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135 lines
4.5 KiB
JavaScript
135 lines
4.5 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 Mobile Browser.
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*
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* The Initial Developer of the Original Code is
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* Mozilla Foundation.
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* Portions created by the Initial Developer are Copyright (C) 2011
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Matt Brubeck <mbrubeck@mozilla.com>
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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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var TabletSidebar = {
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_grabbed: false, // true while the user is dragging the sidebar
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_offset: 0, // tracks how far the sidebar has been dragged
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_slideMultiplier: 1, // set greater than 1 to amplify sidebar drags (makes swiping easier)
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get visible() {
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return Elements.urlbarState.getAttribute("tablet_sidebar") == "true";
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},
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toggle: function toggle() {
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if (this.visible)
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this.hide();
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else
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this.show();
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},
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show: function show() {
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Elements.urlbarState.setAttribute("tablet_sidebar", "true");
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ViewableAreaObserver.update();
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},
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hide: function hide() {
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Elements.urlbarState.setAttribute("tablet_sidebar", "false");
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ViewableAreaObserver.update();
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},
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/**
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* If scrolling by aDx pixels should grab the sidebar, grab and return true.
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* Otherwise return false.
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*/
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tryGrab: function tryGrab(aDx) {
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if (aDx == 0)
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return false;
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let ltr = (Util.localeDir == Util.LOCALE_DIR_LTR);
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let willShow = ltr ? (aDx < 0) : (aDx > 0);
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if (willShow != this.visible) {
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this.grab();
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return true;
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}
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return false;
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},
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/**
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* Call this function in landscape tablet mode to begin dragging the tab sidebar.
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* Hiding the sidebar makes the viewable area grow; showing the sidebar makes it shrink.
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*/
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grab: function grab() {
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this._grabbed = true;
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// While sliding the sidebar, tell ViewableAreaObserver to size the browser
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// as if the sidebar weren't there. This avoids resizing the browser while dragging.
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ViewableAreaObserver.update({ setIgnoreTabletSidebar: true });
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let ltr = (Util.localeDir == Util.LOCALE_DIR_LTR);
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if (this.visible) {
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this._setOffset(ltr ? 0 : ViewableAreaObserver.sidebarWidth);
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this._slideMultiplier = 3;
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} else {
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// If the tab bar is hidden, un-collapse it but scroll it offscreen.
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this.show();
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this._setOffset(ltr ? ViewableAreaObserver.sidebarWidth : 0);
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this._slideMultiplier = 6;
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}
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},
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/** Move the tablet sidebar by aX pixels. */
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slideBy: function slideBy(aX) {
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this._setOffset(this._offset + (aX * this._slideMultiplier));
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},
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/** Call this when tablet sidebar dragging is finished. */
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ungrab: function ungrab() {
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if (!this._grabbed)
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return;
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this._grabbed = false;
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let finalOffset = this._offset;
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this._setOffset(0);
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let rtl = (Util.localeDir == Util.LOCALE_DIR_RTL);
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if (finalOffset > (ViewableAreaObserver.sidebarWidth / 2) ^ rtl)
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this.hide();
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else
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// we already called show() in grab; just need to update the width again.
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ViewableAreaObserver.update({ setIgnoreTabletSidebar: false });
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},
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/** Move the tablet sidebar. */
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_setOffset: function _setOffset(aOffset) {
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this._offset = aOffset;
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let scrollX = Util.clamp(aOffset, 0, ViewableAreaObserver.sidebarWidth);
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Browser.controlsScrollboxScroller.scrollTo(scrollX, 0);
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}
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}
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