// ==UserScript==
// @name           patchForBug487263_489729.uc.js
// @namespace      http://space.geocities.yahoo.co.jp/gl/alice0775
// @description    Workaround for Bug 487263 - dragging a tab up or over the tab bar then out of the window does not detach & Bug 489729 - Clicking a tab once and then moving your mouse in a downward motion causes a new window to open.
// @include        main
// @compatibility  Firefox 3.5, 3.6a1pre
// @author         Alice0775
// @version        2009/06/03 00:00 TMPуБиуБоф║ТцПЫ, Bug 493978хЖНшАГ
// ==/UserScript==
// @version        2009/05/19 19:00 For checking-in Bug 487263
// @version        2009/05/03 19:00 уВ│уГ│уГЖуГ│уВиуГкуВвхИдхоЪ
// @version        2009/05/02 19:00 уГЦуГйуВжуВ╢уБохдЦуБ╕уБоуВ┐уГЦхИЖщЫвуБи, уВ╗уГ│уВ╖уГУуГкуГЖуВгуБоцФ╣хЦД
var bug489729 = {
  handleEvent: function(event) {
    switch(event.type) {
      case 'load':
        this.init();
        break;
      case 'unload':
        this.uninit();
        break;
    }
  },

  init: function() {
    var func;
    //xxx Bug 489729 -  Clicking a tab once and then moving your
    //                  mouse in a downward motion causes a new window to open.
    // Timer which is used detaching tab.
    gBrowser.___onDragOverTimer = null;

    if ('TabDNDObserver' in window) { //tmp
      func = TabDNDObserver.onDragStart.toString();
      func = func.replace(
        'if (gIsFirefox35) {',
      <><![CDATA[
        if (gBrowser.___onDragOverTimer)
          clearTimeout(gBrowser.___onDragOverTimer);
        gBrowser.my_DragLeave = false;
        var xpref = Components.classes['@mozilla.org/preferences-service;1']
                    .getService(Components.interfaces.nsIPrefBranch2);
        try {
          var enable = xpref.getBoolPref("extensions.bug489729.enable_drop_url");
        } catch(e) {
          enable = false;
        }
        $&
        ]]></>
      )
      func = func.replace(
        /dt\.mozSetDataAt\("text\/x-moz-text-internal", spec, 0\);|dt\.mozSetDataAt\("text\/plain", spec, 0\);/g,
      <><![CDATA[
        if (enable) {
          dt.mozSetDataAt("text/x-moz-url", spec + "\n" + draggedTab.getAttribute('label'), 0);
          dt.mozSetDataAt("text/unicode", spec, 0);
          dt.mozSetDataAt("text/html", "<a href=\"" + spec + "\">" + spec + "</a>", 0);
        } else {
          dt.mozSetDataAt("text\/x-moz-text-internal", spec, 0);
        }
        ]]></>
      )
      eval("TabDNDObserver.onDragStart = " + func);

      TabDNDObserver.onDragEnd = function minit_onDragEnd(aEvent) {
        var xpref = Components.classes['@mozilla.org/preferences-service;1']
                    .getService(Components.interfaces.nsIPrefBranch2);
        try {
          var disabled = xpref.getBoolPref("extensions.bug489729.disable_detach_tab");
        } catch(e) {
          disabled = true;
        }
        if (disabled) {
            return;
        }

        // * mozUserCancelled = the user pressed ESC to cancel the drag
        var dt = aEvent.dataTransfer;
        if (gSingleWindowMode || dt.mozUserCancelled || dt.dropEffect != "none") {
            return;
        }

        // Disable detach within the browser toolbox
        var eX = aEvent.screenX;
        var wX = window.screenX;
        var eY = aEvent.screenY;
        var wY = window.screenY;
        var tabbar = gBrowser.mTabContainer.mTabstrip.boxObject;
        var contentArea = gBrowser.mPanelContainer.boxObject;

        // xxx Bug 493978 -  Disable tab-detach when the tab is dropped very close to the tabbar
        const TLERANCE = 15; //15px is enough.
        var side = {
                    "TOP"   :contentArea.screenY,
                    "BOTTOM":contentArea.screenY + contentArea.height,
                    "LEFT"  :contentArea.screenX,
                    "RIGHT" :contentArea.screenX + contentArea.width
                    }
        if (tabbar.screenY + tabbar.height <= contentArea.screenY)
          side["TOP"] += TLERANCE;
        else if (tabbar.screenY >= contentArea.screenY + contentArea.height)
          side["BOTTOM"] -= TLERANCE;
        else if (tabbar.screenX + tabbar.width <= contentArea.screenX)
          side["LEFT"] += TLERANCE;
        else
          side["RIGHT"] -= TLERANCE;

        // check if the drop point is not (within contentArea or outside the window)
        // eq. dropped too close to the tabbar or toolbox and statusbar(incl. findbar)
        if (!(gBrowser.my_DragLeave &&
              side["TOP"] < eY && eY < side["BOTTOM"] &&
              side["LEFT"] < eX && eX < side["RIGHT"] ||
            eY < wY || wY + window.outerHeight < eY ||
            eX < wX || wX + window.outerWidth < eX )) {
          return;
        }
        var draggedTab = dt.mozGetDataAt(TAB_DROP_TYPE, 0);
        if ('TreeStyleTabBrowser' in window)
          if (this.treeStyleTab.isDraggingAllTabs(draggedTab)) return;
        gBrowser.replaceTabWithWindow(draggedTab);
        this.clearDragmark(aEvent);
        aEvent.stopPropagation();
      }
    } else {

      //xxx Bug 489729 -  Clicking a tab once and then moving your
      //                  mouse in a downward motion causes a new window to open.
      // Detach of a tab is disabled immediately after dragstart.
      func = gBrowser._onDragStart.toString();
        func = func.replace(
          'var target = aEvent.target;',
          <><![CDATA[
          var target = aEvent.target;
          if (gBrowser.___onDragOverTimer)
            clearTimeout(gBrowser.___onDragOverTimer);
          this.my_DragLeave = false;
          ]]></>
        )

        func = func.replace(
          /dt\.mozSetDataAt\("text\/x-moz-text-internal", spec, 0\);|dt\.mozSetDataAt\("text\/plain", spec, 0\);/,
          <><![CDATA[
          var xpref = Components.classes['@mozilla.org/preferences-service;1']
                      .getService(Components.interfaces.nsIPrefBranch2);
          try {
            var enable = xpref.getBoolPref("extensions.bug489729.enable_drop_url");
          } catch(e) {
            enable = false;
          }
          if (enable) {
            dt.mozSetDataAt("text/x-moz-url", spec + "\n" + target.getAttribute('label'), 0);
            dt.mozSetDataAt("text/unicode", spec, 0);
            dt.mozSetDataAt("text/html", "<a href=\"" + spec + "\">" + spec + "</a>", 0);
          } else {
            dt.mozSetDataAt("text/x-moz-text-internal", spec, 0);
          }
          ]]></>
        )
        eval("gBrowser._onDragStart = " + func);

      //xxx Bug 487263 & xxx Bug489729
      gBrowser._onDragEnd = function _onDragEnd(aEvent) {
        var xpref = Components.classes['@mozilla.org/preferences-service;1']
                    .getService(Components.interfaces.nsIPrefBranch2);
        try {
          var disabled = xpref.getBoolPref("extensions.bug489729.disable_detach_tab");
        } catch(e) {
          disabled = true;
        }
        if (disabled) {
            return;
        }

        // * mozUserCancelled = the user pressed ESC to cancel the drag
        var dt = aEvent.dataTransfer;
        if (dt.mozUserCancelled || dt.dropEffect != "none") {
            return;
        }

        // Disable detach within the browser toolbox
        var eX = aEvent.screenX;
        var wX = window.screenX;
        var eY = aEvent.screenY;
        var wY = window.screenY;
        var tabbar = gBrowser.mTabContainer.mTabstrip.boxObject;
        var contentArea = gBrowser.mPanelContainer.boxObject;

        // xxx Bug 493978 -  Disable tab-detach when the tab is dropped very close to the tabbar
        const TLERANCE = 15; //15x is enough.
        var side = {
                    "TOP"   :contentArea.screenY,
                    "BOTTOM":contentArea.screenY + contentArea.height,
                    "LEFT"  :contentArea.screenX,
                    "RIGHT" :contentArea.screenX + contentArea.width
                    }
        if (tabbar.screenY + tabbar.height <= contentArea.screenY)
          side["TOP"] += TLERANCE;
        else if (tabbar.screenY >= contentArea.screenY + contentArea.height)
          side["BOTTOM"] -= TLERANCE;
        else if (tabbar.screenX + tabbar.width <= contentArea.screenX)
          side["LEFT"] += TLERANCE;
        else
          side["RIGHT"] -= TLERANCE;

        // check if the drop point is not (within contentArea or outside the window)
        // eq. dropped too close to the tabbar or toolbox and statusbar(incl. findbar)
        if (!(this.my_DragLeave &&
              side["TOP"] < eY && eY < side["BOTTOM"] &&
              side["LEFT"] < eX && eX < side["RIGHT"] ||
            eY < wY || wY + window.outerHeight < eY ||
            eX < wX || wX + window.outerWidth < eX )) {
          return;
        }
        var draggedTab = dt.mozGetDataAt(TAB_DROP_TYPE, 0);
        if ('TreeStyleTabBrowser' in window)
          if (this.treeStyleTab.isDraggingAllTabs(draggedTab)) return;
        this.replaceTabWithWindow(draggedTab);
        aEvent.stopPropagation();
      }
    }

    //xxx Bug 489729 -  Clicking a tab once and then moving your
    //                  mouse in a downward motion causes a new window to open.
    // After drug over is carried out in contents area,
    // detaching of a tab is made enable in 100msec again.
    gBrowser.___onDragOver = function(aEvent) {
      if (!this.my_DragLeave) {
        this.___onDragOverTimer = setTimeout(function(self){
          self.my_DragLeave = true;
        }, 100, gBrowser);
      }
    }

    gBrowser.mPanelContainer.addEventListener('dragover', gBrowser.___onDragOver, true);
    window.addEventListener('unload', this, false);
  },

  uninit: function() {
    gBrowser.mPanelContainer.removeEventListener('dragover', gBrowser.___onDragOver, true);
    window.removeEventListener('unload', this, false);
  },

  //Fx version
  getVer: function(){
    const Cc = Components.classes;
    const Ci = Components.interfaces;
    var info = Cc["@mozilla.org/xre/app-info;1"].getService(Ci.nsIXULAppInfo);
    var ver = parseInt(info.version.substr(0,3) * 10,10) / 10;
    return ver;
  }
}
//window.addEventListener('load', bug489729, false);
bug489729.init();