Web specifications support in Opera Presto 2.8

Last update

May 26, 2011

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Overview

Web specifications added since Opera Presto 2.7

• core-integration-points 90 through 102
• core-integration-points 103 through 115
• core-integration-points 116 through 119
• core-integration-points 120 through 130
• core-integration-points 131 through 141
• core-integration-points 142 through 149
• core-integration-points 150 through 158
• core-integration-points 159 through 162

Opera Presto web specification support pages

Overview

Opera Presto rendering engine

This document and its associated support tables apply specifically to the Opera Presto 2.8 rendering engine. It incorporates Opera Presto web specification support with the latest Core Milestone and integration point. Changes and additions occurring since Opera Presto 2.7 are identified with their specific Core Milestone integration points. Please see the following Core Milestone integration points added since Opera Presto 2.7 topic.

Opera desktop, device, and mobile products

Opera products use and depend upon various parts of the Opera Presto rendering engine and its web specification features. It is important to note that while the latest Opera Presto rendering engine has incorporated new web specification features, they may not have been added to the latest released versions of Opera products.

The Opera user agent string

Opera products will identify which Opera Presto version and core-integration-point they are using in their user agent string. Depending on your Opera product, the Opera user agent string is placed in the "About Opera" page, found by typing opera:about in the address bar, or by clicking "Help > About Opera" in the Menu.

Here is an example:

Opera/9.80 (Windows NT 5.1; U; en) Presto/2.8.131 Version/11.10

This example user agent string belongs to Opera 11.10 final release for desktop. It describes that it is using the Opera Presto 2.8 (Presto/2.8) rendering engine, incorporating core-integration-point 131 (.131).

A high-level overview of current web specifications support in Opera products is available on opera.com at: Web specifications support in Opera products: an overview.

Opera articles

For further reference, and where applicable, Opera web specification support table documents now contain hyperlinks to Opera technical articles written by leading subject matter experts. These are sourced from Opera's extensive developer website, dev.opera.com.

Web specifications added since Opera Presto 2.7

Important note

The following web specification items integrated into the Opera Presto rendering engine are identified with their (Presto/2.8.xxx) core-integration-point numbers. This identifies which web specifications are included with Opera product versions, as shown in their user agent strings. Please see the preceding description in The Opera user agent string topic, to associate Opera product versions with the Opera Presto core-integration-points they contain.

Implemented in core-integration-points 90 through 102

Geolocation API improvements

• Improved our implementation of the W3C Geolocation specification. Geolocation is now implemented as described in the W3C Geolocation API Specification (Presto/2.8.94).
  • See: W3C Geolocation API support in Opera Presto 2.8.

CSS:

• Added the CSS Viewport meta property target-densityDpi (Presto/2.8.98).
• Added the CSS -o- prefixed media feature -o-device-pixel-ratio (Presto/2.8.98).
• Added the devicePixelRatio property on the Window object (Presto/2.8.98).
• Added two new CSS cursor property values (Presto/2.8.99):
  • "-o-zoom-in"
  • "-o-zoom-out"

SVG: Cache bidi calculations - WordInfo structs

• Improved RTL/bidi handling in SVG content (Presto/2.8.102).
  • See: W3C SVG Tiny 1.2 Text: Section 10.6.2 Relationship with bidirectionality (similar wording has been included in SVG 1.1 Second Edition).

Implemented in core-integration-points 103 through 115

CSS:

• Added support for the W3C CSS Multi-column Layout Module (Presto/2.8.115).
  • See: W3C CSS Multi-column Layout Module support in Opera Presto 2.8.
  • See: W3C CSS Multi-column Layout Module.

Widgets

• Updated support for the W3C XML Digital Signatures for Widgets (Presto/2.8.104).
  • See: XML Digital Signatures for Widgets support in Opera Presto 2.8.
  • See: W3C Digital Signatures for Widgets.
• Added support for W3C: The Widget Interface (Presto/2.8.104).
  • See: W3C: The Widget Interface.
• Improved support for the W3C Widget Access Request Policy (Presto/2.8.104).
  • See: W3C: Widget Access Request Policy.
• Added support for the view-mode media feature in widgets (Presto/2.8.104).
  • See: W3C: The "view-mode" Media Feature.
• Added support for the defaultlocale attribute of widget element (Presto/2.8.104).
  • See: W3C Widget Packaging and Configuration.

Implemented in core-integration-points 116 through 119

CSS

• Gradients
  • Added partial support for gradients from the CSS3 Image Values/Replaced Content module (Presto/2.8.119).
  • Using the Opera -o- vendor prefix, Opera supports:
    • -o-linear-gradient()
    • -o-repeating-linear-gradient()
  • <color-stop> is supported.
  • <gradient> is only supported in background and background-image.
  • <gradient> is not supported in list-style-image and border-image.
• See: CSS3 Image Values/Replaced Content support in Opera Presto 2.8
• See: W3C CSS Image Values and Replaced Content Module Level 3

Graphics: WebP

Opera Presto adds support for the Google WebP image format (Presto/2.8.116).

• This enhances Opera Turbo's compression performance with images.
• WebP is a new image format that provides lossy compression for photographic images.
• A WebP file consists of VP8 image data, and a container based on the Resource Interchange File Format (RIFF).
  • See: WebP: A new image format for the Web
  • See: RIFF Container

Implemented in core-integration-points 120 through 130

CSS

• Improved the conformance handling of CSS counter names (Presto/2.8.120).
  • Only "identifiers" (quoteless strings) are allowed as CSS counter names as in counter-increment and counter-reset.
• Added support for the "view-mode" media feature in normal web pages (Presto/2.8.124).
  • See: W3C: The "view-mode" Media Feature.
• CSS3 cursor values "zoom-in" and "zoom-out" are now supported without the Opera proprietary -o- prefix (Presto/2.8.127).

SVG

• video.pauseElement() and video.resumeElement() are no longer supported (Presto/2.8.127).

Widgets

• W3C Widgets <update-description> is also now used for Opera Widgets (Presto/2.8.122).

Implemented in core-integration-points 131 through 141

W3C File API

• Added partial support for the W3C File API (Presto/2.8.131).
• See: W3C File API support in Opera Presto 2.8
• See: W3C File API

W3C HTML5 dataset attribute

• Added support for the dataset attribute on elements which exposes data-* attributes on an element. (Presto/2.8.131)
• See: Dev.Opera: An Introduction to Datasets
• See: HTML5 elements, attributes, and APIs support in Opera Presto 2.8
• See: W3C HTML5 Section 3.2.3.8: Embedding custom non-visible data with the data-* attributes

W3C HTML5 Session History and Navigation

• Added support for the history interface (Presto/2.8.133).
• See: HTML5 Session History and Navigation support in Opera Presto 2.8
• See: W3C HTML5 Section 5.4: Session history and navigation

Event handling

• Updated the list of DOM events visible on window, document and element objects (Presto/2.8.136):
  • Events supported by Opera and part of the Window interface of the HTML standard are now exposed on the window object.
  • Events supported by Opera and part of the HTMLDocument interface are now exposed on the HTML document object.
    • onstorage has been removed.
  • Events supported by Opera and part of the HTMLElement interface are exposed on all elements, unless the events are form specific, in which case they remain visible only on form elements.
• See: HTML5 elements, attributes, and APIs support in Opera Presto 2.8
• See: W3C HTML5 Section 3.1.1: Documents in the DOM
• See: W3C HTML5 Section 3.2.2: Elements in the DOM
• See: W3C HTML5 Section 5.2: The Window object

classList attribute

• Enabled the classList attribute for HTML and SVG elements (Presto/2.8.139).
• See: HTML5 elements, attributes, and APIs support in Opera Presto 2.8
• See: W3C HTML5 Section 3.2.3.6: The class attribute

Implemented in core-integration-points 142 through 149

HTML5 <time> element

• Implemented the HTML5 <time> element (Presto/2.8.146).
• See: W3C HTML5 Section 4.6.10: The time element.
• See: W3C HTML5 Section 10.4.17: The time element

Opera Widgets specification

• Default widget size has been overridden from 100x100 to 300x300 (Presto/2.8.142).
• See: Opera Widgets specification

Implemented in core-integration-points 150 through 158

CSS

• Improved deep nesting of the quotes property (Presto/2.8.151).
• See: W3C CSS 2.1 Section 12.3: Quotation marks

Selectors API

• Implemented Element.oMatchesSelector (Presto/2.8.156).
  • Prefixed implementation of the Element interface .matchesSelector method with "o".
  • Note: The refNodes parameter is not supported.
  • See: W3C Selectors API Level 2.

Implemented in core-integration-points 159 through 162

DeviceOrientation Event

• Support is added for the DeviceOrientation Event specification. (Presto/2.8.159)
• See: W3C DeviceOrientation Event Specification

Opera web specification support pages

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