Gecko est un moteur open source de rendu web supportant différents standards d'internet comme le HTML, le CSS, le DOM, XML, javascript et d'autres standards encore.
Gecko est utilisé par de nombreux navigateurs internet, avec bien entendu Mozilla Firefox, mais aussi SeaMonkey, Camino. Gecko est en développement constant par les développeurs de Mozilla. Gecko est le nom final du moteur, il s'appelait aussi "Raptor" et "NGLayout"; mais le nom final du moteur a été choisi suite à un litige.
Pour plus d'informations, visitez l'article Gecko (moteur de rendu) sur Wikipedia.
Un moteur de rendu va aller traduire le contenu des fichiers (les fichiers pouvant être une page internet en HTML, XML, des images...) et s'occupe de formater les informations contenus dans les fichiers, généralement le HTML, qui décrivent l'emplacement des textes, des images etc... afin de faire affiché l'information comme le voulait le webmaster. Il dessine la page web dans la zone de rendu de la fenêtre du navigateur.
Ainsi officiellement, un moteur de rendu définie la politique de placement pour un docuement et fait la mise en page. Gecko est un moteur de rendu trés rapide. Il offre la possibilité de parser de nombreux types de docuements (HTML, XML, SVG, etc...). Il est capable de donné un rendu avancé en incluant les compositions et les transformations. Il supporte aussi le javascript et les plugins.
Gecko est si rapide et puissant qu'il peut être utiliser pour créer des interfaces utilisateurs pour certaines applications ("chrome"). En d'autres termes, Gecko ne fait pas seulement que affiché le contenu d'un document, il peut aussi être utiliser pour dessiner des barres de défilement, des menus à l'écran. Pour plus d'information, reportez-vous à la documentation sur XUL.
Gecko fournit la base nécessaire pour afficher l'information à l'écran, en incluant un moteur de rendu ainsi qu'un ensemble complémentaire de composants du navigateur. Cependant, Gecko ne supporte pas tous les composants aux côtés d'autres modules d'interface dans une application cohérente (y compris les menus, les barres d'outils, etc...) tel que Firefox.
La fondation Mozilla assemble les composants nécessaires dans ses logiciels, comme Firefox, Thunderbird, SeaMonkey, Camino, qui sont disponibles au téléchargement sur le site mozilla.org. Netscape a publié sa propre version du navigateur sous la marque Netscape Navigator. D'autres compagnies crée aussi leur propre logiciel et matériel qui utilisent Gecko. Voir la page recensant une liste de logiciel dans lequel Gecko est utilisé via XULRunner.
Les éditeurs tiers comme les éditeurs de logiciels et fournisseurs de matériels vont choisir les composants qu'ils souhaitent utiliser dans leurs logiciels ou matériels. Certains composants du navigateur ne sont pas fournis dans les fonctionnalités de Gecko, comme les marque page, l'historique de navigation, les faboris.... Cependant, la source de tous ces composants sont disponibles au téléchargement sur le portail mozilla.org.
The original Mozilla browser, first released as Navigator 1.0, was developed rapidly by a small team that was passionate about creating the next killer app, and they succeeded. Now that the web has evolved, a new generation layout engine was needed upon which future products could be built. Gecko enables a pioneering new class of dynamic content that is more interactive and offers greater presentation control to Web developers, using open and recommended Internet standards instead of proprietary APIs. You are encouraged to join this team by getting involved.
mozilla.org will assemble the Gecko layout engine and other browser components into the Mozilla browser application.
Gecko lies at the heart of Mozilla and Firefox browsers, as well as others, powering all of the individual components. Gecko technologies will also power the display of the mozilla.com portal site, speedily delivering more exciting content and services. Gecko's architecture will serve Mozilla well into the future, enabling faster time to market, more innovation, less costly development, easier distribution and updating, and better cross platform support.
Because Gecko is small, lightweight, and open source, other companies and organizations can easily reuse it. Many hardware vendors are creating devices with network access and wish to include web browsing functionality. Likewise, many software developers want to include Web browsing capability in their applications, but don't want to independently develop browser software. These developers can pick and choose the browser components they want from among those that Gecko offers, and package these components alongside their own within their finished products.
By the end of calendar year 2000, Gecko is expected to support the following recommended open Internet standards fully except for the areas noted below and open bugs documented in Bugzilla:
Of course not. As Robert O'Callahan notes in {{ Bug(25707) }}, "Full HTML4/CSS1 compliance can't mean '100% bug free'. If it does, no-one will ever ship a fully compliant browser."
Because web pages can be arbitrarily long and complex and have arbitrarily deeply nested markup, it will always be possible to construct web pages that do not display in a given browser the way the specifications would recommend. So long as QA testing and test case development continues, there will always be known bugs at any given point in time in the open-source Gecko codebase, and it follows that every commercial product that has ever shipped and ever will ship based on Gecko will have known bugs at the time of its release. (The same principle of course applies to other browser engine development projects and products based upon them as well.)
Known bugs in the open-source Gecko codebase are documented in Bugzilla. Here are some links to lists of reported bugs related to the standards mentioned above; be aware that these raw lists of open in-process bugs will inevitably include some duplicate, out of date, unreproducible, invalid, and incorrectly tagged reports:
For information about the known bugs of a specific commercial product based on Gecko, see that product's release notes.
Gecko supports the use of CSS and XSLT to format XML documents.
For XML documents without associated CSS or XSLT, Gecko displays the pretty-printed source of the document.
Content developers are sick and tired of developing and testing every single web page multiple times in order to support the different, incompatible, proprietary DOMs of browsers from different vendors. They have been demanding that all vendors fully support the open standards listed above so that they can
Gecko's robust support for these standards makes Gecko the platform of choice for web content and web application developers worldwide.
Gecko is reusable on all platforms thanks to XPCOM, a subset of COM that works across platforms. COM, developed by Digital and later adopted by Microsoft, is the de facto standard for modular interfaces on Windows platforms.
Additionally, on the Windows platform, Gecko's XPCOM interfaces are wrapped in an ActiveX control that VB developers can utilize (ActiveX wrappers are not available on other platforms because ActiveX is a Windows-only technology).
A JavaBean wrapper is not currently under development, but there is nothing in Gecko's architecture that precludes such development in the future. Source code and documentation for these interfaces are available through mozilla.org.
For future embedding API plans, see {{ interwiki('wikimo', 'Mozilla_2:Embedding_APIs', 'wikimo:Mozilla 2:Embedding APIs') }}.
Gecko's XPCOM interfaces are different than Microsoft's. The most important differences between the two models involve reflection of the Document Object Model (DOM) in the interfaces.
Microsoft's Trident interfaces reflect the DOM in a proprietary API, whereas Gecko exposes the DOM according to the W3C's recommended standard. Other incompatibilities exist. Adam Lock created a partial compatibility layer that may enable developers to more easily migrate from Microsoft's engine to the Gecko engine.
Gecko runs today on Win32 (Windows XP Service Pack 2, Windows Vista, Windows 7, Windows 8, Windows 8.1), Mac OS X 10.5 and later, and Linux. OEMs and contributors from the Net participating in mozilla.org are porting Gecko to other platforms. Such porting efforts are underway for Solaris, HP/UX, AIX, Irix, OS/2, OpenVMS, BeOS, and Amiga, among others.
Older versions of Gecko supported earlier versions of Win32 and Mac OS X.
Gecko includes the following components:
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