Saving over the top of the existing logo.svg within a custom Drupal theme I am building. The logo does not show on the page (Firefox) and shows extremely large on Safari.
When "inspecting element" I can see that if I add width="" (and apply any number) - then the logo will appear in Firefox, and resize in Safari.
But I do not know how to apply a width to the site_logo within the Drupal theme files. Where would I do this, or alternatively how else would I fix this issue.
The site is in Drupal 8. I've tried moving the branding block into different sections (Nav, sidebar, Content, etc.) but it doesn't rectify the incorrect width issues.
Consider that SVG images not always have height and width dimensions in their markup, and that adding an SVG file with no dimensions set could affect the styling of your theme.
So open your SVG file in a text editor and ensure to set width, height and/or viewBox according your needs. Or try editing it with some vector image editing tool like Adobe Illustrator or Sketch or Inkscape.
<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"
width="100" height="50"
viewBox="0 0 200 100">
<rect x="20" y="20" width="160" height="60"
fill="limegreen" stroke="black" stroke-width="2px" />
</svg>
Related
I am developing a web page trying to focus on accessibility, and created different graphics in SVG to go in it. After reading different sites online (1, 2, and 3), I included the <title> and <desc> tags, and added the attributes role and aria-labelledby to make the SVGs more accessible.
Some of those sources, seem to claim (directly or indirectly) that using SVG inline is better for accessibility; so I ran a few tests with NVDA to see the differences, but I fail to see any at first sight.
For example, using a simple SVG:
<svg width="100" height="100" viewBox="0 0 100 100" role="img" aria-labelledby="title desc">
<title id="title">Abstract Forms</title>
<desc id="desc">Red square containing a white circle containing a blue triangle pointing up.</desc>
<g stroke="none" stroke-width="0">
<rect x="0" y="0" width="100" height="100" fill="red" />
<circle cx="50" cy="50" r="40" fill="white" />
<path d="M 50,20 80,70 20,70 Z" fill="blue" />
</g>
</svg>
If I add it to the page like that, NVDA reads "Graphic. Abstract Forms. Red square containing a white circle containing a blue triangle pointing up."
And if I save it into a myImg.svg file, and add it to the page like this:
<img src="myImg.svg" alt="Red square containing a white circle containing a blue triangle pointing up" title="Abstract Forms" />
NVDA then reads "Graphic. Red square containing a white circle containing a blue triangle pointing up." (same thing as before, just not reading the title).
This may be an NVDA thing, and other screen readers may do it differently, but there doesn't seem to be any considerable difference between the two. At least not to claim that inlining the SVG is better for accessibility.
Then I thought it could be related to reading additional information; for example, if there was some text within the graphic. So I added a <text x="50" y="50" fill="black">Hello World</text> at the end of the SVG... but NVDA read the same thing as before; not even selecting the text it will read it (again I don't know if this is an NVDA thing and if other screen readers do it differently).
So my questions are: what are the differences between having SVG inline or as an image? And what are the benefits (for accessibility) of having the SVG inline?
You probably already self-answered your question.
Inline-svg is interpreted as part of the html webpage. So your svg title and description are interpreted as well and read by the screen reader.
When using an ‘img‘ tag to include the svg, the file is handled like an external file (like a jpg) and so only the ‘alt‘ attribute of the img tag (= the image description) is interpreted/read by the screen reader.
I have currently no source and can't test it a the moment, but I think there are also differences for links within the svg code: Links within inline svg are read by the screenreader, links within external svg files not.
I created a very small True Type font with a simple square as the only glyph at char code 0xe000. It is included both as a standard glyph and as an SVG in the 'SVG ' table, as defined in the SVG Glyphs in OpenType Specification
The problem is that the SVG glyph is rendered about 2% smaller on Firefox than the TrueType glyph, although it should have the same size. The size of the TrueType glyph is the correct one.
Here is a JSFiddle (font size 240px with the background set to cyan) and this is the output on Firefox (left) and on Chrome (identical on IE11 and Edge14)
I have tried the same with other, more complex shapes. Each time the SVG is a little bit smaller than the standard glyph.
Does anybody know if this is the indended or specified behaviour (embedded SVG must be 2% larger to render the same size)? Or is this simply a bug in Firefox and I should issue a bug report? Or am I doing something wrong?
Detailed Information about the SVG and the Font
This is the SVG:
<svg id="glyph2" version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="1024" height="1024"><g fill="#000000" fill-rule="nonzero" stroke="none" stroke-width="1" stroke-linecap="butt" stroke-linejoin="miter" stroke-miterlimit="10" stroke-dasharray="" stroke-dashoffset="0" font-family="none" font-weight="none" font-size="none" text-anchor="none" style="mix-blend-mode: normal"><g><path d="M256,-640l512,0l0,512l-512,0z"/></g></g></svg>
The glyph data in the font#s "glyf" table looks like this:
Here is the data from the font's "hhea" table:
The test font can be donwloaded from http://s000.tinyupload.com/?file_id=45977357366223472123
I have a simple cut-out rectangle with text in the middle.
<svg>
<defs>
<mask id="mytext">
<rect width='100%' height='100%' fill='white'/>
<text>Welcome</text>
</mask>
</defs>
<rect width='100%' height='100%' fill='blue' mask="url(#mytext)"/>
</svg>
However when viewing from a retina display the text edges become pixelated.
It does't happen if I only use text without masking it, but as soon the mask is used it breaks everything out.
EDIT: By Retina Display I mean, iOS and OSX both latest versions. All Browsers. I believe it might be a pixel density issue.
The interesting is while having
<text fill='url(#mypattern)'>Welcome</text>
The text is rendered sharply perfect. The problem lies only with masks being applied.
Here it is a jsfiddle sample (please make sure to test on your retina display enabled device).
And here is a screenshot displaying the difference on iPhone (note that the edges of the text below and how pixelated it looks).
I'm noting a difference between browsers in displaying text forced right-to-left and also using text-anchor="end".
<?xml version="1.0" standalone="no"?>
<svg xmlns="http://www.w3.org/2000/svg" version="1.1" >
<text x="10" y="50" font-size="30" font-family="sans-serif" writing-mode="rl" direction="rtl" unicode-bidi="bidi-override" text-anchor="end" stroke="green" fill="green">
Force RTL
</text>
</svg>
In Chrome(v 27.0.1453.93 m) and I.E.(v 9.0.8112.16421), the text is shown as I would expect, with glyph stroking starting from the end point of the text and progressing to the left. With the example above, it is displayed in the upper left corner of the browser.
In Firefox (v 20.0.1) glyph stroking, with text-anchor="end", is starting from the start point of the text and the display is off the page. If I remove the text-anchor attribute, Firefox displays as Chrome and I.E. do with the text-anchor.
My questions are
Does anyone understand what's happening here? Or is this a FF bug?
If there's no work-around, how can I switch between user-agents in the SVG so for Firefox, I can avoid using the text-anchor?
Thanks very much
It's a bug in Firefox. Fortunately it will be fixed reasonably soon (not sure exactly when) as we're revamping/rewriting text support in SVG. If you want to see it working properly, download a Firefox nightly type about:config in the URL bar and set svg.text.css-frames.enabled to true. So be careful about user agent tests because this will get fixed before too long.
I've got an SVG element that I've created with Inkscape. I then take that SVG and put in as part of an XSL-FO stylesheet that is used to transform XML data and then passed through the IBEX renderer to create a pdf (which is usually then printed). As an example, I have elements in the svg/stylesheet that look like this (extra noise due to the Inkscape export):
<text x="114" x="278.36218" id="id1" xml:space="preserve" style="big-long-style-string-from-inkscape">
<tspan x="114" y="278.36218" id="id2" style="style-string">
<xsl:value-of select="Alias1"/>
</tspan>
</text>
My problem lies in the fact that I don't know how big this text area is going to be. For this particular one, I've got an image to the right of the text in the SVG. However, if this string is the maximum allowed number of W's, it's way too long and goes over the image. What I'd like (in a perfect world) is a way to tell it how many pixels wide I want the text block to be and then have it automatically make the text smaller until it fits in that area. If I can't do that, truncating the text would also work. As a last ditch resort, I'm going to use a fixed width font and do the string truncation myself in the XML generation, although that creates something both less usable and less pretty.
I've poked around the SVG documentation and looked into flowRegions a bit as well as paths, but neither seem to be be quite what I want (maybe they are though). If it helps, here's that style string that Inkscape generates:
"font-size:20px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:start;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans;-inkscape-font-specification:Sans"
Thanks in advance for the help.
You have text of arbitrary line length (in terms of characters) and you want to scale it to fit inside a fixed amount of space? The only way I can think of to rescale text to a fixed size is to place it inside an svg element and then scale the SVG to that size:
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<svg width="100%" height="100%" version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
<title>Resizing Text</title>
<defs>
<svg id="text-1" viewBox="0 0 350 20">
<text id="text-2" x="0" y="0" fill="#000" alignment-baseline="before-edge">It's the end of the world as we know it, and I feel fine!</text>
</svg>
</defs>
<rect x="500" y="100" width="200" height="40" fill="#eee" />
<use x="510" y="110" width="180" height="20" xlink:href="#text-1" />
</svg>
However, as seen above, the viewBox on the encapsulating svg element needs to be set to the width of the text, which you presumably don't know.
If you're referencing this SVG inside a user agent with scripting available (e.g. a web browser) then you could easily write a script to capture the width of the text or tspan element and set the viewBox accordingly.