if (location.href == "chrome://browser/content/browser.xhtml") {
  Cu.import("resource://gre/modules/Services.jsm");

  window.ucjs_downloadManager = {
    _summary: null,
    _list: null,

    createElement: function(localName, arryAttribute) {
      let elm = document.createXULElement(localName);
      for(let i = 0; i < arryAttribute.length; i++) {
        elm.setAttribute(arryAttribute[i].attr, arryAttribute[i].value);
      }
      return elm;
    },

    init: function() {
      window.addEventListener("unload", this, false);

      let ref = document.getElementById("menu_openDownloads");
      let menu = ref.parentNode.insertBefore(
        this.createElement("menuitem",
          [{attr: "label", value:"Менеджер загрузок"},
           {attr : "oncommand", value: "ucjs_downloadManager.openDownloadManager(true);"}
          ]), ref);

      XPCOMUtils.defineLazyModuleGetter(this, "Downloads",
                "resource://gre/modules/Downloads.jsm");
      // Ensure that the DownloadSummary object will be created asynchronously.
      if (!this._summary) {
        this.Downloads.getSummary(this.Downloads.ALL).then(summary => {
          this._summary = summary;
          return this._summary.addView(this);
        }).then(null, Cu.reportError);
      }

      if (!this._list) {
        this.Downloads.getList(this.Downloads.ALL).then(list => {
          this._list = list;
          return this._list.addView(this);
        }).then(null, Cu.reportError);
      }
    },

    uninit: function() {
      window.removeEventListener("unload", this, false);

      if (this._summary) {
        this._summary.removeView(this);
      }
      if (this._list) {
        this._list.removeView(this);
      }
    },

    handleEvent: function(event) {
      switch (event.type) {
        case "unload":
          this.uninit();
          break;
      }
    },

    openDownloadManager: function ucjs_openDownloadManager(aForceFocus) {
      var enumerator = Services.wm.getEnumerator(null);
      while(enumerator.hasMoreElements()) {
        var win = enumerator.getNext();
        if (win.location == "chrome://browser/content/downloads/contentAreaDownloadsView.xul"
          && PrivateBrowsingUtils.isWindowPrivate(window) ==
             PrivateBrowsingUtils.isWindowPrivate(win)) {
          if (aForceFocus)
            win.focus();
          return;
        }
      }

      try {
        var height = Math.max(100,Services.prefs.getIntPref("browser.download.manager.size.height"));
        var width  = Math.max(300,Services.prefs.getIntPref("browser.download.manager.size.width"));
        var screenX = Math.min(Math.max(0,Services.prefs.getIntPref("browser.download.manager.size.screenX")), screen.availWidth - width);
        var screenY = Math.min(Math.max(0,Services.prefs.getIntPref("browser.download.manager.size.screenY")), screen.availHeight - height);
      } catch(r){
        height = 300;
        width  = 600;
        screenX = 0;
        screenY = 0;
      }
      var win = window.open("chrome://browser/content/downloads/contentAreaDownloadsView.xul",
                            "Download" +
                              (PrivateBrowsingUtils.isWindowPrivate(window) ? " - Private Window"
                                                                            : ""),
                            "outerWidth=" + width + ",outerHeight=" + height +
                            ",left=" + screenX + ",top=" + screenY +
                            ",chrome,toolbar=yes,dialog=no,resizable");
    },

    closeDownloadManager: function ucjs_closeDownloadManager() {
      var enumerator = Services.wm.getEnumerator(null);
      while(enumerator.hasMoreElements()) {
        var win = enumerator.getNext();
        if (win.location == "chrome://browser/content/downloads/contentAreaDownloadsView.xul") {
          win.close();
          return;
        }
      }
    },

    onDownloadAdded: function (aDownload) {
      var showWhenStarting = true;
      try {
        showWhenStarting = Services.prefs.getBoolPref("browser.download.manager.showWhenStarting");
      } catch(e) {}
      var numDls = 0;
      if (showWhenStarting) {
        if (this._list) {
          this._list.getAll().then(downloads => {
            for (let download of downloads) {
              if (!download.stopped)
                numDls++;
            }
            if (numDls > 0)
              this.openDownloadManager(false);
          }).then(null, Cu.reportError);
        }
      }
    },

    onDownloadChanged: function (aDownload) {
      if (!this._list)
        return;
      this._list.getAll().then(downloads => {
        var num = 0;
        for (let download of downloads) {
          if (!download.succeeded)
            num++;
        }
        if (num == 0) {
          var closeWhenDone = false;
          try {
            closeWhenDone = Services.prefs.getBoolPref("browser.download.manager.closeWhenDone");
          } catch(e) {}
          if (closeWhenDone) {
            this.closeDownloadManager();
          }
        }
      }).then(null, Cu.reportError);
    }
  };
  ucjs_downloadManager.init();
}


if (window.opener && location.href == "chrome://browser/content/downloads/contentAreaDownloadsView.xul") {
  
  Cu.import("resource://gre/modules/Services.jsm");
  Cu.import("resource://gre/modules/DownloadIntegration.jsm");

  window.ucjs_downloadManagerMain = {
    originalTitle:"",
    _summary: null,
    _list: null,
    _wait:false,

    createElement: function(localName, arryAttribute) {
      let elm = document.createXULElement(localName);
      for(let i = 0; i < arryAttribute.length; i++) {
        elm.setAttribute(arryAttribute[i].attr, arryAttribute[i].value);
      }
      return elm;
    },

    createElementNS: function(NS, localName, arryAttribute) {
      let elm = document.createElementNS(NS, localName);
      for(let i = 0; i < arryAttribute.length; i++) {
        elm.setAttribute(arryAttribute[i].attr, arryAttribute[i].value);
      }
      return elm;
    },

    init: function() {
      window.addEventListener("unload", this, false);

      // xxx remove in-content css
      var elements = document.childNodes;
      for (var i = 0; i <= elements.length; i++) {
        var element = elements[i];
        if (element.nodeValue.indexOf("chrome://browser/skin/downloads/contentAreaDownloadsView.css") > -1) {
          document.removeChild(element);
          break;
        }
      }
      /*
      var style = ' \
        @namespace url(http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul); \
        #contentAreaDownloadsView { \
          padding: 0 ; \
        } \
        #downloadsRichListBox:empty + #downloadsListEmptyDescription { \
          pointer-events: none; \
        } \
       '.replace(/\s+/g, " ");
      var sspi = document.createProcessingInstruction(
        'xml-stylesheet',
        'type="text/css" href="data:text/css,' + encodeURIComponent(style) + '"'
      );
      document.insertBefore(sspi, document.documentElement);
      sspi.getAttribute = function(name) {
        return document.documentElement.getAttribute(name);
      };
      */
      let ref = document.documentElement;
      ref = ref.appendChild(this.createElement("hbox", []));
      ref.appendChild(this.createElement("button",
        [{attr: "id", value: "ucjs_clearListButton"},
         {attr: "label", value: "Очистить загрузки"},
        ]));
      ref.appendChild(this.createElement("spacer",
        [{attr: "flex", value: "1"}]));
      ref.appendChild(this.createElementNS("http://www.w3.org/1999/xhtml", "input",
        [{attr: "id", value: "ucjs_downloadManagerMain_input"},
         {attr: "clickSelectsAll", value: "true"},
         {attr: "type", value: "search"},
         {attr: "placeholder", value: "Поиск..."},
         {attr: "aria-autocomplete", value: "list"}
        ]));

        document.getElementById("ucjs_clearListButton").addEventListener("command", function(event) {
            ucjs_downloadManagerMain.clearDownloads();
          });
        document.getElementById("ucjs_downloadManagerMain_input")
                .addEventListener("input", function(event) {
            ucjs_downloadManagerMain.doSearch(event.target.value);
          });

      this.originalTitle = document.title +
                           (PrivateBrowsingUtils.isWindowPrivate(window) ? " - Private Window"
                                                                         : "");

/*
      // xxx Bug 1279329 "Copy Download Link" of context menu in Library is grayed out
      var listBox = document.getElementById("downloadsRichListBox");
      var placesView = listBox._placesView;
      var place = placesView.place;
      placesView.place= null;
      placesView.place = place;
*/

      setTimeout(function(){this._wait = true}.bind(this), 0);

      // Ensure that the DownloadSummary object will be created asynchronously.
      if (!this._summary) {
        Downloads.getSummary(Downloads.ALL).then(summary => {
          this._summary = summary;
          return this._summary.addView(this);
        }).then(null, Cu.reportError);
      }

      if (!this._list) {
        Downloads.getList(Downloads.ALL).then(list => {
          this._list = list;
          return this._list.addView(this);
        }).then(null, Cu.reportError);
      }

      try {
        var showProgressInTaskButton = Services.prefs.getBoolPref("browser.download.manager.showProgressInTaskButton")
      } catch(ex) {
        showProgressInTaskButton = true; //default
      }
      if (showProgressInTaskButton)
        setTimeout(function() {
          try {
            let docShell = window.QueryInterface(Ci.nsIInterfaceRequestor)
                                  .getInterface(Ci.nsIWebNavigation)
                                  .QueryInterface(Ci.nsIDocShellTreeItem).treeOwner
                                  .QueryInterface(Ci.nsIInterfaceRequestor)
                                  .getInterface(Ci.nsIXULWindow).docShell;
            let gWinTaskbar = Components.classes["@mozilla.org/windows-taskbar;1"]
                                      .getService(Components.interfaces.nsIWinTaskbar);
            this._taskbarProgress = gWinTaskbar.getTaskbarProgress(docShell);
          } catch(ex) {
            this._taskbarProgress = null;
          }
        }.bind(this), 10);
    },

    uninit: function() {
      window.removeEventListener("unload", this, false);

      this._taskbarProgress = null;
      if (this._wait)
        this.saveSizePosition();

      if (this._summary) {
        this._summary.removeView(this);
      }
      if (this._list) {
        this._list.removeView(this);
      }
    },

    handleEvent: function(event) {
      switch (event.type) {
        case "unload":
          this.uninit();
          break;
      }
    },

    saveSizePosition: function() {
      if (window.windowState == 3) {
        Services.prefs.setIntPref("browser.download.manager.size.height", window.outerHeight);
        Services.prefs.setIntPref("browser.download.manager.size.width", window.outerWidth);
        Services.prefs.setIntPref("browser.download.manager.size.screenX", window.screenX);
        Services.prefs.setIntPref("browser.download.manager.size.screenY", window.screenY);
      }
    },

    onSummaryChanged: function () {
      if (!this._summary)
        return;
      if (this._summary.allHaveStopped || this._summary.progressTotalBytes == 0) {
        document.title = this.originalTitle;
        if (this._taskbarProgress) {
          this._taskbarProgress.setProgressState(
                                     Ci.nsITaskbarProgress.STATE_NO_PROGRESS, 0, 0);
        }
        Cu.import("resource://gre/modules/Services.jsm");
        var enumerator = Services.wm.getEnumerator("navigator:browser");
        while(enumerator.hasMoreElements()) {
          return;
        }

        var closeWhenDone = false;
        try {
          closeWhenDone = Services.prefs.getBoolPref("browser.download.manager.closeWhenDone");
        } catch(e) {}
        if (closeWhenDone) {
          DownloadIntegration._store.save();
          window.close();
        }

      } else {

        // If the last browser window has been closed, we have no indicator any more.
        if (this._taskbarProgress) {
          if (this._summary.allHaveStopped || this._summary.progressTotalBytes == 0) {
            this._taskbarProgress.setProgressState(
                                     Ci.nsITaskbarProgress.STATE_NO_PROGRESS, 0, 0);
          } else {
            // For a brief moment before completion, some download components may
            // report more transferred bytes than the total number of bytes.  Thus,
            // ensure that we never break the expectations of the progress indicator.
            let progressCurrentBytes = Math.min(this._summary.progressTotalBytes,
                                                this._summary.progressCurrentBytes);
            this._taskbarProgress.setProgressState(
                                     Ci.nsITaskbarProgress.STATE_NORMAL,
                                     progressCurrentBytes,
                                     this._summary.progressTotalBytes);
          }
        }

        // Update window title
        var numDls = 0;
        if (!this._list)
          return;
        this._list.getAll().then(downloads => {
          for (let download of downloads) {
            if (download.hasProgress && !download.succeeded)
              numDls++;
          }

          let progressCurrentBytes = Math.min(this._summary.progressTotalBytes,
                                            this._summary.progressCurrentBytes);
          let percent = Math.floor(progressCurrentBytes / this._summary.progressTotalBytes * 100);
          let text = percent + "% из " + numDls + (numDls < 2 ? " файла - " : " файлов - ") ;
          document.title = text + this.originalTitle;
        }).then(null, Cu.reportError);
      }
    },

    clearDownloads: function ucjs_clearDownloads() {
      var DO_NOT_DELETE_HISTORY = true; /* custmizable true or false */
      var richListBox = document.getElementById("downloadsRichListBox");

      var places = [];
      function addPlace(aURI, aTitle, aVisitDate) {
        places.push({
          uri: aURI,
          title: aTitle,
          visits: [{
            visitDate: (aVisitDate || Date.now()) * 1000,
            transitionType: Ci.nsINavHistoryService.TRANSITION_LINK
          }]
        });
      }
      function moveDownloads2History(d) {
        if (DO_NOT_DELETE_HISTORY &&
            !PrivateBrowsingUtils.isWindowPrivate(window)) {
          for (let element of richListBox.childNodes) {
            let download = element._shell.download;
            let aURI = makeURI(download.source.url);
            // let aTitle = document.getAnonymousElementByAttribute(element, "class", "downloadTarget").value
            let aTitle = download.target.path;
            aTitle = aTitle.match( /[^\\]+$/i )[0];
            aTitle = aTitle.match( /[^/]+$/i )[0];

            let aVisitDate = download.endTime || download.startTime;
            addPlace(aURI, aTitle, aVisitDate)
          }
        }

        // Clear List
        richListBox._placesView.doCommand('downloadsCmd_clearDownloads');

        if (DO_NOT_DELETE_HISTORY &&
            !PrivateBrowsingUtils.isWindowPrivate(window)) {
          if (places.length > 0) {
            var asyncHistory = Components.classes["@mozilla.org/browser/history;1"]
                     .getService(Components.interfaces.mozIAsyncHistory);
              asyncHistory.updatePlaces(places);
          }
        }
      }
      var btn = document.getElementById("ucjs_clearListButton");
      moveDownloads2History(0);
    },

    doSearch: function ucjs_doSearch(filterString) {
      var richListBox = document.getElementById("downloadsRichListBox");
      richListBox._placesView.searchTerm = filterString;
    }
  };
  ucjs_downloadManagerMain.init();
}

try {
            Services.scriptloader.loadSubScript("chrome://user_chrome_files/content/custom_scripts/ucjsDownloadsManager.uc.js", window, "UTF-8");
        } catch(e) {}

var observer = {
    observe: function(aSubject, aTopic, aData) {
        if (aTopic == "domwindowopened" && aSubject instanceof Ci.nsIDOMWindow) {
            aSubject.addEventListener("load", function domLoad() {
                aSubject.removeEventListener("load", domLoad, false);
                var loc = aSubject.location;
                if (loc && loc.href.startsWith("chrome://browser/content/downloads/contentAreaDownloadsView.x")) {
                    try {
                        Services.scriptloader.loadSubScript("chrome://user_chrome_files/content/custom_scripts/places_win.js", aSubject, "UTF-8");
                    } catch(e) {}
                }
            }, false);
        }
    }
};
Services.obs.addObserver(observer, "domwindowopened", false);

#privatebrowsing-button {
    list-style-image: url("chrome://browser/skin/privatebrowsing/favicon.svg") !important;
}

#privatebrowsing-button image {
    fill: currentColor !important;
}