Module: HtmlToPlainText
- Included in:
- Premailer, TestHtmlToPlainText
- Defined in:
- lib/html2email/vendor/premailer/lib/premailer/html_to_plain_text.rb
Overview
Support functions for Premailer
Instance Method Summary collapse
-
#convert_to_text(html, line_length = 65, from_charset = 'UTF-8') ⇒ Object
Returns the text in UTF-8 format with all HTML tags removed.
Instance Method Details
#convert_to_text(html, line_length = 65, from_charset = 'UTF-8') ⇒ Object
Returns the text in UTF-8 format with all HTML tags removed
TODO:
- add support for DL, OL
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# File 'lib/html2email/vendor/premailer/lib/premailer/html_to_plain_text.rb', line 11 def convert_to_text(html, line_length = 65, from_charset = 'UTF-8') r = Text::Reform.new(:trim => true, :squeeze => false, :break => Text::Reform.break_wrap) txt = html # decode HTML entities he = HTMLEntities.new txt = he.decode(txt) # handle headings (H1-H6) txt.gsub!(/(<\/h[1-6]>)/i, "\n\\1") # move closing tags to new lines txt.gsub!(/[\s]*<h([1-6]+)[^>]*>[\s]*(.*)[\s]*<\/h[1-6]+>/i) do |s| hlevel = $1.to_i htext = $2 htext.gsub!(/<br[\s]*\/?>/i, "\n") # handle <br>s htext.gsub!(/<\/?[^>]*>/i, '') # strip tags # determine maximum line length hlength = 0 htext.each { |l| llength = l.strip.length; hlength = llength if llength > hlength } hlength = line_length if hlength > line_length case hlevel when 1 # H1, asterisks above and below htext = ('*' * hlength) + "\n" + htext + "\n" + ('*' * hlength) when 2 # H1, dashes above and below htext = ('-' * hlength) + "\n" + htext + "\n" + ('-' * hlength) else # H3-H6, dashes below htext = htext + "\n" + ('-' * hlength) end "\n\n" + htext + "\n\n" end # links txt.gsub!(/<a.*href=\"([^\"]*)\"[^>]*>(.*)<\/a>/i) do |s| $2.strip + ' ( ' + $1.strip + ' )' end # lists -- TODO: should handle ordered lists txt.gsub!(/[\s]*(<li[^>]*>)[\s]*/i, '* ') # list not followed by a newline txt.gsub!(/<\/li>[\s]*(?![\n])/i, "\n") # paragraphs and line breaks txt.gsub!(/<\/p>/i, "\n\n") txt.gsub!(/<br[\/ ]*>/i, "\n") # strip remaining tags txt.gsub!(/<\/?[^>]*>/, '') # wrap text txt = r.format(('[' * line_length), txt) # remove linefeeds (\r\n and \r -> \n) txt.gsub!(/\r\n?/, "\n") # strip extra spaces txt.gsub!(/\302\240+/, " ") # non-breaking spaces -> spaces txt.gsub!(/\n[ \t]+/, "\n") # space at start of lines txt.gsub!(/[ \t]+\n/, "\n") # space at end of lines # no more than two consecutive newlines txt.gsub!(/[\n]{3,}/, "\n\n") txt.strip end |