227 lines
7.5 KiB
JavaScript
227 lines
7.5 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 Google Safe Browsing.
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*
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* The Initial Developer of the Original Code is Google Inc.
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* Portions created by the Initial Developer are Copyright (C) 2006
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Fritz Schneider <fritz@google.com> (original author)
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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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// Some small helper classes to deal with Firefox version numbers. Version
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// numbers are of the form:
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//
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// major.minor.release.build[+]
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//
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// where the last three are all optional. Each component is an integer or a
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// *, where a * means "infinity." See:
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// http://www.mozilla.org/projects/firefox/extensions/update.html
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//
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// A MozVersionNumber encapsulates a number of the form given above and
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// provides the ability to compare it with other version strings. The
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// compareToString() method has the usual comparison return value (less than,
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// greater than, or 0 for equal to).
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//
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// ThisFirefoxVersion encapsulates the version of Firefox we're currently
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// running (and is-a MozVersionNumber).
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//
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// Examples:
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//
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// var ver = new G_ThisFirefoxVersion();
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// dump("Running Firefox v" + ver.getVersion());
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// if (ver.isVersionOf("1.5"))
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// do something 1.5-specific
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// if (ver.compareToString("1.5") < 0)
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// do something for all versions before 1.5
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// if (ver.compareToString("1.0") >= 0)
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// do something for all versions of 1.0 and later
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/**
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* Encapsulates a Mozilla-style version number. These numbers are used to
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* version Firefox, Thunderbird, and extensions. They have four optional
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* numbers separated by dots.
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*
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* @param version String holding the version number to initialize with
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*
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* @constructor
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*/
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function G_MozVersionNumber(version) {
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this.debugZone = "mozversion";
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this.version_ = version;
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this.components_ = this.version_.split(".");
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this.comparator_ = Cc["@mozilla.org/xpcom/version-comparator;1"]
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.getService(Ci.nsIVersionComparator);
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}
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/**
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* @param v String holding a version number against which to compare
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*
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* @returns Integer indicating how v compares. This value will be less
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* than zero if v is a later version, equal to zero if the
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* versions are equal, or greater than zero if v is an earlier
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* version.
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*/
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G_MozVersionNumber.prototype.compareToString = function(v) {
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return this.comparator_.compare(this.version_, v);
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}
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/**
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* Check to see if we are a "sub-version" of a particular string. By
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* "sub-version" we mean whether our version numbers match a string's
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* up to the number of components the string has. For example,
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* 1.5.3 is a version of 1 as well as 1.5 and 1.5.3, but not of
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* 1.5.3.2.
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*
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* @param v String holding a version number against which to check
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*
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* @returns Boolean indicating whether we are a sub-version of the
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* argument.
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*/
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G_MozVersionNumber.prototype.isVersionOf = function(v) {
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// It's not clear what isVersionOf means for + versions, so we
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// assume it means equality.
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if (this.version_.indexOf("+") != -1 || v.indexOf("+") != -1)
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return this.compareToString(v) == 0;
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// Handle the exact case, e.g., 1.0 vs 1.0.0.0
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if (this.compareToString(v) == 0)
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return true;
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var vComponents = v.split(".");
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// Handle the case where v is more specific
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if (vComponents.length > this.components_)
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return false;
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// Handle normal case; look for a prefix match
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for (var i = 0; i < vComponents.length; i++)
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if (vComponents[i] != this.components_[i])
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return false;
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return true;
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}
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/**
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* @returns String giving our version
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*/
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G_MozVersionNumber.prototype.getVersion = function() {
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return this.version_;
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}
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/**
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* Encapsulates the currently running Firefox's version number. This is
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* a subclass of MozVersionNumber.
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*
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* @constructor
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*/
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function G_ThisFirefoxVersion() {
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// Figure out what version we are so we can initialize the superclass
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var version;
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try {
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// This services was introduced in 1.5, so try it and then fall back
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// to the old-school way if it fails.
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var appInfo = Cc["@mozilla.org/xre/app-info;1"]
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.getService(Ci.nsIXULAppInfo);
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version = appInfo.version;
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} catch(e) {
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G_Debug(this, "Getting nsIXULAppInfo threw; trying app.version pref");
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version = (new G_Preferences()).getPref("app.version");
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}
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if (!version)
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throw new Error("Couldn't get application version!");
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G_MozVersionNumber.call(this, version);
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this.debugZone = "firefoxversion";
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}
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G_ThisFirefoxVersion.inherits(G_MozVersionNumber);
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/**
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* Cheesey unittests
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*/
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function TEST_G_MozVersionNumber() {
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if (G_GDEBUG) {
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var z = "mozversion UNITTEST";
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G_debugService.enableZone(z);
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G_Debug(z, "Starting");
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var v = G_MozVersionNumber;
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G_Assert(z, (new v("1.0")).compareToString("1.0") == 0,
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"exact equality broken");
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G_Assert(z, (new v("1.0.0.0")).compareToString("1.0") == 0,
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"mutlidot equality broken");
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G_Assert(z, (new v("1.0.2.1")).compareToString("1.1") < 0,
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"less than broken");
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G_Assert(z, (new v("1.1")).compareToString("1.0.2.1") > 0,
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"greater than broken");
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G_Assert(z, (new v("1.0+")).compareToString("1.1pre") == 0,
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"+ broken");
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G_Assert(z, (new v("1.5")).isVersionOf("1.5"), "exact versionof broken");
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G_Assert(z, (new v("1.5.*")).isVersionOf("1.5"), "star versionof broken");
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G_Assert(z, (new v("1.5.1.3")).isVersionOf("1.5"),
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"long versionof broken");
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G_Assert(z, (new v("1.1pre0")).isVersionOf("1.0+"), "+'s broken");
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G_Assert(z, !((new v("1.0pre0")).isVersionOf("1.1+")), "+'s broken");
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G_Assert(z, !(new v("1.5")).isVersionOf("1.6"), "not versionof broken");
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G_Assert(z, !(new v("1.5")).isVersionOf("1.5.*"),
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"not versionof star broken");
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G_Debug(z, "PASSED");
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}
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}
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function TEST_G_ThisFirefoxVersion() {
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if (G_GDEBUG) {
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var z = "firefoxversion UNITTEST";
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G_debugService.enableZone(z);
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G_Debug(z, "Starting");
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// Just check that it doesn't throw and that it is consistent
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var v = new G_ThisFirefoxVersion();
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G_Assert(z, v.isVersionOf(v.version_), "Firefox version broken");
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G_Debug(z, "PASSED");
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}
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}
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