зеркало из https://github.com/mozilla/pjs.git
119 строки
4.3 KiB
JavaScript
119 строки
4.3 KiB
JavaScript
/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is mozilla.org Code.
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*
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* The Initial Developer of the Original Code is
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* Markus Stange <mstange@themasta.com>.
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* Portions created by the Initial Developer are Copyright (C) 2008
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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let EXPORTED_SYMBOLS = [ "WindowDraggingElement" ];
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function WindowDraggingElement(elem, window) {
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this._elem = elem;
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this._window = window;
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#ifdef XP_WIN
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this._elem.addEventListener("MozMouseHittest", this, false);
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#else
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this._elem.addEventListener("mousedown", this, false);
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#endif
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}
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WindowDraggingElement.prototype = {
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mouseDownCheck: function(e) { return true; },
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dragTags: ["box", "hbox", "vbox", "spacer", "label", "statusbarpanel", "stack",
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"toolbaritem", "toolbarseparator", "toolbarspring", "toolbarspacer",
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"radiogroup", "deck", "scrollbox", "arrowscrollbox", "tabs"],
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shouldDrag: function(aEvent) {
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if (aEvent.button != 0 ||
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this._window.fullScreen ||
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!this.mouseDownCheck.call(this._elem, aEvent) ||
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aEvent.getPreventDefault())
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return false;
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let target = aEvent.originalTarget, parent = aEvent.originalTarget;
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// The target may be inside an embedded iframe or browser. (bug 615152)
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if (target.ownerDocument.defaultView != this._window)
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return false;
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while (parent != this._elem) {
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let mousethrough = parent.getAttribute("mousethrough");
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if (mousethrough == "always")
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target = parent.parentNode;
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else if (mousethrough == "never")
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break;
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parent = parent.parentNode;
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}
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while (target != this._elem) {
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if (this.dragTags.indexOf(target.localName) == -1)
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return false;
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target = target.parentNode;
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}
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return true;
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},
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handleEvent: function(aEvent) {
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#ifdef XP_WIN
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if (this.shouldDrag(aEvent))
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aEvent.preventDefault();
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#else
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switch (aEvent.type) {
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case "mousedown":
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if (!this.shouldDrag(aEvent))
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return;
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#ifdef MOZ_WIDGET_GTK2
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// On GTK, there is a toolkit-level function which handles
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// window dragging, which must be used.
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this._window.beginWindowMove(aEvent);
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#else
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this._deltaX = aEvent.screenX - this._window.screenX;
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this._deltaY = aEvent.screenY - this._window.screenY;
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this._draggingWindow = true;
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this._window.addEventListener("mousemove", this, false);
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this._window.addEventListener("mouseup", this, false);
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#endif
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break;
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case "mousemove":
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if (this._draggingWindow)
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this._window.moveTo(aEvent.screenX - this._deltaX, aEvent.screenY - this._deltaY);
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break;
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case "mouseup":
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if (this._draggingWindow) {
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this._draggingWindow = false;
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this._window.removeEventListener("mousemove", this, false);
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this._window.removeEventListener("mouseup", this, false);
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}
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break;
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}
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#endif
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}
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}
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