Solve word count bug in mod_feed + some code review

[n9iels]

About this PR

This PR solves a bug with the word count parameter of mod_feed. If you load a feed with HTML tags (for example: http://community.joomla.org/blogs/community.feed?type=rss) and set the word count to 20 there are way less than 20 words visible. The two things that cause this problem:

• JHtml::_('string.truncate') counts the characters, not the words of the string
• HTML tags like <a href="http://link.nl"> are counted too

This PR change the text of the parameter to Character count and I also adds strip_tags() for the character count.

Other changes in this PR are code style and some change to make the code more readably and logic.

Test instructions

1. Make a mod_feed module and use http://community.joomla.org/blogs/community.feed?type=rss as Feed URL, set the RTL Feed paramter on "No" and all other parameters on "Yes" for now
2. Set the "Word count" parameter on 20, and confirm the feed displays less than 20 words on the front-end
3. Apply the patch, and confirm the parameter is now called "Character limit" and the amount of characters is better now (Maybe still not 20 characters, because the function don't cut words in half)
4. Confirm all parameters are working like they use to do
5. Install an RTL language (Persion for example), and test the "RTL Feed" parameter for this language. If "RTL Feed" is set to no, even on RTL languages the feed must be displayed LTR

[wilsonge]

Please can you use spaces to align here! Thanks :)

[n9iels]

Changed 👍

[Ruchiranga]

I have tested this item 🔴 unsuccessfully on 61f6253

### Tested successfully

• The amount of characters shown has become better. See
  Before applying the patch and
  After applying the patch .
• All other parameters except "RTL Feed" work the way they should.

Tested unsuccessfully

• The parameter is now called "Character Count" not "Character limit"
• After installing Persian and using it, even if the "RTL Feed" is set to no, the feed is displayed RTL.
  (I was expecting the feed to be left aligned. Correct me if what I understood from the term "displayed LTR" is wrong)

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[joomla-cms-bot]

This PR has received new commits.

CC: @Ruchiranga

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[joomla-cms-bot]

This PR has received new commits.

CC: @Ruchiranga

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[n9iels]

@Ruchiranga Thanks for testing! Yes you're right, the RTL function wasn't working, I used a wrong variable. I also changed the label of the parameter to Character limit, that is a better label indeed.

Can you please test again, and confirm the problems are solved?

[Ruchiranga]

I have tested this item ✅ successfully on 607a440

* The amount of characters shown has become better. See
Before applying the patch and
After applying the patch.

• All other parameters including "RTL Feed" work the way they should.
• The parameter is now called "Character limit"

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[coolcat-creations]

I´m not sure if this breaks something on existing sites because even if the wordcount didn´t work right before
i don´t know if we can just change it to character limit?

Isn´t it better to fix the wordcount instead?

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[brianteeman]

Changing from word count to character count will break peoples sites. Imagine I have it set to 10

before

my news feed of approximately ten words excepting html bug

after

my news fe

So with this change form word to character count it cannot be accepted.

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[brianteeman]

If you want to update the PR to retain the word count then this can be tested otherwise I am afraid it will have to be closed

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[brianteeman]

Closed for the reason above

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