*.tif attachments are not displayed properly

[rosali]

Roundcube tries to display *.tif attachments as inline image. Proper display fails.

Steps to reproduce the issue:

• Attach any *.tif file to a message and view the message in preview pane or in full display mode.

Example email has been sent to ALEC. Please feel free to share the message with other devs, but do not expose private content anywhere in the web, please. Thanks!

Just a reminder; you mentioned in your reply:

"This is a bug c.a. line 1109 of mail/func.inc."

[alec]

After some more investigation I'm not sure what we can do about this. There are some browsers supporting tiff images (IE, Safari, Konqueror), there are also some plugins for other browsers. So, we can't just use simple browser detection.

[rosali]

I would make it not to display *tif(f) attachments inline. Just handle these attachments as "normal" attachments. IMO, that's enough.

[alec]

There was a request to display .tif images inline - #1486775

[alec]

It looks that tif support detection isn't so hard. Create a tif image with size 1x1 px.

var img = new Image();
// on browsers without TIF support the onload will be not triggered
img.onload = function() {
    alert('TIF supported');
};
img.onerror = function() {
    alert('TIF not supported');                       
};
img.src = 'empty.tif';

I tested it with Rekonq, Firefox, Chromium, Opera. So, we can detect tif support (once a session) and display tif images when supported. What's more, for other browsers we could use ImageMagick? to convert tif to jpeg.

[alec]

Done in dev-browser-capabilities branch. However I postpone this to 0.9.

[alec]

Added Tiff to Jpeg conversion. Merged with master.