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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/.
* PMkit shim for 'sdk/ui/button', (c) JustOff, 2017 */
"use strict";
module.metadata = {
"stability": "experimental",
"engines": {
"Palemoon": "> 27"
}
};
const { Ci, Cc } = require('chrome');
const prefs = require('../preferences/service');
const buttonsList = new Map();
const LOCATION_PREF_ROOT = "extensions.sdk-button-location.";
let gWindowListener;
function getLocation(id) {
let toolbarId = "nav-bar", nextItemId = "";
let location = prefs.get(LOCATION_PREF_ROOT + id);
if (location && location.indexOf(",") !== -1) {
[toolbarId, nextItemId] = location.split(",");
}
return [toolbarId, nextItemId];
}
function saveLocation(id, toolbarId, nextItemId) {
let _toolbarId = toolbarId || "";
let _nextItemId = nextItemId || "";
prefs.set(LOCATION_PREF_ROOT + id, [_toolbarId, _nextItemId].join(","));
}
// Insert button into window
function insertButton(aWindow, id, onBuild) {
// Build button and save reference to it
let doc = aWindow.document;
let b = onBuild(doc, id);
aWindow[id] = b;
// Add to the customization palette
let toolbox = doc.getElementById("navigator-toolbox");
toolbox.palette.appendChild(b);
// Retrieve button location from preferences
let [toolbarId, nextItemId] = getLocation(id);
let toolbar = toolbarId != "" && doc.getElementById(toolbarId);
if (toolbar) {
let nextItem = doc.getElementById(nextItemId);
// If nextItem not in toolbar then retrieve it by reading currentset attribute
if (!(nextItem && nextItem.parentNode && nextItem.parentNode.id == toolbarId)) {
nextItem = null;
let currentSet = toolbar.getAttribute("currentset");
let ids = (currentSet == "__empty") ? [] : currentSet.split(",");
let idx = ids.indexOf(id);
if (idx != -1) {
for (let i = idx; i < ids.length; i++) {
nextItem = doc.getElementById(ids[i]);
if (nextItem)
break;
}
}
}
// Finally insert button in the right toolbar and in the right position
toolbar.insertItem(id, nextItem, null, false);
}
}
// Remove button from window
function removeButton(aWindow, id) {
let b = aWindow[id];
b.parentNode.removeChild(b);
delete aWindow[id];
}
// Save locations of buttons after customization
function afterCustomize(e) {
for (let [id] of buttonsList) {
let toolbox = e.target;
let b = toolbox.parentNode.querySelector("#" + id);
let toolbarId = null, nextItemId = null;
if (b) {
let parent = b.parentNode;
let nextItem = b.nextSibling;
if (parent && parent.localName == "toolbar") {
toolbarId = parent.id;
nextItemId = nextItem && nextItem.id;
}
}
saveLocation(id, toolbarId, nextItemId);
}
}
// Global window observer
function browserWindowObserver(handlers) {
this.handlers = handlers;
}
browserWindowObserver.prototype = {
observe: function(aSubject, aTopic, aData) {
if (aTopic == "domwindowopened") {
aSubject.QueryInterface(Ci.nsIDOMWindow).addEventListener("load", this, false);
} else if (aTopic == "domwindowclosed") {
if (aSubject.document.documentElement.getAttribute("windowtype") == "navigator:browser") {
this.handlers.onShutdown(aSubject);
}
}
},
handleEvent: function(aEvent) {
let aWindow = aEvent.currentTarget;
aWindow.removeEventListener(aEvent.type, this, false);
if (aWindow.document.documentElement.getAttribute("windowtype") == "navigator:browser") {
this.handlers.onStartup(aWindow);
}
}
};
// Run on every window startup
function browserWindowStartup(aWindow) {
for (let [id, onBuild] of buttonsList) {
insertButton(aWindow, id, onBuild);
}
aWindow.addEventListener("aftercustomization", afterCustomize, false);
};
// Run on every window shutdown
function browserWindowShutdown(aWindow) {
for (let [id, onBuild] of buttonsList) {
removeButton(aWindow, id);
}
aWindow.removeEventListener("aftercustomization", afterCustomize, false);
}
// Main object
const buttons = {
createButton: function(aProperties) {
// If no buttons were inserted yet, setup global window observer
if (buttonsList.size == 0) {
let ww = Cc["@mozilla.org/embedcomp/window-watcher;1"].getService(Ci.nsIWindowWatcher);
gWindowListener = new browserWindowObserver({
onStartup: browserWindowStartup,
onShutdown: browserWindowShutdown
});
ww.registerNotification(gWindowListener);
}
// Add button to list
buttonsList.set(aProperties.id, aProperties.onBuild);
// Inster button to all open windows
let wm = Cc["@mozilla.org/appshell/window-mediator;1"].getService(Ci.nsIWindowMediator);
let winenu = wm.getEnumerator("navigator:browser");
while (winenu.hasMoreElements()) {
let win = winenu.getNext();
insertButton(win, aProperties.id, aProperties.onBuild);
// When first button inserted, add afterCustomize listener
if (buttonsList.size == 1) {
win.addEventListener("aftercustomization", afterCustomize, false);
}
}
},
destroyButton: function(id) {
// Remove button from list
buttonsList.delete(id);
// If no more buttons exist, remove global window observer
if (buttonsList.size == 0) {
let ww = Cc["@mozilla.org/embedcomp/window-watcher;1"].getService(Ci.nsIWindowWatcher);
ww.unregisterNotification(gWindowListener);
gWindowListener = null;
}
// Remove button from all open windows
let wm = Cc["@mozilla.org/appshell/window-mediator;1"].getService(Ci.nsIWindowMediator);
let winenu = wm.getEnumerator("navigator:browser");
while (winenu.hasMoreElements()) {
let win = winenu.getNext();
removeButton(win, id);
// If no more buttons exist, remove afterCustomize listener
if (buttonsList.size == 0) {
win.removeEventListener("aftercustomization", afterCustomize, false);
}
}
},
getNode: function(id, window) {
return window[id];
}
};
exports.buttons = buttons;
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