Web Browsers And Packages

Release: 2010-07-13
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Opera and other Presto based Browsers

 Presto 2.6, used in Opera 10.6, is a Crystal Level web platform using the Core 2 layout engine and the new Vega graphics engine and Carakan scripting virtual machine. Opera is available for many environments. This cutting-edge, web-standards supporting browser has support for:

• HTML 4.01 (HyperText Markup Language);
• HTML 5 'Subset';
• label attribute for option elements;
• HTML 5's <meta charset="">;
• ' named character reference;
• HTML 5 Forms except for progress, meter, input types search, tel and color;
• contenteditable and spell checking support (but not spellcheck attribute);
• canvas Element;
• HTML 5's audio, video and source elements (Presto 2.5);
• Partial HTML 5 Offline Web Applications support (AppCache, manifest attribute, manifest format, navigator.onLine property);
• WAI-ARIA adds support for Accessible Rich Internet Applications;
• Cascade StyleSheets (CSS) level 1, Visual & Interactive and Paged level 2.1 provides a realistic way of adding presentation and layout to your document structures;
• Some main and custom CSS 3 features;
• The ability to style and script with unknown markup;
• For image support we have GIF89a, JPEG, PNG, Icons (.ico, .png, .jpg, .gif), BMP (Windows Bitmap), XBM (X Bitmap), WBMP (Wireless Bitmap) and SVG;
• Document Object Model (DOM) level 1 (HTML, XML), 99% of level 2 (Core, HTML, XML, Views, Stylesheets, CSS, CSS2, Events, UIEvents, MutationEvents, MouseEvents, HTMLEvents, Traversal, Range), some Level 3 (bits of Core, LS (Load & Save), LS-Async (Asynchronised Load & Save) and XPath as well as partial XML and Events), Bits of DOM 5 HTML exposes the document to scripting interaction;
• JavaScript 1.6 (without multiple catches);
• Selectors API level 1 allows an easier way to access parts of the DOM using CSS-like selectors;
• GeoLocation support (2.6);
• Element Traversal API and the children property (2.1.1);
• In Presto 2.5, to compliment cookies, the Web SQL Database Storage allows local database performance and capacity with SQLite, and its support for SQL, to store information beyond the abilities of cookies;
• Also in Presto 2.5, the Web Storage's sessionStorage and localStorage allow local database performance and capacity with SQLite for name/value pairs.

Canvas feature support includes:

• Stroke and fill colours;
• Rectangles;
• Paths;
• rgba/hsla colours;
• Canvas Text (Presto 2.5);
• Shadows (Presto 2.5);
• Linear and radial gradients;
• Patterns;
• Translations, rotation and scale;
• Bring in pixel images;

CSS level 3 features supported includes:

• hsl(), rgba(), hsla();
• Namespace and Speech Modules;
• opacity and box-sizing for layout model switcher;
• Most of CSS3 Media Queries and its own -o- linking properties for XML;
• text-shadow;
• ::selection pseudo-element selector, Structural pseudo-class selectors (like :nth-child, :not, :empty, :first-of-type, etc), :enabled, :disabled and :checked UI state pseudo-class selectors and the :target selector;
• From Presto 2.2: @font-face At Rule with multiple src values, local() and format() functions (support for TrueType and OpenType fonts as well as SVG Fonts);
• Since Presto 2.5, support for Multiple Background Images, proper border-radius, proper box-shadow, CSS Transitions, CSS 2D Transforms;

Native Media format support:

• WebM (VP8 video and OGG Vorbis audio);
• OGG Theora Video;
• OGG Vorbis Audio;

SVG support includes:

• Groups, Titles, Descriptions, metadata, defs and use;
• Stroke and fill colours;
• Basic shapes (Rectangles, Rounded Corner Rectangles, Lines, Circles, Ellipses, Polylines and Polygons);
• Paths;
• Opacity;
• Text (since Presto 2 Second Edition (SE));
• Text on a path (since Presto 2 SE);
• SVG 1.2 text (textArea, tbreak, etc) (since Presto 2 SE);
• Hyperlinkg;
• Clipping, Masks, Markers, Patterns (since Presto 2 SE);
• Linear and radial gradients (rendered since Presto 2 SE);
• Translations, skews, rotation and scale;
• Bring in pixel images (rendered since Presto 2 SE);
• Conditional switch;
• SVG declarative animation;
• SVG Fonts;
• SVG (at least 1.1) Filters (since Prest 2 SE);
• CSS support (CSS properties were not supported on SVG text before Presto 2.5);
• SVG Views;
• Scripting support (since Presto 2 SE);
• Scripted animation (since Presto 2 SE);
• SVG integrates with webpage (true transparent background);
• SVG 1.2 Tiny audio and video elements (Presto 2.5);

In the realm of XML:

• eXtensible Markup Language (XML) 1.0 and 1.1 with Namespaces & XML-Stylesheet Processing Instruction (PI);
• xml:id Attribute;
• eXtensible HyperText Markup Language (XHTML) 1.0, 1.1 (without Ruby Annotation) and Basic 1.0;
• Wireless Markup Language (WML) 1.0 to 2.0 & XHTML Mobile Profile provides document structure primarily for the mobile and PDA market;
• CSS for Mathematical Markup Language (MathML) 2 to present math and sciences expressions on the web;
• Scalable Vector Graphics (SVG) 1.1 and partial 1.2 Tiny for ultimate 2-dimensional vector image display on desktop and mobile;
• eXtensible Stylesheet Language Transformations (XSLT) 1 & eXtensible Path Language (XPath) 1 allows the ability to convert document structure into other document structures;
• RSS and Atom news feed support;
• XML Events for current and future script event handling;
• XHTML+Voice 1.2 (includes VoiceXML 2.0) for Text-To-Speech and Speech Recognition handling;
• Limited XML Document Type Definition support only to process Entities in the Subset;

providing an excellent platform for experiencing the World Wide Web.

Opera passes the Acid 2 Test which tests Cascade Stylesheet (CSS) support. More about the Acid 2 Test from the Web Standards Project (WASP).

Opera 10.5 also clocks 100 out of 100, passing all tests and one test took 15 to 30 attempts, on the Acid 3 Test which tests DOM, scripting, HTML, SVG and various other technologies for Web 2.0. More about the Acid 3 Test from the Web Standards Project (WASP).

In order to allow users to navigate and use interactive webpage features using the keyboard (part of making webpages accessible) Opera provide the following: You can tab through form controls in general, audio and video. On MS Windows and Linux/Unix platforms use control+down arrow to highlight each link at a time or control+up arrow to highlight the previous link. On Apple Mac OS X use command+down arrow to highlight each link at a time or command+up arrow to highlight the previous link.

To download Opera you can go to its official website.

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