Some characters (* + - /) not displaying

JavaJim · 09-10-2015, 02:52 PM

I have a book about coding that puts the code examples in a different font (mono-spaced). The code examples show up fine - except the math operators are not visible. The dead-tree version of the book does not use a different colour for the symbols. I know the symbols are actually there because if I copy/paste out of Calibre the correct symbols are pasted. I used the book editor to view the html source - I can't find anything in the html that would cause the operators to display any differently.

Any ideas?

Calibre 2.37.1
Windows 7

theducks · 09-10-2015, 03:26 PM

As they say:

Show me the code: (for a bad paragraph or Div)
show the portions CSS for that code
Please use a spoiler tag if more than a dozen lines

JavaJim · 09-11-2015, 08:39 AM

First let me say that none of this is my own - in case it sounded like it was a book I wrote.

The NoOperatorsScreen.png attached is a piece of a screenshot showing how it displays.

The NoOperatorsLiveCSS.png is the LiveCSS view produced from the editor (I've also copied the CSS below the HTML).

Here is the HTML for the paragraph

Code:

<p class="pre">&gt; 4 * 6 + 5<br class="calibre5"/><br class="calibre5"/>[1] 29<br class="calibre5"/><br class="calibre5"/>&gt; (4 * 6) + 5<br class="calibre5"/><br class="calibre5"/>[1] 29<br class="calibre5"/><br class="calibre5"/>&gt; 4 * (6 + 5)<br class="calibre5"/><br class="calibre5"/>[1] 44</p>

Here is the same HTML for the paragraph - but I have edited it for formatting reasons (at each <br>)

Code:

<p class="pre">&gt; 4 * 6 + 5<br class="calibre5"/>
<br class="calibre5"/>
[1] 29<br class="calibre5"/>
<br class="calibre5"/>
&gt; (4 * 6) + 5<br class="calibre5"/>
<br class="calibre5"/>
[1] 29<br class="calibre5"/>
<br class="calibre5"/>
&gt; 4 * (6 + 5)<br class="calibre5"/>
<br class="calibre5"/>
[1] 44</p>

CSS for class="pre"

Code:

.pre {
    display: block;
    font-family: "Courier New";
    font-size: 0.75em;
    text-align: left;
    margin: 10pt 0 10pt 20pt
    }

CSS for class="calibre" (this is the class for <body>)

Code:

.calibre {
    display: block;
    font-size: 1em;
    padding-left: 0;
    padding-right: 0;
    margin: 0 5pt
    }

CSS for class="calibre5"

Code:

.calibre5 {
    display: block
    }

theducks · 09-11-2015, 10:33 AM

I made 1 change (just for a fallback if the named font is unavailable, a good practice

)

Where are you seeing colored/missing symbols? Your device?

Code editors (like used in the editor) Encode Syntax of various parts for readability display ONLY

The code is simple, basic HTML (no color calls) for the OUTPUT

JavaJim · 09-11-2015, 10:45 AM

I tried your fix - no go. I've also played with background and foreground colours, as well as different fonts. Still not displaying.

(Your file displays though.)

This is occurring in Calibre reader, on Windows 7, laptop. Nothing exotic.

theducks · 09-11-2015, 11:15 AM

I don't think there is any differences between Calibres for various Windows versions

I suspect you have a ebook-viewer configuration override in place

Use the Restore Defaults button at the bottom of the viewer config screen

Look at the same book using the Editor Preview pane. The viewer allows stylesheets to be overridden (although, the inspector does not indicate this)

Could the monospaced font on your system be damaged (modified)?

JavaJim · 09-11-2015, 11:34 AM

BINGO!

Haven't investigated yet to see if the "Courier New" font is damaged, but forcing a different mono-spaced font (via the stylesheet) shows the characters.

Thanks for your help.

Jim

JavaJim · 09-11-2015, 11:40 AM

Previously I was making changes in the reader settings (to try a new font, etc.) but didn't realize a stylesheet was overriding it. (I've learned a lot about what an epub is over the last couple of days).

Thanks again,
Jim

09-10-2015, 02:52 PM	#1
JavaJim Junior Member Posts: 6 Karma: 10 Join Date: Jul 2014 Location: Sundridge, ON, CA Device: Nexus4	*Some characters ( + - /) not displaying** I have a book about coding that puts the code examples in a different font (mono-spaced). The code examples show up fine - except the math operators are not visible. The dead-tree version of the book does not use a different colour for the symbols. I know the symbols are actually there because if I copy/paste out of Calibre the correct symbols are pasted. I used the book editor to view the html source - I can't find anything in the html that would cause the operators to display any differently. Any ideas? Calibre 2.37.1 Windows 7

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09-10-2015, 03:26 PM	#2
theducks Well trained by Cats Posts: 30,884 Karma: 59840450 Join Date: Aug 2009 Location: The Central Coast of California Device: Kobo Libra2,Kobo Aura2v1, K4NT(Fixed: New Bat.), Galaxy Tab A	As they say: Show me the code: (for a bad paragraph or Div) show the portions CSS for that code Please use a spoiler tag if more than a dozen lines

09-11-2015, 10:45 AM	#5
JavaJim Junior Member Posts: 6 Karma: 10 Join Date: Jul 2014 Location: Sundridge, ON, CA Device: Nexus4	I tried your fix - no go. I've also played with background and foreground colours, as well as different fonts. Still not displaying. (Your file displays though.) This is occurring in Calibre reader, on Windows 7, laptop. Nothing exotic.

09-11-2015, 11:15 AM	#6
theducks Well trained by Cats Posts: 30,884 Karma: 59840450 Join Date: Aug 2009 Location: The Central Coast of California Device: Kobo Libra2,Kobo Aura2v1, K4NT(Fixed: New Bat.), Galaxy Tab A	I don't think there is any differences between Calibres for various Windows versions I suspect you have a ebook-viewer configuration override in place Use the Restore Defaults button at the bottom of the viewer config screen Look at the same book using the Editor Preview pane. The viewer allows stylesheets to be overridden (although, the inspector does not indicate this) Could the monospaced font on your system be damaged (modified)?

09-11-2015, 11:34 AM	#7
JavaJim Junior Member Posts: 6 Karma: 10 Join Date: Jul 2014 Location: Sundridge, ON, CA Device: Nexus4	BINGO! Haven't investigated yet to see if the "Courier New" font is damaged, but forcing a different mono-spaced font (via the stylesheet) shows the characters. Thanks for your help. Jim

09-11-2015, 11:40 AM	#8
JavaJim Junior Member Posts: 6 Karma: 10 Join Date: Jul 2014 Location: Sundridge, ON, CA Device: Nexus4	Previously I was making changes in the reader settings (to try a new font, etc.) but didn't realize a stylesheet was overriding it. (I've learned a lot about what an epub is over the last couple of days). Thanks again, Jim

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