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Old 08-02-2017, 03:27 PM   #1
DrChiper
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calibre 3.5: previewer has issues with tables
Today I had some issues on creating a table which used rowspan. The result in the calibre previewer did not show some borders, nor when viewing the epub with calibre. Only after a long time of trying and trying, it turned out that the resulting epub page was showing correct on my e-reader itself, but just not on the calibre (pre)viewer.

To test I used the following (test) html page:
Spoiler:

<?xml version='1.0' encoding='utf-8'?>
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">

<head>
<style>
table {
border: solid thin;
border-collapse: collapse;
}
caption {
padding-bottom: 0.5em;
}
th, td {
border: solid thin;
padding: 0.5em 2em;
}
td {
white-space: nowrap;
}
th {
font-weight: normal;
}
td {
border-style: none solid;
vertical-align: top;
}
th {
padding: 0.2em;
vertical-align: middle;
text-align: center;
}
body {
padding: 1em;
}
</style>
</head>

<body>

<h1>TEST</h1>

<table id="table-example-1"><caption>Specification values: <b>Steel</b>, <b>Castings</b>,
Ann. A.S.T.M. A27-16, Class B;* P max. 0.06; S max. 0.05.</caption>
<thead><tr><th rowspan="2">Grade.</th>
<th rowspan="2">Yield Point.</th>
<th colspan="2">Ultimate tensile strength</th>
<th rowspan="2">Per cent elong. 50.8*mm or*2*in.</th>
<th rowspan="2">Per cent reduct. area.</th>
</tr><tr><th>kg/mm<sup>2</sup></th>
<th>lb/in<sup>2</sup></th>
</tr></thead><tbody><tr><td>Hard</td>
<td>0.45 ultimate</td>
<td>56.2</td>
<td>80,000</td>
<td>15</td>
<td>20</td>
</tr><tr><td>Medium</td>
<td>0.45 ultimate</td>
<td>49.2</td>
<td>70,000</td>
<td>18</td>
<td>25</td>
</tr><tr><td>Soft</td>
<td>0.45 ultimate</td>
<td>42.2</td>
<td>60,000</td>
<td>22</td>
<td>30</td>
</tr></tbody></table>

</body>

</html>


The code above produced the following result in the calibre previewer (picture1), in which borders where missing (indicated by red in picture2). These missing borders are showing on my e-readers.

Is this a known anomaly of the calibre (pre)viewer?
Attached Thumbnails
Click image for larger version Name: calibre1.jpg Views: 191 Size: 57.4 KB ID: 158226   Click image for larger version Name: calibre2.jpg Views: 190 Size: 55.3 KB ID: 158227  
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Old 08-02-2017, 06:46 PM   #2
kovidgoyal
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It is a bug in the version of webkit shipped with Qt. Using a newer version of webkit fixes it, but it will be some time before calibre ships with a newer version of webkit. You can use the new browser viewer in the mentime which will not have this bug.
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Old 08-04-2017, 02:33 AM   #3
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Thanks Kovid.
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