зеркало из https://github.com/mozilla/pjs.git
157 строки
4.9 KiB
JavaScript
157 строки
4.9 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 or use the methods
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* that accept a browser to be modified.
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**/
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var ZoomManager = {
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get _prefBranch() {
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delete this._prefBranch;
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return this._prefBranch = 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("zoom.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("zoom.maxPercent") / 100;
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},
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get useFullZoom() {
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return this._prefBranch.getBoolPref("browser.zoom.full");
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},
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set useFullZoom(aVal) {
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this._prefBranch.setBoolPref("browser.zoom.full", aVal);
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return aVal;
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},
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get zoom() {
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return this.getZoomForBrowser(getBrowser());
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},
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getZoomForBrowser: function ZoomManager_getZoomForBrowser(aBrowser) {
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var markupDocumentViewer = aBrowser.markupDocumentViewer;
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return this.useFullZoom ||
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aBrowser.contentDocument.mozSyntheticDocument ?
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markupDocumentViewer.fullZoom : markupDocumentViewer.textZoom;
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},
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set zoom(aVal) {
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this.setZoomForBrowser(getBrowser(), aVal);
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return aVal;
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},
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setZoomForBrowser: function ZoomManager_setZoomForBrowser(aBrowser, 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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var markupDocumentViewer = aBrowser.markupDocumentViewer;
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if (this.useFullZoom || aBrowser.contentDocument.mozSyntheticDocument) {
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markupDocumentViewer.textZoom = 1;
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markupDocumentViewer.fullZoom = aVal;
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} else {
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markupDocumentViewer.textZoom = aVal;
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markupDocumentViewer.fullZoom = 1;
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}
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},
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get zoomValues() {
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var zoomValues = this._prefBranch.getCharPref("toolkit.zoomManager.zoomValues")
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.split(",").map(parseFloat);
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zoomValues.sort(function (a, b) a - b);
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while (zoomValues[0] < this.MIN)
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zoomValues.shift();
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while (zoomValues[zoomValues.length - 1] > this.MAX)
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zoomValues.pop();
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delete this.zoomValues;
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return this.zoomValues = zoomValues;
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},
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enlarge: function ZoomManager_enlarge() {
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var i = this.zoomValues.indexOf(this.snap(this.zoom)) + 1;
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if (i < this.zoomValues.length)
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this.zoom = this.zoomValues[i];
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},
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reduce: function ZoomManager_reduce() {
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var i = this.zoomValues.indexOf(this.snap(this.zoom)) - 1;
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if (i >= 0)
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this.zoom = this.zoomValues[i];
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},
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reset: function ZoomManager_reset() {
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this.zoom = 1;
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},
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toggleZoom: function ZoomManager_toggleZoom() {
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var zoomLevel = this.zoom;
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this.useFullZoom = !this.useFullZoom;
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this.zoom = zoomLevel;
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},
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snap: function ZoomManager_snap(aVal) {
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var values = this.zoomValues;
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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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