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Accessibility: Use Uploaded File Descriptions

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The file upload dialog asks for a description of the image or file to be uploaded. Use this as the default alt-text for the image and as a title attribute for a file link.
This commit is contained in:
Jacques Distler 2007-10-09 02:51:38 -05:00
parent 179a0a9cb2
commit 0eb723e125
3 changed files with 20 additions and 12 deletions
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23
lib/url_generator.rb
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@ -17,15 +17,16 @@ class AbstractUrlGenerator
known_page = web.has_page?(name)
else
known_page = web.has_file?(name)
description = web.description(name)
end
case link_type
when :show
page_link(mode, name, text, web.address, known_page)
when :file
file_link(mode, name, text, web.address, known_page)
file_link(mode, name, text, web.address, known_page, description)
when :pic
pic_link(mode, name, text, web.address, known_page)
pic_link(mode, name, text, web.address, known_page, description)
else
raise "Unknown link type: #{link_type}"
end
@ -37,11 +38,12 @@ class UrlGenerator < AbstractUrlGenerator
private
def file_link(mode, name, text, web_address, known_file)
def file_link(mode, name, text, web_address, known_file, description)
title = CGI::escapeHTML(CGI::unescapeHTML( description || text))
case mode
when :export
if known_file
%{<a class="existingWikiWord" href="#{CGI.escape(name)}.html">#{text}</a>}
%{<a class="existingWikiWord" title="#{title}" href="#{CGI.escape(name)}.html">#{text}</a>}
else
%{<span class="newWikiWord">#{text}</span>}
end
@ -49,7 +51,7 @@ class UrlGenerator < AbstractUrlGenerator
if known_file
href = @controller.url_for :controller => 'file', :web => web_address, :action => 'file',
:id => name
%{<a class="existingWikiWord" href="#{href}">#{text}</a>}
%{<a class="existingWikiWord" title="#{title}" href="#{href}">#{text}</a>}
else
%{<span class="newWikiWord">#{text}</span>}
end
@ -57,7 +59,7 @@ class UrlGenerator < AbstractUrlGenerator
href = @controller.url_for :controller => 'file', :web => web_address, :action => 'file',
:id => name
if known_file
%{<a class="existingWikiWord" href="#{href}">#{text}</a>}
%{<a class="existingWikiWord" title="#{title}" href="#{href}">#{text}</a>}
else
%{<span class="newWikiWord">#{text}<a href="#{href}">?</a></span>}
end
@ -93,17 +95,18 @@ class UrlGenerator < AbstractUrlGenerator
end
end
def pic_link(mode, name, text, web_address, known_pic)
def pic_link(mode, name, text, web_address, known_pic, description)
alt_text = CGI::escapeHTML(CGI::unescapeHTML( description || text))
case mode
when :export
if known_pic
%{<img alt="#{text}" src="#{CGI.escape(name)}" />}
%{<img alt="#{alt_text}" src="#{CGI.escape(name)}" />}
else
%{<img alt="#{text}" src="no image" />}
end
when :publish
if known_pic
%{<img alt="#{text}" src="#{CGI.escape(name)}" />}
%{<img alt="#{alt_text}" src="#{CGI.escape(name)}" />}
else
%{<span class="newWikiWord">#{text}</span>}
end
@ -111,7 +114,7 @@ class UrlGenerator < AbstractUrlGenerator
href = @controller.url_for :controller => 'file', :web => web_address, :action => 'file',
:id => name
if known_pic
%{<img alt="#{text}" src="#{href}" />}
%{<img alt="#{alt_text}" src="#{href}" />}
else
%{<span class="newWikiWord">#{text}<a href="#{href}">?</a></span>}
end