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https://issues.apache.org/jira/browse/BATIK-1093?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Glenn Adams closed BATIK-1093.
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> Add support for background on text content elements
> ---------------------------------------------------
>
> Key: BATIK-1093
> URL: https://issues.apache.org/jira/browse/BATIK-1093
> Project: Batik
> Issue Type: New Feature
> Reporter: Glenn Adams
> Assignee: Glenn Adams
> Fix For: trunk
>
>
> An oft requested feature in SVG is the ability to draw a background color on
> text and tspan. While it has been suggested that this can be done using a
> separate rect element, it is either impractical or highly inconvenient to do
> this because the bounding box and/or line height geometry of this rect is not
> available at authoring time.
> Given the greater use of CSS features in SVG 2.0 and the general desire to
> support CSS properties, it is proposed that the 'background-color' [1]
> property be supported on both text and tspan elements.
> [1] http://www.w3.org/TR/CSS2/colors.html#background-properties
> In addition, it is desirable to allow the author to customize the
> presentation of the background decoration by distinguishing between the use
> of bounding box versus line height in order to control the block progression
> dimension. Further, it is desirable to allow the author to outset or inset
> the edges of the background decoration.
> In order to support these latter two features, it is proposed that the
> following additional properties be supported:
> * background-mode, with values 'bbox' or 'line-height', default of line-height
> * background-outline-{top,right,bottom,left} takes <length> value, where
> positive is outset and negative is inset, and default is 0
> * background-outline, a shorthand for the above, with value syntax
> <length>{1,4}, where 1 value expresses out(in)set on all four edges, 2 values
> express out(in)set on top/bottom and right/left, 3 values express out(in)set
> on top, left/right, bottom, and 4 values express out(in)set on top, right,
> bottom, left
> This background outline operates similarly to the CSS outline-width property
> [2], except that (1) the outline color is set to the background color, (2)
> the outline style is solid, and (3) the outline widths can be independently
> specified for each edge (instead of the same value applying to all edges). In
> addition, this outline is drawn adjacent to the edges of the background
> rectangle determined by the 'background-mode' property, i.e., bounding box or
> line height.
> [2] http://www.w3.org/TR/CSS21/ui.html#propdef-outline-width
> It might be argued that this background-outline is equivalent to the CSS
> 'border' property semantics. We do not take that position here because it may
> be desirable to add border or padding support to the SVG text and tspan
> elements in the future, and we don't wish to influence the possible semantics
> of doing so. If border and padding were to be added in the future, then the
> background-outline would effectively intersect with the border or padding
> regions, but be drawn before, not after (as is done with the CSS outline
> property); i.e., the drawing order should be background with background
> outline, text with decorations, then borders (if added in future), then CSS
> outline (if added in future).
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