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SMIL:CSS Animation: Difference between revisions
→Implementing getOverrideStyle()
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=== Implementing <code>getOverrideStyle()</code> === | === Implementing <code>getOverrideStyle()</code> === | ||
Note that Gecko doesn't currently implement <code>getOverrideStyle()</code>. Here's a basic outline of how this function could be implemented (& is implemeted in the patch linked above): | Note that Gecko doesn't currently implement <code>getOverrideStyle()</code>. Here's a basic outline of how this function could be implemented (& is implemeted in the patch linked above): | ||
* Add a new <code>nsDOMCSSDeclaration</code> member variable on each <code>nsStyledElement</code>, to be used as a backing store for that element's override style. | * Add a new <code>nsRefPtr<nsDOMCSSDeclaration> mOverrideStyle</code> member variable on each <code>nsStyledElement</code>, to be used as a backing store for that element's override style. | ||
* | * I've based the implementation of this largely on the content style rule in SVG. (See <code>mContentStyleRule</code> in [http://mxr.mozilla.org/seamonkey/source/content/svg/content/src/nsSVGElement.h nsSVGElement.h] and [http://mxr.mozilla.org/seamonkey/source/content/svg/content/src/nsSVGElement.cpp nsSVGElement.cpp] ) | ||
* The | * The override style is queryable (& editable) via a new method <code>nsIContent::GetOverrideStyle</code>. By default, this method has an empty implementation, but <code>nsStyledElement</code> overrides this method to return its <code>mOverrideStyle</code>. | ||
* See [http://hg.mozilla.org/users/dholbert_mozilla.com/smil-patches/file/tip/getoverridestyle.patch patch] for more details (it's fairly small) | * See [http://hg.mozilla.org/users/dholbert_mozilla.com/smil-patches/file/tip/getoverridestyle.patch patch] for more details (it's fairly small) | ||