зеркало из https://github.com/mozilla/pjs.git
118 строки
3.8 KiB
JavaScript
118 строки
3.8 KiB
JavaScript
# -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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#
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# ***** 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 this file as it was released upon January 6, 2001.
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#
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# The Initial Developer of the Original Code is
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# Peter Annema.
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# Portions created by the Initial Developer are Copyright (C) 2000
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# the Initial Developer. All Rights Reserved.
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#
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# Contributor(s):
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# Peter Annema <disttsc@bart.nl> (Original Author)
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# Jonas Sicking <sicking@bigfoot.com>
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# Jason Barnabe <jason_barnabe@fastmail.fm>
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# Dão Gottwald <dao@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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/** Document Zoom Management Code
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*
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* To use this, you'll need to have a getBrowser() function.
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**/
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var ZoomManager = {
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get _prefBranch() {
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return Components.classes["@mozilla.org/preferences-service;1"]
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.getService(Components.interfaces.nsIPrefBranch);
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},
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get MIN() {
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delete this.MIN;
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return this.MIN = this._prefBranch.getIntPref("fullZoom.minPercent") / 100;
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},
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get MAX() {
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delete this.MAX;
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return this.MAX = this._prefBranch.getIntPref("fullZoom.maxPercent") / 100;
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},
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get fullZoom() {
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return getBrowser().markupDocumentViewer.fullZoom;
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},
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set fullZoom(aVal) {
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if (aVal < this.MIN || aVal > this.MAX)
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throw Components.results.NS_ERROR_INVALID_ARG;
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return (getBrowser().markupDocumentViewer.fullZoom = aVal);
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},
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get fullZoomValues() {
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var fullZoomValues = this._prefBranch.getCharPref("toolkit.zoomManager.fullZoomValues")
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.split(",").map(parseFloat);
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fullZoomValues.sort();
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while (fullZoomValues[0] < this.MIN)
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fullZoomValues.shift();
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while (fullZoomValues[fullZoomValues.length - 1] > this.MAX)
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fullZoomValues.pop();
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delete this.fullZoomValues;
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return this.fullZoomValues = fullZoomValues;
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},
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enlarge: function () {
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var i = this.fullZoomValues.indexOf(this.snap(this.fullZoom)) + 1;
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if (i < this.fullZoomValues.length)
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this.fullZoom = this.fullZoomValues[i];
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},
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reduce: function () {
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var i = this.fullZoomValues.indexOf(this.snap(this.fullZoom)) - 1;
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if (i >= 0)
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this.fullZoom = this.fullZoomValues[i];
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},
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reset: function () {
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this.fullZoom = 1;
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},
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snap: function (aVal) {
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var values = this.fullZoomValues;
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for (var i = 0; i < values.length; i++) {
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if (values[i] >= aVal) {
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if (i > 0 && aVal - values[i - 1] < values[i] - aVal)
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i--;
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return values[i];
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}
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}
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return values[i - 1];
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}
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}
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