The Tor Browser: toolkit/modules/WindowDraggingUtils.jsm@6474c204b198

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

     1 /* This Source Code Form is subject to the terms of the Mozilla Public

     2  * License, v. 2.0. If a copy of the MPL was not distributed with this

     3  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

     5 #ifdef XP_WIN

     6 #define USE_HITTEST

     7 #elifdef MOZ_WIDGET_COCOA

     8 #define USE_HITTEST

     9 #endif

    11 this.EXPORTED_SYMBOLS = [ "WindowDraggingElement" ];

    13 this.WindowDraggingElement = function WindowDraggingElement(elem) {

    14   this._elem = elem;

    15   this._window = elem.ownerDocument.defaultView;

    16 #ifdef USE_HITTEST

    17   if (!this.isPanel())

    18     this._elem.addEventListener("MozMouseHittest", this, false);

    19   else

    20 #endif

    21   this._elem.addEventListener("mousedown", this, false);

    22 };

    24 WindowDraggingElement.prototype = {

    25   mouseDownCheck: function(e) { return true; },

    26   dragTags: ["box", "hbox", "vbox", "spacer", "label", "statusbarpanel", "stack",

    27              "toolbaritem", "toolbarseparator", "toolbarspring", "toolbarspacer",

    28              "radiogroup", "deck", "scrollbox", "arrowscrollbox", "tabs"],

    29   shouldDrag: function(aEvent) {

    30     if (aEvent.button != 0 ||

    31         this._window.fullScreen ||

    32         !this.mouseDownCheck.call(this._elem, aEvent) ||

    33         aEvent.defaultPrevented)

    34       return false;

    36     let target = aEvent.originalTarget, parent = aEvent.originalTarget;

    38     // The target may be inside an embedded iframe or browser. (bug 615152)

    39     if (target.ownerDocument.defaultView != this._window)

    40       return false;

    42     while (parent != this._elem) {

    43       let mousethrough = parent.getAttribute("mousethrough");

    44       if (mousethrough == "always")

    45         target = parent.parentNode;

    46       else if (mousethrough == "never")

    47         break;

    48       parent = parent.parentNode;

    49     }

    50     while (target != this._elem) {

    51       if (this.dragTags.indexOf(target.localName) == -1)

    52         return false;

    53       target = target.parentNode;

    54     }

    55     return true;

    56   },

    57   isPanel : function() {

    58     return this._elem instanceof Components.interfaces.nsIDOMXULElement &&

    59            this._elem.localName == "panel";

    60   },

    61   handleEvent: function(aEvent) {

    62     let isPanel = this.isPanel();

    63 #ifdef USE_HITTEST

    64     if (!isPanel) {

    65       if (this.shouldDrag(aEvent))

    66         aEvent.preventDefault();

    67       return;

    68     }

    69 #endif

    71     switch (aEvent.type) {

    72       case "mousedown":

    73         if (!this.shouldDrag(aEvent))

    74           return;

    76 #ifdef MOZ_WIDGET_GTK

    77         // On GTK, there is a toolkit-level function which handles

    78         // window dragging, which must be used.

    79         this._window.beginWindowMove(aEvent, isPanel ? this._elem : null);

    80 #else

    81         if (isPanel) {

    82           let screenRect = this._elem.getOuterScreenRect();

    83           this._deltaX = aEvent.screenX - screenRect.left;

    84           this._deltaY = aEvent.screenY - screenRect.top;

    85         }

    86         else {

    87           this._deltaX = aEvent.screenX - this._window.screenX;

    88           this._deltaY = aEvent.screenY - this._window.screenY;

    89         }

    90         this._draggingWindow = true;

    91         this._window.addEventListener("mousemove", this, false);

    92         this._window.addEventListener("mouseup", this, false);

    93 #endif

    94         break;

    95       case "mousemove":

    96         if (this._draggingWindow) {

    97           let toDrag = this.isPanel() ? this._elem : this._window;

    98           toDrag.moveTo(aEvent.screenX - this._deltaX, aEvent.screenY - this._deltaY);

    99         }

   100         break;

   101       case "mouseup":

   102         if (this._draggingWindow) {

   103           this._draggingWindow = false;

   104           this._window.removeEventListener("mousemove", this, false);

   105           this._window.removeEventListener("mouseup", this, false);

   106         }

   107         break;

   108     }

   109   }

   110 }

The Tor Browser / file revision