![]() The value returned by that method can be directly used in the textLength attribute of a to make the text exactly fit.įor example, by opening the SVG from Example 7-X3 in a browser, and then opening up the developer’s console, you can find the path length as follows: document. The browser can calculate it for you with the getTotalLength() method on the element. When adjusting the textLength to match the path, you’ll need to know the length of the path you’re using. textLength can only be used reliably for elements without children. It should work on any text element, including, but browser implementations are buggy in conflicting ways, and some will ignore it. The markup in Example 7-X3 was the result of a lot of tweaking and testing in different browsers, and it still isn’t perfectly aligned everywhere.Īs we mentioned in “Beyond Horizontal: Rotated and Vertical Text”, textLength declares the total length you want the text to meet, and browsers adjust the letter spacing to make it fit. Code that looked nice in one browser was horribly out of alignment in others. Creating this layout was more difficult than expected, due to issues with textLength on nested elements, textLength in combination with centered text, and inconsistent treatment of whitespace. The textLength attribute constrains the text to match the circumference of the circle (2π times the radius), and a rotational transform is used to tweak the alignment so that the ampersand (&) is centered at the base of the circle. As we mentioned in Chapter 6, you can’t draw a complete circle with a single arc segment, because it doesn’t have enough positioning information. The circle is created with a element containing two half-circle arcs of 150-unit radius. Controlling text length for text on a closed path Circular Text Path text One for All Just remember that now your total path is twice as long, so percentage startOffset values need to be divided in half.Įxample 7-X3. Tools for changing the start point of a path aren’t as common as for reversing it, but in most graphic editors you can force the matter by breaking and then re-joining your path at the chosen point.Īlternatively, you can avoid the cut-off text issue by duplicating the path data string inside the element, so that text will happily wrap around and continue along a second “lap” of the path. (SVG 2 proposes to change this, but browsers aren’t yet on board.) Unfortunately, startOffset is not enough here: although it shifts the text around the shape, it doesn’t change the fact that text gets cropped off when it reaches the path start and end points. If you’re manipulating SVG with scripts rather than visual editors, Mike Kamermans has created a JavaScript utility to do the reversal.įinally, you may want to adjust the starting point of the text to a position other than the starting point from the path code. In Inkscape, select the path, and use the Reverse option in the Path menu. This assumes that the path is a compound path (Object → Compound Path → Make). In Adobe Illustrator, there is a Reverse Path Direction command in the application’s Attributes panel (you may have to use Show Options in the top right corner of the panel to see the path direction controls). If your path is in the wrong direction, your graphics editor can reverse it for you: In either case, it is possible to end up with upside-down letters. If the path is counter-clockwise, the text will be on the inside. If your paths have a clockwise winding order, the text will be on the outside of the shape. The text will proceed along the path in the direction the path is drawn in the code. If a counter-clockwise circle or ellipse is all you need, Dan Hansen’s neat little JavaScript tool to grab the equivalent path data. In some editors, including Illustrator, moving any point on a regular shape, even slightly, will also convert it into a path. In Illustrator, use Object → Compound Path → Make in Inkscape, use Path → Object to Path. Most visual editors have tools to convert the shape into a path. If you have a basic shape, and want to convert it to a without having to code or draw it one point at a time, there are various tools you can use: This can be somewhat frustrating, as they (along with ellipses) are the most common shapes people want to wrap text around. In SVG 1.1 (and all existing browsers), the “path” used by a layout must truly be a element: you can’t yet make text ride a or. ![]() ![]() Book Home Chapter 7 Summary All Online Extras Perfecting Paths for Using SVG with CSS3 and HTML5 - Supplementary Material Using SVG with CSS3 and HTML5 - Supplementary MaterialĮxample code and online extras for the O'Reilly Media book by Amelia Bellamy-Royds, Kurt Cagle, and Dudley Storey.
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