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Ingo Paulsen

2007-Mar-25 18:10 UTC

Insert text into text area field with RJS

Hi,

I''d like to insert/append some default text into a text area after
clicking on an image button ''test.png'' in edit.rhtml:

<%= link_to image_tag("test.png"), url => { :action =>
:new_text } %>

Action:

# article_body is the textarea''s id.

def new_text
  render :update do |page|
    page.insert_html :bottom, :article_body, "text\n"
  end
end

Not surprisingly insert_html doesn''t work properly in this innerHTML
context. But how it is possible to append text to existing one?

page[:article_body][:value] = "text"

e.g. overwrites the old content completely.

Do I need to use request.raw_post or reques.query_string in some way?


Best regards
Ingo

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eden li

2007-Mar-25 19:29 UTC

head link

Re: Insert text into text area field with RJS

When in doubt, drop to javascript:

page << "$(''article_body'').value +=
''blah''"

On Mar 26, 2:10 am, Ingo Paulsen
<rails-mailing-l...-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org>
wrote:> Hi,
>
> I''d like to insert/append some default text into a text area after
> clicking on an image button ''test.png'' in edit.rhtml:
>
> <%= link_to image_tag("test.png"), url => { :action =>
:new_text } %>
>
> Action:
>
> # article_body is the textarea''s id.
>
> def new_text
>   render :update do |page|
>     page.insert_html :bottom, :article_body, "text\n"
>   end
> end
>
> Not surprisingly insert_html doesn''t work properly in this
innerHTML
> context. But how it is possible to append text to existing one?
>
> page[:article_body][:value] = "text"
>
> e.g. overwrites the old content completely.
>
> Do I need to use request.raw_post or reques.query_string in some way?
>
> Best regards
> Ingo
>
> --
> Posted viahttp://www.ruby-forum.com/.

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Ingo Paulsen

2007-Mar-25 21:23 UTC

head link

Re: Insert text into text area field with RJS

Thanks for this Eden,

just wondering:

page << "$(''article_body'').value +=
''\n\\blah\n''"

with some extra newlines and a backslash works in a javascript function:

function insertText(obj,myText) {
  //obj.value += myText;
  $(''article_body'').value += ''\n\\blah\n''
}

but not within a RJS environment (only tabs for example):

render :update do |page|
  page << "$(''article_body'').value +=
''\n\\blah\n''"
end

Any ideas?


Regards
Ingo
> When in doubt, drop to javascript:
> 
> page << "$(''article_body'').value +=
''blah''"
> 
> On Mar 26, 2:10 am, Ingo Paulsen
<rails-mailing-l...-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org>

-- 
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eden li

2007-Mar-26 02:17 UTC

head link

Re: Insert text into text area field with RJS

Where is your RJS being loaded up?

Your escaping is a off with the newlines, so that could be the issue.
When you use #<<, you''ll be dumping a string directly to
javascript,
and ruby''s quoting is getting in the way, so
"$(''article_body'').value
+= ''\n\\blah\n''" would be sent to your browser as:

"$(''article_body'').value += ''
\blah
''

Instead you should escape the newlines.  Also, you''ll need to double
escape the \\ before the b, because ''\b'' will get interpreted
in
javascript as a backspace character:
"$(''article_body'').value += ''\\n\\
\\blah\\n''". Or you can use ruby single quotes and heredocs to
make
things look nicer although you won''t be able to insert variables into
the string block.

page << <<-''end''
  $(''article_body'').value += ''\n\\blah\n'';
end

On Mar 26, 5:23 am, Ingo Paulsen
<rails-mailing-l...-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org>
wrote:> Thanks for this Eden,
>
> just wondering:
>
> page << "$(''article_body'').value +=
''\n\\blah\n''"
>
> with some extra newlines and a backslash works in a javascript function:
>
> function insertText(obj,myText) {
>   //obj.value += myText;
>   $(''article_body'').value +=
''\n\\blah\n''
>
> }
>
> but not within a RJS environment (only tabs for example):
>
> render :update do |page|
>   page << "$(''article_body'').value +=
''\n\\blah\n''"
> end
>
> Any ideas?
>
> Regards
> Ingo
>
> > When in doubt, drop to javascript:
>
> > page << "$(''article_body'').value +=
''blah''"
>
> > On Mar 26, 2:10 am, Ingo Paulsen
<rails-mailing-l...-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org>
>
> --
> Posted viahttp://www.ruby-forum.com/.

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Ingo Paulsen

2007-Mar-26 07:48 UTC

head link

Re: Insert text into text area field with RJS

Thanks again Eden,

this was helpful for me. I didn''t get the double backslash (escape) 
point yesterday.


Regards
Ingo
> Where is your RJS being loaded up?
> 
> Your escaping is a off with the newlines, so that could be the issue.
> When you use #<<, you''ll be dumping a string directly to
javascript,
> and ruby''s quoting is getting in the way, so
"$(''article_body'').value
> += ''\n\\blah\n''" would be sent to your browser as:
> 
> "$(''article_body'').value += ''
> \blah
> ''
> 
> Instead you should escape the newlines.  Also, you''ll need to
double
> escape the \\ before the b, because ''\b'' will get
interpreted in
> javascript as a backspace character:
"$(''article_body'').value += ''\\n\\
> \\blah\\n''". Or you can use ruby single quotes and heredocs
to make
> things look nicer although you won''t be able to insert variables
into
> the string block.
> 
> page << <<-''end''
>   $(''article_body'').value +=
''\n\\blah\n'';
> end
> 
> On Mar 26, 5:23 am, Ingo Paulsen
<rails-mailing-l...-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org>

-- 
Posted via http://www.ruby-forum.com/.

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Sudhi Kulkarni

2009-Mar-19 10:46 UTC

head link

Re: Insert text into text area field with RJS

Ingo Paulsen wrote:> Thanks again Eden,
> 
> this was helpful for me. I didn''t get the double backslash
(escape)
> point yesterday.
> 
> 
> Regards
> Ingo
> 
>> Where is your RJS being loaded up?
>> 
>> Your escaping is a off with the newlines, so that could be the issue.
>> When you use #<<, you''ll be dumping a string directly to
javascript,
>> and ruby''s quoting is getting in the way, so
"$(''article_body'').value
>> += ''\n\\blah\n''" would be sent to your browser
as:
>> 
>> "$(''article_body'').value += ''
>> \blah
>> ''
>> 
>> Instead you should escape the newlines.  Also, you''ll need to
double
>> escape the \\ before the b, because ''\b'' will get
interpreted in
>> javascript as a backspace character:
"$(''article_body'').value += ''\\n\\
>> \\blah\\n''". Or you can use ruby single quotes and
heredocs to make
>> things look nicer although you won''t be able to insert
variables into
>> the string block.
>> 
>> page << <<-''end''
>>   $(''article_body'').value +=
''\n\\blah\n'';
>> end
>> 
>> On Mar 26, 5:23 am, Ingo Paulsen
<rails-mailing-l...-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org>
Hi,

This helps for me but I have 1 doubt

def add_text_link(name)
    link_to_function name do |page|
begin
        page << <<-''end''
  $(''text_area'').value += "\n Hello world"  ;
end
end

I added above code in the RJS, this works but if I need to use the name 
parameter that is passed in how do I do it?

I tried #{name} but no luck...

Thanks,
Sudhindra



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