            this.ui.button0.addEventListener("command", this.onButtonClick.bind(this, 0), false);
+            this.ui.button1.addEventListener("command", this.onButtonClick.bind(this, 1), false);
+            this.ui.button2.addEventListener("command", this.onButtonClick.bind(this, 2), false);
+            this.ui.button3.addEventListener("command", this.onButtonClick.bind(this, 3), false);
+            // Anonymous wrapper used here because |Dialog| doesn't exist until init() is called!
+            this.ui.checkbox.addEventListener("command", function() { self.Dialog.onCheckbox(); }, false);
+            this.isLive = false;
+        ]]>
+        </constructor>
+        <destructor>
+        <![CDATA[
+            if (this.isLive) {
+                this.abortPrompt();
+            }
+        ]]>
+        </destructor>
+
+        <field name="ui"/>
+        <field name="args"/>
+        <field name="linkedTab"/>
+        <field name="onCloseCallback"/>
+        <field name="Dialog"/>
+        <field name="isLive"/>
+        <field name="availWidth"/>
+        <field name="availHeight"/>
+        <field name="minWidth"/>
+        <field name="minHeight"/>
+
+        <method name="init">
+            <parameter name="args"/>
+            <parameter name="linkedTab"/>
+            <parameter name="onCloseCallback"/>
+            <body>
+            <![CDATA[
+                this.args = args;
+                this.linkedTab = linkedTab;
+                this.onCloseCallback = onCloseCallback;
+
+                if (args.enableDelay)
+                    throw "BUTTON_DELAY_ENABLE not yet supported for tab-modal prompts";
+
+                // We need to remove the prompt when the tab or browser window is closed or
+                // the page navigates, else we never unwind the event loop and that's sad times.
+                // Remember to cleanup in shutdownPrompt()!
+                this.isLive = true;
+                window.addEventListener("resize", this, false);
+                window.addEventListener("unload", this, false);
+                linkedTab.addEventListener("TabClose", this, false);
+                // Note:
+                // nsPrompter.js or in e10s mode browser-parent.js call abortPrompt,
+                // when the domWindow, for which the prompt was created, generates
+                // a "pagehide" event.
+
+                let tmp = {};
+                Components.utils.import("resource://gre/modules/CommonDialog.jsm", tmp);
+                this.Dialog = new tmp.CommonDialog(args, this.ui);
+                this.Dialog.onLoad(null);
+
+                // Display the tabprompt title that shows the prompt origin when
+                // the prompt origin is not the same as that of the top window.
+                if (!args.showAlertOrigin)
+                    this.ui.infoTitle.removeAttribute("hidden");
+
+                // TODO: should unhide buttonSpacer on Windows when there are 4 buttons.
+                //       Better yet, just drop support for 4-button dialogs. (bug 609510)
+
+                this.onResize();
+            ]]>
+            </body>
+        </method>
+
+        <method name="shutdownPrompt">
+            <body>
+            <![CDATA[
+                // remove our event listeners
+                try {
+                    window.removeEventListener("resize", this, false);
+                    window.removeEventListener("unload", this, false);
+                    this.linkedTab.removeEventListener("TabClose", this, false);
+                } catch (e) { }
+                this.isLive = false;
+                // invoke callback
+                this.onCloseCallback();
+            ]]>
+            </body>
+        </method>
+
+        <method name="abortPrompt">
+            <body>
+            <![CDATA[
+                // Called from other code when the page changes.
+                this.Dialog.abortPrompt();
+                this.shutdownPrompt();
+            ]]>
+            </body>
+        </method>
+
+        <method name="handleEvent">
+            <parameter name="aEvent"/>
+            <body>
+            <![CDATA[
+                switch (aEvent.type) {
+                  case "resize":
+                    this.onResize();
+                    break;
+                  case "unload":
+                  case "TabClose":
+                    this.abortPrompt();
+                    break;
+                }
+            ]]>
+            </body>
+        </method>
+
+        <method name="onResize">
+            <body>
+            <![CDATA[
+                let availWidth = this.clientWidth;
+                let availHeight = this.clientHeight;
+                if (availWidth == this.availWidth && availHeight == this.availHeight)
+                    return;
+                this.availWidth = availWidth;
+                this.availHeight = availHeight;
+
+                let self = this;
+                function getElement(anonid) {
+                    return document.getAnonymousElementByAttribute(self, "anonid", anonid);
+                }
+                let main = getElement("mainContainer");
+                let info = getElement("infoContainer");
+                let body = this.ui.infoBody;
+
+                // cap prompt dimensions at 60% width and 60% height of content area
+                if (!this.minWidth)
+                  this.minWidth = parseInt(window.getComputedStyle(main).minWidth);
+                if (!this.minHeight)
+                  this.minHeight = parseInt(window.getComputedStyle(main).minHeight);
+                let maxWidth = Math.max(Math.floor(availWidth * 0.6), this.minWidth) +
+                               info.clientWidth - main.clientWidth;
+                let maxHeight = Math.max(Math.floor(availHeight * 0.6), this.minHeight) +
+                                info.clientHeight - main.clientHeight;
+                body.style.maxWidth = maxWidth + "px";
+                info.style.overflow = info.style.width = info.style.height = "";
+
+                // when prompt text is too long, use scrollbars
+                if (info.clientWidth > maxWidth) {
+                    info.style.overflow = "auto";
+                    info.style.width = maxWidth + "px";
+                }
+                if (info.clientHeight > maxHeight) {
+                    info.style.overflow = "auto";
+                    info.style.height = maxHeight + "px";
+                }
+            ]]>
+            </body>
+        </method>
+
+        <method name="onButtonClick">
+            <parameter name="buttonNum"/>
+            <body>
+            <![CDATA[
+                // We want to do all the work her asynchronously off a Gecko
+                // runnable, because of situations like the one described in
+                // https://bugzilla.mozilla.org/show_bug.cgi?id=1167575#c35 : we
+                // get here off processing of an OS event and will also process
+                // one more Gecko runnable before we break out of the event loop
+                // spin whoever posted the prompt is doing.  If we do all our
+                // work sync, we will exit modal state _before_ processing that
+                // runnable, and if exiting moral state posts a runnable we will
+                // incorrectly process that runnable before leaving our event
+                // loop spin.
+                Services.tm.mainThread.dispatch(() => {
+                    this.Dialog["onButton" + buttonNum]();
+                    this.shutdownPrompt();
+                  },
+                  Ci.nsIThread.DISPATCH_NORMAL);
+            ]]>
+            </body>
+        </method>
+
+        <method name="onKeyAction">
+            <parameter name="action"/>
+            <parameter name="event"/>
+            <body>
+            <![CDATA[
+                if (event.defaultPrevented)
+                    return;
+
+                event.stopPropagation();
+                if (action == "default") {
+                    let bnum = this.args.defaultButtonNum || 0;
+                    this.onButtonClick(bnum);
+                } else { // action == "cancel"
+                    this.onButtonClick(1); // Cancel button
+                }
+            ]]>
+            </body>
+        </method>
+    </implementation>
+
+    <handlers>
+        <!-- Based on dialog.xml handlers -->
+        <handler event="keypress" keycode="VK_RETURN"
+                 group="system" action="this.onKeyAction('default', event);"/>
+        <handler event="keypress" keycode="VK_ESCAPE"
+                 group="system" action="this.onKeyAction('cancel', event);"/>
+#ifdef XP_MACOSX
+        <handler event="keypress" key="." modifiers="meta"
+                 group="system" action="this.onKeyAction('cancel', event);"/>
+#endif
+        <handler event="focus" phase="capturing">
+            let bnum = this.args.defaultButtonNum || 0;
+            let defaultButton = this.ui["button" + bnum];
+
+            let { AppConstants } =
+                Components.utils.import("resource://gre/modules/AppConstants.jsm", {});
+            if (AppConstants.platform == "macosx") {
+              // On OS X, the default button always stays marked as such (until
+              // the entire prompt blurs).
+              defaultButton.setAttribute("default", true);
+            } else {
+              // On other platforms, the default button is only marked as such
+              // when no other button has focus. XUL buttons on not-OSX will
+              // react to pressing enter as a command, so you can't trigger the
+              // default without tabbing to it or something that isn't a button.
+              let focusedDefault = (event.originalTarget == defaultButton);
+              let someButtonFocused = event.originalTarget instanceof Ci.nsIDOMXULButtonElement;
+              defaultButton.setAttribute("default", focusedDefault || !someButtonFocused);
+            }
+        </handler>
+        <handler event="blur">
+            // If focus shifted to somewhere else in the browser, don't make
+            // the default button look active.
+            let bnum = this.args.defaultButtonNum || 0;
+            let button = this.ui["button" + bnum];
+            button.setAttribute("default", false);
+        </handler>
+    </handlers>
+
+  </binding>
+</bindings>